KR20050004709A - A balancer injection molding machine mixed plastic compound and iron powder - Google Patents

Abstract

PURPOSE: A balance injection molding machine by mixing iron powder with plastic compound is provided to improve the quality of the product, and to cut down manufacturing cost by putting, extruding, mixing, transferring and injection-molding raw material and iron powder successively. CONSTITUTION: A nozzle(1-2) is formed in the end of an injection molding plunger body(1), and a mold(3) is installed in front of the nozzle. A hydraulic cylinder or injection sub motor(2) is installed in the rear part and connected to a plunger piston rod. A heater(4-4) is attached to the vertical wall of an inlet, and a screw of a mixing and transferring cylinder is turned by a low speed motor(5). An input port(6-3) of the mixing and transferring cylinder is connected to transfer pipes connected to a plastic extrusion cylinder(6) and an iron powder hopper(9) with a heater(9-3). The plastic extrusion cylinder is horizontally mounted, a hydraulic cylinder(7) is mounted in the screw rod of the plastic extrusion cylinder. A supply amount regulating unit is formed in a plastic raw material hopper(8).

Description

Injection molding apparatus for balance products made of iron powder mixed with plastic raw materials {A BALANCER INJECTION MOLDING MACHINE MIXED PLASTIC COMPOUND AND IRON POWDER}

The present invention relates to an injection molding apparatus for a balance product in which iron powder is mixed with a plastic raw material related to the Utility Model Application Nos. 2003-17609 and 2003-20406 filed by the applicant.

The balance product widely used in the conventional industrial field is preferably mixed with a large amount of iron powder when molding it. However, if a large amount of iron powder is contained, there is a mechanical strain of the injection molding machine. Utility Model Application No. 2003-17609, filed by the applicant of the present application, proposes to improve the problem by mixing and melting extrusion of mixed materials in a mixing extruder. After mixing and extruding it again with a plunger or a screw extruder, the balance product was formed by a press compactor, which is advantageous in comparison with the related art. However, there is a drawback that cannot be formed except a simple product. 2003-20406, which refers to rotating mixed material extrusion The mixture is melted by frictional heat with a rotating blade rotated at high speed, and the mixed and melted kneaded material is introduced into the plunger injection machine via a transfer cylinder, and then moved back and forth by a hydraulic cylinder or an injection servomotor. Because of the injection pressure of, it is possible to mold relatively sophisticated balance products in product molds, so it is expected to improve the productivity and quality, but it is necessary to prepare preparations for mixing raw materials separately, and the injection molding speed was slow. .

The present invention has been made to solve the above problems, the present invention is to install a mixed transfer cylinder connected to the low-speed motor on the upper portion of the conventional injection plunger body, the inlet is a hydraulic (pneumatic) cylinder or injection connected to the plastic raw material hopper The transfer pipe installed at the outlet of the extrusion cylinder rotated by the motor submotor and the transfer pipe installed at the iron powder material hopper outlet are connected to each other, which is the extrusion and injection of the molten raw material from the input of the plastic raw material and the input of the iron powder raw material. It is characteristic that this coherence proceeds.

1 is a perspective view of the present invention.

2 is a perspective view of a separate embodiment of the present invention.

3 is a perspective view of another separate embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1 ... injection plunger body 1-1 ... piston rod 1-2 ... nozzle

1-3 ... Heaters 1-4 ... Inlet

2 ... hydraulic (pneumatic) cylinder (or injection motor) 3 ... mold

4 ... Mixing feed cylinder 4-1 ... Equally spaced screw 4-2 ... Inlet

4-3 ... Outlet 4-4 ... Heater 4-5 ... Pulley

5 ... low speed motor 5-1 ... pulley 5-2 ... belt

6 ... Extrusion cylinder 6-1 ... Equally spaced screw 6-2 ... Heater

6-3 ... inlet 6-4 ... outlet 6-5 ... feed pipe

6-6 ... Heater

7 ... hydraulic (pneumatic) cylinder (or injection motor)

8 ... plastic raw material hopper 8-1 ... supply regulator

9 ... Iron powder raw material hopper 9-1 ... Supply regulator

9-2 ... Transfer Tube 9-3 ... Heater

101 ... Injection plunger body 101-1 ... Rod 101-2 ... Nozzle

101-3 ... Heater

102 ... hydraulic (pneumatic) cylinder (or injection motor) 103 ... mold

104 ... melt-mix transfer cylinder

104-1 ... Equally spaced screw 104-2 ... Heater 104-3 ... Transfer pipe

104-4 ... heater

105 ... hydraulic (pneumatic) cylinder (or injection motor)

106 ... Mixed Raw Material Hopper

201 ... injection plunger body 201-1 ... Rod

201-2 ... Nozzle 201-3 ... Heater

202 ... hydraulic (pneumatic) cylinder (or injection motor) 203 ... mold

204 ... Mixed feed cylinder 204-1 ... Equally spaced screw 204-2 ... Rod

204-3 ... Pulley 204-4 ... Heater 205 ... Submotor

205-1 ... Pulley 205-2 ... Belt

206 ... Mixed material extrusion barrel 206-1 ... Extrusion cylinder 206-2 ... Heated heater

206-3 ... Transfer pipe 206-4 ... Heater

207 ... Hopper 207-1 ... Transfer pipe

This will be described in detail based on the drawings.

