CN111391261A - Injection molding machine temperature detection control structure and temperature detection control method - Google Patents
Injection molding machine temperature detection control structure and temperature detection control method Download PDFInfo
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- CN111391261A CN111391261A CN202010232905.7A CN202010232905A CN111391261A CN 111391261 A CN111391261 A CN 111391261A CN 202010232905 A CN202010232905 A CN 202010232905A CN 111391261 A CN111391261 A CN 111391261A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7604—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a temperature detection control structure and a temperature detection control method of an injection molding machine, which enable the injection molding machine to work in a suitable temperature state, reduce the waste of water resources and protect pipelines. The first throttling valve is installed on a water inlet pipe of the mold, the second throttling valve is installed on a water inlet pipe of the plasticizing system, and the fourth throttling valve is installed on a water inlet pipe of the electric control cabinet; one end of a water inlet pipe of the front oil tank is connected with the oil tank, the other end of the water inlet pipe of the front oil tank is connected with a port B of the two-position four-way electromagnetic directional valve, one end of a water inlet pipe of the rear oil tank is connected with a port T of the two-position four-way electromagnetic directional valve, and the other end of the water inlet pipe of the rear; the third throttle valve is arranged on a water inlet pipe of the rear oil tank; one end of a water outlet pipe of the front plasticizing system is connected with the plasticizing system, the other end of the water outlet pipe of the front plasticizing system is connected with an A port of the two-position four-way electromagnetic directional valve, one end of a water outlet pipe of the rear plasticizing system is connected with a P port of the two-position four-way electromagnetic directional valve, and the other end of the water outlet pipe of the rear plasticizing system is connected; and temperature sensors are arranged on the die, the plasticizing system, the oil tank and the electric control cabinet.
Description
Technical Field
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 control of an injection molding machine mold, a plasticizing system, an oil tank and an electric control cabinet.
Background
In injection molding production, the temperature that is conventionally controlled is the plasticized part temperature, the oil temperature, the mold temperature, the electronic box temperature, and the like.
Since the oil temperature varies with the viscosity of the oil, the applicable temperature is 20 to 50 degrees, and the application environment temperature of the injection molding machine often varies with different regions and seasons, the maximum environment temperature may be above 40 degrees or below 0 degrees, and 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 temperature of the oil is high, the oil can be cooled by using cooling water, but when the temperature of the oil is lower than 20 ℃, a certain method needs to be adopted to increase the temperature of the oil.
For the plasticizing part, the temperature is required to be considered not to be too high at the discharging part, so that the plastic is melted in advance, the discharging efficiency is low, meanwhile, the melting process of the plastic is required to be accurately controlled for better ensuring the product quality, and therefore, the temperature of the plastic in the charging barrel is kept consistent with the set temperature, the temperature of the plastic can reach a relatively stable value, and the plastic can be adjusted and quickly responded according to the requirement. Due to the pre-molding characteristic of an injection molding machine, the heating effect of a conventional mechanism on the interior of a charging barrel is usually caused by the shearing of a screw and the external heating, and the temperature requirements are inconsistent for producing different plastic products, so that the temperature control requirement is higher, and only the cooling effect is achieved in the industry, but the effective control is not achieved.
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 high, the working efficiency is low, and if the oil temperature is lower than 20 ℃, a hydraulic motor, a valve, a pipeline and the like are easily damaged by sharp turning. Meanwhile, if the oil temperature of the system is too high, the viscosity of hydraulic oil is reduced, leakage is easily caused, the efficiency is reduced, the strength of a smooth oil film is reduced, the abrasion of machinery is accelerated, carbide and silt are generated, the oil is oxidized to accelerate the oil quality deterioration, and an oil seal and a high-pressure rubber tube are too early. This greatly affects the stability and reliability of the injection molding machine. The injection molding machine is applied to different occasions and regions of various industries due to the excellent forming characteristics of the injection molding machine, so that the oil temperature is required to be kept in a normal temperature range for increasing the application occasions of the injection molding machine, but in the industry, the temperature control of each system of the whole injection molding machine is often cooled, and the oil temperature cannot be heated in a self-supporting manner. In addition, in working environments with different temperatures, the oil liquid cooling requirements are different, the prior art does not have a temperature adjusting function, the cooling water flow is constant, the waste is large, and a reliable and green oil liquid cooling system is not formed.
In addition, the working temperature of the electrical control components is limited, but the electrical control components are often arranged in a relatively closed control cabinet, and the temperature of the control cabinet can be rapidly increased under the condition of poor heat dissipation effect due to continuous work of the electrical components, so that the faults of the components are caused. An air conditioner is often installed in the industry, but at a high cost.
In addition, the temperature control of the mold directly influences the quality and the production efficiency of products, and in the plastic injection process and the cooling process, the temperature of a mold runner needs to be treated differently.
To sum up, the most common method of controlling injection molding machine plastify part temperature, fluid temperature, mould temperature, electronic box temperature at present is to lead to water and adjust, but all lead to water alone to every link that needs the cooling, the water valve door is only in simple normal close or normally open state, often not monitor the temperature control effect, thereby make the temperature control do not accomplish effective management, the temperature regulation effect is not good, cause the very big waste of water resource simultaneously, and partial water route is owing to close for a long time, arouse the water service pipe to corrode, lead to the pipeline trouble.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the injection molding machine temperature detection control structure and the injection molding machine temperature detection control method which are reasonable in structural design, so that the injection molding machine can work in a proper temperature state, the waste of water resources is reduced, and pipelines are protected.
The technical scheme adopted by the invention for solving the problems is as follows: a temperature detection control structure of an injection molding machine comprises 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 mould water inlet pipe and the mould water outlet pipe are both connected with a mould, the plasticizing system water inlet pipe and the plasticizing system water outlet pipe are both connected with a plasticizing system, the oil tank water inlet pipe and the oil tank water outlet pipe are both connected with an oil tank, and the electric control cabinet water inlet pipe and the electric control cabinet water outlet pipe are both connected with an electric control cabinet; the method is characterized in that: the water inlet main pipe and the water outlet main pipe are connected with the water inlet main pipe and the water outlet main pipe respectively; the water inlet main pipe is connected with a mold water inlet pipe, a plasticizing system water inlet pipe, an oil tank water inlet pipe and an electric control cabinet water inlet pipe; the water outlet main pipe is connected with a water outlet pipe of the mould, a water outlet pipe of the plasticizing system, a water outlet pipe of the oil tank and a water outlet pipe of the electric control cabinet; the first throttling valve is installed on a water inlet pipe of the mold, the second throttling valve is installed on a water inlet pipe of the plasticizing system, and the fourth throttling valve is installed on a water inlet pipe of the electric control cabinet; the oil tank water inlet pipe comprises 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 with the oil tank, the other end of the front oil tank water inlet pipe is connected with a port B of the two-position four-way electromagnetic directional valve, one end of the rear oil tank water inlet pipe is connected with a port T of the two-position four-way electromagnetic directional valve, and the other end of the rear oil; the third throttle valve is arranged on a water inlet pipe of the rear oil tank; the water outlet pipe of the plasticizing system comprises 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 with the plasticizing system, the other end of the front plasticizing system water outlet pipe is connected with the port A of the two-position four-way electromagnetic reversing valve, one end of the rear plasticizing system water outlet pipe is connected with the port P of the two-position four-way electromagnetic reversing valve, and the other end of the rear plasticizing system water outlet pipe is; and temperature sensors are arranged on the die, the plasticizing system, the oil tank and the electric control cabinet.
The water inlet pipe of the electric cabinet is arranged on the back of the electric cabinet.
The water inlet pipe of the electric control cabinet is flat, and the wider part of the water inlet pipe is attached to the back of the electric appliance cabinet.
The water inlet pipe of the electric control cabinet is snakelike.
The injection molding machine temperature detection control method is carried out by adopting the injection molding machine temperature detection control structure, and comprises the following steps:
(1) the temperature detection control steps of the plasticizing system and the oil tank are as follows:
when the equipment is started, a plasticizing system needs to be heated firstly, and then an oil pump motor of an oil tank needs to be started; under a normal state, the oil temperature of the oil tank does not need heating or cooling treatment, the second throttling valve and the third throttling valve are closed, the P port and the A port of the two-position four-way electromagnetic directional valve are communicated, and the T port and the B port are communicated, and the plasticizing system is heated according to the plastic melting requirement; when the plasticizing temperature of the plasticizing system meets the requirement, a temperature sensor of the plasticizing system sends a signal to open a second throttle valve, adjust the second throttle valve and adjust the flow of cooling water, so that the plasticizing system keeps a stable plasticizing temperature;
starting an oil pump motor, enabling an oil pump to work, enabling hydraulic oil to be in a working state, enabling the oil temperature of an oil tank to rise, enabling a temperature sensor of the oil tank to feed back a signal when the oil temperature is high to a certain temperature, enabling a third throttle valve to be opened, cooling the oil temperature, adjusting the third throttle valve along with the temperature change, and adjusting the cooling water flow; when the oil temperature is lower than a certain temperature, the temperature of the oil liquid needs to be raised, a second throttling valve is opened, a third throttling valve is closed, an A port and a B port of a two-position four-way electromagnetic directional valve are communicated, a P port and a T port are closed, a water outlet pipe of a front plasticizing system is communicated with a water inlet pipe of a front oil tank, heated cooling water arranged in the plasticizing system flows to the oil tank, and the oil temperature is improved to meet the working requirement; 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 started, the oil pump works, meanwhile, according to the continuous work of equipment, the oil temperature will rise, the P port and the A port of the two-position four-way electromagnetic directional valve are communicated, the T port and the B port are communicated, and the cooling state is recovered to be normal.
(2) The temperature detection control steps of the die are as follows: in the production process of products, the temperature of the die is detected and fed back by a temperature sensor of the die, and the flow of cooling water of the die is adjusted by adjusting a first throttle valve to control the temperature change speed of the die;
(3) the temperature detection control steps of the control cabinet are as follows: temperature detection is carried out according to the temperature sensor on the electric control cabinet, feedback is carried out when the temperature is too high, the water inlet channel is opened by controlling the four throttle valves to carry out cooling, and the flow of cooling water is adjusted by adjusting the four throttle valves according to the temperature, so that the temperature change speed of the control cabinet is controlled.
Compared with the prior art, the invention has the following advantages and effects: the invention enables the injection molding machine to work in a suitable temperature state, particularly enables the injection molding equipment to work in a low temperature state, reduces the waste of water resources, can accurately control the temperature, has better effect and protects pipelines.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a partial structure in a normal state according to an embodiment of the present invention.
Fig. 3 is a schematic view of a partial structure in a low temperature state according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of the back of the electric control cabinet according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1-4, the temperature detection control structure of the injection molding machine in the embodiment of the invention comprises a mold 1, a plasticizing system 2, an oil tank 3, an electric control cabinet 4, a first throttle valve V1, a second throttle valve V2, a two-position four-way electromagnetic directional valve V3, a third throttle valve V4, a fourth throttle valve V5, a water inlet header pipe 5, a water outlet header 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.
The mould inlet tube 7 and the mould outlet pipe 11 are both connected with the mould 1, the plasticizing system inlet tube 8 and the plasticizing system outlet pipe 12 are both connected with the plasticizing system 2, the oil tank inlet tube 9 and the oil tank outlet pipe 13 are both connected with the oil tank 3, and the electric control cabinet inlet tube 10 and the electric control cabinet outlet pipe 14 are both connected with the electric control cabinet 4.
The water inlet main pipe 5 is connected with a mould water inlet pipe 7, a plasticizing system water inlet pipe 8, an oil tank water inlet pipe 9 and an electric control cabinet water inlet pipe 10. The water outlet main pipe 6 is connected with 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.
A first throttle valve V1 is mounted on the die inlet pipe 7. And a second throttle valve V2 is arranged on the water inlet pipe 8 of the plasticizing system. And a fourth throttle valve V5 is installed on the water inlet pipe 10 of the electric control cabinet.
The oil tank inlet tube 9 includes preceding oil tank inlet tube 91 and back oil tank inlet tube 92, and preceding oil tank inlet tube 91 one end is connected with oil tank 3, and the other end is connected with two four-way solenoid directional valve V3's B mouth, and back oil tank inlet tube 92 one end is connected with two four-way solenoid directional valve V3's T mouth, and the other end is connected with intake manifold 5. And a third throttle valve V4 is mounted on the rear oil tank water inlet pipe 92.
The plasticizing system water outlet pipe 12 comprises 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 with the plasticizing system 2, the other end of the front plasticizing system water outlet pipe is connected with the port A of the two-position four-way electromagnetic directional valve V3, one end of the rear plasticizing system water outlet pipe 122 is connected with the port P of the two-position four-way electromagnetic directional valve V3, and the other end of the rear plasticizing system water outlet pipe is.
And temperature sensors ST are arranged on the die 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 operating 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 tank 3 detects the temperature of the oil in the tank 3. The temperature sensor ST of the electric control cabinet 4 is used for detecting the temperature in the electric control cabinet 4.
In order to better play a role in cooling and ensure the reliability of electrical elements, the water inlet pipe 10 of the electrical cabinet is arranged on the back of the electrical cabinet 4; in order to better absorb heat, the water inlet pipe 10 of the electric control cabinet is flat, and the wider part is attached to the back of the electric appliance cabinet. In order to better absorb heat, the water inlet pipe 10 of the electric control cabinet is in a snake shape.
The injection molding machine temperature detection control structure is adopted for carrying out temperature detection, the main cooling medium of the injection molding machine temperature detection control structure is water, and temperature adjustment of a system is carried out mainly through temperature difference, so that the system reaches the required temperature. Water enters the mould 1, the plasticizing system 2, the oil tank 3 and the electric control cabinet 4 from the water inlet main pipe 5 through the water inlet pipes respectively, and throttle valves with remote adjustment are arranged on pipelines entering the mould, the plasticizing system, the oil tank and the control cabinet respectively according to requirements, and meanwhile, temperature sensors ST are arranged on all parts. For the work under the adaptation fluid low temperature environment, utilize the plasticizing system to heat cooling water to conduct oil tank control oil liquid temperature, set up two four-way solenoid directional valve V3 between the outlet conduit of plasticizing system and the inlet conduit of oil tank, the return circuit of putting up between the two includes following step:
(1) the temperature detection control steps of the plasticizing system and the oil tank are as follows:
when the equipment is started, the plasticizing system 2 needs to be heated firstly, and then the oil pump motor is started. In a normal state, when the ambient temperature is 20-40 ℃, the oil temperature of the oil tank 3 does not need to be heated or cooled, and according to the illustration in fig. 2, the second throttle valve V2 and the third throttle valve V4 are closed, the valve core of the two-position four-way electromagnetic directional valve V3 is not moved, the port P is communicated with the port a, the port T is communicated with the port B, and according to the requirement of plastic melting, heating the plasticizing system 2, when the plasticizing temperature of the plasticizing system 2 reaches the requirement, sending a signal by a temperature sensor ST of the plasticizing system 2, opening a second throttle valve V2, and the flow of the cooling water is adjusted by automatically and remotely adjusting a second throttle valve V2 to ensure that the plasticizing system 2 keeps stable plasticizing temperature, meanwhile, when the screw shear plasticizing movement is carried out, the plasticizing temperature can be detected through the temperature sensor ST, and the flow of cooling water is adjusted by remotely adjusting a second throttle valve V2, so that the temperature of the plasticizing system 2 is ensured, and the stability of the molten plastic is ensured.
When the oil temperature is 50 ℃, a temperature sensor ST of the oil tank 3 feeds back a signal, a third throttle valve V4 is opened to cool the oil temperature, and the third throttle valve V4 is adjusted along with the temperature change to adjust the cooling water flow. When the oil temperature is lower than 20 degrees, even lower than 0 degree, for guaranteeing the normal work of fluid, thereby guarantee that the equipment is reliable, need heat up fluid, according to fig. 3, open No. two choke valves V2, close No. three choke valves V4, two cross solenoid directional valves V3 electromagnetism is electrified, and the case removes, makes A mouthful and B mouthful intercommunication, and P mouth and T mouth are closed, and preceding plasticizing system outlet pipe 121 and preceding oil tank inlet tube 91 switch-on open the water supply passageway, and plasticizing system 2 heats the back, and the cooling water that sets up in plasticizing system 2 is heated simultaneously, and along with the flow of water, the cooling water in plasticizing system 2 flows to the oil tank 3 in, through heat conduction, will promote the oil temperature to the operational requirement. When the temperature of the plasticizing system and the temperature of oil in 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, the oil pump works, meanwhile, according to the continuous work of equipment, the oil temperature will rise, and through switching, the two-position four-way electromagnetic directional valve V3 switches the valve cores, so that the port P and the port A are communicated, the port T and the port B are communicated, and the cooling state is recovered to the normal state.
(2) The temperature detection control steps of the die 1 are as follows: the temperature of the mould 1 is controlled to mainly ensure that the product is rapidly cooled and formed, and the flow of cooling water is different according to different plastic products. In the production process of the product, the temperature sensor ST of the die 1 is used for detecting and feeding back the die temperature, the flow of the cooling water of the die is adjusted by adjusting the first throttle valve V1, and the temperature change speed of the die is controlled, so that the quality of the product is controlled.
(3) The temperature detection control steps of the control cabinet 4 are as follows: in the injection production process, the radiators such as fans and the like frequently arranged on the control cabinet generally meet the heat dissipation requirements, but in areas with higher temperature, such as Hainan areas and Africa areas, the action of the radiators cannot achieve the expected effect, auxiliary cooling needs to be carried out through cooling water to achieve normal operation of equipment, in order to conveniently adapt to work in different environments, according to the scheme shown in figure 4, a fourth throttle valve V5 is arranged on a water inlet pipeline, temperature detection is carried out according to a temperature sensor ST on an electric cabinet, data feedback is carried out when the temperature is too high, a water inlet channel is opened by controlling the fourth throttle valve V5 to carry out cooling, the flow of the cooling water is adjusted by adjusting the fourth throttle valve V5 according to the temperature, and the temperature change speed of the control cabinet 4 is controlled.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. A temperature detection control structure of an injection molding machine comprises 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 mould water inlet pipe and the mould water outlet pipe are both connected with a mould, the plasticizing system water inlet pipe and the plasticizing system water outlet pipe are both connected with a plasticizing system, the oil tank water inlet pipe and the oil tank water outlet pipe are both connected with an oil tank, and the electric control cabinet water inlet pipe and the electric control cabinet water outlet pipe are both connected with an electric control cabinet; the method is characterized in that: the water inlet main pipe and the water outlet main pipe are connected with the water inlet main pipe and the water outlet main pipe respectively; the water inlet main pipe is connected with a mold water inlet pipe, a plasticizing system water inlet pipe, an oil tank water inlet pipe and an electric control cabinet water inlet pipe; the water outlet main pipe is connected with a water outlet pipe of the mould, a water outlet pipe of the plasticizing system, a water outlet pipe of the oil tank and a water outlet pipe of the electric control cabinet; the first throttling valve is installed on a water inlet pipe of the mold, the second throttling valve is installed on a water inlet pipe of the plasticizing system, and the fourth throttling valve is installed on a water inlet pipe of the electric control cabinet; the oil tank water inlet pipe comprises 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 with the oil tank, the other end of the front oil tank water inlet pipe is connected with a port B of the two-position four-way electromagnetic directional valve, one end of the rear oil tank water inlet pipe is connected with a port T of the two-position four-way electromagnetic directional valve, and the other end of the rear oil; the third throttle valve is arranged on a water inlet pipe of the rear oil tank; the water outlet pipe of the plasticizing system comprises 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 with the plasticizing system, the other end of the front plasticizing system water outlet pipe is connected with the port A of the two-position four-way electromagnetic reversing valve, one end of the rear plasticizing system water outlet pipe is connected with the port P of the two-position four-way electromagnetic reversing valve, and the other end of the rear plasticizing system water outlet pipe is; and temperature sensors are arranged on the die, the plasticizing system, the oil tank and the electric control cabinet.
2. The temperature detection control structure of an injection molding machine according to claim 1, characterized in that: the electric cabinet water inlet pipe is arranged on the back of the electric cabinet.
3. The temperature detection control structure of an 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 appliance cabinet.
4. The temperature detection control structure of an injection molding machine according to claim 1, characterized in that: the water inlet pipe of the electric control cabinet is snakelike.
5. A temperature detection control method of an injection molding machine is characterized by comprising the following steps: the temperature detection control structure of the injection molding machine according to any one of claims 1 to 4 is adopted, and comprises the following steps:
(1) the temperature detection control steps of the plasticizing system and the oil tank are as follows:
when the equipment is started, a plasticizing system needs to be heated firstly, and then an oil pump motor of an oil tank needs to be started; under a normal state, the oil temperature of the oil tank does not need heating or cooling treatment, the second throttling valve and the third throttling valve are closed, the P port and the A port of the two-position four-way electromagnetic directional valve are communicated, and the T port and the B port are communicated, and the plasticizing system is heated according to the plastic melting requirement; when the plasticizing temperature of the plasticizing system meets the requirement, a temperature sensor of the plasticizing system sends a signal to open a second throttle valve, adjust the second throttle valve and adjust the flow of cooling water, so that the plasticizing system keeps a stable plasticizing temperature;
starting an oil pump motor, enabling an oil pump to work, enabling hydraulic oil to be in a working state, enabling the oil temperature of an oil tank to rise, enabling a temperature sensor of the oil tank to feed back a signal when the oil temperature is high to a certain temperature, enabling a third throttle valve to be opened, cooling the oil temperature, adjusting the third throttle valve along with the temperature change, and adjusting the cooling water flow; when the oil temperature is lower than a certain temperature, the temperature of the oil liquid needs to be raised, a second throttling valve is opened, a third throttling valve is closed, an A port and a B port of a two-position four-way electromagnetic directional valve are communicated, a P port and a T port are closed, a water outlet pipe of a front plasticizing system is communicated with a water inlet pipe of a front oil tank, heated cooling water arranged in the plasticizing system flows to the oil tank, and the oil temperature is improved to meet the working requirement; when the plasticizing temperature of the plasticizing system and the oil temperature of the oil tank meet the requirements, a temperature sensor of the oil tank sends a signal, an oil pump motor is started, the oil pump works, and meanwhile, according to the continuous work of equipment, the oil temperature will rise, and a port P and a port A, a port T and a port B of the two-position four-way electromagnetic directional valve are communicated, so that the cooling state is recovered to be normal;
(2) the temperature detection control steps of the die are as follows: in the production process of products, the temperature of the die is detected and fed back by a temperature sensor of the die, and the flow of cooling water of the die is adjusted by adjusting a first throttle valve to control the temperature change speed of the die;
(3) the temperature detection control steps of the control cabinet are as follows: temperature detection is carried out according to the temperature sensor on the electric control cabinet, feedback is carried out when the temperature is too high, the water inlet channel is opened by controlling the four throttle valves to carry out cooling, and the flow of cooling water is adjusted by adjusting the four throttle valves according to the temperature, so that the temperature change speed of the control cabinet is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010232905.7A CN111391261A (en) | 2020-03-28 | 2020-03-28 | Injection molding machine temperature detection control structure and temperature detection control method |
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| CN202010232905.7A CN111391261A (en) | 2020-03-28 | 2020-03-28 | Injection molding machine temperature detection control structure and temperature detection control method |
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| CN115320051A (en) * | 2022-10-17 | 2022-11-11 | 南通协盈电子科技有限公司 | Control method of plastic molding injection mold |
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