Mold for manufacturing a skin covered foamed plastic article

• US 4,997,356 A
• Filed: 11/21/1989
• Issued: 03/05/1991
• Est. Priority Date: 11/30/1988
• Status: Expired due to Fees

• Current Assignee: Ikeda Bussan Co., Ltd. (Johnson Controls International plc)
• Original Assignee: Ikeda Bussan Co., Ltd. (Johnson Controls International plc)
• Inventors: Katagiri, Hiroyuki
• Primary Examiner(s): Woo, Jay H.
• Assistant Examiner(s): Nguyen, Khanh P.
• Application Number:
  US07/439,548
• Time in Patent Office: 469 Days
• Field of Search: 425/4 R, 425/817 R, 425/117, 425/125, 425/577, 425/DIG. 10, 264/46.4, 264/46.5, 264/46.6, 264/46.7, 249/63, 249/142, 249/151, 249/177, 249/183, 249/184, 249/178, 249/175, 249/124, 249/122, 249/64, 249/186, 249/178, 249/66.1
• US Class Current: 425/117
• CPC Class Codes: B29C 33/0033 constructed for making articles provided with holes
• CPC Class Codes: B29C 33/20 Opening, closing or clamping
• CPC Class Codes: B29C 33/30 Mounting, exchanging or centering moulds, mould parts or cores; B29C33/485 takes precedence
• CPC Class Codes: B29C 33/485 cores or mandrels collapsible mandrels for shaping tube ends B29C57/02; collapsible mandrels for winding and joining B29C53/824
• CPC Class Codes: B29C 44/583 for making articles with cavities
• CPC Class Codes: Y10S 425/011 Dental injection

Abstract

A mold for manufacturing a skin covered foamed plastic article in which the middle mold is to be attached to the upper mold so as to eliminate the attaching and removing of the middle mold for every manufacturing cycle, without creating a danger of damaging the manufactured skin covered foamed plastic article in taking it out of the mold. The mold includes a middle mold to be attached to the upper mold such that when the upper mold is lifted upwards in order to be disassembled from the lower mold, the middle mold also moves upwards and the skin covered foamed plastic article is taken out from the lower mold by the upper mold and the middle mold; and a protrusion for making a hole in the skin covered foamed plastic article to be manufactured, to be attached to the molding surface of the lower mold, which is freely detachable from the lower mold such that when the upper mold is disassembled from the lower mold, the protrusion is taken off the lower mold along with the skin covered foamed plastic article.

Claims

1. A mold for manufacturing a skin covered foamed plastic article comprising a pad member covered by a skin cover, comprising:

a lower mold having a molding surface over which the skin cover is to be placed;

an upper mold to be assembled with the lower mold to form a cavity between the upper mold and the lower mold over the molding surface of the lower mold into which liquid foam resin to become the pad member is to be poured;

a middle mold to be placed between the upper mold and the lower mold and attached to the upper mold, the middle mold being movable upwards together with the upper mold when the upper mold is lifted upwards in order to be disassembled from the lower mold, wherein the skin covered foamed plastic article is taken out from the lower mold by lifting the upper mold and the middle mold upwards; and

a protrusion for making a hole in the skin covered foamed plastic article to be manufactured, to be attached to the molding surface of the lower mold, which is freely detachable from the lower mold when the upper mold is disassembled from the lower mold to remove the skin covered foamed plastic article.

2. The mold of claim 1, wherein the middle mold and the upper mold are relatively movable in a vertical direction for a predetermined length.

3. A mold for manufacturing a skin covered foamed plastic article including a pad member covered by a skin cover, comprising:

a lower mold having a molding surface for receiving the skin cover;

an upper mold for assembly with the lower mold to form a cavity between the upper mold and the lower mold and over the molding surface of the lower mold, for receiving a liquid foam resin for forming the pad member;

a middle mold for placement between the upper mold and the lower mold;

means attaching the middle mold to the upper mold for moving the middle mold upwardly, and for removing the skin covered foamed plastic article from the lower mold when the upper mold is lifted upwardly for disassembly from the lower mold; and

a protrusion for forming a hole in the skin covered foamed plastic article to be manufactured, releasably attached to the molding surface of the lower mold and freely detachable from the molding surface of the lower mold when the upper mold is disassembled from the lower mold, so that the protrusion is removed from the lower mold together with the skin covered foamed plastic article.

4. The mold of claim 3, wherein the middle mold and the upper mold are movable relative to one another for a predetermined distance.

5. The mold of claim 4, wherein the middle mold includes a plurality of rods extending therefrom and slidingly received by a corresponding plurality of holes formed in the upper mold.

6. The mold of claim 5, wherein the plurality of rods terminate at a plurality of stoppers for limiting movement of the upper mold relative to the middle mold.

7. The mold of claim 3, wherein the protrusion includes a shaping portion for forming the hole in the skin covered foamed plastic article, and a pin portion extending from the shaping portion for slidingly engaging a receiving hole formed in the molding surface.