Injection molded part stress relief detection device

Abstract

The application relates to the technical field of stress detection, in particular to an injection molding part stress release detection device, which comprises a box body, a box door, a sealing ring, a taking and placing groove, a stress detection assembly, an adjusting assembly, an infrared distance measuring sensor, a separation assembly, a communication assembly and a cold air inlet assembly; the stress detection assembly and the separation assembly are both installed between the inner walls of the box body, and the separation assembly is located above the stress detection assembly. The air pressure in the heating space and the air pressure in the cooling space are changed by controlling the movement of the corresponding adjusting assembly, and the hot air and the cold air are respectively recycled and stored, so that when the temperature sudden change method is used for the stress release detection of the digital television new material injection molding part, the problem that the injection molding part frequently switches between the heating and cooling states, the residual air in the detection space affects the state switching efficiency of the injection molding part, the temperature control precision of the injection molding part is difficult to control, and more energy is wasted is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of stress detection, in particular to a stress release detection device for injection molding parts. BACKGROUND

[0002] Digital television external structural parts and internal functional parts (such as circuit board fixing supports, heat dissipation air ducts and interface panels) are usually made of plastic as raw materials and are produced and manufactured through an injection molding process. When a digital television manufacturer changes and adjusts the plastic composition to explore and develop new materials, in order to ensure that the produced digital television injection molding parts can meet the actual use requirements, a stress release detection device needs to be used to detect the stress before mass production.

[0003] When the digital television injection molding parts are subjected to stress detection, there are mainly solvent method, instrument method and temperature sudden change method. Since the heat dissipation air duct part of the digital television injection molding part is used to guide air flow for heat dissipation and needs to withstand high temperature above 80 DEG C for a long time, the temperature sudden change method is usually used to detect the stress of the heat dissipation air duct injection molding part as far as possible close to the actual working scene.

[0004] When the stress is detected through the temperature sudden change method, the tested part is placed on the support in the sealed space, and the resistance strain gauge type stress sensor in the plurality of mechanical sensors is attached to the bottom surface of the tested part. The resistance strain gauge type stress sensor is composed of a sensitive grid, a substrate, a cover layer and a lead wire, and the sensitive grid is the core part of the resistance strain gauge type stress sensor and is usually made of a metal wire or a metal foil. The substrate is used to paste the sensitive grid and paste it on the surface of the measured object, so that the sensitive grid can deform with the deformation of the measured object. The cover layer mainly protects the sensitive grid and prevents the sensitive grid from being damaged and interfered by the outside world. When the measured object is subjected to external force and generates strain, the sensitive grid of the strain gauge pasted on the surface of the object generates the same strain. This strain causes the resistance value of the sensitive grid to change. By measuring the change of the resistance value, the strain of the measured object can be calculated by using the corresponding formula.

[0005] In the detection process of the heat dissipation air duct injection molding part by using the temperature sudden change method, since the temperature of the environment where the heat dissipation air duct injection molding part is located needs to be changed constantly, when the heat dissipation air duct injection molding part is frequently heated and cooled, the air in the closed detection space where the heat dissipation air duct injection molding part is located will exchange heat with the heat dissipation air duct injection molding part, and then the temperature in the closed detection space will also change constantly. When the heat dissipation air duct injection molding part is switched from the heating state to the cooling state or from the cooling state to the heating state, the residual air in the detection space and the gas introduced after the temperature control state of the injection molding part is switched will inevitably exchange heat to a large extent due to the large temperature difference, so that the temperature control precision of the injection molding part is difficult to control, and in addition, a lot of energy is wasted.

