Plastic shell injection molding extrusion device

Abstract

The utility model relates to the technical field of wires and cables, in particular to a plastic shell injection molding extrusion device which comprises a screw extruder, a support frame is fixedly mounted at one end of the screw extruder, a mounting cylinder is fixedly mounted at the top of the support frame, and a mold core cylinder is fixed in the middle of one end of the mounting cylinder. A feeding cylinder is attached to the outer wall of one end of the mounting cylinder and the outer wall of the mold core cylinder, a communicating hole is formed in the middle of the feeding cylinder, a material guiding cavity is formed in the gap between the inner wall of the communicating hole and the outer wall of the mold core cylinder, and a material guiding pipe is fixedly mounted at the top of the material guiding cavity and the discharging end of the screw extruder. According to the utility model, the stable performance of wires and cables during operation is ensured, the problem that the wires and cables are not easy to wrap due to solidification of molten materials of a plastic shell during material guiding can be avoided, the plastic shell at the initial stage of extrusion can be cooled, and the problem that the plastic shell is deformed due to different internal and external pressure intensities at the moment of extrusion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wire and cable, in particular to a plastic shell injection and extrusion device. Background Technique

[0002] The wire and cable screw extruder is an indispensable device in the production process of wires and cables. Through steps such as plasticization, extrusion, cooling, and coiling, plastic billets are transformed into continuous thin wires or tubular materials. The key components of the extruder include a feeding system, a plasticization system, an extrusion system, a cooling system, a coiling system, etc., and are widely used in fields such as electric power, communication, construction, transportation, aerospace, etc., providing efficient and reliable solutions for the production of various types of wires and cables.

[0003] Currently, when extruding the plastic shell of wires and cables through a screw extruder, it is necessary to wrap the plastic shell around the wire and cable for a certain distance and then introduce it into the cooling system for cooling and forming. At the moment of extrusion through the screw extruder, the plastic shell is still in a soft state. Due to the different pressures inside and outside the extruder, there will be a certain deformation phenomenon of the plastic shell. Moreover, dust particles in the air will also adhere to the surface of the soft plastic shell and are difficult to clean. Therefore, it is urgent to design a plastic shell injection and extrusion device to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a plastic shell injection and extrusion device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A plastic shell injection and extrusion device includes a screw extruder. One end of the screw extruder is fixedly installed with a support frame, and the top of the support frame is fixedly installed with an installation cylinder. A die core cylinder is fixed at the middle position of one end of the installation cylinder. A feeding cylinder is attached to the outer wall of one end of the installation cylinder and the outer wall of the die core cylinder. A communication hole is opened at the middle position of the feeding cylinder. The gap between the inner wall of the communication hole and the outer wall of the die core cylinder is set as a material guiding cavity. A material guiding pipe is fixedly installed between the top of the material guiding cavity and the discharging end of the screw extruder. A heat preservation component is arranged between the outside of the material guiding pipe and the inside of the feeding cylinder. One end of the feeding cylinder is attached to a cooling cylinder, and an extrusion hole is opened at the middle position of the cooling cylinder. The inner diameter of the extrusion hole is the same as the inner diameter of one side of the communication hole. A reinforcement component is arranged between the cooling cylinder, the feeding cylinder, and the installation cylinder. An annular cooling cavity is opened inside the cooling cylinder, and a circulating pump is fixedly installed on one side of the outer wall of the cooling cylinder. One end of the circulating pump is fixedly installed with a cold water inlet pipe inserted into one end of the inner wall of the cooling cavity, and the other end of the circulating pump is fixedly installed with a cold water extraction pipe. The other end of the inner wall of the cooling cavity is fixedly installed with a return pipe extending out of the cooling cylinder.

[0007] Furthermore, spoiler plates are fixedly installed on the inner wall of the cooling cavity at equidistant intervals.

[0008] Furthermore, a wire inlet hole is provided at the middle position of the other end of the installation cylinder, and a stabilizing component is arranged between the interior and the other end of the installation cylinder.

[0009] Furthermore, the stabilizing component includes guiding openings equidistantly arranged at the other end of the installation cylinder, and push rods are inserted into the inner walls of the guiding openings. One end of each push rod is fixedly installed with the same movable frame. A threaded hole is provided at one end of the movable frame. One side of the outer wall of the other end of the installation cylinder is rotatably connected with a threaded rod, and the outer wall of the threaded rod is threadedly connected with the inner wall of the threaded hole. A knob is fixed at one end of the threaded rod. A guiding hole is provided at the other end of the movable frame, and a guiding rod passing through the guiding hole is fixed on the other side of the outer wall of the other end of the installation cylinder. Connecting seats are fixedly arranged on the circumferential inner wall of the installation cylinder at equidistant intervals, and rotating plates are rotatably connected to both sides of each connecting seat through pin shafts. Clamping wheels are rotatably connected between the bottom ends of adjacent rotating plates through pin shafts. Connecting grooves are provided at the middle positions of the rotating plates, and traction rods passing through the connecting grooves are rotatably connected to both sides of one end of each push rod through pin shafts. The cross section of the traction rod is designed in a T shape.

[0010] Furthermore, the heat preservation component includes an annular heat preservation cavity opened inside the feeding cylinder, and a heat preservation pipe sleeving the outer wall of the material guiding pipe is fixed on one side of the top of the heat preservation cavity. The material guiding pipe passes through the interior of the heat preservation cavity. A heater is fixedly installed on one side of the outer wall of the feeding cylinder, and a heating pipe inserted into the heat preservation cavity is fixed on one side of the heater.

[0011] Furthermore, the reinforcement component includes reinforcement screw holes equidistantly opened on the installation cylinder, the feeding cylinder and the cooling cylinder, and the same reinforcement screw rod is threadedly connected to the inner walls of the reinforcement screw holes in the same column.

[0012] Furthermore, docking holes are opened at one end of the installation cylinder and one end of the feeding cylinder in an equidistant annular distribution, and docking columns are fixedly arranged on the inner walls of the other end of the feeding cylinder and the other end of the cooling cylinder at equidistant intervals. The docking columns are inserted into the docking holes.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] In the utility model, by arranging the installation cylinder and the stabilizing component, after the wire and cable pass through the wire inlet hole, the die core cylinder, the communication hole and the extrusion hole, a plurality of clamping wheels are all attached to the outer wall of the wire and cable, so that the cable can be located at the exact center position of the extrusion area of the extrusion device, ensuring the stable performance of the wire and cable during operation, and being more adaptable to cables of various diameters, thus improving the scope of application.

[0015] In the present utility model, through the provided feeding cylinder, heat preservation component and material guiding pipe, the heat preservation component is used to heat the interiors of the heat preservation cavity and the heat preservation pipe, so as to be able to perform heat preservation treatment on the plastic shell molten material flowing in the material guiding pipe and the material guiding cavity, and avoid the problem that the plastic shell molten material solidifies during material guiding and is not easily wrapped around the wire and cable.

[0016] In the present utility model, through the provided cooling cylinder, cooling cavity, circulation pump, cold water extraction pipe, cold water inlet pipe, return pipe and turbulence plate, under the circulation action of the circulation pump and the turbulence action of the turbulence plate, the cold water circulates in the cooling cavity, and can perform cooling treatment on the initially extruded plastic shell, so that the plastic shell is initially formed on the surface of the wire and cable, avoiding the problem of plastic shell deformation caused by different internal and external pressures at the moment of extrusion, and also avoiding to a certain extent the problem that dust particles in the air enter the plastic shell and cannot be cleaned. Description of the Drawings

[0017] Figure 1 It is a front view of a plastic shell injection and extrusion device.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the mounting cylinder, feeding cylinder and cooling cylinder of a plastic shell injection and extrusion device.

[0019] Figure 3 It is a front sectional view of the mounting cylinder, feeding cylinder and cooling cylinder of a plastic shell injection and extrusion device.

[0020] Figure 4 It is an overall sectional view of the mounting cylinder, feeding cylinder and cooling cylinder of a plastic shell injection and extrusion device.

[0021] Figure 5 It is a sectional view of the mounting cylinder of a plastic shell injection and extrusion device.

[0022] Figure 6 It is a structural schematic diagram of the stabilizing component of a plastic shell injection and extrusion device.

[0023] Figure 7 It is a sectional view of the feeding cylinder of a plastic shell injection and extrusion device.

[0024] Figure 8 It is a sectional view of the cooling cylinder of a plastic shell injection and extrusion device.

[0025] In the figure: 1, screw extruder; 2, installation cylinder; 3, feeding cylinder; 4, cooling cylinder; 5, heat preservation pipe; 6, heater; 7, circulation pump; 8, cold water extraction pipe; 9, return pipe; 10, material guiding pipe; 11, reinforcing screw; 12, stabilizing component; 1201, guiding port; 1202, push-pull rod; 1203, movable frame; 1204, threaded rod; 1205, knob; 1206, connecting seat; 1207, rotating plate; 1208, clamping wheel; 1209, connecting groove; 1210, traction rod; 1211, guiding rod; 13, wire inlet hole; 14, die core cylinder; 15, material guiding cavity; 16, cooling cavity; 17, flow disturbing plate; 18, extrusion hole; 19, communication hole; 20, heat preservation cavity; 21, heating pipe; 22, docking column; 23, reinforcing screw hole; 24, docking hole. Detailed implementation manners

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-8, in the embodiment of the present utility model, a plastic shell injection and extrusion device includes a screw extruder 1. One end of the screw extruder 1 is fixedly installed with a support frame, and the top of the support frame is fixedly installed with an installation cylinder 2. A die core cylinder 14 is fixed at the middle position of one end of the installation cylinder 2. A feeding cylinder 3 is attached to the outer wall of one end of the installation cylinder 2 and the outer wall of the die core cylinder 14. A communication hole 19 is opened at the middle position of the feeding cylinder 3. An inlet hole 13 is opened at the middle position of the other end of the installation cylinder 2. A stabilizing component 12 is arranged between the inside and the other end of the installation cylinder 2. The gap between the inner wall of the communication hole 19 and the outer wall of the die core cylinder 14 is set as a material guiding cavity 15. A material guiding pipe 10 is fixedly installed between the top of the material guiding cavity 15 and the discharging end of the screw extruder 1. A heat preservation component is arranged between the outside of the material guiding pipe 10 and the inside of the feeding cylinder 3. A cooling cylinder 4 is attached to one end of the feeding cylinder 3. An extrusion hole 18 is opened at the middle position of the cooling cylinder 4. The inner diameter of the extrusion hole 18 is the same as the inner diameter of one side of the communication hole 19. A reinforcing component is arranged between the cooling cylinder 4, the feeding cylinder 3 and the installation cylinder 2. An annular cooling cavity 16 is opened inside the cooling cylinder 4. A circulating pump 7 is fixedly installed on one side of the outer wall of the cooling cylinder 4. One end of the circulating pump 7 is fixedly installed with a cold water inlet pipe inserted into one end of the inner wall of the cooling cavity 16. The other end of the circulating pump 7 is fixedly installed with a cold water extraction pipe 8. The other end of the inner wall of the cooling cavity 16 is fixedly installed with a return pipe 9 extending out of the cooling cylinder 4. The inner wall of the cooling cavity 16 is fixedly installed with evenly distributed flow disturbing plates 17. Connect the cold water extraction pipe 8 and the return pipe 9 to the subsequent water cooling system of the entire screw extruder 1. Through the circulating action of the circulating pump 7 and the flow disturbing action of the flow disturbing plates 17, cold water circulates in the cooling cavity 16, so as to be able to cool down the initially extruded plastic shell, enabling the plastic shell to be initially formed on the surface of the wire and cable, avoiding the problem of plastic shell deformation caused by different internal and external pressures during extrusion, and also avoiding to a certain extent the problem that dust particles in the air enter the plastic shell and cannot be cleaned up.

[0028] Specifically, the stabilizing component 12 includes guiding openings 1201 equidistantly formed at the other end of the mounting cylinder 2, and push rods 1202 are inserted into the inner walls of the guiding openings 1201. One end of each push rod 1202 is fixedly installed with a same movable frame 1203. A threaded hole is formed at one end of the movable frame 1203. One side of the outer wall at the other end of the mounting cylinder 2 is rotatably connected with a threaded rod 1204. The outer wall of the threaded rod 1204 is screwed with the inner wall of the threaded hole. One end of the threaded rod 1204 is fixed with a knob 1205. A guiding hole is formed at the other end of the movable frame 1203, and a guiding rod 1211 passing through the guiding hole is fixedly installed on the other side of the outer wall at the other end of the mounting cylinder 2. The circumferential inner wall of the mounting cylinder 2 is fixedly provided with connecting seats 1206 distributed equidistantly, and both sides of each connecting seat 1206 are rotatably connected with a rotating plate 1207 through a pin shaft. A clamping wheel 1208 is rotatably connected between the bottom ends of two adjacent rotating plates 1207 through a pin shaft. Connecting grooves 1209 are formed at the middle positions of the rotating plates 1207, and traction rods 1210 passing through the connecting grooves 1209 are rotatably connected to both sides of one end of the push rod 1202 through a pin shaft. The cross section of the traction rod 1210 is designed in a T shape. By driving the threaded rod 1204 to rotate with the knob 1205 in the stabilizing component 12, the positions of the movable frame 1203 and the push rods 1202 are changed, and the inclination of the rotating plates 1207 is adjusted, so that a plurality of clamping wheels 1208 are all attached to the outer wall of the wire and cable, enabling the cable to be located at the exact center of the extrusion area of the extrusion device and ensuring the stable performance of the wire and cable during operation.

[0029] Specifically, the heat preservation component includes an annular heat preservation cavity 20 formed inside the feeding cylinder 3, and a heat preservation pipe 5 sleeving the outer wall of the material guiding pipe 10 is fixedly installed on one side at the top of the heat preservation cavity 20. The material guiding pipe 10 passes through the inside of the heat preservation cavity 20. One side of the outer wall of the feeding cylinder 3 is fixedly installed with a heater 6, and a heating pipe 21 inserted into the heat preservation cavity 20 is fixedly installed on one side of the heater 6. By using the heater 6 and the heating pipe 21 in the heat preservation component to heat the inside of the heat preservation cavity 20 and the heat preservation pipe 5, the plastic shell molten material flowing in the material guiding pipe 10 and the material guiding cavity 15 can be heat-preserved, avoiding the problem that the plastic shell molten material solidifies during material guiding and is difficult to wrap around the wire and cable.

[0030] Specifically, the reinforcement component includes reinforcement screw holes 23 equidistantly formed on the mounting cylinder 2, the feeding cylinder 3 and the cooling cylinder 4, and the same reinforcement screw 11 is screwed into the inner walls of the same column of reinforcement screw holes 23. Equal-distance annularly distributed butt holes 24 are formed at one end of the mounting cylinder 2 and one end of the feeding cylinder 3, and butt columns 22 distributed equidistantly are fixedly installed on the inner walls at the other ends of the feeding cylinder 3 and the cooling cylinder 4. The butt columns 22 are inserted into the butt holes 24. The assembly of the mounting cylinder 2, the feeding cylinder 3 and the cooling cylinder 4 is facilitated through the clamping effect of the butt columns 22 and the butt holes 24 and the screwing effect of the reinforcement screw 11 and the reinforcement screw holes 23.

[0031] The working principle of the utility model is as follows: When in use, the user passes the wire and cable through the inlet hole 13, the die core cylinder 14, the communication hole 19 and the extrusion hole 18. The knob 1205 in the stabilizing component 12 drives the threaded rod 1204 to rotate, changes the positions of the movable frame 1203 and the push-pull rod 1202, and adjusts the inclination of the rotating plate 1207, so that multiple clamping wheels 1208 are all attached to the outer wall of the wire and cable, making the cable be in the exact center position of the extrusion area of the extrusion device. Then, the screw extruder 1 is used to squeeze the plastic shell molten material into the guide cavity 15 through the guide pipe 10, and then it is extruded through the communication hole 19 and the extrusion hole 18 and wrapped on the wire and cable. Moreover, the user can use the heater 6 and the heating pipe 21 in the heat preservation component to heat the inside of the heat preservation cavity 20 and the heat preservation pipe 5, and can perform heat preservation treatment on the plastic shell molten material flowing in the guide pipe 10 and the guide cavity 15 to avoid the solidification of the plastic shell molten material during feeding. During extrusion, the user connects the cold water extraction pipe 8 and the return pipe 9 to the subsequent water cooling system of the whole screw extruder 1, and the cold water circulates in the cooling cavity 16 under the circulation action of the circulation pump 7 and the flow disturbing action of the flow disturbing plate 17, so as to be able to cool down the initially extruded plastic shell, making the plastic shell initially formed on the surface of the wire and cable.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms.

