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Preparation method of ultra-high molecular weight polyethylene fat storage press pit

An ultra-high molecular weight, polyethylene grease storage technology, applied in the field of material molding, can solve the problems of destroying the surface molecular chain structure, tearing, affecting the ability to store silicone grease, etc.

Inactive Publication Date: 2010-09-22
陈立阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past, fat storage pits were made by machining methods, such as drilling pits, etc., but this would damage the surface of the skateboard and destroy its surface molecular chain structure, so that when the skateboard was used as a friction pair, it would be torn from the drill pit, and then affect its service life
There are also some manufacturers who use cold pressing to complete the production of grease storage pits. However, under high pressure, the grease storage pits made by this method are easily deformed and shrink, which in turn affects their ability to store silicone grease.
There are also some manufacturers who use balls embedded in the porous plate as the mold for the fat storage pit. The fat storage pit made by this method has irregular shape and uneven size, which is also very easy to cause the surface of the plate and affect the use.

Method used

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  • Preparation method of ultra-high molecular weight polyethylene fat storage press pit
  • Preparation method of ultra-high molecular weight polyethylene fat storage press pit
  • Preparation method of ultra-high molecular weight polyethylene fat storage press pit

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A preparation method of ultra-high molecular weight polyethylene fat storage pit pressure, the steps are:

[0028] 1. Preheating: Put a modified ultra-high molecular weight polyethylene sheet with a side length of 500mm in a sintering furnace (model ZKJSL-100 / 300) for 20 minutes, and control the furnace temperature at 80 or 85 or 88 or 91 Or 95 or 99 or 102 or 107 or 111 or 115 or 120°C.

[0029] 2. Pressurization: Fix the overall processed mold with a side length greater than 500mm on the press (see the layout of the fat storage pit figure 2 with image 3 ), mold constant temperature 50 or 52 or 54 or 56 or 58 or 60 ℃. Take the preheated modified ultra-high molecular weight polyethylene sheet out of the sintering furnace, put the modified ultra-high molecular weight polyethylene sheet on the press within 3 or 4 or 5 seconds to form it, and the pressure is 12 or 14 Or 16 or 20MPa.

[0030] 3. Pressure holding: After the pressure is loaded to the preset 12 or 13 or 1...

Embodiment 2

[0034] Put a modified ultra-high molecular weight polyethylene slide plate with a side length of 500 mm in a sintering furnace, adjust the furnace temperature to 80 or 84 or 89 or 94 or 98 or 102 or 106 or 120 °C, and preheat for 25 minutes. The overall processed mold with a side length greater than 500mm is fixed on the press, and the mold is kept at a constant temperature of 50 or 51 or 53 or 55 or 57 or 59 or 60°C. Take the preheated board out of the sintering furnace, put it on the press quickly and press it to form, the pressure is 18MPa, keep the pressure for 5 minutes, so that the fat storage pit is finalized. After the pressure-holding and setting, temper on a flat vulcanizing machine at 50 or 52 or 54 or 56 or 58 or 60°C, with a pressure of 4 or 5 or 6 MPa, and hold the pressure for 5 or 7 or 9 or 10 minutes; then take out the plate with the side length The 600mm, 50mm thick steel plate is pressed and shaped until the skateboard is completely cooled.

Embodiment 3

[0036] Put a modified ultra-high molecular weight polyethylene slide plate with a side length of 500 mm in a sintering furnace, adjust the furnace temperature to 80 or 83 or 86 or 89 or 94 or 98 or 103 or 107 or 120 °C, and preheat for 28 minutes. The overall processed mold with a side length greater than 500mm is fixed on the press, and the mold is kept at a constant temperature of 50 or 52 or 55 or 57 or 60°C. Take the preheated board out of the sintering furnace, put it on the press quickly and press it to form, the pressure is 16MPa, keep the pressure for 5 minutes, so that the fat storage pit is finalized. After the pressure-holding and setting, temper on a flat vulcanizing machine at 50 or 51 or 53 or 55 or 57 or 59 or 60°C, with a pressure of 4 or 5 or 6 MPa, and hold the pressure for 5 or 6 or 7 or 8 or 9 or 10 minutes; then Take out the plate and press it with a steel plate with a side length of 600mm and a thickness of 50mm until the slide plate is completely cooled....

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Abstract

The invention discloses a preparation method of an ultra-high molecular weight polyethylene fat storage press pit, which comprises the steps of: A preheating: putting a modified ultra-high molecular weight polyethylene board into a sintering furnace for preheating, and controlling the furnace temperature to be 80-120 DEG C; B. pressurizing: firmly fixing a fat storage pit mould which is processed in an integral way onto a pressing machine, taking the preheated modified ultra-high molecular weight polyethylene board out from the sintering furnace, and putting the modified ultra-high molecular weight polyethylene board onto the pressing machine for pressurizing and molding; C. pressure maintaining: loading the pressure to preset pressure of 12-20MPa, and forming the fat storage pit; D. cooling: after pressure maintaining, cooling the board; and E. shaping, taking out the cooled modified ultra-high molecular weight polyethylene board, and pressing by weight for shaping. The preparation method has the advantages that the obtained fat storage pit has a regular shape and the size which can easily meet the design requirement; the fat storage pit is not easily deformed and disappeared when in use; and after the fat storage pit is pressed, the polyethylene board does not easily have the phenomenon of buckling deformation, so that the fat storage pit is convenient for direct use.

Description

technical field [0001] The invention relates to the technical field of material forming, and more specifically relates to a method for preparing a modified ultra-high molecular weight polyethylene fat storage pit pressure, which is suitable for series products of bridge supports. Background technique [0002] The modified ultra-high molecular weight polyethylene slide plate can be used in bridge support products as one of the sliding friction pair materials. During the service period of the bridge bearing, the sliding friction pair is required to always work with a low friction coefficient, so the bearing product needs to be coated with silicone grease on the working interface of the friction pair before leaving the factory. In order to ensure that the silicone grease always stays on the working interface and is not completely squeezed out during the working process, it is necessary to make a grease storage pit on the surface of the modified ultra-high molecular weight polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C51/08B29C51/42
Inventor 陈立阳
Owner 陈立阳