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公开(公告)号：US4938904A
公开(公告)日：1990-07-03
申请号：US297675
申请日：1989-01-13
摘要： A process for making a substantially even thickness fascia part. The fascia part is prepared by placement of a plastic powdered material into an enclosed mold, heating and agitating the mold for distributing the plastic powder on the mold surfaces to provide a substantially even thickness fascia part on the molding surface. The mold includes first mold surfaces for defining critical portions of the mold which correspond to the desired portions of the mold for forming the finished shape of the part by melting of the plastic powder to a uniform film along the surface. The mold also includes second mold surfaces defining non-critical portions of the mold where it is undesirable for plastic filming to occur. The process for making a fascia part includes cutting a plurality of sections of insulating material to fit the non-critical portions of the mold, coating the non-critical portions of the mold with a heat resistant bonding material before assembling the cut sections onto the non-critical portions followed by curing of the bonding material and thereafter releasing a plastic powder into the mold. The mold is then heated to a temperature for melting the plastic powder material. The mold is rotationally agitated for distributing the plastic material onto critical molding surfaces. The plastic is prevented from covering the non-critical surfaces by heat insulation of these surfaces.
摘要翻译： 用于制造基本上均匀的厚度的面板部件的工艺。 通过将塑料粉末材料放置在封闭模具中，加热和搅拌模具以将塑料粉末分布在模具表面上以在模制表面上提供基本上均匀的厚度的面板部件来制备面筋部分。 模具包括用于限定模具的关键部分的第一模具表面，其对应于模具的期望部分，用于通过将塑料粉末沿表面熔化成均匀的膜来形成零件的最终形状。 模具还包括限定模具的非关键部分的第二模具表面，其中不希望发生塑料成膜。 用于制造面板部件的工艺包括切割绝缘材料的多个部分以配合模具的非关键部分，在将切割部件组装到非绝缘部分之前，用耐热粘合材料涂覆模具的非关键部分， 临界部分，然后固化接合材料，然后将塑料粉末释放到模具中。 然后将模具加热到用于熔化塑料粉末材料的温度。 模具被旋转地搅动以将塑料材料分配到临界模制表面上。 通过这些表面的隔热来防止塑料覆盖非关键表面。
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公开(公告)号：US4822438A
公开(公告)日：1989-04-18
申请号：US106181
申请日：1987-10-08
CPC分类号： B29C33/02 , B29C41/04 , B29C41/38 , Y10T156/1077
摘要： A process for insulating a rotational casting mold for use in a casting process for making a substantially even thickness fascia. The fascia is prepared by placement of a plastic powdered material into an enclosed mold, heating and agitating the mold for distributing the plastic powder on the mold surfaces to provide a substantially even thickness fascia part on the molding surface. The mold includes first mold surfaces for defining critical portions of the mold which correspond to the desired portions of the mold for forming the finished shape of the part by melting of the plastic powder to a uniform film along the surface. The mold also includes second mold surfaces defining non-critical portions of the mold where it is undesirable for plastic filming to occur. An insulating material covers the second mold surfaces, creating a temperature barrier on the second mold surfaces reducing the effective temperature of the second mold surfaces such that the plastic powder will melt on the first mold surfaces but not on the second surfaces. The process for insulating the rotational casting mold includes cutting a plurality of sections of insulating material to fit the non-critical portions of the mold, coating the non-critical portions of the mold with a heat resistant bonding material before assembling the cut sections onto the non-critical portions followed by curing of the bonding material.
摘要翻译： 一种绝缘用于铸造工艺中的旋转浇铸模具的方法，用于制造基本均匀的厚度的薄板。 通过将塑料粉末材料放置在封闭模具中，加热和搅拌模具以将塑料粉末分布在模具表面上以在模制表面上提供基本上均匀的厚度的面板部件来制备面板。 模具包括用于限定模具的关键部分的第一模具表面，其对应于模具的期望部分，用于通过将塑料粉末沿表面熔化成均匀的膜来形成零件的最终形状。 模具还包括限定模具的非关键部分的第二模具表面，其中不希望发生塑料成膜。 绝缘材料覆盖第二模具表面，在第二模具表面上产生温度屏障，降低第二模具表面的有效温度，使得塑料粉末将在第一模具表面而不是在第二表面上熔化。 用于绝缘旋转铸造模具的方法包括切割绝缘材料的多个部分以配合模具的非临界部分，在将切割部件组装到所述模具之前，用耐热粘合材料涂覆模具的非关键部分 非关键部分，然后固化接合材料。
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