A temperature detection control structure and temperature detection control method for an injection molding machine

Abstract

The present invention provides a temperature detection control structure and a temperature detection control method for an injection molding machine, so that the injection molding machine can work under a suitable temperature state, reduce the waste of water resources, and protect the pipeline. A No. 1 throttle valve is installed on the mold water inlet pipe, a No. 2 throttle valve is installed on the plasticizing system water inlet pipe, and a No. 4 throttle valve is installed on the electric control cabinet water inlet pipe; one end of the front oil tank water inlet pipe is connected to the oil tank, and the other end is connected to the B port of the two-position four-way electromagnetic reversing valve, one end of the rear oil tank water inlet pipe is connected to the T port of the two-position four-way electromagnetic reversing valve, and the other end is connected to the water inlet main pipe; a No. 3 throttle valve is installed on the rear oil tank water inlet pipe; one end of the front plasticizing system water outlet pipe is connected to the plasticizing system, and the other end is connected to the A port of the two-position four-way electromagnetic reversing valve, one end of the rear plasticizing system water outlet pipe is connected to the P port of the two-position four-way electromagnetic reversing valve, and the other end is connected to the water outlet main pipe; the mold, plasticizing system, oil tank, and electric control cabinet are all equipped with temperature sensors.

Description

Technical Field

[0001] The invention relates to a temperature detection control structure and a temperature detection control method for an injection molding machine, which are used for temperature detection and control of a mold, a plasticizing system, an oil tank and an electric control cabinet of an injection molding machine. Background Art

[0002] In injection molding production, the temperatures that generally need to be controlled include the temperature of the plasticized parts, the temperature of the oil, the temperature of the mold, the temperature of the electric box, and so on.

[0003] Since different oil temperatures will cause changes in oil viscosity, the applicable temperature is 20 to 50 degrees. The ambient temperature of the injection molding machine often varies with the region and season. The highest ambient temperature may be above 40 degrees or below 0 degrees. Therefore, in order to make the injection molding machine work more reliably and stably, the oil temperature needs to be controlled within the applicable range. When the oil temperature is high, cooling water can be used to cool the oil, but when the oil temperature is below 20 degrees, certain methods need to be taken to increase the oil temperature.

[0004] As for the plasticized parts, the temperature should not be too high at the feeding part, so that the plastic melts early, resulting in low feeding efficiency. At the same time, in order to better ensure product quality, the melting process of the plastic needs to be accurately controlled. Therefore, the plastic temperature in the barrel is kept consistent with the set temperature, so that the plastic temperature can reach a relatively stable value and can be adjusted and responded quickly as needed. Due to the characteristics of pre-molding of the injection molding machine, the conventional mechanism often has a heating effect on the inside of the barrel due to screw shearing and external heating, which causes the plastic temperature to rise. In addition, the temperature requirements for the production of products made of different plastics are also inconsistent. Therefore, the temperature control requirements are relatively high. In the industry, there is only a cooling effect, but it is not effectively controlled.

[0005] In addition, for hydraulic oil, if the temperature is too low, the viscosity of the oil is high, the fluidity is poor, the resistance is large, and the working efficiency is low. If the oil temperature is lower than 20 degrees, sharp turns are easy to damage hydraulic motors, valves, pipes, etc. At the same time, if the system oil temperature is too high, the viscosity of the hydraulic oil will decrease, which is easy to cause leakage, reduced efficiency, reduced strength of the lubricating oil film, accelerated mechanical wear, generated carbides and sludge, oil oxidation accelerated oil quality deterioration, oil seals, and high-pressure hoses will prematurely deteriorate. This greatly affects the stability and reliability of the injection molding machine. Due to its superior molding characteristics, the injection molding machine is used in different occasions and regions in all walks of life. Therefore, in order to increase the application occasions of the injection molding machine, it is necessary to require that the oil temperature can be maintained in a normal temperature range. However, in the industry, the temperature control of each system of the injection molding machine is often cooled, and it is impossible to self-sufficiently heat the oil temperature. Moreover, in different temperature working environments, the requirements for oil cooling are also different. The existing technology does not form a temperature regulation function, and the cooling water flow is often constant, which is wasteful and does not form a reliable and green oil cooling system.

