Vacuum vulcanization equipment and method

Abstract

The invention provides vacuum vulcanization equipment and method, and belongs to the technical field of vulcanization equipment. The vacuum vulcanization equipment comprises a vulcanizing machine bottom plate; the lifting arm is fixedly connected to the upper end of the vulcanizing machine bottom plate; the lifting platform is fixedly connected to the side end of the lifting arm; the vulcanization heating system is fixedly connected to the side end of the vulcanization heating system; the lower mold plate is arranged at the upper end of the vulcanizing machine bottom plate; the lower mold is arranged at the upper end of the lower mold plate; 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; the upper mold is arranged at the lower end of the upper mold plate, the lower mold and the upper mold define the final appearance of the rubber product, the air pressure impact force is soft, when the lower end of the valve is impacted, the multiple sealing rings can be demolded from the mold through the valve, the integrity of the valve can be guaranteed, and the multiple sealing rings can be conveniently collected.

Description

Technical Field

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

[0002] In the prior art, a vulcanizer is a piece of equipment used in the rubber and tire manufacturing industry, mainly used to vulcanize rubber products. Vulcanization is the process of chemically reacting rubber materials with sulfur by applying heat and pressure, which changes the physical properties of the rubber, making it stronger, more elastic and durable.

[0003] After searching, it was found that a vulcanizing machine with controllable demoulding auxiliary force was disclosed in a Chinese patent with authorization announcement number "CN111267271B", including an upper mold, a middle mold, a machine base, a plurality of vertical guide columns connected to the machine base at the lower end, a lower clamping plate sleeved on a sliding column, an upper clamping plate fixedly connected to the upper end of the vertical guide column and a lifting cylinder for driving the lower clamping plate to lift and lower, a suspension seat is connected to the left and right ends of the lower clamping plate respectively, an upper mold suspension column is suspended on the suspension seat through an upper mold suspension column suspension block and a middle mold suspension column is suspended on the middle mold suspension column suspension block, the lower end of the upper mold suspension column is connected to the upper mold, the lower end of the middle mold suspension column is connected to the middle mold, the upper mold and the middle mold are separated in the up and down direction in the free state, and a controllable demoulding auxiliary mechanism is provided between the middle mold and the suspension seat. The invention has the advantages that the middle mold can be released from the upper mold by its own weight and can be assisted by a power-assisting mechanism when it cannot be released, thus solving the problem of the laborious process of manually releasing the middle mold from the upper mold in the existing rubber mold production process.

[0004] The above technical solution solves the laborious problem of manually separating the middle mold from the upper mold in the existing rubber mold production process. In the prior art, the gap between the upper and lower molds of the vulcanizer is a very important parameter in the plastic vulcanization process of the sealing ring, which directly affects the quality of the product and the efficiency of the vulcanization process. This gap usually refers to the minimum distance between the upper mold and the lower mold when the mold is closed to ensure that the rubber or other materials can be vulcanized under appropriate conditions. After the sealing ring is vulcanized, this gap will form a thinner "valve" connecting multiple finished sealing rings. The existence of the valve facilitates the storage of multiple finished sealing rings and the transportation of multiple sealing rings to subsequent processing equipment. The above technical solution pulls the finished product by mechanical force during demoulding, which will cause the valve to tear. The tearing of the valve will cause burrs to be torn on the surface of the sealing ring, and it is not convenient to collect and transport multiple finished sealing rings after the valve 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: A vacuum vulcanization device, comprising: Vulcanizing machine bottom plate; A lifting arm, the lifting arm is fixedly connected to the upper end of the bottom plate of the vulcanizer; A lifting platform, the lifting platform is fixedly connected to the side end of the lifting arm; A vulcanization heating system, wherein the vulcanization heating system is fixedly connected to a side end of the vulcanization heating system; A lower template, wherein the lower template is disposed on the upper end of the bottom plate of the vulcanizing machine; A lower mold, wherein the lower mold is opened at the upper end of the lower template; 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; 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; 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; 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; 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. The telescopic mechanism is arranged at the lower end of the lifting platform and connected to the upper mold plate. After the lower mold and the upper mold are closed, the lifting platform continues to descend through the action of the telescopic mechanism to reduce the pressure in the boosting mechanism, thereby sucking out the residual air in the mold.

