Circulating cooling device for injection molding machine

Abstract

The utility model relates to the technical field of cooling devices for injection molding machines, in particular to a circulating cooling device for an injection molding machine, which comprises an oil tank and further comprises a cooling pump, a motor, a filter, a temperature control valve and a cooler, the input end of the cooling pump is communicated with the oil tank through an oil inlet pipe, and the output end of the cooling pump is communicated with the input end of the filter. The power output end of the motor is in transmission connection with the power input end of the cooling pump, the output end of the filter is communicated with an oil inlet of the temperature control valve, a first oil outlet of the temperature control valve is communicated with the input end of the cooler, and a second oil outlet of the temperature control valve is communicated with one end of the oil return pipe. The oil liquid output by the cooling pump is controlled through the temperature control valve, the trend of the oil liquid is controlled by controlling the temperature control valve according to needs, the oil liquid of the hydraulic system is stabilized within a proper temperature range, meanwhile, impurities in the system are removed in cooperation with the filter, and the service life of each hydraulic element is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine cooling device technical field especially is related to a kind of circulating cooling device for injection molding machine. BACKGROUND

[0002] Injection molding machine is driven to operate by hydraulic system, and a large amount of heat (such as oil pump work, valve group friction, pressure loss, etc.) is generated in the injection molding process of the hydraulic system, if the temperature of hydraulic oil is too high, the hydraulic oil cooling of injection molding machine is an important link to ensure the stable operation of equipment. Therefore, the existing hydraulic oil cooling device of injection molding machine is directly through cooler to control the temperature of oil in oil tank, and the oil temperature is lowered to the required temperature, but the floating range of the temperature control is large, the hydraulic system cannot be maintained at a most suitable temperature, which affects the performance of the hydraulic system. At the same time, the cooling device is frequently started and stopped, which affects the service life of each hydraulic element. In addition, the cooling device does not work all the time, which affects the filtration of hydraulic oil and cannot filter out the impurities in the system to the maximum extent, affecting the performance of the hydraulic system. SUMMARY

[0003] The utility model solves the technical problems: in order to solve the existing injection molding machine's hydraulic oil cooling device is directly through cooler to control the temperature of oil in oil tank, and the oil temperature is lowered to the required temperature, but the floating range of the temperature control is large, the hydraulic system cannot be maintained at a most suitable temperature, which affects the performance of the hydraulic system. At the same time, the cooling device is frequently started and stopped, which affects the service life of each hydraulic element. In addition, the cooling device does not work all the time, which affects the filtration of hydraulic oil and cannot filter out the impurities in the system to the maximum extent, affecting the performance of the hydraulic system. The present application provides a kind of circulating cooling device for injection molding machine.

[0004] The utility model solves the technical problems and adopts the technical scheme: a kind of circulating cooling device for injection molding machine, including oil tank, further including cooling pump, motor, filter, temperature control valve and cooler, the input end of cooling pump is communicated with oil tank by oil inlet pipe, the output end of cooling pump is communicated with the input end of filter, the power output end of motor is drivingly connected with the power input end of cooling pump, the output end of filter is communicated with the oil inlet of temperature control valve, the first oil outlet of temperature control valve is communicated with the input end of cooler, the second oil outlet of temperature control valve is communicated with one end of oil return pipe, the output end of cooler is communicated with one end of oil return pipe, the other end of oil return pipe is communicated with oil tank. Compared with prior art, the oil liquid output by cooling pump is controlled by temperature control valve in the present application, the direction of oil liquid is controlled according to the need to control temperature control valve, the oil liquid of hydraulic system is stably maintained in a suitable temperature range, and the service life of each hydraulic element is improved by cooperating with filter to remove impurities in the system.

[0005] In order to cool the medium by the cooler, preferably some embodiments, the cooler comprises a heat exchanger, one end of the shell side of the heat exchanger is in communication with the input end of the external cooling medium, the other end of the shell side of the heat exchanger is in communication with the output end of the external cooling medium.

[0006] In order to better use the cooling medium, preferably some embodiments, the cooler further comprises a distributor for distributing the cooling medium to the injection molding machine and the heat exchanger, the input end of the distributor is in communication with the input end of the cooling medium, the output end of the distributor is in communication with the outside, one end of the shell side of the heat exchanger is in communication with the input end of the distributor, the other end of the shell side of the heat exchanger is in communication with the output end of the distributor. By distributing the cooling medium to the injection molding machine and the heat exchanger through the distributor, the utilization rate of the cooling medium is improved.

