JPH072023U - Mold - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a molding die that homogenizes a plurality of molded products simultaneously molded. [Structure] The upper mold 1, the middle mold 2, and the lower mold 3 are combined.
An upper cavity 4 is formed between the upper die 1 and the middle die 2, and a lower cavity 5 is formed between the middle die 2 and the lower die 3, respectively. A spring A8 is arranged between the upper mold 1 and the middle mold 2, and a spring B9 is arranged between the middle mold 2 and the lower mold 3, respectively. The upper mold 1 is held in a state of being separated from the middle mold 2 by the urging force of the spring A8. The urging force of the spring B9 holds the middle mold 2 in a state of being separated from the lower mold 3. As a result, the fabric is not preloaded. Also, the spring A
The urging forces of the spring 8 and the spring B9 are set so that the material A6 and the material B7 are simultaneously compressed when the mold is clamped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a molding die, for example, a molding die adapted to obtain a molded product by compression vulcanizing a material made of a rubber-like elastic material or the like.

[0002]

[Prior art and its problems]

 Conventionally, as this type of molding die, for example, one shown in FIG. 8 is known. That is, the forming die shown in FIG. 8 includes an upper die 21, a middle die 22 and a lower die 23, an upper cavity 24 is provided between the upper die 21 and the middle die 22, and a middle die 22 and a lower die 23. Lower cavities 25 are formed between them. Then, the doughs 26 and 27 are placed in the cavities 24 and 25, respectively, and then the molds are clamped, so that the doughs 26 and 27 are compression-molded to obtain a molded product having a predetermined shape.

In FIG. 8, the upper die 21 and the lower die 23 can be brought into contact with and separated from the middle die 22, respectively. The middle die 22 is brought into contact with the upper surface of the lower die 23, and the upper die 21 is brought into contact with the upper surface of the middle die 22, so that the middle die 22 is interposed between the upper die 21 and the lower die 23. Will be combined in.

At this time, a mold surface having a predetermined shape is formed on the lower surface of the upper mold 21, and a mold surface having a predetermined shape is formed on the upper surface of the middle mold 22, whereby the upper mold 21 and the middle mold 22 are formed. When the above conditions are met, an upper cavity 24 is formed between the molds 21 and 22. Further, a mold surface having a predetermined shape is formed on the lower surface of the middle mold 22, and a mold surface having a predetermined shape is also formed on the upper surface of the lower mold 23, whereby the middle mold 22 and the lower mold 23 are separated from each other. When they match, a lower cavity 25 is formed between the molds 22 and 23.

This molding die is configured as described above. When the doughs 26 and 27 are placed in the cavities 24 and 25 and then the mold is clamped, the doughs 26 and 27 are compressed and vulcanized to a predetermined size. Shaped molded products can be obtained.

First, an unvulcanized material B27 made of a rubber-like elastic material is placed on the mold surface of the lower mold 23, and the upper surface of the middle mold 22 has the same rubber-like elasticity as the material B27. The unvulcanized dough A26 made of wood is placed. Then, in that state, the middle mold 22 is fitted on the lower mold 23, and the upper mold 21 is fitted on the middle mold 22, whereby the respective molds 21, 22, 23 are combined. As a result, the mold closing is performed with the cloth A26 and the cloth B27 in the upper cavity 24 and the lower cavity 25, respectively.

Then, by performing mold clamping with a press machine (not shown), the material A26 in the upper cavity 24 is compressed by the upper mold 21 and the middle mold 22, and the material B27 in the lower cavity 25 is compressed with the middle mold 22 and the lower mold 22. It is compressed by the mold 23, and in that state, the material A26 and the material B27 are vulcanized and molded. As a result, molded products having a predetermined shape can be obtained in the upper cavity 24 and the lower cavity 25.

However, in such a conventional mold, the quality of the molded product obtained in the upper cavity 24 and the quality of the molded product obtained in the lower cavity 25 may differ from each other.

In other words, when the doughs 26, 27 are put into the cavities 24, 25 respectively, and then the molds 21, 22, 23 are combined, a preload acts on the doughs 26, 27 due to the weight of the molds. The dough 26, 27 was sometimes deformed before the pressure was applied.

First, the dough B27 is placed in the lower cavity 25, the dough A26 is placed in the upper cavity 24, and the middle die 22 is placed on the lower die 23 and the upper die 22 is placed on the middle die 22, as shown in FIG. The molds 21, 22 and 23 are combined with each other while the mold 21 is sequentially positioned to close the mold. Then, the weight of the upper die 21 is applied to the dough A26 in the upper cavity 24, and the weight of the upper die 21 and the medium die 22 is applied to the dough B27 in the lower cavity 25, respectively. You will receive preload.