[0007] As a preferred solution of the present invention, the demolding mechanism includes a demolding boosting 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 spring, the demolding boosting groove is opened in the bottom plate of the vulcanizer, the demolding spring groove is opened on the upper inner wall of the demolding boosting groove, the air outlet hole is opened on 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 connected to the vulcanization heating system, the spring push plate is slidably connected to 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, and the closed air plate matches the closed air hole.

[0008] As a preferred solution of the present invention, the diameters of the demoulding spring groove and the air outlet hole are larger than the diameter of the spring push plate.

[0009] As a preferred solution of the present invention, the movable component includes an air pressure regulating cylinder, an regulating groove, a pressure regulating slide plate, a boost push rod, a connecting plate and an air pressure recovery hole, the air pressure regulating cylinder is fixedly connected to the upper end of the vulcanizer bottom plate, the regulating groove is opened at the upper end of the air pressure regulating cylinder, the pressure regulating slide plate is slidably connected in the regulating groove, the boost push rod is fixedly connected to the upper end of the pressure regulating slide plate, the connecting plate is fixedly connected to the upper end of the lifting platform and the upper end of the boost push rod, and the air pressure recovery hole is opened on the inner wall of the regulating groove.

[0010] As a preferred solution of the present invention, each group of the air-deflating components includes a connecting air hole, an air-deflating cylinder, an air flow connecting pipe, an air-deflating push plate, an air-deflating hole, an air hole blocking block and a hole blocking spring. The air-deflating cylinder is arranged in an air pressure regulating cylinder, the connecting air hole is opened on one side inner wall of the regulating groove and one side end of the air-deflating cylinder, the air flow connecting pipe is fixedly connected to one side end of the air-deflating cylinder, the air-deflating push plate is slidably connected in the air-deflating cylinder, the air-deflating hole is opened on one side end of the air-deflating push plate, the air hole blocking block is fixedly connected to one side inner wall of the air-deflating cylinder and slides in the air-deflating hole, and the hole blocking spring is fixedly connected to one side end of the air-deflating push plate and one side inner wall of the air-deflating cylinder.

[0011] As a preferred solution of the present invention, the two groups of air-deflating push plates, air-deflating holes, air-hole blocking blocks and hole-blocking springs are installed in opposite directions.

[0012] As a preferred solution 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 connected to the air extraction groove, and the other air flow connecting pipe is connected to the demoulding boosting groove.

[0013] As a preferred solution of the present invention, the upper end of the pressure regulating slide plate and the upper end of the air pressure regulating cylinder are both fixedly connected with sealing rings.

[0014] As a preferred solution of the present invention, the telescopic mechanism includes a lifting groove, a lifting push plate, a plurality of pressure springs, a lower resistance block, a catalytic heater and a lower pressure cylinder, the lower pressure cylinder is fixedly connected to the lower end of the lifting platform, the lifting groove is opened at the lower end of the lower pressure 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, the plurality of 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 resistance block is fixedly connected to the upper inner wall of the lifting groove, and the catalytic heater is arranged in the lifting push plate.

