Rapid cooling device for vulcanizing mold

Abstract

The rapid cooling device comprises a vacuum cover and a vacuum cover hydraulic cylinder for driving the vacuum cover to move, and the vacuum cover is arranged at the output end of the vacuum cover hydraulic cylinder and is close to and covers the vulcanization mold or far away from the open vulcanization mold along with stretching and retracting of the vacuum cover hydraulic cylinder; the vacuum cover is provided with an injection opening, an extraction opening and a safety ventilation opening, the extraction opening is connected to vacuumizing equipment through an extraction pipeline, the injection opening is connected to a cooling medium supply device through a cooling medium conveying pipeline, and the cooling medium supply device is electrically connected with a temperature control system of the vulcanizing machine. During cooling, the vulcanizing mold is kept on the heating platform without transferring the vulcanizing mold, a cooling medium is input into the closed space, the temperature of the vulcanizing mold is rapidly reduced, meanwhile, the temperature measuring port of the thermocouple is formed in the mold closing surface of the vulcanizing mold, and the temperature of the vulcanizing mold is monitored in real time; and when the temperature is reduced to a set temperature such as 80-120 DEG C, the cooling medium is stopped, and the vacuum cover is opened, so that continuous production is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vulcanization equipment, in particular to a rapid cooling device for a vulcanization mold. Background Art

[0002] During the production and processing of sealing rings, it is necessary to vulcanize rubber materials such as fluororubber or fluoroether rubber. During vulcanization, the rubber material is placed in a vulcanization mold, and the mold is closed, heated, and pressurized to achieve one-time vulcanization. After vulcanization, the vulcanization mold needs to be cooled. The traditional supporting cooling device introduces coolant into the cooling channel in the cooling plate and makes the cooling plate and the vulcanization mold contact each other. However, this cooling method has a slow heat dissipation and a long cooling time, which makes it difficult to meet the efficiency requirements of rapid cooling. In addition, during the traditional cooling operation, the vulcanization mold needs to be transferred from the heating station to the cooling station. The vulcanization mold is heavy and inconvenient to transfer. During the transfer process, the mold temperature is difficult to control, making it difficult to achieve continuous production of sealing ring rubber materials. Utility Model Content

[0003] The utility model aims to provide a vulcanization mold rapid cooling device, which can quickly cool the vulcanization mold without the need for transfer.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A rapid cooling device for a vulcanization mold comprises a vacuum hood and a vacuum hood hydraulic cylinder for driving the vacuum hood to move, wherein the vacuum hood hydraulic cylinder is mounted on a vulcanizer frame, the vacuum hood is mounted on an output end of the vacuum hood hydraulic cylinder and moves closer to or away from the vulcanization mold as the vacuum hood hydraulic cylinder expands and contracts; an injection port, an air extraction port and a safety vent are provided on the vacuum hood, the air extraction port is connected to a vacuum pumping device via an air extraction pipe, the injection port is connected to a cooling medium supply device via a cooling medium delivery pipe, and the cooling medium supply device is electrically connected to a temperature control system of the vulcanizer.

[0006] Preferably, the cooling medium supply device includes a self-pressurized liquid nitrogen tank and a control valve installed on the outlet of the self-pressurized liquid nitrogen tank, one end of the cooling medium delivery pipeline is connected to the control valve and the other end is connected to the injection port; the temperature control system includes a PLC controller and a thermocouple electrically connected to the PLC controller, the control valve is electrically connected to the PLC controller, and the temperature measuring port of the thermocouple is set on the mold surface of the vulcanization mold.

[0007] Preferably, the cooling medium delivery pipeline is a vacuum thermal insulation pipeline.

[0008] Preferably, the vulcanization mold includes an upper heating platform, and a mold-shifting hydraulic cylinder is provided on the top of the upper heating platform for driving the upper heating platform to close or open the mold. The piston rod of the mold-shifting hydraulic cylinder passes through the vacuum cover and a second sealing ring is provided between the vacuum cover and the piston rod of the mold-shifting hydraulic cylinder.

[0009] Preferably, the vacuum cover is driven by a vacuum cover hydraulic cylinder to move up and down, the vulcanization mold further includes a lower heating platform, the bottom end of the vacuum cover is open and the bottom end of the vacuum cover is sealed with the lower heating platform when covering the vulcanization mold.

[0010] Preferably, a first sealing ring is provided at the bottom end of the vacuum cover and is in sealing contact with the lower heating platform.

[0011] Preferably, the vulcanization mold further comprises an upper template installed on the upper heating platform and a lower template installed on the lower heating platform, and a plurality of cooling holes are provided through the upper template and the lower template.

[0012] Preferably, the upper template and the lower template are made of stainless steel.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model discloses a rapid cooling device for a vulcanization mold, comprising a vacuum hood driven to rise and fall by a vacuum hood hydraulic cylinder. The vacuum hood descends and cooperates with the vulcanization mold to form a closed space. During cooling, the vulcanization mold does not need to be moved but is kept on a heating platform. A cooling medium is input into the closed space. Liquid nitrogen is preferably used as the cooling medium. The temperature of the vulcanization mold is rapidly reduced by gasification of the liquid nitrogen. At the same time, a temperature measuring port of a thermocouple is provided on the mold joint surface of the vulcanization mold to monitor the temperature of the vulcanization mold in real time. When the temperature drops to a set temperature, for example, 80°C-120°C, the cooling medium is stopped and the vacuum hood is opened, thereby facilitating continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the rapid cooling device of the utility model.

[0016] Figure 2 This is a schematic diagram of the upper and lower template structures of the utility model.

[0017] Markings in the figure: 10, cooling hole; 11, upper template; 12, lower template; 13, upper heating platform; 14, lower heating platform; 15, mold-shifting hydraulic cylinder; 16, thermocouple; 20, vacuum cover; 21, exhaust port; 22, injection port; 23, safety vent; 24, cooling medium delivery pipeline. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description.

[0019] like Figure 1-Figure 2 As shown, this embodiment provides a rapid curing mold cooling device, comprising a vacuum hood 20 and a vacuum hood hydraulic cylinder (not shown) that drives the vacuum hood 20. The vacuum hood hydraulic cylinder is mounted on the curing machine frame and positioned above the vacuum hood 20. The vacuum hood 20 is mounted on the output end of the vacuum hood hydraulic cylinder and moves closer to or away from the curing mold as the vacuum hood hydraulic cylinder retracts and contracts. After curing is completed, the vacuum hood hydraulic cylinder drives the vacuum hood 20 toward the curing mold until it covers the curing mold. A cooling medium is then introduced to directly act on the curing mold, rapidly cooling the mold. Liquid nitrogen is preferably used as the cooling medium.

[0020] The vulcanization mold of this embodiment includes an upper template 11 and a lower template 12. The upper template 11 is installed on an upper heating platform 13, and the lower template 12 is installed on a lower heating platform 14. The top of the upper heating platform 13 and the bottom of the lower heating platform 14 are respectively provided with a mold-moving hydraulic cylinder 15 for driving the upper heating platform 13 and the lower heating platform 14 to close or open the mold. The upper template 11 and the lower template 12 are both made of stainless steel with a thickness of no more than 30 mm to avoid heat accumulation in the vulcanization mold caused by an overly thick mold, which affects the cooling rate.

[0021] Furthermore, to improve the efficiency of the cooling medium in cooling the vulcanization mold, the upper and lower mold plates 11, 12 are provided with a plurality of cooling holes 10 extending therethrough. These holes 10 allow the cooling medium to pass through during the cooling phase. To accurately reflect the vulcanization mold temperature, in this embodiment, the temperature control system thermocouple 16 has its temperature measurement port located on the mating surfaces of the upper and lower mold plates 11, 12, i.e., the vulcanization mold. Specifically, a mounting groove is provided on the mating surfaces, and the temperature measurement port is located within the mounting groove. Both the upper and lower mold plates 11, 12 are provided with temperature measurement ports.

[0022] In this embodiment, the vacuum hood 20 is provided with an exhaust port 21, and the exhaust port 21 is connected to a vacuum pumping device through an exhaust pipe. The vacuum hood 20 is driven down by the vacuum hood hydraulic cylinder to form a closed space between the vacuum hood 20 and the vulcanization mold. The softened rubber material in the vulcanization mold is vacuumed and exhausted through the exhaust port 21 and the vacuum pumping device before vulcanization, and the vulcanization mold is quickly cooled after vulcanization.

[0023] Since the vacuum hood 20 needs to be raised and lowered and to realize a closed space, the piston rod of the mold-shifting hydraulic cylinder 15 passes through the vacuum hood 20 and a second sealing ring is provided between the vacuum hood 20 and the piston rod of the mold-shifting hydraulic cylinder 15. The bottom end of the vacuum hood 20 is open and the bottom end of the vacuum hood 20 is sealed with the lower heating platform 14 when the vulcanization mold is covered. The bottom end of the vacuum hood 20 is provided with a first sealing ring that is in sealing contact with the lower heating platform 14. Specifically, a second annular groove is provided at the position where the vacuum hood 20 contacts the piston rod of the mold-shifting hydraulic cylinder 15. The second sealing ring is fixedly embedded in the second annular groove. The sealing performance of this location is ensured by the sliding sealing cooperation between the second sealing ring and the piston rod. A first annular groove is provided at the bottom end of the vacuum hood 20. The first sealing ring is fixedly embedded in the first annular groove. The sealing performance of this location is ensured by the sealing cooperation between the first sealing ring and the lower heating platform 14.