Claims

1. A plastic shell injection and extrusion device, comprising a screw extruder (1), characterized in that: One end of the screw extruder (1) is fixedly installed with a support frame, and the top of the support frame is fixedly installed with an installation cylinder (2). A die core cylinder (14) is fixed at the middle position of one end of the installation cylinder (2). A feeding cylinder (3) is attached to the outer wall of one end of the installation cylinder (2) and the outer wall of the die core cylinder (14). A communication hole (19) is provided at the middle position of the feeding cylinder (3). The space between the inner wall of the communication hole (19) and the outer wall of the die core cylinder (14) is set as a material guiding cavity (15). A material guiding pipe (10) is fixedly installed between the top of the material guiding cavity (15) and the discharging end of the screw extruder (1). A heat preservation component is arranged between the outside of the material guiding pipe (10) and the inside of the feeding cylinder (3). One end of the feeding cylinder (3) is attached to a cooling cylinder (4). An extrusion hole (18) is provided at the middle position of the cooling cylinder (4). The inner diameter of the extrusion hole (18) is the same as the inner diameter of one side of the communication hole (19). A reinforcement component is arranged between the cooling cylinder (4), the feeding cylinder (3) and the installation cylinder (2). An annular cooling cavity (16) is provided inside the cooling cylinder (4). A circulating pump (7) is fixedly installed on one side of the outer wall of the cooling cylinder (4). One end of the circulating pump (7) is fixedly installed with a cold water inlet pipe inserted into one end of the inner wall of the cooling cavity (16), and the other end of the circulating pump (7) is fixedly installed with a cold water extraction pipe (8). The other end of the inner wall of the cooling cavity (16) is fixedly installed with a return pipe (9) extending out of the cooling cylinder (4).

2. The plastic shell injection and extrusion device according to claim 1, characterized in that: The inner wall of the cooling cavity (16) is fixedly installed with spoiler plates (17) distributed at equal distances.

3. A plastic shell injection and extrusion device according to claim 1, characterized in that: A wire inlet hole (13) is provided at the middle position of the other end of the installation cylinder (2), and a stabilizing component (12) is arranged between the inside and the other end of the installation cylinder (2).

4. The plastic shell injection and extrusion device according to claim 3, wherein: The stabilizing component (12) includes guiding ports (1201) opened at equal distances at the other end of the installation cylinder (2). Push-pull rods (1202) are inserted into the inner walls of the guiding ports (1201). One end of each push-pull rod (1202) is fixedly installed with the same movable frame (1203). A threaded hole is provided at one end of the movable frame (1203). One side of the outer wall of the other end of the installation cylinder (2) is rotatably connected with a threaded rod (1204). The outer wall of the threaded rod (1204) is screwed with the inner wall of the threaded hole. One end of the threaded rod (1204) is fixed with a knob (1205). A guiding hole is provided at the other end of the movable frame (1203), and a guiding rod (1211) passing through the guiding hole is fixed on the other side of the outer wall of the other end of the installation cylinder (2). Connecting seats (1206) are fixedly installed on the circumferential inner wall of the installation cylinder (2) at equal distances. Rotating plates (1207) are rotatably connected to both sides of each connecting seat (1206) through pin shafts. Clamping wheels (1208) are rotatably connected between the bottoms of adjacent rotating plates (1207) through pin shafts. Connecting grooves (1209) are provided at the middle positions of the rotating plates (1207). Traction rods (1210) passing through the connecting grooves (1209) are rotatably connected to both sides of one end of each push-pull rod (1202) through pin shafts. The cross section of the traction rod (1210) is designed in a T shape.

5. The plastic shell injection and extrusion device according to claim 4, characterized in that: The heat preservation component includes an annular heat preservation cavity (20) formed inside the feeding cylinder (3), and a heat preservation pipe (5) sleeved on the outer wall of the material guiding pipe (10) is fixed on one side of the top of the heat preservation cavity (20). The material guiding pipe (10) passes through the inside of the heat preservation cavity (20). One side of the outer wall of the feeding cylinder (3) is fixedly installed with a heater (6), and one side of the heater (6) is fixedly installed with a heating pipe (21) inserted into the heat preservation cavity (20).

6. A plastic shell injection and extrusion device according to claim 1, characterized in that: The reinforcement component includes reinforcement screw holes (23) opened at equal distances on the installation cylinder (2), the feeding cylinder (3) and the cooling cylinder (4), and the inner walls of the same column of reinforcement screw holes (23) are screwed with the same reinforcement screw (11).

7. An injection and extrusion device for plastic shells according to claim 1, characterized in that: One end of the installation cylinder (2) and one end of the feeding cylinder (3) are both provided with docking holes (24) distributed in an annular shape at equal distances, and docking columns (22) are fixed on the inner walls of the other ends of the feeding cylinder (3) and the cooling cylinder (4) at equal distances. The docking columns (22) are inserted into the docking holes (24).

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