Cooling system for injection molding machine

Abstract

The present application relates to the field of injection molding machines, and discloses a cooling system for injection molding machines, including a cooling assembly, the cooling assembly is used to cool a coolant, a refrigeration assembly is arranged on the cooling assembly, a temperature sensing assembly is arranged in the cooling assembly, the temperature sensing assembly is connected in series with the refrigeration assembly, and the temperature of the coolant in the cooling assembly is controlled at a constant temperature; an input pipe assembly, the first end of the input pipe assembly is connected to the output end of the cooling pipe, the second end of the input pipe assembly is connected to the cooling assembly, so that the coolant after the cooling pipe is used is input to the cooling assembly through the input pipe assembly; an output pipe assembly, the first end of the output pipe assembly is connected to the input end of the cooling pipe, the second end of the output pipe assembly is connected to the cooling assembly, so that the coolant after the cooling assembly is cooled is input to the cooling pipe through the output pipe assembly. Provided is a cooling system for injection molding machines that can accurately grasp the cooling temperature of an injection mold.

Description

Technical Field

[0001] The present application relates to the field of injection molding machines, and in particular to a cooling system for injection molding machines. Background Art

[0002] In the field of plastic parts processing and molding, the injection molding machine is a commonly used processing device that injects the plastic fluid in a molten state into the cavity of the injection mold for cooling and molding. The time and quality of product molding are closely related to the temperature of the injection mold. When the injection molding machine has been working continuously for a period of time, the temperature of the injection mold will be very high, and the molding time required for the product will be longer. The operator cannot accurately grasp the mold opening time, and the production efficiency of the product is reduced. Different plastic melts have different requirements for the molding temperature. When the temperature of the injection mold is too low, it will easily leave defects such as bubbles or cracks on the product. Therefore, in the prior art, when the injection mold is cooled by the cooling system of the injection molding machine, there is a technical problem that the cooling temperature of the injection mold cannot be accurately grasped. Utility Model Content

[0003] The present application mainly solves the technical problem that the existing technology cannot accurately control the cooling temperature of the injection mold, and provides a cooling system for an injection molding machine that can accurately control the cooling temperature of the injection mold.

[0004] In order to solve the above technical problems, the present application provides a cooling system for an injection molding machine, which is used for cooling an injection mold. A cooling pipe is formed in the injection mold, and a coolant flows in the cooling pipe. The cooling system for an injection molding machine includes:

[0005] A cooling component, the cooling component is used to cool the coolant, the cooling component is provided with a refrigeration component, the cooling component is provided with a temperature sensing component, the temperature sensing component is connected in series with the refrigeration component to control the temperature of the coolant in the cooling component at a constant temperature;

[0006] An input pipe assembly, wherein a first end of the input pipe assembly is connected to an output end of the cooling pipeline, and a second end of the input pipe assembly is connected to the cooling assembly, so that the coolant after cooling the cooling assembly is input into the cooling pipeline through the input pipe assembly;

[0007] An output pipe assembly, wherein a first end of the output pipe assembly is connected to an input end of the cooling pipe, and a second end of the output pipe assembly is connected to the cooling assembly so as to input the used coolant of the cooling pipe into the cooling assembly through the output pipe assembly.

[0008] In one embodiment, the cooling assembly includes:

[0009] A first cooling box, the first cooling box is made of a heat-conducting material, and the first cooling box is connected to the input pipe assembly;

[0010] The second cooling box is made of heat-insulating material, the first cooling box and the second cooling box are connected in series through an intermediate pipe assembly, and the second cooling box is connected to the output pipe assembly.

[0011] In one embodiment, the cooling assembly further includes:

[0012] An intermediate cooling box, wherein the intermediate cooling box is arranged between the first cooling box and the second cooling box, the intermediate pipeline assembly includes a first intermediate pipe and a second intermediate pipe, the first cooling box is connected to the intermediate cooling box through the first intermediate pipe, and the second cooling box is connected to the intermediate cooling box through the second intermediate pipe, the intermediate cooling box is provided with the refrigeration assembly, the intermediate cooling box is provided with the temperature sensing assembly, and the temperature sensing assembly is connected in series with the refrigeration assembly to control the temperature of the coolant in the intermediate cooling box at a constant temperature.

[0013] In one possible implementation, the intermediate pipe assembly further comprises:

[0014] a first stop valve, the first stop valve being arranged on the first intermediate pipe to block or transmit the coolant between the first cooling box and the intermediate cooling box;

[0015] A second stop valve is provided on the second intermediate pipe to block or transmit the coolant between the intermediate cooling box and the second cooling box.

[0016] In one embodiment, the cooling assembly also includes a heat exchange assembly, the heat exchange assembly includes a heat exchanger, the intermediate pipeline assembly includes a third intermediate pipe, the first end of the third intermediate pipe is connected to the tube-side fluid outlet of the heat exchanger, the second end of the third intermediate pipe is connected to the first cooling box, and the second end of the input pipe assembly is connected to the tube-side fluid inlet of the heat exchanger.

[0017] In one embodiment, the heat exchange assembly further includes a heat exchange water tank assembly, which is connected to the shell-side fluid inlet of the heat exchanger via a first connecting pipe and is connected to the shell-side fluid outlet of the heat exchanger via a second connecting pipe.

[0018] In one embodiment, the heat exchange water tank assembly includes a first heat exchange box and a second heat exchange box, the first heat exchange box is connected in series with the second heat exchange box through an intermediate connecting pipe, the first heat exchange box is connected to the second connecting pipe, the second heat exchange box is connected to the first connecting pipe, and the first heat exchange box and the second heat exchange box are both made of heat conductive material.

[0019] In one embodiment, the water exchange tank assembly further includes:

[0020] a third stop valve, the third stop valve being arranged on the intermediate connecting pipe to block or transmit the coolant between the first heat exchange box and the second heat exchange box;

[0021] A fourth stop valve is arranged on the first connecting pipe to block or transmit the coolant between the second heat exchange box and the heat exchanger.

[0022] In one embodiment, a first water pump is provided on the second connecting pipe to pump the coolant in the heat exchanger into the heat exchange water tank assembly.

[0023] In one possible implementation manner, a second water pump is provided on the output pipe assembly to pump the coolant in the second cooling box into the cooling pipeline.

[0024] Compared with the prior art, the injection mold adopts the method of cooling the injection mold by allowing the coolant to flow rapidly in the cooling pipe to take away the temperature inside the injection mold. The coolant after use in the cooling pipe is input to the cooling assembly through the output pipe assembly. A refrigeration assembly is provided on the cooling assembly, and a temperature sensing assembly is provided in the cooling assembly. The temperature sensing assembly monitors the coolant temperature in the cooling assembly and transmits the monitoring result to the refrigeration assembly. The refrigeration assembly cools the coolant in the cooling assembly in real time according to the temperature monitored by the temperature sensing assembly to ensure that the coolant temperature input into the cooling pipe through the input pipe assembly is constant.

[0025] Therefore, the present application has the characteristics of reasonable structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a structural schematic diagram of a cooling system for an injection molding machine of the present application.

[0027] Description of the numbers in the figure:

[0028] 100. Injection mold;

[0029] 110. Cooling pipe;

[0030] 200, cooling assembly;

[0031] 210, first cooling box; 220, second cooling box; 230, intermediate cooling box; 231, refrigeration assembly; 232, temperature sensing assembly; 240, heat exchange assembly; 241, heat exchanger; 241-1, tube-side fluid outlet; 241-2, tube-side fluid inlet; 241-3, shell-side fluid inlet; 241-4, shell-side fluid outlet; 242, heat exchange water tank assembly; 242-1, first heat exchange box; 242-2, second heat exchange box; 243, first connecting pipe; 244, second connecting pipe; 245, intermediate connecting pipe; 246, third stop valve; 247, fourth stop valve; 250, first water pump; 260, second water pump;

[0032] 300, input tube assembly;

[0033] 400, output pipe assembly;

[0034] 500, intermediate pipe assembly;

[0035] 510, first intermediate pipe; 520, second intermediate pipe; 530, first stop valve; 540, second stop valve; 550, third intermediate pipe. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] The technical problem existing in the prior art is that the cooling temperature of the injection mold cannot be accurately controlled.

[0038] To this end, the present application provides a cooling system for an injection molding machine, which is used to cool an injection mold, wherein a cooling channel is formed in the injection mold, and a coolant flows in the cooling channel, wherein the cooling system for the injection molding machine includes:

[0039] A cooling component, the cooling component is used to cool the coolant, the cooling component is provided with a refrigeration component, the cooling component is provided with a temperature sensing component, the temperature sensing component is connected in series with the refrigeration component to control the temperature of the coolant in the cooling component at a constant temperature;

[0040] An input pipe assembly, wherein a first end of the input pipe assembly is connected to an output end of the cooling pipe, and a second end of the input pipe assembly is connected to the cooling assembly, so that the used coolant of the cooling pipe is input to the cooling assembly through the input pipe assembly;

[0041] An output pipe assembly, wherein a first end of the output pipe assembly is connected to an input end of the cooling pipe, and a second end of the output pipe assembly is connected to the cooling assembly so as to input the coolant after cooling the cooling assembly into the cooling pipe through the output pipe assembly.

[0042] Embodiment 1:

[0043] Attached Figure 1 This is a schematic diagram of the structure of the cooling system for the injection molding machine in this application. Figure 1 As shown, the cooling system for an injection molding machine of the present application is used to cool an injection mold 100, and the injection mold 100 includes a fixed mold and a movable mold, and cooling pipes 110 are formed in the fixed mold and the movable mold. Cooling liquid flows in the cooling pipe 110, and the cooling liquid takes away the heat in the fixed mold and the movable mold by flowing rapidly. The temperature of the cooling liquid before flowing into the cooling pipe 110 is lower than the temperature of the cooling liquid after flowing out of the cooling pipe 110.

[0044] Please refer to the attached Figure 1 As shown, the cooling system for the injection molding machine of the present application includes a cooling component 200, and the cooling component 200 is used to cool the coolant. The cooling component 200 includes a first cooling box 210, and the first cooling box 210 is used to store the coolant after the cooling pipe 110 is used. The first cooling box 210 is made of a heat-conducting material. Furthermore, the first cooling box 210 cools the coolant by natural cooling to reduce the energy consumption of the cooling component 200. In the present application, the amount of coolant used and the volume of the first cooling box 210 can be increased to increase the time that the first cooling box 210 can be naturally cooled. When the amount of coolant used is increased, the amount of coolant remaining in the first cooling box 210 can be increased and the circulation cycle of the coolant increases, thereby increasing the time that the first cooling box 210 can be naturally cooled.

[0045] In one embodiment, the thermally conductive material is thermally conductive insulating elastic rubber.

[0046] In one embodiment, the heat conduction method of the first cooling box 210 further includes providing cooling holes on the top of the first cooling box 210 .

[0047] The cooling assembly 200 also includes a second cooling box 220, which is used to store the cooled coolant and re-input the cooled coolant into the cooling pipe 110. The second cooling box 220 is provided to prevent the cooled coolant from mixing with the used coolant, which results in the temperature of the coolant being uncontrollable. The second cooling box 220 is made of a heat-insulating material to achieve a constant temperature of the coolant in the second cooling box 220, and further achieve a constant temperature of the coolant input into the cooling pipe 110. The first cooling box 210 and the second cooling box 220 are connected in series through the intermediate pipe assembly 500.

[0048] The cooling assembly 200 further includes an intermediate cooling box 230, which is disposed between the first cooling box 210 and the second cooling box 220. The intermediate pipe assembly 500 includes a first intermediate pipe 510 and a second intermediate pipe 520. The first cooling box 210 is connected to the intermediate cooling box 230 via the first intermediate pipe 510, so that the coolant is transferred from the first cooling box 210 to the intermediate cooling box 230. The second cooling box 220 is connected to the intermediate cooling box 230 via the second intermediate pipe 520, so that the coolant is transferred from the intermediate cooling box 230 to the second cooling box 220. The intermediate cooling box 230 is provided with a refrigeration assembly 231, which cools the coolant in the intermediate cooling box 230. Since the cooling speed of natural cooling is slow and the coolant needs to flow back to the cooling pipe 110 at a faster speed, the temperature of the coolant after cooling through the first cooling box 210 is still higher than the required temperature, so the coolant needs to be input into the intermediate cooling box 230 for secondary cooling, and the secondary cooling is cooled by the refrigeration component 231. The intermediate cooling box 230 is provided with a temperature sensing component 232, which monitors the temperature of the coolant in the intermediate cooling box 230 in real time and transmits the monitoring result to the refrigeration component 231. The refrigeration component 231 refrigerates the coolant in the intermediate cooling box 230 according to the temperature monitored by the temperature sensing component 232, and the refrigeration component 231 is provided with a rated temperature. When the real-time temperature monitored by the temperature sensing component 232 is equal to the rated temperature in the refrigeration component 231, it means that the cooling of the coolant in the intermediate cooling box 230 is completed, and then the coolant in the intermediate cooling box 230 can be transported to the second cooling box 220 to ensure that the coolant temperature input into the cooling pipe 110 by the cooling component 200 is constant.

[0049] In the present application, the refrigeration principle of the refrigeration assembly 231 mainly relies on the circulation of the refrigerant, and the temperature inside the intermediate cooling box 230 is reduced by absorbing and discharging heat. The refrigeration assembly 231 includes key components such as a compressor, a condenser, an expansion valve, and an evaporator to form a refrigeration cycle system. The refrigerant undergoes processes such as compression, condensation, expansion, and evaporation in the system, thereby absorbing and releasing heat to achieve a refrigeration effect. Among them, the evaporator is arranged on the periphery of the first cooling box 210.

[0050] In one embodiment, the temperature sensing component 232 is disposed at the center of the middle cooling box, so as to be away from the evaporator, thereby preventing the temperature measured by the temperature sensing component 232 from being affected by the evaporator.

[0051] In one embodiment, the amount of coolant cooled by the intermediate cooling box 230 at one time is the amount of coolant required to cool the cooling pipe 110 once or multiple times.

[0052] In one embodiment, during the circulation of the coolant, the amount of coolant stored in the first cooling box 210 is greater than the amount of coolant stored in the intermediate cooling box 230. The amount of coolant stored in the second cooling box 220 is greater than the amount of coolant used for a single cooling.

[0053] In one embodiment, the intermediate pipe assembly 500 further includes a first stop valve 530 , which is disposed on the first intermediate pipe 510 to block or flow the coolant added to the first cooling box 210 and the intermediate cooling box 230 .

[0054] In one embodiment, the intermediate pipe assembly 500 further includes a second stop valve 540 . The second stop valve 540 is disposed on the second intermediate pipe 520 to block or allow the coolant to flow between the intermediate cooling box 230 and the second cooling box 220 .

[0055] Please refer to the attached Figure 1 As shown, the cooling system for the injection molding machine includes an input pipe assembly 300, a first end of the input pipe assembly 300 is connected to the output end of the cooling pipe 110, and a second end of the input pipe assembly 300 is connected to the cooling assembly 200, and further connected to the heat exchanger 241. If in other embodiments, there is no heat exchanger 241, it is connected to the first cooling box 210, so that the used coolant of the cooling pipe 110 is input to the cooling assembly 200 through the input pipe assembly 300 for further cooling.

[0056] Please refer to the attached Figure 1As shown, the cooling system for the injection molding machine includes an output pipe assembly 400, a first end of the output pipe assembly 400 is connected to the input end of the cooling pipe 110, and a second end of the output pipe assembly 400 is connected to the cooling assembly 200, so that the coolant after cooling the cooling assembly 200 is input to the cooling pipe 110 through the output pipe assembly 400. Further, the output pipe assembly 400 is connected to the second cooling box 220.

[0057] Please refer to the attached Figure 1 As shown, the cooling assembly 200 also includes a heat exchange assembly 240, the heat exchange assembly 240 includes a heat exchanger 241, the intermediate pipe assembly 500 also includes a third intermediate pipe 550, the first end of the third intermediate pipe 550 is connected to the tube-side fluid outlet 241-1 of the heat exchanger 241, the second end of the third intermediate pipe 550 is connected to the first cooling box 210, and the second end of the input pipe assembly 300 is connected to the tube-side fluid inlet 241-2 of the heat exchanger 241. Thus, the used coolant of the cooling pipe 110 is input into the heat exchanger 241 as the tube-side fluid, and heat exchange and cooling are achieved with the shell fluid. The heat exchange assembly 240 cools the coolant, which can further reduce the energy consumption of the cooling assembly 200.

[0058] The heat exchange assembly 240 preferably includes a heat exchange water tank assembly 242, which is connected to the shell-side fluid inlet 241-3 of the heat exchanger 241 through a first connecting pipe 243, and the heat exchange water tank assembly 242 is connected to the shell-side fluid outlet 241-4 of the heat exchanger 241 through a second connecting pipe 244 to output the heat exchange liquid in the heat exchange water tank assembly 242 as a shell fluid to the heat exchanger 241.

[0059] In one embodiment, the heat exchange water tank assembly 242 includes a first heat exchange tank 242-1 and a second heat exchange tank 242-2. The first heat exchange tank 242-1 is connected in series with the second heat exchange tank 242-2 through an intermediate connecting pipe 245. The first heat exchange tank 242-1 is connected to the second connecting pipe 244, and the second heat exchange tank 242-2 is connected to the first connecting pipe 243. The first heat exchange tank 242-1 and the second heat exchange tank 242-2 are made of heat conductive materials. The heat exchange liquid is cooled in the first heat exchange tank 242-1 and then input into the second heat exchange tank 242-2. The second heat exchange tank 242-2 then inputs the cooled heat exchange liquid into the heat exchanger 241 to prevent the cooled heat exchange liquid from mixing with the heat exchange liquid just input from the heat exchanger 241 to the first heat exchange tank 242-1. In the present application, both the first heat exchange box 242-1 and the second heat exchange box 242-2 cool the heat exchange liquid by natural cooling.

[0060] The heat exchange tank assembly 242 further includes a third stop valve 246, which is disposed on the intermediate connecting pipe 245 to block or transmit the cooling liquid between the first heat exchange tank 242-1 and the second heat exchange tank 242-2.

[0061] The heat exchange tank assembly 242 further includes a fourth stop valve 247 , which is disposed on the first connecting pipe 243 to block or transmit the cooling liquid between the second heat exchange tank 242 - 2 and the heat exchanger 241 .

[0062] Please refer to the attached Figure 1 As shown, the cooling system for the injection molding machine of the present application further includes a first water pump 250 and a second water pump 260. The first water pump 250 is arranged on the second connecting pipe 244 to pump the coolant in the heat exchanger 241 into the heat exchange water tank assembly 242. The second water pump 260 is arranged on the output pipe assembly 400 to pump the coolant in the second cooling tank 220 into the cooling pipe 110.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A cooling system for an injection molding machine, used for cooling an injection mold, wherein a cooling channel is formed in the injection mold, and a coolant flows in the cooling channel, characterized in that: The cooling system for the injection molding machine comprises: A cooling component, the cooling component is used to cool the coolant, the cooling component is provided with a refrigeration component, the cooling component is provided with a temperature sensing component, the temperature sensing component is connected in series with the refrigeration component to control the temperature of the coolant in the cooling component at a constant temperature; An input pipe assembly, wherein a first end of the input pipe assembly is connected to an output end of the cooling pipe, and a second end of the input pipe assembly is connected to the cooling assembly, so that the used coolant of the cooling pipe is input to the cooling assembly through the input pipe assembly; An output pipe assembly, wherein a first end of the output pipe assembly is connected to an input end of the cooling pipe, and a second end of the output pipe assembly is connected to the cooling assembly so as to input the coolant after cooling the cooling assembly into the cooling pipe through the output pipe assembly.

