KR100763950B1 - High tempered injection molding machine with aperture formed on the sides of upper side core - Google Patents

Abstract

A high temperature injection molding machine is provided in which vertical and horizontal taper blocks are bolt-coupled to an insertion portion of an upper mold base and inserted into an insertion hole of an upper core to fix the upper core and prevent crack of the upper core. A high temperature injection molding machine includes a core unit having an upper core(10) and a rear core, and a mold base unit having an upper mold base(20) and a rear mold base. The upper mold base has an insertion portion(21) with a space expansible by the thermal expansion of the upper core. The space has gaps(22) formed in a lateral direction of the upper core. A vertical taper block for fixing the upper core in a horizontal direction and a horizontal taper block for fixing the upper core in a vertical direction are orthogonally coupled to the insertion portion where a lower surface of the upper core contacts. The upper core has an insertion groove(50) formed at the lower surface thereof contacting the insertion portion of the upper mold base, and the insertion groove accommodates the vertical taper block and the horizontal taper block.

Description

HIGH TEMPERED INJECTION MOLDING MACHINE WITH APERTURE FORMED ON THE SIDES OF UPPER SIDE CORE}

1 is a conventional high temperature mold injection machine.

2 is a plan view and a front view of a top core and an upper mold base of a high temperature mold injection machine in which a gap is formed on a side surface of a core according to the present invention;

Figure 3 is a cross-sectional view of the high-temperature mold injection machine formed in the gap core side surface according to the present invention.

Figure 4 is a view for explaining the tapered block shape of the high-temperature mold injection machine formed in the gap side of the upper surface core according to the present invention.

<Explanation of symbols for main parts of the drawings>

10: upper surface core 20: upper mold base

21: insertion part 22: gap part

30: injection molding 40: taper block

50: insertion groove 60: the lower mold base

70: rear core

The present invention relates to a high-temperature mold injection machine in which a gap is formed on a side of a top core, and more particularly, to a fatigue stress caused by thermal expansion of a top core through a gap formed on a side of a top core generated when the top core and the top mold base are inserted and coupled. The present invention relates to a high temperature mold injection machine for preventing the accumulation of and supporting the upper core by a plurality of taper blocks coupled to the upper mold base.

Normal injection molds are usually used for injection molding.

However, in the case of a general mold injection molding machine, a synthetic resin, which is a kind of plastic, is mainly used. When the injection work is performed using the synthetic resin as a mold injection material, the density of the resin and the resin contacting part does not match each other. Lines are generated in the area, which not only looks aesthetically bad but also the quality of the injection molding is poor. Therefore, in order to remove the line from a general mold injection machine, the work is usually done by using iron to corrode the line, so-called embossing to conceal the line, or another method by using a spray to hide the line itself. Although the conventional method, such a conventional method is not only harmful to the human body by spraying, but also causes environmental problems due to iron corrosion work is not used much.

In order to solve such a conventional problem, a plurality of hot wires are inserted into the upper mold base to rapidly raise the temperature to about 60 ° C. to 120 ° C. at areas where the resin meets the resin, that is, at different densities, so that the line is not formed in the injection molding. Started using a high temperature mold injection machine.

In addition, in order to gloss on the surface in the past, after the injection molding using a synthetic resin, the film coating to give a gloss effect through a two-step process of gloss, but after mixing the glass material in the synthetic resin raw material and the high temperature When the injection molding surface is injected at a high temperature by using a mold injection machine, the glass crystal rises on the surface, and thus, the gloss effect can be obtained on the surface even after one treatment without the film coating process.

As shown in FIG. 1, in the conventional high temperature mold injection machine, the upper core 10 is inserted into the insert 21 of the upper mold base 20 to prevent defective products of the injection molding 30 and fix the core. By manufacturing the same size and size, the tolerance when the upper surface core 10 is inserted into the insertion portion 21 of the upper mold base 20 is eliminated.

Accordingly, the injection rate of the injection molding 30 is lowered because the movement and the clearance of the upper core 10 inserted into the upper mold base 20 are not generated during the injection operation, but the injection molding is continuously performed at a high temperature. The temperature of the upper core 10 as well as the base 20 is increased. As the temperature of the upper core 10 rises, thermal expansion occurs gradually in the upper core 10. At this time, there is no tolerance in the lateral direction of the upper mold base 20 and the upper surface core 10, so that the upper surface core 10 bears the stress generated due to thermal expansion.

