CN85104434A - Cap preparation method and device - Google Patents

Abstract

The method and apparatus that the Can container end cap is made or made again, be contained in having on the press: the drift core of collision block and the die center on the baffle plate in ining succession, connect first pressing means of outer collision block and be positioned at die center ring relative on the template, the drift shell is arranged on the interior collision block with pressing means.Pressing means is withstood on material on the ring by hydraulic pressure, and shell is moved material to the dock seal head that forms end cap on the ring, there is second pressing means to hold in the mouth mutually with ring on the template because of case pres-sure, when the drift core during to the final position material can be loosely held between the ring and first member, can be hauled then and walk around the minimum part in arc footpath and form firm dock seal head.

Description

Cap preparation method and device

The present invention is substantially about manufacturing container end epicranial plate or " cap " two terminations for two formula containers of sealing, and especially about a kind of modification method and mechanical device, be in drawing the double wall zone, to form a kind of more sharp-pointed arc footpath, can use thin material to form same for this reason or even better termination anchor intensity.The present invention can promptly directly give to tighten and form by the arc that will draw double wall in order to " making again " local cap of making, and perhaps makes this kind cap by flat metal material fully.

Canister or can are well-known in the world, and this kind container is mainly used in food and beverage, also can be used in other product certainly.

At present, the common vessel of this kind general aspects belongs to " two " formula.Comprising the container body of an integral body and container end epicranial plate or " cap ", this cap is to be added in after material is inserted container at last above the opening termination of can.These two assemblies generally are to stretch and stretch again and finally shaped by flat metal material.

Can see various termination cover plate and conventional method and the mechanical device of manufacturing this kind cover plate in many United States Patent (USP)s, for example be No. the 4348464th, Khuory United States Patent (USP); No. the 4345696th, the United States Patent (USP) of Guimarin; People's such as Dalli United States Patent (USP) the 4305523rd; No. the 4291567th, the United States Patent (USP) of Murayama; No. the 4244315th, the United States Patent (USP) of Klein; No. the 4215795th, the United States Patent (USP) of Elser; No. the 4213324th, people's such as Kelley United States Patent (USP); No. the 4192244th, people's such as Kelley United States Patent (USP); No. the 4183445th, the United States Patent (USP) of La Cross; No. the 4119050th, the United States Patent (USP) of Klein; No. the 4093102nd, the United States Patent (USP) of Kraska; And No. the 4031837th, the United States Patent (USP) of Jordan.This kind technology is the representative of manufacturing many distinct methods of cap.

According to rule, as can be seen, the material of being adorned in the container of making so often loads under pressure.For example, a typical container for drink must can be withstood the pressure about 90Psi and be unlikely warping phenomenon, and warpage is defined as at least drawing on the double wall face part by it and is connected part with the container body and the phenomenon of sticking up out up inwardly.For obtaining a kind of safe and effective container, two parts of this container (be body and cap, each the thinnest part must have full intensity and thickness for inside can withstanding the internal pressure of dress material maximum, and can avoid warping phenomenon.

Up to now, relevant main difficulty source all is to be stamped the pass with vessel shell, and this kind cap has a lot of different each several part profiles through manufacturing, so that it can be made and at cylindrical shape body top seal by joint once.The each several part profile of this cap comprises zone, various arc footpath.In general, it also meets some difficulties, promptly is: when in the stretching operation, zone, this kind arc footpath can attenuation when metal is stretched or is upheld.

Finding in most of previous patents a kind ofly to have metal than the weight-normality lattice to compensate this kind phenomenon than the required person of other situations by using, and it can have thickness sufficient in each zone, arc footpath in the product of finishing be to withstand above mentioned internal pressure.

Narrate according to another kind of mode, because each has the zone in arc footpath can attenuation trend largely be arranged than the flat part of termination cover plate usually, its result, this kind part of last gained cap usually can be thicker than needed.In fact, this is a kind of excessive compensating action, and it can cause the waste of material.This is a kind of important disadvantages, because make in the mode of a large amount of manufacturings at the container of usual this pattern, can understand, and the saving of any metal is multiplied by the total number of container, can make cost that very big saving is arranged.

Have now found that have some these type of difficulties can be by means of a kind of mechanical device being provided and a kind ofly operating the method for this mechanical device and overcome, wherein raw-material thickness can greatly reduce and be unlikely the intensity of sacrificing cap.

