A fully automatic silica gel extruder

Abstract

The application discloses a full-automatic silica gel extruder, and relates to the technical field of extruders, which comprises a screw extruding mechanism, an extruding die, a power mechanism and a control system, and further comprises a negative pressure feeding assembly located at a feeding end of the screw extruding mechanism, which is used for silica gel strip rolling negative pressure feeding. When the application is used, the first motor is started to drive the feeding roller to rotate anticlockwise on the outer surface of the inner negative pressure cover, to drag the silica gel strip downward, while the external air source generates suction force to suck the gas in the inner negative pressure cover through the pipeline and the negative pressure pipe, so that a negative pressure cavity is formed inside the inner negative pressure cover, and the feeding side of the feeding roller is provided with stable negative pressure suction force through the negative pressure hole, so that the silica gel strip is firmly adsorbed and adheres to the roller surface, and is forced to be dragged for feeding along with the rotation of the roller surface. On the basis of the negative pressure feeding assembly, the silica gel strip is actively adsorbed to prevent slipping and deviation, and active grabbing and accurate conveying are realized.

Description

Technical Field

[0001] This invention relates to the field of extruder technology, specifically to a fully automatic silicone extruder. Background Technology

[0002] A silicone extruder is a specialized machine designed for solid or liquid silicone. Through heating, pressurization, and screw feeding, the silicone is extruded from a mold of a specific shape, continuously producing silicone products with a fixed cross-sectional shape. It is a sub-type of rubber extruder, distinct from ordinary plastic extruders. It features temperature and corrosion resistance, and its sealed structure is adapted to the vulcanization characteristics of silicone. Fully automatic silicone extruders can produce silicone products with precise dimensions and smooth surfaces, offering high production efficiency.

[0003] Medical-grade silicone tubing is widely used in the medical field due to its non-toxic, high-temperature resistant, corrosion resistant, and biocompatible properties. The production of medical-grade silicone tubing requires extremely high precision, and every step of the production process must be strictly controlled, especially the feeding of solid silicone.

[0004] Currently, fully automatic silicone extruders used in the production of medical-grade silicone tubing typically employ a feeding roller to forcibly drag and press solid silicone raw materials, precisely feeding the silicone into the screw barrel for extrusion. However, in actual production, because the feeding roller is usually a smooth metal roller, and the silicone strip has a smooth and soft surface, slippage can easily occur during feeding, leading to unstable feeding volume, intermittent feeding, or even material breakage. This, in turn, causes quality defects such as uneven wall thickness and out-of-tolerance dimensions in the extruded tubing, failing to meet the precision requirements of medical-grade products.

[0005] Therefore, we propose a fully automatic silicone extruder to solve the problems mentioned in the background section. Summary of the Invention

[0006] The purpose of this invention is to provide a fully automatic silicone extruder to solve the problem that, in the production of medical-grade silicone tubes using the fully automatic silicone extruders mentioned in the background art, slippage easily occurs between the feed roller and the silicone, leading to unstable feeding, intermittent feeding, or even material breakage, which in turn results in poor quality of the extruded tubes and fails to meet the precision requirements of medical-grade products.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A fully automatic silicone extruder includes a screw extrusion mechanism, an extrusion die, a power mechanism, and a control system, and further includes: A negative pressure feeding assembly is located at the feeding end of the screw extrusion mechanism. The negative pressure feeding assembly is used for rolling negative pressure feeding of silicone strips. A cleaning component is located on the outer surface of the negative pressure feeding component, and the cleaning component is used to clean residual material from the surface of the feeding roller. Adjustment component, used to adjust the negative pressure contact area between the negative pressure feeding component and the silicone strip; The negative pressure feeding assembly includes a feeding roller and a first motor. The outer surface of the feeding roller is provided with several negative pressure holes. An inner negative pressure cover is provided inside the feeding roller. A negative pressure pipe is fixedly connected to one side of the outer surface of the inner negative pressure cover. One end of the negative pressure pipe is connected to an air source through a pipe to form negative pressure inside the inner negative pressure cover.

[0008] Preferably, bearings are provided at both ends of the feeding roller, the output end of the first motor is fixedly connected to one end of the feeding roller, one end of the negative pressure pipe is connected to a first pressure regulating valve through a flange, one end of the first pressure regulating valve is connected to a connecting pipe through a flange, a fixing sleeve is fixedly installed on the outer surface of the inner negative pressure cover, and one end of the fixing sleeve extends movably through to the outer surface of the feeding roller, and a fixing block is fixedly installed on one end of the fixing sleeve.

[0009] Preferably, the cleaning assembly includes an outer negative pressure cover, with multiple multi-pipe fittings fixedly connected to the outer surface of the outer negative pressure cover, and an arc-shaped pipe fixedly connected to the outer surface of the multiple multi-pipe fittings. One end of the arc-shaped pipe is connected to a flexible hose via a threaded fitting, and one end of the flexible hose is connected to a second pressure regulating valve via an outer connecting pipe. One end of the second pressure regulating valve is fixedly connected to a suction pipe, and one end of the connecting pipe is fixedly connected to the suction pipe. One end of the suction pipe is connected to a vacuum pump via a telescopic pipe.

[0010] Preferably, a filter screen is provided inside the outer negative pressure cover, and multiple silicone scrapers are fixedly installed inside the filter screen. The outer surface of the silicone scrapers is in contact with the outer surface of the feeding roller. Multiple buckles are fixedly installed at the edge of the inner wall of the outer negative pressure cover, and multiple locking holes are opened at the edge of the outer surface of the filter screen. Each buckle is movably embedded in the locking hole.

[0011] Preferably, the adjustment assembly includes a base frame and a movable frame. Adjustment shafts are fixedly installed at the bottom of the outer surfaces on both sides of the movable frame. A second motor is fixedly installed at the top of the base frame, and a rotating shaft is fixedly installed at the output end of the second motor.

[0012] Preferably, two levers are fixedly installed on the outer surface of the rotating shaft, and the outer surfaces of the two adjusting shafts are respectively movably embedded in the two levers. The extrusion die is installed at the output end of the screw extrusion mechanism through a connector, and the output end of the power mechanism is connected to the input end of the screw extrusion mechanism.

[0013] Preferably, two fixing strips are fixedly installed on the rear surface of the bottom of the movable frame, and a scraper is fixedly installed between the two fixing strips, with the scraper in contact with the outer surface of the feeding roller.

[0014] Preferably, a limiting block is fixedly installed at the top edge of the base frame, one end of the rotating shaft is movably embedded in the outer surface of the limiting block, and two slide rails are movably embedded in the bottom of the movable frame, with the bottom of the two slide rails mounted on the top of the base frame by a reinforcing rod.

[0015] Preferably, the outer surface of the fixing block is fixedly installed on one side of the outer surface of the movable frame, the outer surfaces of the negative pressure pipe and the connecting pipe are both fixedly installed with auxiliary blocks, and the auxiliary blocks are fixedly installed on one side of the outer surface of the movable frame. The first motor is installed on the other side of the outer surface of the movable frame through an auxiliary plate, and the outer surfaces of the two bearings are both fixedly installed inside the movable frame.

[0016] Preferably, a limiting groove is provided at the center of the top of the mobile frame, a retaining ring is fixedly installed on the outer surface of the hose, the retaining ring is movably embedded in the limiting groove, the outer surface of the suction pipe is installed at the edge of the bottom surface inside the mobile frame through an auxiliary frame, mounting blocks are fixedly installed on both outer surfaces of the outer negative pressure cover, two sliding grooves are provided at the top of the mobile frame, the outer surfaces of the two mounting blocks are movably embedded in the two sliding grooves respectively, and the mounting blocks are connected to the mobile frame by hand-tightened bolts.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. In use, the first motor starts, driving the feeding roller to rotate counterclockwise on the outer surface of the inner negative pressure shroud, dragging the silicone strip downwards. Simultaneously, an external air source generates suction, drawing gas from the inner negative pressure shroud through pipes and negative pressure tubes, creating a negative pressure chamber inside the shroud. This negative pressure, through negative pressure holes, provides stable suction only to the feeding side of the feeding roller, firmly adhering the silicone strip to the roller surface. As the roller rotates, the silicone strip is forcibly dragged and fed. Based on the negative pressure feeding assembly, the active adsorption of the silicone strip achieves negative pressure-assisted material gripping, preventing slippage and deviation, and achieving active gripping and precise conveying.

[0018] 2. In use, the vacuum pump is activated, generating suction to draw air from inside the outer negative pressure shroud through connecting pipes, forming a negative pressure chamber. The feeding roller rotates to the outer negative pressure zone, adsorbing any residual silica gel adhering to the negative pressure holes. The negative pressure holes remain unobstructed to facilitate subsequent stable negative pressure material handling. The filter screen collects the adsorbed silica gel particles and is removable for cleaning and reuse.

[0019] 3. When using this invention, the negative pressure feeding component and the cleaning component work together, with independent negative pressure zones inside and outside. One side realizes negative pressure feeding, and the other side realizes micropore self-cleaning. The two work together in a coordinated manner without interfering with each other, further improving the stability and continuity of feeding by the feeding roller.

[0020] 4. When using this invention, the scraper removes the silicone material adhering to the roller surface for the first cleaning, and then the roller surface is cleaned again by multiple silicone scrapers. The two work together to achieve multiple cleaning processes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a fully automatic silicone extruder according to the present invention; Figure 2 This is a partial structural diagram of the screw extrusion mechanism in a fully automatic silicone extruder according to the present invention; Figure 3 This is a schematic diagram of the negative pressure feeding assembly in a fully automatic silicone extruder according to the present invention; Figure 4 This is a schematic diagram showing the structure of the adjustment component in a fully automatic silicone extruder according to the present invention; Figure 5 This is a cross-sectional schematic diagram of the moving frame in a fully automatic silicone extruder according to the present invention; Figure 6 This is a schematic diagram showing the structure of the stepped plate in a fully automatic silicone extruder according to the present invention. Figure 7 This is a schematic diagram of the cleaning component in a fully automatic silicone extruder according to the present invention; Figure 8 This is a schematic diagram of the scraper structure in a fully automatic silicone extruder according to the present invention; Figure 9 This is a cross-sectional schematic diagram of the structure of the fixing block in a fully automatic silicone extruder according to the present invention; Figure 10 This is a schematic diagram showing the structure of a filter screen in a fully automatic silicone extruder according to the present invention; Figure 11 This is a schematic diagram of the internal negative pressure cover in a fully automatic silicone extruder according to the present invention; Figure 12 This is a cross-sectional schematic diagram of the feeding roller structure in a fully automatic silicone extruder according to the present invention.

[0022] In the picture: 1. Screw extrusion mechanism; 2. Extrusion die; 3. Power mechanism; 4. Control system; 5. Negative pressure feeding assembly; 501. Feeding roller; 502. First motor; 503. Negative pressure hole; 504. Bearing; 505. Inner negative pressure cover; 506. Negative pressure pipe; 507. First pressure regulating valve; 508. Connecting pipe; 509. Fixing sleeve; 510. Fixing block; 6. Cleaning assembly; 601. Outer negative pressure cover; 602. Multi-pipe fitting; 603. Arc-shaped pipe; 604. Flexible hose; 605. Second pressure regulating valve; 606. Suction pipe; 607. Snap ring; 608. Filter screen; 609. Silicone scraper; 610. Buckle; 611. Snap hole; 612. Mounting block; 7. Adjustment assembly; 701. Base frame; 702. Moving frame; 703. Limiting groove; 704. Adjustment shaft; 705. Second motor; 706. Rotating shaft; 707. Toggle block; 708. Limiting block; 709. Slide rail; 710. Slide groove; 711. Fixing strip; 712. Scraper. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-12 As shown, the present invention provides a technical solution: A fully automatic silicone extruder includes a screw extrusion mechanism 1, an extrusion die 2, a power mechanism 3, and a control system 4, and further includes: The negative pressure feeding assembly 5 is located at the feeding end of the screw extrusion mechanism 1. The negative pressure feeding assembly 5 is used for negative pressure feeding of the silicone strip rolling. Cleaning component 6 is located on the outer surface of negative pressure feeding component 5. Cleaning component 6 is used to clean residual material on the surface of the feeding roller. Adjustment component 7 is used to adjust the negative pressure contact area between the negative pressure feeding component 5 and the silicone strip; The negative pressure feeding assembly 5 includes a feeding roller 501 and a first motor 502. The outer surface of the feeding roller 501 is provided with a plurality of negative pressure holes 503. An inner negative pressure cover 505 is provided inside the feeding roller 501. A negative pressure pipe 506 is fixedly connected to one side of the outer surface of the inner negative pressure cover 505. One end of the negative pressure pipe 506 is connected to an air source through a pipe to form a negative pressure inside the inner negative pressure cover 505.

[0025] In practical applications, such as Figure 12As shown, a plurality of negative pressure holes 503 are distributed circumferentially on the outer surface of the feeding roller 501. An inner negative pressure cover 505 is embedded inside the feeding roller 501, and the inner negative pressure cover 505 is connected to an external air source through a negative pressure pipe 506. The inner negative pressure cover 505 faces the direction of silicone strip feeding. The outer negative pressure cover 601 and the filter screen 608 in the cleaning component 6 are fitted on the outer surface of the feeding roller 501. The outer negative pressure cover 601 and the inner negative pressure cover 505 face the same direction. The feeding roller 501 rotates counterclockwise to feed material, that is, the left side is the feeding area and the right side is the cleaning area, so that after the feeding roller 501 feeds material, it can rotate to the cleaning component 6 for cleaning. The first motor 502, the second motor 705, the first pressure regulating valve 507, and the second pressure regulating valve 605 are all electrically connected to the control system 4. The first motor 502 is preferably a Delta ECM-B3 series. The automatic silicone feeding mechanism is installed above the feed inlet of the screw extrusion mechanism 1. When the silicone feeding mechanism, the first motor 502, and the external air source are started, the silicone feeding mechanism automatically feeds the silicone strip downwards. The first motor 502 drives the feeding roller 501 to rotate counterclockwise on the outer surface of the inner negative pressure cover 505, dragging the silicone strip downwards and into the screw extrusion mechanism 1 through the feed inlet for silicone extrusion. At the same time, the external air source generates suction, which draws the gas in the inner negative pressure cover 505 through the pipe and the negative pressure pipe 506, so that a negative pressure chamber is formed inside the inner negative pressure cover 505. The uniformly distributed negative pressure holes 503 provide a stable negative pressure suction only to the feeding side of the feeding roller 501, thereby firmly adsorbing the silicone strip, making it adhere to the roller surface, and being forcibly dragged and fed as the roller surface rotates. Based on the negative pressure feeding component 5, the silicone strip is actively adsorbed to achieve negative pressure assisted material gripping, preventing slippage and deviation, and achieving the effect of active gripping and precise conveying. This solves the problem that slippage easily occurs between the feeding roller and the silicone in the production of medical-grade silicone tubes in fully automatic silicone extruders, resulting in unstable feeding, intermittent feeding or even material breakage, which in turn leads to poor quality of extruded tubes and failure to meet the precision requirements of medical-grade products.

[0026] It should also be noted that bearings 504 are provided at both ends of the feeding roller 501. The output end of the first motor 502 is fixedly connected to one end of the feeding roller 501. One end of the negative pressure pipe 506 is connected to the first pressure regulating valve 507 through a flange. One end of the first pressure regulating valve 507 is connected to the connecting pipe 508 through a flange. A fixing sleeve 509 is fixedly installed on the outer surface of the inner negative pressure cover 505, and one end of the fixing sleeve 509 extends movably through the outer surface of the feeding roller 501. A fixing block 510 is fixedly installed on one end of the fixing sleeve 509.

[0027] See Figure 3 and Figures 6 to 12As shown, a bearing 504 is installed between the feeding roller 501 and the moving frame 702 to facilitate stable rotation and feeding of the feeding roller 501 under the drive of the first motor 502. A connecting pipe 508 is used to connect to the suction pipe 606, achieving suction connection through this connection. The negative pressure pipe 506, the first pressure regulating valve 507, and the connecting pipe 508 are connected to facilitate suction inside the inner negative pressure cover 505, forming a negative pressure zone. The first pressure regulating valve 507 (preferably an SMCITV2030 series) can adjust the suction force of the inner negative pressure cover 505. The inner negative pressure cover 505 is fixed inside the feeding roller 501 by a fixing sleeve 509 to ensure its stability. The fixing sleeve 509 is fixed and supported by a fixing block 510 to improve its stability.

[0028] It should also be noted that the cleaning component 6 includes an outer negative pressure cover 601. Multiple multi-pipe fittings 602 are fixedly connected to the outer surface of the outer negative pressure cover 601. An arc-shaped pipe 603 is fixedly connected to the outer surface of the multiple multi-pipe fittings 602. One end of the arc-shaped pipe 603 is connected to a flexible hose 604 through a threaded fitting. One end of the flexible hose 604 is connected to a second pressure regulating valve 605 through an external connecting pipe. One end of the second pressure regulating valve 605 is fixedly connected to a suction pipe 606. One end of the connecting pipe 508 is fixedly connected to the suction pipe 606. One end of the suction pipe 606 is connected to a vacuum pump through a telescopic pipe.

[0029] See Figure 3 and Figures 6 to 12 As shown, the vacuum pump starts, generating suction. This suction, through the suction pipe 606, the second pressure regulating valve 605, the hose 604, the arc-shaped pipe 603, and multiple multi-pipe fittings 602, draws air from inside the outer negative pressure cover 601, creating a negative pressure chamber inside. After the feeding roller 501 feeds material under negative pressure, it continues to rotate into the outer negative pressure cover 601, i.e., into the external negative pressure zone. This generates suction on the outer surface of the feeding roller 501, adsorbing any residual silica gel adhering to the negative pressure holes 503, preventing blockage and cleaning the feeding roller 501. The negative pressure holes 503 remain unobstructed, facilitating subsequent stable negative pressure material handling and improving the negative pressure feeding effect. The second pressure regulating valve 605, preferably an Airtac EB2000 series, is used to adjust the suction force inside the outer negative pressure cover 601.

[0030] It should also be noted that the outer negative pressure cover 601 is equipped with a filter screen 608, and multiple silicone scrapers 609 are fixedly installed inside the filter screen 608. The outer surface of the silicone scrapers 609 is in contact with the outer surface of the feeding roller 501. Multiple buckles 610 are fixedly installed at the edge of the inner wall of the outer negative pressure cover 601, and multiple locking holes 611 are opened at the edge of the outer surface of the filter screen 608. Each buckle 610 is movably embedded in the locking hole 611.

[0031] See Figures 7 to 12 As shown, a filter screen 608 is installed between the outer negative pressure cover 601 and the feeding roller 501. When cleaning the silica gel in the negative pressure hole 503 with negative pressure, the silica gel adsorbed will fall into the filter screen 608, preventing silica gel particles from being accidentally sucked into the multi-pipe fitting 602 and affecting the smooth flow of the pipeline. At the same time, the silica gel scraper 609 scrapes the outer surface of the feeding roller 501, scraping off the silica gel that has not been completely cleaned from the roller surface again. It can also scrape off the silica gel particles adsorbed in the negative pressure hole 503 but still attached to the roller surface, improving the cleaning effect of the roller surface. The negative pressure feeding component 5 and the cleaning component 6 work together, with independent negative pressure zones inside and outside. One side realizes negative pressure feeding, and the other side realizes micropore self-cleaning. The two work together without interfering with each other, further improving the stability and continuity of feeding by the feeding roller.

[0032] The filter screen 608 is connected to the outer negative pressure cover 601 by a buckle 610 and a locking hole 611. After the outer negative pressure cover 601 is pushed away from the outer surface of the feeding roller 501, the filter screen 608 is pulled outward, so that the locking hole 611 is separated from the buckle 610. The filter screen 608 can then be removed, the collected silica gel material inside can be cleaned, and it can be reused.

[0033] It should also be noted that the adjustment assembly 7 includes a base frame 701 and a movable frame 702. Adjustment shafts 704 are fixedly installed at the bottom of the outer surfaces on both sides of the movable frame 702. A second motor 705 is fixedly installed at the top of the base frame 701. A rotating shaft 706 is fixedly installed at the output end of the second motor 705. Two toggle blocks 707 are fixedly installed on the outer surface of the rotating shaft 706. The outer surfaces of the two adjustment shafts 704 are respectively movably embedded inside the two toggle blocks 707.

[0034] See Figures 4 to 6 As shown, the second motor 705 preferably adopts the Leadshine 57CME series. When the second motor 705 is started, the rotating shaft 706 is driven to rotate, which drives the two toggle blocks 707 to rotate on the outer surface of the corresponding adjusting shaft 704. This, in turn, drives the two adjusting shafts 704 to move laterally in sync, thereby realizing the lateral movement of the moving frame 702. The negative pressure feeding component 5 and the cleaning component 6 move synchronously towards the silicone strip, so that the feeding roller 501 gets closer to the silicone strip, expands the contact arc length (i.e., contact area) between the roller surface and the silicone strip, improves the negative pressure adsorption effect on low-viscosity and hard silicone, and better feeds silicone of different hardness.

[0035] It should also be noted that two fixing strips 711 are fixedly installed on the rear surface of the bottom of the movable frame 702, and a scraper 712 is fixedly installed between the two fixing strips 711. The scraper 712 is in contact with the outer surface of the feeding roller 501. The extrusion die 2 is installed at the output end of the screw extrusion mechanism 1 through a connector, and the output end of the power mechanism 3 is connected to the input end of the screw extrusion mechanism 1.

[0036] See Figure 1 , Figures 4 to 5 , Figure 8 and Figure 12 As shown, after the feeding roller 501 feeds the material, it continues to rotate, first reaching the scraper 712. The scraper 712 scrapes off the silicone material adhering to the roller surface, performing an initial cleaning. The scraped silicone slides along the smooth surface of the scraper 712 into the screw extrusion mechanism 1. The roller surface then continues to rotate, undergoing a second cleaning by the cleaning component 6. The scraper 712 and the cleaning component 6 work together to achieve multiple cleaning processes. The screw extrusion mechanism 1 outputs silicone, which is extruded through the extrusion die 2 to form a tube, and then enters the subsequent high-temperature vulcanization system for vulcanization.

[0037] It should also be noted that a limiting block 708 is fixedly installed at the top edge of the base frame 701, one end of the rotating shaft 706 is movably embedded in the outer surface of the limiting block 708, and two slide rails 709 are movably embedded in the bottom of the movable frame 702. The bottom of the two slide rails 709 is installed on the top of the base frame 701 by a reinforcing rod.

[0038] See Figures 4 to 5 As shown, the rotating shaft 706 is supported by the limiting block 708, which facilitates the smooth rotation of the rotating shaft 706. The movable frame 702 is limited and supported by the slide rail 709, which facilitates the smooth sliding of the movable frame 702 under the drive of the lever block 707.

[0039] It should also be noted that the outer surface of the fixing block 510 is fixedly installed on one side of the outer surface of the movable frame 702, the outer surfaces of the negative pressure pipe 506 and the connecting pipe 508 are both fixedly installed with auxiliary blocks, and the auxiliary blocks are fixedly installed on one side of the outer surface of the movable frame 702. The first motor 502 is installed on the other side of the outer surface of the movable frame 702 through the auxiliary plate, and the outer surfaces of the two bearings 504 are both fixedly installed inside the movable frame 702.

[0040] See Figures 5 to 7 and Figure 9 As shown, the negative pressure pipe 506 and the connecting pipe 508 are supported by the auxiliary block to improve the stability of the pipe fittings. The first motor 502 is installed on the outer surface of the moving frame 702 through the auxiliary plate, so that when the moving frame 702 moves, it can drive the first motor 502 to move together without affecting the normal operation of the negative pressure feeding assembly 5.

[0041] It should also be noted that a limiting groove 703 is provided at the center of the top of the mobile frame 702, a retaining ring 607 is fixedly installed on the outer surface of the hose 604, and the retaining ring 607 is movably embedded in the limiting groove 703. The outer surface of the suction pipe 606 is installed at the edge of the bottom surface inside the mobile frame 702 through an auxiliary frame. Mounting blocks 612 are fixedly installed on both outer surfaces of the outer negative pressure cover 601. Two sliding grooves 710 are provided at the top of the mobile frame 702, and the outer surfaces of the two mounting blocks 612 are movably embedded in the two sliding grooves 710 respectively. The mounting blocks 612 are connected to the mobile frame 702 by hand-tightened bolts.

[0042] See Figures 3-9 As shown, the retaining ring 607 is movably embedded in the limiting groove 703. Through the cooperation between the retaining ring 607 and the limiting groove 703, the hose 604 is supported, reducing wear between the hose 604 and the groove wall. By turning the threaded connector between the arc-shaped tube 603 and the hose 604, the arc-shaped tube 603 and the hose 604 can be separated. By unscrewing the hand-tightening bolt, the limiting position between the mounting block 612 and the moving frame 702 is removed, allowing the outer negative pressure cover 601 to slide. At the same time, the mounting block 612 slides inside the sliding groove 710. After the outer negative pressure cover 601 leaves the outer surface of the feeding roller 501, pull the outer negative pressure cover 601 upward and pull the mounting block 612 out of the sliding groove 710. The outer negative pressure cover 601 can then be removed separately from the moving frame 702, facilitating the subsequent disassembly of the filter screen 608.

[0043] Please see Figures 1-12As shown, the overall effect and working principle of the mechanism are as follows: The vacuum pump starts, generating suction. Through the suction pipe 606, the second pressure regulating valve 605, the hose 604, the arc-shaped pipe 603, and multiple multi-pipe fittings 602, air is drawn from inside the outer negative pressure cover 601, creating a negative pressure chamber inside the outer negative pressure cover 601. Simultaneously, the negative pressure pipe 506, the first pressure regulating valve 507, and the connecting pipe 508 work together to draw air from inside the inner negative pressure cover 505, forming an internal negative pressure chamber. The silicone feeding mechanism feeds silicone strips downwards. The first motor 502 drives the feeding roller 501 to rotate counterclockwise, dragging the silicone strip downwards while firmly adhering to it, making it adhere to the roller surface. As the roller surface rotates, the strip is forcibly dragged and fed, entering the screw extrusion mechanism 1 through the feed inlet for conveying and extruding silicone. The extrusion die 2 then extrudes the strip into a tube, which then enters the subsequent high-temperature vulcanization system for vulcanization. The feeding roller 501 continues to rotate, reaching the scraper 712. The scraper 712 scrapes off the silicone material adhering to the roller surface, performing an initial cleaning. It then rotates to the external negative pressure zone, generating suction on the outer surface of the feeding roller 501. This suction draws out any remaining silicone material adhering to the negative pressure holes 503. The adsorbed silicone falls into the filter screen 608, preventing silicone particles from being accidentally sucked into the multi-pipe fitting 602 and affecting pipe flow. Simultaneously, the silicone scraper 609 scrapes the outer surface of the feeding roller 501, further removing any remaining silicone material that was not completely cleaned. It also removes any silicone particles adsorbed from the negative pressure holes 503 but still adhering to the roller surface. After cleaning, the feeding roller 501 continues to rotate, returning to the feeding zone for continued negative pressure feeding.

[0044] Among them, the screw extrusion mechanism 1, power mechanism 3, control system 4, first motor 502, first pressure regulating valve 507, second pressure regulating valve 605 and second motor 705 are all existing technologies, and their components and operating principles are all publicly available technologies, which will not be explained in detail here.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automatic silicone extruder, comprising a screw extrusion mechanism (1), an extrusion die (2), a power mechanism (3), and a control system (4), characterized in that: Also includes: The negative pressure feeding assembly (5) is located at the feeding end of the screw extrusion mechanism (1). The negative pressure feeding assembly (5) is used for rolling negative pressure feeding of silicone strips. The cleaning component (6) is located on the outer surface of the negative pressure feeding component (5), and the cleaning component (6) is used to clean the residual material on the surface of the feeding roller; Adjustment component (7) is used to adjust the negative pressure contact area between the negative pressure feeding component (5) and the silicone strip; The negative pressure feeding assembly (5) includes a feeding roller (501) and a first motor (502). The outer surface of the feeding roller (501) is provided with a plurality of negative pressure holes (503). An inner negative pressure cover (505) is provided inside the feeding roller (501). A negative pressure pipe (506) is fixedly connected to one side of the outer surface of the inner negative pressure cover (505). One end of the negative pressure pipe (506) is connected to an air source through a pipe to form negative pressure inside the inner negative pressure cover (505).

2. The fully automatic silicone extruder according to claim 1, characterized in that: Bearings (504) are provided at both ends of the feeding roller (501). The output end of the first motor (502) is fixedly connected to one end of the feeding roller (501). One end of the negative pressure pipe (506) is connected to a first pressure regulating valve (507) through a flange. One end of the first pressure regulating valve (507) is connected to a connecting pipe (508) through a flange. A fixing sleeve (509) is fixedly installed on the outer surface of the inner negative pressure cover (505), and one end of the fixing sleeve (509) extends movably through the outer surface of the feeding roller (501). A fixing block (510) is fixedly installed on one end of the fixing sleeve (509).

3. The fully automatic silicone extruder according to claim 2, characterized in that: The cleaning component (6) includes an outer negative pressure cover (601), with multiple multi-pipe fittings (602) fixedly connected to the outer surface of the outer negative pressure cover (601), and an arc-shaped pipe (603) fixedly connected to the outer surface of the multiple multi-pipe fittings (602). One end of the arc-shaped pipe (603) is connected to a flexible hose (604) via a threaded fitting, and one end of the flexible hose (604) is connected to a second pressure regulating valve (605) via an external connecting pipe. One end of the second pressure regulating valve (605) is fixedly connected to a suction pipe (606), and one end of the connecting pipe (508) is fixedly connected to the suction pipe (606). One end of the suction pipe (606) is connected to a vacuum pump via a telescopic pipe.

4. The fully automatic silicone extruder according to claim 3, characterized in that: The outer negative pressure cover (601) is provided with a filter screen (608), and a plurality of silicone scrapers (609) are fixedly installed inside the filter screen (608). The outer surface of the silicone scraper (609) is in contact with the outer surface of the feeding roller (501). A plurality of buckles (610) are fixedly installed at the edge of the inner wall of the outer negative pressure cover (601). A plurality of locking holes (611) are opened at the edge of the outer surface of the filter screen (608). Each buckle (610) is movably embedded in the locking hole (611).

5. The fully automatic silicone extruder according to claim 4, characterized in that: The adjustment assembly (7) includes a base frame (701) and a movable frame (702). Adjustment shafts (704) are fixedly installed at the bottom of the outer surfaces on both sides of the movable frame (702). A second motor (705) is fixedly installed on the top of the base frame (701). A rotating shaft (706) is fixedly installed at the output end of the second motor (705).

6. The fully automatic silicone extruder according to claim 5, characterized in that: Two levers (707) are fixedly installed on the outer surface of the rotating shaft (706). The outer surfaces of the two adjusting shafts (704) are respectively movably embedded in the two levers (707). The extrusion die (2) is installed at the output end of the screw extrusion mechanism (1) through a connector. The output end of the power mechanism (3) is connected to the input end of the screw extrusion mechanism (1).

7. The fully automatic silicone extruder according to claim 6, characterized in that: Two fixing strips (711) are fixedly installed on the rear surface of the bottom of the movable frame (702), and a scraper (712) is fixedly installed between the two fixing strips (711), and the scraper (712) is in contact with the outer surface of the feeding roller (501).

8. The fully automatic silicone extruder according to claim 7, characterized in that: A limiting block (708) is fixedly installed at the top edge of the base frame (701). One end of the rotating shaft (706) is movably embedded in the outer surface of the limiting block (708). Two slide rails (709) are movably embedded in the bottom of the movable frame (702). The bottom of the two slide rails (709) is installed on the top of the base frame (701) by a reinforcing rod.

9. The fully automatic silicone extruder according to claim 8, characterized in that: The outer surface of the fixing block (510) is fixedly installed on one side of the outer surface of the movable frame (702). The outer surfaces of the negative pressure pipe (506) and the connecting pipe (508) are both fixedly installed with auxiliary blocks, and the auxiliary blocks are fixedly installed on one side of the outer surface of the movable frame (702). The first motor (502) is installed on the other side of the outer surface of the movable frame (702) through the auxiliary plate. The outer surfaces of the two bearings (504) are both fixedly installed inside the movable frame (702).

10. The fully automatic silicone extruder according to claim 9, characterized in that: A limiting groove (703) is provided at the center of the top of the mobile frame (702). A retaining ring (607) is fixedly installed on the outer surface of the hose (604). The retaining ring (607) is movably embedded in the limiting groove (703). The outer surface of the suction pipe (606) is installed at the edge of the bottom surface inside the mobile frame (702) through an auxiliary frame. Mounting blocks (612) are fixedly installed on both outer surfaces of the outer negative pressure cover (601). Two sliding grooves (710) are provided at the top of the mobile frame (702). The outer surfaces of the two mounting blocks (612) are movably embedded in the two sliding grooves (710) respectively. The mounting blocks (612) are connected to the mobile frame (702) by hand-tightening bolts.

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