MOLD FOR MOLDING URETHANE FOAM AND METHOD FOR PRODUCING URETHANE FOAM PRODUCT USING THE SAME

• US 20190322011A1
• Filed: 06/28/2018
• Published: 10/24/2019
• Est. Priority Date: 04/18/2018
• Status: Active Application

• Current Assignee: Howa Kasei Co., Ltd.
• Original Assignee: Howa Kasei Co., Ltd.
• Inventors: Oike, Hidekazu
• Application Number:
  US16/021,190
• Publication Number:
  US 20190322011A1
• Time in Patent Office: Days
• CPC Class Codes: B29C 44/58 Moulds
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2823/12 PP, i.e. polypropylene

Abstract

To provide a mold for molding urethane foam capable of producing a urethane foam product without using a mold release agent, and a method for producing a urethane foam product using the same. The mold for molding urethane foam according to the present invention includes polypropylene mold materials 12, 13 that constitute upper and lower molding surfaces 16, 19 and are attached respectively to opposite surfaces of an upper mold frame 10 and a lower mold frame 11 that are openable and closable. The mold has excellent releasability and can be used to produce urethane foam products without using a mold release agent.

Claims

1. A mold for molding urethane foam comprising:

a lower mold frame;

an upper mold frame that is openable and closable against the lower mold frame;

a mold material made of polypropylene that is attached to an upper surface of the lower mold frame and that constitutes a molding surface; and

a mold material made of polypropylene that is attached to an undersurface of the upper mold frame and that constitutes a molding surface.

2. The mold for molding urethane foam according to claim 1, wherein gaps for absorbing thermal expansion of the polypropylene mold materials are provided between the polypropylene mold materials and the mold frames.

3. A method for producing a urethane foam product, the method comprising molding a urethane foam product, without using a mold release agent, by using a mold for molding urethane foam including polypropylene mold materials that constitute upper and lower molding surfaces and are attached respectively to opposite surfaces of an upper mold frame and a lower mold frame that are openable and closable.