KR101442116B1 - ejector for vertical insert injectoin molding machine - Google Patents

Abstract

The present invention relates to an ejector for a vertical injection molding apparatus. In particular, an ejector cylinder is installed inside a shape cylinder. Therefore, a lower space can be efficiently utilized; a molded product can be extracted more stably. The ejector includes: a base (110); an operating platen (12); a plurality of tie bars (130); the shape cylinder (140); a shape piston (150); the ejector cylinder (160); an ejector piston (170); an ejector connection bar (180); a plurality of ejector pins (190); a potentiometer (200); and a plurality of guide bars (210).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vertical injection molding machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for ejecting a vertical injection molding machine, and more particularly to a method of ejecting a molded product through an eject pin projecting from an upper surface of a base.

Generally, a vertical injection inserting machine (VERTICAL INSERT INJECTOR MOLDING MACHINE) is equipped with a mold part to mold a mold to produce a product, and an injection device to inject the molding material into the mold.

The mold-shaped portion includes a movable platen and a stationary platen, a tie bar, a mold-shaped cylinder, and an ejector for taking out a molded product and the like for incorporating and separating the mold.

The injection apparatus includes a hopper as a raw material storage container, a barrel for heating and weighing the raw material, a nozzle for spraying the raw material, and an injection cylinder for advancing the screw.

The present invention relates to an ejection apparatus which is one of the shaped portions of a vertical injection molding machine.

Conventionally, in a vertical injection molding machine, two hydraulic cylinders are installed at left and right ends of a base, and hydraulic cylinders are fixed by using a connecting bar, and eject pins are provided at the center and left and right sides of the connecting bar.

However, in the conventional ejection apparatus of the vertical injection molding machine, the durability of the hydraulic cylinder is lowered due to the tilting phenomenon of the two hydraulic cylinders, and the connecting bar is deformed and damaged.

However, since the height from the ground to the base is increased in order to secure the space for installing the hydraulic cylinder, there is a disadvantage that the space utilization can not be minimized.

The following Patent Document 1 discloses a take-out apparatus for a worm-throw injection mold, and Patent Document 2 below discloses a take-out apparatus for a molded product.

Patent Document 1 is a method of raising a take-out plate and an eject pin through a spur gear and a spindle connected thereto.

Patent Document 2 discloses that the movable platen can be retracted and separated from the molded product before pushing the molded product to the eject pin in such a manner that the two hydraulic cylinders are broken.

1. Korean Patent Publication No. 10-2011-0108939 (published on October 6, 2011) 2. Korean Patent Publication No. 10-1997-0073808 (published on Dec. 10, 1997)

Although the above-described Patent Documents 1 and 2 are all capable of taking out the molded product from the mold, there is a problem that the structure is complicated or occupies a lot of space for mounting the ejection cylinder.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ejection apparatus for a vertical injection molding machine capable of taking out a molded product more stably without fear of deformation or damage of the component parts.

It is another object of the present invention to provide an apparatus for ejecting a vertical injection molding machine, which can minimize the space for installing the ejection cylinder under the base, thereby making it possible to utilize the space.

According to an aspect of the present invention, there is provided an ejection apparatus for a vertical injection molding machine, comprising: a base having a plurality of eject pin through-holes; A mold cylinder fixedly installed on a lower portion of the base; A mold-shaped piston provided inside the mold-clamping cylinder so as to be movable in a vertical direction; An ejection cylinder integrally provided in an upper portion of the mold-clamping cylinder; An ejection piston installed inside the ejection cylinder so as to be movable up and down; An ejection connection bar fixedly installed on the ejection piston; A plurality of eject pins fixedly mounted on the eject connection bar; A movable platen movably installed in a lower portion of the base in a vertical direction, the fixed platen being fixed to the movable platen; A potentiometer installed on an outer circumferential surface of the mold-clamping cylinder and connected to the ejection connecting bar; And a plurality of guide bars installed between the base and the mold-clamping cylinder to penetrate the ejection connection bar.

In the apparatus for ejecting a vertical injection molding machine according to the present invention, an upper cover is provided at the upper end of the ejection cylinder, a lower cover is provided at the lower end, a rising channel connected to the lower end of the ejection cylinder, And a downflow channel connected to the inner upper end of the cylinder is provided.

The ejection apparatus of the vertical injection molding machine according to the present invention is characterized in that the ejection piston is composed of a rod and a head integrally provided at a lower portion thereof, the upper end of the rod penetrates through the ejection cylinder upper cover, And a bracket is installed.

According to the ejection apparatus of the vertical injection molding machine according to the present invention, since the ejection cylinder is installed inside the mold cylinder, a separate mounting space is not required under the base.

Therefore, space utilization can be promoted by efficient installation of the ejection cylinder.

According to the ejection apparatus of the vertical injection molding machine according to the present invention, the piping process for supplying the hydraulic fluid to the eject cylinder and the mold cylinder can be facilitated and the potentiometer for controlling the elevation of the eject pin can be easily installed.

According to the apparatus for ejecting a vertical injection molding machine according to the present invention, it is possible to easily manufacture a small number of component parts, thereby reducing the cost.

According to the ejection apparatus of the vertical injection molding machine according to the present invention, the molded product can be taken out quickly by stable operation, and productivity can be improved.

Further, there is no fear of failure of each component including the ejection connection bar, and repair and maintenance can be facilitated.

1 is a partially cut-away front view of an ejection apparatus of a vertical injection molding machine according to a preferred embodiment of the present invention.
FIG. 2 is a plan view of the main part of the ejection apparatus of the vertical injection molding machine according to the embodiment,
3 is a sectional view taken along the line AA in Fig. 2,
Fig. 4 is a sectional view taken along line BB of Fig. 2,
5 is a plan view of an ejection connection bar of the ejection apparatus of the vertical injection molding machine according to the embodiment,
6 is a partial cutaway front view of the elevation of the ejection piston of the ejection apparatus of the vertical injection molding machine according to the embodiment.

Hereinafter, an apparatus for ejecting a vertical injection molding machine according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the following, the terms "upward", "downward", "forward" and "rearward" and other directional terms are defined with reference to the states shown in the drawings.

1 is a partially cut-away front view of an apparatus for ejecting a vertical injection molding machine according to a preferred embodiment of the present invention.

1, an apparatus 100 of a vertical injection molding machine according to a preferred embodiment of the present invention includes a base 110, a movable plate 120, a plurality of tie bars 130, A mold cylinder 140, a molded body piston 150, an eject cylinder 160, an eject piston 170, an ejection connecting bar 180, and a plurality of eject pins 190.

The base 110 is fixed to the main frame of the injection molding machine, and the mold is mounted on the upper surface.

A plurality of eject pin passing holes 111 are formed in the base 110.

The movable platen 120 is installed at a lower portion of the base 110 so as to be movable up and down.

The plurality of tie bars 130 are for connecting the movable platen 120 under the base 110 with the fixed platen (not shown) on the base 110 and are formed to penetrate the base 110 do.

Each of the tie bars 130 has a lower end fixed to the movable platen 120 and an upper end fixed to the fixed platen.

The mold cylinder 140 is fixed to the lower portion of the base 110.

The mold clamping piston (150) is installed in the mold clamping cylinder (140) so as to be vertically movable.

The mold body 150 is provided at an upper center portion thereof with a recessed space 151 for accommodating an ejection cylinder 160 to be described later.

The lower end of the shaped piston 150 is fixed to the movable platen 120.

The ejection cylinder 160 is integrally provided in the upper part of the inside of the mold-clamping cylinder 140.

That is, the ejection cylinder 160 is positioned inside the mold-clamping cylinder 140.

FIG. 2 is a plan view of a main portion of an ejection apparatus of a vertical injection molding machine according to the embodiment, FIG. 3 is a sectional view taken along line A-A of FIG. 2, and FIG. 4 is a sectional view taken along line B-B of FIG.

3 and 4, an upper cover 161 is installed at an upper end of the eject cylinder 160, and a lower cover 162 is installed at a lower end.

The partition wall of the ejection cylinder 160 is provided with a lift passage 163 connected to the lower end of the ejection cylinder 160 and a descending passage 164 connected to the upper end of the ejection cylinder 160.

In the illustrated embodiment, the upflow channel 163 is formed in a vertical direction, and the downflow channel 164 is formed in a horizontal direction.

The ejection piston 170 is installed inside the ejection cylinder 160 so as to be movable up and down.

The ejection piston 170 includes a rod 171 and a head 172 integrally formed at a lower portion thereof so that the upper end of the rod 171 passes through the ejection cylinder upper cover 161.

The ejection connection bar 180 is fixed to the upper end of the rod 171 of the ejection piston 170.

A potentiometer connection bracket 181 is provided on the front right side of the eject connection bar 180.

5 is a plan view of an ejection connection bar of the ejection apparatus of the vertical injection molding machine according to the embodiment.

The plurality of eject pins 190 are fixed to the upper ends of the eject connection bars 180 and inserted into the respective eject pin passing holes 111 of the base 110.

