An adsorption shaping tool for hot pressing of automobile sound insulation products

Abstract

The present invention relates to the field of sound insulation accessories production, specifically an adsorption and shaping tooling for hot pressing of automobile sound insulation products, including a plurality of adsorption air ducts provided on a fixed mold. The tooling also includes a limiting mechanism for dynamically limiting the sound insulation raw materials, and a shaping mechanism for pressing the sound insulation raw materials to make them fit on the fixed mold. The present invention adopts a slidable connecting component provided on a bearing frame, and utilizes an insert rod and a limiting tube on the component to limit the upper and lower layers of sound insulation raw materials respectively, so that when the sound insulation raw materials shrink toward the center of the mold during negative pressure adsorption and hot pressing, the insert rod and the limiting tube can move adaptively accordingly, effectively preventing the sound insulation raw materials from being subjected to excessive tensile stress. The present invention adopts a material-stroking plate controlled by a connecting rod assembly, which can be driven to extend into the upper side of the fixed mold to actively stroke and smooth the covered sound insulation raw materials to ensure that the raw materials fit closely to the mold surface.

Description

Technical Field

[0001] The invention relates to the field of sound insulation accessories production, in particular to an adsorption shaping tool for hot pressing of automobile sound insulation products. Background Art

[0002] Automotive sound insulation products are often manufactured using multi-layer fiber or composite materials through a hot pressing process. This process usually places the sound insulation material in the mold of the hot pressing equipment, and plasticizes, fuses and forms it into the desired shape under heating and pressure conditions. In this process, the hot pressing equipment and its supporting adsorption and shaping tooling are crucial to ensuring the product's dimensional accuracy, surface flatness, and avoiding defects such as wrinkles and poor fitting.

[0003] Existing hot pressing molding equipment for automotive sound insulation products is mainly composed of a hydraulic press and a matching mold. The mold includes a movable mold and a fixed mold. Among them, a number of adsorption air channels are generally opened on the working surface of the fixed mold. These air channels are connected to the vacuum system. After the raw materials are placed and before the mold is closed and pressurized, the vacuum system is started. The negative pressure generated by the adsorption air channel is used to initially adsorb the two layers of sound insulation materials on the surface of the fixed mold, aiming to prevent the raw materials from wrinkling during the subsequent mold closing process and improve their fit with the mold surface.

[0004] In addition, in order to preliminarily position the raw materials when placing them and prevent them from being displaced or slipping, a number of limiting spikes are usually fixedly installed on the outer edge of the fixed mold. When placing the raw materials, the operator needs to respectively put the edge positions of the two layers of sound insulation materials on the outside of these fixedly connected limiting spikes to achieve pre-fixation of the raw materials.

[0005] However, the above-mentioned existing technology still has shortcomings: First, since the limiting spikes are fixedly installed on the outside of the fixed mold, when the sound insulation material is adsorbed by negative pressure to fit the fixed mold surface, and when the material is heated and softened during the mold closing process, the raw material will shrink toward the center of the mold. At this time, the edge part of the sound insulation material nailed by the fixed spikes cannot move with the overall shrinkage of the material, resulting in excessive tensile stress on the raw material in the area near the spikes. This stress can easily cause local excessive stretching and tension of the sound insulation material, thereby causing wrinkles, or directly cause the material to be torn at the spikes when the material strength is insufficient, seriously affecting product quality and yield.

[0006] Secondly, the existing technology mainly relies on negative pressure adsorption to achieve the bonding of raw materials, and lacks an active physical scraping mechanism to assist in the adsorption area. This can easily cause the sound insulation materials to become uneven, suspended, or not fit the mold at the corners of the moving mold, affecting the sound insulation performance and appearance quality of the product. Summary of the Invention

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an adsorption shaping tool for hot pressing of automobile sound insulation products, including a plurality of adsorption air channels opened on the fixed mold, the tool also includes a limiting mechanism for dynamically limiting the sound insulation material, and a shaping mechanism for pressing the sound insulation material to make it fit on the fixed mold.

[0008] The limiting mechanism includes a supporting frame, a plurality of connecting components are arranged on the upper side of the supporting frame, an insertion rod and a limiting tube are arranged on the connecting component, a pointed rod is arranged on the inner side of the limiting tube for sliding up and down, and a pulling component for pulling the insertion rod and the limiting tube with equal force is arranged on the supporting frame.

[0009] The shaping mechanism includes a plurality of square pillars, and a material-stroking plate is arranged on the lower side of the square pillars through a connecting rod assembly.

[0010] When the sound insulation material is hot-pressed, two layers of the sound insulation material are inserted into the insertion rod and the limiting tube respectively. Then the connecting rod assembly drives the material-feeding plate to push the sound insulation material to fit the bend of the fixed mold. With the help of the negative pressure in the adsorption airway, the sound insulation material is adsorbed and shaped. The insertion rod and the limiting tube move adaptively with the retraction amount of the material to prevent wrinkles and deformation.

[0011] Preferably, the connecting assembly includes a No. 1 slide and a No. 2 slide which are slidably arranged on the supporting frame in a direction perpendicular to the corresponding frame of the supporting frame. The No. 1 slide is hinged to the corresponding insertion rod, and the No. 2 slide is fixedly connected to the corresponding limiting tube.

[0012] Preferably, the pulling assembly includes a counterweight frame that is slidably arranged on the outside of the carrying frame, an L-shaped bracket corresponding to the No. 1 slide is fixedly installed on the outside of the carrying frame, and a fixed pulley is fixedly installed on the upper side of the vertical section of the L-shaped bracket.

[0013] Preferably, the pulling assembly also includes a movable pulley, a No. 1 steel wire rope is wound around the outer side of the movable pulley sheave, and the two ends are respectively fixedly connected to the corresponding No. 1 skateboard and No. 2 skateboard. The pulley frame of the movable pulley is fixedly connected to the counterweight frame through the No. 2 steel wire rope wound around the outer side of the fixed pulley sheave.

[0014] Preferably, a chamfer having the same slope as the conical structure of the pointed rod is provided on the upper edge of the limiting tube.

[0015] Preferably, two toggle plates extending radially along the pointed rod to the outside of the corresponding limiting tubes are fixedly installed on the outside of the pointed rod, and a tension spring is provided between the lower end of the pointed rod and the limiting tube.

[0016] Preferably, a semicircular groove is provided on the outer side of the pointed rod, a limiting block is provided on the outer side of the limiting tube for radial sliding, the part of the limiting block close to the axis of the pointed rod is a hemispherical structure, and a push spring is provided between the limiting block and the limiting tube.

[0017] Preferably, a plurality of pressing plates are hinged at equal intervals along the circumference of the upper side of the limiting tube, a No. 1 torsion spring is provided between the pressing plate and the limiting tube, and the hinge axis of the pressing plate is connected to the pointed rod by a nylon wire.

[0018] Preferably, a linkage plate is fixedly installed at the lower end of the pointed rod through a connecting rod, and a locking rod for inserting into the hinge of the insertion rod is fixedly installed on the side of the linkage plate away from the connecting rod, and a No. 2 torsion spring is provided between the insertion rod and the No. 1 slide plate.

[0019] Preferably, the connecting rod assembly includes a lifting plate that slides up and down on a square pillar, a linear groove is opened on the upper side of the material-stroking plate, the upper end of the lifting plate cooperates with the linear groove of the material-stroking plate, and a sliding square rod is hinged in the middle of the material-stroking plate, and the sliding square rod is slidably connected to the lifting plate along its length direction.

[0020] The beneficial effects of the present invention are: 1. The present invention adopts a sliding connection component set on the supporting frame, and uses the insertion rod and the limiting tube on the component to limit the upper and lower layers of sound insulation materials respectively, so that when the sound insulation material shrinks toward the center of the mold during the negative pressure adsorption and hot pressing process, the insertion rod and the limiting tube can move adaptively accordingly, effectively avoiding the sound insulation material from being subjected to excessive tensile stress, and effectively improving product quality and yield.

[0021] 2. The present invention uses the movable pulley, fixed pulley and counterweight frame in the pulling assembly to cooperate with each other, and converts the gravity of the counterweight frame into a constant pulling force applied to the insertion rod and the limiting tube, ensuring that during the shrinkage process of the raw material, regardless of the shrinkage amount, the pulling force always remains unchanged, thereby stably maintaining the positioning effect of the raw material and effectively preventing the raw material from deflecting or sliding.

[0022] 3. The present invention adopts a movable pulley to pull the No. 1 slide plate and the No. 2 slide plate through the No. 1 steel wire rope, so that when the shrinkage of the two layers of sound insulation materials pulled by the insertion rod and the limiting tube respectively is different, the constant pulling force on the two layers can still be dynamically maintained, thereby improving the adaptability of the tooling to materials with different shrinkage characteristics.

[0023] 4. The present invention adopts a material-stroking plate controlled by a connecting rod assembly, which can be driven to extend into the upper side of the fixed mold to actively stroke and smooth the covered sound insulation material, ensuring that the material fits tightly to the mold surface, effectively solving the problem that it is difficult to make the raw material fit completely at the corner by relying solely on negative pressure adsorption. The material-stroking plate can then be swung to the outside of the fixed mold to prevent obstruction of subsequent mold closing operations and ensure the smooth progress of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the adsorption air channel, the carrying frame, the insertion rod and the limiting tube in the present invention.

[0027] Figure 3 It is a partial cross-sectional view of the position limiting tube, the pointed rod, the second slide plate and the counterweight frame in the present invention.

[0028] Figure 4 It is a partial cross-sectional view of the No. 1 slide plate, the No. 2 slide plate, the insert rod and the pointed rod in the present invention.

[0029] Figure 5 It is a partial cross-sectional view of the limiting tube, the pointed rod and the limiting block in the present invention.

[0030] Figure 6 It is a partial cross-sectional view of the limiting tube, pointed rod, pressing plate and nylon thread in the present invention.

[0031] Figure 7 It is a structural schematic diagram of the limiting tube and the pressing plate in the present invention.

[0032] Figure 8 It is a structural diagram of the square pillar, connecting rod assembly and material plate in the present invention.

[0033] Figure 9 It is a structural diagram of the square pillar, lifting plate, sliding square rod and material-controlling plate in the present invention.

[0034] Figure 10 This is a state diagram of the lower part of the material-stroking plate in the present invention being deflected from a position close to the center of the fixed mold to a position away from the center of the fixed mold.

[0035] In the figure: 1. Adsorption air duct; 2. Limiting mechanism; 3. Shaping mechanism; 21. Carrying frame; 22. Connecting assembly; 23. Insert rod; 24. Limiting tube; 25. Pointed rod; 26. Pulling assembly; 31. Square pillar; 32. Connecting rod assembly; 33. Material-stroking plate; 221. Slide plate No. 1; 222. Slide plate No. 2; 241. Limiting block; 242. Material-pressing plate; 243. Nylon wire; 251. Toggle plate; 252. Connecting rod; 253. Linkage plate; 254. Locking rod; 261. Counterweight frame; 262. L-shaped bracket; 263. Fixed pulley; 264. Movable pulley; 321. Lifting plate; 322. Sliding square rod. DETAILED DESCRIPTION

[0036] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0037] See Figure 1、 Figure 2 and Figure 8 An adsorption shaping tool for hot pressing of automobile sound insulation products includes a plurality of adsorption air channels 1 provided on a fixed mold, a limiting mechanism 2 for dynamically limiting the sound insulation material, and a shaping mechanism 3 for pressing the sound insulation material to make it fit on the fixed mold.

[0038] It should be noted that the tooling is set on the existing hot pressing forming equipment, which consists of a hydraulic press, a fixed mold and a movable mold. The hydraulic press consists of a base and a movable plate that slides up and down on the base. The fixed mold is fixedly installed at the lower part of the base, and the movable mold is fixedly installed on the movable plate. By controlling the movable plate to slide downward, the movable plate drives the movable mold and the fixed mold to close the mold, thereby hydraulically forming the sound insulation material between the movable mold and the fixed mold.

[0039] It should be noted that the adsorption air channel 1 on the fixed mold is connected to the existing vacuum exhaust system, which is not shown in the figure.

[0040] When automobile sound insulation products need to be hot-pressed, multiple operators first pull the edges and corners of the sound insulation material and lay two layers of sound insulation material on the upper part of the fixed mold and the lower part of the movable mold. Then, the edges of the two layers of sound insulation material are fixedly connected to the limiting mechanism 2. After that, the movable mold is moved downward by driving the movable plate. The movable mold drives the shaping mechanism 3 to scrape the two layers of sound insulation material so that the two layers of sound insulation material are attached to the fixed mold. At the same time, the vacuum exhaust system is started to continuously form a negative pressure inside the adsorption air duct 1, thereby adsorbing the two layers of sound insulation material on the movable mold, and then adsorbing and shaping the two layers of sound insulation material.

[0041] When the shaping mechanism 3 is scraping the two layers of sound insulation materials, the two layers of sound insulation materials shrink their edges toward the center position because they need to fit on the fixed mold, so that the shaping mechanism 3 moves synchronously with the sound insulation materials, thereby ensuring that the pulling force on the two layers of sound insulation materials is constant, preventing the sound insulation materials from being wrinkled and damaged due to excessive stress. The movable mold that continues to move downward pushes the shaping mechanism 3 to make way, allowing the movable mold and the fixed mold to be combined, and then the two layers of sound insulation materials are hot-pressed.

[0042] See Figure 1 、 Figure 2 and Figure 3 The limiting mechanism 2 includes a supporting frame 21, and a plurality of connecting components 22 are arranged on the upper side of the supporting frame 21. The connecting component 22 is provided with an insertion rod 23 and a limiting tube 24. A pointed rod 25 is provided on the inner side of the limiting tube 24 for sliding up and down. The supporting frame 21 is provided with a pulling component 26 for pulling the insertion rod 23 and the limiting tube 24 with equal force.

[0043] It should be noted that the carrying frame 21 is fixedly mounted on the pedestal, and the carrying frame 21 is sleeved on the outside of the fixed mold, and a plurality of connecting components 22 are arranged along the edge of the carrying frame 21 .

[0044] See Figure 1 、 Figure 2 and Figure 4 The connecting component 22 includes a No. 1 slide 221 and a No. 2 slide 222 which are slidably arranged on the supporting frame 21 in a direction perpendicular to the corresponding frame of the supporting frame 21. The No. 1 slide 221 is hinged to the corresponding insertion rod 23, and the No. 2 slide 222 is fixedly connected to the corresponding limiting tube 24.

[0045] In the initial state, the insertion rod 23 is horizontally arranged inside the No. 1 slide 221, and the pointed rod 25 is located at the upper part of the upwardly extending limiting tube 24, so that in the initial state, the insertion rod 23 cannot puncture and limit the sound insulation material, and at the same time, the limiting tube 24 can puncture and limit the sound insulation material through the pointed rod 25.

[0046] See Figure 4 、 Figure 5 and Figure 6 A chamfer with the same slope as the conical structure of the pointed rod 25 is provided at the upper edge of the limiting tube 24. Two toggle plates 251 are fixedly installed on the outer side of the pointed rod 25 and extend radially along the pointed rod 25 to the outer side of the corresponding limiting tube 24. A tension spring is provided between the lower end of the pointed rod 25 and the limiting tube 24.

[0047] When the pointed rod 25 extends upward from the upper part of the limiting tube 24, the pointed rod 25 pulls the tension spring at the corresponding position into a stretched state, and at this time, the conical structure of the pointed rod 25 matches the chamfered position on the limiting tube 24, so that the conical structure of the pointed rod 25 and the chamfer of the limiting tube 24 together form a conical surface structure, so that the sound insulation material can slide smoothly downward to the outside of the limiting tube 24 through the puncture of the pointed rod 25.

[0048] See Figure 3 and Figure 5 A semicircular groove is provided on the outer surface of the pointed rod 25, and a limiting block 241 is provided on the outer side of the limiting tube 24 for radial sliding. The part of the limiting block 241 close to the axis of the pointed rod 25 is a hemispherical structure, and a push spring is provided between the limiting block 241 and the limiting tube 24.

[0049] When the pointed rod 25 extends upward from the upper part of the limiting tube 24, the semicircular groove on the pointed rod 25 corresponds to the position of the hemispherical structure of the limiting tube 24, so that the push spring pushes the limiting block 241 toward the direction close to the axis of the limiting tube 24 through its own elastic force, thereby inserting the hemispherical structure of the limiting tube 24 into the semicircular groove of the pointed rod 25, and then locking the pointed rod 25 and the limiting tube 24 together within a certain pressing force range.

[0050] See Figure 3 and Figure 4 The lower end of the pointed rod 25 is fixedly installed with a linkage plate 253 through a connecting rod 252. A locking rod 254 for inserting into the hinge of the insertion rod 23 is fixedly installed on the side of the linkage plate 253 away from the connecting rod 252. A No. 2 torsion spring is arranged between the insertion rod 23 and the No. 1 slide 221, and the No. 2 torsion spring is not shown in the figure.

[0051] It should be noted that a through hole perpendicular to the length direction of the insertion rod 23 is provided on the insertion rod 23 and located at the hinge between the insertion rod 23 and the first slide plate 221 .

[0052] When the insertion rod 23 is horizontally arranged inside the No. 1 slide 221, the insertion rod 23 twists the No. 2 torsion spring into a torsion state, and when the pointed rod 25 extends upward from the upper part of the limit tube 24, the pointed rod 25 pulls the linkage plate 253 through the connecting rod 252, so that the linkage plate 253 drives the locking rod 254 to penetrate into the through hole of the insertion rod 23 at the corresponding position, thereby locking the insertion rod 23 and the No. 1 slide 221 together.

[0053] See Figure 4 、 Figure 6 and Figure 7 A number of pressure plates 242 are hinged at equal intervals along the circumference of the upper side of the limiting tube 24. A No. 1 torsion spring is arranged between the pressure plate 242 and the limiting tube 24. The No. 1 torsion spring is not shown in the figure. The hinge axis of the pressure plate 242 is connected to the pointed rod 25 by a nylon wire 243.

[0054] When the pointed rod 25 extends upward from the upper part of the limiting tube 24, the pointed rod 25 drives the nylon wire 243 to be in a relaxed state, so that the No. 1 torsion spring drives the pressing plate 242 to deflect to a position close to the axis of the limiting tube 24 through its own elastic force, and makes the pressing plate 242 located inside the pointed rod 25, and at the same time makes the pressing plate 242 and the pointed rod 25 have the same inclination of the conical surface, preventing the pressing plate 242 from hindering the pointed rod 25 from puncturing the sound insulation material.

[0055] When the sound insulation material needs to be hot-pressed, the operator lays the sound insulation material on the lower layer on the upper part of the fixed mold, and makes the edge of the sound insulation material located on the upper part of each pointed rod 25. The operator presses the edge of the sound insulation material downward so that the pointed rod 25 punctures the sound insulation material on the lower layer. Then, the operator is guided by the conical surface of the pointed rod 25 so that the sound insulation material on the lower layer is smoothly mounted on the outside of the limiting tube 24.

[0056] Then the operator presses down hard on the position of the toggle plate 251 corresponding to the lower layer of sound insulation material, so that the lower layer of sound insulation material pushes the toggle plate 251 to move downward, and the toggle plate 251 drives the pointed rod 25 at the corresponding position to move synchronously, so that the pointed rod 25 pushes the limit block 241 at the corresponding position away from its axis, so that the limit block 241 no longer limits the pointed rod 25, and then the tension spring quickly pulls the pointed rod 25 downward through its own tension, causing the pointed rod 25 to completely shrink to the inside of the corresponding limit tube 24.

[0057] When the pointed rod 25 moves downward, the pointed rod 25 pulls the pressing plate 242 through the nylon wire 243 to deflect in the direction away from the axis of the limiting tube 24, so that the pressing plate 242 flips to the outside of the limiting tube 24, thereby blocking the upper end of the limiting tube 24 through the extended pressing plate 242, and the blocking of the pressing plate 242 prevents the lower layer of sound insulation material from escaping from the limiting tube 24 under the action of the pulling force.

[0058] When the pointed rod 25 moves downward, the pointed rod 25 pushes the linkage plate 253 to move downward synchronously through the connecting rod 252, so that the linkage plate 253 drives the locking rod 254 to exit the through hole of the insertion rod 23, and then the No. 2 torsion spring drives the insertion rod 23 to flip to a vertical state through its own elastic force. While the insertion rod 23 flips, it can push the lower layer of sound insulation material in the direction close to the movable mold through its own cylindrical surface to prevent the insertion rod 23 from puncturing the lower layer of sound insulation material, so as to ensure the independent contraction of the upper and lower layers of sound insulation material.

[0059] It should be noted that when the insertion rod 23 is flipped to a vertical arrangement, the No. 1 slide 221 can block the insertion rod 23, thereby preventing the insertion rod 23 from continuing to flip toward the direction close to the movable mold, so that when the sound insulation material pulls the insertion rod 23 toward the movable mold, the insertion rod 23 can remain vertical, preventing the sound insulation material from falling off the insertion rod 23.

[0060] When the insertion rod 23 is flipped to a vertical arrangement, the operator lays the upper layer of sound insulation material on the upper part of the lower layer of sound insulation material, and presses the edge of the upper layer of sound insulation material to be sleeved on the outside of the insertion rod 23. At this time, since the pointed rod 25 is completely retracted inside the limiting tube 24, and the pressing plate 242 blocks the upper end of the limiting tube 24, the upper layer of sound insulation material will not be sleeved on the outside of the limiting tube 24.

[0061] See Figure 1 、 Figure 8 and Figure 9 The shaping mechanism 3 includes a plurality of square pillars 31 , and a material-stroking plate 33 is provided on the lower side of the square pillars 31 through a connecting rod assembly 32 .

[0062] It should be noted that the upper end of the square pillar 31 is fixedly connected to the upper part of the base, and the lower end of the square pillar 31 passes through the movable plate to the lower part of the movable plate.

[0063] See Figure 8 、 Figure 9 and Figure 10 The connecting rod assembly 32 includes a lifting plate 321 that is slidably arranged on the square pillar 31. A linear groove is opened on the upper side of the material plate 33. The upper end of the lifting plate 321 cooperates with the linear groove of the material plate 33. A sliding square rod 322 is hinged in the middle of the material plate 33. The sliding square rod 322 is slidably connected to the lifting plate 321 along its length direction.

[0064] It should be noted that a pulling spring is provided between the lifting plate 321 and the square pillar 31, and a return spring is provided between the sliding square rod 322 and the lifting plate 321. In the initial state, the material-stroking plate 33 is in an inclined arrangement with the lower part close to the center of the movable mold and the upper part away from the center of the movable mold, and the lower part of the material-stroking plate 33 corresponds to the upper part of the upper bend corner of the fixed mold, and the end of the sliding square rod 322 away from the center of the movable mold is attached to the square pillar 31.

[0065] When the operator puts the upper layer of sound insulation material on the insertion rod 23, the movable mold is moved downward by the hydraulic press so that the movable mold moves to contact the upper side of the material plate 33 and pushes the material plate 33 downward. At this time, due to the obstruction of the sliding square rod 322 by the square pillar 31, the material plate 33 cannot push the sliding square rod 322 to move, so that the material plate 33, the sliding square rod 322 and the lifting plate 321 form a triangular structure.

[0066] Then the movable mold pushes the material-stroking plate 33 to maintain the tilt angle and descend synchronously, so that the material-stroking plate 33 pushes the two layers of sound insulation materials to fit on the fixed mold, and at the same time starts the vacuum exhaust system to continuously form a negative pressure inside the adsorption air channel 1, thereby adsorbing the two layers of sound insulation materials on the fixed mold, and then adsorbing and shaping the two layers of sound insulation materials. In the process of the two layers of sound insulation materials being fitted on the fixed mold, the edge position of the sound insulation materials shrinks toward the center of the movable mold.

[0067] See Figure 2 and Figure 3 The pulling assembly 26 includes a counterweight frame 261 that slides up and down on the outside of the carrying frame 21. An L-shaped bracket 262 corresponding to the No. 1 slide 221 is fixedly installed on the outside of the carrying frame 21, and a fixed pulley 263 is fixedly installed on the upper side of the vertical section of the L-shaped bracket 262.

[0068] Continue reading Figure 2 and Figure 3The pulling assembly 26 also includes a movable pulley 264. A No. 1 steel wire rope is wound around the outer side of the sheave of the movable pulley 264, and its two ends are fixedly connected to the corresponding No. 1 skateboard 221 and No. 2 skateboard 222. The pulley frame of the movable pulley 264 is fixedly connected to the counterweight frame 261 through a No. 2 steel wire rope wound around the outer side of the sheave of the fixed pulley 263.

[0069] It should be noted that the fixed pulley 263 and the movable pulley 264 are both composed of a pulley frame and a groove wheel rotatably arranged on the pulley frame. The lower sides of the No. 1 slide 221 and the No. 2 slide 222 are fixedly installed with a blocking plate. In the initial state, the counterweight frame 261 pulls the movable pulley 264 away from the movable mold by its own gravity, so that the movable pulley 264 simultaneously pulls the No. 1 slide 221 and the No. 2 slide 222 through the No. 1 wire rope, so that the blocking plates of the No. 1 slide 221 and the No. 2 slide 222 are against the supporting frame 21.

[0070] When the edge positions of the two layers of sound insulation materials shrink toward the center of the movable mold, the two layers of sound insulation materials pull the No. 1 slide 221 and the No. 2 slide 222 to move synchronously through the insertion rod 23 and the limiting tube 24, so that the No. 1 slide 221 and the No. 2 slide 222 pull the supporting frame 21 upward through the movable pulley 264. In this process, since the gravity of the supporting frame 21 remains unchanged, the pulling force of the supporting frame 21 on the two layers of sound insulation materials is constant, which effectively prevents the sound insulation materials from being subjected to excessive tensile stress, and effectively improves product quality and yield.

[0071] When the shrinkage of the two layers of sound insulation materials is different, the insertion rod 23 and the limiting tube 24 pull the movement of the No. 1 slide 221 and the No. 2 slide 222 to different amounts, so that the movable pulley 264 adapts to the different movement amounts of the No. 1 slide 221 and the No. 2 slide 222 through the rotation of its groove wheel, and can still dynamically maintain a constant pulling force on the two layers of sound insulation materials, thereby improving the adaptability of the tooling to materials with different shrinkage characteristics.

[0072] When the lower portion of the material-stroking plate 33 moves to the lower side of the fixed die, Figure 10 As shown, the lifting plate 321 drives the sliding square rod 322 to move to the lower part of the square pillar 31, so that the square pillar 31 no longer blocks the sliding square rod 322, and then the movable mold that continues to move downward pushes the material touching plate 33, so that the lower part of the material touching plate 33 deflects in the direction away from the fixed mold. At the same time, the material touching plate 33 drives the sliding square rod 322 to slide synchronously in the direction away from the fixed mold and compresses the return spring, thereby preventing the material touching plate 33 from blocking the mold closing.

[0073] It should be noted that when the movable mold pushes the material-stroking plate 33 to deflect, there is a certain distance between the lower part of the material-stroking plate 33 and the lower side surface of the fixed mold to prevent the lower part of the material-stroking plate 33 from being stuck on the lower side surface of the fixed mold when it flips over.

[0074] Then the movable mold moves to close the mold with the fixed mold, and the two layers of sound insulation materials are hot-pressed. At this time, the material plate 33 is completely pushed to the outside of the fixed mold by the movable mold, and the material plate 33 drives the sliding square rod 322 to move to block the lower part of the square pillar 31.

[0075] After the two layers of sound insulation materials are hot-pressed into sound insulation products, the movable mold automatically cuts off the two layers of sound insulation materials inserted on the limiting tube 24 and the insertion rod 23, so that the two layers of sound insulation materials inserted on the limiting tube 24 and the insertion rod 23 are discarded as scraps, and the movable mold is moved upward to the initial position. The return spring pushes the sliding square rod 322 through its own elastic force to drive the material plate 33 to move to the initial inclined posture. Then the sliding square rod 322 no longer blocks the square pillar 31, so that the pulling spring pulls the material plate 33 and the lifting plate 321 upward through its own tension to reset.

[0076] Then the operator removes the sound insulation material from the limiting tube 24 and the insertion rod 23 layer by layer, and manually flips the insertion rod 23 until it is again located inside the No. 1 slide 221. Then the operator manually pulls up the toggle plate 251, drives the pointed rod 25 upward to the initial position, and makes the locking rod 254 insert into the through hole of the corresponding position of the insertion rod 23 again, thereby locking the insertion rod 23 and the No. 1 slide 221 together again.

[0077] See Figures 1 to 10 When hot-pressing automobile sound insulation products, the present invention further includes the following steps: In the first step, the operator lays the lower layer of sound insulation material on the upper part of the fixed mold so that the edge of the lower layer of sound insulation material is sleeved on the outside of the limiting tube 24, and then the operator presses down the position of the lower layer of sound insulation material corresponding to the toggle plate 251, so that the pointed rod 25 is completely retracted to the inside of the corresponding limiting tube 24.

[0078] In the second step, the pointed rod 25 pulls the pressing plate 242 through the nylon wire 243 to flip it to the outside of the limiting tube 24, thereby blocking the upper end of the limiting tube 24 to prevent the lower layer of sound insulation material from escaping from the limiting tube 24 under the action of the pulling force.

[0079] In the third step, the pointed rod 25 drives the locking rod 254 to withdraw from the through hole of the insertion rod 23, and the No. 2 torsion spring drives the insertion rod 23 to flip to a vertical state. The operator lays the upper layer of sound insulation material on the upper part of the lower layer of sound insulation material, and presses the edge of the upper layer of sound insulation material onto the outside of the insertion rod 23.

[0080] In the fourth step, the movable mold is moved downward by the hydraulic press so that the movable mold pushes the two layers of sound insulation materials to fit on the fixed mold through the material-stroking plate 33, and at the same time, the vacuum exhaust system is started to continuously form a negative pressure inside the adsorption air channel 1, thereby adsorbing the two layers of sound insulation materials on the fixed mold, and then adsorbing and shaping the two layers of sound insulation materials.

[0081] In the fifth step, the two layers of sound insulation materials are respectively pulled upward by the support frame 21 through the insertion rod 23 and the limiting tube 24. During this process, since the gravity of the support frame 21 remains unchanged, the pulling force of the support frame 21 on the two layers of sound insulation materials is constant, which effectively prevents the sound insulation materials from being subjected to excessive tensile stress and effectively improves product quality and yield rate.

[0082] In the sixth step, the lower part of the material-stroking plate 33 moves to abut against the lower side surface of the fixed mold, and the movable mold pushes the material-stroking plate 33 to deflect away from the fixed mold. Then the movable mold moves to close the mold with the fixed mold to perform hot pressing molding on the two layers of sound insulation materials.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0085] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0086] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adsorption shaping tool for hot pressing of automobile sound insulation products, comprising a plurality of adsorption air channels provided on a fixed mold, characterized in that: The tooling also includes a limiting mechanism for dynamically limiting the sound insulation material, and a shaping mechanism for pressing the sound insulation material to make it fit on the fixed mold; The limiting mechanism includes a carrying frame, a plurality of connecting components are provided on the upper side of the carrying frame, an insertion rod and a limiting tube are provided on the connecting component, a pointed rod is provided on the inner side of the limiting tube for sliding up and down, and a pulling component for pulling the insertion rod and the limiting tube with equal force is provided on the carrying frame; The shaping mechanism includes a plurality of square pillars, and a material-stroking plate is provided on the lower side of the square pillars through a connecting rod assembly; When the sound insulation material is hot-pressed, two layers of sound insulation material are inserted into the insertion rod and the limiting tube respectively. Then the connecting rod assembly drives the material-feeding plate to push the sound insulation material to fit the curved corner of the fixed mold. With the negative pressure in the adsorption airway, the sound insulation material is adsorbed and shaped. The insertion rod and the limiting tube move adaptively with the retraction of the material to prevent wrinkles and deformation. The connecting assembly includes a first slide and a second slide which are slidably arranged on the carrier frame in a direction perpendicular to the corresponding frame of the carrier frame, the first slide is hinged to the corresponding insertion rod, and the second slide is fixedly connected to the corresponding limit tube; The lower end of the pointed rod is fixedly installed with a linkage plate through a connecting rod, and a locking rod for inserting into the hinge of the insertion rod is fixedly installed on the side of the linkage plate away from the connecting rod, and a second torsion spring is provided between the insertion rod and the first slide plate.

2. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 1, characterized in that: The pulling assembly includes a counterweight frame that slides up and down on the outside of the carrying frame. An L-shaped bracket corresponding to the No. 1 slide is fixedly installed on the outside of the carrying frame, and a fixed pulley is fixedly installed on the upper side of the vertical section of the L-shaped bracket.

3. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 2, characterized in that: The pulling assembly also includes a movable pulley, a No. 1 steel wire rope is wound around the outer side of the movable pulley sheave, and its two ends are fixedly connected to the corresponding No. 1 slide and No. 2 slide respectively. The pulley frame of the movable pulley is fixedly connected to the counterweight frame through a No. 2 steel wire rope wound around the outer side of the fixed pulley sheave.

4. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 1, characterized in that: The upper edge of the limiting tube is provided with a chamfer having the same slope as the conical structure of the pointed rod.

5. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 1, characterized in that: Two toggle plates extending radially along the pointed rod to the outside of the corresponding limiting tubes are fixedly installed on the outside of the pointed rod, and a tension spring is provided between the lower end of the pointed rod and the limiting tube.

6. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 1, characterized in that: A semicircular groove is provided on the outer side of the pointed rod, and a limiting block is provided on the outer side of the limiting tube for radial sliding. The part of the limiting block close to the axis of the pointed rod is a hemispherical structure, and a push spring is provided between the limiting block and the limiting tube.

7. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 1, characterized in that: A plurality of pressing plates are hinged at equal intervals along the circumference of the upper side of the limiting tube. A No. 1 torsion spring is arranged between the pressing plate and the limiting tube. The hinge axis of the pressing plate and the pointed rod are connected by a nylon wire.

8. The adsorption shaping tool for hot pressing of automobile sound insulation products according to claim 1, characterized in that: The connecting rod assembly includes a lifting plate that slides up and down on a square pillar. A linear groove is opened on the upper side of the material-stroking plate. The upper end of the lifting plate cooperates with the linear groove of the material-stroking plate. A sliding square rod is hinged in the middle of the material-stroking plate. The sliding square rod is slidably connected to the lifting plate along its length direction.

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