KR101591980B1 - Method and apparatus gate auto cutting, and molding apparatus using it - Google Patents

Abstract

The present invention relates to a gate automatic cutting apparatus and a mold using the automatic gate cutting apparatus. More particularly, the present invention relates to a gate automatic cutting apparatus and a mold using the automatic gate cutting apparatus, wherein the gate is cut off from the mold without being manually cut.
In the automatic gate cutting apparatus 1000 according to the present invention, the air cylinder rod 1110 is operated in one direction by the air supplied to the one-way valve, and the air cylinder rod is moved in the other direction The air cylinders 1100 are provided so as to be rotatable in one direction with respect to the hinge point S by one-directional operation of the air cylinder rod, and in addition, by operating in the other direction of the air cylinder rod, And the gates 2100, 2110, and 2120 provided at the other end of the seesaw bar are rotated and pressed in one direction before solidifying the gates 2100, 2110, and 2120 provided in the mold, The gate is cut in the mold by cutting off the gate, and the seesaw is rotated in the other direction, It characterized in that it comprises a gate cutter unit 1300 consisting of phase.

Description

TECHNICAL FIELD [0001] The present invention relates to a gate automatic cutting apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate cutting apparatus for a metal mold, and more particularly, to a gate automatic cutting apparatus and a mold using the same, which are manufactured by cutting a gate without cutting the gate manually.

In general, injection molding is a technique in which a cavity, which is a space part of a predetermined shape to be formed, is formed in a mold, and a synthetic resin is heated in the cavity at a temperature higher than a melting point to pressurize the molten synthetic resin at a high pressure, The molten synthetic resin is melted through a high temperature cylinder and is injected from a nozzle of an injection machine and introduced into a sprue of a mold and introduced into a runner and then supplied to a runner through a plurality of gates formed in the runner, Shaped moldings into the respective cavities for molding and solidify them.

In general, the upper and lower molds are separated from each other, and then discharged from the mold by the action of the ejector mounted on the lower mold. The molded product is discharged with the gate, the runner, do.

At this time, the operator cuts the gate and separates the molding from the runner and the sprue, thereby completing the production of the molding.

However, in the above process, the gate cutting operation for separating the molded article from the runner and the sprue is performed by hand or cutting using a knife according to the thickness of the gate, which is troublesome and the operator simultaneously performs the injection operation and the side gate cutting operation It is necessary to do so, and it causes overwork.

In order to improve this, a robot arm is installed to remove sprue and runner from the lower mold.

The robot arm is located at the upper part of the injection mold, and when the lower mold is deployed, the robot arm descends to the sprue and runner position, and the sprue and runner are removed.

However, when the robot arm is used, the removal work of the sprue and runner is not so delicate as that of a person, so that a part of the runner is not completely removed from the mold and remains. In such a case, There is a problem that it damages the expensive mold cavity depending on the position.

Further, since the robot arm is operated only after the lower mold is opened, the injection process time is lengthened by the working process time of the robot arm, and the production amount is eventually lowered.

In order to solve such a problem, an injection mold having an automatic cut-off structure of a side gate for automatically cutting a side gate portion connected to a runner and a sprue is provided in a cavity during injection molding. The injection mold disclosed in Korean Patent Registration No. 10-0645450 An injection mold having an automatic cut-off structure of a side gate and a double injection system using the same, which are known in the art, include a top mold to which a liquid master batch is injected, A middle plate mold rotatably provided with a plurality of molded cores for rotatably supporting driven gears formed on respective molded cores so as to be interlocked with each other and provided with drive gears coinciding with the driven gears on the outer periphery, The mutual relationship among the lower plate molds having the screw rods passed through the female screw Sum and the female screw is turned in the screw rod forward / backward by the expansion and by forming each core is rotated while the driven gear in agreement with the drive gear to the rotation of the female screw to be interlocked is a cut away side gate formed in the formed product side.

