Thermal oil mold heat compensation device

Abstract

The utility model relates to a kind of heat-conducting oil mould heat compensation device, belong to hot press forming technical field, solve the slow heating speed in low-temperature region heating section in prior art, the temperature of heat preservation section is low, leading to the long time of mould heating and cooling, long process cycle, the problem of poor temperature uniformity of heat preservation section.The utility model includes hot press tank and mould, workpiece can be fixed on the mould, the mould can be connected with the hot press tank, the hot press tank is equipped with hot press tank heat exchange pipeline, the mould is equipped with mould heat exchange pipeline, the mould heat exchange pipeline can be connected with the hot press tank heat exchange pipeline.The mould heat exchange pipeline of the utility model can be connected with hot press tank heat exchange pipeline, heat exchange medium can enter mould heat exchange pipeline by hot press tank heat exchange pipeline, heat transfer directly acts on mould inside, mould heats or cools workpiece, the short time of heating and cooling, short process cycle, temperature uniformity of heat preservation section is good.

Description

Technical Field

[0001] This utility model belongs to the field of hot pressing molding technology, and in particular relates to a thermal compensation device for a heat-conducting oil mold. Background Technology

[0002] An autoclave is a specialized pressure vessel that integrates high temperature, high pressure, and inert gas environments. It is widely used in composite material molding (such as carbon fiber composite components in the aerospace field), material curing, sterilization and disinfection (medical field), and other scenarios. Its core function is to achieve densification, curing, or sterilization of materials by precisely controlling temperature, pressure, and time.

[0003] Currently, in practical applications, autoclaves exhibit a phenomenon where the temperature at the rear of the product is significantly lower than that at the front. This low-temperature region has a slow heating rate in the heating section and a low temperature in the insulation section, resulting in a long heating time, a shortened process cycle, and poor temperature uniformity in the electrical insulation section. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a thermal compensation device for heat transfer oil molds to solve the problems in the prior art where the heating rate in the low-temperature zone is slow, the temperature in the heat preservation zone is low, resulting in long heating and cooling times for the molds, long process cycles, and poor temperature uniformity in the heat preservation zone.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] A thermal compensation device for a heat-conducting oil mold includes an autoclave and a mold. A workpiece can be fixed on the mold, and the mold can be connected to the autoclave. The autoclave is provided with an autoclave heat exchange pipeline, and the mold is provided with a mold heat exchange pipeline. The mold heat exchange pipeline can be connected to the autoclave heat exchange pipeline. The heat exchange medium can enter the mold heat exchange pipeline through the autoclave heat exchange pipeline, and the heat transfer directly acts on the inside of the mold. The mold heats or cools the workpiece.

[0007] Furthermore, the mold heat exchange pipeline includes a mold oil inlet and a mold oil return port, and the autoclave heat exchange pipeline includes an autoclave oil inlet and an autoclave oil return port. The mold oil inlet is connected to the autoclave oil inlet, and the mold oil return port is connected to the autoclave oil return port. The heat exchange medium enters the mold heat exchange pipeline sequentially through the autoclave oil inlet and the mold oil inlet, and then returns through the mold oil return port and the autoclave oil return port, forming a closed loop to ensure continuous and stable heat transfer.

[0008] Furthermore, it also includes a vacuum bag, which can be connected to the mold. The vacuum bag is used to seal the workpiece and the upper part of the mold to form a closed space. By drawing a vacuum, the workpiece is made to stick tightly to the surface of the mold, reducing uneven heating caused by air gaps during the heating process, and further improving the temperature control accuracy and molding quality.

[0009] Furthermore, it also includes a circulating oil circuit, an oil supply device, and a circulating pump. The two ends of the circulating oil circuit are the oil inlet pipe of the autoclave and the oil return pipe of the autoclave, respectively. The oil supply device and the circulating pump are both installed in the circulating oil circuit. The oil supply device is used to store and replenish the heat transfer oil, and the circulating pump is used to drive the heat transfer oil to flow continuously in the closed loop.

[0010] Furthermore, it also includes a filter. The oil supply device is connected to the circulating pump through the filter. The heat exchange medium after passing through the mold flows back to the circulating pump, completing the closure of the entire circulating oil circuit.

[0011] Furthermore, the circulating oil circuit also includes a cold oil supply line, a hot oil supply line, and an expansion guide line.

