KR20010090107A - Manufacturing method of diskgate and the apparatus - Google Patents

Abstract

PURPOSE: A method and an apparatus for manufacturing a disc gate are provided to integrally perform a trimming process and inject the disc gate as well as removing a gate formed on the disc gate at the same time when the disc gate is injected. CONSTITUTION: An inlet(130) and a passageway(140) are formed on an injection molder to form a disc gate having a predetermined shape. An upper mold(110) is downwardly moved. A cavity part has a disc gate being formed between the upper mold(110) and a lower mold(120) which is coupled with the upper mold(110). A predetermined material is injected inside the cavity part of the disc gate though the passageway(140). The material is hardened for a predetermined period of time. A gate which is formed on a central groove part of the disc gate is removed according to a cutting operation of a cutting punch member(160), which is upwardly moved by a predetermined driving means from a predetermined position of the lower mold(120). The disc gate from which the gate is removed is ejected by an eject member(170) which is provided to the lower mold(120).

Description

Manufacturing method and apparatus for disk gates {MANUFACTURING METHOD OF DISKGATE AND THE APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a disk gate and a manufacturing apparatus thereof, and more particularly to a disk gate for ejecting a disk gate in a predetermined mold apparatus and simultaneously removing a gate formed on the disk gate. It relates to a manufacturing method and a manufacturing apparatus thereof.

In general, the disk gate is formed by injection molding to be used as an accessory for an electronic product such as a notebook. The shape of the disk gate is such that a hole is formed in the center of a disc-shaped body to install a button or the like on the hole. Since molded articles are injected using gates, it is possible to prevent generation of weld marks due to injection moldings, and thus they are widely applied to molded articles in which aesthetic elements are important.

1 is a partial cutaway perspective view of a disc gate showing a state in which a gate is formed in a central hole during injection molding of a disc gate according to the prior art, and FIG. 2 is a part of a disc gate in which a gate is removed after injection molding of the disc gate of FIG. 1. Incision view.

Referring to FIG. 1, a process of trimming after the forming process of the above-described disc gate is described. First, an injection-filled injection-molded product is injected into a mold cavity having a disc shape inside a predetermined injection mold through an injection hole. (10) is formed, in which the primary and secondary gates (12, 14) are formed in the upper direction of the central hole and the central hole of the mold of the disc gate 10 by the flow path of the injection during the injection charge do.

Accordingly, the operator performs a trimming process of removing the gate formed in the central hole portion of the disc gate 10, and the operator removes the primary gate 12 and the secondary gate 14 protruding above the central hole portion. Each will be removed by separate work. The gate removing operation first removes the protruding secondary gate 14 manually using a trimming cutting tool, and then removes the primary gate 12 according to a predetermined press process. After the trimming operation, the molding process for the disc gate (see FIG. 2) is completed.

However, the manufacturing process for the above-mentioned disk gates has a problem in that trimming operations for the gates formed on the disk gates are performed separately, such as first removing the protruding secondary gates and then removing the primary gates according to a predetermined press process.

Such a problem may cause scratches on the disc gate when removing the protruding secondary gate, and other problems that may cause a safety accident for the operator due to the press operation when removing the primary gate. It became.

In addition, since the trimming process for the disc gate is performed according to a separate process for the first and second gates as described above, there is another problem that the production cost is increased due to the addition of the process and the quality of the molded product is reduced.

Accordingly, an object of the present invention is to provide a method for manufacturing a disc gate to perform a trimming process for the disc gate while simultaneously injecting the disc gate according to the injection / filling of a predetermined injection product in the injection molding machine.

In addition, another object of the present invention is to provide an apparatus for manufacturing a disc gate, which allows the gate formed on the disc gate to be removed at the same time as the injection on the disc gate.

The manufacturing method of the disk gate according to the present invention for achieving the above object, by moving the upper mold of a predetermined injection molding machine equipped with an injection hole and an injection path to form a disk gate having a predetermined shape, the An upper and lower mold joining step of forming a mold space part in which the disk gate is formed between an upper mold and a lower mold coupled to the upper mold; Injecting a predetermined injection into the mold space of the disc gate through the injection pipe; Hardening the injection molded product for a predetermined time from a state in which the injection molded product is injected; Removing a gate formed at a central hole of the disc gate according to a cutting operation of the cutting punch member which is moved upward by a predetermined driving means from a predetermined position of the lower mold corresponding to the upper mold; And removing the disk gate from which the gate is removed in the step by the ejecting member provided in the lower mold.

In addition, the apparatus for manufacturing a disc gate according to the present invention, in an injection molding machine for filling / injecting a predetermined injection molded product, is moved up and down by a predetermined cylinder driving means, and an injection molded product for injecting the injection molded product. An upper mold provided with an injection hole for transporting the injection injected through the injection hole and the injection hole and a first disc forming portion recessed on the bottom thereof to form an upper shape of the disc gate by the injection material transferred to the injection path; The second disk forming part is formed on an upper surface corresponding to the first disk forming part, and a mold space part of a disk gate shape is formed in a state of being coupled to each other and is introduced through the injection path in a state of being in close contact with the upper mold. A predetermined sphere is removed to remove the gate of the hardened disk gate in the mold space portion. And a lower mold having a cutting punch member driven up and down by the driving means and an ejecting member driven by the eject driving means to take out the disk gate gated by the cutting punch member.

Preferably, the cutting punch member is characterized in that the guide groove is formed through the lower portion of the body formed in a substantially round bar shape, and moved up and down by a driving force applied to the punch guide pin inserted into the guide groove.

In addition, a plurality of mold spaces may be formed, and injection molding transport paths for transferring the injected material injected into the mold spaces are respectively formed.

According to the present invention having the above-described configuration, in the case of forming the disc gate by the disc gate manufacturing apparatus, by simultaneously removing the gate formed at the same time as the injection process of the disc gate, the cost is reduced due to the reduction of the injection molding process. The savings and productivity can be increased.

1 is a partial cutaway perspective view of a disc gate showing a state in which a gate is formed in the central hole during injection molding of the disc gate according to the prior art;

FIG. 2 is a partial cutaway perspective view of a disk gate from which a gate is removed after injection molding of the disk gate of FIG. 1;

3 is a schematic cross-sectional view showing an apparatus for manufacturing a disc gate according to the present invention;

Figure 4 is a schematic cross-sectional view showing a combined state of the upper mold and the lower mold for injection molding the disk gate in the disk gate manufacturing apparatus of Figure 3,

Figure 5 is a schematic cross-sectional view showing the removal state of the gate formed in the central hole of the disk gate after completion of the disk gate forming by the disk gate manufacturing apparatus of FIG.

6 is a schematic cross-sectional view showing a state in which the upper mold and the lower mold are separated to take out the disk gate after completion of the disk gate forming by the disk gate manufacturing apparatus of FIG. 3;

7 is a side view of FIG. 3;

8 is a flowchart for performing a manufacturing process of a disk gate according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: injection molding machine, 110: upper mold,

120: lower mold, 130: injection hole,

140: injection molding transport path, 150: mold cavity (cavity),

152: disk gate, 154: first disk forming unit,

156: second disc forming portion, 160: cutting punch member,

170: ejection member, 180: guide member,

162: punch guide pin, 164: guide groove.

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

Figure 3 is a schematic cross-sectional view showing a manufacturing apparatus of the disk gate according to the present invention, Figure 4 is a schematic cross-sectional view showing a combination of the upper mold and the lower mold for injection molding the disk gate in the disk gate manufacturing apparatus of FIG. FIG. 5 is a schematic cross-sectional view illustrating the removal of a gate formed in the central hole of the disk gate after completion of the disk gate forming by the disk gate manufacturing apparatus of FIG. 3, and FIG. 6 is a disk gate using the disk gate manufacturing apparatus of FIG. 3. Figure 7 is a schematic cross-sectional view showing the upper mold and the lower mold separated to take out the disc gate after molding is completed, Figure 7 is a side view of FIG.

As shown therein, the injection molding machine 100 is driven by a cylinder driving means (not shown) and is moved up and down, and is injected through the injection hole 130 and the injection hole 130 for injecting a predetermined injection. The first disk forming unit 154 is recessed and formed on the bottom surface of the disk gate 152 so as to form an upper shape of the disk gate 152 by the injection material transport path 140 for transporting the injection material and the injection material transported to the injection material transport path 140. The upper mold 110 and the second disk forming portion 156 are formed on the upper surface corresponding to the first disk forming portion 154 and the mold space portion 150 having a disk gate shape is coupled to each other. The cutting pin driving means is formed to flow through the injection port 140 in the state in close contact with the upper mold 110 to remove the gate of the disk gate 152 cured in the mold space 150. Drawing not shown) The lower mold is provided with an ejecting member 170 driven by an ejection driving means to eject the disk punch 152 whose gate is removed by the cutting punch member 160 and the cutting punch member 160. 120).

In addition, the upper mold 110 has a guide member 180 on the side surfaces of the upper mold 110 and the lower mold 120 to be moved in a guided state in a straight line at the time of coupling / separation with the lower mold 120. Is formed.

And, the curing time of the injection molding is preferably about 5-10 seconds.

On the other hand, as shown in the side view of Figure 7, although the mold space portion 150 formed between the upper and lower molds 110 and 120 for taking out the disk gate 152 is shown in only one place, the injection hole 130 The mold space portion having the same shape may be further formed on the left side of the mold space portion 150, and the injection of the injection molding into the mold space portions is performed through one injection hole 130.

The disc gate injection process and the gate removal process by the apparatus for manufacturing a disc gate configured as described above will be described with reference to FIGS. 3 to 8 as follows.

First, in a state where the upper and lower molds 110 and 120 of the injection molding machine 100 are spaced apart by a predetermined distance D, as shown in FIG. 3, the operator is provided with a cylinder provided on the upper mold 110. When the upper mold 110 is moved downward by a predetermined distance by operating the driving means (step 200 of FIG. 8), the upper mold 110 is coupled with the lower mold 120 while the first disk forming part 154 and the second are formed. The disk forming portion 156 is brought into close contact with each other, and a mold space 150 having the same shape as the shape of the disk gate 152 to be molded, that is, a mold to be molded is formed.

Then, when the mold space portion 150 is formed as described above, when the operator inserts a predetermined injection through the injection hole 130 on the upper mold 110, the injected injection is a mold through the injection transport path 140 It is filled in the space portion 150 (step 210), and the injection-molded product is cured after a predetermined time, for example, approximately 5-10 seconds has elapsed in the mold space portion 150 to form the shape of the disc gate 152 ( Step 220).

After that, the disk gate 152 needs to be taken out, and the taking out process will be described.

In the ejection process, first, a process of removing the gate formed in the center hole of the disc gate mold during the injection process of the disc gate 152 should be preceded. The removal process is performed at the bottom of the disc gate 152, that is, the lower mold. It is to be performed by the cutting punch member 160 provided at a predetermined position of 120.

When the diameter (R) of the cutting punch member 160 has the same diameter as the inner diameter of the central hole of the disc gate 152, when the cutting punch member 160 is moved upward by a predetermined cutting pin driving means, The outer circumferential end of the cutting punch member 160 cuts through the central hole portion while cutting the connection portion between the disc gate 152 and the gate to push out the gate formed at the central hole portion, so that the gate is separated from the disc gate 152. To be removed (step 230) (see FIG. 5).

At this time, the lifting operation of the cutting punch member 160 is a punch guide pin 162 formed at a predetermined position of the cutting punch member 160 of the guide groove 164 in accordance with the cylinder drive in the cutting punch member 160, for example. The upper end of the cutting punch member 160 in a state of being in contact with the central hole is moved upward by a predetermined distance from the lower end, thereby performing a cutting operation.

