Method and device for molding skin-covered foamed plastic article

• US 5,061,419 A
• Filed: 05/14/1987
• Issued: 10/29/1991
• Est. Priority Date: 05/23/1986
• 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: Saito, Takayuki, Kouda, Hiroshi
• Primary Examiner(s): Dawson, Robert A.
• Assistant Examiner(s): Kuhns, Allan R.
• Application Number:
  US07/049,556
• Time in Patent Office: 1,629 Days
• Field of Search: 264/45.1, 264/46.6, 264/46.7, 264/46.4, 249/184
• US Class Current: 264/46.6
• CPC Class Codes: B29C 33/0033 constructed for making articles provided with holes
• CPC Class Codes: B29C 33/48 with means for collapsing or disassembling
• CPC Class Codes: B29C 44/583 for making articles with cavities
• CPC Class Codes: B29L 2031/3023 Head-rests

Abstract

Disclosed herein is a method and device for molding a skin-covered foamed plastic article with a bore formed therein. A split mold is used which comprises a lower mold part with a recess and an upper mold part with a through bore. The upper mold part is placeable on the lower mold part to form a combined cavity by the through bore and the recess. In order to provide the foamed product with a desirable bore, first and second shaping dies are employed which are combinable with each other to form a combined shaping body which is, upon molding, projected into the combined cavity of the split mold. Upon hardening of the product, the second and first shaping dies are dismantled from the split mold in this order.

Claims

1. A method for molding a skin-covered foamed plastic article with a bore formed therein, comprising by steps;

(a) preparing a split mold, said split mold including a lower mold part having a recess and an upper mold part having a through bore;

(b) mounting said upper mold part on the lower mold part in such a manner as to form a combined cavity by said through bore and said recess;

(c) putting a skin member into said combined cavity in such a manner that the outer surface of the skin member intimately contacts with the wall of the combined cavity;

(d) placing a first shaping die on said upper mold part in such a manner that a fist projection thereof is projected into the combined cavity lined with the skin member;

(e) pouring a liquid material for the foamed plastic article into the combined cavity;

(f) placing a second shaping die on the upper mold part in such a manner that a second projection thereof is projected into the combined cavity at a position just beside the first projection;

(g) removing the second and first shaping dies, in this order, form the split mold upon hardening of the material; and

(h) dismantling the upper mold part from the lower mold part thereby to easily remove the foamed product from the mold;

wherein step (d) is carried out before step (e) and step (e) is carried out before step (f).

2. A method as claimed in claim 1, in which before the step (d), a given portion of the skin member is fastened to said upper mold part, and in which before the step (h), the given portion of the skin member is unfastened from the upper mold part.

3. A method as claimed in claim 1, in which said second shaping die is guided by said first shaping die in step (f).

4. A method as claimed in claim 1, in which said step (f) is carried out just after the step (e).

5. A method as claimed in claim 1, in which before the step (d), said first shaping die is coated with a releasing agent and in which before the step (f), said second shaping die is coated with a releasing agent.

6. A method as claimed in claim 1, consisting essentially of the recited steps.

7. A method as claimed in claim 4, consisting essentially of the recited steps.