CN117428970A - Mold devices and molded products - Google Patents

Abstract

The present invention provides a mold device that can replace inserts without turning over the mold and can produce molded products of various sizes or shapes with a single mold, and molded products produced using the mold device. The upper mold has a first through-hole with an inverted convex cross-section formed with a first planar portion constituting a step, and the first insert is provided with a first enlarged diameter portion that is enlarged in diameter compared with other portions. When disposed in the first through hole, the second insert is engaged with the first flat portion. The second insert includes an insert body, a rod-shaped ejection pin for ejecting the molded product, and a rod-shaped ejection pin for ejecting the molded product. When the first ejection plate and the support component of which the pin moves are disassembled and assembled relative to the lower mold, there is no need to remove the insert body, the ejection pin, the first ejection plate and the support. The parts can be replaced in one piece.

Description

Mold devices and molded products

Technical field

The present invention relates to a mold device capable of replaceably attaching and detaching an insert, and a molded product formed using the mold device.

Background technique

In the related art, a mold device 102 shown in FIG. 7 is known as a mold device for molding a resin material. Here, the mold 104 includes an upper mold plate 104a and a lower mold plate 104b, and is configured to be in a closed state shown in FIG. 7(a) and an open state shown in FIG. 7(b) by opening and closing.

In addition, inside the mold device 102, an insert 106 that is replaceably fit-fitted into the mold device 102 is disposed as another component. The insert 106 is configured to form a molding space 108 for producing a molded article (not shown) between the female insert 106a and the male insert 106b in a closed state.

Furthermore, the ejector pins 110 are disposed vertically penetrating the lower mold plate 104b and the punch insert 106b. By raising the ejector plate 112 in the open state, the molded product in the molding space 108 is ejected, thereby ejecting the molded product from the molding space 108. Take it out from the mold device 102.

existing technical documents

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 6-285914

Contents of the invention

The problem to be solved by the invention

However, in the above-mentioned conventional mold device 102, there is a problem that it is time-consuming and labor-intensive to replace the insert 106. For example, when replacing the female mold insert 106a fixed to the upper mold plate 104a (see FIG. 8(a) ), in order to prevent the female mold insert 106a from falling off, it is first necessary to do as shown in FIG. 8(b) The upper mold plate 104a is turned over (the mold is turned over), and the fixing bolts 114 need to be removed as shown in Fig. 8(c) . Next, as shown in FIG. 9(a) , after the female mold insert 106a is removed, it is necessary to re-fix the other female mold insert 106a' used to produce a molded product of a different size or shape to the upper template 104a. , and as shown in FIG. 9(b) , it is necessary to perform a series of operations such as reinstalling the fixing bolts 114 and then flipping the mold again.

On the other hand, when replacing the punch insert 106b fixed to the lower mold plate 104b (see Fig. 10(a)), it is first necessary to remove the ejector pin 110 and the fixing member as shown in Fig. 10(b). The bolts 116 are removed from the lower template 104b. Next, as shown in Fig. 11(a) , it is necessary to re-fix the other punch insert 106b' for producing a molded product having a different size or shape to the lower mold plate 104b.

Here, as shown in Figure 11(b), when the other punch insert 106b' is re-fixed to the lower template 104b, the position of the ejector pin 110 will be different from that in the original punch insert 106b. The position of the ejector pin is inconsistent.

Therefore, in the existing mold device 102, when producing molded products of different sizes or shapes, the lower mold plate 104b cannot be shared, and one lower mold plate 104b needs to be prepared for molded products of one size or shape, so there is a problem of increased costs. .

In addition, a box-type mold is known as a small mold for injection molding (see, for example, Patent Document 1), but its strength is insufficient and it is difficult to apply it to large-scale molding or press molding.

An object of the present invention is to provide a mold device that allows inserts to be replaced without flipping the mold and that can produce molded products of various sizes or shapes with a single mold, and molded products formed using the mold device.

