GB489944A - Improvements in or relating to pressure casting apparatus - Google Patents
Improvements in or relating to pressure casting apparatusInfo
- Publication number
- GB489944A GB489944A GB315337A GB315337A GB489944A GB 489944 A GB489944 A GB 489944A GB 315337 A GB315337 A GB 315337A GB 315337 A GB315337 A GB 315337A GB 489944 A GB489944 A GB 489944A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plunger
- ram
- pressure
- mould
- vessel
- 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
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
489,944. Casting-machines. POLAK, J. Feb. 3, 1937, No. 3153. [Class 83 (i)] Clamping moulds .- Pressure-casting apparatus comprises mould parts A, B, the lower part B being yieldingly mounted and containing a pressure chamber D closed at the bottom by a press plunger G, the longitudinal axis whereof is in the direction of movement of a driving member which moves down the upper part A to close the mould and then continues to move the closed mould downwards relativelv to the plunger G so as to force metal from the chamber D through gates E into mould cavities C. The lower mould part B may be carried by rams K and normally pressed against abutments L by liquid under pressure in cylinders H. The plunger may be fixed to a base-plate M or attached to a ram supported in a hydraulic pressure cylinder. The upper mould part A is attached to a movable platen O fixed to a ram operated by a hydraulic cylinder P on the crosshead Q. Where the plunger is supported hydraulically, the platen O may be crankoperated. In another form, Fig. 3, the mould part B is supported on a hollow ram K in a hydraulic cylinder H and the plunger G is fixed to a ram G<1> sliding within the ram K and normally held down by a spring G<11>. The cylinder H is connected through a non- return valve H<1> with a low-pressure vessel H<11> and through a non-return valve T with a highpressure vessel U which carries a discharge pipe V and a safety valve W. As the mould and ram K fall, pressure is transmitted through the liquid to cause the plunger G to rise against the spring G<11>, the maximum pressure on the plunger being limited by the pressure in the vessel U. Towards the end of the ram stroke, the vessel U may be cut off, so that the final pressure of the plunger G is not limited. After pressing, the ram K is raised by liquid supplied from the vessel H<11>. The vessels U, H<11> may be connected to the hydraulic cylinder of the press or they may be directly connected to form a closed circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB315337A GB489944A (en) | 1937-02-03 | 1937-02-03 | Improvements in or relating to pressure casting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB315337A GB489944A (en) | 1937-02-03 | 1937-02-03 | Improvements in or relating to pressure casting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489944A true GB489944A (en) | 1938-08-03 |
Family
ID=9752940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB315337A Expired GB489944A (en) | 1937-02-03 | 1937-02-03 | Improvements in or relating to pressure casting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB489944A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2433654A (en) * | 1944-05-04 | 1947-12-30 | Watson Stillman Co | Injection molding machine |
| FR2221206A1 (en) * | 1973-03-16 | 1974-10-11 | Metal Castings Doehler Ltd | Mould closure load transmitted by compensator - to equalise pull on all rods and simplify adjustments |
| EP0691166A1 (en) | 1994-07-04 | 1996-01-10 | T.C.S. Molding Systems S.P.A. | Process and apparatus for pressure die-casting |
-
1937
- 1937-02-03 GB GB315337A patent/GB489944A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2433654A (en) * | 1944-05-04 | 1947-12-30 | Watson Stillman Co | Injection molding machine |
| FR2221206A1 (en) * | 1973-03-16 | 1974-10-11 | Metal Castings Doehler Ltd | Mould closure load transmitted by compensator - to equalise pull on all rods and simplify adjustments |
| EP0691166A1 (en) | 1994-07-04 | 1996-01-10 | T.C.S. Molding Systems S.P.A. | Process and apparatus for pressure die-casting |
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