WO2002036323B1 - Co-injection valve-gate bushing with separate material flow paths - Google Patents
Co-injection valve-gate bushing with separate material flow pathsInfo
- Publication number
- WO2002036323B1 WO2002036323B1 PCT/US2001/046230 US0146230W WO0236323B1 WO 2002036323 B1 WO2002036323 B1 WO 2002036323B1 US 0146230 W US0146230 W US 0146230W WO 0236323 B1 WO0236323 B1 WO 0236323B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- passageway
- bushing
- cavity
- valve
- actuating mechanism
- 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.)
- Ceased
Links
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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1603—Multi-way nozzles specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Apparatus and methods for co-injection of plastic materials. Two plastic materials are injected through separate passageways (44, 48) in a bushing member (12) into the mold cavity (26). A pin member (60) positioned in a third passageway (46) in the mold bushing controls the introduction of the two plastic materials through an orifice (42) and into the cavity. An actuator mechanism (71) with pressure actuated piston members (70, 72) controls the movement of the pin member.
Claims
1. (Amended) A valve-gate mechanism for use in a co- injection molding process, said mechanism comprising: a bushing member having a first end and a second end, said bushing member having a first longitudinally extending passageway 5 extending from said first end to said second end, a second longitudinally extending passageway extending from said first end and in communication with said first passageway immediately adjacent said second end, and a third longitudinally extending passageway extending from said first end and in communication with said first passageway immediately adjacent said second o end and at an axial spaced location from the communication of said second passageway with said first passageway; a pin member positioned in said first passageway and having an upper end and a lower end; and an actuating mechanism for controlling the longitudinal 5 movement of said pin member in said first passageway, said upper end of said pin member being connected to said actuating mechanism; said actuating mechanism being operable to move said pin member into at least three positions including a first position wherein only plastic material in said second passageway is allowed to enter said first o passageway, a second position wherein plastic material from both said first and second passageways are allowed to enter said first passageway, and a third position wherein no plastic material from either the second or third passageway is allowed to enter said first passageway; wherein plastic materials in said second and third passageways are 5 injected from said second end of said bushing member in substantially straight unobstructed flow channels and without being subjected to annular flow around said pin member.
2. The valve-gate mechanism as set forth in claim 1 wherein said actuating mechanism comprises a first pressure actuated piston member and a second pressure actuated piston member, and wherein said pin member is connected to said first piston member.
3. The valve-gate mechanism as set forth in claim 2 further comprising means for pressure actuating said first and second piston members.
4. The valve-gate mechanism as set forth in claim 2 further comprising a block member having a cavity chamber and wherein said first and second piston members are movably positioned in said cavity chamber.
5. The valve-gate mechanism as set forth in claim 2 wherein said pin member is adjustably connected to said first piston member.
6. (Amended) A system for co-injection molding, said system comprising: a mold having a mold cavity; a first source of a first molten plastic material for being supplied into said mold cavity; a second source for a second molten plastic material for being supplied into said mold cavity; a bushing member positioned in said mold and having a first passageway and a first valve member for supplying the first and second molten plastic materials into said mold cavity; an actuating mechanism having a fluid cavity therein and a
18 plurality of passageways in fluid communication with said fluid cavity, a second passageway in said bushing member for entry and passage of a first molten plastic material through said bushing, into said first passageway, and into said mold cavity, 5 a third passageway in said bushing member for entry and passage of a second molten plastic material through said bushing, into said first passageway, and into said mold cavity; a pin member movably positioned in said first passageway and having a second valve member for mating with said first valve member to o form a first valve means; and a first piston member connected to said pin member and movably positioned in said cavity in said actuating mechanism; wherein said actuating mechanism is adapted to control the movement of said pin member in order to regulate the flow of plastic 5 materials in said second and third passageways and into said mold cavity; wherein said first and second molten plastic materials are injected from said bushing member into said mold cavity in substantially straight unobstructed flows through said second and third passageways, respectively, and without being subjected to annular flows around said pin 0 member.
7. The system of claim 6 further comprising a manifold member positioned between said bushing member and said actuating mechanism, said manifold member having fourth and fifth passageways for introduction of the first and second plastic materials into said bushing 5 member.
19
8. The system of claim 6 further comprising sealing members for sealingly positioning said piston member in said fluid cavity.