A hydraulic (pneumatic) cylinder (or injection servomotor) is installed at the rear end of the piston rod 1-1 installed inside the injection plunger body 1 and at the front end of the nozzle 1-2 formed at the front of the product mold ( 3) is installed, a plurality of bend-type heaters (1-3) are installed on the outer circumferential wall at a predetermined interval and the inlet (1-4) installed in front of it is formed in the lower end of the mixed transfer cylinder (4) installed in the vertical direction The outlet port 4-3 is connected, and a plurality of bend-type insulating heaters 4-4 are installed at regular intervals on the circumferential wall of the mixed transfer cylinder 4, and inside the same interval screws 4-1 are installed. However, the pulley (4-5) installed on the top of the rod is connected to the pulley (5-1) and the belt (5-2) installed on the shaft of the low-speed motor (5) to the upper portion of the mixed feed cylinder (4) To the formed inlet 4-2, the front end of the feed pipe 6-5 provided at the outlet 6-4 of the extrusion cylinder 6 installed in the horizontal direction is opened. Although a plurality of bend heaters 6-6 are installed on the circumferential wall of the transfer pipe 6-5 at regular intervals, the rods of the equally spaced screws 6-1 installed in the extrusion cylinder 6 are installed. At the rear end, a hydraulic (pneumatic) cylinder (or injection sub-motor) 7 is installed, and an inlet 6-3 formed at an upper side of the extrusion cylinder 6 has a lower end of the plastic raw material hopper 8 in a supply amount adjustment hole ( 8-1) is connected through the other side of the mixing cylinder (4), the other side of the upper inlet (4-2) of the high-temperature dry iron powder hopper (9) at the lower end of the supply amount adjustment port (9-1) Although the transfer pipe 9-2 interposed is connected, the bend heater 9-3 is provided in the main wall of this transfer pipe 9-2 at a predetermined interval.

In carrying out the present invention configured as described above, when the plastic raw material and the iron powder raw material are put into the hoppers 8 and 9 and the power is applied, the extrusion cylinder 6, the mixed transfer cylinder 4, the injection plunger 1 The equally spaced screws 6-1, 1-2 and the plunger piston rod 1-1 are driven. At this time, if the feed amount is controlled by the feed amount adjusting holes 8-1 and 9-1 provided at the lower ends of the plastic raw material hopper 8 and the iron powder hopper 9, the plastic raw material dropped from the hopper 8 is extruded into the cylinder 6 Is melted into the mixed feed cylinder (4) through the feed pipe (6-5), and the iron powder into the mixed feed cylinder (4) through the feed pipe (9-2) of the iron powder hopper (9) When injected, the plastic and iron powder are mixed, kneaded and kneaded by the equally spaced screws (4-1) and then injected into the injection plunger body (1) while being heated to a temperature suitable for injection, and then injected into the product mold (3) by a piston. To form the balance product.

Therefore, according to the present invention, when the plastic raw material and the iron powder raw material are put into the hoppers 8 and 9 and the supply amount thereof (200 mesh to 5 to 25% by weight, 75 to 95% by weight of the iron powder) is extruded, mixed and melted Through the injection process, the balanced product is produced continuously and consistently. In addition, even if the device of the present invention is configured as in the separate embodiment of FIG. 2 and another separate embodiment of FIG.

As described above, the present invention is able to continuously and continuously perform the addition, extrusion, mixing transfer and injection of raw materials in molding a balance product by mixing a large amount of iron powder (75 to 95: 5 to 25 wt%) with plastic raw materials. As a result, the quality of the product and the significant cost reduction can be expected.

Claims (3)

The product mold (3) is installed in front of the nozzle (1-2) formed at the front end of the injection plunger body (1), and the hydraulic (pneumatic) cylinder (or injection submotor) (2) connected to the plunger piston rod is installed at the rear end. In the upper portion of the front side is provided with the inlet (1-4), the heater (4-4) is attached to the main wall installed in the vertical direction to the inlet (1-4) is rotated by the low-speed motor (5) A discharge port 4-3 of the mixed feed cylinder 4, to which the equal interval screw 4-1 is tolerated, is connected, and an inlet 6-3 formed in the upper part of the mixed feed cylinder 4 has a heater (on the main surface). The transfer pipe 6-5 connected with the plastic extrusion cylinder 6 with 6-6) attached and the transfer pipe 9-2 connected with the iron powder hopper 9 with the heater 9-3 attached to the main surface thereof. The extruded cylinder 6 is connected in a horizontal direction, but the hydraulic (pneumatic) cylinder (or injection sub) is installed in the rod of the equally spaced screws 6-1 installed therein. Emitter) (7) is set up and its upper side, the feed rate control port (8-1) having a plastic material hopper (injection molding apparatus of 8) the balance of iron products sense mixed in a plastic raw material, it characterized to be installed with. The inlet of the injection plunger body 1 is connected to the inlet of the mixing cylinder 104 is connected to the inlet of the mixing cylinder 104 is connected to the inlet of the mixing conveying cylinder 104 in the horizontal direction. An injection molding apparatus for a balance product in which iron powder is mixed with a plastic raw material, characterized in that the lower outlet of the mixed raw material hopper 106 in which the plastic raw material and the iron powder are mixed is connected. The inlet formed in the front upper surface of the injection plunger body 201 is connected to the outlet of the mixed feed cylinder 204 installed in the vertical direction, the mixed material extrusion cylinder is formed in the inlet formed in the upper portion of the mixed feed cylinder 204 An injection molding apparatus for a balance product in which iron powder is mixed with a plastic raw material, characterized in that a transfer pipe (206-3) is connected via a heating heater (206-2) installed at a lower end of the (206).