CA2555897C - Heating cylinder for attachment to an injection nozzle for an injection molding system - Google Patents
Heating cylinder for attachment to an injection nozzle for an injection molding system Download PDFInfo
- Publication number
- CA2555897C CA2555897C CA002555897A CA2555897A CA2555897C CA 2555897 C CA2555897 C CA 2555897C CA 002555897 A CA002555897 A CA 002555897A CA 2555897 A CA2555897 A CA 2555897A CA 2555897 C CA2555897 C CA 2555897C
- Authority
- CA
- Canada
- Prior art keywords
- heating
- heating cylinder
- molding system
- injection molding
- heat conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 88
- 238000002347 injection Methods 0.000 title claims abstract description 17
- 239000007924 injection Substances 0.000 title claims abstract description 17
- 238000001746 injection moulding Methods 0.000 title claims abstract description 14
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000000155 melt Substances 0.000 description 5
- 239000011295 pitch Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- HUWSZNZAROKDRZ-RRLWZMAJSA-N (3r,4r)-3-azaniumyl-5-[[(2s,3r)-1-[(2s)-2,3-dicarboxypyrrolidin-1-yl]-3-methyl-1-oxopentan-2-yl]amino]-5-oxo-4-sulfanylpentane-1-sulfonate Chemical compound OS(=O)(=O)CC[C@@H](N)[C@@H](S)C(=O)N[C@@H]([C@H](C)CC)C(=O)N1CCC(C(O)=O)[C@H]1C(O)=O HUWSZNZAROKDRZ-RRLWZMAJSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2743—Electrical heating element constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2754—Plurality of independent heating or cooling means, e.g. independently controlling the heating of several zones of the nozzle
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A hollow heating cylinder for attachment to an injection nozzle for an injection molding system. An elongated heating cartridge is spirally wound on the outside of the cylinder. The heating cartridge contains two electrically heatable heat conductors which are electrically separated from one another and are located in different regions in the longitudinal direction of the heating cartridge. One heat conductor is positioned for heating the mouth region of the nozzle and the other heat conductor is positioned for heating the shank region of the nozzle.
Description
HEATING CYLINDER FOR ATTACHMENT TO AN
INJECTION NOZZLE FOR AN INJECTION MOLDING SYSTEM
TECHNICAL FIELD
The present invention relates to heating cylinders for injection nozzles for injection molding systems.
BACKGROUND OF THE INVENTION
For understanding the problem underlying the present invention, reference is made to Figures 1 and 2 of the drawings. Figure 1 shows an injection molding system, in schematic representation. From an injection molding machine connected via a feed bushing 3, hot melt (i.e. molten plastic material) is conducted through the flow channels 4 of a heated hot-channel distribution block 2 to two or more nozzles 10. The injection nozzles 10 are positioned in accommodating bores 8 in the injection-side member 5A of the mold tool 6. The injection nozzles are connected via the so-called mouth (or orifices) 13 to cavities 7, in which the molded parts are formed and which are usually found in the ejection-side part of the too16.
There is a considerable difference between the required temperature of the melt and that of the tool. For example, the processing temperature of the melt can be 250 C, while the tool can have a temperature of 50 C. This temperature difference results in a considerable flow of heat away from the nozzles, especially at the points of contact between the nozzles and the tool. This heat loss must constantly be compensated by heating of the nozzles. This heating is effected by means of heating cylinders capable of being attached to the nozzles, to which the present invention relates. The most critical point with regard to the risk of overcooling of the melt is at the mouth 13, since here the heat-absorbing capacity of the surrounding nozzle material is small owing to the gradual reduction in the diameter of the nozzle and the fact that there is an intimate contact between the nozzle and the tool.
These conditions require that heating of the nozzle in the mouth region 12 must be greater than in the shank region 11. The heat supply required for this in the mouth region 12 is also heavily dependent upon the operating conditions, the material of the melt and the tool, and the shape of the mouth 13. In addition, the heat supply must be effectively controllable, since the range of the processing temperature of some melts is very narrow. In addition, in the cold state of the tool for example, a greater quantity of heat must be supplied to the mouth region 12.
