ES352388A1 - Drawing method and apparatus - Google Patents
Drawing method and apparatusInfo
- Publication number
- ES352388A1 ES352388A1 ES352388A ES352388A ES352388A1 ES 352388 A1 ES352388 A1 ES 352388A1 ES 352388 A ES352388 A ES 352388A ES 352388 A ES352388 A ES 352388A ES 352388 A1 ES352388 A1 ES 352388A1
- Authority
- ES
- Spain
- Prior art keywords
- sheet
- ridge
- mould
- initially
- pressure
- 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
- 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
- B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
- B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
Abstract
In a process for cold drawing hollow articles from plastics sheet material, the sheet is initially peripherally clamped under a first pressure and, during the drawing operation, the pressure is reduced to a lower value. This prevents wrinkling and fraying of the lip of the article and increases its dimensional stability. In the described embodiment, the sheet is drawn between co-operating male and female dies 16 and 32 and is initially applied by the female die against an annular draw pad 26 having an outer peripheral ridge 40. In operation, the sheet is initially clamped against the ridge by forward movement of the female mould, further movement of the mould causing the sheet to be drawn over the male mould. At a predetermined instance during the drawing stroke, the sheet is completely drawn off the ridge into the larger gap adjacent thereto thus causing the desired decrease in clamping pressure on the sheet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62976367A | 1967-04-10 | 1967-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES352388A1 true ES352388A1 (en) | 1969-08-01 |
Family
ID=24524386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES352388A Expired ES352388A1 (en) | 1967-04-10 | 1968-04-04 | Drawing method and apparatus |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS509818B1 (en) |
| AT (1) | AT316124B (en) |
| BE (1) | BE713486A (en) |
| CH (1) | CH470246A (en) |
| DE (1) | DE1778169B2 (en) |
| ES (1) | ES352388A1 (en) |
| FR (1) | FR1560819A (en) |
| GB (1) | GB1213200A (en) |
| SE (1) | SE323508B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51125737U (en) * | 1975-04-02 | 1976-10-12 | ||
| US4404162A (en) * | 1979-07-16 | 1983-09-13 | Sumitomo Bakelite Company Ltd. | Process for producing a thin-wall deep drawn container of thermoplastic resin |
| CN114011968A (en) * | 2021-11-05 | 2022-02-08 | 沧州春潮五金制造有限公司 | Stretching manufacturing process of socket type filter shell |
| CN117162460A (en) * | 2023-08-23 | 2023-12-05 | 苏州凌耀医疗器械科技有限公司 | Medical plastic uptake packing box and production process thereof |
-
1967
- 1967-12-13 JP JP7956467A patent/JPS509818B1/ja active Pending
-
1968
- 1968-03-27 GB GB1468168A patent/GB1213200A/en not_active Expired
- 1968-03-27 SE SE409768A patent/SE323508B/xx unknown
- 1968-04-03 DE DE19681778169 patent/DE1778169B2/en active Granted
- 1968-04-04 ES ES352388A patent/ES352388A1/en not_active Expired
- 1968-04-04 FR FR1560819D patent/FR1560819A/fr not_active Expired
- 1968-04-08 AT AT340668A patent/AT316124B/en not_active IP Right Cessation
- 1968-04-10 BE BE713486D patent/BE713486A/xx unknown
- 1968-04-10 CH CH535668A patent/CH470246A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH470246A (en) | 1969-03-31 |
| AT316124B (en) | 1974-06-25 |
| FR1560819A (en) | 1969-03-21 |
| DE1778169A1 (en) | 1971-07-29 |
| GB1213200A (en) | 1970-11-18 |
| DE1778169C3 (en) | 1975-02-06 |
| DE1778169B2 (en) | 1974-06-20 |
| SE323508B (en) | 1970-05-04 |
| JPS509818B1 (en) | 1975-04-16 |
| BE713486A (en) | 1968-08-16 |
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