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A new type of piston and method of making the same
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A production method and piston technology, which is applied to pistons, machines/engines, mechanical equipment, etc., can solve problems such as short service life, cumbersome processing, and complex structure, and achieve high mechanical strength, high transmission efficiency, and low friction coefficient.
Active Publication Date: 2020-09-15
南通汇平高分子新材料有限公司
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Problems solved by technology
[0004] In order to solve the defects of complex structure, cumbersome processing, poor performance and short service life in the prior art, the present invention provides a new type of piston and its processing method
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Embodiment 1
[0034] A kind of processing method of aforementioned novel piston of present embodiment, comprises the following steps:
[0035] S1. The metal rod is processed into a cylindrical structure through the turning process to form a piston head; then the surface of the piston head is sprayed to promote the adhesion of the coating, and the inner axial end surface and the outer axial end surface of the piston head are respectively Spraying thermoplastic polyimide layer 22 and ceramic coating 21 to make insert;
[0036] Among them, the ceramic coating is sprayed at room temperature, using powder electrostatic spraying, and then high temperature curing at 400 ° C;
[0037] S2. Heat the insert to 200-250°C and put it into the injection mold preheated to 200-250°C. At the same time, control the temperature of the barrel of thermoplastic polyimide to 400-500°C and inject thermoplastic Polyimide, made into blanks;
[0038] Wherein, thermoplastic polyimide consists of the following compone...
Embodiment 2
[0045] A kind of processing method of aforementioned novel piston of present embodiment, comprises the following steps:
[0046] S1. The metal rod is processed into a cylindrical structure through the turning process to form a piston head; then the surface of the piston head is sprayed to promote the adhesion of the coating, and the inner axial end surface and the outer axial end surface of the piston head are respectively Spraying thermoplastic polyimide layer 22 and ceramic coating 21 containing carbon fiber and solid lubricant to make insert;
[0047] Among them, the ceramic coating is sprayed at room temperature, using powder electrostatic spraying, and then high temperature curing at 400 ° C;
[0048] S2. Heat the insert to 200-250°C and put it into the injection mold preheated to 200-250°C. At the same time, control the temperature of the barrel of thermoplastic polyimide to 400-500°C, and inject into the injection mold containing Thermoplastic polyimide with carbon fib...
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Abstract
The invention provides a novel piston and a manufacturing method of the novel piston. The novel piston comprises a piston body and a piston head. The piston head is embedded to the end of the piston body. The axial end face on the inner side and the axial end face on the outer side of the piston head are provided with a thermoplastic polyimide layer and a ceramic coating correspondingly. Comparedwith the prior art, the novel piston has the following beneficial effects that the structure is simple, no piston ring is arranged, the structure is more simple, and performance is more reliable; thepiston is lighter, and therefore the transmission efficiency of an engine is higher; the novel piston is better in wear resistance, lower in friction coefficient and longer in service life compared with a piston ring structure; and unique modified thermoplastic polyimide is adopted; and at 250 DEG C or below, the size is stable, and linear expansion coefficient is kept the same as an aluminum alloy.
Description
technical field [0001] The invention relates to a novel piston and a manufacturing method thereof, belonging to the field of automobile and other engine pistons. Background technique [0002] With the rapid development of science and technology, various new materials are also used more and more in engine design. With the improvement of user requirements and the improvement of emission standards of automobile manufacturers; The direction of beat emissions continues to evolve. As the heart of the engine, the piston is one of the most important parts of the engine; how to reduce the quality of the piston, improve the wear resistance of the piston, reduce the friction coefficient between the piston and the piston cylinder, and improve the service life of the piston is of great significance. [0003] At present, most of the traditional pistons use Al-Si piston body + piston rings to produce piston components (such as figure 1 shown); its structure is complex, the processing is ...
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