Abstract: A clamping system includes a fixed platen fixed to one end of a machine base and a plurality of clamping cylinders, the fixed platen holding a fixed mold therein, a movable platen fixed to the other end of the machine base and holding a movable mold therein, a plurality of tie bars extending through the movable platen and including pistons at their one ends, the pistons being slidably received within the clamping cylinders, and screw threads or grooves substantially at their longitudinal center, a unit disposed between the movable platen and the fixed platen and operable to move the movable platen to and from the fixed platen, two-part nuts mounted to the movable platen and meshingly engageable with the screw threads or grooves of the tie bars, and stoppers each of which is engaged with a recess provided on each of the tie bars mounted to the movable platen on the side opposite to the fixed platen characterized in that screws are threaded at end portions of the tie bars on the side of the fixed platen, screws
Abstract: The plasticizing and injecting unit comprises at least one hydraulic advance-retract actuator that is provided with external screw threads, which are screwed into internal screw threads of a bore formed in a carrier and supply block. Means for locking the advance-retract actuator in the bore in that the interengaging screw threads are wedged against each other comprise a plurality of lock screws, which are parallel to the injection axis and disposed on a circle that surrounds the bore in which the actuator is received. The screws can be tightened to different degrees so that the carrier and supply block and the advance-retract actuator are biased in mutually opposite senses and any deviations from a coaxial arrangement of the interengaging screw threads can thus arbitrarily be changed in its magnitude and direction. As a result, the stresses which result in the overall structure from a deviation from a coaxial arrangement can be minimized by a simple manipulation.
Abstract: The hydraulic system comprises a 4/4-way valve, which is adapted to control the velocity of the mold-closing operation and the fluid pressure during said mold-closing movement and to assume three consecutive control positions, in each of which fluid pressure is applied to a stationary piston of an advance-retract cylinder from a first cylinder chamber, which is nearer to the mold. One of said control positions is a differential control position, in which pressure fluid displaced from the second cylinder chamber of said advance-retract cylinder, which second chamber is remote from the mold, is supplied to a pressure conduit through a branch passage, which includes a non-return valve. The differential control position is preceded and succeeded by a transitional control position, in which the pressure fluid displaced from the second cylinder chamber is returned through the 4/4-way valve to a reservoir.
Abstract: The invention relates to an apparatus for adjusting the length of dough strands, comprising a receiving gutter, V-shaped in cross-section, whose walls are defined by elements which engage a dough strand placed in the gutter at regularly spaced apart locations along the length of the dough strand and can exert axial forces thereon. According to the invention, the elements which define the walls of the receiving gutter and engage the dough strands are formed by rolling members arranged with interspaces and adapted to be driven progressively and selectively from the middle (X--X) of the gutter in either direction, and support members which convey the strands transversely of the gutter are arranged between the rolling members. The mutual arrangement of the gutter and of the support members is variable, at least as to the relative level.
Abstract: A die for making a flat-paneled flower pot or flower pot cover by forming a sheet of material into a flat-paneled flower pot or flower pot cover. A platform supports a female die having an opening with flat surfaces for forming panels in the base and skirt of the flower pot or flower pot cover. The sheet of material is centered over the opening of the female die. A bracket having a plurality of legs which align with the panel-forming surfaces of the female die is placed on the sheet of material. The top surface of the platform and the bracket legs frictionally control the sheet of material as a male die pushes the sheet of material into the female die. A plurality of pivoting fingers at the upper end of the female die push the sheet of material against the male die as the male die enters the opening of the female die. The sheet of material is pressed between forming surfaces of the male and female die to form the flat-paneled flower pot or flower pot cover.
Abstract: A mortar course tool has a tray with a sliding plate which slides under a rectangular open frame surrounding the plate to close a mortar wafer dropping gap formed by the frame while the mortar is being carried to a brick wall; the sliding plate slides away from the frame to open the gap dropping a wafer of mortar of brick top area and mortar course thickness. Runners behind and connected to the frame telescope into sleeves behind and connected to the plate in an arrangement clear of mortar to enable frame and plate to be moved towards and away from each other by means of a cross bar pull handle on each.
