WO1996026064B1 - Self-contained molding apparatus and method of use - Google Patents
Self-contained molding apparatus and method of useInfo
- Publication number
- WO1996026064B1 WO1996026064B1 PCT/US1996/002339 US9602339W WO9626064B1 WO 1996026064 B1 WO1996026064 B1 WO 1996026064B1 US 9602339 W US9602339 W US 9602339W WO 9626064 B1 WO9626064 B1 WO 9626064B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold section
- pressure
- transfer plate
- molding apparatus
- plastic injection
- Prior art date
Links
- 238000000465 moulding Methods 0.000 title claims abstract 11
- 238000002347 injection Methods 0.000 claims abstract 7
- 239000007924 injection Substances 0.000 claims abstract 7
- 238000001746 injection moulding Methods 0.000 claims 30
- 239000000463 material Substances 0.000 claims 6
- 238000003780 insertion Methods 0.000 claims 3
- 230000001808 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000003825 pressing Methods 0.000 claims 2
- 230000000153 supplemental Effects 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
Abstract
A method and apparatus for clamping a plastic injection mold. The apparatus utilizes leader pins (26a-26d) connected directly to a pair of mold sections (14, 20). By directly connecting the leader pins to the mold sections, standard platens and housings can be eliminated, thereby reducing the overall weight and dimensions of the apparatus. An ejection assembly (66) and runner assembly (64) are bolted onto the mold sections, but are not subjected to clamping pressures during the molding process. Since these assemblies are not subject to clamping pressures, the standard housings usually provided on these assemblies may also be eliminated.
Claims
1. A plastic injection molding apparatus for molding a plastic artiple, comprising:
(a) leader pins;
(b) a first mold section directly secured to said leader pins;
(c) a second mold section directly coupled to said leader pins, said second mold section forming a parting line and a mold cavity with said first mold section when moved into sealed engagement with said first mold section; and
(d) a pressure actuator capable of applying sufficient pressure to said second mold section to clamp said second mold section into sealed engagement with said first mold section, wherein said pressure actuator is slidable into a position proximate to said second mold section.
2. The plastic injection molding apparatus of claim 1, wherein said leader pins interconnect by said first mold section and said second mold section.
3. The plastic injection molding apparatus of claim 1, wherein said first mold section is directly secured to said leader pins
23 in a manner which maintains said leader pins in a predetermined orientation relative to one another.
4. The plastic injection molding apparatus of claim 1, wherein said parting line surrounds said leader pins when said second mold section is moved into sealed engagement with said first mold section.
5. The plastic injection molding apparatus of claim 4, wherein said pressure actuator is a hydraulic linear actuator.
6. The plastic injection molding apparatus of claim 5, further comprising a pressure arm secured to said second mold section, said pressure arm being capable of transferring force to said second mold section from said hydraulic linear actuator.
7. The plastic injection molding apparatus of claim 6, further comprising a pressure transfer plate secured to said leader pins, wherein said pressure transfer plate is provided with an aperture capable of receiving said pressure arm, and wherein said second mold section is between said first mold section and said pressure transfer plate.
8. The plastic injection molding apparatus of claim 7, wherein said leader pins interconnect said first mold section and said pressure transfer plate.
9. The plastic injection molding apparatus of claim 7, further comprising a track secured to said pressure transfer plate and slidably coupled to said hydraulic linear actuator in a manner which allows said hydraulic linear actuator to slide into and out of said position between said pressure transfer plate and said second mold section.
10. The plastic injection molding apparatus of claim 9, further comprising a supplemental hydraulic linear actuator secured to said hydraulic linear actuator and being capable of sliding said hydraulic linear actuator into and out of said position between said pressure transfer plate and said second mold section.
25
1 1. The molding apparatus of claim 9, further comprising means secured to said pressure transfer plate and said second mold section for moving said pressure arm a sufficient distance from said pressure transfer plate to allow said hydraulic linear actuator to be moved into a position between said pressure arm and said pressure transfer plate.
12. The molding apparatus of claim 11, wherein said pressure arm moving means is a long stroke hydraulic cylinder.
13. The plastic injection molding apparatus of claim 1, further comprising an ejection assembly secured to a portion of said second mold section which is not subject to clamping forces during clamping of said second mold section into sealed engagement with said first mold section.
