초록 ▼

A mold interlocking device that includes a first portion attached to a mold half that has a head with a channel and an insert therein that is received in a pocket of a receptacle of a second portion that is attached to another mold half. In one embodiment, the head comprises sidewalls each with chan

A mold interlocking device that includes a first portion attached to a mold half that has a head with a channel and an insert therein that is received in a pocket of a receptacle of a second portion that is attached to another mold half. In one embodiment, the head comprises sidewalls each with channels that receive a replaceable insert therein. Preferred inserts include rollers, plates, plates with lubricating plugs, and plates comprised of layers. In one embodiment, each sidewall of the head has a tapered section disposed between a mounting base and a straight section and each pocket is defined by a complementarily contoured sidewall. In another embodiment, each head sidewall further includes a second tapered section adjacent the free end of the head.

대표청구항 ▼

A mold interlocking device that includes a first portion attached to a mold half that has a head with a channel and an insert therein that is received in a pocket of a receptacle of a second portion that is attached to another mold half. In one embodiment, the head comprises sidewalls each with chan

A mold interlocking device that includes a first portion attached to a mold half that has a head with a channel and an insert therein that is received in a pocket of a receptacle of a second portion that is attached to another mold half. In one embodiment, the head comprises sidewalls each with channels that receive a replaceable insert therein. Preferred inserts include rollers, plates, plates with lubricating plugs, and plates comprised of layers. In one embodiment, each sidewall of the head has a tapered section disposed between a mounting base and a straight section and each pocket is defined by a complementarily contoured sidewall. In another embodiment, each head sidewall further includes a second tapered section adjacent the free end of the head. intermediate pressure in a first compression stage, said first compression stage including a first piston with a first seal, said first piston reciprocating a first length; and (b) compressing gas from an intermediate pressure to a high pressure in a second compression stage, said second compression stage including a second piston with a second seal, said second piston reciprocating a second length, wherein said first length and second length are adjusted relative to each other to maintain substantially equal compression ratios for the first and second stage while ensuring an expected wear life for said first and second seal are substantially the same. 4. The method as claimed in claim 3, wherein said first length and second length provide the desired output pressure. 5. A method of reducing wear on a seal of a second stage piston of a two stage oil free compressor assembly, comprising: (a) providing an oil free compressor having a first compression stage adapted for compressing gas from a low pressure to an intermediate pressure and including a first wobble piston connected to reciprocate in a first cylinder and a first flexible seal between said first wobble piston and said first cylinder, a second compression stage adapted for compressing gas from the intermediate pressure to a higher pressure and including a second wobble piston connected to reciprocate in a second cylinder and a second flexible seal between said second wobble piston and said second cylinder, and a motor connected to reciprocate said first wobble piston in said first cylinder over a predetermined stroke and said second wobble piston in said second cylinder over a predetermined stroke; and (b) establishing a shorter predetermined stroke over which said second piston is reciprocated by said motor than said first piston is reciprocated by said motor so as to substantially equalize wear between said first and second flexible seal.