JP7407322B1 - Molding molds and molding methods for molded products - Google Patents

Abstract

An object of the present invention is to provide a mold component or the like that does not limit the shape or structure of a molded product that can be molded. A mold component comprising a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded product corresponding to the shape of the cavity. A mold component disposed in a molding die, which is slidably inserted into and removed from a side surface of the molding die perpendicular to a contact surface between the first mold and the second mold. 1 mold component and a second mold component, the first mold component and the second mold component are connected from a first opening to a second opening of the molded product. form a hollow part. [Selection diagram] Figure 1

Description

The present invention relates to a mold for molding and a method for molding a molded article.

Generally, a molded product such as a plastic model molded using resin is configured by connecting a plurality of parts to be assembled to a runner (see Patent Document 1).

Japanese Patent Application Publication No. 2006-142578

Such a molded product is produced by the injection mold having a fixed side and a movable side, and by solidifying a molding material poured into a cavity formed between the fixed side and the movable side. The shape and structure of the produced molded product depends on the form of the injection mold.

An object of the present invention is to provide a mold component, a molding die, and a method for molding a molded product in which the shape and structure of the molded product are not limited.

The present invention relates to a mold component, for example, which includes a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded product corresponding to the shape of the cavity. A mold component placed in a mold consisting of a mold, the mold part being inserted and removed by sliding from a side surface of the mold that is perpendicular to the contact surface between the first mold and the second mold. a first mold part and a second mold part, the first mold part and the second mold part being a part that extends from a first opening to a second opening of the molded article. form a hollow part that connects to.

Another aspect of the present invention is, for example, a molding die including the above-described mold components, comprising a first die and a second die, the first die and the second die. At least one of the second mold parts has a runner groove formed so as to bypass the insertion/extraction path of the first mold part and the second mold part.
Further, a molding mold having a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded article corresponding to the shape of the cavity, the molding mold comprising: A mold component is provided that is placed in a mold, and the mold component slides from a side surface of the mold that is perpendicular to a contact surface between the first mold and the second mold. The first mold part and the second mold part are inserted into and removed from the first opening of the molded product. 2, and an insertion/extraction path for the first mold component and the second mold component is formed in at least one of the first mold and the second mold. It has a runner groove formed to straddle and detour .

Still another aspect of the present invention is, for example, a method for molding a molded article, which includes the above-mentioned molding die, in which the first mold part and the second mold part are arranged at predetermined positions. a first step of injecting a molding material into a molding die to form a molded product in which a plurality of parts are connected to a runner; The method includes a second step of removing the second mold component from the molding die, a third step of removing the second mold component from the molding die, and a fourth step of taking out the molded product.
Further, there is provided a method for molding a molded article, in which the molding material is placed in the molding mold described above, in which the first mold part and the second mold part are arranged at predetermined positions. A molded product formed by injecting and connecting a plurality of parts to a runner, the molded product being formed so as to straddle and detour the insertion/extraction path of the first mold part and the second mold part. a first step of molding a molded article including a molded runner, a second step of removing the first mold part from the molding mold, and a second step of removing the second mold part from the molding mold. The method includes a third step of removing the mold part and a fourth step of removing the molded product.

The present invention can provide a mold component, a molding die, and a method for molding a molded product in which the shape and structure of the molded product are not limited.

FIG. 1 is a diagram illustrating a cross section of a molding device 10 according to an embodiment. 1 is a flowchart corresponding to an example of a method for molding a molded article according to an embodiment. FIG. 1 is a diagram showing an example of the appearance of a molded product according to an embodiment. FIG. 3 is a diagram showing an example of how to use a slide mold component to explain a method of molding a molded article. FIG. 3 is a diagram for explaining the correspondence between surfaces forming a molded product and slide mold components. The figure which shows the example of a structure of the runner for ensuring the insertion/extraction path of a slide mold component.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the claimed invention, and not all combinations of features described in the embodiments are essential to the invention. Two or more features among the plurality of features described in the embodiments may be arbitrarily combined. In addition, the same or similar configurations are given the same reference numerals, and duplicate explanations will be omitted. In addition, in each figure, the up, down, left, right, front and back directions with respect to the paper surface will be used as the up, down, left, right, front and back directions of the component (or parts) in this embodiment in the explanation in the main text. Although the present invention assumes a resin material as the molding material in the embodiments described below, it is not limited to this, and other materials (thermoplastic resins such as polystyrene, polyethylene, ABS, thermosetting resins, metals, etc.) may be used. ) is also applicable.

FIG. 1 shows a sectional view of a molding apparatus 10 according to an embodiment of the invention. As shown in FIG. 1, the molding device 10 of this embodiment includes a movable mold body 102 that is attached to the movable side of a molding material injection device (not shown) that injects molding material, and a movable mold body 102 that is attached to the fixed side of the molding material injection device. It has a fixed mold body 103. Runner grooves into which the molding material flows are formed in the movable mold body 102 and the fixed mold body 103, respectively.

The movable mold main body 102 includes a male mold mounting plate 107 to which the male mold 106 is attached, a fixed base 108 to which the male mold mounting plate 107 is fixed, a movable side mounting plate 109 to be attached to the molding material injection device, and a fixed base 108. A spacer 110 is provided between the moving side mounting plate 109 and the moving side mounting plate 109. The male die 106 and the male die mounting plate 107 may be configured integrally or may be configured independently as separate bodies. A cavity 111 is formed in the fixed base 108, and a movable push-out plate 112 is provided within the cavity 111. The pushing plate 112 is fixed to a pressing shaft 116 provided in openings 114 and 115 formed in the fixed base 108 and the movable mounting plate 109. Further, a knockout pin 113 is formed on the extrusion plate 112 and passes through the male die mounting plate 107 and the male die 106 . Here, by moving the push-out plate 112, the tip of the knockout pin 113 is formed to protrude into the runner groove.

The fixed mold body 103 includes a fixed mounting plate 117 that is attached to the molding material injection device, a female mounting plate 119 that is attached to the female mold 118, and a spacer provided between the fixed mounting plate 117 and the female mounting plate 119. 120. The female mold 118 and the female mold mounting plate 119 may be configured integrally, or may be configured independently as separate bodies. A sprue bush 104 for injecting molten molding material from a molding injection device is attached to the fixed mold body 103. The sprue bush 104 passes through the fixed mounting plate 117 and extends to the female mold 118, and a sprue 105 is formed therein to serve as a supply channel for molten resin. The sprue 105 communicates with runner grooves formed in the female die 118 and the male die 106, and the molding material is introduced into the molding space (cavity) formed in the female die 118 and the male die 106 through this runner groove. is inflowed.

The male die 106 and the female die 118 each have a concave and convex shape, and the concave and convex shapes are combined to form a cavity that defines the outer shape of the molded product. The molding material flows into the cavity, and when it cools and hardens, a molded article corresponding to the shape of the cavity is formed. Hereinafter, the male die 106 and the female die 118 are also collectively referred to as a molding die.

The molding die is configured to include a plurality of mold parts that are configured to be inserted into and removed from the molding die. The mold component is placed on the contact surface between the male mold 106 and the female mold 118, and inserted into a cavity formed in the mold from the side of the mold perpendicular to the contact surface. This prevents the molding material from flowing into the cavity defined by the male die 106 and the female die 118, making it possible to form a hollow or cylindrical molded product.

In this embodiment, by inserting mold components from multiple directions into a cavity for molding one molded product, it is possible to mold a molded product with a shape that could not be achieved with a single mold component. is possible. In this embodiment, the above-mentioned mold component is referred to as a slide mold component.

In the molding apparatus 10 shown in FIG. 1, after forming a molded product by flowing the molding material into the runner grooves and cavities for forming each part, the movable mold body 102 is separated from the fixed mold body 103, and then , the slide mold parts are separated from the movable mold main body 102, and after all the slide mold parts have been separated, when the pressing shaft 116 is pressed and the extrusion plate 112 is moved, the parts provided on the extrusion plate 112 are removed. The knockout pins 113 push out the molded product attached to the male mold 106 constituting the movable mold body 102, and the molded product can be taken out.

FIG. 1 is a diagram showing the structure of the molding device 10 as an example, and the structure of the molding device 10 is not limited to that shown in FIG. 1, and various changes are possible.

Next, with reference to FIG. 2, a method for molding a molded article according to this embodiment will be described. First, in S201, the male mold 106 is set in the movable mold body 102 of the molding apparatus 10, followed by setting the first slide mold part in S202, and setting the second slide mold part in S203. Here, the first slide mold part and the second slide mold part are used as a pair of mold parts, and a hollow molded product is molded by the combination of the two slide mold parts and the male mold 106 and the female mold 118. It is possible. Further, a plurality of pairs of slide mold parts can be included for the male mold 106 and the female mold 118. Furthermore, three or more slide mold parts may be combined for one molded product.

The first slide mold component and the second slide mold component can be attached to a predetermined slide mechanism of the movable mold body 102 of the molding device 10. With the slide mechanism, each slide mold slides in a predetermined direction and is inserted into the cavity formed by the male mold and female mold before the molding material is introduced, and the molding material is solidified. After that, it is removed.

In subsequent S204, the movable mold body 102 including the slide mold parts is moved to the fixed mold body 103 side and combined with the fixed mold body 103. In the following S205, molding material is injected from the sprue 105, and the molding material flows into the cavity formed by the male die 106, the female die 118, and the slide mold parts. Thereafter, once the molding material has cooled and solidified, the movable mold body 102 is separated from the fixed mold body 103. At this point, the molded product is stuck to the movable mold body 102 side.

In subsequent S207, the first slide mold component is separated from the inside of the molded product by the slide mechanism of the molding device 10 described above, and in S208, the second slide mold component is separated from the inside of the molded product by the slide mechanism of the molding device 10 described above. . If you try to take out the molded product before the slide mold parts are separated, the molded product may be damaged, so take out the molded product after all the slide mold parts are separated. In subsequent S209, the molded product is removed by moving the extrusion plate 112 to cause the tip of the knockout pin 113 to protrude into the runner groove.

Next, with reference to FIG. 3, an example of the structure of a molded article corresponding to this embodiment will be shown. FIG. 3(A) is a diagram showing an example of the appearance of the molded product 300 from the direction in which the opening 301 of the molded product 300 faces the front. FIG. 3(B) is a diagram showing an example of the external appearance of the molded product 300 when viewed from a direction in which the opening 301 of the molded product 300 faces to the left. FIG. 3(C) is a diagram showing an example of the appearance of the molded product 300 from the bottom side of the molded product 300.

The molded product 300 shown in FIG. 3 is a hollow model component that has two openings, a front opening 301 and a bottom opening 303, and the openings are connected. The molded product 300 is configured to be able to be combined with other molded products through the openings 301 and 303, and thereby can constitute a part of the finished toy body. Although the openings 301 and 303 are formed on different surfaces of the molded product 300, the arrangement of the openings is not limited to the form shown in FIG. 3.

Although a model component having a shape like the molded product 300 can be made by combining two molded products, this embodiment assumes that it is molded as a single part. Therefore, the hollow portion connecting the opening 301 to the opening 303 needs to be formed by expelling the molding material from the cavity with the sliding mold part. At this time, if the hollow portion is to be molded using only a single slide mold component, it is necessary to open the portion shown by the hatched area 304 in FIG. However, if the opening 301 becomes larger, the internal structure becomes more visible from the outside, which is not preferable.

Therefore, in this embodiment, a slide mold component (first slide mold component) is inserted from the opening 303 side to form the hollow part, and a slide mold component (first slide mold component) is inserted from the opening 303 side to form the edge 302 of the opening 301. In combination with the second slide mold part), it is possible to form a hollow part while keeping the opening 301 as small as possible.

FIG. 4 is a cross-sectional view showing an example of the relationship between the slide mold component and the male mold 106. In FIG. 4, (A) shows the case where only a single slide mold part 401 is used, and (B) shows the case where slide mold parts 411 and 412 are used.

In FIG. 4(A), the slide mold component 401 is inserted from the bottom side of the male mold 106, and the top side protrudes. Thereby, a hollow molded product 400 can be molded. However, at this time, the opening on the top side of the molded product 400 must be in such a form that it does not interfere with the removal of the slide mold component 401.

On the other hand, in FIG. 4B, a slide mold component 411 is inserted from the bottom side of the male mold 106, and a slide mold component 412 is inserted from diagonally above the male mold 106 into the top side. Thereby, a hollow molded article 410 can be molded. In this way, the slide mold component 411 and the slide mold component 412 are inserted and removed from different sides of the mold. At this time, the shape of the opening on the top side of the molded product 410 is defined by the combination of the slide mold part 411 and the slide mold part 412. That is, the first part of the opening that does not interfere when the slide mold part 411 is pulled out is formed by the slide mold part 411, and the remaining second part is formed by the slide mold part 412 when the slide mold part 412 is pulled out. It can be formed as long as it does not become a hindrance. Alternatively, the entire opening (particularly the edge) may be formed by the slide mold part 412. Thereby, it is possible to realize a shape that could not be formed with a single slide mold part by using a plurality of slide mold parts pulled out in different directions.

Next, with reference to FIG. 5, the configuration of the hollow portion of the molded product 300 will be described. FIG. 5(A) shows an example of the cross-sectional configuration of the molded product 300 viewed from one direction in the AA cross section of the molded product 300 in FIG. 3(A). FIG. 5(B) shows an example of the cross-sectional configuration of the molded product 300 taken along the line AA in FIG. 3(A) when the molded product 300 is viewed from a direction opposite to one direction.

At this time, a range corresponding to the inner wall portion 501 continuous from the lower opening 303 of the molded product 300 can be molded by a first slide mold component corresponding to the slide mold component 411 of FIG. 4. Further, the area corresponding to the edge 302 of the opening 301 of the molded article 300 in FIG. 3 can be molded by a second slide mold component corresponding to the slide mold component 412 in FIG. 4. In this way, by combining the slide mold parts, it is possible to mold a molded product having a shape that could not be molded with a single slide mold part.