14. The plastic injection molding apparatus of claim 1, further comprising a runner assembly secured to a portion of said first mold section which is not subject to clamping forces during clamping of said second mold section into sealed engagement with said first mold section.
26
15. A plastic injection molding apparatus for molding a plastic article, comprising:
(a) leader pins;
(b) a one-piece first mold section directly secured to said leader pins in a manner which maintains said leader pins in a predetermined orientation relative to one another;
(c) a pressure transfer plate secured to said leader pins, said pressure transfer plate being provided with an aperture;
(d) a one-piece second mold section directly and slidably coupled to said leader pins, said second mold section forming a parting line and a mold cavity with said first mold section when moved into sealed engagement with said first mold section;
(e) a pressure arm secured to said second mold section, said pressure arm being of a diameter sufficient to allow said pressure arm to pass through said aperture provided in said pressure transfer plate;
(f) a track secured to said pressure transfer plate;
(g) a pressure actuator slidably coupled to said track, said pressure actuator having a dimension sufficiently narrow to allow said pressure actuator to slide into a position between said pressure arm and said pressure transfer plate, wherein said pressure actuator covers said aperture provided in said pressure transfer plate.
27
16. The molding apparatus of claim 15, wherein said pressure actuator is a hydraulic linear actuator.
17. The molding apparatus of claim 15, further comprising means secured to said pressure transfer plate and said second mold section for moving said pressure arm a sufficient distance from said pressure transfer plate to allow said pressure actuator to be moved into a position between said pressure arm and said pressure transfer plate.
18. The molding apparatus of claim 17, wherein said pressure arm moving means is a long stroke hydraulic cylinder.
19. The plastic injection molding apparatus of claim 15, further comprising an ejection assembly secured to a portion of said second mold section which is not subject to clamping forces during clamping of said second mold section into sealed engagement with said first mold section.
28
20. The plastic injection molding apparatus of claim 15, further comprising a runner assembly secured to a portion of said first mold section which is not subject to clamping forces during clamping of said second mold section into sealed engagement with said first mold section.
21. A method for applying clamping pressure to a plastic injection mold unit comprising:
(a) providing a first mold section;
(b) providing a second mold section which when moved into sealed engagement with said first mold section forms a mold cavity;
(c) providing a pressure actuator sufficient to seal said second mold section into engagement with said first mold section;
(d) providing leader pins directly secured to said first mold section and directly coupled to said second mold section;
(e) applying sufficient pressure to said second mold section with said pressure actuator to clamp said second mold section into sealed engagement with said first mold section;
(f) injecting a plastic injection material into said mold cavity;
(g) allowing said plastic injection material to at least partially harden; and
29 (h) removing said plastic material from the mold unit.
22. The method of claim 21 , further comprising the steps of:
(a) providing a pressure transfer plate on said mold frame;
(b) providing a pressure arm on said second mold section;
(c) moving said second mold section a sufficient distance toward said first mold section to allow the insertion of said pressure actuator between said pressure arm and said pressure transfer plate;
(d) moving said pressure actuator into operable engagement with said pressure transfer plate, between said pressure transfer plate and said pressure arm;
(e) applying pressure to said pressure transfer plate and said pressure arm with said pressure actuator to clamp said second mold section into sealed engagement with said first mold section to form a mold cavity and a parting line which surrounds said leader pins;
(f) releasing pressure of said pressure actuator against said pressure transfer plate and said pressure transfer bar;
(g) moving said pressure actuator from between said pressure transfer plate and said pressure transfer bar a sufficient distance to allow said pressure transfer bar to be moved toward said pressure transfer plate a distance which prevents the insertion of
30 said pressure actuator between said pressure transfer plate and said pressure transfer bar; and
(h) moving said second mold section away from said first mold section a sufficient distance to move said pressure transfer bar toward said pressure transfer plate a distance which prevents the insertion of said pressure actuator between said pressure transfer plate and said pressure transfer bar.