Methods used to solve problems

The mold device according to this embodiment is characterized by including:

A pair of upper and lower molds that can be opened and closed;

a first insert replaceably mounted on the upper mold; and

a second insert replaceably mounted on the lower mold,

The above-mentioned upper mold has a first through hole formed with a first planar portion constituting a step and having an inverted convex cross-section,

The first insert includes a first enlarged diameter portion that is enlarged in diameter compared with other portions and engages with the first flat surface when disposed in the first through hole,

The above-mentioned second insert includes: an insert main body, a rod-shaped ejection pin for ejecting the molded product, a first ejection plate for moving the above-mentioned ejection pin, and a supporting member. During installation, the insert main body, the ejection pin, the first ejection plate and the supporting member can be replaced integrally without removing the insert body.

That is, by adopting this shape of the mold device, the insert can be replaced without turning over the mold, and molded products of various sizes or shapes can be produced with one mold. In addition, since the same mold can be used to produce molded products of various sizes or shapes, cost savings can be achieved. In addition, by adopting a simple structure in which the insert itself is replaced, sufficient strength can be maintained, and it can be applied to large-scale molding or press molding requiring high pressure.

Furthermore, according to the mold device of this embodiment, the upper end of the first insert is exposed from the upper mold while being attached to the upper mold.

This allows the insert to be replaced without turning the mold over.

In addition, the mold device according to this embodiment is characterized in that the lower mold is provided with a common ejector plate, and the ejector plate uses the first ejector plate that is to be replaced together with the second insert and the ejector plate that is not used together with the second insert. The above-mentioned second ejector plates are laminated and replaced together with the second insert.

Thereby, the ejector pin can be reliably pushed out by the second ejector plate, and there is no need to replace the second ejector plate. Therefore, the burden of insert replacement work can be reduced.

Furthermore, the mold device according to this embodiment is characterized in that the mold device is used for press molding.

That is, the present invention is preferably used in a press molding die device.

The molded article of the present invention is obtained by press molding using the above-mentioned mold device.

Examples of uses of molded products produced using the above mold device include large-sized flat plates such as bathroom tiles, bathtub skirts, bathroom cabinets, wall panels, vehicle skylight materials, car chassis, pedestals, tables, benches, etc. part.

Effect of the invention

According to the present invention, it is possible to provide a mold device that allows inserts to be replaced without reversing the mold, and that can produce molded products of various sizes or shapes with a single mold. Furthermore, it is possible to provide molded products molded using the mold device.

Description of the drawings

FIG. 1 is a schematic diagram showing the opening and closing state of the press mold device according to the embodiment.

FIG. 2 is a diagram showing a process of removing a fixing bolt from a first insert in the press molding die apparatus according to the embodiment.

3 is a diagram illustrating a process of replacing the first insert with another first insert for molding a molded product of a different size or shape in the press molding die apparatus of the embodiment.

FIG. 4 is a diagram showing a preparation stage for removing the second insert from the lower mold in the press molding die apparatus according to the embodiment.

5 is a diagram illustrating a process of replacing the second insert with another second insert for molding a molded product of a different size or shape in the press molding die apparatus of the embodiment.

6 is a schematic diagram illustrating a state in which the ejector pin is projected above the second insert by raising the ejector plate in the press mold device according to the embodiment.

FIG. 7 is a schematic diagram showing the opening and closing state of the conventional mold device.

8 is a diagram showing a process of inverting the upper mold and removing the fixing bolts in the conventional mold device.

9 is a diagram showing a process of replacing the female mold insert in the upper mold of the conventional mold device with another female mold insert for molding a molded product of a different size or shape.

FIG. 10 is a diagram showing the process of removing the ejector pin from the lower mold in the conventional mold device.

11 is a diagram showing a process of replacing a punch insert in a lower mold of a conventional mold device with another punch insert for molding a molded product of a different size or shape.

Detailed ways

Hereinafter, a press molding die device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1(a) is a schematic diagram showing the closed state of the press mold device 2, and FIG. 1(b) is a schematic diagram showing the open state. As shown in FIGS. 1(a) and (b) , the press molding die device 2 includes a pair of openable and closable dies 4 composed of an upper die 4a and a lower die 4b; A pair of inserts 6.

Among them, the insert 6 includes a first insert 6a as a female mold insert embedded in the upper mold 4a and a second insert 6b as a male mold insert embedded in the lower mold 4b. In the closed state, in the first insert A molding space 9 for producing a molded product (not shown) is formed between 6a and the second insert 6b.

The upper mold 4a has a first through hole 5 in the center for inserting the first insert 6a. The first through hole 5 has an inverted convex cross-section with an enlarged diameter at the upper end. Therefore, the first flat surface portion 5 a forming a step is formed above the first through hole 5 . In addition, in this embodiment, the so-called diameter does not necessarily refer to the diameter of the cylinder, but also includes the concept of the width of a square cylinder (a cylinder with a polygonal cross-section, such as a square tube).

The first insert 6a penetrates the upper mold 4a in the first through hole 5, and has a shape in which its upper end is exposed above the press mold device 2. In addition, the first insert 6a has an inverted convex cross-section with a central depression, and has a first enlarged diameter portion 6x above the first insert 6a having a larger diameter than other portions.

Thereby, the first enlarged diameter part 6x is engaged with the first flat surface part 5a of the upper mold 4a, and the first enlarged diameter part 6x is fixed to the first flat surface part 5a with the bolt 8, so that the first insert 6a is attached. On the upper mold 4a.

In addition, in the press molding die device 2, since the mold temperature needs to be increased, steam temperature control is necessary. Therefore, the first insert 6 a is provided with a connection portion (not shown) for connecting a hose (flow path) of a steam thermostat (not shown). As this connection part, for example, a connection part that can be connected by combining a socket (the side where the hose is located) and a plug (the side where the insert 6 is located) is used. Specifically, it is preferable to use CUPLA (registered trademark of Nitto Koki Co., Ltd.) as the connecting portion.

In this way, by combining the socket and the plug for connection, the sealing function of the connection portion can be completed within the scope of the first insert 6a, and the problem of sealing deterioration will not occur when the first insert 6a is replaced.

The lower mold 4b has a lower mold main body 10, a space block 12 forming a space in which an ejector plate 20 described later is movable, and a base 14. Moreover, the lower mold body 10 also has the second through hole 16 for inserting the second insert 6b in the center. Since the second through hole 16 has an inverted convex shape, the second flat surface portion 16 a forming a step is formed above the second through hole 16 .

The second insert 6b includes a second insert main body 17, a rod-shaped ejection pin 18 for ejecting the molded product, a first ejection plate 20a (to be described later) for moving the ejection pin 18, and a support. Support part 21 of the second insert body 17 bearing the pressure pin.

Here, the second insert body 17 penetrates the lower mold body 10 in the second through hole 16 and is provided with a second enlarged diameter portion 6y whose diameter is enlarged compared with other portions. Therefore, by engaging the second enlarged diameter portion 6y with the second flat surface portion 16a of the lower mold body 10 and fixing the second enlarged diameter portion 6y to the second flat surface portion 16a with the bolts 8, the second insert main body 17 is Installed on the lower mold body 10. In addition, the second insert body 17 also has the same connecting portion as the first insert 6a.

The ejection plate 20 is configured by stacking a first ejection plate 20a through which the ejection pin 18 passes and a second ejection plate 20b that supports the lower end of the ejection pin 18 in an up-and-down reverse direction, and serves as a mechanism for ejecting the ejection pin 18 It functions as a moving action source (see Figure 6). In addition, the first ejector plate 20a is included in the second insert 6b and is replaced together with the second insert 6b, but the second ejector plate 20b is not included in the second insert 6b and is not connected with the second insert 6b. Insert 6b is replaced together.

In this way, by forming the ejection plate 20 into a double structure, the second ejection plate 20b can be used to reliably eject or retract the ejection pin 18, and there is no need to replace the second ejection plate 20b, which can reduce the installation cost. The burden of replacement work for Part 6.

The support member 21 has a function of preventing the second insert body 17 from being deformed or broken by the molding pressure, and has a cylindrical shape with a diameter of approximately 50 mm to 150 mm. In addition, it is preferable that the support member 21 is evenly arranged in a plurality of locations at intervals of about 100 mm to 300 mm so as not to overlap with the position of the ejector pin 18 .

Next, the step of replacing the first insert 6a in the upper mold 4a will be described. First, as shown in FIG. 2(a) , the bolts 8 are removed from the upper mold 4a to which the first insert 6a is attached (see FIG. 2(b) ). Next, as shown in FIG. 3(a) , the first insert 6a is suspended using a crane (not shown), and the first insert 6a is lifted from the upper mold 4a.

Next, another first insert 6a' for molding a molded product having a different size or shape from the first insert 6a is suspended using a lifting device and lowered into the first through hole 5 of the upper mold 4a. In a state where the first enlarged diameter portion 6x is engaged with the first flat surface portion 5a, the first insert 6a' is fixed to the upper mold 4a with bolts 8 (see Fig. 3(b)). In addition, in FIG. 3 , the case where the other first insert 6a' is shown as an example is used for manufacturing a molded product smaller in size or shape than the first insert 6a, but the other first insert 6a' It may be a product used for manufacturing a molded product having a larger size or shape than the first insert 6a.

In this way, the first insert 6a has an inverted convex cross-section, and the upper mold 4a has the first through-hole 5 having a step with an enlarged diameter at the upper end, thereby engaging the first insert 6a with the step of the upper mold 4a. Therefore, the first insert 6a and other first inserts 6a' can be easily replaced without turning over the mold.

Next, the procedure of replacing the second insert 6b in the lower mold 4b will be explained. First, as shown in FIG. 4(a) , the bolts 8 are removed from the second insert 6b attached to the lower mold body 10 (see FIG. 4(b) ). Next, as shown in FIG. 5( a ), the second insert 6 b is suspended by a lifting device (not shown), and the second insert 6 b is lifted from the lower mold body 10 . In addition, the second insert 6b is integrally suspended in a state including the second insert body 17, the ejection pin 18, the first ejection plate 20a, and the support member 21. On the other hand, the second ejector plate 20b remains on the base 14 of the lower mold 4b as it is.

Next, another second insert 6b' for molding a molded product having a different size or shape from the second insert 6b is suspended using a lifting device and lowered to the second through hole 16 of the lower mold body 10. With the second enlarged diameter portion 6y engaged with the second planar portion 16a, the other second insert 6b' is fixed to the lower mold body 10 with bolts 8 (see Fig. 5(b)). In addition, in FIG. 5 , the case where the other second insert 6b' is shown as an example is used for manufacturing a molded product smaller in size or shape than the second insert 6b, but the other second insert 6b' It suffices that the product is used to manufacture a molded product having a different size or shape from the second insert 6b. This is the same as the case of the first insert 6a.

In this way, the second insert 6b includes the second insert body 17, the ejection pin 18, the first ejection plate 20a and the support member 21. Therefore, the second insert 6b can be integrated with other second inserts. 6b' for replacement. This can solve the problem of inconsistent positions of the ejection pins 18 when producing molded products with different sizes or shapes (see FIG. 11(b) ). Therefore, the lower mold 4 b can be shared, and molded products of various sizes or shapes can be produced using one mold, thereby achieving cost savings.

In addition, after the second insert 6b is replaced and the molding is completed, as shown in FIG. 6, the ejector plate 20 is raised to cause the ejector pin 18 to protrude above the second insert 6b', thereby The molded product is removed from the second insert 6b'.

According to the invention of this embodiment, it is possible to provide a press molding die device 2 in which the insert 6 can be replaced without turning over the die, and molded products of various sizes or shapes can be produced with a single die. In addition, by adopting a simple structure of replacing the insert 6 itself, the insert 6 and the mold 4 can maintain sufficient strength, and can be applied to large-scale molding or stamping molding.

In addition, in the conventional mold device 102 for molding resin materials (see FIG. 7 ), a connection portion for connecting a hose (circuit) is provided outside the insert 106 , and O is attached to the end of the insert 6 ring, thereby realizing the sealing function of the insert 106. However, in this case, every time the insert 106 is replaced, the moisture at the inlet and outlet of the hose (flow path) needs to be removed. In addition, there is a problem that when the mold temperature rises, the sealing function of the insert 106 is reduced due to deterioration of the O-ring.

However, according to the invention of the embodiment, by combining the socket and the plug for connection, the sealing function of the connection portion can be completed within the range of the insert 6, and the O-ring will not be deteriorated. Therefore, the sealing function when replacing the insert 6 can be improved. In addition, since the trouble of removing moisture can be eliminated, the insert 6 can be replaced more easily.

In addition, in the above embodiment, the upper mold 4a is a fixed-side mounting plate and the lower mold 4b is a movable-side mounting plate. However, the upper mold 4a may be formed as a movable-side mounting plate and the lower mold 4b may be a movable-side mounting plate. The mold 4b is formed to fix the side mounting plate. Of course, any mold 4 can be an upper mold or a lower mold.

In addition, in the above embodiment, as long as it has a supporting function, the supporting member 21 does not necessarily need to be a cylinder, and may be replaced by a prism or the like. In addition, the arrangement interval of the support members 21 is not limited to a pitch of 100 mm to 300 mm.

In addition, in the above embodiment, the press molding mold device 2 is exemplified as the mold device, but the present invention does not exclude the injection molding mold.

In addition, in the above embodiment, as the molding material, thermoplastic resin, thermosetting resin, etc. can be used. Especially suitable for forming large-scale thermosetting resin sheet molding compounds.

Examples of uses of molded products produced using the above mold device include large-sized flat plates such as bathroom tiles, bathtub skirts, bathroom cabinets, wall panels, vehicle skylight materials, car chassis, pedestals, tables, benches, etc. part.

Symbol Description

2 Stamping mold device

4 molds

4a upper mold

4b lower mold

5 first through hole

5a first plane

6 inserts

6a first insert

6b second insert

6x first diameter expansion part

6y second diameter expansion part

8 bolts

9forming space

10 lower mold body

12 space blocks

14 base

16 second through hole

16a second plane part

17Second insert body

18 push-out pin (pull-out pin)

20 ejection plate (pull out plate)

20a first ejection plate

20b second ejection plate

21 support parts

102 mold device

104 mold

104a upper template

104b lower template

106 inserts

106a concave mold insert (upper insert)

106b punch insert (lower insert)

108 forming space

110 push pin

112 ejection plate

114 fixing bolts

116 fixing bolts.

Claims (5)

1. A mold apparatus, comprising:

a pair of upper and lower molds that can be opened and closed;

a first insert replaceably mounted to the upper die; and

a second insert replaceably mounted to the lower die,

the upper die is provided with a first through hole which forms a first plane part of the step and has an inverted convex section,

the first insert includes a first enlarged diameter portion which is enlarged in diameter as compared with other portions and which engages with the first flat surface portion when disposed in the first through hole,

the second insert includes: the insert body, the rod-shaped ejector pin for ejecting the molded article, the first ejector plate for moving the ejector pin, and the support member can be replaced integrally without removing the insert body, the ejector pin, the first ejector plate, and the support member when the insert body, the ejector pin, the first ejector plate, and the support member are attached to or detached from the lower die.

2. The mold apparatus of claim 1, wherein,

the first insert is attached to the upper die, and an upper end portion thereof is exposed from the upper die.

3. The mold device according to claim 1 or 2, wherein,

the lower mold is provided with a shared ejector plate, and the ejector plate is formed by stacking the first ejector plate which is replaced together with the second insert and the second ejector plate which is not replaced together with the second insert.

4. The mold apparatus of claim 1, wherein,

the die device is used for stamping forming.

5. A molded article, characterized in that,

the molded article is obtained by press molding using the die set according to any one of claims 1 to 4.