GB1332883A - Injection moulding - Google Patents
Injection mouldingInfo
- Publication number
- GB1332883A GB1332883A GB281372A GB281372A GB1332883A GB 1332883 A GB1332883 A GB 1332883A GB 281372 A GB281372 A GB 281372A GB 281372 A GB281372 A GB 281372A GB 1332883 A GB1332883 A GB 1332883A
- Authority
- GB
- United Kingdom
- Prior art keywords
- injection
- skin
- skin material
- ram
- core material
- 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.)
- Expired
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
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/0492—Devices for feeding the different materials
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
1332883 Injection moulding IMPERIAL CHEMICAL INDUSTRIES Ltd 20 Jan 1972 [28 Jan 1971] 2813/72 Heading B5A An injection moulding machine comprises first and second injection units for first and second materials 11 and 21, each unit comprising an injection ram 15, 25 in an injection barrel 10, 20 and a feed channel 13, 23, the feed channels being connectable to each other and to a common sprue channel 3, control means to control the position of the ram in the second injection unit in dependence directly or indirectly on the amount of first material injected, and limiting means to limit the flow of the second material up the feed channel 13 of the first material during injection of the second material. The control means may be responsive to (i) the position of the first ram 15, or (ii) the time elapsed since commencement of injection of the first material, or (iii) the pressure exerted on the first material by the ram 15. The machine may be used for injection moulding articles having a sandwich structure in which a skin of one material 11 is first injected and then a core material 21, which may be foamable, is injected so as to be enclosed by the skin material. The invention reduces contamination of the skin material by the core material. A pump 4 supplies hydraulic fluid through valves 110, 210 to cylinders 17, 27 containing pistons 16, 26 connected to rams 15, 25 respectively. An accumulator 114 is connected to the cylinder 17 for the skin material injection unit. Pump 4 normally operates continuously, a relief valve 6 returning fluid to a reservoir 5 when the pressure exceeds a certain limit. When injection of skin material is commenced, the sprue end of the core material feed channel 23 is filled with skin material 121 (Fig. 1). This may be brought about by injecting a further quantity of skin material after injecting the core material. Thus during injection of core material a collar 119 on skin injection ram 15 engages a limit stop 120 which can subsequently be retracted to allow a further injection of skin material. Alternatively the further injection of skin material may be effected by rotation of the screw 12. Injection of core material may be commenced before injection of skin material is completed and the time of 'overlap' may be varied at will from nil to nearly the total skin material injection time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1992072A IT947073B (en) | 1971-01-28 | 1972-01-28 | INJECTION MOLDING |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2103885A DE2103885B2 (en) | 1971-01-28 | 1971-01-28 | Method and device for the production of injection molded articles from two different plastic materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1332883A true GB1332883A (en) | 1973-10-10 |
Family
ID=5797104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB281372A Expired GB1332883A (en) | 1971-01-28 | 1972-01-20 | Injection moulding |
Country Status (11)
| Country | Link |
|---|---|
| AT (1) | AT342287B (en) |
| AU (1) | AU453991B2 (en) |
| BE (1) | BE778674A (en) |
| CA (1) | CA970512A (en) |
| CH (1) | CH533509A (en) |
| ES (1) | ES399278A1 (en) |
| FR (1) | FR2123494B1 (en) |
| GB (1) | GB1332883A (en) |
| NL (1) | NL7201123A (en) |
| SE (1) | SE380472B (en) |
| ZA (1) | ZA72296B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT390758B (en) * | 1988-09-19 | 1990-06-25 | Engel Gmbh Maschbau | INJECTION MOLDING NOZZLE FOR AN INJECTION MOLDING MACHINE |
| AT391833B (en) * | 1988-10-03 | 1990-12-10 | Engel Gmbh Maschbau | Injection nozzle for injection-moulding machines |
| WO2007101738A1 (en) * | 2006-03-03 | 2007-09-13 | Kraussmaffei Technologies Gmbh | Integrated system apparatus for production of composites |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529507A1 (en) * | 1982-07-05 | 1984-01-06 | Cibie Projecteurs | METHOD FOR MANUFACTURING INJECTION-MOLDING SHAPED ARTICLE AND ARTICLE OBTAINED |
| JPS62184817A (en) * | 1986-02-10 | 1987-08-13 | Toyo Seikan Kaisha Ltd | Compression molded product with multi-layer construction and manufacture and device thereof |
| AT400020B (en) * | 1992-07-07 | 1995-09-25 | Engel Gmbh Maschbau | Injection unit for an injection-moulding machine |
| NL1001417C2 (en) * | 1995-10-13 | 1997-04-15 | Inter Tooling Services Bv | Device for manufacturing hollow plastic objects. |
-
1972
- 1972-01-17 ZA ZA720296A patent/ZA72296B/en unknown
- 1972-01-20 GB GB281372A patent/GB1332883A/en not_active Expired
- 1972-01-24 AU AU38238/72A patent/AU453991B2/en not_active Expired
- 1972-01-27 SE SE7200950A patent/SE380472B/en unknown
- 1972-01-27 NL NL7201123A patent/NL7201123A/xx unknown
- 1972-01-28 BE BE778674A patent/BE778674A/en unknown
- 1972-01-28 CH CH128272A patent/CH533509A/en not_active IP Right Cessation
- 1972-01-28 CA CA133,451A patent/CA970512A/en not_active Expired
- 1972-01-28 ES ES399278A patent/ES399278A1/en not_active Expired
- 1972-01-28 AT AT70872A patent/AT342287B/en not_active IP Right Cessation
- 1972-01-28 FR FR7202811A patent/FR2123494B1/fr not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT390758B (en) * | 1988-09-19 | 1990-06-25 | Engel Gmbh Maschbau | INJECTION MOLDING NOZZLE FOR AN INJECTION MOLDING MACHINE |
| US5030076A (en) * | 1988-09-19 | 1991-07-09 | Engel Maschinenbau Gesellschaft M.B.H. | Injection die for injecting two components |
| AT391833B (en) * | 1988-10-03 | 1990-12-10 | Engel Gmbh Maschbau | Injection nozzle for injection-moulding machines |
| WO2007101738A1 (en) * | 2006-03-03 | 2007-09-13 | Kraussmaffei Technologies Gmbh | Integrated system apparatus for production of composites |
Also Published As
| Publication number | Publication date |
|---|---|
| BE778674A (en) | 1972-07-28 |
| AU3823872A (en) | 1973-07-26 |
| FR2123494B1 (en) | 1978-09-08 |
| FR2123494A1 (en) | 1972-09-08 |
| ZA72296B (en) | 1972-09-27 |
| NL7201123A (en) | 1972-08-01 |
| ES399278A1 (en) | 1974-12-16 |
| SE380472B (en) | 1975-11-10 |
| ATA70872A (en) | 1977-07-15 |
| AU453991B2 (en) | 1974-09-25 |
| CA970512A (en) | 1975-07-08 |
| AT342287B (en) | 1978-03-28 |
| CH533509A (en) | 1973-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |