A rubber water stop production equipment and process

Abstract

The present invention relates to the technical field of waterstop production, and proposes a rubber waterstop production equipment and process, including a machine body, the machine body having an extrusion cavity, the extrusion cavity having an inlet and an outlet, a feed hopper arranged on the machine body, the outlet of the feed hopper being connected to the inlet, a spiral conveyor arranged in the extrusion cavity, an extrusion die arranged at the outlet of the extrusion cavity, an extrusion die having an extrusion channel, a core die arranged in the extrusion channel, one end of the core die being a free end, the free end of the core die being close to the outlet end of the extrusion channel, the core die being divided into a cylindrical section and a conical section from the free end to the other end, the end of the conical section having a larger cross-sectional area being close to the cylindrical section, and the core die being used to form the center hole of the waterstop. Through the above technical scheme, the problem of rough inner surface and poor quality of the center hole of the waterstop produced in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waterstop production, and in particular to a rubber waterstop production device and process. Background Art

[0002] The embedded rubber waterstop is a rubber product that is embedded in the joints of concrete structures. It prevents water from leaking at the joints through its own elastic deformation ability and sealing performance.

[0003] The embedded rubber waterstop plays a key role in waterproofing in deformation joints (such as expansion joints, settlement joints, etc.), construction joints and other joints that need waterproofing in various types of concrete buildings. It can adapt to the deformation of the joints caused by temperature changes, structural settlement or expansion, etc., while maintaining a good sealing effect to ensure the waterproof performance of the building.

[0004] The middle of the embedded rubber waterstop is usually provided with a center hole to further improve its elastic deformation ability. However, the inner surface of the center hole of the embedded rubber waterstop manufactured by existing production equipment is often rougher than the outer surface and the quality is poor. This rough inner surface not only weakens the deformation performance of the waterstop, but also increases the risk of fracture, thus shortening its service life. Summary of the invention

[0005] The invention provides a rubber water stop production device and process, which solves the problem of rough inner surface and poor quality of the central hole of the water stop produced in the prior art.

[0006] The technical solution of the present invention is as follows: a rubber water stop production device, comprising:

[0007] a machine body, the machine body having an extrusion cavity, the extrusion cavity having an inlet and an outlet,

[0008] A feed hopper, the feed hopper is arranged on the machine body, and the outlet of the feed hopper is connected with the inlet,

[0009] A screw conveyor, wherein the screw conveyor is arranged in the extrusion chamber,

[0010] An extrusion die, wherein the extrusion die is arranged at the outlet of the extrusion cavity, and the extrusion die has an extrusion channel,

[0011] A core mold, wherein the core mold is arranged in the extrusion channel, one end of the core mold is a free end, the free end of the core mold is close to the outlet end of the extrusion channel, the core mold is divided into a cylindrical section and a conical section from the free end to the other end, the end of the conical section with a larger cross-sectional area is close to the cylindrical section, and the core mold is used to form the center hole of the water stop belt.

[0012] As a further technical solution,

[0013] The cylindrical section is cylindrical, and the conical section is truncated cone or conical.

[0014] As a further technical solution,

[0015] The outer wall of the core mold has an annular protrusion, the annular protrusion is close to the free end of the core mold, the surface of the annular protrusion is smoothly connected to the side wall of the core mold, and the core mold and the annular protrusion are formed in one piece.

[0016] As a further technical solution,

[0017] The extrusion channel is divided into a feeding transition section, a preforming section, a forming transition section and a forming section in sequence. The preforming section and the forming section are both cylindrical. The cross-sectional shape of the forming section is the same as the cross-sectional shape of the preforming section. The cross-sectional area of ​​the forming section is smaller than the cross-sectional area of ​​the preforming section. Both ends of the forming transition section are smoothly connected to the forming section and the preforming section respectively.

[0018] As a further technical solution,

[0019] The conical section is located at the pre-forming section and the forming transition section, and the cylindrical section is located at the forming section.

[0020] As a further technical solution,

[0021] The extrusion cavity is in a truncated cone shape, and the outlet is located at the end of the extrusion cavity with a smaller diameter.

[0022] The spiral conveyor comprises:

[0023] a rotating shaft, the rotating shaft being rotatably disposed in the extrusion chamber,

[0024] A spiral conveying blade is arranged on the rotating shaft, and the pitch of the spiral conveying blade gradually increases from one end close to the outlet to the other end.

[0025] As a further technical solution,

[0026] The feed transition section has a mounting seat, and the core mold is detachably arranged on the mounting seat.

[0027] As a further technical solution,

[0028] The mounting seat is provided with a slot, and one end of the core mold is used for being locked in the slot.

[0029] As a further technical solution, it also includes:

[0030] A grinding piece is rotatably arranged at the free end of the core mold, and is used to grind the inner wall of the center hole of the formed water stop belt smooth.

[0031] A rubber water stop production process is also proposed, using the rubber water stop production equipment, comprising the following steps:

[0032] S1: Add material into the feed hopper, and the material enters the extrusion chamber through the inlet;

[0033] S2: The heating system in the extrusion cavity heats the material and makes it into a plasticized state, and the plasticized material is pushed to move along the extrusion cavity by the spiral conveyor. The plasticized material passes through the extrusion die and is formed into a water stopper.

[0034] The working principle and beneficial effects of the present invention are:

[0035] In the present invention, the extrusion chamber of the machine body provides a closed processing space for the production of rubber waterstop, and the feed hopper is connected to the inlet, so that the rubber raw material can smoothly enter the extrusion chamber to prepare for subsequent processing. The spiral conveyor conveys and preliminarily extrude the material in the extrusion chamber, and pushes the material to move toward the outlet. The extrusion channel of the extrusion die provides a specific shape space for the final molding of the material into a rubber waterstop, and the core mold is located in the extrusion channel, and one of its key functions is to form the center hole of the waterstop. The existence of the core mold changes the flow path and distribution state of the material, especially its conical section. When the material flows through, it moves from the end with a smaller diameter to the end with a larger diameter, which can guide the material to gradually diffuse and extrude to the surroundings, thereby forming a denser and smoother center hole, improving the smoothness and processing quality at the center hole of the waterstop, and improving the deformation ability and service life of the waterstop. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0038] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0039] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0040] Figure 4 For the present invention Figure 3 Schematic diagram of the AA section structure;

[0041] Figure 5 Schematic diagram of the three-dimensional structure of the extrusion die of the present invention Figure 1 ;

[0042] Figure 6 Schematic diagram of the three-dimensional structure of the extrusion die of the present invention Figure 2 ;

[0043] Figure 7 This is a schematic diagram of the main structure of the extrusion die of the present invention;

[0044] Figure 8 For the present invention Figure 7 Schematic diagram of the BB cross-section structure;

[0045] Fig. 9 For the present invention Figure 7 Schematic diagram of the CC cross-section structure;

[0046] Fig.10 It is a schematic diagram of the structure of the water stop strip of the present invention;

[0047] In the figure: 1-body, 11-extrusion chamber, 12-inlet, 13-outlet, 2-feed hopper, 3-screw conveyor, 31-rotating shaft, 32-screw conveyor blade, 4-extrusion die, 41-extrusion channel, 42-feed transition section, 43-preforming section, 44-forming transition section, 45-forming section, 5-core mold, 51-cylindrical section, 52-conical section, 53-annular protrusion, 6-mounting seat, 61-slot, 7-grinding piece, 71-shaft body, 72-first grinding head, 73-second grinding head, 9-waterstop, 91-center hole. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0049] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0050] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] like Figure 1-10 As shown, the present invention proposes a rubber waterstop production equipment, including a body 1, a feed hopper 2, a spiral conveyor 3, an extrusion die 4 and a core mold 5, the body 1 has an extrusion cavity 11, the extrusion cavity 11 has an inlet 12 and an outlet 13, the feed hopper 2 is arranged on the body 1, the outlet of the feed hopper 2 is connected to the inlet 12, the spiral conveyor 3 is arranged in the extrusion cavity 11, the extrusion die 4 is arranged at the outlet 13 of the extrusion cavity 11, the extrusion die 4 has an extrusion channel 41, the core mold 5 is arranged in the extrusion channel 41, one end of the core mold 5 is a free end, the free end of the core mold 5 is close to the outlet end of the extrusion channel 41, the core mold 5 is divided into a cylindrical section 51 and a conical section 52 from the free end to the other end, the end of the conical section 52 with a larger cross-sectional area is close to the cylindrical section 51, and the core mold 5 is used to form the center hole 91 of the waterstop 9.

[0053] In this embodiment, the extrusion chamber 11 of the machine body 1 provides a closed processing space for the production of rubber waterstops. The feed hopper 2 is connected to the inlet 12, so that the rubber raw material can smoothly enter the extrusion chamber 11 to prepare for subsequent processing. The spiral conveyor 3 conveys and preliminarily extrude the material in the extrusion chamber 11, and pushes the material to move toward the outlet 13. The extrusion channel 41 of the extrusion die 4 provides a specific shape space for the material to be finally formed into a rubber waterstop, and the core mold 5 is located in the extrusion channel 41, and one of its key functions is to form the center hole 91 of the waterstop 9. The existence of the core mold 5 changes the flow path and distribution state of the material, especially its conical section 52. When the material flows through, it moves from the end with a smaller diameter to the end with a larger diameter, which can guide the material to gradually diffuse and extrude to the surroundings, thereby forming a more dense and smooth center hole 91, improving the smoothness and processing quality at the center hole 91 of the waterstop, and improving the deformation ability and service life of the waterstop.

[0054] Furthermore, the cylindrical section 51 is cylindrical, and the conical section 52 is truncated cone or conical.

[0055] In this embodiment, Figure 8As shown, the cylindrical section 51 is designed to be cylindrical, which provides a stable shape foundation for the center hole 91 during the production process of the water stop. When the material flows around the core mold, the cylindrical cylindrical section 51 can make the size of the center hole 91 uniform in the circumferential direction, which is conducive to forming a smooth inner wall. This regular shape helps the water stop 9 to be uniformly stressed and deformed during use, improves its sealing performance and ability to adapt to deformation. At the same time, combined with the tapered section 52, it can better guide the flow of materials, make the formation of the center hole 91 smoother, and reduce the problems of poor material flow and rough inner wall caused by sudden changes in shape. The tapered section 52 is designed to be truncated or conical, and the end with a larger cross-sectional area is close to the cylindrical section. During the extrusion of the material, the tapered section 52 can guide the material to gradually flow and evenly distribute from the end with a smaller cross-sectional area to the end with a larger cross-sectional area, that is, the direction of the cylindrical section 51 according to its shape characteristics. This gradual transition design allows the material to be extruded and formed in a more orderly manner around the center hole when forming the center hole, thereby making the center hole more dense and smooth. At the same time, the uniform flow of materials also helps to form a smooth inner wall of the center hole, reducing the roughness and defects of the inner wall caused by uneven material flow. The cooperation of the conical section 52 and the cylindrical section 51 can effectively improve the quality of the center hole and enhance the deformation performance of the center hole 91 of the water stop 9.

[0056] Furthermore, the outer wall of the core mold 5 has an annular protrusion 53 , which is close to the free end of the core mold 5 , and the surface of the annular protrusion 53 is smoothly connected to the side wall of the core mold 5 , and the core mold 5 and the annular protrusion 53 are formed integrally.

[0057] In this embodiment, Figure 8 As shown, the annular protrusion 53 on the outer wall of the core mold 5 is close to the free end and is formed integrally with the core mold 5, which significantly enhances the overall structural strength of the core mold 5. During the production process, the core mold 5 needs to withstand various forces such as pressure and friction of the material. The presence of the annular protrusion 53 increases the wall thickness and structural stability of the core mold 5 near the free end of the key part, making it less likely to deform or damage during long-term use. This is crucial to ensure the shape and dimensional stability of the center hole, and can ensure that the center hole 91 of each water stop 9 has consistent quality standards during continuous production. The stable core mold 5 structure helps the material to maintain uniform pressure distribution when flowing around the core mold 5, so that the density and smoothness of the center hole 91 are more uniform, improving the quality of the center hole 91 and the overall performance of the water stop 9. In addition, the annular protrusion 53 has a smooth surface and protrudes a certain height from the core mold 5, which can play a role in further extruding the center hole 91 after molding, and further improve the smoothness and density of the center hole 91.

[0058] The surface of the annular protrusion 53 is smoothly connected to the side wall of the core mold 5, and can play a certain role in regulating the flow of the material when the material flows through the core mold 5. When the material is guided by the conical section 52 of the core mold 5 to be squeezed around to form the center hole 91, the annular protrusion 53 can make the material more evenly distributed around the core mold 5, avoiding excessive accumulation of the material at the free end or too fast flow rate, thereby ensuring the uniformity of the material thickness and quality stability during the formation of the center hole 91. At the same time, the smooth connection surface reduces the friction resistance between the material and the core mold 5, reduces the possibility of the material sticking to the core mold 5, and is conducive to improving production efficiency and product quality. The inner wall of the center hole 91 is made smoother, reducing internal defects and rough surfaces caused by uneven distribution of materials, and further enhancing the density of the center hole 91 and the sealing performance of the water stop 9.

[0059] Furthermore, the extrusion channel 41 is divided into a feed transition section 42, a preforming section 43, a forming transition section 44 and a forming section 45 in sequence. The preforming section 43 and the forming section 45 are both cylindrical. The cross-sectional shape of the forming section 45 is the same as the cross-sectional shape of the preforming section 43. The cross-sectional area of ​​the forming section 45 is smaller than the cross-sectional area of ​​the preforming section 43. The two ends of the forming transition section 44 are smoothly connected to the forming section 45 and the preforming section 43 respectively.

[0060] In this embodiment, Figure 8 The feed transition section 42 of the extrusion channel 41 shown plays a transitional role in connecting the extrusion cavity 11 and the subsequent forming section. It can make the material coming out of the spiral conveyor 3 smoothly transition to the pre-forming section 43, avoiding the material from experiencing a sharp flow change and impact when entering the forming area. For the formation of the center hole 91, the feed transition section 42 can ensure that the material enters the pre-forming section 43 in a relatively stable state, so that when the conical section 52 of the core mold 5 guides the material to form the center hole, the initial flow state of the material is more uniform. This is conducive to the center hole having a better shape and size foundation during the initial forming, providing a good start for the subsequent further forming, thereby improving the quality and shape accuracy of the center hole 91, making it denser and smoother.

[0061] The preforming section 43 and the forming section 45 are both cylindrical, and the cross-sectional area of ​​the forming section 45 is smaller than that of the preforming section 43. The preforming section 43 provides a space for the material to initially form the prototype of the center hole 91 around the core mold 5. At this stage, the material begins to be initially distributed and shaped according to the shape of the core mold 5 and the limitations of the extrusion channel 41. When the material enters the forming transition section 44 and finally reaches the forming section 45, the material is further extruded and shaped due to the gradual reduction of the cross-sectional area, making the center hole 91 more dense and precise. This segmented design and the change of the cross-sectional area can accurately control the shape and size of the center hole 91 to meet the design requirements. In the process of forming the center hole 91, the coordinated work of the preforming section 43 and the forming section 45 enables the material to gradually form a dense and smooth center hole 91 structure under different pressure and space conditions, ensuring the stability of the forming quality and dimensional accuracy of the center hole during the entire extrusion process.

[0062] The two ends of the forming transition section 44 are smoothly connected to the forming section 45 and the pre-forming section 43 respectively. This design is very critical for the forming of the center hole 91. It can avoid problems such as poor flow and stress concentration in the transition process from the pre-forming section 43 to the forming section 45. In the process of forming the center hole 91, the smooth connection allows the material to naturally and smoothly transition from the pre-forming section 43 with a larger cross-sectional area to the forming section 45 with a smaller cross-sectional area, ensuring the flow stability and continuity of the material when the center hole 91 is formed around the core mold 5. Thereby further improving the quality and production efficiency of the center hole 91, reducing the internal defects and irregular shapes of the center hole 91 caused by poor flow, making the inner wall of the center hole smoother and more dense, and meeting the high quality requirements of the embedded rubber waterstop.

[0063] Furthermore, the conical section 52 is located at the pre-forming section 43 and the forming transition section 44 , and the cylindrical section 51 is located at the forming section 45 .

[0064] In this embodiment, the conical section 52 of the core mold 5 is arranged at the preforming section 43 and the forming transition section 44, and the cylindrical section 51 is arranged at the forming section 45. This layout is closely matched with the various sections of the extrusion channel to jointly ensure the high-quality forming of the center hole 91. In the early stage of material extrusion, when the material enters the preforming section 43 and the forming transition section 44, the conical section 52 of the core mold 5 can adapt well to the shape change of the extrusion channel 41, guide the material to gradually flow around the core mold 5 and initially form the shape of the center hole 91. At this time, the gradual diameter change of the conical section 52 can make the material more smoothly adapt to the change of the cross-sectional area of ​​the extrusion channel 41, ensure the shape and size accuracy of the center hole 91 in the early stage of formation, and provide good guidance for the material to be uniformly extruded around. The cross-sectional area at the forming transition section 44 gradually decreases, and the cross-sectional area at the conical section 52 gradually increases, making the center hole 91 more compact.

[0065] When the material enters the forming section 45, the cylindrical section 51 of the core mold 5 can further accurately shape the center hole 91 that has been initially formed. In terms of the smoothness of the inner wall of the center hole, the cooperation between the cylindrical section and the forming section can make the material more evenly distributed and compacted in the final forming stage, reduce the unevenness and roughness of the inner wall, and thus make the inner wall of the center hole 91 smoother. This collaborative working mode of the core mold 5 and the sections of the extrusion channel 41 ensures the quality stability of the center hole 91 of the water stop 9 during the entire extrusion forming process, making the center hole 91 both dense and smooth, and can effectively adapt to various complex situations at the joints of the concrete structure, thereby improving the waterproof effect and service life of the building.

[0066] Furthermore, the extrusion chamber 11 is truncated cone-shaped, and the outlet 13 is located at the end of the extrusion chamber 11 with a smaller diameter. The spiral conveying member 3 includes a rotating shaft 31 and a spiral conveying blade 32. The rotating shaft 31 is rotatably arranged in the extrusion chamber 11, and the spiral conveying blade 32 is arranged on the rotating shaft 31. The pitch of the spiral conveying blade 32 gradually increases from one end close to the outlet 13 to the other end.

[0067] In this embodiment, Figure 4 As shown, the extrusion chamber 11 is designed to be truncated cone-shaped, and the outlet is located at the end with a smaller diameter. This shape design has many advantages in the material conveying process. As the material moves from the larger diameter end to the smaller diameter end, the extrusion force on the material gradually increases, which helps to improve the density and uniformity of the material. In the process of forming the center hole 91, this gradually increasing extrusion force can make the material flow more tightly around the core mold 5, forming a more compact center hole 91 structure.

[0068] The pitch of the spiral conveying blade 32 gradually increases from one end near the outlet 13 to the other end. In the early stage of material transportation, the material near the outlet 13 requires a greater thrust to quickly enter the extrusion die 4. The smaller pitch can provide a greater thrust, so that the material can move quickly and better cooperate with the core mold 5 to form the center hole 91. The material far away from the outlet requires relatively ample space for sufficient mixing and plasticization. The larger pitch can meet this demand, so that the material has enough time and space to be stirred and evenly distributed during the transportation process, providing a uniform material foundation for the high-quality forming of the center hole 91. This pitch change design not only improves the material transportation efficiency, but also ensures the quality and uniformity of the material before extrusion, thereby providing a strong guarantee for the production of high-quality waterstops with dense and smooth center holes. In addition, the spiral conveying blade 32 near the outlet 13 has a small pitch, which makes the connection between the spiral conveying blade 32 and the rotating shaft 31 more and more firm, meeting the requirements of high extrusion thrust.

[0069] Furthermore, the feed transition section 42 has a mounting seat 6 , and the core mold 5 is detachably mounted on the mounting seat 6 .

[0070] In this embodiment, a mounting seat is provided in the feed transition section 42, which provides a clear installation position and support structure for the core mold 5. The core mold 5 is detachably provided on the mounting seat, so that when installing the core mold 5, the operator can accurately place the core mold 5 on the mounting seat 6, and fix the core mold 5 on the mounting seat 6 through simple connection methods such as bolt connection, clamping, etc. This design makes the installation process of the core mold 5 simple and quick, greatly improves the installation efficiency, shortens the debugging and preparation time of the equipment, and is conducive to improving production efficiency. When producing embedded rubber waterstops of different specifications or requirements, the appropriate core mold 5 can be quickly replaced to meet different requirements in terms of the size and shape of the center hole 91.

[0071] In the actual production process, due to the diversity of market demand or changes in product design, the core mold 5 may need to be replaced frequently. When the core mold 5 needs to be replaced, since the core mold 5 is detachably mounted on the mounting base, the operator can easily remove the original core mold 5 from the mounting base and replace it with a new core mold 5. This convenient replacement method does not require large-scale disassembly and adjustment of the entire equipment, which not only saves time and labor costs, but also reduces the damage and precision loss problems that may be caused by frequent disassembly and installation of the equipment. It improves the versatility and flexibility of production equipment, can better adapt to different production tasks and changes in market demand, and ensures the stability and controllability of the quality of the center hole. It enables manufacturers to quickly adjust production according to customer needs and produce embedded rubber waterstops with high-quality center holes 91 to meet the diverse needs of the market.

[0072] Furthermore, the mounting seat 6 has a slot 61 , and one end of the core mold 5 is used to be locked in the slot 61 .

[0073] In this embodiment, the slot 61 on the mounting seat 6 is used to clamp one end of the core mold 5, and this design provides an accurate positioning method for the core mold 5. When one end of the core mold 5 is clamped in the slot 61, the position of the core mold 5 in the extrusion channel 41 is clearly fixed, which can ensure that the core mold 5 will not be displaced or shaken during the extrusion process.

[0074] The design of the slot 61 makes the installation of the core mold 5 more stable and reliable. During the production process, the core mold 5 needs to withstand the pressure and friction of the material and other forces. By clamping the core mold 5 in the slot 61, these forces can be effectively resisted to prevent the core mold 5 from loosening or shifting during the operation. This stable installation method ensures the continuity of the production process and the stability of the center hole quality, and reduces the production error and scrap rate caused by the change of the position of the core mold 5.

[0075] Furthermore, it also includes a grinding piece 7, which is rotatably arranged at the free end of the core mold 5, and is used to grind the inner wall of the center hole 91 of the formed water stop belt 9 to be smooth.

[0076] In this embodiment, Figure 8 As shown, a grinding piece 7 is provided at the free end of the core mold 5, the main purpose of which is to improve the problem that the inner surface of the center hole 91 of the waterstop manufactured by the existing production equipment is often rougher than the outer surface. After the waterstop 9 is formed, the grinding piece 7 can timely grind the inner wall of the center hole 91, and remove the burrs, unevenness and other defects on the inner wall of the center hole 91 that may be generated during the extrusion process by mechanical grinding, so that the inner wall of the center hole 91 becomes smooth. The smooth inner wall of the center hole 91 can improve the deformation performance of the waterstop 9, reduce the risk of breakage, and increase the service life. For the compactness of the center hole 91, the smooth inner wall also helps to reduce stress concentration, making the center hole 91 more uniform when subjected to pressure and deformation, and further improving the overall quality of the center hole 91 and the reliability of the waterstop.

[0077] For the center hole 91, it is not only to improve the elastic deformation ability of the water stop 9, but also to ensure its own structural integrity and stability during use. The rough inner surface will increase the resistance and stress concentration of the water stop during the deformation process, which may easily lead to damage to the water stop, especially at the center hole 91. Polishing the inner wall of the center hole 91 by the polishing piece 7 can reduce this resistance and stress concentration, allowing the water stop 9 to deform more smoothly, thereby extending the service life of the water stop 9.

[0078] Furthermore, the grinding member 7 includes a shaft body 71, a first grinding head 72 and a second grinding head 73. The shaft body 71 is rotatably set at the free end of the core mold 5, the first grinding head 72 is set on the shaft body 71, the first grinding head 72 is a rotating body shape, and the maximum diameter of the first grinding head 72 is greater than or equal to the diameter of the core mold 5. The second grinding head 73 is set on the shaft body 71, the second grinding head 73 is located on one side of the first grinding head 72, the first grinding head 72 is located between the second grinding head 73 and the free end of the core mold 5, the second grinding head 73 is a rotating body shape, the surface roughness of the second grinding head 73 is less than that of the first grinding head 72, and the maximum diameter of the second grinding head 73 is greater than or equal to the maximum diameter of the first grinding head 72.

[0079] In this embodiment, the shaft 71 of the grinding piece 7 is rotatably arranged at the free end of the core mold 5, providing support and rotational power for the operation of the first grinding head 72 and the second grinding head 73. The rotation of the shaft 71 can be achieved by a motor or the like, so that the first grinding head 72 and the second grinding head 73 can perform rotational motion. By rotating, it can be ensured that the first grinding head 72 and the second grinding head 73 can act evenly on various parts of the inner wall of the center hole 91, thereby improving the uniformity and efficiency of the processing. In the process of processing the inner wall of the center hole 91, uniform processing can ensure the smoothness and flatness of the inner wall, avoid local roughness or unevenness, thereby improving the quality of the center hole and the overall performance of the water stop 9.

[0080] The first grinding head 72 is a rotating body and its maximum diameter is greater than or equal to the core mold diameter. This design enables the first grinding head 72 to fully cover the inner wall of the center hole 91 for grinding. When the shaft 71 drives the first grinding head to rotate, the rotating body of the first grinding head 72 can fully contact the inner wall of the center hole 91 to perform comprehensive and detailed grinding of the inner wall. Due to its large maximum diameter, it can cover the entire cross-sectional range of the center hole, ensuring that every part of the inner wall can be fully processed, thereby achieving an efficient and uniform grinding effect, and further improving the smoothness and flatness of the inner wall of the center hole 91. The smooth inner wall of the center hole 91 helps to improve the deformation performance of the waterstop, reduce the risk of leakage and stress concentration caused by the rough inner wall, and extend the service life of the waterstop 9.

[0081] The second grinding head 73 is disposed on the shaft 71 and is located on one side of the first grinding head 72 . The surface roughness of the second grinding head 73 is smaller than that of the first grinding head 72 . The second grinding head 73 is used for further fine grinding after grinding by the first grinding head 72 , so that the inner surface of the center hole 91 is smoother.

[0082] Furthermore, the free end of the core mold 5 has a mounting hole, and a driving motor is arranged in the mounting hole. The driving motor is used to drive the shaft body 71 to rotate.

[0083] In this embodiment, the driving motor realizes the function of driving the shaft 71 to rotate.

[0084] Furthermore, the core mold 5 is rotatably disposed in the extrusion channel 41 .

[0085] In this embodiment, the core mold 5 is rotatably arranged in the extrusion channel 41. During the material extrusion process, the rotation of the core mold 5 can break the static distribution state of the material during the extrusion process, so that the material is more evenly distributed around it. When the material is guided by the conical section 52 of the core mold 5 to be extruded to form the center hole 91, the rotating core mold 5 can make the material be subjected to more uniform friction and shear force in the circumferential direction, so that the material flows more smoothly and evenly in the area of ​​the center hole 91. This helps to make the density of the center hole 91 more uniform, reduce local pores or defects caused by uneven material flow, and improve the overall quality and structural stability of the center hole.

[0086] The rotation of the core mold 5 can also reduce the adhesion and friction between the material and the core mold 5, so that the material can flow and fill around the core mold more smoothly. During the forming process of the center hole 91, this low adhesion and low friction state is conducive to the uniform distribution and compaction of the material, thereby making the inner wall of the center hole 91 smoother. The smooth inner wall can reduce the stress concentration and fracture risk caused by the rough inner wall, further improve the use effect and reliability of the water stop, and extend its service life.

[0087] By improving material distribution and improving the quality of the inner wall of the center hole 91, the rotating core mold 5 can make the produced waterstop 9 have better performance and reliability. In practical applications, the waterstop 9 needs to adapt to various complex environments and deformation conditions at the joints of concrete structures. The center hole 91 with uniform quality and stable performance can better exert its elastic deformation ability and sealing effect, and improve the waterproof effect and service life of the building. Therefore, the rotation setting of the core mold 5 is of great significance to improving the overall quality and adaptability of the product. It is an important measure to optimize the production process of rubber waterstops, especially for ensuring the dense and smooth quality of the center hole 91.

[0088] Furthermore, a conical guide block is provided in the middle of the mounting seat 6, and the end of the conical guide block with a smaller diameter is close to the spiral conveyor 3. The slot 61 is located on the conical guide block, and a motor is provided in the conical guide block for driving the core mold 5 to rotate.

[0089] In this embodiment, Figure 8As shown, the end with a smaller diameter of the conical guide block in the middle of the mounting seat 6 is close to the screw conveyor 3. This design conforms to the mechanical principle of material flow and enables the material coming out of the screw conveyor 3 to flow more smoothly to the core mold 5. During the material conveying process, the conical guide block can effectively reduce the blockage and retention of materials in the feed transition section 42, so that the materials can be evenly and quickly distributed around the core mold 5, thereby improving the material conveying efficiency and uniformity. For the formation of the center hole 91, uniform material supply is an important prerequisite for ensuring its quality. The conical guide block ensures that the material can flow around the conical section 52 of the core mold 5 at a suitable speed and pressure, so that the material is more stable and uniform when it is squeezed to the surroundings to form the center hole, which helps to improve the density and shape accuracy of the center hole.

[0090] Furthermore, the cross-sectional shape of the feed transition section 42 changes gradually and smoothly from its input end to its output end, that is, changes from the shape of the outlet 13 to the shape of the input end of the pre-forming section 43 .

[0091] In this embodiment, this smooth transition is crucial for the material to move from the end with a larger diameter to the end with a smaller diameter of the extrusion cavity 11 and enter the extrusion die 4. It can ensure that the material will not have turbulence, blockage or stress concentration problems during the shape change process. In the process of the material entering the extrusion die 4 from the outlet 13 of the extrusion cavity 11, the smooth transition of the feed transition section ensures the smoothness of the material flow and reduces energy loss.

[0092] A rubber water stop production process is also proposed, using a rubber water stop production device, comprising the following steps:

[0093] S1: Add material into the feed hopper 2, and the material enters the extrusion chamber 11 through the inlet 12;

[0094] S2: The heating system in the extrusion cavity 11 heats the material and makes it plasticized. The plasticized material is pushed to move along the extrusion cavity 11 by the spiral conveyor 3. The plasticized material passes through the extrusion die 4 and is formed into a water stopper 9.

[0095] Other notes: The waterstops mentioned above are all embedded rubber waterstops.

[0096] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A rubber water stop production equipment, characterized in that: include, A machine body (1), the machine body (1) having an extrusion chamber (11), the extrusion chamber (11) having an inlet (12) and an outlet (13), a feed hopper (2), the feed hopper (2) being arranged on the machine body (1), the outlet of the feed hopper (2) being connected to the inlet (12), A screw conveying member (3), wherein the screw conveying member (3) is arranged in the extrusion cavity (11), An extrusion die (4), wherein the extrusion die (4) is arranged at the outlet (13) of the extrusion cavity (11), and the extrusion die (4) has an extrusion channel (41). A core mold (5), wherein the core mold (5) is rotatably disposed in the extrusion channel (41), one end of the core mold (5) is a free end, the free end of the core mold (5) is close to the outlet end of the extrusion channel (41), the core mold (5) is divided into a columnar section (51) and a conical section (52) from the free end to the other end, the end of the conical section (52) with a larger cross-sectional area is close to the columnar section (51), and the core mold (5) is used to form a center hole (91) of the water stop belt (9), The extrusion channel (41) is divided into a feed transition section (42), a preforming section (43), a forming transition section (44) and a forming section (45) in sequence; the preforming section (43) and the forming section (45) are both cylindrical; the cross-sectional shape of the forming section (45) is the same as the cross-sectional shape of the preforming section (43); the cross-sectional area of ​​the forming section (45) is smaller than the cross-sectional area of ​​the preforming section (43); and the two ends of the forming transition section (44) are smoothly connected to the forming section (45) and the preforming section (43), respectively. The conical section (52) is located at the pre-forming section (43) and the forming transition section (44), and the cylindrical section (51) is located at the forming section (45).

2. The rubber water stop production equipment according to claim 1, characterized in that: The cylindrical section (51) is cylindrical, and the conical section (52) is truncated cone or conical.

3. The rubber water stop production equipment according to claim 1, characterized in that: The outer wall of the core mold (5) has an annular protrusion (53), the annular protrusion (53) is close to the free end of the core mold (5), the surface of the annular protrusion (53) is smoothly connected to the side wall of the core mold (5), and the core mold (5) and the annular protrusion (53) are formed in one piece.

4. The rubber waterstop production equipment according to claim 1, characterized in that: The extrusion cavity (11) is in the shape of a truncated cone, and the outlet (13) is located at an end of the extrusion cavity (11) with a smaller diameter. The spiral conveying member (3) comprises: a rotating shaft (31), the rotating shaft (31) being rotatably disposed in the extrusion chamber (11), A spiral conveying blade (32), wherein the spiral conveying blade (32) is arranged on the rotating shaft (31), and the pitch of the spiral conveying blade (32) gradually increases from one end close to the outlet (13) to the other end.

5. The rubber water stop production equipment according to claim 4, characterized in that: The feed transition section (42) has a mounting seat (6), and the core mold (5) is detachably mounted on the mounting seat (6).

6. The rubber water stop production equipment according to claim 5, characterized in that: The mounting seat (6) is provided with a slot (61), and one end of the core mold (5) is used for being locked in the slot (61).

7. The rubber water stop production equipment according to claim 1, characterized in that: Also includes, A grinding piece (7), the grinding piece (7) being rotatably arranged at the free end of the core mold (5), the grinding piece (7) being used to grind the inner wall of the center hole (91) of the formed water stop strip (9) to make it smooth.

8. A rubber waterstop production process, using the rubber waterstop production equipment according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: adding material into the feed hopper (2), and the material enters the extrusion chamber (11) through the inlet (12); S2: The heating system in the extrusion cavity (11) heats the material and puts it into a plasticized state. The plasticized material is pushed along the extrusion cavity (11) by the spiral conveyor (3). The plasticized material passes through the extrusion die (4) and is formed into a water stopper (9).

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