Cold and hot dual-purpose press vulcanizer

Abstract

The utility model relates to a cold and hot dual-purpose press vulcanizer. The existing flat vulcanizing machine has the problems that the heating and cooling switching cannot be carried out, the temperature cannot be uniformly controlled, and the energy consumption and the equipment cost are high. The device comprises a plurality of oil heaters, a refrigerating machine, an upper hot plate and a lower hot plate, the oil heater, the refrigerating machine, the upper hot plate and the lower hot plate are connected through pipelines and valves to form a heat conduction oil cooling system and a plurality of heat conduction oil heating systems. The plurality of oil heaters independently heat the upper hot plate and the lower hot plate respectively, and the refrigerating machine cools the upper hot plate and the lower hot plate together. The two oil heaters are arranged to independently heat the upper hot plate and the lower hot plate respectively, the refrigerating machine cools the upper hot plate and the lower hot plate together, heating and cooling switching and uniform temperature control can be carried out, and the energy consumption and the equipment cost are low.

Description

Technical Field

[0001] This utility model relates to the technical field of flat vulcanizing machines, specifically to a flat vulcanizing machine that can be used for both hot and cold applications. Background Technology

[0002] Traditional flat vulcanizing machines typically only perform heating or cooling operations during the vulcanization process, which is insufficient to meet the production needs of products requiring high-precision vulcanization processes and rapid cooling under pressure after heating and vulcanization. Furthermore, existing heating and cooling methods are often complex, energy-intensive, and costly, resulting in low production efficiency and inconsistent product quality. For example, some vulcanizing machines use electric heating and water cooling. Electric heating is slow and energy-intensive, while water cooling is prone to corrosion and uneven cooling. Additionally, when cooling water enters the hot plate, it vaporizes directly at high temperatures, causing rapid gas expansion and posing significant safety hazards.

[0003] Therefore, there is an urgent need for a flat vulcanizing machine that can perform efficient heating and cooling switching, uniform temperature control, and save energy, reduce consumption, and lower costs. Summary of the Invention

[0004] The purpose of this invention is to provide a hot and cold dual-purpose flat vulcanizing machine to at least solve the problems of current flat vulcanizing machines being unable to switch between heating and cooling, unable to uniformly control temperature, and having high energy consumption and equipment costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A dual-purpose hot and cold flat vulcanizing machine includes multiple oil heaters, a refrigeration unit, an upper heating plate, and a lower heating plate;

[0007] The oil heater, the refrigerator, the upper heating plate, and the lower heating plate are connected by pipes and valves to form a heat transfer oil cooling system and multiple heat transfer oil heating systems;

[0008] The multiple oil heaters independently heat the upper heating plate and the lower heating plate, while the refrigerator cools both the upper heating plate and the lower heating plate together.

[0009] Furthermore, the pipeline includes multiple oil inlet pipes, multiple oil return pipes, and several connecting pipes. The oil inlet pipes and the oil return pipes are respectively disposed on both sides of the upper heating plate and the lower heating plate through the connecting pipes, and the oil inlet pipes and the oil return pipes are respectively connected to the oil heater and the refrigeration unit through the connecting pipes.

[0010] Furthermore, the valve includes multiple sets of heating control valves and multiple sets of cooling control valves, both of which are mounted on the connecting pipe.

[0011] Furthermore, the heating control valve includes a first valve, a second valve, and a third valve. The first valve and the second valve are both connected to the oil heater, and the third valve is connected to the refrigeration unit, enabling the refrigeration unit to perform bypass internal circulation.

[0012] Furthermore, the cooling control valve includes a fourth valve, a fifth valve, and a sixth valve. The fifth valve and the sixth valve are both connected to the refrigeration unit, and the fourth valve is connected to the oil heater, enabling the oil heater to perform bypass internal circulation.

[0013] Furthermore, both the upper heating plate and the lower heating plate are provided with multiple oil inlets and multiple oil return ports.

[0014] Furthermore, both the upper heating plate and the lower heating plate are provided with serpentine channels inside.

[0015] Furthermore, the serpentine channel includes two symmetrically arranged S-shaped structures, each of which is connected to the oil inlet pipe and the oil return pipe through the oil inlet port and the oil return port, respectively.

[0016] Furthermore, the opening and closing of the valve are both controlled by a PLC.

[0017] Furthermore, the valve opening time in the return oil pipeline lags behind the valve opening time in the inlet oil pipeline.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model provides a dual-purpose hot and cold flat vulcanizing machine. By setting two oil heaters to independently heat the upper and lower heating plates, and a refrigeration unit to cool the upper and lower heating plates together, the temperature distribution of the upper and lower heating plates is more uniform, avoiding product quality problems caused by uneven temperature and greatly improving product quality. Furthermore, by using heat transfer oil for heating and cooling in the same channel, combined with reasonable pipeline and valve control, rapid hot and cold switching can be achieved, greatly shortening the vulcanization cycle and improving production efficiency.

[0020] 2. This utility model, through its bypass internal circulation design, allows the oil in the oil heater and refrigeration unit to circulate internally when heating or cooling is not required, thereby reducing energy waste and lowering the energy consumption of the equipment.

[0021] 3. This utility model has a simple structure, reduces complex heating and cooling devices, lowers the manufacturing cost of the equipment, and also reduces the maintenance cost of the equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the working circuit of this utility model;

[0024] Figure 2 This is a cross-sectional view of the upper heating plate in this utility model;

[0025] The diagram is labeled as follows:

[0026] 1-Oil heater, 2-Refrigeration unit, 3-Upper heating plate, 4-Lower heating plate, 5-Oil inlet pipe, 6-Oil return pipe, 7-Connecting pipe, 8-First valve, 9-Second valve, 10-Third valve, 11-Fourth valve, 12-Fifth valve, 13-Sixth valve, 14-Oil inlet, 15-Oil return port, 16-First shut-off valve, 17-Second shut-off valve. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, in the description of this utility model, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0031] Example:

[0032] This embodiment provides a hot and cold flat vulcanizing machine, including two oil heaters 1, a refrigeration unit 2, an upper heating plate 3 and a lower heating plate 4, and both heating and cooling are achieved using heat transfer oil.

[0033] Specifically, the oil heater 1, the chiller 2, the upper heating plate 3, and the lower heating plate 4 are connected by pipes and valves to form a heat transfer oil cooling system and two heat transfer oil heating systems. The two oil heaters 1 independently heat the upper heating plate 3 and the lower heating plate 4, which facilitates precise control of the heating temperature of the upper heating plate 3 and the lower heating plate 4 according to actual production needs, ensuring uniform heating of the mold. The chiller 2 cools the upper heating plate 3 and the lower heating plate 4 together. During the cooling process, the cold oil generated by the chiller 2 is transported to the channels of the upper heating plate 3 and the lower heating plate 4 through pipes, thereby achieving efficient cooling of the mold.

[0034] In order to achieve precise switching and circulation control of hot oil and cold oil, this embodiment is equipped with pipes and valves. The pipe layout connecting the oil heater 1, the chiller 2, the upper heating plate 3 and the lower heating plate 4 is reasonable to ensure that the heat transfer oil can flow smoothly.

[0035] The pipeline includes two oil inlet pipes 5, two oil return pipes 6, and several connecting pipes 7. The oil inlet pipes 5 and the oil return pipes 6 are respectively set on both sides of the upper heating plate 3 and the lower heating plate 4 through the connecting pipes 7, and the oil inlet pipes 5 and the oil return pipes 6 are respectively connected to the oil heater 1 and the refrigeration unit 2 through the connecting pipes 7.

[0036] The valves include two sets of heating control valves and two sets of cooling control valves, both of which are installed on the connecting pipe 7.

[0037] Specifically, the heating control valves include a first valve 8, a second valve 9, and a third valve 10. The first valve 8 and the second valve 9 are both connected to the oil heater 1, and the third valve 10 is connected to the refrigeration unit 2, enabling the refrigeration unit 2 to perform bypass internal circulation.

[0038] The cooling control valves include a fourth valve 11, a fifth valve 12, and a sixth valve 13. The fifth valve 12 and the sixth valve 13 are both connected to the refrigeration unit 2, and the fourth valve 11 is connected to the oil heater 1, enabling the oil heater 1 to perform bypass internal circulation.

[0039] When the upper heating plate 3 and the lower heating plate 4 are in the heating state, the fourth valve 11, the fifth valve 12 and the sixth valve 13 are closed, and the first valve 8, the second valve 9 and the third valve 10 are opened. The hot oil in the two oil heaters 1 is transported to the interior of the upper heating plate 3 and the lower heating plate 4 through the pipeline. At this time, the cold oil in the refrigeration unit 2 maintains its original temperature and circulates internally, without entering the upper heating plate 3 and the lower heating plate 4.

