FR2058811A5 - Injection mould cavities dilated by wedge cams - Google Patents
Injection mould cavities dilated by wedge camsInfo
- Publication number
- FR2058811A5 FR2058811A5 FR6932976A FR6932976A FR2058811A5 FR 2058811 A5 FR2058811 A5 FR 2058811A5 FR 6932976 A FR6932976 A FR 6932976A FR 6932976 A FR6932976 A FR 6932976A FR 2058811 A5 FR2058811 A5 FR 2058811A5
- Authority
- FR
- France
- Prior art keywords
- plugs
- cavity
- dilated
- injection mould
- mould cavities
- 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
- 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
- B29C44/428—Mould constructions; Mould supporting equipment
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A mould with moving plugs in the top and/or bottom of each mould cavity has the plugs mounted on wedge shaped plates which reciprocate due to complementary wedge plates moving at right angles to the expansion axis. Melt is injected into an undersize cavity and the plugs are subsequently allowed to retract until the cavity is full size under conditions which allow the initial shot to expand. Reduced cycle times are obtained cf. compression moulding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6932976A FR2058811A5 (en) | 1969-09-26 | 1969-09-26 | Injection mould cavities dilated by wedge cams |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6932976A FR2058811A5 (en) | 1969-09-26 | 1969-09-26 | Injection mould cavities dilated by wedge cams |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2058811A5 true FR2058811A5 (en) | 1971-05-28 |
Family
ID=9040689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6932976A Expired FR2058811A5 (en) | 1969-09-26 | 1969-09-26 | Injection mould cavities dilated by wedge cams |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2058811A5 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2168534A1 (en) * | 1972-01-21 | 1973-08-31 | Pirelli |
-
1969
- 1969-09-26 FR FR6932976A patent/FR2058811A5/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2168534A1 (en) * | 1972-01-21 | 1973-08-31 | Pirelli |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GC | Lien (pledge) constituted | ||
ST | Notification of lapse | ||
GC | Lien (pledge) constituted |