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5840222 |
Method for injection-molding workpieces
A method for injection-molding workpieces in a mold of an injection-molding machine is disclosed. The method provides a means of conducting test cycles during the initial setup of the machine at...
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5820891 |
Apparatus for making optical disk substrates
A molding apparatus produces high-density thin type optical disk substrates having good replicability and birefringence sufficient for practical use. In filling the resin into the cavity, the...
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5820887 |
Apparatus for slip form production of prestressed concrete railroad ties
Pre-stressed concrete railroad ties are manufacture by the slip form process in the absence of mold members, other than the slip form itself. Tie casting occurs on a portable casting soffits...
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5820797 |
Process for controlling a mold closing unit for use in an injection molding machine
In a mold closing unit for use in an injection molding machine for processing plastifiable materials comprising a first device for transfering a movable mold carrier and a second device for...
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5814251 |
Molding method of injection molding machine
A method of operation for an injection molding machine is disclosed. The injection molding machine includes an injector having an advancable screw and a barrel cylinder, and a mold clamp for...
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5814354 |
Centering equipment for use in a blow molding machine
A method of controlling a blow molding machine from a completion of production of one product to a start of production of a next product comprises controlling a temperature of a resin within the...
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5804224 |
Driving apparatus for electrically-operated injection molding machine
A driving apparatus for an electrically-operated injection molding machine not requiring any bearing nor any connector. An electric motor having a rotor shaft on which a ball screw is integrally...
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5800843 |
Apparatus for injection molding plastic material
An apparatus for injection molding thermoplastic material has mold halves carried by stationary and movable mold mounting plates which are mounted on a frame. A control mechanism actively applies a...
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5800844 |
Dough press machine
A dough press machine for flattening a quantity of dough usable as a crust for a food product such as a pizza pie. The machine has a vertically movable upper platen having a bottom surface and a...
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5800750 |
Method for mold protection of crank-type clamping unit
A method and apparatus for mold protection of motor-driven clamping unit is provided. The method and apparatus is based on high response characteristics of the motor and a new control method. A...
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5800846 |
Twin-sheet thermoforming apparatus with hydraulic array mold support
An upper thermoforming mold is positioned above a lower thermoforming mold on a platen. The platen is provided with an array of position-controlled hydraulic cylinders. A controller drives the...
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5795510 |
Method of press-molding thermoplastic resins
A thermoplastic resin is molded by a press-molding method wherein a thermoplastic resin in a molten state is compressed to flow between a pair of female and male molds so as to be formed into a...
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5792485 |
Pelleting press
A pelleting press for pressing from a powdery, granular and/or pasty material compacted rod-shaped pieces of said material, comprising a die (1) with one or more rotatable rolls (6) co-operating...
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5792392 |
Lens thickness adjustment in plastic injection mold
Method and apparatus for lens thickness adjustment in injection molding of thermoplastic vision-corrective spectacle lenses without manual addition or removal of shims, of inserts or of any other...
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5792396 |
Position detecting system for an injection molding apparatus
A position detecting system for an injection molding apparatus can detect the position of a plurality of movable portions of the injection molding apparatus. The position detecting system includes...
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5785910 |
Method for manufacturing laminate-molded products and apparatus therefor
The present invention is to improve a laminate molding method and a laminate-molding apparatus for manufacturing molded products that have an external appearance of excellent quality. For this...
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5785908 |
Process for electrically clamping molds to platens
An electric mold clamping mechanism containing a pair of clamping members is activated by an electric motor. The electric motor operates a threaded piston with acme threads which in turn operate a...
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5776516 |
Two-platen injection molding machine
A two-platen injection molding machine with a stationary mold carrier plate and a movable mold carrier plate which are connected via tiebars having piston-cylinder units which build up and cancel...
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5772932 |
Mold clamping control method for injection molding machine
A mold clamping control method capable of preventing any warp or strain on a molded product without stopping an injection pressure holding process so as to cancel the pressing force of an injection...
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5759591 |
Apparatus for thermoforming a plastic appliance door
Apparatus is provided for thermoforming a unitary plastic appliance door by thermoforming an outer door panel and an inner door liner and joining them together in a unitary apparatus. The apparatus...
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5753153 |
Method for mold clamping units
A system and process for controlling mold activity of a molding machine is disclosed and includes a clamping device for positioning a movable mold platen on a carrier device and relative another...
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5741457 |
Method for introducing mold materials into a mold
A mold material introducing apparatus for introducing mold materials into a mold includes material supplying means for supplying a predetermined amount of mold material into the mold, moving means...
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5723079 |
Method for controlling the injection speed of injection molding machines and an apparatus therefor
A method for controlling the injection speed of injection molding machines and an apparatus therefor in which a driving force for forwardly moving an injection plunger movably inserted in an...
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5720918 |
Method and apparatus for closing tool of plastics processing machine
A method and an apparatus for closing the tool of a plastics-processing machine, especially a blow-molding machine, concerns a two-part tool (1, 2) which is supported by two tool mounting plates...
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5720988 |
Slide bottom dead center position compensating device
A slide bottom dead center position compensating device comprises an angle sensor for detecting a crank angle, a contact sensor for detecting contact between stoppers on molds or, instead of the...
