Composite expansion joint sealing strip and its processing method

Abstract

The application provides a composite expansion joint sealing waterstop and a processing method thereof, which comprises a waterstop body, the inside of the waterstop body is provided with a glass fiber net, and the side of the waterstop body is provided with one or more groups of connecting structures; the connecting structure comprises a connecting head and a limiting head; the waterstop body comprises the following weight components: 85-95 parts of plastic, 2-5 parts of antioxidant, 2-5 parts of ultraviolet absorber, 5-10 parts of thermoplastic polyamide elastomer, 7-15 parts of flame retardant, 3-6 parts of calcium carbonate powder and 2-5 parts of metal soap; the bottom end of the connecting structure is a triangular structure, the triangular structure makes the waterstop more easily inserted into the expansion joint, and the inserted waterstop is not easy to be pulled up in cooperation with the limiting head; the inside is additionally provided with the glass fiber net, the strength and hardness of the whole waterstop are increased, and in addition, the winding of the whole waterstop can be driven by the glass fiber net when the waterstop is processed for the first time, so that the waterstop can be effectively prevented from being broken.

Description

Technical Field

[0001] This invention relates to the field of waterstop processing technology, specifically to a composite expansion joint sealing waterstop and its processing method. Background Technology

[0002] Back-adhesive waterstops are a type of water-stopping structure installed on the outer (water-facing) side of the concrete expansion joints and settlement joints of underground structures. They have the ability to adapt to the expansion and contraction of concrete through the material elasticity and structural form of the waterstop; plastic back-adhesive waterstops are one type.

[0003] Existing plastic back-adhesive waterstops are made of plastic and have a plate-like body with a vertical connector at the bottom. When used, this type of plastic back-adhesive waterstop is inserted into the expansion joint or deformation joint through the connector. On the one hand, the connection between the vertical connector and the expansion joint is not tight enough, and the waterstop is prone to popping out over time. On the other hand, the waterstop itself will also age and deteriorate over time, resulting in a short service life. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a composite expansion joint sealing and waterstop strip and its processing method, which can solve the existing problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention is achieved through the following technical solution: a composite expansion joint sealing and water-stopping strip.

[0007] The device includes a waterstop body, the interior of which is provided with a fiberglass mesh, and the side of the waterstop body is provided with one or more sets of connecting structures; the connecting structure includes a connector and a limiting head, and the free end of the connector is connected to the limiting head with an arc-shaped structure on both sides; the free end of the connector has a triangular structure.

[0008] The waterstop body comprises the following components by weight: 85-95 parts plastic, 2-5 parts antioxidant, 2-5 parts ultraviolet absorber, 5-10 parts thermoplastic polyamide elastomer, 7-15 parts flame retardant, 3-6 parts calcium carbonate powder, and 2-5 parts metallic soap; both sides of the waterstop body are coated with a waterproofing agent.

[0009] Furthermore, the plastic comprises the following weight components: 40-60 parts polyethylene, 10-18 parts EVA copolymerized modified polyethylene, 10-30 parts polypropylene, 5-10 parts plasticizer, 7-12 parts stabilizer, 3-7 parts lubricant, and 3-8 parts colorant.

[0010] A method for processing a composite expansion joint sealing and waterstop strip, the method comprising:

[0011] S1. Mix the raw materials according to their components to form a mixture;

[0012] S2. The mixture is fed into the extrusion mold through the feeding assembly and the hot melt material is extruded through the extrusion head;

[0013] S3. The extruded hot melt material is initially formed into a waterstop through an extrusion mold with a built-in glass fiber mesh;

[0014] S4. The initially formed waterstop is cooled by a combination of water cooling and air cooling components.

[0015] S5. The cooled waterstop is shaped by rolling through the forming component and a waterproofing agent is applied to the outer surface to form the waterstop.

[0016] S6. Use a winding structure to wind up the waterstop and cut it.

[0017] Furthermore, the process of initially forming a waterstop by passing the extruded hot melt material through an extrusion mold containing a glass fiber mesh includes:

[0018] The fiberglass mesh is passed through the extrusion mold, and the end after passing through is connected to the winding structure.

[0019] The hot melt material is filled into the extrusion mold and extruded simultaneously with the glass fiber mesh.

[0020] Furthermore, the feeding assembly includes a feeding cylinder, a feed inlet, stirring rods, stirring blades, a first helical gear, and a rotating shaft. The extrusion mold includes a motor, a heater, a screw, an extruder body, and a second helical gear. The extruder body has a screw inside, and the end of the screw is connected to a motor. The side of the screw has a heater, and the side of the screw has a second helical gear. The top of the extruder body is connected to the feeding cylinder, and the inside of the feeding cylinder is rotatably connected to a rotating shaft. Multiple stirring rods are distributed outside the rotating shaft, and multiple stirring blades are fixed at equal intervals outside the stirring rods. The bottom end of the rotating shaft is connected to the first helical gear, and the second helical gear meshes with the first helical gear.

[0021] Furthermore, the extrusion head includes an upper mold, a guide rod, rollers, a feed port, a discharge port, a groove, and a lower mold; the top of the upper mold is provided with a guide rod, and the top of the upper mold has a through hole; the guide rod facilitates the placement of rolled glass fiber mesh, and the through hole facilitates the insertion of glass fiber mesh; the bottom end of the upper mold is connected to the lower mold, and the interiors of the upper mold and the lower mold form a groove, with a feed port on one side and a discharge port on the other side of the upper mold and the lower mold; rollers are rotatably connected inside the lower mold.

[0022] Furthermore, the extrusion mold includes a pressure plate, a template, a first mold cavity, a second mold cavity, and a third mold cavity. The top of the template is rotatably connected to the pressure plate, and the surface of the template has one or more first mold cavities. The bottom end of each first mold cavity is connected to the second mold cavity, and the side of each second mold cavity has two third mold cavities.

[0023] Furthermore, the water-cooling assembly includes a receiving plate, an overflow plate, a first cooling tank, a second cooling tank, a liquid pump, a distributor, and an inlet pipe; the first cooling tank is located on the side of the extrusion mold, and the side of the first cooling tank is provided with an inclined receiving plate; multiple overflow plates are provided on both sides of the first cooling tank; the bottom of the first cooling tank is provided with a second cooling tank, which can receive the cooling water flowing out of the overflow plates; a liquid pump is provided inside the second cooling tank, and the output end of the liquid pump is connected to the distributor; the distributor is connected to the first cooling tank through multiple inlet pipes; the air-cooling assembly includes a connecting pipe and an air outlet, and there are two air-cooling assemblies, which are inclinedly arranged on the side of the molding assembly; the connecting pipe is connected to the molding assembly, and the side of the connecting pipe is provided with multiple air outlets.

[0024] Furthermore, the forming assembly is provided in two sets, each including an upper pressure roller, a lower pressure roller, a groove, a support frame, a screw, a movable rod, and a slide groove; the lower pressure roller is rotatably connected to the side of the support frame, and a groove is formed on the surface of the lower pressure roller; the lower pressure roller is rotatably connected between the support frames, and a slide groove is formed on the side of the support frame; the movable rod is slidably connected in the slide groove, and the upper pressure roller is rotatably connected between the movable rods; a screw is rotatably connected to the top of the movable rod, and the screw is threadedly connected between the movable rod and the support frame.

[0025] Furthermore, each of the molding components is provided with a coating component on its side, the coating component including a sponge block, a feeding port and a storage box; the storage box is used to hold the waterproofing agent, and the top of the storage box has a feeding port; the side of the storage box is provided with a sponge block.

[0026] Compared with the prior art, the beneficial effects of the present invention include:

[0027] The waterstop of this invention has a triangular structure at the bottom of its connecting structure. This triangular structure makes it easier to insert the waterstop into the expansion joint, and the limiting head prevents the inserted waterstop from being pulled out. An internal fiberglass mesh is added, which increases the overall strength and hardness of the waterstop. Furthermore, during the initial processing of the waterstop, the fiberglass mesh can drive the overall winding of the waterstop, effectively preventing breakage. Additionally, the waterstop of this invention incorporates ultraviolet absorbers, antioxidants, flame retardants, thermoplastic polyamide elastomers, calcium carbonate powder, and gold... This invention comprises a composite waterstop with superior overall performance and a long service life. The ultraviolet absorber absorbs or scatters ultraviolet radiation, preventing damage to the plastic material. The antioxidant inhibits the reaction between oxygen and plastic, slowing down the oxidation and aging process. The flame retardant improves the fire resistance of the plastic material and reduces degradation caused by thermal decomposition and combustion. The thermoplastic polyamide elastomer increases overall elasticity and thermoplasticity. Calcium carbonate powder increases overall rigidity and wear resistance. The metallic soap reduces friction between plastic molecules, improving processing performance and surface quality.

[0028] During processing, the waterstop of the present invention utilizes a specially structured feeding assembly to perform secondary mixing of the raw materials during extrusion. This effectively prevents different raw materials from agglomerating in the feeding cylinder due to factors such as gravity and volume, thereby improving mixing efficiency and further enhancing the quality of the melt.

[0029] The waterstop of the present invention is cooled by a combination of water cooling and air cooling, which has high cooling efficiency. The coolant of the water cooling component falls and cools under the action of gravity and then re-enters the first cooling tank to cool the waterstop, realizing circulation. At the same time, the falling of gravity reduces energy consumption. The air cooling component cools the waterstop again and cleans water stains on the surface of the waterstop to facilitate subsequent rolling and waterproofing agent application.

[0030] The roller pressing assembly of the present invention is used in conjunction with the waterproofing agent application assembly for simultaneous processing. The waterproofing agent is applied while the roller pressing is being performed, which is highly efficient and quick to form. Attached Figure Description

[0031] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0032] Figure 1 This is a schematic diagram of the overall structure of a composite expansion joint sealing and waterstop strip according to the present invention;

[0033] Figure 2 Examples of embodiments of the present invention Figure 1 Enlarged structural diagram at point B;

[0034] Figure 3 This is a schematic diagram of the overall structure of the composite expansion joint sealing and waterstop processing equipment, which is an embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the connection between the molding component and the coating component in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the material feeding assembly and extrusion mold in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the overall structure of the extrusion head in an embodiment of the present invention;

[0038] Figure 7 Examples of embodiments of the present invention Figure 3 An enlarged structural diagram at point A in the diagram;

[0039] Figure labeling: 1. Feeding assembly; 11. Feeding cylinder; 12. Feed inlet; 13. Stirring rod; 14. Stirring blade; 15. First helical gear; 16. Rotating shaft; 2. Extrusion mold; 21. Motor; 22. Heater; 23. Screw; 24. Extruder body; 25. Helical gear; 3. Extrusion head; 31. Upper mold; 32. Trailing rod; 33. Roller; 34. Feed inlet; 35. Discharge outlet; 36. Groove; 37. Lower mold; 4. Extrusion mold; 41. Pressure plate; 42. Template; 43. First mold cavity; 44. Second mold cavity; 45. Third mold cavity; 5. Water 51. Cooling assembly; 52. Receiving plate; 53. Overflow plate; 54. First cooling tank; 55. Second cooling tank; 56. Liquid pump; 57. Liquid distributor; 6. Liquid inlet pipe; 6. Molding assembly; 61. Upper pressure roller; 62. Lower pressure roller; 63. Groove; 64. Support frame; 65. Screw; 66. Movable rod; 67. Slide groove; 7. Waterstop; 71. Waterstop body; 72. Fiberglass mesh; 73. Connector; 74. Limiting head; 8. Coating assembly; 81. Sponge block; 82. Feed port; 83. Storage box; 9. Air-cooled assembly; 91. Connecting pipe; 92. Air outlet. Detailed Implementation

[0040] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0041] This invention provides a composite expansion joint sealing and waterstop strip, such as... Figure 1 and Figure 2As shown, it includes a waterstop body 71, the interior of which is provided with a fiberglass mesh 72, and the side of the waterstop body 71 is provided with one or more sets of connecting structures; the connecting structure includes a connector 73 and a limiting head 74, and the free end of the connector 73 is connected to the limiting head 74 with an arc-shaped structure on both sides; the free end of the connector 73 has a triangular structure.

[0042] The waterstop body 71 comprises the following components by weight: 85-95 parts plastic, 2-5 parts antioxidant, 2-5 parts ultraviolet absorber, 5-10 parts thermoplastic polyamide elastomer, 7-15 parts flame retardant, 3-6 parts calcium carbonate powder, and 2-5 parts metallic soap; both sides of the waterstop body 71 are coated with a waterproofing agent.

[0043] Specifically, the plastic comprises the following weight components: 40-60 parts polyethylene, 10-18 parts EVA copolymerized modified polyethylene, 10-30 parts polypropylene, 5-10 parts plasticizer, 7-12 parts stabilizer, 3-7 parts lubricant, and 3-8 parts colorant.

[0044] The waterstop of the present invention has a triangular structure at the bottom of its connecting structure. The triangular structure makes it easier to insert the waterstop into the expansion joint, and the limiting head makes it difficult to pull out the inserted waterstop.

[0045] The waterstop of the present invention incorporates an ultraviolet absorber within its body. The ultraviolet absorber can absorb or scatter ultraviolet radiation and prevent it from damaging the plastic material. The ultraviolet absorber includes one or more of benzophenones, benzotriazines, and benzyl groups.

[0046] Antioxidants can inhibit the reaction between oxygen and plastics, thus delaying the oxidation and aging process of plastics. Antioxidants include one or more of the following: thiophenols, phosphate esters, and phenolic compounds.

[0047] Flame retardants can improve the fire resistance of plastic materials and reduce the deterioration caused by thermal decomposition and combustion; flame retardants include one or more of the following: bromine-based, chlorine-based, and phosphorus-based.

[0048] Thermoplastic polyamide elastomers increase overall elasticity and thermoplasticity;

[0049] Calcium carbonate powder increases overall rigidity and wear resistance;

[0050] Metallic soaps reduce friction between plastic molecules, improving processing performance and surface quality;

[0051] A composite expansion joint sealing and waterstop strip, the processing method of which includes the following steps:

[0052] S1. Mix the raw materials according to their components to form a mixture;

[0053] Specifically, the raw materials for the waterstop are as follows: 85-95 parts plastic, 2-5 parts antioxidant, 2-5 parts ultraviolet absorber, 5-10 parts thermoplastic polyamide elastomer, 7-15 parts flame retardant, 3-6 parts calcium carbonate powder, and 2-5 parts metallic soap; the plastic includes the following weight components: 40-60 parts polyethylene, 10-18 parts EVA copolymerized modified polyethylene, 10-30 parts polypropylene, 5-10 parts plasticizer, 7-12 parts stabilizer, 3-7 parts lubricant, and 3-8 parts colorant.

[0054] The raw materials are mixed according to the proportions of the components.

[0055] S2. The mixture is fed into the extrusion mold through the feeding assembly and the hot melt material is extruded through the extrusion head;

[0056] The specific operating method is as follows:

[0057] The fiberglass mesh is passed through the extrusion mold, and the end after passing through is connected to the winding structure.

[0058] The hot melt material is filled into the extrusion mold and extruded simultaneously with the glass fiber mesh.

[0059] The structure of the feeding components and extrusion mold is as follows: Figure 3 and Figure 5 As shown, specifically, the feeding assembly 1 includes a feeding cylinder 11, a feed inlet 12, a stirring rod 13, a stirring blade 14, a first helical gear 15, and a rotating shaft 16. The extrusion mold 2 includes a motor 21, a heater 22, a screw 23, an extruder body 24, and a second helical gear 25. The screw 23 is located inside the extruder body 24, and the end of the screw 23 is connected to the motor 21. The heater 22 is located on the side of the screw 23, and the second helical gear 25 is located on the side of the screw 23. The top of the extruder body 24 is connected to the feeding cylinder 11, and the rotating shaft 16 is rotatably connected inside the feeding cylinder 11. Multiple stirring rods 15 are distributed outside the rotating shaft 16. 3. Multiple stirring blades 14 are fixed at equal intervals on the outside of the stirring rod 13; the bottom end of the rotating shaft 16 is connected to the first helical gear 15, and the second helical gear 25 meshes with the first helical gear 15; the prepared raw materials enter the feeding cylinder 11 through the feed pipe 12, the heater 22 and the motor 21 are started, and as the motor 21 is started, the screw 23 begins to rotate. When the screw 23 rotates, it drives the second helical gear 25 to rotate. The second helical gear 25 drives the first helical gear 15 to rotate through gear meshing, which in turn drives the rotating shaft 16 to rotate. When the rotating shaft 16 rotates in the feeding cylinder 11, it can drive the stirring blades 14 and the stirring rod 13 to rotate, and perform secondary stirring of the ingredients in the feeding cylinder 11.

[0060] The structure of the extrusion head 3 is as follows: Figure 6As shown, the extrusion head 3 includes an upper mold 31, a drag bar 32, a roller 33, a feed port 34, a discharge port 35, a groove 36, and a lower mold 37. The upper mold 31 has a drag bar 32 at its top end, and a through hole at its top end. The drag bar 32 facilitates the placement of rolled glass fiber mesh 72, and the through hole facilitates the insertion of the glass fiber mesh. The upper mold 31 is connected to the lower mold 37. The groove 36 is formed inside the upper mold 31 and the lower mold 37, and the groove 36 is used to form an extrusion cavity for extrusion. The upper mold 31 and the lower mold 37 have a feed port 34 on one side and a discharge port 35 on the other side. The roller 33 is rotatably connected inside the lower mold 37, and the roller 33 facilitates the conveying of the glass fiber mesh 72.

[0061] S3. The extruded hot melt material is initially formed into a waterstop through an extrusion mold with a built-in glass fiber mesh;

[0062] Specifically, the structure of the extrusion mold is as follows: Figure 3 and Figure 7 As shown, the extrusion mold 4 includes a pressure plate 41, a template 42, a first mold cavity 43, a second mold cavity 44, and a third mold cavity 45. The top of the template 42 is rotatably connected to the pressure plate 41, and the surface of the template 42 has one or more first mold cavities 43. The bottom end of each first mold cavity 43 is connected to the second mold cavity 44, and the side of each second mold cavity 44 is provided with two third mold cavities 45. The third mold cavity 45 is used to form the limiting head 74 of the waterstop, the second mold cavity 44 is used to form the connecting head 73 of the waterstop, and the first mold cavity 43 is used to form the waterstop body 71. The waterstop can be initially formed by extruding the molten material into the extrusion mold 4.

[0063] S4. The initially formed waterstop is cooled by a combination of water cooling and air cooling components.

[0064] Specifically, the water-cooling component 5 is as follows: Figure 3 As shown, the water-cooling assembly 5 includes a receiving plate 51, an overflow plate 52, a first cooling tank 53, a second cooling tank 54, a liquid pump 55, a distributor 56, and an inlet pipe 57. The first cooling tank 53 is located on the side of the extrusion mold 4, and the side of the first cooling tank 53 is provided with an inclined receiving plate 51, which is used to receive the waterstop strip after extrusion. Multiple overflow plates 52 are provided on both sides of the first cooling tank 53. The bottom of the first cooling tank 53 is provided with a second cooling tank 54, which can receive the cooling water flowing out of the overflow plate 52. The second cooling tank 54 is provided with a liquid pump 55 inside, and the output end of the liquid pump 55 is connected to the distributor 56. The distributor 56 is connected to the first cooling tank 53 through multiple inlet pipes 57.

[0065] The air-cooling component 9 includes a connecting pipe 91 and an air outlet 92. There are two air-cooling components 9, and the two air-cooling components 9 are inclinedly arranged on the side of the molding component 6. The connecting pipe 91 is connected to the molding component 6, and the side of the connecting pipe 91 is provided with multiple air outlets 92. The connecting pipe 91 is used to connect to the blower.

[0066] The water-cooling assembly 5 cools the waterstop 7 by water cooling and continuously pumps the cooling water in the second cooling tank 54 into the first cooling tank 53 through the liquid pump 55. The cooling water in the first cooling tank 53 overflows and falls back into the second cooling tank 54 through the overflow plate 52. The falling cooling water dissipates heat in the air and enters the second cooling tank 54 again so that it can be transferred back into the first cooling tank 53 for use. The design of multiple overflow plates 52 can improve the cooling effect, and the design of multiple liquid inlet pipes 57 can input the cooling water into the first cooling tank 53 in a dispersed manner to cool the waterstop 7.

[0067] The air-cooled component 9 further enhances the heat dissipation effect while removing water stains from the surface of the waterstop 7 to facilitate subsequent rolling and application of waterproofing agent.

[0068] S5. The cooled waterstop is shaped by rolling through the forming component and a waterproofing agent is applied to the outer surface to form the waterstop.

[0069] Specifically, the molding component 6 is as follows: Figure 3 As shown, the molding assembly 6 has two sets. The molding assembly 6 includes an upper pressure roller 61, a lower pressure roller 62, a groove 63, a support frame 64, a screw 65, a movable rod 66, and a slide groove 67. The lower pressure roller 62 is rotatably connected to the side of the support frame 64, and the groove 63 is formed on the surface of the lower pressure roller 62. The lower pressure roller 62 is rotatably connected between the support frames 64, and the slide groove 67 is formed on the side of the support frame 64. The movable rod 66 is slidably connected in the slide groove 67, and the upper pressure roller 61 is rotatably connected between the movable rods 66. The top end of the movable rod 66 is rotatably connected to the screw 65, and the screw 65 is threadedly connected between the movable rod 66 and the support frame 64.

[0070] The groove 63 on the surface of the lower pressure roller 62 is used to fit the connector 73 and the limiting head 74 of the waterstop 7. The movable rod 66 can be raised and lowered under the rotation of the screw 65, thereby changing the indirect distance between the two pressure rollers and realizing the roll forming of waterstops 7 of different thicknesses.

[0071] While the waterstop 7 is being rolled, a waterproofing agent can also be applied to both sides, such as... Figure 3 and 4As shown, each molding component 6 has a coating component 8 on its side. The coating component 8 includes a sponge block 81, a feeding port 82, and a storage box 83. The storage box 83 is used to hold the waterproofing agent, and the top of the storage box 83 has a feeding port 82. The side of the storage box 83 has a sponge block 81. The waterproofing agent is added into the storage box 83 through the feeding port 82. The agent reaches the surface of the pressure roller through the squeezing of the sponge block 81, so that it can be coated onto the surface of the waterstop 7 by the rotating pressure roller. Both molding components 6 have coating components on their sides to achieve two coatings and improve coating efficiency.

[0072] S6. Use a winding structure to wind up the waterstop and cut it.

[0073] The processing equipment for the waterstop of this invention is as follows: Figure 3 As shown, when processing the waterstop 7 of the present invention, the raw materials are first prepared according to the following weight proportions: 85-95 parts plastic, 2-5 parts antioxidant, 2-5 parts ultraviolet absorber, 5-10 parts thermoplastic polyamide elastomer, 7-15 parts flame retardant, 3-6 parts calcium carbonate powder, and 2-5 parts metallic soap; wherein the plastic includes the following weight components: 40-60 parts polyethylene, 10-18 parts EVA copolymerized modified polyethylene, 10-30 parts polypropylene, 5-10 parts plasticizer, 7-12 parts stabilizer, 3-7 parts lubricant, and 3-8 parts colorant; the rolled glass fiber mesh 72 is placed on the surface of the drag bar 32, and one end of the glass fiber mesh passes through the through hole of the upper mold 31 and the roller 33, passes through the upper pressure roller 61 and the lower pressure roller 62 to reach the winding structure and is fixed thereto;

[0074] Then, the mixed raw materials are fed into the feeding cylinder 11 through the feed port 12. At the same time, the motor 21 and the heater 22 are turned on. As the motor 21 starts, the screw 23 begins to rotate. When the screw 23 rotates, it drives the second helical gear 25 to rotate. The second helical gear 25 drives the first helical gear 15 to rotate through gear meshing, which in turn drives the rotating shaft 16 to rotate. When the rotating shaft 16 rotates in the feeding cylinder 11, it drives the stirring blade 14 and the stirring rod 13 to rotate, and then stirs the ingredients in the feeding cylinder 11 for a second time. At the same time, the rotation of the motor 21 drives the screw 23 to rotate and push the raw materials into the heater 22 for heating and melting. The molten raw materials enter the extrusion head 3. The raw materials entering the extrusion head 3 combine with the glass fiber mesh 72 and are output into the extrusion mold 4 for molding. After molding, the materials pass through the water cooling component 5 and the air cooling component 9. Due to the winding structure, the glass fiber mesh 72 is wound up, which can pull the waterstop 7 to the molding component 6 for roll forming and waterproofing agent application. Then, it is connected to the winding structure to complete the processing of the waterstop 7.

[0075] The waterstop of this invention has a triangular structure at the bottom of its connecting structure. This triangular structure makes it easier to insert the waterstop into the expansion joint, and the limiting head prevents the inserted waterstop from being pulled out. An internal fiberglass mesh is added, which increases the overall strength and hardness of the waterstop. Furthermore, during the initial processing of the waterstop, the fiberglass mesh can drive the overall winding of the waterstop, effectively preventing breakage. Additionally, the waterstop of this invention incorporates ultraviolet absorbers, antioxidants, flame retardants, thermoplastic polyamide elastomers, calcium carbonate powder, and gold... This invention comprises a composite waterstop with superior overall performance and a long service life. The ultraviolet absorber absorbs or scatters ultraviolet radiation, preventing damage to the plastic material. The antioxidant inhibits the reaction between oxygen and plastic, slowing down the oxidation and aging process. The flame retardant improves the fire resistance of the plastic material and reduces degradation caused by thermal decomposition and combustion. The thermoplastic polyamide elastomer increases overall elasticity and thermoplasticity. Calcium carbonate powder increases overall rigidity and wear resistance. The metallic soap reduces friction between plastic molecules, improving processing performance and surface quality.

[0076] During processing, the waterstop of the present invention utilizes a specially structured feeding assembly to perform secondary mixing of the raw materials during extrusion. This effectively prevents different raw materials from agglomerating in the feeding cylinder due to factors such as gravity and volume, thereby improving mixing efficiency and further enhancing the quality of the melt.

[0077] The waterstop of the present invention is cooled by a combination of water cooling and air cooling, which has high cooling efficiency. The coolant of the water cooling component falls and cools under the action of gravity and then re-enters the first cooling tank to cool the waterstop, realizing circulation. At the same time, the falling of gravity reduces energy consumption. The air cooling component cools the waterstop again and cleans water stains on the surface of the waterstop to facilitate subsequent rolling and waterproofing agent application.

[0078] The roller pressing assembly of the present invention is used in conjunction with the waterproofing agent application assembly for simultaneous processing. The waterproofing agent is applied while the roller pressing is being performed, which is highly efficient and quick to form.

[0079] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A composite expansion joint sealing and waterstop, characterized in that: The device includes a waterstop body, the interior of which is provided with a fiberglass mesh, and the side of the waterstop body is provided with one or more sets of connecting structures; the connecting structure includes a connector and a limiting head, and the free end of the connector is connected to the limiting head with an arc-shaped structure on both sides; the free end of the connector has a triangular structure. The waterstop body comprises the following components by weight: 85-95 parts plastic, 2-5 parts antioxidant, 2-5 parts ultraviolet absorber, 5-10 parts thermoplastic polyamide elastomer, 7-15 parts flame retardant, 3-6 parts calcium carbonate powder, and 2-5 parts metallic soap; both sides of the waterstop body are coated with a waterproofing agent.

2. The composite expansion joint sealing and waterstop strip according to claim 1, characterized in that: The plastic comprises the following components by weight: 40-60 parts polyethylene, 10-18 parts EVA copolymerized modified polyethylene, 10-30 parts polypropylene, 5-10 parts plasticizer, 7-12 parts stabilizer, 3-7 parts lubricant, and 3-8 parts colorant.

3. The processing method of the composite expansion joint sealing and waterstop as described in claim 2, characterized in that: The processing method includes: S1. Mix the raw materials according to their components to form a mixture; S2. The mixture is fed into the extrusion mold through the feeding assembly and the hot melt material is extruded through the extrusion head; S3. The extruded hot melt material is initially formed into a waterstop through an extrusion mold with a built-in glass fiber mesh; S4. The initially formed waterstop is cooled by a combination of water cooling and air cooling components. S5. The cooled waterstop is shaped by rolling through the forming component and a waterproofing agent is applied to the outer surface to form the waterstop. S6. Use a winding structure to wind up the waterstop and cut it.

4. The processing method of a composite expansion joint sealing and waterstop according to claim 3, characterized in that: The process of initially forming a waterstop by passing the extruded hot melt material through an extrusion mold containing a glass fiber mesh includes: The fiberglass mesh is passed through the extrusion mold, and the end after passing through is connected to the winding structure. The hot melt material is filled into the extrusion mold and extruded simultaneously with the glass fiber mesh.

5. A processing method for a composite expansion joint sealing and waterstop according to claim 3 or 4, characterized in that: The feeding assembly includes a feeding cylinder, a feed inlet, stirring rods, stirring blades, a first helical gear, and a rotating shaft. The extrusion mold includes a motor, a heater, a screw, an extruder body, and a second helical gear. The extruder body has a screw inside, and the end of the screw is connected to a motor. The side of the screw has a heater, and the side of the screw has a second helical gear. The top of the extruder body is connected to the feeding cylinder, and the inside of the feeding cylinder is rotatably connected to a rotating shaft. Multiple stirring rods are distributed outside the rotating shaft, and multiple stirring blades are fixed at equal intervals outside the stirring rods. The bottom of the rotating shaft is connected to the first helical gear, and the second helical gear meshes with the first helical gear.

6. A processing method for a composite expansion joint sealing and waterstop strip according to claim 3 or 4, characterized in that: The extrusion head includes an upper die, a guide rod, rollers, a feed inlet, a discharge outlet, a groove, and a lower die. The upper die has a guide rod at its top and a through hole at its top. The guide rod facilitates the placement of rolled glass fiber mesh, and the through hole facilitates the insertion of the glass fiber mesh. The bottom of the upper die is connected to the lower die. The interiors of the upper and lower dies form grooves, and the upper and lower dies have a feed inlet on one side and a discharge outlet on the other side. Rollers are rotatably connected inside the lower die.

7. A processing method for a composite expansion joint sealing and waterstop strip according to claim 3 or 4, characterized in that: The extrusion mold includes a pressure plate, a template, a first mold cavity, a second mold cavity, and a third mold cavity. The top of the template is rotatably connected to the pressure plate, and the surface of the template has one or more first mold cavities. The bottom of each first mold cavity is connected to the second mold cavity, and the side of each second mold cavity has two third mold cavities.

8. A processing method for a composite expansion joint sealing and waterstop according to claim 3 or 4, characterized in that: The water-cooling assembly includes a receiving plate, an overflow plate, a first cooling tank, a second cooling tank, a liquid pump, a distributor, and an inlet pipe. The first cooling tank is located on the side of the extrusion mold, and an inclined receiving plate is provided on the side of the first cooling tank. Multiple overflow plates are provided on both sides of the first cooling tank. The bottom of the first cooling tank is provided with a second cooling tank, which can receive cooling water flowing out of the overflow plates. A liquid pump is provided inside the second cooling tank, and the output end of the liquid pump is connected to the distributor. The distributor is connected to the first cooling tank through multiple inlet pipes. The air-cooling assembly includes a connecting pipe and an air outlet. There are two air-cooling assemblies, and the two air-cooling assemblies are inclinedly arranged on the side of the molding assembly. The connecting pipe is connected to the molding assembly, and multiple air outlets are provided on the side of the connecting pipe.

9. A processing method for a composite expansion joint sealing and waterstop according to claim 3 or 4, characterized in that: The forming assembly has two sets, each including an upper pressure roller, a lower pressure roller, a groove, a support frame, a screw, a movable rod, and a slide groove. The lower pressure roller is rotatably connected to the side of the support frame, and a groove is formed on the surface of the lower pressure roller. The lower pressure roller is rotatably connected between the support frames, and a slide groove is formed on the side of the support frame. The movable rod is slidably connected in the slide groove, and the upper pressure roller is rotatably connected between the movable rods. A screw is rotatably connected to the top of the movable rod, and the screw is threadedly connected to the support frame.

10. A processing method for a composite expansion joint sealing and waterstop according to claim 3 or 4, characterized in that: Each of the molding components has a coating component on its side, the coating component including a sponge block, a feeding port and a storage box; the storage box is used to hold the waterproofing agent, and the top of the storage box has a feeding port; the side of the storage box is provided with a sponge block.

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