Plastic pressure reducer and manufacturing method of plastic pressure reducer

A technology of pressure reducer and plastic, applied in the field of pressure reducer and its preparation, can solve the problems of troublesome processing technology, high production cost and heavy weight of the pressure reducer.

Active Publication Date: 2014-03-26
NINGBO LONGXING WELDING CUTTING TECH STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the pressure reducers on the market are basically made of copper. Although the hardness of this pressure reducer is high, other performances are average, the weight is large, and the processing technology is relatively troublesome, and the production cost of this pressure reducer higher

Method used

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  • Plastic pressure reducer and manufacturing method of plastic pressure reducer
  • Plastic pressure reducer and manufacturing method of plastic pressure reducer
  • Plastic pressure reducer and manufacturing method of plastic pressure reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The raw materials were weighed according to the components and parts by weight of Example 1 in Table 1, and the polyoxymethylene was dried in an oven at a temperature of 70° C. for 2-4 hours. At the same time, heat the barrel in the high-speed injection molding machine to 185°C, and then weigh the toughening agent, wear-resistant agent, compatibilizer, flame retardant, antistatic agent, stabilizing modifier and polyoxymethylene after drying Mix well and add to the barrel, heat to molten state, and inject twice through the nozzle of the hot runner at 220°C into the shell and cover mold at 90°C, where the first injection pressure is 110MPa, The second injection pressure is 90 MPa. Then keep it under the pressure of 100MPa for 8S, then cool down for 35S, and open the mold to make the shell and cover. Finally, the prepared shell and cover are assembled with an air inlet pipe, an air outlet pipe, a throttle valve, a gas high pressure gauge, and a gas low pressure gauge to f...

Embodiment 2

[0044] The raw materials were weighed according to the components and parts by weight of Example 2 in Table 1, and the polyoxymethylene was dried in an oven at a temperature of 70° C. for 2-4 hours. At the same time, heat the barrel in the high-speed injection molding machine to 185°C, and then weigh the toughening agent, wear-resistant agent, compatibilizer, flame retardant, antistatic agent, stabilizing modifier and polyoxymethylene after drying Mix well and add to the barrel, heat to molten state, and inject twice through the nozzle of the hot runner at 220°C into the shell and cover mold at 90°C, where the first injection pressure is 110MPa, The second injection pressure is 90 MPa. Then keep it under the pressure of 100MPa for 8S, then cool down for 35S, and open the mold to make the shell and cover. Finally, the prepared shell and cover are assembled with an air inlet pipe, an air outlet pipe, a throttle valve, a gas high pressure gauge, and a gas low pressure gauge to f...

Embodiment 3

[0046] The raw materials were weighed according to the components and parts by weight of Example 3 in Table 1, and the polyoxymethylene was dried in an oven at a temperature of 70°C for 2-4 hours. At the same time, heat the barrel in the high-speed injection molding machine to 185°C, and then weigh the toughening agent, wear-resistant agent, compatibilizer, flame retardant, antistatic agent, stabilizing modifier and polyoxymethylene after drying Mix well and add to the barrel, heat to molten state, and inject twice through the nozzle of the hot runner at 220°C into the shell and cover mold at 90°C, where the first injection pressure is 110MPa, The second injection pressure is 90 MPa. Then keep it under the pressure of 100MPa for 8S, then cool down for 35S, and open the mold to make the shell and cover. Finally, the prepared shell and cover are assembled with an air inlet pipe, an air outlet pipe, a throttle valve, a gas high pressure gauge, and a gas low pressure gauge to for...

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Abstract

The invention relates to a plastic pressure reducer which comprises a shell, a cover, an air inlet pipe, an air outlet pipe and a throttling valve. The shell and the cover are made of modified polyformaldehyde engineering plastic which comprises, by weight, 80-100 parts of polyformaldehyde, 5-15 parts of flexibilizers, 3-5 parts of wear-resisting agents, 5-8 parts of compatilizers, 3-5 parts of fire retardants, 3-5 parts of antistatic agents and 5-10 parts of stabilizing modifying agents. The manufacturing method includes the steps of firstly weighing the raw materials, drying the polyformaldehyde, evenly mixing the raw materials, adding the raw materials into a pre-heated charging barrel of a high-speed injection molding machine, heating the raw materials to be in the fusing state, injecting the fused raw materials into hot moulds of the shell and the cover in two times through nozzles of hot runners, manufacturing the shell and the cover after pressure maintaining, cooling molding and mould opening are carried out, and finally conducting assembling to form the plastic pressure reducer. The shell and the cover of the manufactured plastic pressure reducer are made of the modified polyformaldehyde engineering plastic, the modified polyformaldehyde engineering plastic is low in cost and easy to obtain, and the plastic pressure reducer is easy to machine, light in weight, low in cost, good in performance and long in service life.

Description

technical field [0001] The invention relates to a pressure reducer and a preparation method thereof, in particular to a plastic pressure reducer and a preparation method thereof. Background technique [0002] The pressure reducer is a regulating device that reduces the high-pressure gas stored in the gas cylinder to the required pressure when gas cutting or gas welding is used, and keeps the output gas pressure and flow rate stable. At present, the pressure reducers on the market are basically made of copper. Although the hardness of this pressure reducer is high, other performances are average, the weight is large, and the processing technology is relatively troublesome, and the production cost of this pressure reducer higher. Contents of the invention [0003] Aiming at the defects in the prior art, the invention provides a plastic pressure reducer with light weight, easy processing, low cost and good performance. [0004] The above purpose of the present invention can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K27/02F16K27/12C08L59/00C08L59/04B23K5/22B23K7/10
CPCB29C45/00C08K2201/017C08L59/00C08L59/04C08L2201/02C08L2205/035F16K27/02F16K27/08
Inventor 张建达
Owner NINGBO LONGXING WELDING CUTTING TECH STOCK
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