As described above, the gate formed in the central hole of the disc gate 152 is integrally removed according to the driving of the cutting punch member 160, thereby independently removing the primary and secondary gates in the related art as described above. The process can be shortened as compared to the above.

On the other hand, when the upper mold 110, which is moved downward for the molding operation of the disc gate 152 from the state in which the gate is removed, is raised by the cylinder driving means and returned to the initial position state (see FIG. 6), the The upper mold 110 and the lower mold 120 between each other to maintain the initially set separation distance (D). When the eject member 170 located at the lower edge of the disc gate 152 is moved up by a predetermined distance according to the driving of the driving means installed to drive the eject member, the lower mold ( The disc gate 152 formed on the 120 is displaced upwardly of the lower mold 120 (step 240).

As a result, the disk gate 152 as described above with reference to FIG. 2 can be taken out (step 250).

According to the above application example, it can be seen that the gate formed at the circular hole portion of the disc gate can be removed at the same time as the injection of the disc gate.

As described above, according to the manufacturing method of the disc gate and the manufacturing apparatus thereof, the primary and secondary gates formed in the central hole portion of the disc gate are simultaneously removed when the disc gate is injected. By doing so, the manufacturing process is simplified, the productivity is improved, and according to the prior art, it is possible to prevent the scratches generated when the first and second gates are manually removed, thereby improving the quality of the molded article.

In addition, by not performing a press process that has been conventionally performed to remove the gate, there is an effect that can prevent a safety accident.

Claims (4)

In order to form a disc gate having a predetermined shape, the lower mold coupled to the upper mold 110 is moved downward by moving the upper mold 110 of the predetermined injection molding machine equipped with the injection hole 130 and the injection port 140. Upper and lower mold (110, 120) coupling step of forming a mold space portion 150 in which the disc gate 152 is formed between (120); The mold space portion of the disk gate 152 through the injection pipe 140 150, injecting a predetermined injection into the interior; Hardening the injection molded product for a predetermined time from a state in which the injection molded product is injected; The center hole of the disc gate 152 is formed in accordance with the cutting operation of the cutting punch member 160 which is moved upward by a predetermined driving means from a predetermined position of the lower mold 120 which is in close contact with the upper mold 110. Removing the gate; And discharging the disk gate (152) from which the gate is removed in the step by the eject member (170) provided on the lower mold (120). In the injection molding machine for filling / injecting a predetermined injection molded product, It is moved up and down by a predetermined cylinder driving means, and an injection molding injection port 140 and an injection molding transportation path 140 for transferring the injection injected through the injection injection hole 130 for injecting the injection. An upper mold 110 having a first disk forming portion 154 recessed on a bottom thereof to form an upper shape of the disk gate 152 by an injection material transferred to the upper surface of the disk gate 152; In the state where the second disk forming portion 156 is formed on the upper surface corresponding to the first disk forming portion 154 and coupled to each other, a mold space portion 150 having a disk gate shape is formed, and the upper mold 110 is formed. Cutting punch member 160 which flows up and down by a predetermined driving means to remove the gate of the disc gate 152 hardened in the mold space 150 by flowing through the injection pipe 140 in a state in close contact with ) And a lower mold 120 having an eject member 170 driven by an eject driving means to eject the disk gate 152 gated by the cutting punch member 160. An apparatus for manufacturing a disk gate. The method of claim 2, The cutting punch member 160 is vertically moved by a driving force applied to the punch guide pin 162 inserted into the guide groove 164 is formed through the lower portion of the body formed in a substantially round rod shape, the guide groove 164 Apparatus for producing a disc gate, characterized in that. The method of claim 2, The mold space portion 150 is formed in plurality, the injection molding apparatus for the disc gate, characterized in that the injection molding means for transporting the injected injection material in the mold space portion 150 is formed respectively.