[0040] When the upper heating plate 3 and the lower heating plate 4 are in a cooling state, the fourth valve 11, the fifth valve 12 and the sixth valve 13 are opened, and the first valve 8, the second valve 9 and the third valve 10 are closed. The cold oil enters the interior of the upper heating plate 3 and the lower heating plate 4 after being cooled by the refrigeration unit 2. At this time, the hot oil in the two oil heaters 1 maintains its original temperature and circulates internally, without entering the upper heating plate 3 and the lower heating plate 4.

[0041] In this embodiment, the opening and closing of the valves are controlled by a PLC, and the opening and closing of the valves are controlled by a control signal. The oil heater 1 is equipped with two first shut-off valves 16, and the refrigeration unit 2 is equipped with two second shut-off valves 17.

[0042] Considering the oil level balance position during the hot-cold switching process, the valve opening time in the return oil pipe 6 lags behind the valve opening time in the inlet oil pipe 5 during the hot-cold switching process, with a lag time of 60s.

[0043] During the heating stage, the valves connecting oil heater 1 to upper heating plate 3 and lower heating plate 4 are opened, and the valves connecting refrigeration unit 2 to upper heating plate 3 and lower heating plate 4 are closed, allowing hot oil to flow to upper heating plate 3 and lower heating plate 4, while cold oil circulates internally within refrigeration unit 2. During the cooling stage, the valves connecting refrigeration unit 2 to upper heating plate 3 and lower heating plate 4 are opened, and the valves connecting oil heater 1 to upper heating plate 3 and lower heating plate 4 are closed, allowing cold oil to flow to upper heating plate 3 and lower heating plate 4, while hot oil circulates internally within oil heater 1.

[0044] In this embodiment, the upper heating plate 3 and the lower heating plate 4 have the same structure and the size is 1500mm*1500mm.

[0045] Both the upper heating plate 3 and the lower heating plate 4 are provided with two oil inlets 14 and two oil return ports 15, so that the temperature of the upper heating plate 3 and the lower heating plate 4 is more uniform and the temperature control is more accurate. In other embodiments, for larger equipment, the number of oil inlets 14 and oil return ports 15 can be appropriately increased according to the conditions to ensure that the surface temperature of the upper heating plate 3 and the lower heating plate 4 better meets the process production requirements.

[0046] In this embodiment, both the upper heating plate 3 and the lower heating plate 4 are provided with serpentine channels. The serpentine channels include two symmetrically arranged S-shaped structures. Each S-shaped structure is connected to the oil inlet pipe 5 and the oil return pipe 6 through the oil inlet and oil return ports, respectively.

[0047] In this embodiment, hot oil and cold oil circulate in the same channel of the upper hot plate 3 and the lower hot plate 4. During heating, the cold oil in the refrigeration unit 2 bypasses the internal circulation and does not participate in the heating process of the upper hot plate 3 and the lower hot plate 4. At this time, the hot oil is heated to the set temperature by the oil heater 1 and then enters the vulcanizing hot plate to provide heat to the mold and promote the vulcanization reaction. During cooling, the hot oil in the oil heater 1 bypasses the internal circulation and no longer supplies heat to the upper hot plate 3 and the lower hot plate 4. The cold oil is cooled to the required temperature by the refrigeration unit 2 and then enters the upper hot plate 3 and the lower hot plate 4 to cool the mold, so that the vulcanized product can be formed quickly.

[0048] In this embodiment, the other valves in the oil heater 1 and the chiller 2 that are not explicitly identified are all in the normally open state during equipment operation, and are all manually opened and closed.

[0049] The usage process in this embodiment is as follows:

[0050] 1. Equipment installation and commissioning

[0051] First, install two oil heaters 1, a chiller 2, an upper heating plate 3, a lower heating plate 4, and related pipes and valves according to the design requirements, ensuring that the pipe connections are tight and there are no leaks. After installation, debug the entire system, check the operation of each component, test whether the valves open and close flexibly, and whether the heat transfer oil circulation is smooth.

[0052] 2. Heating operation

[0053] When the mold needs to be heated for vulcanization, the two oil heaters 1 are started to heat the heat transfer oil to the set vulcanization temperature. At this time, the cold oil in the refrigeration unit 2 is bypassed and internally circulated by controlling the valve, while the hot oil enters the channels of the upper heating plate 3 and the lower heating plate 4 through the pipe. The hot oil flows in the channels of the upper heating plate 3 and the lower heating plate 4, transferring heat to the mold and promoting the vulcanization reaction. During the heating process, the temperature of the upper heating plate 3 and the lower heating plate 4 is monitored in real time, and the heating power of the oil heater 1 is adjusted according to the actual situation to ensure that the temperature of the upper heating plate 3 and the lower heating plate 4 is stable within the set range.

