A production process and production equipment for secondary shaping of pvc foam core board
A secondary shaping and production process technology, applied in the field of PVC foam board production, can solve the problems of shrinkage deformation and arch bending, reduce the shrinkage ratio of PVC foam core board and arch bending rate, etc., and achieve the elimination of tensile deformation , improve product quality, avoid the effect of structural instability
Active Publication Date: 2016-08-17
ZHEJIANG TIANZHEN BAMBOO & WOOD DEV
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Problems solved by technology
[0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the technical defects that the finished PVC foam core board produced by the existing one-time shaping production process is easy to cause shrinkage deformation and arch bending, and to provide a PVC foam core board The production process and production equipment of the secondary setting, the production process can significantly reduce the shrinkage ratio and arch bending rate of the PVC foam core board, and improve the quality of the PVC foam core board
Method used
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as figure 1 As shown, a schematic diagram of production equipment for secondary shaping of PVC foam core boards, including extruder 1, mold 2, cooling and shaping device 3, first tractor 4, secondary shaping device 8, arranged in a straight line and sequentially connected, The second tractor 7. Wherein the secondary setting device 8 is composed of a heating device 5 and a secondary cooling device 6 connected front and rear in a straight line; the traction speed of the first tractor 4 is slightly higher than that of the second tractor 7 .
[0027] corresponds to figure 1 The production equipment shown, a production process for secondary shaping of PVC foam core board is as follows figure 2 shown, including the following steps in order:
[0028] 1) Extrusion material: The PVC material added with foaming agent is continuously fed ...
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The invention relates to the field of production of PVC (Polyvinyl Chloride) foaming plates and particularly relates to production process and production equipment for secondary shaping of a PVC foaming core plate, aiming at the technical defects that the finished PVC foaming core plate product manufactured by using an existing one-time shaping production process easily has contraction deformation and arch bending. The production process comprises the following sequential steps: (1) extruding and discharging; (2) putting materials into a die to form a blank; (3) cooling and shaping; (4) drawing for the first time; (5) shaping for the second time; and (6) drawing for the second time. According to the production process and the production equipment, the PVC foaming core plate is machined by carrying out two-time temperature raising on the materials and the plate blank and carrying out two-time cooling and shaping on the plate bank, so as to effectively reduce shrinkage ratio and the arch bending rate of the PVC foaming core plate and improve the product quality of the PVC foaming core plate; the problems caused by existing one-time shaping process and equipment of the PVC foaming core plate are solved.
Description
technical field [0001] The invention relates to the production field of PVC foam boards, in particular to a production process and production equipment for secondary shaping of PVC foam core boards. Background technique [0002] Existing PVC foam boards are generally made by compounding the surface layer and PVC foam core board, wherein the PVC foam core board is manufactured by a one-time molding production process, and the length of the hot extruded PVC foam core board is usually more than 20 meters , and its technological process is extrusion extrusion, feeding into the mold to form a billet, cooling and shaping, and pulling out: the PVC material is continuously extruded by the extruder and sent to the mold for forming, and the continuous strip-shaped slab formed from the mold continues to advance through the process. The shaping table is cooled to make a finished board of PVC foam core board, and finally the finished board is pulled out from the cooling and shaping stati...
Claims
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IPC IPC(8): B29C47/90B29C47/00B29C48/90
CPCB29C48/07B29C48/901
Inventor 方庆华
Owner ZHEJIANG TIANZHEN BAMBOO & WOOD DEV