摘要:
A method and apparatus for lining the interior of a container with plastic sheet material. An open topped container is elevated upon a support through a passage in a lower die member into contact with the under surface of a sheet of heated thermoplastic material overlying the upper end of the passage. A plug assist member is then employed to deform the sheet into conformation with the interior of the container. Upon withdrawal of the plug assist member, an upper die member is lowered into shearing relationship with the lower die member to shear the sheet around the upper periphery of the container. The support, with the lined container in place, is then further elevated to raise the lined container upwardly through the opening thus sheared in the sheet and through a passage extending vertically through the upper die member. The plastic lined container is discharged from the apparatus by pushing it transversely across the flat upper surface of the upper die member.
摘要:
Polytetrafluoroethylene (PTFE) pipes, which may have a supporting metal mandrel placed therein, are flanged. To this end, use is made of a first implement which is a rigid annular plate having a frustoconical element and a bevelled cylindrical plug slightly smaller in diameter than the PTFE-pipe centrally mounted thereon. The first implement is heated once to 180.degree.-210.degree. C and forced into contact with the PTFE-pipe so that the plug opens thereinto. The PTFE-pipe and the first implement projecting thereinto are caused to rotate for 0.5-3 minutes at a speed of 5-10 rpm and under a contact pressure of 5-20 kg/cm.sup.2 of pipe surface area to be flanged whereby the free end of the PTFE-pipe is flared. The first implement is removed and replaced by a second implement which is a rigid annular plate having a bevelled cylindrical plug substantially equal in diameter with the PTFE-pipe centrally mounted thereon. The second implement is heated once to 180.degree.-210.degree. C and forced into contact with the PTFE-pipe. The PTFE-pipe and the second implement projecting thereinto are caused to rotate for 1-3 minutes at a speed of 5-15 rpm under a contact pressure of 5-20 kg/cm.sup.2 of pipe surface area to be flanged, and the flanged end of the PTFE-pipe is chilled by means of a coolant.
摘要:
A method for producing in moulds plastic containers having at least one part of the lateral walls in the form of a reinforcing sheet. This method is particular in that in association with each female mould a sheet of thermoplastic material is advanced in a pre-determined path adjacent the open end of the female mould held in a shaping position. A loop is prepared from a sheet of reinforcing material at a location spaced from the path of the thermoplastic material. The mould is moved from the shaping position into alignment with the reinforcing loop, the reinforcing loop is introduced into the mould. The mould is moved into the shaping position with the reinforcing loop retained therein. The sheet of thermoplastic material within the reinforcing loop is expanded to conform with the interior surface thereof.
摘要:
Disclosed is a container for storing product and a process and apparatus for making the container. The container comprises a paperboard outer container and a plastic inner container which has been drawn and blow formed into the outer container. The container is characterized by plastic screw threads which extend from the plastic inner container around the upper portion of the outside of the paperboard outer container. The screw threads permit a cap to be screwed onto the container after product, e.g. food, is placed in the container. The screw threads are vacuum formed, preferably simultaneously with the blow forming of the plastic inner container.
摘要:
A pedestal liner for a pedestal truck of a railway vehicle and method of making same are provided wherein such pedestal liner is of roughly U-shaped configuration having a bight and a pair of parallel legs and comprising a continuous uninterrupted backing material defining the bight and parallel legs, a first antifriction material for the bight fixed against the backing material and adapted to engage a vertically disposed planar guide surface of an associated journal box, a second antifriction material for the parallel legs fixed against the backing material and adapted to engage vertically disposed parallel side surfaces of the journal box which are disposed on opposite sides of the guide surface with the backing material providing optimum structural support for the antifriction materials and the first and second antifriction materials having different wear characteristics determined by the different wear rates to which they are subjected.
摘要:
A sealant nozzle for applying sealant to the countersink surface of a drilled countersunk hole, the nozzle configuration including a circumferential groove on a conical surface for depositing the sealant in a confined region within the countersink, and a pilot portion for insertion into a bore associated with the countersink.
摘要:
A machine is disclosed for applying an inner lining to a tubular article. The machine is introduced in the interior of the tubular article, centered herein and has the configuration of an inner expansible core. Sealing rings are then applied to close the ends of the annular gap so provided and the inner coating material cast in the gap while air is concurrently discharged. An improved centering mechanism for such machine is also described. Core expansion can be obtained both pneumatically and mechanically.
摘要:
A container structure, as for use in storing or transporting articles, has a pair of end caps at the axial ends of the intermediate or hollow body portion thereof. The end caps have inner and outer skins separated by and bonded to plastic foam material. The inner and outer skins of the end caps each has an annular lip portion extending axially inwardly toward the medial portion of the body, with the lip of the inner skin extending axially inwardly farther than the lip of the outer skin. The end caps are placed on a mandrel and an inner body skin is wrapped around the inner lip of the end caps while the outer body skin is wrapped about the outer lip of the end caps. Plastic foam material also separates and is bonded to the inner and outer body skins. Also, the disclosure relates to the method of producing the container structure.