KR102151350B1 - Mold apparatus for insert injection molding - Google Patents

Abstract

The present invention relates to a mold device for producing an insert molded product through injection molding after seating an insert part made of a steel material in a mold, and to an insert injection molding mold device for producing an insert molded product through injecting a molten resin onto one side of an insert member after seating the insert member in the mold device comprising an upper mold and a lower mold. At least one insert core mold supporting upper and lower portions of the insert member is provided in the mold device, wherein the insert core mold comprises: a slide core type which advances and retreats a predetermined distance in the front and rear directions in response to opening and closing of the mold device; and a buffer core type which elastically supports a trim line of the insert member, thereby protecting a painted surface of the insert member as well as preventing molding defects caused by dispersion of tolerances of the insert member.

Description

Insert injection molding mold equipment {MOLD APPARATUS FOR INSERT INJECTION MOLDING}

The present invention relates to a mold apparatus for manufacturing an insert molded article through injection molding after seating an insert part made of steel material in a mold, and more specifically, a slide movement and buffer function By installing the provided insert core mold along the circumference of the insert member, it relates to an insert injection molding mold apparatus capable of preventing insert molding defects due to deformation or shape error of the insert member as well as protecting the painted surface of the insert member.

In general, in insert injection molding, a predetermined insert member is installed in an injection molding mold apparatus in advance, and then a molten resin is injected into the insert member to produce an insert molded article as a final product.

That is, in such insert injection molding, after first opening the mold device (mold opening), then placing the insert member in the mold device, closing the mold again (mold closing), and then part or all of the insert member in a state where airtightness is maintained. As one of the injection molding methods for producing an insert-molded product in which the insert member and the molten resin are integrated by injecting molten resin onto the surface, it is a technology that is widely used in manufacturing industrial parts such as building materials or automobiles as well as electric and electronic products. .

Since such insert-molded products can be molded as an integrated product by a combination of different materials, optimized structural characteristics can be obtained, as well as excellent physical properties and various functions with high precision and almost no separation or dropout. Can be secured.

Therefore, insert injection molding is from simple fastening member insert molding that makes plastic injection molded products by inserting metal bolts or nuts as the insert member, and part or all of the surface of electrical and electronic parts or steel products. It is used in a variety of ways up to the production of complex insert molded products covering the material.

Hereinafter, the basic structure of the insert injection molding mold apparatus will be briefly described as follows.

Typically, the mold apparatus is composed of a fixed mold and a movable mold, and the movable mold is installed to be combined with or separated from the fixed mold by moving by a transfer cylinder rod.

Therefore, in the insert injection molding, after mounting and fixing the insert member in advance in a movable mold or a fixed mold in which an insert shape corresponding to the shape of the insert member is formed, the movable mold and the fixed mold are combined, and the mold is By injecting a molten resin into the insert-shaped portion while maintaining the fastening force, an insert molded article in which the insert member and the molten resin are integrated is manufactured.

In recent years, as more and more advanced exterior features as well as excellent functionality and safety are required, especially for vehicle body parts or interior materials such as automobiles, insert-molded products using insert members made of steel materials having various shapes are being manufactured.

However, as the shape of the insert member becomes complicated and large, as well as processing such as painting or welding is added, a lot of insert molding defects occur due to deformation or warpage of the insert member, or shape error or tolerance. There was this.

For example, the insert member 500 shown in FIG. 1 is one of a support bracket made of a steel material applied to a vehicle body, and is not only a large size, but also a complex structure .

Here, FIG. 1 shows a photograph of a plane and a rear surface of an insert member used for insert injection molding.

The insert member 500 shown in FIG. 1 has a complex structure and a large surface area, as shown, as well as having a curved surface 525 along the circumference, as well as coating the entire surface. As a result, the molten resin is injected into only the rear surface 540 to perform insert molding.

As described above, insert injection molding, which has a complicated structure and shape, and covers a part of an insert member that has been painted on its surface, has the following problems.

First, since the surface to which the molten resin is not covered is large, after injection molding, the insert member adheres to the mold, thereby causing a problem in that the insert member is detached from the mold.

Second, since the curved surface is formed along the circumference, there is a problem that the painted surface is damaged due to excessive contact with the mold.

Third, due to the characteristics of the steel material, insert molding due to the occurrence of deformation or warpage due to welding processing to complement the product structure, as well as differences in shape due to processing errors or dimensional errors due to press processing of the insert member. There was a problem that defects occurred.

The present invention was conceived to solve the above problems, and an object of the present invention is to arrange a slide core type capable of sliding along the curved surface of the insert member, thereby coating the coating surface due to excessive bonding between the painting surface and the mold. This is to prevent cotton damage.

Another object of the present invention is to compensate for the dimensional error of the insert member as well as the shape error due to deformation or bending by arranging a plurality of buffer core types that support the trim line forming the edge of the insert member. It is to block the occurrence of molding defects.

Another object of the present invention is to prevent the adhesion of the insert member to the mold due to the increase in the surface area due to the enlargement of the insert member by allowing the slide core mold to advance and retreat in response to the mold opening and closing of the mold device. will be.

In order to achieve the above object, the present invention is to produce an insert molded article by injecting a molten resin onto one side of the insert member after placing an insert member having a predetermined curved surface along the periphery in a mold device consisting of an upper mold and a lower mold. In the insert injection molding mold apparatus, provided in the mold apparatus at least one insert core mold installed along the curved surface of the insert member and supporting upper and lower portions of the insert member, wherein the insert core mold is , In contact with the curved surface of the insert member, and corresponding to the mold opening and closing of the mold device, a slide core type provided to advance and retreat a predetermined distance in the mold opening and closing direction, and a position facing the slide core mold In addition to being installed in, it is characterized in that it is configured in a buffer core type elastically supporting the trim line 527 (trim line) of the insert member.

Here, the slide core type includes a slide core type body through which a slide hole is formed, and is inserted into the slide hole to be coupled to the main body of the mold apparatus, and the slide core type body is provided to slide within a predetermined distance. It may be composed of a guide pin, and a spring coupled to the guide pin to elastically support the slide core-type body.

In this case, the slide hole may have a large diameter portion and a small diameter portion, and the body portion of the guide pin may pass through the small diameter portion to allow the slide to move.

In addition, the slide ball and the guide pin is preferably installed to be inclined at a certain angle.

In addition, the guide pins may be provided in plurality by being spaced apart from the slide core type body.

On the other hand, the buffer core type is provided between the buffer core type main body supporting a lower surface of the trim line of the insert member, and the buffer core type main body and the main body of the mold apparatus, and elastically supports the buffer core type main body. It may be composed of an elastic support, and a fixing pin that penetrates the buffer core-type body and the elastic support and is coupled to the main body of the mold apparatus.

In this case, the elastic support is preferably made of urethane rubber.

As described above, the present invention has the following effects.

First, by preventing damage to the painted surface of the insert member, there is an effect of improving the reliability and marketability of the insert molded product.

Second, there is an effect of improving work efficiency and productivity by preventing the insert member from sticking to the mold.

Second, the injection molding can be performed by compensating for the dimensional error of the insert member or the difference in shape due to deformation or warping, thereby preventing not only molding defects, but also improving the precision of the insert molded product. have.

1 is a plan view and a rear photo of an example of an insert member applied to the insert injection molding mold apparatus of the present invention.
FIG. 2 is a side view of the insert injection molding mold apparatus showing a cross section of “AA” of FIG. 1 and a cross section of an arm portion in a state in which the insert member shown in FIG. 1 is seated in the insert injection molding mold apparatus of the present invention. It is an assembly drawing.
Fig. 3 is a front assembly view of the insert injection molding mold apparatus showing a cross-sectional portion of "BB" of Fig. 1 in a state in which the insert member shown in Fig. 1 is seated on the insert injection molding mold apparatus of the present invention.
Fig. 4 is a plan view of an upper die of an insert injection molding mold apparatus according to the present invention.
5 is a plan view of a lower mold assembly surface of an insert injection molding mold apparatus according to the present invention.
6 is an enlarged view of a left sectional portion in FIG. 3.
Fig. 7 is an enlarged view of a right sectional portion in Fig. 3.
Fig. 8 is a view showing an operation state of the slide core type in a state in which mold opening is made in Fig. 6.

Hereinafter, an embodiment of an insert injection molding mold apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 8.

First, an insert member applied to the insert injection molding mold apparatus according to the present invention will be briefly described with reference to FIG. 1.

Here, FIG. 1 shows a plan view and a rear photo of an example of an insert member applied to the insert injection molding mold apparatus of the present invention.

The insert member 500 shown in FIG. 1 is one of a support bracket made of a steel material applied to a vehicle body, and as shown, a head portion 510 having a through hole and the head portion It consists of an arm part 520 that splits and extends in a "U" shape from 510.

At this time, the head part 510 is a part into which a separate fastener 570 (refer to FIG. 2) is inserted during the insert injection molding process, and the arm part 520 has a “C”-shaped cross-section formed with a predetermined depth. In addition, a circular tube 550 is formed at the front end.

In addition, the insert member 500 is painted for rust prevention on the entire surface 530 and the rear surface 540, similar to a conventional steel vehicle body part.

On the other hand, in the injection molding by the insert injection molding mold apparatus of the present invention, the head portion 510 of the insert member 500 shown in FIG. 1, the rear surface 540 of the arm portion 520, and the arm portion 520 ) And the tube body 550 is to be coated by injection of a molten resin with a predetermined thickness only at the connection portion (see FIGS. 2 and 3).

Therefore, the surface 530 of the arm 520 of the insert member 500 and a part of the tube 550 are non-injection surfaces that are not covered with molten resin, and the painted surface is maintained in the insert molded product after insert injection molding is completed. This is the part.

Hereinafter, an embodiment of an insert injection molding mold apparatus according to the present invention will be described in detail with reference to FIGS. 2 to 8.

First, the entire configuration of the insert injection molding mold apparatus according to the present invention will be described in detail with reference to FIGS. 2 to 5.

Here, FIG. 2 is an insert injection molding mold apparatus showing a cross section of "AA" of FIG. 1 and a cross section of an arm portion in a state in which the insert member shown in FIG. 1 is seated in the insert injection molding mold apparatus of the present invention. Fig. 3 is an insert injection molding showing a cross-sectional view of "BB" of Fig. 1 in a state in which the insert member shown in Fig. 1 is seated in the insert injection molding mold apparatus of the present invention. It shows the front assembly view of the mold apparatus.

In addition, FIG. 4 is a plan view of an upper mold assembly surface of an insert injection molding mold apparatus according to the present invention, and FIG. 5 is a plan view of a lower mold assembly surface of the insert injection molding mold apparatus according to the present invention.

As shown in Figs. 2 and 3, the insert injection molding mold apparatus of the present invention consists of an upper mold (upper mold) 100 and a lower mold (lower mold) 200, and the upper mold 100 and the lower mold 200 are The insert core mold 300 is installed on the insert member 500 positioned on the coalescence surface to be merged.

On the other hand, the insert injection molding operation according to the present invention, as shown in Figure 2, injection in a state in which a separate fastener 570 is additionally inserted into the head 510 of the insert member 500 The molding operation is carried out.

In addition, in the insert injection molding mold apparatus of the present invention, a molten resin is injected into only a part of the head portion 510 of the insert member 500, the rear surface 540 of the arm portion 520, and the tube body 550 to form an insert. Since the parts 400 and 420 are formed, the gates 112 and 113 for injecting molten resin are connected to the head 510 and the arm 520 of the insert member 500, respectively, as shown in FIG. It is installed as much as possible.

On the other hand, the insert injection molding mold apparatus of the present invention consists of a vertical injection-type structure in which the upper mold 100 and the lower mold 200 are arranged in the vertical direction, and the mold opening (mold opening) and the mold closing (mold closing) are vertical. have.

At this time, the upper mold 100 is a fixed mold, and the lower mold 200 is a movable mold that is raised and lowered in the vertical direction.

Therefore, in the insert injection molding mold apparatus of the present invention, after the insert member 500 is seated on the lower mold 200 in the mold opening state, the lower mold 200 is raised and incorporated into the upper mold 100, and then the insert You will perform an injection molding operation.

Accordingly, in the insert injection molding mold apparatus of the present invention, the insert member 500 is placed on the insert-shaped portion 215 (see FIG. 5) formed on the upper surface of the lower mold 200 (the coalescence surface to be merged with the upper mold). Since it is seated, since there is no need to fix the insert member 500 using magnetic force, air suction force, or a separate fixture, as in a horizontal injection-type structure in which mold opening and mold closing are performed horizontally, the insert member 500 is mounted. Not only is this simple, it is also possible to simplify the mold structure.

On the other hand, as shown in Figures 4 and 5, on the combined surface of the upper mold 100 and the lower mold 200, the insert shape portion 115 corresponding to the front surface 530 and the rear surface 540 of the insert member 500, Each of the 215 is formed, and the insert member 500 is positioned on the insert-shaped portions 115 and 215.

At this time, in the insert-shaped portion 215 of the lower mold 200, as shown in FIG. 5, a plurality of ribs 216 for improving the flow of the molten resin may be installed.

On the other hand, as shown in Figure 3, the insert core mold 300 located on the union surface of the upper mold 100 and the lower mold 200 is a slide core type (310, 320) and a buffer core type (360, 370). Is composed.

At this time, the slide core types 310 and 320 are installed on the upper mold 100, and the buffer core types 360 and 370 are installed on the lower mold 200.

Therefore, the slide core types 310 and 320 and the buffer core types 360 and 370 are respectively coupled to the upper body 110 and the lower body 210 and installed so as to face each other in the up and down directions, whereby mold closing is achieved. When it comes to bonding, they come into close contact with each other.

On the other hand, in the insert injection molding mold apparatus of the present invention, a detailed coupling and fixing structure of the upper body 110 and the lower body 210, a gate device, a cooling line for cooling the mold, Configurations such as a guide pin, a gas releasing line, and a push pin (ejector pin) can be applied to a conventional configuration used in a general injection molding mold, and thus a detailed description thereof will be omitted.

Hereinafter, the arrangement structure of the slide core types 310 and 320 and the buffer core types 360 and 370 will be described in detail with reference to FIGS. 4 and 5.

First, the slide core types 310 and 320 are disposed on the upper side of the insert member 500, as shown in FIG. 3, and are coupled to the upper body 110, as shown in FIG. 4, A plurality of insert members are disposed along the insert shape 115 on which the surface 530 (see FIG. 1) of the arm 520 of the insert member 500 is seated.

At this time, the outer slide core type 310 is provided with four of each of two on the left and right along the outer circumference of the insert-shaped portion 115, and the inner slide core type 320 is the inner side of the insert-shaped portion 115 Two are installed along the perimeter.

That is, the slide core types 310 and 320 are disposed along both sides of the surface 530 of the arm 520 to form the periphery of the insert-shaped portion 115.

However, the slide core types 310 and 320 are not limited to the six arrangement structures as shown, and the number and shape may be variously selected and applied according to the shape and size of the insert member 500. .

In addition, each slide core type (310, 320), as shown in Figure 4, guide pins (315, 325) are provided in a pair spaced apart a predetermined distance.

On the other hand, the buffer core type (360, 370), as shown in Figure 3, as disposed on the lower side of the insert member 500, is installed in the lower body 210 by fixing pins (363, 373) , As shown in FIG. 5, a plurality of insert members are disposed along the insert shape portion 215 on which the rear surface 540 of the arm portion 520 of the insert member 500 is seated.

At this time, six outer buffer core types 360 are installed along the outer circumference of the insert-shaped part 215, and four inner buffer core types 370 are installed along the inner circumference of the insert-shaped part 215 Has been.

That is, the buffer core types 360 and 370 are arranged along the edges of both sides of the arm portion 520 as shown in FIGS. 3 and 5 to form the edge of the insert-shaped portion 215.

The buffer core type (360, 370) is also limited to the arrangement structure as shown, like the slide core type (310, 320). It is not, and the number and shape may be variously selected and applied according to the shape and size of the insert member 500.

Hereinafter, detailed configurations of the slide core molds 310 and 320 and the buffer core molds 360 and 370 provided in the insert injection molding mold apparatus of the present invention will be described in detail with reference to FIGS. 6 to 8.

Here, FIG. 6 is an enlarged view of the left sectional portion in FIG. 3, FIG. 7 is an enlarged view of the right sectional portion in FIG. 3, and FIG. 8 is It shows the operating state diagram of the slide core type.

First, the slide core types 310 and 320 are installed on the upper body 110 and are provided to contact both sides of the non-injection surface, which is the surface 530 of the insert member 500, respectively.