[0024] In addition, the vacuum cover 20 is also provided with an injection port 22 and a safety vent 23. The injection port 22 is connected to a cooling medium supply device via a cooling medium delivery pipe 24. The cooling medium supply device is electrically connected to the temperature control system of the vulcanizer. The temperature control system includes a PLC controller and a thermocouple 16 electrically connected to the PLC controller. The temperature of the vulcanizing mold is detected in real time by the thermocouple 16 and fed back to the PLC controller, so that the temperature of the vulcanizing mold can be controlled more accurately. The cooling medium supply device includes a self-pressurized liquid nitrogen tank and a control valve installed at the outlet of the self-pressurized liquid nitrogen tank. The control valve is electrically connected to the PLC controller. One end of the cooling medium delivery pipe 24 is connected to the control valve and the other end is connected to the injection port 22. The cooling medium delivery pipe 24 is a vacuum insulation and heat-insulating pipeline.

[0025] After the vulcanization is completed, the control valve is opened, and the cooling medium liquid nitrogen is delivered into the enclosed space between the vacuum hood 20 and the vulcanization mold via the cooling medium delivery pipe 24 and directly acts on the vulcanization mold. The safety vent 23 is used to promptly remove the vaporized nitrogen to achieve cooling. When the temperature measuring port monitors that the temperature of the vulcanization mold has dropped to the set temperature, the PLC controller controls the control valve to close, stops the input of cooling medium, and then the vacuum hood 20 is driven by the vacuum hood hydraulic cylinder to rise and open the vulcanization mold. The so-called opening of the vulcanization mold does not mean opening the vulcanization mold, but rather that the vulcanization mold is not covered by the vacuum hood 20.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Vulcanization mold rapid cooling device, characterized by: It includes a vacuum hood and a vacuum hood hydraulic cylinder that drives the vacuum hood to move. The vacuum hood hydraulic cylinder is installed on the vulcanizer frame. The vacuum hood is installed at the output end of the vacuum hood hydraulic cylinder and moves closer to or away from the open vulcanization mold as the vacuum hood hydraulic cylinder expands and contracts. The vacuum hood is provided with an injection port, an air extraction port and a safety vent. The air extraction port is connected to the vacuum pumping equipment through an air extraction pipe. The injection port is connected to the cooling medium supply device through a cooling medium delivery pipe. The cooling medium supply device is electrically connected to the temperature control system of the vulcanizer.

2. The vulcanization mold rapid cooling device according to claim 1, characterized in that: The cooling medium supply device includes a self-pressurized liquid nitrogen tank and a control valve installed at the outlet of the self-pressurized liquid nitrogen tank, one end of the cooling medium delivery pipeline is connected to the control valve and the other end is connected to the injection port; the temperature control system includes a PLC controller and a thermocouple electrically connected to the PLC controller, the control valve is electrically connected to the PLC controller, and the temperature measuring port of the thermocouple is set on the mold surface of the vulcanization mold.

3. The vulcanization mold rapid cooling device according to claim 1, characterized in that: The cooling medium delivery pipeline is a vacuum thermal insulation pipeline.

4. The rapid cooling device for a vulcanization mold according to claim 1, characterized in that: The vulcanization mold includes an upper heating platform, and a mold-shifting hydraulic cylinder is provided on the top of the upper heating platform for driving the upper heating platform to close or open the mold. The piston rod of the mold-shifting hydraulic cylinder passes through the vacuum cover and a second sealing ring is provided between the vacuum cover and the piston rod of the mold-shifting hydraulic cylinder.

5. The rapid cooling device for a vulcanization mold according to claim 1, characterized in that: The vacuum cover is driven by a vacuum cover hydraulic cylinder to move up and down. The vulcanization mold also includes a lower heating platform. The bottom end of the vacuum cover is open and is sealed with the lower heating platform when covering the vulcanization mold.

6. The rapid cooling device for a vulcanization mold according to claim 5, characterized in that: The bottom end of the vacuum cover is provided with a first sealing ring which is in sealing contact with the lower heating platform.

7. The rapid cooling device for a vulcanization mold according to claim 1, characterized in that: The vulcanization mold further comprises an upper template installed on the upper heating platform and a lower template installed on the lower heating platform. A plurality of cooling holes are provided through the upper template and the lower template.

8. The rapid cooling device for a vulcanization mold according to claim 7, characterized in that: The upper template and the lower template are made of stainless steel.

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