[0012] Furthermore, the thermal compensation device also includes a heat carrier furnace and an expansion tank. The circulating pump is connected to the heat carrier furnace through the cold oil supply pipeline, and the heat carrier furnace is used to heat the heat exchange medium. The heat carrier furnace is connected to the oil inlet of the oil supply device through the hot oil supply pipeline, and the oil supply device supplies hot oil to the autoclave. The oil outlet of the oil supply device is connected to the expansion oil guide pipeline.

[0013] Furthermore, the circulating oil circuit also includes an overflow pipe, an oil drain pipe, and a sewage discharge pipe.

[0014] Furthermore, the heat compensation device also includes an oil storage tank, and the expansion tank is connected to the oil storage tank through the overflow pipeline, so that excess heat exchange medium can flow into the oil storage tank.

[0015] Furthermore, the heat exchange medium is heat transfer oil.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] (1) The hot pressure tank of the thermal compensation device of this utility model is provided with a hot pressure tank heat exchange pipeline and the mold is provided with a mold heat exchange pipeline. The mold heat exchange pipeline can be connected to the hot pressure tank heat exchange pipeline. The heat exchange medium can enter the mold heat exchange pipeline through the hot pressure tank heat exchange pipeline. The heat transfer is directly applied to the inside of the mold. The mold heats or cools the workpiece. The heating and cooling time is short, the process cycle is short, and the temperature uniformity of the heat preservation section is good.

[0018] (2) The expansion oil guide pipe of this utility model is connected to the expansion tank. When the heat exchange medium is heated, it undergoes thermal expansion. The excess heat exchange medium flows into the expansion tank through the expansion oil guide pipe. When the heat exchange medium is cooled, the temperature decreases and the volume of the heat exchange medium decreases. The heat exchange medium in the expansion tank flows back to replenish the heat exchange medium in the circulating oil circuit. The volume fluctuation of the heat exchange medium caused by temperature change is absorbed by the expansion tank, reducing the pressure abnormality in the circulating oil circuit.

[0019] (3) The vacuum bag of this utility model is used to seal the upper part of the workpiece and the mold to form a closed space. By drawing a vacuum, the workpiece is pressed tightly against the surface of the mold, reducing uneven heating caused by air gaps during the heating process, and further improving the temperature control accuracy and molding quality. Attached Figure Description

[0020] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0021] Figure 1 This is a schematic diagram of the longitudinal section of the autoclave and mold;

[0022] Figure 2 This is a schematic diagram of the overall structure of the thermal compensation device of this utility model.

[0023] Figure label:

[0024] 1-Autoclave; 2-Mold; 3-Mold oil inlet; 4-Mold oil return; 5-Autoclave oil inlet pipeline; 6-Autoclave oil return pipeline; 7-Vacuum bag; 8-Oil supply device; 9-Circulation pump; 10-Filter; 11-Cold oil supply pipeline; 12-Heat carrier furnace; 13-Hot oil supply pipeline; 14-Expansion oil guide pipeline; 15-Expansion tank; 16-Overflow pipeline; 17-Oil storage tank; 18-Oil discharge pipeline; 19-Drainage pipeline; 20-Oil pipeline; 21-Oil injection pump; 100-Workpiece; 200-Oil source. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0026] A specific embodiment of this utility model is as follows: Figure 1As shown, a thermal compensation device for a heat transfer oil mold (hereinafter referred to as the thermal compensation device) is disclosed, including a thermostatic tank 1 and a mold 2. The workpiece 100 is fixed on the mold 2, and the mold 2 can be connected to the thermostatic tank 1. The thermostatic tank 1 is provided with a thermostatic tank heat exchange pipeline, and the mold 2 is provided with a mold heat exchange pipeline. The mold heat exchange pipeline can be connected to the thermostatic tank heat exchange pipeline. The heat exchange medium can enter the mold heat exchange pipeline through the thermostatic tank heat exchange pipeline. The heat transfer is directly applied to the inside of the mold 2. The mold 2 heats or cools the workpiece 100. The heating and cooling time is short, the process cycle is short, and the temperature uniformity of the heat preservation section is good.

[0027] Preferably, the mold heat exchange pipeline includes a mold oil inlet port 3 and a mold oil return port 4, and the autoclave heat exchange pipeline includes an autoclave oil inlet port 5 and an autoclave oil return port 6. The mold oil inlet port 3 is connected to the autoclave oil inlet port 5, and the mold oil return port 4 is connected to the autoclave oil return port 6. The heat exchange medium enters the mold heat exchange pipeline sequentially through the autoclave oil inlet port 5 and the mold oil inlet port 3, and then returns through the mold oil return port 4 and the autoclave oil return port 6, forming a closed loop to ensure continuous and stable heat transfer. There are multiple mold oil inlets 3 and mold oil return ports 4, which are evenly distributed at the same intervals within the mold 2, resulting in good heat distribution uniformity within the mold 2.

[0028] Preferably, the heat compensation device in this embodiment also includes a vacuum bag 7, which can be connected to the mold 2. The vacuum bag 7 is used to seal the workpiece 100 and the upper part of the mold 2 to form a closed space. By drawing a vacuum, the workpiece 100 is made to stick tightly to the surface of the mold 2, reducing uneven heating caused by air gaps during the heating process, and further improving the temperature control accuracy and molding quality.

[0029] Preferably, the heat exchange medium is heat transfer oil.

[0030] Furthermore, such as Figure 2 As shown, the thermal compensation device in this embodiment also includes a circulating oil circuit, an oil supply device 8, and a circulating pump 9. The two ends of the circulating oil circuit are the autoclave inlet pipeline 5 and the autoclave return pipeline 6, respectively. The oil supply device 8 and the circulating pump 9 are both installed in the circulating oil circuit. The oil supply device 8 is used to store and replenish the heat transfer oil, and the circulating pump 9 is used to drive the heat transfer oil to flow continuously in the closed loop.

[0031] Preferably, the heat compensation device in this embodiment further includes a filter 10. The oil supply device 8 is connected to the circulation pump 9 through the filter 10. The heat exchange medium after passing through the mold 2 flows back to the circulation pump 9, completing the closure of the entire circulation oil circuit.

[0032] In some optional embodiments, the circulating oil circuit further includes a cold oil supply line 11, a hot oil supply line 13, and an expansion guide line 14. The thermal compensation device further includes a heat carrier furnace 12 and an expansion tank 15. The circulating pump 9 is connected to the heat carrier furnace 12 via the cold oil supply line 11, and the heat carrier furnace 12 is used to heat the heat exchange medium. The heat carrier furnace 12 is connected to the inlet port of the oil supply device 8 via the hot oil supply line 13. The oil supply device 8 supplies hot oil to the autoclave 1. The outlet line of the oil supply device 8 is connected to the expansion guide line 14, and the expansion guide line 14 is connected to the expansion tank 15. When the heat exchange medium is heated, thermal expansion occurs, and excess heat exchange medium flows into the expansion tank 15 through the expansion guide line 14. When the heat exchange medium is cooled, its temperature decreases, and its volume decreases. The heat exchange medium in the expansion tank 15 flows back, replenishing the circulating oil circuit with heat exchange medium. The volume fluctuation of the oil caused by temperature changes is effectively absorbed by the expansion tank, reducing pressure anomalies in the circulating oil circuit.

[0033] Preferably, the circulating oil circuit also includes an overflow pipe 16, an oil drain pipe 18, and a drain pipe 19. The heat compensation device also includes an oil storage tank 17. The expansion tank 15 is connected to the oil storage tank 17 through the overflow pipe 16. When the heat exchange medium in the circulating oil circuit is severely excessive, the excess heat exchange medium can flow into the oil storage tank 17. The oil storage tank 17 can replenish the heat exchange medium to the system through the oil drain pipe 18, or it can remove the excess heat exchange medium through the drain pipe 19.

[0034] Preferably, the circulating oil circuit also includes an oil injection pipeline 20, and the heat compensation device also includes an oil injection pump 21. The expansion tank 15 is connected to the oil injection pump 21 through the oil injection pipeline 20. When it is necessary to replenish the heat exchange medium, the oil source 200 is connected to the oil injection pump 21, and the oil injection pump 21 is started to inject oil into the expansion tank 15.