Therefore, it can be applied to the double injection system through the injection mold to maximize the productivity by shortening the injection process time and providing safety of sprue and runner removal.

However, since the sectional area of the gate is increased when the product is formed into a very large panel, the automatic cutting structure of Patent Registration No. 10-0645450 is difficult to automatically cut a gate having a very large sectional area, There was a problem not to.

Korean Patent Registration No. 10-0645450 entitled " Injection Mold with Automatic Cutting Structure of Side Gate and Double Injection System Using It ".

It is an object of the present invention to provide a gate automatic cutting apparatus and a mold using the gate automatic cutting apparatus, which are manufactured by cutting a gate without cutting the gate manually and taking it out. .

According to another aspect of the present invention, there is provided a method for automatically cutting a gate, comprising the steps of: sending a pressure-relieving completion signal to a sequence time controller connected to the periphery of an injection molding machine or an injection molding machine, A step of supplying air through a one-way valve of a solenoid valve unit installed in a mold in a controller or around a mold, and a step of supplying air to an air cylinder of each air cylinder provided in a mold by air supplied to a one- A step in which the seesaw bar rotatably installed by the operation of the air cylinder rod is rotated with respect to the hinge point by the operation of the air cylinder rod so that the gate cutter portion provided at the other end of the seesaw bar Each gate provided is pressurized before solidification The air cylinder rod is operated in the other direction by the air supplied to the other directional valve of the solenoid valve unit, and the step of operating in the other direction of the air cylinder rod And causing the seesaw bar to rotate with respect to the hinge point so that the gate cutter provided at the other end of the seesaw bar is released from each gate provided in the mold.

The automatic gate cutting apparatus according to the present invention is characterized in that the air cylinder rod is operated in one direction by the air supplied to the one-way valve and the air cylinder rod is operated by the air supplied to the other direction valve A seesaw bar provided inside the mold so as to be pivotable in one direction with respect to the hinge point by one-directional operation of the air cylinder rod and rotated in the other direction by operating in the other direction of the air cylinder rod, The gate is cut in the mold by cutting the gate in one direction by rotating the seesaw bar in one direction before the respective gates provided in the mold are solidified by being provided at the other end of the seesaw bar so as to rotate the seesaw in the other direction, A gate cutter portion having an end formed in a wedge shape It characterized in that it comprises.

Wherein the seesaw bar is longer than a length connected to the air cylinder rod at the hinge point and longer than a length connected to the gate cutter at a hinge point.

The hinge point is formed by a hinge block formed in the mold so that a seesaw bar hole is formed so that the seesaw bar is fitted and rotatably installed and a hinge hole formed in a direction perpendicular to the seesaw bar hole is formed, And is rotatable by a hinge pin inserted into the seesaw bar hole and a hinge pin inserted into the seesaw bar hinge hole formed in the seesaw bar.

The gate cutter portion includes a gate cutter fixing block fixed to the other end of the seesaw bar, and a gate cutter fixing block inserted into the gate cutter fixing block to cut the gate in the mold by cutting off the gate before solidifying the gate, And a gate cutter supporting block which is fastened to the gate cutter fixing block to prevent the gate cutter from coming off in the gate cutter fixing block.

On the other hand, the gate cutter portion is rotatably assembled to the other end of the seesaw bar so that the gate is cut off before the gate is solidified, so that the gate is cut in the mold and the seesaw bar is rotated in the other direction, And a gate cutter configured to cut the gate.

And the wedge-shaped end portion of the gate cutter portion is provided with a linear portion having a predetermined length parallel to the installation direction of the gate.

And a stopper installed to control the angle of rotation of the seesaw bar, wherein the stopper is fixed to one surface of the stopper, and the stopper is installed on the opposite side to the fixed end of the air cylinder, And an air cylinder mounting unit in which a seeside bar mounting groove is formed so that one end of the seesaw bar can be pivoted.

