GB739943A - Improvements in or relating to injection moulding machines - Google Patents
Improvements in or relating to injection moulding machinesInfo
- Publication number
- GB739943A GB739943A GB5290/54A GB529054A GB739943A GB 739943 A GB739943 A GB 739943A GB 5290/54 A GB5290/54 A GB 5290/54A GB 529054 A GB529054 A GB 529054A GB 739943 A GB739943 A GB 739943A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- piston
- mould
- injection
- valve
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
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
739,943. Injection-moulding machines. EYNARD, E. Feb. 23, 1954 [June 2, 1953], No. 5290/54. Class 87 (2). A tubular piston or sleeve 10, disposed between the injection piston 12 and the injection cylinder 1, is freely slidable in the cylinder between the right-hand position shown in Fig. 1 and the left-hand position shown in Fig. 3. The sleeve always communicates with the feed inlet la of the cylinder by means of a slot 10c in the sleeve. Operation:- (1)The mould 7 having been closed, Fig. 1, and having pushed open a normallyclosed valve 6 in the nozzle 5, the injection piston 12 moves to the left. The material A in the sleeve, which is solid or semi-solid, is compressed by the piston into a compact mass that adheres to the sleeve, and the sleeve is thus moved to the left by the piston. The plastified material B in the cylinder 1 is thus forced by the sleeve into the mould, the sleeve being halted by abutment with the torpedo 8, the latter having a recess 8a into which enters a pointed nose 10a on the sleeve. Apertures 10b are formed in the forward end of the sleeve. (2) The mould opens, valve 6 closes, and piston 12 recedes to the right, Fig. 3, leaving an empty space C in the sleeve. Into this space falls fresh material from the hopper 9. (3) Piston 12 again advances to the left from the Fig. 3 position, forcing material through the poles 10b, and since valve 6 is closed the sleeve is forced back to the Fig. 1 position, being stopped by a screwed ring 11. (4) Piston 12 retracts to the right, more fresh material falls into the sleeve, and the position is as shown in Fig. 1. The cycle is then repeated. Thus for each injection into the mould two lots of material are fed from the hopper. In modifications (not illustrated in the Specification) (a) the head 10a of the sleeve may be omitted; (b) the forward stroke of the sleeve may be limited by means other than the torpedo; and (c) the valve 6 may be omitted, the mould itself preventing discharge when it has been filled.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR739943X | 1953-06-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB739943A true GB739943A (en) | 1955-11-02 |
Family
ID=9132995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5290/54A Expired GB739943A (en) | 1953-06-02 | 1954-02-23 | Improvements in or relating to injection moulding machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB739943A (en) |
-
1954
- 1954-02-23 GB GB5290/54A patent/GB739943A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1307764A (en) | Injection moulding machines | |
| US2404559A (en) | Plastic slug forming and feeding mechanism | |
| US2804649A (en) | Plastic moulding machines | |
| US4342717A (en) | Injection moulding method and apparatus with mould runner reservoir and shot extension | |
| US2296296A (en) | Molding process | |
| GB834723A (en) | Apparatus for die casting and moulding | |
| US3999923A (en) | Injection-molding apparatus | |
| US2798256A (en) | Injection moulding machines | |
| GB1060501A (en) | Improvements in or relating to methods and devices for feeding and metering plastifiable material to plastics molding machines | |
| GB951135A (en) | Injection moulding apparatus | |
| GB739943A (en) | Improvements in or relating to injection moulding machines | |
| GB1501747A (en) | Process and apparatus for moulding articles | |
| US2841824A (en) | Feed mechanism for injection molding machine | |
| GB888448A (en) | Improvements in injection moulding machines | |
| GB1220971A (en) | An injection moulding machine mould runner sprue ejection device | |
| GB1084322A (en) | ||
| GB995243A (en) | Improvements relating to injection moulding machines | |
| GB808369A (en) | Injection-moulding machines | |
| GB791557A (en) | Improvements in and relating to screw conveyors for injection moulding machines | |
| GB946194A (en) | Injection unit for filling moulds of injection moulding machines | |
| GB622207A (en) | Improvements in methods of coating or encasing substantially cylindrical objects by a pressure moulding process and mould arrangement for use in carrying out such methods | |
| GB1286888A (en) | Injection device for injection moulding machine | |
| GB1199445A (en) | Method of Producing Castings of Plasticisable Material. | |
| GB575643A (en) | Improvements relating to injection moulding machines | |
| GB1249503A (en) | Improvements in machines for automatic injection moulding |