Next, an example of a runner structure for securing an insertion/extraction path for slide mold components will be described with reference to FIG. 6. FIG. 6(A) is a diagram showing an example of a state in which the slide mold component is inserted, and FIG. 6(B) is a diagram showing an example of a state in which the slide mold component is removed. In addition, in FIG. 6, the male mold 106 and the female mold 118 are omitted.

As shown in FIG. 6(A), a slide mold component 602 is inserted into a molded article 601. At this time, the molded product 601 is connected to the runner 603. A runner part 603 of the runner that is present in the insertion/extraction direction of the slide mold part has a shape that bypasses (or straddles) the slide mold part 602. Thereby, as shown in FIG. 6(B), an insertion/extraction path for the slide mold part 602 is secured, so that the runner part 603 does not get in the way during insertion/extraction. If the runner part 603 is located in a position overlapping the slide mold part 602, it becomes impossible to inject the molding material into the runner groove, or the runner must be destroyed and the slide mold part 602 must be removed. It disappears. Therefore, in this embodiment, a runner groove is formed in at least one of the male mold 106 and the female mold 118 so as to bypass the slide mold component 602 or its insertion/extraction path.

Although FIG. 6 shows a case where the runner part 603 is provided only in one direction, when using the above-mentioned two slide mold parts or more slide mold parts, each slide mold part The runners located in the insertion/extraction direction of the component are arranged in a detour so as to secure an insertion/extraction path for the slide mold component.

According to the molding die corresponding to the above embodiment, by combining two or more slide mold parts, a molded product with a shape that could not be molded with a single slide mold part can be molded. be able to.

<Summary of embodiments>
The above embodiments at least disclose the following mold components, molding molds, and methods for molding a molded article.
(1) Placed in a molding mold consisting of a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded product corresponding to the shape of the cavity. A mold part,
A first mold component and a second mold component that are inserted and removed by sliding from a side surface of the molding mold that is perpendicular to a contact surface between the first mold and the second mold. including,
The first mold part and the second mold part form a hollow part that connects from the first opening to the second opening of the molded article.
(2) The first mold component forms an inner wall that is continuous from the first opening of the molded product, and the second mold component forms an edge of the second opening of the molded product. , the mold part described in (1).
(3) The mold component according to (2), wherein the first opening and the second opening are formed on different surfaces of the molded product.
(4) The mold component according to any one of (1) to (3), wherein the first mold component and the second mold component have different insertion/extraction directions.
(5) The first mold part and the second mold part are the mold parts according to any one of (1) to (4), which are inserted and removed from different sides of the mold. mold parts.
(6) A mold for forming, comprising the mold component according to any one of (1) to (5),
comprising a first mold and a second mold,
At least one of the first mold and the second mold has a runner groove formed so as to bypass the insertion/extraction path of the first mold part and the second mold part. Molding mold.
(7) The molding mold according to (6), wherein a molding material is injected into the molding mold in which the first mold part and the second mold part are arranged at predetermined positions. , a first step of molding a molded product made up of a plurality of parts connected to a runner;
a second step of removing the first mold component from the molding mold;
a third step of removing the second mold component from the molding mold;
a fourth step of taking out the molded product;
A method of forming a molded article, including:

The invention is not limited to the above-described embodiments, and various modifications and changes can be made within the scope of the invention.

Claims (6)

A molding mold comprising a first mold and a second mold for injecting a molding material into an internal cavity to produce a molded product corresponding to the shape of the cavity ,
A mold component disposed in the molding die ,
The mold parts are
A first mold component and a second mold component that are inserted and removed by sliding from a side surface of the molding mold that is perpendicular to a contact surface between the first mold and the second mold. including,
The first mold part and the second mold part form a hollow part that connects from the first opening to the second opening of the molded product,
A runner groove formed in at least one of the first mold part and the second mold part so as to straddle and detour the insertion/extraction path of the first mold part and the second mold part. A mold for molding . 3. The first mold part forming an inner wall continuous from the first opening of the molding, and the second mold part forming an edge of the second opening of the molding. 1. The molding die according to 1. The molding die according to claim 2, wherein the first opening and the second opening are formed on different surfaces of the molded product. The molding die according to claim 1, wherein the first mold component and the second mold component are inserted and removed in different directions. The mold according to claim 1, wherein the first mold part and the second mold part are inserted and removed from different sides of the mold. 2. The molding mold according to claim 1, wherein a molding material is injected into a molding mold in which the first mold part and the second mold part are arranged at predetermined positions, and a plurality of mold parts are formed. A molded product configured by connecting parts to a runner, the molded product including a runner formed to straddle and detour the insertion/extraction path of the first mold component and the second mold component. A first step of molding;
a second step of removing the first mold component from the molding mold;
a third step of removing the second mold component from the molding mold;
a fourth step of taking out the molded product;
A method of forming a molded article, including:

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