ES399703A1 - Moulding of articles of foam material - Google Patents
Moulding of articles of foam materialInfo
- Publication number
- ES399703A1 ES399703A1 ES399703A ES399703A ES399703A1 ES 399703 A1 ES399703 A1 ES 399703A1 ES 399703 A ES399703 A ES 399703A ES 399703 A ES399703 A ES 399703A ES 399703 A1 ES399703 A1 ES 399703A1
- Authority
- ES
- Spain
- Prior art keywords
- mixture
- mold
- agent
- cold
- temperature
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
-
- 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
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
- B29C44/422—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by injecting by forward movement of the plastizising screw
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)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Improvements in the injection molding processes of objects of spongy material, which comprise the steps of melting a material for injection molding and of mixing the material with a dilating agent, while maintaining the mixture at a temperature below that appropriate for the foaming of said driving agent, characterized in that the temperature of the mixture rises to a temperature equal to at least the normal temperature for foaming the mixture, immediately before injecting it into the mold, by the heat produced by forcing the mixture to travel through a conduit that restricts its passage; by introducing the mixture into a cold and expandable mold cavity at a rate sufficient to fill the mold cavity during the induction period of the dilating agent; why said agent is deactivated in the portion of the mixture that is in contact with the cold interior walls of the mold, and why finally, the volume of the mold cavity is increased, as well as the portion of the mixture that is not in contact with cold mold walls. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP322371A JPS5428426B1 (en) | 1971-01-29 | 1971-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES399703A1 true ES399703A1 (en) | 1974-12-01 |
Family
ID=11551429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES399703A Expired ES399703A1 (en) | 1971-01-29 | 1972-01-28 | Moulding of articles of foam material |
Country Status (20)
| Country | Link |
|---|---|
| JP (1) | JPS5428426B1 (en) |
| AT (1) | AT342290B (en) |
| BE (1) | BE778748A (en) |
| CA (1) | CA977114A (en) |
| CH (1) | CH533001A (en) |
| CS (1) | CS166042B2 (en) |
| DE (1) | DE2204157C3 (en) |
| DK (1) | DK142608B (en) |
| ES (1) | ES399703A1 (en) |
| FI (1) | FI56641C (en) |
| FR (1) | FR2123540B1 (en) |
| GB (1) | GB1382274A (en) |
| HU (1) | HU167065B (en) |
| IL (1) | IL38667A (en) |
| IS (1) | IS2054A7 (en) |
| IT (1) | IT947068B (en) |
| NL (1) | NL172131C (en) |
| NO (1) | NO138281C (en) |
| PL (1) | PL84475B1 (en) |
| SE (1) | SE8103741L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3805215A1 (en) * | 1988-02-19 | 1989-08-31 | Triumph Adler Ag | METHOD FOR PRODUCING A PLASTIC WRITING ROLL FOR WRITING OR SIMILAR OFFICE MACHINES |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3384691A (en) * | 1965-09-10 | 1968-05-21 | Allied Chem | Method for molding a structure having a foamed plastic core substantially enclosed within an essentially unfoamed plastic layer |
| CH471671A (en) * | 1967-06-09 | 1969-04-30 | United Shoe Machinery Corp | Method and device for injection molding objects made of foam |
| DE1950406C3 (en) * | 1968-10-15 | 1981-12-03 | USM Corp., 06032 Farmington, Conn. | Process for the injection molding of objects from a mixture of a foamable plastic and a temperature-sensitive blowing agent |
-
1971
- 1971-01-29 JP JP322371A patent/JPS5428426B1/ja active Pending
-
1972
- 1972-01-26 IS IS2054A patent/IS2054A7/en unknown
- 1972-01-26 FI FI189/72A patent/FI56641C/en active
- 1972-01-27 CA CA133,342A patent/CA977114A/en not_active Expired
- 1972-01-27 PL PL1972153148A patent/PL84475B1/pl unknown
- 1972-01-28 DK DK38472AA patent/DK142608B/en not_active IP Right Cessation
- 1972-01-28 DE DE2204157A patent/DE2204157C3/en not_active Expired
- 1972-01-28 FR FR7202997A patent/FR2123540B1/fr not_active Expired
- 1972-01-28 ES ES399703A patent/ES399703A1/en not_active Expired
- 1972-01-28 IL IL38667A patent/IL38667A/en unknown
- 1972-01-28 NL NLAANVRAGE7201213,A patent/NL172131C/en not_active IP Right Cessation
- 1972-01-28 AT AT68972A patent/AT342290B/en not_active IP Right Cessation
- 1972-01-28 HU HUUA187A patent/HU167065B/hu unknown
- 1972-01-28 IT IT19915/72A patent/IT947068B/en active
- 1972-01-28 CH CH131272A patent/CH533001A/en not_active IP Right Cessation
- 1972-01-28 GB GB411972A patent/GB1382274A/en not_active Expired
- 1972-01-28 NO NO210/72A patent/NO138281C/en unknown
- 1972-01-31 CS CS595A patent/CS166042B2/cs unknown
- 1972-01-31 BE BE778748A patent/BE778748A/en not_active IP Right Cessation
-
1981
- 1981-06-15 SE SE8103741A patent/SE8103741L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IL38667A (en) | 1975-05-22 |
| BE778748A (en) | 1972-05-16 |
| HU167065B (en) | 1975-07-28 |
| IS2054A7 (en) | 1972-02-16 |
| CA977114A (en) | 1975-11-04 |
| NO138281C (en) | 1978-08-09 |
| FI56641B (en) | 1979-11-30 |
| NL7201213A (en) | 1972-08-01 |
| DE2204157B2 (en) | 1981-02-26 |
| CS166042B2 (en) | 1976-01-29 |
| DK142608C (en) | 1981-08-03 |
| FI56641C (en) | 1980-03-10 |
| IL38667A0 (en) | 1972-03-28 |
| PL84475B1 (en) | 1976-04-30 |
| DK142608B (en) | 1980-12-01 |
| ATA68972A (en) | 1977-07-15 |
| DE2204157C3 (en) | 1989-02-23 |
| GB1382274A (en) | 1975-01-29 |
| DE2204157A1 (en) | 1972-08-10 |
| NL172131C (en) | 1983-07-18 |
| AT342290B (en) | 1978-03-28 |
| SE8103741L (en) | 1981-06-15 |
| NO138281B (en) | 1978-05-02 |
| CH533001A (en) | 1973-01-31 |
| NL172131B (en) | 1983-02-16 |
| FR2123540B1 (en) | 1975-10-24 |
| IT947068B (en) | 1973-05-21 |
| FR2123540A1 (en) | 1972-09-08 |
| JPS5428426B1 (en) | 1979-09-17 |
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