GB527972A - Improvements in and relating to injection moulding machines - Google Patents
Improvements in and relating to injection moulding machinesInfo
- Publication number
- GB527972A GB527972A GB11041/39A GB1104139A GB527972A GB 527972 A GB527972 A GB 527972A GB 11041/39 A GB11041/39 A GB 11041/39A GB 1104139 A GB1104139 A GB 1104139A GB 527972 A GB527972 A GB 527972A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- heating
- cylinder
- injection moulding
- slide
- 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
- B29C45/72—Heating or cooling
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
527,972. Injection moulding-machines. HEMPEL, E. April 11, 1939, No. 11041. Convention date, April 11, 1938. [Class 87 (ii)] In injection moulding-machines for thermoplastic material the material, before entering the nozzle, is caused to flow around and past a heating-member provided with helical ribs which split the material into a plurality of helical strands. The material is forced by a piston 11 past the heating-member 13 to the nozzles 12. The member 13 comprises a tubular part 14 having a number of bores 15 containing heating-elements and having also four helical ribs 17 for deflecting the plastic material. An exchangeable mouth-piece 25 carrying the four nozzles 12 is attached to the cylinder 18 of the press by a cap 19 which engages the press frame 23 by bayonet slot connections 21 which have inclined surfaces to tighten the joint. Insulation 24 is provided between the cap 19 and cylinder 18 which may have additional heating recesses. The nozzle conduits 26 diverge upwardly to form mixing chambers which are separated by central partitions 27, Fig. 2, having acute edges and partitions 29 which form continuations of the ribs 17 and cause the helical strands of material to turn upon themselves and become mixed. The mouth-piece 25 and cylinder 18 are held against rotation by a key 31 and pin 32. The conduits 26 are provided with slide valves 34, Fig. 3, which are operated by inclined faces which engage corresponding faces 38 on the mould slide. As the mould is lowered the valves 34 are reciprocated. The valves 34 are hollow and are provided with electric heating elements 42 which are connected to contact strips 43. The contacts 43 slide on insulating bars 45 which contain contact members 47 carrying the current so arranged that the current only flows through the heaters 42 when the valves 34 are open. Specification 528,171 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE527972X | 1938-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB527972A true GB527972A (en) | 1940-10-21 |
Family
ID=6553505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11041/39A Expired GB527972A (en) | 1938-04-11 | 1939-04-11 | Improvements in and relating to injection moulding machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB527972A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022134756A1 (en) * | 2020-12-24 | 2022-06-30 | 江苏博迁新材料股份有限公司 | Engagement support structure for nozzle and protective sleeve |
-
1939
- 1939-04-11 GB GB11041/39A patent/GB527972A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022134756A1 (en) * | 2020-12-24 | 2022-06-30 | 江苏博迁新材料股份有限公司 | Engagement support structure for nozzle and protective sleeve |
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