KR20230092220A - Insert press molding product and insert press mold apparatus - Google Patents

Abstract

The insert press molded product of the present invention includes a plate portion; A plurality of insert hardware inserted into the plate portion and an insert periphery portion surrounding an outer circumferential surface of the insert hardware, wherein the plate portion covers the head portion of the insert hardware, and the insert hardware includes a plurality of supports protruding from the outer circumferential surface of the body portion. may contain ribs.

Description

Insert press molded product and insert press mold device {INSERT PRESS MOLDING PRODUCT AND INSERT PRESS MOLD APPARATUS}

The present invention relates to an insert press molded article and an insert press mold apparatus.

Insert integral molding is a molding method that integrates heterogeneous or heterogeneous plastic or non-plastic parts (metal, wire, magnet, etc.) in a mold.

In particular, products in which metal and plastic are integrated form the mainstream, which combines the stiffness, conductivity, and surface treatment of metal with the electrical insulation, coloring, flexibility, rigidity, and processability of plastic to create products with very high added value. has the advantage of

The advantages of this integral molding of inserts are that the advantages and disadvantages of each material are complemented by the combination of different materials, so that a reasonable part structure can be obtained. It has the advantage of being able to manufacture highly reliable parts.

As for application fields, it is widely used to make parts for electric and electronic devices, automobiles, precision devices such as watches and cameras, office equipment, and toys.

On the other hand, SMC (Sheet Molding Compound) composite materials are widely used as automobile parts and construction material parts. In particular, the SMC composite material may have an integral structure in which insert hardware including bolts and nuts is inserted for fastening between parts.

It is very important not only to design the hardware insert structure using SMC composite material with appropriate strength, but also to have a mass-productive structure.

However, due to the nature of the SMC composite molding method, press molding is performed in which a lump of SMC (Sheet Molding Compound) is placed between molds without injection and presses the insert hardware and composite material together at high pressure of thousands of tons. In this case, there is a problem in that the insert hardware is out of place or the pin fixing the insert hardware in the mold is broken by high-pressure pressing during press molding, resulting in damage to the mold.

Registered Patent No. 10-1021087

In the present invention, when insert press molding of insert hardware made of a composite material of SMC (Sheet Molding Compound), a plurality of support ribs are protrudingly formed on the outer circumferential surface of the insert hardware to be supported in the insert periphery forming groove of the press mold, thereby preventing the fixing pin from being damaged. It is an object of the present invention to provide an insert press molded article and an insert press mold device in which insert hardware is firmly fixed.

An insert press molded product of the present invention for achieving the above object includes a plate portion; a plurality of insert hardware inserted into the plate portion; and an insert peripheral portion surrounding an outer circumferential surface of the insert hardware, the plate portion covering a head portion of the insert hardware, and the insert hardware may include a plurality of support ribs protruding from the outer circumferential surface of the body portion.

The plurality of insert hardware may be insert press-molded on the lower surface of the plate portion, and the plurality of support ribs may be supported in grooves for forming a peripheral portion of the insert of the press mold.

The plurality of support ribs are formed long in the vertical direction on the outer circumferential surface of the body portion and may be integrally connected to the head portion.

The plurality of support ribs may be formed 3 to 5 at equal intervals on the outer circumferential surface of the body portion.

The head portion may be formed such that a vertex of a regular hexagonal prism is rounded.

The head portion may be formed in a cylindrical shape, and an outer diameter of an outer circumferential contour of the plurality of support ribs may be smaller than an outer diameter of the head portion.

The insert press molded article may be made of SMC (Sheet Molding Compound) composite material except for the insert hardware.

An insert press mold apparatus of the present invention includes a main body plate forming a plate portion of an insert press molded product; an insert periphery forming groove concavely formed in the main body plate to form a periphery of the insert hardware; and an insert fixing pin that protrudes from the insert peripheral portion forming groove and is inserted into the center hole of the insert hardware, wherein the insert peripheral portion forming groove protrudes from the outer circumferential surface of the body portion of the insert hardware to support a plurality of support ribs. there is.

The insert periphery forming groove may further include a connecting rib forming groove connected to another insert peripheral forming groove and a reinforcing rib forming groove extending in a radial direction from the insert peripheral forming groove.

The connection rib forming groove may be formed to have the same depth as the insert peripheral portion forming groove, and the reinforcing rib forming groove may be formed to have a smaller depth than the insert peripheral portion forming groove.

The material to be press-molded in the mold device is preferably a sheet molding compound (SMC) composite material.

According to the insert press molded product and the insert press mold apparatus of the present invention described above, when insert press molding of insert hardware made of a composite material of SMC (Sheet Molding Compound), a plurality of supports supported in the insert periphery forming groove of the press mold on the outer circumferential surface of the insert hardware By protruding the support ribs, the fixing pin can be prevented from being damaged and the insert hardware can be firmly fixed.

1 is a perspective view showing an insert press molded article according to an embodiment of the present invention.
2 is a partial perspective view showing an insert hardware part in an insert press molded product according to an embodiment of the present invention.
3 is a cross-sectional view taken along line III-III of FIG. 2;
4 is a perspective view showing insert hardware according to an embodiment of the present invention.
5 is a perspective view showing insert hardware according to another embodiment of the present invention.
6 is a perspective view showing insert hardware according to another embodiment of the present invention.
7 is a perspective view showing an insert press mold apparatus according to an embodiment of the present invention.
FIG. 8 is a partial perspective view illustrating a portion of a groove for forming a periphery of an insert in FIG. 7 .
9 is a partial perspective view illustrating a state in which insert hardware is disposed in FIG. 8 .
10 is a partial cross-sectional view showing an insert press molded product and an insert hardware part of a mold device.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be exemplified and described in detail in the detailed description. However, it should be understood that this is not intended to limit the present invention to specific embodiments, and includes all transformations, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as 'include' or 'having' are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it should be noted that in the accompanying drawings, the same components are indicated by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, in the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated.

1 is a perspective view showing an insert press molded product according to an embodiment of the present invention, FIG. 2 is a partial perspective view showing an insert hardware part in an insert press molded product according to an embodiment of the present invention, and FIG. 3 is III in FIG. -III is a cross-sectional view, and Figure 4 is a perspective view showing the insert hardware according to an embodiment of the present invention.

1 to 4, an insert press molded product 100 according to an embodiment of the present invention includes a plate portion 110, a plurality of insert hardware 120 inserted into the plate portion, and an outer circumferential surface of the insert hardware. and a wrapping insert periphery 130 .

The plate part 110 may serve to support, for example, a secondary battery or a fuel cell and fix it to a vehicle body. The plate unit 110 may be formed in various shapes according to design specifications, for example, may be formed in a rectangular shape. An opening may be formed in the plate unit 110 . By forming the opening in the plate unit 110, the weight of the battery stack frame can be reduced. When the plate portion 110 is press-molded, a difference in strength may occur due to different material flow between the central portion and the outer portion. According to the present invention, an opening is formed inside the plate portion 110 to reduce a difference in material flow during press molding and thus to have uniform strength.

A plurality of insert hardware 120 may be inserted into the plate unit 110 . A plurality of insert hardware 120 may be disposed at various locations according to required design specifications, and integrally formed with the plate unit 110 . Insert hardware 120 may be formed of a metal material, for example, may be formed of steel or aluminum alloy material. The insert hardware 120 may be a fastening member for mounting a secondary battery or a fuel cell on the plate part 110 or mounting the plate part 110 on a vehicle body, and may be, for example, a nut or a bolt. The insert hardware 120 may be formed in the shape of a cylinder or a hexagonal cylinder.

The insert hardware 120 may be insert press-molded to be exposed on the lower surface of the plate portion 110 . 1 is a view in which a plurality of insert hardware 120 disposed on a plate unit 110 is disposed facing upward, and in this specification, a plurality of insert hardware 120 is directed downward in the plate unit 110 in the vertical direction. It is described based on the original direction in which it is mounted so as to As shown in FIG. 3, the upper end of the insert hardware 120 is covered by the plate portion 110, and the lower end of the insert hardware 120 may be press-formed to be exposed to the lower surface of the plate portion 110. there is.

The insert peripheral portion 130 may be formed to surround an outer circumferential surface of the insert hardware 120 . The drawing shows a case where the insert hardware 120 is a nut. As shown in FIGS. 3 and 4 , the insert hardware 120 may include a head portion 122 , a hollow body portion 124 , and a screw portion 126 formed on an inner circumferential surface of the body portion. The head portion 122 may be formed in a hexagonal shape so that the nut is not rotated by rotational force when the bolt is fastened to the nut. The body portion 124 may be integrally connected to the head portion 122 in the form of a circular pipe having a predetermined thickness and diameter. A central hole 125 blocked by the head 122 may be formed inside the body 124 . A screw thread is formed on the inner circumferential surface of the center hole 125 of the body portion 124 so that a bolt can be fastened thereto. The insert peripheral portion 130 may protrude downward from the lower surface of the plate portion 110 to surround the outer circumferential surface of the body portion 124 of the insert hardware 120 .

In addition, as shown in FIG. 3 , the head part 122 is embedded in the plate part 110 , and the top surface of the head part 122 may be disposed at a higher position than the top surface of the plate part 110 . Accordingly, an insert cover portion 112 protruding upward from the upper surface of the plate portion 110 and covering the head portion 122 may be integrally formed above the head portion 122 .

As shown in FIGS. 2 to 4 , the insert hardware 100 may include a plurality of support ribs 128 protruding from the outer circumferential surface of the body portion 124 . The plurality of support ribs 128 may be supported in the insert periphery forming groove 220 of the press mold 200 (see FIGS. 7 and 8).

4, it is shown by way of example that three support ribs 128 are integrally formed on the outer circumferential surface of the body portion 124 of the insert hardware 100. The cross section of the support rib 128 is formed in a substantially rectangular prism shape, and an outer circumferential surface of the support rib 128 may be formed in a circular arc to correspond to an inner circumferential surface of the insert periphery forming groove 220 . The plurality of support ribs 128 may be supported with their outer circumferential surfaces in contact with the inner circumferential surface of the insert periphery forming groove 220 .

The plurality of support ribs 128 are formed long in the vertical direction on the outer circumferential surface of the body portion 124 and may be integrally connected to the head portion 122 . The support rib 128 is not only integrally connected to the outer circumferential surface of the body portion 124, but also the upper surface of the support rib 128 may be integrally connected to the lower surface of the head portion 122. The outer circumferential contour of the plurality of support ribs 128 may be smaller than or the same as the outer circumferential surface of the head 122 . As shown in FIG. 2 , the width W of the support rib 128 may be similar to the thickness of the peripheral portion 130 of the insert.

5 is a perspective view showing insert hardware according to another embodiment of the present invention, and FIG. 6 is a perspective view showing insert hardware according to another embodiment of the present invention.

The plurality of support ribs 128 may be formed 3 to 5 at equal intervals on the outer circumferential surface of the body portion 124 .

As shown in FIGS. 4 and 5 , three support ribs 128 may be formed at equal intervals on the outer circumferential surface of the body portion 124 . In this case, the support ribs 128 may be disposed at intervals of 120 degrees on the outer circumferential surface of the body portion 124 .

As shown in FIG. 6 (a), four support ribs 128 may be formed at equal intervals on the outer circumferential surface of the body portion 124. In this case, the support ribs 128 may be disposed at intervals of 90 degrees on the outer circumferential surface of the body portion 124 .

As shown in FIG. 6 (b), five support ribs 128 may be formed at equal intervals on the outer circumferential surface of the body portion 124. In this case, the support ribs 128 may be disposed at intervals of 72 degrees on the outer circumferential surface of the body portion 124 .

As shown in FIG. 4 , the head 122 of the insert hardware 120 may be formed such that the vertex of a regular hexagonal prism is rounded. In this case, it is preferable that three are formed at equal intervals on the outer circumferential surface of the body portion 124 . As the head portion 122 is formed in the shape of a regular hexagonal column, rotational resistance of the buried head portion 122 after insert press molding may increase. In addition, as the vertices of the regular hexagonal prisms of the head 122 are formed to be rounded, the concentration of stress on the vertices of the head 122 can be reduced. At this time, the outer surfaces of the three support ribs 128 may be connected to the three side surfaces of the regular hexagonal column of the head portion 122 to form the same plane.

Meanwhile, as shown in FIG. 2 , a connection rib 140 connected to another insert periphery and a reinforcing rib 145 not connected to another insert periphery may be integrally formed on the outer circumferential surface of the insert periphery 130. In FIG. 1, the connection rib 140 and the reinforcing rib 145 are omitted and shown briefly. The connecting rib 140 and the reinforcing rib 145 will be described later in relation to the insert press mold apparatus 200 .

In the insert press molded product 100 of the present invention, since the plurality of support ribs 128 are integrally formed on the outer circumferential surface of the insert hardware 120, when bolts are fastened to the insert hardware 120, the embedded insert periphery 130 It is possible to additionally secure rotational resistance.

As shown in FIGS. 5 and 6 , the head portion 122 is formed in a cylindrical shape, and the outer diameter of the outer circumferential contour of the plurality of support ribs 128 may be smaller than the outer diameter of the head portion 122 .

The head portion 122 is formed to have a larger outer diameter than the circular pipe-shaped body portion 124, and the outer diameter of the outer circumferential contour of the plurality of support ribs 128 may be formed slightly smaller than the outer diameter of the head portion 122. . The outer circumferential surface of the plurality of support ribs 128 may be formed in a circular arc to correspond to the inner circumferential surface of the insert periphery forming groove 220 . The plurality of support ribs 128 may be supported with their outer circumferential surfaces in contact with the inner circumferential surface of the insert periphery forming groove 220 .

The insert press molded product 100 may be made of an SMC composite material except for the insert hardware 120 . SMC (Sheet Molding Compound) composite material is a type of fiber-reinforced plastic composite material. A fiber reinforced plastics (FRP) composite material includes a sheet in which a matrix resin and reinforcing fibers are combined. For example, the sheet may include long fibers as the matrix resin and reinforcing fibers, or may include a fabric woven with continuous fibers as the matrix resin and reinforcing fibers. The fiber-reinforced plastic composite material may include a laminated sheet in which a plurality of such sheets are laminated.

In general, a sheet molding compound (SMC) is an intermediate material processed into a sheet by mixing a thermosetting resin and long fibers (2 to 50 mm), and refers to a fiber-reinforced plastic that is cured through a heat press. In the present invention, the sheet molding compound (SMC) is not limited in the length and type of fibers, and as an intermediate material processed into a sheet form, a fiber-reinforced plastic composite material that can be cured through a heat press is defined as SMC.

That is, in the present invention, the fiber-reinforced plastic composite material may be a sheet molding compound (SMC) that includes reinforcing fibers in a matrix resin and is cured through a heat press.

For example, in the present invention, a fiber-reinforced plastic composite material comprising reinforcing fibers in the form of a fabric woven into continuous fibers or continuous fibers oriented in one direction as reinforcing fibers may be made into an intermediate material in the form of a sheet. can be included

In addition, in the present invention, SMC is not limited by the type of fiber (glass fiber, carbon fiber, aramid fiber, nylon, polypropylene fiber, etc.).

SMC (Sheet Molding Compound) composite material is a mixture of glass fibers, fillers, catalysts, mold release materials, etc. in a resin material, and has excellent moldability, corrosion resistance and weather resistance. In particular, in the case of long fiber SMC, mechanical properties are superior to those of short fiber composite materials, and productivity is higher than that of continuous fiber composite materials. The resin material is a thermosetting resin and may include, for example, unsaturated polyester, epoxy, phenol, and the like. The resin material may be made of one type of thermosetting resin or a plurality of types of thermosetting resins.

According to the insert press molded product according to an embodiment of the present invention, when insert press molding of insert hardware with SMC (Sheet Molding Compound) composite material, a plurality of supports supported in the insert peripheral forming groove of the press mold on the outer circumferential surface of the insert hardware By protruding the rib, the fixing pin can be prevented from being damaged and the insert hardware can be firmly fixed.

