JP2012111122A - Vulcanizing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce variations in the quality of vulcanized rubber materials in a vulcanizing apparatus that piles up and vulcanizes a plurality of molds where the injection of the rubber materials are completed.SOLUTION: The vulcanizing apparatus includes a laminated mold 26 that laminates molds 30a-30c each of which has an electric heater inside, and connecting units 40a-40c that are connected for a power supply side electric contact to be pressed on a heater side electric contact provided on surfaces of the molds 30-30c.

Description

  The present invention relates to a vulcanizing apparatus, and more particularly, to a vulcanizing apparatus for stacking a plurality of molds containing a rubber material therein and vulcanizing the rubber material in the mold at a predetermined pressure and a predetermined temperature.

As a method of vulcanizing the rubber material accommodated in the mold, generally, a predetermined temperature is applied for a predetermined time (vulcanization time) while applying a predetermined pressure by a press device for each mold containing the rubber material therein. Only the way to hold is known.
However, in the method of heating and pressurizing for each mold, when the vulcanization time is long, the number of products processed per unit time of the press device is reduced, leading to an increase in manufacturing cost.

  As a solution to this problem, there is known a vulcanization method in which a plurality of molds that have been injected with a rubber material are stacked, and the stacked molds (herein referred to as “laminated molds”) are heated and pressurized. (See Patent Document 1). In this vulcanization method, an upper heating plate and a lower heating plate that heat the laminated molds sandwiched from above and below, and pressurizing each die by pressing the laminated molds in the direction of the upper heating plate via the lower heating plate. If there is a mold that has been newly injected with rubber material using a cylinder mechanism, loosen the pressure, add the mold to the laminated mold, and complete the vulcanization in the laminated mold. If there is a mold, that is, a mold for which a predetermined time has elapsed from the start of heating and pressurization, the plurality of molds are processed by removing the mold.

  However, in the above-described conventional method, since the heat source for maintaining the mold temperature is only two hot plates sandwiching the laminated mold, the heating is interrupted due to the mold insertion operation into the laminated mold, etc. When the mold temperature is lowered, it takes time for the lowered mold temperature to recover to a predetermined temperature. On the other hand, the speed of the vulcanization reaction is closely related to the mold temperature, and during the period when the mold temperature is lowered, that is, the period until the temperature is restored to the predetermined temperature after the heating is interrupted (temperature decrease period), The speed of the vulcanization reaction decreases. For this reason, in the above conventional method, for example, if the mold temperature during vulcanization is increased to shorten the vulcanization time, the ratio of the temperature decrease period to the vulcanization time becomes relatively large, and the rubber material after vulcanization It is not easy to maintain the quality (vulcanized quality) at a certain level.

  Further, in the above conventional method, the temperature of the mold not in contact with the hot platen is lowered according to the distance from the hot platen, so that the temperature varies among the molds, and the number of stacked molds increases. It is not easy to keep the vulcanization quality uniform due to variations in mold temperature.

  As a solution to the problems of the above conventional vulcanization methods, a method of incorporating an electric heater for each die is conceivable, but the position of each die varies depending on the insertion and removal of the die from the laminated die. The wiring to the electric heater built in the mold is likely to be twisted. In particular, when an automatic machine such as a robot arm automatically inserts or removes a die, the movement of the moving part of the automatic machine is likely to cause an accident such as disconnection or short circuit in the electric heater wiring. How to supply is a big issue.

Japanese Patent No. 3583566

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an electric tool for heating a mold in a vulcanizing apparatus that performs vulcanization by stacking a plurality of molds that have been injected with a rubber material. It is to stably supply power to the electric heater without causing disconnection or short circuit in the wiring to the heater.

  In the present invention, both ends or one end of a laminated mold in which a plurality of molds containing rubber materials are stacked are heated to vulcanize the rubber material in the mold at a predetermined pressure and a predetermined temperature. A plurality of molds constituting the laminated mold, an electric heater provided in the mold, and a heater electrically connected to the electric heater and provided on a surface of the mold A vulcanizing device comprising: a side electrical contact; a power supply side electrical contact that contacts the heater side electrical contact to supply power; and a means for pressing the power supply side electrical contact against the heater side electrical contact.

  According to the present invention, in a vulcanizing apparatus that stacks and vulcanizes a plurality of molds that have been injected with a rubber material, the wiring to the electric heater for mold heating does not cause disconnection or short circuit. It is possible to stably supply power to the electric heater.

It is a block diagram which shows the structure of the vulcanizer which concerns on the 1st Embodiment of this invention. It is sectional drawing which follows the II line | wire of the vulcanizer shown in FIG. It is a block diagram which shows the structure of the metal mold | die in the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the metal mold | die of the metal mold | die in the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the connection unit in the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a figure explaining operation | movement of a connection unit in the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the operation | movement procedure of the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the procedure of the initial process in the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the procedure of the injection | emission vulcanization process in the vulcanization apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of a lamination | stacking metal mold | die and its peripheral part seen from the connection unit in the vulcanization apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of a lamination | stacking metal mold | die and its peripheral part seen from the connection unit in the vulcanization apparatus which concerns on the 3rd Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing the configuration of the vulcanizing apparatus according to the first embodiment of the present invention.
The vulcanizing apparatus 10 is an apparatus that performs injection (extrusion) of a rubber material into a mold and vulcanization of the injected rubber material as a series of steps, and includes a pedestal 12, a ceiling board 14, The frame is constituted by vertical frames 161 and 162 that are fixed on the pedestal 12 and support the ceiling plate 14, and the upper heating plate 20 (1) is attached to the ceiling plate 14 via the upper heat insulating material 18 (1). A power source 22 and a pressurizing cylinder mechanism 24 are fixed to the base 12.

  The pressurizing cylinder mechanism 24 is operated by, for example, hydraulic pressure, and includes a piston rod 241, a piston 242, and a cylinder 243. Moreover, the lower heating board 20 (2) is being fixed to the piston rod 241 via the lower heat insulating material 18 (2).

Between the upper heating plate 20 (1) and the lower heating plate 20 (2), a laminated mold 26 in which three molds 30 a to 30 c are stacked is arranged, and the pressurizing cylinder mechanism 24 and the upper heating plate 20. Pressurization and heating of the laminated mold 26 are performed by (1) and the lower heating plate 20 (2).
Further, a pressurizing mechanism that sandwiches the molds 30a and 30b and pressurizes the molds from the side is provided on the front and back surfaces of the molds 30a and 30b arranged at the uppermost part and the middle part of the laminated mold 26. Holders 28a and 28b (described later) are provided (the holder 28b is not shown in FIG. 1 for the back side).

An injection nozzle 50 for injecting a rubber material is attached to the center portion of the ceiling plate 14, the upper heat insulating material 18 (1), and the upper heating plate 20 (1).
The vertical frame 162 is used to measure the temperatures of the electrical connection units 40a to 40b for supplying power to the electric heaters (described later) provided inside the molds 30a to 30c, and the molds 30a to 30c, respectively. Temperature sensors 52a to 52c are attached.

  As the temperature sensors 52 a to 52 c, for example, a non-contact type that measures the temperature by forming an image of an object to be measured with a lens or the like at a hot junction (heat sensitive part) of minute thermocouples (thermopiles) arranged side by side. A temperature sensor can be used. The temperature sensors 52a to 52c are not necessarily provided in the vertical frame 162, and may be provided in the vertical frame 161, for example, as long as the molds 30a to 30c can be expected. Further, in the present embodiment, the non-contact type temperature sensors 52a to 52c are used. However, the temperature sensors 52a to 52c are contact type temperature sensors and have the same configuration as the connection units 40a to 40c described later. For example, the temperature may be measured by pressing the molds 30a to 30c with the pressurizing cylinder mechanism 24 operated by air pressure.

FIG. 2 is a cross-sectional view taken along the line II of the vulcanizing apparatus 10 shown in FIG.
An opening for introducing a rubber material into a cavity (cavity) is provided in the upper surface portion of each of the molds 30 a to 30 c constituting the laminated mold 26, and the top of the laminated mold 26 is provided. A rubber material is injected from the injection nozzle 50 through the opening to the positioned mold 30a. In addition, two upper and lower grooves are provided on the left and right side surfaces (the front and back portions in FIG. 1) of the molds 30a to 30c, respectively.

  The holders 28a and 28b are auxiliary pressurizing means for the laminated mold 26. The arm portions of the holders 28a and 28b are inserted into the upper groove of the mold 30a and the lower groove of the mold 30b, respectively. , Sandwiched in the direction of pressing each other and pressurized. The pressurizing mechanism is arbitrary as long as it can perform the pressurization.

FIG. 3 is a configuration diagram showing the configuration of the mold 30a. The molds 30b and 30c have the same structure as the mold 30a shown in FIG.
The mold 30a includes an upper mold 30 (1) and a lower mold 30 (2) that can be separated from each other, and the upper mold 30 (1) and the lower mold 30 (2) are brought into close contact with each other. In addition, a cavity for rubber molding is formed inside the mold 30a.

  The upper mold 30 (1) is provided with an opening 31 for introducing the rubber material injected from the injection nozzle 50 of the vulcanizing apparatus 10 into the cavity at the center thereof, and on the left and right side portions. Are formed with grooves into which the arms of the holders 28a and 28b enter.

  The lower mold 30 (2) includes a metal main body 32 in which concave portions forming a molding cavity are formed and grooves are formed in the left and right side surfaces, and a plate attached to the front surface of the main body 32. 33. In addition, electric heaters 34a and 34b, which will be described later, are attached to the inside of the main body 32, and electric contacts 35a and 35b for supplying power to the electric heaters 34a and 34b are provided on the plate 33.

  Here, as a raw material of the main body part 32 of the upper mold 30 (1) and the lower mold 30 (2), for example, 4 to 5 times the thermal conductivity and double the carbon steel for molds. An aluminum alloy having a specific heat can be used. As a result, the upper mold 30 (1) and the main body 32 can be used when the heat supply from the upper heating plate 20 (1) and the lower heating plate 20 (2) and the electric heaters 34a and 34b of the vulcanizing device 10 is interrupted. It functions also as a heat storage body, and can reduce the temperature drop of the internal rubber material.

FIG. 4 is a configuration diagram showing the configuration of the lower mold 30 (2). 4A, 4B, and 4C are a plan view, a front view, and a right side view of the lower mold 30 (2), respectively.
As shown in FIG. 4A, through holes 36a and 36b are provided in parallel to each other in the main body 32 of the lower mold 30 (2), and a cylindrical electric heater 34a is provided in the through holes 36a and 36b. , 34b are respectively inserted. The power supply lead wires to the electric heaters 34 a and 34 b are connected in parallel to the electric contacts 35 a and 35 b provided on the plate 33.

  The plate 33 is made of a non-conductor (electrical insulator) such as resin and is fixed to the main body 32 by screws 37a and 37b. Further, as shown in FIG. 4C, the electrical contacts 35a and 35b protrude from the plate 33 by a distance Lh (> 0), and are provided on the connection unit 40a (FIG. 1) of the vulcanizer 10 (described later). ) To be electrically connected.

  FIG. 5 is a configuration diagram showing the configuration of the connection unit 40a. 5A, 5B, and 5C are a plan view, a front view, and a right side view of the connection unit 40a, respectively. The other connection units 40b and 40c have the same configuration as the connection unit 40a shown in FIG.

  As shown in FIG. 5A, the connection unit 40 a includes an air cylinder mechanism 41 including a cylinder 411, a piston 412, and a piston rod 413, a housing portion 42 whose back surface is fixed to the piston rod 413, and a front surface of the housing portion 42. The electric contacts 43a and 43b which are the electric power feeding side electric contacts provided in are provided. Here, the electrical contacts 43a and 43b are electrically connected to the power supply unit 22 (FIG. 1) included in the vulcanizing apparatus 10. The connection unit 40 a is attached by fixing the cylinder 411 to the vertical frame 162.

  The air cylinder mechanism 41 presses the electrical contacts 43a and 43b, which are power supply side electrical contacts, against the electrical contacts 35a and 35b (FIG. 4) of the lower mold 30 (2) which are heater side electrical contacts. Connect electrically. As a result, power is supplied from the power supply unit 22 to the electric heaters 34a and 34b of the mold 30a.

  Guard portions 44a and 44b are provided on the front surface of the housing portion 42 so that the left and right side portions protrude from each other, thereby protecting the electrical contacts 43a and 43b. That is, the protrusion amount La (FIG. 5C) of the guard portions 44a and 44b is set such that La> Ls with respect to the protrusion amount Ls of the electrical contacts 43a and 43b. Accidents in which the electrical contacts 43a and 43b are inadvertently contacted with a mold or the like and short-circuited (short-circuited) are prevented.

  However, the protruding amount La of the guard portions 44a and 44b is the protruding amount of the electric contacts 35a and 35b of the lower mold 30 (2) so that the contact between the electric contacts 43a and 43b and the electric contacts 35a and 35b is not hindered. For Lh (FIG. 4C), the relationship La <Ls + Lh is established. The guard portions 44a and 44b may be provided on both the upper and lower side portions on the front surface of the housing portion 42, or may be provided on both the left and right and upper and lower side portions.

FIG. 6 is a diagram for explaining the operation of the connection unit 40a. The operations of the other connection units 40b and 40c are the same as the operation of the connection unit 40a described below.
In FIG. 1, the laminated mold 26 is placed on the lower heating plate 20 (2), and the laminated mold 26 is placed between the upper heating plate 20 (1) and the lower heating plate 20 (2) by the pressurizing cylinder mechanism 24. When the position of each of the molds 30a to 30c is fixed by pressurizing 26, the connection unit 40a moves the piston 412 of the air cylinder mechanism 41 and extends the piston rod 413 forward as shown in FIG. The electrical contacts 43a and 43b of the housing part 42 are pressed against the electrical contacts 35a and 35b of the lower mold 30 (2), respectively, and these are electrically connected.

  Thereby, even if the distance between the mold 30a and the connection unit 40a changes before and after the removal / insertion work of the mold of the laminated mold 26, the piston 412 of the air cylinder mechanism 41 absorbs the distance fluctuation. The electrical contacts 43a and 43b are securely connected to the electrical contacts 35a and 35b, respectively. Moreover, since the connection units 40a-40c are provided for each of the molds 30a-30c, even if the horizontal positions of the molds 30a-30c are different from each other, the electrical contacts of the molds 30a-30c and the connection unit 40a Each electrical contact of ˜40c is securely connected.

  On the other hand, when the heating is stopped for removing the mold from the laminated mold 26 and the connection between the electrical contacts is released, the connection unit 40a moves the piston rod 413 of the air cylinder mechanism 41 backward, The contact between the electrical contacts 43a and 43b and the electrical contacts 35a and 35b is released.

  In order to prevent sparks (discharge) from occurring between the electrical contacts 43a, 43b and the electrical contacts 35a, 35b and damaging the contacts, turning on / off the electrical heaters 34a, 34b is not necessary. The electrical contacts 43a and 43b are electrically connected to the electrical contacts 35a and 35b by a relay (not shown) or the like provided in the sulfur apparatus 10, respectively.

  Moreover, since the temperature of the mold 30a at the time of vulcanization becomes a high temperature of, for example, about 150 to 200 ° C., the surface of the electrical contacts 35a, 35b, 43a, and 43b exposed to the high temperature is oxidized with low electrical conductivity. A film is formed, which may hinder energization of the electric heaters 34a and 34b. For this reason, in order to prevent the formation of the metal oxide film, the surfaces of the electrical contacts 35a, 35b, 43a, 43b may be plated with gold.

  The vulcanizing apparatus 10 having the above-described configuration is configured so that the power supply side electrical contacts of the connection units 40a to 40c are pressed and connected to the heater side electrical contacts of the molds 30a to 30c, and thereby the electric heaters of the molds 30a to 30c. Electric power is supplied to 34a, 34b and the like. That is, since the molds 30a to 30c do not have a lead wire for supplying power to the electric heaters 34a, 34b, etc., the lead wire is bent, broken or short-circuited when the mold is inserted into the laminated mold 26, etc. Thus, electric power can be stably supplied to the electric heaters 34a, 34b and the like.

  Next, the operation | movement procedure of the vulcanizer 10 is demonstrated according to the flowchart shown in FIG. Note that the insertion and removal of the mold after the operation of the vulcanizing apparatus 10 is performed by an automatic machine such as a robot arm installed in the vicinity of the vulcanizing apparatus 10. In addition, the operation control of each part of the vulcanizing apparatus 10 and the operation instruction to the automatic machine are performed by a control device (not shown) provided in the vulcanizing apparatus 10.

  First, as a preparatory work, the user stacks the molds 30a to 30c that do not contain a rubber material therein on the lower heating plate 20 (2) to form the laminated mold 26 (FIG. 1), the holder 28a, The arms 28b are put in the grooves on both side surfaces of the molds 30a and 30b, and the molds 30a and 30b are sandwiched (FIG. 2).

  When the user completes the preparatory work and turns on the power of the vulcanizer 10 (S101), the vulcanizer 10 first performs a preparation process for injecting the rubber material to all the molds 30a to 30c (S102). Thereafter, a continuous process of continuously injecting and vulcanizing a predetermined number of molds 30a to 30c is performed (S103), and the process ends. It is assumed that the predetermined number is set in advance in a control device (not shown) of the vulcanizer 10.

Next, the procedure of the preparation process in the vulcanizing apparatus 10 will be described with reference to the flowchart shown in FIG.
When the preparatory process is started, the vulcanizing apparatus 10 pressurizes the molds 30a to 30c by the pressurizing cylinder mechanism 24 (S201), operates the connection units 40a to 40c, and feeds electric contacts on the connection units 40a to 40c. Are connected to the heater-side electrical contacts of the molds 30a to 30c by pressing them respectively (S202).

  Subsequently, the vulcanizing apparatus 10 starts heating by the upper heating plate 20 (1) and the lower heating plate 20 (2), and starts energization of the electric heaters of the molds 30a to 30c, so that the mold 30a. ~ 30c is preheated to a predetermined temperature (vulcanization temperature) required for vulcanization (S203). Thereafter, when heating is performed by the electric heaters of the upper heating plate 20 (1), the lower heating plate 20 (2), and the molds 30a to 30c, these heat sources and the temperature sensors 52a to 52c cooperate. The molds 30a to 30c are kept at a predetermined vulcanization temperature. Note that the temperature sensors 52a to 52c always measure the temperatures of the molds 30a to 30c.

  Next, the vulcanizing apparatus 10 injects a rubber material from the injection nozzle 50 into the mold at the top of the laminated mold 26 (mold 30a immediately after power-on) (S204), and the injected mold Measurement of the elapsed time after injection is started (S205).

  Subsequently, the vulcanizing apparatus 10 determines whether or not the injection of the rubber material is completed for the lowermost mold of the laminated mold 26 (S206), and when completed (S206, Yes), That is, when the injection of the rubber material is completed for all the molds 30a to 30c, the preparation process is completed.

  On the other hand, when the injection has not been completed for the lowermost mold of the laminated mold 26 (S206, No), the connection unit is firstly moved in order to move the lowermost mold of the laminated mold 26 to the uppermost part. After releasing the connection of the electrical contacts between 40a to 40c and the molds 30a to 30c, the pressurization by the pressurizing cylinder mechanism 24 is released (S207).

  Next, the vulcanizing apparatus 10 instructs the automatic machine, holds the holders 28a and 28b by the automatic machine, and forms the uppermost and intermediate molds of the laminated mold 26 (the molds 30a and 30b immediately after the power is turned on). ) And the mold located at the bottom of the laminated mold 26 (mold 30c immediately after power-on) is taken out and placed at the top of the laminated mold 26 (S208). In addition, the holders 28a and 28b are replaced with new molds that are the uppermost part and the middle part of the laminated mold 26 by an automatic machine (S209). As a result, the holders 28a and 28b are always in a state of being pressed with the uppermost and intermediate molds of the laminated mold 26 sandwiched therebetween.

  Subsequently, after the pressurization by the pressurizing cylinder mechanism 24 is resumed, the electrical contacts of the connection units 40a to 40c are pressed and connected to the electrical contacts of the molds 30a to 30c (S210), and the process returns to step S204 to perform the process. repeat.

  Next, the procedure of the continuous process in the vulcanizing apparatus 10 will be described using the flowchart shown in FIG. Here, since the injection nozzle 50 for injecting the rubber material is disposed on the ceiling plate 14, the elapsed time after the injection of the rubber material is the longest in the mold at the bottom of the laminated mold 26. For this reason, vulcanization is always completed in order from the lowest mold.

  When the continuous treatment is started, the vulcanizing apparatus 10 is such that the elapsed time after the injection of the rubber material has passed the time required for vulcanization (vulcanization time) for the lowermost mold of the laminated mold 26. (S301), in order to take out the lowermost mold, first, the connection of the electrical contacts between the connection units 40a to 40c and the molds 30a to 30c is released, and then pressurization by the pressurizing cylinder mechanism 24 is performed. Release (S302).

  Next, the vulcanizing apparatus 10 instructs the automatic machine to hold the holders 28a and 28b by the automatic machine to support the uppermost and intermediate molds of the laminated mold 26, and from the laminated mold 26 to the lowermost part. The mold is removed (S303), and a new mold that does not contain a rubber material therein (or a mold that is removed from the laminated mold 26 and the rubber after vulcanization is removed) is the uppermost part of the laminated mold 26. (S304). Subsequently, the holders 28a and 28b are replaced with molds that are newly the uppermost part and the middle part of the laminated mold 26 (S305).

Next, after restarting the pressurization by the pressurizing cylinder mechanism 24, the vulcanizing apparatus 10 presses and connects the electrical contacts of the connection units 40a to 40c to the electrical contacts of the molds 30a to 30c (S306). Subsequently, it is determined whether or not a predetermined number of vulcanizations have been completed (S307), and when completed (S307, Yes), the injection vulcanization process is completed.
On the other hand, when the predetermined number of vulcanizations has not been completed (S307, No), it is determined whether or not the injection of the predetermined number of rubber materials has been completed (S308), and when it has been completed (S308). , Yes), the process returns to step S301 and is repeated.

  On the other hand, when the predetermined number of injections are not completed (S308, No), the rubber material is injected into the uppermost mold of the laminated mold 26 (S309), and the post-injection process for the mold is performed. After time measurement is started (S310), the process returns to step S301 and is repeated.

  In the present embodiment, the laminated mold 26 is configured by the three molds 30a to 30c. However, the present invention is not limited to this, and the number of molds constituting the laminated mold 26 is four or more. Also good. In this case, the holders 28a and 28b may be configured to sandwich a mold other than the mold disposed at the lowermost part of the laminated mold 26. Further, in the present embodiment, the auxiliary pressurization is performed by the pair of holders 28a and 28b, but the auxiliary pressurization may be performed by using two or more pairs of holders.

Next, a vulcanizing apparatus according to a second embodiment of the present invention will be described.
In this embodiment, instead of the molds 30a to 30c in the vulcanizing apparatus 10 according to the first embodiment, each mold includes a molding unit that does not have an electric heater and a heating unit for heating the molding unit. And each heater is provided with an electric heater and a heater-side electric contact.

  According to this embodiment, even when the mold is small and an electric heater cannot be attached, the molding part is heated by the heating part adjacent to each molding part, and the rubber material accommodated therein is vulcanized. be able to.

The vulcanizing apparatus according to this embodiment is different only in the configuration of the laminated mold 26 and the molds 30a to 30c constituting the same in the vulcanizing apparatus 10 according to the first embodiment.
FIG. 10 is a configuration diagram showing the configuration of the laminated mold 26 ′ of the vulcanizing apparatus according to the present embodiment and its peripheral portion as viewed from the connection units 40 a to 40 c.
The laminated mold 26 ′ is composed of molds 30′a to 30′c, and the molds 30′a to 30′c are respectively a molding unit 60a and a heating unit 62a, and a molding unit 60b and a heating unit 62b. , And a molding part 60c and a heating part 62c. Moreover, the groove | channel is provided in the both-sides surface part of the shaping | molding parts 60a-60c and the heating parts 62a-62c.

  The holders 28a and 28b put an arm into the groove portion of the molding portion 60a and the groove portion of the heating portion 62b, and pressurize the molds 30'a and 30'b to press each other.

  The structure of the heating parts 62a to 62c is the structure of the lower mold 30 (2) of the mold 30a in the vulcanizing apparatus 10 according to the first embodiment (FIG. 4) except that there is no concave portion constituting the molding cavity. ). That is, each of the heating parts 62a to 62c has an electric heater therein, and a heater-side electrical contact is provided at a position corresponding to the front part of FIG.

  In addition, the molding parts 60a-60c and the heating parts 62a-62c are 4-5 times compared with the carbon steel for metal mold | dies similarly to the metal mold | dies 30a-30c of the vulcanizer 10 which concerns on 1st Embodiment. An aluminum alloy having a thermal conductivity and twice the specific heat can be used. Thereby, when the power supply to the electric heater is interrupted, each of the molding parts 60a to 60c and the heating parts 62a to 62c also functions as a heat storage body, and the temperature reduction of the molding parts 60a to 60c is alleviated and vulcanized. The decrease in reaction rate can be alleviated.

  The operation procedure of the vulcanizing apparatus according to the present embodiment is the same as the procedure shown in the flowcharts of FIGS. 7 to 9, the point that the laminated mold 26 becomes the laminated mold 26 ′, and the molds 30 a to 30 c. Is different from the molds 30'a to 30'c.

Next, a vulcanizing apparatus according to a third embodiment of the present invention will be described.
In the present embodiment, a heat storage unit is further added to the molds 30'a to 30'c in the vulcanizing apparatus according to the second embodiment, and each mold is configured so that the molding unit is sandwiched between the heating unit and the heat storage unit. Shall be.

  According to the present embodiment, when energization to the heating unit is interrupted, the heat stored in the heat storage unit is conducted to the molding unit, thereby further reducing the temperature drop of the molding unit and the vulcanization reaction. The decrease in speed can be further alleviated.

The vulcanizing apparatus according to the present embodiment is different in the part of the laminated mold 26 ′ in the vulcanizing apparatus according to the second embodiment.
FIG. 11 is a configuration diagram showing the configuration of the laminated mold 26 ″ and the peripheral portion of the vulcanizing apparatus according to this embodiment, as viewed from the connection units 40a to 40c.

  The laminated mold 26 '' is composed of molds 30''a to 30''c, and the molds 30''a to 30''c are respectively molded parts 60a to 60c and molded parts 60a. It consists of the heating parts 62a-62c and the heat storage parts 64a-64c arrange | positioned so that -60c may be pinched | interposed, respectively. Moreover, the groove | channel similar to the shaping | molding parts 60a-60c and the heating parts 62a-62c is provided also in the side part of the thermal storage parts 64a-64c.

  The heat storage parts 64a to 64c are aluminum alloys having a thermal conductivity 4 to 5 times and a specific heat 2 times that of carbon steel for molds, like the molding parts 60a to 60c and the heating parts 62a to 62c. By using this, it is possible to enhance the heat storage effect, relieve the temperature drop of the molding parts 60a-60c when heating is interrupted, and relieve the decrease in the vulcanization reaction rate.