9. The system of claim 6 further comprising a second piston member in said cavity.
20
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2002228761A AU2002228761A1 (en) | 2000-10-31 | 2001-10-23 | Co-injection valve-gate bushing with separate material flow paths |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70257700A | 2000-10-31 | 2000-10-31 | |
| US09/702,577 | 2000-10-31 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2002036323A1 WO2002036323A1 (en) | 2002-05-10 |
| WO2002036323B1 true WO2002036323B1 (en) | 2003-05-22 |
| WO2002036323A9 WO2002036323A9 (en) | 2004-03-04 |
Family
ID=24821795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2001/046230 Ceased WO2002036323A1 (en) | 2000-10-31 | 2001-10-23 | Co-injection valve-gate bushing with separate material flow paths |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2002228761A1 (en) |
| WO (1) | WO2002036323A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20020593A1 (en) * | 2002-03-20 | 2003-09-22 | Enrico Scarabelli | PROCEDURE FOR INJECTION MOLDING OF PRODUCTS IN AT LEAST TWO DISTINCT MATERIALS |
| DE102006005643A1 (en) * | 2006-02-08 | 2007-08-09 | Mht Mold & Hotrunner Technology Ag | Needle valve useful in heat channel system for plastic injection molding, comprises shut-off needles connected to each other and pistons, which are movable in a cylinder socket and connected with the shut-off needles |
| WO2021030268A2 (en) | 2019-08-09 | 2021-02-18 | Nutcracker Therapeutics, Inc. | Microfluidic apparatus and methods of use thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5650178A (en) * | 1994-11-23 | 1997-07-22 | Bemis Manufacturing Company | Co-injection manifold for injection molding |
| US6062840A (en) * | 1997-09-02 | 2000-05-16 | Dynisco Hotrunners, Inc. | Hot runner system for coinjection molding |
| CA2219235C (en) * | 1997-10-23 | 2006-12-12 | Mold-Masters Limited | Five layer injection molding apparatus having four position valve member actuating mechanism |
-
2001
- 2001-10-23 WO PCT/US2001/046230 patent/WO2002036323A1/en not_active Ceased
- 2001-10-23 AU AU2002228761A patent/AU2002228761A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2002228761A1 (en) | 2002-05-15 |
| WO2002036323A1 (en) | 2002-05-10 |
| WO2002036323A9 (en) | 2004-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5141696A (en) | Method for injection molding using flow adjusting arrangement | |
| KR100549542B1 (en) | Fluid-Assisted Valve-Gate Bushings with Concentric Pin Members | |
| CA2457643A1 (en) | Valve gated injection molding system with independent flow control | |
| EP1993801B1 (en) | Co-injection nozzle assembly | |
| US5198238A (en) | Apparatus having an in-the-mold gas injection pin | |
| US7731489B2 (en) | Valve for co-injection molding apparatus | |
| JP2003536026A (en) | Booster pilot valve | |
| US7192270B2 (en) | Tight pitch nozzle with individual valve gate control | |
| KR101543554B1 (en) | Apparatus of actuating gate valves of a valve gate typed hot runner injection mold | |
| WO2002036323B1 (en) | Co-injection valve-gate bushing with separate material flow paths | |
| WO2001008462A3 (en) | System for individual control of multiple valve gates | |
| KR20070100259A (en) | Injection molding apparatus for injection molding a plurality of materials | |
| JP7503417B2 (en) | Injection molding equipment equipped with hot runners | |
| US6830447B2 (en) | Valve gate assembly for injection molding | |
| JP2008529861A (en) | Nozzles and equipment for injection molding | |
| EP0072103A1 (en) | Injector for plastic molds | |
| US6250569B1 (en) | Adjustable spraying head | |
| US7390184B2 (en) | Dual injection manifold | |
| WO2002034496B1 (en) | Gas valve pin mechanism | |
| CN107186968A (en) | Hot-runner pin valve controlling organization | |
| JPH07243407A (en) | Cylinder device | |
| CN118181663A (en) | Flow channel structure and flow channel control method | |
| JPH0732419A (en) | Injection molding die | |
| CA2179114A1 (en) | Injection molding apparatus and method of operating same | |
| MXPA99006131A (en) | Fluid assist valve-gate bushing with concentric pin members |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| B | Later publication of amended claims |
Free format text: 20020524 |
|
| REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
| 122 | Ep: pct application non-entry in european phase | ||
| COP | Corrected version of pamphlet |
Free format text: PAGES 1-12, DESCRIPTION, REPLACED BY NEW PAGES 1-12; PAGES 13-16, CLAIMS, REPLACED BY NEW PAGES 13-16; PAGES 1/3-3/3, DRAWINGS, REPLACED BY NEW PAGES 1/3-3/3; DUE TO LATE TRANSMITTAL BY THE RECEIVING OFFICE |
|
| NENP | Non-entry into the national phase in: |
Ref country code: JP |