Method of vacuum pouring screw rod castings by adopting epoxy resin

A technology of vacuum casting and epoxy resin, which is applied in the field of pouring screw castings. It can solve the problems of heavy metal screw, high heat generated by metal friction, and easy jamming. It achieves good thermal stability, good dimensional performance, and reduces equipment energy consumption. The effect of improving economic efficiency

Inactive Publication Date: 2018-04-20
徐洪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The screw is the main rotating part of the compressor and vacuum pump. During high-speed operation, the material of the screw must have high strength, high temperature resistance, and high wear resistance. However, the traditional screw is generally made of metal, and the wear rate of the metal screw is large during use. Oil is required for lubrication. The oil-gas separation technology used in high-end fields cannot achieve 100% separation in the true sense, and some oil remains, which is easy to pollute the application end
[0004] Ordinary metal screws are used in oil-free compressors or oil-free vacuum pumps. Under oil-free lubrication conditions, very

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for vacuum pouring screw castings using epoxy resin, comprising the steps of:

[0016] The first step, raw material pretreatment: dry the epoxy resin in a vacuum oven at 50°C for 24 hours;

[0017] The second step, mixing: Add 5 parts by mass of molybdenum disulfide and 65 parts by mass of carbon fiber nanotubes to the 100 parts by mass of epoxy resin prepared in the first step and disperse them by ultrasonic stirring for 2 hours, and place the mixture in a vacuum oven at 50 °C Dry in medium for 12 hours to obtain a primary mixture, the primary mixture is subjected to vacuum defoaming treatment; 25 parts by mass of curing agent are added to the primary mixture after vacuum defoaming, stirred for 1 hour to obtain a secondary mixture, and the secondary mixture is carried out Vacuum defoaming treatment;

[0018] The third step, pouring: Put the mold assembled and preheated to 80°C into the vacuum pouring tank, the pouring tank is vacuumed below 1330Pa, and the te...

Embodiment 2

[0023] A method for vacuum pouring screw castings using epoxy resin, comprising the steps of:

[0024] The first step, raw material pretreatment: dry the epoxy resin in a vacuum oven at 60°C for 24 hours;

[0025] The second step, mixing: add 10 mass parts of molybdenum disulfide, 65 mass parts of carbon fiber nanotubes, and 35 mass parts of graphite to the 100 mass parts of epoxy resin prepared in the first step and disperse them by ultrasonic stirring for 3 hours, mix the The material was dried in a vacuum oven at 60°C for 10 hours to obtain a primary mixture, and the primary mixture was subjected to vacuum defoaming treatment; 30 parts by mass of curing agent were added to the primary mixture after vacuum defoaming, and stirred for 1 hour to obtain a secondary mixture. Carry out vacuum defoaming treatment to the secondary mixture;

[0026] The third step, pouring: Put the mold assembled and preheated to 90°C into the vacuum pouring tank, the pouring tank is vacuumed below ...

Embodiment 3

[0031] A method for vacuum pouring screw castings using epoxy resin, comprising the steps of:

[0032] The first step, raw material pretreatment: dry the epoxy resin in a vacuum oven at 80°C for 24 hours;

[0033] The second step, mixing materials: add 10 mass parts of molybdenum disulfide, 65 mass parts of carbon fiber nanotubes, 35 mass parts of graphite, 20 mass parts of graphene in the 100 mass parts of epoxy resin obtained in the first step and ultrasonically Stir and disperse for 3 hours, dry the mixture in a vacuum oven at 80°C for 6 hours to obtain a primary mixture, and perform vacuum defoaming treatment on the primary mixture; add 35 parts by mass of curing agent to the primary mixture after vacuum defoaming, and stir for 1.5 hour to obtain the secondary mixture, the secondary mixture is subjected to vacuum defoaming treatment;

[0034] The third step, pouring: Put the mold assembled and preheated to 90°C into the vacuum pouring tank, the pouring tank is vacuumed be...

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Abstract

The invention discloses a method of vacuum pouring screw rod castings by adopting epoxy resin. The method sequentially comprises the steps that vacuum drying treatment is conducted on the epoxy resin;auxiliary materials are added for two times, material mixing for two times and vacuum defoaming treatment for two times are conducted successively; pouring is conducted under a vacuum state; then solidifying for two times is conducted; and finally, demoulding cooling is conducted. The screw rod castings prepared by adopting the method are exclusively used for oilless compressors or oilless vacuumpumps and the like and pay attraction to the situation that under working conditions of 24-hour uninterrupted high-speed rotation, high temperature and oilless lubrication, and the screw rod castingsare high in thermal stability size performance, low in friction coefficient, long in service life, green and environmentally friendly and have no pollution to equipment and terminal products; in addition, due to the fact that the mass of the epoxy resin is about 20% of a metal material, the screw rod castings prepared by adopting the method are low in mass, and can greatly reduce energy consumption of the equipment and improve economic benefits of industrial production.

Description

technical field [0001] The invention relates to a method of pouring screw castings. Background technique [0002] The oil or no oil of the compressor and vacuum pump generally refers to the amount of oil in the gas discharged from the compressor. Generally, the oil content of the oil machine is relatively large, and the oil content of the oil-free machine is 0.01ppm. Oil-free machines are increasingly used in applications that require very high air quality, such as food, medicine and cotton spinning industries. [0003] The screw is the main rotating part of the compressor and vacuum pump. During high-speed operation, the material of the screw must have high strength, high temperature resistance, and high wear resistance. However, the traditional screw is generally made of metal, and the wear rate of the metal screw is large during use. Oil is required for lubrication. The oil-gas separation technology used in high-end fields cannot achieve 100% separation in the true sense...

Claims

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Application Information

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IPC IPC(8): B29C39/02B29C39/22B29C39/42C08L63/00C08K3/30C08K7/24C08K3/04B29L1/00
CPCB29C39/02B29C39/22B29C39/42B29L2001/00C08K3/04C08K3/30C08K7/24C08L63/00
Inventor 徐康博
Owner 徐洪
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