CN116100772A - Overheat protection method and overheat protection system for injection molding machine - Google Patents
Overheat protection method and overheat protection system for injection molding machine Download PDFInfo
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- CN116100772A CN116100772A CN202310117392.9A CN202310117392A CN116100772A CN 116100772 A CN116100772 A CN 116100772A CN 202310117392 A CN202310117392 A CN 202310117392A CN 116100772 A CN116100772 A CN 116100772A
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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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- 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
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
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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
- B29C45/72—Heating or cooling
- B29C2045/7292—Recovering waste heat
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an overheat protection method and a overheat protection system for an injection molding machine, wherein the overheat protection method comprises a temperature acquisition module, an overheat protection module, an injection molding pipe and a temperature control ring positioned on the injection molding pipe, the temperature control ring comprises a fixed sleeve, a heating coil is spirally arranged in the fixed sleeve, a cooling component is arranged in the fixed sleeve, temperature information and pressure data in the injection molding pipe are acquired through the information acquisition module, the temperature information is processed to obtain coefficient temperature in the injection molding pipe, a coefficient temperature threshold value is compared with the coefficient temperature in the injection molding pipe to obtain regulation information of high-temperature early warning and regulation information of normal temperature, after one high-temperature early warning appears in the injection molding pipe, the material heating coefficient is acquired by combining the pressure data in the injection molding pipe, and when the material heating coefficient is abnormal, the temperature on the injection molding pipe is absorbed through the cooling component, so that overheat of the injection molding barrel of the injection molding machine can be avoided, and the phenomenon of caking of the material in the injection molding pipe is greatly reduced.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to an overheat protection method and system for an injection molding machine.
Background
Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment for producing plastic products of various shapes from thermoplastic or thermosetting plastics by using plastic molding dies, and are divided into vertical, horizontal and all-electric type, and the injection molding machines can heat the plastics, apply high pressure to the molten plastics, and make the molten plastics be ejected to fill the die cavity of the dies.
The Chinese patent discloses a temperature control system (publication No. CN 111391260B) of an injection molding machine, which can independently heat plastic solution in an injection molding pipe through a spiral heating rod, so that the problem that the temperature in an injection molding port cannot be independently regulated due to the fact that a material guiding pipe and the injection molding pipe are controlled by the same temperature control structure is avoided, but the temperature of the material in the injection molding pipe is regulated in a pressure regulating manner, the speed is low, heat in the injection molding pipe cannot be dissipated after the heating temperature is too high, and plastic caking still possibly occurs in the injection molding pipe.
Disclosure of Invention
The invention aims to provide an overheat protection method and a overheat protection system for an injection molding machine, which are characterized in that temperature information and pressure data in an injection molding pipe are acquired through an information acquisition module, the temperature information is processed to obtain coefficient temperature in the injection molding pipe, a coefficient temperature threshold value is compared with the coefficient temperature in the injection molding pipe to obtain control information of high-temperature early warning and control information of normal temperature, after the control information of one high-temperature early warning appears in the injection molding pipe, the material heating coefficient is acquired by combining the pressure data in the injection molding pipe, and when the material heating coefficient is abnormal, heat on the injection molding pipe is absorbed through a cooling component, so that overheat of an injection molding cylinder of the injection molding machine can be avoided, and the phenomenon that materials agglomerate in the injection molding pipe is greatly reduced.
The aim of the invention can be achieved by the following technical scheme:
an overheat protection system of an injection molding machine comprises a temperature acquisition module, an overheat protection module, an injection molding pipe and a temperature control ring positioned on the injection molding pipe;
the temperature control ring comprises a fixed sleeve, a heating coil is spirally arranged in the fixed sleeve, a cooling component is arranged in the fixed sleeve, and a plurality of information sensors for detecting the temperature in the injection molding pipe are arranged on the fixed sleeve in a penetrating manner;
the information acquisition module is used for: the temperature control method comprises the steps of acquiring temperature information and pressure data in an injection molding pipe, processing the acquired temperature information to obtain data temperature, and comparing the data temperature with a coefficient temperature threshold value to obtain regulation information;
the temperature information comprises temperature change data in the injection molding pipe and injection molding temperature data during injection molding, wherein the temperature change data in the injection molding pipe is the difference between the average temperature in the injection molding pipe during injection molding and the temperature data detected by the information sensor;
the overheat protection module: the temperature control device is used for receiving the control information sent by the temperature acquisition module and controlling the temperature in the injection molding pipe through the PLC controller.
As a further scheme of the invention: the cooling assembly comprises a water flowing channel and a water storage cavity, wherein the water flowing channel and the water storage cavity are arranged in the fixed sleeve in a spiral mode, one end of the water flowing channel is communicated with the water storage cavity, and the other end of the water flowing channel is communicated with one side of the water storage cavity through a communicating valve.
As a further scheme of the invention: the water storage cavity is annularly arranged, the water storage cavity is positioned on the conical surface of the injection molding pipe, and the information sensor is arranged in a plurality of annular arrays.
As a further scheme of the invention: the processing of the temperature of the data to be acquired comprises the following steps:
s1: respectively marking the injection molding temperature data detected by an information sensor in a ring shape as Ta i Wherein i=1, 2 … … n;
the ratio of the temperature change data in the injection tube to the temperature threshold is marked as B i;
s2: by the formula
Obtaining the coefficient temperature Xa in the injection molding pipe, wherein m 1 、m 2 ……m n Are all preset proportional coefficients, and m 1 +m 2 +......+m 3 Not equal to 0, and α and β are both correction factors, where α=0.215, β=1.21;
s3: if the coefficient temperature Xa is more than or equal to the coefficient temperature threshold value, judging that the temperature in the injection pipe is abnormal at the moment, and producing the regulation and control information of high-temperature early warning;
if the coefficient temperature Xa is smaller than the coefficient temperature threshold value, judging that the temperature in the injection molding pipe is normal at the moment, and generating regulation and control information of the normal temperature.
As a further scheme of the invention: the overheat protection module acquires a plurality of pieces of regulation information on the injection molding pipe, wherein the pieces of regulation information comprise regulation information of one high-temperature early warning, and basic information in the injection molding process is detected;
the basic information comprises pressure data in an injection molding pipe during injection molding and viscosity data of materials during injection molding.
As a further scheme of the invention: the basic information is detected by the following processing mode:
s1: the difference between the average temperature of the injection pipe and the temperature of the pouring opening of the injection mold, into which the raw materials enter, is marked as Ci;
the average value of the quotient of the pressure data in the injection pipe and the raw material mixing temperature is marked as Ai;
s2: calculation by formula
Obtaining the material heating coefficient Yi, wherein b 1 And b 2 Are all preset proportional coefficients, and b 1 ＞0,b 2 > 0, epsilon is a correction factor, epsilon=2.14;
s3: if the material heating coefficient Yi is more than or equal to the material change coefficient threshold, judging that the material is heated abnormally, and generating an overheat protection signal;
if the material heating coefficient Yi is smaller than the material change coefficient threshold, judging that the material is heated normally, generating a maintenance signal, and maintaining the cooling component in a state.
As a further scheme of the invention: after receiving the overheat protection signal, the PLC controller regulates and controls the cooling component as follows:
s1: after receiving the overheat protection signal, the PLC controller opens a communication valve communicated with the water flow channel, and injects cooling water into the water flow channel so as to flow into the water storage cavity, and at the moment, the cooling water absorbs heat on the surface of the injection molding pipe;
s2: after receiving the overheat protection signal again, the PLC opens the two communication valves, then discharges the cooling water in the water flowing channel and the water storage cavity, and re-injects the cooling water into the water flowing channel and the water storage cavity.
As a further scheme of the invention: the PLC receives the maintenance signal, and at the moment, the two communication valves are in a closed state and kept unchanged.
The invention also discloses an overheat protection method of the injection molding machine, when the injection molding pipe is used for injection molding, temperature information and pressure data in the injection molding pipe are obtained through the information acquisition module, the obtained temperature information is processed to obtain coefficient temperature Xa, then the coefficient temperature Xa is compared with a preset coefficient temperature threshold value to obtain regulation information, according to whether a plurality of groups of regulation information contain high-temperature early warning regulation information or not, if the regulation information contains the pressure data of the injection molding pipe, the material heating coefficient Yi is obtained by combining the pressure data of the injection molding pipe, and compared with the preset material change coefficient threshold value, a corresponding overheat protection signal and a maintenance signal are generated, then the overheat protection module is used for controlling the temperature reduction component to avoid the overhigh injection molding temperature of the injection molding machine, and if the regulation information does not contain the high-temperature early warning regulation information, the overheat protection method is continuously monitored at the moment.
The invention has the beneficial effects that:
(1) According to the invention, the temperature information and the pressure data in the injection molding pipe are acquired through the information acquisition module, the temperature information is processed to obtain the coefficient temperature in the injection molding pipe, the coefficient temperature threshold value is compared with the coefficient temperature in the injection molding pipe to obtain the control information of high-temperature early warning and the control information of normal temperature, after the control information of one high-temperature early warning appears in the injection molding pipe, the material heating coefficient is acquired by combining the pressure data in the injection molding pipe, and when the material heating coefficient is abnormal, the heat on the injection molding pipe is absorbed through the cooling component, so that the overheating of an injection molding cylinder of the injection molding machine can be avoided, and the phenomenon that the material is agglomerated in the injection molding pipe is greatly reduced.
(2) According to the invention, the injection molding pipe is wrapped through the temperature control ring, the water flowing channel and the water storage cavity are arranged on the temperature control ring, cooling water is injected into the water flowing channel and the water storage cavity, so that the heat on the surface of the injection molding pipe can be absorbed, the heat is stored in the cooling water, the water storage cavity wraps the conical surface of the injection molding pipe, thus the materials on the end surface can be insulated, the phenomenon of solidification of the materials at the position of the conical surface is avoided, the materials can be cooled through the temperature control ring, and meanwhile, the heat can be collected and reused.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an overheat protection system according to the present invention;
fig. 2 is a partial structural cross-sectional view of an injection molded tube according to the present invention.
In the figure: 1. injection molding a tube; 2. a temperature control ring; 3. a heating coil; 4. a cooling component; 41. a water flow channel; 42. a water storage chamber; 43. and a communication valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the invention discloses an overheat protection system of an injection molding machine, which comprises a temperature acquisition module, an overheat protection module, an injection molding pipe 1 and a temperature control ring 2 positioned on the injection molding pipe 1;
it will be appreciated that during the time that the material is entering the injection tube from the feed tube and entering the forming die from the injection port of the injection tube by extrusion, the temperature in the injection tube needs to be raised, and a higher pressure is formed in the injection tube at this time, and under the effect of the pressure rise, the boiling point of the plastic solution is raised, and both the temperature and the pressure have an influence on the material during heating.
The temperature control ring 2 comprises a fixed sleeve, a heating coil 3 is spirally arranged in the fixed sleeve, a cooling component 4 is arranged in the fixed sleeve, the cooling component 4 is used for cooling an injection molding pipe, a plurality of information sensors used for detecting the temperature in the injection molding pipe 1 are penetratingly arranged on the fixed sleeve, the information sensors are electrically connected with an information acquisition module, and the information sensors are integrated sensors and can acquire temperature and pressure data;
the information acquisition module is used for: the temperature control method comprises the steps of acquiring temperature information and pressure data in an injection molding pipe 1, processing the acquired temperature information to obtain data temperature, and comparing the data temperature with a coefficient temperature threshold value to obtain control information;
the temperature information comprises temperature change data in the injection molding pipe 1 and injection molding temperature data during injection molding, wherein the temperature change data in the injection molding pipe 1 is the difference between the average temperature in the injection molding pipe 1 during injection molding and the temperature data detected by the information sensor;
the overheat protection module: the temperature control device is used for receiving the control information sent by the temperature acquisition module and controlling the temperature in the injection molding pipe 1 through the temperature reduction component 4 by the PLC according to the pressure in the injection molding pipe 1.
It should be noted that, the information acquisition module is electrically connected with the overheat protection module, and the information acquisition module and the overheat protection module have a certain processing capacity on data.
As a preferred embodiment, the cooling component 4 includes a water flowing channel 41 and a water storage cavity 42 that are disposed in a fixed sleeve and are spirally disposed, one end of the water flowing channel 41 is connected to the water storage cavity 42, one side of the other end of the water flowing channel 41 and one side of the water storage cavity 42 are both connected to a communication valve 43, the communication valve 43 that is connected to the water flowing channel 42 is connected to an external cooling water pipe, and the communication valve 43 that is connected to the water storage cavity 42 is connected to a drainage pipe, the water storage cavity 42 is disposed in a ring shape, and wraps the conical surface of the injection molding pipe 1, when cooling water is injected into the water flowing channel 41 and the water storage cavity 42, the communication valve 43 that is connected to the water storage cavity 42 is closed at this time, so that cooling water that absorbs heat can be stored in the water storage cavity 42, thereby preserving the conical surface of the injection molding pipe 1, and the water storage cavity 42 is disposed on the conical surface of the injection molding pipe 1, and the information sensor is disposed in a ring array in four groups, so as to avoid temperature or pressure in the injection molding pipe from being uneven, and detect the injection molding pipe in multiple directions.
The processing of the temperature of the data to be acquired comprises the following steps:
s1: respectively marking the injection molding temperature data detected by an information sensor in a ring shape as Ta i Wherein i=1, 2 … … n;
the ratio of the temperature change data in the injection molding pipe 1 to the temperature threshold value is marked as Bi;
s2: by the formula
Obtaining the coefficient temperature Xa in the injection molding pipe 1, wherein m 1 、m 2 ……m n Are all preset proportional coefficients, and m 1 +m 2 +......+m 3 Not equal to 0, and α and β are both correction factors, where α=0.215, β=1.21;
s3: if the coefficient temperature Xa is more than or equal to the coefficient temperature threshold value, judging that the temperature in the injection molding pipe 1 is abnormal at the moment, and producing the regulation and control information of high-temperature early warning;
if the coefficient temperature Xa is less than the coefficient temperature threshold value, judging that the temperature in the injection molding pipe 1 is normal at the moment, and generating regulation and control information of the normal temperature, wherein the coefficient temperature threshold value is set manually.
The method comprises the steps that a plurality of pieces of regulation information on the injection molding pipe 1 are sent to a thermal protection module through a PLC, the pieces of regulation information comprise regulation information of one piece of high-temperature early warning, basic information in the injection molding process is detected, if all pieces of regulation information of normal temperature are not contained in the regulation information, the fact that the temperature in the injection molding pipe is under the maximum pressure which can be adapted to the injection molding pipe is described, and the phenomenon of material agglomeration does not occur;
the basic information includes pressure data in the injection tube 1 at the time of injection molding and viscosity data of the material at the time of injection molding.
The basic information is detected by the following processing mode:
s1: the difference between the average temperature of the injection pipe 1 and the temperature of the pouring opening of the injection mold, into which the raw material enters, is marked as Ci;
the average value of the quotient of the pressure data in the injection tube 1 and the raw material mixing temperature is marked as Ai;
s2: calculation by formula
Obtaining the material heating coefficient Yi, wherein b 1 And b 2 Are all preset proportional coefficients, and b 1 ＞0,b 2 > 0, epsilon is a correction factor, epsilon=2.14;
s3: if the material heating coefficient Yi is more than or equal to the material change coefficient threshold, judging that the material is heated abnormally, and generating an overheat protection signal;
if the material heating coefficient Yi is smaller than the material change coefficient threshold, the material is judged to be heated normally, a maintenance signal is generated, and the cooling component 4 keeps the state, wherein the material change coefficient threshold is judged manually.
After the PLC receives the overheat protection signal, the temperature reducing component 4 is regulated as follows:
s1: after receiving the overheat protection signal, the PLC controller opens the communication valve 43 communicated with the water flow channel 41, and injects cooling water into the water flow channel 41 so as to flow into the water storage cavity 42, and at the moment, the cooling water absorbs heat on the surface of the injection molding pipe 1;
s2: when the PLC controller receives the overheat protection signal again, the two communication valves 43 are opened, and then the cooling water in the water flow channel 41 and the water storage chamber 42 is discharged, and the cooling water is again injected into the water flow channel 41 and the water storage chamber 42, and the communication valve 43 communicating with the water storage chamber 42 is closed to absorb heat again.
When the PLC receives the maintenance signal, the two communication valves 43 are in the closed state and kept unchanged, and the heat absorbed by the cooling water keeps the temperature of the conical surface of the injection molding pipe 1.
The invention also discloses an overheat protection method of the injection molding machine, when the injection molding pipe 1 is used for injection molding, temperature information and pressure data in the injection molding pipe 1 are obtained through an information acquisition module, the obtained temperature information is processed to obtain coefficient temperature Xa, then the coefficient temperature Xa is compared with a preset coefficient temperature threshold value to obtain regulation information, according to whether a plurality of groups of regulation information contain high-temperature early warning regulation information or not, if the regulation information contains the high-temperature early warning regulation information, the material heating coefficient Yi is obtained by combining the pressure data of the injection molding pipe 1, and compared with the preset material change coefficient threshold value, a corresponding overheat protection signal and a maintenance signal are generated, the overheat protection module cooling component 4 is used for controlling, so that the injection molding temperature of the injection molding machine is prevented from being too high, and if the regulation information of the high-temperature early warning is not contained, the material heating coefficient Yi is continuously monitored at the moment.
One of the key points of the application is as follows: the temperature information and the pressure data in the injection molding pipe are acquired through the information acquisition module, the temperature information is processed to obtain the coefficient temperature in the injection molding pipe, the coefficient temperature threshold value is compared with the coefficient temperature in the injection molding pipe, the regulation information of high-temperature early warning and the regulation information of normal temperature are obtained, after the regulation information of one high-temperature early warning appears in the injection molding pipe, the material heating coefficient is acquired by combining the pressure data in the injection molding pipe, and when the material heating coefficient is abnormal, the temperature on the injection molding pipe is absorbed through the cooling component, so that the overheating of an injection molding barrel of an injection molding machine can be avoided, and the phenomenon that the material is agglomerated in the injection molding pipe is reduced to a great extent.
Second key point of the application is: the temperature control ring wraps the injection molding pipe, the water flowing channel and the water storage cavity are arranged on the temperature control ring, cooling water is injected into the water flowing channel and the water storage cavity, heat on the surface of the injection molding pipe can be absorbed, the heat is stored in the cooling water, the water storage cavity wraps the conical surface of the injection molding pipe, so that materials located on the end face can be insulated, the phenomenon that the materials staying at the position of the conical surface are solidified is avoided, the temperature of the materials can be reduced, and meanwhile, the heat can be collected and reused
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. An overheat protection system of an injection molding machine is characterized by comprising a temperature acquisition module, an overheat protection module, an injection molding pipe (1) and a temperature control ring (2) positioned on the injection molding pipe (1);
the temperature control ring (2) comprises a fixed sleeve, a heating coil (3) is spirally arranged in the fixed sleeve, a cooling component (4) is arranged in the fixed sleeve, and a plurality of information sensors for detecting the temperature in the injection molding pipe (1) are arranged on the fixed sleeve in a penetrating manner;
the information acquisition module is used for: the temperature control method comprises the steps of acquiring temperature information and pressure data in an injection molding pipe (1), processing the acquired temperature information to obtain data temperature, and comparing the data temperature with a coefficient temperature threshold value to obtain control information;
the temperature information comprises temperature change data in the injection molding pipe (1) and injection molding temperature data during injection molding, wherein the temperature change data in the injection molding pipe (1) is the difference between the average temperature in the injection molding pipe (1) during injection molding and the temperature data detected by the information sensor;
the overheat protection module: the temperature control device is used for receiving the control information sent by the temperature acquisition module and controlling the temperature in the injection molding pipe (1) through the temperature reduction component (4) by the PLC according to the pressure in the injection molding pipe (1).
2. The overheat protection system of the injection molding machine according to claim 1, wherein the cooling component (4) comprises a water flowing channel (41) and a water storage cavity (42) which are spirally arranged in the fixed sleeve, one end of the water flowing channel (41) is communicated with the water storage cavity (42), and the other end of the water flowing channel (41) is communicated with one side of the water storage cavity (42) through a communication valve (43).
3. An overheat protection system of an injection molding machine according to claim 2, characterized in that the water storage chamber (42) is arranged in a ring shape, and the water storage chamber (42) is located on the conical surface of the injection molding tube (1), and the information sensors are arranged in a plurality of ring arrays.
4. The overheat protection system of the injection molding machine according to claim 1, wherein the processing of the temperature of the data to be acquired comprises the steps of:
s1: respectively marking the injection molding temperature data detected by an information sensor in a ring shape as Ta i Wherein i=1, 2 … … n;
the ratio of the temperature change data in the injection molding pipe (1) to the temperature threshold value is marked as Bi;
s2: by the formula
Obtaining a coefficient temperature Xa in the injection tube (1), wherein m 1 、m 2 ……m n Are all preset proportional coefficients, and m 1 +m 2 +......+m 3 Not equal to 0, and α and β are both correction factors, where α=0.215, β=1.21;
s3: if the coefficient temperature Xa is more than or equal to the coefficient temperature threshold value, judging that the temperature in the injection molding pipe (1) is abnormal at the moment, and producing the regulation and control information of high-temperature early warning;
if the coefficient temperature Xa is smaller than the coefficient temperature threshold value, judging that the temperature in the injection molding pipe (1) is normal at the moment, and generating regulation and control information of the normal temperature.
5. The overheat protection system of the injection molding machine according to claim 4, wherein the overheat protection module acquires a plurality of pieces of regulation information on the injection molding pipe (1), the plurality of pieces of regulation information comprise a piece of high-temperature early warning regulation information, and basic information in the injection molding process is detected;
the basic information comprises pressure data in an injection molding pipe (1) during injection molding and viscosity data of materials during injection molding.
6. The overheat protection system of the injection molding machine of claim 5, wherein the basic information is detected by the following processing means:
s1: the difference between the average temperature of the injection molding pipe (1) and the temperature of the pouring opening of the injection mold, into which the raw material enters, is marked as Ci;
the material viscosity data during injection molding is the average value of the quotient of the pressure data in the injection molding pipe (1) and the raw material mixing temperature marked as Ai;
s2: calculation by formula
Obtaining the material heating coefficient Yi, wherein b 1 And b 2 Are all preset proportional coefficients, and b 1 ＞0,b 2 > 0, epsilon is a correction factor, epsilon=2.14;
s3: if the material heating coefficient Yi is more than or equal to the material change coefficient threshold, judging that the material is heated abnormally, and generating an overheat protection signal;
if the material heating coefficient Yi is smaller than the material change coefficient threshold, the material is judged to be heated normally, a maintenance signal is generated, and the cooling component (4) is kept in a state.
7. An overheat protection system for an injection molding machine according to claim 6, wherein,
after receiving the overheat protection signal, the PLC controller regulates and controls the cooling component (4) as follows:
s1: after receiving the overheat protection signal, the PLC controller opens a communication valve (43) communicated with the water flow channel (41) and injects cooling water into the water flow channel (41) so as to flow into the water storage cavity (42), and at the moment, the cooling water absorbs heat on the surface of the injection molding pipe (1);
s2: after receiving the overheat protection signal again, the PLC opens the two communication valves (43), then discharges the cooling water in the water flow channel (41) and the water storage cavity (42), and re-injects the cooling water into the water flow channel (41) and the water storage cavity (42).
8. The overheat protection system of an injection molding machine according to claim 6, wherein the PLC controller receives the maintenance signal while both communication valves (43) are in a closed state and remain unchanged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117392.9A CN116100772B (en) | 2023-02-15 | 2023-02-15 | Overheat protection method and overheat protection system for injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117392.9A CN116100772B (en) | 2023-02-15 | 2023-02-15 | Overheat protection method and overheat protection system for injection molding machine |
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| CN116100772A true CN116100772A (en) | 2023-05-12 |
| CN116100772B CN116100772B (en) | 2023-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117207470A (en) * | 2023-10-09 | 2023-12-12 | 武汉瑞之源塑业有限公司 | Servo control method and system based on Internet of things |
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| JPH01171830A (en) * | 1987-12-28 | 1989-07-06 | Japan Steel Works Ltd:The | Material feed control method for injection machine and its device |
| CN114734603A (en) * | 2022-03-21 | 2022-07-12 | 浙江凯华模具有限公司 | Temperature control system and method for injection molding machine and mold |
| CN115592915A (en) * | 2022-10-12 | 2023-01-13 | 广东格林精密部件股份有限公司（Cn） | Injection molding machine operating data monitoring and early warning system |
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| JPH01171830A (en) * | 1987-12-28 | 1989-07-06 | Japan Steel Works Ltd:The | Material feed control method for injection machine and its device |
| CN114734603A (en) * | 2022-03-21 | 2022-07-12 | 浙江凯华模具有限公司 | Temperature control system and method for injection molding machine and mold |
| CN115592915A (en) * | 2022-10-12 | 2023-01-13 | 广东格林精密部件股份有限公司（Cn） | Injection molding machine operating data monitoring and early warning system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117207470A (en) * | 2023-10-09 | 2023-12-12 | 武汉瑞之源塑业有限公司 | Servo control method and system based on Internet of things |
| CN117207470B (en) * | 2023-10-09 | 2024-03-05 | 武汉瑞之源塑业有限公司 | Servo control method and system based on Internet of things |
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