CN220742065U - Double-layer co-extrusion die assembly for improving wear resistance of insulation layer of drag chain cable - Google Patents

Abstract

The double-layer co-extrusion die assembly for improving the wear resistance of the cable insulation layer of the drag chain comprises a front end die arranged at the front end of a machine head and a shunt connected to the extrusion end of the front end die; the diverter comprises a pipe body and a spiral connecting part arranged at one end of the pipe body, the diverter is connected in a fixed cavity of the front end die and is connected through the spiral connecting part, an outer injection groove recessed along the axial direction is arranged on the pipe body, a second injection channel is arranged on the machine head corresponding to the outer injection groove, and a second feeding injection port is arranged at the upper end of the second injection channel; the outer layer injection groove is communicated with the splitter box, the splitter box is communicated with the inlet end of the splitter box surrounding the outer surface of the pipe body, the plastic melt in the outer layer injection groove flows into the splitter box through the splitter box, the outlet end of the splitter box is connected with the annular ring groove, a plurality of narrow-hole flow channels are arranged in the annular ring groove, the plastic melt is extruded through the pore canal after being injected into the annular ring groove, the plastic melt is ensured to be changed into linear motion from spiral motion, sufficient compression ratio and forming pressure are generated, and the extruded plastic melt is compact.

Description

Double-layer co-extrusion die assembly for improving wear resistance of insulation layer of drag chain cable

Technical Field

The utility model relates to the technical field of towline signal cable production equipment, in particular to a double-layer co-extrusion die assembly for improving wear resistance of a towline cable insulating layer.

Background

The towline signal cable (Drag Chain Signal Cable) is a cable for transmitting signals and is widely used in equipment and systems requiring frequent movement and bending. It is mainly characterized by softness, bending resistance, abrasion resistance and corrosion resistance. The towline signal cable is generally composed of a plurality of wires, wherein the wires are isolated and protected by an insulating layer, and a stretch-proof and wear-resistant sheath material is added on the outer layer.

Drag chain signal cables find wide application in the following scenarios:

1. automation device: the towline signal cable is widely applied to various automatic equipment, such as automatic assembly lines, production lines, packaging equipment and the like. These devices often require frequent movement and bending, and the tow chain signal cable can provide stable signal transmission, ensuring proper operation of the device and accurate transmission of data.

2. Machine tool and numerical control machine: machine tools and numerical control machines typically require complex process operations and motion control. The drag chain signal cable can be used for transmitting signals in a machine tool control system, such as position control, sensor signals and the like, so that accurate control and movement accuracy are ensured.

3. And (3) a robot: tow chain signal cables are widely used in industrial robots for transmitting control signals, sensor signals and signals of the end effectors of the robot. Because robots often require frequent movements and attitude changes, the tow chain signal cable can maintain stability and reliability of signal transmission.

4. Handling equipment and conveying system: in the logistics and storage fields, various conveying equipment and conveying systems are required to convey and transport materials. The towline signal cable is used for transmitting control signals, sensor signals, equipment states and other information in the equipment, and high-efficiency conveying of materials and normal operation of the equipment are ensured.

Generally, a towline signal cable is mainly used in equipment and systems that require frequent movement and bending to meet signal transmission requirements and ensure reliable operation of the equipment. It plays an important role in the fields of automation equipment, machine tools, robots, conveying equipment, conveying systems and the like.

The cable insulation layer is extruded by a double-layer coextrusion technology, and is characterized in that the cable core insulation layer is formed by compounding an inner insulation layer and an outer insulation layer. The same-color insulating layer and the external color separation layer are different in materials, so that the integral flexibility of the cable can be guaranteed by using TPE materials for the inner insulating layer of the towline signal cable, and the special outer insulating leather can be coated on the surface of the cable, so that the viscosity of the surface of the TPE materials is effectively solved, the friction coefficient between insulating cores is reduced, and the wear resistance and mechanical strength of the insulating cores are improved.

The domestic application number CN202010620129.8 discloses a color separation cable extrusion die, which is tubular and is provided with a material injection groove on the outer surface; along the axial direction of the die, the edge of the material injection groove is arranged, the outer surface of the die is provided with a diversion groove, and the diversion groove surrounds the outer surface of the die; two ends of the material injection groove are connected with the diversion groove, and materials in the material injection groove flow into the diversion groove through the two ends; along the axial direction of the die, at one side of the splitter box and between the splitter box and the end part of the die, the outer surface of the die is provided with a material dividing surface which is lower than the outer surface of the die, the material dividing surface is provided with a plurality of material injecting small holes, and the material injecting small holes are distributed in a surrounding way; a boss is connected to the inner wall of the die at the position of the material injection small hole on the inner side of the die, a material gathering groove is formed between the boss and the inner wall of the die, the material gathering groove is communicated with the material injection small hole, and the material is injected into the material gathering groove through the material injection small hole; the boss height is lower than the end face height of the die along the axial direction of the die; the utility model can realize normal production of color separation cables, and can save production cost compared with a special machine head with a complex structure. Although can realize double-deck crowded altogether, the silo cooperation splitter box of this mould can't ensure to make plastics fuse-element become rectilinear movement by helical motion, also can't produce sufficient compression ratio, produces necessary shaping pressure, makes the plastics fuse-element of extruding closely knit, through make the closely knit just can be better in the junction with the inlayer insulating layer of extruding outer insulating layer connect, stable even parcel inlayer insulating layer periphery.

