KR920004579Y1 - Cutting device for gate - Google Patents

Abstract

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Description

Gate automatic cutting device of injection mold

1 is a cross-sectional view showing a state in which the injection mold applied to the present invention is closed.

Figure 2 is a cross-sectional view of the injection mold applied to the present invention at the same time open state.

* Explanation of symbols for main parts of the drawings

1: injection mold 10: upper plate

11: sprue bush 12: sprue

13 support block 20 lower plate

21: runner lock pin 22: extrusion pin

23: guide pin 30: cylinder means

31: piston rod 32: cam member

33: part 34: slide core

35: cam guide 36: receiving hole

40: injection molded product 41: gate

42: runner

The present invention relates to a gate cutting device of an injection mold, and in particular, an injection mold in which a gate formed between an injection molded product and a runner is attached to a cylinder means in which a cam member is fixed to a lower plate so that the lower die is automatically cut as the lower die is moved. And a gate automatic cutting device.

In general, a gate is formed between an injection molding and a runner while injecting a resin into a mold for injection molding a large injection molded product such as a panel of a washing machine and a bumper of an automobile, and the operator had to cut the gate in a separate process.

In other words, in order to produce the finished injection molded product, the injection molded product must be taken out from the injection mold, and the gate must be cut, so that a separate process and a separate worker are required, thereby increasing production cost and decreasing productivity.

In addition, there are a variety of problems such as scratches may occur during gate cutting, such that the quality of the injection molded product is lowered.

The present invention has been made in view of the above-described various problems, and an object of the present invention is to install a cylinder means having a cam member fixed to the lower plate, so that when the lower plate is moved, that is, when the mold is opened, the cylinder means is activated and slides in conjunction with The core is also moved to easily and automatically cut the gate formed between the injection molded product and the runner, so that a separate process of cutting the gate and a separate worker are not required, which reduces production costs and improves productivity by reducing work time. The present invention provides a gate magnet cutting device of an injection mold.

In order to achieve the above object, the gate automatic cutting device of the injection mold according to the present invention, the cylinder means provided with a piston rod is installed on the lower die plate and is reversed when the injection mold is opened and advanced when the injection mold is closed, and The cam member is fixed to the end of the piston rod disposed in the cylinder means and moves up and down under interlock with the piston rod and has a tapered portion thereon, and a receiving hole is formed to accommodate the cam member. When the cam member is moved and the cam member is separated, the slide plate is moved in the opposite direction to the lower plate to cut the gate, and when the injection mold is opened because the slide mold is opened, the extrusion plate is raised to run the runner from the slide core. The injection mold is opened by the runner lock plate Is pushing the piston rod of the right cylinder means to move the slide core bottom mold plate in the opposite direction characterized in that the easily cut the gate.

According to this configuration, when the injection mold is opened after the resin is injected into the injection mold, the piston rod of the cylinder means is reversed, and the cam member fixed to the piston rod is retracted in conjunction with this, so that the slide core is opposite to the lower plate. The runner and the injection molded product are easily separated because the gate is cut, and the runner formed on the slide core is easily separated from the slide core as the extrusion pin is raised, so that a separate process and an operator are not required to cut the gate. .

As a result, production costs can be reduced and productivity can be improved, and the gate can be cut with a constant force, thereby improving the quality of the injection molded product.

Hereinafter, one example of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a state in which an injection mold applied to the present invention is closed, and FIG. 2 is a cross-sectional view showing an open state of a mold applied to the present invention.

In FIGS. 1 to 2, reference numeral 1 denotes an injection mold, which is composed of an upper mold plate 10 and a lower mold plate 20, and an injection-molded product between the mold plate 10 and the lower mold plate 2. 40) is injection molded.

Moreover, the sprue bush 11 is arrange | positioned at the said upper plate 10, The sprue 12 which supplies a resin melt agent to the runner 42 which is a main path of a high temperature resin melt material is arrange | positioned at the lower end part.

In addition, the support block 13 is disposed on one side surface of the upper plate 10 to support the cam member 32 to be described later so that the slide core 14 is positioned in place.