Abstract: A rod guide remover is provided for splitting rod guides away from a sucker rod without risk of damage to the rod. A set of opposing blades are used which are kept a selected distance apart by stop members that abruptly contact a set of rod supports for preventing injury to the rod. The gap distances are selected over a relatively narrow range to insure complete splitting of all types of guides yet provide sufficient tolerance to protect the rod.
Abstract: A device for flat-rolling a ball of dough to obtain a sheet of dough which has substantially straight front and rear edges. The device includes a framework for rotatably supporting a pair of rolls through which the ball of dough is passed, the rolls being supported such that they may move towards and away from each other, a biasing means being present to press the rolls towards each other, the biasing means being including at least one pressurized fluid cylinder to which pressurized fluid is supplied in such a way that in case of varying resistance of the dough a virtually constant opposing force is exerted onto said dough.
April 4, 1990
Date of Patent:
June 9, 1992
Werner & Pfleiderer-Haton B.V.
Theodoor H. F. Van Den Berg, Mathijs Steeghs
Abstract: An elastic material covering an outer surface of a cavity plate but not covering any clamping surfaces of the cavity plate or the inner surface of the cavity plate is used to eliminate use of a dam bar in a lead frame. In an embodiment in accordance with the present invention the elastic material provides a supplementary seal to the clamping surfaces of the cavity plate and a primary seal in spaces between leads of the encapsulated lead frame. In a method of using the present invention, the elastic material is placed between the mold base and the cavity plate. A semiconductor lead frame to be encapsulated is placed in cavities provided by the cavity plate. The mold is closed so that clamping surfaces of the cavity plate clamp directly onto the leads. The elastic material deforms under pressure to compensate for any dimensional variations of the mold plates or lead frame and completely seals the space between leads.
Abstract: A mechanical locking mechanism for an injection mold is disclosed for holding a core rod in place in the mold cavity to resist movement caused by the injection molding pressures. The locking mechanism includes a pair of cam shafts, one carried by each of the mold halves, having a cam engagable with a concave recess in the core rod. When the mold halves are closed upon the core rod, the cams engage a portion of the recess surfaces facing toward the mold cavity. The cam shafts are subsequently rotated to move the cams to a second portion of the recess surfaces which is facing away from the mold cavity whereby the cams resist movement of the core rod away from the injection mold cavity.
Abstract: A transparent elastomeric mold 30 capable of precisely reconstituting the buffer coating surrounding an optical fiber 54. The inventive elastomeric mold 30 is disposed to shape a buffer coating applied to an optical fiber in accordance with the dimensions of a master fiber 32. The mold 30 includes an elastomeric slab 38 for substantially confining the buffer coating within a channel 48 having a cross-sectional dimension substantially identical to that of the master fiber 32. The slab 38 includes an inner surface 50 which defines the channel 48 along a longitudinal axis L. The inventive mold 30 may also include an arrangement of arm members 34, 36 for flexing the elastomeric slab 38 in order to open the channel along the longitudinal axis L.
Abstract: A plurality of paint spray guns are directed substantially perpendicularly toward respective vertically divided surfaces of a side panel of a workpiece such as an automotive body. The paint spray guns are spaced in a direction in which the workpiece is delivered and being disposed at different heights, respectively. Paint sprays are ejected from the paint spray guns toward the workpiece which is being delivered in the direction. Simultaneously, the paint spray guns are displaced back and forth perpendicularly to the direction and substantially parallel to the surfaces of the side panel to coat the surface respectively with the paint spray guns, thereby coating the side panel.
