Abstract:
An apparatus for treating blanks of plastic material comprising a substantially cylindrical main frame structure, a central, coaxial cam drum which is mounted within same rotatably about its longitudinal axis and which is provided on its outside with working cams, and a plurality of treatment stations arranged in juxtaposed relationship around the periphery of the frame structure, with tools for processing the plastic blanks. The tools in a respective station are carried by vertically movable carriages, each of which is adapted to be moved up and down in the station by a cam follower guided by an associated cam on the cam drum. Each cam follower is carried by a drive carriage. The respectively associated tool carriages and drive carriages are each independently guided on the housing by vertical guide means and are interconnected by way of non-rigid connecting means. The guide means for the carriages are arranged in projection on to a plane perpendicularly to the direction of movement of the respective carriage, between the cam follower and the point at which a reaction force resulting from treatment of a said blank acts on the tool carriage.
Abstract:
The tubular body is laid in a horizontal position on a tapered suction drum and pivoted thereby into a vertical axis which is in coaxial relationship with the axis of a mandrel with a punch. The tubular body is then pushed from the surface of the suction drum on to the mandrel by a thrust member. The mandrel and/or the die is mounted displaceably in a vertical direction, which permits particularly stable and precise guidance. A plurality of dies with mandrels and punches associated therewith is disposed on a rotary member. In the course of a revolution of the rotary member, the tubular body on the mandrel is connected to a squeeze moulding in the die.
Abstract:
A method and a device are disclosed for feeding a number of strips of material of one constituent from different batches thereof, into each extruder of a single- or multiple-extruder system in order to ensure that the extruder product from each extruder is more consistently uniform. To achieve this, such a system is fed from one end from pallets deposited on conveyor belts so that a plurality of strips of material from different batches, but of the same mixture, are fed into each appropriate extruder hopper. The empty pallets are removed from the pallet system by a conveyor belt passing along the charging end.
Abstract:
Coated sheet molding compound (SMC) parts are produced by transferring mold devices between a main press and at least one auxiliary press and by completing the compressing and curing of the coated SMC parts during the transfer of the molds. In the main press the SMC sheet is compressed and cured to be formed into a desired shape, and the formed SMC part is coated in the mold, and in the auxiliary presses the other operation such as charging the SMC sheet, closing and opening the mold, removing the part, and the like are performed. Between the adjacent main press and auxiliary presses are means for transferring the molds between the respective presses. Levelling devices are provided associated with the molds for supporting the upper mold parallel to the lower mold, and during the transfer the coated SMC part is further compressed and cured in the mold by suitably controlling the levelling devices. This method can be sufficiently applied to mass production systems such as automobiles or the like.
Abstract:
Washing and disintegrating means serve to wash and disintegrate the waste material and to continuously deliver the resulting washed and disintegrated material. A first conveyor serves to receive said washed and disintegrated material from said washing and disintegrating means and to remove water from said washing and disintegrating means and to remove water from said material. A dirt separator serves to receive said washed and disintegrated material from said first conveyor and to remove dirt from said washed and disintegrated material and to deliver the resulting cleaned material. A second conveyor serves to receive said cleaned material from said dirt separator and to remove water from said cleaned material. A water collector serves to receive water removed by said second conveyor. A return conduit serves to deliver water from said water collector to said dirt separator. Continuously operable drying means serve to receive said cleaned material from said second conveyor and to dry said cleaned material and to continuously deliver the resulting dried material. A buffer serves to receive said dried material from said drying means and to intermittently deliver said dried material. Intermittently operable agglomerating means serve to receive said intermittently delivered dried material from said buffer and to transform said dried material into an agglomerate.
Abstract:
Apparatus for molding of filament-reinforced plastic rods, such apparatus having an improved shaping device for expressing air from a longitudinally advancing, elongated mass, comprised of a bundle of filaments embedded within an unset plastic material, and for imparting a desired round cross-section to such mass during the continuous travel thereof.
Abstract:
Plasticizable material is pressure molded into articles free from flash in mold cavities of specialized molds defined by separate mold sections with removable cores. Prior to and during molding, the sections are held clamped together to fully confine the material which is pressurized by reducing the volumetric capacity of each cavity. This pressurization is maintained until the material is set or cured, and may be increased before final set to forge or densify the material further. The method employs a conventional press and two gangs of specialized two-piece, multi-cavity molds. The molds of each gang are supported in a horizontal row, with their juxtaposed flat faces and parting planes disposed vertically, for movement of each mold section flatwise endwise of the row to open and closed positions. The mold sections are clamped closed by power means which apply extraneous clamping pressure independently of the press operation. The gangs are supported so that as one clamped gang is moved into molding position in the press the other clamped gang is moved out of the molding position to an unloading and recharged position wherein it is unloaded and recharged while molding is being effected by the gang in molding position. Each mold cavity has an entry passage which opens through the upper edge of its associated mold sections. In the charge position, predetermined charges of the material are introduced into the cavities, respectively, through the entry passages. The clamped gang is moved as a unit into the operating or mold space of the press. Therein, plungers, carried by the press platen and driven by the closing force of the press, enter the entry passages and move therealong so as to progressively reduce the volumetric capacities of the cavities concurrently and thereby pressurize and forge the material therein to the degree desired. The extraneous clamping pressure is sufficient pressure to prevent any escape of material from the cavities at the parting surfaces of the mold sections.
Abstract:
A plurality of groups of mandrels are arranged for movement successively through a plurality of workstations with each group being worked on at a station while other groups are being worked on simultaneously at other stations to produce continuously automatically groups of retractile cords. Cordage is fed from a supply into clamping engagement with each of the mandrels in the group in a cord-loading position and then wound in a plurality of spaced-apart convolutions on each of the mandrels of that group after which the wound cords are severed from the cordage supplies. The wound cords are advanced incrementally through a heating zone, wherein the cords are exposed to radiant heating supplemented by preheating of the mandrels while cordage is being wound on the next successive groups of mandrels. The wound heated cords in each group are advanced through a cooling zone and then to an unloading station whereat the wound cords are removed from each mandrel to reverse the pitch of the helices of the convolutions and in a manner that the pulling forces imparted thereto are such that the tendency of the convolutions to enlarge is minimized.
Abstract:
A method of producing an asphalt roofing composition as well as a novel roofing composition product is disclosed wherein the usual felt base is eliminated. Layers of flowable, viscous asphalt are applied over a moving belt surface and a fiber glass material is introduced between the two layers. In a preferred form, a release agent is placed between the first layer of asphalt applied onto the moving belt surface so as to afford easy removal of the laminated asphalt composition from the belt. The feltless, laminated roofing composition has the advantage of eliminating the use of the usual saturators associated with felt backing type shingles and at the same time affording the reuse of any scrap material.
Abstract:
A packaging apparatus for applying and heat sealing a sheet of material to another sheet of material having a plurality of uniformly spaced food receiving recesses therein and thereafter cutting the sealed pockets into individual packages, there being provided a heating platen against which one of the sheets is blown to soften the sheet with a die positioned on the opposite side of the heating platen into which the softened sheet is drawn or forced to form the pocket in the sheet. One of the sheets is fed from a supply roll holder assembly defined by an axially movable slide on a spindle that permits alignment of the supply roll with an adjustable retaining ring on the slide to accommodate for varying width supply rolls. There is further provided a plurality of retaining clips for holding one of the sheets during manipulation, supported on a chain drive with the clips being opened by a plurality of overlapping rollers that converge on actuating elements on each of the clips to open the same.