KR101192376B1 - An apparatus for cutting the injection mold having a plate - Google Patents

Abstract

PURPOSE: A device for cutting a molded article comprising a plate body is provided to prevent the assembling fault caused by length fault by performing cutting process for a plate body based on the edge portion of the plate body contacted with a stopper. CONSTITUTION: A device(100) for cutting a molded article comprises a position aligning unit(110) and a cutting unit(120). The position aligning unit comprises a worktable(111), plate-contact reciprocating cylinders(112, 113), a contact reciprocating cylinders(114). A plate body(13) is settled on the placing bar(111a) of the worktable. The touch bars(115a, 115b) of the plate-contact reciprocating cylinders are contacted with the both edges of the plate body. The contact reciprocating cylinders moves back and forth and reciprocates the touch bars. The position aligning unit aligns the position of the plate body. The cutting blade(121) of the cutting unit moves up and down a holder(122) comprising a cutting blade(121). The cutting unit cuts the boundary region of a gate and the edge of one end of the plate body.

Description

An Apparatus for Cutting the Injection Mold having a Plate}

The present invention relates to an apparatus for cutting an injection molded product having a plate molded into a plate shape, and more particularly, to automate the operation of cutting a plate connected to a gate in an injection molded product having a plurality of plates such as a light guide plate, The present invention relates to an injection molding machine having a plate that can accurately and smoothly perform a cutting operation.

In general, injection molding is one of the most widely used manufacturing methods for molding plastic resin products.

Such injection molding is a method of forming a molded article corresponding to the cavity shape by injecting the resin melted in the heating cylinder into a cavity of a mold closed at high pressure and solidifying or curing the mold. The mold is formed of a material such as a metal having excellent heat resistance. And a plurality of cavities formed in a shape corresponding to the injection product to be manufactured, a sprue into which the molten resin is injected, a runner to disperse and supply the molten resin injected through the sprue into a plurality of cavities, and The gate and the like are formed to have a relatively small cross-sectional area to control the flow of molten resin injected into the cavity.

Therefore, the molten resin injected from the nozzle of the injection molding machine is solidified after being filled into the cavity through the sprue, the runner and the gate of the mold, and the sprue, the runner and the gate, which are unnecessary parts when the solidified product is separated from the mold, are also cavity. Since it is taken out together with, the post-process for removing unnecessary parts from the molded article is required.

On the other hand, a liquid crystal display (LCD) employed in terminals such as mobile phones and smartphones is equipped with a backlight unit (Back Light Unit) that diffuses the light brightly, the backlight unit is a frame assembly and an optical film It consists of a combination of these.

The frame assembly is mounted on a transparent light guide plate mounted inside a frame mold composed of a rectangular frame, and the light emitted from the LED fixed to the flexible substrate provided on one side of the light guide plate is refracted into the light guide plate and attached to the lower part of the light guide plate. It is a system irradiated upward by the surface light source by the reflective film.

The light guide plate is formed in a transparent substantially rectangular plate shape, and the light guide plate is injection molded, and the light guide plate separated from the injection molding is connected to the gate 12 and extends from the gate 12 as shown in FIG. 5. 11) is separated from the mold.

Accordingly, in the related art, a worker puts an injection product, which is a workpiece having a gate 12 extending from the left and right sides of a vertical runner 11 and a light guide plate 10 connected thereto, on a separate jig, and then, as a knife. The light guide plate 10 was cut off from the injection molded residue by manually cutting the connection portion between the end of the light guide plate 10 and the gate 12.

However, since such a conventional operation may change the length between one end of the light guide plate that is cut from the knife and the other end that is not cut according to the manual operation, the size of the light guide plate is poor in the process of assembling the light guide plate to the frame. Due to this, there was a problem that the assembly work between the light guide plate and the frame is not made smoothly.

In addition, since the work of cutting the injection molded light guide plate from the gate is made by hand, there is a limit in improving work productivity, and there is a problem in that an operator having a very high skill in cutting work is required to reduce the light guide plate size defect rate.

The present invention is to solve the problems as described above, the object is to automate the operation of cutting and removing the gate connected to a plurality of plate body unattended, plate body that can perform the cutting operation precisely and smoothly without the length of the plate body To provide an injection molding apparatus having a.

As a specific means for achieving the above object, the present invention is a device for cutting so as to separate the gate and the runner from an injection made of a scrap and a plate comprising a gate and a runner, the work table having a seating table is disposed Equipped with a pair of reciprocating cylinders for the left and right pair of plate contact for reciprocating the touch bar forward and backward so as to contact both edges of the plate placed on the seat, A position alignment unit having a reciprocating cylinder to align the position of the plate body so that the other edge of the plate body connected to the gate and the cutting reference stopper are in contact with each other; A cutting section for cutting a boundary region between the other end border of the plate body and the gate in contact with the cutting reference stopper, having a cutting reciprocating cylinder for raising and lowering a holder having a cutting blade positioned directly above the cutting reference stopper; It provides an injection molding machine having a plate body comprising a.

Preferably, the apparatus further includes a gripping supply unit for supplying the plate to be mounted on the seating plate, wherein the gripping supplier provides a first horizontal reciprocating cylinder for reciprocating the first air gripper for holding a runner connected to the gate of the plate. And a first horizontal reciprocating cylinder for elevating and descending the first horizontal reciprocating cylinder, and including a second horizontal reciprocating cylinder for reciprocating forward and backward of a movable table on which the first vertical reciprocating cylinder is installed.

Preferably, the rotary unit further comprises a rotating unit for rotating the injection molding, the rotating unit is provided with a second air gripper for holding a runner connected to the gate of the plate body, the rotary motor for rotating the second air gripper at a predetermined angle with respect to a vertical axis Include.

More preferably, the rotating part is fixedly installed on one side of the cutting reciprocating cylinder of the cut portion.

Preferably, one side of the seating table on which one of the left and right plates of the injection molding is mounted is provided with an auxiliary work table on which the other plate is placed on the opposite side.

More preferably, between the seating table and the auxiliary work platform is provided with a discharge chute and the gate and the runner is cut off the left and right plates cut off.

More preferably, the seating surface and the upper surface of the auxiliary work table is provided with a plurality of air suction holes for generating an air suction input.

Preferably, the touch bar of the reciprocating cylinder for close contact is provided with a replaceable elastic vertical plate on the front end to elastically contact with one side edge of the free plate to prevent bending of the plate body, the elastic vertical plate on the seat It is placed in the cut incision.

The present invention as described above has the following effects.

(1) By aligning the plate position of the object to be cut so that the other edge of the plate connected to the gate and the cutting reference stopper are in contact with each other in the alignment portion, and cutting the boundary region between the aligned plate and the gate as a vertically operated cutting blade, Since the plate can be cut based on the edge of the plate in contact with the cutting reference stopper, it is possible to improve the reliability of the product by preventing the assembly failure due to the length defect during cutting during assembly of the light guide plate and the frame.

(2) Since the work of cutting and removing the plate connected to the gate can be automated, the workability of cutting the plate can be improved, and the manufacturing cost can be reduced.

1 is a perspective view showing an injection molding apparatus having a plate according to a preferred embodiment of the present invention.
Figure 2 is a perspective view of an injection molding machine having a plate body from another angle according to a preferred embodiment of the present invention.
3A to 3E are working flow charts illustrating a process of positioning, cutting and rotating the injection molding in the injection molding apparatus having a plate according to a preferred embodiment of the present invention.
4A to 4C are working flowcharts illustrating a process of aligning and cutting a plate body in an injection molding machine having a plate body according to a preferred embodiment of the present invention.
5 is a perspective view showing an injection molded product having a general plate body.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Injection molding apparatus 100 having a plate body according to a preferred embodiment of the present invention, as shown in Figures 1 and 2, is produced by the injection mold process and roughly composed of the scrap consisting of the gate 12 and the runner 11 Positioned to automatically and precisely cut the boundary area between the plate body 13 and the gate 12 so as to separate the gate 12 and the runner 11 from the injection product 10 including the plate body 13 on the square plate. It includes an alignment unit 110, the cutting unit 120.

The position alignment unit 110 is the worktable 111, the plate contact reciprocating cylinder to align the position of the plate 13 in contact with the other end border of the plate 13 and the cutting reference stopper 111b connected to the gate 12 (112, 113) and the reciprocating cylinder 114 for close contact.

The work table 111 is a fixed structure having a seating table 111a on which the plate body 13, which is a cutting object, is raised and disposed horizontally.

One side end of the seating stand (111a) is provided with a cutting reference stopper (111b) in contact with the rim of the plate body 13 to always perform the cutting operation by the cutting blade 121 to be described later at a predetermined position.

The plate contact reciprocating cylinder (112, 113) is installed on the upper end of the cylinder holder (112a, 113a) fixed to the left and right sides of the worktable 111, respectively, of the plate body 13 mounted on the seating (111a) It is a cylinder member for reciprocating the touch bars 115a and 115b forward and backward so as to be in contact with both left and right edges.

Here, the touch bar (115a, 115b) is the plate body 13 in the long hole (112c, 113c) of the carriage (112b, 113b) assembled to reciprocate to the upper slide surface of the reciprocating cylinder (112, 113) for the plate contact It is preferable to be assembled as a fastening member so as to vary the distance from both sides of the edge.

The close-up reciprocating cylinder 114 is a cylinder member which is installed on the opposite side of the cutting blade 121 to operate the forward and backward reciprocating operation of the touch bar 115c, which is in contact with the edge of the free end of the plate body 13.

The close contact reciprocating cylinder 114 is installed on the upper end of the cylinder holder (114a) similar to the plate contact reciprocating cylinders (112, 113), the touch bar (115c) on the upper slide surface of the close contact reciprocating cylinder (114). It is preferable to be assembled as a fastening member so that the distance to one end of the plate body 13 can be varied in the long hole 114c of the carriage 114b reciprocally assembled.

Here, the touch bar 115c of the reciprocating cylinder 114 for close contact is an elastic vertical plate elastically in contact with one side edge of the plate 13 which is a free end to prevent bending of the plate when contacted with the plate 13 which is a cutting object. 117 is provided so as to be replaceable at the tip, and the elastic vertical plate 117 is preferably disposed so as not to interfere with the cutout 111c cut in the seat 111a.

The worktable 111 and the cylinder holder 112a, 113a, 114a are fixed structures fixedly installed on the upper surface of the horizontal base 119.

The cylinder holders 112a, 113b, and 114b may detect the state where the edges of both sides and one side of the plate 13 and the ends of the touch bars 115a, 115b, and 115c are in contact with the carriages 112b, 113b, and 114b. It is preferable to include a touch sensor 116 that the front end is in contact with the fixed plate 116a provided in the 113a, 114a to generate a detection signal.

In addition, one side of the seating platform 111a on which one of the left and right plates 13 of the injection molded product 10 is mounted is provided with an auxiliary work platform 118 on which the other plate 13 is placed on the opposite side, thereby allowing the seating to be carried out. In the cutting operation on the plate body 13 mounted on the base 111a, the injection molded product having the remaining plate body is prevented from falling downward.

In addition, between the seating stand 111a and the auxiliary work platform 118, the left and right plates 12 and 13 of the injection molding 10 are cut and the gate 12 and the runner 11, which are scraps, are dropped and discharged. A discharge chute 118a is provided.

Here, the seating surface (111a) and the upper surface of the auxiliary work table 118 is provided with a plurality of air suction holes connected to the air suction line to prevent the movement of the plate body 13 during the cutting operation is generated air suction input It is preferable.

The cutting part 120 includes a cutting blade 121 and a cutting reciprocating cylinder 123 so as to cut a boundary area between the other end of the plate 13 and the gate 12 in contact with the cutting reference stopper 111b.

The cutting blade 121 is a knife member which is assembled to be replaced as a fastening member at the lower end of the holder 122 positioned directly above the cutting reference stopper 111b.

The cutting reciprocating cylinder 123 is installed perpendicular to the upper surface of the other cylinder holder 123a fixed to the upper surface of the base 119, the holder for assembling the cutting blade replaceable as a fastening member at the lower end It is a cylinder member which raises and lowers 122. As shown in FIG.