In this case, the cloth B27 of the lower cavity 25 is subjected to a larger preload than the cloth A26 of the upper cavity 24 because the weight of both the upper mold 21 and the middle mold 22 is applied. As a result, the material B27 of the lower cavity 25 is deformed more than the material A26 of the upper cavity 24 before the mold clamping.

Therefore, due to the difference in the amount of deformation between the cloth A26 and the cloth B27 before the mold clamping, when the mold is clamped by the press machine, the cloth A26 completes the compression before the cloth B27. This causes a difference in vulcanization time between the material A26 and the material B27. As a result, the molded product obtained from the material A26 of the upper cavity 24 and the molded product obtained from the material B27 of the lower cavity 25 have different qualities.

Further, when the mold is clamped by the press machine, due to the difference in the molding pressure that acts, there is a difference in the compression completion timing between the material A26 of the upper cavity 24 and the material B27 of the lower cavity 25. Become.

That is, when the press pressure acts in a state where the respective dies 21, 22, 23 are combined, the material A26 of the upper cavity 24 is affected by the weight of the upper die 21 in addition to the press pressure, but the lower cavity In addition to the press pressure, the weight of both the upper mold 21 and the middle mold 22 acts on the dough B27 of No. 25. Therefore, the dough B27 of the lower cavity 25 completes compression before the dough A26 of the upper cavity 24 and starts vulcanization earlier.

That is, when the compression by the press is started from the state shown in FIG. 9, first, the dough B27 of the lower cavity 25 completes the compression as shown in FIG. 10, and then the upper cavity as shown in FIG. The compression of 24 doughs A26 is completed. Therefore, the dough B27 of the lower cavity 25 has a longer vulcanization time than the dough A26 of the upper cavity 24 because the compression start time is earlier. The quality of the molded product obtained from the dough B27 is different.

An object of the present invention is to solve the above-mentioned problems and to provide a molding die capable of simultaneously molding doughs respectively arranged in the cavities between the respective dies.

[0017]

[Means for solving problems]

 In order to solve the above-mentioned problems, this invention forms a cavity between each mold by combining a plurality of molds that can be contacted and separated in the vertical direction, arranges the dough in each cavity, and then performs compression molding. A urging member for urging the respective molds in a direction in which the respective molds are separated from each other is disposed between the respective molds. When the molds are clamped in a state of being separated from each other, the molds are made to approach each other against the biasing force, and the molds are brought into contact at the same time.

[0018]

[Action]

 This device adopts the above-mentioned means, so that the preload does not act on the material before the mold clamping. That is, in the normal state, the dies are not compressed and deformed because the dies are held by the urging force of the urging member in a state in which the dies are separated from each other at a predetermined interval. Therefore, the molding conditions can be stabilized by the fact that no preload acts on the dough.

Further, when the molds are clamped, the respective molds are brought into contact with each other at the same time, so that the respective fabrics arranged in the cavities formed between the respective molds can simultaneously complete the compression. . For this reason, the vulcanization time of each material is the same, so that it is possible to make the quality of the molded product molded by each material uniform.

[0020]

【Example】

 Embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a diagram showing an outline of this device. That is, the mold shown in FIG. 1 is composed of an upper mold 1, a middle mold 2, and a lower mold 3, an upper cavity 4 is provided between the upper mold 1 and the middle mold 2, and a middle mold 2 and a lower mold 3 are formed. Lower cavities 5 are formed between them. Then, a spring A8 is arranged between the upper mold 1 and the middle mold 2 to urge the two molds 1 and 2 in the direction of separating them from each other. A spring B9 is arranged between the middle mold 2 and the lower mold 3 to urge the molds 2 and 3 in a direction in which they are separated from each other. When the doughs 6 and 7 are placed in the cavities 4 and 5 and then the molds are clamped, the doughs 6 and 7 are simultaneously compression-molded to obtain a molded product having a predetermined shape.

In FIG. 1, the upper mold 1 can contact and separate from the middle mold 2, and the middle mold 2 can contact and separate from the lower mold 3. Then, by contacting the middle mold 2 on the upper surface of the lower mold 3 and the upper mold 1 on the upper surface of the middle mold 2, the middle mold 2 is interposed between the upper mold 1 and the lower mold 3. Will be combined in.

At this time, a mold surface having a predetermined shape is formed on the lower surface of the upper mold 1, and a mold surface having a predetermined shape is formed on the upper surface of the middle mold 2, whereby the upper mold 1 and the middle mold 2 are formed. When the above conditions are met, the upper cavity 4 is formed between the molds 1 and 2. Further, a mold surface having a predetermined shape is formed on the lower surface of the middle mold 2, and a mold surface having a predetermined shape is also formed on the upper surface of the lower mold 3, whereby the middle mold 2 and the lower mold 3 are aligned with each other. At this time, the lower cavity 5 is formed between the molds 2 and 3.

The upper mold 1 is provided with a spring A8 which is a biasing member. The spring A8 is a so-called compression coil spring, one end of which is attached to the lower end surface of the upper mold 1 and the other end of which can contact the upper surface of the middle mold 2. As shown in FIG. 4, a plurality of springs A8 are arranged equidistantly with respect to the upper mold 1. Thus, when the upper mold 1 and the middle mold 2 are combined, the spring A8 is interposed between the upper mold 1 and the middle mold 2, and the spring A8 separates the upper mold 1 from the middle mold 2. It is designed to be urged upward in the state.

The middle die 2 is provided with a spring B9 which is a biasing member. This spring B9 is a so-called compression coil spring, one end of which is attached to the lower end surface of the middle mold 2 and the other end of which can abut on the upper surface of the lower mold 3. As shown in FIG. 4, a plurality of springs B9 are arranged equidistantly with respect to the middle mold 2. Thus, when the middle mold 2 and the lower mold 3 are combined, the spring B9 is interposed between the middle mold 2 and the lower mold 3, and the middle mold 2 is separated from the lower mold 3 by the spring B9. It is designed to be urged upward in the state.

At this time, the spring B9 has a larger biasing force than that of the spring A8. When the molds 1, 2 and 3 are sequentially combined by the urging force of the spring A8 and the spring B9, between the upper mold 1 and the middle mold 2 and between the middle mold 2 and the lower mold 3. The upper die 1 and the middle die 2 are held in a state where they are separated by a predetermined distance.

The biasing forces of the spring A8 and the spring B9 are set so that the molds 1, 2, and 3 simultaneously contact each other when the mold is clamped. That is, when the molds 1, 2 and 3 are combined and then clamped, the mold clamping force causes the springs A8 and B9 to be compressed and deformed so that the molds 1, 2 and 3 come close to each other. However, at this time, the biasing forces of the springs A8 and B9 are designed so that the time when the upper mold 1 contacts the middle mold 2 and the time when the middle mold 2 contacts the lower mold 3 at the same time.

Next, the operation of the above will be described. This molding die is configured as described above. When the doughs 6 and 7 are placed in the cavities 4 and 5 and then the molds are clamped, the doughs 6 and 7 are compression-vulcanized and molded into a predetermined shape. Goods are available.

First, an unvulcanized cloth B7 made of a rubber-like elastic material is placed on the mold surface of the lower mold 3, and the upper mold surface of the middle mold 2 has the same quality as the cloth B7. The unvulcanized material A6 made of the rubber-like elastic material is placed. Then, in that state, the middle mold 2 is combined with the lower mold 3, and the upper mold 1 is combined with the middle mold 2. As a result, the cloth A6 is arranged in the upper cavity 4 and the cloth B7 is arranged in the lower cavity 5. At this time, the upper mold 1 is separated from the middle mold 2 by the biasing force of the spring A8, and the middle mold 2 is separated from the lower mold 3 by the biasing force of the spring B9.

Then, the material A 6 in the upper cavity 4 is compressed by the upper mold 1 and the middle mold 2 by performing mold clamping with a press machine (not shown), and the material B 7 in the lower cavity 5 is compressed into the middle mold 2. It is compressed by the lower mold 3 and, in that state, the dough A6 and the dough B7 are vulcanized. As a result, molded products having a predetermined shape can be obtained in the upper cavity 4 and the lower cavity 5.

Further, in the above-mentioned molding die, the molded product obtained in the upper cavity 4 and the molded product obtained in the lower cavity 5 can be made to have the same quality.

That is, by arranging the spring A8 between the upper mold 1 and the middle mold 2 and the spring B9 between the middle mold 2 and the lower mold 3, respectively, the respective molds 1, 2 and 3 are combined. In addition, in the state before the mold clamping, preload is not applied to the cavities 6 and 7 arranged in the cavities 4 and 5.

In other words, when the upper mold cavity 4 and the lower mold cavity 5 are arranged with the cloth A6 and the cloth B7, respectively, when the molds 1, 2, and 3 are sequentially combined, the state as shown in FIG. Has become. At this time, the upper die 1 is in a state in which the press pressure is not yet applied to the respective die 1, 2, 3 and the upper die 1 is urged by the biasing force of the spring A8 arranged between the upper die 1 and the middle die 2. The mold 2 is kept at a predetermined distance from the middle mold 2, and the middle mold 2 is kept at a predetermined distance from the lower mold 3 by the urging force of a spring B9 arranged between the middle mold 2 and the lower mold 3. There is.

Therefore, when the upper mold 1 is held in a floating state by the urging force of the spring A8 in the state before the mold clamping, the material A6 of the upper cavity 4 becomes the upper mold 1 and the middle mold 2. The normal state will be secured without being compressed. Further, at this time, since the middle die 2 is also held in a floating state by the biasing force of the spring B9, the material B7 of the lower cavity 5 is not compressed between the middle die 2 and the lower die 3 and is in a normal state. Will be ensured.

As a result, since the dough A6 and the dough B7 before the mold clamping are not subjected to the compressive deformation, the amounts of deformation of the dough A6 and the dough B7 at the time of the mold clamping become equal, so that the simultaneous compression is possible. Will be able to.

Then, as shown in FIG. 5, when the molds 1, 2, and 3 are combined, press pressure is applied from the vertical direction of the molding mold to clamp the mold, and the material of the upper cavity 4 is formed. A6 and the cloth B7 of the lower cavity 5 are simultaneously compression-molded.

First, when the die is clamped from the state shown in FIG. 5 by the press pressure, the upper die 1 resists the urging force of the spring A8 and the spring B9 by the action of the press pressure as shown in FIG. And the middle die 2 moves downward against the urging force of the spring B9 so that the upper die 1 and the middle die 2 and the middle die 2 and the lower die 3 are close to each other at the same time. Move to.

At this time, the spring A8 and the spring B9 have a time point when the upper die 1 and the middle die 2 come into contact with each other and a time point when the middle die 2 and the lower die 3 come into contact with each other when the mold clamping force acts on the molding die. Energizing forces are set so that and become simultaneously. Therefore, at the end of the mold clamping by the press pressure, as shown in FIG. 7, the dough A6 of the upper cavity 4 and the dough B7 of the lower cavity 5 simultaneously complete the compression.

Therefore, by simultaneously compressing the dough A6 of the upper cavity 4 and the dough B7 of the lower cavity 5, the dough A6 and the dough B7 can have the same vulcanization time. The molded product obtained from the fabric A6 and the molded product obtained from the fabric B7 can have the same quality.

It should be noted that, in the above-mentioned embodiment, the molding die formed by the upper die 1, the middle die 2 and the lower die 3 is shown, but the present invention is not limited to this. That is, the molding die may be formed of a plurality of dies, and a cavity may be formed between the dies.

[0040]

[Effect of device]

 As described above, according to the present invention, the urging members are arranged between the respective dies, and the dies are normally held by the urging force of the urging members so that the dies are separated from each other. Before tightening, the fabric placed between the molds is not preloaded by the mold's own weight. Therefore, the molding conditions are stable, and the quality of the obtained molded product can be stabilized.

Further, when the molds are clamped, the respective doughs arranged in the cavities between the respective molds are simultaneously compressed, so that the vulcanization times of the respective doughs arranged in the respective cavities are the same. Therefore, there is an effect that the quality of a large number of molded products obtained at the same time can be made uniform.

[Brief description of drawings]

FIG. 1 is a schematic view of a mold according to the present invention.

FIG. 2 is a plan view showing an embodiment of a molding die according to the present invention.

FIG. 3 is a vertical cross-sectional view of FIG.

FIG. 4 is a cross-sectional view of FIG.

FIG. 5 is a first diagram illustrating the operation of the molding die according to the present invention.

FIG. 6 is a second diagram illustrating the operation of the molding die according to the present invention.

FIG. 7 is a third diagram illustrating the operation of the molding die according to the present invention.

FIG. 8 is a diagram showing a conventional example.

FIG. 9 is a first diagram illustrating the operation of the conventional example.

FIG. 10 is a second diagram illustrating the operation of the conventional example.

FIG. 11 is a third diagram illustrating the operation of the conventional example.

[Explanation of symbols]

 1, 21 ... upper mold 2, 22 ... middle mold 3, 23 ... lower mold 4, 24 ... upper cavity 5, 25 ... lower cavity 6, 7, 26, 27 ... dough 8, 9 ... spring (Biasing member)

Claims (1)

[Scope of utility model registration request] 1. A plurality of molds (1) capable of contacting and separating vertically
The cavities (4) and (5) are formed between the molds (1), (2) and (3) by combining (2) and (3), and the fabrics (6) and (7) are formed in the cavities (4) and (5). A mold for arranging and then performing compression molding, wherein each of the molds (1), (2), (3)
An urging member (8) (9) for urging the respective molds (1) (2) (3) in a direction in which they are separated from each other is disposed therebetween, and the urging members (8) and (9) are in a normal state. Then, by the urging force, the respective molds (1), (2) and (3) are held at a predetermined distance from each other, and when the molds are clamped, the respective molds (1), (2)
A molding die characterized in that (3) is brought close to each other against an urging force, and the respective dies (1), (2) and (3) are simultaneously brought into contact with each other.