At this time, the slide core types 310 and 320 are provided to contact each of the curved surfaces 525 formed on both sides of the arm 520 of the insert member 500, as shown in FIG. 6.

Accordingly, the central portion (between the slide core type) of the surface 530 of the arm portion 520 is brought into contact with the upper body 110.

In addition, the slide core molds 310 and 320 are provided so as to advance and retreat a predetermined distance in the mold opening and mold closing directions in the mold apparatus in response to mold opening and mold closing of the mold apparatus.

Since the outer slide core type 310 and the inner slide core type 320 of the insert-shaped portion 115 (see Fig. 4) have the same structure, hereinafter, the right side in Fig. 6, that is, the inner slide core type It will be described based on (320).

The slide core type 320 is composed of a slide core type body 321 and a guide pin 325 and a spring 340.

The slide core-type body 321 is coupled to the upper body 110 and is formed by bending downwardly at an approximately right angle from both sides of the surface 530 of the arm 520 of the insert member 500. ) Is formed to contact the lower one side, and the slide hole 322 is formed through the upper and lower directions.

At this time, the guide pin 325 described below is coupled through the slide hole 322.

Here, the slide hole 322 is a structure in which a large diameter portion in which the head portion 326 of the guide pin 325 is inserted and slides, and a small diameter portion in which the body portion 327 of the guide pin 325 is inserted and slides are connected A spring receiving hole 323 into which the spring 340 is inserted is formed at the upper portion and provided to communicate with each other.

Accordingly, the lower side of the spring 340 is inserted into the spring receiving hole 323, and the upper side is installed so as to be inserted into the upper body 110.

On the other hand, the guide pin 325, as shown, consists of a head portion 326 and a body portion 327, through the slide core type body 321 and the spring 340 to the upper body 110 It is screwed.

Accordingly, the slide core-type body 321 is elastically supported by the spring 340 and is provided so that a small diameter portion can slide along the body portion 327 of the guide pin 325 for a predetermined distance.

At this time, the guide pin 325 and the slide hole 322 are provided so as to be inclined at a certain angle in the inner direction of the surface 530 of the arm 520, so that when the slide core type 320 is operated, the slide core type body Paint damage due to contact between 321 and the curved surfaces 525 on both sides of the arm 520 of the insert member 500 may be prevented.

On the other hand, as shown in FIG. 6, the slide core type 320 is in close contact with the upper surface of the buffer core type 370 in the mold-closed state, so that the slide core type main body 321 moves upward. Since it is pressed and moved upward, the head portion 326 of the guide pin 325 and the lower end portion of the small diameter portion are kept spaced apart by a predetermined distance.

Therefore, the slide core type body 321 is capable of sliding operation by a distance between the head portion 326 of the guide pin 325 and the small diameter portion.

On the other hand, as shown in FIG. 8, in a state in which the upper mold 100 is separated from the lower mold 200 and the mold is opened, the slide core type body 321 does not receive a pressing force from the buffer core type 370. , It maintains the state moved downward by the elastic force of the spring 340.

At this time, the slide core type body 321 slides downward until the lower end of the small diameter portion is in close contact with the head portion 326 of the guide pin 325.

Accordingly, the slide core type main body 321 is provided so as to slide in the up and down directions along the guide pin 325 in response to mold opening and mold closing, as shown in the arrow shown in FIG. 8.

At this time, it is preferable that the slide movement distance of the slide core type main body 321 be approximately 5 mm, but may be appropriately adjusted according to the shape or size of the insert member 500.

Here, it is preferable that a bushing member 330 is installed in the small diameter portion of the slide hole 322 formed in the slide core type body 321 so that the slide operation is smooth.

On the other hand, the buffer core type 370 is installed in the lower type body 210 and is installed at a position facing the slide core type 320 and is a trim that is an end of the curved surface 525 of the insert member 500 It is provided to support a line 527 (trim line).

Here, the buffer core type 370 is composed of a buffer core type body 371, an elastic support 375, and a fixing pin 373.

At this time, since the injection molding part 400 is formed on the rear surface 540 (refer to FIG. 1) of the insert member 500 to be coated with a predetermined thickness by injection of a molten resin, the lower body 210 is shown in FIG. 6, As shown in FIG. 7, it does not contact the rear surface 540 of the insert member 500 and is spaced apart so that the molten resin can be filled.

Here, in the buffer core type body 371, as shown in FIG. 6, one corner of the upper surface is in contact with the lower surface of the trim line 527 of the arm 520 of the insert member 500, and the insert member 500 ) Is provided to support.

Accordingly, the insert member 500 forms a non-injection surface from which molten resin is not injected on the surface 530 and the curved surface 525 where the upper body 110 and the slide core body 321 contact, In addition, a part of the lower end of the trim line 527, which the buffer core type body 371 contacts and supports, also forms a non-injection surface.

On the other hand, the elastic support 375 is to elastically support the buffer core-type body 371, and is preferably formed of urethane (urethane) rubber.

At this time, the urethane rubber is preferably formed to have a thickness of about 10 to 15 mm, but it may be appropriately adjusted and applied according to the shape or size of the insert member 500.

The fixing pin 373 sequentially penetrates the buffer core type body 371 and the elastic support body 375 so that the lower end is screwed to the lower body 210, and the upper end of the head is the buffer core type body 371. It is provided to be located slightly lower than the top surface.

At this time, the buffer core type body 371 is provided so as to be supported by the head of the fixing pin 373.

Therefore, since the buffer core-type body 371 is supported by the elastic support 375, which is urethane rubber, when a pressing force is applied downward from the upper surface, a predetermined distance up and down according to the degree of contraction of the elastic support 375 It is able to move elastically in the direction.

Therefore, the buffer core type 370, even if an error of the trim line 527 occurs due to manufacturing errors or tolerances of the insert member 500, or deformation or bending due to welding, etc., the elasticity of the elastic support 375 This makes it possible to accommodate these changes.

Hereinafter, the operation of the slide core mold 320 and the buffer core mold 370 in the injection molding process using the insert injection molding mold apparatus of the present invention will be described in detail with reference to FIGS. 6 to 8.

First, the slide core types 310 and 320 slide downward by the elastic force of the spring 340 and maintain a state slightly protruding from the upper body 110, as shown in FIG. Is done.

On the other hand, if the insert member 500 is seated on the lower mold 200 and then the upper mold 100 and the lower mold 200 are combined, the slide core main bodies 311 and 321 of the slide core types 310 and 320 are upward. It moves and contacts the curved surface 525 of the insert member 500, and the lower surfaces of the slide core type main bodies 311 and 321 come into close contact with the upper surface of the buffer core type 371.

At this time, the slide core type main body 311, 321 is pushed upward until the upper surface of the slide core type body 311 and 321 is in close contact with the upper type main body 110, since it is subjected to upward pressing force by the buffer core type 370 as mold closing proceeds. You will lose (see Fig. 8).

In addition, when the mold closing is completed, the slide core types 310 and 320 and the buffer core types 360 and 370 face each other at the upper and lower sides of the insert member 500 as shown in FIG. 3. Will come in contact with

At this time, the molten resin is filled in the insert molding portions 400 and 420 formed on the rear surface 540 of the insert member 500 through the gates 112 and 113, thereby performing insert injection molding.

On the other hand, after the insert injection molding is completed, when the mold opening is made, the slide core molds 310 and 320 and the buffer core molds 360 and 370 are separated from each other, and the slide core main bodies 311 and 321 are shown in FIG. As shown, since it slides downward by the elastic force of the spring 340, at this time, by pushing the insert member 500 downward, the insert member 500 can be easily separated from the upper body 110. I can.

Accordingly, the slide core molds 310 and 320 prevent the insert member 500 from being attached to the upper mold 100 during the mold opening process.

That is, when the area of the surface 530 (non-injection surface) on which injection molding is not performed, as in the insert member 500 shown in FIG. 1, is large, the non-injection surface is adhered to the mold during the mold opening process, Although the insert member 500 may not be separated from the mold, the insert injection molding mold apparatus of the present invention prevents this by pushing the insert member 500 in the mold opening process by the slide core molds 310 and 320 You can do it.

Therefore, it is possible to easily separate the non-injection surface of the insert member 500 from the mold, thereby preventing damage to the painted surface, as well as fundamentally blocking the attachment of the upper mold 100 of the insert member 500. do.

In addition, since the buffer core types 360 and 370 elastically support the lower end of the trim line 527 of the insert member 500, the manufacturing error, tolerance, or deformation or warpage of the insert member 500 Even if a change occurs, the buffer core types 360 and 370 compensate for this, thereby preventing insert injection molding defects caused by the dispersion of tolerances of the insert member 500.

As described above, the above embodiments are only described as examples for convenience of description, and thus the claims are not limited, and various modifications may be made within the technical scope of the present invention.

For example, the slide core molds 310 and 320 and the buffer core molds 360 and 370 are in the shape of the surface 530 of the insert member 500, the curved surface 525, the trim line 527, and the like. Correspondingly, various modifications can be applied, and the size, number, and the like are not particularly limited and can be appropriately adjusted.

In addition, the slide core types 310 and 320 and the buffer core types 360 and 370 are not limited to correspond to each other on a one-to-one basis, and any one may correspond to a plurality.

Meanwhile, the slide core types 310 and 320 have been described as having guide pins 325 in a pair, but are not limited thereto, and in consideration of the smooth slide operation of the slide core types 310 and 320, the slide core It can be installed by selecting an appropriate number according to the size or shape of the molds 310 and 320.,

In addition, the cushioning core type (360, 370) also mentioned urethane rubber as the elastic support 375, but it is not particularly limited as long as it is a material that can be applied to the injection environment as a material having elastic force, and a conventional spring is applied. It would also be possible.

Since the insert injection molding mold apparatus of the present invention described above is not limited to the insert injection molding using the insert member of the steel material shown in FIG. 1, it is a mold apparatus that performs injection molding on one surface of the insert member having various shapes. It can be used in various ways.

* Description of the symbols in the drawings *
100: upper type 110: upper type body
112, 113: gate 200: lower hyung
210: lower body 115, 215: insert shape
216: rib 300: insert core type
310, 320: slide core type
312, 322: slide hole 315, 325: guide pin
311, 321: slide core type body
326: head 327: body
323: spring receiving hole 330: bushing member
340: spring 360, 370: buffer core type
363, 373: fixing pin
371: buffer core type body 375: elastic support
400, 420: insert molding part
500: insert member 510: head
520: arm portion 525: curved surface
530: surface 540: back
527: trim line 550: pipe body
570: fastener

Claims (7)

In an insert injection molding mold apparatus for manufacturing an insert molded product by injecting a molten resin to one side of the insert member after placing an insert member having a predetermined curved surface along the periphery in a mold device consisting of an upper mold and a lower mold,
At least one insert core mold installed along the curved surface of the insert member and supporting upper and lower portions of the insert member is provided in the mold apparatus,
The insert core mold,
A slide core type provided in contact with the curved surface of the insert member and corresponding to the mold opening and closing of the mold device, so as to advance and retreat a predetermined distance in the mold opening and closing direction; And
A buffer core type that is installed in close contact with the slide core type and elastically supports the trim line of the insert member;
Insert injection molding mold device, characterized in that consisting of. The method of claim 1,
The slide core type,
A slide core type body through which a slide hole is formed,
A guide pin inserted into the slide hole and coupled to the main body of the mold apparatus, and provided to allow the slide core type main body to slide within a predetermined distance, and
A spring coupled to the guide pin to elastically support the slide core-type body,
Insert injection molding mold device, characterized in that consisting of. The method of claim 2,
The slide hole has a large-diameter portion and a small-diameter portion, and insert injection molding mold apparatus characterized in that the body portion of the guide pin to slide through the small-diameter portion. The method of claim 2,
Insert injection molding mold apparatus, characterized in that the slide ball and the guide pin are installed to be inclined at a certain angle. The method of claim 2,
Insert injection molding mold apparatus, characterized in that the guide pin is provided in a plurality of spaced apart from the slide core type body. The method of claim 1,
The buffer core type,
A buffer core-type main body supporting a lower surface of the trim line of the insert member,
An elastic support provided between the buffer core-type body and the main body of the mold apparatus, and elastically supports the buffer core-type body, and
A fixing pin that penetrates the buffer core-type body and the elastic support and is coupled to the body of the mold device,
Insert injection molding mold device, characterized in that consisting of. The method of claim 6,
Insert injection molding mold apparatus, characterized in that the elastic support is urethane rubber.

Images