GB1374451A - Device for preventing non-uniform shrinkage of moulded thermoplastic material - Google Patents
Device for preventing non-uniform shrinkage of moulded thermoplastic materialInfo
- Publication number
- GB1374451A GB1374451A GB5913671A GB5913671A GB1374451A GB 1374451 A GB1374451 A GB 1374451A GB 5913671 A GB5913671 A GB 5913671A GB 5913671 A GB5913671 A GB 5913671A GB 1374451 A GB1374451 A GB 1374451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heel
- insert
- cavity
- moulded
- uniform shrinkage
- 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
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/0009—Producing footwear by injection moulding; Apparatus therefor
- B29D35/0018—Moulds
-
- 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
- B29C45/26—Moulds
-
- 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
- B29C45/568—Applying vibrations to the mould parts
- B29C2045/5685—Applying vibrations to the mould parts for eliminating internal voids in the moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
1374451 Injection moulding footwear BRITISH BATA SHOE CO Ltd 20 Dec 1971 [17 May 1971] 59136/71 Heading B5A Non-uniform shrinkage of a thermoplastic shoe sole element moulded in a mould 1, 2 having a mould insert 5, is prevented by means of at least one expansion cavity 9 in the insert 5, the cavity being shaped to trap a pocket of air (29) during the injection operation. The shoe sole element may be a sole, a heel or a sole and heel combination. As shown, the insert 5 is a heel insert having four legs 7 extending into a heel cavity 4, and each leg has at least one cavity 9 formed therein. Three ejector rods 11, 12, 13 are provided for ejecting the moulded element, the rod 11 being biased upwardly by a spring 15 and the rods 12, 13 being pneumatically operated (see Fig. 4, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA113,173A CA944113A (en) | 1971-05-17 | 1971-05-17 | Device for preventing shrinkage of moulded thermoplastic material |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1374451A true GB1374451A (en) | 1974-11-20 |
Family
ID=4089701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5913671A Expired GB1374451A (en) | 1971-05-17 | 1971-12-20 | Device for preventing non-uniform shrinkage of moulded thermoplastic material |
Country Status (6)
Country | Link |
---|---|
BR (1) | BR7203204D0 (en) |
CA (1) | CA944113A (en) |
FR (1) | FR2137414B1 (en) |
GB (1) | GB1374451A (en) |
IT (1) | IT944604B (en) |
NL (1) | NL168753C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05228970A (en) * | 1992-02-21 | 1993-09-07 | Sony Corp | Injection compression molding method, and injection mold and injection compression molding machine used therefor |
DE102004062766A1 (en) * | 2004-12-21 | 2006-06-29 | Miele & Cie. Kg | Method for producing a gasket for a washing machine and gasket for a washing machine |
-
1971
- 1971-05-17 CA CA113,173A patent/CA944113A/en not_active Expired
- 1971-08-16 NL NL7111257A patent/NL168753C/en active
- 1971-10-01 FR FR7135526A patent/FR2137414B1/fr not_active Expired
- 1971-12-20 GB GB5913671A patent/GB1374451A/en not_active Expired
- 1971-12-30 IT IT3316971A patent/IT944604B/en active
-
1972
- 1972-05-22 BR BR320472A patent/BR7203204D0/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL7111257A (en) | 1972-11-21 |
FR2137414B1 (en) | 1973-05-25 |
CA944113A (en) | 1974-03-26 |
DE2223737A1 (en) | 1972-11-30 |
BR7203204D0 (en) | 1973-06-07 |
NL168753C (en) | 1982-05-17 |
IT944604B (en) | 1973-04-20 |
FR2137414A1 (en) | 1972-12-29 |
DE2223737B2 (en) | 1976-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |