Blanking structure for manufacturing non-asphaltic sand surface waterproof coiled material

By designing a cooling mechanism in the non-asphalt sand surface waterproof roll manufacturing device, and using the refrigeration sheet and air duct system to cool down, the problem of indoor temperature rise caused by high material temperature in the hopper is solved, and an effective cooling effect is achieved.

CN222573157UActive Publication Date: 2025-03-07CHONGQING DAYU WATERPROOF TECH DEV CO LTD
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Patent Information

Application Number
CN202421234220.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-02
Publication Date
2025-03-07
Estimated Expiration
2034-06-02

AI Technical Summary

Technical Problem

In the prior art, the material temperature in the hopper of the non-asphalt sand surface waterproof coil manufacturing device is relatively high, and the heat dissipation fan can only blow away the hot air and cannot effectively cool down, resulting in an increase in the indoor temperature.

Method used

A blanking structure including a hopper, a base and a cooling mechanism is designed. The cooling mechanism includes a plurality of refrigeration sheets, an air collecting hood, an air guide duct and a collection box. The hot air absorbed by the heat dissipation fan is introduced into the collection box through the air collecting hood and the air guide duct, and then cooled and discharged through the refrigeration sheet.

Benefits of technology

It effectively avoids the problem of a sharp rise in indoor temperature, improves the cooling effect, and ensures a comfortable environment for the equipment when used indoors.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of non-asphaltic sand surface waterproof coiled material manufacturing, in particular to a blanking structure for non-asphaltic sand surface waterproof coiled material manufacturing, which comprises a hopper, a base and a cooling mechanism, an electric telescopic rod is arranged at one end of the base, and a movable rod is arranged at the output end of the electric telescopic rod. A cooling fan and a stepping motor are arranged at one end of the movable rod, an auger is arranged at the output end of the stepping motor, a material blocking mechanism is arranged below the base, the cooling mechanism comprises a plurality of refrigeration pieces, an air collecting cover, an air guiding pipe and a collecting box, a partition plate is arranged in the collecting box, and a plurality of corrugated plastic pipes are arranged on the end face of the partition plate; a plurality of C-shaped blocks are arranged on the inner wall of the collecting box, hot air absorbed by a cooling fan is sucked into the collecting box through an air collecting cover and an air guide pipe, then the hot air passing through a plurality of corrugated plastic pipes is cooled through a plurality of refrigeration pieces, and then the hot air is discharged, so that the situation that the indoor temperature is greatly increased is avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing non-asphalt sand surface waterproof coiled materials, in particular to a blanking structure for manufacturing non-asphalt sand surface waterproof coiled materials. Background Art

[0002] Non-asphalt sand-surface waterproofing membrane is a polymer material used for building waterproofing. It does not contain traditional asphalt components and has the characteristics of self-adhesive film. It is mainly used for building walls, roofs, tunnels, roads, landfills, etc., to resist external rainwater and groundwater leakage. It is a flexible building material product that can be rolled into a roll. Compared with ordinary membranes, sand-surface waterproofing membranes have longer service life and better waterproofing effect. When producing sand-surface waterproofing membranes, the material is first put into the hopper, and the sand is heavier and will sink in the hopper, resulting in uneven distribution of the sand surface, affecting the waterproofing effect and service life. The method of dropping the material through the swinging baffle will also cause the material to flow on the baffle, and the dropping speed is slow, affecting the normal manufacturing process.

[0003] The prior art patent CN209442022U discloses a material dropping structure of a non-asphalt sand surface waterproofing membrane manufacturing device, comprising a base, a hopper is vertically provided on the upper side wall of the base, and the hopper passes through the base, the upper side wall of the base is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a transverse movable rod, the lower side wall of the movable rod is fixedly connected with a stepping motor, the output shaft of the stepping motor is fixedly connected with a screw, and the screw passes through the hopper, the lower side wall of the base is fixedly connected with a servo motor, the output shaft of the servo motor is fixedly connected with a turntable, the side wall of the turntable away from the center of the circle is rotatably connected with a swing rod, and the end of the swing rod away from the turntable is rotatably connected with a transversely arranged baffle; the prior art utilizes the electric telescopic rod to compress the screw to penetrate into the hopper and transport the material at the bottom to the upper part by counterclockwise rotation, and the baffle is driven to move horizontally by the turntable so that the material can fall quickly.

[0004] However, in the above-mentioned prior art, since the material in the hopper has a certain temperature, when the device is used indoors, the heat dissipation fan can only blow away the hot air and cannot play a role in cooling, thereby causing the indoor temperature to rise significantly. Utility Model Content

[0005] The purpose of the utility model is to provide a blanking structure for manufacturing non-asphalt sand surface waterproofing membranes, aiming to solve the technical problem in the prior art that since the material in the hopper has a certain temperature, when the device is used indoors, the heat dissipation fan can only blow away the hot air and cannot play a cooling role, thereby causing the indoor temperature to rise significantly.

[0006] To achieve the above-mentioned purpose, the utility model adopts a blanking structure for manufacturing non-asphalt sand surface waterproofing membrane, including a hopper, a base and a cooling mechanism, one end of the base is provided with an electric telescopic rod, the output end of the electric telescopic rod is provided with a movable rod, one end of the movable rod is provided with a cooling fan and a stepper motor, the output end of the stepper motor is provided with a dragon, a material blocking mechanism is provided below the base, the hopper is fixedly connected to the base and is located at the other end of the base, and the dragon is located in the hopper, the material blocking mechanism and the hopper are mutually supported and are located at the discharge port of the hopper, and the cooling mechanism includes a plurality of refrigeration plates, an air collecting hood, An air duct and a collection box, wherein a partition is provided in the collection box, and a plurality of corrugated plastic tubes are provided on the end face of the partition, and a plurality of C-shaped blocks are provided on the inner wall of the collection box, and a plurality of refrigeration fins are respectively slidably connected with the corresponding two C-shaped blocks and are located between the two C-shaped blocks and also between the plurality of corrugated plastic tubes, the air collecting hood is connected with the heat dissipation fan and is located at the air outlet of the heat dissipation fan, the air duct is connected with the air collecting hood and is located at the air outlet of the air collecting hood, the air duct is also connected with the collection box and is located at the air inlet of the collection box, and the collection box is fixedly connected with the movable rod and is located above the movable rod.

[0007] Among them, the cooling mechanism also includes a filter screen, a handle is provided at one end of the filter screen, the outer side of the collection box has a through hole, the inner wall of the through hole is provided with a sealing ring, the filter screen is plugged into the collection box and is located in the through hole, and is also located between the partition and the air duct.

[0008] Wherein, the cooling mechanism further comprises a sealing plate, which is fixedly connected to the collecting box by bolts and is located at the other end of the collecting box, and a plurality of the corrugated plastic tubes penetrate the sealing plate.

[0009] Among them, the blanking structure for manufacturing non-asphalt sand surface waterproof membrane also includes two material cover mechanisms, the two material cover mechanisms are respectively hinged to the hopper and symmetrically arranged on both sides of the hopper, and the dragon is located between the two material cover mechanisms.

[0010] Among them, the material cover mechanism includes a material cover body and a hydraulic telescopic rod, the material cover body is hinged to the hopper and is located on one side of the hopper, the hydraulic telescopic rod is fixedly connected to the hopper and is located on one side of the hopper, and the output end of the hydraulic telescopic rod is arranged at the end of the material cover body away from the dragon.

[0011] Among them, the material baffle mechanism includes a servo motor and a baffle, a turntable is provided at the output end of the servo motor, a swing rod is provided on the turntable, a scraper is provided at one end of the baffle, a T-shaped block is provided above the baffle, and the inner bottom of the base has a T-shaped groove, the servo motor is fixedly connected to the base and is located below the base, the T-shaped block is slidably connected to the base and is located in the T-shaped groove, the swing rod is hinged to the baffle and is located at the other end of the baffle, and the baffle and the hopper are abutted against each other and are located at the discharge port of the hopper.

[0012] The utility model discloses a material blanking structure for manufacturing non-asphalt sand surface waterproofing coiled materials, comprising a hopper, a base and a cooling mechanism, one end of the base is provided with an electric telescopic rod, the output end of the electric telescopic rod is provided with a movable rod, one end of the movable rod is provided with a heat dissipation fan and a stepping motor, the output end of the stepping motor is provided with a dragon, a material blocking mechanism is provided below the base, the cooling mechanism comprises a plurality of refrigeration sheets, an air collecting hood, an air guide duct and a collection box, a partition is provided in the collection box, the end face of the partition is provided with a plurality of corrugated plastic tubes, and the inner wall of the collection box is provided with a plurality of A C-shaped block is provided, and the hot air absorbed by the cooling fan is sucked into the collecting box through the wind collecting hood and the air duct, and then the hot air passing through the multiple corrugated plastic tubes is cooled by the multiple refrigeration plates and then discharged, thereby avoiding the situation where the indoor temperature will rise sharply. The corrugated plastic tube used in this design is made of polybutylene, which has high temperature resistance, durability and chemical stability, and the corrugated plastic tube can be bent into a plurality of U-shaped tubes, thereby ensuring that the hot air can stay in the corrugated plastic tube for a longer time, thereby improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a side view of the first embodiment of the utility model.

[0015] Figure 2 The utility model Figure 1 Section view along line AA.

[0016] Figure 3 The utility model Figure 2 Sectional view along line BB.

[0017] Figure 4 The utility model Figure 3 A partial enlarged view of point C in the middle.

[0018] Figure 5 The utility model Figure 2 Sectional view along line DD.

[0019] Figure 6 The utility model Figure 5 A partial enlarged view of point E in the middle.

[0020] Figure 7 It is a three-dimensional stereogram of the second embodiment of the utility model.

[0021] Figure 8 It is a front view of the second embodiment of the utility model.

[0022] Fig. 9 The utility model Figure 8 Cross-sectional view along line FF.

[0023] 101-hopper, 102-base, 103-electric telescopic rod, 104-movable rod, 105-cooling fan, 106-stepping motor, 107-dragon, 108-material blocking mechanism, 109-refrigeration plate, 110-wind collecting hood, 111-air guide pipe, 112-collection box, 113-partition, 114-corrugated plastic pipe, 115-C-shaped block, 116-filter, 117-handle, 118-through hole, 119-sealing plate, 201-material cover body, 202-hydraulic telescopic rod, 203-servo motor, 204-baffle, 205-turntable, 206-swing rod, 207-scraper, 208-T-shaped block, 209-T-shaped slot. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] First embodiment:

[0026] See also Figure 1 to Figure 6 ,in Figure 1 is a side view of the first embodiment of the utility model, Figure 2 The utility model Figure 1 The cross-sectional view along the AA line. Figure 3 The utility model Figure 2 The cross-sectional view of the BB line. Figure 4 The utility model Figure 3A partial enlarged view of point C in the middle. Figure 5 The utility model Figure 2 The cross-sectional view of the DD line, Figure 6 The utility model Figure 5 A partial enlarged view of point E in the middle.

[0027] The utility model provides a blanking structure for manufacturing non-asphalt sand surface waterproofing membranes, including a hopper 101, a base 102 and a cooling mechanism, wherein the cooling mechanism includes a plurality of cooling fins 109, an air collecting hood 110, an air guide duct 111, a collecting box 112, a filter screen 116 and a sealing plate 119. The above-mentioned scheme solves the technical problem that since the material in the hopper 101 has a certain temperature, when the device is used indoors, the heat dissipation fan 105 can only blow away the hot air and cannot play a role in cooling, thereby causing the indoor temperature to rise significantly.

[0028] According to the present specific embodiment, an electric telescopic rod 103 is provided at one end of the base 102, a movable rod 104 is provided at the output end of the electric telescopic rod 103, a cooling fan 105 and a stepping motor 106 are provided at one end of the movable rod 104, a dragon 107 is provided at the output end of the stepping motor 106, a material blocking mechanism 108 is provided below the base 102, the hopper 101 is fixedly connected to the base 102 and is located at the other end of the base 102, and the dragon 107 is located in the hopper 101, the material blocking mechanism 108 and the hopper 101 are mutually supported and located at the material At the discharge port of the hopper 101, the stepper motor 106 rotates counterclockwise, and the dragon 107 rotates along with the stepper motor 106 to transport the material at the bottom of the hopper 101 to the upper part, thereby avoiding the accumulation of sand at the bottom and ensuring the uniformity of the sand laying. When dropping the material, the stepper motor 106 rotates clockwise to squeeze the material downward to avoid the material falling slowly due to its high viscosity. Then, the material blocking mechanism 108 is moved horizontally, so that the material can fall quickly and evenly from the hopper 101, and the material blocking mechanism 108 will not block the process of dropping the material. The structure is simple and the operation is convenient.

[0029] Among them, a partition 113 is provided in the collection box 112, and a plurality of corrugated plastic tubes 114 are provided on the end surface of the partition 113. A plurality of C-shaped blocks 115 are provided on the inner wall of the collection box 112. The plurality of refrigeration fins 109 are respectively slidably connected with the corresponding two C-shaped blocks 115, and are located between the two C-shaped blocks 115, and are also located between the plurality of corrugated plastic tubes 114. The wind collecting hood 110 is connected with the cooling fan 105 and is located at the air outlet of the cooling fan 105. The air guide duct 111 is connected with the wind collecting hood 110 and is located at the air outlet of the wind collecting hood 110. The air guide duct 111 is also connected with the collection box 112 and is located at the air inlet of the collection box 112. The collection box 112 is fixedly connected with the movable rod 104 , and is located above the movable rod 104, and the hot air absorbed by the cooling fan 105 is sucked into the collecting box 112 through the wind collecting cover 110 and the air duct 111, and then the hot air passing through the multiple corrugated plastic tubes 114 is cooled by the multiple refrigeration fins 109, and then discharged, thereby avoiding the situation where the indoor temperature will rise sharply. The corrugated plastic tube 114 used in this design is made of polybutylene, which has high temperature resistance, durability and chemical stability, and the corrugated plastic tube 114 can be bent into a plurality of U-shaped tubes, thereby ensuring that the hot air can stay in the corrugated plastic tube 114 for a long time, thereby improving the cooling effect, and the refrigeration fin 109 can be a semiconductor cooling fin, a heat pipe cooling fin or a compressor cooling fin 109.

[0030] Secondly, a handle 117 is provided at one end of the filter 116, a through hole 118 is provided on the outer side of the collection box 112, a sealing ring is provided on the inner wall of the through hole 118, the filter 116 is plugged into the collection box 112, and is located in the through hole 118, and is also located between the partition 113 and the air duct 111. The filter 116 can be used to filter impurities in the hot air, thereby ensuring that the discharged gas will not pollute the surrounding environment.

[0031] Again, the sealing plate 119 is fixedly connected to the collecting box 112 by bolts and is located at the other end of the collecting box 112, and multiple corrugated plastic tubes 114 penetrate the sealing plate 119. The sealing plate 119 can be used to facilitate replacement of the refrigeration plate 109, thereby ensuring the refrigeration effect.

[0032] When the utility model is used to cool down the hot air, the hot air absorbed by the heat dissipation fan 105 is sucked into the collecting box 112 through the wind collecting hood 110 and the air duct 111, and then the hot air passing through the multiple corrugated plastic tubes 114 is cooled by the multiple refrigeration plates 109 and then discharged, thereby avoiding the situation where the indoor temperature will rise sharply. The corrugated plastic tube 114 used in this design is made of polybutene, which has high temperature resistance, durability and chemical stability, and the corrugated plastic tube 114 can be bent into a plurality of U-shaped tubes, thereby ensuring that the hot air can stay in the corrugated plastic tube 114 for a long time, thereby improving the cooling effect. In this way, the technical problem that the material in the hopper 101 has a certain temperature and when the device is used indoors, the heat dissipation fan 105 can only blow away the hot air and cannot play a cooling role, thereby causing the indoor temperature to rise sharply is solved.

[0033] The second embodiment is:

[0034] Based on the first embodiment, please refer to Figure 7 to Figure 9 ,in Figure 7 It is a three-dimensional stereogram of the second embodiment of the utility model. Figure 8 It is a front view of the second embodiment of the utility model. Fig. 9 The utility model Figure 8 Cross-sectional view along line FF.

[0035] The utility model provides a blanking structure for manufacturing non-asphalt sand surface waterproofing coiled materials, which also includes two material cover mechanisms. The material cover mechanism includes a material cover body 201 and a hydraulic telescopic rod 202 , and the material blocking mechanism 108 includes a servo motor 203 and a baffle 204 .

[0036] According to this specific embodiment, the two material cover mechanisms are respectively hinged to the hopper 101 and symmetrically arranged on both sides of the hopper 101, and the dragon 107 is located between the two material cover mechanisms. The arrangement of the material cover mechanisms can facilitate shielding the top of the hopper 101 to prevent the entry of impurities.

[0037] Among them, the material cover body 201 is hinged to the hopper 101 and is located on one side of the hopper 101, the hydraulic telescopic rod 202 is fixedly connected to the hopper 101 and is located on one side of the hopper 101, and the output end of the hydraulic telescopic rod 202 is arranged at the end of the material cover body 201 away from the dragon 107, and the material cover body 201 is opened and closed by the extension and contraction of the hydraulic telescopic rod 202, so as to facilitate the addition of materials and prevent impurities from entering from the upper opening of the hopper 101, thereby ensuring the smooth progress of the manufacturing process, and the side walls of the two material covers away from the hydraulic telescopic rod 202 are provided with semicircular grooves, the radius of the semicircular grooves is greater than the radius of the dragon 107, and when the two material cover bodies 201 are fully closed, the dragon 107 is located between the two semicircular grooves and does not contact the material cover body 201, thereby avoiding friction damage between the dragon 107 and the material cover body 201.

[0038] Secondly, a turntable 205 is provided at the output end of the servo motor 203, a swing rod 206 is provided on the turntable 205, a scraper 207 is provided at one end of the baffle 204, a T-shaped block 208 is provided above the baffle 204, and the inner bottom of the base 102 has a T-shaped slot 209. The servo motor 203 is fixedly connected to the base 102 and is located below the base 102. The T-shaped block 208 is slidably connected to the base 102 and is located in the T-shaped slot 209. The swing rod 206 is hinged to the baffle 204 and is located at the other end of the baffle 204, and the baffle 204 and the hopper 101 are mutually supported. It is located at the discharge port of the hopper 101. When the material is dropped, the stepper motor 106 rotates clockwise to squeeze the material downward to prevent the material from falling slowly due to its high viscosity. Then the servo motor 203 is turned on, and the servo motor 203 drives the turntable 205 to rotate, and the turntable 205 drives the swing rod 206 to rotate, and the swing rod 206 drives the baffle 204 to move. Under the restriction of the T-block 208 and the T-slot 209, the baffle 204 is moved horizontally, so that the material can quickly and evenly fall from the hopper 101, and the baffle 204 will not block the process of dropping the material. The structure is simple and the operation is convenient.

[0039] The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane of the present embodiment is used. The expansion and contraction of the hydraulic telescopic rod 202 drives the opening and closing of the material cover body 201, thereby facilitating the addition of materials and preventing impurities from entering from the upper opening of the hopper 101, thereby ensuring the smooth progress of the manufacturing process. The side walls of the two material covers away from the hydraulic telescopic rod 202 are provided with semicircular grooves, and the radius of the semicircular grooves is greater than the radius of the dragon 107. When the two material cover bodies 201 are fully closed, the dragon 107 is located between the two semicircular grooves and does not contact the material cover body 201, thereby preventing the dragon 107 from contacting the material cover body 201. 1 Friction damage, when dropping materials, the stepper motor 106 rotates clockwise to squeeze the materials downward to prevent the materials from falling slowly due to high viscosity, and then the servo motor 203 is turned on, the servo motor 203 drives the turntable 205 to rotate, the turntable 205 drives the swing rod 206 to rotate, and the swing rod 206 drives the baffle 204 to move. Under the restriction of the T-block 208 and the T-slot 209, the baffle 204 is moved horizontally, so that the materials can fall quickly and evenly from the hopper 101, and the baffle 204 will not block the process of dropping materials, with a simple structure and convenient operation.

[0040] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A material-dropping structure for manufacturing non-asphalt sand surface waterproofing membranes, comprising a hopper and a base, one end of the base is provided with an electric telescopic rod, the output end of the electric telescopic rod is provided with a movable rod, one end of the movable rod is provided with a cooling fan and a stepper motor, the output end of the stepper motor is provided with a dragon, a material-blocking mechanism is provided below the base, the hopper is fixedly connected to the base and is located at the other end of the base, and the dragon is located in the hopper, the material-blocking mechanism and the hopper are mutually supported and are located at the discharge port of the hopper, characterized in that: It also includes a cooling mechanism; The cooling mechanism includes a plurality of refrigeration fins, an air collecting hood, an air duct and a collection box. A partition is provided in the collection box, and a plurality of corrugated plastic tubes are provided on the end face of the partition. A plurality of C-shaped blocks are provided on the inner wall of the collection box. The plurality of refrigeration fins are respectively slidably connected with the corresponding two C-shaped blocks and are located between the two C-shaped blocks and also between the plurality of corrugated plastic tubes. The air collecting hood is connected with the heat dissipation fan and is located at the air outlet of the heat dissipation fan. The air duct is connected with the air collecting hood and is located at the air outlet of the air collecting hood. The air duct is also connected with the collection box and is located at the air inlet of the collection box. The collection box is fixedly connected with the movable rod and is located above the movable rod.

2. The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane according to claim 1, characterized in that: The cooling mechanism also includes a filter screen, one end of which is provided with a handle, the outer side of the collection box has a through hole, the inner wall of the through hole is provided with a sealing ring, the filter screen is plugged into the collection box and is located in the through hole, and is also located between the partition and the air duct.

3. The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane according to claim 2, characterized in that: The cooling mechanism further comprises a sealing plate, which is fixedly connected to the collecting box by bolts and is located at the other end of the collecting box, and a plurality of the corrugated plastic tubes penetrate the sealing plate.

4. The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane according to claim 3, characterized in that: The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane also includes two material cover mechanisms, which are respectively hinged to the hopper and symmetrically arranged on both sides of the hopper, and the dragon is located between the two material cover mechanisms.

5. The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane according to claim 4, characterized in that: The material cover mechanism includes a material cover body and a hydraulic telescopic rod. The material cover body is hinged to the hopper and is located on one side of the hopper. The hydraulic telescopic rod is fixedly connected to the hopper and is located on one side of the hopper. The output end of the hydraulic telescopic rod is arranged at the end of the material cover body away from the dragon.

6. The blanking structure for manufacturing non-asphalt sand surface waterproofing membrane according to claim 5, characterized in that: The material baffle mechanism includes a servo motor and a baffle, a turntable is provided at the output end of the servo motor, a swing rod is provided on the turntable, a scraper is provided at one end of the baffle, a T-block is provided above the baffle, and the inner bottom of the base has a T-slot, the servo motor is fixedly connected to the base and is located below the base, the T-block is slidably connected to the base and is located in the T-slot, the swing rod is hinged to the baffle and is located at the other end of the baffle, and the baffle and the hopper are abutted against each other and are located at the discharge port of the hopper.

Citation Information

Patent Citations

  • Blanking structure of non-asphaltic sand surface waterproof coiled material manufacturing device

    CN209442022U