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公开(公告)号：US4059379A
公开(公告)日：1977-11-22
申请号：US717874
申请日：1976-08-26
CPC分类号： B29C31/002 , B29C57/02 , Y10S425/218
摘要： Plastic pipe is belled under pressure by inserting what is, in effect, a telescoping mandrel into a heat-softened pipe end with great axial force immediately after two mold halves with cavities defining the desired bell configurations have been brought together under pressure. The softened pipe end is not only expanded to a bell configuration by the mandrel, but is compressed by the radial annular end wall of a sleeve which slides axially over the mandrel into the spacing between the mandrel and the mold halves defining the bell-shaped cavity. Thereby, not only may the heat-softened pipe end be molded to assume an exact configuration to a high degree of tolerance, but the normal thinning of the walls of the pipe end which occurs with its belling may be re-thickened by the axial compression of the sleeve to the original pipe wall thickness. After such radial expansion and axial compression of the heat-softened pipe end to the precise bell shape and tolerance, the mold halves are first cooled, the sleeve is first withdrawn axially, then the mandrel is withdrawn, and lastly the mold halves are separated to permit the belled pipe to be removed.Apparatus is provided to accomplish this process by bringing the mold halves together under great pressure followed by the axial movement into the pipe end of the mandrel and its axially compressing sleeve.
摘要翻译： 塑料管在压力下通过将具有实际意义的伸缩式心轴插入到具有大的轴向力的热软化管端中立即在限定所需钟形结构的腔体的两个半模已经在压力下汇合在一起之后立即被压住。 软化的管端不仅通过心轴膨胀成钟形结构，而且被套筒的径向环形端壁压缩，其轴向滑过心轴，进入心轴和限定钟形腔的半模之间的间隔 。 因此，不仅可以将热软化的管端模制成具有高度公差的精确构造，而且可以通过轴向压缩来重新加厚其端部发生的管端壁的正常变薄 的套管到原管壁厚度。 在将这种热软化的管端径向膨胀和轴向压缩到精确的钟形和公差之后，首先将半模冷却，首先将套筒轴向退回，然后取出心轴，最后将半模分开 允许将管道拆除。
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公开(公告)号：US3932094A
公开(公告)日：1976-01-13
申请号：US479756
申请日：1974-06-17
CPC分类号： B29C31/002 , B29C57/02 , Y10S425/218
摘要： A multiple station plastic pipe belling machine in which an endless conveyor periodically receives one of a series of plastic pipes as each pipe is dumped from a V-trough receiving such pipes in sequence after their extrusion and cutting into predetermined pipe lengths, disposes the pipes so received parallel to, but spaced from, each other and advances the thus-disposed pipes in predetermined increments; positions the pipes in such a manner that their ends to be belled are first passed in such increments through a heater adjacent the edge of the endless conveyor, while the pipes are continuously rotated until each pipe passes out of the heater and is then carried in such increments by the endless conveyor into the first of a plurality of belling stations where a pair of semi-circular clamps encircle the pipe end and a mandrel or plug is inserted therein. After insertion of the plug, the clamps are removed and the thus-plugged pipe is further moved incrementally through several additional belling machine stations in a cooling area until the pipe end is sufficiently cooled, whereupon the plug is withdrawn so that the pipe may be further advanced by the endless conveyor for discharge from the machine. As soon as one pipe is moved into the cooling area from this first clamping and plugging station, the next pipe is clamped and belled in that station. The plugs project from blocks which, after first being moved into the first station transversely to the path of the pipe end carried by the endless conveyor, thereby to enable the plug to be inserted in a pipe end, are then moved along the incremental path of the pipe end to the last belling station, whereupon the block is moved back transversely from and out of said path to a point behind the other blocks so that it may be shifted back behind the other blocks to a position for removement back into the first station. All movements of the machine are synchronized through appropriate clutching, gearing, sprocket and chain devices, and this synchronism is characterized by being of predictable and repeatable time span.
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公开(公告)号：US4323337A
公开(公告)日：1982-04-06
申请号：US957351
申请日：1978-11-03
CPC分类号： B29C31/002
摘要： A compression belling machine for precision belling simultaneously of a plurality of plastic pipe ends. This is accomplished by selectively feeding groups of pipes, the ends of which are to be belled, first into a heating unit and then, transferring them by an endless conveyor, simultaneously into a belling station having a plurality of molds one-half of each of which molds is stationary and the other half of which may be moved apart from its mating half to permit insertion between the separated halves of a heated end of one pipe. Each of the molds is entirely separate from the other molds and each mold may be removed from the apparatus for replacement. All mold halves, however, are moved together by a common hydraulic head. Control means are provided to operate a novel sequential type feeder and so that pipes may be selectively deposited into the heater and then aligned with their ends properly inserted into the particular mold cavities.
摘要翻译： 一种用于在多个塑料管端部同时进行精密振铃的压缩振铃机。 这是通过选择性地将一组管子（其端部要被罩起来）首先进入加热单元，然后通过环形输送机将它们同时输送到具有多个模具的振铃台中，每个模具中的每一个具有多个模具 这些模具是静止的，其另一半可以从其配合的一半移动，以允许在一个管的加热端的分离的两半之间插入。 每个模具与其他模具完全分离，并且每个模具可以从设备中取出以进行更换。 然而，所有的半模都由共同的液压头一起移动。 提供控制装置以操作新型的顺序式进料器，并且使得管可以选择性地沉积到加热器中，然后将它们的端部对准成正确地插入特定的模腔中。
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公开(公告)号：US4014640A
公开(公告)日：1977-03-29
申请号：US622814
申请日：1975-10-16
CPC分类号： B29C31/002 , B29B13/025 , B29C57/02 , B29C35/045 , B29L2023/22
摘要： A machine for removing a precut length of plastic pipe from an extrusion line, providing a bell on one end thereof, and providing a chamfer on the opposite end thereof. The pipe is received in a V-shaped trough along which it is longitudinally moved as it is delivered from the extruder. At predetermined intervals, a plurality of hydraulic pushers are actuated to move the pipe laterally from the trough onto a conveyor. The conveyor is indexed to a first position in which the axial location of the pipe is corrected and the end to be belled is heated. In a predetermined sequence of events, the conveyor is then indexed to a second position in which a belling plug is inserted into the heated end of the pipe; simultaneously, the opposite end of the pipe may be provided with an internal or external chamfer. When the conveyor is again indexed, the pipe is deposited onto a suitable system so that it may be conveyed to a shipping point.
摘要翻译： 一种用于从挤出生产线上去除塑料管的预切长度的机器，在其一端提供一个钟形，并在其另一端提供倒角。 管被容纳在V形槽中，当从挤出机输送时，管沿其沿纵向移动。 以预定间隔，多个液压推动器被致动以将管道从槽侧向移动到输送机上。 输送机被转位到第一位置，在第一位置，管道的轴向位置被校正，并且要被罩住的端部被加热。 在预定的事件顺序中，输送机然后被转位到第二位置，在第二位置中，一个鼓环塞被插入管的加热端; 同时，管的相对端可以设置有内部或外部倒角。 当输送机再次被分度时，管被沉积到合适的系统上，使得它可以被输送到运输点。
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