Abstract: A design apparatus for efficiently designing a mold that has improved quality. The mold is manufactured by removing cutting area from a mold material. The apparatus includes a database for storing geometry data, which represents a shape of the mold, and a further database for storing process data, which represents the shape of the cutting area, in association with the geometry data.

Abstract: An air passage switching system includes a switching door that is disposed rotatably in a case to open and close an air passage of the case. The switching door includes a door body, a rotation shaft provided in the door body, and a seal member made of an elastomer and adhering to an outer peripheral portion of the door body. The seal member contacts on a sealing surface of the case when the switching door closes the air passage. A plurality of recess portions are formed on the outer peripheral portion of the door body to be arranged in an outer peripheral direction. Thus, adhesion between the door body and the seal member can be strengthened.

Abstract: An air passage switching system includes a switching door that is disposed rotatably in a case to open and close an air passage of the case. The switching door includes a door body, a rotation shaft provided in the door body, and a seal member made of an elastomer and adhering to an outer peripheral portion of the door body. The seal member contacts on a sealing surface of the case when the switching door closes the air passage. A plurality of recess portions are formed on the outer peripheral portion of the door body to be arranged in an outer peripheral direction. Thus, adhesion between the door body and the seal member can be strengthened.

Abstract: A design apparatus for efficiently designing a mold that has improved quality. The mold is manufactured by removing cutting area from a mold material. The apparatus includes a database for storing geometry data, which represents a shape of the mold, and a further database for storing process data, which represents the shape of the cutting area, in association with the geometry data.

Abstract: According to the present invention, in a casing having a casing member made of resin and a porous elastic member affixed onto the casing member, there is formed a thick wall portion, which is thicker than the other portions, at a bending corner portion formed between wall surfaces of the casing member. In this way, when the resinous casing member is molded, the resin in a melted state flows along a surface at an opposite side of the elastic member (at a side of an affixing surface between the casing member and the insulator), in a space for forming the thick wall portion. Therefore, the resin in the melted state is prevented from flowing to press upward an end portion of the elastic member at the corner portion. Accordingly, the defective "reversing" is prevented so that the elastic member can be affixed on the wall surface of the casing member satisfactorily.

Abstract: Packing is fixed to and adheres to a molded damper on the outer periphery of the both sides of the damper body like a frame. To prevent defective molded products, a portion of the damper body having the packing disposed thereon is made thicker than a portion without the packing so that resin can flow into the portion where the packing is disposed before it goes into the portion without the packing.