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Jet pumps for hot chamber die casting of corrosive light alloys

A hot-chamber die-casting, jet pump technology, applied in the field of jet pumps, can solve problems such as deterioration of sealing surfaces

Inactive Publication Date: 2016-03-09
F·曼奇尼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] None of the solutions proposed so far have achieved industrial development due to the rapid deterioration of the sealing surfaces

Method used

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  • Jet pumps for hot chamber die casting of corrosive light alloys
  • Jet pumps for hot chamber die casting of corrosive light alloys
  • Jet pumps for hot chamber die casting of corrosive light alloys

Examples

Experimental program
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Embodiment Construction

[0033] refer to figure 1 , it can be seen that the hot chamber jet pump 1 according to the invention generally comprises a body 9 inserted into a crucible 13 and provided with an inner bush 10 coaxial therewith, the injector piston 20 being driven by an actuator 26 through a rod 21 slides in the inner bushing 10 in a reciprocating manner. The piston 20 has the function of pushing and compressing the molten alloy 19 into a cavity 24 of a mold 25 connected to the pump 1 through a conduit 22 provided with an external heating jacket 23, the molten alloy 19 being present under the piston 20 by The inner volume of the bushing 10 forms the injection chamber 102 . Ejection chamber 102 is connected to conduit 22 by conduit 14 formed in body 9, and communicates with the chamber of crucible 13 by conduit 12, conduit 12 passing through liner 10 and body 9, during the return stroke of piston 20 alloy 19 is usually due to Gravity or suction enters the spray chamber 102 through the conduit...

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PUM

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Abstract

An injection pump for the hot-chamber die casting of corrosive light alloys includes a body provided with an internal coaxial liner where an injector piston sealingly slides. The liner being made of a material resistant to the molten alloy and has a coefficient of thermal expansion different from the material of the body. Static sealing elements, made of a graphite-based non-metallic material that yields under compression, are arranged between the internal surface of the body and the external surface of the liner. The pump also has axial compression means arranged between a ring nut screwed into the body and the liner and the static sealing elements.

Description

technical field [0001] The invention relates to an injection pump for installations for hot chamber die casting of light alloys which are corrosive in the molten or semi-liquid state, and in particular to an injection pump equipped with static sealing elements which The elements are non-metallic and deformable under compression. Background technique [0002] In injection pumps for die casting of molten non-ferrous alloys, in order to construct the injector piston, the container cylinder and the dynamic sealing elements arranged between them, the materials currently used are resistant to high temperatures and can withstand being in a molten or semi-liquid state Corrosion of the alloy, resistance to wear and prevent or impede possible scratching (seizure) caused by the friction of relatively moving parts, and contain the leakage of the alloy, so as to obtain an economically acceptable service life of these parts. [0003] In so-called "hot chamber" installations, the injectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/04B22D17/30
CPCB22D17/04B22D17/203B22D17/30
Inventor F·曼奇尼
Owner F·曼奇尼
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