CN104815958A - Melted module precise casting process - Google Patents

Abstract

The invention relates to the technical field of casting, in particular to a melted module precise casting process which includes the steps: firstly, preparing a pattern material comprising, in percent, 40% of paraffin, 20% of stearic acid, 20% of ceresin and 20% of high-molecular polymer which are mixed at the temperature of 40-55 DEG C; secondly, pressing a melted module; thirdly, drying the pressed melted module; fourthly, repairing and checking the dried melted module; fifthly, manufacturing a shell; sixthly, roasting the shell at the temperature of 900-1000 DEG C for 3.5-4.5h; seventhly, casting product material alloy liquid into the shell; eighthly, cooling and solidifying the product material alloy liquid. The outside of the checked melted module is coated with refractory powder which is 280# coal gangue powder. The melted module precise casting process is reasonable in process route planning and scientific in pattern material formula, satisfaction of the practical mould filling state of a wax pattern can be effectively improved, and casting precision is further improved.

Description

A kind of investment precision casting technology

Technical field

The present invention relates to technical field of forging, be specifically related to a kind of investment precision casting technology.

Background technology

Investment precision casting technology is also referred to as model casting or lost-wax casting, and the product that this casting obtains is accurate, complicated, close to part final form, can not to process or directly processing just uses, and is an excellent technology in casting industry.But in existing precision-investment Forging Technology, also there is a lot of problem in mould material formula, the technological process aspect of model casting, causes the actual filling mould states of wax-pattern unsatisfactory, cause casting accuracy not high.

Summary of the invention

For solving the above-mentioned problems in the prior art, the invention provides a kind of investment precision casting technology.

Technique effect of the present invention is achieved through the following technical solutions:

A kind of investment precision casting technology, comprises the following steps:

Step one: configuration mould material, the component percentages of mould material component is paraffin 40%, stearic acid 20%, ceresine 20%, high molecular polymer 2%, and above each component mixes at 40-55 DEG C;

Step 2: fusible pattern injection;

Step 3: the fusible pattern after compacting is dried;

Step 4: the fusible pattern after drying is repaired a die, inspection;

Step 5: shell manufacture, described shell is fabricated to the fusible pattern after by inspection and schemes upper refractory powder outward, and described refractory powder is 275# colliery powder;

Step 6: Baking, temperature 900-1000 DEG C, time 3.5-4.5h;

Step 7: product material aluminium alloy of casting in shell;

Step 8: cooled and solidified.

Wherein, described high molecular polymer is polyethylene.

The invention has the beneficial effects as follows:

A kind of investment precision casting technology disclosed in this invention, Process Route Planning is reasonable, and mould material formula science, effectively can improve the actual filling mould states desired level of wax-pattern, and then improves casting accuracy.

Detailed description of the invention

The present invention is realized by following detailed description of the invention:

A kind of investment precision casting technology, comprises the following steps:

Step one: configuration mould material, the component percentages of mould material component is paraffin 40%, stearic acid 20%, ceresine 20%, high molecular polymer 2%, and above each component mixes at 40-55 DEG C;

Step 2: fusible pattern injection;

Step 3: the fusible pattern after compacting is dried;

Step 4: the fusible pattern after drying is repaired a die, inspection;

Step 5: shell manufacture, described shell is fabricated to the fusible pattern after by inspection and schemes upper refractory powder outward, and described refractory powder is 275# colliery powder;

Step 6: Baking, temperature 900-1000 DEG C, time 3.5-4.5h;

Step 7: product material aluminium alloy of casting in shell;

Step 8: cooled and solidified.

Wherein, described high molecular polymer is polyethylene.

Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. an investment precision casting technology, is characterized in that: comprise the following steps:

Step one: configuration mould material, the component percentages of mould material component is paraffin 40%, stearic acid 20%, ceresine 20%, high molecular polymer 2%, and above each component mixes at 40-55 DEG C;

Step 2: fusible pattern injection;

Step 3: the fusible pattern after compacting is dried;

Step 4: the fusible pattern after drying is repaired a die, inspection;

Step 5: shell manufacture, described shell is fabricated to the fusible pattern after by inspection and schemes upper refractory powder outward, and described refractory powder is 275# colliery powder;

Step 6: Baking, temperature 900-1000 DEG C, time 3.5-4.5h;

Step 7: product material aluminium alloy of casting in shell;

Step 8: cooled and solidified.

2. a kind of investment precision casting technology according to claim 1, is characterized in that: described high molecular polymer is polyethylene.