It is already known that the nozzles may be equipped with two separate heating cylinders 20A, 20B, as shown, for example, in Figure 2, specifically, one for the mouth region 12 and one for the shank region 11. The heat conductors of the two heating cylinders are capable of being controlled and/or regulated independently of one another. The heating cylinders typically consist essentially of a hollow supporting cylinder, which is provided with a spiral groove for the accommodation of a heating cartridge, in which a heat conductor is embedded.
The pitch of the spiral groove on the supporting cylinder of the heating cylinder for the mouth region 12 is as a rule smaller than the pitch of the spiral groove on the supporting cylinder for the shank region 11. On the outside of the heating cylinder is found a protective metallic jacket 23. In Figure 2, in addition to the illustration of the nozzle, the accommodating bore 8 in the tool is also indicated.
One disadvantage of this known system is that two separate heating cylinders 20A, 20B are required. An additional disadvantage is that the electrical connection 34 of the heating cylinder 20A for the mouth region lies quite far in front in the direction of the mouth, so that a corresponding longitudinal groove 9 (Figure 2) must be provided for its accommodation in the bore 8 of the tool-injection-side member 5A. This necessity, apart from the additional expense, may in some tools also result in problems of space. Moreover, a considerable risk of damage to the electrical connection 34 exists upon introduction of the nozzles into the accommodating bores 8 of the tool. In Figure 2, reference numeral 35A
designates the electrical connection to the temperature sensor for the heating cylinder 20B. The corresponding temperature sensor for the heating cylinder is not shown.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an improved heating system for an injection machine nozzle.
The system according to the present invention utilizes only one heating cylinder instead of two separate heating cylinders as known in present systems.
With the present invention, an elongated heating cartridge is spirally wound on the outside of the hollow heating cylinder. The heating cartridge contains two electrically heatable heat conductors which are electrically separated from one another and are located in essentially different regions in the longitudinal direction of the heating cartridge. One heat conductor is positioned for heating the mouth (orifice) region of the nozzle, while the other is positioned for heating the shank region of the nozzle. Hence the electrical connection 34, which in the prior art projects radially outward in the mouth region from the cylindrical member of the heating cylinder in the mouth region, is eliminated. Consequently, the accommodating groove 9 for this connection in the nozzle-accommodating bore 8 of the tool may be omitted. In addition, the space requirement in the cable channel of the system is reduced, since only one ISO cable for two heating connections is required. With the present invention, considerable cost savings are achieved.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is to be described in detail with reference to the figures, wherein:
Figure 1 shows a sketch of an injection molding system according to the prior art.
Figure 2 depicts an injection nozzle with two separate heating cylinders according to the prior art.
Figure 3 depicts an injection nozzle with an exemplary embodiment of a heating cylinder according to the present invention.
Figure 4 illustrates an exemplary embodiment of a heating cartridge for a heating cylinder according to the present invention.
INJECTION NOZZLE FOR AN INJECTION MOLDING SYSTEM
TECHNICAL FIELD
The present invention relates to heating cylinders for injection nozzles for injection molding systems.
BACKGROUND OF THE INVENTION
For understanding the problem underlying the present invention, reference is made to Figures 1 and 2 of the drawings. Figure 1 shows an injection molding system, in schematic representation. From an injection molding machine connected via a feed bushing 3, hot melt (i.e. molten plastic material) is conducted through the flow channels 4 of a heated hot-channel distribution block 2 to two or more nozzles 10. The injection nozzles 10 are positioned in accommodating bores 8 in the injection-side member 5A of the mold tool 6. The injection nozzles are connected via the so-called mouth (or orifices) 13 to cavities 7, in which the molded parts are formed and which are usually found in the ejection-side part of the too16.
There is a considerable difference between the required temperature of the melt and that of the tool. For example, the processing temperature of the melt can be 250 C, while the tool can have a temperature of 50 C. This temperature difference results in a considerable flow of heat away from the nozzles, especially at the points of contact between the nozzles and the tool. This heat loss must constantly be compensated by heating of the nozzles. This heating is effected by means of heating cylinders capable of being attached to the nozzles, to which the present invention relates. The most critical point with regard to the risk of overcooling of the melt is at the mouth 13, since here the heat-absorbing capacity of the surrounding nozzle material is small owing to the gradual reduction in the diameter of the nozzle and the fact that there is an intimate contact between the nozzle and the tool.
