Heat preservation system of annealing box

Abstract

The utility model is suitable for the technical field of heat treatment equipment, and provides an annealing box heat preservation system which comprises a heat preservation box, an air supply pipe connected with the heat preservation box, an electric heating generator connected with the air supply pipe, an air blower arranged on the electric heating generator and an overtemperature protection device connected with the front end of the electric heating generator. The overtemperature protection device comprises a temperature sensor module for detecting the temperature of an air outlet of the electric heating generator and a central control module; a to-be-annealed product subjected to injection molding is placed in the heat preservation box, a heating pipe used for heating air is arranged in the electric heating generator, and the air blower is used for pumping the air from an air inlet of the electric heating generator to the heating pipe to be subjected to heat exchange to form hot air which is pumped out from an air outlet of the electric heating generator to the air supply pipe. The central control module is used for adjusting the temperature of the electric heating generator and adjusting the air volume of the air blower according to the temperature detected by the temperature sensor module. The annealing box solves the problem that the temperature distribution in the existing annealing box is not uniform and the accurate control is difficult.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment equipment, in particular to an annealing box insulation system. Background Art

[0002] During the injection molding process, the molten plastic material is injected into the mold through the injection molding machine, and after cooling and solidification, the final product is formed. In the traditional method, the injection molded product is usually directly exposed to the room temperature environment for natural cooling after demolding. Due to the large temperature difference between the internal and external environment of the product, the heat conduction speed is inconsistent, resulting in the inability to release the internal thermal stress of the product uniformly, thus forming internal stress. In addition, the temperature gradient is large during the natural cooling process, which further aggravates the internal stress problem of the product, and may eventually cause product deformation or mechanical performance degradation.

[0003] In order to solve this problem, annealing is often used in the prior art to eliminate the internal stress of injection molded products. Annealing can effectively reduce the temperature gradient and evenly release the internal stress of the product through slow heating and gradual cooling, thereby improving the mechanical properties and dimensional stability of the product. At present, annealing is mainly carried out in two ways:

[0004] Oven: Ovens provide more precise temperature control and can gradually heat and cool products through preset temperature programs to achieve ideal annealing effects. However, ovens have high equipment costs and energy consumption, which significantly increases operating costs, especially when a large number of injection molded products need to be processed. In addition, the high temperature environment of the oven may cause thermal degradation of certain plastic materials, further limiting its application range.

[0005] Annealing box: Annealing box is a closed device. The product is placed in the box and slowly cooled by controlling the temperature of the box. However, annealing boxes often have the problem of low temperature control accuracy. The temperature in the box cannot be accurately controlled. Different areas in the box may have temperature gradients due to the layout of heating elements and differences in material heat conduction, which increases the difficulty of local temperature control and makes it difficult to evenly distribute the temperature in the box, resulting in unsatisfactory annealing effects and failure to ensure complete release of product internal stress. In addition, annealing boxes are large in size, high in energy consumption, and high in operation and maintenance costs.

[0006] Although these methods can improve product quality to a certain extent, they all have their own shortcomings and it is difficult to strike a balance between cost and performance. In order to improve the quality of injection molded products and reduce production costs, a new annealing technology is urgently needed that can more accurately control the temperature change during the annealing process, improve the annealing effect, and effectively eliminate internal stress to ensure the dimensional stability and mechanical properties of the product. Utility Model Content

[0007] Based on this, the purpose of the utility model is to provide an annealing box insulation system to fundamentally solve the problem that the temperature distribution in the existing annealing box is uneven and difficult to accurately control.

[0008] According to an annealing box insulation system of an embodiment of the utility model, the system includes an insulation box, an air supply pipe connected to the insulation box, an electric heat generator connected to the air supply pipe, a blower arranged on the electric heat generator, and an over-temperature protection device connected to the front end of the electric heat generator, the over-temperature protection device includes a temperature sensor module for detecting the temperature of the air outlet of the electric heat generator, and a central control module electrically connected to the electric heat generator, the blower and the temperature sensor module respectively;

[0009] The products to be annealed after injection molding are placed in the thermal insulation box, the electric heat generator is provided with a heating tube for heating air, the blower is used to pump air from the air inlet of the electric heat generator to the heating tube for heat exchange into hot air, and then pumped out from the air outlet of the electric heat generator to the air supply pipe, and the central control module is used to adjust the temperature of the electric heat generator and the air volume of the blower according to the temperature detected by the temperature sensor module.

[0010] In addition, the annealing box insulation system according to the above embodiment of the utility model may also have the following additional technical features:

[0011] Furthermore, the over-temperature protection device further comprises a relay module connected between the central control module and the electric heat generator, and a delay module connected between the relay module and the blower;

[0012] The relay module is used to control the working state of the heating tube in the electric heat generator according to the control signal sent by the central control module;

[0013] The delay module is used to control the blower to continue working for a preset time when the relay module stops working.

[0014] Furthermore, the over-temperature protection device also includes a temperature setting unit, a switch unit and a display;

[0015] The temperature setting unit is connected to the central control module and is used to set the annealing temperature;

[0016] The switch unit is connected to the central control module and is used to control the system switch;

[0017] The display is connected to the temperature sensor module and the temperature setting unit respectively, and is used to display the temperature detected by the temperature sensor module and the annealing temperature set by the temperature setting unit.

[0018] Furthermore, the air outlet and air inlet of the electric heat generator are respectively arranged at the left and right ends of the electric heat generator, the heating pipe is arranged at the air inlet of the electric heat generator, and the blower is arranged at the upper end of the electric heat generator and close to the air outlet of the electric heat generator.

[0019] Furthermore, the heating tube is a U-shaped tube, and the heating tube is transversely arranged inside the electric heat generator in a direction parallel to the air flow direction.

[0020] Furthermore, the insulation box is provided with an air inlet and an air outlet, the air inlet of the insulation box is located on the side of the air outlet of the electric heat generator and close to the air outlet of the electric heat generator, the air outlet of the insulation box is located on the side of the air inlet of the electric heat generator and away from the air inlet of the electric heat generator, and the air inlet of the insulation box is connected to the air supply pipe.

[0021] Furthermore, the system also includes an air duct connected to the air inlet of the electric heat generator and the air outlet of the insulation box respectively.

[0022] Furthermore, there is at least one incubator box, the number of the air supply pipes is the same as the number of the incubator boxes, the air inlet of each incubator box is connected to the corresponding air supply pipe, and each air supply pipe is connected to the air outlet of the electric heat generator.

[0023] Furthermore, the temperature sensor module includes a probe which extends out from one side of the air outlet of the over-temperature protection device corresponding to the electric heat generator and is then installed in the air supply pipe and located at the air outlet of the electric heat generator.

[0024] Furthermore, the system further comprises a first carrier for carrying the over-temperature protection device and the electric heat generator, and a second carrier for carrying the heat preservation box and tilting the heat preservation box;

[0025] The second supporting frame includes a supporting rod disposed at the bottom of the insulation box to support the insulation box, a protective rod disposed at both sides of the insulation box to protect the insulation box, and a resisting rod disposed on the inclined bottom surface of the insulation box to resist the sliding of the insulation box.

[0026] The annealing box insulation system provided by the embodiment of the utility model monitors the temperature of the air outlet of the electric heat generator in real time through the temperature sensor module, and the central control module makes instant adjustments to the temperature of the electric heat generator and the air volume of the blower according to the temperature change, thereby ensuring that the temperature of the hot air output by the system is stable, avoiding temperature fluctuations, and ensuring accurate control of the temperature in the annealing box. The insulation box is connected with the air supply pipe so that hot air with consistent temperature is continuously received, so that the hot air is evenly distributed in the insulation box, avoiding local overheating or uneven temperature in the insulation box, improving the annealing effect and product quality, and solving the problem that the temperature distribution in the existing annealing box is uneven and difficult to accurately control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the annealing box insulation system in the first embodiment of the utility model at a first viewing angle;

[0028] Figure 2 It is a partial structural schematic diagram of the annealing box insulation system in the first embodiment of the utility model;

[0029] Figure 3 It is a partial cross-sectional structural diagram of the annealing box insulation system in the first embodiment of the utility model;

[0030] Figure 4 It is a cross-sectional structural diagram of the over-temperature protection device of the annealing box insulation system in the first embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of the annealing box insulation system in the first embodiment of the utility model at a second viewing angle;

[0032] Figure 6 It is a structural schematic diagram of the annealing box insulation system in the first embodiment of the utility model at a third viewing angle;

[0033] Figure 7 It is a structural schematic diagram of the first carrier and the second carrier in the annealing box insulation system in the first embodiment of the utility model;

[0034] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] Embodiment 1

[0039] See also Figure 1-Figure 7 , shown is an annealing box insulation system in the first embodiment of the utility model. For the convenience of explanation, only the parts related to the embodiment of the utility model are shown. The annealing box insulation system provided by the embodiment of the utility model includes an insulation box 10, an air supply pipe 20 connected to the insulation box 10, an electric heat generator 30 connected to the air supply pipe 20, a blower 40 arranged on the electric heat generator 30, and an over-temperature protection device 50 connected to the front end of the electric heat generator 30. The over-temperature protection device 50 includes a temperature sensor module 51 for detecting the temperature of the air outlet of the electric heat generator 30, and a central control module 52 electrically connected to the electric heat generator 30, the blower 40 and the temperature sensor module 51 respectively;

[0040] The injection molded product to be annealed is placed in the insulation box 10, the electric heat generator 30 is provided with a heating pipe 31 for heating air, the blower 40 is used to pump air from the air inlet of the electric heat generator 30 to the heating pipe 31, and then the air is pumped out from the air outlet of the electric heat generator 30 to the air supply pipe 20 after heat exchange into hot air, and the central control module 52 is used to adjust the temperature of the electric heat generator 30 and the air volume of the blower 40 according to the temperature detected by the temperature sensor module 51.

[0041] Among them, in one embodiment of the utility model, the heat preservation box 10 is used to perform annealing treatment on the injection molded products placed therein, wherein the heat preservation box 10 is provided with an air inlet 11 and an air outlet 12, the air inlet 11 of the heat preservation box 10 is located on the side of the air outlet of the electric heat generator 30 and close to the air outlet of the electric heat generator 30, the air outlet 12 of the heat preservation box 10 is located on the side of the air inlet of the electric heat generator 30 and away from the air inlet of the electric heat generator 30, and the air inlet 11 of the heat preservation box 10 is connected to the air supply pipe 20. At this time, the air inlet 11 of the heat preservation box 10 is connected to the air outlet of the electric heat generator 30 through the air supply pipe 20, and the air inlet 11 and the air outlet 12 of the heat preservation box 10 are at diagonal positions, refer to Figure 5 and Figure 6 As shown, the insulation box 10 can accommodate the injection molded products to be annealed. At this time, the insulation box 10 receives the hot air delivered by the air supply pipe 20 to anneal the injection molded products placed in the insulation box 10, thereby eliminating internal stress and improving product quality. Further, the air inlet 11 of the insulation box 10 is close to the air outlet of the electric heat generator 30, so that the hot air heated by the electric heat generator 30 can be directly received, which reduces the heat loss of the hot air during the transportation process and improves the utilization rate of thermal energy. After the hot air enters the insulation box 10 from the air outlet of the electric heat generator 30, it can flow evenly throughout the insulation box 10 and then be discharged from the air outlet 12 away from the air inlet of the electric heat generator 30. This airflow path can ensure that the temperature distribution inside the entire insulation box 10 is uniform, avoiding local overheating or uneven temperature. At this time, the hot air is fully mixed with the air in the insulation box 10 during the flow in the insulation box 10, which promotes the uniform distribution of heat and improves the insulation effect. Therefore, through the reasonable layout of the air inlet 11 and the air outlet 12, it is possible to ensure that the hot air in the insulation box 10 flows smoothly, avoiding the accumulation of hot air in a certain place and causing overheating. Through the reasonable circulation path of the hot air, the system can more effectively control the temperature, avoid excessive temperature fluctuations, and improve safety and stability.

[0042] Furthermore, in one embodiment of the utility model, one end of the air supply pipe 20 is connected to the air outlet of the electric heat generator 30, and the other end is connected to the air inlet 11 of the heat preservation box 10. The air supply pipe 20 is used to transfer hot air from the electric heat generator 30 to the heat preservation box 10, so as to anneal the injection molded products in the heat preservation box 10. The outer layer of the air supply pipe 20 adopts an insulating layer with a low thermal conductivity coefficient, so as to reduce the heat loss of the hot air in the air supply pipe 20 as much as possible, so as to make the hot air from the air outlet of the electric heat generator 30 through the air supply pipe 20 to the heat preservation box 10, the temperature of the hot air is roughly maintained unchanged, so that the temperature at the air inlet 11 of the heat preservation box 10 can be roughly determined according to the air outlet temperature of the electric heat generator 30.

[0043] Further, in one embodiment of the present invention, the front end of the electric heat generator 30 is connected and fitted with the over-temperature protection device 50, and the air outlet and air inlet of the electric heat generator 30 are respectively arranged at the left and right ends of the electric heat generator 30. A heating pipe 31 is arranged in the electric heat generator 30 for heating the incoming air. At this time, after the air passes through the heating pipe 31, hot air is formed and discharged from the air outlet and enters the air supply pipe 20. Figure 3 As shown, the heating tube 31 is a U-shaped tube, and the heating tube 31 is arranged horizontally inside the electric heat generator 30 in a U-shaped tortuosity, so that the heating path can be extended as much as possible. At the same time, the heating tube 31 is arranged in a direction parallel to the air flow direction, so that the air can contact the heating tube 31 to the greatest extent when flowing through, thereby improving the heating efficiency. At the same time, both ends of the heating tube 31 are connected to the power supply through the electric heat generator 30 to form a complete heating circuit, providing a stable heat source, and the heating tube 31 is arranged at the air inlet of the electric heat generator 30, so that the air pumped into the air inlet can be directly heated faster and more efficiently. At the same time, since the heating tube 31 adopts a U-shaped tube, the arrangement is compact, and a longer heating path can be provided in a limited space to ensure full utilization of heat. At the same time, the U-shaped tube can provide a larger surface area for heat exchange in a limited space, thereby improving thermal efficiency, and the curved structure makes the heat transfer more uniform in a smaller space, making the heating area more concentrated and uniform, ensuring that the air can fully absorb heat when flowing through, avoiding local overheating or overcooling. Therefore, the U-shape design of the heating tube 31 not only effectively utilizes space and improves thermal efficiency, but also ensures the uniformity and safety of the heating process, so that the hot air heated by the heating tube 31 can be transmitted to the air outlet with uniform temperature.

[0044] Furthermore, in one embodiment of the utility model, the blower 40 is arranged at the upper end of the electric heat generator 30 and close to the air outlet of the electric heat generator 30, wherein the blower 40 pumps air into the equipment through the air inlet of the electric heat generator 30, and the air becomes hot air after being heated by the heating pipe 31, and enters the air supply pipe 20 through the air outlet. At the same time, the blower 40 is arranged at a position close to the air outlet of the electric heat generator 30, so as to accelerate the flow of air, reduce the resistance of air flow in the pipeline, and thus improve the flow efficiency of the system. At the same time, the heated air can be quickly discharged from the equipment, reducing the residence time of heat inside the equipment, reducing heat loss, and improving heating efficiency.

[0045] Furthermore, in one embodiment of the utility model, the system further includes an air duct (not shown) connected to the air inlet of the electric heat generator 30 and the air outlet 12 of the heat preservation box 10 respectively. At this time, the air inlet of the electric heat generator 30 and the air outlet 12 of the heat preservation box 10 are connected through the air duct to form a closed-loop hot air circulation system. The hot air enters the heat preservation box 10 after being heated by the electric heat generator 30, and then returns to the electric heat generator 30 through the air duct to continue heating, thereby reducing heat loss and maximizing the use of heat energy. At the same time, by recycling the hot air, the introduction of external air is reduced, and the energy consumption of system heating is reduced, thereby saving energy and improving the overall efficiency of the equipment. At the same time, since the hot air circulates back to the electric heat generator 30 through the air duct, the temperature fluctuation is reduced, making the temperature in the heat preservation box 10 more stable, which helps to accurately control the temperature in the box. At the same time, the hot air circulated back through the air duct already has a certain temperature, so only a small amount of heating is required to reach the required high temperature, thereby improving the heating efficiency. At the same time, the provision of an air duct can reduce eddy currents and resistance in air flow, allowing air to flow smoothly between the electric heat generator 30 and the heat preservation box 10, thereby improving the air flow efficiency of the entire system.

[0046] Further, in one embodiment of the present invention, there is at least one incubator 10, the number of air supply pipes 20 is the same as the number of incubators 10, the air inlet 11 of each incubator 10 is connected to the corresponding air supply pipe 20, and each air supply pipe 20 is connected to the air outlet of the electric heat generator 30. Figure 5 and Figure 6 As shown, the number of the incubator 10 is two, wherein Figure 5 and Figure 6In the figure, only one of the incubators 10 is connected to the air supply pipe 20, but the connection between the other incubator 10 and the other air supply pipe 20 is not indicated. It is understandable that the connection between each air supply pipe 20 and the air outlet of the electric heat generator 30 can be realized by setting a three-way (or multi-way) at the air outlet of the electric heat generator 30, or the air outlet corresponding to the number of incubators 10 can be directly set in the electric heat generator 30. At this time, each air outlet is independently connected to an air supply pipe 20, so the implementation method of connecting each air supply pipe 20 to the air outlet of the electric heat generator 30 is not limited here, and the number of incubators 10 is not specifically limited here, and it is set according to actual use requirements. At this time, multiple incubators 10 are respectively connected to their respective air supply pipes 20, and finally connected to the air outlet of the electric heat generator 30. At this time, the heating of each incubator 10 can be independently controlled to realize zone heating and avoid waste of resources. At the same time, multiple incubators 10 realize modular design, which is convenient for system expansion or adjustment. For example, the number of incubators 10 can be increased or decreased according to demand, so as to flexibly cope with heating tasks of different scales, and facilitate the maintenance or replacement of a single incubator 10 or air supply pipe 20 without affecting the normal operation of other parts. At the same time, each incubator 10 and air supply pipe 20 are independent, and even if a problem occurs in an incubator 10 or air supply pipe 20, it will not affect the normal operation of other incubators 1014, thus ensuring the stability of the system. At the same time, the electric heat generator 30 can be heated centrally, reducing unnecessary heating links, and further improving the energy utilization rate of the system.

[0047] Further, in one embodiment of the present invention, the over-temperature protection device 50 includes a temperature sensor module 51 and a central control module 52. The temperature sensor module 51 is connected to the central control module 52, and the temperature sensor module 51 includes a probe 511 that extends out of the over-temperature protection device 50 corresponding to the air outlet of the electric heat generator 30 and is installed in the air supply pipe 20 and is located at the air outlet of the electric heat generator 30. Specifically, the probe 511 extends out of the over-temperature protection device 50, is installed on the air outlet side of the electric heat generator 30 and is located inside the air supply pipe 20. It should be pointed out that the temperature sensor module 51 usually includes the probe 511, and of course it also includes some other components, such as a variable resistor, an amplifier circuit and a computer control unit. Specifically, in this embodiment, the probe 511 of the temperature sensor module 51 extends out of the over-temperature protection device 50, and the other components of the temperature sensor module 51 are arranged inside the over-temperature protection device 50. Of course, in other embodiments of the present invention, it can also be set according to actual use needs, which is not specifically limited here. The probe 511 installed in the air supply pipe 20 is located at the air outlet of the electric heat generator 30, and can monitor the temperature of the hot air coming out of the electric heat generator 30 in real time. At this time, the central control module 52 can roughly determine the temperature of the insulation box 10 according to the temperature value detected by the probe 511. It should be pointed out that the reason for setting the temperature sensor module 51 to detect the air outlet temperature of the electric heat generator 30 instead of directly detecting the temperature of the insulation box 10 is mainly because the electric heat generator 30 is connected and fit with the over-temperature protection device 50, so that it is convenient to install and maintain the temperature sensor module 51 at a relatively close position, while the insulation box 10 is far away from the over-temperature protection device 50, and the location may be relatively narrow or difficult to access, making the arrangement and installation of the temperature sensor module 51 more difficult. Secondly, the temperature sensor module 51 is set in the air supply pipe 20 to obtain accurate temperature readings, because the air supply pipe 20 is usually the path of air flow, and the temperature change will be relatively uniform and rapid. However, inside the insulation box 10, due to the uneven distribution of heat, the collected temperature may not be accurate enough or the response may not be timely. At this time, the central control module 52 automatically adjusts the heating intensity of the electric heat generator 30 and the air volume of the blower 40 according to the temperature detected by the temperature sensor module 51, so as to maintain the temperature detected by the temperature sensor module 51 unchanged, so as to maintain a constant temperature output, so that the air supply duct 20 can continuously transmit hot air with stable temperature to the insulation box 10, and the hot air transmitted by the air supply duct 20 can ensure that the temperature inside the insulation box 10 is evenly distributed, and the temperature of each area in the insulation box 10 is kept consistent, avoiding local overheating or uneven temperature, so that the temperature in the insulation box 10 can be effectively adjusted and controlled to achieve a uniform temperature distribution.Specifically, the central control module 52 can adopt conventional intelligent control algorithms in the prior art, such as PID control (proportional-integral-differential control), to adjust the working states of the electric heat generator 30 and the blower 40 according to real-time feedback to minimize temperature fluctuations and energy consumption.

[0048] Among them, in one embodiment of the utility model, the over-temperature protection device 50 also includes a temperature setting unit 53, a switch unit 54 and a display 55; the temperature setting unit 53 is connected to the central control module 52 for setting the annealing temperature; the switch unit 54 is connected to the central control module 52 for controlling the system switch; the display 55 is connected to the temperature sensor module 51 and the temperature setting unit 53 respectively, for displaying the temperature detected by the temperature sensor module 51 and the annealing temperature set by the temperature setting unit 53. Among them, the temperature setting unit 53 is connected to the central control module 52, and the temperature setting unit 53 allows the user to set the required annealing temperature. At this time, the user can set the appropriate annealing temperature according to different types of injection molding products to ensure product quality. Among them, the temperature setting unit 53 can use devices such as touch screens and knobs to realize the adjustment and setting of the annealing temperature. Further, the switch unit 54 is connected to the central control module 52 for controlling the opening and closing of the entire system. The display 55 is used to display the outlet temperature of the electric heat generator 30 detected by the temperature sensor module 51 and the annealing temperature set by the temperature setting unit 53, so as to provide real-time temperature data, which is convenient for operators to monitor and adjust. Further, when the temperature setting unit 53 sets the annealing temperature, the central control module 52 controls the working state of the electric heat generator 30 and the blower 40 according to the outlet temperature of the electric heat generator 30 detected by the temperature sensor module 51 and the annealing temperature set by the temperature setting unit 53, so as to finally achieve the consistency between the outlet temperature of the electric heat generator 30 and the annealing temperature. Specifically, it monitors the outlet temperature of the electric heat generator 30 detected by the temperature sensor module 51 and the annealing temperature set by the user in real time, and compares and calculates the temperature error. At this time, according to the temperature error, the conventional PID control algorithm in the prior art is used to calculate the working state of the electric heat generator 30 and the blower 40 that needs to be adjusted. And correspondingly send control signals to the electric heat generator 30 and the blower, so that the electric heat generator 30 and the blower 40 adjust the working parameters according to the control signal, thereby adjusting the temperature of the air outlet of the electric heat generator 30, so that the actual temperature of the heat preservation box 10 reaches the annealing temperature. At the same time, continuous monitoring and adjustment are carried out to ensure that the temperature of the heat preservation box 10 is stable near the set annealing temperature.

[0049] Among them, in one embodiment of the utility model, the over-temperature protection device 50 also includes a relay module 56 connected between the central control module 52 and the electric heat generator 30, and a delay module 57 connected between the relay module 56 and the blower 40;

[0050] The relay module 56 is used to control the working state of the heating tube 31 in the electric heat generator 30 according to the control signal sent by the central control module 52;

[0051] The delay module 57 is used to control the blower 40 to continue working for a preset time when the relay module 56 stops working.

[0052] Among them, the relay module 56 is located between the central control module 52 and the electric heat generator 30, and is used to receive the control signal of the central control module 52, adjust the working state of the heating tube 31 in the electric heat generator 30, and ensure that the heating tube 31 works within a reasonable temperature range. The relay module 56 can provide electrical isolation to prevent the high voltage or current in the electric heat generator 30 from affecting the central control module 52. At the same time, the relay module 56 can provide appropriate load matching to ensure that the central control module 52 can normally control the switching operation of the electric heat generator 30. In addition, the relay module 56 usually has overload protection and short circuit protection functions, which can effectively protect the electric heat generator 30 and the central control module 52 from unexpected failures or excessive loads. At the same time, the relay module 56 can be designed according to a universal interface standard, so as to be compatible with various types of electric heat generators 30 and central control modules 52 of different manufacturers. At the same time, the use of the relay module 56 can make it easier to maintain or upgrade the electric heat generator 30. Since the relay module 56 acts as an intermediary, the control logic or electrical components can be replaced or upgraded more flexibly.

[0053] Among them, the delay module 57 is connected between the relay module 56 and the blower 40. When the relay module 56 stops working, the delay module 57 controls the blower 40 to continue running for a preset time to ensure that the residual heat inside the electric heat generator 30 is fully discharged, so that the hot air is completely transmitted to the insulation box 10 to prevent overheating from causing equipment damage.

[0054] In one embodiment of the present invention, the system further comprises a first carrier 60 for carrying the over-temperature protection device 50 and the electric heat generator 30, and a second carrier 70 for carrying the heat preservation box 10 and making the heat preservation box 10 tilted;

[0055] The second support frame 70 includes a support rod 71 disposed at the bottom of the insulation box 10 to support the insulation box 10, a protection rod 72 disposed at both sides of the insulation box 10 to protect the insulation box 10, and a resistance rod 73 disposed on the inclined bottom surface of the insulation box 10 to resist the sliding of the insulation box 10.

[0056] Among them, the first support frame 60 is used to support and install the electric heat generator 30 and the over-temperature protection device 50. It provides a structural support so that these key components can be safely placed in the system to ensure their stability and normal operation. The second support frame 70 is used to support the insulation box 10, and is designed to allow the insulation box 10 to be tilted to facilitate the flow of hot air and product annealing. The tilted setting helps to optimize the heat distribution or flow inside the insulation box 10. At the same time, the tilted setting makes the opening position of the insulation box 10 more accessible, which helps operators to load and unload products. At the same time, in some process processes, condensed water or other liquids may be generated in the insulation box 10. The tilted setting can facilitate the liquid to gather at a low point and discharge, preventing the liquid from being retained in the insulation box 10 and affecting the insulation effect.

[0057] The second bearing frame 70 includes a bearing rod 71, a protective rod 72 and a stop rod 73. The bearing rod 71 is located at the bottom of the incubator 10 and is mainly responsible for bearing and supporting the weight of the entire incubator 10 to ensure that the incubator 10 is firmly placed in the system. The protective rod 72 is installed on both sides of the incubator 10 and its main function is to provide additional structural support and protection to prevent the incubator 10 from tilting or becoming unstable due to external force or operation during use. The stop rod 73 is located on the inclined bottom surface of the incubator 10 and its function is to prevent the incubator 10 from sliding or moving when it is tilted, thereby maintaining its stability and the required tilt angle.

[0058] The working principle of the annealing box insulation system is as follows: when the user controls the switch unit 54 to start the system, the blower 40 will send room temperature air into the heating tube 31 of the electric heat generator 30 for heating. The heated air enters the insulation box 10 through the air supply pipe 20, gradually increasing the temperature inside the insulation box 10. The temperature sensor module 51 monitors the air outlet temperature of the electric heat generator 30 in real time and feeds the data back to the central control module 52. The user sets the required annealing temperature through the temperature setting unit 53, and the central control module 52 automatically adjusts the temperature of the electric heat generator 30 and the air volume of the blower 40 according to the set annealing temperature and the air outlet temperature of the electric heat generator 30, to ensure that the temperature of the insulation box 10 is stable. When the temperature of the heat preservation box 10 reaches the set annealing temperature, the central control module 52 sends a control signal to make the relay module 56 control the electric heat generator 30 to stop working, but the delay module 57 controls the blower 40 to continue working for a preset time, ensuring that all the hot air in the electric heat generator 30 is delivered to the heat preservation box 10 to avoid heat energy waste. Therefore, the over-temperature protection device 50 can effectively control the temperature in the heat preservation box 10, prevent the temperature in the heat preservation box 10 from being too high, and ensure the safety of the entire system and the annealing effect.

[0059] Therefore, the annealing box insulation system provided by the embodiment of the utility model can accurately control the temperature, reduce energy consumption, reduce operating costs, ensure the temperature stability in the insulation box through real-time monitoring and calculation, effectively eliminate the internal stress of the injection molded product, prevent deformation, and improve product quality. In addition, the system structure is simple and easy to install and maintain.

[0060] In summary, the annealing box insulation system in the above-mentioned embodiment of the utility model monitors the outlet temperature of the electric heat generator in real time through the temperature sensor module, and the central control module makes instant adjustments to the temperature of the electric heat generator and the air volume of the blower according to the temperature change, thereby ensuring that the hot air temperature output by the system is stable, avoiding temperature fluctuations, and ensuring accurate control of the temperature in the annealing box. The insulation box is connected to the air supply pipe so that hot air with consistent temperature can be continuously received, so that the hot air is evenly distributed in the insulation box, avoiding local overheating or uneven temperature in the insulation box, improving the annealing effect and product quality, and solving the problem that the temperature distribution in the existing annealing box is uneven and difficult to accurately control.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. An annealing box insulation system, characterized in that: The system includes an insulated box, an air supply pipe connected to the insulated box, an electric heat generator connected to the air supply pipe, a blower arranged on the electric heat generator, and an over-temperature protection device connected to the front end of the electric heat generator, the over-temperature protection device includes a temperature sensor module for detecting the temperature of the air outlet of the electric heat generator, and a central control module electrically connected to the electric heat generator, the blower and the temperature sensor module respectively; The products to be annealed after injection molding are placed in the thermal insulation box, the electric heat generator is provided with a heating tube for heating air, the blower is used to pump air from the air inlet of the electric heat generator to the heating tube for heat exchange into hot air, and then pumped out from the air outlet of the electric heat generator to the air supply pipe, and the central control module is used to adjust the temperature of the electric heat generator and the air volume of the blower according to the temperature detected by the temperature sensor module.

2. The annealing box insulation system according to claim 1, characterized in that: The over-temperature protection device also includes a relay module connected between the central control module and the electric heat generator, and a delay module connected between the relay module and the blower; The relay module is used to control the working state of the heating tube in the electric heat generator according to the control signal sent by the central control module; The delay module is used to control the blower to continue working for a preset time when the relay module stops working.

3. The annealing box insulation system according to claim 1, characterized in that: The over-temperature protection device also includes a temperature setting unit, a switch unit and a display; The temperature setting unit is connected to the central control module and is used to set the annealing temperature; The switch unit is connected to the central control module and is used to control the switch of the system; The display is connected to the temperature sensor module and the temperature setting unit respectively, and is used to display the temperature detected by the temperature sensor module and the annealing temperature set by the temperature setting unit.

4. The annealing box insulation system according to claim 1, characterized in that: The air outlet and air inlet of the electric heat generator are respectively arranged at the left and right ends of the electric heat generator, the heating pipe is arranged at the air inlet of the electric heat generator, and the blower is arranged at the upper end of the electric heat generator and close to the air outlet of the electric heat generator.

5. The annealing box insulation system according to claim 4, characterized in that: The heating tube is a U-shaped tube, and the heating tube is transversely arranged inside the electric heat generator in a direction parallel to the air flow direction.

6. The annealing box insulation system according to claim 1, characterized in that: The insulation box is provided with an air inlet and an air outlet. The air inlet of the insulation box is located on one side of the air outlet of the electric heat generator and close to the air outlet of the electric heat generator. The air outlet of the insulation box is located on one side of the air inlet of the electric heat generator and away from the air inlet of the electric heat generator. The air inlet of the insulation box is connected to the air supply pipe.

7. The annealing box insulation system according to claim 6, characterized in that: The system also includes an air duct connected to the air inlet of the electric heat generator and the air outlet of the heat preservation box respectively.

8. The annealing box insulation system according to claim 6, characterized in that: There is at least one incubator box, the number of the air supply pipes is the same as the number of the incubator boxes, the air inlet of each incubator box is connected to the corresponding air supply pipe, and each air supply pipe is connected to the air outlet of the electric heat generator.

9. The annealing box insulation system according to claim 1, characterized in that: The temperature sensor module comprises a probe which extends out from one side of the over-temperature protection device corresponding to the air outlet of the electric heat generator and is then installed in the air supply pipe and located at the air outlet of the electric heat generator.

10. The annealing box insulation system according to claim 1, characterized in that: The system further comprises a first carrier for carrying the over-temperature protection device and the electric heat generator, and a second carrier for carrying the heat preservation box and tilting the heat preservation box; The second supporting frame includes a supporting rod disposed at the bottom of the insulation box to support the insulation box, a protective rod disposed at both sides of the insulation box to protect the insulation box, and a resisting rod disposed on the inclined bottom surface of the insulation box to resist the sliding of the insulation box.

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