Pressing method of ultra-high molecular weight polyethylene grease storage pit
An ultra-high molecular weight, polyethylene grease storage technology, applied in the field of material molding, can solve the problems of tearing, easy deformation and shrinkage, easy to cause board surface and other problems
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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 and 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 15...
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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