A vacuum vulcanization device and method

Abstract

The present invention provides a vacuum vulcanization device and method, belonging to the technical field of vulcanization equipment. The vacuum vulcanization device and method include a vulcanizer bottom plate; a lifting arm fixedly connected to the upper end of the vulcanizer bottom plate; a lifting table fixedly connected to the side end of the lifting arm; a vulcanization heating system fixedly connected to the side end of the vulcanization heating system; a lower template provided on the upper end of the vulcanizer bottom plate; a lower mold provided on the upper end of the lower template; an upper template provided on the lower side of the lifting table, and the lifting arm drives the upper template to move up and down; an upper mold provided on the lower end of the upper template. The lower mold and the upper mold define the final shape of the rubber product. The air pressure impact is gentle. When impacting the lower end of the valve flap, it can both demold multiple sealing rings from the mold through the valve flap and ensure the integrity of the valve flap, facilitating the collection of multiple sealing rings.

Description

Technical Field

[0001] The present invention belongs to the technical field of vulcanization equipment, and particularly relates to a vacuum vulcanization equipment and method. Background Art

[0002] In the prior art, a vulcanizer is a device used in the rubber and tire manufacturing industry, mainly for vulcanizing rubber products. Vulcanization is a process in which a rubber material reacts chemically with sulfur by heating and pressurization, which changes the physical properties of the rubber, making it stronger, more elastic and durable.

[0003] After retrieval, it is found that a vulcanizer with controllable demolding auxiliary force is disclosed in a Chinese patent with the authorization announcement number "CN111267271B", which includes an upper mold, a middle mold, a machine base, several vertical guiding columns connected to the machine base at the lower end, a lower clamping plate sleeved on the sliding columns, an upper clamping plate fixed at the upper end of the vertical guiding columns, and a lifting cylinder for driving the lower clamping plate to lift. A suspension seat is connected to each of the left and right ends of the lower clamping plate. An upper mold suspension column is suspended on the suspension seat through an upper mold suspension column part suspension block, and a middle mold suspension column is suspended through a middle mold suspension column part suspension block. The lower end of the upper mold suspension column is connected to the upper mold, and the lower end of the middle mold suspension column is connected to the middle mold. In the free state, the upper mold and the middle mold are separated in the vertical direction. A controllable demolding assistance mechanism is provided between the middle mold and the suspension seat. The present invention has the advantages that the middle mold can be disengaged from the upper mold by its own weight, and when it cannot be disengaged, the assistance mechanism can provide assistance, solving the problem of laboriousness in manually separating the middle mold from the upper mold during the production of existing rubber molds.

[0004] The above technical solution solves the problem of laboriousness in manually separating the middle mold from the upper mold during the production of existing rubber molds. In the prior art, in the plastic vulcanization process such as for sealing rings, the gap between the upper and lower molds of the vulcanizer is a very important parameter, which directly affects the quality of the product and the efficiency of the vulcanization process. This gap usually refers to the minimum distance that should exist between the upper mold and the lower mold in the closed state of the mold to ensure that rubber or other materials can be vulcanized under appropriate conditions. After the sealing ring is vulcanized, this gap will form a relatively thin "valve membrane" connecting multiple sealing ring products. The existence of the valve membrane facilitates the storage of multiple finished sealing rings and the transfer of multiple sealing rings to subsequent processing equipment. When demolding in the above technical solution, the finished product is pulled by mechanical force, which will cause the tearing of the valve membrane. The tearing of the valve membrane will cause burrs to be torn out on the surface of the sealing ring, and it is not convenient to collect and transfer multiple finished sealing rings after the valve membrane is torn. Summary of the Invention

[0005] The purpose of the present invention is to provide a vacuum vulcanization equipment, aiming to solve the problem in the prior art that the tearing of the valve during demoulding will cause burrs on the surface of the sealing ring, and it is inconvenient to collect and transport multiple finished sealing rings after the valve is torn.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A vacuum vulcanization device, comprising:

[0008] Vulcanizing machine bottom plate;

[0009] A lifting arm, the lifting arm is fixedly connected to the upper end of the bottom plate of the vulcanizer;

[0010] A lifting platform, the lifting platform is fixedly connected to the side end of the lifting arm;

[0011] A vulcanization heating system, wherein the vulcanization heating system is fixedly connected to a side end of the vulcanization heating system;

[0012] A lower template, wherein the lower template is disposed on the upper end of the bottom plate of the vulcanizing machine;

[0013] A lower mold, wherein the lower mold is opened at the upper end of the lower template;

[0014] An upper template, the upper template is arranged on the lower side of the lifting platform, and the lifting arm drives the upper template to move up and down;

[0015] An upper mold, the upper mold is opened at the lower end of the upper mold plate, and the lower mold and the upper mold define the final shape of the rubber product;

[0016] An expansion gap, the expansion gap is opened at the lower end of the upper mold plate, and the height of the expansion gap is the minimum distance that the lower mold and the upper mold should have when they are closed;

[0017] The demoulding mechanism is arranged at the lower side of the lower mold plate. After the vulcanization work is completed, the lifting arm drives the upper mold plate to lift up, and automatically pressurizes the demoulding mechanism at the lower side of the lower mold plate to form a pressure difference between the demoulding mechanism and the upper surface of the lower mold plate. The pressure difference blows the molded rubber product out of the lower mold to complete the automatic demoulding;

[0018] The booster mechanism includes a movable component and an air release component. The air release component is provided with two groups. The booster mechanism is provided on one side of the bottom plate of the vulcanizer and is respectively connected to the lifting platform and the demoulding mechanism. When the lifting arm drives the lower mold and the upper mold to close, a negative pressure is formed in the booster mechanism to suck out the air in the mold to form a vacuum environment. After the vulcanization work is completed, the booster mechanism is pressurized during the process of the lifting arm driving the upper mold to lift. The pressure difference blows the molded rubber product out of the lower mold to complete the automatic demoulding.

[0019] A telescopic mechanism is provided. The telescopic mechanism is arranged at the lower end of the lifting table and connected to the upper template. After the lower mold and the upper mold are closed, the lifting table continues to descend under the action of the telescopic mechanism to reduce the pressure in the pressurizing mechanism, thereby sucking out the residual air in the mold.

[0020] As a preferred embodiment of the present invention, the demolding mechanism includes a demolding pressure-increasing groove and multiple groups of air outlet components. Each group of air outlet components includes a demolding spring groove, an air outlet hole, a closed air hole, a closed air plate, a spring push plate, and a die-punching spring. The demolding pressure-increasing groove is opened in the bottom plate of the vulcanizer. The demolding spring groove is opened in the upper inner wall of the demolding pressure-increasing groove. The air outlet hole is opened in the upper inner wall of the demolding spring groove. The closed air hole is opened at the upper end of the lower template and is communicated with the vulcanization heating system. The spring push plate is slidably connected in the demolding spring groove and the air outlet hole. The spring push plate is fixedly connected to the lower inner wall of the demolding spring groove and the lower end of the spring push plate. The closed air plate is fixedly connected to the upper end of the spring push plate. The closed air plate matches the closed air hole.

[0021] As a preferred embodiment of the present invention, the diameters of the demolding spring groove and the air outlet hole are larger than the diameter of the spring push plate.

[0022] As a preferred embodiment of the present invention, the movable component includes a pneumatic adjustment cylinder, an adjustment groove, a pressure-regulating sliding plate, a pressurizing push rod, a connecting plate, and a pneumatic restoration hole. The pneumatic adjustment cylinder is fixedly connected to the upper end of the bottom plate of the vulcanizer. The adjustment groove is opened at the upper end of the pneumatic adjustment cylinder. The pressure-regulating sliding plate is slidably connected in the adjustment groove. The pressurizing push rod is fixedly connected to the upper end of the pressure-regulating sliding plate. The connecting plate is fixedly connected to the upper end of the lifting table and the upper end of the pressurizing push rod. The pneumatic restoration hole is opened in the inner wall of the adjustment groove.

[0023] As a preferred embodiment of the present invention, each group of air release components includes a connecting air hole, an air release cylinder, an air flow connecting pipe, an air release push plate, an air release hole, an air hole plug, and a plug hole spring. The air release cylinder is arranged in the pneumatic adjustment cylinder. The connecting air hole is opened in one side inner wall of the adjustment groove and one side end of the air release cylinder. The air flow connecting pipe is fixedly connected to one side end of the air release cylinder. The air release push plate is slidably connected in the air release cylinder. The air release hole is opened in one side end of the air release push plate. The air hole plug is fixedly connected to one side inner wall of the air release cylinder and slides in the air release hole. The plug hole spring is fixedly connected to one side end of the air release push plate and one side inner wall of the air release cylinder.

[0024] As a preferred embodiment of the present invention, the installation directions of the two groups of air release push plates, air release holes, air hole plugs, and plug hole springs are opposite.

[0025] As a preferred embodiment of the present invention, an air extraction groove is opened at the upper end of the lower template. One of the air flow connecting pipes is communicated with the air extraction groove, and the other air flow connecting pipe is communicated with the demolding pressure-increasing groove.

[0026] As a preferred embodiment of the present invention, sealing rings are fixedly connected to the upper ends of the pressure regulating slide plate and the air pressure regulating cylinder.

[0027] As a preferred embodiment of the present invention, the telescopic mechanism includes a lifting groove, a lifting push plate, a plurality of pressure springs, a lower abutting block, a catalytic heater, and a lower pressing cylinder. The lower pressing cylinder is fixedly connected to the lower end of the lifting table. The lifting groove is formed in the lower end of the lower pressing cylinder. The lifting push plate is slidably connected in the lifting groove. The upper template is fixedly connected to the lower end of the lifting push plate. A plurality of the pressure springs are fixedly connected to the upper end of the lifting push plate and the upper inner wall of the lifting groove. The lower abutting block is fixedly connected to the upper inner wall of the lifting groove. The catalytic heater is disposed in the lifting push plate.

[0028] As a vacuum vulcanization method of the present invention, it includes the following steps:

[0029] S1. First, place the unvulcanized rubber compound strip formed by plastic refining on the upper end of the lower template, and lay a plurality of strips at equal intervals to complete mold loading. Then, the lifting arm drives the lifting table to descend to complete mold closing. Through the telescopic mechanism, the lifting table can continue to descend after the mold closing is completed. During this process, the pressure regulating slide plate continuously moves downward in the regulating groove. At this time, the total amount of air in the space above the pressure regulating slide plate remains unchanged while the volume increases, causing the air pressure above the pressure regulating slide plate to decrease and forming a pressure difference between the front and back of one of the air release push plates. The pressure difference forms a pulling force on one of the air release push plates backward until the air release hole is disengaged from the air hole plug to open the channel of the air flow connecting pipe, and the residual air in the mold is sucked out through the negative pressure above the pressure regulating slide plate, so that the mold maintains a vacuum state during the vulcanization process;

[0030] S2. When the lifting table and the pressure regulating slide plate move to the bottommost position, the pressure regulating slide plate slides to the lower end of the air pressure restoration hole. At this time, external air flows into the regulating groove from the air pressure restoration hole, making the air pressure above the pressure regulating slide plate become a normal atmospheric pressure. The plugging spring pushes the air release push plate to close the air flow connecting pipe again until the vulcanization process ends;

[0031] S3. When the vulcanization process is completed, the lifting arm drives the lifting table to rise, and the pressure regulating slide plate also slides to the upper end of the air pressure restoration hole to seal the inside of the pressure increasing push rod again. As the pressure regulating slide plate rises, the air pressure inside the pressure increasing push rod increases, causing a pressure difference between the front and back of the other group of air release push plates. The pressure difference forms a thrust to push the air release push plate backward until the air release hole is disengaged from the air hole plug, thereby opening the air release cylinder. The high air pressure inside the pressure increasing push rod flows out through the pressure increasing push rod, and the air flow flowing out through the pressure increasing push rod blows the valve of the vulcanized plastic, thereby blowing out the vulcanized plastic from the mold to complete natural demolding.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. With this device, during the demolding process, pneumatic punching replaces traditional mechanical force demolding. The pneumatic punching force is gentle. When impacting the lower end of the valve, it can demold multiple sealing rings from the mold through the valve, and can also ensure the integrity of the valve, facilitating the collection of multiple sealing rings. Moreover, when separating the sealing ring from the valve, due to the integrity of the valve, burrs on the surface of the sealing ring can also be reduced.

[0034] 2. With this device, the air pressure in the adjustment groove is adjusted through a pressurization mechanism. By the lifting of the lifting table during the primary vulcanization operation, the air pressure can be reduced to extract the air in the mold, reducing internal bubbles in the finished product and improving product quality, and by pressurization to complete the demolding of the sealing ring finished product. These two functions increase the practicality of this device.

[0035] 3. With this device, both vacuum extraction and pressurized punching rely on the mechanical force of the lifting arm during the lifting of the closed mold, eliminating the need for additional demolding devices and vacuum extraction devices, reducing the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0037] Figure 1 is a three-dimensional structure diagram of the present invention;

[0038] Figure 2 is the first structural sectional view of the present invention;

[0039] Figure 3 is the second structural sectional view of the present invention;

[0040] Figure 4 is the third structural sectional view of the present invention;

[0041] Figure 5 is the first exploded structural sectional view of the present invention;

[0042] Figure 6 is the second exploded structural sectional view of the present invention;

[0043] Figure 7 is the third exploded structural sectional view of the present invention;

[0044] Figure 8 is the fourth structural sectional view of the present invention;

[0045] Figure 9 is of the present invention Figure 2 an enlarged view of part A;

[0046] Figure 10 is of the present inventionFigure 3 Enlarged view at position B in the figure;

[0047] Figure 11 For the present invention Figure 4 Enlarged view at position C in the figure;

[0048] Figure 12 For the present invention Figure 5 Enlarged view at position D in the figure;

[0049] Figure 13 For the present invention Figure 6 Enlarged view at position E in the figure;

[0050] Figure 14 For the present invention Figure 7 Enlarged view at position F in the figure.

[0051] In the figure: 1, vulcanizer bottom plate; 102, lifting arm; 103, vulcanization heating system; 104, lifting table; 105, lower template; 106, lower mold; 107, upper template; 108, expansion gap; 109, upper mold; 201, demolding pressure increasing groove; 202, demolding spring groove; 203, air outlet hole; 204, closed air hole; 205, closed air plate; 206, spring push plate; 207, die punching spring; 301, air pressure regulating cylinder; 302, regulating groove; 303, pressure regulating slide plate; 304, pressure increasing push rod; 305, connecting plate; 306, connecting air hole; 307, air release cylinder; 308, air flow connecting pipe; 309, air release push plate; 310, air release hole; 311, air hole plug; 312, plugging hole spring; 313, sealing ring; 314, air extraction groove; 315, air pressure restoration hole; 401, lifting groove; 402, lifting push plate; 403, pressing spring; 404, lower abutting block; 405, catalytic heater; 406, lower pressing cylinder. Specific embodiments

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] Embodiment 1

[0054] Please refer to Figures 1 - 14 , the present invention provides the following technical solutions:

[0055] A vacuum vulcanization device, comprising:

[0056] Vulcanizer bottom plate 1;

[0057] A lifting arm 102, the lifting arm 102 is fixedly connected to the upper end of the bottom plate 1 of the vulcanizer;

[0058] A lifting platform 104, the lifting platform 104 is fixedly connected to the side end of the lifting arm 102;

[0059] The vulcanization heating system 103 is fixedly connected to the side end of the vulcanization heating system 103;

[0060] The lower template 105 is provided at the upper end of the bottom plate 1 of the vulcanizing machine;

[0061] A lower mold 106, which is disposed at the upper end of the lower mold plate 105;

[0062] The upper template 107 is arranged at the lower side of the lifting platform 104, and the lifting arm 102 drives the upper template 107 to move up and down;

[0063] An upper mold 109, the upper mold 109 is opened at the lower end of the upper mold plate 107, and the lower mold 106 and the upper mold 109 define the final shape of the rubber product;

[0064] Expansion gap 108, which is opened at the lower end of the upper mold plate 107, and the height of the expansion gap 108 is the minimum distance between the lower mold 106 and the upper mold 109 when they are closed;

[0065] The demoulding mechanism is arranged at the lower side of the lower template 105. After the vulcanization work is completed, the lifting arm 102 drives the upper template 107 to lift up, and automatically pressurizes the demoulding mechanism at the lower side of the lower template 105 to form a pressure difference between the demoulding mechanism and the upper surface of the lower template 105. The pressure difference blows the molded rubber product out of the lower mold 106 to complete the automatic demoulding;

[0066] The booster mechanism includes a movable component and an air release component. The air release component is provided with two groups. The booster mechanism is provided on one side of the bottom plate 1 of the vulcanizer and is connected to the lifting platform 104 and the demoulding mechanism respectively. When the lifting arm 102 drives the lower mold 106 and the upper mold 109 to close, a negative pressure is formed in the booster mechanism to suck out the air in the mold to form a vacuum environment. After the vulcanization work is completed, the lifting arm 102 drives the upper mold plate 107 to lift, and the booster mechanism is pressurized. The pressure difference blows the molded rubber product out of the lower mold 106 to complete the automatic demoulding;

[0067] The telescopic mechanism is arranged at the lower end of the lifting platform 104 and connected to the upper mold plate 107. After the lower mold 106 and the upper mold 109 are closed, the lifting platform 104 continues to descend through the telescopic mechanism to reduce the pressure in the boosting mechanism, thereby sucking out the residual air in the mold.

[0068] In a specific embodiment of the present invention, the bottom plate 1 of the vulcanizer and the lifting arm 102 form the support structure of the entire machine, ensuring its stability and strength. The vulcanization heating system 103 is the heating system of the device and is electrically connected to the upper template 107 to heat and vulcanize the plastic strip in the mold. The lower template 105 and the upper template 107 are the upper and lower parts of the mold. When the lower template 105 and the upper template 107 are closed, the upper mold 109 in the upper half and the lower mold 106 in the lower half are closed to form the final outer shape mold of a rubber product. The lifting platform 104 is connected to the lifting arm 102, and the lifting arm 102 drives the lifting platform 104 to move up and down. The lifting platform 104 and the upper template 107 are connected by a telescopic mechanism. After the upper template 107 falls and closes with the lower template 105, the lifting platform 104 can be driven by the lifting arm 102 to continue to descend to pressurize the pressurizing mechanism. The expansion gap 108 is in the middle of the mold when the lower template 105 and the upper template 107 are closed, and is used to compensate for material expansion. During the vulcanization process, materials such as rubber may expand to a certain extent due to heating. An appropriate gap can provide space for this expansion, prevent material overflow or cause mold damage, and form a valve connected to the plastic finished product. The upper template 107 is connected to the heating output end of the vulcanization heating system 103. After the mold is closed, the heating component in the upper template 107 catalyzes the plastic vulcanization reaction. When performing the plastic vulcanization process, first place the unvulcanized rubber compound strip that has been plasticized and formed on the upper end of the lower template 105, and lay multiple strips at equal intervals to complete mold loading. Then the lifting arm 102 drives the lifting platform 104 to descend to complete mold closing. The telescopic mechanism enables the lifting platform 104 to continue to descend after the mold closing is completed. And during this process, the pressure regulating slide plate 303 continuously moves downward in the regulating groove 302. At this time, the total amount of air in the space above the pressure regulating slide plate 303 remains unchanged while the volume becomes larger, causing the air pressure above the pressure regulating slide plate 303 to decrease and creating a pressure difference between the front and back of one of the air release push plates 309. The pressure difference forms a backward pulling force on one of the air release push plates 309 until the air release hole 310 is disengaged from the air hole plug 311 to open the channel of the air flow connecting pipe 308, and the residual air in the mold is sucked out through the negative pressure above the pressure regulating slide plate 303 to keep the inside of the mold in a vacuum state during the vulcanization process. When the lifting platform 104 and the pressure regulating slide plate 303 move to the bottom end, the pressure regulating slide plate 303 slides to the lower end of the air pressure restoration hole 315. At this time, external air flows into the regulating groove 302 from the air pressure restoration hole 315, making the air pressure above the pressure regulating slide plate 303 become a normal atmospheric pressure. The plugging spring 312 pushes the air release push plate 309 to close the air flow connecting pipe 308 again until the vulcanization process ends. When the vulcanization process is completed, the lifting arm 102 drives the lifting platform 104 to rise, and the pressure regulating slide plate 303 also slides to the upper end of the air pressure restoration hole 315 to close the inside of the pressure increasing push rod 304 again. As the pressure regulating slide plate 303 rises, the air pressure in the pressure increasing push rod 304 increases, causing a pressure difference between the front and back of the other group of air release push plates 309,The pressure difference forms a thrust to push the air release push plate 309 backward until the air release hole 310 is disengaged from the air hole plug 311, thereby opening the air release cylinder 307. The high-pressure air in the boosting push rod 304 flows out through the boosting push rod 304, and the airflow flowing out through the boosting push rod 304 blows the vulcanized plastic valve, thereby blowing the vulcanized plastic out of the lower mold 106 to complete natural demolding.

[0069] For details, please refer to Figures 1 - 14 Specifically, please refer to. The demolding mechanism includes a demolding boosting groove 201 and multiple groups of air outlet components. Each group of air outlet components includes a demolding spring groove 202, an air outlet hole 203, a closed air hole 204, a closed air plate 205, a spring push plate 206, and a die punching spring 207. The demolding boosting groove 201 is opened in the bottom plate 1 of the vulcanizing machine. The demolding spring groove 202 is opened on the upper inner wall of the demolding boosting groove 201. The air outlet hole 203 is opened on the upper inner wall of the demolding spring groove 202. The closed air hole 204 is opened at the upper end of the lower template 105 and is connected to the vulcanizing heating system 103. The spring push plate 206 is slidably connected in the demolding spring groove 202 and the air outlet hole 203. The spring push plate 206 is fixedly connected to the lower inner wall of the demolding spring groove 202 and the lower end of the spring push plate 206. The closed air plate 205 is fixedly connected to the upper end of the spring push plate 206. The closed air plate 205 is matched with the closed air hole 204.

[0070] In this embodiment: The sealing air plate 205 matches the sealing air hole 204. The sealing air hole 204 is located at the lower end of the expansion gap 108 after the mold is closed. The valve flap during the plastic vulcanization process is formed at the upper ends of the sealing air hole 204 and the sealing air plate 205. The die spring 207 is always in a compressed state to pull the sealing air plate 205 to always seal the sealing air hole 204. The circular plate at the lower end of the spring push plate 206 is connected to the die spring 207, and the upper end is a round rod located in the air outlet hole 203 and connected to the sealing air plate 205. When the pressure in the demolding pressurization groove 201 is at normal pressure, the sealing air plate 205 seals the sealing air hole 204 and makes the upper surface of the lower template 105 a flat plane, facilitating the removal of the valve flap and the plastic product. When the lifting table 104 is lifted upward after the vulcanization work is completed, the air pressure in the demolding pressurization groove 201 is increased by the pressurization mechanism. The high air pressure forms an upward thrust on the lower end of the spring push plate 206 to lift the spring push plate 206 and the sealing air plate 205, and stretch the die spring 207. As the sealing air plate 205 is lifted, the thinner valve flap connected to the finished plastic is lifted upward, and the high-pressure air flowing out of the sealing air hole 204 blows the valve flap to complete the preliminary separation of the finished plastic from the lower mold 106. After this process, multiple vulcanized plastic products located in the lower mold 106 and connected to the valve flap are no longer adhered to the lower mold 106 and the lower template 105, facilitating the removal of the molded plastic. When the finished plastic is removed, the valve flap is separated from the vulcanized plastic part by the separation device. Since the vulcanized plastic product is not adhered to the mold during removal, its integrity after removal can be guaranteed, facilitating subsequent separation work and effectively reducing burrs.

[0071] For details, please refer to Figures 1 - 14 , the diameters of the demolding spring groove 202 and the air outlet hole 203 are larger than the diameter of the spring push plate 206.

[0072] In this embodiment: The diameter of the round rod at the upper end of the spring push plate 206 is smaller than the diameter of the air outlet hole 203, and the diameter of the circular plate at the lower end of the spring push plate 206 in contact with the die spring 207 is smaller than the diameter of the demolding spring groove 202, so that the spring push plate 206 cannot block the air hole. After the sealing air plate 205 is opened, the high-pressure air in the demolding pressurization groove 201 can flow out from the air outlet hole 203 and the demolding spring groove 202.

[0073] For details, please refer to Figures 1 - 14, the movable assembly includes a pneumatic adjusting cylinder 301, an adjusting groove 302, a pressure-regulating slide plate 303, a boosting push rod 304, a connecting plate 305, and a pneumatic restoration hole 315. The pneumatic adjusting cylinder 301 is fixedly connected to the upper end of the vulcanizer base plate 1. The adjusting groove 302 is opened at the upper end of the pneumatic adjusting cylinder 301. The pressure-regulating slide plate 303 is slidably connected within the adjusting groove 302. The boosting push rod 304 is fixedly connected to the upper end of the pressure-regulating slide plate 303. The connecting plate 305 is fixedly connected to the upper ends of the lifting platform 104 and the boosting push rod 304. The pneumatic restoration hole 315 is opened on the inner wall of the adjusting groove 302.

[0074] In this embodiment: The movable assembly is used to adjust the air pressure within the pneumatic adjusting cylinder 301. The pressure-regulating slide plate 303 is connected to the boosting push rod 304 and the connecting plate 305. The connecting plate 305 moves up and down with the lifting platform 104. Also, the boosting push rod 304 blocks the upper opening of the adjusting groove 302 to prevent air from flowing out of the upper opening of the adjusting groove 302. When the vulcanization process needs to be carried out, the lifting platform 104 descends to close the mold. At this time, the pressure-regulating slide plate 303 slides downward, and the upper opening of the adjusting groove 302 is blocked by the boosting push rod 304, and the lower part is blocked by the pressure-regulating slide plate 303. Therefore, during the downward movement of the pressure-regulating slide plate 303, the total amount of air in the adjusting groove 302 remains unchanged while the space becomes larger, causing a negative pressure to be formed within the adjusting groove 302. The negative pressure pulls the air release push plate 309 to open the connecting passage air flow connecting pipe 308 to suck out the remaining air after the mold is closed, ensuring a vacuum state when the plastic is subjected to high-temperature vulcanization. This continues until the pressure-regulating slide plate 303 slides to the bottom end of the adjusting groove 302. At this time, the pressure-regulating slide plate 303 is located below the pneumatic restoration hole 315. At this moment, external air flows into the adjusting groove 302 through the pneumatic restoration hole 315 to make the air pressure within the adjusting groove 302 return to a normal atmospheric pressure again. The air release push plate 309 is pushed by the hole-blocking spring 312 to reset and close the air flow connecting pipe 308 again. When the vulcanization work is completed, the pressure-regulating slide plate 303 is lifted, the air pressure within the adjusting groove 302 increases, and the air is squeezed by the pressure-regulating slide plate 303 into the demolding boosting groove 201 to complete the demolding of the plastic product. This continues until all the air above the pressure-regulating slide plate 303 is squeezed out when the pressure-regulating slide plate 303 slides to the uppermost end of the adjusting groove 302, providing a vacuum environment for the next vulcanization process.

[0075] Specifically, please refer to Figures 1 - 14, each set of air leakage components includes a connecting air hole 306, an air leakage cylinder 307, an air flow connecting pipe 308, an air leakage push plate 309, an air leakage hole 310, an air hole plug 311 and a hole plugging spring 312. The air leakage cylinder 307 is arranged inside the air pressure adjusting cylinder 301. The connecting air hole 306 is opened on one inner wall of the adjusting groove 302 and one end of the air leakage cylinder 307. The air flow connecting pipe 308 is fixedly connected to one end of the air leakage cylinder 307. The air leakage push plate 309 is slidably connected inside the air leakage cylinder 307. The air leakage hole 310 is opened on one end of the air leakage push plate 309. The air hole plug 311 is fixedly connected to one inner wall of the air leakage cylinder 307 and slides inside the air leakage hole 310. The hole plugging spring 312 is fixedly connected to one end of the air leakage push plate 309 and one inner wall of the air leakage cylinder 307.

[0076] In this embodiment: One ends of the two sets of air leakage components are both arranged on the inner wall of the adjusting groove 302 and communicate with the air inside the adjusting groove 302 through the connecting air hole 306, while the other ends are respectively connected to the air outlet component and the air extraction groove 314. The hole plugging spring 312 is used to make the air leakage push plate 309 press against one inner wall of the air leakage cylinder 307, and the air leakage push plate 309 will not move unless there is a change in air pressure. When the air leakage push plate 309 presses against the inner wall of the air leakage cylinder 307, the air leakage hole 310 and the air hole plug 311 are closed, and at this time, the air in the front and rear ends of the air leakage push plate 309 will not flow. When the air leakage push plate 309 moves until the air leakage hole 310 and the air hole plug 311 are out of contact, the air in the front and rear ends of the air leakage push plate 309 can be connected through the air leakage hole 310.

[0077] Specifically, please refer to Figure 11 , the installation directions of the two sets of air leakage push plates 309, air leakage holes 310, air hole plugs 311 and hole plugging springs 312 are opposite.

[0078] In this embodiment: The installation directions of the two sets of air leakage components are opposite, as shown in the attached Figure 11As shown in the figure, the air release push plate 309 located on the upper side abuts against the inner wall of the air release cylinder 307 near the side of the air flow connecting pipe 308. This air release component is used to extract the air in the mold. The air release push plate 309 on the lower side abuts against the inner wall of the air release cylinder 307 near the side of the connecting air hole 306. This air release component is used for demolding the finished product. When the air pressure in the adjustment groove 302 decreases, a pressure difference is generated on both the left and right sides of the two air release push plates 309. The pressure difference forms a pulling force on the air release push plate 309 to the left. Since the air release push plate 309 on the lower side abuts against the left inner wall of the air release cylinder 307 and cannot move, the decrease in the air pressure in the adjustment groove 302 will not affect the demolding mechanism. The air release push plate 309 on the upper side is pulled to the left by the low air pressure and squeezes the plugging spring 312 to contract, so that the opening of the air release hole 310 is opened. The air in the mold is sucked out by the negative pressure in the adjustment groove 302. As the pressure regulating slide plate 303 continues to slide downward, the space of the adjustment groove 302 increases, so that the air pressure in the mold continues to decrease to approach the vacuum state. When the air pressure in the adjustment groove 302 increases, the pressure difference forms a pushing force on the air release push plate 309 to the right. The air release push plate 309 on the upper side abuts against the right inner wall of the air release cylinder 307, keeping the air release hole 310 in a closed state all the time. The air release push plate 309 on the lower side is pushed to the right, and the high-pressure air in the adjustment groove 302 flows into the demolding booster groove 201 from the lower air release hole 310 to complete the demolding of the plastic finished product.

[0079] For details, please refer to Figures 1 - 14 , an air extraction groove 314 is opened at the upper end of the lower template 105. One of the air flow connecting pipes 308 is communicated with the air extraction groove 314, and the other air flow connecting pipe 308 is communicated with the demolding booster groove 201.

[0080] In this embodiment: The air extraction groove 314 is arranged on the outside of the lower template 105. When the upper template 107 and the lower template 105 are closed, the air extraction groove 314 is arranged inside the mold of the upper template 107 and the lower template 105. One side of the air flow connecting pipe 308 for extracting air is connected to the air release cylinder 307, and the other side is connected to the air extraction groove 314. When the air pressure in the adjustment groove 302 decreases, the air in the mold is extracted through the air flow connecting pipe 308. The air flow connecting pipe 308 of the other air release component is communicated with the demolding booster groove 201. When the air pressure in the adjustment groove 302 increases, the high air pressure in the demolding booster groove 201 flushes the plastic finished product out of the mold.

[0081] For details, please refer to Figures 1 - 14 , sealing rings 313 are fixedly connected to the upper ends of both the pressure regulating slide plate 303 and the air pressure regulating cylinder 301.

[0082] In this embodiment: The sealing ring 313 is used to seal the upper and lower channels of the adjustment groove 302 to prevent air leakage when the air pressure in the adjustment groove 302 increases or decreases.

[0083] For details, please refer toFigures 1 - 14 , the telescopic mechanism includes a lifting groove 401, a lifting push plate 402, a plurality of compression springs 403, a lower abutting block 404, a catalytic heater 405, and a lower pressing cylinder 406. The lower pressing cylinder 406 is fixedly connected to the lower end of the lifting table 104. The lifting groove 401 is opened at the lower end of the lower pressing cylinder 406. The lifting push plate 402 is slidably connected in the lifting groove 401. The upper template 107 is fixedly connected to the lower end of the lifting push plate 402. The plurality of compression springs 403 are all fixedly connected to the upper end of the lifting push plate 402 and the upper inner wall of the lifting groove 401. The lower abutting block 404 is fixedly connected to the upper inner wall of the lifting groove 401. The catalytic heater 405 is arranged in the lifting push plate 402.

[0084] In this embodiment: The lifting push plate 402 is connected to the upper end of the upper template 107 for supporting the lifting push plate 402. The catalytic heater 405 is a heating device for vulcanization work and is electrically connected to the vulcanization heating system 103. The catalytic heater 405 heats and catalyzes the vulcanization reaction in the mold during the plastic vulcanization process. When the lifting table 104 descends until the upper template 107 and the lower template 105 are closed, the mold is in a closed state. At this time, the lifting table 104 can continue to move downward to drive the pressure regulating slide plate 303 to move downward and reduce the air pressure in the regulating groove 302. As the lifting table 104 continues to descend, the compression springs 403 are compressed. The resilience of the compression springs 403 forms a thrust on the upper end of the lifting push plate 402 to ensure that the mold is always sealed during the vulcanization reaction until the lower abutting block 404 abuts against the upper end of the lifting push plate 402. At this time, the lifting table 104 can no longer move downward, and the pressure regulating slide plate 303 also descends to the bottom end of the regulating groove 302.

[0085] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vacuum vulcanization device, characterized in that: include: Vulcanizing machine bottom plate (1); A lifting arm (102), wherein the lifting arm (102) is fixedly connected to the upper end of the vulcanizing machine bottom plate (1); A lifting platform (104), wherein the lifting platform (104) is fixedly connected to a side end of the lifting arm (102); A vulcanization heating system (103), wherein the vulcanization heating system (103) is fixedly connected to a side end of the vulcanization heating system (103); A lower template (105), wherein the lower template (105) is disposed at an upper end of a bottom plate (1) of the vulcanizing machine; A lower mold (106), wherein the lower mold (106) is opened at the upper end of the lower mold plate (105); An upper template (107), wherein the upper template (107) is disposed on the lower side of the lifting platform (104), and the lifting arm (102) drives the upper template (107) to move up and down; An upper mold (109), wherein the upper mold (109) is opened at the lower end of the upper mold plate (107), and the lower mold (106) and the upper mold (109) define the final shape of the rubber product; An expansion gap (108), wherein the expansion gap (108) is opened at the lower end of the upper mold plate (107), and the height of the expansion gap (108) is the minimum distance that the lower mold (106) and the upper mold (109) should have when they are closed; A demoulding mechanism, wherein the demoulding mechanism is arranged at the lower side of the lower mold plate (105). After the vulcanization work is completed, the lifting arm (102) drives the upper mold plate (107) to lift up, and automatically pressurizes the demoulding mechanism at the lower side of the lower mold plate (105) to form a pressure difference between the demoulding mechanism and the upper surface of the lower mold plate (105). The pressure difference blows the molded rubber product out of the lower mold (106) to complete the automatic demoulding; A pressurizing mechanism, the pressurizing mechanism comprising a movable component and an air-release component, the air-release component being provided with two groups, the pressurizing mechanism being provided at one side of the bottom plate (1) of the vulcanizer, and being respectively connected to the lifting platform (104) and the demoulding mechanism, when the lifting arm (102) drives the lower mold (106) and the upper mold (109) to close, negative pressure is formed in the pressurizing mechanism to suck out the air in the mold to form a vacuum environment, and after the vulcanization work is completed, the pressurizing mechanism is pressurized during the process of the lifting arm (102) driving the upper mold plate (107) to lift, and the pressure difference blows the molded rubber product out of the lower mold (106) to complete the automatic demoulding; The movable component comprises an air pressure regulating cylinder (301), an regulating groove (302), a pressure regulating slide plate (303), a boost push rod (304), a connecting plate (305) and an air pressure recovery hole (315); the air pressure regulating cylinder (301) is fixedly connected to the upper end of the vulcanizer bottom plate (1); the regulating groove (302) is opened at the upper end of the air pressure regulating cylinder (301); the pressure regulating slide plate (303) is slidably connected in the regulating groove (302); the boost push rod (304) is fixedly connected to the upper end of the pressure regulating slide plate (303); the connecting plate (305) is fixedly connected to the upper end of the lifting platform (104) and the upper end of the boost push rod (304); and the air pressure recovery hole (315) is opened at the inner wall of the regulating groove (302); Each of the air release components includes a connecting air hole (306), an air release cylinder (307), an air flow connecting pipe (308), an air release push plate (309), an air release hole (310), an air hole plug (311), and a hole plugging spring (312). The air release cylinder (307) is arranged inside the air pressure adjusting cylinder (301). The connecting air hole (306) is opened on one inner wall of the adjusting groove (302) and one end of the air release cylinder (307). The air flow connecting pipe (308) is fixedly connected to one end of the air release cylinder (307). The air release push plate (309) is slidably connected inside the air release cylinder (307). The air release hole (310) is opened on one end of the air release push plate (309). The air hole plug (311) is fixedly connected to one inner wall of the air release cylinder (307) and slides inside the air release hole (310). The hole plugging spring (312) is fixedly connected to one end of the air release push plate (309) and one inner wall of the air release cylinder (307). The installation directions of the two groups of air release push plates (309), air release holes (310), air hole plugs (311), and hole plugging springs (312) are opposite; An air extraction groove (314) is opened at the upper end of the lower template (105), and one of the air flow connecting pipes (308) is communicated with the air extraction groove (314); A telescopic mechanism is arranged at the lower end of the lifting table (104) and is connected to the upper template (107). After the lower die (106) and the upper die (109) are closed, the telescopic mechanism is used to make the lifting table (104) continue to descend to reduce the pressure inside the pressurizing mechanism, thereby sucking out the residual air in the die.

2. The vacuum vulcanization equipment according to claim 1, characterized in that: The demolding mechanism includes a demolding pressurizing groove (201) and multiple groups of air outlet components. Each group of air outlet components includes a demolding spring groove (202), an air outlet hole (203), a closed air hole (204), a closed air plate (205), a spring push plate (206), and a die punching spring (207). The demolding pressurizing groove (201) is opened in the bottom plate (1) of the vulcanizing machine, and the other air flow connecting pipe (308) is communicated with the demolding pressurizing groove (201). The demolding spring groove (202) is opened on the upper inner wall of the demolding pressurizing groove (201). The air outlet hole (203) is opened on the upper inner wall of the demolding spring groove (202). The closed air hole (204) is opened at the upper end of the lower template (105) and is communicated with the vulcanization heating system (103). The spring push plate (206) is slidably connected inside the demolding spring groove (202) and the air outlet hole (203). The spring push plate (206) is fixedly connected to the lower inner wall of the demolding spring groove (202) and the lower end of the spring push plate (206). The closed air plate (205) is fixedly connected to the upper end of the spring push plate (206), and the closed air plate (205) matches the closed air hole (204).

3. A vacuum vulcanization device according to claim 2, characterized in that: The diameters of the demolding spring groove (202) and the air outlet hole (203) are larger than the diameter of the spring push plate (206).

4. A vacuum vulcanization device according to claim 3, characterized in that: Sealing rings (313) are fixedly connected to the upper ends of the pressure regulating sliding plate (303) and the air pressure adjusting cylinder (301).

5. A vacuum vulcanization device according to claim 4, characterized in that: The telescopic mechanism includes a lifting groove (401), a lifting push plate (402), a plurality of compression springs (403), a lower abutting block (404), a catalytic heater (405) and a lower pressing cylinder (406). The lower pressing cylinder (406) is fixedly connected to the lower end of the lifting platform (104). The lifting groove (401) is formed in the lower end of the lower pressing cylinder (406). The lifting push plate (402) is slidably connected in the lifting groove (401). The upper template (107) is fixedly connected to the lower end of the lifting push plate (402). A plurality of the compression springs (403) are fixedly connected to the upper end of the lifting push plate (402) and the upper inner wall of the lifting groove (401). The lower abutting block (404) is fixedly connected to the upper inner wall of the lifting groove (401). The catalytic heater (405) is arranged in the lifting push plate (402).

6. A vacuum vulcanization method, characterized in that: Applying a vacuum vulcanization device as described in claim 5, includes the following steps: S1. First, place the unvulcanized rubber compound strip that has been plasticized and formed on the upper end of the lower template (105), and lay a plurality of strips with equal spacing to complete mold loading. Then, the lifting arm (102) drives the lifting platform (104) to descend to complete mold closing. Through the telescopic mechanism, the lifting platform (104) can continue to descend after the mold closing is completed. And during this process, the pressure regulating slide plate (303) continuously moves downward in the regulating groove (302). At this time, the total amount of air in the space above the pressure regulating slide plate (303) remains unchanged while the volume increases, causing the air pressure above the pressure regulating slide plate (303) to decrease and forming a pressure difference between the front and back of one of the air release push plates (309). The pressure difference forms a pulling force on one of the air release push plates (309) backward until the air release hole (310) is disengaged from the air hole plug (311) to open the channel of the air flow connecting pipe (308), and the residual air in the mold is sucked out through the negative pressure above the pressure regulating slide plate (303), so that the mold remains in a vacuum state during the vulcanization process; S2. When the lifting platform (104) and the pressure regulating slide plate (303) move to the bottommost position, the pressure regulating slide plate (303) slides to the lower end of the air pressure restoration hole (315). At this time, external air flows into the regulating groove (302) from the air pressure restoration hole (315), making the air pressure above the pressure regulating slide plate (303) become a normal atmospheric pressure. The plugging spring (312) pushes the air release push plate (309) to close the air flow connecting pipe (308) again until the vulcanization process ends; S3. After the vulcanization process is completed, the lifting arm (102) drives the lifting platform (104) to rise. The pressure regulating slide plate (303) also slides to the upper end of the air pressure restoration hole (315) to re-seal the inside of the supercharging push rod (304). As the pressure regulating slide plate (303) rises, the air pressure inside the supercharging push rod (304) increases, creating a pressure difference between the front and back of the other set of air release push plates (309). The pressure difference forms a thrust that pushes the air release push plate (309) backward until the air release hole (310) is disengaged from the air hole plug (311), thereby opening the air release cylinder (307). The high air pressure inside the supercharging push rod (304) flows out through the supercharging push rod (304). The airflow flowing out through the supercharging push rod (304) blows the valve of the vulcanized plastic, thereby blowing the vulcanized plastic out of the lower mold (106) to complete natural demolding.

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