JPH0222015A - Metal mold and liner for the metal mold - Google Patents

Abstract

PURPOSE:To inexpensively mold a molded piece of various size by combining dummy elements of different sizes, and altering the size of the mold. CONSTITUTION:When a first product (molded piece) 1 is molded, on its stationary side liners 11-15 are combined to be fixed in a stationary mold plate 5, and on its movable side liners 6-20 are assembled to be fixed in a movable mold plate 6. Then, when a second product 2 which is larger than the first product 1 is molded, a dummy element 21 - a liner 12 - a dummy element 22 - a liner 13 - a dummy element 23 - liner 14 - a dummy element 24 are assembled at the stationary side to be fixed to the plate 5. On the other hand, on the movable side a dummy element 25 - a liner 17 - a dummy mold 26 - a liner 18 - a dummy element 27 - a liner 19 - a dummy element 28 are assembled to be fixed in the plate 6. When products of different sizes are molded, the dummy elements of different sizes may be prepared, thereby largely reducing the manufacturing cost of the metal mold.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a molding die and a nested mold for the molding die, and particularly to a molding die that shares a main body die set and an ejector mechanism and has parts of the same shape. The present invention also relates to a molding die suitable for molding various types of products having different dimensions, and a nesting mold for the molding die.

[Prior art] Among the products molded using a molding die, for example, facsimile machines and copying machines, the main body and each part have similar external shapes, and only the dimensions differ depending on the width of the paper that can be handled. There are products that come with it.

Conventionally, when molding these products, the principle was almost always one mold for one product.

In addition, conventionally, for example, as described in Japanese Utility Model Publication No. 62-1.2572, etc., it is possible to share the mold body, combine mold inserts depending on the type of product, and replace this mold insert with the mold body. There is also a technology that attaches it to a mold.

[Problems to be Solved by the Invention] However, in the conventional technology described in the above-mentioned Japanese Utility Model Publication No. 12572/1983, when molding products that have parts of the same shape but different dimensions, No consideration is given to preparing a common split mold for parts with different dimensions, preparing split molds corresponding to the length of parts with different dimensions, and combining these split molds to mold various products with different dimensions. .

Therefore, the conventional techniques described in the above-mentioned Japanese Utility Model Publication No. 62-12572 and the like have not been able to significantly reduce the time and cost for manufacturing molds.

A first object of the present invention is to provide a molding die that can mold products having parts of the same shape but different dimensions, and that can significantly reduce mold manufacturing time and cost.

A second object of the present invention is to adjust the position of the ejector pin on the main body side and the nesting mold so as not to hinder the function of the ejector pin in a mold that uses a combination of a plurality of split nesting molds. It is an object of the present invention to provide a nesting mold for a molding die that can be easily adjusted.

[Means for Solving the Problems] The first object is to provide a plurality of nested molds for molding parts with the same shape even if the types of products to be molded are different, and It is equipped with a dummy piece for molding parts with different dimensions depending on the type, and when molding a product of the minimum size, the above-mentioned insert molds are combined and fixed to a single fixed mold plate and a movable mold plate. This is achieved by configuring the above-mentioned insert die and dummy piece to be combined and fixed when molding a product having dimensions other than the minimum size.

The second purpose is to form a space inside the insert mold, and in this space, a similar ejector pin that can move back and forth in the axial direction and an elastic force that urges the short ejector pin in the backward direction are provided. This is achieved by providing a body and communicating the short ejector pin so that it can be advanced by the ejector pin on the main body side.

[Function] In the invention described in claim 1 of the present invention, even if the types of products to be molded are different, when the products to be molded are different in type, parts having the same shape are determined to be in a common nest. The product is molded using a mold, and portions with different dimensions depending on the type of product to be molded are molded using dummy pieces. Therefore, even when molding various types of products that have parts of the same shape but different dimensions, it is only necessary to prepare dummy pieces with different dimensions, which can significantly reduce mold production time and costs. It becomes possible.

Further, in the invention according to claim 2 of the present invention, a similar ejector pin that is urged in the backward direction by the projectile body is built in, and this short ejector pin is connected to the ejector pin on the main body side so that the ejector pin can be operated for advancing. Because different types of products are molded, even if the installation position of the nesting mold is changed, the through hole must be positioned precisely so that the ejector pin on the main body side can pass through the nesting mold. There is no need to provide the ejector pin, and therefore the position of the ejector pin on the main body side and the nesting mold can be easily adjusted in order to exhibit the function of the ejector pin.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 3 show one embodiment of the present invention.
The figure is a vertical cross-sectional view showing the molding state of the product with the minimum size, and Figures 2 (a), (b), and (c) show the process of forming the first product, which is the product with the minimum size. An explanatory diagram of the combination of a nesting mold and a dummy piece when molding a second product with dimensions slightly longer than the second product, and a third product with dimensions even longer than the second product. FIG. 3 is a partially enlarged longitudinal cross-sectional view showing the relationship between the child mold, the similar ejector pin, and the ejector pin on the main body side.

As shown in FIG. 1, the molding die of the embodiment shown in these figures includes a main body die set 4, an ejector mechanism 7, nested molds 11 to 15; 16 to 20, and dummy pieces 21 to 24.
; 25 to 28 and 29.30 ; 31.32.

In this embodiment, the first part has the same shape but different dimensions. Second. It is configured to be able to mold the third product 1, 2°3.

The main die set 4 has a fixed mold plate 5 and a movable mold plate 6. As can be seen from FIGS. 2(a), (b), and (c), these fixed mold plates 5 and movable mold plates 6 are used when molding various products having parts of the same shape but different dimensions. It is meant to be shared.

As shown in FIG. 1, the ejector mechanism 7 includes two ejector plates 8 and 9 and a main body ejector pin 1.
0. The main body side ejector pin 10 is
A plurality of ejector plates are arranged, each having a large diameter head sandwiched and fixed between the ejector plates 8 and 9.

The nesting molds 11 to 15 are fixed inside the fixed mold plate 5 as stationary nesting molds. On the other hand, the input type 1
6 to 20 are fixed inside the movable mold plate 6 as movable nested molds. Said insert type 11-15; 16-
20, nested molds 12 to 14; 17 to 19 are products having parts of the same shape but different dimensions, as shown in Fig. 1 and Figs. 2 (b) and (C). 1゜Second. Part A with the same shape in the third product 1, 2.3
, B, C, and other nested molds 11
．． 15; 16.20 are used as spacers during molding of the first product 1.

As shown in FIG. 2(b), the dummy pieces 21 to 24 are placed inside the fixed mold plate 5 as fixed side dummy pieces during molding of the second product 2. It is fixed in combination with 14. On the other hand, the dummy pieces 25-2
8, as shown in FIG. 2(b), is placed inside the movable template 6 as a dummy piece on the movable side during molding of the second product 2.
It is fixed in combination with the movable nested molds 17 to 19. The dummy pieces 21 to 24; 25 to 28 are the second
The second product 2 is formed so as to be able to mold a longer part than the first product 1.

18= As shown in FIG. 2(c), the dummy pieces 29 and 30 are placed inside the fixed mold plate 5 as dummy pieces on the fixed side during molding of the third product 3. It is fixed in combination with molds 12 to 14. On the other hand, the dummy piece 31.3
2, as shown in FIG. 2(c), is placed inside the movable mold plate 6 as a dummy piece on the movable side during molding of the third product 3.
It is fixed in combination with the movable nested molds 17 to 19. And the dummy pieces 29.30; 31.32
is formed so as to be able to mold a portion of the third product 3 that is longer than the first and second products 1 and 2.

Said nested molds 11-15; 16-20. Dummy piece 21
~24; 25-28 and 29.30; 31.32
The fixed mold plate 5 and the movable mold plate 6 are attached using bolts 33 or a clamper (not shown) as shown in FIG.
It is removably attached to and used.

Furthermore, as shown in FIG. 2(a), the nested molds 11 to 15
As shown in FIG. 2(b), the dimensions of the combined state of the dummy piece 21 - the human mold 12 - the dummy piece 22 - the nested mold 13 −
Dimensions of dummy piece 23 - person type 14 - dummy piece 24 combined, dummy piece 25 - person type 17 dummy piece 2
6-Nesting mold 18-Dummy piece 27-Human mold 19-Dummy piece 28 As shown in FIG. 13 - Dummy piece 3 - Dimensions of the combination of nesting mold 14 and nesting mold 1
7 - dummy piece 31 - child mold 18 - dummy piece 32 - nested mold 19 The combined dimension is equal to the inner dimension of the fixed mold plate 5 and the movable mold plate 6, and the fixed mold plate 5 and the movable mold plate 6.

In this embodiment, the nesting mold 18 fixed at the center of the movable nesting molds 17 to 19 is the first one, the second one, and so on.
When molding the third product 1, 2.3, the mounting does not need to be repositioned. As shown in FIGS. 1 and 3, this nesting mold 18 is provided with a through hole 34 through which the main body ejector pin 10 passes through the cavity.

Of the nesting molds 17 to 19 on the movable side, the nesting molds 17 and 19 attached to both sides of the nesting mold 18 are shown in FIG.
), (bL As can be seen from (C), when the first, second and third products 1, 2, and 3 are molded, they are respectively displaced and attached to the appropriate positions. 3
As shown in the figure, a space 35 is formed inside.

A similar ejector pin 36 is provided in the space 35 so as to be movable in the axial direction. Ejector pin 36 of the above type
is biased in the backward direction by a compression spring 38 serving as a resilient body provided between the ceiling of the space 35 and a flange 37 attached to the intermediate portion of the similar ejector pin 36. Further, the ejector pin 36 is connected to the ejector pin 10 on the main body side so that it can be advanced by the ejector pin 10 on the main body side and eject the product when taking out the product. In addition, the mounting position can be changed using the insert type 1.
9 also has a built-in short ejector pin 36 and a compression spring 38 that biases the short ejector pin in the backward direction, but these are omitted in the drawing.

The movable side dummy pieces 25 to 28; 31, 32 are provided with escape holes 39, as shown in FIG. 3, as necessary, allowing the ejector pin 10 on the main body side to enter therein.

Of the main body ejector pins, the main body ejector pin 10 that fits into the through hole 34 provided in the nesting die 18 at the center of the movable side is formed to a length that allows the product to be directly ejected. As can be seen from FIGS. 1 and 3, the ejector pin 10 on the main body side, which is implanted at a position corresponding to the telescoping mold 17° 19 on the movable side, is ejected via the similar ejector pin 36 built into the telescoping mold. so that the product can be pushed out
It is relatively short. Further, the main body side ejector pin 1o provided at a position corresponding to the movable side nesting die 17.19 is the first. Second. When molding the third products 1, 2.3, the mounting position may be changed according to the position of the nesting mold 17.19. Second. Third product 1, 2.3
The movable side dummy pieces 26 and 27 are provided in advance at respective positions corresponding to the nesting molds 17 and 19 during molding.
1 and 32 may be provided with the escape hole 39 for the ejector pin on the main body side.

The molding die and nesting die of the above embodiment are used and function as follows.

First, when molding the first product 1,
As shown in FIG. Use it by fixing it to

Thereby, the first product 1 having the dimension a□ can be molded between the fixed side nesting molds 12 to 14 and the movable side nesting molds 17 to 19.

Next, when molding a second product 2 that has the same shape as the first product 1 and has longer dimensions than the first product 1,
As shown in FIG. 2(b), on the fixed side, the dummy piece 21 - the human child type 12 - the dummy piece 22 - the nested type 13 - the dummy piece 23 -
The nesting die 14 and the dummy piece 24 are combined and fixed inside the fixed die plate 5. On the other hand, on the movable side, a dummy piece 25, a human mold 17, a dummy piece 26, a nested mold 18, a dummy piece 27, a human mold 19, and a dummy piece 28 are combined and fixed inside the movable template 6 for use.

By using a combination of the insert mold and the dummy piece, it is possible to produce a type that has the same shape as the first product 1 but has different dimensions, that is, the dimension is longer than the first product 1.
In other words, the second product 2 with I12>Q can be molded.

Next, the first. When molding a third product 3 that has parts of the same shape as the second products 1 and 2 and has longer dimensions than the second product 2, as shown in FIG. The side is nested type 12 - dummy piece 29 - human child type 13 - dummy piece 3
〇-The nesting molds 14 are combined and fixed inside the fixed mold plate 5, and the movable side is the nesting mold 17-dummy piece 31-human mold 18-
The dummy piece 32 and the nesting die 19 are combined and fixed inside the movable template 6 for use.

As a result, the above-mentioned first. It has a part with the same shape as the second products 1 and 2 and is longer in dimension than the second product 2,
In other words, the third product 3 with Q3 > yt can be molded.

In addition, the fixed side uses nested molds 12 to 14, and the movable side uses nested molds 17 to 19, and these nested molds and the above-mentioned FIG.
), dummy piece 21-24 i 25-2 shown in (c)
8 and 29, 30; 31. By combining dummy pieces with different dimensions from 32, the first. Second.
It is possible to freely mold products with dimensions that are further different from the third products 1, 2.3.

When combining and fixing the nesting molds and dummy pieces, the nesting mold 18 at the center of the movable side is fixed in position in this embodiment, so there is no problem with the positional relationship with the ejector pin 10 on the main body side. Since the nesting molds 17 and 19 located on both sides are installed at different positions, a problem arises in alignment with the ejector pin 10 on the main body side.

In this respect, in this embodiment, the movable side insert type]7゜19
A short ejector pin 36 is provided inside the body and is urged backward by a compression spring 38 as an elastic body, and communicated with the main body side ejector pin 10 so that the short ejector pin 36 is pushed and moved forward.

As a result, the installation is a nested type that requires changing the position],
7.1.9 Positioning can be performed more easily than in the case where a through hole is provided for the ejector pin on the main body side.

After molding and curing the product, the mold is opened, the ejector mechanism 7 is moved forward, and the product is taken out. In this case, in this embodiment, the first. 2nd゜3rd product 1, 2.3
During the molding process, the movable center inserting die 18 is kept in a fixed position, so the main body side ejector pin 10 protrudes through the through hole 34 provided therein, and the inserting die 18 located on both sides of the inserting die 18 protrudes through the through hole 34 provided therein. In the child molds 17 and 19, the built-in short ejector pin 36 is advanced by the ejector pin 10 on the main body side, and the short ejector pin 36 protrudes and becomes the first.
2nd and 3rd products 1, 2.3 are each pushed out.

Furthermore, when the ejector mechanism 7 is operated backward after ejecting the product, the ejector pin 10 on the main body side moves back together with the ejector plates 8 and 9, and at this time, the short ejector pin 36 is built into the nesting mold 17.19. Due to the action of the compression spring 38, it is automatically returned to the retracted position.

[Effects of the Invention] According to the invention described in claim 1 of the present invention explained above,
Even if the types of products to be molded are different, when comparing products of different types to be molded, parts with the same shape are molded with a common nesting mold, and even if the types of products to be molded are different, Parts with different dimensions are molded using dummy pieces. Therefore, even when molding various types of products that have parts of the same shape but with different dimensions,
Since it is sufficient to prepare dummy pieces with different dimensions, the mold manufacturing time and cost can be significantly reduced.

Further, according to the second aspect of the present invention, a short ejector pin that is urged in the backward direction by the projectile body is built in, and this short ejector pin is connected to the main body side ejector pin so that it can be advanced. Because different types of products are molded, even if the mounting position of the nesting mold is changed, the ejector pin on the main body side must be inserted into the nesting mold so that it is accurately positioned. There is no need to provide a hole, and therefore the position of the ejector pin on the main body side and the nesting mold can be easily adjusted in order to exhibit the function of the ejector pin.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention.
The figure is a vertical cross-sectional view showing the molding state of the product with the minimum size, and Figures 2 (a), (b), and (C) show the process of forming the first product, which is the product with the minimum size. An explanatory diagram of the combination of a nesting mold and a dummy piece when molding a second product with dimensions slightly longer than the second product, and a third product with dimensions even longer than the second product. FIG. 3 is a partially enlarged vertical sectional view showing the relationship between the child mold, the short ejector pin, and the ejector pin on the main body side. 1 to 3... First to third products, 4... Main body side die set, 5... Fixed template, 6... Movable template, 7...
Ejector mechanism, 10... Main body side ejector pin, 1
2 to 14...Fixed-side nesting molds for molding parts with the same shape of the product, 17-19...Movable-side nesting molds as well, 21-24...Fixed-side dummy pieces , 25-28
...Dummy piece on the movable side, 29.30...Dummy piece on the fixed side, 31.32...Dummy piece on the movable side, 34...
- Through hole for main body side ejector pin, 35... Space inside movable side telescoping type, 36... Short ejector pin, 38... Compression spring as an elastic body. Agent Patent Attorney Tadashi Akimoto Minoru O～totn■■

Claims (1)

[Claims] 1. In a mold for molding products having parts of the same shape and different dimensions, for molding parts of the same shape even if the types of products to be molded are different. It is equipped with multiple nested molds and dummy pieces for molding parts with different dimensions depending on the type of product to be molded. When molding a product, the insert molds are combined and fixed,
A molding die characterized in that the insert die and a dummy piece are combined and fixed when molding a product having dimensions other than the minimum size. 2. In a molding die in which a plurality of nested molds are combined and fixed to a single fixed mold plate and a movable mold plate, a space is formed inside the nested mold, and this space is A short ejector pin that can move forward and backward in the axial direction and a bullet that urges the short ejector pin in the backward direction are provided in the part, and the short ejector pin is connected so that it can be advanced by the ejector pin on the main body side. A nesting mold for a molding die, which is characterized by: