Abstract: An electrical mold clamping apparatus of a plastic injection molding machines includes a motor unit mounted onto a link base for driving a gear at an end of a ball screw in the link base to rotate and a ball screw socket disposed at a fixed base, and the other end of the ball screw of the link base is screwed into the ball screw socket. When the motor unit drives the ball screw to rotate, the link base is displaced with the rotation of the ball screw to achieve the effect of reducing the load of the motor unit as well as the loss of energy.

Abstract: An angled-outward toggle clamping type vertical injection molding machine is provided, in which a stationary platen is provided on a frame and a toggle mechanism is provided below the stationary platen. A coupling seat pivotally connected with the toggle arms of the toggle mechanism is fixed with tie bars which extend over above the stationary platen to assemble with the movable platen. An upper die and a lower die are respectively assembled to the movable platen and the stationary platen. When the toggle mechanism drives to open or clamp the dies, the clamping force of the dies can be increased and the action force of the toggle arms in their centered position is dispersed at two sides of the stationary platen so as to protect the stationary platen from deforming or damaging.

Abstract: A double color injection machine with a shaft and a disc is revealed. The double color injection machine includes a main body with a shaft and a disc. The disc is arranged with a slotted hole while the main body is disposed with an axial hole for being assembled with a shaft sleeve. The shaft sleeve is inserted through the axial hole to be mounted to the slotted hole of the disc. A first bearing is mounted in the slotted hole and is corresponding to the shaft sleeve. A servo motor is used to drive the shaft to rotate. Thereby by the shaft sleeve on the shaft corresponding to the first bearing of the disc, the shaft is not rotated with the rotation of the disc. When the servomotor drives the shaft to rotate, the disc is not rotated. At the same time, fast and precise positioning is attained.

Abstract: A double color injection machine with a shaft and a disc is revealed. The double color injection machine includes a main body with a shaft and a disc. The disc is arranged with a slotted hole while the main body is disposed with an axial hole for being assembled with a shaft sleeve. The shaft sleeve is inserted through the axial hole to be mounted to the slotted hole of the disc. A first bearing is mounted in the slotted hole and is corresponding to the shaft sleeve. A servo motor is used to drive the shaft to rotate. Thereby by the shaft sleeve on the shaft corresponding to the first bearing of the disc, the shaft is not rotated with the rotation of the disc. When the servomotor drives the shaft to rotate, the disc is not rotated. At the same time, fast and precise positioning is attained.

Abstract: An injection drive apparatus for injection molding machines is revealed. Liquid material is fed into a mold smoothly by a material feeding screw of a material feeding mechanism. Then a reaction force is generated to push the material feeding screw when the material feeding hole is nearly full of the material. Thus the material feeding screw and the slide mechanism assembled therewith are pushed to move backward. Later the injection mechanism is driven by the slide mechanism to move and act on the drive screw. Thus the slide mechanism threaded with the drive screw is driven to push the material feeding screw moving forward and squeezing the material for injection molding. Therefore, the load of the motor is reduced dramatically and the yield rate of the products produced by injection molding is increased due to the two-stage action-feeding of the material and squeezing of the material for injection.

Abstract: A toggle mechanism of an injection molding machine consists of upper and lower toggle assemblies, which are pivoted to a fixed tail support at a first end, and a movable mold support of an injection molding machine at a second end; each of the toggle assemblies has two toggles pivoted together, each of which has pivotal holes on two ends; pivotal rods are passed through corresponding pivotal holes of the toggles to pivot the toggles together; pivotal rods are used to pivot the toggle assemblies to the fixed tail support and the movable mold support; each pivotal rod has oil holes in radial and axial directions; the oil holes communicate with the pivotal holes of the toggles, and each toggle has an internal oil passage communicating with its pivotal holes; lubricating oil will circulate in the toggle mechanism after conduits and filtering barrels are connected to the pivotal rods.

Abstract: A device includes a sliding base, supporting posts, and hydraulic oil; the sliding base has cavities, an oil passage communicating with the cavities, and oil seals secured around respective cavities, and it is movable along a guide rail secured on a bed of an injection molding machine; the supporting posts each have a room on a lower end, and are inserted in respective cavities such that the rooms communicate with the cavities; the posts touch and prop a movable wall of the molding machine at upper ends, which wall is supported by and movable along guide rods, and has bushings around the guide rods; the hydraulic oil is injected into the sliding base and the posts until the axes of each bushing and the corresponding guide rod are aligned; thus, alignment of the axes of each bushing and the corresponding guide rod will be maintained when the movable wall is moving.

