Isostatic pressing film-bag unstressed die
A film bag, stress-free technology, applied in the direction of presses, manufacturing tools, etc., can solve the problem that the thickness of the isostatic pressing mold cannot be taken into account, and achieve the effect of saving the preforming process, improving the density, and simplifying the forming process
Active Publication Date: 2016-11-23
山西金开源实业有限公司
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Problems solved by technology
[0011] The invention solves the problem that the thickness of the existing isostatic pressing mold cannot maintain a certain rigidity and uniformly transmit the static pressure, and provides an isostatic pressing film bag stress-free mold
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[0019] The isostatic film bag stress-free mold is composed of a porous breathable rigid former 1 and a film bag 2 lined in the mold cavity of the former; the film bag 2 is divided into the inner part of the former cavity and the outer part of the former cavity; The shape and volume of the inner part of the master mold cavity of the film bag are suitable for the mold cavity of the master mold 1, so that the powder is added into the film bag and the shape of the powder after shaking or tamping is consistent with the shape of the mold cavity of the master mold. It will not be affected by the bad bonding between the inner part of the film bag and the inner wall of the former; the length of the outer part of the film bag meets the requirements of vacuum packaging at the mouth of the film bag. The isostatic film bag stress-free mold also includes a vacuum tank 3 with an exhaust pipe 7 at the bottom, the vacuum tank 3 is equipped with a sealing gland 5 with a ring hole on it, and a po...
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The invention relates to a fixture matched with an isostatic pressing machine, that is, an isostatic pressing die, specifically relates to an isostatic pressing film-bag unstressed die, and solves the problem that the thickness of an existing isostatic pressing die cannot keep rigidity to a certain extent and uniformly transfer a static pressure simultaneously. The die is composed of a porous and breathable rigid mould and a film bag lined in a mould cavity of the mould, and further comprises a vacuum tank provided with an exhaust tube, wherein the vacuum tank is equipped with a sealing gland in which a ring hole is formed; the mould in which through holes are uniformly distributed is located in the vacuum tank; the sealing gland is hermetically arranged at a port of the mould cavity of the mould in a pressing manner and the ring hole in the sealing gland is aligned with the mould cavity of the mould; and the outer part of the mould cavity of the mould of the film bag is led out from the ring hole in the middle part of the gland. The die disclosed by the invention solves the problem in the existing isostatic pressing die, and is novel and unique in structural design. With the adoption of the die disclosed by the invention, a pre-forming procedure can be omitted, thus an isostatic pressing forming procedure for a powder of a non-circular workpiece is simplified, and a better shape and a more uniform density can also be obtained for a circular workpiece.
Description
technical field [0001] The invention relates to an isostatic pressing mold, a tooling matched with an isostatic pressing machine; the powder is put into the mold, and then the mold is put into the isostatic pressing machine to realize the isostatic pressing of the powder, specifically an isostatic pressing film bag Stress free mold. Background technique [0002] Isostatic pressing, like other powder forming techniques, also requires the use of molds. Put the powder in the mold to achieve a certain initial density through vibration or proper extrusion, so that it has a fixed shape and seal it, and then put it in the high-pressure chamber of the isostatic press. The static pressure of the liquid pressure medium in the high-pressure chamber The pressure is transferred to the powder through the mold to realize isostatic pressing. The isostatic pressing mold needs to transmit static pressure through deformation to realize the isostatic pressing of powder, so it is usually made ...
Claims
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IPC IPC(8): B30B12/00B30B15/02
CPCB30B12/00B30B15/024
Inventor 董中天
Owner 山西金开源实业有限公司