High-wear-resistance PVDF composite board and preparation method thereof

A composite plate and composite plate technology, applied in chemical instruments and methods, metal rolling, synthetic resin layered products, etc., can solve problems such as noise, wear of PTFE plastic layer, obvious vibration, etc.

Pending Publication Date: 2022-07-29
ZHEJIANG CHANGSHENG SLIDING BEARINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the PTFE bearing pad has self-lubricating properties and the friction coefficient is reduced, the traditional PTFE plastic layer is relatively thin, generally no more than 0.03mm, and due to the hi

Method used

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  • High-wear-resistance PVDF composite board and preparation method thereof
  • High-wear-resistance PVDF composite board and preparation method thereof
  • High-wear-resistance PVDF composite board and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0070] The present invention also provides a system for preparing a composite sheet, which can be used to prepare the PVDF composite sheet of the present invention, or other composite sheets having a metal substrate, an elastic layer (metal mesh layer) and a sliding layer (resin layer). The preparation system of the composite plate of the present invention can be used for extruding the resin composition onto the metal mesh surface of the heated metal mesh metal substrate composite plate, and then rolling to obtain the composite plate. The preparation system of the composite plate of the present invention includes a pulling device, a heating device, an extruder and a rolling mill, wherein the pulling device is used for pulling the metal mesh metal substrate composite plate to pass through the heating device and the rolling mill successively, and the heating device is used for the metal mesh metal substrate. The composite plate is heated, and the extruder is used to extrude the r...

Embodiment 1

[0084] The formula of the resin composition in this example is: 79wt% PVDF, 3wt% carbon fiber, 15wt% PTFE fine powder, 3wt% graphite powder.

[0085] The present embodiment adopts the following technology to prepare PVDF composite board:

[0086] (1) Lay the copper mesh on the passivated steel plate, the copper mesh is woven copper mesh, the wire diameter of the copper mesh is 0.25mm, and the mesh number of the copper mesh is 40 meshes, put it into a sintering furnace and sintered into a whole to obtain copper mesh. Mesh steel plate composite plate, wherein the sintering temperature is 900 ° C, the sintering time is 15 minutes, and the sintering process is protected by a hydrogen-nitrogen mixed atmosphere with a volume ratio of 3:1;

[0087] (2) mixing the components of the resin composition to obtain a mixture; putting the mixture into an extruder and directly extruding it onto the surface of the copper mesh of the steel strip copper mesh composite board that has been inducti...

Embodiment 2

[0089] The formula of the resin composition of this embodiment is: 80wt% PVDF, 5wt% carbon fiber, 10wt% PTFE fine powder, 5wt% graphite powder.

[0090] The present embodiment adopts the following technology to prepare PVDF composite board:

[0091] (1) Lay the copper mesh on the passivated steel plate, the copper mesh is woven copper mesh, the wire diameter of the copper mesh is 0.25mm, and the mesh number of the copper mesh is 40 meshes, put it into a sintering furnace and sintered into a whole to obtain copper mesh. Mesh steel plate composite plate, wherein the sintering temperature is 900 ° C, the sintering time is 15 minutes, and the sintering process is protected by a hydrogen-nitrogen mixed atmosphere with a volume ratio of 3:1;

[0092] (2) mixing the components of the resin composition to obtain a mixture; putting the mixture into an extruder and directly extruding it onto the surface of the copper mesh of the steel strip copper mesh composite board that has been indu...

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PUM

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Abstract

The preparation method comprises the following steps: directly sintering a metal net on a metal plate, directly extruding a modified PVDF material prepared from PVDF, reinforced fibers and a solid lubricant onto the metal net through an extruder, and rolling to prepare the PVDF composite board. The modified PVDF material has good wear resistance, has a microporous structure on the surface after being combined with a metal net, and is suitable for grease lubrication. The PVDF composite board disclosed by the invention is suitable for reciprocating, rotating and swinging motions under grease lubrication, high load and low speed, for example, the PVDF composite board is applied to automobile steering gear bearing bushes, seat angle adjuster bushing systems and the like.

Description

technical field [0001] The invention belongs to the technical field of sliding bearing materials, and in particular relates to a high wear-resistant PVDF composite plate and a preparation method thereof. Background technique [0002] The bearing shell is the contact part between the sliding bearing and the journal. It is a semi-cylindrical surface in the shape of a shoe, which is very smooth. It is generally made of wear-resistant materials such as bronze, anti-friction alloys, special engineering plastics, and special ceramics. Exemplary bearing pads such as figure 1 shown. When the sliding bearing is working, there is a thin film of lubricating oil between the bearing bush and the rotating shaft. If the lubrication is poor, there will be direct friction between the bearing bush and the rotating shaft, and the friction will generate a high temperature. Although bearing pads are usually made of high temperature resistant materials, the heat generated by direct friction is...

Claims

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Application Information

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IPC IPC(8): B29C48/07B29C48/154B21B1/38B32B15/02B32B15/082B32B15/14B32B15/18B32B15/20B32B27/30B62D3/12C08L27/16
CPCB29C48/07B29C48/154B29C48/022B21B1/38C08L27/16B32B15/02B32B15/20B32B15/14B32B15/18B32B15/082B32B27/304B62D3/12B21B2001/383B21B2001/386C08L2205/02B32B2262/106B32B2264/0257B32B2264/108B32B2307/51B32B2307/50B32B2307/554C08L27/18C08K7/06C08K3/04
Inventor 樊学峰孙志华
Owner ZHEJIANG CHANGSHENG SLIDING BEARINGS
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