These conditions require that heating of the nozzle in the mouth region 12 must be greater than in the shank region 11. The heat supply required for this in the mouth region 12 is also heavily dependent upon the operating conditions, the material of the melt and the tool, and the shape of the mouth 13. In addition, the heat supply must be effectively controllable, since the range of the processing temperature of some melts is very narrow. In addition, in the cold state of the tool for example, a greater quantity of heat must be supplied to the mouth region 12.
It is already known that the nozzles may be equipped with two separate heating cylinders 20A, 20B, as shown, for example, in Figure 2, specifically, one for the mouth region 12 and one for the shank region 11. The heat conductors of the two heating cylinders are capable of being controlled and/or regulated independently of one another. The heating cylinders typically consist essentially of a hollow supporting cylinder, which is provided with a spiral groove for the accommodation of a heating cartridge, in which a heat conductor is embedded.
The pitch of the spiral groove on the supporting cylinder of the heating cylinder for the mouth region 12 is as a rule smaller than the pitch of the spiral groove on the supporting cylinder for the shank region 11. On the outside of the heating cylinder is found a protective metallic jacket 23. In Figure 2, in addition to the illustration of the nozzle, the accommodating bore 8 in the tool is also indicated.
One disadvantage of this known system is that two separate heating cylinders 20A, 20B are required. An additional disadvantage is that the electrical connection 34 of the heating cylinder 20A for the mouth region lies quite far in front in the direction of the mouth, so that a corresponding longitudinal groove 9 (Figure 2) must be provided for its accommodation in the bore 8 of the tool-injection-side member 5A. This necessity, apart from the additional expense, may in some tools also result in problems of space. Moreover, a considerable risk of damage to the electrical connection 34 exists upon introduction of the nozzles into the accommodating bores 8 of the tool. In Figure 2, reference numeral 35A
designates the electrical connection to the temperature sensor for the heating cylinder 20B. The corresponding temperature sensor for the heating cylinder is not shown.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an improved heating system for an injection machine nozzle.
The system according to the present invention utilizes only one heating cylinder instead of two separate heating cylinders as known in present systems.
With the present invention, an elongated heating cartridge is spirally wound on the outside of the hollow heating cylinder. The heating cartridge contains two electrically heatable heat conductors which are electrically separated from one another and are located in essentially different regions in the longitudinal direction of the heating cartridge. One heat conductor is positioned for heating the mouth (orifice) region of the nozzle, while the other is positioned for heating the shank region of the nozzle. Hence the electrical connection 34, which in the prior art projects radially outward in the mouth region from the cylindrical member of the heating cylinder in the mouth region, is eliminated. Consequently, the accommodating groove 9 for this connection in the nozzle-accommodating bore 8 of the tool may be omitted. In addition, the space requirement in the cable channel of the system is reduced, since only one ISO cable for two heating connections is required. With the present invention, considerable cost savings are achieved.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is to be described in detail with reference to the figures, wherein:
Figure 1 shows a sketch of an injection molding system according to the prior art.
Figure 2 depicts an injection nozzle with two separate heating cylinders according to the prior art.
Figure 3 depicts an injection nozzle with an exemplary embodiment of a heating cylinder according to the present invention.
Figure 4 illustrates an exemplary embodiment of a heating cartridge for a heating cylinder according to the present invention.
Figure 5 illustrates an exempiary embodiment of a supporting cylinder for a heating cylinder according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An exemplary embodiment of a heating cartridge according to the present invention is shown in Figure 4. The cartridge 30 contains two heat conductors and 33, which are wound to form spiral heating coils. The heating coils are accommodated in a metal sleeve 31, in which they are embedded in a conventional electrically insulating compound 40. The heating coil 32 is in the front (tool-side) part Bl of the sleeve 31, while the heating coil 33, which is spatially and electrically separated from the heating coil 32, is in the remaining portion B2 of the sleeve 31. The electrical connections 34 and 35 of the two heating coils are carried out of the metal sleeve 31 at the end opposite to the heating coil 32.