That is, in the conventional high temperature mold injection machine, the fatigue stress accumulated by the upper core 10 does not exist with the upper mold base 20 contacting the side surface of the upper core 10 and the upper mold base 20 does not exist. Due to the blockage, the upper surface core 10 cannot be solved, and thus the upper surface core 10 cannot endure the fatigue stress so that cracks or cracks occur, thereby preventing the use of the upper surface core 10.

As a result, the manufacturing and replacement cost increases because the top core needs to be manufactured and replaced again, and the injection work is not operated at all while the top core is replaced, which causes not only financial problems but also serious waste of time.

In addition, even if cracks do not occur, the thermal expansion accumulates continuously and the core itself is displaced. As a result, the injection molded product is not properly injected and is distorted, resulting in an unstable dimension of the injected product, resulting in an increase in the defective rate. do.

In addition, during the injection operation, a crack phenomenon occurs in the upper surface core, so that scratches or foreign substances caused by the cracks are included in the injection product during the injection operation, thereby degrading the quality of the product.

In addition, when inserting the upper surface core to the insert portion of the upper mold base, there is no tolerance at all, it is necessary to carefully manage when accommodating and inserting, thereby causing a problem of increasing the work time.

The present invention was devised to solve the conventional problems as described above, by expanding the side surface of the thermally expandable upper surface through the gap when inserted into the upper surface and the upper mold base so that fatigue stress does not accumulate. It is an object of the present invention to provide a high temperature mold injection machine in which vertical and horizontal tapered blocks coupled to an upper mold base support and fix an upper surface core.

In order to achieve the above object, the present invention includes a core portion including a top core for forming the shape front surface of the injection molding and a rear core for forming the rear surface during the injection operation, and a heating wire and inserting the top core into the front surface. In the high temperature mold injection machine comprising an upper mold base and a mold base portion including a post-molded base for inserting the rear core, the insert portion of the upper mold base expands due to thermal expansion when the upper core is accommodated. The space that can be formed is a structure in which the gap is formed in the lateral direction of the upper surface core, and a vertical taper block for fixing the upper surface core in a horizontal direction and a horizontal taper block for fixing the upper surface core are provided in an insertion portion where the lower surface of the upper surface is in contact with each other. Orthogonally coupling; wherein the top surface core is a shovel of the top mold base. Characterized in that the insertion groove for inserting and receiving corresponding to the vertical tapered block and the horizontal tapered block on the lower surface in contact with the mouth.

In addition, the vertical and horizontal tapered block is bolted to the insertion portion of the upper mold base;

In addition, the vertical and horizontal tapered block is orthogonal to the center point of the insertion portion;

In addition, the vertical and horizontal tapered block is the length of the long axis is 2 to 3mm shorter than the length of the long axis of the insertion groove to be inserted;

Hereinafter, with reference to the accompanying drawings will be described in detail the high temperature mold injection machine formed in the gap portion of the upper surface core.

Figure 2 is a view for explaining the upper mold base and the upper surface core of the hot mold injection machine formed in the gap between the upper surface core according to the present invention, Figure 2 (a) is a front view before the upper mold base and the upper surface core, Figure 2 (b) is a front view after the coupling, Figure 2 (c) is a view showing a plan view of the upper mold base and the upper surface core.

3 is a cross-sectional view of the high temperature mold injection machine in which the gap portion according to the invention is formed on the upper surface side surface.

As shown in FIG. 2 and FIG. 3, the present invention provides a high temperature mold injection machine in which a gap 22 is formed when the top core 10 is inserted into the upper mold base 20 in which the vertical and horizontal tapered blocks are bolted together. It is about.

That is, the present invention relates to the characteristics of the coupling portion of the upper mold base phase 20 and the upper surface core 10, the other high-temperature mold injection machine portion (for example, the lower mold base 60, the rear core 70 The description of)) will be omitted.

To describe the present invention in more detail,

The high temperature mold injection machine is largely divided into a core part and a mold base part.

The core part includes a top core 10 for molding the front shape of the injection molding 30 and a rear core 70 for molding the rear surface during the injection operation.

The mold base part includes an upper mold base 20 for inserting and accommodating an upper core 10 for inserting and accommodating a front core 10 that includes a heating wire in a predetermined portion and a rear mold base 60 for inserting and receiving a rear core 70. Done.

Here, the mold base unit refers to the outer components of the mold injection machine, and includes an upper fixing plate, an upper plate, a lower plate, a supporting plate, a leg, an upper-tight plate, a lower-thick plate, a fixing plate, and a plurality of guide pins.

In particular, the present invention relates to a top core 10 for molding a surface portion of the front surface of the injection molded product 30 and an upper mold base 20 for accommodating the top core 10 when an injection operation is performed.

The upper mold base 20 basically supports an upper surface core 10 by having an inserting portion 21 that accommodates the upper surface core 10 by inserting the upper surface core 10.

When the upper core 10 is inserted into the insertion portion 21 of the upper mold base 20, the insertion portion 21 of the upper mold base 20 has a longer side than the upper core 10. The clearance gap 22 of a predetermined magnitude | size is formed in the lateral direction of the upper surface core 10, and is structured. The gap 22 is used as a buffer space in which a space that can be expanded even if thermal expansion occurs in the upper core 10 by injection molding in the high temperature mold injection machine. This means that when the upper core 10 is inflated, it is possible to appropriately cope with the fatigue stress caused by the expansion of the upper core due to the gap 22.

In addition, when the upper surface core 10 is inserted into the insertion portion 21 of the upper mold base 20 due to the tolerance caused by the gap portion 22, the operator can insert more easily.

In other words, the upper surface core 10 is inserted into the insertion portion 21 of the upper mold base 20 to receive the injection work. At this time, the upper surface core 10 is expanded by thermal expansion, by accommodating a portion to be expanded due to the gap portion 22 formed in the upper mold base 20 so that fatigue stress caused by thermal expansion does not accumulate. Therefore, even when the injection operation at a high temperature to prevent the crack phenomenon and cracks that can occur in the upper core 10 has the effect of lowering the failure rate of the upper core 10 and the defective rate of the injection.

However, when the injection work due to the gap between the gap 22 of the upper mold base 20, the upper surface core 10 is flowed may cause a defective product in the injection. So, in order to prevent this, the tapered block 40 is coupled to the insert 21 of the upper mold base 20, the tapered block 40 coupled to the insert 21 of the upper mold base 20 It is inserted into the insertion groove 50 formed in the lower surface of the upper core 10 serves to fix the upper core 10.

In addition, when coupled to the insertion portion 21 of the upper mold base 20, the tapered block 40 is bolted.

To explain this in detail,

The tapered block 40 bolted to the insertion portion 21 is inserted into the insertion groove 50 of the upper core 10 to fix the upper core 10 so that the upper core 10 expands due to thermal expansion. In addition to the movement of the gap 22 through the arbitrary movement does not occur. That is, during the injection operation, the taper block 40 fixes the upper core 10 to lower the defective rate of the injection product.

The taper block 40 is largely divided into a vertical taper block and a horizontal taper block. The taper block 40 is installed in the insertion part 21 at right angles to each other in a cross shape.

In the case of the vertical tapered block serves to fix the upper surface core 10 to prevent movement in the horizontal direction, and in the case of the horizontal tapered block secures the upper surface core 10 to prevent movement in the vertical direction.

That is, two orthogonal to each of the horizontal direction and the vertical direction are installed in the insertion portion 21 by bolt coupling and fixed to the upper core 10, due to the gap 21 when inserted into the upper mold base 20 Prevent and fix movement.

On the other hand, the upper surface core 10 is a portion for processing the front surface of the injection molding.

The upper surface core 10 has an insertion groove 50 which is received in correspondence with the tapered block 40 which is orthogonal to the upper mold base 20 crosswise to the upper mold base 20 in the form of a cross on the lower surface in contact with the insertion portion 21 is formed have.

The upper core 10 is fixed by inserting and receiving the taper block 40 in the insertion groove 50 of the upper core 10.

Here, the insertion groove 21 is longer than the tapered block 40 is inserted, the length of the long axis is formed about 2 to 3mm long, it is preferable to leave a free space when the tapered block 40 is inserted.

When the upper core 10 is expanded by the gap 22 due to thermal expansion, the upper groove 10 of the upper core 10 is caught by the tapered block 40 inserted into the insertion groove 21. By providing a free space in the insertion groove 21 to the problem that the (10) can no longer be expanded, the upper surface core 10 can be smoothly expanded regardless of the tapered block 40 due to the free space during thermal expansion. .

In addition, when the taper block 40 is inserted into the insertion groove 50, when the taper block 40 is not properly inserted or the size of the taper block 40 is the same as the receiving size of the insertion groove 50, the tapered block 40 and the insertion groove When accommodating at 21, a crack may occur due to a frictional impact on a contacting portion, and this may cause a case in which the upper surface core 10 is not properly fixed.

In order to solve this problem, the insertion groove 50 secures a little more insertion space than the tapered block 40, so that the operator inserts the upper surface core 10 into the insertion portion 21 of the upper mold base 20. It is safer and easier to insert.

To summarize the present invention,

As shown in FIGS. 2 (a) and 2 (c), the vertical taper block and the horizontal taper block that are orthogonal to the cross shape with respect to the center point of the insertion part 21 are bolted to the upper mold base 20. The upper surface core 10 includes an insertion groove 50 corresponding to the same position as the tapered block 40.

As shown in FIG. 2 (b), the tapered block 40 of the upper mold base 20 is inserted into the insertion groove 50 of the upper core 10 to accommodate the upper mold base 20. The support 10 is fixed.

At this time, the upper mold base 20 and the upper core 10, the gap 22 is generated between the upper mold base 20 and the upper core 10 when the upper core 10 is inserted. As a result, even when the thermal expansion phenomenon occurs during the injection operation, the upper surface core 10 expands between the gap portions 22 having a predetermined size, thereby minimizing the generation of stress due to thermal expansion.

In addition, the upper surface core 10 may be moved through the gap 22, but the upper surface core 10 is formed by a taper block 40 inserted into the insertion groove 50 formed on the lower surface of the upper surface core 10. The upper surface core 10 is not moved because it is fixed.

Figure 4 is a view for explaining the tapered block shape of the high temperature mold injection machine formed in the gap between the upper surface core according to the present invention.

As shown, the tapered block has a tapered shape and is bolted to an insertion portion of the upper mold base.

When the tapered block is bolted to the insertion unit, the taper blocks are orthogonally coupled to each other in the vertical direction and the horizontal direction with respect to the center point of the insertion unit. Ensure that the core does not move by the gaps.

At this time, the tapered block is formed in a tapered shape when inserted and accommodated in the insertion groove of the upper surface core, even if not properly inserted due to the angle difference due to the tapered shape is completely inserted and accommodated.

Therefore, the tapered block is more smoothly and smoothly inserted into the insertion groove, and prevents the occurrence of an impact when the taper block is inserted into the insertion groove, thereby preventing cracking and cracking of the tapered block.

In the above, the present invention has been illustrated and described with respect to preferred embodiments, but the present invention is not limited to the above-described embodiments, and does not depart from the gist of the present invention as claimed in the following claims, and thus, the general knowledge in the art Anyone with a variety of modifications are possible, of course, such modifications are within the scope of the claims.

As described above, the present invention is a high-temperature mold injection machine having a gap portion formed on the side surface of the upper core, and when the mold base and the upper surface core are inserted, a gap portion formed laterally of the upper surface core is formed, and in the orthogonal direction to the insertion portion of the upper mold base. When the vertical and horizontal taper blocks are bolted together and inserted into the insertion grooves of the upper core to fix the upper core, the upper core is expanded to a gap even when a thermal expansion phenomenon occurs during the high temperature injection work. Since fatigue stress is not transmitted and accumulated, the cracks and cracks of the upper surface core are prevented.

In addition, the warpage phenomenon of the injection molding and the scratching of the injection molding core, which may be caused by thermal expansion of the upper core, are also prevented, thereby increasing the quality of the injection molding even further.

In addition, when the top core is inserted into the insert portion of the upper mold base, the operator can easily insert due to the tolerance generated through the gap portion, thereby reducing the coupling time.

Claims (4)

In the injection operation, an upper mold base and a rear core including an upper part core for forming a shape front surface of the injection molding and a rear core for forming a rear surface and a heating wire, and an insert portion for inserting the upper core into the front surface are inserted and accommodated. In the high temperature mold injection machine comprising a mold base portion including a post-mold base to Insertion portion of the upper mold base, When the top core is accommodated, the space in which the top core is expanded due to thermal expansion is a structure in which a gap is formed in the side direction of the top core, And a vertical taper block for fixing the top core in a horizontal direction and a horizontal taper block for fixing in the vertical direction are orthogonally coupled to each other in an insertion portion where the lower surface of the top core is in contact with each other. The upper core, High temperature mold injection machine formed in the side surface of the upper surface core, characterized in that the insertion groove for inserting and receiving corresponding to the vertical taper block and the horizontal tapered block formed on the lower surface in contact with the insert portion of the upper mold base. The method of claim 1, wherein the vertical and horizontal tapered blocks, High temperature mold injection machine is formed on the side of the upper surface core portion, characterized in that the bolt coupling portion to the insert portion of the upper mold base. The method of claim 1, wherein the vertical and horizontal tapered blocks, Orthogonal to the center point of the insertion unit; wherein the gap is characterized in that the high-temperature mold injection machine formed on the side of the upper surface core. The method of claim 1, wherein the vertical and horizontal tapered blocks, The length of the long axis is 2 to 3mm shorter than the length of the long axis of the insertion groove to be inserted; high-temperature mold injection machine formed in the side surface of the gap.

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