A device for extruding an insulation layer of an electric wire or cable

Abstract

The application discloses a kind of electric wire cable insulation layer extruding device, including electric drive device, barrel, screw, feed hopper, heating device, cooling device and connector, electric drive device is used to drive screw rotation in barrel, connector is equipped with taper hole;It further includes: a plurality of filter screens, from blanking groove setting in barrel, filter screen bottom is equipped with arc stop block;Sleeve, sleeve is set on barrel and connector, sleeve is equipped with discharge groove;Alarm device;Conducting device, it includes arc block, cross-shaped push rod, elastic member, metal rod and two conductive blocks, arc block and metal rod are each arranged at the end of push rod, elastic member is sleeved on push rod, push rod is slidably arranged in placing groove and its one end slides in barrel, and the other end can pass out barrel wall body and abut with two conductive blocks when sliding upward;Material pipe and forming mould.In the application, when filter screen is blocked, alarm will be sent, and filter screen is conveniently replaced.

Description

Technical Field

[0001] This invention relates to the field of wire and cable production technology, and in particular to an extrusion apparatus for wire and cable insulation layers. Background Technology

[0002] Wire and cable products generally consist of conductors, insulation, shielding, armor, and sheaths. Insulation and sheathing are both extruded, a crucial process for cables. The primary extrusion material is plastic granule masterbatch. During extrusion, the masterbatch is fed into an extruder, which contains a push screw and heating device. The heating device melts the masterbatch, which is then pushed by the push screw to the extrusion head. By shaping the extrusion head die, various products are extruded, primarily used for making the insulation layer and sheath of cables. Existing extruders typically have filters at the barrel and connector connection to filter impurities added with the masterbatch. However, when impurities accumulate to a certain level, these filters are inconvenient to replace, and the equipment lacks an indicator function. This results in a consistently low amount of molten plastic flowing out, leading to many wire cores failing to be plated with insulation or having insufficient insulation thickness, resulting in deficiencies. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems by providing an extrusion device for wire and cable insulation layers.

[0004] The technical solution of this invention: A wire and cable insulation extrusion device, comprising an electric drive device, a barrel, a screw, a feed hopper, a heating device, a cooling device, and a connector. The electric drive device drives the screw to rotate inside the barrel. The barrel is provided with a feed hopper. The heating device is used to heat the barrel. The cooling device is used to cool the barrel. The connector is detachably connected to one end of the barrel. One end of the barrel is provided with a through-feed groove and a placement groove. The connector is provided with a tapered hole. The device also includes:

[0005] Several filter screens pass through the material chute and are disposed inside the material cylinder, with an arc-shaped baffle at the bottom of each filter screen;

[0006] A sleeve is fitted onto the material cylinder and the connector, one end of the sleeve is threadedly connected to the material cylinder, and the sleeve is provided with a discharge groove;

[0007] Alarm device;

[0008] The conductive device includes an arc-shaped block, a cross-shaped push rod, an elastic element, a metal rod, and two conductive blocks. The arc-shaped block and the metal rod are each disposed at one end of the push rod. The elastic element is sleeved on the push rod. The two conductive blocks are disposed on the material cylinder. The push rod is slidably disposed in the placement groove, with one end sliding inside the material cylinder and the other end sliding upward to pass through the material cylinder wall and abut against the two conductive blocks.

[0009] The material tube and the molding die are provided. The molding die is provided with a feed hole, a first through hole and a second through hole. The material tube is connected to the connector and the molding die.

[0010] Preferably, the conductive device further includes a protective box disposed on the material cylinder, which contains two conductive blocks.

[0011] Preferably, the arc-shaped stop has a square hole, the barrel has an L-shaped through groove, and the connector has a through slot, the L-shaped through groove communicating with the slot; it also includes a square insert rod that mates with the square hole.

[0012] Preferably, it also includes a push-out device disposed in the placement groove, which is linked to the push rod. When the push rod moves upward, it drives the push-out device to push the filter screens and they fall through the discharge groove.

[0013] Preferably, the ejection device includes a swing arm, a weight block, a push plate, and several buffer rods. The swing arm is rotatably connected to the side walls of the placement groove. The weight block is disposed at one end of the swing arm. Several buffer rods are provided at the bottom of the push plate. The push plate can slide up and down relative to the wall of the placement groove.

[0014] Preferably, the buffer rod includes an inner rod, an outer tube, and a buffer element, with one end of the inner rod slidably disposed inside the outer tube, and the buffer element disposed inside the outer tube.

[0015] Preferably, an elastic pad is provided on the inner wall of the sleeve.

[0016] The beneficial effects of this invention are: when the filter screen becomes clogged, an alarm will be sounded, and the filter screen is easy to replace. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0019] Figure 3 yes Figure 1 Enlarged view of a section at point B in the middle;

[0020] Figure 4 This is a schematic diagram of the feed cylinder in a preferred embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the filter screen in a preferred embodiment of the present invention;

[0022] Figure 6 This is a front view of the sleeve in a preferred embodiment of the present invention;

[0023] Figure 7 This is a cross-sectional view of the molding die in a preferred embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the connection between the pendulum and the weight-adding block in a preferred embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the connection between the push plate and the buffer rod in a preferred embodiment of the present invention;

[0026] Figure 10 This is a cross-sectional view of the buffer rod in a preferred embodiment of the present invention.

[0027] Reference numerals: 10. Electric drive device; 2. Material cylinder; 201. Material drop chute; 202. Placement chute; 203. L-shaped through chute; 3. Screw; 4. Feed hopper; 5. Heating device; 6. Cooling device; 7. Connector; 701. Tapered hole; 702. Slot; 8. Filter screen; 801. Arc-shaped stop; 801. Square hole; 801. Sleeve; 9. Discharge chute; 901. Arc-shaped block; 11. Push rod; 12. Elastic element; 13. Metal rod; 14. Conductive block; 15. Material tube; 16. Molding mold; 17. Feed hole; 171. First through hole; 172. Second through hole; 173. Protective box; 18. Square insert rod; 19. Swing rod; 20. Weighting block; 21. Push plate; 22. Buffer rod; 23. Inner rod; 231. Outer tube; 232. Buffer element; 233. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Reference Figures 1 to 10An extrusion apparatus for wire and cable insulation includes an electric drive unit 10, a barrel 2, a screw 3, a feed hopper 4, a heating unit 5, a cooling unit 6, and a connector 7. The electric drive unit 10 drives the screw 3 to rotate inside the barrel 2. The feed hopper 4 is provided on the barrel 2. The heating unit 5 is used to heat the barrel 2, and the cooling unit 6 is used to cool the barrel 2. The connector 7 is detachably connected to one end of the barrel 2. One end of the barrel 2 is provided with a through-feed groove 201 and a placement groove 202. The connector 7 is provided with a tapered hole 701. The apparatus also includes:

[0030] Several filter screens 8 pass through the material chute 201 and are installed inside the material cylinder 2. The bottom of the filter screen 8 is provided with an arc-shaped baffle 801.

[0031] Sleeve 9 is fitted onto material cylinder 2 and connector 7. One end of sleeve 9 is threaded to material cylinder 2. Sleeve 9 is provided with discharge groove 901.

[0032] Alarm device;

[0033] The conductive device includes an arc-shaped block 11, a cross-shaped push rod 12, an elastic element 13, a metal rod 14, and two conductive blocks 15. The arc-shaped block 11 and the metal rod 14 are each disposed at one end of the push rod 12. The elastic element 13 is sleeved on the push rod 12. The two conductive blocks 15 are disposed on the material cylinder 2. The push rod 12 is slidably disposed in the placement groove 202, with one end sliding inside the material cylinder 2 and the other end sliding upward to penetrate the wall of the material cylinder 2 and abut against the two conductive blocks 15.

[0034] The material pipe 16 and the molding die 17 are provided. The molding die 17 is provided with a feed hole 171, a through hole 172, and a second through hole 173. The material pipe 16 connects the connector 7 and the molding die 17. In this invention, the electric drive device 10 and the heating device 5 are working. The electric drive device 10 drives the screw 3 to rotate, adding preheated plastic granules from the feed hopper 4. The plastic granules are heated and melted in the material cylinder 2. Driven by the screw 3, they flow through several filter screens 8, through the connector 7 and the material pipe 16 into the second through hole 173 of the molding die 17. The wire core passes through the first through hole 172 and the second through hole 173. The two ends of the wire core are driven by the motor to rotate the wire drum. One wire drum takes in the wire, and the other wire drum releases the wire, thereby achieving the coating of the wire core with an insulating layer. When the added plastic granules still contain hard impurities, the impurities are intercepted by the leftmost filter screen 8. When the impurities accumulate to a certain amount or the filter screen 8 is blocked, the amount of molten plastic flowing out changes. When the arc-shaped block 11 is pushed upward by the molten plastic, the push rod 12 moves upward and squeezes the elastic element 13. The metal rod 14 contacts the two conductive blocks 15, and the alarm circuit is activated to sound an alarm. When the arc-shaped block 11 is no longer under force, the elastic element 13 gives the push rod 12 a reaction force to reset it. First, rotate the sleeve 9 so that it is not threaded to the outer wall of the material cylinder 2. Then move the sleeve 9 to the right so that the discharge chute 901 is directly below the leftmost filter screen 8. The filter screen 8 falls from the discharge chute 901, and at the same time, the molten plastic containing impurities will also flow out. Move the sleeve 9 to the left and rotate the sleeve 9 to fix it in the material cylinder 2, thereby realizing the discharge of the blocked filter screen 8. The filter screen 8 in the material cylinder 2 continues to filter the molten plastic. Specifically, the electric drive device 10 is a motor, fixed by a mounting bracket; the width of the discharge chute 901 is greater than the thickness of one filter screen 8, allowing one filter screen 8 to pass through but not two filter screens 8 at the same time; the alarm device is an electric bell; the elastic element 13 is a spring; the material cylinder 2 is provided with a sliding groove for the metal rod 14 to slide, and the sliding groove communicates with the placement groove 202; the arc-shaped stop 801 cooperates with the discharge chute 201; the heating device 5 includes several resistance heating elements, such as resistance plates; the cooling device 6 is a water tank and a base, the water tank removes excess heat generated by the shearing friction of the screw rotation to avoid excessive temperature causing plastic decomposition, scorching, or difficulty in shaping; the heating device 5 and the cooling device 6 are existing technologies and will not be described further here; the arc-shaped block 11 can increase the force-bearing area.

[0035] As a preferred embodiment of the present invention, it may also have the following additional technical features:

[0036] In this embodiment, the conductive device also includes a protective box 18 disposed on the material cylinder 2, which contains two conductive blocks 15 to prevent human electric shock.

[0037] In this embodiment, the arc-shaped stop 801 is provided with a square hole 8011, the material cylinder 2 is provided with an L-shaped through groove 203, and the connector 7 is provided with a through slot 702. The L-shaped through groove 203 communicates with the slot 702. It also includes a square insert rod 19, which cooperates with the square hole 8011. When several filter screens 8 are installed in the material cylinder 2, the square insert rod 19 passes through several square holes 8011, and several filter screens 8 are inserted into the material cylinder 2 from the discharge groove 201. The sleeve 9 is sleeved on the material cylinder 2 and the connector 7, and then the sleeve 9 is rotated to make it threadedly connected to the material cylinder 2. The inner wall of the sleeve 9 supports the arc-shaped stop 801, thereby fixing several filter screens 8. An external insert rod extends into the slot 702 and pushes the square insert rod 19 to the left until it flows out from one end of the L-shaped through groove 203.

[0038] In this embodiment, a push-out device is also provided in the placement groove 202, which is linked with the push rod 12. When the push rod 12 moves upward, it drives the push-out device to push a number of filter screens 8, which then fall through the discharge groove 901.

[0039] In this embodiment, the ejection device includes a swing rod 20, a weight block 21, a push plate 22, and several buffer rods 23. The swing rod 20 is rotatably connected to the two side walls of the placement groove 202. The weight block 21 is set at one end of the swing rod 20. Several buffer rods 23 are provided at the bottom of the push plate 22. The push plate 22 can slide up and down relative to the wall of the placement groove 202. The push rod 12 moves upward, causing the swing rod 20 to swing. One end of the swing rod 20 abuts against the push plate 22, giving the push plate 22 a downward force. When the discharge groove 901 is below the filter screen 8, the buffer rods 23 give the filter screen 8 a downward pushing force, causing it to fall. This avoids the situation where the filter screens 8 are difficult to fall due to the stickiness of the molten plastic between them or between the filter screen 8 and the wall of the discharge groove 201. Specifically, one end of the buffer rod 23 passes through the wall of the discharge trough 201 and abuts against the filter screen 8. The top of the filter screen 8 is provided with an insertion hole that matches the buffer rod 23 to prevent the filter screen 8 from tilting. Two sliding grooves are provided on both sides of the discharge trough 201, and sliding rods that match the sliding grooves are provided on both sides of the push plate 22. Round rods are provided on both sides of the swing rod 20, and the round rods are rotatably connected to the wall of the placement trough 202.

[0040] In this embodiment, the buffer rod 23 includes an inner rod 231, an outer tube 232, and a buffer element 233. One end of the inner rod 231 is slidably disposed inside the outer tube 232, and the buffer element 233 is disposed inside the outer tube 232. Specifically, the outer tube 232 is disposed on the push plate 22. The push plate 22 moves downward, causing the outer tube 232 to move downward and press against the buffer element 233. When the discharge chute 901 is below the filter screen 8, the buffer element 233 exerts a force on the inner rod 231, causing it to slide downward, thereby pushing out the filter screen 8. The inner rod 231 is adapted to the insertion hole at the top of the filter screen 8. The buffer element 233 is a spring.

[0041] In this embodiment, an elastic pad is provided on the inner wall of the sleeve 9 so that the sleeve 9 and the material cylinder 2 fit tightly together.

[0042] It should be noted that 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 a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extrusion apparatus for wire and cable insulation, comprising an electric drive device (10), a barrel (2), a screw (3), a feed hopper (4), a heating device (5), a cooling device (6), and a connector (7), wherein the electric drive device (10) drives the screw (3) to rotate within the barrel (2), the feed hopper (4) is provided on the barrel (2), the heating device (5) heats the barrel (2), the cooling device (6) cools the barrel (2), and the connector (7) is detachably connected to one end of the barrel (2), characterized in that, The material cylinder (2) has a through-feed groove (201) and a placement groove (202) at one end, and the connector (7) has a tapered hole (701); it also includes: Several filter screens (8) pass through the feed chute (201) and are disposed inside the feed cylinder (2). The bottom of the filter screen (8) is provided with an arc-shaped stop (801), and the arc-shaped stop (801) is provided with a square hole (8011). The feed cylinder (2) is provided with an L-shaped through groove (203), and the connector (7) is provided with a through slot (702). The L-shaped through groove (203) communicates with the slot (702). A sleeve (9) is fitted onto the material cylinder (2) and the connector (7). One end of the sleeve (9) is threadedly connected to the material cylinder (2). The sleeve (9) is provided with a discharge groove (901). Alarm device; The conductive device includes an arc-shaped block (11), a cross-shaped push rod (12), an elastic element (13), a metal rod (14), and two conductive blocks (15). The arc-shaped block (11) and the metal rod (14) are each disposed at one end of the push rod (12). The elastic element (13) is sleeved on the push rod (12). The two conductive blocks (15) are disposed on the material cylinder (2). The push rod (12) is slidably disposed in the placement groove (202) and one end of it can slide in the material cylinder (2). When the other end slides upward, it can pass through the wall of the material cylinder (2) and abut against the two conductive blocks (15). The material tube (16) and the molding die (17) are provided with a feed hole (171), a through hole (172) and a second through hole (173). The material tube (16) connects the connector (7) and the molding die (17). A square insert (19) mates with the square hole (8011); The ejection device installed in the placement slot (202) is linked with the push rod (12). When the push rod (12) moves upward, it drives the ejection device to push several filter screens (8) and they fall through the discharge slot (901). The ejection device includes a swing rod (20), a weight block (21), a push plate (22), and several buffer rods (23). The swing rod (20) is rotatably connected to the two side walls of the placement slot (202). (21) A plurality of buffer rods (23) are provided at the bottom of the push plate (22) and the push plate (22) can slide up and down relative to the wall of the placement groove (202). The buffer rod (23) includes an inner rod (231), an outer tube (232) and a buffer element (233). One end of the inner rod (231) is slidably disposed in the outer tube (232), and the buffer element (233) is disposed in the outer tube (232).

2. The extrusion apparatus for wire and cable insulation layer according to claim 1, characterized in that: The conductive device also includes a protective box (18) disposed on the material cylinder (2), which contains two conductive blocks (15).

3. The extrusion apparatus for wire and cable insulation layer according to claim 1, characterized in that: An elastic pad is provided on the inner wall of the sleeve (9).

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