[0035] Compared with the prior art, the thermal compensation device of this utility model has a heat exchange pipeline on the autoclave 1 and a mold heat exchange pipeline on the mold 2. The mold heat exchange pipeline can be connected to the heat exchange pipeline of the autoclave, and the heat exchange medium can enter the mold heat exchange pipeline through the autoclave heat exchange pipeline. The heat transfer is directly applied to the inside of the mold 2, and the mold 2 heats or cools the workpiece 100. The heating and cooling time is short, the process cycle is short, and the temperature uniformity of the heat preservation section is good. The expansion oil guide pipeline 14 is connected to the expansion tank 15. When the heat exchange medium is heated, it undergoes thermal expansion, and the excess heat exchange medium flows into the expansion tank 15 through the expansion oil guide pipeline 14. When the heat exchange medium is cooled, the temperature decreases, the volume of the heat exchange medium decreases, and the heat exchange medium in the expansion tank 15 flows back to replenish the heat exchange medium in the circulating oil circuit. The volume fluctuation of the heat exchange medium caused by temperature changes is absorbed by the expansion tank, reducing the pressure abnormality in the circulating oil circuit.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thermal compensation device for a heat-conducting oil mold, characterized in that, It includes a thermostatic tank (1) and a mold (2). The mold (2) can be connected to the thermostatic tank (1). The thermostatic tank (1) is provided with a thermostatic tank heat exchange pipeline. The mold (2) is provided with a mold heat exchange pipeline. The mold heat exchange pipeline can be connected to the thermostatic tank heat exchange pipeline. The heat exchange medium can enter the mold heat exchange pipeline through the thermostatic tank heat exchange pipeline. The heat transfer directly acts on the inside of the mold (2). The mold (2) heats or cools the workpiece (100).

2. The thermal compensation device for a heat-conducting oil mold according to claim 1, characterized in that, The mold heat exchange pipeline includes a mold oil inlet (3) and a mold oil return port (4). The autoclave heat exchange pipeline includes an autoclave oil inlet (5) and an autoclave oil return port (6). The mold oil inlet (3) is connected to the autoclave oil inlet (5), and the mold oil return port (4) is connected to the autoclave oil return port (6). The heat exchange medium enters the mold heat exchange pipeline sequentially through the autoclave oil inlet (5) and the mold oil inlet (3), and then returns through the mold oil return port (4) and the autoclave oil return port (6), forming a closed loop.

3. The thermal compensation device for a heat-conducting oil mold according to claim 1, characterized in that, It also includes a vacuum bag (7) that can be connected to the mold (2). The vacuum bag (7) is used to seal the workpiece (100) and the upper part of the mold (2) to form a closed space. By drawing a vacuum, the workpiece (100) is made to adhere tightly to the surface of the mold (2) to reduce the amount of pressure.

4. The thermal compensation device for a heat-conducting oil mold according to claim 2, characterized in that, It also includes a circulating oil circuit, an oil supply device (8) and a circulating pump (9). The two ends of the circulating oil circuit are the oil inlet pipe (5) of the autoclave and the oil return pipe (6) of the autoclave, respectively. The oil supply device (8) and the circulating pump (9) are both installed in the circulating oil circuit. The oil supply device (8) is used to store and replenish the heat transfer oil, and the circulating pump (9) is used to drive the heat transfer oil to flow continuously in the closed loop.

5. The thermal compensation device for a heat-conducting oil mold according to claim 4, characterized in that, It also includes a filter (10). The oil supply device (8) is connected to the circulating pump (9) through the filter (10). The heat exchange medium after passing through the mold (2) flows back to the circulating pump (9) to complete the closure of the entire circulating oil circuit.

6. The thermal compensation device for a heat-conducting oil mold according to claim 5, characterized in that, The circulating oil circuit also includes a cold oil supply line (11), a hot oil supply line (13), and an expansion oil guide line (14).

7. The thermal compensation device for a heat-conducting oil mold according to claim 6, characterized in that, The thermal compensation device also includes a heat carrier furnace (12) and an expansion tank (15). The circulating pump (9) is connected to the heat carrier furnace (12) through the cold oil supply pipeline (11). The heat carrier furnace (12) is used to heat the heat exchange medium. The heat carrier furnace (12) is connected to the oil inlet of the oil supply device (8) through the hot oil supply pipeline (13). The oil supply device (8) supplies hot oil to the autoclave (1). The oil outlet pipeline of the oil supply device (8) is connected to the expansion oil guide pipeline (14).

8. The thermal compensation device for a heat-conducting oil mold according to claim 7, characterized in that, The circulating oil circuit also includes an overflow pipe (16), an oil drain pipe (18), and a sewage drain pipe (19).

9. The thermal compensation device for a heat-conducting oil mold according to claim 8, characterized in that, The heat compensation device also includes an oil storage tank (17), and the expansion tank (15) is connected to the oil storage tank (17) through the overflow pipe (16), so that excess heat exchange medium can flow into the oil storage tank (17).

10. The thermal compensation device for a heat-conducting oil mold according to claim 1, characterized in that, The heat exchange medium is heat transfer oil.

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