DE2938905A1 - METHOD AND DEVICE FOR PRODUCING MOLDINGS FROM THERMOPLASTIC PLASTIC, WHICH READS TO BE SET IN ITS PART CRYSTALLINE CONDITION BY MEANS OF PHYSICAL INFLUENCES, IN PARTICULAR TEMPERATURE INFLUENCES - Google Patents

Description

PATENT ADVOCATE DIPL.-PHYS. HEINRICH SEIDS

62 Wiesbaden · Bierstadtcr Höhe 15 ■ rostfach 12068 ■ Telephone (0 61 21) 56 53 82 Postscheck Frankfurt / Main 1810 08 - 602 · Bank Deutsche Bank 395 63 72 ■ Nass. Sparkasse 108 00 30 65

Wiesbaden, September 25, 1979 X 222 S / we

Bellaplast GmbH
Karl-Bosch-Strasse 10 6200 Wiesbaden

Method and apparatus for making molds made of thermoplastic material, which by means of physical influences, in particular temperature influences, can optionally be set in its partially crystalline state

The invention relates to a method and an apparatus for producing moldings from thermoplastic Plastic, which by means of physical influences, in particular temperature influences, optionally in its semi-crystalline Can be set by:

Forming a semi-finished product, in particular continuous extrusion of a tape or tube from the plasticized plastic,

Stabilizing the semi-finished product by cooling at least on one surface,

Thermal conditioning of the stabilized semi-finished product Thermoformability and

- Thermoforming to form dimensionally stable final molded articles from the semi-finished product.

130 0 16/0098

Dipl.-Phy ». Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · Pottfach 5105 · ^ (o 61 21) 56 53 8a

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From DE-OS 28 30 740 and DE-OS 28 30 788 are processes known for making thin-walled articles from crystalline thermoplastic material. That in these proceedings The thermoplastic material to be processed, in particular polyolefin, is only more crystalline in any case Type and thus only offers the possibility of the partial, crystalline state in the molding wall more or less strongly crystalline and through temperature control and use of physical influences the im To influence the plastic of the molding wall contained crystals. Accordingly, these are known methods also aimed at the crystallinity of the plastic and the physical influence of the To control crystals in the plastic in the manufacturing process of the moldings in such a way that optimal approximation on the desired properties of the molding wall and at the same time useful requirements for thermoforming are achievable.

From GB-PS 1 514 277 the production of Formings, in particular bottles, made of polyester material by combined injection molding and blow molding are known. According to this, a preform should first be produced by injection molding and stabilized on the outer surface by cooling will. There should then be a first widening with stretching of the cooled wall areas and then the complete one Molding done by blow molding. This

130016/0096

Dipl.-Phys. Heinrich Seids · Palentanwalt · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · Postfach 51 05 - <[? (O 61 21) 56 53 82 ^!

known method is relatively complicated, takes a considerable amount of time and cannot be continuous Carry out the process while forming a semi-finished product.

In contrast, it is the object of the invention to provide a method and a device that the user enable when processing plastics which are affected by physical influences, in particular temperature influences The plastic in the molding wall can be set to either amorphous or partially crystalline as required amorphous or set in a desired crystallinity state and degree of crystallinity and thereby desired physical properties, e.g. desired ones To achieve elasticity, strength and / or temperature resistance of the molded article.

According to the invention, this object is achieved by using the following method features:

for the production of moldings from such plastic, the crystallinity of which can be set between amorphous and partially crystalline Adjustment of the desired crystallinity state in the molding wall by means of a first, on the semi-finished product thermal conditioning to be carried out and a second thermal conditioning to be carried out on the molding;

Dipl.-Phys. Heinrich Seids ■ Patent attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · PO Box 51 05 ■ ξ? (Ο 61 2ΐ) 5ό 53 ^ε *;

the deforming between stabilizing and thermo, j first thermal conditioning to be carried out on the Vi Physical influences to be exerted on semifinished products are to be determined in advance in order to achieve a ι desired preparatory crystallinity state 'as well as thermoformability of the plastic of the semi-finished:

stuff matched and modified, with over the half-ι

• Γ tool cross-section on the subsequent thermal!

Deformation process coordinated and the desired! final crystallinity state in the plastic of the ' molding wall preparatory temperature profile is set; and _:

the second thermo-conditioning during the thermo j

deformation process and optionally still attached to it ' then, with temperature control, production j or preservation of the desired final crystalline

ity state in the plastic of the molding wall in connection with bringing about the dimensional stability of the Formlings executed.

The method according to the invention offers, on the one hand, a large number of options that can be modified and set as desired Process parameters that are reproducible and precisely determinable in advance, the final crystallinity state of the plastic in the molding wall and the physical properties essential for the use of the molding affect., Effective onset and _______

ao

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadler Hohe 15 · Postfach 51 05 · Q? (O 61 23) 56 53 82 j

mutual combination of the process parameters used, in particular the heat treatment during the process, is particularly cheap through the use of two .Thermo-conditioning courses. Furthermore, the invention offers Procedure also the possibility of including additional, physical treatment steps such as stretching, rolling, calendering, compaction, irradiation, electrostatic treatment, electromagnetic Treatment and the like more without the stability of the manufacturing process and the desired stable setting to impair the crystallinity state in the plastic of the molding wall. Even for these additional ones physical treatment steps, the two thermo-conditioning courses offer favorable application and Possible combinations.

A basic method possibility given within the scope of the invention cjöit before that

the semi-finished product during stabilization and initial thermal conditioning over its entire cross-section while setting the desired final crystallinity state is cooled to a temperature at which no significant change in the crystallinity state takes place more in the plastic, including when setting up the temperature profile for the Requirements for thermoforming in all areas of semi-finished products such temperatures are maintained at

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Dipl.-Phys. Heinrich Silk ■ Patent Attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · Postfach 51 05 · ^ "(o 61 21) 56 53 8i

which no significant change in the crystallinity state occurs, and

thermoforming, a deep drawing and a second
Thermo-conditioning to fix the crystallinity · ■ state in the plastic and the formed and
solidified molding wall.

In this, possible within the scope of the invention, the basic process sequence in the plastic is the
Molding wall desired final crystallinity

was largely at an early stage, namely when the semi-finished product was stabilized and thermo-conditioned for the first time

j set and until the moldings are finished j

largely retained. ■;

This basic procedure can be used to set a largely amorphous state in the plastic in the semi-finished product during stabilization and subsequent first thermal conditioning
this largely amorphous state during extensive thermo-conditioning including thermoforming, if possible

largely to be preserved. The ones made this way!