[0007] In order to facilitate the control of the cooling medium, preferably some embodiments, a first two-position two-way reversing valve is arranged between the input end of the distributor and the input end of the cooling medium.

[0008] In order to facilitate the control of the cooling medium, preferably some embodiments, a second two-position two-way reversing valve is arranged between the input end of the distributor and one end of the shell side of the heat exchanger.

[0009] Preferably, some embodiments of the temperature control valve are three-position three-way proportional reversing valves.

[0010] Preferably, some embodiments of the oil tank are provided with a temperature sensor.

[0011] Preferably, some embodiments of the temperature sensor are located near the oil return pipe of the oil tank.

[0012] The beneficial effects of the utility model are: the utility model discloses a circulating cooling device for injection molding machine, when using, the oil liquid output by the cooling pump is controlled through the temperature control valve, the temperature control valve is controlled according to the need to control the oil liquid direction, realize the oil liquid of hydraulic system is stabilized in a suitable temperature range, at the same time, cooperate filter to remove the impurity in the system, improve the service life of each hydraulic component, avoid the existing injection molding machine's hydraulic oil cooling device is directly through the cooler to the oil liquid in the oil tank temperature control, the oil temperature drops to the required temperature, but the floating range of this temperature control is big, can not make the hydraulic system maintain in a most suitable temperature, influence the performance of the hydraulic pressure, at the same time, the cooling device starts and stops frequently, influence the service life of each hydraulic component, furthermore, the cooling device does not work all the time, influence the filtration of hydraulic oil, can not filter out the impurity in the system to the maximum, influence the performance of the hydraulic system. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further illustrated below in connection with the drawings and examples.

[0014] Figure 1 is a structural schematic view of the utility model.

[0015] In the drawing: 1, oil tank, 2, cooling pump, 3, motor, 4, filter, 5, temperature control valve, 6, cooler, 7, oil inlet pipe, 8, distributor, 9, first two-position two-way directional control valve, 10, second two-position two-way directional control valve, 11, temperature sensor, 12, oil return pipe. DETAILED DESCRIPTION

[0016] The utility model makes further detailed description below combining with the embodiment:

[0017] The utility model is not limited to the following specific embodiments, and the person skilled in the art can implement the utility model by using other various specific embodiments according to the content disclosed in the utility model, or any design structure and idea using the utility model, simple change or change, all fall within the protection scope of the utility model. It should be noted that in the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0018] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0019] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] As Figure 1As shown, a kind of circulating cooling device for injection molding machine, including oil tank 1, cooling pump 2, motor 3, filter 4, temperature control valve 5 and cooler 6, the input end of cooling pump 2 is communicated with oil tank 1 by oil inlet pipe 7, the output end of cooling pump 2 is communicated with the input end of filter 4 by pipeline, the power output end of motor 3 is connected with the power input end of cooling pump 2 by coupling transmission, the output end of filter 4 is communicated with the oil inlet of temperature control valve 5, temperature control valve 5 is three-position three-way proportional reversing valve, the first oil outlet of temperature control valve 5 is communicated with the input end of cooler 6, the second oil outlet of temperature control valve 5 is communicated with one end of oil return pipe 12, the output end of cooler 6 is communicated with one end of oil return pipe 12, the other end of oil return pipe 12 is communicated with oil tank 1.

[0021] Cooler 6 includes heat exchanger, one end of the shell side of the heat exchanger is communicated with the input end of external cooling medium, the other end of the shell side of the heat exchanger is communicated with the output end of external cooling medium, cooler 6 further includes distributor 8 for distributing cooling medium to injection molding machine and heat exchanger, the input end of the distributor 8 is communicated with the input end of cooling medium, the output end of the distributor 8 is communicated with outside, one end of the shell side of the heat exchanger is communicated with the input end of distributor 8, the other end of the shell side of the heat exchanger is communicated with the output end of distributor 8, first two-position two-way reversing valve 9 is arranged between the input end of distributor 8 and the input end of cooling medium, second two-position two-way reversing valve 10 is arranged between the input end of distributor 8 and one end of the shell side of heat exchanger.

[0022] Temperature sensor 11 is arranged in oil tank 1, and temperature sensor 11 is located at the position of oil tank 1 close to oil return pipe 12.

[0023] The above-mentioned circulating cooling device for injection molding machine in use, cooling water enters distributor 8 by first two-position two-way reversing valve 9, and distributor 8 sends part of cooling water to injection molding machine cooling, and then another cooling water is distributed to heat exchanger by second two-position two-way reversing valve 10, cooling water is heat-exchanged with oil by heat exchanger, and the cooling water after heat exchange flows back to the output end of distributor 8 and is discharged uniformly.

[0024] When the hydraulic system works, the cooling motor 3 is started and drives the cooling pump 2 to start, hydraulic oil enters from the oil inlet pipe 7 and passes through the cooling pump 2, the filter 4 and the temperature control valve 5 in turn, at this time, the hydraulic oil can be divided into two or one, when it is two, one oil liquid returns to the oil tank 1 through the second oil outlet of the temperature control valve 5 and the oil return pipe 12, and the other oil liquid is input to the cooler 6 for cooling through the first oil outlet of the temperature control valve 5 and then returns to the oil tank 1 through the oil return pipe 12, and the temperature of the hydraulic system is determined by the temperature control valve 5. When the temperature of the hydraulic system is higher than the set value of the temperature control valve 5, the temperature control valve 5 is in the middle position, and the oil liquid passes through the first oil outlet and the second oil outlet respectively, so that part of the hydraulic oil passes through the cooler 6 for oil temperature cooling, the position of the temperature control valve 5 is related to the difference of the system temperature, when the difference is higher than the set value, the temperature control valve 5 is switched to the left position, at this time, all the hydraulic oil passes through the cooler 6, so that the system temperature is rapidly reduced, with the reduction of the temperature, the temperature control valve 5 is in the middle position, at this time, the opening of the temperature control valve 5 is also reduced, only part of the oil passes through the cooler 6, until the system temperature reaches the set value of the temperature control valve 5, the temperature control valve 5 is in the right position, the hydraulic oil directly returns to the oil tank 1 through the second oil outlet, and the temperature sensor 11 is used for monitoring the temperature in the oil tank 1.

[0025] The above ideal embodiment according to the utility model is an inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A circulating cooling device for injection molding machines, comprising an oil tank (1), characterized in that: The cooling pump (2) has an input end communicated with the oil tank (1) through an oil inlet pipe (7), and an output end communicated with an input end of the filter (4). The motor (3) has a power output end drivingly connected with a power input end of the cooling pump (2). The filter (4) has an output end communicated with an oil inlet of the temperature control valve (5). The temperature control valve (5) has a first oil outlet communicated with an input end of the cooler (6), and a second oil outlet communicated with one end of an oil return pipe (12). The cooler (6) has an output end communicated with one end of the oil return pipe (12). The other end of the oil return pipe (12) is communicated with the oil tank (1).

2. The circulating cooling device for an injection molding machine according to claim 1, characterized by: The cooler (6) comprises a heat exchanger, one end of a shell side of the heat exchanger being communicated with an input end of an external cooling medium, and the other end of the shell side of the heat exchanger being communicated with an output end of the external cooling medium.

3. The circulating cooling device for an injection molding machine according to claim 2, characterized by: The cooler (6) further comprises a distributor (8) for distributing the cooling medium to the injection molding machine and the heat exchanger. The input end of the distributor (8) is communicated with the input end of the cooling medium. The output end of the distributor (8) is communicated with the outside. One end of the shell side of the heat exchanger is communicated with the input end of the distributor (8). The other end of the shell side of the heat exchanger is communicated with the output end of the distributor (8).

4. The circulating cooling device for an injection molding machine according to claim 3, characterized by: A first two-position two-way reversing valve (9) is arranged between the input end of the distributor (8) and the input end of the cooling medium.

5. The circulating cooling device for an injection molding machine according to claim 4, characterized by: A second two-position two-way reversing valve (10) is arranged between the input end of the distributor (8) and one end of the shell side of the heat exchanger.

6. The circulating cooling device for an injection molding machine according to claim 1, characterized by: The temperature control valve (5) is a three-position three-way proportional reversing valve.

7. The circulating cooling device for an injection molding machine according to claim 1, characterized by: The oil tank (1) is provided with a temperature sensor (11).

8. The circulating cooling device for an injection molding machine according to claim 7, characterized by: The temperature sensor (11) is located near the oil return pipe (12) of the oil tank (1).

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