Matches 1 - 50 out of 199 1 2 3 4 >
Match Document Document Title
7404713 Inlet nozzle for hot runner system  
A shutoff valve mechanism for a plastic injection molding system and process. The shutoff valve mechanism is positioned between the nozzle of the injection molding machine and the hot runner...
7396227 Hot runner sprue  
When a molding machine nozzle is separated from a nozzle touch surface of a hot runner sprue, application of external pressure on resin in a resin supply passage is stopped. At this time, back...
7377769 Discharge apparatus for two-stage injection molding machine  
A discharge apparatus for a two-stage injection molding machine, includes a check shaft seat having a runner, and disposed between a feeding portion and an injection portion of the two-stage...
7326048 Valve nozzle  
The valve nozzle according to the invention is constructed so that, in the internal space of a valve nozzle main body, a gate opening and closing mechanism is disposed in which a piston having a...
7322817 Injection molding nozzle for plastic with at least two outlet openings  
An injection molding nozzle ( 1 ) for plastic with at least two outlet openings ( 2 ) facing toward different sides and directed oppositely is not constructed as an open injection molding nozzle...
RE39935 Multi-cavity injection molding apparatus splitting melt near nozzle front  
Valve gated injection molding apparatus having several valve pins (62) extending through each heated nozzle (12) driven by a common actuating mechanism (70). A valve bushing (100) is seated in the...
7296993 Poppet valve assembly  
A check valve assembly for use in a plastic injection molding machine injection unit is disclosed. The check valve utilizes a free-floating poppet member which has tapered angularly spaced-apart...
7287549 Valve pin cross over nozzle for stack mould  
According to the present invention, a cross over nozzle ( 10 ) is provided of two parts ( 22,24 ) which, when joined, define a housing ( 20 ) having a passage ( 30 ) extending therethrough, a...
7270536 Screw tip and molding system apparatus  
A screw tip for use in a molding system apparatus is disclosed. The screw tip includes a connection section and screw tip head section. The screw tip head houses an entry port, or entry ports, an...
7252500 Check valve assembly for injection molding apparatus  
An injection molding apparatus which includes a check valve assembly mounted at the forward end of a feed-screw, the valve assembly having forward and rearward valve seat surfaces which co-act in a...
7244118 Hot runner nozzle and manifold seal  
An injection molding apparatus includes combined sealing elements located between a nozzle head of an injection molding nozzle and a mold plate. The sealing elements are arranged so that they force...
7241132 Backflow prevention device for in-line screw injection molding machine  
A screw tip is provided in front of a screw with a shaft interposed therebetween, and a check ring is fitted around the shaft. The check ring is separated from a front end portion of the screw when...
7234929 Injection molding flow control apparatus and method  
In an injection molding machine having upstream and downstream channels communicating with each other for delivering fluid material to one or more mold cavities, apparatus for controlling delivery...
7210922 Valve pin operating mechanism  
A hot runner injection molding apparatus includes a manifold for transferring molten plastic into a channel to a mold gate. A valve pin extends at least partially through the channel and is...
7189071 Telescopic manifold nozzle seal  
An injection molding apparatus including a manifold having a manifold melt channel, a nozzle having a nozzle melt channel, a slidable seal having seal melt channel located between the nozzle and...
7172333 Injection molding screw  
An injection molding screw for metal injection molding includes a first end, a second end, a longitudinal body with a first stage and a second stage extending axially along a length of the screw...
7125242 Decompression device for an injection molding apparatus  
A sprue bushing includes a melt channel for receiving a melt stream of moldable material from a source. The melt channel includes a first portion, a second portion and a decompression cavity...
7125246 Hot runner for molding small plastic articles  
A hot runner system for injecting plastics material from a plasticizer unit into an injection mold for molding very small plastic devices, includes a hot runner manifold having an inlet for...
7033163 Backflow prevention device  
A backflow prevention device for an injection molding machine includes a screw tip having a tip end, a central body member connected to the tip end, a thrust ring at a rear end of the body member,...
6857867 Backflow prevention device  
A backflow prevention device for a plasticizing and injection screw axially movable in a plasticizing cylinder of an injection molding machine, includes a base body having a leading head portion...
6840757 Injection nozzle for mixing heads of reaction casting machines  
An injection nozzle for mixing heads of reaction molding machines is disclosed which comprises a housing in which a adjustment assembly is provided for slidably moving between two adjustable stops,...
6811393 Valve pin cross over nozzle  
According to the present invention, a cross over nozzle is provided of two parts which, when joined, define a housing having a passage extending therethrough, a tapered valve seat extending about...
6793480 Shutoff valve assembly  
A shutoff nozzle and valve assembly for gas-assisted injection molding having a nozzle body, a shutoff pin, a helical spring, a spring guide and a gas-injection valve assembly. The shutoff nozzle...
6676401 In-mold gate opening and closing mechanism and metal mold for injection molding  
The present invention relates to an in-mold gate opening and closing mechanism in which it is easy to adjust the gate balance, more specially, in an in-mold gate opening and closing mechanism, in...
6655945 Apparatus and method for multi-layer injection molding  
An injection molding apparatus and method for multi-layer molding of preforms and closures has a central melt channel, an annular melt channel radially spaced from the central melt channel, and an...
