JPH071609A - Manufacture of rubber product with cloth - Google Patents

Abstract

PURPOSE:To obtain an apparatus for manufacturing a rubber product with cloth for preforming cloth and rubber while heating in response to a final product shape, vulcanizing the preformed cloth and rubber to connect them without necessity of separately providing a cloth preforming line and a rubber preforming line. CONSTITUTION:An apparatus for manufacturing a rubber product with cloth comprises an upper plate 11, a lower plate 13 and an intermediate plate 12 so provided as to approach to and separate from each other, cloth preforming molds for preforming cloth at the plates 11, 12, and rubber preforming molds for preforming rubber at the plates 13, 12 in such a manner that the cloth preforming mold and the rubber preforming mold of the plate 12 are formed on front and rear surfaces of the same mold.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for manufacturing a cloth-containing rubber product such as a cloth-containing diaphragm.

[0002]

2. Description of the Related Art Conventionally, cloth-containing diaphragms have conventionally been separately provided with a preform for preforming a cloth separately and a rubber preform for preforming a rubber according to the shape of the final product. It was formed by superposing and main vulcanization. Therefore, the cloth preform line and the rubber preform line existed separately.

[0003]

SUMMARY OF THE INVENTION The present invention is directed to a cloth preform line,
An object of the present invention is to obtain an apparatus for manufacturing cloth-containing rubber products which does not require a separate rubber preform line.

[0004]

SUMMARY OF THE INVENTION In the present invention, the preformed shape of cloth and rubber is
It was completed based on the idea of eliminating the need to provide separate cloth and rubber preform lines by mixing a cloth preform mold and a rubber preform mold in a set of molds.

That is, the present invention is an apparatus for manufacturing a cloth-containing rubber product, in which cloth and rubber are preformed according to the shape of the final product under heating, and the preformed cloth and rubber are vulcanized and joined. In the above, a cloth preform mold for preforming cloth on one of the upper plate and the lower plate, for example, the upper plate and the middle plate is provided by providing an upper plate, a lower plate and a middle plate which can approach and separate from each other. On the other hand, on the other hand, for example, a rubber preform mold for preforming rubber is provided on the lower plate and the middle plate, and the cloth preform mold and the rubber preform mold of the middle plate are formed on the front and back sides of the same mold. Is characterized by. According to this structure, the cloth preform and the rubber preform can be simultaneously performed in the same step by a set of dies provided on the upper plate, the middle plate, and the lower plate.

In this apparatus, an intermediate plate is further provided between the upper plate and the lower plate so as to be able to move forward and backward, and when the intermediate plate is retracted from between the upper plate and the lower plate, a mold provided on the upper plate and the lower plate is used. The main vulcanization mold for main vulcanizing the preformed cloth and the rubber can be configured. According to this, not only the cloth preform and the rubber preform but also the main vulcanization can be performed with one set of molds.

In this case, one of the cloth preform molds, in which the upper plate or the lower plate is provided with the cloth which has been preformed when the upper plate or the lower plate is separated from the middle plate. A cloth holding means for holding the upper plate or the lower plate is provided, and one of the rubber preform molds, the lower plate or the upper plate is separated from the middle plate in a mold provided on the lower plate or the upper plate. At this time, it is preferable to provide a rubber holding means for holding the preformed rubber on the lower plate or upper plate side. According to this configuration, when the middle plate is retracted from between the upper plate and the lower plate, the cloth and the rubber that have been preformed are held on the upper plate and the lower plate, respectively, so that the middle plate is retracted. The main vulcanization can be carried out immediately.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. In this embodiment, the present invention is applied to an apparatus for manufacturing a cloth-containing diaphragm. As shown in FIGS. 1 and 2, this cloth-filled diaphragm manufacturing apparatus has an upper plate 11, a middle plate 12, and a lower plate 13. These upper plate 11, middle plate 12, and lower plate 13 have an upper mold 21 and a middle mold 2, respectively.
2 and the lower mold 23 are provided. In FIG. 1, four sets are provided for the upper mold 21, the middle mold 22, and the lower mold 23. The charging cloth 20 is supplied in a size that extends over these four sets.

In this embodiment, the upper mold 21 and the middle mold 22 are
A rubber preform mold is constituted, and the middle mold 22 and the lower mold 23 are
It constitutes a cloth preform type. That is, the upper mold 21 includes a rubber preform male mold 21a (hereinafter, the rubber male mold 21a).
a) is formed, and a rubber preform female die 22a (rubber female die 22a) is formed on the upper surface of the middle die 22. A cloth preform male die 22b (cloth male die 22b) is formed on the lower surface of the middle die 22, and a cloth preform female die 23b (cloth female die 23b) is formed on the lower die 23. The shapes of the rubber male mold 21a and the rubber female mold 22a, and the cloth male mold 22b and the cloth female mold 23b are determined according to the final product shape in consideration of the thickness of the charging cloth 20 and the thickness of the rubber material. ing. FIG. 12 shows a rubber male mold 21a and a rubber female mold 22a.
FIG. 3 is an enlarged view showing a specific example of the shapes of the cloth male mold 22b and the cloth female mold 23b.

The upper die 21 is fixed to the upper plate 11 by fixing means including the fixing bolts 11a, the middle die 22 is fixed to the middle plate 12 by fixing means including the fixing bolts 12a, and the lower die 23 is fixed to the fixing bolts 13a. It is fixed to the lower plate 13 by fixing means including.

The upper plate 11 is fixed to the lower surface of the upper heating plate 14, and the lower plate 13 is fixed to the upper surface of the lower heating plate 15. As shown in FIG. 14, the lower heating plate 15 includes the hydraulic cylinder device 1
It is fixed to the upper end of a ram 17 which is raised and lowered by 6, and can move in and out of contact with the fixed upper heating plate 14. The upper heating plate 14 and the lower heating plate 15 are provided with a plurality of mutually engageable guide pins 18a, 19a and guide holes 18b, 19b that determine relative positions in the plane direction when approaching each other.

The intermediate plate 12 is movable in a direction perpendicular to the paper surface of FIGS. 2 to 7 and 14, and is supported between the upper plate 11 and the lower plate 13 so as to be movable back and forth. 2 and 1
As shown in FIG. 4 and FIG. 15, a pair of left and right guide rails 51 is formed on the lower surface of the middle plate 12, and the guide rails 51 have a plurality of rollers 52 for rotatably supporting the middle plate 12. Is rotatably supported. When the lower plate 13 rises in a state where the middle plate 12 has entered the regular position between the upper plate 11 and the lower plate 13, the middle plate 12 is pushed up by the lower plate 13 and moves to the upper plate 11 side. The upper plate 11 and the middle plate 12 are provided with a plurality of mutually engageable guide pins 24a and guide holes 24b that determine relative positions in the planar direction when approaching, and the middle plate 12 and the lower plate 13 are provided. Similarly, a guide pin 25a and a guide hole 25b are provided.

A compression coil spring 28, which is locked by retaining bolts 26 and 27 on the front and back of the intermediate plate 12,
29 are provided. This compression coil spring 28, 29
Is compressed when the upper plate 11, the middle plate 12, and the lower plate 13 approach each other, and when the approaching force is released thereafter, the upper plate 11, the middle plate 12 (upper mold 21 and middle mold 22), and the middle plate 12 and the lower plate Board 13
(Middle mold 22 and lower mold 23) are separated from each other.

Cloth pressing rings 31 and 32 are respectively supported on the outer peripheral portions of the upper mold 21 and the middle mold 22 so as to be vertically movable. The presser rings 31 and 32 have substantially the same structure, are suspended and supported by the upper plate 11 and the middle plate 12 by a plurality of retaining bolts 33, and are urged downward by a compression spring 34. . A plurality of cloth pressing pins 35 are supported on the middle plate 12 so as to be vertically movable and urged by a compression spring 36 toward the lower upper plate 11 side.

16 and 17 show the heating mechanism 4 for the middle die 22.
Indicates 0. The heating mechanism 40 heats the middle die 22 when the middle plate 12 retreats from between the upper plate 11 and the lower plate 13, and is provided in the retreat stage of the middle plate 12 shown in FIG. Below the left and right guide rails 51 in this retreat stage, a heating platen 42 that is moved up and down by a hydraulic cylinder device 41 is located. At the upper end of this heating platen 42, a blank spacer 43 is fixed. Has been done. The blank spacer 43 is a recess 4 for accommodating each element on the lower surface of the intermediate plate 12.
4 is provided.

The heating plate 42 for heating and the blank spacer 43
Moves upward to the intermediate plate 12 that has moved to the retreat stage by the hydraulic cylinder device 41, and moves the intermediate plate 12 to the roller 5
Slightly rise from 2. Due to this levitation, the blank spacer 43 and the middle plate 12 are surely brought into contact with each other, and the heat of the heating platen 42 is transferred to the middle plate 12 and the middle mold 22. Also, the middle plate 1
2 is separated from the roller 52, the heating platen 4 for heating
The heat of 2 can be prevented from being transferred to the roller 52 and the guide rail 51, and the durability of the roller 52 and the guide rail 51 can be improved. Moreover, the thermal efficiency for heating the middle mold 22 is improved.

The upper mold 21 and the lower mold 23 are always the upper heating plate 14
And is heated by the lower heating plate 15.

The present apparatus having the above-mentioned configuration is a hydraulic cylinder device 1.
In a state where the lower plate 13 is separated from the upper plate 11 by 6, the middle plate 12 is inserted into the regular position between the upper plate 11 and the lower plate 13 via the guide rail 51 and the roller 52. In this state, as shown in FIG.
The charging cloth 20 is set on b, and the unvulcanized rubber is set on the rubber female mold 22a. The charge cloth 20 is, as described above, 4
The unvulcanized rubber 3 has a size that spans the individual male mold 22b.
0 is set in each of the four rubber female molds 22a.

In this set state, when the lower plate 13 (lower mold 23) is raised by the hydraulic cylinder device 16, the lower mold 23 and the upper mold 21 come close to each other, and first, the cloth supported on the middle plate 12 is reached. The presser pin 35 contacts the charging cloth 20, and then the charging cloth 20 is pressed downward by the force of the compression spring 36 relative to the lower mold 23 and pulled around the lower mold 23. As a result, tension is applied to the cloth 20 and its wrinkles are extended (FIG. 4). Further, when the lower plate 13 rises, the middle plate 12 is also pushed up by the lower plate 13 and separated from the roller 52, and at the same time, the cloth pressing ring 32 around the middle die 22 sandwiches the charging cloth 20 with the cloth female die 23b. . At this time, the annular protrusion 32a of the cloth pressing ring 32 and the cloth female die 23b
The annular recess 23c prevents the charging cloth 20 from moving (FIG. 5). Further, when the lower plate 13 approaches the middle plate 12, as shown in FIG.
As described above, the charging cloth 20 overcomes the frictional force between the cloth male mold 22b and the cloth female mold 23b and moves little by little, and is narrowed down according to the shapes of the cloth male mold 22b and the cloth female mold 23b. At this time, the cloth pressing ring 32 presses the peripheral portion of the charging cloth 20, so that the wrinkles of the cloth 20 do not enter between the cloth male die 22b and the cloth female die 23b. As a result, the pitch between the fibers of the charging cloth 20 becomes narrower, so that the cloth pressing pin 35 is pulled by the charging cloth 20 and moves slightly upward.

On the other hand, in the process in which the lower plate 13 approaches the middle plate 12 and pushes up the middle plate 12, the guide pins 24a engage with the guide holes 24b and push up the middle plate 12.
The fitting diameter of the guide pin 24a and the guide hole 24b is such that the force applied to the lower plate 13 and the middle plate 12 is small as long as the lower plate 13 is small.
Are set to push up the middle plate 12. Therefore, the rubber female mold 22a and the rubber male mold 21a approach each other, and the unvulcanized rubber 30 between the two becomes the rubber female mold 22a and the rubber male mold 2.
The rubber is gradually deformed into the shape of 1a and is gradually vulcanized. Finally, as shown in FIG. 6, the rubber male mold 21a and the rubber female mold 22 are formed.
It is molded into the shape of a.

When the state shown in FIG. 6 is maintained for a certain period of time, the rubber male mold 21a and the rubber female mold 22a are transferred to the rubber 30 that is in a semi-vulcanized state, and the charging cloth 20 has the cloth male mold 22b.
The shape of the cloth female mold 23b is transferred, and the preforming is completed.
The preformed cloth and rubber are each
0a, called preformed rubber 30a.

When this preforming is completed, the lower plate 13 (lower heating plate 15) is lowered by the hydraulic cylinder device 16. Then, the intermediate plate 12 is also lowered, and the intermediate plate 12 is contacted with and supported by the roller 52 of the guide rail 51 on the way. After that, only the lower plate 13 descends, and as a result, the upper mold 21, the middle mold 22, and the lower mold 23 are separated from each other. In this separation process, the preformed cloth 20a and the preformed rubber 3
0a is separated from the middle mold 22 and is supported by the lower mold 23 and the upper mold 21, respectively.

Semi-vulcanized soft preformed rubber 30a
However, the reason (structure) for not adhering to the rubber female die 22b but adhering to the rubber male die 21a is as follows.

In FIG. 12, the radius A of the rubber male die 21a
Up to the square annular groove 44 of the preformed rubber 30a, a plurality of semicircular annular grooves 45 having a semicircular cross section are formed outside the product portion of the radius A, and Trapezoidal cross-section grooves 46 are formed at a plurality of circumferential positions so as to overlap the semicircular annular groove 45. Furthermore, the semicircular annular groove 4
An overflow groove 47 is formed on the outer side of 5.
Since the trapezoidal cross-section groove 46 has a diameter gradually increasing from the contact surface with the rubber female die 22a, a part of the preformed rubber 30a which has entered the groove is formed by replacing the preformed rubber 30a with the rubber male die 21a.
Holds on the side. The semicircular annular groove 45 and the overflow groove 47 also have a large surface area, so that the force for adsorbing the preformed rubber 30a to the rubber male mold 21a side is increased.
Further, the concave portion 48 in the central portion of the rubber male die 21a, which is formed as a guide for punching the central portion, also has the same secondary effect. Since the unvulcanized rubber 30 overflows and flows into these grooves at the time of molding, the preformed rubber 30a
Are securely held on the upper die 21 side.

Next, the preformed cloth 20a is the cloth pressing pin 3
It is supported by the cloth female mold 23b side. That is,
When the middle die 22 and the lower die 23 are opened, the cloth pressing ring 32 is pressed against the cloth female mold 23b by the force of the compression spring. That is, the preformed cloth 20a is sandwiched between the female cloth die 23b and the cloth pressing ring 32. Medium 22 and lower 23
When the button is further opened, the presser foot ring 32 is attached to the preformed cloth 20a.
Although it separates from the preform cloth 20a, the preform cloth 20a tries to remain on the lower mold 23 because it is pressed downward by the cloth pressing pin 35. Then, the force of the presser foot pin 35 to leave the preformed cloth 20a on the lower mold 23 is continuously exerted until the presser foot pin 35 is separated from the preformed cloth 20a. Since the cloth 20a is separated from the cloth male mold 22b, the preformed cloth 20a is surely left on the lower mold 23 side.

When the lower plate 13 descends, the guide rail 5
The intermediate plate 12 held on 1 is moved to a retreat stage manually or by the power of an air cylinder device or the like, and is heated by the heating mechanism 40. FIG. 8 shows an upper plate 11 and a lower plate 1.
It shows a state in which the intermediate plate 12 has been removed from between 3.

In the state shown in FIG. 8, the lower plate 13 is raised again by the hydraulic cylinder device 16. Then, this time, since the middle plate 12 does not exist between the lower plate 13 and the upper plate 11, as shown in FIG. 9 and FIG.
The preform cloth 20a and the preform rubber 30a are joined and main vulcanized by the rubber male die 21a of No. 1 and the cloth female die 23b of the lower die 23. At this time, the cloth pressing ring 31 around the upper mold 21 is placed between the cloth pressing ring 31 and the cloth female mold 23b.
Insert 0a. The annular protrusion 31a of the cloth pressing ring 31 and the annular recess 23c of the cloth female die 23b prevent the preformed cloth 20a from moving. When left in this state for a predetermined time, the preformed rubber 30a is fully vulcanized by the heat of the upper heating plate 14 and the lower heating plate 15, and the cloth-filled diaphragm 230 is completed.

When the main vulcanization is completed as described above, the lower plate 13 descends via the hydraulic cylinder device 16 and the upper mold 2
1 and the lower mold 23 are separated from each other. Unlike the middle die 22, the upper die 21 is not provided with the cloth pressing pin 35, and the rubber male die 2
The 1a is provided with a large number of grooves such as a concave square annular groove 44, a semicircular annular groove 45, a trapezoidal cross section groove 46, an overflow groove 47, and a concave portion 48. Therefore, the completed cloth-containing diaphragm 230 is held on the side of the upper die 21 by the action of these grooves, particularly the action of the trapezoidal cross-section groove 46. Since the rubber material formed by the trapezoidal groove 46 can be elastically deformed, it can be taken out separately from the rubber male mold 21a by pulling the cloth-containing diaphragm 230 downward. This is the end of one process.

The next step is started by inserting the middle die 22 (middle plate 12) heated by the heating mechanism 40 again between the upper plate 11 and the lower plate 13 using the guide rail 51 and the roller 52. To be done. Hereinafter, the cloth-containing diaphragm 230 is manufactured by repeating the same operation as described above.

In the above description, the upper mold 21 and the middle mold 22 constitute a rubber preform mold, and the middle mold 22 and the lower mold 23 constitute a cloth preform mold. It is also possible to form a rubber preform mold by the cloth preform mold, the middle mold 22 and the lower mold 23.

Further, although the present invention has been described above by taking a cloth-containing diaphragm as an example, the present invention can be applied to cloth-containing rubber products other than the cloth-containing diaphragm.

[0032]

As described above, in the apparatus for manufacturing a cloth-containing rubber product of the present invention, the upper mold and the middle mold, and the middle mold and the lower mold constitute the cloth preform mold and the rubber preform mold. ,
A compact manufacturing apparatus can be obtained without the need to separately provide a cloth preform line and a rubber preform line. Further, according to the second and third aspects, the preformed cloth and the rubber can be further fully vulcanized and bonded in the same device to form a cloth-containing rubber product.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an apparatus for manufacturing a cloth-containing diaphragm to which the present invention is applied.

FIG. 2 is a composite cross-sectional view of a cross-sectional view taken along line AA and line BB in FIG. 1, showing a state in which an upper plate, a middle plate, and a middle plate are separated from each other.

FIG. 3 is a cross-sectional view showing a state in which a cloth material for preform and a rubber material are set in the apparatus of FIG.

4 shows a state in which the upper plate, the middle plate, and the lower plate of the apparatus of FIG. 3 are brought close to each other, and rubber preform is performed by the upper plate and the middle plate, and cloth preform is performed by the middle plate and the lower plate. FIG.

5 shows a state in which the upper plate, the middle plate, and the lower plate of the apparatus of FIG. 3 are brought close to each other to perform rubber preform on the upper plate and the middle plate, and fabric preform on the middle plate and the lower plate. FIG.

FIG. 6 is a cross-sectional view showing a state where preforms of rubber and cloth are completed in FIGS. 4 and 5;

7 is a cross-sectional view showing a state in which an upper plate, a middle plate, and a lower plate are separated from the state shown in FIG.

8 is a cross-sectional view showing a state in which the middle plate is retracted from between the upper plate and the lower plate in the state of FIG. 7.

9 is a cross-sectional view showing a state in which an upper plate and a lower plate are brought close to each other from the state of FIG.

FIG. 10 is a cross-sectional view showing a state where the upper plate and the lower plate are further brought closer to each other and main vulcanization is performed from the state of FIG. 9.

11 is a cross-sectional view showing a state in which an upper plate and a lower plate are separated from the state shown in FIG.

FIG. 12 is an enlarged cross-sectional view showing the details of the shapes of the upper mold and the lower mold when they are closest to each other.

FIG. 13 is an enlarged cross-sectional view showing details of the shapes of the middle mold and the lower mold when they are closest to each other.

FIG. 14 is a front view showing an example of a moving mechanism of an intermediate plate.

FIG. 15 is a side view of the same.

FIG. 16 is a cross-sectional view showing a heat retaining mechanism for an intermediate plate.

FIG. 17 is a cross-sectional view showing a heat retaining mechanism for an intermediate plate.

[Explanation of symbols]

 11 Upper Plate 12 Middle Plate 13 Lower Plate 14 Upper Heating Plate 15 Lower Heating Plate 16 41 Hydraulic Cylinder Device 20 Preparation Cloth 20a Preforming Cloth 21 Upper Mold 22 Medium Size 23 Lower Mold 21a Rubber Preform Male 22a Rubber Preform Female 22b Cloth preform male type 23a Cloth preform female type 30 Unvulcanized rubber 30a Preformed rubber 31 32 Cloth pressing ring 35 Cloth pressing pin (cloth holding means) 40 Heating mechanism 42 Heating platen 46 Cross section trapezoidal groove (rubber holding means) ) 51 Guide rail 52 Roller

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area B32B 25/10 // B29K 21:00 105: 08

Claims (3)

[Claims] 1. A cloth-containing rubber product manufacturing apparatus for pre-molding cloth and rubber under heating according to the shape of the final product, and vulcanizing and bonding the pre-molded cloth and rubber to each other. An upper plate, a middle plate, and a lower plate that can approach and separate from each other are provided.A cloth preform mold for preforming cloth is provided on one of the upper plate and the lower plate and the middle plate. A rubber preform mold for preforming rubber is provided on the other side and the middle plate, and the cloth preform mold and the rubber preform mold of the middle plate are formed on the front and back of the same mold. Rubber product manufacturing equipment. 2. The intermediate plate according to claim 1, wherein the intermediate plate is capable of advancing and retracting between the upper plate and the lower plate, and in a state where the intermediate plate is retracted from between the upper plate and the lower plate, the intermediate plate is attached to each of the lower plates of the upper plate. An apparatus for manufacturing a rubber product containing cloth, wherein the provided mold constitutes a main vulcanization mold for main vulcanization of preformed cloth and rubber. 3. The cloth preform mold as claimed in claim 1, wherein the mold provided on the upper plate or the lower plate has a spare when the upper plate or the lower plate is separated from the middle plate. A cloth holding means for holding the formed cloth on the side of the upper plate or the lower plate is provided, and one of the rubber preform molds, wherein the mold provided on the lower plate or the upper plate has the lower plate or An apparatus for manufacturing a cloth-containing rubber product, which is provided with a rubber holding means for holding the preformed rubber on the lower plate or the upper plate when the upper plate separates from the middle plate.