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5705200 |
Multiaxis rotational molding apparatus
A method of continuously forming an integrally molded structure in a multiaxis rotational molding operation includes the steps of rotating a multisection mold assembly about at least three axes. A...
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5705105 |
Process for making optical disk substrates
A process for producing high-density thin type optical disk substrates having good replicability and birefringence sufficient for practical use. In filling the resin into the cavity, the stress on...
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5700416 |
Press molding of thermoplastic resins
A method for press molding a thermoplastic resin which includes the steps of supplying a resin melt in a cavity of an unclosed mold through at least one passage formed in a wall of the mold upper...
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5697996 |
Mold positioning apparatus and method
A mold positioning apparatus which is used in a pressing apparatus for pressing a work by a plunger and a bottom mold, comprising keys and key guides which are provided on a plunger and a bottom...
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5662945 |
Injection blow molding machine with stacked molds
A method and apparatus for forming plastic hollow articles such as containers which includes a turret that includes an upper head and a lower head, each of which supports circumferentially spaced...
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5658518 |
Method and apparatus for compression molding closure liners
A method and apparatus for compression molding closure liners wherein a set of tooling including a first assembly and second assembly which are movable toward and away from one another. The first...
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5656214 |
Blow molding machine
A method of controlling a blow molding machine from a completion of production of one product to a start of production of a next product comprises controlling a temperature of a resin within the...
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5645667 |
Method for applying a viscous material edge strip to a corner area surface
A method is utilized in which, when approaching the corner, a nozzle is rotated from a position with a nozzle slot positioned essentially transversely with respect to the longitudinal direction of...
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5645776 |
Method of encapsulating semiconductor devices by a direct drive electro-mechanical press
A method for encapsulating semiconductor devices includes the steps of: providing a molding system and a close-loop control system which is coupled to the molding system, the close-loop control...
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5633017 |
Device for manufacturing cushion or mattress elements in supple cellular material
This invention relates to a process for manufacturing cushion and mattress elements made of supple, open-cell cellular matter, by casting into a mould, from a head ensuring mixture of at least two...
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5626803 |
Process for economical manufacture of brushes of predetermined anisotropy
A process for manufacturing brushes for electric motors utilizing a female die with two sheaths intersecting at 90° from each other, one sheath vertical and the other sheath horizontal, and each...
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5626885 |
Method of manufacturing an optically readable disc, and arrangement for carrying out the method
An arrangement is provided for a method of manufacturing optically readable discs in which a substrate is placed on a movable substrate carrier and by moving the substrate carrier it is...
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5626804 |
Roller position controller for a continuous belt press
The present invention provides a roller position controller for a continuous belt press whereby the positions of the rollers supporting the belts are monitored and controlled, so that their...
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5614226 |
Auto-venting for polyurethane foam
A device for molding foam products including upper and lower portions cooperable to form a foam mold defining a mold cavity therein. The upper mold portion has at least one vent hole therein. A...
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5609801 |
Clamping method of injection and compression molding machine
A clamping method of an injection and compression molding machine, includes the steps of moving a movable mold 2 up to a pre-clamping position Sf located before a final clamping position Se,...
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5597519 |
Ultraviolet cycling oven for polymerization of contact lenses
A method and apparatus for molding contact lenses by curing polymerizable compositions in suitably dimensioned molds using ultraviolet or other polymerization-inducing radiation and heat. The molds...
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5593708 |
Apparatus for bending plastic pipe
A bending process including both preliminary and following steps takes place in one apparatus. A plastic pipe (6) is heated to a temperature in which it can be plastically deformed. The heated pipe...
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5585053 |
Method of controlling a movable member in a molding machine
In a method of controlling a movable member in a molding machine, a speed of movement of the movable member which is moved by driving device is detected, the speed of movement thus detected, and a...
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5582782 |
Method of stopping a die of an injection molding machine and a die clamping apparatus
An injection molding machine has a die clamping apparatus which effects die closing, die clamping and die opening. A die open-side stop position can be accurately set without using any restricting...
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5582846 |
Apparatus for forming compressible material into discrete solid blocks
An apparatus for forming compressible material into discrete solid blocks or briquettes in which the material is compressed in a compression chamber by a pre-press ram and a main ram. A control...
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5580584 |
Injection molding machine
An injection molding machine which includes an injection molding unit, a plurality of electrical servomotors for driving components of the injection molding unit, and a plurality of power and...
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5580586 |
Die control speed rate conversion device for powder mold press
A die control speed rate conversion device for a powder mold press wherein the timing for oil release from a hydraulic circuit can be obtained by the angle signal (position signal) from a rotary...
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5562929 |
Apparatus for optically shaping photo-setting resin
A photo-setting resin is shaped into a three-dimensional resin model by scanning successive resin solution layers of a photo-setting resin solution with a radiation beam to form a stack of scanned...
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5556648 |
Quick bottle production changeover utilizing multi-cavity molds in an extrusion blow molding system
A blow molding apparatus is provided including a blow mold, an extrusion apparatus, a locator mechanism, and a blow pin. The blow mold has first and second blow mold halves which are engageable and...
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5554392 |
Apparatus for forming walls
The invention relates to an improved apparatus for the production of substantially vertical walls, and specifically, walls made of concrete which includes a single sided concrete form used, for...
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