KR101706988B1 - Eject pin jigs for manufacture of molds - Google Patents

Eject pin jigs for manufacture of molds Download PDF

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Publication number
KR101706988B1
KR101706988B1 KR1020150059527A KR20150059527A KR101706988B1 KR 101706988 B1 KR101706988 B1 KR 101706988B1 KR 1020150059527 A KR1020150059527 A KR 1020150059527A KR 20150059527 A KR20150059527 A KR 20150059527A KR 101706988 B1 KR101706988 B1 KR 101706988B1
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KR
South Korea
Prior art keywords
head
eject pin
jig
eject
seating
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KR1020150059527A
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Korean (ko)
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KR20160127955A (en
Inventor
이치재
Original Assignee
주식회사 진영코리아
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Priority to KR1020150059527A priority Critical patent/KR101706988B1/en
Publication of KR20160127955A publication Critical patent/KR20160127955A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/061—Work-clamping means adapted for holding a plurality of workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for manufacturing an eject pin of a metal mold for manufacturing an eject pin used in a metal mold for molding a precision and small product and more particularly to a jig for manufacturing an eject pin, In machining the head portion of the fin, a large number of eject pins can be fixed to the jig to facilitate easy and stable machining at the same time, thereby improving productivity and precision.
This is a jig which is used for a mold and has a long rod-shaped slide bar and a jig which is integrally formed at one end of the slide rod and fixes an eject pin having a large diameter and a short length for processing, A plurality of semicircular seating grooves 111 are formed on the upper surface of the eject pin 10 in such a manner that the slide pins 11 of the eject pin 10 can be seated thereon. A seating member 110 on which a head seating groove 112 is formed; And a pressing pad 130 for pressing the eject pin 10 that is seated on the seating member 110 is integrally mounted on the bottom surface of the fixing member 110. The pressing member 130 is attached to the bottom surface of the fixing member 110 by a bolt 140, And a head cutting jig (100) composed of a head cutter (120) for cutting the head of the eject pin according to its length.

Description

Eject pin jigs for manufacture of mold < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for manufacturing an eject pin of a metal mold for manufacturing an eject pin used in a metal mold for molding a precision and small product and more particularly to a jig for manufacturing an eject pin, In machining the head portion of the fin, a large number of eject pins can be fixed to the jig to facilitate easy and stable machining at the same time, thereby improving productivity and precision.

In general, in a die for injection molding various synthetic resin products or a die casting die for casting aluminum products, a component called an eject pin is inevitably used for demolding an injection molded product from a mold.

A plurality of eject pins are installed and used depending on the structure and the shape of the mold and are required to be made of a steel material made of a special steel having a very strong strength because a number of operations are repeated in order to demold the product to be molded in the mold have.

The ejection pin is composed of a circular rod so that the slide operation can be smoothly performed even though it is made of special steel such as stainless steel having excellent strength. In other words, the eject pin has a long circular rod slide bar, And has a structure in which the diameter of the one end is larger than that of the slide bar and the length of the head is integrally provided.

Accordingly, since the ejection pin as described above requires very precise operation due to its functional characteristics, it is difficult and difficult to manufacture the ejection pin. Moreover, the ejection pin used in the mold for molding relatively small products is very small in size And there was a difficulty in manufacturing.

Since the size of the eject pin is relatively small and precise, it is largely dependent on manual operation. When the rod-shaped material is fixed to the vise, the dimension of the head portion is accurately displayed Followed by cutting the surface as well as the length of the head by using a tool such as a grinder or a hand grinder.

However, the manufacturing process of such a common eject pin uses some tools such as a vise, but due to its structural characteristics, most of the work is done manually by a skilled artisan, so the workability is significantly lowered, resulting in poor productivity and a large defect rate .

Since the precision machining can not be performed by manual cutting, it is necessary to reassemble the ejected fin by a grinder after assembling the ejected fin to the mold, and there is a problem such that the die mold surface is cut off .

Accordingly, a manufacturing method of the eject pin has been proposed in order to solve such a problem, and this is an eject pin cutting apparatus for molds of Utility Model Publication No. 1990-0008410.