The holder 122 is preferably assembled with a carriage to move up and down along the sliding surface formed on one side of the cutting reciprocating cylinder 123.

On the other hand, one side of the alignment unit 110 includes a gripping supply unit 130 for gripping and supplying the injection molded product 10 to be mounted on the seating plate (111a).

The gripping supply unit 130 is provided with a first air gripper 131 connected to the gate 12 of the plate 13 and gripping a vertical rod-shaped runner 11 as a tong 131a capable of opening and tightening. In addition, the first air gripper 131 is assembled to the front and rear reciprocating movement on the rod end of the first horizontal reciprocating cylinder 132.

The first horizontal reciprocating cylinder 132 is assembled to move up and down on a fixed plate 133a mounted to the rod end of the first vertical reciprocating cylinder 133, and the first vertical reciprocating cylinder 133 is mounted on the base. It is fixed to the fixing plate 134b assembled perpendicular to the moving table 134a of the second horizontal reciprocating cylinder 134 installed on the bottom surface side by side with 119.

Accordingly, the first air gripper 131 having the tongs 131 gripping the runner 11 of the injection molded product 10 is advanced back and forth by the first horizontal reciprocating cylinder 132, and the first horizontal reciprocating cylinder 132 is raised and lowered together with the first air gripper 131 by a first vertical reciprocating cylinder 133, and the first vertical reciprocating cylinder 133 is moved by the second horizontal reciprocating cylinder 134. The reciprocating horizontally moves along the base along with the first air gripper 131 and the first horizontal reciprocating cylinder 132.

In addition, one side of the cutout 120 is cut off any one of the pair of plate 13 connected via the gate 12 to the left and right sides of the lower end of the runner 11 to change the position of the remaining plate body. On the basis of the (11) includes a rotating unit 140 for rotating the injection molding 10 by 180 degrees.

The rotating unit 140 is provided with a second air gripper 141 having a forceps 141a capable of opening and tightening to grip the runner 11 connected to the gate 12 of the plate 13, and the second air. The gripper 141 is provided with a rotation motor 142 for rotating a predetermined angle about the vertical axis.

Here, the rotation motor 142 of the rotating unit 140 is preferably fixed to the motor block 143 is fixed to one side of the cutting reciprocating cylinder 123.

Accordingly, the injection molding 10 having completed the cutting work for the plate in the seating unit of the position alignment unit 110 is gripped by the first air gripper 131 and moved to the tongs of the second air gripper 141. After being gripped, the injection molded product 10 may be rotated by an angle of 180 degrees so that the plate 13 which is not cut by the rotation of the rotary motor 142 corresponds to the seating portion 111a of the alignment portion.

As a device of the present invention having the above-described configuration, the operation of cutting the plate body 13, which is a rectangular light guide plate through the gate 12, on the left and right sides of the lower end of the vertical runner 11 is shown in Fig. 3A. First, the injection molding material 10 which is a workpiece is placed on the supply plate 119a of a certain height.

In this state, the first air gripper 131 of the gripping supply unit 130 is advanced by the first horizontal reciprocating cylinder 132 to be close to the injection molding, and the pinching operation of the tongs 131a which are opened to both sides during air supply. The first air gripper 131 is moved backward by the reverse return operation of the first horizontal reciprocating cylinder 132 while gripping the runner 11.

Subsequently, the injection molded product 10 held by the air gripper 131 is positioned along the base 119 by the forward operation of the second horizontal reciprocating cylinder 134, as shown in FIG. 3B. When the injection molding 10 is horizontally moved to the side, and the injection molding 10 is disposed directly above the seating stand 111a, the horizontal movement of the second horizontal reciprocating cylinder 134 is stopped and at the same time, for holding the injection molding put on the supply plate. By lowering return operation of the first vertical reciprocating cylinder 133 which has been lifted up, any one of the left and right plates 13 of the injection-molded product 10 is placed on the seat 111a, and the other plate is opposite. 13 is mounted on the upper surface of the auxiliary work bench 118 that is provided perpendicular to one side of the work table 111.

In this state, the first air gripper 131 is lifted by the lift operation of the first vertical reciprocating cylinder 133 while releasing the grip of the runner 11 by the open operation of the tongs 131. The second horizontal reciprocating cylinder 134 moves to the reverse position so as to be located near the cutting blade 121 and waits.

