摘要:
Die tooling (4) is formed by forming a series of passages (50,52,60,62) extending in the length of the tooling where each passage has a circumference defined within a body member (70) of the tooling (4). Preferably the passages are primarily formed using a drilling procedure. The passages define a predetermined pattern of outlets (54,56) adjacent the extrusion outlet or outlets (22,32). The passages between the inlets and outlets can be formed in a series of connected body members with each passage extending through each body member (70). Die tooling of this design is more robust and cost effective to manufacture.
摘要:
Disclosed is a corrugated double wall plastic pipe (2) with a bell connector (8) at one end of the pipe section and an insert connector (10) at the opposite end of the pipe. The insert connector includes an inner wall (30) that cooperates with the bell connector at the junction of the bell connector and the pipe to continue to the inner wall between pipes joined by an insert connector of one pipe inserted in the bell connector of a second pipe.
摘要:
A pipe cutting apparatus includes a machine base having a first machine table slidably secured for moving with a pipe during the extrusion thereof. The apparatus includes a rotary base table with a cutting arrangement attached at a periphery thereof such that the cutting arrangement orbits about the pipe during cutting thereof. The cutting arrangement includes a cutting tool supported on a pivoting support arm. The support arm includes an independent powered gear drive train for pivoting the support arm to accommodate different sizes of pipe and to allow cutting. Preferably the cutting apparatus has a second slidable table to allow precision cutting of multiple cuts of the pipe while the pipe is clamped or held.
摘要:
A molding apparatus includes a moving mold for shaping molten plastic into product made within the moving mold. The moving mold is surrounded by an air block housing to define a cooling chamber exteriorly around the moving mold. At least one heat exchanger is located within the cooling chamber. The heat exchanger provides cooling air which is contained by the housing within the cooling chamber to act on and provide cooling of the moving mold.
摘要:
Equipment (1) used in the molding of plastic pipe includes die tooling (3) provided with a plastic flow distributor (25) at the upper end of the die tooling. The plastic flow distributor has adjustable flow to provide an even distribution of plastic from an extruder into at least one die passage (9) within the die tooling.
摘要:
A pipe molding apparatus includes a plurality of mold blocks (9) which move along a molding path to form double wall plastic pipe having an outer pipe wall with corrugations which set outside diameter of the pipe and an inner wall around a bore through the pipe. The mold blocks (9) have profiled faces which determine shape of the pipe. The profiled faces are reconfigureable in profile between first and second face profiles to vary both depth of the corrugations and diameter of the bore through the pipe without varying external diameter and while maintaining essentially constant wall thickness of the pipe.
摘要:
A device for cutting slits in plastic tubes produces a plurality of cuts spaced around tubing passed through the device. The device comprises a plurality of rotatable members (3) located at different circumferential positions around a tube passage (2) through the device. Each rotatable member is provided with a tube cutter (25) which is directed at and away from the tube passage (2) with rotation of each member (3). These rotatable members (3) are adjustable radially of the tube passage (2) for accommodating diametric variances in the tubing.