Abstract: An adjusting seat of an injection molding machine has a split-flow hydraulic pump secured thereon; the split-flow hydraulic pump is equipped with several oil input/output conduit sets; several hydraulic motors are secured on the adjusting seat and connected to respective ones of the oil input/output conduit sets of the split-flow hydraulic pump; each of the hydraulic motors has a toothed disk on an output portion thereof; the injection molding machine further has several gears, which are positioned around tie rods of the molding machine, and engage the toothed disks respectively; each of the toothed disks has a sub gear joined thereto while a chain is positioned over and engaged with the sub gears.

Abstract: A control mechanism includes two hydraulic cylinders, a valve connected to the cylinders, and an actuating unit for the valve; racks are joined to power output rods of the cylinders, facing each other, and engaging a gear secured on a rotary disk; the valve includes a body, and a rod made to stick out from the body at outward end by a spring; the rod can reduce an oil passage of the body after it is displaced further into the body, and the rod can block the oil passage substantially at an end of its displacement further into the body; the actuating unit is movable with one of the power rod, and has two sloping boards thereon such that the rod will be displaced further into the body when the actuating unit moves with the power rod, and when the sloping boards slide over the outward end of the rod of the valve.

Abstract: A mold locking device for a molding machine has a toggle assembly, and a transmission member. The toggle assembly has first toggle arms pivoted to a bearing disc of the molding machine, connecting arms pivoted to a movable mold base, second arms pivoted to both the first arms and the connecting arms, and has third arms pivoted to both the second arms and a co-moving disc movable between the bearing disc and the movable mold base. The transmission member has a power source, a connecting member and an elongated screw. The connecting member connects the power source and a nut turnably fitted on the co-moving disc; the screw is passed through the nut for permitting the nut to turn relative to, and move along, the screw. The screw is further connected to the movable mold base such that the movable mold base can be moved between a mold opening position and a closing position by the toggle assembly and the power source.

Abstract: An arm structure for an injecting molding machine includes a first arm, a second arm, a third arm and an oil pressure cylinder. The cylinder is positioned between a receiving disc and a movable mold base. The second arm and the third arm consist of plural pivotal plates located separately at two sides of the cylinder with a distance a little larger than the outer diameter of the cylinder. Further, the space between the two joints of the second arm and the third arm is a little larger than the outer diameter of the cylinder. So the two joints of the second and the third arms can pass the cylinder without colliding with the cylinder when the arm structure operates to move back and forth in opening and closing the mold. Thus, the size of an injecting molding machine is reduced to save transporting and packaging cost and needed space for installation.

Abstract: An arm structure for an injecting molding machine includes arms consisting of two pairs of two arms respectively having plural parallel pivotal plates having two ends pivotally connected with plural position plates of a receiving disc and a movable mold base. Each position plate has an outer end concave surface with a threaded hole. Each pivotal plate has an outer end is bored with a pivot hole and fits in a gap between every two position plates. Further, a tubular pivot has plural through holes spaced apart corresponding to the threaded holes of said outer end concave surfaces of the position plates for bolts to pass through and screw with the threaded holes. Then the arm structure is pivotally connected to the receiving disc and the movable mold base. Therefore, the arm structure is easily assembled with or disassembled from the receiving disc and the movable mold base by only screwing off the bolts, without need of removing the connecting rods.

Abstract: An arrangement of oil cylinders of a plastic injecting machine is provided which positions a large oil cylinder and a small oil cylinder respectively on both the left and right sides of an oil cylinder base and a bearing base. The large and small oil cylinders are located at such a distance away from a material injecting cylinder that the oil seals of the four oil cylinders are not heated by the electric heaters that heat the material injecting cylinder. By this arrangement, the oil seals have a normal service life. In addition, an oil route plate is located on the bearing base to secure oil pipes formed of hard steel connected between the four oil cylinders and an oil pump, to keep oil flowing smoothly.

Abstract: A mold locking device for an injection molding machine is provided. The device includes a stationary disc and a movable disc displaceable to lock a mold placed between the stationary disc and the movable disc. Four oil cylinders are provided to move the movable disc on four guide rods back and forth. Four push rods are provided, each having a front end secured to the movable disc and a rear end extending through four cylindrical tubes disposed with a respective one of four holes formed in a support disc. A piston disposed within a piston chamber formed in a front surface of the support disc is pushed forward to respectively push a shield plate. The shield plate displaces the four push rods so as to push the movable disc with a great force, after the movable disc has been pushed forward to lock the mold stably.