I moldings have practically ■ in the plastic of their wall

amorphous state and are characterized by relatively high!

i elasticity and resilience. You have for it

but only relatively low temperature resistance

i__L

Dipl.-Phys. Heinrich Seids · Patent Attorney ■ 6200 Wiesbaden 1 · Bierstadter "HoKe 15 · Postfach 51 05 ■ iSf (o 6i 21) 56 53

Another basic method that is possible within the scope of the invention is that the semifinished product is rapidly cooled over its entire cross-section during stabilization and initial thermo-conditioning and is set to a temperature profile that allows thermoforming but maintains temperatures in all semifinished product areas in which there is no significant change in the crystallinity state in the respective plastic; A mold surface is carried out .. d _as thermoforming at least, which is heated to a temperature which occurs in the crystal growth turn in the respective plastic and

the second that takes place or begins in contact of the molding wall with the heated mold surface Thermal conditioning in terms of temperature and duration to achieve a desired partial crystallinity of the plastic of the Fomfling wall is matched.

In this procedure, a crystallinity state is set in the plastic of the semifinished product in preparation and starting from this crystallinity state during thermoforming the desired final crystalline ity state generated in the molding wall. The plastic of the semi-finished product can be thermo-conditioned for the first time keep in an essentially amorphous state. But it is also possible ^ the plastic__de ^ s semi-finished product Jbeim_

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Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden χ · Bicrstadter Höhe 15 · Postfach 51 05 · Q? (O 61 21) 56 53 82 1

first thermal conditioning a first low j To undergo crystal growth. Choosing the one j

■ I or another possibility is directed, among other things, \

i according to the desired final crystallinity state j

1 in the plastic of the molding wall and during the ι

Thermoforming desired degree of crystal growth, j

In order to bring about the crystal growth during the thermoforming to the desired extent, the mold surface at a temperature in the range below to above the temperature for optimal crystal growth in the respective Plastic are held. If one wants the highest possible degree of crystal growth during the Thermoforming with an appropriately short thermoforming time reach, the mold surface will be at a temperature in the range of the temperature for optimum Keep crystal growth in the respective plastic, if necessary »in the upper part of this temperature range by as much as possible quickly in the plastic for optimal crystal growth set suitable temperature.

If one in the process according to the invention when stabilizing and first thermal conditioning of the semi-finished product

130016/0096

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 ■ Bierstadter Höhe 15 ■ Postfach 51 05 · (& (o 61 21) 56 53

sets such temperature conditions at which practically no or only very slight changes the state of crystallinity occur, then the semifinished product can be used during the first thermo-conditioning and / or between the first thermo-conditioning and thermoforming while practically maintaining it the crystallinity state of its plastic to stretching, for example biaxial stretching as additional subject to physical processing. This stretching can result in the plastic or in a practically amorphous state even if the plastic is in a more or less partially crystalline state. This stretching has in the context of Process according to the invention the surprising effect that under this additional, physical influence produced moldings high strength, high elasticity and high temperature resistance to each other show united.

Another possibility for carrying out the invention The method consists in that - the semi-finished product during stabilization and initial thermo-conditioning on its surface areas to temperatures suitable for handling the semi-finished product Solidification and inside at temperatures for optimal crystal growth in the respective plastic is set, and

thermoforming on at least one mold surface

Dipl.-Phys. Heinrich Scids Patent Attorney 6200 Wiesbaden t Bierstadter Hohe 15 Postfach 51 05 ζ5? (Ο 6i 21) 56 53 8i

takes place, which is heated to a temperature at which crystal growth in the respective plastic entry.

This variant embodiment of the method according to the invention is particularly suitable for those cases in which the most extensive possible crystallization of the Plastic in the molding wall is desired. Manufactured according to this variant of the process Moldings are characterized by a particularly high temperature resistance the end. In this implementation variant of the method according to the invention, however, it is expedient to that the plastic inside the semi-finished product due to the influence of the set temperature and the time Set the duration of the first thermal conditioning to form such a crystallinity state in which the respective plastic is still thermoformable. You can, however, if you wish - The plastic inside the semi-finished product due to the influence of the set temperature and the time!

lent duration of the first thermo-conditioning into a \ beyond the limit of the actual thermoformable!

ability of the respective plastic lying crystallinity j

state. In such a case, the surface

areas of the semi-finished product that are kept more or less in an amorphous or only slightly partially crystalline state],

trays that are sufficiently durable during thermoforming!

130016/0096

Diploma Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadtcr Höhe 15 Pos'fac !. 51 o; Fl? (J 61 21), 6 53 82 j

between which the plastic, which has already crystallized outside of the actual thermoformability, is located in the Can still be safely deformed inside the semi-finished product. In this latter embodiment of the invention In the process, it is particularly advantageous to bring the mold surfaces to a temperature for optimal crystal growth to be heated in the respective plastic. This results in a final warming through of the whole Plastic of the molded wall formed and thereby a uniform crystallization.

Another possibility for carrying out the invention The method provides that the semi-finished product is stabilized and initially thermo-conditioned at the surface areas of its cross-section to temperatures for handling the Set suitable solidification of the semi-finished product and essentially on the inside during the extrusion of the Material band used plasticizing temperature is left;

- The thermoforming takes place on at least one mold surface which is heated to a temperature at which crystal growth occurs in the respective plastic and
the molding wall for the second thermo-conditioning via a final crystalline

the molding wall on carefully prepared mth time period.

130016/0098

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden ι ■ Uierstadtcr I'il.e ij · Postf ^ Ui 51 c ^ · &"(.. 61 2.) 56 53 Sz

a temperature is maintained at which crystal wax-i

turn takes place in the plastic of the molding wall. j

In this, possible within the scope of the invention, process

i guide, the plastic inside the semi-finished product is placed on J

maintained at a temperature above that;

Temperature range in which crystal growth j

occurs in the respective plastic. The surface j

On the other hand, some of the semi-finished products are largely depleted ]

cools that in them the respective crystalline state, |

for example, amorphous state or low partial I crystalline state is frozen. In contrast to ! conventional inline thermoforming processes '.'

in the actual thermoforming process now a fully! constant heating of the entire formed molding

wall and with this warming up during the thermo- |

deforming and second thermo-conditioning the input ■

position of the more or less desired in each case ■

strongly partially crystalline state. Since with this type ι the process control of the plastic inside dec

Semifinished considerable amounts of heat in the first thermal ί

Conditioning and up to thermoforming and;

brings a second thermo-conditioning with you, you will advance!

part way the temperature on the mold surfaces
slightly below temperature for optimal crystal . set growth to allow faster cooling j

l___de_s plastic in the interior of the molded wall formed;

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Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · BierstaJter Höhe 15 · P.O. Box 51 05 · ζ? (Ο 6ι 21) 56 53

cause in that temperature range in which optimal crystal growth occurs.

