CN114347345A - Pulse type thermoplastic composite material product forming device and using method thereof - Google Patents
Pulse type thermoplastic composite material product forming device and using method thereof Download PDFInfo
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- CN114347345A CN114347345A CN202210038335.7A CN202210038335A CN114347345A CN 114347345 A CN114347345 A CN 114347345A CN 202210038335 A CN202210038335 A CN 202210038335A CN 114347345 A CN114347345 A CN 114347345A
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Abstract
A pulse type thermoplastic composite material product forming device and a using method thereof comprise a mould shell, wherein the mould shell is arranged in a surrounding manner, so that a cavity for containing a composite material is formed in the middle of the mould shell, a plurality of heating bodies and a temperature measuring part are arranged on the mould shell, and the temperature measuring part comprises a main temperature measuring probe matched with the heating bodies and an auxiliary temperature measuring probe for measuring the temperature of a mould; the main temperature measuring probe is used for measuring the central temperature, the auxiliary temperature measuring probe is used for measuring the edge temperature, and the edge temperature and the plurality of heating bodies are in incidence relation; the heating device also comprises a control device, and the control device realizes the stabilization of the central temperature and the edge temperature through the control of the heating body. This application adopts main temperature probe to measure the heat-generating body temperature, and supplementary temperature probe measures the mode that the marginal temperature comes the representation product temperature, has better control ability to the inside temperature of forming device to obtain more optimized temperature distribution and intensification, heat preservation effect.
Description
Technical Field
The application relates to a pulse type thermoplastic composite material product forming device and a using method thereof.
Background
In the field of composite materials, compression molding (also called compression molding or compression molding) is an operation of placing a resin and a fabric in powder, granule or fiber form into a mold cavity at a molding temperature, and then closing the mold and pressing to mold and solidify the resin and the fabric. Compression moulding can be used for both thermoset plastics, thermoplastics and rubber materials. In the field of composite article preparation, compression molding is the most common method of preparation, but its drawbacks are also apparent, namely: low molding efficiency and poor product performance consistency. The main reasons for these disadvantages are: firstly, the heating rate of the die is low, the energy loss is large, and the energy utilization rate is low; secondly, the temperature of the die is not uniform enough, the temperature difference between the heating body area and the non-heating body area is too large, and the temperature stability of the die cannot be well controlled.
The existing compression molding process equipment generally adopts an electric heating rod for heating, a single-point or few temperature measuring point sampling mode is adopted to replace the monitoring of the temperature of the whole mold, and in the heating process, because the heating area of the electric heating rod is limited, the heat is finally distributed by the self heat conductivity of the metal material of the mold, so that the integral temperature of the mold is not uniform, a high temperature point and a low temperature point exist on the surface of the same mold inevitably, and the temperature difference between the high temperature point and the low temperature point is large. Similarly, in the constant temperature process, due to the heating/cooling inertia of the electrical bar and the temperature conduction inertia of the metal plate of the mold, it is difficult to control the temperature of the mold within a certain effective range, and the composite material product is often sensitive to the molding temperature, which causes the contradiction between the molding process equipment and the composite material process. How to realize the rapid heating of the mould pressing mould to improve the efficiency and stably and efficiently control the uniformity and the precision of the temperature to improve the performance of the product becomes a difficult problem which needs to be solved urgently by the mould pressing forming process.
Disclosure of Invention
In order to solve the problems, the application provides an impulse type thermoplastic composite material product forming device on one hand, which comprises a mould shell, wherein the mould shell is arranged in a surrounding manner so that a cavity for containing a composite material is formed in the middle of the mould shell, a plurality of heating bodies and a temperature measuring part are arranged on the mould shell, and the temperature measuring part comprises a main temperature measuring probe matched with the heating bodies and an auxiliary temperature measuring probe for measuring the temperature of the mould; the main temperature measuring probe is used for measuring the central temperature, the auxiliary temperature measuring probe is used for measuring the edge temperature, and the edge temperature and the plurality of heating bodies are in incidence relation; the heating device also comprises a control device, and the control device realizes the stabilization of the central temperature and the edge temperature through the control of the heating body. This application adopts main temperature probe to measure the heat-generating body temperature, and supplementary temperature probe measures the mode that the marginal temperature comes the representation product temperature for can have better control ability to the inside temperature of forming device, thereby obtain more optimized temperature distribution and intensification, heat preservation effect.
Preferably, the control device comprises a power management device for managing heating power of the heating element and a controller for acquiring temperatures of the main temperature measurement probe and the auxiliary temperature measurement probe and sending a control strategy to the power management device by combining the association relationship.
Preferably, the mold housing includes an upper cover body, an annular protection plate disposed below the upper cover body, and a lower cover body disposed below the annular protection plate.
Preferably, the upper cover body comprises a measuring plate and a heating plate which are arranged separately; a plurality of heating cavities are arranged in the heating plate, the heating body is arranged in the heating cavities, a main temperature measuring probe is arranged on the measuring plate at a position opposite to the heating cavities, an auxiliary temperature measuring probe is arranged at the edge of the measuring plate and is arranged between the adjacent heating cavities; the lower cover body and the upper cover body are symmetrically arranged. This application is when guaranteeing main temperature probe and supplementary temperature probe functionality, still guarantees its self easy assembly nature through the design of structure, avoids needing too high assembly precision to the realization reaches the temperature control effect of optimizing more through setting up in the overall arrangement under low-cost prerequisite.
Preferably, an auxiliary temperature probe is also provided between the corner of the measurement plate and the heating element.
Preferably, the mold shell is a flat heating mold or a regular and irregular mold with other shapes or a three-dimensional surrounding three-dimensional mold;
the heating body adopts an electric energy heating mode, and the heating capacity is regulated and controlled by voltage current; the heating body is a ceramic heating plate or a heating rod or an infrared heating tile or a pulse heating body;
the temperature measuring part is a thermocouple probe, a thermal resistance probe or an infrared temperature measuring probe.
Preferably, the power management device is an intensive multi-path self-adjusting power supply, receives the control management of the control device, realizes intensive control on the heating element, and realizes heating and temperature control processes according to real-time temperature of the heating element and temperature feedback of the peripheral temperature measuring part;
the control device is a computer or an embedded control system and has the functions of temperature and other data acquisition, control, algorithm execution and data storage.
Preferably, the temperature measuring part further comprises a temperature measuring concentrator, the temperature measuring concentrator is a multi-channel concentrator, the maximum temperature measuring concentrator supports 32 channels and has a communication function, and temperature data of all accessed channels can be sent to the control device in a communication mode.
In another aspect, the application also discloses a method for using the impulse type thermoplastic composite material product forming device, which comprises the following steps: placing the composite material in a forming device;
the forming device is heated and divided into a temperature rising section and a constant temperature section,
the temperature rising section adopts multi-gradient high-pressure-change rapid heating;
the constant temperature section is insulated in a way of coarse adjustment through small variable voltage and fine adjustment through supplement of constant voltage and pulsating current.
Preferably, the temperature raising section comprises the following steps: the control system acquires an initial temperature and a stop temperature, and realizes rapid temperature rise through variable voltage pulse heating by using the power management device, wherein the rapid temperature rise is arranged in a temperature gradient manner, the heating elements can rapidly heat respective responsible regions, the temperature gradient ensures the conduction of heat of the die, the voltage of the heating elements is fed back and adjusted according to the preset PID control depth under different temperature rise gradients, and the rapid temperature rise of the die is realized through variable voltage;
the constant temperature section comprises the following steps: the power supply management device realizes dynamic balance of heat dissipation and supplement under temperature maintenance through current pulse type heating and temperature supplement under constant voltage, in order to maintain the temperature uniformity of the die, when a control system monitors that local temperature is higher or lower, the control system sends an instruction to the power supply management device, the power supply management device coordinates peripheral heating bodies to calculate pulse time and voltage of each heating body through equivalent threshold value transformation, and the peripheral temperature is stabilized and heat of an abnormal temperature area is supplemented or reduced under the coordination of a plurality of heating bodies, so that the temperature uniformity is realized. According to the method, the temperature of the die is quickly and effectively raised by using a variable-pressure pulse heating mode of the temperature raising section, and the problem of low temperature raising rate of the die is solved; the constant temperature section adopts a mode of voltage regulation rough adjustment and constant voltage pulsating current fine adjustment to save energy and supplement temperature, overcomes the problems of temperature overshoot and over-drop of the die and realizes energy conservation and emission reduction to the maximum extent; by reasonably planning the space area of the die, densely distributing heating bodies, realizing intensive multi-channel independent control of a power supply, and partitioning pixel blocks to realize fine adjustment control of local temperature of the die; and the PID temperature control is guided by the depth negative feedback based on the temperature of the heating body and the temperature of the die to realize the high stability of the temperature of the die.
This application can bring following beneficial effect:
1. the method adopts the main temperature measuring probe to measure the temperature of the heating body and the auxiliary temperature measuring probe to measure the edge temperature to represent the temperature of the product, so that the method has better control capability on the temperature in the forming device, and further obtains more optimized temperature distribution and heating and heat preservation effects;
2. the temperature control device has the advantages that while the functionality of the main temperature measuring probe and the auxiliary temperature measuring probe is guaranteed, the self-assembly easiness is guaranteed through the structural design, the requirement for overhigh assembly precision is avoided, and therefore under the premise of low cost, a more optimized temperature control effect is achieved through arrangement on the layout;
3. according to the method, the temperature of the die is quickly and effectively raised by using a variable voltage pulse heating mode of the temperature raising section, and the problem of low temperature raising rate of the die is solved; the constant temperature section adopts a mode of voltage regulation rough adjustment and constant voltage pulsating current fine adjustment to save energy and supplement temperature, overcomes the problems of temperature overshoot and over-drop of the die and realizes energy conservation and emission reduction to the maximum extent; by reasonably planning the space area of the die, densely distributing heating bodies, realizing intensive multi-channel independent control of a power supply, and partitioning pixel blocks to realize fine adjustment control of local temperature of the die; and the PID temperature control is guided by the depth negative feedback based on the temperature of the heating body and the temperature of the die to realize the high stability of the temperature of the die.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a schematic view of a layout of a temperature probe with a middle auxiliary temperature probe;
fig. 3 is a side view schematic of the present application.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present application will be explained in detail through the following embodiments.
In a first embodiment, as shown in fig. 1-3, an impulse type thermoplastic composite material product forming device comprises a mold shell 1, wherein the mold shell 1 is arranged around so that a cavity 2 for containing a composite material is formed in the middle part, a plurality of heating elements 3 and a temperature measuring part are arranged on the mold shell 1, and the temperature measuring part comprises a main temperature measuring probe 4 matched with the heating elements 3 and an auxiliary temperature measuring probe 5 for measuring the temperature of a mold; the main temperature measuring probe 4 is used for measuring the central temperature, the auxiliary temperature measuring probe 5 is used for measuring the edge temperature, and the edge temperature and the plurality of heating elements 3 are in a correlation relationship; the correlation relationship here means that the edge temperature is similar to the position of the cavity 2, so that the temperature of the cavity 2 can be represented, after a certain calibration test or measurement test is performed, the temperature inside the cavity 2, namely the temperature of the thermoplastic composite material, can be directly estimated through the edge temperature, so that production is guided on the basis, and of course, a part of probes can be directly arranged inside the cavity 2 to more accurately know the internal temperature, and experiments show that the mode of laterally arranging the auxiliary temperature probe and the main temperature probe 4 can meet the precision of production control and reduce the thermal hysteresis of temperature measurement. And a control device for stabilizing the center temperature and the edge temperature by controlling the heating body 3. The control device comprises a power supply management device for managing the heating power of the heating body 3 and a controller for acquiring the temperatures of the main temperature measuring probe 4 and the auxiliary temperature measuring probe 5 and sending a control strategy to the power supply management device by combining the association relation. The mold housing 1 includes an upper cover 6, an annular protection plate 7 disposed below the upper cover 6, and a lower cover 8 disposed below the annular protection plate 7. The upper cover body 6 comprises a measuring plate 9 and a heating plate 11 which are arranged separately; the heating plate 11 is internally provided with a plurality of heating cavities 10, the heating body 3 is arranged in the heating cavities 10, the main temperature measuring probe 4 is arranged on the measuring plate 9 at a position opposite to the heating cavities 10, the edge of the measuring plate 9 is provided with the auxiliary temperature measuring probe 5, and the auxiliary temperature measuring probe 5 is arranged between the adjacent heating cavities 10. An auxiliary temperature probe 5 is also provided between the corner of the measurement plate 9 and the heating element.
Of course, the shape of the mold housing 1 is not limited in this application, and may be a flat heating mold or a regular and irregular mold of other shapes or a three-dimensional surrounding three-dimensional mold; the heating body 3 adopts an electric energy heating mode, and the heating capacity is regulated and controlled by voltage current; the heating body 3 is a ceramic heating plate or a heating rod or an infrared heating tile or a pulse heating body 3; the temperature measuring part is a thermocouple probe, a thermal resistance probe or an infrared temperature measuring probe.
In addition, the lower cover body 8 and the upper cover body 6 can be symmetrically arranged to improve the uniformity of temperature and the effectiveness of temperature rise and constant temperature.
The power management device is an intensive multi-path self-adjusting power supply, receives the control management of the control device, realizes intensive control on the heating element 3, and realizes heating and temperature control processes according to the real-time temperature of the heating element 3 and temperature feedback of the peripheral temperature measuring part; the control device is a computer or an embedded control system, and has the functions of temperature and other data acquisition, control, algorithm execution and data storage, and can be a controller with control functions, such as computer and computer software, a PLC industrial control system, an embedded control system, an FPGA and the like.
The temperature measuring part also comprises a temperature measuring collector which is a multi-channel collector, supports 32 channels to the maximum and has a communication function, and can send the temperature data of all the accessed channels to the control device in a communication mode.
When in use, the method comprises the following steps:
placing a thermoplastic composite material in a forming device;
the forming device is heated and divided into a temperature rising section and a constant temperature section,
the temperature rising section adopts multi-gradient high-pressure-change rapid heating;
the constant temperature section is insulated in a mode of coarse adjustment through small variable voltage and fine adjustment through supplement of constant voltage pulsating current.
The temperature rising section comprises the following steps: the control system obtains the starting temperature and the stopping temperature, the rapid temperature rise of variable voltage pulse heating is realized by using the power management device, the rapid temperature rise is arranged in a temperature gradient manner, the heating elements 3 can rapidly heat respective responsible areas, the temperature gradient ensures the conduction of the heat of the die, the voltage of the heating elements 3 is fed back and adjusted according to the preset PID control depth under different temperature rise gradients, and the rapid temperature rise of the die is realized through voltage transformation; the voltage regulation range is 24V-240V, and the pulse frequency is 0.05Hz-1 KHz;
the constant temperature section comprises the following steps: the power supply management device realizes dynamic balance of heat dissipation and supplement under temperature maintenance through current pulse type heating and temperature supplement under constant voltage, in order to maintain the temperature uniformity of the die, when the control system monitors that the local temperature is higher or lower, the control system sends an instruction to the power supply management device, the power supply management device coordinates the peripheral heating bodies to calculate the pulse time and the voltage of each heating body 3 through equivalent threshold value transformation, the peripheral temperature is stabilized under the coordination of a plurality of heating bodies 3, and the heat of an abnormal temperature area is supplemented or reduced, so that the temperature uniformity is realized.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An impulse type thermoplastic composite material product forming device is characterized in that: the composite material temperature measuring device comprises a mould shell, wherein the mould shell is arranged in a surrounding manner, so that a cavity for containing a composite material is formed in the middle of the mould shell, a plurality of heating bodies and a temperature measuring part are arranged on the mould shell, and the temperature measuring part comprises a main temperature measuring probe matched with the heating bodies and an auxiliary temperature measuring probe for measuring the temperature of the mould; the main temperature measuring probe is used for measuring the central temperature, the auxiliary temperature measuring probe is used for measuring the edge temperature, and the edge temperature and the plurality of heating bodies are in incidence relation; the heating device also comprises a control device, and the control device realizes the stabilization of the central temperature and the edge temperature through the control of the heating body.
2. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 1, wherein: the control device comprises a power supply management device for managing the heating power of the heating body and a controller for acquiring the temperatures of the main temperature measuring probe and the auxiliary temperature measuring probe and sending a control strategy to the power supply management device by combining the association relation.
3. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 1, wherein: the mould shell comprises an upper cover body, an annular protection plate arranged below the upper cover body and a lower cover body arranged below the annular protection plate.
4. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 3, wherein: the upper cover body comprises a measuring plate and a heating plate which are arranged separately; a plurality of heating cavities are arranged in the heating plate, the heating body is arranged in the heating cavities, a main temperature measuring probe is arranged on the measuring plate at a position opposite to the heating cavities, an auxiliary temperature measuring probe is arranged at the edge of the measuring plate and is arranged between the adjacent heating cavities; the lower cover body and the upper cover body are symmetrically arranged.
5. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 4, wherein: an auxiliary temperature measuring probe is also arranged between the corner of the measuring plate and the heating body.
6. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 2, wherein: the mould shell is a flat heating mould or a regular and irregular mould with other shapes or a three-dimensional surrounding three-dimensional mould;
the heating body adopts an electric energy heating mode, and the heating capacity is regulated and controlled by voltage current; the heating body is a ceramic heating plate or a heating rod or an infrared heating tile or a pulse heating body;
the temperature measuring part is a thermocouple probe, a thermal resistance probe or an infrared temperature measuring probe.
7. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 6, wherein: the power supply management device is an intensive multi-path self-adjusting power supply, receives the control management of the control device, realizes intensive control on the heating element, and realizes heating and temperature control processes according to the real-time temperature of the heating element and temperature feedback of the peripheral temperature measurement part;
the control device is a computer or an embedded control system and has the functions of temperature and other data acquisition, control, algorithm execution and data storage.
8. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 7, wherein: the temperature measuring part also comprises a temperature measuring collector which is a multi-channel collector, supports 32 channels to the maximum and has a communication function, and can send the temperature data of all the accessed channels to the control device in a communication mode.
9. A method of using the impulse type thermoplastic composite article forming apparatus of claim 1, wherein: the method comprises the following steps:
placing the composite material in a forming device;
the forming device is heated and divided into a temperature rising section and a constant temperature section,
the temperature rising section adopts multi-gradient high-pressure-change rapid heating;
the constant temperature section is insulated in a mode of coarse adjustment through small variable voltage and fine adjustment through supplement of constant voltage pulsating current.
10. The impulse type thermoplastic composite material product forming apparatus as claimed in claim 9, wherein: the temperature rising section comprises the following steps: the control system acquires an initial temperature and a stop temperature, and realizes rapid temperature rise through variable voltage pulse heating by using the power management device, wherein the rapid temperature rise is arranged in a temperature gradient manner, the heating elements can rapidly heat respective responsible regions, the temperature gradient ensures the conduction of heat of the die, the voltage of the heating elements is fed back and adjusted according to the preset PID control depth under different temperature rise gradients, and the rapid temperature rise of the die is realized through variable voltage;
the constant temperature section comprises the following steps: the power supply management device realizes dynamic balance of heat dissipation and supplement under temperature maintenance through current pulse type heating and temperature supplement under constant voltage, in order to maintain the temperature uniformity of the die, when a control system monitors that local temperature is higher or lower, the control system sends an instruction to the power supply management device, the power supply management device coordinates peripheral heating bodies to calculate pulse time and voltage of each heating body through equivalent threshold value transformation, and the peripheral temperature is stabilized and heat of an abnormal temperature area is supplemented or reduced under the coordination of a plurality of heating bodies, so that the temperature uniformity is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210038335.7A CN114347345B (en) | 2022-01-13 | 2022-01-13 | Pulse type thermoplastic composite material product forming device and application method thereof |
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| CN202210038335.7A CN114347345B (en) | 2022-01-13 | 2022-01-13 | Pulse type thermoplastic composite material product forming device and application method thereof |
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| CN114347345B CN114347345B (en) | 2024-03-26 |
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| CN217670658U (en) * | 2022-01-13 | 2022-10-28 | 山东明科电气技术有限公司 | Pulse type thermoplastic composite material product forming die |
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2022
- 2022-01-13 CN CN202210038335.7A patent/CN114347345B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050270360A1 (en) * | 2004-06-03 | 2005-12-08 | Frank Reisinger | Arrangement and method for activation of a thermotransfer print head |
| CN105499569A (en) * | 2015-12-24 | 2016-04-20 | 华中科技大学 | Active temperature field regulating and controlling system for manufacturing high-energy beam reinforced material and control method for active temperature field regulating and controlling system |
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| CN114347345B (en) | 2024-03-26 |
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