GB434949A - Improvements in the manufacture of hollow rubber articles - Google Patents
Improvements in the manufacture of hollow rubber articlesInfo
- Publication number
- GB434949A GB434949A GB93134A GB93134A GB434949A GB 434949 A GB434949 A GB 434949A GB 93134 A GB93134 A GB 93134A GB 93134 A GB93134 A GB 93134A GB 434949 A GB434949 A GB 434949A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- cavities
- parts
- channels
- suction
- 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
- B29D22/00—Producing hollow articles
- B29D22/04—Spherical articles, e.g. balls
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
434,949. Moulding hollow rubber articles such as balls &c. TALALAY, J. A., 5, St. Minver Road, Bedford. Jan. 10, 1934, No. 931. [Class 87 (ii)] In moulding hollow rubber articles having walls of uniform thickness, such as balls, bulbs or dolls, from sheets of unvulcanized stock in moulds having cavities, a stock sheet 9 of non- uniform thickness is used, the parts 15 of the sheet corresponding to the cavities 2 in the mould being of greater thickness than the parts corresponding to raised portions of the mould, the thickness varying with the varying depth of the cavity. The mould may be in two parts 1<a>, 1<b> hinged together and each cavity may correspond to the shape of one half of the article. For making balls the thickened parts 15 may be plano-convex or bi-convex. The cavities 2 are connected by ducts 6, 3, 4 to a cock connecting to a vacuum pump or vessel and a compressed air conduit. Channels 7 surrounding the cavities are connected by bores 8 to the cock or to another pressure and suction system. The sheets 9 may be formed between engraved rolls or plates or by gelatinating latex on such plates and may be built up from layers. Sheets 9 are laid on each mould part and the channels 7 and ducts 6 are connected to suction to draw and hold the sheet first at the channels 7 and then draw the parts 15 into the cavities where they are stretched to uniform thickness. An inflation block and blowing material are placed in the ball halves, their edges are coated with rubber cement and the mould is closed, waste stock being cut off in the channels 7. Air is admitted to the ducts to blow out the waste stock and the articles are transferred to a vulcanizing mould. Suction and pressure or suction or pressure may be used with or without cores.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB93134A GB434949A (en) | 1934-01-10 | 1934-01-10 | Improvements in the manufacture of hollow rubber articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB93134A GB434949A (en) | 1934-01-10 | 1934-01-10 | Improvements in the manufacture of hollow rubber articles |
Publications (1)
Publication Number | Publication Date |
---|---|
GB434949A true GB434949A (en) | 1935-09-10 |
Family
ID=9713030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB93134A Expired GB434949A (en) | 1934-01-10 | 1934-01-10 | Improvements in the manufacture of hollow rubber articles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB434949A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112041233A (en) * | 2019-03-13 | 2020-12-04 | 相互株式会社 | Film heating forming device of blister packaging machine |
-
1934
- 1934-01-10 GB GB93134A patent/GB434949A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112041233A (en) * | 2019-03-13 | 2020-12-04 | 相互株式会社 | Film heating forming device of blister packaging machine |
CN112041233B (en) * | 2019-03-13 | 2021-10-15 | 相互株式会社 | Film heating forming device of blister packaging machine |
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