GB631641A - Improvements in or relating to pressure casting machines - Google Patents
Improvements in or relating to pressure casting machinesInfo
- Publication number
- GB631641A GB631641A GB28047/47A GB2804747A GB631641A GB 631641 A GB631641 A GB 631641A GB 28047/47 A GB28047/47 A GB 28047/47A GB 2804747 A GB2804747 A GB 2804747A GB 631641 A GB631641 A GB 631641A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- switch
- pressure
- injection
- lever
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/80—Measuring, controlling or regulating of relative position of mould parts
Abstract
631,641. Injection-moulding machines. LESTER ENGINEERING CO. Oct. 20, 1947, No. 28047. Convention date, Dec. 13, 1943. [Class 87 (ii)] [Also in Group XXIII] The die-blocks 4, 5 of a pressure casting machine are so arranged that slight relative movement causes a variation in the pressure applied to the material in the die-cavity, e.g. by actuating an electric switch. Mounted on a stationary die 4 is an adjustable device 14 having a lever 29, Fig. 3, pulled by a spring 31 so that its short arm engages the long arm of a lever 25 of which the short arm engages a slide 23 which engages the movable mould part 5 when the mould is closed. The lever 29 is so connected to a micro switch 15 that when the mould is closed the switch is open and the valves 59 and 60, Fig. 4, are in the position shown so that the fluid pressure supplied by the pump 43 to the cylinder 11 which actuates the injection plunger 12 is kept at a value determined by a pre-set relief valve 53. If however the pressure in the mould causes its parts to begin to separate, the switch 15 is closed causing a solenoid 41 to move the valve 59 to the right which causes the valve 60 to move to the left and connect the pump to exhaust 54 thus stopping injection. If the mould-closing means 7, 8, Fig. 1, should move the parts 4, 5 into close contact again, the switch 15 will open and injection pressure be again applied.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US631641XA | 1943-12-13 | 1943-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB631641A true GB631641A (en) | 1949-11-07 |
Family
ID=22047361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28047/47A Expired GB631641A (en) | 1943-12-13 | 1947-10-20 | Improvements in or relating to pressure casting machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB631641A (en) |
-
1947
- 1947-10-20 GB GB28047/47A patent/GB631641A/en not_active Expired
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