In all process variants according to the invention in which crystal growth occurs during the actual thermoforming is allowed, you can keep the molding wall in contact with the mold surface until the plastic has reached the desired degree of crystallinity ο but you can also increase the crystal growth only introduce the mold surface and remove the molding from the mold surface when sufficient dimensional stability has been achieved remove and the second thermo-conditioning in one at the output of the thermoforming device perform subsequent heat treatment device. This second thermal conditioning - starting on the mold surface - can take place at a constant temperature be carried out “You can also change the temperature change during the second thermal conditioning, for example with the temperature falling over time temper. In the case of the latter type of temperature control, a temperature at the mold surface can be used as a basis which is suitable for optimal crystal growth in the respective plastic and the molding wall in terms of time cooling down.

The thermoforming can in the process according to the invention while exerting mold pressure on the plastic of the mold

130016/0098

Dipl.-Phys. Heinrich Scids · I'atcnljnwalt · 6200 Wiesbaden t · Uicrst.idler Hohe 15 · l'oslfach 51 05 ■ φζ '(ο6ι. Ι) ;; ι. y ·, Λι

lingwand are executed. This form pressure can possibly "; suitable for a certain compression of the plastic 'can be selected. 'j

The inventive method also allows that half:

1 tool between extrusion and thermoforming;

a calendering and / or rolling process under, thickness reduction for additional physical: influencing the crystallinity state. '\ This calendering or rolling can be incorporated into the stabilization ι

of the semi-finished product are included. j

The inventive method can preferably be used for i use the manufacture of moldings from polyethylene terephthalate. However, it also happens just as well the production of moldings from modified poly-

ethylene terephthalate, for example 1,4 - cyclohexyl; dimethylene terephthalate / isophthalate copolymer.
into consideration. The production of
Moldings from polybutylene terephthalate in the process according to the invention. In the latter case, however, is closed

note that the temperature range within which
Crystal growth occurs in polybutylene terephthalate,
far down that _o extends to about 30 ^0C.

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Dipl.-Phys. Heinrich Seids · Palentanwalt · 6200 Wiesbaden 1 · Bicrstadter Höhe 15 · Postfach 51 05 · ® (o 61 21) 56 53

A device with a is particularly suitable for carrying out the method according to the invention Extrusion device for the continuous production of the semi-finished product, a stabilizing device for the Semi-finished product and a thermoforming device and

a thermo-conditioning device for the semi-finished product, and possibly a device for separating out the Moldings from the surrounding parts of the semi-finished product. Such a device should be known according to the invention * Ό have the following features: - Between the stabilization device and the thermal

A first thermo-conditioning station is arranged in the deforming device; The thermoforming device lies in a second

Thermal conditioning station; j

The stabilization device and the thermoforming device are with the control device to previously defined, possibly programmable regulation the physical in the stabilization device and the thermoforming device, in particular equipped with thermal effects on the plastic of the semi-finished product and the thermo-conditioning stations are facilities for physical, in particular thermal, action on the plastic of the semi-finished product or molded

lings and control devices to previously defined, possibly programmable regulation of the impacts 130018/0096 ~~

ORIGINAL

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden t ■ Bierstadter Höhe 15 · Postfach 51 05 ■ ί? (Ο οι 2j) 56 53 82

assigned direction. \

Such a device has the advantage that it can be used without j

j significant retooling measures to virtually all \

desired variants of the method according to the invention can be carried out j. It also offers the advantage that input, directions for required special, physical equipment

effects such as stretching, rolling, irradiating, etc. without | Difficulty at the desired point in the device j can be inserted »ι

The device according to the invention can be used in its thermo-conditioning stations primarily in the first!

Thermal conditioning station for the semi-finished product with heating ί

and cooling devices for the semi-finished product or _o the form \

be equipped with control options for temperature and heating or cooling time. With this equipment], the thermal conditioning is in the \

Device in all conceivable variants of the process with 'full safety and optimum efficiency feasibility j bar. j

ι The first thermal conditioning station, namely the one:

for the semi-finished product, a stretching device for the j

Semi-finished product with control option for stretching temperature, stretching |

degree and, if necessary, the stretching speed. That

130016 / 009Θ

Dipl.-Phys. Heinrich Seids · Palentanwalt ■ 6200 Wiesbaden ι · Bierstadtor Höhe 15 · Postfach 51 05 · ® (o 61 21) 56 53

Assignment of the stretching device to the first thermal conditioning station has its particular advantage that the stretching process is carried out in one stage of the semi-finished product is where optimal conditions for the stretching itself and also optimal conditions for the Effect of stretching on the crystallinity state of the plastic are adjustable and also up to Thermoforming can be retained.

If one wants additional devices for calendering and / or or in the device according to the invention

! Rolling a strip-shaped semi-finished product under thickness

j provide for a reduction, so this could stabilize ^

device can be assigned.

The cooling devices provided in the stabilizing device can be used in the device according to the invention with devices for generating a controllable one that is effective in chronological order on the plastic of the semi-finished product Be equipped with temperature control. This means that when several cooling devices are arranged one behind the other these can be operated at different temperatures.

In the device according to the invention, the thermoforming device should expediently be equipped with at least one molding tool

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Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · P.O. Box 51 05 ■ ^ "(o 61 21) 56 53 82

Has coolable mold surface. The
Thermoforming device at least one molding tool
contain, which with a control device for generating j a previously definable, possibly programmable time, borrowed temperature change or temperature control during,

f of the thermoforming process on at least one upper mold | area is equipped. The thermoforming device can also contain at least one molding tool which is equipped with devices for generating a pre-determinable, controllable molding pressure. These bodies

to generate the form pressure, control devices for controllable, possibly programmable, temporal variation can be used the molding pressure during the thermoforming process' be equipped. i

In the device according to the invention, the j second thermal conditioning station can preferably be located in its entrance I area contain the thermoforming device and j is on the output of the thermoforming device j

extend beyond. Here, the second thermal-Kondition- 'ierungsstation one at the output of the thermoformable \ molding apparatus subsequent Wärmebehandlungsvor- I device for the moldings contain.

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Dipl.-Phys. Heinrich Seids ■ Patent attorney ■ 6100 Wiesbaden 1 · Bierstadter Höhe 15 · PO Box 51 05 · <3? (O 61 21) 56 53 82 j

Embodiments of the invention are explained in more detail below with reference to the drawing. Show it:

1 shows a scheme for the basic sequence of the method according to the invention or the

basic structure of a device according to the invention;

2 shows the dependence of the crystal growth rate V on the temperature T at

Polyethylene terephthalate; I.

Fig. 3 shows a group of temperature profiles for ι a first possible embodiment of the method according to the invention with polyethylene terephthalate ;

4 shows a group of temperature profiles for

a second embodiment of the method according to the invention with polyethylene terephthalate ;

5 shows a group of temperature profiles for a third embodiment of the

process according to the invention with polyethylene terephthalate;
6 shows a group of temperature profiles for

j a fourth option for the

method according to the invention with poly

ethylene terephthalate;

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3?