This is to provide an eject pin guide support portion between the abrasive tool operated by the electric motor and the dimension adjusting tool using the principle of barier caliper on the die of the jig so that the eject pin can be processed quickly and precisely. The ejection pin is pushed forward to fix the ejection pin on the axis line between the grinder and the fixing plate in a state in which the ejection pin is interposed in the guide groove between the pair of holders in the missing state, After finely setting, the cutting is performed with the accuracy of calculating the Bourneial caliper type scale.

However, although the above-mentioned design has been based on manual work only, a mechanized cutting device is used. However, due to the structural characteristics of the eject pin, there are still many parts that depend on manual work. Further, work for fixing the eject pin is very difficult However, this method is one in which cutting is performed after setting one by one, so that the workability and precision are still deteriorated.

Another conventional method of manufacturing the eject pin is disclosed in Korean Patent Registration No. 10-0845123.

The present invention relates to an eject pin used for demolding in a mold for taking out an injection or cast product from an injection mold, a die casting mold, etc., and a method of manufacturing the same, wherein the slide bar and the head of the eject pin are made of steel wires of different diameters And then the slide bar and the head are separated and assembled to each other. Thus, the manufacturing cost can be reduced.

That is, the head is assembled to a single-layer end portion at one end of the slide rod so as to have a diameter smaller than that of the slide portion and having diamond grooves crossing the entire outer surface in a single layered state, The inner surface of the assembled hole is tightly adhered to the outer surface of the end of the single layer by the forging process, and at the same time, is inserted into the diamond grooves intersecting with each other.

However, since the above-described line registration method is a system in which slidable rods and heads are respectively manufactured and assembled integrally, the efficiency of manufacturing can be expected. However, since the strength is weak, there is a possibility that the slide rods and the heads may be separated And there is a limit in manufacturing an eject pin having a very small size.

On the other hand, molds for manufacturing very precise and small-sized components used in semiconductors or very precise and small-sized products applied to various industrial fields are widely used recently.

For example, the ejection pins have a diameter of less than 1φ (0.5, 0.6, 0.7) and a diameter of the head of 2φ or less 1.6, 1.8). Another type of eject pin is required to have a diameter of the slide bar of 1? Or less (0.5, 0.6, 0.7), a head of 3 to 5Φ and a height of 2 to 4t. Since it is small and precise, there is a considerable difficulty in manufacturing.

Particularly, as described above, the size of the ejection pin or the slide bar of the very small size of the slide bar and the head is small, while the thickness of the head is relatively thick and the length is short. As such, there is a limit to automating using mechanical devices.

Therefore, in order to manufacture a small and precise eject pin, it is only necessary to manufacture the ejection pin depending on the manual operation of the skilled artisan, thereby causing a problem such that the productivity is lowered or the precision is lowered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a mold for manufacturing an eject pin of a mold which requires very small size and accuracy, And a jig for manufacturing a pin.

It is another object of the present invention to provide an ejection pin of various types such as an eject pin having a relatively small thickness and a relatively large thickness of a slide bar, So that the productivity can be improved by providing the jig for manufacturing an eject pin of a mold.

Particularly, the present invention provides a method for manufacturing a large number of eject pins at the same time, which can easily process a non-slip surface formed on a head, and a mold for easily processing an eject pin of a very small size, And a jig for manufacturing an eject pin.

According to an aspect of the present invention, there is provided a jig for manufacturing an eject pin having an improved ejection pin structure, And a non-slip surface cutting jig for cutting a non-slip surface to prevent slippage in the head portion of the eject pin processed in the head cutting jig.

A head cutting jig according to the present invention includes: a seating member in which a plurality of eject pins are seated in a row in a row; a fixing member fixedly coupled to the seating member by a bolt to firmly press the eject pin, And a pressing pad which is fixedly attached to one surface of the fixing member and fixes the ejection pin seated on the seating member firmly without any flow, thereby fixing a large number of ejection pins at a time to easily cut the head portion into an appropriate length .

The non-slip surface cutting jig also includes a seating member for seating a plurality of eject pins in a row, a fixing member fixedly coupled to the seating member by a bolt to securely fix the eject pin seated on the seating member, And a plurality of ejection pins are firmly fixed to each other, so that the non-slip surfaces can be cut at a time.

The present invention relates to a head cutting jig for cutting a head portion of an eject pin processed in a previous step to an appropriate length and a non-slip surface cutting jig for cutting a non-slip surface on the surface of the head, So that the head portions of a large number of the eject pins can be simultaneously processed at the same time and the productivity can be improved.

That is, according to the present invention, in the case of cutting a length of a head portion to an appropriate length in machining an eject pin, it is processed by using a head cutting jig, and a slip prevention surface is cut It is possible to simultaneously process the head cutting process of the eject pin at a large number of times by using the non-slip surface cutting jig, thereby remarkably improving the productivity.

Further, the present invention is advantageous in that an eject pin having a very small size or various shapes can be easily fixed, so that an eject pin having a very small size or various shapes can be easily processed all at once will be.

1 is a schematic view showing a manufacturing process of an eject pin required in the present invention;
Fig. 2 is a diagram showing the configuration of another type of ejection pin required in the present invention
3 is an exploded perspective view of the head cutting jig according to the present invention.
Fig. 4 is a side cross-sectional view
Fig. 5 shows the operating state diagram of Fig. 4
6 is an enlarged view of a part of the present invention Fig. 3
7 is a partial plan view of the seating member of the present invention
Figure 8 is a partial front view of the present invention Figure 3
FIG. 9 is a partially enlarged view of FIG. 8
Figure 10 shows the operating state diagram of Figure 9
11 is an exploded perspective view showing another embodiment of the present invention.
12 is a partially enlarged view of the present invention Fig. 11
Fig. 13 is a cross-sectional view of the operating state of Fig. 11
14 is an exploded perspective view showing the non-slip surface cutting jig of the present invention
Fig. 15 is a schematic sectional configuration diagram of Fig. 14
16 is a partially enlarged view of the present invention Fig. 15
Figure 17 is a partial plan view showing the seating member in Figure 14 of the present invention.
18 shows the state in which the eject pin is seated in Fig. 17 according to the present invention

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

FIGS. 3 to 10 show the structure of a head cutting jig for cutting a head of an eject pin. FIGS. 11 to 13 show another embodiment Fig. 14 shows a non-slip surface cutting jig for cutting the non-slip surface on the head of the eject pin.

In the figure, reference numeral 100 denotes a head cutting jig for cutting the head of the eject pin to an accurate length, and reference numeral 200 denotes a head for cutting the head of the eject pin And a slip prevention surface cutting jig for cutting at least one or more non-slip surfaces on the surface of the slip prevention surface.

The head cutting jig 100 includes a seating member 110 in which a plurality of eject pins 10 are seated in a row and a plurality of ejection pins 110 fixedly coupled to the seating member 110 by a bolt 140, And a pressing pad 130 which is fixedly attached to one surface of the fixing member 120 and firmly fixes the eject pin 10 without flowing, A plurality of eject pins 10 are fixed at a time, so that the head 12 can be easily cut to an appropriate length.

The seating member 110 has a rectangular body and a plurality of seating grooves 111 are formed on the upper surface at equal intervals so that the sliding rods 11 of the eject pins 10 can be inserted and seated, And a head seating groove 112 in which the head 12 of the ejection pin 10 is inserted and seated is formed at its front end with a step.

The ejection grooves 111 and the head seating grooves 112 are formed in a semicircle having an upper opening and are arranged in the same line so that the ejection pins 10 can be stably positioned when the ejection pins 10 are inserted, It is possible to easily mount or dismount the apparatus.

In this case, the seating groove 111 and the head seating groove 112 may be formed as semicircular grooves. Alternatively, the seating groove 111 may be formed as a triangular groove and fixed in a point-contact manner, The number of the electrodes may be varied according to the overall size, and it is preferable to form approximately 80-130 pieces.

The fixing member 120 attached to and detached from the seating member 110 with a plurality of bolts 140 is also formed in a rectangular shape and a pressing pad 130 for pressing the ejection pin 10, which is seated on the seating member 110, Are integrally formed and attached.

The pressing pad 130 provides a function of strongly pressing the head 12 of the eject pin 10 that is seated on the seating member 110 and fixing the same without any movement. The pressing pad 130 is made of a material such as urethane or synthetic resin And adhered to the bottom surface of the fixing member 120 by a strong adhesive.

Accordingly, the head cutting jig 100 is useful for cutting the length of the head 12 of the ejection pin 10 to an accurate length. As shown in the figure, a plurality of The ejection pin 10 is inserted and fastened in such a manner that the slider rod 11 of the ejection pin 10 is inserted into the formed mounting groove 111 and the head 12 is seated in the head mounting groove 112 at the front end thereof .

When a separate fixing member 120 is assembled on the upper surface of the seating member 110 with the bolts 130, the ejection pins 10 The ejection pin 10 is firmly fixed in the head cutting jig 100 without any flow.

In this state, the head cutting jig 100 is installed in a separate cutting device (not shown) to cut the end portion of the head 12 protruding to the outside of the jig into the correct size, To the correct dimensions.

11 to 13 of the accompanying drawings show another embodiment of the present invention.

In this embodiment, as shown in the accompanying drawings, by dividing the seating member in the head cutting jig 100 and changing the structure so that the head mountable portion of the eject pin can be replaced, various different sizes or The eject pins 10 having different shapes can be processed in a compatible manner.

In this embodiment, the seating member of the head cutting jig 100 is divided into a slide bar seating member 150 and a head seating member 160, and the slide bar seating member 150 is provided with a slide bar A plurality of semicircular slide rod seating grooves 151 are formed at equal intervals so that only the slider 11 can be inserted and seated and the head seating member 160 is fastened to the fastening surface 152 ) Are formed at a step.

The head seating member 160 is formed in a structure having a step so as to be coupled to and separated from the engagement surface 152 of the slide bar seating member 150 by the bolt 140, The head seating groove 161 in which the head 12 of the pin 10 is inserted and seated is formed as a semicircle opening toward the front and a plurality of equally spaced portions are formed along the longitudinal direction.

At this time, the head seating member 160 is formed in a number of different sizes and lengths of the head seating groove 161 at the front end thereof. That is, the size and the length of the head 12 depend on the shape of the ejection pin 10 It can be replaced and used as needed.

Particularly, in the embodiment of the present invention, since the head 12 of the eject pin 10 is fixed, even when the size and shape of the head 12 are different, the head 12 of the eject pin 10 is large and short in diameter , The slide bar 11 can be effectively fixed and processed even when the diameter thereof is much smaller.

On the other hand, the eject pins 10 to be machined as described above are cut at least one or more non-slip surfaces 13 on the surface of the head 12 as necessary.

The non-slip surface cutting jig 200 for cutting the non-slip surface 13 is shown in detail in FIG. 14 and subsequent figures of the accompanying drawings. As shown in FIG. 14, the non-slip surface cutting jig 200 includes a seating member A fixing member 220 attached to and detached from the mounting member 210 as a bolt 140 and a pressing pad 130 attached and fixed to the bottom surface of the fixing member 220.

The seating member 210 has a rectangular body and a plurality of the seating members 211 are formed along the longitudinal direction of the seating groove 211 on which the slide bars 11 of the eject pins 10 are inserted .

The mounting groove 211 is formed in a semi-circular shape having an opening at the top, so that the eject pin 10 can be stably mounted at the time of insertion, and the eject pin 10 can be easily mounted or dismounted.

Since the seat 12 of the ejection pin 10 is protruded to the front surface of the ejection pin 10, only the slide bar 11 of the ejection pin 10 is inserted and seated, Preventing surface 13 can be easily machined by the jig. The number of the non-slip surfaces 13 can be varied according to the overall size of the jig, but it is possible to form about 80 to 130 pieces.

In this case, the seating groove 211 may be formed as a semicircular groove, or a triangular groove may be used as another example.

The fixing member 220 attached to and detached from the mounting member 210 with the bolt 140 is also formed in a rectangular shape and a pressing pad 130 for pressing the eject pin 10 mounted on the mounting member 210 is formed on the bottom surface And is integrally formed.

The pressing pad 130 is provided with a function of strongly pressing the slide bar 11 of the eject pin 10 and fixing it without a fluid. The pressing pad 130 is made of urethane or synthetic resin having excellent elasticity, ) By a strong adhesive agent.

The non-slip surface cutting jig 200 as described above is for effectively cutting the non-slip surface 13 on the surface of the head 12 according to the purpose of use of the eject pin 10, The slider rod 11 of the eject pin 10 is inserted into the seating groove 211 of the seat member 210 and the head 12 is projected outwardly.

When the fixing member 220 is assembled on the upper surface of the seating member 210 as a plurality of bolts 130, the pressing pad 130 attached to the bottom surface of the fixing member 220 contacts the seating member 210 The ejection pins 10 are firmly fixed without being moved by strongly pressing the slide bar 11 of the ejected ejection pin 10 to be pressed.

In this state, the non-slip surface cutting jig 200 is installed on a separate known cutting device and then the one side surface of the head 12 is cut using the same to thereby slide the ejection pin 10 head 12 It is possible to simultaneously process the preventing surface 13 as exact dimensions.

In other words, not only the plurality of eject pins 10 fixed to the non-slip surface cutting jig 200 can be machined at the same time, but also the machining accuracy can be improved, and productivity and precision can be improved.

In the case where the non-slip surface 13 is to be formed on both sides of the head 12 of the eject pin 10, the non-slip surface cutting jig 200 can be directly turned upside down without being disassembled, Can be completed.

As another embodiment of the present invention, the same effect can be expected even if the seating groove of the seating member in which the eject pin is inserted is formed as a triangular groove instead of a semicircular shape. In this case, So that the clamping force can be doubled.

10: eject pin 11: slide rod
12: head 13;
100: head cutting jig 110, 210:
111, 211: seating groove 112, 161: head seating groove
120, 220: fixing member 130: compression pad
140: Bolt 150: Slide rod seating member
151: slide bar seating groove 152: fastening surface
160: head seating member 200: non-slip surface cutting jig

Claims (5)

delete A jig which is used for a die for injection molding and has a long rod-shaped slide bar and a jig which is integrally formed at one end of the slide rod and which has a diameter larger than that of the slide rod and which is made of a head and is fixed for processing As a result,
A slide rod seating member 150 having a rectangular body and having a plurality of semicircular slide rod seating grooves 151 formed at equal intervals so that only the slide rods 11 can be inserted and seated;
A plurality of semicircular head seating grooves 161 are formed in the front end of the slide bar seating member 150 so as to be detachable by a bolt 140 and the head 12 of the eject pin 10 is inserted into the groove. A head seating member 160 to be formed;
And a fixing member 120 detachably mounted on the front surface of the slide bar seating member 150 and integrally attached with a pressing pad 130 for pressing and fixing the eject pin 10, Wherein the jig for manufacturing an eject pin of a mold is characterized in that the jig for manufacturing an eject pin of a mold is characterized in that the jig can be cut to meet the length.
3. The method of claim 2,
Wherein the slide bar seating groove (151) of the slide bar seating member (150) is formed as a triangular groove. delete delete
KR1020150059527A 2015-04-28 2015-04-28 Eject pin jigs for manufacture of molds KR101706988B1 (en)

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KR101706988B1 true KR101706988B1 (en) 2017-02-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190108430A (en) 2018-03-14 2019-09-24 재영솔루텍 주식회사 Apparatus for fabricating eject pin automatically
KR102253325B1 (en) 2020-03-03 2021-05-18 김옥현 Jig for supporting head of eject pin, apparatus for fabricating eject pin with the same, and method for fabricating eject pin using the apparatus for fabricating eject pin

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107297447B (en) * 2017-07-04 2023-12-22 惠州市其正科技有限公司 Jig for thimble cutting
KR102405550B1 (en) * 2020-11-25 2022-06-03 이수영 jig for machining diamond shape pins for positioning
CN112975786A (en) * 2021-03-01 2021-06-18 辽宁优迅科技有限公司 Box laser external lens mounting and fixing device and mounting method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004291188A (en) * 2003-03-27 2004-10-21 Nisshin Kasei:Kk Polishing tool, end face polishing device, and set jig for polishing tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004291188A (en) * 2003-03-27 2004-10-21 Nisshin Kasei:Kk Polishing tool, end face polishing device, and set jig for polishing tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190108430A (en) 2018-03-14 2019-09-24 재영솔루텍 주식회사 Apparatus for fabricating eject pin automatically
KR102253325B1 (en) 2020-03-03 2021-05-18 김옥현 Jig for supporting head of eject pin, apparatus for fabricating eject pin with the same, and method for fabricating eject pin using the apparatus for fabricating eject pin

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