The heating cartridge 30 is long as compared with its diameter, which is not readily apparent in Figure 4, which shows the structure of the heating cartridge only schematically. In practice, the cartridge 30 resembles a long plastically deformable rod or wire and is wound on a hollow supporting cylinder, such as exemplary cylinder 21 shown in Figure 5. For guidance of the heating cartridge to be wound, the outside of the supporting cylinder 21 is provided with a spiral groove 22, which in its mouth-side region B 1 has a significantly smaller pitch than in its shank region B2. The lengths of the heating coils 32, 33 are adjusted to the supporting cylinder such that the windings of the spiral groove 22, lying close together in the mouth region B 1, are substantially received by the heating coil 32, and the windings of the spiral groove 22 in the shank region B2, provided with a greater pitch, are substantially received by the heating coil 33. The connections 34 and 35 of the two heating coils are carried out of the heating cylinder 20 at A
(Figure 5). Radially outside the supporting cylinder 21, provided with the heating cartridge 30, is positioned a protective jacket 23, not represented in Figure 5 but indicated in Figure 3.
Figure 3 shows an injection nozzle 100 to which the hollow heating cylinder 20 according to the invention is attached. It can be seen that the complete injection nozzle 100 does not have any parts projecting radially along its entire length, as does the known injection nozzle 10 of Figure 2. It can in addition be seen that the indicated accommodating bore 8 of the tool does not need the groove 9 (see Figure 2) as required in the prior art. The electrical connections 34, 35 of the two heating coils are at the end of the nozzle turned away from the tool, and are outside the accommodating bore 8. The thin connecting lines for the temperature sensors in the mouth region and in the shank region lie, respectively, in a small longitudinal grooves 24 and 25 in the protective jacket 23, owing to which there is no expansion in the radial direction.
Heating, as in the prior art, may be controlled or regulated separately in the mouth region and in the shank region of the nozzle. The greater thickness of the windings of the heating cartridge 30 on the supporting cylinder 21 in the mouth region B I is preferably but is not a requirement of the present invention, However, it is advantageous, since if similar pitches in both regions are utilized, the current-carrying capacity of the heating coil 32 would have to be higher than that of the heating coil 33, with the consequence that the heating coils in both regions would have to be dimensioned electrically unlike.
While various embodiments of the invention have been shown and described, numerous variations and alternate embodiments will occur to those skilled in the art. Accordingly, it is intended that the invention be limited only in terms of the appended claims.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An exemplary embodiment of a heating cartridge according to the present invention is shown in Figure 4. The cartridge 30 contains two heat conductors and 33, which are wound to form spiral heating coils. The heating coils are accommodated in a metal sleeve 31, in which they are embedded in a conventional electrically insulating compound 40. The heating coil 32 is in the front (tool-side) part Bl of the sleeve 31, while the heating coil 33, which is spatially and electrically separated from the heating coil 32, is in the remaining portion B2 of the sleeve 31. The electrical connections 34 and 35 of the two heating coils are carried out of the metal sleeve 31 at the end opposite to the heating coil 32.
The heating cartridge 30 is long as compared with its diameter, which is not readily apparent in Figure 4, which shows the structure of the heating cartridge only schematically. In practice, the cartridge 30 resembles a long plastically deformable rod or wire and is wound on a hollow supporting cylinder, such as exemplary cylinder 21 shown in Figure 5. For guidance of the heating cartridge to be wound, the outside of the supporting cylinder 21 is provided with a spiral groove 22, which in its mouth-side region B 1 has a significantly smaller pitch than in its shank region B2. The lengths of the heating coils 32, 33 are adjusted to the supporting cylinder such that the windings of the spiral groove 22, lying close together in the mouth region B 1, are substantially received by the heating coil 32, and the windings of the spiral groove 22 in the shank region B2, provided with a greater pitch, are substantially received by the heating coil 33. The connections 34 and 35 of the two heating coils are carried out of the heating cylinder 20 at A
(Figure 5). Radially outside the supporting cylinder 21, provided with the heating cartridge 30, is positioned a protective jacket 23, not represented in Figure 5 but indicated in Figure 3.
