JPH11156480A - Resin pattern and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin pattern with which a high precise mold and a cast product are obtained by improving the mechanical strength of a metallic plate and firmly fixing the pattern part to the metallic plate, and a manufacturing method thereof. SOLUTION: A negative 5 is arranged to one side of the metallic plate 10 and the resin material is poured into a space 5A in the negative from resin pouring holes 10A, 10B, 10C, 10D, 10E bored on the metallic plate and filled to the resin pouring holes to integrally form the pattern part Mo on the metallic plate. Since the resin pouring holes are partially formed to the pattern part Mo, the mechanical strength of the metallic plate is improved and also the pattern part is held in a state of interposing the metallic plate with the resin forming part formed by pouring the resin pouring holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin model for forming a cavity of an upper mold and a lower mold of a casting mold and a method of manufacturing the same, and more particularly to a method of strengthening a mechanical strength of a metal plate as a substrate. Also, the present invention relates to a device in which the accuracy of a mold and a cast product is improved by reliably integrating a metal plate and a model portion.

[0002]

2. Description of the Related Art Heretofore, there has been provided a resin model in which a model portion is fixed to a metal plate as a resin model for forming a cavity portion of an upper die and a lower die. This is shown in FIGS.
As shown in FIG. 1, a plurality of model parts 5 are formed on a metal plate 1 using one metal plate (flat plate) 1 and a negative 3. The metal plate 1 is
Four holes 1 </ b> A having substantially the same size as the outer shape of the model portion 5 are formed. A groove 2A is formed in the periphery of the hole 1A. Then, as shown in FIGS. 27 and 28, the metal plate 1 is opposed to a separately prepared negative 3 made of gypsum. The negative 3 forms a female mold 3A in its internal space. Then, as shown in FIG. 29, the metal plate 1 (the fixing means is omitted) is placed on the negative 3 with the negative 3 facing down, and the large opening 1A is aligned with the female mold 3A, and the resin material G is injected from here. I do. Thereby, as shown in FIG. 30, the model part 5 is formed in the female mold 3A, and the resin material G is also formed in the hole 1A of the metal plate 1.
And the metal plate 1 and the model part 5 are integrated with each other while being locked in the hole 1A as shown in FIG.

Subsequently, as shown schematically in FIG. 32, the metal plate 1 integrally formed with the resin model 5 is mounted on, for example, a table 7 of a Jolt squeeze molding machine J. The table 7 has a structure in which the air E is supplied to the cylinder 9 and the air E is exhausted H repeatedly so that the table 9 vibrates up and down. And metal plate 1
By placing the metal frame K1 on the upper side, filling the metal frame K1 with the sand S, and vibrating up and down with the stroke L, the sand S is compacted, and then pressed against the squeeze board SB to be pressed and compressed. Thereby, the molds S1 and S2 are formed.

As shown in FIG. 33, the upper mold S2 of the metal frame K2 and the lower mold S1 of the metal frame K1 are put together through the above-mentioned working steps, and the molten metal is poured from the pouring port K3 into the casting space. C is poured to produce a cast product.

[0005]

According to the above-mentioned conventional resin model, a large hole is formed over a large area of the metal plate for injecting the resin material and for holding the resin model. For this reason, the mechanical strength of the metal plate is small, the metal plate is bent and deformed, and a joint is cracked by vertical vibration by a Jolt squeeze molding machine, so that the model part can not be securely held, and metal There is a possibility of displacement from the plate. Therefore, there is a problem that the accuracy of the resin model is reduced, and the accuracy of the mold and the cast product is reduced. In addition, the amount of resin material used increases, and a concave groove is formed in the middle portion of the metal plate in thickness.

[0006] The present invention has been made in view of the above problems, and in particular, while enhancing the mechanical strength of a metal plate serving as a substrate, the metal plate and the model portion are firmly integrated to form a mold and a cast product. It is an object of the present invention to provide a resin model capable of improving accuracy and a method for manufacturing the same. It is another object of the present invention to provide a resin model which has sufficient mechanical strength, uses a small amount of resin, is easy to process, and has a method for manufacturing the same.

[0007]

According to a first aspect of the present invention, there is provided a resin model, comprising: a metal plate; a model portion formed on the metal plate; A resin molded part formed by injecting a resin into the formed resin injection port, wherein the model part and the resin molded part are integrally formed with a metal plate interposed therebetween. It is.

[0008] The resin model according to claim 2 of the present invention comprises:
2. The resin model according to claim 1, wherein the resin injection port has a stepped portion or a tapered portion whose diameter on the resin injection side is enlarged.

The resin model according to the third aspect of the present invention comprises:
The resin model according to claim 1, wherein a concave groove is provided in contact with an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate, and resin is injected into the model portion and the concave portion, thereby forming an outer portion of the model portion. The imposition part is formed integrally with the peripheral edge or the inner peripheral edge.

The resin model according to claim 4 of the present invention comprises:
The resin model according to claim 1, wherein a concave groove extending outward from an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate is provided, and resin is injected into the model portion and the concave groove. An imposition portion is integrally formed on the outer peripheral edge or the inner peripheral edge of the model portion, and a concave R-shaped surface or a linear C surface is formed on a boundary between the metal plate and the outer peripheral edge or the inner peripheral edge of the model portion. Is what you do.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a resin model, wherein a negative is disposed on one side of a metal plate, and a resin material is injected from a resin injection opening formed in the metal plate into a negative internal space. In the method for manufacturing a resin model in which a model portion of a resin material is integrally formed on a metal plate, the resin injection port is partially formed with respect to the model portion, and a resin is injected into the model portion and the resin injection port. A resin molded portion formed by injection is integrally formed with a metal plate sandwiched therebetween.

According to a sixth aspect of the present invention, in the method for manufacturing a resin model according to the fifth aspect, the concave groove is formed in contact with an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate. Forming and injecting a resin material into a negative internal space from a resin injection port opened in the metal plate, filling the concave groove with a resin material, and forming an imposed portion on an outer peripheral edge or an inner peripheral edge of the model portion. It is characterized by the following.

According to a seventh aspect of the present invention, in the method for manufacturing a resin model according to the fifth aspect, the metal plate is formed so as to extend outward from an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate. A concave R groove is formed, and a convex arcuate R surface or a linear C surface is formed at the boundary between the outer peripheral edge or the inner peripheral edge of the negative model portion and the upper surface of the concave groove. While injecting the resin material into the negative inner space, filling the concave groove with the resin material, forming an imposed portion on the outer peripheral edge or the inner peripheral edge of the model portion, and forming the outer peripheral edge or the inner peripheral edge of the metal plate and the model portion. Are formed with a concave arcuate R surface or a linear C surface at the boundary of.

[0014]

According to the first aspect of the present invention, since the resin injection port formed in the metal plate is partially formed in the model portion, the mechanical strength of the metal plate is enhanced and the metal plate is enhanced. Since the resin material is filled in the opened resin injection port, the model portion can be held with the metal plate sandwiched by the resin molded portion formed by injecting the resin into the resin injection port. .

Accordingly, the resin model is prevented from being deformed such as cracks or flexures due to vibration or compression of the metal plate generated when sand is sunk into the model portion on the metal plate by a Jolt squeeze molding machine or the like. High precision molds and cast products are obtained. In addition, the amount of resin used is small, and the processing of the metal plate is easy, since it is only necessary to make holes.

According to the second aspect of the present invention, the resin injection port has a step portion or a tapered portion formed by enlarging the diameter of the resin injection side of the metal plate. The portion is vertically sandwiched by the portions.

Thus, the resin model is prevented from being deformed such as cracks or flexures due to the vibration or compression of the metal plate generated during the work of sanding the metal plate into the model portion by the Jolt squeeze molding machine. The displacement of the model portion in the vertical direction is eliminated, and a high-precision mold and cast product can be obtained.

According to the third aspect of the present invention, a concave groove is provided in contact with an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate, and a resin is injected into the model portion and the concave portion so that the outer portion of the model portion is formed. Since the imposition part is integrally formed on the peripheral edge or the inner peripheral edge, the movement of the model part in the left-right direction is restricted, and the model part is firmly fixed to the metal plate.

Thus, the resin model is prevented from being deformed, such as cracks or flexure, due to the vibration or compression of the metal plate generated during the work of sanding the metal plate into the model portion by the Jolt squeeze molding machine. There is no displacement of the model part in the left-right direction, and a highly accurate mold and cast product can be obtained.

According to the fourth aspect of the present invention, the resin is injected into the model portion and the concave groove, whereby the imposition portion is integrally formed on the outer peripheral edge or the inner peripheral edge of the model portion, and the metal plate and the outer peripheral edge of the model portion are formed. Alternatively, a concave R-shaped surface or a straight C-shaped surface is formed at the boundary with the inner peripheral edge.