[0006] In addition, since the working temperature of electrical control components is limited, but electrical control components are often installed in a relatively closed electrical control cabinet, due to the continuous operation of electrical components, poor heat dissipation will cause the temperature of the electrical control cabinet to rise sharply, thus causing component failure. An air conditioner is often installed in the industry, but the cost is high.

[0007] In addition, the temperature control of the mold directly affects the quality and production efficiency of the product. During the plastic injection process and the cooling process, the temperature of the mold runner needs to be treated differently. However, at present, in actual production, there is often no distinction. The cooling water flow rate is constant, which requires a higher pressure for injection, thereby increasing energy consumption and wasting water resources.

[0008] In summary, the most common method to control the temperature of plasticizing parts, oil temperature, mold temperature and electrical box temperature of injection molding machines is to pass water and adjust them. However, water is passed separately for each link that needs cooling, and the water valve is simply in a normally closed or normally open state. The temperature control effect is often not monitored, resulting in ineffective management of water temperature control and poor temperature regulation effect. At the same time, it causes a huge waste of water resources. In addition, some water channels are closed for a long time, causing corrosion of water pipes and leading to pipeline failures. Summary of the invention

[0009] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a temperature detection control structure and a temperature detection control method for an injection molding machine with a reasonable structural design, so that the injection molding machine can operate under a suitable temperature state, reduce the waste of water resources, and protect the pipeline.

[0010] The technical solution adopted by the present invention to solve the above problems is: an injection molding machine temperature detection control structure, including a mold, a plasticizing system, an oil tank, an electric control cabinet, a mold water inlet pipe, a plasticizing system water inlet pipe, an oil tank water inlet pipe, an electric control cabinet water inlet pipe, a mold water outlet pipe, a plasticizing system water outlet pipe, an oil tank water outlet pipe and an electric control cabinet water outlet pipe; the mold water inlet pipe and the mold water outlet pipe are both connected to the mold, the plasticizing system water inlet pipe and the plasticizing system water outlet pipe are both connected to the plasticizing system, the oil tank The water inlet pipe and the oil tank outlet pipe are both connected to the oil tank, and the electric control cabinet water inlet pipe and the electric control cabinet outlet pipe are both connected to the electric control cabinet; it is characterized in that: it also includes a No. 1 throttle valve, a No. 2 throttle valve, a two-position four-way electromagnetic reversing valve, a No. 3 throttle valve, a No. 4 throttle valve, a water inlet main pipe and a water outlet main pipe; the water inlet main pipe is connected to the mold water inlet pipe, the plasticizing system water inlet pipe, the oil tank water inlet pipe, and the electric control cabinet water inlet pipe; the water outlet main pipe is connected to the mold water outlet pipe, the plasticizing system water outlet pipe, the oil tank water outlet pipe, The water outlet pipe of the electric control cabinet is connected; the No. 1 throttle valve is installed on the water inlet pipe of the mold, the No. 2 throttle valve is installed on the water inlet pipe of the plasticizing system, and the No. 4 throttle valve is installed on the water inlet pipe of the electric control cabinet; the oil tank water inlet pipe includes a front oil tank water inlet pipe and a rear oil tank water inlet pipe, one end of the front oil tank water inlet pipe is connected to the oil tank, and the other end is connected to the B port of the two-position four-way electromagnetic reversing valve, and one end of the rear oil tank water inlet pipe is connected to the T port of the two-position four-way electromagnetic reversing valve, and the other end is connected to the water inlet main pipe ; The No. 3 throttle valve is installed on the water inlet pipe of the rear oil tank; the water outlet pipe of the plasticizing system includes a front plasticizing system water outlet pipe and a rear plasticizing system water outlet pipe, one end of the front plasticizing system water outlet pipe is connected to the plasticizing system, and the other end is connected to the A port of the two-position four-way electromagnetic reversing valve, and one end of the rear plasticizing system water outlet pipe is connected to the P port of the two-position four-way electromagnetic reversing valve, and the other end is connected to the water outlet main pipe; temperature sensors are installed on the mold, plasticizing system, oil tank, and electric control cabinet.

[0011] The water inlet pipe of the electric control cabinet of the present invention is arranged on the back of the electric cabinet.

[0012] The water inlet pipe of the electric control cabinet of the present invention is flat, and the wider part is attached to the back of the electric cabinet.

[0013] The water inlet pipe of the electric control cabinet described in the present invention is serpentine.

[0014] A temperature detection and control method for an injection molding machine is implemented by using the temperature detection and control structure for the injection molding machine, and comprises the following steps:

[0015] (1) The temperature detection and control steps of the plasticizing system and the oil tank are as follows:

[0016] When the equipment is started, the plasticizing system needs to be heated first, and then the oil pump motor of the oil tank is started; under normal conditions, the oil temperature of the oil tank does not need to be heated or cooled, the No. 2 throttle valve and the No. 3 throttle valve are closed, the P port and the A port, the T port and the B port of the two-position four-way electromagnetic reversing valve are connected, and the plasticizing system is heated according to the requirements of plastic melting; when the plasticizing temperature of the plasticizing system reaches the requirements, the temperature sensor of the plasticizing system sends a signal, opens the No. 2 throttle valve, and adjusts the No. 2 throttle valve, adjusts the flow of cooling water, so that the plasticizing system maintains a stable plasticizing temperature, and at the same time, when the screw is shearing and plasticizing, the plasticizing temperature is also detected by the temperature sensor, and the No. 2 throttle valve is adjusted, and the flow of cooling water is adjusted to ensure the plasticizing temperature of the plasticizing system, thereby ensuring the stability of the molten plastic;

[0017] The oil pump motor is turned on, the oil pump works, the hydraulic oil is in working state, and the oil temperature in the oil tank will rise. When the oil temperature reaches a certain temperature, the temperature sensor of the oil tank feeds back a signal, the No. 3 throttle valve is opened to cool the oil temperature, and as the temperature changes, the No. 3 throttle valve is adjusted to adjust the cooling water flow rate; when the oil temperature is lower than a certain temperature, the oil needs to be heated up, the No. 2 throttle valve is opened, the No. 3 throttle valve is closed, the A port and the B port of the two-position four-way electromagnetic reversing valve are connected, the P port and the T port are closed, the front plasticizing system outlet pipe and the front oil tank inlet pipe are connected, and the heated cooling water set in the plasticizing system flows to the oil tank to raise the oil temperature to the working requirements; when the plasticizing temperature of the plasticizing system and the oil temperature of the oil tank meet the requirements, the temperature sensor of the oil tank sends a signal, the oil pump motor is turned on, the oil pump works, and at the same time, according to the continuous operation of the equipment, the oil temperature will rise, the P port and the A port of the two-position four-way electromagnetic reversing valve are connected, and the T port and the B port are connected, so that the cooling state returns to normal.

[0018] (2) The temperature detection and control steps of the mold are as follows: during the production process of the product, the mold temperature is detected and fed back through the mold temperature sensor, and the flow rate of the mold cooling water is adjusted by adjusting the No. 1 throttle valve to control the temperature change speed of the mold;

[0019] (3) The temperature detection and control steps of the electric control cabinet are as follows: perform temperature detection according to the temperature sensor on the electric control cabinet, provide feedback when the temperature is too high, control the No. 4 throttle valve to open the water inlet channel for cooling, and adjust the No. 4 throttle valve to adjust the flow of cooling water according to the temperature, thereby controlling the temperature change speed of the electric control cabinet.

[0020] Compared with the prior art, the present invention has the following advantages and effects: the present invention enables the injection molding machine to operate under a suitable temperature state, especially enables the injection molding equipment to operate under a low temperature state, reduces the waste of water resources, can accurately control the temperature, has a better effect, and protects the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic structural diagram of an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the local structure of an embodiment of the present invention under normal conditions.

[0023] Figure 3 It is a schematic diagram of the local structure of an embodiment of the present invention under low temperature conditions.

[0024] Figure 4 It is a structural schematic diagram of the back side of the electric control cabinet according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0026] See also Figure 1-Figure 4 The temperature detection control structure of the injection molding machine of the embodiment of the present invention comprises a mold 1, a plasticizing system 2, an oil tank 3, an electric control cabinet 4, a No. 1 throttle valve V1, a No. 2 throttle valve V2, a two-position four-way electromagnetic reversing valve V3, a No. 3 throttle valve V4, a No. 4 throttle valve V5, a water inlet main pipe 5, a water outlet main pipe 6, a mold water inlet pipe 7, a plasticizing system water inlet pipe 8, an oil tank water inlet pipe 9, an electric control cabinet water inlet pipe 10, a mold water outlet pipe 11, a plasticizing system water outlet pipe 12, an oil tank water outlet pipe 13 and an electric control cabinet water outlet pipe 14.

[0027] The mold water inlet pipe 7 and the mold water outlet pipe 11 are both connected to the mold 1, the plasticizing system water inlet pipe 8 and the plasticizing system water outlet pipe 12 are both connected to the plasticizing system 2, the oil tank water inlet pipe 9 and the oil tank water outlet pipe 13 are both connected to the oil tank 3, and the electric control cabinet water inlet pipe 10 and the electric control cabinet water outlet pipe 14 are both connected to the electric control cabinet 4.

[0028] The water inlet main pipe 5 is connected to the mold water inlet pipe 7, the plasticizing system water inlet pipe 8, the oil tank water inlet pipe 9, and the electric control cabinet water inlet pipe 10. The water outlet main pipe 6 is connected to the mold water outlet pipe 11, the plasticizing system water outlet pipe 12, the oil tank water outlet pipe 13, and the electric control cabinet water outlet pipe 14.

[0029] The No. 1 throttle valve V1 is installed on the mold water inlet pipe 7. The No. 2 throttle valve V2 is installed on the plasticizing system water inlet pipe 8. The No. 4 throttle valve V5 is installed on the electric control cabinet water inlet pipe 10.

[0030] The fuel tank water inlet pipe 9 includes a front fuel tank water inlet pipe 91 and a rear fuel tank water inlet pipe 92. One end of the front fuel tank water inlet pipe 91 is connected to the fuel tank 3, and the other end is connected to the B port of the two-position four-way electromagnetic reversing valve V3. One end of the rear fuel tank water inlet pipe 92 is connected to the T port of the two-position four-way electromagnetic reversing valve V3, and the other end is connected to the water inlet main pipe 5. The third throttle valve V4 is installed on the rear fuel tank water inlet pipe 92.

[0031] The plasticizing system water outlet pipe 12 includes a front plasticizing system water outlet pipe 121 and a rear plasticizing system water outlet pipe 122. One end of the front plasticizing system water outlet pipe 121 is connected to the plasticizing system 2, and the other end is connected to the A port of the two-position four-way electromagnetic reversing valve V3. One end of the rear plasticizing system water outlet pipe 122 is connected to the P port of the two-position four-way electromagnetic reversing valve V3, and the other end is connected to the water outlet main pipe 6.

[0032] Temperature sensors ST are installed on the mold 1, the plasticizing system 2, the oil tank 3, and the electric control cabinet 4. The temperature sensor ST of the mold 1 is used to detect the working temperature of the mold 1. The temperature sensor ST of the plasticizing system 2 is used to detect the plasticizing temperature of the plasticizing system 2. The temperature sensor ST of the oil tank 3 is used to detect the oil temperature of the oil tank 3. The temperature sensor ST of the electric control cabinet 4 is used to detect the temperature inside the electric control cabinet 4.

[0033] In order to achieve a better cooling effect and ensure the reliability of electrical components, the electric control cabinet water inlet pipe 10 is set on the back of the electrical cabinet 4; in order to better absorb heat, the electric control cabinet water inlet pipe 10 is flat, and the wider part is close to the back of the electrical cabinet. In order to better absorb heat, the electric control cabinet water inlet pipe 10 is serpentine.

[0034] A method for temperature detection and control of an injection molding machine is implemented by using the temperature detection and control structure of the injection molding machine. The main cooling medium of the temperature detection and control structure of the injection molding machine is water. The temperature of the system is adjusted mainly by temperature difference so that the system reaches the required temperature. Water enters from the water inlet main pipe 5 and enters the mold 1, the plasticizing system 2, the oil tank 3, and the electric control cabinet 4 through each water inlet pipe. According to needs, throttle valves with remote adjustment are provided on the pipelines entering the mold, the plasticizing system, the oil tank, and the electric control cabinet, and temperature sensors ST are provided at various locations. In order to adapt to the work in a low-temperature environment of the oil, the cooling water is heated by the plasticizing system and transmitted to the oil tank to control the oil temperature. A two-position four-way electromagnetic reversing valve V3 is provided between the outlet pipe of the plasticizing system and the inlet pipe of the oil tank. The circuit constructed between the two includes the following steps:

[0035] (1) The temperature detection and control steps of the plasticizing system and the oil tank are as follows:

[0036] When the equipment is started, the plasticizing system 2 needs to be heated first, and then the oil pump motor is started. Under normal conditions, when the ambient temperature is between 20 and 40 degrees, the oil temperature in the oil tank 3 does not need to be heated or cooled. Figure 2As shown, the No. 2 throttle valve V2 and the No. 3 throttle valve V4 are closed, the valve core of the two-position four-way electromagnetic reversing valve V3 does not move, the P port and the A port are connected, and the T port and the B port are connected. According to the requirements of plastic melting, the plasticizing system 2 is heated. When the plasticizing temperature of the plasticizing system 2 reaches the requirements, the temperature sensor ST of the plasticizing system 2 sends a signal to open the No. 2 throttle valve V2, and adjust the flow rate of cooling water by automatically remotely adjusting the No. 2 throttle valve V2 to keep the plasticizing temperature of the plasticizing system 2 stable. At the same time, when the screw shears and plasticizes, the plasticizing temperature can also be detected by the temperature sensor ST, and the No. 2 throttle valve V2 can be remotely adjusted to adjust the flow rate of cooling water to ensure the temperature of the plasticizing system 2, thereby ensuring the stability of the molten plastic.

[0037] Turn on the oil pump motor, the oil pump works, the hydraulic oil is in working state, the oil temperature in the oil tank 3 will rise, when the oil temperature reaches 50 degrees, the temperature sensor ST of the oil tank 3 will feedback the signal, the throttle valve V4 No. 3 will open to cool the oil temperature, and adjust the throttle valve V4 No. 3 to adjust the cooling water flow as the temperature changes. When the oil temperature is below 20 degrees, or even below 0 degrees, in order to ensure the normal operation of the oil and thus the reliability of the equipment, the oil needs to be heated up. Figure 3 As described above, the No. 2 throttle valve V2 is opened, the No. 3 throttle valve V4 is closed, the two-position four-way electromagnetic reversing valve V3 is electromagnetically energized, the valve core moves, the A port and the B port are connected, the P port and the T port are closed, the front plasticizing system water outlet pipe 121 and the front oil tank water inlet pipe 91 are connected, the water supply channel is opened, and after the plasticizing system 2 is heated, the cooling water set in the plasticizing system 2 is also heated. With the flow of water, the cooling water in the plasticizing system 2 flows into the oil tank 3, and the oil temperature is raised to the working requirement through heat conduction. When the temperature of the plasticizing system and the oil temperature of the oil tank 3 meet the requirements, the temperature sensor ST of the oil tank 3 sends a signal to start the oil pump motor, and the oil pump works. At the same time, according to the continuous operation of the equipment, the oil temperature will rise. Through switching, the two-position four-way electromagnetic reversing valve V3 switches the valve core, so that the P port and the A port are connected, and the T port and the B port are connected, so that the cooling state returns to normal.

[0038] (2) The temperature detection and control steps of mold 1 are as follows: The temperature control of mold 1 is mainly to ensure the rapid cooling and molding of the product. The flow rate of cooling water varies according to the different plastic products. During the production process of the product, the mold temperature is detected and fed back by the temperature sensor ST of mold 1, and the flow rate of mold cooling water is adjusted by adjusting the No. 1 throttle valve V1 to control the speed of mold temperature change, thereby controlling the quality of the product.

[0039] (3) The temperature detection and control steps of the electric control cabinet 4 are as follows: During the injection molding production process, the fans and other radiators often provided in the electric control cabinet generally meet the heat dissipation needs. However, in areas with higher temperatures such as Hainan and Africa, these radiators cannot achieve the expected effect and need to be assisted by cooling water to achieve normal operation of the equipment. In order to facilitate the work in different environments, according to Figure 4 As shown, a No. 4 throttle valve V5 is provided on the water inlet pipe, and the temperature is detected according to the temperature sensor ST on the electrical cabinet. When the temperature is too high, data feedback is performed, and the No. 4 throttle valve V5 is controlled to open the water inlet channel for cooling. According to the temperature, the No. 4 throttle valve V5 is adjusted to adjust the flow of cooling water and control the temperature change speed of the electrical control cabinet 4.

[0040] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A temperature detection control structure for an injection molding machine, comprising a mold, a plasticizing system, an oil tank, an electric control cabinet, a mold water inlet pipe, a plasticizing system water inlet pipe, an oil tank water inlet pipe, an electric control cabinet water inlet pipe, a mold water outlet pipe, a plasticizing system water outlet pipe, an oil tank water outlet pipe and an electric control cabinet water outlet pipe; the mold water inlet pipe and the mold water outlet pipe are both connected to the mold, the plasticizing system water inlet pipe and the plasticizing system water outlet pipe are both connected to the plasticizing system, the oil tank water inlet pipe and the oil tank water outlet pipe are both connected to the oil tank, and the electric control cabinet water inlet pipe and the electric control cabinet water outlet pipe are both connected to the electric control cabinet; characterized in that: It also includes a No. 1 throttle valve, a No. 2 throttle valve, a two-position four-way electromagnetic reversing valve, a No. 3 throttle valve, a No. 4 throttle valve, a water inlet pipe and a water outlet pipe; the water inlet pipe is connected to the mold water inlet pipe, the plasticizing system water inlet pipe, the oil tank water inlet pipe, and the electric control cabinet water inlet pipe; the water outlet pipe is connected to the mold water outlet pipe, the plasticizing system water outlet pipe, the oil tank water outlet pipe, and the electric control cabinet water outlet pipe; the No. 1 throttle valve is installed on the mold water inlet pipe, the No. 2 throttle valve is installed on the plasticizing system water inlet pipe, and the No. 4 throttle valve is installed on the electric control cabinet water inlet pipe; the oil tank water inlet pipe includes a front oil tank water inlet pipe and a rear oil tank water inlet pipe, one end of the front oil tank water inlet pipe is connected to the oil tank, The other end is connected to the B port of the two-position four-way electromagnetic reversing valve, one end of the rear oil tank water inlet pipe is connected to the T port of the two-position four-way electromagnetic reversing valve, and the other end is connected to the water inlet main pipe; the No. 3 throttle valve is installed on the rear oil tank water inlet pipe; the plasticizing system water outlet pipe includes a front plasticizing system water outlet pipe and a rear plasticizing system water outlet pipe, one end of the front plasticizing system water outlet pipe is connected to the plasticizing system, and the other end is connected to the A port of the two-position four-way electromagnetic reversing valve, one end of the rear plasticizing system water outlet pipe is connected to the P port of the two-position four-way electromagnetic reversing valve, and the other end is connected to the water outlet main pipe; the mold, plasticizing system, oil tank, and electric control cabinet are all equipped with temperature sensors.

2. The temperature detection control structure of the injection molding machine according to claim 1, characterized in that: The water inlet pipe of the electric control cabinet is arranged on the back of the electric cabinet.

3. The temperature detection control structure of the injection molding machine according to claim 1, characterized in that: The water inlet pipe of the electric control cabinet is flat, and the wider part is attached to the back of the electric cabinet.

4. The temperature detection control structure of the injection molding machine according to claim 1, characterized in that: The water inlet pipe of the electric control cabinet is serpentine.

5. A temperature detection and control method for an injection molding machine, characterized in that: The method is carried out by using the temperature detection control structure of the injection molding machine according to any one of claims 1 to 4, comprising the following steps: (1) The temperature detection and control steps of the plasticizing system and the oil tank are as follows: When the equipment is started, the plasticizing system needs to be heated first, and then the oil pump motor of the oil tank is started; under normal conditions, the oil temperature of the oil tank does not need to be heated or cooled, the No. 2 throttle valve and the No. 3 throttle valve are closed, the P port and the A port, the T port and the B port of the two-position four-way electromagnetic reversing valve are connected, and the plasticizing system is heated according to the requirements of plastic melting; when the plasticizing temperature of the plasticizing system reaches the requirements, the temperature sensor of the plasticizing system sends a signal, opens the No. 2 throttle valve, and adjusts the No. 2 throttle valve, adjusts the flow of cooling water, so that the plasticizing system maintains a stable plasticizing temperature, and at the same time, when the screw is shearing and plasticizing, the plasticizing temperature is also detected by the temperature sensor, and the No. 2 throttle valve is adjusted, and the flow of cooling water is adjusted to ensure the plasticizing temperature of the plasticizing system, thereby ensuring the stability of the molten plastic; The oil pump motor is turned on, the oil pump works, the hydraulic oil is in working state, and the oil temperature in the oil tank will rise. When the oil temperature reaches a certain temperature, the temperature sensor of the oil tank feeds back a signal, the No. 3 throttle valve is opened to cool the oil temperature, and as the temperature changes, the No. 3 throttle valve is adjusted to adjust the cooling water flow rate; when the oil temperature is lower than a certain temperature, the oil needs to be heated up, the No. 2 throttle valve is opened, the No. 3 throttle valve is closed, the A port and the B port of the two-position four-way electromagnetic reversing valve are connected, the P port and the T port are closed, the front plasticizing system outlet pipe and the front oil tank inlet pipe are connected, and the heated cooling water set in the plasticizing system flows to the oil tank to raise the oil temperature to the working requirements; when the plasticizing temperature of the plasticizing system and the oil temperature of the oil tank meet the requirements, the temperature sensor of the oil tank sends a signal, the oil pump motor is turned on, the oil pump works, and at the same time, according to the continuous operation of the equipment, the oil temperature will rise, the P port and the A port of the two-position four-way electromagnetic reversing valve are connected, and the T port and the B port are connected, so that the cooling state returns to normal; (2) The temperature detection and control steps of the mold are as follows: during the production process of the product, the mold temperature is detected and fed back through the mold temperature sensor, and the flow rate of the mold cooling water is adjusted by adjusting the No. 1 throttle valve to control the temperature change speed of the mold; (3) The temperature detection and control steps of the electric control cabinet are as follows: perform temperature detection according to the temperature sensor on the electric control cabinet, provide feedback when the temperature is too high, control the No. 4 throttle valve to open the water inlet channel for cooling, and adjust the No. 4 throttle valve to adjust the flow of cooling water according to the temperature, thereby controlling the temperature change speed of the electric control cabinet.

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