Figure 3 shows an injection nozzle 100 to which the hollow heating cylinder 20 according to the invention is attached. It can be seen that the complete injection nozzle 100 does not have any parts projecting radially along its entire length, as does the known injection nozzle 10 of Figure 2. It can in addition be seen that the indicated accommodating bore 8 of the tool does not need the groove 9 (see Figure 2) as required in the prior art. The electrical connections 34, 35 of the two heating coils are at the end of the nozzle turned away from the tool, and are outside the accommodating bore 8. The thin connecting lines for the temperature sensors in the mouth region and in the shank region lie, respectively, in a small longitudinal grooves 24 and 25 in the protective jacket 23, owing to which there is no expansion in the radial direction.
Heating, as in the prior art, may be controlled or regulated separately in the mouth region and in the shank region of the nozzle. The greater thickness of the windings of the heating cartridge 30 on the supporting cylinder 21 in the mouth region B I is preferably but is not a requirement of the present invention, However, it is advantageous, since if similar pitches in both regions are utilized, the current-carrying capacity of the heating coil 32 would have to be higher than that of the heating coil 33, with the consequence that the heating coils in both regions would have to be dimensioned electrically unlike.
While various embodiments of the invention have been shown and described, numerous variations and alternate embodiments will occur to those skilled in the art. Accordingly, it is intended that the invention be limited only in terms of the appended claims.
Claims (13)
1. A hollow heating cylinder for attachment to an injection nozzle for an injection molding system, the heating cylinder having an elongated heating cartridge wound spirally around the outside thereof, said heating cartridge having a first and a second electrically heatable heat conductor, said heat conductors being electrically separated from one another and being located in substantially different regions in the longitudinal direction of said heating cartridge, said first heat conductor being positioned for heating the mouth region of an injection nozzle and said second heat conductor being positioned for heating the shank region of an injection nozzle.
2. The hollow heating cylinder according to Claim 1, wherein said first and second heat conductors have electrical connections which are positioned at the end of the heating cartridge opposite to said first heat conductor.
3. The hollow heating cylinder according to Claim 1 wherein said heat conductors comprise spiral heating coils.
4. The heating cylinder according to Claim 1 wherein said heating cartridge is positioned in a spiral groove on the outside surface of said heating cylinder.
5. The heating cylinder according to Claim 4, wherein said spiral groove in the region adjacent said first heat conductor has a smaller pitch than in the remaining region.
6. The heating cylinder according to Claim 1 further comprising an outer protective jacket surrounding said heating cylinder.
7. The heating cylinder according to claim 6 further comprising longitudinal grooves in said protective jacket for positioning temperature sensors for the mouth and shank regions of the nozzles.
8. An injection molding system comprising at least one mold tool and at least one injection nozzle, the improvement comprising a hollow heating cylinder positioned on said injection nozzle, said hollow heating cylinder having a body member and an elongated heating cartridge spirally would around said body member, said heating cartridge having a first heat conductor and a second heat conductor positioned therein, said first and second heat conductors located in different regions in the longitudinal direction of said body member.
9. The injection molding system according to claim 8 wherein said body member has a spiral groove on the outer surface and said elongated heating cartridge is positioned on said spiral groove.
10. The injection molding system according to claim 9 wherein said spiral groove has a first pitch for positioning of said first heat conductor and a second pitch different than said first pitch for positioning of said second heat conductor.
11. The injection molding system according to claim 9 wherein said first and second heat conductors each comprise spiral heating coils.
12. The injection molding system according to claim 8 further comprising a jacket member positioned over said hollow heating cylinder.
13. The injection molding system according to claim 12 further comprising temperature sensor members positioned in said jacket member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002555897A CA2555897C (en) | 2006-08-08 | 2006-08-08 | Heating cylinder for attachment to an injection nozzle for an injection molding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002555897A CA2555897C (en) | 2006-08-08 | 2006-08-08 | Heating cylinder for attachment to an injection nozzle for an injection molding system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2555897A1 CA2555897A1 (en) | 2008-02-08 |
| CA2555897C true CA2555897C (en) | 2010-02-02 |
Family
ID=39030931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002555897A Active CA2555897C (en) | 2006-08-08 | 2006-08-08 | Heating cylinder for attachment to an injection nozzle for an injection molding system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2555897C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11136868B1 (en) * | 2020-09-03 | 2021-10-05 | Saudi Arabian Oil Company | Aqueous flash treatment in well applications |
-
2006
- 2006-08-08 CA CA002555897A patent/CA2555897C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2555897A1 (en) | 2008-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |