Self-temperature regulating mould and using method thereof

A mold and self-adjusting technology, which is applied in the direction of manufacturing tools, coatings, casting molding equipment, etc., can solve difficult problems such as pure metals, and achieve the effects of simple molds, convenient installation and operation, and energy saving

Inactive Publication Date: 2012-04-04
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, it is difficult to find a pure metal whose solidification temperature is exactly the same as the temperature expected by the mold

Method used

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  • Self-temperature regulating mould and using method thereof
  • Self-temperature regulating mould and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, tin-bismuth alloy is used as the temperature-regulating metal to die-cast A356 aluminum alloy. Die-casting A356 aluminum alloy requires the material of mold body 1 to be H13 steel, the required minimum working temperature T1=130°C, and the maximum working temperature T2=225°C . Accordingly, the present invention selects the tin-bismuth alloy whose solidification temperature range is Ts=139° C. and TL=170° C. as the temperature-regulating metal. The method of use is: assemble the mold jacket 2 coated with heat-insulating paint 0.1mm thick and the mold body 1 coated with heat-conducting paint 0.1mm thick, and fix and seal firmly to form a temperature-adjusting chamber 8 with a volume 8 times the volume of the workpiece . After the selected temperature-regulating metal is melted and superheated to 10° C. (ie 180° C.) above the melting temperature, the temperature-regulating cavity 8 between the mold jacket 2 and the mold body 1 is filled and closed wit...

Embodiment 2

[0043] In this embodiment, bismuth metal is used as the temperature-regulating metal to carry out extrusion casting of 45 steel parts. The extrusion casting of 45 steel parts requires the material of mold body 1 to be 3Cr2W8V steel, the minimum working temperature T1=200°C, and the maximum working temperature T2=320°C . According to this, the present invention selects bismuth with a solidification temperature of 271° C. as the temperature-regulating metal. The method of use is as follows: the mold jacket 2 coated with a heat-insulating coating 0.1 mm thick and the mold body 1 coated with a heat-conducting coating 0.1 mm thick are assembled together and fixed. And seal firmly, form the temperature adjustment cavity 8 that can hold the volume of 4 times of workpiece quality. After the selected temperature-regulating metal is melted and superheated to 50° C. (ie 320° C.) above the melting temperature, the temperature-regulating cavity between the mold jacket 2 and the mold body 1...

Embodiment 3

[0045] In this embodiment, the temperature-regulating metal is eutectic tin-bismuth alloy, die-cast ZAMAK3 zinc alloy, and the mold body 1 is made of 3Cr5MoSiV hot work die steel. The minimum working temperature T1=120°C and the maximum working temperature T2=200°C are required. Accordingly, the present invention selects the eutectic tin-bismuth alloy whose solidification temperature is 139° C. as the temperature-regulating metal. The method of use is: assemble the mold jacket coated with heat-insulating paint 0.1mm thick and the mold body coated with heat-conducting paint 0.1mm thick, fix and seal firmly, and form a temperature-regulating cavity that can accommodate twice the mass of the workpiece. After the selected temperature-regulating metal is melted and superheated to 100° C. (ie 239° C.) above the melting temperature, the temperature-regulating cavity between the mold jacket 2 and the mold body 1 is filled and closed with a closing plug 9 . The temperature-adjusted met...

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Abstract

The invention relates to a self-temperature regulating mould and a using method thereof. The self-temperature regulating mould comprises a mould body and a mould jacket, wherein a mould cavity for forming a workpiece is formed in the mould body; a heat-conducting coating layer is arranged on the external surface of the mould body; the mould jacket is arranged on the outer side of the mould body; a plurality of support pillars are arranged on the inner wall of the mould body; the ends of the support pillars are pressed against the outer wall of the mould body; heat-insulating coating layers are arranged on the inner wall of the mould jacket and the outer walls of the support pillars; temperature regulating metal is filled in a temperature regulating cavity formed between the mould jacket and the mould body; and a closing plug is arranged on the mould jacket on the top of the temperature regulating cavity. The self-temperature regulating mould has an adaptive temperature regulating function and is high in safe reliability; an instrument is not needed in the temperature regulating process, and reliability is high; the temperature regulating metal is non-toxic, pollution-free and incombustible and is safely used; the mould has infinite service life; and the temperature range of the mould is convenient to regulate.

Description

technical field [0001] The invention relates to a self-temperature-regulating mold device, in particular to a self-temperature-regulating mold and a use method thereof. Background technique [0002] The mold is an essential tooling in liquid forging, die casting and metal mold casting. The temperature of the mold has an important impact on the forming quality and the life of the mold. The higher the melting point of the forming technology, the more severe the thermal shock and thermal damage to the mold. Especially in die casting, extrusion casting and liquid die forging of high melting point alloys such as iron and steel, the life of the die is generally only a few thousand dies due to the high temperature of the die, the economic effect is not ideal, and there are still few industrial applications so far. How to control the mold temperature to keep it stable within a certain temperature range is a common concern in the molding of materials. [0003] In the prior art, in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06B22C3/00B22D17/22B22D18/02B22D27/04B22D30/00
Inventor 邢书明赵宁鲍培伟肖江王占涛王新春
Owner BEIJING JIAOTONG UNIV
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