In the following, the insert press mold apparatus 200 of the present invention will be described with reference to FIGS. 7 to 10 .

FIG. 7 is a perspective view showing an insert press mold apparatus according to an embodiment of the present invention, FIG. 8 is a partial perspective view showing a portion of an insert periphery forming groove in FIG. 7, and FIG. 9 shows a state in which insert hardware is arranged in FIG. 10 is a partial perspective view showing an insert press molded product and an insert hardware portion of a mold device.

The insert press mold apparatus 200 of the present invention is formed concavely in the main body plate 210 and the main body plate 210 forming the plate portion 110 of the insert press molded product 100, and the periphery of the insert hardware 120 An insert peripheral portion forming groove 220 forming a, an insert fixing pin 230 protruding from the insert peripheral portion forming groove 220 and inserted into the center hole 125 of the insert hardware, the insert peripheral portion forming groove 220 Supports a plurality of support ribs 128 protruding from the outer circumferential surface of the body portion 124 of the insert hardware 100 .

The body plate 210 has a shape corresponding to the plate portion 110, and may have, for example, a rectangular shape.

The insert periphery forming groove 220 may be concavely formed in the body plate 210 to form the insert periphery 130 . The insert periphery forming groove 220 is formed to have a predetermined depth and size, and may be formed to gradually increase in diameter from the bottom to the top. The inner circumferential surface of the insert periphery forming groove 220 is formed to contact the outer circumferential surface of the plurality of support ribs 128 of the insert hardware 120 to support the insert hardware 120 from the outside in the radial direction.

In addition, lower and upper corners of the inner circumferential surface of the insert periphery forming groove 220 may be formed to be rounded, respectively. As a result, the molded insert periphery 130 can increase strength by reducing stress concentration.

As shown in FIG. 8 , the insert fixing pin 230 may be formed in a cylindrical shape at the center of the bottom of the insert periphery forming groove 220 . The insert fixing pin 230 may be integrally formed on the bottom of the insert periphery forming groove 220 . The height of the insert fixing pin 230 may be formed to a height slightly smaller than that of the center hole 125 according to the depth of the center hole 125 of the insert hardware 120 .

The insert periphery forming groove 220 may further include a connecting rib forming groove 240 connected to another insert peripheral forming groove 220 and a reinforcing rib forming groove 245 extending radially from the insert peripheral forming groove. there is. 8 is a partial perspective view showing that two insert peripheral forming grooves 220 are disposed adjacent to each other, and FIG. 9 is a state in which the insert hardware 120 is inserted and mounted into one of the two insert peripheral forming grooves 220. It is a partial perspective view showing .

The connecting rib forming groove 240 is formed so that one to four connecting rib forming grooves 240 communicate with the outer surface of one insert peripheral forming groove 220 according to the arrangement of the plurality of insert peripheral forming grooves 220. It can be. In FIG. 8 , it is illustratively shown that two connecting rib forming grooves 240 are formed to communicate with each other on the outer surface of one insert peripheral forming groove 220 . Accordingly, one or more connecting ribs 140 may be integrally formed in the insert peripheral portion 130 of the insert press molded product 100 .

0 to 3 reinforcing rib forming grooves 245 may be formed to communicate with the outer surface of the insert periphery forming groove 220 according to the number of the connecting rib forming grooves 240 . The connecting rib forming groove 240 is formed to have the same depth as the depth of the insert peripheral forming groove 220, but the reinforcing rib forming groove 245 has a smaller depth than the depth of the insert peripheral forming groove 220 and has a radially outer side. It may be formed to have a depth that gradually decreases as it goes to . Accordingly, the reinforcing rib 145 connected from the lower surface of the plate portion 110 of the insert press molded product 100 to the lower end of the peripheral portion 130 of the insert may be integrally formed.

The connecting rib 140 formed by the connecting rib forming groove 240 and the reinforcing rib 145 formed by the reinforcing rib forming groove 245 can reinforce the insert periphery 130 in the insert press molded product 100. there is.

The material to be press molded in the insert press mold apparatus 200 of the present invention is preferably a SMC (Sheet Molding Compound) composite material. As described above, the SMC composite material is a type of fiber reinforced plastics (FRP) composite material, and includes a sheet in which a matrix resin and reinforcing fibers are composited. The sheet may include long fibers as the matrix resin and reinforcing fibers, or may include a fabric woven with continuous fibers as the matrix resin and reinforcing fibers. The fiber-reinforced plastic composite material may include a laminated sheet in which a plurality of such sheets are laminated. Sheet molding compound (SMC) is an intermediate material processed into a sheet form by mixing a thermosetting resin and long fibers (2 to 50 mm), and refers to a fiber-reinforced plastic that is cured through a heat press, but in the present invention Sheet molding compound (SMC) refers to a fiber-reinforced plastic composite material that is not limited in the length and type of fibers and is an intermediate material processed in the form of a sheet, which can be cured through a heat press.

When insert press molding is performed, heat pressing is performed under a very high pressure of thousands of tons, so there is a concern that the insert fixing pin may be damaged during injection molding. According to the insert press mold apparatus of the present invention, since the plurality of support ribs 128 formed on the outer circumferential surface of the insert hardware 120 are supported in the insert periphery forming groove, it is possible to prevent the insert fixing pin from being damaged during insert press molding. .

In the above, one embodiment of the present invention has been described, but those skilled in the art can add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. Various modifications and changes may be made to the present invention, which will also be included within the scope of the present invention.

100: insert press molded product
110: plate part
112: insert cover part
120: insert hardware
122: head
124: body part
125: center hole
126: screw part
128: support rib
130: insert periphery
140: connecting rib
145: reinforcement rib
200: insert press mold device
210: body plate
220: insert periphery forming groove
230: insert fixing pin
240: connecting rib forming groove
245: reinforcing rib forming groove

Claims (11)

plate part;
a plurality of insert hardware inserted into the plate portion; and
Including an insert periphery surrounding the outer circumferential surface of the insert hardware,
The plate portion covers the head of the insert hardware,
The insert hardware includes a plurality of support ribs protruding from the outer circumferential surface of the body portion. According to claim 1,
The plurality of insert hardware is insert press molded on the lower surface side of the plate portion,
The plurality of support ribs are insert press molded products, characterized in that supported in the insert periphery forming groove of the press mold. According to claim 1,
The plurality of support ribs are formed long in the vertical direction on the outer circumferential surface of the body portion and are integrally connected to the head portion. According to claim 3,
The plurality of support ribs is an insert press molded product, characterized in that 3 to 5 are formed at equal intervals on the outer circumferential surface of the body portion. According to claim 3,
The head portion is an insert press molded product, characterized in that the vertex of the regular hexagonal prism is formed round. According to claim 3,
The insert press molded product, characterized in that the head is formed in a cylindrical shape, and the outer diameter of the outer circumferential contour of the plurality of support ribs is formed smaller than the outer diameter of the head. According to claim 1,
The insert press molded article is an insert press molded article, characterized in that made of SMC (Sheet Molding Compound) composite material except for the insert hardware. A body plate forming a plate portion of an insert press molded product;
an insert periphery forming groove concavely formed in the main body plate to form a periphery of the insert hardware; and
And an insert fixing pin protruding from the insert periphery forming groove and inserted into the center hole of the insert hardware,
The insert press mold device for supporting a plurality of support ribs protruding from the outer circumferential surface of the body of the insert hardware. According to claim 8,
The insert press mold apparatus, characterized in that the insert press mold device further comprises a connecting rib forming groove connected to the other insert peripheral forming groove, and a reinforcing rib forming groove extending in a radial direction from the insert peripheral forming groove. According to claim 9,
The connection rib forming groove is formed to have the same depth as the insert periphery forming groove,
The insert press mold apparatus, characterized in that the reinforcing rib forming groove is formed to have a smaller depth than the insert periphery forming groove. According to claim 8,
The material to be press molded in the mold device is an insert press mold device, characterized in that the SMC (Sheet Molding Compound) composite material.

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