Dipl.-Phys. Heinrich Seids Patent Attorney 6200 Wiesbaden ι Bierstadter Hohe 15 Postfach 51 05 ^ (o 61 21) 56 53 82

7 shows a group of temperature profiles for a fifth embodiment of the process according to the invention with polyethylene terephthalate ;

8 shows a group of temperature profiles for

a sixth embodiment of the process according to the invention with polyethylene terephthalate and

9 shows a group of temperature profiles for a seventh embodiment of the

Process according to the invention with polyethylene terephthalate .

Figure 1 illustrates the sequence of operations in one ^!

Preferred embodiment of the method for producing ι thin-walled articles made of thermoplastic material, |

the optionally amorphous or more or less partially crystalline;

! can be adjusted. In the example shown is

an extruder press 11 is provided which is suitable for |

the granulated thermoplastic material, for example; wise polyethylene terephthalate, to include and continuous-i lent to compress and heat until melted

is and with a temperature T _E (Figures 3 to 8) above j

half of the crystal melting point to the extrusion tool, \

for example a slot nozzle 12 to be supplied. !

This slot nozzle 12 results in the present example;

i a strip-shaped semi-finished product 10, which is produced from the slot die I.

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Dipl.-Phys. Heinrich Seids ■ Patent Attorney · 6200 Wiesbaden 1 ■ Bierstadtcr Höhe 15 · Postfacfi '51 05 · S? (O 61 21) 56 53 82

12 is introduced into the stabilization device 13 as it comes will. In the stabilization device 13, the semifinished product 10 is primarily at least one by cooling Surface made manageable for the further process. The ribbon-shaped runs out of the stabilizing device 13 Semifinished product 10 in a first conditioning station 14. This semifinished product conditioning station 14 has primarily the purpose of setting preparatory temperature profiles in the semi-finished product 10 o But it is also the purpose of the semi-finished product 1q Conditioning station 14 to exert additional desired physical influences on the semi-finished product 10 or beforehand to fix additional physical influences exerted in the semi-finished product 10.

j For these purposes, the semi-finished product conditioning station 14 is equipped with heating devices and cooling devices, which have control devices that can be controlled and, if necessary, programmed as desired. In addition, the Semifinished product conditioning station 14 assigned to devices for physically influencing the semifinished product 10 be. This includes stretching devices, irradiation devices, possibly rolling and compacting devices.

I The latter devices can, however, already be used in

the stabilization device 13 are included.

130016/0096

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Biersta » ¹ » -? - Höh »15 · j ^ -trac ¹ » 51 05 · '2 "(O ^.; I n) 56 53 82 I.

In the example shown, the semi-finished product conditioning |

i station 14 is designed in two stages, namely with a first stage 14a, which is used for treatment, ie for thermal conditioning of the semi-finished product 10 that is continuously passed through
is formed, and with a second stage 14b, which for
Treatment and thermo-conditioning of the gradual
semifinished product 10 passed through is formed ₀ Zv / ischen

two stages 14a and 14b of the semi-finished product conditioning station j

14 - included in the semi-finished product conditioning station 14 - j is a device 15 for controlling and converting the loading!

movement of the semi-finished product 10 from continuous feed to ' gradual feed provided. With this device ι

15 is the feed movement of the semi-finished product 10 on the i Work cycle of the gradually picking up the semi-finished product 10 '

Finished part conditioning station 17 with thermoforming

direction 16 coordinated. j

This pre-fabricated conditioning station 17 or second \ thermo-conditioning station 17 contains in its first part the thermoforming device 16, which is shown in the!

Example is equipped with deep-drawing tools whose ' Mold surfaces can be heated or cooled as desired and also j to change the temperature during each work cycle j can be formed. According to the representation of Figure 1! the thermoforming device 16 is followed by J a section of the precast conditioning station 17,

130016/0096

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · Postfacn 51 05 · ξ? (Ο 6ι 21) 56 53

that in the example shown from the one from the thermoforming device 16 coming band-shaped semi-finished product with molded-in formations 16 gradually go through confuses. In this second section of the precast conditioning station 17 are heating and cooling devices appropriate. In addition, there can also be devices for the physical treatment of the molded articles 18, for example be arranged for irradiation or sonication and the like.

From the second thermo-conditioning station 17, the j band-shaped semi-finished product with molded-in formations 18 in ■

j a punching device 19 with which the moldings 18 are cut out and the semi-finished product residues 20 for material recovery if necessary, direct return of the comminuted material to the extruder press 11 can be discharged.

The semifinished product 10 mentioned above as a plastic tape by way of example can be used when processing polyethylene terephthalate have a thickness of about 2 mm.

Instead of strip-shaped semi-finished products, any other conceivable and continuously producible semi-finished products are also used into consideration, for example hoses, profile strands and the like β more.

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Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · Postfach 51 05 · ® "(o 6x 21) 56 53 82

The semi-finished product can also consist of different layer material
Be plastics, of which however a substantial \ part should be such plastics obtained by physical interference especially by temperature control \ election as amorphous or desired extent partially crystalline a-j

are adjustable. j

A pressure treatment of the plastic can at the half-finished \ for example by rolling or calendering in the i stabilizing station 13 or in the first part 14a of the
Semi-finished conditioning station 14 are made. It is also conceivable \, a pressure treatment of the plastic surface by gradually pressing the gradual; comprise performing i through the second part 14b of the semi-finished-conditioning station 14 durchzuführenο j The invention further enables, pressure treatment at the molding or j finished part that is inside the second thermal conditionable \ station 17. Preferably, it will be this pressure treatment at | Finished part by exercising a predetermined shape; pressure in the thermoforming device 16 run. ,

Instead of the pressure treatment, be it on the semi-finished product or arn

ι prefabricated part, or in addition to it, can also be an ultrasonic;

treatment can be carried out. The pressure treatment or \ ultrasound treatment results in addition to the influence
the crystallinity state is also significantly increased

130016/0096

Dipl.-Phys. Heinrich Scids ■ Patent attorney ■ 6200 Wiesbaden 1 · Bicrstaditr iIOl> e 15 · Po < >> faclv> i 05 C? (o 6. zi) 56 57

Rigidity and thus improved cold dimensional stability of the moldings produced.