On the other hand, in the figure (20) is a lower die plate on one side as the lower die plate 20 is moved in the lower direction when the upper die plate 10 and the lower die plate 20 is separated that is the injection mold (1) is opened In this case, the piston rod 31 is moved forward when the upper die plate 10 and the lower die plate 20 are engaged, that is, when the injection mold 1 is closed as the lower die plate 20 is moved upward. The cylinder means 30 is installed.

Moreover, the cam part 32 in which the tape part 33 was formed in the upper part is fixed to the edge part of the piston rod 31 arrange | positioned at the said cylinder means 30.

In addition, a slide core 34 having a receiving hole 36 for accommodating the taper portion 33 of the cam member 32 is disposed on the upper surface of the lower die plate 20.

That is, when the cam member 32 is accommodated in the receiving hole 36 of the slide core 34, the slide core 34 is lowered by the tapered portion 33 of the cam member 32. 20, the cam member 32 is moved away from the receiving hole 36 of the slide core 34 by the tapered portion 33 of the cam portion 32, the slide core (34) ) Is moved in the opposite direction of the lower plate 20.

In addition, a runner lock pin 21 is disposed in a part of the slide core 34, and when the slide core 34 is moved, the slide core 34 moves along the guide piece 23 embedded in the lower plate 20. When the injection mold 1 is opened, the eject bottom pin (not shown) lifts the compression pin 22 to separate the runner 42 formed on the slide core 34 from the slide core 34.

The present invention configured as described above, after injection molding the injection molded product 40 by injecting a high-temperature resin melt into the injection mold 1 through the sprue bush 11 in the state that the injection mold (1) is closed, The lower mold plate 20 is moved downward to open the injection mold 1.

At this time, the piston rod 31 of the cylinder means 30 provided in the lower mold 20 is reversed so that the cam member 32 is separated from the receiving hole 36 of the slice core 34, and the slide core 34 is removed. Is moved in the opposite direction to the lower plate 20 so that the sheet 41 formed between the injection molded article 40 and the runner 42 is easily cut.

In addition, an eject bottom pin, not shown, lifts the extrusion pin 22 to separate the runner 42 from the top of the slide core 34.

That is, as the injection mold 1 is opened, the gate 41 may be cut and the runner 42 may be separated from the injection mold 1 to improve productivity.

As described above, according to the gating automatic cutting device of the injection mold of the present invention, as the lower die is moved, that is, the injection mold is opened, the cylinder means installed on the lower die has the piston rod reversed and the slide core has the lower die. Moved in the opposite direction to easily cut the gate formed between the injection molded product and the runner so that no separate process and operator according to the cutting is required.

That is, the cutting process and the number of workers can be reduced to reduce the production cost and improve the productivity, as well as to improve the quality of the injection molded product by cutting the gate with a constant force.

Claims (2)

Installed in the lower die plate 20, when the injection mold (1) is opened, the retracted means 30, the piston rod 31, which is advanced when the injection mold (1) is closed, and disposed in the cylinder means (30) It is fixed to the end of the piston rod 31, the cam member 32 and the upper and lower movement in conjunction with the piston rod 31, the tapered portion 33 is formed on the upper portion and the receiving hole so that the cam member 32 is accommodated When the cam member 32 is accommodated so that the cam member 32 is formed, the cam member 32 is moved toward the lower die plate 20. ) And the extrusion core 22 is raised when the injection mold 1 is opened by the slide core 34 cutting the slide core 34 and the slide core 34, and the runner 42 is separated from the slide core 34. The city consists of a runner lock pin 21, so that the piece of the cylinder means 30 when the injection mold 1 is opened. Gate tone cutting device of the injection mold, characterized in that the ton rod 31 is reversed to move the slide core (34) in the opposite direction to the lower plate 20 to easily cut the gate (41). The gate automatic cutting device of claim 1, wherein the runner lock coffin (21) is moved along with the guide pin (23) when the slide core (34) is moved.