23. A method for applying clamping pressure to a plastic injection mold unit, comprising:
(a) providing leader pins;
(b) providing a first mold section directly secured to said leader pins;
(c) slidably coupling a second mold section directly to said leader pins, said second mold section being capable of forming a mold cavity with said first mold section when moved into engagement with said first mold section;
(d) providing a pressure transfer plate secured to said leader pins, wherein said second mold section is maintained between said first mold section and said pressure transfer plate, said pressure transfer plate being provided with an aperture;
(e) providing an ejection assembly releasably secured to said second mold section;
31 (f) providing a runner assembly releasably secured to said second mold section;
(g) providing a pressure arm on said second mold section in a manner which allows said pressure arm to pass through said aperture provided in said pressure transfer plate when said second mold section is moved away from said first mold section a predetermined distance and in a manner which passes force applied to said pressure arm directly onto said second mold section without passing said force onto said ejection assembly;
(h) providing a track on said pressure transfer plate;
(i) slidably coupling a pressure actuator to said track in a manner which allows said pressure actuator to be moved into and out of a position covering said aperture of said pressure transfer plate;
(j) moving said first mold section toward said second mold section a sufficient distance to provide an area between said pressure arm and said pressure transfer plate to accommodate said pressure actuator;
(k) sliding said pressure actuator along said track between said pressure arm and said pressure transfer plate and covering said aperture of said pressure transfer plate;
(1) applying pressure on said pressure arm with said pressure actuator by bracing said pressure actuator on said pressure transfer plate, said pressure being sufficient to maintain said second mold section in sealed engagement with said first mold section, and
32 said pressure being applied in a manner which passes said force to said first mold section and said second mold section without passing said pressure onto said ejection assembly and without passing said pressure onto said runner assembly;
(m) injecting a plastic injection material into said mold cavity;
(n) allowing said plastic injection material to harden;
(o) releasing said pressure of said pressure actuator on said pressure arm;
(p) sliding said pressure actuator along said track a sufficient distance to allow said pressure arm to move through said aperture of said pressure transfer plate;
(q) moving said second mold section away from said first mold section a sufficient distance to move said pressure arm through said aperture of said pressure transfer plate; and
(r) removing said plastic material from said mold cavity.
24. A plastic injection molding apparatus for molding a plastic article, said plastic injection molding apparatus comprising:
(a) a first mold section;
(b) a plate having an aperture therein;
33 (c) a second mold section between said first mold section and said plate, wherein said second mold section is engageable with and retractable from said first mold section;
(d) a pressure arm on said second mold section; and
(e) a cylinder assembly slidable from a first position between said plate and said second mold section to a second position, wherein said cylinder assembly is capable of supplying sufficient pressure to said pressure arm to clamp said second mold section into sealed engagement with said first mold section when said cylinder assembly is in said first position, and wherein said pressure arm is receivable in said aperture of said plate when said cylinder assembly is in said second position and when said second mold section is retracted from said first mold section.
25. The plastic injection molding apparatus according to claim 24, wherein said cylinder assembly comprises:
(a) a ram; and
(b) a hydraulic cylinder capable of extending said ram, said ram pushable on said pressure arm when said ram is extended by said hydraulic cylinder when said hydraulic cylinder is in said first position.
34
26. The plastic injection molding apparatus according to claim 24, further comprising leader pins, wherein said first mold section is directly secured to said leader pins, wherein said second mold section is directly coupled to said leader pins, and wherein said second mold section forms a parting line and a mold cavity with said first mold section when said second mold section is engaged with said first mold section.
27. The plastic injection molding apparatus according to claim 26, wherein said first mold section is directly secured to said leader pins in a manner which maintains said leader pins in a predetermined orientation relative to one another.
28. The plastic injection molding apparatus according to claim 26, wherein said parting line surrounds said leader pins when said second mold section is engaged with said first mold section.
29. The plastic injection molding apparatus according to claim 25, wherein said pressure arm is capable of transferring a force to said second mold section from said ram upon said ram extending when said hydraulic cylinder is in said first position.
35
30. The plastic injection molding apparatus according to claim 26, wherein said leader pins interconnect said first mold section and said plate.
31. The plastic injection molding apparatus according to claim 24, further comprising a track secured to said plate and slidably coupled to said cylinder assembly in a manner which allows said cylinder assembly to slide to and from said first position and said second position.
32. The plastic injection molding apparatus according to claim 31, further comprising a linear actuator secured to said cylinder assembly, wherein said linear actuator is capable of sliding said cylinder assembly to and from said first position and said second position along said track.
33. The plastic injection molding apparatus according to claim 24, further comprising means secured to said plate and said second mold section for moving said pressure arm a sufficient
36 distance from said plate to allow said cylinder assembly to be slid to said first position.
