Elevator cable extrusion structure

Abstract

The invention relates to the field of wires and cables, and discloses an elevator cable extrusion structure which comprises an extrusion machine head and an extrusion die, the extrusion machine head comprises a rectangular blocky machine head body, a die mounting hole penetrating front and back is formed in the middle of the machine head body, and the extrusion die is mounted in the die mounting hole; limiting plates are connected to the front end and the rear end of the machine head body and used for limiting the extrusion die, an upper runner and a lower runner are arranged in the machine head body on the upper side and the lower side of the die mounting hole correspondingly, and strip-shaped glue injection holes communicating with the die mounting hole are formed in the front end of the upper runner and the front end of the lower runner correspondingly, and a machine head flange is connected to the left end of the machine head body. A hemispherical groove-shaped first flow channel is arranged in the machine head flange, a second flow channel and a fifth flow channel which are communicated with the first flow channel are symmetrically arranged in the machine head body up and down, the second flow channel and the fifth flow channel are communicated with the upper flow channel, and the fifth flow channel is communicated with the lower flow channel. The problem that in the prior art, elevator cable sheaths are extruded unevenly can be solved.

Description

Technical Field

[0001] The invention relates to the field of electric wires and cables, and in particular to an elevator cable extrusion structure. Background Art

[0002] As a key component in the elevator system, the quality and performance of elevator cables are directly related to the safety and reliability of the elevator. As an important component of the cable, the elevator cable sheath mainly insulates and protects the internal conductor of the cable. The extrusion quality of the sheath directly affects the wear resistance, weather resistance and service life of the cable. However, in the actual production process, the extrusion of the elevator cable sheath often has uneven problems, which not only affects the appearance quality of the cable, but also may cause the performance of the cable to deteriorate or even fail during use. Summary of the invention

[0003] The present invention aims to provide an elevator cable extrusion structure to improve the problem of uneven extrusion of elevator cable sheath in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an elevator cable extrusion structure, including an extrusion head and an extrusion die, the extrusion head including a rectangular block-shaped head body, a mold mounting hole penetrating front and back is provided in the middle of the head body, the extrusion die is installed in the mold mounting hole, and the front and rear ends of the head body are connected to limit plates for limiting the extrusion die, and upper and lower flow channels are respectively provided in the head body on the upper and lower sides of the mold mounting hole, and the front ends of the upper and lower flow channels are provided with strip-shaped injection holes connected to the mold mounting hole. The left end of the head body is connected to a head flange, and a first flow channel in the shape of a hemispherical groove is provided in the head flange. A second flow channel and a fifth flow channel connected to the first flow channel are symmetrically provided at the upper and lower parts of the head body, and the second flow channel and the fifth flow channel are connected to the upper flow channel, and the fifth flow channel is connected to the lower flow channel.

[0005] Preferably, as an improvement, the second flow channel and the fifth flow channel are symmetrically distributed about the horizontal axis of the first flow channel.

[0006] Preferably, as an improvement, the upper flow channel and the lower flow channel are opened at the upper and lower ends of the head body respectively, and baffles are connected to the upper and lower ends of the head body, and the baffles are used to close the openings of the upper flow channel and the lower flow channel.

[0007] Preferably, as an improvement, the upper flow channel includes a third flow channel, a fourth flow channel and a diverter cavity inclined from the left front side to the right rear side of the head body, the third flow channel and the fourth flow channel are distributed in an eight-shaped shape, the front ends of the third flow channel and the fourth flow channel are connected to the injection hole, the rear ends of the third flow channel and the fourth flow channel are connected to the right front section of the diverter cavity, and a mountain-shaped partition is provided between the third flow channel and the fourth flow channel, and the surface of the mountain-shaped partition is an arc surface.

[0008] Preferably, as an improvement, the structure of the lower flow channel is the same as that of the upper flow channel, and the lower flow channel includes a sixth flow channel, a seventh flow channel and a diversion cavity.

[0009] Preferably, as an improvement, the second flow channel and the fifth flow channel are connected to the left ends of the diversion chambers of the upper flow channel and the lower flow channel respectively.

[0010] Preferably, as an improvement, a plurality of electric heating rods are evenly buried in the head body outside the upper flow channel, the lower flow channel and the mold mounting hole, and a heating power supply connected to the electric heating rods is provided at the right end of the head body.

[0011] Preferably, as an improvement, the extrusion mold includes an inner mold and an outer mold, the middle part of the front end of the inner mold protrudes forward to form a mountain-shaped boss, a plurality of conductor holes that penetrate the inner mold front and back are arranged side by side in the middle of the mountain-shaped boss, a mountain-shaped groove is arranged in the middle of the rear end of the outer mold, the size of the mountain-shaped groove is larger than the mountain-shaped boss, an extrusion molding hole connected to the mountain-shaped groove is arranged at the front end of the outer mold, the mountain-shaped groove is opened on the upper and lower sides of the rear end of the outer mold to form a glue inlet, and after the extrusion mold is installed in the mold mounting hole, the glue inlet is connected to the glue injection hole.

[0012] Preferably, as an improvement, the width of the glue inlet is less than or equal to the width of the glue injection hole.

[0013] The principle and advantages of this scheme are: in actual application, the outer mold of the extrusion mold is buckled on the front end of the inner mold, and a conical annular extrusion flow channel is formed between the mountain-shaped groove and the mountain-shaped boss. The extrusion mold is installed in the mold installation hole and is limited and fixed by the limit plates on the front and rear sides of the head body to prevent glue leakage at the front and rear ends of the head body. After installation, the glue inlet is aligned and connected with the glue injection hole on the head body. The extrusion head is installed on the extruder, and the heated and melted insulating material enters from the first flow channel of the head flange, and the material is accumulated through the hemispherical groove-shaped structure. By designing the second flow channel and the fifth flow channel symmetrically, combined with the hemispherical structure of the first flow channel, it is ensured that the insulating material enters the second flow channel and the fifth flow channel in equal amounts and at equal speeds. Then the insulating material is first accumulated in the shunt cavity of the upper and lower flow channels. The shunt cavity is set in an inclined manner to ensure that the insulating material accumulates to the rear side after entering, and will enter the third flow channel, the fourth flow channel or the sixth flow channel, and the seventh flow channel on the front side only after filling the shunt cavity. The mountain-shaped partition divides the insulating material in the shunt cavity into the third flow channel, the fourth flow channel, the sixth flow channel, and the seventh flow channel. The third and fourth flow channels distributed in an eight-shaped shape make the insulating material evenly distributed in the injection hole and maintain a relatively uniform flow rate to enter the glue inlet of the extrusion mold. The lower flow channel is the same as the upper flow channel, so that the insulating material enters the extrusion flow channel evenly from the glue inlet on both sides, and enters the extrusion molding hole under the guidance of the mountain-shaped boss and the mountain-shaped groove, and is evenly coated on the outside of the conductor to extrude the elevator flat cable. The upper and lower flow channels adopt an open structure, and the opening is closed by a baffle, which is convenient for maintenance and management of the upper and lower flow channels. The electric heating rod in the head body generates heat by energizing the heating power supply to ensure that the insulating material maintains good fluidity during the extrusion process. The present invention ensures that the insulating material can be evenly coated on the outside of the conductor during the extrusion process through a new design of the flow channel, and the texture of the formed elevator cable sheath is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an extruder head according to an embodiment of the present invention.

[0015] Figure 2 It is a longitudinal sectional view of the extruder head according to an embodiment of the present invention.

[0016] Figure 3 It is a cross-sectional view of the flow channel on the extruder head of an embodiment of the present invention.

[0017] Figure 4 It is a top cross-sectional view of the extrusion die according to an embodiment of the present invention.

[0018] Figure 5 It is a bottom sectional view of the inner mold according to an embodiment of the present invention.

[0019] Figure 6 It is a side sectional view of the inner mold of an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The figure marks in the drawings of the specification include: head flange 1, first flow channel 2, second flow channel 3, baffle 4, third flow channel 5, mold mounting hole 6, mountain-shaped partition 7, fourth flow channel 8, head body 9, heating power supply 10, seventh flow channel 11, sixth flow channel 12, fifth flow channel 13, limit plate 14, diversion cavity 15, glue injection hole 16, inner mold 18, conductor hole 19, mountain-shaped boss 20, outer mold 21, extrusion molding hole 22, mountain-shaped groove 23.

[0022] The embodiment is basically as shown in the attached Figure 1 As shown: an elevator cable extrusion structure, including an extruder head and an extruder die, the extruder head includes a rectangular block-shaped head body 9, the middle of the head body 9 is provided with a die mounting hole 6 that runs through the front and back, and the extruder die is installed in the die mounting hole 6. Figure 4 As shown, the extrusion die includes an inner die 18 and an outer die 21. The middle of the front end of the inner die 18 protrudes forward to form a mountain-shaped boss 20. Figure 5 , Figure 6 As shown, the upper and lower side walls of the mountain-shaped boss 20 have an inclination angle of 113°, and the left and right side walls have an inclination angle of 106°. Three conductor holes 19 are arranged side by side in the middle of the mountain-shaped boss 20 and penetrate the inner mold 18 from front to back. A mountain-shaped groove 23 is arranged in the middle of the rear end of the outer mold 21. The size of the mountain-shaped groove 23 is larger than that of the mountain-shaped boss 20. An extrusion molding hole 22 connected to the mountain-shaped groove 23 is arranged at the front end of the outer mold 21. The mountain-shaped groove 23 is opened on both sides of the upper and lower sides of the rear end of the outer mold 21 to form a glue inlet. Figure 2 , Figure 3As shown, the front and rear ends of the head body 9 are bolted to limit plates 14 for limiting the extrusion die. The head body 9 is provided with an upper flow channel and a lower flow channel on the upper and lower sides of the die mounting hole 6, respectively. The left end of the head body 9 is bolted to a head flange 1, and a first flow channel 2 in the shape of a hemispherical groove is provided in the head flange 1. The head body 9 is symmetrically provided with a second flow channel 3 and a fifth flow channel 13 connected to the first flow channel 2, and the second flow channel 3 and the fifth flow channel 13 are symmetrically distributed about the horizontal axis of the first flow channel 2. The front ends of the upper and lower flow channels are provided with strip-shaped injection holes 16 connected to the die mounting hole 6. After the extrusion die is installed in the die mounting hole 6, the glue inlet is connected to the injection hole 16, and the width of the glue inlet is less than or equal to the width of the injection hole 16. The upper and lower flow channels are opened at the upper and lower ends of the head body 9, respectively. The upper and lower ends of the head body 9 are connected to baffles 4, and the baffles 4 are used to close the openings of the upper and lower flow channels. The upper flow channel includes the third flow channel 5, the fourth flow channel 8 and the diverter cavity 15 inclined from the left front side to the right rear side of the head body 9, the third flow channel 5 and the fourth flow channel 8 are distributed in an eight-shaped shape, the front ends of the third flow channel 5 and the fourth flow channel 8 are connected to the injection hole 16, the rear ends of the third flow channel 5 and the fourth flow channel 8 are connected to the right front section of the diverter cavity 15, and a mountain-shaped partition 7 is provided between the third flow channel 5 and the fourth flow channel 8, and the surface of the mountain-shaped partition 7 is an arc surface. The structure of the lower flow channel is the same as that of the upper flow channel, and the lower flow channel includes the sixth flow channel 12, the seventh flow channel 11 and the diverter cavity 15, and the second flow channel 3 and the fifth flow channel 13 are respectively connected to the left ends of the diverter cavity 15 of the upper flow channel and the lower flow channel.

[0023] Six electric heating rods are evenly buried in the head body 9 outside the upper flow channel, the lower flow channel and the mold installation hole 6, and a heating power supply 10 connected to the electric heating rods is provided at the right end of the head body 9.

[0024] The specific implementation process is as follows: before use, combine the inner mold 18 and the outer mold 21. The outer contours of the inner mold 18 and the outer mold 21 are rectangles of the same size, and the corresponding mold mounting holes 6 are also rectangular holes. The inner mold 18 and the outer mold 21 are sequentially installed in the mold mounting holes 6 of the head body 9, and the inner mold 18 and the outer mold 21 are limited by the limiting plate 14. After installation, the glue inlet of the extrusion mold is aligned and connected with the glue injection hole 16 inside the head body 9. A through hole corresponding to the conductor hole 19 is provided on the limiting plate 14 located on the rear side of the head body 9 to facilitate the insertion of the conductor. The upper and lower ends of the head body 9 are connected by bolts to the baffle 4 to close the upper and lower flow channels to prevent glue leakage. Then install the extrusion head equipped with the extrusion mold on the extruder. In the process of extruding the elevator cable through the extruder, the head body 9 is heated by the heating power supply 10 and the electric heating rod, and the insulating material is melted in the extruder and squeezed into the first flow channel 2. In the first flow channel 2 with a hemispherical groove, it is divided for the first time to enter the second flow channel 3 and the fifth flow channel 13. The symmetrically arranged second flow channel 3 and the fifth flow channel 13 make the entry amount and entry speed of the insulating material equivalent. The insulating material enters the upper flow channel and the lower flow channel from the second flow channel 3 and the fifth flow channel 13. The upper flow channel and the lower flow channel have the same structure. Here, only the upper flow channel is used as an example. The insulating material enters the diversion cavity 15 of the upper flow channel from the second flow channel 3, flows backward along the inclined diversion cavity 15, and then gradually accumulates and enters the third flow channel 5 and the fourth flow channel 8. The structure of the diversion cavity 15 and the mountain-shaped partition 7 make the insulating material evenly divided into two parts and enter the third flow channel 5 and the fourth flow channel 8, and then evenly distributed along the length direction at the injection hole 16 to enter the glue inlet of the extrusion mold. The flow process of the insulating material in the lower flow channel is the same as that in the upper flow channel, and then the insulating material enters the extrusion die evenly from the upper and lower glue inlets. In the extrusion die, the insulating material enters equally from the upper and lower sides at the same time, fills the extrusion flow channel between the mountain-shaped groove 23 and the mountain-shaped boss 20 and wraps around the outside of the conductor, and then is extruded from the extrusion molding hole 22 to form an elevator cable.

[0025] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An elevator cable extrusion structure, characterized in that: The extruder head comprises an extrusion die, wherein the extruder head comprises a rectangular block-shaped head body, a die mounting hole which runs through the front and rear is arranged in the middle of the head body, the extrusion die is installed in the die mounting hole, limit plates are connected to the front and rear ends of the head body for limiting the extrusion die, upper flow channels and lower flow channels are respectively arranged in the head body on the upper and lower sides of the die mounting hole, strip-shaped injection holes which are connected to the die mounting hole are arranged at the front ends of the upper and lower flow channels, a head flange is connected to the left end of the head body, a first flow channel which is in the shape of a hemispherical groove is arranged in the head flange, a second flow channel and a fifth flow channel which are connected to the first flow channel are symmetrically arranged at the upper and lower parts of the head body, the second flow channel is connected to the upper flow channel, and the fifth flow channel is connected to the lower flow channel.

2. The elevator cable extrusion structure according to claim 1, characterized in that: The second flow channel and the fifth flow channel are symmetrically distributed about the horizontal axis of the first flow channel.

3. The elevator cable extrusion structure according to claim 1, characterized in that: The upper flow channel and the lower flow channel are opened at the upper and lower ends of the machine head body respectively, and the upper and lower ends of the machine head body are connected with baffles, which are used to close the openings of the upper flow channel and the lower flow channel.

4. The elevator cable extrusion structure according to claim 1, characterized in that: The upper flow channel includes a third flow channel, a fourth flow channel and a diversion cavity inclined from the left front side to the right rear side of the nose body. The third flow channel and the fourth flow channel are distributed in an eight-shaped shape. The front ends of the third flow channel and the fourth flow channel are connected with the injection hole, and the rear ends of the third flow channel and the fourth flow channel are connected with the right front section of the diversion cavity. A mountain-shaped partition is provided between the third flow channel and the fourth flow channel, and the surface of the mountain-shaped partition is an arc surface.

5. The elevator cable extrusion structure according to claim 4, characterized in that: The structure of the lower flow channel is the same as that of the upper flow channel, and the lower flow channel includes a sixth flow channel, a seventh flow channel and a diversion cavity.

6. The elevator cable extrusion structure according to claim 5, characterized in that: The second flow channel and the fifth flow channel are respectively communicated with the left ends of the flow diversion cavities of the upper flow channel and the lower flow channel.

7. An elevator cable extrusion structure according to claim 6, characterized in that: A plurality of electric heating rods are evenly buried in the head body outside the upper flow channel, the lower flow channel and the mold installation hole, and a heating power source connected to the electric heating rods is provided at the right end of the head body.

8. The elevator cable extrusion structure according to claim 1, characterized in that: The extrusion mold comprises an inner mold and an outer mold. The middle part of the front end of the inner mold protrudes forward to form a mountain-shaped boss. A plurality of conductor holes that penetrate the inner mold front and back are arranged side by side in the middle part of the mountain-shaped boss. A mountain-shaped groove is arranged in the middle part of the rear end of the outer mold. The size of the mountain-shaped groove is larger than the mountain-shaped boss. An extrusion molding hole connected to the mountain-shaped groove is arranged at the front end of the outer mold. The mountain-shaped groove is opened on the upper and lower sides of the rear end of the outer mold to form a glue inlet. After the extrusion mold is installed in the mold mounting hole, the glue inlet is connected to the glue injection hole.

9. The elevator cable extrusion structure according to claim 8, characterized in that: The width of the glue inlet is less than or equal to the width of the glue injection hole.

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