[0021] This makes it possible to prevent clogging of the corner of the mold during molding of the mold or prevent the mold from being caught when the mold is removed, thereby preventing the mold from being lost. Can be manufactured.

According to the fifth aspect of the present invention, first, a negative is arranged on one side of the metal plate.
Then, a resin material is injected into the negative internal space from a resin injection port opened in the metal plate, and a model portion of the resin material is integrally formed on the metal plate.

Since the resin injection hole formed in the metal plate is partially formed with respect to the model portion, the mechanical strength of the metal plate is enhanced, and the resin injection hole formed in the metal plate is also formed. The model portion is filled with the resin material, and the model portion is held in a state where the metal plate is sandwiched by the resin molded portion formed by the resin injection port. Thereby, a resin model having high mechanical strength can be easily manufactured.

According to the sixth aspect of the present invention, first, a negative is arranged on one side of the metal plate.
Next, a resin material is injected into the negative internal space from the resin injection port opened in the metal plate. Thus, the resin material is also filled in the concave groove provided in contact with the outer peripheral edge or the inner peripheral edge of the model portion of the metal plate. And the model part is formed integrally with the imposition part, and the movement in the left and right direction is regulated,
It is firmly fixed to the metal plate.

[0025] This prevents deformation such as cracking or bending due to vibration or compression of the metal plate generated during the work of sanding the metal plate into the model portion by the Jolt squeeze molding machine, and also in the left-right direction. It is possible to easily manufacture a resin model capable of manufacturing a high-precision mold and a cast product without any displacement of the model portion.

According to the seventh aspect of the present invention, first, a negative is arranged on one side of the metal plate.
Next, a resin material is injected into the negative internal space from a small resin injection port opened in the metal plate. A concave groove extending outward from the outer peripheral edge or the inner peripheral edge of the model portion of the metal plate is formed, and a convex arcuate R surface or a boundary at the boundary between the outer peripheral edge or the inner peripheral edge of the negative model portion and the upper surface of the concave groove is formed. Since the straight C-plane is formed, an imposition portion is formed on the outer peripheral edge or the inner peripheral edge of the model portion, and a concave arc-shaped R is formed on the boundary between the metal plate and the outer peripheral edge or the inner peripheral edge of the model portion.
A plane or a straight C-plane is formed.

[0027] This makes it possible to prevent clogging of the corner of the mold during molding of the mold or prevent the mold from being caught when the mold is removed, thereby preventing the mold from being lost. A resin model that can be manufactured can be easily manufactured.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a resin model and a method for manufacturing the same according to the present invention will be described below with reference to FIGS. 1 is a perspective view showing the metal plate 10 and the negative 5, FIG. 2 is a bottom view showing a part of the resin model, and FIG. 3 is a sectional view of the same.

In the resin model M of the present invention, an internal space 5A of a separately prepared gypsum negative 5 faces a single metal plate 10 made of iron or aluminum, and the internal space 5A is made of epoxy resin or the like. A plurality of model portions Mo are formed on one side surface of the metal plate 10 by injecting a resin material. The metal plate 10 has four resin models M
5 resin injection ports 10 each at four locations
A, 10B, 10C, 10D, and 10E are opened. As shown in FIG.
It is opened along the inside of the outer peripheral edge m of o. Each of the resin injection ports has such a size that a resin material for molding the model portion Mo can be injected, and is formed partially with respect to the model portion Mo.

Each of the resin injection ports 10A, 10B, 10
Since C, 10D and 10E are partially formed with respect to the model portion Mo, as shown in FIG.
The mechanical strength of 0 is increased. Further, the model portion Mo formed on one side surface of the metal plate 10 is formed by a resin molding portion O formed by filling each resin injection port with a resin material.
It is integrally formed in a sandwiched state. The metal plate 10 and the model portion Mo are fixed by screwing the ends of the bolts B to the female screw N at a plurality of locations and fastening them.

The first embodiment of the present invention is configured as described above, and is manufactured by the manufacturing method shown in FIGS. First, as shown in FIG. 4, a metal plate 10 having a communication hole serving as a predetermined resin injection port and a gypsum negative 5 having a predetermined internal space 5A are separately prepared. Then, as shown in FIG. 5, the metal fittings 11 for fastening are previously arranged in the internal space 5A with the negative 5 facing down. Next, the metal plate 10 is positioned and mounted thereon. Then, the resin injection port 10 of the metal plate 10 is formed.
The resin material G is injected into the internal space 5A of the negative 5 from one or more of A, 10B, 10C, 10D, and 10E, and is filled up to each resin injection port.

As a result, as shown in FIG. 6, the resin material G filled in the internal space 5A of the negative 5 is cured to form the model Mo, and the resin injection ports 10A, 1A are formed.
The resin material G filled up to 0B, 10C, 10D, and 10E is cured to form the resin molded portion O. Next, as shown in FIG. 7, the metal plate 10 is turned over so that the model portion Mo of the resin model M is on the upper side, and the bolts B are tightened to firmly fix the model portion Mo to the metal plate 10.

Subsequently, as shown in FIG.
The metal plate 10 with the "o" facing upward is
It is mounted on the table 13 of the squeeze molding machine J. A metal frame 15 is placed on the metal plate 10 and
7 is filled in the metal frame 15. The table 13 has the cylinder 1
9, the supply of the Jolt air E and the exhaust H are repeated to vibrate up and down with the stroke S, and the sand 17 is compacted in advance. After that, the sand molds 20 and 23 are formed by pressing against the squeeze board SB and compressing.

After the above operation steps, as shown in FIG.
The mold is completed by combining the sand mold 20 of the upper mold 20B and the sand mold 23 of the lower mold 23B, and the molten metal is injected into the mold spaces C1 and C2 from the pouring port 20A to produce a cast product.

According to the resin model M, since the resin injection port formed in the resin model M is partially formed with respect to the model portion Mo, the mechanical strength of the metal plate 10 is enhanced.
Also, since the resin material is filled into the plurality of resin injection ports opened along the inner periphery m of the model portion Mo, the model portion M
o is integrally formed so as to be held by the metal plate 10.
Thereby, even if the table 13 of the Jolt squeeze molding machine J violently vibrates up and down, the resin model M is not displaced, and the metal plate 10 is not deformed such as cracks or flexures. Manufactured. In addition, since the resin injection port is formed in a spot shape, the amount of resin used can be reduced, and the processing of the metal plate 10 can be easily performed because only a through hole is required.

The resin model of the present invention is not limited to the resin model of the first embodiment, but may be the resin model of the second embodiment shown in FIG. This embodiment uses a metal plate 1
0 is a metal plate 10 'having a concave cross-sectional shape in which it is recessed from a flat plate
It is what it was.

By using the metal plate 10 ', the resin injection ports 10A', 1
A resin material is filled from 0B ', 10C', 10D ', and 10E', and is integrally formed in a concave cross section 10A 'in which the model section Mo' is recessed. As a result, the model portion Mo 'is
It is integrally formed on one side of the metal plate 10 'without protruding from 0'.

According to the resin model of the second embodiment, the following effects are obtained. First, the same effect as the resin model of the first embodiment can be obtained. Also, the model part Mo '
Can be divided at arbitrary height positions, and even a model having a height difference can be integrally formed on one side surface of the metal plate 10 ′ without projecting from the metal plate 10 ′.

The resin model of the present invention is shown in FIGS.
The resin model of the third embodiment shown in FIG. In the third embodiment, first, similarly to the first embodiment, the internal space 5A of the negative 5 made of gypsum separately prepared faces the metal plate 10, and a resin material is injected into the internal space 5A. A plurality of resin models M are provided on one side of the metal plate 10.
To manufacture. The metal plate 10 has five resin inlets 10A, 10B, along the inner periphery m of the model Mo.
10C, 10D and 10E are opened. Each of the resin injection ports has such a size that a resin material for molding the model portion Mo can be injected, and is formed partially with respect to the model portion Mo.

The model M in the metal plate 10
A concave groove 10K is provided all around the outer peripheral edge m of o.
The concave groove 10K has a concave cross section, and is communicated over five resin injection ports 10A, 10B, 10C, 10D, and 10E. In addition, as shown in FIG. 13, the outer peripheral edge of the concave groove 10K is flush with the outer peripheral edge m of the model portion Mo. Then, a resin material is injected into the internal space 5A of the negative 5 to form a plurality of model portions Mo on one side surface of the metal plate 10, and the resin material is also injected into the concave groove 10K, so that the outside of the model portion Mo is formed. An imposed portion (excess portion) P is integrally formed on the peripheral edge or the inner peripheral edge. The concave groove 10K is not limited to the entire circumference of the outer peripheral edge m of the model portion Mo, and may be provided in a part thereof. Other configurations are the same as those of the first embodiment, and description thereof will be omitted.

The resin model M of the third embodiment is manufactured by the following manufacturing method. First, as shown in FIG.
A metal plate 10 having a predetermined resin injection port and a concave groove 10K and a gypsum negative 5 having a predetermined internal space 5A are separately prepared. Note that, similarly to the first embodiment, a metal fitting for fastening is arranged in the internal space 5A. Subsequently, the negative 5 is arranged on one side of the metal plate 10.

Next, the resin material is injected into the negative 5 through the resin injection ports 10A, 10B and the like opened in the metal plate 10.
Inject into the interior space. As a result, the resin material is filled in the concave portion 10K provided on the entire portion or a part of the model portion Mo and its outer periphery. Thereafter, the model portion Mo and the imposition portion (excess portion) P are integrally formed by curing the resin material. Hereinafter, similarly to the first embodiment, the model portion Mo is fixed to the metal plate 10 by the bolt B, and subsequently, the model portion Mo is fixed.
Is formed using a metal plate 10 integrally formed with a Jolt squeeze molding machine or the like. And
Cast products are manufactured using the upper and lower molds.

According to the resin model of the third embodiment, the following effects are obtained. First, the same effect as the resin model of the first embodiment can be obtained. Further, the concave groove 10K is in contact with the outer peripheral edge or the inner peripheral edge of the model portion of the metal plate.
Is provided, and by imposing a resin into the model portion and the concave groove, the imposition portion P is integrally formed on the outer peripheral edge or the inner peripheral edge of the model portion, so that the movement of the model portion Mo in the left-right direction is restricted. , Is firmly fixed to the metal plate 10.

Therefore, even if the bolt B is loosened due to vibration or the like, the resin model is cracked by vibration or compression of the metal plate generated during the work of sanding the metal plate into the model portion by the Jolt squeeze molding machine. In addition to preventing deformation such as deformation and bending, the displacement of the model portion in the left-right direction is eliminated, and a highly accurate mold and cast product can be obtained.

The resin model of the present invention is shown in FIGS.
The resin model of the fourth embodiment shown in FIG. In the fourth embodiment, first, similarly to the first embodiment, the inner space 5A of the separately prepared negative 5 made of gypsum faces the metal plate 10, and a resin material is injected into the inner space 5A. A plurality of resin models M are provided on one side of the metal plate 10.
In order to manufacture the five resin injection ports 10A, 10B, 10C, 10D, 1 along the outer periphery m of the model portion Mo.
0E is open. Each of the resin inlets is a model M
It has a size such that a resin material for molding o can be injected and is partially formed with respect to the model portion Mo.

A concave groove 10K is formed on the entire outer periphery of the outer periphery m of the model Mo formed on the metal plate 10 so as to extend outside the outer periphery of the model. The concave groove 10K has a concave cross section, and has five resin injection ports 10A, 10A.
B, 10C, 10D, and 10E. As shown in FIG. 18, a resin is injected into the concave groove 10K in the space inside the negative 5 to form an imposition portion P, and a concave arc R is formed at the boundary between the metal plate 10 and the outer peripheral edge m of the model portion Mo. A surface m1 (may be a linear C-plane) is formed.

As shown in FIG. 17, a convex arcuate R surface 5D is formed at the boundary 5C between the negative internal space and the concave groove 10K, and the resin material is injected into the negative internal space to form the concave 10K. Is filled with a resin material.
o and the imposition portion P are integrally formed of a resin material, and a concave R-shaped surface m1 (or a linear C-surface) may be formed at the boundary between the metal plate 10 and the outer peripheral edge m of the model portion Mo.

The model portion Mo and the metal plate 10 are connected to each other, as shown in FIG.
With o as the upper side, through holes are drilled in the four metal fittings 11 for embedding, female screws N are machined in the metal plate 10, bolts B are inserted into the metal fittings 11, and bolt ends are screwed into the female screws N. The model part Mo is fixed to the metal plate 10.

In another embodiment, as shown in FIG. 16, four embedding metal fittings 11 are arranged on one side of a metal plate 10 and the leading ends of bolts B which penetrate the metal plate 10 from the back side thereof. After that, a negative may be arranged on the side where the metal fitting 11 is located, and a resin material may be injected to integrally form the model portion Mo.

Next, the resin model M according to the fourth embodiment of the present invention will be described.
Will be described. First, as shown in FIG. 14, a metal plate 10 having predetermined resin injection ports 10A, 10B and the like and a concave groove 10K and a negative 5 having a predetermined internal space are separately prepared. , A negative 5 is arranged on one side thereof. At this time,
As shown in FIG. 17, a convex arcuate R surface 5D (or a linear C surface) may be formed on the negative 5 at a boundary 5C between the outer peripheral edge of the negative model and the upper surface of the concave groove 10K.

Subsequently, a resin material is injected into the negative internal space from the resin injection ports 10A, 10B and the like opened in the metal plate 10. As a result, as shown in FIG. 18, since the concave groove 10K is formed to extend outside the outer peripheral edge m of the model portion Mo in the metal plate 10, the model portion Mo and the imposition portion are integrally formed by the resin material. The model Mo
At the boundary between the outer peripheral edge m and the concave groove 10K,
Is formed.

Hereinafter, similarly to the first embodiment, the model Mo is fixed to the metal plate 10 with the bolt B, and subsequently, the metal plate 10 integrally formed with the model Mo is used to form a joint. -Form a mold with a squeeze molding machine or the like. Finally, a cast product is manufactured using the upper and lower molds.

According to the resin model M of the fourth embodiment,
The following effects are obtained. First, the same effects as in the first embodiment can be obtained. Further, since the concave R-shaped surface is formed at the boundary between the metal plate and the outer peripheral edge of the model portion, the clogging of the corner of the mold is good during molding of the mold, and the model portion is not caught when the mold is removed. By doing so, the lack of the mold can be prevented. Thereby, a high-precision resin model can be formed, and a high-quality cast product can be produced using the resin model.

The present invention is not limited to the above embodiments, and design changes can be made within the gist of the invention. For example, the number and the shape of the model portions Mo formed on the metal plate 10 are arbitrary, and the type and presence or absence of the fixing means are also arbitrary.

FIGS. 19 and 20 show the resin model of the present invention.
The resin model of the fifth embodiment shown in FIG. This fifth
The embodiment is a modification of the third embodiment, and includes a model Mo.
The three resin injection ports 10F are formed by intersecting the outer peripheral edge m portions of. The other configuration is the same as that of the third embodiment, and the description is omitted. The arrangement and number of the resin injection ports are arbitrary.

The resin model of the present invention is shown in FIGS.
The resin model of the sixth embodiment shown in FIG. This sixth
In the embodiment, the model portion Mo is an annular body, and the outer peripheral edge m2 and the inner peripheral edge m3 of the model portion Mo intersect to form a 2
One resin injection port 10G is formed. In this case, the groove 10K is provided on both sides of the outer peripheral edge m2 and the inner peripheral edge m3 of the model portion Mo to form the imposition portion P. The other configuration is the same as that of the third embodiment, and the description is omitted. As described above, the present invention can be implemented regardless of the size and the shape of the model Mo.

The resin model of the present invention is shown in FIGS.
The resin model of the seventh embodiment shown in FIG. This seventh
In the embodiment, one resin injection port 10G is formed inside the outer edge of the model portion Mo. In this case, the step 10I is formed by enlarging the diameter of the resin injection side of the resin injection port 10G. With this configuration, it is possible to hold the metal plate 10 between the model portion Mo and the resin molded portion O without displacement in the vertical direction. The other configuration is the same as that of the third embodiment, and the description is omitted.

FIGS. 25 and 26 show the resin model of the present invention.
The resin model of the eighth embodiment shown in FIG. This 8th
The embodiment is an example of making a cast product having a hollow portion, and corresponds to a virtual shape portion Q that makes a hollow portion,
A skirting board R is formed above the model Mo. As described above, the model portion Mo is not limited to the product shape portion, and also includes a case where a baseboard portion and the like are formed together. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.

[0059]

According to the first aspect of the present invention, the mechanical strength of the metal plate is enhanced, and the model portion can be held with the metal plate sandwiched by the resin molded portion. Deformation such as cracking or bending is prevented by vibration or compression of the metal plate generated during sanding work into a model portion on the metal plate by a molding machine or the like, and a highly accurate mold and cast product can be obtained. Also, the amount of resin used is small, and the processing of the metal plate is only required to make holes, so that it is easy and inexpensive.