The curve shown in Figure 2, showing the dependency of the crystal growth rate V in polyethylene terephthalate as a function of the applied in degrees Celsius temperature T. As Figure 2 shows, polyethylene terephthalate has, between 10O ⁰ C and the crystalline melting point (250 to 260 ° C) a crystal growth Temperature range within which optimal crystal growth occurs at around 170 ^° C. to 175 ^° C. Above the crystalline melting point, polyethylene terephthalate changes to a plasticized state. Below 60 ⁰ C is polyethylene terephthalate before solid state, without the crystal growth is still in the material in significant measure vonstatten. This means that it is possible to freeze the material by cooling the Polyathylenterephthalats below 6O ⁰ C, the respective state of crystallinity.

To simplify the explanations, the amorphous state should also be used as a crystallinity j in the context of this application state, namely to consider a state with "crystallinity zero".

130018/0096

Dipl.-Phys. Heinrich Scids Patent Attorney 6200 Wiesbaden 1 Bierstadter Hüne 15 Postfacn 51 05 * 5? (O 01 21) 56 53 82

i. The method according to the invention is intended to provide economically favorable manufacturing options for molded articles made of plastic with the properties described above
are made available, whereby the procedure elective

possibility for the final crystallinity state

of the plastic in the molding wall should provide. Reason j

In addition, this is achieved with the invention in that one takes advantage of the above in

1 binding with Figure 2 explained behavior of the '

The plastics considered here are a semi-finished product

by continuously extruding at one temperature;

T _E (compare FIGS. 3 to 8) produces the above '* ■

of the crystalline melting point in a temperature range ' lies in which the material is plasticized.

The material is in this plasticized state

the respective wishes and requirements of the molding;

correspondingly by the i shown in FIG

Through the crystal growth temperature range

to cool and to condition thermally that it is at Er- j

j range of the temperature range in which it is considered to be more solid!

Substance is present (with polyethylene terephthalate below \ 60 ⁰ C), a desired crystallinity state, ver! bound with desired physical properties, \

having. ■:

130016/0096

Dipl.-Phys. Heinrich Selds · Patent Attorney · 6200 Wiesbaden 1 · Bierstadte · - Hön »15 ■ Poetfach 51 05 · v? (O 61 2 \) 56 53 82!

A few examples show the possibilities that can be achieved with thermal conditioning according to the invention can be derived from the following explanation of FIGS. 3 to 8.

In the example in FIG. 3, the semifinished product is strongly cooled during stabilization during the production of moldings from polyethylene terephthalate and, during thermal conditioning, set to a temperature profile over the semifinished product thickness that is in the range from 55 to 100 ^° C., in which there is practically no crystal growth or no crystal formation occurs. The outer regions or surface regions of the semi-finished product can thereby cooled to below this temperature range, while the plastic in the interior of the semifinished product may be up to about 100 ⁰ C warm, at least not should nennens-i value exceed this temperature. During stabilization - as indicated in the upper part of FIG be frozen. During the subsequent thermo-conditioning (middle part of FIG. 3) and the second including thermoforming

130016/0096

Dipl.-Phys. Heinrich Seids - Patent Attorney · 6200 Wiesbadi-n 1 · Bicrstat! .. ι Hol · r 15 · Pri'tach -χ oj · * -? (O 6- -.1) 56 53 82

Thermo-conditioning (Figure 3, lower part) can
such temperature conditions on and inside the
The semi-finished product 10 and the molding 18 are adhered to,
that even then there is no essential crystal growth

or substantial crystal formation occur. The so

The molded product is - if ordered from pigment-free plastic - clearly transparent, which means;

that the plastic in the molding wall is practically in | is amorphous state. The temperature resistance!

of the molded article is about 70 ⁰ C. [

With this procedure, one wants a certain degree of partial crystallinity in the plastic of the mold wall
allow or train, 3D this can happen during stabilization · and first thermo-conditioning that
the cooling of the semifinished product 10 is carried out more slowly
and even partial crystallinity in a desired j

Can enter degrees "This partial crystallinity can then j during thermoforming and second thermal conditionality i kidney by appropriate temperature control (see <lower part of Figure 3) in the plastic of the molding ■

or the finished part is essentially retained. |

Figure 4 illustrates one possibility for guidance
of the method according to the invention, in which the
Semi-finished product 10 cools down quickly to make it Jbzw on its outer areas. To solidify surface areas and
130016/0096

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden t · Bierstadler Höhe 15 · P.O. Box 51 05 · &? {O 61 21) 5O 53 82

to make manageable. But the plastic in the interior of the semifinished} remains at a temperature which is appreciably above 100 ⁰ C. This transition from the temperature profile at the extrusion temperature T 1 to the temperature profile set by stabilizing can be seen from the upper part of FIG. During the thermo-conditioning of the semifinished product following the stabilization, a temperature profile can then be set in which the outer areas of the semifinished product are at temperatures of up to h0 just above 50 ^° C. and the core of the semifinished product is at temperatures above 100 ^° C. With this temperature control

j during stabilization and initial thermal conditioning

j occur in the polyethylene terephthalate inside the Halbi

stuff 10 noticeable crystal formation and noticeable crystal

growth, which manifests itself in the opacity of the material. Since the period of time between conditioning of semifinished products (middle part of FIG. 4) and thermoforming with conditioning of finished parts (lower part of FIG , by which the temperature inside the semi-finished product 10 is above 100 ^° C., determine beforehand how great the degree of crystallization of the semi-finished product is at the start of the conditioning of the finished part.

130016 / 009B

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadler Höhv'.x? Poitfacli 51 05 <£ j? (O 6j 21) 5η , $ Sz

The thermoforming is carried out in this example by pulling out the material on a hot mold surface whose temperature is to lie at 120 to 180 ⁰ C. In the illustrated example, a temperature is assumed at the mold surface at 180 ⁰ C "With the onset during thermal forming and possibly over the thermoforming addition, still held precast conditioning process thus occurs a far-reaching crystallization of the polyethylene terephthalate an" The molding receives a Opakewandung (if of pigment-free material ¹

is assumed). The temperature resistance of the j

Molding is above 200 ⁰ C. i

A similar process sequence would be achieved according to FIG bar, if a temperature profile is set during stabilization and / or conditioning of semi-finished products under pressure, j as shown in the upper and middle parts of Figs. In such a case you want to Conditioning of the finished part would cause extensive crystallization in the plastic, based on The almost amorphous state of the polyethylene terephthalate is either available for a longer period of time to crystallize out or the degree of crystallinity would not be as high as with the starting conditions in accordance with FIG. 4. As indicated in the lower temperature profile of FIG. 5, it is also possible in such a case

130016/0096

Dipl.-Phys. Heinrich Sclds ■ Patent attorney · 6200 Wiesbaden ι · Bicrsladter Hohe * 5 · Γ ostfach> i 05 · & (o 61 21) 515-53

may work with a somewhat higher temperature at the mold surface, for example, to 200 ⁰ C. Above all, however, the conditioning of the finished part can also be extended in time correspondingly longer after the thermoforming, as is indicated in FIG. 1 with the second thermo-conditioning station 17. The moldings produced in this way have transparent walls (if pigment-free material is assumed). The temperature dimensional stability of the moldings thus produced is about 150 ⁰ C to 200 ⁰ C.