In addition, the mold of the present invention includes a solenoid valve unit that operates to supply air to the valve in a sequence time controller that receives a pressure holding completion signal when the pressure in the injection molding machine is completed, and a solenoid valve unit that operates by air supplied from the solenoid valve unit. And an automatic cutting device.

As described above, according to the automatic gate cutting apparatus and the mold using the automatic gate cutting apparatus according to the present invention, the shapes of various gates are cut off from the mold without being cut by hand, and are taken out.

FIG. 1 is a schematic view of an assembly state of a mold for explaining a gate automatic cutting apparatus according to an embodiment of the present invention,
FIG. 2 is an explanatory view showing a state where a gate is cut by the gate cutter of FIG. 1;
FIG. 3 is a schematic view of an assembly state of a mold for explaining a gate automatic cutting apparatus according to the second embodiment of the present invention,
4 is an explanatory view showing a state in which the gate is cut by the gate cutter of FIG. 3,
FIG. 5 is a schematic view of an assembly state of a mold for explaining a gate automatic cutting apparatus according to the third embodiment of the present invention,
FIG. 6 is a schematic view of an assembly state of a mold for explaining a gate automatic cutting apparatus according to a fourth embodiment of the present invention,
FIG. 7 is a schematic view illustrating an assembly state of a mold for explaining a gate automatic cutting apparatus according to a fifth embodiment of the present invention,
8 is a schematic view of an assembly state of a mold for explaining a gate automatic cutting apparatus according to a sixth embodiment of the present invention,
9 is an explanatory view showing the gate cutter of the present invention,
10 is a block explanatory view showing a gate automatic cutting method according to the present invention.

Hereinafter, a gate automatic cutting apparatus according to an embodiment of the present invention and a mold using the same will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals are given to the same elements even when they are shown in different drawings. In the drawings, the same reference numerals as used in the accompanying drawings are used to designate the same or similar elements. And detailed description of the configuration will be omitted. Also, directional terms such as "top", "bottom", "front", "back", "front", "forward", "rear", etc. are used in connection with the orientation of the disclosed drawing (s). Since the elements of the embodiments of the present invention can be positioned in various orientations, the directional terminology is used for illustrative purposes, not limitation.

1 and 2, a side gate side automatic gate cutting apparatus 1000 according to an embodiment of the present invention is constructed in such a manner that the air cylinder rod Directional operation of the air cylinder rod 1100 and the air cylinder rod 1110 are operated by the air supplied to the other directional valve in the other direction, (1200) provided inside the mold (2000) so as to be rotatable in one direction with respect to the base (S) and rotated in the other direction by operating in the other direction of the air cylinder rod, The respective gates 2100 connected to supply the resin through the runners 2300 to the cavities 2200 formed by the upper and lower cavity cores 2210 and 2220 fixed to the upper and lower plates in the mold 2000 are solidified Be The gate cutter 1300 is formed in a wedge shape so as to come out of the gate by rotating the seesaw bar in the other direction, .

Accordingly, when the seesaw bar 1200 is rotated by the operation of the air cylinder rod 1110 of the air cylinder 1100, the gate 2100 before the wedge-shaped end of the gate cutter 1300 is solidified, The gate is automatically cut inside the mold while blocking the gate.

The length of the seesaver 1200 connected to the air cylinder rod 1110 at the hinge point S is longer than the length connected to the gate cutter 1300 at a hinge point.

In this embodiment, the length of the seesaw bar 1200 connected to the air cylinder rod 1110 at the hinge point S is two times longer than the length connected to the gate cutter 1300 at the hinge point.

Therefore, even if the air cylinder 1100 is installed with a small capacity, the force transmitted from the air cylinder rod 1110 is doubled and transferred to the gate cutter portion 1300, and the gate is cut off. Therefore, an unnecessarily large air cylinder is purchased So that the manufacturing cost of the mold is reduced, and it is not necessary to make the mold unnecessarily large.

The hinge point S includes a hinge block 1400 provided inside the metal mold to form a hinge hole 1410 in which the seesaw bar 1200 is inserted and rotatably formed therein and a seesaw bar hinge 1410 formed in the seesaw bar 1200, Is rotatably installed by a hinge pin (1500) fitted into the hole (1210) and the hinge hole (1410).

When the air cylinder rod 1110 is advanced by the air supplied to the air cylinder 1100, the hinge pin 1500 turns to the hinge point S and the seesaw 1200 is rotated.

The gate cutter portion 1300 includes a gate cutter fixing block 1310 fixed to the other end of the seesaw 1200 and a gate cutter fixing block 1310 inserted into the gate cutter fixing block to cut off the gate before the gate 2100 is solidified. A gate cutter 1320 configured to cut out the gate cutter 1300 in the mold 2000 and to exit the gate by rotating the seesaver 1200 in the other direction; And a gate cutter supporting block 1330 fastened to the gate cutter fixing block.

And a gap retaining block 1340 sandwiched between the gate cutter fixing block 1310 and the gate cutter supporting block 1330 to closely contact the gate cutter 1320.

The gate cutter 1310 is not removed from the gate cutter fixing block 1310 by the gate cutter supporting block 1330 and the gate cutter fixing block 1310 is installed on the seesaw 1200, And a gap retaining block 1340 is provided between the gate cutter fixing block 1310 and the gate cutter supporting block 1330 to make it easier to assemble and replace the gate cutter 1320 .

A stopper 1600 is provided at a position where the air cylinder 1100 and the seesaver 1200 are connected to each other to adjust the rotation angle of the seesaw bar so that the gate cutter 1320 advances only to the position where the gate is cut accurately Lt; / RTI >

Therefore, the stopper 1600 advances only to the position where the gate cutter 1320 is correctly cut to the gate, so that the upper and lower cavity cores 2210 and 2220 are not damaged.

The air cylinder 1100 is fixed to one side of the air cylinder 1100. The stopper 1600 is provided on the opposite side of the air cylinder 1100 and the seesaw bar mounting groove And an air cylinder mounting unit 1700 in which an air cylinder mounting unit 1710 is formed.

One end of the seesaw bar 1200 is hinged to the air cylinder rod 1110 in the seesaw attachment groove 1710 formed in the air cylinder installation unit 1700 and is rotated at a predetermined angle with respect to the hinge point S .

2, the air cylinder rod 1110 of the air cylinder 1100 advances by the air supplied before the gate is solidified. At this time, while the seesaw bar 1200 is rotated, the gate cutter 1320 is rotated, The gate 2100 advances toward the gate 2100 to block the gate 2100, which is a passage through which the resin is supplied to the cavity 2200, so that the gate 2100 is cut inside the mold.

3 and 4 show a side gate overlay gate automatic cutting apparatus 1000 according to the second embodiment of the present invention. As compared with the first embodiment, the position of the gate cutter 1320 is There is only a difference in the degree to which the gate cutter 1320 cuts the gate 2110 and automatically cuts the gate inside the mold by moving slightly inward from the outer surface of the cavity 2200.

5 to 8 show a gate automatic cutting apparatus 1000 of a slide under gate 2120 according to the third to sixth embodiments of the present invention.

5, the automatic gate cutting apparatus 1000 for a slide under gate according to the third embodiment of the present invention includes the air cylinder 1100, the stopper 1600, and the air cylinder mounting unit 1700, Lt; / RTI >

The hinge point S is formed with a seesaw bar hole 1420 so that the seesaw bar 1200 is fitted and rotatable and a hinge hole 1410 formed in a direction perpendicular to the seesaw bar hole A hinge block 1400 formed inside the mold and a seesaver bar hinge hole 1410 formed in the hinge hole 1410 and the seesaw bar 1200 in a state where the seesaw bar 1200 is fitted in the seesaw bar hole 1420 1210) of the hinge pin (1500).

The gate cutter portion 1300 includes a gate cutter fixing block 1310 fixed to the other end of the seesaw 1200 by a bolt, and a gate cutter fixing block 1310 inserted into the gate cutter fixing block to block the gate before solidifying the gate 2120. [ A gate cutter 1320 configured to cut the gate in the mold 2000 and to exit the gate by rotating the seesaver 1200 in the other direction; And a gap maintaining block 1340 sandwiched between the gate cutter fixing block 1310 and the hinge block 1400 to closely contact the gate cutter 1320 so as to prevent the gate cutter 1320 from being damaged.

Therefore, the gap maintaining block 1340 is installed so that the gate cutter 1320 does not come off from the gate cutter fixing block 1310 and the gate cutter fixing block 1310 is installed on the seesaw 1200 so that the gate cutter 1320 And a gap retaining block 1340 is provided between the gate cutter fixing block 1310 and the gate cutter supporting block 1330 to make it easier to assemble and replace the gate cutter 1320 .

6, the air cylinder 1100 is fixed to the outer surface of the mold 200 in the third embodiment shown in FIG. 5, and the gate automatic cutting apparatus 1000 of the slide under gate according to the fourth embodiment of FIG. A difference in which the air cylinder rod 1111 is long and the stopper 1600 is fixed to the inside of the mold 2000 using the stopper mounting block 1610 without the air cylinder mounting unit 1700 have.

5, the gate cutter 1320 of the gate cutter 1300 is assembled to the other end of the seesaw 1200 by a hinge pin 1350 so as to be rotatable The gate is cut in the mold by blocking the gate before the gate 2120 is solidified, and is configured to come out of the gate by rotating the seesaver in the other direction.

In the sixth embodiment shown in FIG. 8, the gate cutter 1320 of the gate cutter 1300 in the fourth embodiment shown in FIG. 6 is configured as in the fifth embodiment shown in FIG.

Here, the lower cavity core 2220 shown in FIGS. 5 to 8 is assembled into a plurality of separate parts for processing in the structure of a mold, but it is needless to say that the lower cavity core 2220 can be further separated and integrated as necessary.

9 shows a state in which the wedge-shaped end of the gate cutter 1320 cutting the gate 2100 supplying resin to the cavity 2200 in the side gate side of FIGS. And a linear portion 1321 having a predetermined length is provided parallel to the installation direction.

When the gate cutter 1320 is moved while being in close contact with the gate 2100 formed in the upper and lower cavity cores 2210 and 2220 in the mold 2000 to form the wedge shaped end of the gate cutter 1320, 1321 from being easily broken.

As shown in FIGS. 1 to 10, the automatic gate cutting method according to the present invention includes a sequence time controller (not shown) connected to the periphery of an injection molding machine or an injection molding machine when the pressure in the injection molding machine 100 is completed, (S2) of supplying air to the solenoid valve unit (300) installed in the mold (2000) or the solenoid valve unit (300) around the mold in the sequence time controller, (S3) of operating the air cylinder rod 1110 of each air cylinder 1100 provided in the mold 2000 by the air supplied to the one-way valve of the solenoid valve unit in one direction, The seesaw bar 1200 installed to be rotatable about the hinge point S is rotated by the operation of the air cylinder rod 1110 so that the gate cutter portion (S4) of cutting the gate in the mold by pressing the gate (2100, 2110, 2120) provided in the mold (2000) before the solidification of the gate (2100, 2110, 2120) The air cylinder rod 1110 is operated in the other direction by the air supplied to the other directional valve of the air cylinder rod 1110 so that the seesaw 1200 is operated in the other direction of the air cylinder rod 1110, Includes the step S6 of causing the gate cutter 1320 of the gate cutter portion 1300 provided at the other end of the seesaw bar 1200 to exit from the respective gates provided in the metal mold while rotating around the point S do.

Therefore, the mold 2000 having the automatic gate cutting apparatus 1000 according to the present invention is configured such that when the pressure in the injection molding machine 100 is completed, the sequence time controller 200 receiving the pressure- The air cylinder 1100 of the air cylinder 1100 is operated and the air cylinder rod 1110 of the operating air cylinder 1100 pushes the seesaw bar 1200 so that the gate cutter 1320 of the gate cutter portion 1300 The gates 2100, 2110, and 2120 provided in the mold 2000 are pressed before being solidified to cut off the gate, thereby automatically cutting the gate in the mold.

The air cylinder rod 1110 is operated in the other direction by the air supplied to the other directional valve of the solenoid valve unit 300 so that the seesaw bar 1200 rotates with respect to the hinge point S, The gate cutter 1320 of the gate cutter portion 1300 provided at the other end of the gate cutter 1320 is released from each gate provided in the metal mold and becomes a standby state.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention if they are apparent to those skilled in the art.

S: Hinge point 100: Injection molding machine
200: Sequence time controller 300: Solenoid valve unit
1000: gate automatic cutting device 1100: air cylinder
1110: air cylinder rod 1200: seesoba
1210: Seesaw bar hinge hole 1300: Gate cutter part
1310: gate cutter fixing block 1320: gate cutter
1330: gate cutter support block 1340: gap retaining block
1400: Hinge block 1410: Hinge hole
1420: seesaw bar hole 1500: hinge pin
1600: Stopper 1700: Air cylinder mounting unit
2000: mold 2100, 2110, 2120: gate
2200: Cavity 2300: Runner
2210, 2220: upper and lower cavity cores

Claims (10)

delete delete The air cylinder rod is operated in one direction by the air supplied to the one-way valve and the air cylinder rod is operated by the air supplied to the other directional valve in the other direction,
A seesaw bar provided inside the mold so as to be rotatable in one direction with respect to a hinge point by a unidirectional operation of the air cylinder rod and rotated in the other direction by operating in the other direction of the air cylinder rod,
The gate is cut in the mold by cutting the gate in one direction by rotating the seesaw bar in one direction before solidifying the respective gates provided in the mold so as to rotate the seesaw in the other direction, And a gate cutter portion whose end portion is formed in a wedge shape so as to come out from the gate cutter portion,
The wedge-shaped end portion of the gate cutter portion is not only provided with a linear portion having a predetermined length in parallel with the installation direction of the gate but also formed into a wedge shape only to contact with the cavity when cutting off the gate, In addition,
And a stopper for controlling the angle of rotation of the seesaw bar in the interior of the mold to which the seesaw bar is connected,
The length of the seesaw bar connected to the air cylinder rod at the hinge point is longer than the length of the seesaw bar connected to the gate cutter at the hinge point,
The hinge point is formed by a hinge block formed in a mold by forming a hinge hole so that the seesaw bar can be pivotally mounted on the hinge block and a hinge pin formed in the hinge block and a hinge pin inserted into a seesaw bar hinge hole formed in the seesaw bar Wherein the gate is provided so as to be rotatable. delete delete The method of claim 3,
The gate cutter portion
A gate cutter fixing block fixed to the other end of the seesaw bar; and a gate cutter fixing block inserted in the gate cutter fixing block to cut the gate before the gate is solidified, thereby cutting the gate in the mold and rotating the seesaw in the other direction, And a gate cutter supporting block fastened to the gate cutter fixing block so as to prevent the gate cutter from coming off the gate cutter fixing block. delete delete delete A solenoid valve unit operable to supply air to the valve from the sequence time controller which receives the pressure-holding completion signal when the pressure in the injection molding machine is completed,
And a gate automatic cutting apparatus according to any one of claims 3 and 6, which is operated by air supplied from the solenoid valve unit.

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