Abstract: A clamping system for traversing and clamping molds in a molding machine, the clamping system including a toggle-type clamp arrangement defined by a plurality of pivotally connected links. A movable crosshead is connected with one end of the toggle and is carried on a crosshead guide, and a ball screw is rotatably secured to the movable crosshead to extend in the direction opposite from the molds and through a stationary platen. A ball nut rotatably carried by the stationary platen is in engagement with the ball screw and is drivingly connected with a first motor to axially move the ball screw to provide between the molds a clamping force sufficient to resist separation of the molds during high pressure injection of molding material. A second motor is drivingly coupled with the ball screw and is movable therewith in an axial direction. The second motor is adapted to rotate the ball screw for rapid traverse movement of the movable crosshead to rapidly bring the molds into and out of contact.
Abstract: There is disclosed an air knife for preventing transfer of liquid from one container to another. The air knife comprises an expansion chamber having a product inlet opening on to one container and a product outlet opening onto a second container. Around the circumference of the expansion chamber is positioned a distribution chamber. Air is input to the distribution chamber through an air inlet and a large bore inlet and passes around the whole of the annular distribution chamber. Several evenly-spaced small bore inlets allow ingress of air from the distribution chamber into the expansion chamber. The air, at a pressure greater than the fluid outside the product inlet and product outlet is forced out of the product inlet and product outlet thus forcing liquid adhering to an elongate product, such as a strip of components being electroplated, passing from the product inlet through the expansion chamber and out of product outlet, off the elongate product.
Abstract: A modification to a multiple cavity tire press places a plurality of hydraulic cylinders beneath the lower mold half and heat platen of each mold in the press. The size of the side links of the press is adjusted so that in normal operation, the side links only bring the upper and lower mold halves into close registration and hydraulic pressure applied to the lower mold halves through the plurality of hydraulic cylinders gives the squeeze to the press halves, as well as eliminating or minimizing the malocclusion of the mold halves known in the prior art due to deflection of the respected upper and lower portions of the mold by application of mechanical squeeze.
Abstract: A system for applying a coating of wax and fungicide to the surface of fruit applies the coating in two stages. The first stage sprays onto the fruit a mixture of both wax and fungicide, while a second stage sprays onto the fruit wax alone. The fungicide is thereby concentrated immediately adjacent the fruit, where it is most effective in controlling fruit decay, and the wax is at its full concentration at the outside of the coating, where it can provide an optimum surface shine.
July 8, 1988
Date of Patent:
April 7, 1992
Fillmore-Piru Citrus Association
Kenneth C. Creason, John A. Salka, Ralph R. Holland
Abstract: A center mechanism for a tire mold comprising a mushroom-shaped bladder, a clamp ring for clamping a lower opening edge of the bladder, a post cylinder for extending and contracting a height of the bladder, a movable stopper for receiving a depressing force against the clamp ring which is generated by heating medium introduced into the bladder upon vulcanizing a tire, and a bladder elevator cylinder for elevating and lowering the clamp ring upon loading and unloading a tire.
Abstract: The invention describes a machine for producing packages for milk and comprising a tube of coated paper with means of forming the tube and means of integrally moulding synthetic plastics material onto the tube and with, extending along the machining path, a conveyor belt supporting a row of cross-sectionally quadrangular transport containers, with means of introducing the tube into the relevant transport container and with means of removing the finished tube and carrying it away.To increase the output from the package producing machine so that in particular the injection moulding tools can be more rapidly opened and closed, it is according to the invention proposed that a first part of at least one strand of the endless revolving conveyor belt extend at a fixed angle (.alpha.) of preferably about 45.degree.
Abstract: Gloves are made in situ on human hands by applying a glove-making fluid composition completely about the entire expanse of the hands within a chamber of an enclosure. The fluid composition solidifies to form glove-like coatings upon exposure to air.
Abstract: A device for measuring deformations in an elongated machine component, especially the doctor beam of a coater. A strip that can be elastically deformed or is resiliently mounted longitudinally and is secured to the machine component only at its tensioned ends is tensioned independent and in a straight line at a distance from the machine component. A sensor that measures any variation in its distance away from the strip is rigidly mounted on the component between the two ends of the strip.