FIG. 6 shows a possibility for the implementation of the method according to the invention, which differs from that according to FIG. 3 or that according to FIG Thermoverforraen stretching of the semifinished product 10 is carried out. During this stretching, as the mean temperature profile in FIG. 6 indicates, additional cooling takes place on the semifinished product 10. The stretched, preferably biaxialgereckte semi-finished product 10 is then deep-drawn during thermoforming to the hot mold surface, which may have a temperature of for example 150 to 200 ⁰ C. In the example of Figure 6 is assumed a temperature of about 200 ⁰ C at the shaping surface of the thermoforming tool. The one in conduct of the proceedings

130016/0096

Dipl.-Phys. Heinrich Seids · Patenlanwalt · 62ου Wiesbaden t · Bierstadtcr Hiü'u? 35 "* T \» stfacH jio; ς '? (Oc: 2i), ( y $ 82;

j moldings produced according to Figure 6 have again j transparent wall (when starting from pigment-free material), but yet a significantly improved temperature resistance, namely up to temperatures of 20O ⁰ C to 250 ⁰ C. In addition, the moldings thus produced by increased draw Strength and elasticity.

In the example of Figure 7, in stabilizing and then set a temperature profile in the thermal conditioning of the semifinished product 10 can be cooled at the relatively high surface areas 10a to a temperature below 100 ⁰ C and maintained in substantially amorphous state of the Polyathylenterephalats. A maximum temperature of approximately 150 ° C. is set inside the semi-finished product 10. Proceeding from this, shown in the middle part of Figure 7, the temperature profile thermoforming and precast-conditioning occur at mold surfaces are heated to about 150 to 180 ⁰ C. In the illustrated example, the temperature of both mold surfaces between which the blank wall 18 is formed, 18O ⁰ C ₀ The plastic of the preform wall 18 is substantially crystallized out between the two to 180 ⁰ C held Formoberiläche. The molding produced in this way has a temperature resistance of about 20O ⁰ C.

130016/0096

Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadtcr Hone "15 · Postfach 51 05 · ® (o 61 21) 36 53 82 i

In the example in FIG. 8, a.

I carried out rapid quenching of both surfaces of the semi-finished product 10 j. During conditioning of the semifinished product, a temperature between about 50 and 100 ^° C. is then set on the surfaces of the semifinished product, while the polyethylene terephthalate in the core or interior of the semifinished product still largely retains the extrusion temperature, i.e. at a temperature of about 270 ^° C. The semifinished product equipped with this temperature profile (shown in the middle part of FIG. 8) is thermoformed between two hot mold surfaces. The mold surfaces can have a temperature of 150 to 160 ° C. As can be seen in the lower part of FIG. 8, an essential equalization in the temperature profile occurs between the mold surfaces. Characterized the molding wall formed 18 is largely crystallized polyethyleneterephthalate at about 16O ° C and in the inner region of the blank wall 18 at about 190 ° C in the surface regions, so in the outer regions slightly below and in the inner region somewhat above the optimal crystallization temperature of about 170 ⁰ C. The moldings produced in this way have opaque molding walls (if pigment-free material is assumed). The temperature resistance is "about 200 ⁰ C.

130016/0096

Dipl.-Phys. Helnridi Scids ratcnt.uiw.ili · 6200 WicsbaJ.-u ι · Bicrstadu-r H-Im- -5 · "o: .lf.ul, ι o ;,« -, ^ (o ι ,. _; · ι) ■, <v; _H ,

FIG. 9 shows a modified mode of operation in which, during stabilization, the semi-finished product is made manageable by rapidly quenching both surfaces. When semi-conditioning a temperature profile is set, which - as the central part of the figure shows between extrusion temperature (26O ° C to 290 ⁰ C) and about 170 ⁰ C. When thermoforming and precast-conditioning a temperature profile between 12O ⁰ C and 170 ⁰ C is set at the molding wall. The moldings produced in this modified way also have opaque molding walls (if pigment-free material is assumed) and a temperature resistance of approx. 200 to 220.degree.

In addition to the above-mentioned stretching, other mechanical and I physical treatments during conditioning of semifinished products j and correspondingly also during conditioning of finished parts;

j are practiced, for example compaction and thickness-:

Reduction by rolling or molding pressure, irradiation: with various types of radiation, ultrasound treatment

and the like more. The modes of execution described above of the method according to the invention can be used for various types of semi-finished products, for example hose, Run profile strips and the like more.

130016/0096

-so-

e e r s e

ite

Claims (1)