6585001 Flow through ring valve for plastic extruding systems  
A three piece, sliding ring valve for use in a plasticating screw and barrel arrangement has an extended life. The sliding ring has apertures for passing molten resin therethrough. The sliding ring...
6558148 Gas valve pin mechanism  
A valve-gate mechanism for use with gas-assisted plastic injection molding systems. A moveable pin mechanism is positioned in a bushing or machine nozzle to regulate the injection of plastic...
6554603 Plastifying unit in injection-moulding machines with a nonreturn valve  
The invention relates to a plasticizing unit in injection-moulding machines, in particular for processing thermoplastics, with a plasticizing cylinder in which a rotatable and axially displaceable...
6499987 Positive control non-return valve for an injection molding machine  
An improved positive control non-return valve assembly which is mounted on the front end of a helical plasticating screw of an injection molding machine. The valve assembly comprises a thread...
6464488 Sliding ring non-return valve  
A sliding ring non-return valve primarily for use with an injection molding machine utilizes a frame having cut therein one or more longitudinal grooves. Material flows around the outer edge of a...
6435201 Non-return valve  
The invention relates to a non-return valve, which is situated at the end of a plasticizing and injection screw to control the flow of plastic melt from the region of the screw channels of the...
6227841 Valve and pinned screw point assembly  
An extruder assembly for an injecting moulding machine in which the screw point pin has a small diameter that can float and is self-centering. The pin has two support points or flats. The screw...
6155816 Return flow shut-off device for an injection unit in an injection moulding machine  
A backflow blocking arrangement is for an injection unit of an injection molding machine having a plasticising screw with a front end for carrying the backflow blocking arrangement. The arrangement...
6113380 Back flow-prevention apparatus  
A back-flow prevention apparatus is composed of a screw and a platelike closing member. The screw includes at least a metering portion having a groove formed thereon for advancing a resin. The...
6106275 Molding press apparatus  
An injection press apparatus for molding/joining separate parts. The apparatus having a work table with first and second work stations for injecting material into a mold. A movable...
6056537 Injection moulding device having temperature control to prevent vulcanization  
The invention concerns an injection molding device which has an injection unit (1) comprising an injection cylinder (20) and an injection piston (10) travelling inside it. The injection cylinder...
6033205 Reciprocating screw for an injection molding machine  
A reciprocating screw for an injection molding machine includes a heating extruder barrel in which the reciprocating screw is mounted rotatably. The barrel has an extruder head and a tail portion....
6007322 Back-flow prevention apparatus  
A back-flow prevention apparatus includes a screw which includes a metering portion and a screw head; a seal ring which is removably disposed on a rear portion of the screw head and which has a...
5975127 Shut-off valve  
A shut-off valve is mounted between an injection nozzle and a mold. The valve has a piston within the valve body, A material passage is formed through the piston having an exit aperture and a...
5948444 Injection plug device for injecting concrete repairing agent into a concrete structure  
An injection plug device for injecting concrete repairing agent into a concrete structure and a connector to be connected to such an injection plug device are provided. The injection plug device...
5945141 Screw head device for injection molding machine  
A screw head device 1 for an injection molding machine includes a ring valve 3 set on a stem portion 2 of a screw head for movement in back and forth direction and for defining a rear side resin...
5849344 Injection molding apparatus  
An injection molding apparatus comprising an injection unit having a plurality of injection nozzles of which respective distal end portions move back and forth between a first position and a second...
5849236 Method and apparatus for plastic injection molding flow control  
An apparatus and method for injection molding of thermoplastics has elements and steps comprising mating mold components having multiple mold cavities with flow passages and a plurality of conduits...
5667819 Apparatus for injection molding of multi-layer objects  
A method of injection molding of workpieces, formed of at least two different layers, and which includes forming at least one layer from lacquer, with the apparatus for effecting the method...
5518394 Injection screw  
A penetration hole of plasticized resin is pierced in a screw head, so that the resin may be accumulated in uniform temperature distribution without sacrificing the function of the injection screw....
5501594 Apparatus for forming a thermoplastic body  
An improved hot tip (40) for forming a thermoplastic body having a mold cavity (42) and a gate portion (44) has an elongated body member (46) and a channel (48) passing axially through the body...
5470514 Injection molding method for a shot of determined mass  
A non-return valve (10) primarily for use with an injection molding machine utilizes a frame (12) which surrounds a first bore (34) and a second bore (32). The second bore (32) is accessed by...
5460510 Valve gated stack injection molding apparatus  
Valve gated stack injection molding apparatus with an upstream heated nozzle seated in a fixed mold platen and a downstream heated nozzle seated in a movable mold platen. The melt flows through a...
5441400 Spring biased check valve for an injection molding machine  
An improved check valve assembly which is mounted on the front end of a feedscrew of an injection molding machine has a check ring which is slidably mounted on the shank of a retainer within the...
5439633 Plastic extruder having a mixing valve with automatic shut-off  
An apparatus and method for controlling thermoplastic mixing in a plastic extrusion machines used for injection molding, blow molding or other reciprocating molding process. The plastic extruder...
Matches 1 - 50 out of 199 1 2 3 4 >