Unlock instant, AI-driven research and patent intelligence for your innovation.

A copper alloy casting investment casting process

A technology of investment casting and copper alloy, which is applied in the field of investment casting of copper alloy castings, can solve problems such as complex process, and achieve the effects of good toughness, good thermal conductivity and low coefficient of friction

Active Publication Date: 2017-08-25
NINGBO TIANYE PRECISION CASTING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complexity of the investment casting process, there are many factors that affect the dimensional accuracy of the casting, such as the shrinkage of the mold material, the deformation of the investment mold, the change of the wire amount of the shell during the heating and cooling process, the shrinkage rate of the alloy, and the solidification process. Therefore, although the dimensional accuracy of investment castings is high, its consistency still needs to be improved.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A copper alloy casting investment casting process
  • A copper alloy casting investment casting process
  • A copper alloy casting investment casting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Step 1, mold development, the present invention adopts VMCL 600 vertical machining center bed type CNC milling machine to set up molds, such as some precision parts of auto parts castings.

[0058] Step 2, mold making, using the mold to inject wax to prepare a wax model of the product, which is the investment molding process. First configure the mold material, the weight of the mold material is as follows:

[0059]

[0060] When configuring the above substances, an electric hot water bath melting device is used, and the specific operation steps are as follows:

[0061] S1: Weigh the above-mentioned substances in proportion, put the above-mentioned substances into a clean water-bath stainless steel or aluminum crucible, and melt with electricity;

[0062] S2: After the mold material is melted, stir evenly, and the maximum temperature of the mold material should be controlled at 95°C;

[0063] S3: filter the molten molding material with a 120-mesh sieve to remove imp...

Embodiment 2

[0086] Step 1, mold development, the present invention adopts VMCL 600 vertical machining center bed type CNC milling machine to set up molds, such as some precision parts of auto parts castings.

[0087] Step 2, mold making, using the mold to inject wax to prepare a wax model of the product, which is the investment molding process. First configure the mold material, the weight of the mold material is as follows:

[0088]

[0089] When configuring the above substances, an electric hot water bath melting device is used, and the specific operation steps are as follows:

[0090] S1: Weigh the above-mentioned substances in proportion, put the above-mentioned substances into a clean water-bath stainless steel or aluminum crucible, and melt with electricity;

[0091] S2: After the mold material is melted, stir evenly, and the maximum temperature of the mold material should be controlled at 95°C;

[0092] S3: filter the molten molding material with a 120-mesh sieve to remove imp...

Embodiment 3

[0115] Step 1, mold development, the present invention adopts VMCL 600 vertical machining center bed type CNC milling machine to set up molds, such as some precision parts of auto parts castings.

[0116] Step 2, mold making, using the mold to inject wax to prepare a wax model of the product, which is the investment molding process. First configure the mold material, the weight of the mold material is as follows:

[0117]

[0118] When configuring the above substances, an electric hot water bath melting device is used, and the specific operation steps are as follows:

[0119] S1: Weigh the above-mentioned substances in proportion, put the above-mentioned substances into a clean water-bath stainless steel or aluminum crucible, and melt with electricity;

[0120] S2: After the mold material is melted, stir evenly, and the maximum temperature of the mold material should be controlled at 100°C;

[0121] S3: filter the molten mold material with a 100-mesh sieve to remove impur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a copper alloy casting investment casting process, using chlorinated paraffin, Fischer-Tropsch wax, stearic acid, rosin glyceride, microcrystalline wax, polypropylene wax, polyisobutylene, polyurethane elastomer and polyaldehyde resin as the Molding material, polyisobutylene, polyurethane elastomer, polyaldehyde resin interspersed in chlorinated paraffin wax, Fischer-Tropsch wax, microcrystalline wax, polypropylene wax and stearic acid, the formed structure has good strength and thermal stability. For the coating used in the present invention, cristobalite has complete chemical inertness, and it will not crack under extremely high temperature. Fused corundum has the advantages of high melting point, compact structure, good thermal conductivity, etc., and the thermal expansion rate is small and uniform; nitrogen Boron has a very low coefficient of friction, good high temperature stability, good thermal shock resistance, high strength, high thermal conductivity, and low expansion coefficient. Therefore, the copper alloy casting obtained by the investment casting process of the copper alloy casting provided by the present invention has high strength, good toughness, no cracks on the surface, and reliable product quality.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to an investment casting process for copper alloy castings. Background technique [0002] Investment casting, also known as "lost wax casting", is an ancient casting method. The earliest investment casting found in my country was in the early Warring States period more than 2,400 years ago. Since the 1950s, investment casting has been gradually used in industrial production. After decades of development, investment casting has become a basic process in my country's machinery manufacturing industry and has formed a unique industry. Investment casting is widely used in manufacturing industries such as aviation, automobiles, machine tools, ships, internal combustion engines, gas turbines, telecommunication instruments, weapons, medical equipment and knives, and is also used in the manufacture of arts and crafts. [0003] The so-called investment casting process, simply put, is to use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C3/00
Inventor 崔建业
Owner NINGBO TIANYE PRECISION CASTING