JPH11123728A - Mold and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive so that a molten material for constituting a molding is hard to flow into a portion of the molding to be formed with a recess and a through hole by obtaining a mold for engaging a surface having a shape bridged over a surface of a male component to be formed with a cavity and the other portion with a surface of a female mold component. SOLUTION: A cavity component 10 is engaged as an insert with a main mold, and a core component 20 is engaged as an insert with the other main mold. Thereafter, these two molds are closed, and a positioning hole 20c opened at a parting surface 20a of the component 20 is engaged with a positioning pin 10 stood on a parting surface 10a of the component 10. Thus, when the surface 10a of the component 10 is brought into close contact with the surface 20a of the component 20, a space surrounded by an engraved surface 10b of the component 10 and an engraved surface 20b of the component 20 or a cavity can be formed. Thus, a molding can be formed of a molten resin cast via a runner 10e and a gate 10f.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold that does not generate burrs on a molded product, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A cavity of a usual injection molding die,
That is, a space for filling the molten resin as a molding material is formed by bringing a surface (hereinafter, a joining portion) into which a female mold (cavity part) and a male mold (core part) abut each other into close contact. Is done. Therefore, whether or not burrs are generated largely depends on the quality of processing accuracy of each of the cavity component and the core component. So, cavity parts,
Processing accuracy is emphasized in all manufacturing processes for core components.

[0003]

However, the above-described conventional injection molds (hereinafter, referred to as conventional molds) often have burrs on molded products. That is,
There is a limit in the adhesion between the joints between the cavity component and the core component that are manufactured separately.Therefore, when the mold is closed, there is a gap between the cavity component and the core component where the molten resin that becomes burrs enters. May be formed.

If such burrs occur in through holes formed in the molded product or in grooves formed from one end surface of the molded product to the other end surface, the burrs may be defective depending on the purpose of use of the molded product. There are also things that end up.

Therefore, an object of the present invention is to provide a mold that does not generate burrs on a molded product. It is another object of the present invention to provide a method of manufacturing a mold that can easily manufacture a mold that does not generate burrs on a molded product.

[0006]

According to the present invention, there is provided a molding die used for producing a molded article having a desired shape from one end face to the other end face. The mold has at least a first mold part and a second mold part, the first mold part having a first inverted shape which is an inverted shape of a desired shape, and In the molding die in which a space having the same shape as the molded product is formed by combining the component and the second mold component, the second mold component includes a part of the inverted shape of the first inverted shape. It has a second inverted shape that is substantially the same shape, and the first inverted shape is extended to the first mold component to such an extent that the first inverted shape is fitted to the second inverted shape.

As described above, the first mold part is formed in a shape extending over both the surface forming the cavity and the other part (for example, a convex shape) and formed in the second mold part. The molded material is fitted with the concave portion to obtain a mold, so that the molten material constituting the molded product does not easily flow into the concave portion or the through hole of the molded product, and the concave portion or the through hole of the molded product is not formed. Burrs are less likely to occur at one end.

Further, in a second aspect of the present invention, the first
Of the first mold part is one of a surface forming the space of the first mold part and one of the surfaces which are brought into close contact when the first mold part and the second mold part are joined together. The parting surface of the second mold part has a second inverted shape.

By doing so, especially when forming an article in which a concave portion is formed from one surface to the other surface of the molded product, the parting surface of the first mold part is also formed in this way. By forming a convex portion which is an inverted shape of the concave portion and forming an inverted shape of the convex portion on the second mold component to obtain a mold, the convex shape formed on the surface of the cavity is machined. It is easy to create a shape, and it is possible to obtain a mold in which burrs are less likely to occur.

Further, in a third aspect of the present invention, the first aspect
Has a convex shape, a convex shape is formed on a surface forming a space in the first mold part, and a reverse shape of the convex shape is formed on a surface forming a space in the second mold part. A second inverted shape is formed, and the convex shape is provided so as to be longer than a desired shape to be formed on the molded product, so as to fit into the second inverted shape.

As described above, when a through hole is formed in a molded product, a convex shape having an inverted shape of the through hole is formed in the first mold part, and the convex shape is larger than the length of the hole of the molded product. Was formed long. Then, a second inverted shape having the inverted shape of the convex shape is formed in the second mold component, and the first mold component and the second inverted shape are fitted while fitting the convex shape and the second inverted shape. A suitable mold for forming a molded product having a through-hole can be obtained by bringing the mold parts into contact with each other. By obtaining such a mold, even if a molten material is injected under a high pressure into a space formed between the first mold part and the second mold part, the mold hardly generates burrs. Can be obtained. In addition, the more the cross-sectional diameter of the convex shape becomes larger on the first mold side and becomes closer to the tip end side, the more the burr is less likely to be generated by making it thinner. In particular, when a fine hole having a diameter of 1 mm or less is formed, it is preferable to use such a mold.

According to a fifth aspect of the present invention, there is provided a mold for molding a molded product having a fine shape on the order of millimeters or less from one end surface to the other end surface. Forming a space having the same shape as the molded product by combining the first mold component with the second mold component, and inverting the desired shape on the surface of the first mold component on which the space is formed. By forming a shape, the first
Preparing the second mold part material on the first mold part, and peeling off the deposited second mold part material from one mold to form the other mold part. did.

[0013] By forming the first mold part and the second mold part in this manner, the inverted shape of the first inverted part formed on the first mold part is faithful to the second molded part. Can be formed. Therefore, when the first mold part and the second mold part are brought into contact with each other, it is possible to obtain a mold in which a gap is hardly generated and burrs are hardly generated.

In particular, when forming a shape on the order of millimeters or less into a molded product, the molding conditions are such that the molten material reaches even a very fine shape. Done. Therefore, when there is a portion where the first mold component and the second mold component are fitted in the space where the molded product is formed, the fitting portion is brought into close contact with the space. We have to create each other's shape. Therefore, in the present invention, a mold part in which the first mold part and the second mold part are satisfactorily fitted by forming the second mold part after obtaining the inverted shape of the first mold part. And a molded article can be manufactured.

Further, in the fifth embodiment of the present invention, the first mold part is further extended until a part of the inverted shape is fitted into the shape formed on the second mold part. I decided to. By doing so, as described in the first embodiment of the present invention, the shape (for example, the convex shape) extending over both the surface forming the cavity and the other portion of the first mold component And the recesses formed in the second mold part are fitted to each other to obtain a mold, so that the molten material constituting the molded product flows into the portions of the molded product where the recesses and through holes are formed. This makes it difficult to cause burrs at one end of the concave portion or through hole of the molded product.

In the method of manufacturing a mold according to the present invention,
The procedure of forming a space that is a cavity may be to form a space by machining a material precipitated in one mold, or to apply an article having the same shape as a molded article to one mold. In this state, the space may be formed at the same time as the deposition by depositing the material constituting the other mold.

The mold of the present invention is preferably formed by electroforming or electroless nickel plating when forming the other mold. In this way, by forming the other mold while depositing the mold material in one mold, it is possible to easily and faithfully obtain an inverted shape of one mold.

Next, the present invention will be described in detail with reference to specific embodiments.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the basic structure of the mold according to the first embodiment of the present invention will be described with reference to FIG.
The mold shown in FIG. 1 is a mold for injection-molding a molded product 50 having a groove formed from one end to another end as shown in FIG.

The mold according to the first embodiment comprises a cavity part 10 and a core part 20. In addition, the core part 20 is formed with a convex part 20d having an inverted shape to the groove shape of the molded product. Also,
The surface 10a of the cavity component 10 (hereinafter referred to as the parting surface 10) which is brought into contact with the core component 20 during injection molding.
In (a), an inverted shape of the projection 20d formed on the core component 20 is formed. Further, the cavity part 1
0 are formed at the four corners of the core component 20, and the positioning pins 10c
And a positioning hole 20c that fits with the hole.

The cavity, which is the space where injection molding is performed in the first embodiment, is formed by bringing the parting surface 10a of the cavity component 10 into close contact with the parting surface 20a of the core component 20. Specifically, after the cavity component 10 is fitted as a nest in one main mold (not shown) and the core component 20 is nested in the other main mold (not shown), the two main dies are closed. Then, a positioning hole 20c formed in the parting surface 20a of the core component 20 is fitted to a positioning pin 10c provided upright on the parting surface 10a of the cavity component 10 (see FIG. 3). When the parting surface 10a of the cavity component 10 is brought into close contact with the parting surface 20a of the core component 20, the cavity component 10
The space surrounded by the engraved surface 10b of the core component 20 and the engraved surface 20b of the core component 20, that is, the runner 10e and the gate 10
The cavity forming the molded product 50 is formed by the molten resin flowing from f. Here, the engraved surfaces 10b and 20b are surfaces on which the inverted shape of the molded product 50 is engraved.

The parting surface 2 of the core component 20
0a is formed by using the parting surface 10a of the cavity component 10 as a matrix.
That is, the transfer surface of the parting surface 10 a of the cavity component 10 is used as the parting surface 20 a of the core component 20. Therefore, at the time of closing the mold, not to mention the adhesiveness between the planes included in both parting surfaces 10a and 20a, and the adhesiveness between the uneven portions 10d and 20d included in both parting surfaces 10a and 20a. The adhesion between the curved surfaces (not shown) included in both parting surfaces 10a and 20a is extremely high. Then, when molding was performed using this mold under molding conditions considered to be effective in preventing the occurrence of short shots and sink marks, no burrs were observed on the surface. Was. This means that the parting surface 10a of the cavity component 10 and the parting surface 2
0a means that no adhesion failure causing burrs occurred at all. Therefore, according to the mold according to the present embodiment, a molded product including fine irregularities and the like,
Injection molding can be performed accurately and without burrs.

In particular, if the molded article to be manufactured is used for, for example, a ferrule of an optical fiber in which an optical fiber is mounted in a groove, it is preferable to manufacture the molded article using the mold according to the first embodiment. . If burrs are generated at the joint between the cavity component and the core component and at the groove in such a molded product, when placing the optical fiber in the groove, the burrs cause the fiber to adhere to the groove. A defect such as being unable to be mounted occurs. The ferrule is used in the following manner, for example.

Two plugs each containing a ferrule to which an optical fiber is fixed are inserted and fixed from both ends of an adapter housing having a sleeve therein, and the ferrules are brought into contact with each other in the sleeve so as to face each other. Connector. In this case,
The outgoing portions of the optical fibers must be co-linear. However, the mounting position of the optical fiber at which the burrs are generated is shifted from a predetermined position, so that the emission portions of the optical fibers are shifted.

By using the mold shown in the first embodiment to prevent such a situation, it is possible to prevent the occurrence of such a defect.

When a fluid or the like is caused to flow through the formed groove, the formed burrs block the flow path, which is not preferable. However, by using the mold shown in the first embodiment, The occurrence of such a defect can be prevented.

In order to release air from the cavity when the molten resin flows in, the molten resin formed between a protruding pin (not shown) used to eject a molded product and a pin hole (not shown) is formed. A gap that does not allow resin to enter is used. However, in the case where a weld line is likely to be formed at a certain position of the molded product 50, it is also effective to provide an air vent at that position.

Next, a method of manufacturing the mold of the first embodiment shown in FIG. 1 will be described.

In general, a molded product has a trace of a joining line (hereinafter referred to as a parting line) along a boundary formed when a parting surface of a cavity part and a parting surface of a core part are brought into contact with each other. Often remains. Therefore, it is desirable to determine the shape of the parting line so that the parting line trace remains at a position that is as inconspicuous as possible on the appearance of the molded product 50 in the first embodiment shown in FIG. Thus, in the first embodiment, the molded product 50 shown in FIG.
The parting line is determined along the ridge line 50e.

