Browse Prior Art Database

Plastics Molding Hot/Cold System

IP.com Disclosure Number: IPCOM000078972D
Original Publication Date: 1973-Apr-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Crosby, EG: AUTHOR [+4]

Abstract

Molds for articles of plastic are commonly heated before the plastic enters the mold. The mold and the article are allowed to cool sufficiently to permit handling of the article, and the article is then removed from the mold for further cooling. The drawing shows an apparatus for a faster molding cycle of this general type.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Plastics Molding Hot/Cold System

Molds for articles of plastic are commonly heated before the plastic enters the mold. The mold and the article are allowed to cool sufficiently to permit handling of the article, and the article is then removed from the mold for further cooling. The drawing shows an apparatus for a faster molding cycle of this general type.

A plastic mold 2 has an inlet 3 and an outlet 4 for piping that carries oil. For heating the mold, oil is applied from a heater 6 through a port 7 of a valve 8 to inlet 3, and from outlet 4 through a port 9 of a valve 10 to the heater inlet. Port 11 in valve 8 permits recirculating oil through the heater.

For cooling the mold, cooled oil from a refrigerator 12 flows through a port 13 of a valve 14 to inlet 3, and from outlet 4 through a port 15 of valve 10 to the refrigerator unit inlet. A port 16 of valve 14 permits recirculating oil through refrigerator unit 12. Piping connections can be made at points 17 and 18 for carrying heated or refrigerated oil to other molds. The apparatus permits rapid cooling of the plastic and avoids alternate heating and cooling of the circulating oil.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]