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Extruded Form Plastics Molding Material Feed Unit

IP.com Disclosure Number: IPCOM000085891D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Geist, L: AUTHOR [+3]

Abstract

The feed unit includes a feed tube 10, a hydraulic cylinder 11, a transfer ram 12 which is connected to move in unison with the piston of cylinder 11 and is journaled within feed tube 10, and a base member 13 through which the feed tube 10 extends. Stationary shields 15 and 16 are carried by the front and rear of the assembly. A movable safety shield 17 has secured thereto guides 18 and 19 which are confined by and reciprocate with respect to the cylindrical shafts 20.

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Extruded Form Plastics Molding Material Feed Unit

The feed unit includes a feed tube 10, a hydraulic cylinder 11, a transfer ram 12 which is connected to move in unison with the piston of cylinder 11 and is journaled within feed tube 10, and a base member 13 through which the feed tube 10 extends. Stationary shields 15 and 16 are carried by the front and rear of the assembly. A movable safety shield 17 has secured thereto guides 18 and 19 which are confined by and reciprocate with respect to the cylindrical shafts 20.

A normally open interlock switch 21 is closed by engagement with safety shield guide 18 when the shield is in its lowermost position. Manual operator switch 23 is used to initiate a cycle and valve 24 regulates the fluid pressure delivered to hydraulic cylinder 11. The fluid pressure is indicated on gauge 24 and is adjustable through operation of the adjustment handle 26.

In operation, when the operator opens or moves the shield 17 to the upper position as shown in Fig. 1, the transfer ram 12 is automatically retracted. As seen in Fig. 2, when switch 21 opens the upper contacts of switch 24 are opened and the lower contacts are closed, switch 24 being configured such that a closed circuit is required to retain the upper contacts in a closed position. The accompanying closure of the lower contacts of switch 24 causes solenoid A to become active, thereby moving valve 32 to the right from the position shown in Fig. 3 causing the system fluid pressure t...