ES375022A1 - Improvements in or relating to the production of laminar articles - Google Patents
Improvements in or relating to the production of laminar articlesInfo
- Publication number
- ES375022A1 ES375022A1 ES375022A ES375022A ES375022A1 ES 375022 A1 ES375022 A1 ES 375022A1 ES 375022 A ES375022 A ES 375022A ES 375022 A ES375022 A ES 375022A ES 375022 A1 ES375022 A1 ES 375022A1
- Authority
- ES
- Spain
- Prior art keywords
- mould
- injected
- composition
- cavity
- charge
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/34—Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
-
- 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
- B29C44/0461—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 by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
-
- 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
- B29C44/08—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 using several expanding or moulding steps
- B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
- B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
-
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- 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
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Molding Of Porous Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
In a process for making a laminate having a core and surface skin of dissimilar synthetic resin compositions, wherein a charge of the skin composition is injected into a mould cavity and subsequently a charge of the core composition is injected into the interior of the charge of the skin composition before the latter has set, the mould cavity is filled with the skin composition and then enlarged to allow the core composition to be injected. This enlarging of the mould may be effected by reducing the mould clamping force so that the injection pressure forces the mould halves apart. Alternatively the cavity may be fully enlarged before any of the core composition is injected. If the core composition is a foamable material the cavity is then further enlarged to allow foaming to take place. Three charges of material may be injected the third being of the same material as the first. One or more walls of the mould may be lined with a removable insert e.g. a sheet of wood, hardboard, metal or plastics or a flexible material to be incorporated in the moulded article. Articles specified are furniture, building panels and panels for cars and trains, interior trim for vehicles and seedboxes. Examples are given of suitable thermoplastic and thermosetting plastics and foaming agents. Reference has been directed by the Comptroller to Specification 1,156,217.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB61963/68A GB1255970A (en) | 1968-12-31 | 1968-12-31 | Improvements in or relating to the production of laminar articles |
Publications (1)
Publication Number | Publication Date |
---|---|
ES375022A1 true ES375022A1 (en) | 1972-03-01 |
Family
ID=10487711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES375022A Expired ES375022A1 (en) | 1968-12-31 | 1969-12-30 | Improvements in or relating to the production of laminar articles |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS501899B1 (en) |
BE (1) | BE743980A (en) |
CH (1) | CH493329A (en) |
DE (1) | DE1965368C3 (en) |
ES (1) | ES375022A1 (en) |
FR (1) | FR2027489B1 (en) |
GB (1) | GB1255970A (en) |
NL (1) | NL6919545A (en) |
SE (1) | SE355527B (en) |
ZA (1) | ZA699006B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4390487A (en) * | 1982-01-26 | 1983-06-28 | Rca Corporation | Method of making a laminated recorded disc |
ES2134306T3 (en) * | 1993-11-05 | 1999-10-01 | Battenfeld Gmbh | PROCEDURE AND DEVICE FOR CASTING BY INJECTION OF MULTILAYER ARTICLES. |
FR2718382B1 (en) * | 1994-04-12 | 1996-07-12 | Renault | Process for molding a plastic hinge and hinge obtained by this process. |
US5902534A (en) * | 1994-09-21 | 1999-05-11 | Mitsubishi Engineering-Plastics Corp. | Method of injection-molding thermoplastic resins |
JP3643671B2 (en) * | 1997-04-01 | 2005-04-27 | 三井化学株式会社 | Molding method for automotive exterior parts, laminated film or sheet used in the molding method, and automotive exterior parts |
DE102006061068A1 (en) | 2006-03-03 | 2007-09-06 | Felo-Werkzeugfabrik Holland-Letz Gmbh | Method for fabricating grip-handle e.g. for screw driver, involves providing second material, later forming inner layer, with foaming agent |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL279724A (en) * | 1961-06-20 | |||
US3363039A (en) * | 1963-08-09 | 1968-01-09 | Asahi Dow Ltd | Injection molding processes for thermoplastic materials |
GB1156217A (en) * | 1967-05-03 | 1969-06-25 | Ici Ltd | Process for the Production of Cellular Articles |
-
1968
- 1968-12-31 GB GB61963/68A patent/GB1255970A/en not_active Expired
-
1969
- 1969-12-29 JP JP44105320A patent/JPS501899B1/ja active Pending
- 1969-12-30 ZA ZA699006*A patent/ZA699006B/en unknown
- 1969-12-30 CH CH1944069A patent/CH493329A/en not_active IP Right Cessation
- 1969-12-30 ES ES375022A patent/ES375022A1/en not_active Expired
- 1969-12-30 SE SE18110/69A patent/SE355527B/xx unknown
- 1969-12-30 DE DE1965368A patent/DE1965368C3/en not_active Expired
- 1969-12-30 NL NL6919545A patent/NL6919545A/xx unknown
- 1969-12-31 FR FR6945720A patent/FR2027489B1/fr not_active Expired
- 1969-12-31 BE BE743980D patent/BE743980A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
BE743980A (en) | 1970-06-30 |
JPS501899B1 (en) | 1975-01-22 |
GB1255970A (en) | 1971-12-08 |
ZA699006B (en) | 1971-08-25 |
FR2027489A1 (en) | 1970-09-25 |
CH493329A (en) | 1970-07-15 |
DE1965368C3 (en) | 1975-04-10 |
DE1965368A1 (en) | 1970-07-16 |
DE1965368B2 (en) | 1972-11-23 |
NL6919545A (en) | 1970-07-02 |
SE355527B (en) | 1973-04-30 |
FR2027489B1 (en) | 1973-12-21 |
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