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Pistons for die casting machines with cold chamber

A technology for die-casting machines and pistons, applied in the direction of pistons, cylindrical pistons, plungers, etc., which can solve problems such as complex manufacturing, frequent maintenance, repair of pipelines, and damage and blockage of lubricating nozzles

Active Publication Date: 2016-01-20
库珀罗麦克压铸股份独资公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even these embodiments of the piston have proven to be unsatisfactory, especially in view of the fact that the end portion of the lubricant duct facing the sealing surface of the piston is quickly blocked by metal, which in liquid state Oozes between piston and container and solidifies to form a thin layer that plugs lubrication ducts
[0011] Pistons with lubricating sleeves turned out to be complex to manufacture and required frequent maintenance, especially repairing broken and clogged pipes and lubricating nozzles

Method used

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  • Pistons for die casting machines with cold chamber
  • Pistons for die casting machines with cold chamber
  • Pistons for die casting machines with cold chamber

Examples

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Embodiment Construction

[0044] In the continuation of this specification, components common to various embodiments of the present invention will be denoted by the same reference numerals when possible.

[0045] Furthermore, components described with respect to one piston embodiment may also be present in other piston embodiments described (modified as necessary) unless specifically stated otherwise.

[0046] Referring to the accompanying drawings, reference numerals 1; 500; 700 designate a piston of a press of a die-casting machine (in particular, of the cold chamber type). The press comprises a container 400 in which the piston 1; 500; 700 or at least the molten metal end thrust portion of said piston is housed so as to slide. The vessel 400 has a fill port for molten metal, such as aluminum, formed in the upper portion and at one end. At the end opposite said filling port, the container 400 has a slit 402 corresponding to the start of the casting branch emerging in the mould. The piston 1; 500; 7...

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Abstract

Piston for a die-casting machine, in particular with a cold chamber, comprising a rod extending along the piston axis from a proximal end to a distal end and a piston head extending from the distal end of the rod and having a side wall having At least one sealing area adapted to form a seal on the wall of said container of the press. A lubrication circuit adapted to facilitate sliding of the piston includes a first lubrication conduit formed in the stem and terminating at a distal end of the stem, and a first lubrication conduit formed in the head of the piston in fluid communication with the first conduit and at the A second conduit protruding from at least the side wall corresponding to the sealing area.

Description

technical field [0001] The invention relates to pistons for die casting machines, in particular of the cold chamber type. In particular, the invention relates to a piston with a lubricating circuit adapted to facilitate the sliding of the piston in a container of molten metal for a press of such a die-casting machine. Background technique [0002] A piston for a die casting machine includes a rod portion and a piston head having a side wall with at least one sealing area adapted to form a seal on a container wall of the press. Pistons which are also provided with a lubrication circuit are known. [0003] In particular, it is known to manufacture pistons with a lubricating sleeve arranged around the stem in a position behind the head so as not to interfere with the sealing action performed by the head on the container wall. A lubrication duct is formed in the stem which branches into a series of holes emerging in the sleeve. Lubricant is sprayed towards the head through mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/20
CPCB22D17/203B22D17/2038F16J1/08
Inventor 卡洛·斯基瓦洛基基亚拉·斯基瓦洛基尼古拉·斯基瓦洛基
Owner 库珀罗麦克压铸股份独资公司