2938905 PATENT Attorney DIPL.-PHYS. HEINRICH SEIDS Wiesbaden · Bierstadter Höhe 15 ■ Postfach 12068 · Telephone (0 61 21J 5o 53 82 Postscheck Frankfurt / Main 181008-602 · Bank Deutsch «· Bank 39563 72 · Nass. Sparkasse Ιϋβ 00X165 Bellaplast GmbH Wiesbaden, September 25, 1979 X 222 S / wh Claims 1.) Process for making moldings from thermoplastic Plastic, which by means of physical influences, in particular temperature influences, can optionally be set in its partially crystalline state by: - Forming a semi-finished product, in particular a continuous one Extrusion of a tape or hose from the plasticized plastic, - Stabilizing the semi-finished product by cooling at least on one surface, ' - Thermal conditioning of the stabilized semi-finished product to thermoformability and - Thermoforming for forming dimensionally stable end ι valid briquettes from the semi-finished product, characterized in that - for the production of moldings from such plastic, the crystallinity state of which can be set between amorphous and partially crystalline, the setting of the desired crystalline-: state of affairs in the molding wall by a! first thermal to be performed on the semi-finished product; 13001 6 / 009S ORIGINAL INSPECTED Dipl.-Phys. Heinrich Silk ■ Patent Attorney · 6200 Wiesbaden ι · Bierstadter Höhe 15 · Postfach 51 05 ■ ® (o 61 21) 56 53 82 Conditioning and a second to be carried out on the molding Thermal conditioning is done; - The first thermo-conditioning to be carried out between stabilization and thermo-forming Physical influences to be exerted on the semifinished product in a manner to be determined beforehand in order to achieve it a desired preparatory crystallinity state and thermoformability of the Plastic of the semi-finished product can be matched and modified and thereby over the semi-finished product cross-section one that is tailored to the subsequent thermoforming process and the one required final crystallinity state in the plastic of the molding wall preparatory temperature profile is set; and - the second thermo-conditioning during the thermoforming process and optionally also then with temperature control to generate or maintain the desired end valid crystallinity state in the plastic of the Formlinp-wall in connection with bringing about the dimensional stability is carried out. Y3ÜÜ16 / 0098 Dipl.-Phys. Heinrich Scids · Patent Attorney ■ 6100 Wiesbaden ι · Bierstadtor lf.ihe 15 · Postfach 51 05 · <ξ? (Ο 6i ii) 56 53 82 2.) The method according to claim 1, characterized in that - the semi-finished product during the stabilization and first thermo-conditioning over its entire Cross-section with setting of the desired final crystallinity state up to is cooled to a temperature at which there is no significant change in the state of crystallinity takes place more in the plastic, even when setting up the temperature profils to the requirements of thermoforming in all areas of semi-finished products Temperatures are maintained at which there is no significant change in the crystallinity state, and; - with thermoforming a deep drawing and a second j thermo-conditioning to fix the ' Crystallinity in the plastic of the ' formed and solidified molded wall! take place. < 3.) The method according to claim 2, characterized in that the semi-finished product when stabilizing and first ' Thermal conditioning with extensive additional: keeping the amorphous state in the plastic j ! is rapidly cooled to a temperature ', at' which does not significantly change the crystalline Dipl.-Phys. Heinrich Silk · Patent.inwalt · 6200 Wiesbaden 1 ■ DiersUdtor Hohe 15 · Postfach 51 05 · Q? (O 61 21) 56 53 82 state of affairs takes place. 4.) The method according to claim 2 or 3, characterized in that the moldings made of polyethylene terephthalate and the temperature in the material strip can be set in a range of 50 ° to 100 ⁰ C during stabilization and first thermo-conditioning. 5.) The method according to claim 1, characterized in that - the semi-finished product during stabilization and initial thermal conditioning cooled rapidly over its entire cross-section and adjusted to a temperature profile that allows thermoforming but j maintains temperatures in all semi-finished product areas at which there is no significant change in the State of crystallinity in the respective art { substance enters; j - The Therrnover form on at least one Formober- ι surface that is heated to a temperature | at the crystal growth in the respective plastic i enter and j - the j that takes place or begins when the molding wall comes into contact with the heated mold surface second thermo-conditioning in temperatures and 130016/0098 Dipl.-Phy *. Heinrich Seids · Patent Attorney · 6200 Wiesbaden ι · Bierstadter Höhe 15 · Postfach 5105 · ζ? (Ο 6i 21) 56 53 8a Time to set a desired partial crystallinity of the plastic is matched. 6.) The method according to claim 5, characterized in that the plastic of the semi-finished product when stabilizing and; first thermal conditioning largely in amorphous, State is maintained. j 7.) The method according to claim 5, characterized in that the plastic of the semi-finished product when stabilizing and; first thermo-condensing already a first
undergoes little crystal growth. 8.) Method according to one of claims 5 to 7 »thereby
characterized in that the mold surface on a
Temperature in areas below to above the
Temperature is maintained for optimal crystal growth in the respective plastic. 9.) The method according to claim 8, characterized in that j the mold surface at a temperature in the range of Temperature for optimal crystal growth in the respective! I held plastic. 10.) The method according to any one of claims 1 to 9, characterized
characterized in that the semi-finished product during the first 130016/0098 11.) The method according to any one of claims 5 to 10, characterized in that when producing formations a \: s Polyethylene terephthalate - in stabilizing and first thermal conditioning of the semifinished product to a temperature in the range of 50 ° is set to 100 ⁰ C and - on the mold surface, a temperature in the range Dipl.-Phys. Heinrich Silk · Patent Attorney ■ 6200 Wiesbaden ί ■ Bierstadter Höhe 15 · P.O. Box 51 05 · fl? (O 61 21) 56 53 62 Thermo conditioning and / or between the first thermo conditioning and thermoforming while substantially maintaining the crystallinity state of its plastic by stretching, preferably biaxial stretching, as an additional are subject to physical influence. ' is maintained from 120 ° to 18O ⁰ C. 12.) The method according to claim 1, characterized in that j - the semi-finished product during stabilization and the first thermal j Conditioning on its surface areas on | Temperatures suitable for handling the semi-finished product Solidification and inside to temperatures for optimal crystal growth in the respective art ^! fabric is adjusted and j - The thermoforming takes place on at least one mold surface that is heated to a temperature at which! Crystal growth occurs in the respective plastic. 130016 / 009Θ Dipl.-Phye. Heiniich Seids · Patent attorney ■ 6200 Wiesbaden ι Eieriradter ΚΛιβ ι> · P.O. Box 51 ο j ■ ξ? (Ο 6ι 2ΐ) 56 53 82 ι ! 13.) The method according to claim 12, characterized in that that the plastic inside the semi-finished product through
the influence of the set temperature and the
duration of the first thermal conditioning
on the formation of such a crystalline state can be set, in which the respective plastic is still thermoformable. 14.) The method according to claim 12, characterized in that j that the plastic inside the semi-finished product by the Influence of the set temperature and the duration of the first thermal conditioning in a beyond the limit of the actual thermoformability of the respective plastic! State of crystallinity is transferred. ] 15.) The method according to any one of claims 12 to 14, characterized in that the mold surface on a
Temperature for optimal crystal growth in that
respective plastic is heated. 16.) The method according to any one of claims 12 to 15, da- ι characterized in that when producing moldings from polyethylene terephthalate