Next, a shoulder material for a cavity is manufactured. First, grooves having the same shape as the grooves formed in the molded product are formed on the surface of the cavity mold as shown in FIG. 4 by planar processing using a diamond tool. The groove is formed continuously in a predetermined region 30b on the surface of the cavity mold member 30 having conductivity and a region 30a to be a parting surface of the cavity component. Further, an outer peripheral area 30a surrounding this area 30b, that is, a parting surface of the cavity component (corresponding to 10a in FIG. 1B)
A shape having the parting line as a contour line is created in the region 30a to be formed.

The cavity mold 30 used here
It is desirable that the material has not only conductivity but also mechanical strength enough to withstand a load (molding pressure and temperature) during use. Furthermore, a material with excellent workability, specifically, (1) a good work surface can be created by a diamond tool,
(2) It is desirable that the diamond tool has characteristics such as less damage and wear of the diamond bite, and (3) easy dimensional accuracy. Examples of a material having such properties include brass.

By the way, the cavity mold material 30 in which the groove is formed is then coated on its surface 30a, 30b with an appropriate release agent selected according to the material of the cavity mold material 30 and the like. Then, a metal (for example, nickel or the like) having a strength enough to withstand use as a mold component is deposited on the surfaces 30a and 30b by electroforming to form the metal layer 40 by using the cavity mold material 30 as an electrode. I do. Since the metal layer 40 is used as the core component 20, it is desirable that the metal layer 40 has at least a thickness enough to withstand use as a mold component.

The metal layer 40 obtained in this way is the same as that shown in FIG.
As shown in FIG.

Thereafter, the cavity mold member 30 and the metal layer 4
The metal layer 40 is ground with the bottom surface 30d of the cavity mold member 30 as a reference surface while the 0 is still integrated, and the thickness Z of the metal layer 40 is finished as designed. At this time, the parallelism between the surface 40d of the metal layer to be the bottom surface of the core mold material and the bottom surface 30d of the cavity mold material 30 must be within an allowable range. And then,
The side surface 40e of the metal layer 40 is subjected to cutting or the like to finish the outer dimensions XY of the metal layer 40 as designed.

Further, at predetermined plural locations O shown in FIG.
A through hole is formed from the front surface 40d of the metal layer 40 to the back surface 30d of the cavity mold member 30. Thereby, a through hole for fitting the positioning pin 10c is formed in the cavity mold member 30, and a through hole to be the positioning hole 20c is formed in the metal layer 40. As described above, if the through holes are formed at a stretch while the cavity mold member 30 and the metal layer 40 are integrated, the positional accuracy of each positioning pin 10c with respect to each positioning hole 20c is greatly improved. Therefore, it is possible to prevent a relative displacement between the cavity component 10 and the core component 20 when the mold is closed.

Thereafter, the metal layer 40 is peeled off from the surfaces 30a and 30b of the cavity mold member 30 by using an appropriate tool. At this time, on the back side of the metal layer 40 peeled off, that is, on the surfaces 40a, 40b of the core mold 40, as shown in FIG.
The inverted shape of b is transferred. Further, a through hole 40c to be the above-described positioning hole 20c is also formed.

On the other hand, in the cavity mold member 30, a shape to be a cavity portion is formed in a region 30b where a groove having the same shape as the groove formed in the molded product 50 is formed by electric discharge machining or the like. At this time, other portions, for example, the runner 10e and the gate 10f are also formed together with cutting and the like. Thereafter, by inserting a positioning pin 10c prepared in advance into each of the above-described through holes and fixing it, the cavity component 10 of FIG. 1B is completed.

When the core component 20 and the cavity component 10 are completed as described above, finally, the cavity component 10 is fitted into one main mold, and the core component 20 is fitted into the other main mold. Let it.

As described above, the mold part shown in FIG. 1 was manufactured.

If the electroforming method is used as described above, even if the parting line has a complicated shape, the core part having the parting surface having high adhesion to the parting surface of the cavity part can be obtained. Can be manufactured simply and reliably. In the present embodiment, the parting surface of the core component is formed using the parting surface of the cavity component as a matrix from the viewpoint of ease of processing and the like. It is needless to say that even if the parting surface of the cavity part is formed, the same effect of preventing the occurrence of burrs on the molded product can be obtained by using the as a mold.

Incidentally, in the mold according to the first embodiment, as shown in FIG. 1, the parting surface 20a of the core component 20 is provided on the parting surface 10a of the cavity component 10.
a is formed by inverting the shape of the convex portion formed in
By fitting the groove of the parting surface 10a of the cavity component 10 with the projection of the parting surface 20a of the core component 20, the occurrence of burrs at the end of the groove is suppressed. The present invention is not limited to a mold having a groove and a convex shape.

Next, a description will be given of a second embodiment of the present invention, which is a mold capable of suppressing the occurrence of burrs at the ends of shapes other than the groove shape.

In a second embodiment described below, a mold for forming a molded product having a small-diameter hole such as a nozzle plate of an ink jet printer will be described.

A mold according to the second embodiment will be described with reference to FIG. FIG.
7A shows the cavity component 80, and FIG. 7B shows the core component 81.

By the way, the core part 81 has a parting surface 81b which is a region which forms a space into which the molding material flows during the injection molding and a region which is in close contact with the cavity part 80.
There is a. In the region 81b, a pin 80d having an inverted shape of a hole formed in a molded product is formed.
Further, the parting surface 81a has a positioning pin 8
1c are formed at two places.

The cavity part 80 is formed by the core part 8
1. There is a parting surface 80a that is in close contact with 1 and a carved surface 80b that forms a molding space. Further, two alignment holes 80c are formed in the parting surface 80a. Further, a concave portion 80d that fits into a convex portion formed on the core component 81 is formed on the engraved surface 80b.
A gate (not shown) is formed on the cavity component 80 or the core component 81. The gate is provided to inject the molten resin into the space for molding.

The space (cavity) into which the molding material flows in the mold according to the second embodiment is such that the parting surface 80a of the cavity part 80 and the parting surface 81a of the core part 81 are in close contact with each other. It is formed by things.

In the second embodiment, the pin 81d formed on the core component 81 is connected to the cavity component 80 in order to obtain a molded product having a small-diameter hole and having no burr in the hole. The mold is formed by fitting into the concave portion 80d formed in the above, and bringing the respective parting surfaces 80a and 81a into close contact with each other.

In this manner, the molding material flowing during the injection molding does not easily enter between the protruding end of the pin 81d formed in the core part 81 and the concave part 80d formed in the cavity part 80.

Further, at the time of injection molding, the pressure for injecting the molten resin acts as a force for pressing the surface forming the cavity portion, and the pin 81d itself is easily deformed at the time of injection molding. In particular, the finer the pin diameter is, for example, about 1 mm or less, the easier it is to deform.

However, in the mold according to the second embodiment of the present invention, one end of the pin 81d is fixed to the core part 81 and the other end is fitted in the hole of the cavity part 80. The 81d support structure is a two-sided structure,
The pin 81d is less likely to be deformed than a cantilevered die supporting the pin. Therefore, it is possible to prevent burrs generated due to deformation of the pins during injection molding.

Further, the pin 8 according to the second embodiment
1d uses a taper pin having a larger diameter toward the core component and a smaller diameter toward the side fitted with the cavity component. By using this taper pin, the molded product can be easily removed from the mold. In addition, when the edge at the tip of the pin 81d abuts on the edge of the recess 80d, the edge can be prevented from being damaged. Also, galling between the molds can be prevented.

Even if injection molding is performed using this tapered pin and the distance between the core component and the cavity component is widened by 5 micrometers, the angle of the side surface of the pin 81d is inclined by 3 degrees with respect to the center line of the pin. In case, the pin 81d
The amount of the gap between the groove and the concave portion 80d is only about 0.3 μm. For most resins in such a gap,
Since it does not flow, no burrs are generated.

As described above, in the mold according to the second embodiment, it is possible to suppress the occurrence of burrs at the holes formed in the molded product. In particular, when the molded product is something like a nozzle plate of an inkjet printer head,
Since the flow of the ink ejected from the nozzle is not obstructed, a defect due to the flow can be eliminated.

Next, a method of manufacturing the mold part shown in FIG. 7 will be described. However, here, the description will focus on the differences from the method of manufacturing the mold of FIG.

First, the core part 81 is manufactured. A prepared hole having a predetermined diameter is formed in a predetermined region on the surface of the core material having conductivity by electric discharge machining.

Then, a pin 81d provided with a taper made of the same material as the core material is fitted and fixed in each prepared hole. Since the pins to be fitted here are to be tapered pins 81d of the core component 81,
It is necessary that the molded product 70 is formed to be appropriately longer than the thickness t. Also, regarding the positioning pin 81c,
It is provided by drilling a pilot hole and inserting a pin there.

Next, an appropriate release agent selected according to the material and the like is applied to the surfaces of the core mold member and the tapered pin. A metal layer is formed on the surface of the core mold material by electroforming using the core mold material provided with the pins 81c and 81d as an electrode. Note that this metal layer needs to be formed to a thickness that is more than the thickness of the molded product.

Thereafter, the side surfaces and the like of the metal layer 91 are subjected to finish grinding, and then the metal layer 91 is removed from the surface of the core material.
Is peeled off. At this time, the back side of the metal layer 91 peeled off,
That is, as shown in FIG. 10, the inverted shapes 80c, 91b of the pins 81c, 81d are provided on the surface of the cavity forming material 91.
Has been transcribed. Note that 80c is a hole for positioning the core component.

The peeled metal layer will be described below as a cavity mold.

Then, in a predetermined region 91a on the surface of the cavity forming material 91, an inverted shape of the shape of the molded product is engraved by electric discharge machining. Thereby, the engraved surface 8 of the cavity part 80 is provided on the surface of the cavity forming material 91.
0b and a concave portion 80d to be a tapered hole of the cavity component 80 are formed. And then,
When the gate, the runner, and the like are formed, the cavity part 80 shown in FIG. 7A is completed.

On the other hand, other parts required as core parts, for example, pin holes for accommodating protruding pins, are formed in the core mold material by electric discharge machining or the like. Thus, the core component 81 of FIG. 7B is completed.

When the core component 81 and the cavity component 80 are completed as described above, they are fitted into the main mold, respectively, to complete the mold.

By using the electroforming method, it is possible to easily and reliably manufacture a cavity component having a tapered hole in which the pitch error of the core component with respect to the tapered pin is extremely small and the core component has high adhesion to the tapered pin. it can.

When the size of the concave portion or through hole formed in the molded product is smaller than the order of several millimeters, and the pitch of the shapes is less than the order of millimeters, the molding conditions in the injection molding are as follows. Conditions are set such that the molten resin can penetrate into such a fine structure, so that burrs are easily generated. However, if the other mold part is formed by using the electroforming method or the electroless nickel plating method as described above, a mold part having good adhesion when fitted to each other can be obtained.

In this embodiment, the tapered hole of the cavity part is formed by using the tapered pin of the core part as a matrix. On the contrary, the tapered hole of the cavity part is used as a matrix to form the core part. It goes without saying that even when the tapered pin is formed, the same effect of preventing the occurrence of burrs on the molded product can be obtained.

In this embodiment, the engraved surface of the cavity part is formed by electric discharge machining, but this is not always necessary. For example, as shown in FIG. 9, the engraving surface forming mold 110 having the same shape as the molded product.
May be formed in advance using a conductive material, and the engraved surface forming mold 110 may be combined with the core mold material 90, and then the metal layer 90 may be formed by electroforming. In this way, a cavity mold having an engraved surface from the beginning can be formed.

In each of the manufacturing methods described above, the electroforming method is used, but other processing methods having the same transferability as the electroforming method, such as the thermal spraying method and the electroless plating method, are used. You may use.

The use of the mold according to the present embodiment as another molding die, for example, a casting die, a transfer molding die or the like is not precluded.

[0071]

According to the mold of the present invention, since the adhesion between the joining parts of the mold parts at the time of closing the mold is extremely good, it is possible to mold a molded product without burrs.

[Brief description of the drawings]

FIG. 1A is a perspective view of a core component of a mold according to one embodiment of the present invention, and FIG. 1B is a perspective view of a cavity component of the mold according to one embodiment of the present invention. FIG.

FIG. 2 is a perspective view of a molded product.

FIG. 3 is a view for explaining alignment between a cavity component and a core component when closing a mold.

FIG. 4 is a perspective view of a cavity mold member.

FIG. 5 is a perspective view of a cavity mold having a metal layer formed on a surface.

FIG. 6 is a perspective view of a core material.

FIG. 7A is a perspective view of a mold cavity part according to one embodiment of the present invention, and FIG. 7B is a perspective view of a mold core part according to one embodiment of the present invention. FIG.

FIG. 8 is a perspective view of a cavity mold member.

FIG. 9 is a perspective view of a core mold material in which a mold for forming an engraved surface is combined.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Cavity part 10a ... Parting surface 10b ... Engraving surface 10c ... Alignment pin 20 ... Core part 20a ... Parting surface 20b ... Engraving surface 20c ... Positioning hole 50 ... Molded product 80 ... Cavity part 80a ... Parting surface 80b: Engraved surface 80d: Tapered hole 81: Core part 81a: Parting surface 81b: Engraved surface 81c: Positioning hole 81d: Tapered pin

Claims (4)

[Claims] 1. A molding die used for manufacturing a molded product having a desired shape formed from one end surface to the other end surface, wherein the molding die includes at least a first mold part and a second mold. A first mold part having a first inverted shape which is an inverted shape of the desired shape, and combining the first mold part and the second mold part, In a molding die in which a space having the same shape as the molded product is formed, the second mold part has a second inverted shape substantially the same as a part of a shape obtained by further inverting the first inverted shape. A molding die, wherein the first inverted shape of the first mold component is extended to such an extent that the first inverted shape is fitted to the second inverted shape. 2. The first inverted shape is provided on a surface forming the space of the first mold component, and is brought into close contact when the first mold component and the second mold component are combined. The molding die according to claim 1, wherein the molding die extends on a parting surface of the first mold part, which is one of the surfaces, and has a second inverted shape on the parting surface of the second mold part. . 3. The first inverted shape has a convex shape, the convex shape is formed on a surface forming the space in the first mold part, and the space in the second mold part is formed in the first mold part. On the surface to be formed,
The second inverted shape, which is the inverted shape of the convex shape, is formed, and the convex shape is provided so as to extend from a desired shape of the molded product to the extent that the second inverted shape is fitted to the second inverted shape. The mold according to claim 1, wherein 4. A mold for molding a molded product having a fine shape on the order of millimeters or less from one end surface to the other end surface, wherein a first mold part and a second mold part are combined. In the method of manufacturing a mold for forming a space having the same shape as the molded product and forming the molded product, forming an inverted shape with respect to the desired shape on a surface of the first mold component where the space is formed. In the first
Preparing a second mold part material; depositing a material of a second mold part on the surface of the first mold part; separating the deposited material of the second mold part from the first mold part; A method for manufacturing a mold, comprising forming a mold part of (2).