A potentiometer (200) connected to the ejection coupling bar (180) is fixed to the outer circumferential surface of the mold cylinder (140).

Between the base 110 and the mold clamping cylinder 140, a plurality of guide bars 210 passing through the ejection connecting bar 180 are installed.

Each of the guide bars 210 supports the upward and downward movement of the ejection coupling bar 180.

Fig. 6 is a partially cut-away front view of the elevation of the ejection piston of the ejection apparatus of the vertical injection molding machine according to the embodiment.

The operation of the ejection apparatus 100 of the vertical injection molding machine according to the preferred embodiment of the present invention will be described with reference to FIGS. 1 and 6. FIG.

The ejection piston 160, the ejection connecting bar 180, and the eject pin 190 are kept in a lowered state during the process of forming the product.

Therefore, the eject pin 190 does not protrude from the upper surface of the base 110 as shown in FIG.

6, the ejection piston 170 and the ejection connecting bar 180 and the ejection pin 190 fixed to the ejection piston 170 are set to the setting positions of the ejection pins 190, Stroke.

The eject pin 190 protrudes from the upper surface of the base 110 to push up the molded product.

The ejection piston 170 and the ejection connecting bar 180 and the ejection pin 190 are lowered by the set stroke when the molded product is pulled out and then the hydraulic pressure is supplied to the downflow channel 164 of the ejection cylinder 160.

In the descending process, the ejection pin 190 is housed in the base 110 as shown in FIG.

On the other hand, the potentiometer 200 controls the raising and lowering of the eject piston 170 and the ejection connecting bar 180 and the eject pin 190 interlocking therewith.

That is, when the ejection piston 170, the ejection connecting bar 180, and the ejection pin 190 are moved up by the set stroke, the potentiometer 200 connected to the ejection connection bar 180 is rotated To stop their elevation.

When the ejection piston 170, the ejection connecting bar 180, and the ejection pin 190 are lowered by a predetermined stroke, the potentiometer 200 cuts off the hydraulic pressure supplied to the downflow channel 164, do.

As described above, in the ejection apparatus 100 of the vertical injection molding machine according to the present invention, the ejection cylinder 160 is installed inside the mold cylinder 140.

Therefore, a separate mounting space is not required in the lower portion of the base 110, so that the space can be utilized.

Further, the ejecting apparatus 100 of the vertical injection molding machine according to the present invention can be easily manufactured with a small number of constituent parts, and the respective components including the ejection connecting bar 180 are not deformed or damaged.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

100: Ejection device 110: Base
120: Operation Platen 130: Tie Bar
140: shaped cylinder 150: shaped piston
160: Ejection cylinder 170: Ejection piston
180: ejection connecting bar 190: eject pin
200: Potentiometer

Claims (3)

A base 110 on which a plurality of eject pin passage holes 111 are formed;
A movable platen 120 movably installed in a lower portion of the base 110 in a vertical direction and fixed to the molded piston 150;
A plurality of tie bars 130 passing through the base 110 to connect the movable platen 120 under the base 110 and the fixed platen on the base 110;
A mold clamping cylinder 140 fixedly installed at a lower portion of the base 110;
A mold clamping piston 150 installed inside the mold clamping cylinder 140 so as to be movable up and down;
An eject cylinder 160 installed at a lower portion of the base 110;
An ejection piston 170 installed in the ejection cylinder 160 so as to be movable up and down;
An eject connection bar 180 fixed to the eject piston 170;
A plurality of eject pins 190 fixed to the eject connection bar 180 and inserted into the eject pin passage hole 111;
A potentiometer 200 installed on an outer circumferential surface of the mold-clamping cylinder 140 and connected to the ejection connecting bar 180;
And a plurality of guide bars 210 installed between the base 110 and the mold cylinder 140 through the ejection coupling bar 180. In this apparatus,
An ejection cylinder 160 is integrally provided on the upper portion of the mold-clamping cylinder 140,
An upper cover 161 and a lower cover 162 are installed at upper and lower ends of the eject cylinder 160,
A rising channel 163 connected to the lower end of the ejection cylinder 160 and a lower channel 164 connected to the upper end of the ejection cylinder 160 are provided on the partition wall of the ejection cylinder 160. An ejection device of an injection molding machine.
delete The method according to claim 1,
The ejection piston 170 is composed of a rod 171 and a head 172 integrally provided at a lower portion of the rod 171. The upper end of the rod 171 passes through the ejection cylinder upper cover 161, 180,
Wherein the ejection connection bar (180) is connected to the potentiometer (200) through a potentiometer connection bracket (181).

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