[0054] 3. Cooling operation

[0055] After vulcanization, the mold needs to be cooled. At this time, the oil heater 1 is turned off to stop the heating of the hot oil. The hot oil in the oil heater 1 is bypassed and circulated internally by controlling the valve. At the same time, the refrigeration unit 2 is started to cool the heat transfer oil to the set cooling temperature. The cooled oil enters the channel of the upper heating plate 3 and the lower heating plate 4 through the pipeline to cool the mold. During the cooling process, the temperature of the upper heating plate 3 and the lower heating plate 4 is monitored in real time to ensure that the cooling effect reaches the expected level.

[0056] 4. Maintenance and upkeep

[0057] Regularly maintain and service the equipment, check the quality and level of the heat transfer oil, replace aged or deteriorated heat transfer oil in a timely manner, check for leaks or damage in the pipes and valves, and repair or replace them in time if there are any problems. Perform routine maintenance on oil heater 1 and chiller 2 to ensure their normal operation and extend the service life of the equipment.

[0058] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A dual-purpose (hot and cold) flat vulcanizing machine, characterized in that: It includes multiple oil heaters (1), a refrigerator (2), an upper heating plate (3) and a lower heating plate (4); The oil heater (1), the refrigerator (2), the upper heating plate (3) and the lower heating plate (4) are connected by pipes and valves to form a heat transfer oil cooling system and multiple heat transfer oil heating systems; Multiple oil heaters (1) independently heat the upper heating plate (3) and the lower heating plate (4), while the refrigerator (2) cools the upper heating plate (3) and the lower heating plate (4) together.

2. The dual-purpose hot and cold flat vulcanizing machine according to claim 1, characterized in that: The pipeline includes multiple oil inlet pipes (5), multiple oil return pipes (6), and several connecting pipes (7). The oil inlet pipes (5) and the oil return pipes (6) are respectively located on both sides of the upper heating plate (3) and the lower heating plate (4) through the connecting pipes (7). The oil inlet pipes (5) and the oil return pipes (6) are respectively connected to the oil heater (1) and the refrigerator (2) through the connecting pipes (7).

3. The dual-purpose hot and cold flat vulcanizing machine according to claim 2, characterized in that: The valve includes multiple sets of heating control valves and multiple sets of cooling control valves, both of which are mounted on the connecting pipe (7).

4. A hot and cold dual-purpose flat vulcanizing machine according to claim 3, characterized in that: The heating control valve includes a first valve (8), a second valve (9) and a third valve (10). The first valve (8) and the second valve (9) are both connected to the oil heater (1), and the third valve (10) is connected to the refrigerator (2) so that the refrigerator (2) can perform bypass internal circulation.

5. A hot and cold dual-purpose flat vulcanizing machine according to claim 3, characterized in that: The cooling control valves include a fourth valve (11), a fifth valve (12), and a sixth valve (13). The fifth valve (12) and the sixth valve (13) are both connected to the refrigerator (2). The fourth valve (11) is connected to the oil heater (1) so that the oil heater (1) can perform bypass internal circulation.

6. A dual-purpose (hot and cold) flat vulcanizing machine according to claim 2, characterized in that: Both the upper heating plate (3) and the lower heating plate (4) are provided with multiple oil inlets (14) and multiple oil return ports (15).

7. A hot and cold dual-purpose flat vulcanizing machine according to claim 6, characterized in that: Both the upper heating plate (3) and the lower heating plate (4) are provided with serpentine channels inside.

8. A hot and cold dual-purpose flat vulcanizing machine according to claim 7, characterized in that: The serpentine channel includes two symmetrically arranged S-shaped structures. Each part of the S-shaped structure is connected to the oil inlet pipe (5) and the oil return pipe (6) through the oil inlet (14) and the oil return port (15).

9. A dual-purpose (hot and cold) flat vulcanizing machine according to claim 1, characterized in that: The opening and closing of the valves are both controlled by a PLC.

10. A hot and cold dual-purpose flat vulcanizing machine according to claim 2, characterized in that: The valve opening time in the return oil pipe (6) is later than the valve opening time in the inlet oil pipe (5).

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