A method and assembly for providing multi-stage extrusion of an article exhibiting an open interior. A multi-stage extrusion operation includes a first stage extrusion for receiving an initially extruded or otherwise pre-existing inner sleeve and extruding a surrounding sleeve and a plurality of radially projecting portions. A second stage subsequently extrudes an outer circular sleeve about the radially projecting portions. A third stage extrudes at least one wing portion to an outer edge of the outer circular sleeve.

A hose that includes an inner layer and an outer layer made of an elastic polymeric material, and a textile reinforcement layer interposed between the inner and the outer layers. The inner layer and the outer layer are reciprocally coupled to form a unitary tubular member, within which the textile reinforcement layer is embedded. The unitary tubular member has an elasticity such to automatically elongate under the working pressure given by the liquid flowing therethrough to increase its original length and to automatically recover once the working pressure stops. The textile reinforcement layer is adapted to move from a rest configuration when the working pressure stops to a working configuration when the unitary tubular member elongates under the working pressure, and vice versa.

A concrete dowel placement system and methods for making the same. The system allows for accurate and easy substantially-parallel or parallel placement of slip dowels within sections of concrete so that adjacent sections of concrete may be allowed to undergo thermal expansion and contraction while remaining in a common plane without cracking or faulting. The system includes a coupler and a sheath. The sheath is configured to be slidably extensible over the coupler and may be held to the coupler by friction. An outer surface of the sheath may be textured. Additionally, a method of constructing the concrete dowel placement system includes extruding material to form two tubes of different sizes. The tubes are then attached to each other, then material is extruded or injection molded to form a sheath. Alternatively, construction may include extruding material to form a tube, then removing some of the material from the tube in order to form a coupler.

A molding die device is provided for bringing a resin sheet into close contact with a pair of dies by vacuum suction from a cavity surface to perform molding. An outer frame portion is formed integrally with an outer peripheral portion of the respective dies arranged to face each other. Moreover, one of the dies has a recessed portion formed at the position of the one of the dies facing the outer frame portion of the other die and configured so that the outer frame portion of the one of the dies can be housed in the recessed portion. The outer frame portion is formed to protrude most in each die. Upon molding, the dies are clamped together after vacuum suction has been performed with the resin sheet being arranged in contact with the outer frame portions.

An assembly and process for forming a two stage extruded pipe having a central inner sleeve and a pair of outer attached lobes. The central sleeve shaped (also termed a grout receiving tube) is produced in an initial extrusion operation, following which it enters a cross head operation where a pair of outer lobes are attached to cross sectional exterior surface locations according to a second stage extrusion operation so as to be integrally formed therewith. Other steps include cooling of the dual stage extruded pipe, as well as sectioning and stacking the pipe. Additional steps include forming elongated slots or apertures into the central sleeve portion of the finished extrusion, such in non-interfering fashion with the individual passageway defining and lobes.

An assembly and process for forming a two stage extrusion of an elongated marine dock from a plasticized material, such as including but act limited to extruding a first generally L shaped bracket from a first more rigid thermoplastic, following which a cross head die arrangement is utilized in order to extrude a secondary arcuate and flexible material in extending fashion from a lower side of the L bracket. The secondary/flexible elastomer is extracted in an open flexed position relative to the first extruded bracket, and further such that, following completion, can be flexed into a closed engagement with an upper perpendicularly extending side of the bracket.

A wear-heat-resistant anti-bacterial anti-fouling steel wire framed pipe and a manufacturing method thereof are provided. The steel wire framed pipe includes: an anti-bacterial anti-fouling inner layer, an enhancement layer and a wear-heat-resistant outer layer from inside to outside in turn, wherein: the anti-bacterial anti-fouling inner layer is made from antifouling and antibacterial composite modified polyethylene; the wear-heat-resistant outer layer is made from wear-resistant cross-linked modified PE-RT; the enhancement layer includes an interlayer and two steel wire gauze layers respectively coating on an inner surface and an outer surface of the interlayer, and the interlayer is respectively bonded with the anti-bacterial anti-fouling inner layer and the wear-heat-resistant outer layer via hot-melt adhesive. The steel wire framed pipe provided by the present invention has high structural strength, wear-resistance, heat-resistance, and anti-bacterial and anti-fouling properties.

Method for making multiple durometer bulb seals and any other types of multiple durometer seals and moldings includes cooling separately at least one structural member and at least one sealing portion, which have different durometers and shapes. At least a first extrusion is drawn through an extruder, forming a structural member profile and the extruded material is pulled along a longitudinal axis to a first calibrator device and first cooling tank to cool the structural member profile to a predetermined temperature. Cooling medium directly contacts the outer and inner surfaces of the first profile. Downstream, the sealing portion is extruded and affixed onto the cooled structural member and pulled further downstream to a second calibrator device and through a second cooling tank to cool the final profile a predetermined amount. Disparity in cooling expansion and cooling differential between the multiple durometers and shapes is avoided or overcome.

A rapid shaping and aseptically filling device has an extrusion mold head, two mold mechanisms, and at least one filling needle. The extrusion mold head has an annular outlet, a needle passing through hole, and a shaping area defined below the annular outlet. The annular outlet forms a plastic blank. The two mold mechanisms are respectively located in two sides of the shaping area. Each of the two mold mechanisms is annular and has multiple molds. The molds are capable of moving circularly and sequentially passing the shaping area to engage with each other and tightly clamp the plastic blank. The at least one filling needle is mounted in the needle passing through hole and is located in a center of the plastic blank. A bottom end of the at least one filling needle is located above top two of the molds which engage with each other.

An assembly and process for forming a two stage extruded pipe having a central inner sleeve and a pair of outer attached lobes. The central sleeve shaped (also termed a grout receiving tube) is produced in an initial extrusion operation, following which it enters a cross head operation where a pair of outer lobes are attached to cross sectional exterior surface locations according to a second stage extrusion operation so as to be integrally formed therewith. Other steps include cooling of the dual stage extruded pipe, as well as sectioning and stacking the pipe. Additional steps include forming elongated slots or apertures into the central sleeve portion of the finished extrusion, such in non-interfering fashion with the individual passageway defining and lobes.