A molding cooling and pressure-maintaining device for plastic mold processing

Abstract

The present application relates to the field of injection molding technology, and specifically discloses a molding cooling and pressure-maintaining device for plastic mold processing, including a lower sealing plate and a top plate, as well as a lower mold plate and an upper mold plate located between the lower sealing plate and the top plate, and also includes: an injection device capable of docking to the injection hole of the top plate top tube; a part of the boosting mechanism is arranged on the injection device and can move synchronously with the injection device, and another part of the boosting mechanism is arranged on the top plate for generating a positive pressure environment; a compensation mechanism is arranged in the inner wall of the upper mold plate and is connected to the cavity between the upper mold plate and the lower mold plate, and a compensation material is stored in the compensation mechanism for providing shrinkage compensation when the cavity material cools and shrinks; wherein the positive pressure environment generated by the boosting mechanism can act on the compensation mechanism. The main purpose of the present invention is to achieve real-time monitoring and adjustment of the flow effect of the compensation material.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a molding cooling and pressure-maintaining device for plastic mold processing. Background Art

[0002] With the continuous advancement of plastic molding technology, the requirements for mold cooling and pressure holding technology are becoming increasingly higher. In the traditional plastic mold processing process, the material often shrinks during the cooling process, resulting in insufficient dimensional accuracy and surface defects in the molded parts. Existing technologies mostly rely on springs (such as CN201310633978.7) or independent drive devices (such as CN202211404721.X) to apply thrust to achieve additional compensation effects for the material. However, the above technologies have certain limitations in terms of control accuracy and response speed, and also require active control and adjustment, which may lead to unstable molding quality and increase production costs. Therefore, the development of an efficient and reliable molding cooling and pressure holding device that can monitor and adjust the flow of compensation materials in real time has become a key issue that needs to be urgently addressed in the current technical field. Summary of the Invention

[0003] An embodiment of the present application provides a molding cooling and pressure-maintaining device for plastic mold processing, the main purpose of which is to achieve real-time monitoring and adjustment of the flow effect of the compensation material.

[0004] To achieve the above objectives, an embodiment of the present application provides a molding cooling and pressure-maintaining device for plastic mold processing, comprising a lower sealing plate and a top plate, and a lower mold plate and an upper mold plate located between the lower sealing plate and the top plate, and further comprising:

[0005] An injection device capable of docking into the injection hole of the top plate top pipe;

[0006] a boosting mechanism, a portion of which is disposed on the injection device and is capable of synchronously moving with the injection device, and another portion of which is disposed on the top plate and is used to generate a positive pressure environment;

[0007] A compensation mechanism is provided in the inner wall of the upper template and is in communication with the cavity between the upper template and the lower template. The compensation mechanism stores compensation material for providing shrinkage compensation when the cavity material cools and shrinks.

[0008] The positive pressure environment generated by the boosting mechanism can act within the compensation mechanism.

[0009] In a feasible embodiment, the boosting mechanism includes: a fixing kit, fixedly mounted on the outer wall of the injection device; a force-applying member, fixedly arranged below the fixing kit, the force-applying member is located on the side of the injection device and located above the injection hole; a piston cylinder, fixedly arranged on the top of the top plate; a piston block, which is movable along the moving direction of the injection device and is arranged in the inner cavity of the piston cylinder, the top of the piston block protrudes from the outside of the top of the piston cylinder and corresponds to the position of the force-applying member; a sealing ring, which is mounted on the outer wall of the piston block and tightly fits against the inner wall of the piston cylinder; a spring, which is arranged in the inner cavity of the piston cylinder, and the top of the spring abuts against the bottom end face of the piston block.

[0010] In a feasible embodiment, the boosting mechanism also includes: a force-bearing member, which is telescopically arranged at the top of the piston block, and is used to contact the bottom end of the force-applying member; and a one-way valve, which is fixedly arranged on the air outlet end of the bottom end of the piston cylinder.

[0011] In a feasible embodiment, the compensation mechanism includes: a positive pressure air storage pipeline, located in the inner wall of the upper template, one end of the positive pressure air storage pipeline is connected to the air outlet end below the piston cylinder; at least one compensation part, connected to the bottom of the positive pressure air storage pipeline, and the compensation part is also connected to the mold cavity; a sensing part is arranged in a one-to-one correspondence with the compensation part, the top end of the sensing part is connected to the side of the compensation part, and the bottom end of the sensing part is connected to the inner cavity of the mold cavity; the sensing part is used to sense the cooling and shrinkage state of the material in the mold cavity; a blocking part is arranged in the sensing part, and the blocking part blocks the inner side of the compensation part in the first state, blocking the connection between the compensation part and the positive pressure air storage pipeline; the blocking part releases the blocking state between the compensation part and the positive pressure air storage pipeline in the second state.

[0012] In a feasible embodiment, the compensation part also includes: a branch positive pressure chamber, which is connected to the bottom of the positive pressure gas storage pipeline; a compensation chamber, which is arranged in the branch positive pressure chamber below the sealing part; and a pushing block, which can be moved vertically and is clamped in the compensation chamber, for pushing the compensation material entering the compensation chamber back into the mold cavity.

[0013] In a feasible embodiment, the sensing part includes: a monitoring cavity, which is opened in the inner wall of the upper template adjacent to the compensation cavity; an intercepting piece, which is sealed at the bottom end of the monitoring cavity, and the intercepting piece and the upper wall of the cavity are located in the same plane, and a plurality of air holes are opened through the intercepting piece; a connecting pipe, one end of which is connected to the inner cavity of the monitoring cavity, and the other end extends to the outside of the upper template and communicates with the external air.

[0014] In a feasible embodiment, the sealing part includes: a fixed ring, fixedly arranged in the inner cavity of the monitoring cavity; an elastic diaphragm, fixedly arranged on the inner side of the fixed ring, and dividing the monitoring cavity into a first section connected to the branch positive pressure cavity and a second section connected to the mold cavity, wherein the connecting pipe is connected to the first section in the monitoring cavity; an extension rod, one end of which is fixedly arranged in the middle position of the elastic diaphragm, and the other end extends into the branch positive pressure cavity; a sealing baffle, fixedly arranged on the end of the extension rod located in the branch positive pressure cavity.

[0015] In a feasible embodiment, the diameter of the middle portion of the compensation cavity is larger than the diameters at both ends, and the pusher block is located in the middle portion of the compensation cavity.

[0016] In a feasible implementation manner, the diameter of the monitoring cavity is smaller than the diameter of the branch positive pressure cavity.

[0017] In a feasible embodiment, two mold feet are provided on both sides of the top end of the lower sealing plate, and a lifting mechanism is provided between the two mold feet, and the lifting mechanism can be connected to the lower wall surface of the cavity.

[0018] The present application provides a molding cooling and pressure-maintaining device for plastic mold processing, which improves the compensation efficiency of the mold during the cooling process through the combination of an injection device, a boosting mechanism and a compensation mechanism; the boosting mechanism can automatically generate a positive pressure environment and provide strong compensation when the material cools and shrinks, thereby ensuring that the compensation material can smoothly enter the cavity and fill the gap caused by shrinkage; compared with traditional technologies, the present device no longer relies on additional elastic adjustment components or separate drive parts, simplifies the structural design and control difficulty, and improves the stability and accuracy of operation; in addition, the effective connection design between the compensation material stored in the compensation mechanism and the cavity makes the material flow in the entire process more natural and reliable, ultimately achieving the production of high-quality molded parts and reducing the scrap rate and rework costs that may be generated during the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The following is a schematic diagram showing the structure of a molding cooling and pressure-maintaining device for plastic mold processing provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the front cross-sectional structure of a molding cooling and pressure-maintaining device for plastic mold processing provided in an embodiment of the present application is shown;

[0021] Figure 3 Shown Figure 2 A magnified view of the local structure at point A;

[0022] Figure 4 Shown Figure 2 A magnified view of the local structure at point B in FIG;

[0023] Figure 5 A schematic diagram of the structure of the compensation mechanism provided in an embodiment of the present application is shown;

[0024] Figure 6 Shown Figure 5 A magnified view of the local structure at point C in the figure;

[0025] Figure 7 A schematic structural diagram of the blocking portion provided in an embodiment of the present application is shown.

[0026] In the figure: 10, lower sealing plate, 20, mold foot, 30, lifting mechanism, 40, lower template, 50, upper template, 60, top plate, 70, injection device, 80, boosting mechanism, 90, compensation mechanism, 71, injection hole, 81, fixing kit, 82, force member, 83, piston cylinder, 84, piston block, 85, sealing ring, 86, force member, 87, spring, 88, one-way valve, 91, positive pressure gas storage pipeline, 92, compensation part, 93, sensing part, 94, blocking part, 921, branch positive pressure chamber, 922, pushing block, 923, compensation chamber, 931, monitoring chamber, 932, intercepting plate, 933, connecting pipe, 941, fixing ring, 942, elastic diaphragm, 943, extension rod, 944, sealing baffle. DETAILED DESCRIPTION

[0027] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0028] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0029] See also Figures 1 to 7As shown, an embodiment of the present application provides a molding cooling and pressure-maintaining device for plastic mold processing, including a lower sealing plate 10 and a top plate 60, and a lower template 40 and an upper template 50 located between the lower sealing plate 10 and the top plate 60, and also includes: an injection device 70, a boosting mechanism 80 and a compensation mechanism 90, the injection device 70 can be docked to the injection hole 71 of the top tube of the top plate 60; a part of the boosting mechanism 80 is arranged on the injection device 70 and can move synchronously with the injection device 70, and another part of the boosting mechanism 80 is arranged on the top plate 60 for generating a positive pressure environment; the compensation mechanism 90 is arranged in the inner wall of the upper template 50 and is connected to the cavity located between the upper template 50 and the lower template 40, and the compensation material is stored in the compensation mechanism 90 for providing shrinkage compensation when the cavity material cools and shrinks; wherein the positive pressure environment generated by the boosting mechanism 80 can act on the compensation mechanism 90.

[0030] In the present application, a boosting mechanism 80 is provided on the injection device 70 and the top plate 60. The boosting mechanism 80 generates pressure by pressing and boosting. In the process of the injection molding device moving toward the mold, a positive pressure environment is generated with the help of this moving power, for example, a positive pressure cavity is formed and stored in the upper template 50. Then the injection device 70 starts to inject the molten material until the entire cavity is filled. Part of the molten material will also enter the compensation mechanism 90 connected to the cavity, and then the mold cooling link is started, such as using an oil cooling medium to circulate through the mold to evenly cool the cavity. In this process, the temperature of the material in the cavity drops and the overall shape will shrink slightly. Then the compensation mechanism 90 compensates the material into the cavity. The compensation position can be one, two or four places. It should be noted that since the compensation material stored in the compensation mechanism 90 is located outside the cavity, the compensation material will also cool down synchronously during the cooling process. Some technologies in the existing technology use a spring 87 to apply thrust, but they need to be combined with additional elastic adjustment components. Some technical solutions use separately configured drive parts to actively control the material thrust to make it enter the cavity for material compensation, but the accuracy is somewhat lacking. Improper control of the thrust effect may affect the shape quality of the internal material. Therefore, in the default state of this device, the natural flow of compensation material into the cavity can be used for material compensation. If the compensation material is difficult to enter the compensation position due to lower material temperature, poor fluidity or friction, the automatic pressure monitoring means of the compensation structure can be used to automatically release positive pressure gas at the right time, and the positive pressure will continue to be applied to the compensation material that fails to enter the cavity for strong compensation, thereby effectively ensuring that the compensation material is compensated in a long-lasting, gentle and effective manner to make up for the defects caused by profile shrinkage.

[0031] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, in some examples, further, the boosting mechanism 80 includes: a fixing kit 81, a force-applying member 82, a piston cylinder 83, a piston block 84, a sealing ring 85 and a spring 87, the fixing kit 81 is fixedly mounted on the outer wall of the injection device 70; the force-applying member 82 is fixedly arranged below the fixing kit 81, the force-applying member 82 is located on the side of the injection device 70, and is located on the upper part of the injection hole 71; the piston cylinder 83 is fixedly arranged on the top of the top plate 60; the piston block 84 is movable in the inner cavity of the piston cylinder 83 along the moving direction of the injection device 70, and the top of the piston block 84 protrudes from the outside of the top of the piston cylinder 83 and corresponds to the position of the force-applying member 82; the sealing ring 85 is mounted on the outer wall of the piston block 84 and fits tightly against the inner wall of the piston cylinder 83; the spring 87 is arranged in the inner cavity of the piston cylinder 83, and the top of the spring 87 abuts against the bottom end face of the piston block 84.

[0032] In this example, the boosting mechanism 80 generates a positive pressure environment by cooperating with a force-applying member 82, a piston cylinder 83, and a piston block 84. Specifically, the fixing kit 81 is firmly mounted on the outer wall of the injection device 70 to provide support and fixation for the force-applying member 82. The force-applying member 82 is located above the injection hole 71 and applies a thrust to the piston block 84 by following the movement of the injection device 70. The piston cylinder 83 forms a closed cavity and applies pressure. When the force-applying member 82 applies pressure, the piston block 84 is pushed downward, and the sealing ring 85 ensures that the piston block 84 and the piston A good seal is formed between the inner walls of the cylinder 83 to prevent gas leakage; the spring 87 is located in the piston cylinder 83, abutting against the bottom end of the piston block 84, providing an initial reset force, so that the piston block 84 can return to its initial position after the force is released; the entire process is driven by the force generated by the force-applying member 82, which drives the piston block 84 downward to generate positive pressure, and then transfers the gas to the compensation mechanism 90; the purpose is to ensure that the compensation material can flow into the cavity at the appropriate time and position, thereby improving the molding quality and material uniformity, and enhancing the overall reliability of the product.

[0033] like Figure 2 and Figure 3 As shown, in some examples, further, the boosting mechanism 80 also includes: a force-bearing member 86 and a one-way valve 88, the force-bearing member 86 is telescopically arranged at the top end of the piston block 84, and the force-bearing member 86 is used to contact the bottom end of the force-applying member 82; the one-way valve 88 is fixedly arranged on the air outlet end at the bottom end of the piston cylinder 83.

[0034] In this example, the boosting mechanism 80 further optimizes the efficiency and control effect of positive pressure generation through the force-bearing member 86 and the one-way valve 88; wherein, the force-bearing member 86 is installed at the top of the piston block 84, and can adjust the overall height of the piston block 84 and the force-bearing member 86 by telescopic adjustment, thereby achieving the effect of adjusting the boost pressure in a single acceptance; for example, a threaded structure can be screwed in, or a screw can be applied from the side to fix the extension of the force-bearing member 86 at the upper end of the piston block 84, thereby enhancing the flexibility of the boosting mechanism 80; the one-way valve 88 is fixed to the air outlet end at the bottom end of the piston cylinder 83 to ensure that during the boosting process, the gas can only be discharged from the inside of the piston cylinder 83 into the inner cavity of the upper template 50, and cannot flow in the opposite direction; avoiding the loss of the positive pressure environment and ensuring a stable positive air pressure state during the injection and cooling process.

[0035] like Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, in some examples, further, the compensation mechanism 90 includes: a positive pressure air storage pipeline 91, at least one compensation part 92, a sensing part 93 and a blocking part 94, the positive pressure air storage pipeline 91 is located in the inner wall of the upper template 50, and one end of the positive pressure air storage pipeline 91 is connected to the air outlet end below the piston cylinder 83; at least one compensation part 92 is connected to the bottom of the positive pressure air storage pipeline 91, and the compensation part 92 is also connected to the mold cavity; the sensing part 93 is arranged in a one-to-one correspondence with the compensation part 92, the top end of the sensing part 93 is connected to the side of the compensation part 92, and the bottom end of the sensing part 93 is connected to the inner cavity of the mold cavity; the sensing part 93 is used to sense the cooling and shrinkage state of the material in the mold cavity; the blocking part 94 is arranged in the sensing part 93, and the blocking part 94 is blocked on the inner side of the compensation part 92 in the first state, blocking the connection state between the compensation part 92 and the positive pressure air storage pipeline 91; the blocking part 94 releases the blocking state between the compensation part 92 and the positive pressure air storage pipeline 91 in the second state.

[0036] It should be noted that the setting of the compensation mechanism 90 ensures effective compensation during the cooling and shrinkage of the material; specifically, the positive pressure gas storage pipe 91 is embedded in the inner wall of the upper template 50 and connected to the air outlet end below the piston cylinder 83, serving as the compensation part 92 to provide a storage space for positive pressure gas; when the cavity material shrinks due to cooling, the compensation part 92 is connected to the cavity, and can quickly guide the positive pressure gas into the cavity to apply additional pressure to compensate for the shrinkage of the material; the sensing part 93 corresponds to the compensation part 92 one by one, and its top end is connected to the side of the compensation part 92, and the bottom end is connected to the inner cavity of the cavity, monitoring the cooling state of the material in the cavity in real time; this setting enables the sensing part 93 to accurately sense the degree of shrinkage of the material, thereby starting the strong pressure effect on the compensation material at the right time.

[0037] In addition, the blocking portion 94 is arranged inside the sensing portion 93 and has two states: in the first state, the blocking portion 94 blocks the inside of the compensation portion 92, blocking the gas flow between the compensation portion 92 and the positive pressure gas storage pipe 91, and avoiding unnecessary gas leakage; in this state, the material shrinkage in the cavity is normal, and the compensation material can also flow into the cavity naturally for material compensation, without the need for additional pressure to act on the cavity environment, thereby ensuring the molding effect of the material; in the second state, the compensation material may not be able to enter the cavity normally for compensation due to poor fluidity or friction between the mold and the mold. In this case, the blocking portion 94 is unblocked, allowing positive pressure gas to enter the compensation portion 92, applying additional pressure to the compensation material, thereby timely compensating for the material shrinkage caused by cooling in the cavity; therefore, the setting of the blocking portion 94 and the sensing portion 93 effectively improves the response speed and accuracy to the cooling and shrinkage of the material, ensures that the compensation material can quickly and appropriately fill the shrinkage space, significantly improves the quality and consistency of the molded parts, and solves the shortcomings of traditional technology in the material compensation process.

[0038] like Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, in some examples, further, the compensation part 92 also includes: a branch positive pressure chamber 921, a pushing block 922 and a compensation chamber 923, the branch positive pressure chamber 921 is connected to the bottom of the positive pressure gas storage pipe 91; the compensation chamber 923 is arranged in the branch positive pressure chamber 921 below the blocking part 94; the pushing block 922 can be moved in the vertical direction and is clamped in the compensation chamber 923, and is used to push the compensation material entering the compensation chamber 923 back into the mold cavity.

[0039] In this example, the purpose of the compensation part 92 is to realize the basic material compensation process, but it also has a structure that cooperates with the sensing part 93 and the blocking part 94; the branch positive pressure chamber 921 is located below the positive pressure gas storage pipeline 91, and is responsible for receiving the gas from the positive pressure gas storage pipeline 91, forming an effective positive pressure transmission environment, which can promote the transportation of the compensation material; the compensation chamber 923 is arranged in the branch positive pressure chamber 921 below the blocking part 94, which is specially used to store the compensation material to ensure that it can be released in time when needed; the pushing block 922 can move vertically in the compensation chamber 923, and its main function is to push The compensation material entering the compensation cavity 923 is pushed back into the mold cavity; when the material in the mold cavity cools and shrinks, the positive pressure gas enters the compensation cavity 923 through the branch positive pressure cavity 921, prompting the compensation material to fill the shrinking part of the mold cavity; the vertical movement of the pushing block 922 pushes the compensation material into the mold cavity through the action of the positive pressure gas, ensuring that the material can accurately fill the gap formed by shrinkage; ensuring that the defects caused by material shrinkage can be compensated in a timely and effective manner during the entire molding process, thereby improving the appearance quality and mechanical properties of the molded parts, and overcoming the defects caused by uneven material cooling in traditional technologies.

[0040] like Figure 4 、 Figure 5 and Figure 6 As shown, in some examples, further, the sensing part 93 includes: a monitoring cavity 931, an intercepting piece 932 and a connecting pipe 933, the monitoring cavity 931 is opened in the inner wall of the upper template 50 adjacent to the compensation cavity 923; the intercepting piece 932 is sealed at the bottom end of the monitoring cavity 931, the intercepting piece 932 and the upper wall of the cavity are located in the same plane, and a plurality of air holes are opened through the intercepting piece 932; one end of the connecting pipe 933 is connected to the inner cavity of the monitoring cavity 931, and the other end extends to the outside of the upper template 50, communicating with the external air.

[0041] In this example, it should be noted that the sensing unit 93 realizes real-time monitoring of the material status in the cavity; specifically, the monitoring cavity 931 is arranged in the inner wall of the upper template 50, and is communicated with the compensation cavity 923, and is responsible for collecting the pressure and gas information in the cavity. For example, when the material in the cavity shrinks, the pressure in the cavity drops, and the pressure in the pressure detection cavity will also be consistent with the pressure in the cavity, thereby achieving a monitoring effect; in addition, the interception piece 932 is sealed at the bottom end of the monitoring cavity 931 to ensure that the monitoring cavity 931 can accurately sense the gas dynamics in the cavity; the air vent runs through the interception piece 932, allowing It allows gas to flow, but effectively blocks liquid or solid materials from entering the monitoring cavity 931, thereby keeping the monitoring environment clean; the connecting pipe 933 connects the monitoring cavity 931 with the outside air, so that the air pressure in the monitoring cavity 931 and the external pressure produce a pressure difference, which can amplify the change of the material in the cavity after cooling with the help of the pressure difference, and is more conducive to sensing this change; thereby providing power for the position movement of the blocking part 94, ensuring that when the pressure of the cavity drops due to material cooling and shrinkage, strong compensation measures can be effectively implemented, solving the problem of untimely compensation caused by the inability to monitor the material status in real time in traditional technologies.

[0042] like Figure 4 and Figure 7 As shown, in some examples, further, the sealing portion 94 includes: a fixing ring 941, an elastic diaphragm 942, an extension rod 943 and a sealing baffle 944, the fixing ring 941 is fixedly arranged in the inner cavity of the monitoring cavity 931; the elastic diaphragm 942 is fixedly arranged on the inner side of the fixing ring 941, and divides the monitoring cavity 931 into a first interval connected to the branch positive pressure cavity 921 and a second interval connected to the mold cavity, wherein the connecting pipe 933 is connected to the first interval in the monitoring cavity 931; one end of the extension rod 943 is fixedly arranged in the middle position of the elastic diaphragm 942, and the other end extends into the branch positive pressure cavity 921; the sealing baffle 944 is fixedly arranged on the end of the extension rod 943 located in the branch positive pressure cavity 921.

[0043] In this example, the blocking portion 94 effectively controls the gas connection relationship between the compensation portion 92 and the branch positive pressure chamber 921; specifically, the fixing ring 941 is firmly installed in the monitoring chamber 931, providing fixed support for the elastic diaphragm 942; the elastic diaphragm 942 is tightly attached to the inner side of the fixing ring 941, dividing the monitoring chamber 931 into a first interval connected to the branch positive pressure chamber 921 and a second interval connected to the mold cavity. The first interval has the same pressure as the external environment, and the second interval has the same pressure as the pressure in the mold cavity. If the compensation material can be naturally compensated to the mold cavity, the pressure in the first interval and the second interval will be the same, and no pressure difference will be generated. Therefore, the elastic diaphragm 942 is in a planar state. When the compensation material fails to enter normally, When compensation is carried out in the cavity, the pressure in the cavity space drops, and the pressure changes in the first interval and the second interval form a pressure difference, and the elastic module deforms, especially the displacement change of the middle position of the elastic diaphragm 942 is most obvious. In addition, the middle position of the elastic diaphragm 942 is connected to the extension rod 943 and the sealing baffle 944; the elastic diaphragm 942 moves due to the internal and external pressure difference, and the extension rod 943 and the sealing baffle 944 move synchronously with the elastic diaphragm 942, and the movement of the sealing baffle makes the compensation part 92 and the branch positive pressure cavity 921 connected; the positive pressure gas flows to the push block 922, and the compensation material is forced to compensate for the gap caused by cooling shrinkage; thereby effectively solving the defect problem caused by uneven material cooling.

[0044] like Figure 4 As shown, in some examples, further, the diameter of the middle portion of the compensation cavity 923 is larger than the diameters at both ends, and the pusher block 922 is located in the area with the larger diameter in the compensation cavity 923 .

[0045] It can be understood that the middle diameter of the compensation cavity 923 is larger than the diameters at both ends, so that the push block 922 can move within a specified range within the compensation cavity 923, on the one hand avoiding the collection of excessive compensation material during the injection molding process, and on the other hand avoiding the push block 922 being pressed into the cavity.

[0046] like Figure 4 As shown, in some examples, further, the diameter of the monitoring cavity 931 is smaller than the diameter of the branch positive pressure cavity 921 .

[0047] It can also be understood that the diameter of the monitoring cavity 931 is smaller than the diameter of the branch positive pressure cavity 921. This design ensures that the monitoring cavity 931 can properly sense the changes in gas pressure in the cavity; since the diameter of the monitoring cavity 931 is smaller, it can more sensitively respond to the state of the cavity; when the material in the cavity cools and shrinks, the monitoring cavity 931 can quickly detect the change in pressure, making the gas pressure compensation mechanism more timely and implementing compensation actions before the material is formed.

[0048] like Figure 1 and Figure 2 As shown, in some examples, further, two mold feet 20 are provided on both sides of the top of the lower sealing plate 10, and a lifting mechanism 30 is provided between the two mold feet 20. The lifting mechanism 30 can be connected to the lower wall surface of the cavity. The lifting mechanism 30 can lift the molding material upward when needed to ensure smooth separation and removal of the mold after molding.

[0049] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or electronic device that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or electronic device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, commodity, or electronic device that includes the element.

[0050] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A molding cooling and pressure-maintaining device for plastic mold processing, comprising a lower sealing plate (10) and a top plate (60), and a lower mold plate (40) and an upper mold plate (50) located between the lower sealing plate (10) and the top plate (60), characterized in that: Also includes: An injection device (70) capable of docking into an injection hole (71) of the top pipe of the top plate (60); a boosting mechanism (80), a portion of which is disposed on the injection device (70) and is capable of moving synchronously with the injection device (70), and another portion of which is disposed on the top plate (60) and is used to generate a positive pressure environment; A compensation mechanism (90) is arranged in the inner wall of the upper mold plate (50) and is in communication with the mold cavity between the upper mold plate (50) and the lower mold plate (40); compensation material is stored in the compensation mechanism (90) and is used to provide shrinkage compensation when the mold cavity material cools and shrinks; The positive pressure environment generated by the pressure-boosting mechanism (80) can act within the compensation mechanism (90); The boosting mechanism (80) comprises: A fixing sleeve (81), the fixing sleeve being arranged on the outer wall of the injection device (70); A force applying member (82) is fixedly disposed below the fixing kit (81), the force applying member (82) being located on the side of the injection device (70) and above the injection hole (71); A piston cylinder (83) is fixedly mounted on the top of the top plate (60); a piston block (84) which is movable along the moving direction of the injection device (70) and is disposed in the inner cavity of the piston cylinder (83); the top end of the piston block (84) protrudes outside the top end of the piston cylinder (83) and corresponds to the position of the force applying member (82); A sealing ring (85) is sleeved on the outer wall of the piston block (84) and is tightly fitted on the inner wall of the piston cylinder (83); A spring (87) is disposed in the inner cavity of the piston cylinder (83), and the top end of the spring (87) abuts against the bottom end surface of the piston block (84); The compensation mechanism (90) comprises: A positive pressure gas storage pipeline (91) is located in the inner wall of the upper mold plate (50), and one end of the positive pressure gas storage pipeline (91) is connected to the gas outlet end below the piston cylinder (83); At least one compensation portion (92) is connected to the bottom of the positive pressure gas storage pipeline (91), and the compensation portion (92) is also connected to the mold cavity; The sensing part (93) is arranged in one-to-one correspondence with the compensation part (92), the top end of the sensing part (93) is connected to the side of the compensation part (92), and the bottom end of the sensing part (93) is communicated with the inner cavity of the cavity; the sensing part (93) is used to sense the cooling and shrinkage state of the material in the cavity; A blocking portion (94) is arranged in the sensing portion (93); in a first state, the blocking portion (94) blocks the inner side of the compensation portion (92) to block the connection between the compensation portion (92) and the positive pressure gas storage pipeline (91); in a second state, the blocking portion (94) releases the blocking state between the compensation portion (92) and the positive pressure gas storage pipeline (91).

2. A molding cooling and pressure-maintaining device for plastic mold processing according to claim 1, characterized in that: The boosting mechanism (80) further includes: A force-bearing member (86) is telescopically arranged at the top end of the piston block (84), and the force-bearing member (86) is used to contact the bottom end of the force-applying member (82); A one-way valve (88) is fixedly arranged on the gas outlet end at the bottom end of the piston cylinder (83).

3. The molding cooling and pressure-maintaining device for plastic mold processing according to claim 1, characterized in that: The compensation part (92) further includes: A branch positive pressure chamber (921) connected to the bottom of the positive pressure gas storage pipeline (91); A compensation chamber (923) disposed in the branch positive pressure chamber (921) below the blocking portion (94); The material pushing block (922) is vertically movable and clamped in the compensation cavity (923), and is used to push the compensation material that has entered the compensation cavity (923) back into the mold cavity.

4. A molding cooling and pressure-maintaining device for plastic mold processing according to claim 3, characterized in that: The sensing unit (93) comprises: A monitoring cavity (931) is provided in an inner wall of the upper template (50) adjacent to the compensation cavity (923); An interception piece (932) is sealed at the bottom end of the monitoring cavity (931), the interception piece (932) and the upper wall of the cavity are located in the same plane, and a plurality of air holes are formed through the interception piece (932); A connecting pipe (933) has one end connected to the inner cavity of the monitoring cavity (931) and the other end extending to the outside of the upper template (50) to communicate with the external air.

5. A molding cooling and pressure-maintaining device for plastic mold processing according to claim 4, characterized in that: The blocking portion (94) comprises: A fixing ring (941) fixedly disposed in the inner cavity of the monitoring cavity (931); an elastic diaphragm (942) fixedly disposed on the inner side of the fixing ring (941) and dividing the monitoring cavity (931) into a first section connected to the branch positive pressure cavity (921) and a second section connected to the mold cavity, wherein the connecting pipe (933) is connected to the first section in the monitoring cavity (931); An extension rod (943), one end of which is fixedly arranged at the middle position of the elastic diaphragm (942), and the other end of which extends into the branch positive pressure chamber (921); A sealing baffle (944) is fixedly disposed on the end of the extension rod (943) located inside the branch positive pressure chamber (921).

6. A molding cooling and pressure-maintaining device for plastic mold processing according to claim 4, characterized in that: The diameter of the middle portion of the compensation cavity (923) is larger than the diameters of the two ends, and the pusher block (922) is located in the middle portion of the compensation cavity (923).

7. A molding cooling and pressure-maintaining device for plastic mold processing according to claim 4, characterized in that: The diameter of the monitoring cavity (931) is smaller than the diameter of the branch positive pressure cavity (921).

8. The molding cooling and pressure-maintaining device for plastic mold processing according to claim 1, characterized in that: Two mold feet (20) are also provided on both sides of the top end of the lower sealing plate (10), and a lifting mechanism (30) is also provided between the two mold feet (20), and the lifting mechanism (30) can be connected to the lower wall surface of the cavity.

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