KR20150058797A - Vent uint for injection molding - Google Patents

Abstract

The present invention relates to a vent member for injection molding and, more specifically, relates to a vent member for an injection molding device capable of discharging air remained in a mold to the gaps between a recessed part (凹) and a protruded part (凸) when vent members composed of the recessed parts and the protruded parts corresponding to each other are coupled to each other. The present invention as a technical means of solving the above purpose mentioned above, the vent member mounted to discharge the internal air of the mold during injection molding comprises: a first vent unit having a first vent body; and a plurality of protruded parts arranged on one side of the first vent body and a second vent unit having a second vent body, and recessed parts coupled to the protruded parts inserted on one side of the second vent body.

Description

[0001] VENT UINT FOR INJECTION MOLDING [0002]

The present invention relates to a vent member for injection molding, and more particularly, to a vent member for injection molding, more particularly, to a vent member for injection molding, which comprises a vent member composed of a concave portion and a convex portion corresponding to each other, And a vent member of an injection molding apparatus for discharging air.

The injection mold is a device that produces a product with the same shape as the mold cavity by injecting molten metal into the mold and solidifying it. In this case, when casting is performed using an injection mold, all the air in the inner space of the mold is discharged, and when the molten metal is completely filled in the space, the best quality product can be produced. However, in reality, the more complicated the product, the more complicated the internal space of the mold, and the more complicated the internal space of the mold, the less air can escape.

If the inside air of the mold can not escape smoothly, the molten metal can not be filled in the space. Therefore, voids may be generated inside the product, or a part of the product may not be firmly connected. Therefore, it is important to discharge the inside air when the molten metal is injected in the injection mold, and in particular, a vent member for discharging the residual air is used at a corner where the air can not easily escape due to a corner or a bent portion .

An example of a vent member according to the prior art is Japanese Patent Application Laid-Open No. 2000-167644 (hereinafter referred to as "prior art"). In the prior art, a plurality of divided portions 18 are provided where air is required to be discharged. A gap 24 is formed between the divided portions, and a seat 22 is provided in the gap. Thereby allowing air to escape through the gaps 24 and preventing the molten metal from flowing out or clogging the gaps 24 by the sheet 22.

However, in the case of the vent member according to the related art, it is necessary to provide a plurality of dividing portions according to the area to be discharged air, and it becomes difficult to fix the vent member to the mold as the number of the dividing portions increases . Further, in order to adjust the size of the gap, a plurality of vent members must be provided because of the use of split-type parts having different specifications.

JP 2000-167644 A1 KR 10-2007-0064042 A1

SUMMARY OF THE INVENTION The present invention provides a vent member for injection molding that allows air to be discharged through a gap between a recess and a groove by engaging a vent member having a concave portion and a groove portion with each other, There is a purpose. Further, it is an object of the present invention to provide a vent member having a position fixing portion, which can fix not only the gap between the vent members, but also adjust the vent member.

The present invention as a technical means for solving the above object is a vent member mounted for discharging the internal air of a mold in injection molding, the vent member comprising a first vent body and a plurality of iron A first vent unit formed on the first vent unit; And a second vent unit having a concave portion that can be coupled to the other side of the second vent body while the convex portion is inserted into the second vent body.

In a preferred embodiment of the present invention, the vent member is further provided with a position fixing portion, wherein the position fixing portion has a protrusion or a groove portion formed in the first vent unit, and the first vent When the first vent unit and the second vent unit are coupled with each other, a groove or protrusion having a shape corresponding to the protrusion or the groove is formed at a position where the protrusion or the groove is located, And the engaging portions are engaged with each other.

According to a preferred embodiment of the present invention, the second vent unit further includes an assembling part at a lower part thereof, wherein a first mounting part is formed on both longitudinal sides of the assembling part, and on both sides of the lower part of the second vent unit, A second mounting portion having a shape corresponding to the mounting portion may be formed, and an assembled seat surface may be formed to pass through the assembly portion in a vertical direction.

In a preferred embodiment of the present invention, a third mounting portion may be further formed at an end of the convex portion of the first vent unit.

According to the venting member for injection molding according to the present invention, not only is it easy to adjust the gap through which the air is discharged, but also the vent member can be easily mounted on the mold. In addition, since the shape of the vent member can be formed in a desired shape separately from the shape of the protrusion, it is advantageous in that it can be applied to various types and shapes of molds.

1 is an exploded perspective view of an injection molding vent member according to the present invention.
FIG. 2 is a perspective view of a vent member for injection molding according to the present invention. FIG.
3 is a view showing a use state of a venting member for injection molding according to the present invention.

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

FIG. 1 is an exploded perspective view of an injection molding vent member according to the present invention, and FIG. 2 is an assembled perspective view of an injection molding vent member according to the present invention.

1 and 2, an injection molding vent member 100 includes a first vent body 113 and a plurality of convex portions 115 at one side of the first vent body 113 A concave portion 135 corresponding to the shape of the convex portion 115 is formed on the other side of the second bent body 133 and the first bent unit 110 and the second bent body 133, And a second vent unit 130 in which the second vent unit 130 is formed. In addition, the vent member 100 may further include a position fixing part and an assembly part 150 for more preferable implementation of the present invention. Here, the term 'corresponding' means that the concave portion is formed in such a shape that the convex portion can be engaged with the protruding shape like the convex portion, and the same meaning is used in the following.

The first vent body 113 of the first vent unit 110 may have a block shape having a predetermined thickness as shown in the figure. However, since the bent member 100 according to the present invention can be variously designed as required, such as a circular shape or a polygonal shape, as will be described later, The first vent body 113 to be formed may be variously modified according to the shape of the first vent body 113.

The convex portion 115 is formed so as to protrude from one side of the first vent body 113. The width and thickness of the convex portion 115 can be varied and modified as necessary. Thus, the entire shape of the first vent body 113 having the convex portion 115 can be configured in a shape similar to a comb. Protrusions 117 may be formed on any one of the convex portions 115 located at both side edges as convex portions 115 of the first vent unit 110. The protrusion 117 can adjust or maintain the gap d between the recess 135 and the protrusion 115 while allowing the first vent unit 110 and the second vent unit 130 to be described later to be engaged with each other. . The role of the projection 117 will be described later in detail. The end of the convex portion 115 of the first vent unit 110 is bent downward to form the third mounting portion 120 as shown in the figure. The third mounting portion 120 is configured to surround the predetermined portion of the assembling portion 150 to be described later and facilitate fixing the first vent unit 110 to the mold. The third mounting portion 120 and the assembling portion 150, And their coupling relationship and role will be described later.

The second vent unit 130 includes a second vent body 133 and a recess 135. The second vent body 133 forms a frame of the second vent unit 130. Basically, both side edges of the block similar in shape to the first vent body 113 extend in the other direction, So that the overall shape is formed in a shape similar to the U shape. The concave portion 135 of the second vent unit 130 is provided with a plurality of ribs 136 having a predetermined width and length on the inside of the extension portion 134 so that the protrusions 136 115 are inserted into the recessed portion 135. [ The second vent unit 130 is provided with a groove 137 to engage with the projection 117 described above.

For example, when protrusions 117 are formed at positions adjacent to the first vent bodies 113 of the convex portions 115 located at both side edges of the first vent unit 110 as shown in the figure, A groove 137 may be formed at a position adjacent to the end of the extension 134 of the second vent unit 130 at a position corresponding to the position of the projection 117. When the first vent unit 110 and the second vent unit 130 are coupled to each other, the projection 117 and the groove 137 are engaged with each other to fix the recess 135 and the convex portion 115 so as not to flow . Although not shown in the drawings, when the positions of the position fixing portions (the protrusions 117 and the groove portions 137) are the same and the width of the convex portions 115 is made small when the size of the concave portions 135 is constant, The protrusion 117 and the groove 137 can control the gap d between the recess 135 and the protrusion 115 because the width of the gap d between the protrusion 117 and the protrusion 115 is different from the width of the gap d between the protrusion 117 and the protrusion 115, You can also play the role of.

However, the shape and position of the projection 117 and the groove 137 described above are examples of preferred embodiments of the present invention. The first vent unit 110 and the second vent unit 130 can be fixed at a fixed position It is needless to say that the position and shape of the protrusion 117 and the groove 137 can be applied by various known methods.

Meanwhile, the second mounting unit 140 may be formed on both sides of the lower portion of the second vent unit 130 along the longitudinal direction. The second mounting portion 140 has a shape corresponding to the first mounting portion 160 of the assembly portion 150 to be described later and when the assembly portion 150 is coupled to the second mounting portion 140, A mechanism for preventing the second vent unit 130 and the assembly unit 150 from being separated in the vertical direction is formed. The assembly portion 150, the first mounting portion 160, and the second mounting portion 140 will be described later in detail.

The assembly unit 150 serves to attach the vent member 100 according to the present invention to the mold and is formed of blocks each having a size corresponding to the longitudinal direction of the vent units 110 and 130. The first mounting portions 160 are formed on both sides of the assembly portion 150 in the longitudinal direction so that they can flow in the longitudinal direction but can not flow in the vertical direction when the corresponding members are coupled . For example, as shown in the figure, the assembly part 150 may have a stepped shape in which the upper part in the longitudinal direction of the hexahedral block is thick and the lower part is narrow in width. The second mounting portion 140 formed at the lower portion of the second vent unit 130 is formed such that the lower portion thereof protrudes inward to correspond to a narrow portion of the assembly portion 150, The second vent unit 130 may be inserted into the second vent unit 130 while being inserted into the second vent unit 130 in a longitudinal direction. When the assembly unit 150 and the second vent unit 130 are coupled with each other in the above-described structure, the assembly unit 150 and the second vent unit 130 can flow in the longitudinal direction, Structure. However, the structure as described above is an example of the present invention. As long as the first and second mounting portions 160 and 140 are coupled to each other so as not to vertically flow, various known structures can be applied. Needless to say, it is also possible to additionally provide a fixing means for preventing the assembling unit 150 from flowing in the longitudinal direction with respect to the vent units 110 and 130.

The lower end of the convex portion 115 is formed in a shape similar to one side of the second mounting portion 140 as described above and the first vent unit 110 And the second vent unit 130 are coupled to each other, the assembly unit 150 is coupled to the lower portion of the vent members 110 and 130. [

FIG. 3 is a view showing the use state of the injection molding vent member according to the present invention. FIG.

Referring to FIGS. 1 to 3, the venting member 100 for injection molding according to the present invention is configured such that when a necessary portion of the injection-molding mold 170, that is, the molten metal liquid is injected into the mold, It is used by attaching to a part that can not get out. The vent member 100 is fixed to the mold while a fixing means such as a bolt 175 is inserted into the assembled seating surface 155 of the assembly unit 150 described above.

The first and second ventilation units 110 and 130 are connected to the first and second mounting units 120 and 140 of the assembly unit 150 in a state where the first vent unit 110 and the second vent unit 130 are coupled to each other. ). When the molten metal liquid is injected into the internal space of the mold with the vent member 100 in the region where the air is weak as described above, the recess 135 of the first vent unit 110 and the second vent unit 130, The air inside the mold is discharged to the gap d between the molds 115. At this time, the gap d between the concave portion 135 and the convex portion 115 can be variously adjusted by adjusting the size of the convex portion 115.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

100: Vent member 110: First vent unit
113: first vent body 115:
117: projection 120: third mounting portion
130: Second vent unit 133: Second vent body
134: extension part 135:
136: rib 137: groove
140: second mounting portion 150:
155: assembly seating surface 160: third mounting portion

Claims (4)

1. A vent member mounted for ejecting air inside a mold in injection molding,
A first vent unit and a first vent unit having a plurality of convex portions formed on one side of the first vent body; And
A second vent unit and a second vent unit having a concave part that can be engaged while the convex part is inserted into the other side of the second vent body;
Wherein the venting member is formed of a resin.
The method according to claim 1,
The vent member may further include a position fixing portion,
Wherein when the first vent unit is coupled to the second vent unit, the protrusion or the groove is formed in a portion corresponding to the protrusion or the groove, Wherein when the first vent unit and the second vent unit are coupled to each other, the protrusion and the groove are engaged while being engaged with each other.
The method according to claim 1 or 2,
The second vent unit further includes an assembling part at a lower portion thereof,
A first mounting portion is formed on both longitudinal sides of the assembly portion and a second mounting portion having a shape corresponding to the first mounting portion is formed on both lower sides of the second vent unit,
And an assembled seat surface is formed in the inside of the assembly section so as to penetrate in the vertical direction.
The method of claim 3,
And a third mounting portion is further formed at an end of the convex portion of the first vent unit.

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