Then, the cutting blade 121 of the cutting unit 120 is lowered to cut the boundary area between the plate body 13 and the gate 12, and then perform the operation of aligning the position of the plate body of the injection target object. do.

As shown in FIG. 4A, the cutting blade 121 is in an elevated standby state, and plate contact cylinders 112 and 113 and close contact reciprocating cylinders 114 disposed on the left and right sides and one side of the seating stand 111a are provided. Backward return to the touch bar (115a, 115a, 115b) to wait outside.

Subsequently, when one side plate 13 of the injection-molded product 10 gripped by the first air gripper 131 of the gripping supply unit 120 is placed on the seating plate 111a, as shown in FIG. 4B, the By the forward operation of the plate contact cylinders 112 and 113 and the reciprocating cylinder 114 for close contact, the left and right sides of the plate body 13 come into contact with the touch bars 115a and 115b of the plate contact cylinder, The other edge of the plate body 13 connected to the gate 12 while the plate body 13 is pushed toward the cutting reference stopper by the elastic vertical plate 117 of the touch bar 115c advanced by the forward operation of the cylinder 114. Is in contact with the cutting reference stopper (111b).

At this time, one side edge of the plate body and the elastic vertical plate 117 abut so that the other edge of the plate body 13 is in contact with the cutting reference stopper 111b, it is possible to prevent the bending of the plate body 13, which is the object to be cut. The elastic vertical plate 117 is disposed so as not to interfere with the cutout 111c cut into the seating stand 111a and is moved forward and backward with the touch bar 115c.

Subsequently, when the alignment of the other edge of the plate body 13 connected to the gate 12 is in contact with the cutting reference stopper 111b, as shown in FIG. As the cutting blade 121 descends directly below, the boundary region between the plate 13 placed on the seating stand 111a and the gate 12 extending from the runner 11 is cut to date.

At this time, since the cutting operation of the plate body 13 by the lowering operation of the cutting blade 121 is made based on the other edge of the plate body 13 in contact with the cutting reference stopper 111b, the cutting position is always kept constant. While maintaining the size of the plate to be cut is always constant and uniform.

In addition, the left and right pairs of plate bodies 13 connected to the left and right sides of the lower end of the runner 11 at the time of cutting by the cutting blade 121 are formed on the upper surface of the seat 111a and the auxiliary work table 118. At the same time to prevent movement by the air adsorption force provided by the suction hole (118b) it is prevented that the remaining injection-molded product 10 is cut down to the lower side.

On the other hand, the cutting operation for the other side plate 13 after the cutting operation for one side plate is completed, as shown in Figure 3c, the opening of the first air gripper arranged in the vicinity of the position alignment unit 110 By operation, the one side plate 13 is cut and the runner 11 of the injection molded product 10 in which the remaining plate remains is held, and then the injection molded product 10 is moved by the backward operation of the second horizontal reciprocating cylinder 134. The second air gripper 141 of the rotating part 140 is positioned correspondingly.

At this time, the plate body 13 cut by the cutting blade 121 is positioned in a post process by the adsorption block of the adsorption transfer unit (not shown) and is removed from the seat 111a.

Subsequently, as shown in FIG. 3D, the runner 11 of the injection molded product 10 held by the tongs 131a of the first air gripper 131 is moved by the forward operation of the first horizontal reciprocating cylinder 132. Entering without interference between the open forceps 141a of the second air gripper 141, when the injection is gripped by the pinch operation of the forceps 141a of the second air gripper 141, on the contrary, the first air gripper ( The gripped tongs 131a of 131 are opened to release the grip of the runner 11.

And, when the second air gripper 141 holding the injection molded body remaining only on one side is rotated in one direction by a 180-degree rotation operation of the rotary motor 142, the position of the plate is switched 180 degrees The mounting table 111a and the plate body 13 correspond to each other.

In this state, if the injection material is also gripped by the first air gripper 131 by the retracting operation of the forceps that are opened so that the runner of the rotated injection material is held by the first air gripper 131, the second air gripper is reversed. The first air gripper 131 holding the injection molding by the backward return operation of the first horizontal reciprocating cylinder 132 is released while the gripped tong of 141 is opened and the second air gripper is released. (141).