Thereby, the present invention has a main purpose to provide a kind of method and mechanical device for manufacturing cap, wherein the each several part profile makes its each arc directly try one's best little or tighten and be unlikely the intensity that anchors of product that influence finishes at last, and also being unlikely needs to increase the situation of raw-material thickness with compensation attenuation in manufacturing process.

Have now found that this purpose must be finished by a kind of mechanical device is provided, the length that wherein will draw the double wall face excessively stretches, and some material in the excessive stretch zones is drawn within the central plate of cap afterwards.Through finding, the difficulty generation of using the mechanical device of this kind pattern to be unlikely with arc footpath that method for production can produce extreme deflation usually when forming the sharp arc footpath of pole tip, to have of for example breaking and so on.This kind breaks and runs into when situation and shearing can directly form at the spoke that the utmost point tightens usually, is exactly that the world is known, and can causes overcompensation effect mentioned above.

Therefore, modification method and the mechanical device of making a kind of cap of the container that the above characteristic arranged are main purposes of the present invention, other purposes of the present invention can read following make a summary and with reference to each accompanying drawing do explain the main points briefly the time can understand more.

Each figure explanation

Fig. 1 is an interarea sectional drawing, wherein shows the instrument that two percussion hammers is become the bottom center resting position.

Fig. 2 to 9 is some local interarea schematic diagrames, shows at the various diverse locations of manufacturing and manufacture again instrument in the process.

Figure 10 is an interarea sectional drawing, shows a kind of changing form of the present invention, and instrument wherein is on the bottom center resting position for two percussion hammers.

Figure 11 is a local interarea figure of concrete mould example among Figure 10, shows the situation after the termination cover plate forms and after inner percussion hammer lifts.

Figure 12 is a timing diagram.

As mentioned above, instrument of the present invention is among the squeezer that is used for a kind of double action, therefore, shows an inner percussion hammer 10 and an outside percussion hammer 12 among Fig. 1.This squeezer does not add description in detail, because this kind squeezer is such as being that the world is well-known in No. 3902347 illustrated of United States Patent (USP) of Ridgway.Yet in brief, the squeezer of this kind double action pattern can be controlled it exactly and pay the operation that the instrument established is done with various different modes in the above in the squeeze job circulation of an appointment.

Please see Figure 1 for describing this mechanical device, find out that at first Fig. 1 shows the instrument on the bottom center resting position, slightly similar to the position of each assembly of being illustrated with the larger proportion size among Fig. 4.

Please see Figure 1 again, can notice, pay above the inner percussion hammer 10 and establishing a central drift pillar 30, this pillar only shows one piece in the drawings by some screw 30a() and be fixed on it is moved together.Have a drift heart 31 to be tied end at this central authorities' drift pillar 30 by screw 30b, this drift heart and this pillar separate by common drift heart spacer 32.

Paid by outside percussion hammer 12 and to establish a compressive sleeve and hold and decide device 42 and one and borrow some suitable screws 51 to be fixed in this to hold the drift shell of deciding above the device 42 50.

Please referring to Fig. 1, bottom platen 60 is paid above the apical margin at it and is being established a support loop 61 again, and this ring is fixed on above pressing plate 60 by some screw 61a.At these support loop 61 tops a blank cut edge 70 is installed, this edge makes its stationary positioned by some screws 71 again.

Holding certain second pressing element or sleeve 80 in support loop 61 and 71 inside, cut edge, this sleeve is usually by as the suitable fluid pressure of hydraulic pressure or air pressure and so on and towards the top position of squeezer or top and roof pressure.Certainly, because Fig. 1 shows instrument on the bottom center resting position, and sleeve 80 shows on " below " position.

Holding a punch die thimble circle 92 more inside at compressive sleeve 80 in this sleeve inner concentric, this ring similarly with usual mode by means of fluid pressure roof pressure up, this will do more detailed description hereinafter.At this, air is comparatively ideal medium, though other fluid also can use.Have a top base member 100 to do the installation of concentric type again more inside, this member also is to borrow the fluid actuating, more inside, is that a punch die heart harbors that mould 90 and one borrow screw 91a and fixed thereon the punch die heart 91.This kind member is fixed on above the bottom platen 60 and can not moves in operation.