[0015] A vacuum vulcanization method of the present invention comprises the following steps: S1. First, put the plasticized unvulcanized rubber compound strip into the upper end of the lower mold plate, and lay multiple strips at equal intervals to complete the mold loading. Then, the lifting arm drives the lifting platform to descend to complete the mold closing. The lifting platform can continue to descend through the telescopic mechanism after the mold closing is completed. During this process, the pressure regulating slide plate continues to move downward in the regulating groove. At this time, the total amount of air in the space at the upper end of the pressure regulating slide plate remains unchanged, but the volume increases, so that the air pressure at the upper end of the pressure regulating slide plate decreases and a pressure difference is formed before and after 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 out of contact with the air hole block to open the channel of the air flow connecting pipe, and the negative pressure at the upper end of the pressure regulating slide plate is used to suck out the residual air in the mold, so that the mold is kept in a vacuum state during the vulcanization process. S2. When the lifting platform and the pressure regulating slide plate move to the bottom, the pressure regulating slide plate slides to the lower end of the air pressure recovery hole. At this time, the external air flows into the regulating tank from the air pressure recovery hole, so that the air pressure at the upper end of the pressure regulating slide plate becomes a normal atmospheric pressure. The plugging spring pushes the air release push plate to re-close the air flow connecting pipe until the vulcanization process is completed; S3. When the vulcanization process is completed, the lifting arm drives the lifting platform to rise, and the pressure regulating slide also slides to the upper end of the air pressure recovery hole to re-seal the boost push rod. As the pressure regulating slide is lifted, the air pressure in the boost push rod increases, so that a pressure difference is formed before and after the other set of deflation push plates. The pressure difference forms a thrust to push the deflation push plate backward until the deflation hole is out of contact with the air hole block, and then the deflation cylinder is opened, and the high air pressure in the boost push rod flows out through the boost push rod, and the airflow flowing out of the boost push rod blows the valve of the vulcanized plastic, and then the vulcanized plastic is blown out of the mold to complete natural demolding.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through this device, during the demoulding process, the traditional mechanical force demoulding is replaced by air pressure punching. The air pressure punching force is gentle. When impacting the lower end of the valve, multiple sealing rings can be demoulded from the mold through the valve, and the integrity of the valve can be ensured, which is convenient for collecting multiple sealing rings. When the sealing ring is separated from the valve, the burrs on the surface of the sealing ring can also be reduced due to the integrity of the valve.

[0017] 2. Through this device, the pressure in the regulating tank is adjusted by the booster mechanism. By raising and lowering the lifting platform during a vulcanization operation, the air in the mold can be extracted by reducing the pressure, reducing bubbles inside the finished product, and improving product quality. The two functions of demoulding the finished sealing ring can be completed by boosting the pressure, which increases the practicality of this device.

[0018] 3. Through this device, vacuum extraction and pressurized die are completed by relying on the mechanical force of the lifting arm in the closed mold. No additional demoulding device and vacuum extraction device are required, which reduces the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural stereogram of the present invention; Figure 2 It is a cross-sectional view of the first structure in the present invention; Figure 3 It is a cross-sectional view of the second structure in the present invention; Figure 4 It is a cross-sectional view of the third structure in the present invention; Figure 5 It is a cross-sectional exploded view of the first structure in the present invention; Figure 6 It is a cross-sectional exploded view of the second structure in the present invention; Figure 7 It is a cross-sectional exploded view of the third structure in the present invention; Figure 8 It is a cross-sectional view of the fourth structure in the present invention; Fig. 9 For the present invention Figure 2 The enlarged view of point A in the middle; Fig.10 For the present invention Figure 3 The enlarged view of point B in the middle; Fig.11 For the present invention Figure 4 Enlarged view of point C in the middle; Fig.12 For the present invention Figure 5 The enlarged view of point D in the middle; Fig.13 For the present invention Figure 6 Enlarged view of point E in the middle; Fig.14 For the present invention Figure 7 Enlarged view of point F in the middle.

[0020] In the figure: 1, vulcanizing machine bottom plate; 102, lifting arm; 103, vulcanizing heating system; 104, lifting platform; 105, lower template; 106, lower mold; 107, upper template; 108, expansion gap; 109, upper mold; 201, demoulding booster groove; 202, demoulding spring groove; 203, air outlet; 204, closed air hole; 205, closed air plate; 206, spring push plate; 207, punch die spring; 301, air pressure regulating cylinder; 302, regulating groove; 30 3. Pressure regulating slide plate; 304. Boost push rod; 305. Connecting plate; 306. Connecting air hole; 307. Deflation cylinder; 308. Air flow connecting pipe; 309. Deflation push plate; 310. Deflation hole; 311. Air hole blocking block; 312. Hole blocking spring; 313. Sealing ring; 314. Air extraction groove; 315. Air pressure recovery hole; 401. Lifting groove; 402. Lifting push plate; 403. Pressure spring; 404. Lower resistance block; 405. Catalytic heater; 406. Lower pressure cylinder. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 See also Figure 1-Figure 14 , the present invention provides the following technical solutions: A vacuum vulcanization device, comprising: Vulcanizing machine bottom plate 1; A lifting arm 102, the lifting arm 102 is fixedly connected to the upper end of the bottom plate 1 of the vulcanizer; A lifting platform 104, the lifting platform 104 is fixedly connected to the side end of the lifting arm 102; The vulcanization heating system 103 is fixedly connected to the side end of the vulcanization heating system 103; The lower template 105 is provided at the upper end of the bottom plate 1 of the vulcanizing machine; A lower mold 106, which is disposed at the upper end of the lower mold plate 105; 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; 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; 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; 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; 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; 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.

[0023] In a specific embodiment of the present invention, the vulcanizing machine bottom plate 1 and the lifting arm 102 form the supporting structure of the entire machine to ensure its stability and strength. The vulcanization heating system 103 is a heating system of the device 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 of the upper half and the lower mold 106 of the lower half are closed to form the final shape mold of a rubber product. The lifting platform 104 is connected to the lifting arm 102, and the lifting platform 104 is driven to move up and down by the lifting arm 102. 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 increase the pressure in the booster mechanism. The expansion gap 108 is in the middle of the mold when the lower mold plate 105 and the upper mold plate 107 are closed, which is used to compensate for the expansion of the material. During the vulcanization process, materials such as rubber may expand to a certain extent due to heating. A suitable gap can provide space for such expansion to prevent material overflow or damage to the mold, and form a valve connected to the plastic product. The upper mold plate 107 is connected to the heating output end of the vulcanization heating system 103. After the mold is closed, the plastic vulcanization reaction is catalyzed by the heating component in the upper mold plate 107. When performing the plastic vulcanization process, the unvulcanized rubber compound strip that has been plasticized is first placed at the upper end of the lower mold plate 105, and multiple strips are placed. The mold is laid out at equal intervals to complete the mold loading, and then the lifting arm 102 drives the lifting platform 104 to descend to complete the mold closing. The telescopic mechanism allows the lifting platform 104 to continue to descend after the mold closing is completed, and in this process, the pressure regulating slide 303 continues to move downward in the adjusting groove 302. At this time, the total amount of air in the space above the pressure regulating slide 303 remains unchanged but the volume increases, causing the air pressure at the upper end of the pressure regulating slide 303 to drop and form a pressure difference before and after 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 out of contact with the air hole block 311 to open the channel of the air flow connecting pipe 308, and the negative pressure at the upper end of the pressure regulating slide 303 sucks out the residual air in the mold, so that the mold is vulcanized. The vacuum state is maintained during the process. When the lifting platform 104 and the pressure regulating slide plate 303 move to the bottom, the pressure regulating slide plate 303 slides to the lower end of the air pressure recovery hole 315. At this time, the external air flows into the regulating groove 302 from the air pressure recovery hole 315, so that the air pressure at the upper end of the pressure regulating slide plate 303 becomes a normal atmospheric pressure. The hole blocking spring 312 pushes the air release push plate 309 to re-close the air flow connecting pipe 308 until the vulcanization process is completed. When the vulcanization process is completed, the lifting arm 102 drives the lifting platform 104 to lift, and the pressure regulating slide plate 303 also slides to the upper end of the air pressure recovery hole 315 to re-close the boost push rod 304. As the pressure regulating slide plate 303 is lifted, the air pressure in the boost push rod 304 increases, so that a pressure difference is formed before and after another set of air release push plates 309.The pressure difference creates a thrust to push the deflation push plate 309 backward until the deflation hole 310 is out of contact with the air hole blocking block 311, and then the deflation cylinder 307 is opened, and the high air pressure in the booster push rod 304 flows out through the booster push rod 304, and the airflow flowing out of the booster push rod 304 blows the valve of the vulcanized plastic, and then blows the vulcanized plastic out of the lower mold 106, completing natural demoulding.

[0024] For details, please refer to Figure 1-Figure 14 The demoulding mechanism includes a demoulding boosting groove 201 and a plurality of air outlet components, each of which includes a demoulding 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 spring 207. The demoulding boosting groove 201 is arranged in the bottom plate 1 of the vulcanizer, the demoulding spring groove 202 is arranged on the upper inner wall of the demoulding boosting groove 201, and the air outlet hole 203 is arranged on the upper inner wall of the demoulding spring groove 202. The closed air hole 204 is opened at the upper end of the lower template 105 and is connected to the vulcanization heating system 103. The spring push plate 206 is slidably connected to the demoulding spring groove 202 and the air outlet 203. The spring push plate 206 is fixedly connected to the lower inner wall of the demoulding 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.

[0025] In this embodiment: the closed air plate 205 matches the closed air hole 204, and the closed air hole 204 is arranged at the lower end of the expansion gap 108 after the mold is closed. The valve in the plastic vulcanization process is formed at the closed air hole 204 and the upper end of the closed air plate 205. The die spring 207 is always in a compressed state to pull the closed air plate 205 to always close the closed 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 arranged in the air outlet 203 and connected to the closed air plate 205. When the demoulding boosting groove 201 is in a normal pressure state, the closed air plate 205 closes the closed air hole 204 and makes the upper surface of the lower template 105 a flat plane, which is convenient for the removal of the valve and the plastic finished product. When the lifting platform 104 is lifted upward after the vulcanization work is completed, the air pressure in the demoulding boosting groove 201 is boosted by The mechanism is enhanced, and 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 closed air plate 205, and stretch the die spring 207. As the closed air plate 205 is lifted, the thinner valve connected to the finished plastic is lifted upward, and the high-pressure air flowing out of the closed air hole 204 blows the valve to complete the preliminary separation of the finished plastic and the lower mold 106. After this process, a plurality of vulcanized plastic products arranged in the lower mold 106 and connected to the valve are no longer adhered to the lower mold 106 and the lower mold plate 105, which is convenient for taking out the molded plastic. When the finished plastic is taken out, the valve is separated from the vulcanized plastic part by a separation device. Since the vulcanized plastic product is not adhered to the mold when it is taken out, its integrity after taking out can be guaranteed, which is convenient for subsequent separation work and effectively reduces burrs.

[0026] For details, please refer to Figure 1-Figure 14 The diameters of the demoulding spring groove 202 and the air outlet hole 203 are greater than the diameter of the spring push plate 206 .

[0027] 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 203, and the diameter of the round plate at the lower end of the spring push plate 206 that contacts the die spring 207 is smaller than the diameter of the demoulding spring groove 202, so that the spring push plate 206 cannot block the air hole. After the closed air plate 205 is opened, the high-pressure air in the demoulding boost groove 201 can flow out from the air outlet 203 and the demoulding spring groove 202.

[0028] For details, please refer to Figure 1-Figure 14The movable components include 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 on the inner wall of the regulating groove 302.

[0029] In this embodiment, the movable component is used to adjust the air pressure in the air pressure regulating cylinder 301. The pressure regulating slide plate 303 is connected to the boost push rod 304 and the connecting plate 305. The connecting plate 305 follows the lifting and lowering of the lifting platform 104, and the boost push rod 304 blocks the upper opening of the regulating groove 302 to prevent air from flowing out of the upper opening of the regulating groove 302. When the vulcanization process is required, 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 regulating groove 302 is blocked by the boost push rod 304, and the lower half is blocked by the pressure regulating slide plate 303. Therefore, the total amount of air in the regulating groove 302 remains unchanged while the space becomes larger during the descent of the pressure regulating slide plate 303, so that negative pressure is formed in the regulating groove 302. The negative pressure pulls the air release push plate 309 to open the connecting channel airflow connecting pipe 308 to release the air remaining after the mold is closed. The air is sucked out to ensure that the plastic is in a vacuum state during high-temperature vulcanization, until the pressure regulating slide plate 303 slides to the bottom of the adjusting groove 302, at which time the pressure regulating slide plate 303 is located at the lower side of the air pressure recovery hole 315, and the external air flows into the adjusting groove 302 from the air pressure recovery hole 315 to make the adjusting groove 302 return to a normal atmospheric pressure, and the air release push plate 309 is pushed to reset by the hole blocking spring 312 to 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 in the adjusting groove 302 is pressurized, and the air is squeezed into the demoulding boosting groove 201 by the pressure regulating slide plate 303 to complete the demoulding of the plastic product, until the pressure regulating slide plate 303 slides to the upper end of the adjusting groove 302, the air on the upper end of the pressure regulating slide plate 303 is completely squeezed out, providing a vacuum environment for the next vulcanization process.

[0030] For details, please refer to Figure 1-Figure 14Each set of 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 blocking block 311 and a hole blocking spring 312. The air release cylinder 307 is arranged in the air pressure regulating cylinder 301, the connecting air hole 306 is opened on one side inner wall of the regulating groove 302 and one side end of the air release cylinder 307, the air flow connecting pipe 308 is fixedly connected to one side end of the air release cylinder 307, the air release push plate 309 is slidably connected in the air release cylinder 307, the air release hole 310 is opened on one side end of the air release push plate 309, the air hole blocking block 311 is fixedly connected to one side inner wall of the air release cylinder 307 and slides in the air release hole 310, and the hole blocking spring 312 is fixedly connected to one side end of the air release push plate 309 and one side inner wall of the air release cylinder 307.

[0031] In this embodiment: one end of the two groups of air-release components are both arranged on the inner wall of the adjusting groove 302, and are circulated with the air in the adjusting groove 302 through the connecting air hole 306, while the other end is respectively connected to the air outlet component and the air extraction groove 314, and the hole blocking spring 312 is used for the air-release push plate 309 to press against the inner wall of one side of the air-release cylinder 307. Unless the air pressure changes, the air-release push plate 309 will not move. When the air-release push plate 309 presses against the inner wall of the air-release cylinder 307, the air-release hole 310 and the air-hole blocking block 311 are closed. At this time, the air at the front and rear ends of the air-release push plate 309 will not circulate. When the air-release push plate 309 moves to the point where the air-release hole 310 and the air-hole blocking block 311 are out of contact, the air at the front and rear ends of the air-release push plate 309 can be connected through the air-release hole 310.

[0032] For details, please refer to Fig.11 The installation directions of the two sets of air-deflating push plates 309, air-deflating holes 310, air-hole blocking blocks 311 and hole-blocking springs 312 are opposite.

[0033] In this embodiment: the two sets of deflation components are installed in opposite directions, as shown in the attached manual. Fig.11As shown, the air-release push plate 309 arranged on the upper side abuts against the inner wall of the air-release cylinder 307 near the air flow connecting pipe 308, and this air-release component is used to extract the air in the mold, while the air-release push plate 309 on the lower side abuts against the inner wall of the air-release cylinder 307 near the connecting air hole 306, and this air-release component is used for demoulding of the finished product. When the air pressure in the regulating groove 302 decreases, a pressure difference is generated on the left and right sides of the two air-release push plates 309, and the pressure difference forms a pulling force on the air-release push plates 309 to the left, and the air-release push plate 309 on the lower side cannot move because it abuts against the inner wall on the left side of the air-release cylinder 307. Therefore, the air pressure reduction in the regulating groove 302 will not affect the demoulding mechanism, while the air-release push plate 309 on the upper side is pulled to the left by the low air pressure and The extrusion plugging spring 312 contracts, so that the opening of the bleed hole 310 is opened, and the air in the mold is sucked out by the negative pressure in the adjusting groove 302, and as the pressure regulating slide plate 303 continues to slide downward, the space of the adjusting groove 302 increases, so that the air pressure in the mold continues to decrease to approach a vacuum state. When the air pressure in the adjusting groove 302 increases, the pressure difference forms a thrust to the right on the bleed push plate 309, and the upper bleed push plate 309 presses against the right inner wall of the bleed cylinder 307, so that the bleed hole 310 is always in a closed state, and the lower bleed push plate 309 is pushed to the right, and the high-pressure air in the adjusting groove 302 flows from the lower bleed hole 310 into the demolding booster groove 201 and completes the demolding of the plastic product.

[0034] For details, please refer to Figure 1-Figure 14 An air extraction groove 314 is provided at the upper end of the lower template 105 , one of the air flow connecting pipes 308 is connected to the air extraction groove 314 , and the other air flow connecting pipe 308 is connected to the demoulding pressurization groove 201 .

[0035] In this embodiment: the air extraction groove 314 is arranged on the outer side of the lower template 105. When the upper template 107 and the lower template 105 are closed, the air extraction groove 314 is arranged in 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 regulating groove 302 decreases, the air in the mold is extracted through the air flow connecting pipe 308, and the air flow connecting pipe 308 of another air release component is connected to the demoulding boosting groove 201. When the air pressure in the regulating groove 302 increases, the high air pressure in the demoulding boosting groove 201 flushes the plastic product out of the mold.

[0036] For details, please refer to Figure 1-Figure 14 The upper end of the pressure regulating slide plate 303 and the upper end of the air pressure regulating cylinder 301 are both fixedly connected with a sealing ring 313.

[0037] In this embodiment, the sealing ring 313 is used to seal the upper and lower channels of the adjusting groove 302 to prevent air leakage when the air pressure in the adjusting groove 302 increases or decreases.

[0038] For details, please refer to Figure 1-Figure 14 The telescopic mechanism includes a lifting groove 401, a lifting push plate 402, a plurality of pressure springs 403, a lower stop block 404, a catalytic heater 405 and a lower pressure cylinder 406. The lower pressure cylinder 406 is fixedly connected to the lower end of the lifting platform 104. The lifting groove 401 is opened at the lower end of the lower pressure 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 pressure 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 stop 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.

[0039] In this embodiment: the lifting push plate 402 is connected to the upper end of the upper template 107 to support 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, and the catalytic heater 405 heats the mold to catalyze the vulcanization reaction in the plastic vulcanization process. When the lifting platform 104 descends to the upper template 107 and the lower template 105 are closed, the mold is in a closed state, and at this time the lifting platform 104 can continue to move downward to drive the pressure regulating slide 303 to move downward and reduce the air pressure in the adjustment groove 302. As the lifting platform 104 continues to descend, the pressure spring 403 is compressed, and the rebound force of the pressure spring 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 block 404 abuts against the upper end of the lifting push plate 402, at this time the lifting platform 104 can no longer move downward, and the pressure regulating slide 303 also descends to the bottom of the adjustment groove 302.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, 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 equipment, 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; A telescopic mechanism is provided 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 action of the telescopic mechanism to reduce the pressure in the boosting mechanism, thereby sucking out the residual air in the mold.

2. A vacuum vulcanization equipment according to claim 1, characterized in that: The demoulding mechanism comprises a demoulding boosting groove (201) and a plurality of groups of air outlet components, each group of air outlet components comprises a demoulding 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 spring (207), the demoulding boosting groove (201) is arranged in the bottom plate (1) of the vulcanizer, the demoulding spring groove (202) is arranged on the upper inner wall of the demoulding boosting groove (201), and the air outlet hole (203) is arranged on the upper inner wall of the demoulding spring groove (202). The closed air hole (204) is opened at the upper end of the lower mold plate (105) and is connected to the vulcanization heating system (103); the spring push plate (206) is slidably connected to the demoulding spring groove (202) and the air outlet hole (203); the spring push plate (206) is fixedly connected to the lower inner wall of the demoulding 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 equipment according to claim 2, characterized in that: The diameters of the demoulding spring groove (202) and the air outlet hole (203) are greater than the diameter of the spring push plate (206).

4. A vacuum vulcanization equipment according to claim 3, characterized in that: 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).

5. A vacuum vulcanization equipment according to claim 4, characterized in that: Each set of the air release components comprises 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 blocking block (311) and a hole blocking spring (312); the air release cylinder (307) is arranged in the air pressure regulating cylinder (301); the connecting air hole (306) is provided on one side inner wall of the regulating groove (302) and one side end of the air release cylinder (307); the air flow connecting pipe (308) The air-release push plate (309) is fixedly connected to one side end of the air-release cylinder (307), the air-release push plate (309) is slidably connected in the air-release cylinder (307), the air-release hole (310) is opened in one side end of the air-release push plate (309), the air-hole blocking block (311) is fixedly connected to one side inner wall of the air-release cylinder (307) and slides in the air-release hole (310), and the hole blocking spring (312) is fixedly connected to one side end of the air-release push plate (309) and one side inner wall of the air-release cylinder (307).

6. A vacuum vulcanization equipment according to claim 5, characterized in that: The two groups of the air-deflating push plates (309), the air-deflating holes (310), the air-hole blocking blocks (311) and the hole-blocking springs (312) are installed in opposite directions.

7. A vacuum vulcanization equipment according to claim 6, characterized in that: An air extraction groove (314) is provided at the upper end of the lower mold plate (105), one of the air flow connecting pipes (308) is connected to the air extraction groove (314), and the other air flow connecting pipe (308) is connected to the demoulding pressurization groove (201).

8. A vacuum vulcanization equipment according to claim 7, characterized in that: The upper end of the pressure regulating slide plate (303) and the upper end of the air pressure regulating cylinder (301) are both fixedly connected with a sealing ring (313).

9. A vacuum vulcanization equipment according to claim 8, characterized in that: The telescopic mechanism comprises a lifting groove (401), a lifting push plate (402), a plurality of pressure springs (403), a lower stop block (404), a catalytic heater (405) and a lower pressure cylinder (406); the lower pressure cylinder (406) is fixedly connected to the lower end of the lifting platform (104); the lifting groove (401) is opened at the lower end of the lower pressure 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 pressure 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 stop block (404) is fixedly connected to the upper inner wall of the lifting groove (401); and the catalytic heater (405) is arranged in the lifting push plate (402).

10. A vacuum vulcanization method, characterized in that: The vacuum vulcanization equipment according to claim 9 is used, comprising the following steps: S1. First, the plasticized unvulcanized rubber compound strip is placed on the upper end of the lower mold plate (105), and a plurality of strips are laid at equal intervals to complete the mold installation. Then, the lifting arm (102) drives the lifting platform (104) to descend to complete the mold closing. The lifting platform (104) can continue to descend after the mold closing is completed through the telescopic mechanism. During this process, the pressure regulating slide plate (303) continues to move downward in the regulating groove (302). At this time, the total amount of air in the space at the upper end of the pressure regulating slide plate (303) remains unchanged, but the volume increases, so that the air pressure at the upper end of the pressure regulating slide plate (303) decreases and a pressure difference is formed between the front and rear 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 out of contact with the air hole blocking block (311) to open the channel of the air flow connecting pipe (308), and the negative pressure at the upper end of the pressure regulating slide plate (303) sucks out the air remaining in the mold, so that the mold maintains a vacuum state during the vulcanization process. S2, when the lifting platform (104) and the pressure regulating slide plate (303) move to the bottom, the pressure regulating slide plate (303) slides to the lower end of the air pressure recovery hole (315), and then the external air flows into the regulating groove (302) from the air pressure recovery hole (315), so that the air pressure at the upper end of the pressure regulating slide plate (303) becomes a normal atmospheric pressure, and the hole blocking spring (312) pushes the air release push plate (309) to re-close the air flow connecting pipe (308) until the vulcanization process is completed; S3. After the vulcanization process is completed, the lifting arm (102) drives the lifting platform (104) to lift, and the pressure regulating slide plate (303) also slides to the upper end of the air pressure recovery hole (315) to re-close the boost push rod (304). As the pressure regulating slide plate (303) is lifted, the air pressure in the boost push rod (304) increases, so that a pressure difference is formed before and after the other set 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 out of contact with the air hole blocking block (311), thereby opening the air release cylinder (307), and the high air pressure in the boost push rod (304) flows out through the boost push rod (304). The airflow flowing out of the boost push rod (304) blows the valve of the vulcanized plastic, thereby blowing the vulcanized plastic out of the lower mold (106), completing natural demoulding.

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