KR200366282Y1 - Many Colors Multiple Injection Molding Machine - Google Patents

Abstract

The present invention relates to a multi-color multi-color injection molding machine, the measuring cylinder 150 and the measuring cylinder 150 rotatably provided therein the rotating shaft 154, the screw blade 156 is formed for transferring the injection liquid to the outer peripheral surface, In the multi-color multi-color injection machine consisting of an injection cylinder 130 for injecting the injection liquid supplied from the injection by the moving piston 134, the gas supply source 170 for supplying gas to the injection cylinder 130 is connected, Valve means 174 is provided between the gas supply source 170 and the injection cylinder 130 to prevent the back flow to the gas supply source 170, to prevent the mixing of the injection liquid to minimize the defective rate of the product It becomes possible.

Description

Many Colors Multiple Injection Molding Machine

The present invention relates to a multi-color multi-color injection molding machine, and more particularly, to a multi-color multi-color injection molding machine that absorbs the impact of the injection cylinder and discharges all the injection liquid remaining in the injection cylinder.

In general, the injection molding machine is operated by hydraulic pressure, and the raw material of the plastic resin is injected by mixing and stirring through the hopper of one side.

Among these injection molding machines, there are multicolor injection molding machines for producing products of various colors. The multicolor injection molding machine includes one injection cylinder and a plurality of measurement cylinders in which various kinds of colors are built.

Therefore, the injection liquid in each metering cylinder is injected only through the injection cylinder.

However, such a conventional multi-color multi-color injection molding machine, because the injection liquid of various colors built into each weighing cylinder is injected into the mold through only one injection cylinder, when some injection liquid remains in the injection cylinder, the other supplied later It is mixed with the injection color of the color, thereby causing a problem that the injection of the mixed color is injected to obtain a molded product of the desired color.

Accordingly, the present invention was devised to solve the problems of the prior art as described above, by supplying gas into the injection cylinder after injection and re-injecting to discharge all the injection liquid remaining in the injection cylinder to prevent mixing of the injection liquid By doing so, the object of the present invention is to provide a multicolor injection molding machine with a minimum defect rate.

Another object of the present invention is to provide an injection cylinder with a multi-color injection molding machine for preventing damage to the injection cylinder by providing an elastic means for preventing an impact.

1 is an enlarged view illustrating a multi-color multi-color injection molding machine according to the present invention.

2 is an operation state diagram of a multi-color multi-component injection machine according to the present invention, (a) is a view showing a state in which the injection liquid is supplied into the injection cylinder, (b) is a state in which the piston of the injection cylinder is advanced and injected (C) is a view showing a state in which the piston is fully advanced to contact the piston head, (d) is a view showing a state in which the piston and the injection portion is backward, (e) is a gas into the injection cylinder Is a view showing a state in which is supplied, (f) is a view showing a state in which the piston advances again.

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

100: injection molding machine 110: mold part

112: mold 120: injection part

130: injection cylinder 132: injection hole

134: piston 134a, 134b: groove

136: O-ring 138: compression spring

140: piston head 150: metering cylinder

152: euro 154: rotation axis

156: screw wing 160: control cylinder

162: piston 170: gas supply source

172: connector 174: valve means

G: spacing

The present invention for achieving the above object is a metering cylinder rotatably provided therein a rotating shaft formed with a screw blade for transporting the injection liquid to the outer peripheral surface, and the injection liquid supplied from the metering cylinder to the moving piston In the multi-color multi-color injection molding machine consisting of an injection cylinder which is injected by the injection, the gas supply source for supplying gas to the injection cylinder is connected, between the gas supply source and the injection cylinder is provided with a valve means for preventing backflow to the gas supply source Multi-color multi-purpose injection machine.

Preferably, the valve means is composed of a check valve or a solenoid valve.

Also preferably, the piston of the injection cylinder, O ring is provided on the outer peripheral surface for airtight and watertight maintenance; A piston head installed on one surface of the piston to maintain a predetermined distance from the piston and formed in a shape corresponding to the injection hole of the cylinder and inserted into the injection hole; It is configured to include; elastic means that is installed between the piston head and the piston is buffered.

Also preferably, the elastic means, both ends of the piston head and the compression spring is fixed to the piston, respectively.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention in detail as follows.

1 and 2 are views showing a multi-color multi-type injection machine according to the present invention.

As shown in FIG. 1, the injection machine 100 of the present invention is largely divided into a mold part 110 and an injection part 120.

The mold part 110 is provided with a mold 112 on a surface facing the injection part 120, the metering cylinder 150 and the injection cylinder 130 is installed in the injection part 120.

A plurality of metering cylinders 150 are installed in the injection part 120, and a rotating shaft 154 is rotatably installed therein, and a screw for transferring the molten injection liquid to the outer circumferential surface of the rotating shaft 154. Wings 156 are formed.

Therefore, the screw blade 156 is moved while being mixed with the rotational force is added to the injection liquid.

In addition, the rotary shaft 154 of the tip of the screw blade 156 is formed in a conical shape, a plurality of holes are drilled in the same direction as the axial direction of the rotary shaft 154, although not shown on the outer peripheral surface to discharge the injection liquid .

In addition, the injection cylinder 130 communicated with the metering cylinder 150 and the flow path 152 has an injection hole 132 whose diameter is gradually reduced in its inner end portion.