- during stabilization and initial thermal conditioning. of the material strip, the surface area temperature to about 50 ° to 10O ⁰ C and the interior 130016/0098 Dipl.-Phys. HeinriA Seids · Patent Attorney · 6200 Wiesbaden 1 ■ Bierstadter Höhe 15 · Postfach 51 05 · φ? (Ο 6ι ιι) 56 53 ^8ι range temperature set to around 140 ° to 160 ° C will and - the mold surface during the thermoforming and second thermal conditioning is heated to about 120 ° to 180 ⁰ C. 17.) The method according to claim 1, characterized in that - the semi-finished product during stabilization and initial thermal conditioning on the surface areas its cross-section on temperatures for at hand have set suitable solidification of the semi-finished product and essentially on the inside Extruding the strip of material is left at the plasticizing temperature used; - the thermoforming on at least one mold surface takes place, which is heated to a temperature at which crystal growth in the respective Plastic enters and - The molding wall for the second thermo-conditioning over one to the desired final State of crystallinity of the molded wall matched I period of time is held at a temperature at j the crystal growth takes place in the plastic of the molding wall. 130016/0098 Dlpl.-Phys. Heinrich Silk ■ Palentanwalt ■ 6200 Wiesbaden 1 · Bierstadter Höhe 15 · Postfach 51 05 · ® "(o 61 21) 56 53 82 18.) The method according to claim 17, characterized in that j that the temperature at the mold surface is slightly below the temperature is set for optimal crystal growth and the molding during the second Thermal conditioning at a temperature in the temperature range for optimal crystal growth is held. 19.) Method according to claim 17 or 18, characterized in that that the plastic in the surface areas of the semi-finished product when stabilizing and first Thermo-conditioning is kept largely in an amorphous state. 20.) The method according to claim 17 or 18, characterized in that the plastic in the surface areas of the semi-finished product when stabilizing and first j thermo-conditioning in predetermined low partially crystalline state is transferred ,, j 21.) Method according to one of claims 17 to 20, characterized) characterized that when producing moldings from ' Polyethylene terephthalate j - during stabilization and first thermal conditioning | of the material strip, the surface area temperature set to about 80 ° to 100 ⁰ C and the _25Q ° to 13 0 016/0098 Dlpl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 ■ Bierstadter Höhe 15 · P.O. Box 51 05 ■ 5? (O 61 21) 56 53 82 is left and - the mold surface during thermoforming and second thermo-conditioning to about 140 ° to 160 ° C is held. 22.) The method according to any one of claims 5 to 21, characterized in that the molding wall to the second Thermal conditioning in contact with the mold surface is held » 23.) Method according to one of claims 5 to 21, characterized in that the molding in the second Thermal conditioning removed from the mold surface and a subsequent heat treatment is subjected. 24.) The method according to claim 22 or 23, characterized in that the second thermo-conditioning Plastic of the molding wall is largely crystallized out. 25.) The method according to claim 22 to 24, characterized in that the molding wall during the second thermal conditioning is kept at a substantially constant temperature. 130016/0098 Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · "Bierstadter Hohe 15 · Postfach 5X 05 ■ ® (o 61 21) 56 53 82 i 26.) The method according to any one of claims 22 to 24, characterized in that the molding wall at the second Thermo-conditioning is tempered to a temperature that falls over time. 27.) The method according to claim 26, characterized in that the temperature control during the second thermal conditioning essentially starting from temperature for optimal crystal growth in the respective Plastic takes place cooling. i j 10 28.) The method according to any one of claims 1 to 27, characterized in | characterized in that the thermoforming by exerting j molding pressure on the plastic of the molding wall is performed. 29.) Method according to one of claims 1 to 28, characterized in that the semifinished product between the extrusion and thermoforming, a calendering and / or rolling process with a reduction in thickness is subjected to additional physical influencing of the crystallinity state. 30.) The method according to claim 29, characterized in that that the calendering or rolling process is included in the stabilization of the semi-finished product. 130016/0096 Dipl.-Phys. Heinrich Selds · Patent Attorney · 6200 Wiesbaden 1 · 'Biers'tadler Höhe 15 · Postfach 51 05 · $? (O 61 21) 56 53 31.) Method according to one of claims 1 to 30, characterized in that glycol-modified polyethylene terephthalate is used as a thermoplastic manufacturing material, 32.) The method according to any one of claims 1 to 30, characterized in that polybutylene terephthalate as thermoplastic manufacturing material is used. 33.) Device for performing the method according to one of claims 1 to 32, with an extrusion device for the continuous production of the semi-finished product, a stabilization device for the semi-finished product and a thermoforming device and, if necessary, a device for separating out the moldings from the surrounding parts of the semi-finished product, characterized by the following features: - Between the stabilization device (13) and the thermoforming device (16) is a first thermal conditioning station (14) arranged; - The thermoforming device (16) is in a second thermal conditioning station (17); - the stabilizing device (13) and the thermoforming device (16) are with the control device for previously defined, possibly programmable regulation of the stabilization device (13) and the thermoforming device 130 016/0098 Diploma Phys. Heinrich Seids ■ patent attorney ■ 6200 Wiesbaden 1 · Bierstadter Höhe 15 · P.O. Box yi 05 · ® (o 61 21) 56 53 82 (16) occurring physical, in particular thermal effects on the plastic of the Semi-finished product (10) equipped; and - The thermo-conditioning stations (14,17) are facilities to physical, especially thermal effects on the plastic of the semi-finished product (10) or moldings (18) and control device to previously defined, possibly programmable Control assigned to the action device. j 34.) Device according to claim 33, characterized in that. J ι that the thermal conditioning stations (14, 17) heating ι and cooling devices for the semi-finished product (10) or the moldings (18) with the possibility of regulating the temperature and includes heating or cooling time. 35.) Device according to claim 33 or 34, characterized shows that the first thermal conditioning station \ (14) a stretching device for the semi-finished product (10) with j Control option for stretching temperature, degree of stretching I. I and, if applicable, the stretching speed is assigned. j 36.) Device according to claim 35, characterized in that J that the stretching device for biaxial stretching of band-i shaped or tubular semi-finished product (10) i forms is. ! 130016/0096 Dipl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 · Bierstadter Höhe 15 · P.O. Box 51 05 · <g "(o 61 21) 56 53 37.) Device according to one of claims 33 to 36, characterized in that the stabilizing device (13) Devices for calendering and / or rolling a strip-shaped semi-finished product under Thickness reduction are assigned. 38.) Device according to one of claims 33 to 37, characterized in that the cooling devices provided in the stabilizing device (13) with Devices for generating a sequential effect on the plastic of the semi-finished product (10), adjustable temperature control. 39.) Device according to one of claims 33 to 38, characterized in that the thermoforming device (16) contains at least one molding tool with a mold surface that can be heated and cooled in an adjustable manner. 40.) Device according to one of claims 33 to 391 there- characterized in that the thermoforming device & (16) includes at least one molding tool with a Control device for generating a previously determinable, possibly programmable temperature change over time or temperature control during the thermoforming process is equipped on at least one mold surface. 130016/0096 Dlpl.-Phys. Heinrich Seids · Patent Attorney · 6200 Wiesbaden 1 ■ Bierstadter Höhe 15 · Postfach 51 05 · ξ? (Ο 6ι 21) 56 53 82 41.) Device according to one of claims 33 to 40, characterized in that the thermoforming device (16) contains at least one molding tool with means for producing a previously is equipped with a definable, controllable form pressure, 42.) Device according to claim 41, characterized in that the devices for generating the molding pressure with a control device for the controllable, possibly programmable, temporal variation of the form pressure are equipped during the thermoforming process. 'j 43.) Device according to one of claims 33 to 42, characterized in that the second thermal conditioning station (17) contains the thermoforming device (16) in its input area and extends beyond the exit of the thermoforming device (16). 44.) Device according to claim 43, characterized in that ι that the second thermal conditioning station (17) : 20 one connected to the output of the thermoforming device (16) subsequent pre-heat treatment! contains direction for the briquettes. 130016/0098