Subsequently, the plate is placed on the seating stand 111a of the alignment unit 110 so that the cutting operation of the plate of the injection molded product held by the first air gripper 131 is performed in the same process as above. The boundary area between the plate body 13 and the gate 12 is cut by the cutting blade 121, and the gate 12 and the runner 11 separated from the plate body are dropped into the discharge chute 118b by their own weight. It is discharged to the bottom.

In addition, the first air gripper 131 and the first horizontal reciprocating cylinder 132, which are grip-released to put the plate body on the seating table, are moved to the next injection molding by the backward return operation of the second horizontal reciprocating cylinder 134. It is horizontally moved toward the feed plate for gripping and feeding operations.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

10: injection molding 11: runner
12: gate 13: plate
110: position alignment unit 111: work table
111a: Mounting table 111b: Cutting standard stopper
112,113: plate contact cylinder 114: reciprocating cylinder for close contact
115a, 115b, 115c: touch bar 116: touch sensor
117: elastic vertical plate 118: auxiliary work table
118a: discharge chute 118b: air suction hole
120: cutting portion 121: cutting blade
122: holder 123: reciprocating cylinder for cutting
130: gripping supply unit 131: first air gripper
132: first horizontal reciprocating cylinder 133: first vertical reciprocating cylinder
134: second horizontal reciprocating cylinder 140: the rotating part
141: second air gripper 142: rotation motor
143: Motor Block

Claims (8)

An apparatus for cutting to separate a gate and a runner from an injection molding comprising a scrap and a plate including a gate and a runner,
A work table having a seating table on which the plate body is disposed, and a pair of left and right plate contacting reciprocating cylinders for reciprocating the touch bar back and forth so as to be in contact with both side edges of the plate body mounted on the seating board. A position aligning unit having a close-up reciprocating cylinder for reciprocating the touch bar in contact with the contact bar and aligning the position of the plate so that the other edge of the plate connected to the gate and the stopper for cutting reference are in contact with each other;
A cutting section for cutting a boundary region between the other end border of the plate body and the gate in contact with the cutting reference stopper, having a cutting reciprocating cylinder for raising and lowering a holder having a cutting blade positioned directly above the cutting reference stopper; Including,
The touch bar provided in the close-up reciprocating cylinder is provided to replace the elastic vertical plate elastically contacting the one side edge of the free plate to the front end to prevent the bending of the plate body, the elastic vertical plate is cut in the seat Injection molding apparatus having a plate body characterized in that disposed on the cut. The method of claim 1,
Further comprising a gripping supply for supplying the plate to be mounted on the seating plate,
The gripping supply unit includes a first horizontal reciprocating cylinder for reciprocating forward and backward reciprocating a first air gripper for holding a runner connected to a gate of the plate, and includes a first vertical reciprocating cylinder for lifting and lowering the first horizontal reciprocating cylinder. And a second horizontal reciprocating cylinder for reciprocating forward and backward of the movable table on which the first vertical reciprocating cylinder is installed. The method of claim 1,
Further comprising a rotating part for rotating the injection molded product,
The rotating unit includes a second air gripper for holding a runner connected to the gate of the plate body, the injection molding apparatus having a plate body, characterized in that it comprises a rotating motor for rotating the second air gripper at an angle with respect to the vertical axis. The method of claim 3,
The rotating unit is cut the injection molding apparatus having a plate body, characterized in that fixed to one side of the cutting cylinder for cutting. The method of claim 1,
On one side of the seating table on which one of the left and right plates of the injection molding is mounted, the injection molding apparatus having a plate body, characterized in that it comprises an auxiliary work table on which the other plate is placed on the opposite side. The method of claim 5,
Between the seating table and the auxiliary work platform injection device cutting device having a plate body characterized in that it has a gate and the runner is cut off and discharged runners are cut off. The method of claim 5,
And an upper surface of the seating table and the auxiliary work bench, the apparatus having a plate body comprising a plurality of air suction holes for generating air suction inputs. delete

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