A handrail with steel wire reinforcement extrusion mechanism

Abstract

This utility model discloses an extrusion mechanism for a steel wire reinforcement layer on a handrail, including an extrusion die and a cooling water tank. The extrusion die has an internal cavity. Multiple positioning tubes are equidistantly fixed along one side of the cavity, while a cavity communicating with the cavity is located on the other side. Steel wires are movably inserted into the positioning tubes, and the wires transversely penetrate the cavity and the mold cavity, their surfaces covered with a rubber layer to form a reinforcement layer. This reinforcement layer transversely penetrates the cooling water tank. In this utility model, the reinforcement layer is supported by a continuous conveyor belt in the cooling water tank, ensuring uniform support. Simultaneously, the upper surface of the conveyor belt is supported by belt shaping rollers to form a U-shaped trough structure, which collects water sprayed above to immerse the reinforcement layer, improving contact heat exchange and allowing for simultaneous cooling during transport. This ensures the rubber layer remains consistently positioned on the steel wire surface, improving stress uniformity during use and ultimately enhancing product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of handrail belt production equipment, specifically a handrail belt steel wire reinforcement layer extrusion mechanism. Background Technology

[0002] The reinforcing layer of the escalator handrail is a rubber layer with embedded steel wires. Through a co-extrusion process, the rubber is extruded and wrapped around the steel wires, making them a single integrated structure and enhancing the structural strength of the handrail. During extrusion production, multiple steel wires are clamped together by the same fixture and pulled at the same speed as the rubber extrusion by a traction device. The reinforcing layer then passes through a cooling water tank to improve stability.

[0003] Existing cooling water tanks typically immerse the reinforcing layer directly in water or support it with intermittently placed support rollers, lacking overall uniform support measures. Because the reinforcing rubber, freshly extruded from the die, is not fully set, the bond strength between the rubber layer and the steel wire is insufficient. During the reinforcing layer's transport, the traction force is applied only to the steel wire. Due to the high density of the rubber layer, the reinforcing layer, under its own weight, easily shifts downwards on the steel wire surface, leading to misalignment between the two. This ultimately affects the uniformity of stress on the reinforcing layer during use, indicating a deficiency in its design. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a handrail belt steel wire reinforcement layer extrusion mechanism, which solves the problem that when the reinforcement layer rubber is not fully shaped after being extruded from the extrusion die, the lack of overall uniform support measures easily causes the incompletely shaped rubber layer to shift downward on the steel wire surface, resulting in misalignment between the two.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An extrusion mechanism for a handrail with a steel wire reinforcement layer includes an extrusion die and a cooling water tank. The extrusion die has a cavity inside. Multiple positioning tubes are fixed longitudinally at equal intervals on one side of the cavity. A cavity communicating with the cavity is provided on the other side of the extrusion die. A steel wire is movably inserted into the positioning tube. The steel wire passes through the cavity and the cavity laterally and is wrapped with a rubber layer to form a reinforcement layer. The reinforcement layer passes through the cooling water tank laterally.

[0007] The cooling water tank has drive rollers located near both ends inside. Multiple dumbbell-shaped belt shaping rollers are also installed at equal intervals between the two drive rollers inside the cooling water tank. A conveyor belt drives between the two drive rollers. The upper surface of the conveyor belt is supported below the reinforcing layer. The belt shaping rollers are supported below the upper surface of the conveyor belt. Drainage holes are evenly distributed on the surface of the conveyor belt. A spray pipe is installed on the top of the inner wall of the cooling water tank at the position corresponding to the reinforcing layer.

[0008] Preferably, the top of the inner wall of the cavity is provided with transverse drawing ridges at equal intervals along the longitudinal direction, and the upper surface of the reinforcing layer is provided with drawing grooves corresponding to the drawing ridges.

[0009] Preferably, a primary extrusion cavity, a buffer cavity, and a secondary extrusion cavity are sequentially arranged between the mold cavity and the forming cavity.

[0010] Preferably, the inner wall of the mold cavity corresponding to the positioning tube is provided with a guide protrusion protruding into the mold cavity along the longitudinal direction, and the top and bottom of the extrusion mold are provided with inlets corresponding to the positions of the guide protrusions.

[0011] Preferably, the cooling water tank has multiple idler rollers equidistantly arranged inside the tank below the lower surface of the conveyor belt, and a tensioning roller is also provided inside the cooling water tank, supporting the lower surface of the conveyor belt between the drive roller and the idler rollers.

[0012] Preferably, the height of the conveyor belt edge at the position corresponding to the belt shaping roller is higher than the height of the plane containing the upper surface of the reinforcing layer.

[0013] Preferably, one end of the positioning tube corresponding to the cavity is bullet-shaped.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention uses a continuous conveyor belt to support the reinforcing layer in a cooling water tank, ensuring uniform support. Simultaneously, the upper surface of the conveyor belt is supported by a belt-setting roller, forming a U-shaped trough structure that collects water sprayed from above to immerse the reinforcing layer, improving contact heat exchange and allowing for simultaneous cooling during transport. This ensures the rubber layer remains consistently positioned on the steel wire surface, improving stress uniformity during use and ultimately enhancing product quality. It solves the problem of existing reinforcing layers, where the rubber is not fully set after extrusion and lacks uniform support, easily causing the incompletely set rubber layer to shift downwards on the steel wire surface, leading to misalignment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2This is a schematic diagram of the internal structure of the extrusion die of this utility model;

[0018] Figure 3 This is a top view of the internal structure of the extrusion die of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the cooling water tank of this utility model;

[0020] Figure 5 This is a partial structural diagram of the corresponding positions of the transmission roller and the belt shaping roller of this utility model;

[0021] Figure 6 This is a partial side view of the structure of the belt shaping roller of this utility model.

[0022] In the diagram: 1. Extrusion die; 101. Die cavity; 102. Cavity; 103. Wire drawing protrusion; 104. Primary extrusion chamber; 105. Buffer chamber; 106. Secondary extrusion chamber; 107. Guide protrusion; 108. Feed inlet; 2. Cooling water tank; 3. Positioning tube; 4. Steel wire; 5. Reinforcing layer; 501. Wire drawing groove; 6. Drive roller; 7. Belt shaping roller; 8. Conveyor belt; 801. Drain hole; 9. Spray pipe; 10. Idler roller; 11. Tensioning roller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-6 As shown, this utility model provides a technical solution: a handrail with steel wire reinforcement extrusion mechanism, including an extrusion mold 1 and a cooling water tank 2. The extrusion mold 1 is provided with a mold cavity 101. On one side of the mold cavity 101, multiple positioning tubes 3 are fixed longitudinally at equal intervals. One end of the positioning tubes 3 corresponding to the cavity 102 is bullet-shaped. On the other side of the extrusion mold 1, a cavity 102 connected to the mold cavity 101 is provided. Between the mold cavity 101 and the cavity 102, a primary extrusion cavity 104, a buffer cavity 105 and a secondary extrusion cavity 106 are also arranged in sequence.

[0025] The inner wall of the mold cavity 101 corresponding to the positioning tube 3 is provided with a guide protrusion 107 protruding into the mold cavity 101 along the longitudinal direction. The top and bottom of the extrusion mold 1 are provided with a feed port 108 corresponding to the position of the guide protrusion 107. The top of the inner wall of the cavity 102 is provided with transverse drawing ribs 103 at equal intervals along the longitudinal direction. The upper surface of the reinforcing layer 5 is provided with a drawing groove 501 corresponding to the drawing ribs 103.

[0026] A steel wire 4 is movably inserted into the positioning tube 3. The steel wire 4 passes through the mold cavity 101 and the mold cavity 102 laterally, and the surface is wrapped with a rubber layer to form a reinforcing layer 5. The reinforcing layer 5 passes through the cooling water tank 2 laterally. A transmission roller 6 is set at the position near both ends inside the cooling water tank 2. Multiple dumbbell-shaped belt shaping rollers 7 are also installed at equal intervals between the two transmission rollers 6 inside the cooling water tank 2.

[0027] A conveyor belt 8 is driven between two drive rollers 6. Drainage holes 801 are evenly arranged on the surface of the conveyor belt 8. A spray pipe 9 is installed on the top of the inner wall of the cooling water tank 2 at the position corresponding to the reinforcing layer 5. The upper surface of the conveyor belt 8 is supported below the reinforcing layer 5. The belt shaping roller 7 is supported below the upper surface of the conveyor belt 8. The height of the edge of the conveyor belt 8 at the position corresponding to the belt shaping roller 7 is higher than the height of the plane where the upper surface of the reinforcing layer 5 is located. Multiple idler rollers 10 are evenly arranged inside the cooling water tank 2 below the lower surface of the conveyor belt 8. A tension roller 11 is also provided inside the cooling water tank 2, which is supported above the lower surface of the conveyor belt 8 between the drive rollers 6 and the idler rollers 10.

[0028] Working principle:

[0029] Multiple steel wires 4 are clamped by the same clamp and pulled by a traction device at the same speed as the rubber extrusion speed. The rubber is extruded through the extrusion die 1 to form a reinforcing layer 5 structure. The wire drawing groove 501 corresponds to the inner side of the reinforcing layer 5 after it is bent into a C-shape. By setting the wire drawing groove 501, the internal bending pressure can be reduced during bending, making bending and shaping easier. The reinforcing layer 5 passes through the cooling water tank 2 laterally and is supported and transported as a whole by the conveyor belt 8. This prevents the surface rubber layer of the reinforcing layer 5 from shifting downward due to gravity when it is not fully cured and shaped. During the conveying of the reinforcing layer 5, the conveyor belt 8, supported by the belt shaping roller 7 and having a U-shaped groove structure on its upper surface, can collect the sprayed water above, improving the heat exchange effect with the reinforcing layer 5. The shaping is completed during the traction and conveying of the reinforcing layer 5. The clamp, traction device and cooling water tank 2 water circulation cooling components are the same as those in the prior art and are not part of the technical features of this patent, so they will not be described here.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A handrail belt wire reinforcement layer extrusion mechanism comprising an extrusion die (1) and a cooling water tank (2), characterized in that: The extrusion mold (1) has a cavity (101) inside. On one side of the cavity (101) of the extrusion mold (1), multiple positioning tubes (3) are fixed at equal intervals along the longitudinal direction. On the other side of the extrusion mold (1), a cavity (102) connected to the cavity (101) is provided. A steel wire (4) is movably inserted into the positioning tube (3). The steel wire (4) passes through the cavity (101) and the cavity (102) laterally and is wrapped with a rubber layer to form a reinforcing layer (5). The reinforcing layer (5) passes through the cooling water tank (2) laterally. Inside the cooling water tank (2), there are drive rollers (6) near both ends. Inside the cooling water tank (2), there are also multiple dumbbell-shaped belt shaping rollers (7) installed at equal intervals between the two drive rollers (6). A conveyor belt (8) is driven between the two drive rollers (6). The upper surface of the conveyor belt (8) is supported below the reinforcing layer (5). The belt shaping rollers (7) are supported below the upper surface of the conveyor belt (8). Drainage holes (801) are evenly arranged on the surface of the conveyor belt (8). A spray pipe (9) is installed on the top of the inner wall of the cooling water tank (2) at the position corresponding to the reinforcing layer (5).

2. A handrail wire reinforcement layer extrusion mechanism according to claim 1, characterized in that: The top of the inner wall of the cavity (102) is provided with transverse drawing ridges (103) at equal intervals along the longitudinal direction, and the upper surface of the reinforcing layer (5) is provided with drawing grooves (501) corresponding to the drawing ridges (103).

3. A handrail wire reinforcement layer extrusion mechanism according to claim 1, characterized in that: A primary extrusion chamber (104), a buffer chamber (105), and a secondary extrusion chamber (106) are sequentially arranged between the mold cavity (101) and the shaped cavity (102).

4. A handrail wire reinforcement layer extrusion mechanism according to claim 1, characterized in that: The inner wall of the mold cavity (101) corresponding to the positioning tube (3) is provided with a guide protrusion (107) protruding into the mold cavity (101) along the longitudinal direction. The top and bottom of the extrusion mold (1) are provided with feed inlets (108) corresponding to the positions of the guide protrusion (107).

5. A handrail wire reinforcement layer extrusion mechanism according to claim 1, characterized in that: The cooling water tank (2) is provided with multiple idlers (10) arranged at equal intervals below the lower surface of the conveyor belt (8). The cooling water tank (2) is also provided with a tensioning roller (11) that is supported above the lower surface of the conveyor belt (8) between the drive roller (6) and the idlers (10).

6. A handrail wire reinforcement layer extrusion mechanism according to claim 1, characterized in that: The height of the edge of the conveyor belt (8) corresponding to the belt shaping roller (7) is higher than the height of the plane on the upper surface of the reinforcing layer (5).

7. A handrail wire reinforcement layer extrusion mechanism according to claim 1, characterized in that: The positioning tube (3) is bullet-shaped at one end corresponding to the cavity (102).

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