Again please referring to Fig. 1, and with particular reference to mould thimble circle 92, as can be seen, this ring lies in above the piston rod 95, and this piston rod is again by certain first supporting piston 93 and certain second supporting piston 94 and supported.This member is usually by the fluid pressure roof pressure that makes progress, until till the big strength that this roof pressure strength is moved down overcomes.This will be described with reference to the operation of this mechanical device again.

Yet forward Fig. 2 to 9 to, for describing the operational scenario of this mechanical device of the present invention shown in Fig. 1 and instrument in detail, at first must suppose, as illustrating among Fig. 2, the blanking operation by drift shell 50 downward moving with blank cut edge 70 and joint operation finished.

Fig. 2 shows the situation of manufacturing an inverted cup C after the blanking operation.In the figure, the nose of punch 31 and drift shell 50 move down according to the indicated direction of arrow among the figure, and this is also shown in the timing diagram of Figure 12.At this moment, first compressive sleeve 40, can fixedly withstand on this metal above the punch die thimble circle 92 that is supported by piston 93 and 94 under the applied pressure via the hole 20a above the piston 41.The downward mobile meeting of this drift shell 50 is moved material above the arc footpath 50a of the arc footpath 92a of punch die thimble circle 92 and drift shell 50 to, can understand, and its periphery is fixed in the middle of this drift shell 50 and second compressive sleeve 80.Its result can cause " inversion " shown in Fig. 2 cup C.

In Fig. 3, there is the drift heart 31 to continue its moving down, and lip limit L is stretched downwards, and form and draw double wall face zone C W.As can be seen, this drift shell 50 continues down with second compressive sleeve, 80 downward roof pressures, and the lip limit height of the plate of joint is fixed.Have, top base member 100 is by the drift heart 31 roof pressure down again.Punch die thimble circle 92 has almost arrived below at this moment, because be overcome by piston 93 and 94 added pressure, and flange 201 has in fact been walked around arc footpath 92 ' b and formed the double wall face of drawing.As can be seen, this draws double wall face CW is " length is excessive " at this moment, and its purpose will be in hereinafter being described, and in fact, at this moment this cap or termination cover plate have excessively been stretched.

Then forward Fig. 4 to, as can be seen, drift shell 50 and second compressive sleeve 80 still down the aspect move the situation of punch die thimble circle 92 for example.Special with regard to this reference diagram 1, can notice that punch die thimble circle 92 and second compressive sleeve 80 can be done mechanical linking at this moment.Thereby, when drift shell 50 with second compressive sleeve 80 down during roof pressure, this sleeve 80 can drive punch die thimble circle 92 together, and first compressive sleeve 40 is just being followed it.This can make almost do not have above the metal between punch die thimble circle 92 and first compressive sleeve 40 or do not hold level pressure power or tension force at all.This can be avoided walking around the problem that a sharp-pointed arc can run into directly the time through general the stretching with the powerful level pressure power of holding of being everlasting.This kind situation moves and takes place during near bottommost towards the bottom center resting position at the drift heart 31.Then can effectively make the length of drawing double wall face CW shorten its last size at this moment, and in fact the material of be stretched as can be seen the arc footpath 92b that walks around punch die thimble circle 92 and the footpath of the arc on the drift heart 31 31a can form the central plate CP of this cap and the reinforcement groove G of formation ring-type.

Can notice that at this in fact drift heart 31 will not arrive bottommost on the drift heart 91.Thereby if when running into a kind of situation of lamination, this instrument can protect it to avoid damaged.

Now, can notice please referring to Fig. 5, the central static place bottom drift shell 50 and second compressive sleeve 80 are positioned in the figure, the drift heart 31 then begins its mobile (asking for an interview Figure 12) of making progress along inner percussion hammer 10.

Fig. 6 shows the position that drift is externally held instrument when deciding device 20 and having begun upwards, and can find out that also the drift heart 31 has begun withdrawal.Second compressive sleeve 80 and drift shell 50 can begin upwards because of it is no longer headed on downwards by drift shell 50 again.At the same time, top base ring 100 is its moving of making progress of beginning under fluid pressure also, because it no longer by the drift heart 31 downward roof pressures.

What Fig. 7 and 8 expressions moved upward proceeds, can understand at this, in such cases, two inner percussion hammers with and the drift that links hold and decide device and all move up unceasingly, and top base ring 100 also continues to move on its direction that makes progress, for example shown in the arrow of each figure.