[0006] To this end, a stress release detection device for injection molded parts is provided. SUMMARY

[0007] The present application aims to provide a stress release detection device for injection molded parts, which solves the problem of frequent switching of injection molded parts between heating and cooling states, the influence of residual air in the detection space on the state switching efficiency of injection molded parts, and the difficulty in controlling the temperature control accuracy of injection molded parts, resulting in a lot of energy waste, by controlling the movement of the corresponding adjustment assembly to correspondingly change the air pressure in the heating space and the air pressure in the cooling space, and storing the hot air and cold air separately.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0009] A stress release detection device for injection molded parts, comprising a box body, a box door, a sealing ring, a taking and placing groove, a stress detection assembly, an adjustment assembly, an infrared distance sensor, a separation assembly, a communication assembly and a cold air inlet assembly, the stress detection assembly and the separation assembly are installed between the inner walls of the box body, and the separation assembly is located above the stress detection assembly, two sets of the adjustment assembly are installed inside the box body, and are located below the stress detection assembly and above the separation assembly respectively, the infrared distance sensor is installed on the inner top surface and the inner bottom surface of the box body, a plurality of the communication assemblies are installed on the separation assembly at equal intervals, the cold air inlet assembly is installed on the side wall of the box body, and the cold air inlet assembly is located below the stress detection assembly, the adjustment assembly above exerts pressure on the communication assembly when it moves down, and the hot air above the separation assembly is pressed between the stress detection assembly and the separation assembly, the adjustment assembly below exerts pressure on the cold air between it and the stress detection assembly when it moves up, and the cold air or hot air between the stress detection assembly and the separation assembly is pumped back to below the stress detection assembly or above the separation assembly when the corresponding adjustment assembly is reset.

[0010] Preferably, the stress detection assembly comprises a detection plate, a first communication hole, a first electromagnetic valve, a support rod and a resistance strain gauge stress sensor, the detection plate is installed between the inner walls of the box body, two rows of the first communication holes are arranged in parallel on the surface of the detection plate, a plurality of the first electromagnetic valves are installed in the plurality of first communication holes respectively, the support rods are installed on the surface of the detection plate alternately, and the resistance strain gauge stress sensor is installed on the top of the support rod.

[0011] Preferably, the detection plate surface is provided with a plurality of parallel distribution guide grooves, and the bottom surface of the detection plate is provided with a plurality of parallel distribution semicircular grooves.

[0012] Preferably, the adjusting assembly comprises an electric sliding rail, a guide rail sliding block and a flat plate, the electric sliding rail is embedded in the inner wall of the box, the guide rail sliding block is connected with the moving part of the electric sliding rail, the flat plate is installed on the side wall of the guide rail sliding block, and the flat plate is attached to the inner wall of the box around.

[0013] Preferably, the guide rail sliding block and the side of the box in contact are attached with a first sealing strip, and the flat plate around is attached with a second sealing strip.

[0014] Preferably, the separating assembly comprises an upper partition plate, a plurality of tapered holes, a heat insulation cavity, a support, a second electromagnetic valve, a heating plate and a wave-shaped groove, the upper partition plate is installed between the inner walls of the box, a plurality of equally spaced through holes are arranged on the central axis of the upper partition plate, two rows of tapered holes are arranged side by side on the surface of the upper partition plate, a plurality of second electromagnetic valves are installed in the tapered holes respectively, the heat insulation cavity is arranged in the upper partition plate, the support is installed on the surface of the upper partition plate, the heating plate is installed on the surface of the support, and the wave-shaped groove is arranged on the surface of the heating plate.

[0015] Preferably, the communicating assembly comprises a closing plate, a vertical rod, a reset spring, a top plate and a pressure sensor, the closing plate is attached to the bottom of the through hole, the vertical rod is installed on the top of the closing plate, the reset spring is arranged on the outer periphery of the vertical rod, the top plate is installed on the top of the vertical rod, the reset spring is abutted between the surface of the heating plate and the bottom surface of the top plate, and the pressure sensor is installed on the surface of the top plate.

[0016] Preferably, the bottom of the closing plate is provided with a bowl-shaped groove.

[0017] Preferably, the cold air inlet assembly comprises a cold air inlet pipe, a third electromagnetic valve, a connecting seat and an air outlet hole, the connecting seat is connected to the side wall of the box, the cold air inlet pipe is connected to the side wall of the connecting seat, the third electromagnetic valve is installed on the cold air inlet pipe, and the air outlet hole is equally spaced on the inner wall of the box and located on the inner side of the connecting seat.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] 1. The application is when the temperature of the detection space is frequently switched when the stress release detection of the digital TV injection molding part made of new materials is carried out by using the temperature sudden change method, the adjusting assembly of the corresponding orientation is started, cold air or hot air can be quickly pushed into the detection space, and when the adjusting assembly is reset, the hot air or cold air in the detection space can be pre-extracted and stored separately, by reducing the temperature difference before and after the temperature adjustment switching state of the injection molding part in the detection space, the stress release detection efficiency of the injection molding part can be greatly improved, and the temperature adjustment of the injection molding part can be accurately controlled, the energy waste can be effectively reduced, and the application efficiency of the resistance strain gauge stress sensor is effectively improved.

[0020] 2. By setting the stress detection assembly and the separation assembly, the box is divided into three independent spaces under the action of the upper partition plate and the detection plate, the upper space is used for storing hot air and heated air, the middle space is used for placing the injection molding part to be detected, and the lower space is used for storing cold air and cooling air, when the injection molding part to be detected needs to be heated, the cold air is extracted to the lower space by resetting the lower adjusting assembly, the hot air is quickly introduced into the detection space after being extruded by the upper adjusting assembly, when the injection molding part to be detected needs to be cooled, the hot air is extracted to the upper space by resetting the upper adjusting assembly, and the cold air is quickly introduced into the detection space by the cold air introduced by the lower adjusting assembly, which can avoid the large difference between the residual air in the detection space and the subsequent introduced air, thereby reducing energy waste and greatly improving the temperature change speed of the injection molding part, thereby improving the stress release detection efficiency of the injection molding part.

[0021] 3. By setting the separation assembly and the communication assembly, when the upper adjusting assembly moves downward, the air in the upper space is fully extruded before the adjusting assembly contacts the communication assembly, the heating plate can efficiently heat the air in a small space, and then when the adjusting assembly presses the communication assembly, the upper space is communicated with the detection space, thereby quickly introducing hot air into the detection space to heat the injection molding part, thereby greatly improving the stress release detection efficiency of the digital TV injection molding part. DETAILED DESCRIPTION

[0022] Figure 1 It is a schematic diagram of the overall structure of the application;

[0023] Figure 2 It is a schematic diagram of the structure of the box of the application;

[0024] Figure 3 It is a sectional view of the box of the application;

[0025] Figure 4 It is a schematic diagram of the stress detection assembly of the application;

[0026] Figure 5Structure diagram of the adjusting assembly of the present application;

[0027] Figure 6 Structure diagram of the separating assembly of the present application;

[0028] Figure 7 Sectional view of the upper partition plate of the present application;

[0029] Figure 8 Structure diagram of the communicating assembly of the present application.

[0030] In the figure: 1, box body; 2, box door; 3, sealing ring; 4, taking and placing groove; 5, stress detection assembly; 51, detection plate; 52, first communicating hole; 53, first electromagnetic valve; 54, support rod; 55, resistance strain gauge type stress sensor; 56, guide groove; 6, adjusting assembly; 61, electric sliding rail; 62, guide rail sliding block; 63, first sealing strip; 64, flat plate; 641, second sealing strip; 7, infrared distance measuring sensor; 8, separating assembly; 81, upper partition plate; 811, flow-through hole; 82, conical hole; 83, heat insulation cavity; 84, support; 85, second electromagnetic valve; 86, heating plate; 87, wavy groove; 9, communicating assembly; 91, closing plate; 911, bowl-shaped groove; 92, vertical rod; 93, return spring; 94, top plate; 95, pressure sensor; 10, cold air inlet assembly; 101, cold air inlet pipe; 102, third electromagnetic valve; 103, connecting seat; 104, air outlet hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] Please refer to Figures 1 to 8 The present application provides a stress release detection device for injection molding parts, and the technical solutions are as follows:

[0033] Refer to Figure 1 , Figure 2 and Figure 3The utility model provides an injection molding stress release detection device, including box 1, box door 2, sealing ring 3, take and place groove 4, box door 2 is installed through the hinge in the lateral wall of box 1, sealing ring 3 is attached in the lateral wall of box 1, and take and place groove 4 is set up in the lateral wall of box 1, and take and place groove 4 section is mouth character, and is located in the inboard of sealing ring 3, and box door 2 is attached with sealing ring 3 when closing, avoids the air in the escape of box 1, and then guarantees the temperature constant in the detection space inside box 1, still including stress detection subassembly 5, adjusting assembly 6, infrared distance sensor 7, separation component 8, intercommunication component 9 and cold air inlet component 10, stress detection subassembly 5 and separation component 8 are all installed between the inner wall of box 1, and separation component 8 is located above stress detection subassembly 5, and two adjusting assembly 6 are all installed in the inside of box 1, and are located below stress detection subassembly 5 and above separation component 8, under the action of stress detection subassembly 5 and separation component 8, three similar intervals are formed in the inside of box 1, the space above separation component 8 is used to store hot gas, and the air in the space is heated by separation component 8, the space between stress detection subassembly 5 and separation component 8 is detection space, is used to place the injection molding to be measured, the space below stress detection subassembly 5 is cold gas storage space, infrared distance sensor 7 is installed on the inboard top surface and inboard bottom surface of box 1, and infrared distance sensor 7 is used to detect the action of corresponding adjusting assembly 6, and then controls the electromagnetic valve opening and closing state on stress detection subassembly 5 and separation component 8, so that cold gas and hot gas are promptly drawn and stored in the corresponding space, and the required air is passed into the detection space to change the temperature of injection molding, a plurality of intercommunication component 9 are installed on separation component 8 at equal intervals, and cold air inlet component 10 is installed on the lateral wall of box 1, and cold air inlet component 10 is located below stress detection subassembly 5, and cold air inlet component 10 is used to pass into the appropriate low-temperature air in the space below, when the adjusting assembly 6 above moves, the intercommunication component 9 is pressed, and the hot gas above separation component 8 is pressed into the space between stress detection subassembly 5 and separation component 8, when the adjusting assembly 6 below moves, the cold gas between it and stress detection subassembly 5 is pressed into the space between stress detection subassembly 5 and separation component 8, when corresponding adjusting assembly 6 resets, the cold gas or hot gas between stress detection subassembly 5 and separation component 8 is drawn to the space below stress detection subassembly 5 or above separation component 8.

[0034] Reference Figure 4As one of the embodiments of the present application, specifically, the stress detection assembly 5 comprises a detection plate 51, a first communication hole 52, a first electromagnetic valve 53, a support rod 54 and a resistance strain gauge stress sensor 55. The detection plate 51 is installed between the inner walls of the box body 1. Two rows of first communication holes 52 are arranged in parallel on the surface of the detection plate 51. The first communication holes 52 are located at the edge side of the surface of the detection plate 51. A plurality of first electromagnetic valves 53 are respectively installed in the plurality of first communication holes 52. A control host is installed on the outside of the box body 1. The resistance strain gauge stress sensor 55 and the first electromagnetic valve 53 are connected with the control host. The resistance strain gauge stress sensor 55 feeds back stress release data to the control host. The control host can turn on or turn off the first electromagnetic valve 53 according to the detection data of the infrared distance sensor 7. The support rod 54 is staggered and installed on the surface of the detection plate 51. The resistance strain gauge stress sensor 55 is installed on the top of the support rod 54. A plurality of parallel distributed guide grooves 56 are arranged on the surface of the detection plate 51. A plurality of parallel distributed semicircular grooves are arranged on the bottom surface of the detection plate 51. Under the action of the guide grooves 56 and the semicircular grooves, the cold air and the hot air can smoothly enter the detection space by adhering to the surface of the detection plate 51.

[0035] Referring to Figure 5 As one of the embodiments of the present application, specifically, the adjustment assembly 6 comprises an electric sliding rail 61, a guide rail sliding block 62 and a flat plate 64. The electric sliding rail 61 is embedded in the inner wall of the box body 1. The guide rail sliding block 62 is connected with the moving part of the electric sliding rail 61. The flat plate 64 is installed on the side wall of the guide rail sliding block 62. The flat plate 64 is adhered to the inner wall of the box body 1 around. The first sealing strip 63 is adhered to the contact side of the guide rail sliding block 62 and the box body 1. The second sealing strip 641 is adhered to the flat plate 64 around. Under the action of the first sealing strip 63 and the second sealing strip 641, the sealing and adhering effect between the flat plate 64 and the inner wall of the box body 1 around can be ensured during the movement of the flat plate 64, so as to correspondingly extrude the air in the related space or to suck the air in the detection space into the corresponding space.

[0036] Referring to Figure 6 and Figure 7As an embodiment of the present application, specifically, the partition assembly 8 comprises an upper partition plate 81, a tapered hole 82, a heat insulation cavity 83, a support 84, a second electromagnetic valve 85, a heating plate 86 and a wave groove 87. The upper partition plate 81 is installed between the inner walls of the box 1 and is in sealing fit with the box 1. A plurality of flow-through holes 811 are arranged on the central axis of the upper partition plate 81 at equal intervals. The number of the flow-through holes 811 is consistent with the number of the communication assembly 9. The upper and lower parts of the flow-through holes 811 are in the shape of a horn, i.e., the middle part of the flow-through holes 811 is the narrowest. The two rows of tapered holes 82 are arranged side by side on the surface of the upper partition plate 81. The plurality of second electromagnetic valves 85 are respectively installed in the tapered holes 82. The heat insulation cavity 83 is arranged inside the upper partition plate 81. The support 84 is installed on the surface of the upper partition plate 81. The heating plate 86 is installed on the surface of the support 84. The wave groove 87 is arranged on the surface of the heating plate 86. When the upper adjusting assembly 6 moves downward, the power supply of the heating plate 86 is turned on through the infrared distance sensor 7 and the control host. During the compression of the air in the upper space, the compressed air is heated by the heating plate 86. When the upper adjusting assembly 6 is stationary, the power supply of the heating plate 86 is turned off.

[0037] Referring to Figure 8 As an embodiment of the present application, specifically, the communication assembly 9 comprises a closing plate 91, a vertical rod 92, a return spring 93, a top plate 94 and a pressure sensor 95. The closing plate 91 is attached to the bottom of the flow-through hole 811. The vertical rod 92 is installed on the top of the closing plate 91. The return spring 93 is arranged on the outer periphery of the vertical rod 92. The top plate 94 is installed on the top of the vertical rod 92. The return spring 93 is in abutment between the surface of the heating plate 86 and the bottom surface of the top plate 94. Under the action of the return spring 93, when the upper adjusting assembly 6 exerts pressure on the vertical rod 92 through the top plate 94, the top plate 94 moves downward, the closing plate 91 moves downward and separates from the flow-through hole 811, and the return spring 93 is in a compressed state. When the upper adjusting assembly 6 is reset, the top plate 94 and the closing plate 91 can be reset under the action of the return spring 93 after the top plate 94 loses the pressure exerted by the adjusting assembly 6. The pressure sensor 95 is installed on the surface of the top plate 94. The bottom of the closing plate 91 is provided with a bowl-shaped groove 911. Under the action of the bowl-shaped groove 911, when the upper adjusting assembly 6 is reset, the air pressure in the detection space is large, and the air pressure can be used to quickly lift and reset the closing plate 91, so that the closing plate 91 is attached to the flow-through hole 811 to close the flow-through hole 811.

[0038] Referring to Figure 3As an embodiment of the present application, specifically, the cold air inlet assembly 10 comprises a cold air inlet pipe 101, a third electromagnetic valve 102, a connecting seat 103 and an air outlet hole 104, the connecting seat 103 is connected to the side wall of the box 1, the cold air inlet pipe 101 is connected to the side wall of the connecting seat 103, the third electromagnetic valve 102 is installed on the cold air inlet pipe 101, the air outlet hole 104 is equidistantly arranged on the inner wall of the box 1, and the air outlet hole 104 is located inside the connecting seat 103, the cold air inlet pipe 101 is connected to the external refrigeration equipment, since the cold air generated by the refrigeration equipment is introduced into the lower space, the third electromagnetic valve 102 is also connected to the control host, so that the control host timely switches the third electromagnetic valve 102 to the open state, and then a proper amount of cold air is supplemented into the lower space.

[0039] Working principle: first, the to-be-tested injection molded part is placed on the surface of the stress detection assembly 5, the to-be-tested injection molded part is placed on the surface of the resistance strain gauge stress sensor 55, and the resistance strain gauge stress sensor 55 is kept tightly attached to the bottom surface of the to-be-tested injection molded part, and the box door 2 is closed, then the pre-control separation assembly 8 heats the air in the upper space to a suitable temperature, and the cold air inlet assembly 10 introduces low-temperature air into the lower space; when stress release detection is performed, the to-be-tested injection molded part is first heated, the upper adjusting assembly 6 moves downward, and the heating plate 86 heats the air in the upper space in the process, when the upper adjusting assembly 6 exerts pressure on the communication assembly 9, the upper space is communicated with the detection space, and then high-temperature air is introduced into the detection space, thereby heating the to-be-tested injection molded part, after heating to the detection temperature, first, the upper adjusting assembly 6 is reset, when the upper adjusting assembly 6 moves upward is detected by the upper infrared distance sensor 7, the second electromagnetic valve 85 on the stress detection assembly 5 is switched to the open state by the control host, the space between the upper adjusting assembly 6 and the stress detection assembly 5 increases, thereby the heat in the detection space is drawn back to the upper space, the first electromagnetic valve 53 is opened for a period of time and then automatically closed, then the lower adjusting assembly 6 moves upward, when the adjusting assembly 6 moves upward is detected by the lower infrared distance sensor 7, the first electromagnetic valve 53 is switched to the open state by the control host, the space formed by the stress detection assembly 5 and the lower adjusting assembly 6 decreases, thereby cold air is quickly introduced into the detection space to cool the to-be-tested injection molded part, the above state is continuously switched, when stress release occurs in the to-be-tested injection molded part, data collection is completed by the resistance strain gauge stress sensor 55;

[0040] Specifically, when the to-be-tested injection molded part is heated, the electric slide rail 61 in the upper adjusting assembly 6 drives the flat plate 64 to move downward through the guide rail slider 62, and the air heated by the heating plate 86 is pressurized. When the flat plate 64 contacts the top plate 94 and continues to move downward, the top plate 94, the vertical rod 92 and the closing plate 91 continue to move downward, the closing plate 91 is separated from the flow-through hole 811, and then the upper space is communicated with the detection space, the high-pressure hot air quickly enters the detection space and exchanges heat with the to-be-tested injection molded part. After the to-be-tested injection molded part is heated to the corresponding temperature, the electric slide rail 61 in the upper adjusting assembly 6 resets the flat plate 64, and the upper infrared distance sensor 7 detects that the flat plate 64 moves upward, and the second electromagnetic valve 85 is opened through the control host. When the flat plate 64 moves upward, the hot air in the detection space is sucked into the upper space, and at the same time, the electric slide rail 61 in the lower adjusting assembly 6 drives the corresponding flat plate 64 to move upward, and when the lower infrared distance sensor 7 detects that the flat plate 64 moves upward, the first electromagnetic valve 53 is switched to the open state, and the space volume formed by the upper partition plate 81 and the lower flat plate 64 is reduced, so that the cold air is quickly introduced into the detection space to exchange heat with the to-be-tested injection molded part, and the to-be-tested injection molded part is cooled to the appropriate temperature. Then the electric slide rail 61 drives the flat plate 64 to reset, and when the flat plate 64 moves to the lowest position, the control host closes the first electromagnetic valve 53. During the resetting process of the flat plate 64, the cold air is sucked into the lower space, so as to realize the rapid stress release detection of the to-be-tested injection molded part.

[0041] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stress release detection device for injection molded parts, comprising a box (1), a box door (2), a sealing ring (3), a taking and placing groove (4), characterized in that: It also includes stress detection assembly (5), adjusting assembly (6), infrared distance sensor (7), separation assembly (8), communication assembly (9) and cold air inlet assembly (10), the stress detection assembly (5) and separation assembly (8) are installed between the inner wall of the box (1), and the separation assembly (8) is located above the stress detection assembly (5), two adjusting assembly (6) are installed in the box (1) inside, and are located below the stress detection assembly (5) and above the separation assembly (8), the infrared distance sensor (7) is installed on the inside top surface and the inside bottom surface of the box (1), a plurality of communication assembly (9) is installed on the separation assembly (8) at equal intervals, the cold air inlet assembly (10) is installed on the side wall of the box (1), and the cold air inlet assembly (10) is located below the stress detection assembly (5), the adjusting assembly (6) above moves and presses the communication assembly (9), and the hot air above the separation assembly (8) is pressed into the stress detection assembly (5) and the separation assembly (8), the adjusting assembly (6) below moves and presses the cold air between the stress detection assembly (5), the stress detection assembly (5) and the separation assembly (8) are sucked back to the stress detection assembly (5) below or the separation assembly (8) above when the corresponding adjusting assembly (6) resets.

2. The stress relief detection apparatus for injection molded parts of claim 1, wherein: The stress detection assembly (5) comprises a detection plate (51), a first communication hole (52), a first electromagnetic valve (53), a support rod (54) and a resistance strain gauge stress sensor (55), the detection plate (51) is installed between the inner wall of the box (1), two rows of first communication holes (52) are arranged in parallel on the surface of the detection plate (51), a plurality of first electromagnetic valves (53) are installed in a plurality of first communication holes (52) respectively, the support rod (54) is installed on the surface of the detection plate (51) alternately, and the resistance strain gauge stress sensor (55) is installed on the top of the support rod (54).

3. The stress relief detection apparatus for injection molded parts of claim 2, wherein: A plurality of parallel distribution guide grooves (56) are arranged on the surface of the detection plate (51), and a plurality of parallel distribution semicircular grooves are arranged on the bottom surface of the detection plate (51).

4. The stress relief detection apparatus for injection molded parts of claim 3, wherein: The adjusting assembly (6) comprises an electric sliding rail (61), a guide rail sliding block (62) and a flat plate (64), the electric sliding rail (61) is embedded in the inner wall of the box (1), the guide rail sliding block (62) is connected with the moving part of the electric sliding rail (61), the flat plate (64) is installed on the side wall of the guide rail sliding block (62), and the flat plate (64) is matched with the inner wall of the box (1) around.

5. The stress relief detection apparatus for injection molded parts of claim 4, wherein: The guide rail sliding block (62) is matched with the first sealing strip (63) on the contact side of the box (1), and the flat plate (64) is matched with the second sealing strip (641) around.

6. The stress release detection apparatus for injection molded parts of claim 1, wherein: The separating assembly (8) comprises an upper partition plate (81), a tapered hole (82), a heat insulation cavity (83), a support (84), a second electromagnetic valve (85), a heating plate (86) and a wave-shaped groove (87), the upper partition plate (81) is installed between the inner walls of the box body (1), a plurality of equally spaced flow-through holes (811) are arranged on the central axis of the upper partition plate (81), two rows of the tapered holes (82) are arranged side by side on the surface of the upper partition plate (81), a plurality of the second electromagnetic valves (85) are respectively installed in the tapered holes (82), the heat insulation cavity (83) is arranged inside the upper partition plate (81), the support (84) is installed on the surface of the upper partition plate (81), the heating plate (86) is installed on the surface of the support (84), and the wave-shaped groove (87) is arranged on the surface of the heating plate (86).

7. The stress relief detection apparatus for injection molded parts of claim 6, wherein: The communication assembly (9) comprises a closing plate (91), a vertical rod (92), a reset spring (93), a top plate (94) and a pressure sensor (95), the closing plate (91) is attached to the bottom of the flow-through hole (811), the vertical rod (92) is installed on the top of the closing plate (91), the reset spring (93) is arranged on the outer periphery of the vertical rod (92), the top plate (94) is installed on the top of the vertical rod (92), the reset spring (93) is abutted between the surface of the heating plate (86) and the bottom surface of the top plate (94), and the pressure sensor (95) is installed on the surface of the top plate (94).

8. The stress relief detection apparatus for injection molded parts of claim 7, wherein: The bottom of the closing plate (91) is provided with a bowl-shaped groove (911).

9. The stress release detection apparatus for injection molded parts of claim 1, wherein: The cold air inlet assembly (10) comprises a cold air inlet pipe (101), a third electromagnetic valve (102), a connecting seat (103) and an air outlet hole (104), the connecting seat (103) is connected to the side wall of the box body (1), the cold air inlet pipe (101) is connected to the side wall of the connecting seat (103), the third electromagnetic valve (102) is installed on the cold air inlet pipe (101), and the air outlet hole (104) is equally spaced on the inner wall of the box body (1) and located on the inner side of the connecting seat (103).

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