  The operation procedure of the vulcanizing apparatus according to the present embodiment is the same as the procedure shown in the flowcharts of FIGS. 7 to 9, the point that the laminated mold 26 becomes the laminated mold 26 ″, and the molds 30 a to 30 a. The difference is that 30c becomes the mold 30 "a to 30" c.

  As described above, according to the first to third embodiments, when a plurality of molds containing a rubber material are stacked inside and vulcanizing the rubber material, the electric heater for heating the mold is used. The power supply to the electric heater can be stably performed without causing disconnection or short circuit in the wiring.

  DESCRIPTION OF SYMBOLS 10 ... Vulcanization device, 12 ... Base, 14 ... Ceiling board, 161, 162 ... Vertical frame, 18 (1) ... Upper heat insulating material, 18 (2) ... Lower side Insulating material, 20 (1) ... upper heating plate, 20 (2) ... lower heating plate, 22 ... power supply, 24 ... cylinder mechanism for pressurization, 241, 411 ... piston rod, 242, 412 ... piston, 243, 413 ... cylinder, 26, 26 ', 26 "... laminated mold, 28a, 28b ... holder, 30a, 30'a, 30''a, 30b, 30′b, 30 ″ b, 30c, 30′c, 30 ″ c... Mold, 30 (1)... Upper mold, 30 (2). ... Opening, 32 ... Main body, 33 ... Plate, 34a, 34b ... Electric heater, 35a, 35b, 43a, 43b ... Air contact, 36a, 36b ... through hole, 37a, 37b ... screw, 40a, 40b, 40c ... connection unit, 41 ... air cylinder mechanism, 42 ... casing, 44a, 44b ... Guard part, 50 ... Injection nozzle, 52a, 52b, 52c ... Temperature sensor, 60a, 60b, 60c ... Molding part, 62a, 62b, 62c ... Heating part, 64a, 64b, 64c ... thermal storage part.

Claims (9)

A vulcanizing apparatus that heats both ends or one end of a laminated mold in which a plurality of molds containing rubber materials are stacked inside and vulcanizes the rubber material in the mold at a predetermined pressure and a predetermined temperature. And
A plurality of molds constituting the laminated mold;
An electric heater provided in the mold;
A heater-side electrical contact electrically connected to the electric heater and provided on the surface of the mold;
A power supply side electrical contact that contacts the heater side electrical contact and supplies power;
Means for pressing the power supply side electrical contact against the heater side electrical contact;
Vulcanizing equipment equipped with. In the vulcanizing apparatus according to claim 1,
A pressurizing means for pressurizing the entire laminated mold;
A vulcanizing apparatus having auxiliary pressurizing means attached to two or more molds arranged adjacent to each other in the laminated mold and assisting the pressurization to the mold. In the vulcanizing apparatus according to claim 1 or 2,
The said pressing means is a vulcanizer which is a cylinder mechanism mechanically connected with the said electric power feeding side electrical contact. In the vulcanizing device according to any one of claims 1 to 3,
The mold is a vulcanizing device made of an aluminum alloy. In the vulcanizing device according to any one of claims 1 to 3,
The mold includes a molding part that is configured separately and has a cavity that accommodates a rubber material therein, and a heating part that includes the electric heater and heats the molding part,
The heater-side electrical contact is a vulcanizing device provided on the surface of the heating portion of the mold. In the vulcanizing apparatus according to claim 5,
The mold further includes a heat storage unit disposed on the opposite side of the heating unit across the molding unit. The vulcanizing apparatus according to claim 6, wherein
The molding part, the heating part, and the heat storage part constituting the mold are vulcanizers made of an aluminum alloy. The vulcanizing device according to any one of claims 1 to 7,
A temperature sensor for measuring the temperature of each mold, and
A vulcanizer having means for pressing the temperature sensors against the molds. In the vulcanizing device according to claim 8,
The means for pressing each temperature sensor is a vulcanizing device that is a cylinder mechanism mechanically connected to the temperature sensor.

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