FR2234981A1 - Moulding with foam core - injected between gradually closing half moulds with closure regulating mechanism - Google Patents
Moulding with foam core - injected between gradually closing half moulds with closure regulating mechanismInfo
- Publication number
- FR2234981A1 FR2234981A1 FR7422015A FR7422015A FR2234981A1 FR 2234981 A1 FR2234981 A1 FR 2234981A1 FR 7422015 A FR7422015 A FR 7422015A FR 7422015 A FR7422015 A FR 7422015A FR 2234981 A1 FR2234981 A1 FR 2234981A1
- Authority
- FR
- France
- Prior art keywords
- mould
- injection
- moulds
- closure
- foam core
- 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.)
- Granted
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
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
- B29C2045/563—Enlarging the mould cavity during injection
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
An injection moulding appts. comprises a mould constituted of two or more parts which can be brought in motion one relative to the others to define a mould chamber; the mould closure mechanism is constructed to enable the half-moulds to be brought continuously and gradually together during injection, the mould being supplied successively from two separate injection units via a single multi-way valve which permits only one unit to inject at one time; thus it is possible for a component having a foam core but a dense outer skin to be moulded with a continuous closure of the mould squeezing the material laterally as it is introduced into the mould. A control mechanism actuates the multiway valve to ensure switching over from the skin material to the core material while the half-moulds are still in relative motion. Pref. a number of limit switches actuated by the position of the half-moulds and also the positions of the two separate injection units controls the sequence of mould closure restraint, first injection, second injection and return to first injection to close the sprue.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3051373 | 1973-06-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2234981A1 true FR2234981A1 (en) | 1975-01-24 |
| FR2234981B1 FR2234981B1 (en) | 1976-12-24 |
Family
ID=10308859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7422015A Granted FR2234981A1 (en) | 1973-06-27 | 1974-06-25 | Moulding with foam core - injected between gradually closing half moulds with closure regulating mechanism |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5038755A (en) |
| DE (1) | DE2429789A1 (en) |
| FR (1) | FR2234981A1 (en) |
| IT (1) | IT1021060B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234075A (en) * | 1975-09-11 | 1977-03-15 | Dainippon Printing Co Ltd | Manufacture of netting sheet |
| US5314737A (en) * | 1991-09-30 | 1994-05-24 | Kimberly-Clark Corporation | Area thinned thin sheet materials |
-
1974
- 1974-06-21 DE DE19742429789 patent/DE2429789A1/en active Pending
- 1974-06-25 IT IT2445374A patent/IT1021060B/en active
- 1974-06-25 FR FR7422015A patent/FR2234981A1/en active Granted
- 1974-06-27 JP JP7376974A patent/JPS5038755A/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| NEANT * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2429789A1 (en) | 1975-01-16 |
| JPS5038755A (en) | 1975-04-10 |
| IT1021060B (en) | 1978-01-30 |
| FR2234981B1 (en) | 1976-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |