JPH04212818A - Vulcanizing method of driving belt, etc., and vulcanizing facility - Google Patents

Abstract

PURPOSE:To provide a vulcanizing method for manufacturing a driving belt in the series flow of a vulcanizing process, a conveyor system, and a vulcanizing facility thereof regarding the vulcanizing method applied for manufacture requiring the vulcanizing process of the driving belt, etc., and the vulcanizing facility thereof. CONSTITUTION:A vulcanizing method in this invention is conducted in such a manner that a) a vulcanizing process is divided into a plurality of processes on the basis of said molding workhours and b) an unvulcanized molding 2 is moved successively together with a vulcanizing vessel 3 among heating pressure means 5A-5D at every process divided and vulcanized under said each vulcanizing process. A vulcanizing facility in this invention has pairs of mutually connectable and detachable injection and discharging devices 6B for a pressure high-temperature fluid and carrying means 4 for shifting said vulcanizing vessel 3.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is applicable to power transmission belts, etc.
The present invention relates to a vulcanization method and vulcanization equipment that can be applied to manufacturing that requires a vulcanization process and for efficiently vulcanizing products to be vulcanized in assembly lines.

0002

[Conventional technology]

The production of the above-mentioned power transmission belts consists of: 1. A process of sequentially wrapping belt materials such as unvulcanized rubber sheets, canvas, and cords (core material) around a mold, and 2. Loading the mold after molding into a vulcanization container. The process of heating and vulcanizing with steam etc. after the vulcanization process, ■ The process of taking out the mold after vulcanization from the vulcanization container and cooling it, ■
It is common practice to cut a slab as a vulcanized product from a mold, and then cut the slab into pieces of a certain width (round slices).

[0003] Also, among the above steps, the vulcanization step takes much longer than the other steps (the vulcanization time usually includes
Conventionally, as shown in FIG. 7, a plurality of vulcanization equipment was provided for one molding machine, cooling machine, and die cutting machine (requiring several times the molding time).

0004

[Problems to be Solved by the Invention] In the conventional vulcanization method described above, the mold after the molding operation must be transported in parallel to the corresponding vulcanization equipment; They also had to be transported from parallel vulcanization equipment to a common cooling machine, and only the vulcanization process had a parallel flow as shown in Figure 7. In particular, when manufacturing a plurality of products in sequence, it is necessary to accurately match the molds to be transported and dedicated vulcanization equipment, which makes the transport work quite complicated. In addition, in order to perform the vulcanization process efficiently, conventional vulcanization processes have been complicated, such as changing the heating temperature between the outside and inside of the mold, or changing the heating temperature between the preheating stage and the main vulcanization stage. Vulcanization is performed in a pattern, but in such a case, it is necessary to perform complicated control for each vulcanization equipment.

[0005] This invention was made in view of the above points, and by dividing the vulcanization process, which takes the longest time in manufacturing power transmission belts, etc., the flow of the vulcanization process is serialized, and it is possible to perform so-called assembly work. The purpose is to provide a vulcanization method and vulcanization equipment to enable production.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the vulcanization method of the present invention includes: a) dividing the vulcanization step into a plurality of steps based on the vulcanization pattern or the molding operation time; b) The unvulcanized molded product is sequentially moved together with the vulcanization container between heating and pressing means for each of the divided steps, and is vulcanized under each of the vulcanization steps.

The vulcanization equipment of the present invention for carrying out the above vulcanization method includes: A) a plurality of heating and pressurizing units corresponding to the number of vulcanization steps divided based on the vulcanization pattern or molding operation time; The means are installed in a series at predetermined intervals, and B) each heating and pressurizing means and the vulcanization container are provided with a pair of pressurized high temperature fluid injection/discharge devices that can be connected and separated from each other. C) A conveying means for sequentially moving the vulcanization containers is provided between each of the heating and pressurizing means.

[0008]

[Operation] According to the vulcanization method and vulcanization equipment of the present invention having the above configuration, for example, when manufacturing a power transmission belt, belt material is molded using a mold, and the belt molded product is charged into a vulcanization container. After that, the vulcanization container is sequentially moved between heating and pressurizing means for each process divided based on the vulcanization pattern or molding operation time, and the belt molded product in the vulcanization container is subjected to multiple vulcanization processes. Vulcanize downward. Therefore, for example, when the vulcanization process is divided based on the molding operation time, the molded products are sequentially carried out at the end of the molding operation and charged into the vulcanization container, and then the vulcanization process is divided according to the molding operation time. The belt molding is vulcanized while being moved intermittently under the curing process. The belt molded product after vulcanization is then taken out from the vulcanization container and cooled. When the belt material is molded on the mold in the molding process, the vulcanized belt molded product is extracted from the mold after cooling. In the vulcanization method of the present invention, the vulcanization process is divided as described above, so that the belt moldings associated with each vulcanization process are connected in series and vulcanized in sequence. Therefore, compared to the conventional parallel vulcanization method, it becomes easier to transport the unvulcanized molded product (also the vulcanized container or the mold), and productivity is improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the vulcanization method of the present invention will be described with reference to the drawings together with an embodiment of the vulcanization apparatus. This example relates to vulcanization equipment used for manufacturing power transmission belts, and this vulcanization equipment (Figure 1) performs vulcanization in four steps based on a vulcanization pattern (Figure 4). . Fig. 1 is a front view schematically showing the vulcanization equipment according to the embodiment of the present invention together with the belt manufacturing process, Fig. 2 is a front view showing the steam injection/discharge device, and Fig. 3 is an overview of the vulcanization can. A cross-sectional view, FIG. 4(a) is a drawing showing two vulcanization patterns from the inside and outside of the mold, and FIG. 4(b) is a drawing showing a division mode of the vulcanization pattern in FIG. 4(a). be.

In the molding process shown in FIG. 1, a belt material 2 such as an unvulcanized rubber sheet, canvas, or core cord is wound around the surface of a mold 1 to form a belt molded product 2. This forming operation is performed using a belt forming machine (not shown) and typically takes about 5 minutes.

After the molding operation is completed, the mold 1 is placed into a vulcanizing can 3 as a vulcanizing container, and then the mold 1 is placed into four heating vulcanizers constituting the vulcanizing equipment 5 for carrying out the next vulcanizing process. Pressure means 5A~
It is placed on a trolley 4 as a transport means and transported up to the first heating and pressurizing means 5A of 5D.

In the heating and pressurizing means 5A, steam (steam pressure P3) is introduced into the vulcanizing can 3 side to preheat the belt molded product 2 on the surface of the mold 1 from the outside for a certain period of time (T1) to bring it into a molten state. do. The vulcanization pattern by the first heating and pressing means 5A is shown in FIG.
(b) corresponds to the vulcanization pattern of (A).

[0013] In the same way as above, the next mold 1 which has been molded in the molding process is loaded into the vulcanizing can 3 and transported by the trolley 4 to the heating and pressing means 5A. At the same time, the first mold 1 preheated by the heating and pressing means 5A is conveyed by the cart 4 to the second heating and pressing means 5B. In this heating and pressurizing means 5B, steam (steam pressure P3) is introduced into the vulcanizing can 3 side, and steam (steam pressure P1) with different pressures is introduced into the mold 1 for a certain period of time (T2-T1). Second heating and pressurizing means 5
The vulcanization pattern of B corresponds to the vulcanization pattern of (B) in FIG. 4(b).

[0014] Hereinafter, as the other molds 1 whose molding operations have been completed in the above-mentioned molding process are loaded into the vulcanizing can 3 and sequentially conveyed by the cart 4 to the first heating and pressing means 5A, , the mold 1 of the heating and pressing means 5A is transferred to the second heating and pressing means 5B,
The mold 1 of the second heating and pressing means 5B is connected to the third heating and pressing means 5C, and the mold 1 of the third heating and pressing means 5C is connected to the fourth heating and pressing means 5D. transported at the same time. Third heating and pressing means 5C and fourth heating and pressing means 5
In D, steam (steam pressure P3) is introduced into the vulcanizing can 3, and steam with different pressures (steam pressure P2) is introduced into the mold 1 for a certain period of time (T3-T2) and (T4-T3), respectively. The vulcanization pattern by the third heating and pressing means 5C is shown in FIG. 4(b).
The vulcanization pattern shown in C) and the vulcanization pattern by the fourth heating and pressing means 5D correspond to the vulcanization pattern shown in FIG. 4B (D), respectively.

As shown in FIG. 3, the vulcanizing can 3 consists of a cylindrical outer mold 3a, and an inflatable and deflated rubber bag 3b is provided on the inner circumferential side of the outer mold 3a. Further, the outer mold 3a is provided with a steam injection hole 3c and a steam discharge hole 3d. Furthermore, the mold 1 also has a steam injection hole 1a and a steam discharge hole 1b.
and is drilled.

Then, the outer mold 3a of the vulcanizing can 3 and the mold 1
The two pairs on the receiving side 6A (left side in the figure) of the steam injection/discharge device 6 shown in FIG. ), and two pairs on the input side 6B (on the right side of the figure) of the injection/discharge device 6 are connected to the heating and pressurizing means 5B to 5D, respectively.

The receiving side 6A of the injection/discharge device 6 is equipped with a nozzle 6a opened on one side at the tip as shown in FIG.
is connected at one end. Among the two pairs of receiving sides 6A, the other ends of the pair of tubes 6c are connected to the injection hole 3c and the discharge hole 3d of the outer mold 3a, and the other ends of the other pair of tubes 6c are connected to the injection hole 1a and the discharge hole of the mold 1. 1b, respectively.

The inlet side 6B of the injection/discharge device 6 is equipped with a nozzle 6e at its tip opposite to the nozzle 6a, and the nozzle 6e has one end of a bellows-type tube 6g that can be expanded and contracted via a manual opening/closing valve 6f. It is connected. The other ends of the pair or two pairs of tubes 6g are heated and pressurized by means 5A to 5.
D steam supply source (not shown) and steam exhaust part (not shown)
are connected to each. The lower end of each nozzle 6g is connected to the tip of the piston rod 7a of the cylinder device 7, one end of which is fixed to the heating and pressurizing means 5A to 5D, and the expansion and contraction of the piston rod 7a causes each nozzle 6g to move toward the receiving side. It is configured to move forward and backward relative to the nozzle 6a to join or separate. Note that ring-shaped packings 6d and 6h are attached to opposing surfaces of the nozzle 6a and the nozzle 6g. In addition, in the vulcanization equipment shown in FIG. 1, a pair of receiving sides 6A of the injection/discharging device 6 on the side of the injection hole 3c and the discharge hole 3d of the vulcanizing can 3 are provided in parallel on the side of the vulcanizing can 3, and the receiving side A pair of input sides 6B of the injection/discharge device 6 corresponding to 6A are provided in parallel to the heating and pressurizing means 5A to 5D. Furthermore, a pair of receiving sides 6A on the injection hole 1a and discharge hole 1b sides of the mold 1 are arranged side by side on the upper surface of the vulcanizing can 3, and a pair of receiving sides 6B of the injection/discharging device 6 corresponding to the receiving sides 6A are arranged side by side on the upper surface of the vulcanizing can 3. , are suspended in parallel from the upper part of the heating and pressurizing means 5B to 5D.

As described above, the mold 1 that has completed the molding operation in the molding process is loaded into the vulcanizing can 3 and transported to the cart 4.
As the metal molds 1 of the heating and pressing means 5A to 5C are sequentially conveyed to the heating and pressing means 5A, the molds 1 of the heating and pressing means 5A to 5C are sequentially conveyed to the heating and pressing means 5B to 5D in successive steps by means of a trolley 4, respectively. To move the mold 1 between the heating and pressurizing means 5A to 5D, the on-off valves 6b and 6f on the receiving side 6A and the receiving side 6B of the injection/discharging device 6 are closed, and the vulcanizing can 3 is moved.
The pressure of the steam introduced into the bag body 3B and the mold 1 is kept constant. In addition, the on-off valve 6
If b and 6f are of an automatic opening/closing type, it is convenient because the operator does not have to open and close them when transporting the mold 1. When the vulcanization work is completed in each of the four divided vulcanization steps, the mold 1 is taken out from the vulcanization can 3. Then, after the mold 1 is cooled to near room temperature with a cooler (not shown), the vulcanized belt molded product 2 is extracted from the mold 1 with a die cutter (not shown). After this, the mold 1 is returned to the molding process. Further, the vulcanizing can 3 from which the mold 1 has been taken out is also returned to the first heating and pressurizing means 5A together with the cart 4.

FIG. 5(a) is a diagram showing two other vulcanization patterns from the inside and outside of the mold, and FIG. 5(b) is a diagram showing how the vulcanization pattern in FIG. 5(a) is divided. It is a drawing. The division mode shown in Figure (b) is that the vulcanization process is divided into five steps (A) to (E) every 5 minutes according to the vulcanization pattern and molding operation time (5 minutes in this case). In accordance with this, five heating and pressurizing means (not shown) are also provided. However, the vulcanization method and equipment are basically the same as in the above embodiments.

FIG. 6(a) is a diagram showing still another two vulcanization patterns on the inside and outside of the mold, and FIG. 6(b) is a diagram showing how the vulcanization pattern in FIG. 6(a) is divided. It is a drawing. The division mode shown in FIG.
3 vulcanization steps (A) to (
C), which has three heating and pressurizing means (not shown).
A stand will be provided. However, in the case of this example, FIG. 6(b)
As shown in the vulcanization pattern in (A), steam (steam pressure P2) is applied to the vulcanizing can 3 side by the first heating and pressurizing means (not shown).
Three minutes after the introduction of steam, steam (steam pressure P
1) needs to be introduced. Other points are basically the same as the first and second embodiments.

[0022]

[Effect of the invention] As is clear from the above explanation,
The vulcanization method and vulcanization equipment of the present invention have the following effects. (1) According to the vulcanization method of the present invention, the vulcanization process, which takes the longest time in manufacturing power transmission belts, is divided based on the vulcanization pattern and molding time, thereby making the vulcanization work flow serial. This allows production to be carried out on an assembly line, greatly improving production efficiency. In addition, compared to the conventional method described above, it is easier to transport molded products, vulcanization containers, etc. between the vulcanization process and other processes. In particular, if the vulcanization process is divided based on the vulcanization pattern, control of the steam pressure and the like in each heating and pressurizing means of the vulcanization equipment can be simplified. (2) According to the vulcanization equipment of the present invention, the vulcanization method of the present invention can be carried out reliably.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing a vulcanization equipment according to an embodiment of the present invention together with a transmission belt manufacturing process.

FIG. 2 is a front view showing a steam injection/discharge device.

FIG. 3 is a sectional view showing an outline of a vulcanization can.

FIG. 4(a) is a drawing showing two vulcanization patterns from the inside and outside of the mold, and FIG. 4(b) is a drawing showing how the vulcanization pattern in FIG. 4(a) is divided. It is.

FIG. 5(a) is a drawing showing two other vulcanization patterns from the inside and outside of the mold, and FIG. 5(b) is the same drawing (a).
) is a drawing showing how the vulcanization pattern is divided.

FIG. 6(a) is a drawing showing two further vulcanization patterns from the inside and outside of the mold, and FIG. 6(b) is a division mode of the vulcanization pattern in FIG. 6(a). FIG.

FIG. 7 is a flow diagram showing a conventional belt manufacturing process.

[Explanation of symbols]

1 Mold 2 Belt molded product 3 Vulcanizing can (vulcanizing container) 4 Trolley 5A to 5D Heating and pressing means 6 Steam injection/discharge device 7 Cylinder device

Claims (2)

[Claims] Claim 1: A series of manufacturing steps in which a molding material for a power transmission belt or the like is molded using a mold, the unvulcanized molded product is charged into a vulcanization container, vulcanized, and the vulcanized molded product is cooled. In the step, the vulcanization step is divided into a plurality of steps based on the vulcanization pattern or the molding operation time, and the unvulcanized molded product is vulcanized between heating and pressing means for each of the divided steps. A method of vulcanizing a power transmission belt, etc., characterized in that the vulcanization is performed after each of the vulcanization steps by sequentially moving the container together with the container. 2. After molding a molding material such as a power transmission belt onto a mold, the mold is placed in a vulcanization container and vulcanized, and the vulcanized molded product is placed in the vulcanization container together with the mold. In vulcanization equipment used in a series of manufacturing processes in which the vulcanized molded product is removed from the mold, cooled, and then removed from the mold, the number of vulcanization processes divided based on the vulcanization pattern or the molding operation time is A plurality of corresponding heating and pressurizing means are installed in series at predetermined intervals, and a pair of pressurized high temperature fluids that can be connected and separated from each other is connected to each heating and pressurizing means and the vulcanization container. A vulcanizing equipment such as a power transmission belt, characterized in that an injection/discharge device is connected to each, and a conveyance means for sequentially moving the vulcanization container is provided between each of the heating and pressurizing means.