JPH0780863A - Method for molding resin and mold therefor - Google Patents

Abstract

PURPOSE:To cut off the useless portion of net member by a method wherein the cutting blades equipped on a male mold are mated with those equipped on a female mold by mating the male mold with the female mold. CONSTITUTION:Mesh-like net member 32 is placed onto a male mold 20 so as to cover its resin molding part 28. Under the state just mentioned above, a female mold 18 is lowered so as to mate with the male mold 20. By mating the female mold 18 with the male mold 20, the cutting blades 26 on the female mold 18 is mated with the cutting blades 30 on the male mold 20, resulting in cutting of the useless portions 34 of the net member 32. By the cutting-off of the useless portions 34 of the net member 32, only the useless portions 34 fall down and are removed. After that, resin molding material is poured through a bung hole 22 within the resin mold 10 so as to flow in grooves 36, resulting in molding a frame member 14 integral with net 12. Thus, a filter having no useless portion of net thereon can be molded, resulting in making the conventional scissoring of the useless portion of net after the molding of resin and the like unnecessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molding method and a resin molding die for a resin molded product having a mesh net.

[0002]

2. Description of the Related Art Filters (resin molded products) have been used for air conditioning devices and the like for cleaning air.
Is attached. As an example of this filter,
The filter 1 is shown in FIG. The filter 1 includes a mesh-shaped net 2 and a reinforcing member 3 that reinforces the net 2.

First, the molding of the filter 1 as described above is performed.
The net 2 is formed in advance, and the net 2 is inserted into the resin molding die. After that, the resin molding material is poured into the resin molding die to mold the resin molding 4 in which the net 2 and the reinforcing member 3 are integrated as shown in FIG. 7A. Next, since the peripheral portion 5 of the resin molded product 4 is unnecessary, the peripheral portion 5 is cut off by the scissors 6 or the like as shown in FIG. 7B. In this way, the filter 1 in which the net 2 and the reinforcing member 3 are integrated is formed.

[0004]

However, since the filter 1 is formed by cutting the peripheral portion 5 with the scissors 6 or the like, uncut portions are left at the peripheral edge or the peripheral edge becomes wavy. In addition, the resin molding material poured into the resin molding die may protrude to the outside of the peripheral edge, and the peripheral portion 5 may not be cut and removed with scissors 6 or the like. Therefore, the shape of the air conditioning device or the like does not match, and the filter 1 cannot be attached in some cases. Even if it could be attached, it was sometimes unfavorable in appearance.
Further, the work of cutting out the peripheral portion 5 with the scissors 6 or the like is troublesome because it is manually performed. Therefore, the manufacturing cost of the filter 1 is increased.

Therefore, the present inventors have conducted intensive studies to provide a resin molding method and a resin molding die which can solve these problems, and as a result, the present invention has been achieved.

[0006]

The gist of the resin molding method according to the present invention is that a mesh-shaped net member is placed in a resin molding die consisting of a male die and a female die, and then the male die In a resin molding method for molding a resin molded product in which a net and a frame member are integrated by combining a female mold and injecting a resin molding material into the resin molding mold, combining the male mold with the female mold. Thus, the blade portion provided in the male die and the blade portion provided in the female die are engaged with each other to cut an unnecessary portion of the net member.

The gist of the resin molding method according to the present invention is a resin molding die comprising a male mold and a female mold. After a mesh-shaped net member is placed in the resin molding die, By injecting a resin molding material by combining a male mold and a female mold, a resin molding mold for molding a resin molded product in which the net and the frame member are integrated, wherein the male mold and the female mold are provided with a blade portion, When the male die and the female die are fitted together, the blade portion of the male die and the blade portion of the female die are engaged with each other, and an unnecessary portion of the net member is cut.

[0008]

According to the resin molding method of the present invention, the mesh-shaped net member is first placed in the resin molding die. With the mesh-shaped net member being stationary, the male mold and the female mold are combined to form a cavity for injecting the resin molding material to mold the frame member. Here, when the male die and the female die are fitted together, the male blade portion and the female blade portion are engaged with each other, and an unnecessary portion of the net member is cut and removed. After that, a resin molding material is injected into the resin molding die to mold a resin molded product in which the net and the frame member are integrated. Here, since the resin molding material is injected in a state where the male blade portion and the female blade portion are engaged with each other, the resin molding material does not flow out from the resin molding portion, and the peripheral edge is clean. A resin molded product is molded. In this way, after the unnecessary part of the net member is removed, the resin molding material is injected into the resin molding die, so that the unnecessary part of the net is cut with scissors as in the conventional resin molding method. No need.

Further, in the resin molding die according to the present invention, the male die and the female die have the blade portions, and when the male die and the female die are combined, the male die blade portion and the female die blade portion are separated from each other. The mesh members are engaged with each other so that the unnecessary portion of the net member is cut. That is, after the unnecessary portion of the net member is cut, the resin molding material is injected into the resin molding die to mold a resin molded product in which the net and the frame member are integrated. In such a resin molding die, since the resin molding material is injected after removing the unnecessary portion of the net member, it is necessary to cut off the unnecessary portion of the net with scissors after molding as in the conventional resin molding method. Absent.

[0010]

Embodiments of the resin molding method and the resin molding die according to the present invention will now be described in detail with reference to the drawings.

In FIG. 1, reference numeral 10 is a resin molding die of the present invention, which molds a filter (resin molding product) 16 composed of a mesh-shaped net 12 and a frame member 14 for reinforcing the net 12. Is. Resin mold 10
Is composed of a female mold 18 and a male mold 20, and is configured to mold the filter 16 by injecting a resin molding material from the injection hole 22. A blade portion 26 is provided around the resin molding portion 24 of the female die 18. On the other hand, a blade portion 30 that meshes with the blade portion 26 is provided around the resin molding portion 28 of the male die 20. In addition, the resin molding portion 2 of the male mold 20
8 is engraved with a groove 36 into which the resin molding material flows to mold the frame member 14.

In this resin molding die 10, first, as shown in FIG. 1C, a mesh-shaped net member 32 is placed so as to cover the resin molding portion 28 of the male die 20. With the net member 32 fixed on the resin molding portion 28, the female mold 18
Is lowered and fitted to the male mold 20. Here, male 20
By fitting the female die 18 to the blade 2,
6 is meshed with the blade portion 30 of the male die 20, and the net member 3
The unnecessary part 34 of 2 is cut off. By cutting the unnecessary portion 34 of the net member 32, the unnecessary portion 34
Only the chimney falls and is removed.

Thereafter, the resin molding material is injected from the injection hole 22 into the resin molding die 10 and flows into the groove 36 to mold the frame member 14 integrated with the net 12. Here, the resin molding material injected into the resin molding die 10 never flows out from the peripheral wall 25 of the resin molding portion 24 of the female die 18 to the outside. Since the resin molding material does not flow out from the peripheral wall 25 at all, the filter 16 having a clean peripheral edge is molded. Thus, the unnecessary portion 34 of the net member 32 is
After the resin is removed, the resin molding material is injected into the resin molding die 10 to mold the filter 16 without the unnecessary portion 34 of the net member 32.

According to such a resin molding die and resin molding method, after removing the unnecessary portion 34 of the net member 32, a resin molding material is injected into the resin molding die 10 to make the net member 32 unnecessary. The filter 16 without the portion 34 can be molded, and it is not necessary to cut out the unnecessary portion 34 of the net member 32 with scissors or the like after the resin molding as in the conventional case. Further, the resin molding material injected into the resin molding die 10 does not flow out from the peripheral wall 25 of the resin molding portion 24 of the female mold 18 to the outside, and the filter 1 having a clean peripheral edge is provided.
6 can be molded. For this reason, there is no possibility that an uncut portion will occur at the peripheral edge or the peripheral edge will become wavy, which will not fit the shape of the air conditioning device or the like.

Further, according to the resin molding die and the resin molding method as described above, no uncut portion is left at the peripheral edge or the peripheral edge is not wavy, which is preferable in terms of appearance. Further, since it is not necessary to cut off the unnecessary portion 34 with scissors or the like, the manufacturing cost can be reduced.

It is desirable that the resin mold 10 described above be provided with a pad 38 as shown in FIG. The pad 38 is provided in the resin molding portion 24 of the female die 18 so that the net member 32 can be pressed and fixed when the female die 18 is fitted to the male die 20.
By providing such a pad 38, it is possible to prevent the position of the net member 32 from being displaced. Therefore, the net member 32 can be cut into an accurate shape.

Although one embodiment of the resin molding method and the resin molding die according to the present invention has been described above with reference to the drawings, the resin molding method and the resin molding die according to the present invention are limited to the above-mentioned embodiments. is not.

For example, the filter molded by the resin molding method and the resin molding die according to the present invention is not limited to the filter 16 described above, and is a filter (resin molded product) 40 as shown in FIG. Is also good. The filter 40 includes a disc-shaped net 42, a reinforcing member 44 that reinforces the net 42, and a cylindrical member 46.

In the resin molding of the filter 40, first, the substantially disk-shaped net member 48 is placed on the male resin molding portion 50. Next, by fitting the female die to the male die, the blade portion of the female die is aligned with the blade portion of the male die, and the unnecessary portion 52 of the net member 48 placed on the resin molding portion 50 is cut and removed. Be done. After that, a resin molding material is injected into the resin molding die, and the net 42 is integrated into the filter 4
0 is molded. With such a resin molding die and resin molding method as well, it is possible to mold a filter that does not have an unnecessary portion of the net, and there is no need to cut off the unnecessary portion of the net with scissors after resin molding as in the conventional case.

The filter molded by the resin molding method and the resin molding die according to the present invention may be a filter 54 as shown in FIG. The filter 54 has a substantially disk shape as a whole, and a circular hole 56 near the center. The resin molding of the filter 54 is performed by the resin molding die 58 shown in FIG.

The resin molding die 58 is provided with a hole 64 for punching the hole 56 in the resin molding portion 62 of the female die 60.
A blade portion 66 is formed around the circumference 4. On the other hand, male 6
The resin molding portion 70 of No. 8 is provided with a punch portion 72 which is fitted into the hole 64 of the female die 60, and is provided with a blade portion 74 which is engaged with the blade portion 66 around the periphery thereof, so that the hole 56 can be punched. Is being done. Further, the resin molding portion 62 of the female die 60 is provided with a blade portion 80 for cutting the unnecessary portion 78 of the net member 76 and a blade portion (not shown) for dividing the unnecessary portion 78 into four. . On the other hand, male 68
The resin molding portion 70 has a blade portion 82 that meshes with the blade portion 80 of the female die 60, and a blade portion 84 that meshes with a blade portion (not shown) of the female die 60 and divides the unnecessary portion 78 into four. I have it.

In this resin molding die 58, first, a substantially disk-shaped net member 76 is placed on the resin molding portion 70 of the male mold 68. The female die 60 is lowered and fitted to the male die 68 in a state where the net member 76 is placed on the resin molding portion 70 of the male die 68. By fitting the female die 60 to the male die 68, the unnecessary portion 78 of the net member 76 is cut, and
It is divided into four and removed. At the same time, the punch section 72
However, as shown in FIG. 4B, the hole 56 is fitted into the hole 64, the hole 56 is punched out, and the unnecessary portion 86 is removed.

With such a resin molding die 58 as well, after the unnecessary portions 78 and 86 are cut and removed, the resin molding material can be poured in to mold the filter 54. It is not necessary to cut out the portions 78 and 86 with scissors or the like.

Various embodiments of the resin molding method and the resin molding die according to the present invention have been described above with reference to the drawings. However, the resin molding method and the resin molding die according to the present invention are not limited to those shown in the drawings. is not. For example, the shape of the resin molded product to be molded is not particularly limited as long as it is a resin molded product in which the net and the frame member are integrated. Further, the shape of the blade of the resin molding die is not limited to the above-mentioned shape, and may be an acute-angled blade. The blade portion of the resin molding die may be heated so that the net member can be easily cut. In addition, the present invention can be carried out in a mode in which various improvements, modifications and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[0025]

According to the resin molding method of the present invention, after removing the unnecessary portion of the net member, the resin molding material is injected into the resin molding die to obtain a filter having no unnecessary portion of the net member. It can be molded, and it is not necessary to cut off unnecessary portions of the net member with scissors or the like after resin molding as in the conventional case. Further, the resin molding material injected into the resin molding die does not flow out from the peripheral wall of the female resin molding portion to the outside, and a filter having a clean peripheral edge can be molded. For this reason, there is no possibility that an uncut portion will occur at the peripheral edge or the peripheral edge will become wavy, which will not fit the shape of the air conditioning device or the like.

Further, according to the resin molding die and the resin molding method as described above, no uncut portion is left at the peripheral edge or the peripheral edge is not wavy, which is preferable in terms of appearance. Furthermore, since it is not necessary to cut out unnecessary parts with scissors,
It is possible to reduce the manufacturing cost.

According to the resin mold of the present invention,
The male and female dies have blades so that when the male and female dies are fitted together, the male and female dies are engaged with each other so that unnecessary parts of the net member are cut. Therefore, after cutting an unnecessary portion of the net member, a resin molding material can be injected into the resin molding die to form a resin molded product in which the net and the frame member are integrated. Therefore, unlike the conventional case, it is not necessary to cut off unnecessary portions of the net member with scissors after the resin molding.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of a resin molding method and a resin molding die according to the present invention, FIG. 1 (a) is a plan view showing a filter which is a resin molded product, and FIG. ) Is a side view showing the filter, and FIG. 7C is a front sectional view showing the resin molding die.

FIG. 2 is a side sectional view of the resin mold shown in FIG.

3A and 3B are views for explaining another embodiment of the resin molding method and the resin molding die according to the present invention, wherein FIG. 3A is a perspective view for explaining cutting of the net member, and FIG. b) is a perspective view showing a filter which is a resin molded product.

FIG. 4 is a view for explaining still another embodiment of the resin molding method and the resin molding die according to the present invention, wherein FIG. 4 (a) is a perspective view showing a filter which is a resin molded product; b)
FIG. 6 is a perspective view for explaining cutting of the net member.

FIG. 5 is a view for explaining still another embodiment of the resin molding method and the resin molding die according to the present invention, and is a front sectional view showing the resin molding die.

FIG. 6 is a view for explaining a conventional resin molding method and a resin molding die, and is a plan view showing a filter which is a resin molded product.

7A and 7B are views for explaining a resin molding method and a resin molding die for the filter shown in FIG. 6, where FIG. 7A is a plan view and FIG.

[Explanation of symbols]

 10, 58; Resin mold 12, 42; Net 14, 44; Frame member 16, 40, 54; Filter (resin mold) 18, 60; Female mold 20, 68; Male mold 26, 66, 80; Female mold Blades 30, 74, 82, 84; male blades 32, 48, 76; net members 34, 52, 78; unnecessary parts

Claims (2)

[Claims] 1. A mesh-shaped net member is placed in a resin molding die including a male mold and a female mold, the male mold and the female mold are combined, and a resin molding material is injected into the resin molding die. Thus, in the resin molding method of molding a resin molded product in which the net and the frame member are integrated, by combining the male mold and the female mold, the blade portion provided in the male mold and the female mold are provided. Mesh with the blade
A resin molding method comprising cutting an unnecessary portion of the net member. 2. A resin molding die comprising a male mold and a female mold, wherein a mesh-shaped net member is placed in the resin molding mold, and then the resin molding material is poured into the male mold and the female mold together. By doing so, in the resin mold for molding the resin molded product in which the net and the frame member are integrated, the male mold and the female mold are provided with blade portions, and when the male mold and the female mold are aligned, A resin molding die, wherein a male blade portion and the female blade portion are engaged with each other, and an unnecessary portion of the net member is cut.