A constant temperature pre-treatment PVC foaming production line embossing equipment

Abstract

This invention discloses an embossing device for a PVC foaming production line with constant temperature pretreatment, relating to the field of waste plastic recycling technology. It includes a single-section conveyor belt, a roller pressing device, a double-section conveyor belt, a pre-inspection device, and a pre-arching device. The pre-arching device induces a reverse pre-arch in the sheet material, offsetting the bending of subsequent embossing, reducing the risk of warping and springback after embossing, and improving the flatness of the finished product. The pre-inspection device converts the arch height of the sheet material into a voltage signal, enabling real-time detection of the pre-arch degree; it also provides real-time data support for the control system to adjust the gap of the roller pressing device, ensuring the flatness of the finished product. The flexible roller converts friction into rolling, reducing the risk of scratches on the sheet material surface. A negative pressure measuring rod, in conjunction with a suction device, removes dust and impurities from the sheet material surface, reducing embossing pitting, scratches, and texture loss caused by inclusions; the suction device also uses backflushing to precisely discharge dust and impurities from the negative pressure measuring rod, achieving self-cleaning and reducing clogging and maintenance frequency.

Description

Technical Field

[0001] This invention relates to the field of waste plastic recycling technology, specifically to an embossing device for a PVC foaming production line with constant temperature pretreatment. Background Technology

[0002] PVC foam board is a type of sheet material made from polyvinyl chloride (PVC) as a matrix, formed through a foaming process to create a lightweight, porous structure. It features light weight, good dimensional stability, corrosion resistance, moisture resistance, mildew resistance, and ease of processing. With increasing demands for green manufacturing and resource recycling, a certain proportion of recycled waste plastics is being gradually incorporated into the production of PVC foam boards. While reducing raw material costs and resource consumption, this also leads to more pronounced fluctuations in the board's flowability, foaming uniformity, and surface condition. Therefore, the need for adaptability and stable control of the production process is constantly increasing.

[0003] When existing PVC foam board embossing equipment uses a single-sided embossing process, the embossing roller applies heat and pressure to only one side of the board, resulting in a significant difference in temperature and stress deformation between the two sides. The surface of the embossed side is more prone to springback and shrinkage under the combined action of heat and pressure, while the back side is not sufficiently heated and compressed. During the cooling and shaping process, the shrinkage and springback of the two sides are not synchronized, leading to an imbalance in the distribution of residual stress inside the board. As a result, after exiting the roller, it is prone to curling, warping and other deformations, affecting the flatness of the board and adversely affecting subsequent bonding, cutting and assembly. Summary of the Invention

[0004] The purpose of this invention is to provide an embossing device for a PVC foaming production line with constant temperature pretreatment, so as to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: the embossing equipment includes a roller pressing device, a pre-inspection device, and a pre-arching device. A single-section conveyor belt is installed on one side of the roller pressing device, and a double-section conveyor belt is installed on the other side of the roller pressing device. The pre-inspection device includes an inspection mechanism and a negative pressure lifting assembly. The inspection mechanism is mounted on the support of the dual-section conveyor belt, and the negative pressure lifting assembly is mounted on the inspection mechanism. The pre-arching device includes an adjustment mechanism, which is mounted on a support of the dual-section conveyor belt, and a three-roller assembly is rotatably mounted on the adjustment mechanism.

[0006] The embossing equipment is connected to an external control box, which contains a control system for operating the entire embossing machine. Below the roller pressing device is a smooth support roller, and above it is a patterned embossing roller. These two rollers rotate synchronously and work together to emboss the surface of the PVC foam board. A temperature control module is installed inside the embossing roller to maintain a constant temperature, preventing temperature fluctuations from affecting the embossing quality.

[0007] Furthermore, the detection mechanism includes an end seat, which is mounted on a support of the dual-section conveyor belt. An elastic component is slidably mounted on the end seat, and a detection element is installed between the end seat and the elastic component. The elastic component is connected to the negative pressure lifting component. The adjustment mechanism includes two connecting parts, which are symmetrically mounted on the support of the double-section conveyor belt, and a drive adjustment component is mounted on the connecting parts; The three-roll assembly includes a shaping roller and two upper pressure rollers, with the upper pressure rollers rotatably mounted between the drive adjustment components and the shaping roller rotatably mounted between the connecting components.

[0008] The bottom shaping roller and the two upper pressure rollers form a three-roller pre-pressing and shaping structure. After the PVC foam board enters the pre-arching device, the control system starts the rotary motor. The output shaft of the rotary motor drives the transmission gear to rotate, and the transmission gear drives the shaping roller to rotate through the drive gear. The shaping roller continuously supports and pulls the board. The two upper pressure rollers form symmetrical pressing areas in the width direction of the board. Under the pressure of the upper pressure rollers, the PVC foam board bends and adheres to the upper surface of the shaping roller, causing the PVC foam board to form an upward arch, thereby achieving the effect of reverse pre-arching.

[0009] Furthermore, the negative pressure lifting assembly includes a negative pressure probe, which is connected to a suction device via a pipe, and both ends of the negative pressure probe are connected to an elastic component; The drive adjustment component includes an adjustment module, a drive module, and two adjustment rods. The adjustment module and the drive module are both mounted on the connector. The two adjustment rods are symmetrically and rotatably mounted on the connector. The two adjustment rods mesh with each other for transmission. The adjustment module meshes with the adjustment rods for transmission. One end of the shaping roller is equipped with a drive gear. The drive module meshes with the drive gear for transmission. The upper pressure roller is rotatably mounted on the adjustment rod.

[0010] Furthermore, the detection element includes an iron core and a coil assembly, with the iron core mounted at the bottom of the slide rod and the coil assembly disposed within the end seat.

[0011] The iron core is a soft magnetic core, and the coil group includes a primary excitation coil in the middle and two secondary induction coils symmetrically arranged on both sides. The two secondary induction coils are connected in reverse series.

[0012] Furthermore, the elastic component includes a measuring cap, which has a sliding rod inside. The measuring cap is slidably mounted on the end seat, and a spring is installed between the measuring cap and the end seat. A connecting rod is installed on the measuring cap, and the two ends of the negative pressure measuring rod are connected to the connecting rod of the elastic component.

[0013] After the PVC foam board pre-arching process is completed, it is conveyed into the pre-inspection device by a dual-stage conveyor. The end of the PVC foam board is lifted by a flexible roller, which lifts the negative pressure measuring rod. As the PVC foam board moves, the friction between the flexible roller and the surface of the PVC foam board is converted into its own rotation, thus avoiding scratches on the surface of the board. When the negative pressure measuring rod is lifted, it drives the measuring cap to slide upward along the end seat through the connecting rod. The spring is stretched, and the measuring cap drives the iron core to move upward in the coil group through the sliding rod. The control system analyzes the voltage signal to detect the arching height of the board and realizes real-time detection of the pre-arching degree.

[0014] Furthermore, the negative pressure measuring rod is provided with a negative pressure chamber, and the top of the negative pressure measuring rod is provided with several connection ports, which are connected to the negative pressure chamber. The connection ports are connected to a suction device through pipes. The bottom of the negative pressure measuring rod is provided with a suction nozzle, which is connected to the negative pressure chamber. A flexible roller is rotatably installed at the bottom of the negative pressure measuring rod.

[0015] The suction device can output or discharge gas into the negative pressure chamber through a pipe. A filter screen is installed at the connection port to trap dust and impurities inside the nozzle. The nozzle opening is matched to the size of the collection chamber opening.

[0016] During the passage of the board, the control system keeps the suction device on at all times. The suction device removes the air from the negative pressure chamber through the pipeline, keeping the negative pressure chamber under negative pressure. The suction nozzle continuously removes dust and impurities adhering to the surface of the PVC foam board through the negative pressure suction, ensuring the cleanliness of the PVC foam board entering the roller pressing device and avoiding the deterioration of the embossing quality due to the adhering substances.

[0017] When the PVC foam board passes through, the spring rebounds, causing the test cap to reset, the voltage signal to return to zero, the negative pressure test rod falls back, the nozzle aligns with the collection chamber, the control system opens the electric valve at the bottom of the collection chamber, and switches the suction device to the blowing mode. The suction device continuously blows air back into the negative pressure test rod through the pipe, so that dust and impurities in the nozzle enter the collection chamber and are discharged from the electric valve, realizing the self-cleaning of the negative pressure test rod and reducing clogging and maintenance frequency.

[0018] The control system adjusts the gap between the support roller and the embossing roller on the roller pressing device according to the detected pre-camber, so as to ensure that the curvature of the PVC foam board after embossing just cancels out the pre-camber, forming a flat finished product, reducing the risk of warping and rebound after embossing, and improving the flatness of the finished product.

[0019] Furthermore, the adjustment module includes an adjustment motor, which is mounted on the connector. An adjustment gear is mounted on the output shaft of the adjustment motor, and the adjustment gear meshes with the adjustment rod for transmission.

[0020] Furthermore, the adjusting rod includes an electric telescopic rod, on which a semi-toothed ring is installed. The semi-toothed rings mesh with each other for transmission, and the semi-toothed rings mesh with the adjusting gear for transmission. A rotating connector is installed on the output shaft of the electric telescopic rod, and the upper pressure roller is rotatably connected to the rotating connector.

[0021] Furthermore, the drive module includes a rotary motor, and a transmission gear is mounted on the output shaft of the rotary motor, with the drive gear meshing with the transmission gear for transmission.

[0022] The output shaft of the adjusting motor drives the adjusting gear to rotate, which in turn drives the adjusting rod to deflect via a half-tooth ring. The two adjusting rods mesh with each other through the half-tooth ring; therefore, when one adjusting rod deflects, it drives the other meshing adjusting rod to deflect synchronously at the opposite angle, achieving symmetrical deflection adjustment of the upper pressure roller relative to the shaping roller. The output shaft of the electric telescopic rod drives the upper pressure roller to move by rotating the connecting head, thereby adjusting the roller gap between the upper pressure roller and the shaping roller. The control system synchronously adjusts the deflection position of the upper pressure roller and the roller gap size based on process parameters such as the thickness and material of the PVC sheet, achieving the purpose of adjusting and controlling the pre-camber of the PVC sheet.

[0023] Furthermore, the pre-inspection device also includes a dust collection guide platform, which is installed on a dual-section conveyor belt. The top of the dust collection guide platform is equipped with a top platform, and a collection chamber is provided inside the dust collection guide platform. An electric valve is provided at the bottom of the collection chamber, and several anti-fall guide strips are provided at equal intervals at the top of the collection chamber. The two sides of the dust collection guide platform have an inward concave structure, and the dust collection guide platform is located below the negative pressure measuring rod. A constant temperature module is provided inside the roller pressing device.

[0024] The dual-section conveyor belt consists of front and rear conveyor belts, each driven by corresponding rotating rollers to provide continuous traction and conveying of the PVC foam board. A dust collection guide is installed between the two conveyor belts, with inwardly recessed fitting structures along both edges of the guide along the conveying direction. These recessed structures match the shape of the rotating rollers at the ends of adjacent conveyor belts, allowing the rollers, covered by the conveyor belts, to be fitted into the recessed space without contact. This ensures a continuous connection between the integrated guide and the two conveyor belts in terms of height and conveying path without interfering with the conveyor belt's operation. This enhances support and dust collection / guiding effects while maintaining the continuity of the conveying process, preventing the arched ends of the PVC foam board from protruding and getting stuck between the two conveyor belts.

[0025] In addition, the anti-fall strips arranged at intervals above the collection chamber ensure that the collection chamber is open while limiting and supporting the end of the PVC foam board, preventing the end of the board from entering the collection chamber, thereby further reducing the risk of jamming and improving the stability of conveying.

[0026] Compared with the prior art, the beneficial effects of the present invention are: 1. The two upper pressure rollers rotate synchronously in opposite directions through semi-tooth ring meshing. The upper pressure rollers form a symmetrical pressing zone relative to the shaping roller, resulting in balanced force during the pre-arching process and more precise and repeatable pre-arch adjustment. The electric telescopic rod allows for adjustable gap between the upper pressure rollers and the shaping roller. Combined with the symmetrical deflection adjustment of the upper pressure rollers, the pre-pressing and shaping parameters can be adaptively matched according to the thickness and material of the sheet material, reducing manual adjustments and fluctuations.

[0027] 2. The pre-arching device causes the board to arch in the opposite direction, which counteracts the bending of the subsequent embossing, reduces the risk of warping and springback after embossing, and improves the flatness of the finished product.

[0028] 3. The pre-inspection device converts the camber height of the sheet material into a voltage signal, enabling real-time detection of the pre-camber; it also provides real-time data support for the control system to adjust the gap of the roller pressing device, ensuring the flatness of the finished product. The flexible roller converts friction into rolling, reducing the risk of scratching the surface of the sheet material.

[0029] 4. The negative pressure probe, in conjunction with the suction device, removes dust and impurities from the surface of the board, reducing pitting, scratches, and texture loss caused by inclusions; the suction device is used to back-blown out the dust and impurities inside the negative pressure probe, achieving self-cleaning of the negative pressure probe and reducing clogging and maintenance frequency.

[0030] 5. The concave structure of the dust collection guide platform ensures a continuous transition in height and path with the preceding and following conveyor belts, improving the continuity and stability of cross-section conveying of the sheet metal. The anti-fall guide strip above the collection chamber keeps the chamber open for dust collection while simultaneously limiting and supporting the ends of the sheet metal to prevent them from falling into the collection chamber and causing blockage. Attached Figure Description

[0031] Figure 1 This is a three-dimensional view of the embossing equipment of the present invention; Figure 2 This is a perspective view of the pre-inspection device of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a portion of region A in the middle; Figure 4 This is a perspective view of the testing mechanism of the present invention; Figure 5 This is a perspective view of the negative pressure measuring rod of the present invention; Figure 6 This is a perspective view of the pre-arching device of the present invention; Figure 7 For the present invention Figure 6 A magnified view of a portion of region B in the middle; Figure 8 This is a perspective view of the adjusting rod of the present invention.

[0032] In the diagram: 1. Single-section conveyor belt; 2. Roller pressing device; 3. Double-section conveyor belt; 4. Pre-inspection device; 5. Pre-arching device; 41. Dust collection guide; 42. Detection mechanism; 43. Negative pressure measuring rod; 411. Collection chamber; 412. Anti-fall guide bar; 413. Top platform; 421. Connecting rod; 422. Measuring cap; 423. End seat; 424. Spring; 4221. Slide rod; 4222. Iron core; 4231. Coil group; 4 31. Negative pressure chamber; 432. Connection port; 433. Flexible roller; 434. Suction nozzle; 51. Connector; 52. Shaping roller; 53. Upper pressure roller; 54. Drive adjustment component; 541. Rotary motor; 542. Transmission gear; 543. Adjustment motor; 544. Adjustment rod; 545. Drive gear; 546. Adjustment gear; 5441. Electric telescopic rod; 5442. Rotary connector; 5443. Semi-tooth ring. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1-8 As shown, the present invention provides a technical solution for embossing equipment in a PVC foaming production line with constant temperature pretreatment: the embossing equipment includes a roller pressing device 2, a pre-inspection device 4, and a pre-arching device 5. A single-section conveyor belt 1 is installed on one side of the roller pressing device 2, and a double-section conveyor belt 3 is installed on the other side of the roller pressing device 2; the pre-inspection device 4 includes a detection mechanism 42 and a negative pressure lifting assembly. The detection mechanism 42 is installed on the support of the double-section conveyor belt 3, and the negative pressure lifting assembly is installed on the detection mechanism 42; the pre-arching device 5 includes an adjustment mechanism, which is installed on the support of the double-section conveyor belt 3, and a three-roller assembly is rotatably installed on the adjustment mechanism.

[0035] The embossing equipment is connected to an external control box, which contains a control system for operating the entire embossing equipment. Below the roller pressing device 2 is a smooth support roller, and above it is a patterned embossing roller. The two rotate synchronously and work together to emboss the upper surface of the PVC foam board. The embossing roller is equipped with a temperature control module to maintain a constant temperature and prevent temperature fluctuations from affecting the embossing quality.

[0036] The detection mechanism 42 includes an end seat 423, which is mounted on the support of the double-section conveyor belt 3. An elastic component is slidably mounted on the end seat 423. A detection element is installed between the end seat 423 and the elastic component. The elastic component is connected to the negative pressure lifting component. The adjustment mechanism includes two connecting parts 51, which are symmetrically mounted on the support of the double-section conveyor belt 3. A drive adjustment component 54 is mounted on the connecting parts 51. The three-roll assembly includes a shaping roller 52 and two upper pressure rollers 53. The upper pressure rollers 53 are rotatably mounted between the drive adjustment components 54, and the shaping rollers 52 are rotatably mounted between the connecting parts 51.

[0037] The negative pressure lifting assembly includes a negative pressure measuring rod 43, which is connected to a suction device via a pipe. Both ends of the negative pressure measuring rod 43 are connected to an elastic component. The drive adjustment component 54 includes an adjustment module, a drive module, and two adjustment rods 544. The adjustment module and the drive module are both mounted on the connector 51. The two adjustment rods 544 are symmetrically and rotatably mounted on the connector 51. The two adjustment rods 544 mesh with each other for transmission. The adjustment module meshes with the adjustment rods 544 for transmission. One end of the shaping roller 52 is equipped with a drive gear 545. The drive module meshes with the drive gear 545 for transmission. The upper pressure roller 53 is rotatably mounted on the adjustment rods 544.

[0038] The detection element includes an iron core 4222 and a coil assembly 4231. The iron core 4222 is installed at the bottom of the slide bar 4221, and the coil assembly 4231 is located inside the end seat 423.

[0039] The iron core 4222 is a soft magnetic core 4222, and the coil group 4231 includes a primary excitation coil located in the middle and two secondary induction coils symmetrically arranged on both sides. The two secondary induction coils are connected in reverse series.

[0040] During operation, an alternating magnetic field is generated by passing an AC signal through the primary excitation coil. The axial movement of the iron core 4222 within the coil assembly alters the magnetic reluctance distribution along the magnetic flux path, causing the induced voltage in one secondary coil to increase while decreasing on the other. The output of the two secondary coils, connected in reverse series, is the difference between the two values. This voltage difference disrupts the zero-point equilibrium, and its amplitude is linearly proportional to the displacement of the iron core 4222. The control system analyzes the voltage signal to detect the displacement of the iron core 4222, and then calculates the arching height of the plate.

[0041] The elastic component includes a measuring cap 422, a sliding rod 4221 inside the measuring cap 422, the measuring cap 422 is slidably mounted on the end seat 423, a spring 424 is installed between the measuring cap 422 and the end seat 423, a connecting rod 421 is installed on the measuring cap 422, and the two ends of the negative pressure measuring rod 43 are connected to the connecting rod 421 of the elastic component.

[0042] The pre-inspection device 4 also includes a dust collection guide 41, which is installed on the double-section conveyor belt 3. The top of the dust collection guide 41 is provided with a top platform 413, and a collection chamber 411 is provided inside the dust collection guide 41. An electric valve is provided at the bottom of the collection chamber 411. Several anti-fall guide strips 412 are provided at equal intervals at the top of the collection chamber 411. The two sides of the dust collection guide 41 have a concave structure, and the dust collection guide 41 is located below the negative pressure measuring rod 43.

[0043] The dual-section conveyor belt 3 has two sections, front and rear, each driven by a corresponding rotating roller to provide continuous traction and conveying of the PVC foam board. A dust collection guide 41 is installed between the two sections of the conveyor belt. The dust collection guide 41 has inwardly recessed fitting structures on both sides of its conveying direction. The recessed structure matches the shape of the rotating roller at the end of the adjacent conveyor belt, allowing the rotating roller covered by the conveyor belt to be fitted into the recessed space in a non-contact manner. This ensures a continuous connection between the integrated guide and the two sections of the conveyor belt in terms of height and conveying path without interfering with the operation of the conveyor belt. While increasing the support and dust collection and guiding effect, this ensures the continuity of the conveying process and prevents the arched end of the PVC foam board from protruding and getting stuck between the two sections of the conveyor belt.

[0044] In addition, the anti-fall strips arranged at intervals above the collection chamber 411 ensure that the collection chamber 411 is open while limiting and supporting the end of the PVC foam board, preventing the end of the board from entering the collection chamber 411, thereby further reducing the risk of jamming and improving the stability of conveying.

[0045] The negative pressure measuring rod 43 has a negative pressure chamber 431 inside. The top of the negative pressure measuring rod 43 has several connection ports 432, which are connected to the negative pressure chamber 431. The connection ports 432 are connected to a suction device through pipes. The bottom of the negative pressure measuring rod 43 has a suction nozzle 434, which is connected to the negative pressure chamber 431. A flexible roller 433 is rotatably installed at the bottom of the negative pressure measuring rod 43.

[0046] The suction device can supply or discharge gas into the negative pressure chamber 431 through a pipe. A filter screen is provided at the connection port 432 to block dust and impurities in the suction nozzle 434. The opening of the suction nozzle 434 is matched to the opening of the collection chamber 411.

[0047] The adjustment module includes an adjustment motor 543, which is mounted on a connector 51. An adjustment gear 546 is mounted on the output shaft of the adjustment motor 543, and the adjustment gear 546 meshes with the adjustment rod 544 for transmission.

[0048] The adjusting rod 544 includes an electric telescopic rod 5441, on which a semi-toothed ring 5443 is mounted. The semi-toothed rings 5443 mesh with each other for transmission. The semi-toothed rings 5443 mesh with the adjusting gear 546 for transmission. A rotating connector 5442 is mounted on the output shaft of the electric telescopic rod 5441. The upper pressure roller 53 is rotatably connected to the rotating connector 5442.

[0049] The drive module includes a rotary motor 541, and a transmission gear 542 is mounted on the output shaft of the rotary motor 541. The drive gear 545 meshes with the transmission gear 542 for transmission.

[0050] The output shaft of the adjusting motor 543 drives the adjusting gear 546 to rotate, and the adjusting gear 546 drives the adjusting rod 544 to deflect through the half-tooth ring 5443. The two adjusting rods 544 mesh with each other through the half-tooth ring 5443. Therefore, when one adjusting rod 544 deflects, it drives the other adjusting rod 544 meshing with it to deflect synchronously at the opposite angle, so that the upper pressure roller 53 achieves symmetrical deflection adjustment relative to the shaping roller 52. The output shaft of the electric telescopic rod 5441 drives the upper pressure roller 53 to move by rotating the connecting head 5442, thereby adjusting the roller gap between the upper pressure roller 53 and the shaping roller 52. The control system synchronously adjusts the deflection position and roller gap of the upper pressure roller 53 according to the process parameters such as the thickness and material of the PVC sheet, achieving the purpose of adjusting and controlling the pre-camber of the PVC sheet. The working principle of this invention is as follows: The bottom shaping roller 52 and the two upper pressure rollers 53 form a three-roller pre-pressing and shaping structure. After the PVC foam board enters the pre-arching device 5, the control system starts the rotary motor 541. The output shaft of the rotary motor 541 drives the transmission gear 542 to rotate. The transmission gear 542 drives the shaping roller 52 to rotate through the drive gear 545. The shaping roller 52 continuously supports and pulls the board. The two upper pressure rollers 53 form symmetrical pressing areas in the width direction of the board. Under the pressure of the upper pressure rollers 53, the PVC foam board bends and adheres to the upper surface of the shaping roller 52, causing the PVC foam board to form an upward arch, thereby achieving the effect of reverse pre-arching.

[0051] After the PVC foam board is pre-arched, it is conveyed into the pre-inspection device 4 by the dual-section conveyor belt 3. The end of the PVC foam board is lifted by the negative pressure measuring rod 43 through the flexible roller 433. As the PVC foam board moves, the friction between the flexible roller 433 and the surface of the PVC foam board is converted into its own rotation, thereby avoiding scratches on the surface of the board. When the negative pressure measuring rod 43 is lifted, the measuring cap 422 is driven to slide upward along the end seat 423 through the connecting rod 421. The spring 424 is stretched. The measuring cap 422 drives the iron core 4222 to move upward in the coil group 4231 through the sliding rod 4221. The control system detects the arching height of the board by analyzing the voltage signal.

[0052] During the passage of the PVC foam board, the control system keeps the suction device constantly activated. The suction device removes air from the negative pressure chamber 431 through the pipe, maintaining a negative pressure in the chamber. The suction nozzle 434 continuously removes dust and impurities adhering to the surface of the PVC foam board using the negative pressure suction, ensuring the cleanliness of the PVC foam board before it enters the roller pressing device 2 and preventing the adhering substances from reducing the embossing quality. When the PVC foam board passes through, the spring 424 rebounds, causing the test cap 422 to reset, the voltage signal to zero, the negative pressure test rod 43 falls back, and the suction nozzle 434 aligns with the collection chamber 411. The control system opens the electric valve at the bottom of the collection chamber 411 and switches the suction device to air blowing mode. The suction device continuously back-blowing air into the negative pressure test rod 43 through the pipe, causing dust and impurities in the suction nozzle 434 to enter the collection chamber 411 and be discharged from the electric valve.

[0053] The control system adjusts the gap between the support roller and the embossing roller on the roller pressing device 2 according to the detected pre-camber, so as to ensure that the curvature of the PVC foam board after embossing just cancels out the pre-camber, forming a flat finished product.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An embossing device for a constant-temperature pretreatment PVC foaming production line, characterized in that: The embossing equipment includes a roller pressing device (2), a pre-inspection device (4) and a pre-arching device (5). A single-section conveyor belt (1) is installed on one side of the roller pressing device (2), and a double-section conveyor belt (3) is installed on the other side of the roller pressing device (2). The pre-inspection device (4) includes an inspection mechanism (42) and a negative pressure lifting assembly. The inspection mechanism (42) is installed on the support of the double-section conveyor belt (3), and the negative pressure lifting assembly is installed on the inspection mechanism (42). The pre-arching device (5) includes an adjustment mechanism, which is mounted on a support of the double-section conveyor belt (3), and a three-roller assembly is rotatably mounted on the adjustment mechanism.

2. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 1, characterized in that: The detection mechanism (42) includes an end seat (423), which is mounted on a support of the double-section conveyor belt (3). An elastic component is slidably mounted on the end seat (423), and a detection element is installed between the end seat (423) and the elastic component. The elastic component is connected to the negative pressure lifting component. The adjustment mechanism includes two connectors (51), which are symmetrically mounted on the support of the double-section conveyor belt (3). A drive adjustment component (54) is mounted on the connector (51). The three-roll assembly includes a shaping roller (52) and two upper pressure rollers (53), the upper pressure rollers (53) being rotatably mounted between drive adjustment members (54), and the shaping roller (52) being rotatably mounted between connectors (51).

3. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 2, characterized in that: The negative pressure lifting assembly includes a negative pressure probe (43), which is connected to a suction device via a pipe. Both ends of the negative pressure probe (43) are connected to an elastic component. The drive adjustment component (54) includes an adjustment module, a drive module, and two adjustment rods (544). The adjustment module and the drive module are both mounted on the connector (51). The two adjustment rods (544) are symmetrically and rotatably mounted on the connector (51). The two adjustment rods (544) mesh with each other for transmission. The adjustment module meshes with the adjustment rods (544) for transmission. One end of the shaping roller (52) is equipped with a drive gear (545). The drive module meshes with the drive gear (545) for transmission. The upper pressure roller (53) is rotatably mounted on the adjustment rods (544).

4. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 2, characterized in that: The detection element includes an iron core (4222) and a coil assembly (4231). The iron core (4222) is installed at the bottom of the slide bar (4221), and the coil assembly (4231) is located inside the end seat (423).

5. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 3, characterized in that: The elastic component includes a measuring cap (422), a sliding rod (4221) is provided inside the measuring cap (422), the measuring cap (422) is slidably mounted on the end seat (423), a spring (424) is installed between the measuring cap (422) and the end seat (423), a connecting rod (421) is installed on the measuring cap (422), and the two ends of the negative pressure measuring rod (43) are connected to the connecting rod (421) of the elastic component.

6. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 3, characterized in that: The negative pressure measuring rod (43) is provided with a negative pressure chamber (431). The top of the negative pressure measuring rod (43) is provided with several connection ports (432). The connection ports (432) are connected to the negative pressure chamber (431). The connection ports (432) are connected to a suction device through a pipe. The bottom of the negative pressure measuring rod (43) is provided with a suction nozzle (434). The suction nozzle (434) is connected to the negative pressure chamber (431). A flexible roller (433) is rotatably installed at the bottom of the negative pressure measuring rod (43).

7. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 3, characterized in that: The adjustment module includes an adjustment motor (543), which is mounted on a connector (51). An adjustment gear (546) is mounted on the output shaft of the adjustment motor (543), and the adjustment gear (546) meshes with the adjustment rod (544) for transmission.

8. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 7, characterized in that: The adjusting rod (544) includes an electric telescopic rod (5441), on which a semi-toothed ring (5443) is mounted. The semi-toothed rings (5443) mesh with each other for transmission. The semi-toothed rings (5443) mesh with the adjusting gear (546) for transmission. A rotating connector (5442) is mounted on the output shaft of the electric telescopic rod (5441). The upper pressure roller (53) is rotatably connected to the rotating connector (5442).

9. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 3, characterized in that: The drive module includes a rotary motor (541), and a transmission gear (542) is mounted on the output shaft of the rotary motor (541). The drive gear (545) meshes with the transmission gear (542) for transmission.

10. The embossing equipment for a constant-temperature pretreatment PVC foaming production line according to claim 1, characterized in that: The pre-inspection device (4) also includes a dust collection guide (41), which is installed on a double-section conveyor belt (3). The top of the dust collection guide (41) is provided with a top platform (413). The dust collection guide (41) is provided with a collection chamber (411). The bottom of the collection chamber (411) is provided with an electric valve. The top of the collection chamber (411) is provided with several anti-fall guide strips (412) at equal intervals. The two sides of the dust collection guide (41) are concave structures. The dust collection guide (41) is located below the negative pressure measuring rod (43). The roller pressing device (2) is provided with a constant temperature module.

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