Pressurized injection mold sealing performance detection device

Abstract

The invention relates to the technical field of injection mold detection, in particular to a pressurized injection mold sealing performance detection device. The device comprises a detection assembly, the detection assembly comprises a supporting mechanism, a sealing piece is arranged on the outer wall of the attaching position of a fixed mold body and a movable mold body, a pressurization injection mechanism is installed at an injection molding opening of the fixed mold body in a sealed mode, and the other side of the pressurization injection mechanism is installed on the inner wall of the supporting mechanism. The pressure sensor body receives sensing and sends out a signal, so that the gas injection head stops gas conveying, the movable mold body is pushed by means of external force to perform mold closing operation again, and in the mold closing process, the connecting rod can generate an extrusion effect on the sealing piece, so that the sealing piece is prevented from being damaged. The volume of the cavity in the sealing state is obtained by calculating the total conveying amount of the gas and the amount of the gas finally remaining in the sealing piece, and in the subsequent using process, as long as the amount of the injected gas does not exceed the volume, the mold body can maintain the sealing state.

Description

Technical Field

[0001] The invention relates to the technical field of injection mold detection, in particular to a pressurized injection mold sealing detection device. Background Art

[0002] Injection molds are key process equipment used in the plastics processing industry to form plastic products. Through a specific cavity structure, they give the plastic melt the desired shape and dimensional accuracy during the injection molding process. When injecting the injection liquid into the injection mold cavity, bubble generation is a common problem. When the molding liquid fills the cavity, bubbles are easily formed in the cavity due to various factors, such as the molding liquid itself contains gas, the injection speed is too fast and causes air to be drawn in, etc. These bubbles occupy the space in the mold cavity and interfere with the normal judgment mechanism of the injection molding equipment. The injection molding equipment usually controls the injection molding process according to the set parameters such as pressure, time or stroke. When there are bubbles in the cavity, the pressure or other signals fed back to the equipment may cause the equipment to mistakenly believe that the injection molding process has been completed, thereby terminating the injection molding prematurely, and ultimately causing the molded product to contain bubbles, seriously affecting the appearance integrity of the product.

[0003] To deal with this common bubble problem, the commonly used method in the current injection molding process is that during the injection molding process, even if the injection mold encounters resistance caused by bubbles or other reasons, the injection liquid is still continuously injected. This strategy can, to a certain extent, squeeze out the bubbles in the cavity or dissolve them in the injection liquid by increasing the injection pressure and continuous melt flow, thereby reducing the retention of bubbles in the cavity and improving the molding quality of the product. Therefore, before using the injection mold, a simple test of its internal capacity is carried out first, the purpose is to clarify the injection volume required for the mold to maintain a sealed state during injection molding. However, since the injection mold is generally opaque, it is difficult for the operator to directly observe the actual injection volume of the injection liquid in the cavity. During the continuous inflation pressurization test, it is easy to inject too much injection liquid. Once too much injection liquid exceeds the cavity capacity, it will leak from the parting surface, gate and other parts of the mold, which brings inconvenience to the detection of the cavity inflation volume. Summary of the invention

[0004] The object of the present invention is to provide a pressurized injection mold sealing detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides a pressurized injection mold sealing detection device, including a detection component, the detection component includes a support mechanism, the internal support of the support mechanism is supported by a mold body, the mold body includes a fixed mold body and a movable mold body, and the fixed mold body and the movable mold body are molded together to form a cavity; A sealing member is adsorbed on the outer wall of the joint between the fixed mold body and the movable mold body, a pressurized injection mechanism is sealed and installed at the injection port of the fixed mold body, and the other side of the pressurized injection mechanism is installed on the inner wall of the support mechanism; During the process of the pressurized injection mechanism injecting gas into the interior of the cavity, the seal is used to assist the cavity in maintaining a sealed state. As the pressurized injection mechanism continues to operate, the volume in the cavity becomes excessive and the movable mold body slides to open the mold. At this time, the seal is used to retain the gas leaked during the mold opening. During the process of the movable mold body opening the mold, the pressurized injection mechanism receives the extrusion force and stops. Subsequently, the movable mold body slides in the opposite direction to close the mold. At the same time, the support mechanism can squeeze the seal to force the gas in the seal to flow back into the cavity. By calculating the amount of gas injected by the pressurized injection mechanism and the amount of gas in the seal, the capacity value of the cavity in a sealed state can be obtained.

[0006] As a further improvement of the present technical solution, the supporting mechanism includes a folding frame, which is an "L"-shaped structure. A middle ring plate is fixedly installed on one end of the folding frame, and a sliding cavity is formed between the middle ring plate and the folding frame. A fixed support plate is movably connected to the end of the middle ring plate away from the sliding cavity. The fixed support plate is a hollow structure for supporting a fixed mold body. Four groups of connecting rods are slidingly arranged on the inner wall of the middle ring plate. The four groups of connecting rods cooperate with each other to support the movable mold body, and the ends of the four groups of connecting rods away from the middle ring plate are all located inside the sliding cavity.

[0007] As a further improvement of the present technical solution, the four groups of connecting rods all include an extension plate, the end of the extension plate close to the sliding cavity is in a bent state, and a plurality of elastic parts are fixedly installed on the end of the extension plate close to the middle of the middle ring plate, and the sides of the plurality of elastic parts away from the extension plate are all connected to the surface of the pressure plate.

[0008] As a further improvement of the present technical solution, the pressurized injection mechanism includes an injection tube installed in the injection port of the fixed mold body, the injection tube and the injection port are connected in a movable sealed manner, a gas injection head is fixedly connected to the side of the injection tube away from the injection port, a pressure sensor body is installed on the inner wall of the folding frame, and the pressure sensor body is located inside the sliding cavity.

[0009] As a further improvement of the present technical solution, the seal comprises two adsorption fixing rings, which are respectively mounted on the outer walls of the fixed mold body and the movable mold body, and a bullet pad is fixedly mounted between the two adsorption fixing rings, and the bullet pad is made of elastic material.

[0010] As a further improvement of the technical solution, the two adsorption fixing rings are both suction cup structures, which are used for adsorption and fixing on the surfaces of the fixed mold body and the movable mold body.

[0011] As a further improvement of the present technical solution, four limiting cavities are opened on the inner wall of the middle ring plate, and the surfaces of the four extension plates close to the middle ring plate are fixedly connected with sliding rods, and the sliding rods are in a "cross" shape. The surfaces of the sliding rods fit the inner walls of the limiting cavities, and the surfaces of the sliding rods are connected to the inner walls of the limiting cavities through elastic rods.

[0012] As a further improvement of the technical solution, one end of the four pressure plates close to the middle ring plate is provided with a cutting surface.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the pressurized injection mold sealing detection device, the fixed support plate will provide a stable support for the fixed mold body. At the same time, the folding stand and the connecting rod work together to provide a stable support for the movable mold body. In this case, with the use of the seal, a good sealing environment can be achieved inside the cavity. During the continuous operation of the pressurized injection mechanism, once the amount of gas delivered exceeds the cavity capacity limit, the movable mold body will automatically slide to open the mold due to the movable connection between the movable mold body and the fixed mold body. At this time, the excess gas will be effectively stored by the seal. With the help of external force, the movable mold body is pushed to perform the mold closing operation again. During the mold closing process, the connecting rod can ensure the accuracy of the sliding mold closing of the movable mold body on the one hand, and on the other hand, it can produce a squeezing effect on the seal, so that the gas in the seal can flow back into the cavity as much as possible. After the mold closing is completed, the total gas delivery volume and the final amount of gas remaining in the seal are calculated to obtain the capacity of the cavity in the sealed state. In the subsequent use of the mold body, as long as the amount of gas injected does not exceed this capacity, the mold body can be guaranteed to maintain a sealed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall split structure of the present invention; Figure 2 This is a schematic diagram of the gas delivery structure inside the mold body of the present invention; Figure 3 It is a schematic structural diagram of the mold body in the mold opening state after gas delivery of the present invention; Figure 4 It is a schematic diagram of the gas flow structure when the movable mold body of the present invention is slidably clamped; Figure 5 It is a schematic diagram of the supporting mechanism structure of the present invention; Figure 6 A side view of the mold body of the present invention during testing; Figure 7 For the present invention Figure 2 A schematic diagram of the structure at A; Figure 8 For the present invention Figure 4 Schematic diagram of the structure at point B.

[0015] The meaning of each number in the figure is: 1. Mold body; 11. Fixed mold body; 12. Movable mold body; 13. Cavity; 2. Detection component; 21. Support mechanism; 22. Pressurized injection mechanism; 23. Sealing member; 211, folding stand; 212, fixed support plate; 213, middle ring plate; 214, connecting rod; 2141, extension plate; 2142, elastic member; 2143, pressing plate; 215, sliding cavity; 221. Gas injection head; 222. Pressure sensor body; 223. Injection pipe; 231, adsorption fixing ring; 232, bullet pad; 3. Limiting cavity; 31. Sliding rod; 4. Draw the section. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0017] See also Figure 1 and Figure 2 As shown, the purpose of this embodiment is to provide a pressurized injection mold sealing detection device, including a detection component 2, the detection component 2 includes a support mechanism 21, the internal support of the support mechanism 21 is placed with a mold body 1, the mold body 1 includes a fixed mold body 11 and a movable mold body 12, and the fixed mold body 11 and the movable mold body 12 are molded together to form a cavity 13.

[0018] A seal 23 is adsorbed on the outer wall of the joint between the fixed mold body 11 and the movable mold body 12, and a pressurized injection mechanism 22 is sealed and installed at the injection port of the fixed mold body 11, and the other side of the pressurized injection mechanism 22 is installed on the inner wall of the support mechanism 21; in the process of the pressurized injection mechanism 22 injecting gas into the interior of the cavity 13, the seal 23 is used to assist the cavity 13 to maintain a sealed state. With the continuous operation of the pressurized injection mechanism 22, the volume in the cavity 13 is excessive, and the movable mold body 12 slides to open the mold. At this time, the seal 23 is used to retain the gas leaked during the mold opening. In the process of the movable mold body 12 opening the mold, the pressurized injection mechanism 22 receives the extrusion force and stops. Subsequently, the movable mold body 12 slides in the opposite direction to close the mold. At the same time, the support mechanism 21 can squeeze the seal 23, forcing the gas in the seal 23 to flow back into the cavity 13. By calculating the amount of gas injected by the pressurized injection mechanism 22 and the amount of gas in the seal 23, the capacity value of the cavity 13 in a sealed state can be obtained.

[0019] Before testing the sealing of the mold body 1, it is necessary to support the fixed mold body 11 and the movable mold body 12 through the support mechanism 21 and keep them in a mold-closed state. The specific structure of the support mechanism 21 is disclosed below. The support mechanism 21 includes a folding frame 211. The folding frame 211 is an "L"-shaped structure. A middle ring plate 213 is fixedly installed on one end of the folding frame 211. A sliding cavity 215 is formed between the middle ring plate 213 and the folding frame 211. The end of the middle ring plate 213 away from the sliding cavity 215 is movably connected with a fixed support plate 212. The fixed support plate 212 is a hollow structure for supporting the fixed mold body 11. Four groups of connecting rods 214 are slidably provided on the inner wall of the middle ring plate 213. The four groups of connecting rods 214 cooperate with each other to support the movable mold body 12. The ends of the four groups of connecting rods 214 away from the middle ring plate 213 are all located inside the sliding cavity 215.

[0020] The four groups of connecting rods 214 all include an extension plate 2141, and the end of the extension plate 2141 close to the sliding cavity 215 is in a bent state. A plurality of elastic members 2142 are fixedly installed on the end of the extension plate 2141 close to the middle of the middle ring plate 213, and the side of the plurality of elastic members 2142 away from the extension plate 2141 is connected to the surface of the pressure plate 2143.

[0021] See also Figure 2 Combined with Figure 5As shown, the fixed support plate 212 is a hollow structure, and its inner wall is equipped with a non-slip fixed pad (made of elastic material, such as rubber material), so that the fixed mold body 11 can be firmly supported. Then, four sets of connecting rods 214 are used to clamp and support the movable mold body 12. After the extension plate 2141 of the connecting rod 214 is tightly fitted with the surface of the movable mold body 12, the supporting effect of the movable mold body 12 can be effectively improved. After that, the fixed support plate 212 and the middle ring plate 213 are snap-fitted and assembled, so that the mold closing operation of the movable mold body 12 and the fixed mold body 11 can be realized, and the inside of the cavity 13 is in a sealed state.

[0022] Among them, multiple connecting rods fixedly installed on the surface of the fixed support plate 212 cooperate with the buckles set on the surface of the middle ring plate 213 to achieve snap-on installation. Specifically, when performing the installation operation, align the connecting rods on the fixed support plate 212 with the corresponding buckle positions on the surface of the middle ring plate 213, and then apply a certain force to insert the connecting rods into the buckles. The shape of the connecting rods and the internal structure of the buckles fit each other, thereby forming a stable snap-on connection. In this way, the fixed support plate 212 and the middle ring plate 213 are firmly connected together, thereby ensuring the stability and reliability of the sealing state in the cavity 13 after the movable mold body 12 and the fixed mold body 11 are molded together. It should be noted that when testing different mold bodies 1, the size of the appropriate support mechanism 21 can be selected according to the size of the mold body 1 to be tested.

[0023] After the mold body 1 that needs to be inspected is installed, the inspection gas is injected into the cavity 13 through the pressurized injection mechanism 22 to detect the sealing inside the cavity 13. The specific structure of the pressurized injection mechanism 22 is disclosed below. The pressurized injection mechanism 22 includes an injection tube 223 installed in the injection port of the fixed mold body 11. The injection tube 223 and the injection port are connected in a movable sealed manner. A gas injection head 221 is fixedly connected to the side of the injection tube 223 away from the injection port. A pressure sensor body 222 is installed on the inner wall of the folding stand 211. The pressure sensor body 222 is located inside the sliding cavity 215.

[0024] Combination Figure 3It can be seen that the injection pipe 223 is installed in the injection port of the fixed mold body 11 in a plug-in manner, and the two are sealed, thereby ensuring that the gas delivered by the gas injection head 221 can smoothly enter the cavity 13 in a sealed state. Since the extension plate 2141 can slide on the inner wall of the middle ring plate 213, and the movable mold body 12 and the fixed mold body 11 are movably fitted, once the gas delivered by the gas injection head 221 is excessive and exceeds the bearing range of the cavity 13, the movable mold body 12 will slide inside the sliding cavity 215, thereby realizing the sliding mold opening operation. When the movable mold body 12 slides to open the mold, its position changes, and the outer wall of the movable mold body 12 will be squeezed to the pressure sensor body 222 installed in the sliding cavity 215. Subsequently, the pressure sensor body 222 transmits a signal to the gas injection head 221, and the gas injection head 221 immediately stops delivering gas and calculates the total amount of gas delivered.

[0025] The working principle of the pressure sensor body 222 is well known to those skilled in the art. Based on the characteristics of the pressure sensitive element, when the movable mold 12 slides to open the mold and squeezes the pressure sensor body 222, the pressure sensitive element will be deformed. This deformation will cause its electrical characteristics (such as resistance, capacitance, inductance, etc.) to change. There is a certain functional relationship between the change of these electrical characteristics and the pressure. Through the internal signal conversion circuit, the pressure sensor body 222 converts this change of electrical characteristics into a recognizable electrical signal, and then transmits this electrical signal to the gas injection head 221, so that the gas injection head 221 receives an instruction to stop delivering gas to achieve control of the gas delivery process. It should be particularly noted that after the pressure sensor body 222 is deformed and transmits an electrical signal once, it will not automatically resume the working state because the movable mold 12 is away from the pressure sensor body 222. Only when the gas injection head 221 is reopened will the pressure sensor body 222 be activated again, so that it can respond to the pressure change of the movable mold 12 and transmit signals again.

[0026] When conducting sealing inspection on the mold body 1, liquid inspection is abandoned and gas inspection is used. The key reason is that the gas will not produce bubble interference during the transportation process, thereby effectively avoiding the detection error caused by the existence of bubbles. On the other hand, the gas molecules have large distances and strong fluidity, which can better penetrate into the tiny gaps and complex structures of the mold, and more comprehensively detect potential leakage points, thereby ensuring that the test results have higher accuracy and reliability, which is more conducive to accurately judging the sealing condition of the mold body 1.

[0027] When the amount of gas exceeds the bearing range of the cavity 13, the movable mold body 12 will slide to open the mold. At this time, the gas will leak out from the parting surface. In view of this, the gas can be retained by the seal 23. The specific structure of the seal 23 is disclosed below. The seal 23 includes two adsorption fixing rings 231, and the two adsorption fixing rings 231 are respectively installed on the outer walls of the fixed mold body 11 and the movable mold body 12. A hit pad 232 is fixedly installed between the two adsorption fixing rings 231. The hit pad 232 is made of elastic material (airbag material is preferably used). The two adsorption fixing rings 231 are both suction cup structures, which are used to be adsorbed and fixed on the surfaces of the fixed mold body 11 and the movable mold body 12.

[0028] Before installing the fixed mold body 11 and the movable mold body 12 inside the fixed support plate 212 and the middle ring plate 213, the two adsorption fixing rings 231 are first adsorbed and fixed on the outer walls of the fixed mold body 11 and the movable mold body 12 close to the parting surface, respectively. In this way, the center pad 232 between the two adsorption fixing rings 231 (the surfaces of the fixed mold body 11 and the movable mold body 12 close to the parting surface are designed without holes, so the adsorption fixing rings 231 can be stably adsorbed) can be located between the fitting surfaces of the fixed mold body 11 and the movable mold body 12, thereby achieving a preliminary fixing effect on the fixed mold body 11 and the movable mold body 12, and achieving a preliminary sealing of the cavity 13, such as Figure 2 As shown, after the fixed mold body 11 and the movable mold body 12 are installed inside the supporting mechanism 21, the air in the cavity 13 is evacuated with the help of the injection port. At the same time, the surface of the hit pad 232 is squeezed and fixed by the pressure plate 2143 (at this time, the hit pad 232 is in a flat state and there is no gas inside it).

[0029] See also Figure 3 As shown, after the gas injection head 221 delivers gas and causes the gas volume to exceed the bearing range of the cavity 13, the movable mold body 12 will slide to open the mold. At this moment, the gas in the cavity 13 will flow out from the parting surface. Since one of the adsorption fixing rings 231 and the pressure plate 2143 will be displaced following the sliding of the movable mold body 12, the centering pad 232 will enter a stretched state. At the same time, combined with the gas flowing out of the cavity 13, the centering pad 232 will expand, thereby collecting excess gas. In this process, the fixed mold body 11 and the movable mold body 12 can always maintain a sealed state.

[0030] When the movable mold body 12 slides to open the mold and touches the pressure sensor body 222, the gas injection head 221 stops the gas injection operation. Then, the movable mold body 12 is pushed by an external force (an external force of appropriate strength is selected according to the size of the mold body 1, such as a cylinder push or a manual method, etc.), so that the movable mold body 12 slides toward the fixed mold body 11, so that the mold closing operation is performed again. In the process of closing the movable mold body 12, the pressure plate 2143 can squeeze the expanded impact pad 232 with the help of the elastic member 2142, such as Figure 6 As shown, four pressure plates 2143 are respectively arranged on the surface of the center-shot pad 232. With the squeezing effect of the pressure plates 2143, part of the gas inside the center-shot pad 232 can flow toward the inside of the cavity 13. When the fixed mold body 11 and the movable mold body 12 are molded again, the gas inside the cavity 13 can reach a relatively saturated state.

[0031] After the mold closing operation is completed, the gas retained in the impact pad 232 is discharged through the output port (not shown in the figure), and the gas volume is accurately calculated. By combining this calculation result with the total gas delivery amount obtained by the previous test, the gas content of the cavity 13 in a relatively saturated state can be calculated. By repeating this test process many times, more reliable result data can be obtained. In this way, in the subsequent actual use of the mold body 1, as long as the gas injection amount does not exceed this determined value, it can ensure that the cavity 13 can achieve a good sealing effect without affecting the mold molding, thereby ensuring the normal use of the mold and the quality stability of the molded product.

[0032] Since the movement of the movable mold body 12 needs to be accurately guided and limited during the opening and closing process of the mold body 1, four limiting cavities 3 are opened on the inner wall of the middle ring plate 213, and the four extension plates 2141 are fixedly connected to the side surface of the middle ring plate 213. The sliding rod 31 is in a "cross" shape, and the surface of the sliding rod 31 fits the inner wall of the limiting cavity 3, and the surface of the sliding rod 31 is connected to the inner wall of the limiting cavity 3 by an elastic rod.

[0033] The improvements are: See Figure 8 As shown, four limiting cavities 3 are arranged on the inner wall of the middle ring plate 213, and the "cross" shaped slide bars 31 fixed on the four extension plates 2141 are tightly fitted with the inner walls of the limiting cavities 3. When the mold is closed, the connecting rod 214 can play a better role through the cooperation between the slide bars 31 and the limiting cavities 3. On the one hand, it can enhance the squeezing effect on the centering pad 232, so that the gas in the centering pad 232 can flow back smoothly. On the other hand, it can drive the movable mold body 12 and the fixed mold body 11 to close the mold accurately, and ensure the accuracy and sealing of the mold body 1. The elastic support of the elastic rod can ensure the stability of the installation position of the movable mold body 12.

[0034] During the mold closing process, it is necessary to ensure that the pressing plate 2143 can accurately and efficiently squeeze the center-shot pad 232 so that the gas in the center-shot pad 232 can smoothly flow back into the cavity 13 to achieve reasonable allocation of the gas in the cavity 13 and a good sealing effect of the mold. Therefore, the four pressing plates 2143 are each provided with a guide surface 4 at one end close to the center ring plate 213.

[0035] The improvement is: Figure 7 As shown, the guide surface 4 can play a guiding and positioning role when the pressure plate 2143 moves close to the center-shot pad 232 as the movable mold body 12 moves, so that the pressure plate 2143 can contact the center-shot pad 232 more accurately and gradually apply a uniform extrusion force, thereby reducing problems such as poor gas reflux or poor sealing caused by inaccurate extrusion position or uneven force, thereby effectively improving the stability and reliability of the mold during mold opening and closing and gas handling.

[0036] In summary, the working principle of this solution is as follows: before installing the fixed mold body 11 and the movable mold body 12 inside the fixed support plate 212 and the middle ring plate 213, firstly adsorb and fix the two adsorption fixing rings 231 on the outer walls of the fixed mold body 11 and the movable mold body 12 close to the parting surface, so that the centering pad 232 between the two adsorption fixing rings 231 can be located between the fitting surfaces of the fixed mold body 11 and the movable mold body 12, thereby achieving a preliminary fixing effect on the fixed mold body 11 and the movable mold body 12, and achieving a preliminary sealing of the mold cavity 13, and then, using the four sets of connecting rods 21 The movable mold body 12 is clamped and supported. After the extension plate 2141 of the connecting rod 214 is tightly fitted with the surface of the movable mold body 12, the supporting effect on the movable mold body 12 can be effectively improved. After that, the fixed support plate 212 and the middle ring plate 213 are snap-fitted and assembled, so that the mold closing operation of the movable mold body 12 and the fixed mold body 11 can be realized. After the fixed mold body 11 and the movable mold body 12 are installed inside the supporting mechanism 21, the air in the cavity 13 is evacuated by means of the injection port. At the same time, the surface of the centering pad 232 is squeezed and fixed by the pressing plate 2143.

[0037] After the gas injection head 221 delivers gas and causes the gas volume to exceed the bearing range of the cavity 13, the movable mold body 12 will slide to open the mold. At this moment, the gas in the cavity 13 will flow out from the parting surface. Since one of the adsorption fixing rings 231 and the pressure plate 2143 will be displaced following the sliding of the movable mold body 12, the center pad 232 will enter a stretched state. At the same time, combined with the gas flowing out of the cavity 13, the center pad 232 will expand, thereby collecting excess gas.

[0038] When the movable mold body 12 slides to open the mold and touches the pressure sensor body 222, the gas injection head 221 stops the gas injection operation, and then pushes the movable mold body 12 through external force to make the movable mold body 12 slide toward the fixed mold body 11, so as to perform the mold closing operation again. In the process of the movable mold body 12 closing the mold, the pressure plate 2143 can squeeze the expanded center pad 232 with the help of the elastic member 2142. With the squeezing effect of the pressure plate 2143, part of the gas inside the center pad 232 can flow toward the inside of the cavity 13. When the fixed mold body 11 and the movable mold body 12 are closed again, the gas inside the cavity 13 can reach a relatively saturated state.

[0039] After the mold closing operation is completed, the gas retained in the centering pad 232 is discharged through the output port, and the gas volume is accurately calculated. By combining this calculation result with the total gas delivery amount obtained by the previous test, the gas content of the cavity 13 in a relatively saturated state can be calculated. By repeating this test process many times, more reliable result data can be obtained. In this way, in the subsequent actual use of the mold body 1, as long as the gas injection amount does not exceed this determined value, it can ensure that the cavity 13 can achieve a good sealing effect without affecting the mold molding, thereby ensuring the normal use of the mold and the quality stability of the molded product.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressurized injection mold sealing detection device, comprising a detection component (2), characterized in that: The detection assembly (2) comprises a support mechanism (21), a mold body (1) is placed on the support mechanism (21), the mold body (1) comprises a fixed mold body (11) and a movable mold body (12), and the fixed mold body (11) and the movable mold body (12) are molded together to form a mold cavity (13); A sealing member (23) is adsorbed on the outer wall of the joint between the fixed mold body (11) and the movable mold body (12), a pressurized injection mechanism (22) is sealed and installed at the injection port of the fixed mold body (11), and the other side of the pressurized injection mechanism (22) is installed on the inner wall of the support mechanism (21); During the process of the pressurized injection mechanism (22) injecting gas into the cavity (13), the sealing member (23) is used to assist the cavity (13) in maintaining a sealed state. As the pressurized injection mechanism (22) continues to operate, the volume in the cavity (13) becomes excessive, and the movable mold body (12) slides to open the mold. At this time, the sealing member (23) is used to retain the gas leaked during the mold opening. During the process of the movable mold body (12) opening the mold, the pressurized injection mechanism (22) receives the squeezing force and stops. Subsequently, the movable mold body (12) slides in the opposite direction to close the mold. At the same time, the support mechanism (21) can squeeze the sealing member (23) to force the gas in the sealing member (23) to flow back into the cavity (13). By calculating the volume of gas injected by the pressurized injection mechanism (22) and the volume of gas in the sealing member (23), the volume value of the cavity (13) in a sealed state can be obtained.

2. The pressurized injection mold sealing detection device according to claim 1 is characterized in that: The support mechanism (21) comprises a folding frame (211), the folding frame (211) is an "L"-shaped structure, a middle ring plate (213) is fixedly mounted on one end of the folding frame (211), a sliding cavity (215) is formed between the middle ring plate (213) and the folding frame (211), one end of the middle ring plate (213) away from the sliding cavity (215) is movably connected to a fixed support plate (212), the fixed support plate (212) is a hollow structure, and is used to support the fixed mold body (11), four groups of connecting rods (214) are slidably arranged on the inner wall of the middle ring plate (213), the four groups of connecting rods (214) cooperate with each other to support the movable mold body (12), and the ends of the four groups of connecting rods (214) away from the middle ring plate (213) are all located inside the sliding cavity (215).

3. The pressurized injection mold sealing detection device according to claim 2 is characterized in that: The four groups of connecting rods (214) all include an extension plate (2141), one end of the extension plate (2141) close to the sliding cavity (215) is in a bent state, and one end of the extension plate (2141) close to the middle of the middle ring plate (213) is fixedly mounted with a plurality of elastic members (2142), and the sides of the plurality of elastic members (2142) away from the extension plate (2141) are all connected to the surface of the pressure plate (2143).

4. The pressurized injection mold sealing detection device according to claim 2 is characterized in that: The pressurized injection mechanism (22) comprises an injection tube (223) installed in the injection port of the fixed mold body (11); the injection tube (223) and the injection port are movably sealed and connected; a gas injection head (221) is fixedly connected to the side of the injection tube (223) away from the injection port; a pressure sensor body (222) is installed on the inner wall of the folding stand (211); and the pressure sensor body (222) is located inside the sliding cavity (215).

5. The pressurized injection mold sealing detection device according to claim 1, characterized in that: The sealing member (23) comprises two adsorption fixing rings (231), the two adsorption fixing rings (231) being respectively mounted on the outer walls of the fixed mold body (11) and the movable mold body (12), and a strike pad (232) being fixedly mounted between the two adsorption fixing rings (231), the strike pad (232) being made of elastic material.

6. The pressurized injection mold sealing detection device according to claim 5 is characterized in that: The two adsorption fixing rings (231) are both suction cup structures, and are used to be adsorbed and fixed on the surfaces of the fixed mold body (11) and the movable mold body (12).

7. The pressurized injection mold sealing detection device according to claim 3 is characterized in that: Four limiting cavities (3) are formed on the inner wall of the middle ring plate (213); a sliding rod (31) is fixedly connected to the surface of one side of the four extension plates (2141) close to the middle ring plate (213); the sliding rod (31) is in a "cross" shape; the surface of the sliding rod (31) fits the inner wall of the limiting cavity (3); and the surface of the sliding rod (31) and the inner wall of the limiting cavity (3) are connected via an elastic rod.

8. The pressurized injection mold sealing detection device according to claim 3 is characterized in that: The four pressing plates (2143) are each provided with a guide cutting surface (4) at one end close to the middle ring plate (213).

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