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Method for indirectly manufacturing low-melting-point alloy mold

An alloy and mold technology is applied in the field of preparation of low-melting alloy molds, which can solve the problems of complex process and precision loss, and achieve the effects of high precision requirements, low cost and fine surface patterns.

Inactive Publication Date: 2012-11-28
KUNSHAN RUIJIE PRECISION MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has the advantages of being able to cast non-ferrous metal castings with high surface precision and complex shapes, and is easy to clean after pouring. It is often used in the manufacture of non-ferrous metal molds. The main disadvantage of the method of obtaining plaster molds by turning over the mold is that the process is complicated, and it is necessary to make a master mold, Turn over the silicone mold, pour the plaster mold, and then cast the metal casting after the plaster mold is obtained, and there is a loss of precision during the mold turning process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] step 1: First design the CAD model based on the actual object, and manufacture the laminated entity manufacturing prototype;

[0030] Step 2: Mix and stir the silicone rubber components in proportion, and make a silicone mold on a vacuum injection molding machine as an intermediate conversion mold;

[0031] Step 3: Weigh the gypsum mixture and water in proportion, and manufacture the gypsum core on the gypsum-type vacuum grouting equipment;

[0032] Step 4: Manufacture ceramic upper and lower bodies;

[0033] Step 5: Pouring in a box, pouring the tin-indium alloy melt, solidifying and cooling the alloy, and obtaining the tin-indium alloy mold;

[0034] The composition and ratio of the tin-indium alloy are as follows: 90wt% tin and 10wt% indium.

[0035] The preparation process of the gypsum core of step 3 wherein is specifically:

[0036] (1) Gypsum material ratio

[0037] Proportion of gypsum mixture: 7wt% white cement, 3wt% diatomaceous earth, the bala...

Embodiment 2

[0046] step 1: First design the CAD model based on the actual object, and manufacture the laminated entity manufacturing prototype;

[0047] Step 2: Mix and stir the silicone rubber components in proportion, and make a silicone mold on a vacuum injection molding machine as an intermediate conversion mold;

[0048] Step 3: Weigh the gypsum mixture and water in proportion, and manufacture the gypsum core on the gypsum-type vacuum grouting equipment;

[0049] Step 4: Manufacture ceramic upper and lower bodies;

[0050] Step 5: Combined box pouring, pouring tin-bismuth alloy melt, alloy solidification and cooling, to obtain tin-bismuth alloy mold;

[0051] The composition and ratio of the tin-bismuth alloy are as follows: 60wt% tin and 40wt% bismuth.

[0052] The preparation process of the gypsum core of step 3 wherein is specifically:

[0053] (1) Gypsum material ratio

[0054] Proportion of gypsum mixture: 8wt% white cement, 2wt% diatomaceous earth, the balance i...

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Abstract

The invention provides a method for manufacturing a low-melting-point alloy mold. The method comprises the following steps of: (1) designing a computer aided design (CAD) model according to a material object, and manufacturing a laminated object prototype; (2) mixing and stirring silicon rubber components according to a ratio, and manufacturing a silicon-rubber mold in a vacuum injection molding machine to serve as an intermediate conversion mold; (3) weighing gypsum mixture and water according to a ratio, and manufacturing a gypsum mold core on gypsum type vacuum grouting equipment; (4) manufacturing an upper ceramic mold and a lower ceramic mold; and (5) closing the mold and pouring, pouring alloy melt, solidifying and cooling the alloy to obtain the alloy mold. The indirect manufacturing method is suitable for manufacturing the low-melting-point metal mold which is complex in shape, fine in surface pattern and high in precision requirement and has wide application prospect and market prospect.

Description

technical field [0001] The invention relates to a method for preparing a low-melting-point alloy mold, more specifically, a method for indirectly preparing a low-melting-point alloy mold. Background technique [0002] Molds have formed a huge commercial market worldwide, reaching an output value of 80 billion US dollars worldwide. Molding technology can be divided into direct molding technology and indirect molding technology. [0003] There are many direct molding methods for traditional molds, such as CNC milling, EDM, wire cutting, electrolytic machining, electroforming, pressure machining and etching techniques. However, these technologies are complicated, time-consuming, and expensive, which affects the development progress of new products. However, due to the rough process, low precision and short life of the traditional rapid die, it is difficult to fully meet the requirements of users, and it is also difficult for the traditional rapid die to meet the rapid require...

Claims

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Application Information

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IPC IPC(8): B22C9/03
Inventor 郑霞
Owner KUNSHAN RUIJIE PRECISION MOLD
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