In addition, the piston 134 is provided in the injection cylinder 130 to be accessible, the piston 134 is in contact with the inner circumferential surface of the injection cylinder 130 in the groove 134a of the outer peripheral surface to maintain airtightness and water tightness O-ring 136 is installed, the piston head 134 is formed in the shape corresponding to the injection hole 132 of the cylinder 130, the piston head 140 is inserted into the injection hole 132 is installed do.

The piston head 140 is installed to maintain a predetermined distance (G) with the front surface of the piston 134, preferably not shown, but one side of the piston head 140 opposite the piston 134, the piston 134 It is preferred that the rod member protrudingly inserted into and guided in the protrusion).

In addition, an elastic means for cushioning is installed between the piston head 140 and the piston 134.

The elastic means is composed of a compression spring 138, the compression spring 138, both ends of which are respectively fixed to the piston head 140 and the groove 134b of the piston 134.

On the other hand, a gas supply source 170 for supplying gas into the injection cylinder 130 is connected to the front end of the injection cylinder 130 via a connecting pipe 172, the gas supply source 170 and the injection cylinder 130 On the connecting pipe 172 therebetween is provided with a valve means 174 to prevent the back flow to the gas supply source 170 side.

The valve means 174 is composed of a check valve or a solenoid valve, the gas supplied from the gas supply source 170 into the injection cylinder 130 is preferably provided with nitrogen gas.

In addition, the injection cylinder 130 adjacent to the flow path 152 is provided with a control cylinder 160 for controlling the injection liquid supplied from the metering cylinder 150, and the flow path 152 is provided in the control cylinder 160. A piston 162 for opening and closing is installed to be accessible.

Here, although not shown, the injection machine 100 is operated and controlled by the control unit.

Hereinafter, the operation of the multi-color multi-color injection machine according to the present invention configured as described above.

First, when the injection molding machine 100 is operated, the injection part 120 is moved to the mold part 110 side and positioned adjacently.

When the color of the injection liquid to be injected through the control unit is selected, the control cylinder 160 on the side of the metering cylinder 150 in which the injection liquid is stored is operated to move the piston 162 into the cylinder 160. The flow path 152 is secured as it is drawn in.

Thereafter, the rotating shaft 154 in the metering cylinder 150 having the passage 152 is rotated, and the injection liquid in the cylinder 150 is transferred to the passage 152 by the screw blades 156 of the rotating shaft 154. The discharged and discharged injection liquid is supplied into the injection cylinder 130.

When the injection liquid is supplied into the injection cylinder 130, the piston 162 of the control cylinder 160 which has been introduced is drawn out to block the flow path 152 and then the piston 134 in the injection cylinder 130. ) Advances the injection liquid into the mold 112 through the injection hole (132).

At this time, the injection is completed as the piston head 140 of the piston 134 is inserted into the injection hole 132, the compression spring 138 between the piston 134 and the piston head 140 is the groove of the piston 134 The shock is applied to the piston 134 and the cylinder 130 by absorbing the buffer 134b while being inserted into the 134b.

Thereafter, the piston 134 is retracted and returned to its original state while the injection part 120 is separated from the mold part 110 and spaced apart.

In the above state, the nitrogen gas in the gas supply source 170 is supplied into the injection cylinder 130 at high speed and high pressure through the connecting pipe 172 by the control unit. At this time, the valve means 174 is in an open state.

Then, after the gas is supplied, the connecting pipe 172 is blocked through the valve means 174, and then the piston 134 is operated to discharge all the injection liquid remaining in the injection cylinder 130, thereby causing mixed color injection. prevent.

As described above, according to the multi-color multi-color injection molding machine of the present invention, by discharging all the injection liquid remaining in the injection cylinder has the effect of minimizing the defective rate of the product by preventing the mixing of the injection liquid.

In addition, there is an effect of preventing the damage to the injection cylinder and the piston by absorbing the shock that may be generated during the operation of the piston of the injection cylinder by the buffering action of the elastic means.

Claims (4)

A metering cylinder 150 rotatably provided therein with a rotating shaft 154 having a screw blade 156 for conveying the injection liquid on an outer circumferential surface thereof, and a piston for moving the injection liquid supplied from the metering cylinder 150. In the multi-color multi-color injection molding machine consisting of an injection cylinder 130 that is injected by 134, A gas supply source 170 for supplying gas to the injection cylinder 130 is connected, and a valve means 174 for preventing backflow to the gas supply source 170 between the gas supply source 170 and the injection cylinder 130 is provided. Multi-color multi-color injection molding machine characterized in that provided. The method of claim 1, The valve means (174), multi-color multi-component injection machine, characterized in that consisting of a check valve or a solenoid valve. The method according to claim 1 or 2, The piston 134 of the injection cylinder 130, the O-ring 136 is installed on the outer peripheral surface for airtight and watertight maintenance; The piston 134 is installed on one surface of the piston 134 to maintain a predetermined interval (G), and formed into a shape corresponding to the injection hole 132 of the cylinder 130 is inserted into the injection hole 132 Head 140; Multicolored multi-type injection molding machine comprising a; elastic means which is installed between the piston head 140 and the piston 134 is buffered. The method of claim 3, wherein The elastic means, both ends of the multi-color injection molding machine, characterized in that the compression head 138 is fixed to the piston head 140 and the piston 134, respectively.