2. The cooling system for an injection molding machine according to claim 1, characterized in that: The cooling assembly comprises: A first cooling box, the first cooling box is made of a heat-conducting material, and the first cooling box is connected to the input pipe assembly; The second cooling box is made of heat-insulating material, the first cooling box and the second cooling box are connected in series through an intermediate pipe assembly, and the second cooling box is connected to the output pipe assembly.

3. The cooling system for an injection molding machine according to claim 2, characterized in that: The cooling assembly further comprises: An intermediate cooling box, wherein the intermediate cooling box is arranged between the first cooling box and the second cooling box, the intermediate pipeline assembly includes a first intermediate pipe and a second intermediate pipe, the first cooling box is connected to the intermediate cooling box through the first intermediate pipe, and the second cooling box is connected to the intermediate cooling box through the second intermediate pipe, the intermediate cooling box is provided with the refrigeration assembly, the intermediate cooling box is provided with the temperature sensing assembly, and the temperature sensing assembly is connected in series with the refrigeration assembly to control the temperature of the coolant in the intermediate cooling box at a constant temperature.

4. The cooling system for an injection molding machine according to claim 3, characterized in that: The intermediate pipe assembly also includes: a first stop valve, the first stop valve being arranged on the first intermediate pipe to block or transmit the coolant between the first cooling box and the intermediate cooling box; A second stop valve is provided on the second intermediate pipe to block or transmit the coolant between the intermediate cooling box and the second cooling box.

5. The cooling system for an injection molding machine according to claim 3, characterized in that: The cooling assembly also includes a heat exchange assembly, which includes a heat exchanger. The intermediate pipeline assembly includes a third intermediate pipe, a first end of the third intermediate pipe is connected to the tube-side fluid outlet of the heat exchanger, a second end of the third intermediate pipe is connected to the first cooling box, and a second end of the input pipe assembly is connected to the tube-side fluid inlet of the heat exchanger.

6. The cooling system for an injection molding machine according to claim 5, characterized in that: The heat exchange assembly also includes a heat exchange water tank assembly, which is connected to the shell-side fluid inlet of the heat exchanger through a first connecting pipe, and is connected to the shell-side fluid outlet of the heat exchanger through a second connecting pipe.

7. The cooling system for an injection molding machine according to claim 6, characterized in that: The water exchange tank assembly includes a first heat exchange tank and a second heat exchange tank. The first heat exchange tank is connected in series with the second heat exchange tank through an intermediate connecting pipe. The first heat exchange tank is connected to the second connecting pipe, and the second heat exchange tank is connected to the first connecting pipe. The first heat exchange tank and the second heat exchange tank are both made of heat conductive material.

8. The cooling system for an injection molding machine according to claim 7, characterized in that: The water exchange tank assembly further comprises: a third stop valve, the third stop valve being arranged on the intermediate connecting pipe to block or transmit the coolant between the first heat exchange box and the second heat exchange box; A fourth stop valve is arranged on the first connecting pipe to block or transmit the coolant between the second heat exchange box and the heat exchanger.

9. The cooling system for an injection molding machine according to claim 6, characterized in that: The second connecting pipe is provided with a first water pump to pump the coolant in the heat exchanger into the heat exchange water tank assembly.

10. The cooling system for an injection molding machine according to claim 2, characterized in that: The output pipe assembly is provided with a second water pump to pump the coolant in the second cooling box into the cooling pipeline.

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