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Preparation process of sensor shell

A preparation process and sensor technology, applied in the field of preparation technology of sensor shells, can solve the problems of large molding shrinkage, poor dimensional stability, long molding cycle, etc., to improve room temperature and low temperature impact strength, improve rigidity and wear resistance, The effect of speeding up the crystallization rate

Active Publication Date: 2019-05-31
绍兴振荣汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyethylene terephthalate has problems such as high glass transition temperature, slow crystallization speed, long molding cycle, long molding cycle, large molding shrinkage, and poor dimensional stability.
As a result, when making the sensor housing, the temperature of the sensor housing cannot be crystallized and cooled quickly because the sensor housing that has just been pressed is provided with a through hole in the middle, so the sensor housing is still in a certain molten state, and there is a situation of inward collapse. Affects the product qualification rate of the sensor housing

Method used

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  • Preparation process of sensor shell
  • Preparation process of sensor shell
  • Preparation process of sensor shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The plastic particles include raw materials of the following weight components: 40 parts of polybutylene terephthalate, 35 parts of polyethylene terephthalate, 50 parts of polyamide, 25 parts of random copolymerized polypropylene, 20 parts of glass fiber 8 parts, 8 parts of calcium carbonate whiskers, 8 parts of nucleating agent, 8 parts of nanometer calcium carbonate powder, 3 parts of citric acid ester, 3 parts of benzophenone, 0.3 parts of sodium stearate, 0.3 parts of phosphite, thio 0.15 parts of dilauryl dipropionate.

[0067] The nucleating agent includes an alpha crystal nucleating agent and a beta crystal nucleating agent, the alpha crystal nucleating agent accounts for 40% of the total weight of the nucleating agent, and the beta crystal nucleating agent accounts for 60% of the total nucleating agent.

[0068] The alpha crystal form nucleating agent comprises the following raw materials in weight percentage: 35% of sodium benzoate, 40% of maleic anhydride, and...

Embodiment 1

[0087] The difference between Examples 10-13 and Example 1 is that each component in the α crystal form nucleating agent is calculated as the following table by weight percentage:

[0088] Example

Example 10

Example 11

Example 12

Example 13

sodium benzoate

30％

33％

37％

40％

maleic anhydride

50％

40％

40％

30％

Hydrotalcite

20％

27％

23％

30％

[0089] The difference between embodiment 14-17 and embodiment 1 is: each component in the first auxiliary agent is calculated as following table by weight percentage:

[0090]

[0091] The difference between embodiment 14-17 and embodiment 1 is: in the β crystal nucleating agent, each component is calculated as following table by weight percentage:

[0092]

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Abstract

The invention relates to a preparation process of a sensor shell, and relates to the technical field of automobile braking systems. The preparation process of the sensor shell comprises the followingsteps: S1: preparing plastic particles, wherein the plastic particles comprise the following raw materials in parts by weight: 30-50 parts of polybutylene terephthalate, 25-45 parts of polyethylene terephthalate, 40-60 parts of polyamide, 15-25 parts of glass fibers, 5-10 parts of calcium carbonate whiskers, 5-10 parts of a nucleating agent, 0.1-0.5 part of sodium stearate, 0.1-0.5 part of phosphite ester and 0.1-0.2 parts of dilauryl thiodipropionate; S2, preparing a first auxiliary agent; S3, spraying the first auxiliary agent prepared in S2 on a mold; and S4, melting the plastic particles prepared in S1, and carrying out compression molding through a die in S3 to obtain the sensor shell. Under the actions of maleic anhydride modified polypropylene and the nucleating agent through the polyethylene terephthalate and polybutylene terephthalate, the crystallization rate is increased, the crystallization density is also increased, the stability during molding is improved, and the rigidity and the wear resistance of the product are improved.

Description

technical field [0001] The invention relates to the technical field of automobile brake systems, in particular to a preparation process of a sensor housing. Background technique [0002] The traditional automotive hydraulic braking system is mainly composed of brake pedal, vacuum booster, master cylinder, sub cylinder, brake drum and pipeline, etc., while the electronic hydraulic braking system (EHB) is developed on the basis of traditional hydraulic brakes. came. The control mechanism replaces the traditional hydraulic brake pedal with an electronic brake pedal, and cancels the bulky vacuum booster. [0003] The Chinese utility model patent with the authorized announcement number CN207089289U discloses an integrated electro-hydraulic braking system, including a housing; a master cylinder, the master cylinder is connected to the housing; a motor, and the output end of the motor is connected to the master cylinder through the master cylinder connector. The piston of the ped...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L67/02C08L23/14C08K13/06C08K9/04C08K7/14C08K7/08C08K3/26
Inventor 赵祺赵正荣
Owner 绍兴振荣汽车零部件有限公司