According to the second aspect of the present invention, the resin injection port has a stepped portion or a tapered portion formed by enlarging the diameter of the resin injection side of the metal plate. Since it is sandwiched in the vertical direction by the parts, there is no displacement of the model part in the vertical direction, and a highly accurate mold and cast product can be obtained.

According to the third aspect of the present invention, a concave groove is provided in contact with the outer peripheral edge or the inner peripheral edge of the model portion of the metal plate. Or, since the imposition part is integrally formed on the inner peripheral edge, the movement of the model part in the left-right direction is restricted, the displacement of the model part in the left-right direction is prevented, and a high-precision mold and cast product can be obtained. .

According to the fourth aspect of the present invention, the resin is injected into the model portion and the concave groove, whereby the imposition portion is integrally formed on the outer peripheral edge or the inner peripheral edge of the model portion, and the metal plate and the outer peripheral edge of the model portion are formed. Alternatively, since the concave R-shaped surface or the straight C-shaped surface is formed at the boundary with the inner peripheral edge, the clogging of the corners of the mold is improved during the molding of the mold, or the mold is prevented from being caught when the mold is removed. Can be prevented,
Highly accurate molds and cast products can be manufactured.

According to the fifth aspect of the present invention, the model portion is formed integrally with the imposition portion, so that the movement in the left-right direction is restricted.
Vibration or compression of the metal plate generated during sanding work of the metal plate by the Jolt squeeze molding machine prevents deformation such as cracks and bending, and shifts the position of the model part in the left and right direction And a resin model capable of producing a high-precision mold and cast product can be easily manufactured.

According to the sixth aspect of the present invention, the resin material is injected into the negative internal space from the resin injection port opened in the metal plate, and the locking groove provided on the entire outer periphery of the model portion or a part thereof. Is filled with a resin material, and the model part and the locking groove are formed integrally with the resin material. Thereby, the metal plate and the model portion are securely held, the displacement and the displacement thereof are prevented, and a resin model capable of manufacturing a highly accurate mold and a cast product can be easily manufactured.

According to the seventh aspect of the present invention, since the convex arcuate R surface or the linear C surface is formed at the boundary between the outer peripheral edge or the inner peripheral edge of the negative model portion and the upper surface of the concave groove, An imposed portion is formed on the outer peripheral edge or the inner peripheral edge of the mold, and a concave R-shaped surface or a straight C surface is formed on the boundary between the metal plate and the outer peripheral edge or the inner peripheral edge of the model portion. By improving the clogging of the parts and preventing the parts from being caught when the mold is removed, it is possible to prevent the mold from being lost, and it is possible to easily produce a resin model capable of producing a highly accurate mold and a cast product.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a perspective view of a metal plate and a negative.

FIG. 2 is a view showing the first embodiment of the present invention, and is a bottom view of the resin model.

FIG. 3 is a view showing the first embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 4 is a view showing the first embodiment of the present invention, and is a view showing a manufacturing process of a resin model.

FIG. 5 is a view showing the first embodiment of the present invention, and is a view showing the manufacturing process of the resin model.

FIG. 6 is a view showing the first embodiment of the present invention, and is a view showing a manufacturing process of a resin model.

FIG. 7 is a view showing the first embodiment of the present invention, and is a view showing the manufacturing process of the resin model.

FIG. 8 is a view showing a first embodiment of the present invention;
It is sectional drawing of a squeeze molding machine.

FIG. 9 is a view showing the first embodiment of the present invention, and is a cross-sectional view of a mold.

FIG. 10 is a view showing a second embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 11 is a view showing a third embodiment of the present invention, and is a perspective view of a metal plate and a negative.

FIG. 12 is a view showing a third embodiment of the present invention, and is a bottom view of a resin model.

FIG. 13 is a view showing a third embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 14 is a view showing a fourth embodiment of the present invention, and is a bottom view of a resin model.

FIG. 15 is a view showing a fourth embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 16 is a view showing a fourth embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 17 is a view showing a fourth embodiment of the present invention, and is an enlarged sectional view of a concave groove portion.

FIG. 18 is a view showing a fourth embodiment of the present invention, and is an enlarged sectional view of an imposition portion.

FIG. 19 is a view showing a fifth embodiment of the present invention, and is a bottom view of a resin model.

FIG. 20 is a view showing a fifth embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 21 is a view showing a sixth embodiment of the present invention, and is a bottom view of a resin model.

FIG. 22 is a view showing a sixth embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 23 is a view showing a seventh embodiment of the present invention, and is a bottom view of a resin model.

FIG. 24 is a view showing a seventh embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 25 is a view showing an eighth embodiment of the present invention, and is a bottom view of a resin model.

FIG. 26 is a view showing an eighth embodiment of the present invention, and is a cross-sectional view of a resin model.

FIG. 27 is a perspective view of a conventional metal plate and a negative.

FIG. 28 is a manufacturing process diagram of a conventional resin model.

FIG. 29 is a manufacturing process diagram of a conventional resin model.

FIG. 30 is a manufacturing process diagram of a conventional resin model.

FIG. 31 is a manufacturing process diagram of a conventional resin model.

FIG. 32 is a sectional view of a conventional Jolt squeeze molding machine.

FIG. 33 is a sectional view of a conventional mold.

[Explanation of symbols]

 Reference Signs List 5 Negative 5A Internal space 5C Boundary part 5D Convex arc-shaped R surface 10, 10 'Metal plate 10A to 10E Resin injection port 10K Concave groove 11 Hardware 11A Through hole 13 Table 15 Metal frame 17 Sand 19 Cylinder 20 Sand frame 20A Filler port B Bolt E Jolt Air J Jolt Squeeze Molding Machine H Exhaust S Stroke M Resin Model Mo Model Part O Resin Molding Part P Imposition Part (Extra Filling Part) m Outer Peripheral Edge m1 Concave R Surface N Female Screw

Claims (7)

[Claims] 1. A resin formed by injecting a resin into a metal plate, a model portion formed on the metal plate, and a resin injection port formed partially in the metal plate with respect to the model portion. A resin model, comprising a molded part, wherein the model part and the resin molded part are integrally formed with a metal plate sandwiched therebetween. 2. The resin model according to claim 1, wherein said resin injection port has a step portion or a tapered portion whose diameter on the resin injection side is enlarged. 3. A concave groove is provided in contact with an outer peripheral edge or an inner peripheral edge of a model portion of the metal plate, and a resin is injected into the model portion and the concave groove to form a surface on an outer peripheral edge or an inner peripheral edge of the model portion. The resin model according to claim 1, wherein the attachment portion is integrally formed. 4. A concave groove extending outward from an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate is provided, and a resin is injected into the model portion and the concave portion to form an outer peripheral edge or a concave portion of the model portion. The imposition part is formed integrally with the inner peripheral edge, and a concave arc-shaped R surface or a straight C surface is formed at the boundary between the metal plate and the outer peripheral edge or the inner peripheral edge of the model part. The resin model described. 5. A negative is arranged on one side of the metal plate, and a resin material is injected into the negative internal space from a resin injection port opened in the metal plate, and a model portion of the resin material is placed on the metal plate. In the method for manufacturing a resin model to be integrally formed, the resin injection port is partially formed with respect to the model section, and the model section and a resin molded section formed by injecting resin into the resin injection port are formed on a metal plate. A method for manufacturing a resin model, wherein the resin model is integrally formed in a state where the resin model is sandwiched. 6. A concave groove is formed in contact with an outer peripheral edge or an inner peripheral edge of a model portion of the metal plate, and a resin material is injected into a negative internal space from a resin injection port opened in the metal plate, and the concave groove is formed. 6. The method for manufacturing a resin model according to claim 5, wherein a resin material is filled, and an imposed portion is formed on an outer peripheral edge or an inner peripheral edge of the model portion. 7. A concave groove extending outward from an outer peripheral edge or an inner peripheral edge of the model portion of the metal plate, and formed at a boundary between an outer peripheral edge or an inner peripheral edge of the negative model portion and an upper surface of the concave groove. A convex arcuate R surface or a linear C surface is formed, and a resin material is injected into the negative internal space from a resin injection hole opened in the metal plate, and the concave groove is filled with the resin material. 6. The resin model according to claim 5, wherein an imposed portion is formed on an inner peripheral edge, and a concave R-shaped surface or a straight C-shaped surface is formed on a boundary between the metal plate and an outer peripheral edge or an inner peripheral edge of the model portion. Manufacturing method.