Fig. 9 representational tool the drift heart 31 and first compressive sleeve 40 and drift shell 50 fully by lift from the time the fully open position, this is enough to make cap C to be given rise on the punch die line to by taking off or be transferred to the next stop above the squeezer by top base ring 100 at least.

Can understand from the above mentioned, the height of lip limit L is put on the operation level shown in Fig. 3 at first, and can not change in the operation afterwards can be not disturbed yet.Yet importantly, example as mentioned before, last size regularly is longer than in the initialization in Fig. 3 of the length of drawing double wall face CW slightly.This can be accumulated the other material in should the zone it, and just as mentioned before, in fact this kind material can be moved to downwards among the median plate sheet CP and form this plate.Yet consequently, thickness last in drawing double wall face zone can maintain desired specifications, and in fact do not have when being subjected to stretching action as this zone the attenuation situation that can produce.

It can also be seen that this kind operation can be avoided the pressing mold impression of lip limit L.By spurring rather than be stretching in the material of drawing in the double wall face zone, can on the point that destroys easily, apply light pressure on the L of lip limit.This can be avoided that any indentation or pressing mold impression are arranged on the lip limit, this kind situation is important, because if there is the pressing mold impression on this lip limit or indentation is arranged, can break in its joint operation afterwards.

Can understand again, the arc footpath of annular recess G can be tightened as far as possible.Though in fact certain restriction that tightened for how to form this kind arc footpath in a stretching operation does not have any restriction for arc sharpness directly when cap is made according to this kind mode in this kind zone.In fact, this kind arc footpath can be very sharp-pointed and make the metal that forms groove G two offsides where necessary and when the special cases of the cap of so making needs, form the contact condition of metal to metal.

Believe and to understand that though a kind of " manufacturing again " operation is described by this system, it can be used in a kind of operation of manufacturing equally, though wherein do not have base and forming operation.

Please refer to Figure 10 and 11, one of the present invention changes form shown in it, as can be seen, each basic module of this structure is identical, only except different in order to the mechanical device of control punch die thimble circle, and wherein all identical with interior number in poke 100, unless instrument changes to some extent.

Thereby as can be seen, an inner percussion hammer is being established 130, one drift hearts of drift central authorities' pillar spacer 132 for 110 pairs, and a drift heart 131.

Outside drift is held and is decided 120 pairs of devices and establishing compressive sleeve 140 and compressive sleeve piston 141.It is paid again and is establishing compressive sleeve and hold and decide device 142, drift shell clip 151, and drift shell 150.

The pressing plate of bottom is being established 170, the second compressive sleeves 180 in cut edge for 160 pairs, and punch die thimble circle 192 and top base member 200.

In Fig. 1, punch die thimble circle 92 is supported by pole 92, and this pole is supported by the piston 93 and 94 that fluid is operated again.Yet, in this form of the present invention, do not allow punch die thimble circle 192 and piston pole 195 also have piston to be supported, but allow piston 193 be supported by cam 196 by fluid pressure.Have, the fluid pressure of the sort of form of the present invention is similar shown in the effect of cam 196 and Fig. 1 to 9 again, usually can be with punch die thimble circle towards the top position and roof pressure when full diameter position 196a contacts with piston 193.Yet, when this cam rotates, and on its rotation path, move and when less diameter position 196b was contacted with piston 193, pole 195 and punch die thimble circle 192 all can descend at this cam.This kind situation can be coincide through regularly making itself and compressive sleeve 140 downward moving, mention once more at this, (see figure 4) in this kind operation of this mechanical device, not holding level pressure power less or at all extremely is added on above the metal, thereby this metal can be pulled and walk around the arc footpath that the utmost point tightens, make to have at least certain part can be pulled in the middle body of cap at long this metal of drawing in the double wall face.

Thereafter can implement in the variant of Figure 10 and 11 at each operation level shown in Fig. 2 to 9, its main difference is that cam 196 replaces fluid pressure as a kind of setting of supporting punch die thimble circle.

Errata

Claims (13)

1, a kind of method of manufacturing a container end epicranial plate by certain laminar material, just by metal being given blanking and being stretched within the squeezer and making, the method is characterized in that: an inverted cup is given blanking and stretched, simultaneously its periphery edge is fixed under pressure; The lip limit of this terminal cover plate is stretched and formed a kind of long double wall face of drawing; And unclasp and hold level pressure power and metal is moved within the central plate of termination cover plate by drawing the double wall face, form this arc of drawing double wall face footpath simultaneously.