34. The plastic injection molding apparatus according to claim 33, wherein said means for moving said pressure arm comprises a long stroke hydraulic cylinder.
35. The plastic injection molding apparatus according to claim 24, further comprising an ejection assembly secured to said second mold section, wherein said ejection assembly is not subject to clamping forces when said second mold section is clamped into sealed engagement with said first mold section.
36. The plastic injection molding apparatus according to claim 24, further comprising a runner assembly secured to said first mold section, wherein said runner assembly is not subject to clamping forces when said second mold section is clamped into sealed engagement with said first mold section.
37
37. A plastic injection molding apparatus for molding a plastic article, comprising:
(a) a first mold section;
(b) a second mold section forming a mold cavity with said first mold section when moved into sealed engagement with said first mold section; and
(c) a pressure actuator slidable into a position proximate to said second mold section, said pressure actuator capable of supplying sufficient pressure to said second mold section to clamp said second mold section into sealed engagement with said first mold section to form said mold cavity.
38
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU52975/96A AU5297596A (en) | 1995-02-21 | 1996-02-21 | Self-contained molding apparatus and method of use |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/391,591 US5665405A (en) | 1995-02-21 | 1995-02-21 | Self-contained molding apparatus and method for clamping the mold unit of an injection mold apparatus |
| US08/391,591 | 1995-02-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996026064A1 WO1996026064A1 (en) | 1996-08-29 |
| WO1996026064B1 true WO1996026064B1 (en) | 1996-10-10 |
Family
ID=23547220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1996/002339 WO1996026064A1 (en) | 1995-02-21 | 1996-02-21 | Self-contained molding apparatus and method of use |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5665405A (en) |
| AU (1) | AU5297596A (en) |
| WO (1) | WO1996026064A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10100001C1 (en) * | 2001-01-01 | 2002-05-23 | Kloeckner Desma Elastomertechn | Injection molding machine, comprises a vertically movable closure unit, plate shaped upper and lower yokes, and a movable mould tensioning plate |
| US20050233109A1 (en) * | 2004-04-15 | 2005-10-20 | Jeanine Hettinga | Bottle closure |
| US8225498B2 (en) * | 2007-04-26 | 2012-07-24 | Siemens Industry, Inc. | System and method for reconfiguring a harness board |
| WO2017023959A1 (en) * | 2015-08-05 | 2017-02-09 | Illinois Tool Works Inc. | Injection moulding tool and method |
| AU2016210598B9 (en) | 2015-08-05 | 2021-11-04 | Illinois Tool Works Inc. | Tool for forming a cartridge piston and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1147750B (en) * | 1959-06-06 | 1963-04-25 | Krauss Maffei Ag | Mold closing device, especially for injection molding machines that process thermoplastics |
| DE2019883C3 (en) * | 1970-04-24 | 1980-11-20 | Krauss-Maffei Ag, 8000 Muenchen | Mold clamping device, especially for plastic processing injection molding machines |
| CH534556A (en) * | 1971-02-25 | 1973-03-15 | Battenfeld Maschfab | Mold closing device, in particular for die casting and injection molding machines for metals and plastics |
| DE2631603A1 (en) * | 1976-07-14 | 1978-01-19 | Karl Hehl | MOLD CLAMPING UNIT OF AN INJECTION MOLDING MACHINE |
| DE2756717C3 (en) * | 1977-12-20 | 1980-08-21 | Battenfeld Maschinenfabriken Gmbh, 5882 Meinerzhagen | Mold closing device, in particular on die casting machines for metals and plastics |
| DE3000798C2 (en) * | 1980-01-11 | 1982-09-09 | HASCO-Normalien Hasenclever & Co, 5880 Lüdenscheid | Device for a temporary fixed coupling of mold plates which can be moved relative to one another to at least two parting planes |
| US4425091A (en) * | 1980-10-20 | 1984-01-10 | Prince Corporation | Molding machine |
| DE4115592A1 (en) * | 1991-05-14 | 1992-11-26 | Battenfeld Gmbh | CLOSING UNIT FOR INJECTION MOLDING MACHINES |
-
1995
- 1995-02-21 US US08/391,591 patent/US5665405A/en not_active Expired - Fee Related
-
1996
- 1996-02-21 WO PCT/US1996/002339 patent/WO1996026064A1/en active Search and Examination
- 1996-02-21 AU AU52975/96A patent/AU5297596A/en not_active Abandoned
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