2, method according to claim 1, the wherein above-mentioned level pressure power of holding applies by the pressue device that is given actuating by fluid, the punch die thimble circle joint operation of this device and an opposition, this punch die thimble circle and this pressue device in the end can move to unclasping the level pressure power of holding in a step together.

3, method according to claim 2, wherein above-mentioned punch die thimble circle are normally by fluid pressure and towards above-mentioned pressue device and roof pressure.

4, method according to claim 2, wherein above-mentioned punch die thimble circle are normally by a device that is subjected to the cam actuating and towards above-mentioned pressue device roof pressure.

5, a kind ofly contain a periphery edge within the squeezer of a double action, manufacturing by a kind of laminar material, a mechanical device of drawing the container end epicranial plate of a double wall face and a central plate, this squeezer contains movable inside and outside percussion hammer, and this mechanical device is characterised in that: have a drift 15 and a fixing drift heart to be arranged to relation in opposition to each other; There are certain first pressue device and a punch die thimble circle to be arranged to relation in opposition to each other; This first pressue device can carry this termination cover plate usually and be against this above punch die thimble circle; There are some devices to reduce in this level pressure power of holding above cover plate of termination for this first pressue device and this punch die thimble circle are moved together.

6, mechanical device according to claim 5, wherein above-mentioned punch die thimble circle are usually by towards above-mentioned first pressue device and roof pressure; There is a drift shell being carried and becomes relation in opposition to each other with certain second compressive sleeve by outside percussion hammer; This second compressive sleeve can be connected this punch die thimble circle along with moving of this drift shell, makes this punch die thimble circle move with above-mentioned first pressue device.

7, mechanical device according to claim 6, wherein above-mentioned punch die thimble circle usually by fluid pressure towards above-mentioned first pressue device and roof pressure.

8, mechanical device according to claim 6, wherein above-mentioned punch die thimble circle usually by a device that is subjected to the cam actuating towards above-mentioned first pressue device and roof pressure.

9, manufacture one for the double action squeezer the inside that has some movable inside and an outside percussion hammer and a fixation clip at by a kind of chip material a certain periphery edge is arranged, some mechanical devices of drawing the container end epicranial plate of double wall face and some central plates is characterized in that: have a drift heart to be carried on this above percussion hammer of inside; There is a punch die heart to be carried on this and becomes relation in opposition to each other with this drift heart above pressing plate; There is certain first compressive sleeve system to be paid and is located at this above percussion hammer of outside; There is a punch die thimble circle to be supported on this pressing plate and becomes relation in opposition to each other with above-mentioned compressive sleeve system; Having a drift shell to be paid is located at above the inner percussion hammer; There is certain second compressive sleeve device to be paid to be located at above the pressing plate and becomes the relation that opposes mutually with above-mentioned drift shell; There is a top base piston that is subjected to the fluid actuating being carried and becomes relation in opposition to each other with this drift heart by pressing plate, and round the above-mentioned punch die heart; Above-mentioned first compressive sleeve system above-mentioned material is being carried and at roof pressure under the fluid pressure on above-mentioned mould thimble circle; Above-mentioned drift shell with this material be stretched to this above punch die thimble circle and externally percussion hammer when pressing plate moves, can make itself and above-mentioned punch die thimble circle do mechanical the linking above-mentioned second downward roof pressure of compressive sleeve, the above-mentioned drift heart at inner percussion hammer when pressing plate moves, can be with above-mentioned top base piston roof pressure and on the cover plate of termination, form the double wall face of drawing down; Above-mentioned again second compressive sleeve device, above-mentioned first compressive sleeve system, and above-mentioned punch die thimble circle can move when this drift heart is stretched out the position near it together.

10, mechanical device according to claim 9, wherein above-mentioned punch die thimble circle usually can be towards above-mentioned first compressive sleeve systems under fluid pressure and roof pressure.

11, mechanical device according to claim 9, wherein above-mentioned punch die thimble circle are usually by a device that is subjected to the cam actuating and towards above-mentioned first compressive sleeve system and roof pressure.

12, manufacture the method for a container end epicranial plate by certain laminar material for one, be actually with reference to above-mentioned diagram and describe.

13, the mechanical device of the container end epicranial plate of a central plate is actually with reference to above-mentioned diagram and describes.

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