Disclosure of Invention

In order to solve the problems, the utility model provides a double-layer co-extrusion die assembly for improving the wear resistance of a drag chain cable insulating layer, which is characterized in that a front end die and a diverter are arranged in a mutually matched manner, and various channels of the diverter are continuously optimized on the basis, so that the mutually matched channels are mutually matched, a plastic melt is changed from spiral motion to linear motion, sufficient compression ratio and necessary forming pressure can be generated, the extruded plastic melt is compact, the extruded outer insulating layer can be better connected at the connecting part with the inner insulating layer through compacting, and the extruded outer insulating layer is stably wrapped around the outer periphery of the inner insulating layer.

In order to achieve the above purpose, the double-layer co-extrusion die assembly for improving the wear resistance of the insulation layer of the drag chain cable comprises a front end die arranged at the front end of a machine head, wherein a first feeding sprue is arranged on the machine head corresponding to a first sprue, the outflow end of the first sprue is connected with the front end die, and the double-layer co-extrusion die assembly further comprises a diverter connected with the extrusion end of the front end die;

the diverter comprises a pipe body and a spiral connecting part arranged at one end of the pipe body, the diverter is connected in a fixed cavity of the front end die and is connected through the spiral connecting part, an outer injection groove recessed along the axial direction is arranged on the pipe body, a second injection channel is arranged on the machine head corresponding to the outer injection groove, and a second feeding injection port is arranged at the upper end of the second injection channel;

the outer layer annotates the silo and the splitter box intercommunication, the splitter box with encircle the guiding gutter entrance point intercommunication of body external surface, plastics fuse-element in the outer layer annotates the silo is passed through the splitter box flows towards in the guiding gutter, the guiding gutter exit end is connected with annular ring groove, be equipped with a plurality of narrow hole runners in the annular ring groove, plastics fuse-element is poured into behind the annular ring groove pass through the narrow hole runner extrudes.

Further, the second annotates the slope setting, the discharge end of second annotates the way with locate the second that outer notes silo one end connects the material end to be connected, outer notes silo with the shunt channels junction is equipped with outer notes material and keeps off the portion, outer notes material keeps off the trend spiral connection portion sets up.

Further, the diversion channel comprises diversion channels respectively arranged at two ends, and the diversion channels are communicated with the diversion channel.

Further, the diversion trench is in a sine state and is sealed and surrounded on the pipe body, the diversion trench comprises a peak top and a valley bottom, the peak top is connected with the diversion channel, and the valley bottom is communicated with the annular ring groove.

Further, the narrow-hole flow channel circumferential array is arranged in the annular ring groove, a dividing groove is formed in the end portion, close to the annular ring groove, of the pipe body in an inward concave mode, and the narrow-hole flow channel is communicated with the dividing groove.

Further, the dividing groove and the inner cavity of the pipe body form a thickness control part, after the insulating material forming the insulating jacket layer is extruded from the narrow-hole flow passage, the insulating jacket layer is coated and wrapped along the axial direction, and the thickness control part influences a certain thickness of the insulating jacket layer formed by extrusion.

Further, the first injection channel comprises an injection part, a first narrowing channel and a second narrowing channel, the maximum cross-sectional area of the first narrowing channel is smaller than the cross-sectional area of the injection part, and the maximum cross-sectional area of the second narrowing channel is smaller than the minimum cross-sectional area of the first narrowing channel.

Further, the pipe body is provided with a limiting protrusion in a protruding mode, the front end die is provided with a jack corresponding to the limiting protrusion, and the limiting protrusion and the jack are mutually inserted.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, through arranging the front end die, the diverter, the first injection channel and the second injection channel which are matched with each other, double-layer coextrusion is realized, and the insulating jacket layer extruded to the outer layer can be well connected at the joint of the insulating jacket layer extruded to the inner layer by compacting, so that the insulating jacket layer is stably and uniformly wrapped around the inner layer insulating layer.

Through optimizing various channels on the diverter, set up outer notes silo, splitter box, guiding gutter, annular ring groove and narrow hole runner, ensure to make the plastics fuse-element change rectilinear motion from helical motion.

Through setting up the narrow hole runner that circumference was arranged in whole, the intercommunication divides the groove, forms the compression ratio, produces necessary shaping pressure, makes the plastics melt of extruding closely knit, and narrow runner reinforcing shear simultaneously makes plastics obtain further plasticization, increases product strength.

For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.

Drawings

FIG. 1 is a cross-sectional view of a dual layer co-extrusion die assembly for enhancing the wear resistance of a drag chain cable insulation layer in accordance with the present utility model;

FIG. 2 is a cross-sectional view of a nose in a dual-layer co-extrusion die assembly for enhancing the wear resistance of a drag chain cable insulation layer in accordance with the present utility model;

FIG. 3 is a perspective view of a shunt tube in a double-layer co-extrusion die assembly for improving the wear resistance of a drag chain cable insulation layer in accordance with the present utility model;

FIG. 4 is a cross-sectional view of a shunt tube in a double-layer co-extrusion die assembly for enhancing the wear resistance of a drag chain cable insulation layer in accordance with the present utility model;

fig. 5 is an enlarged detail view at D in fig. 1;

fig. 6 is a cross-sectional view of a tow chain signal cable produced in accordance with the present utility model.

In the figure: A. a conductor; B. an insulating layer; C. an insulating jacket layer; 1. a machine head; 110. a first sprue; 1101. a first feeding sprue; 111. an injection part; 112. a first narrowing way; 113. a second narrowing passage; 2. a front end die; 201. a conductor lumen; 200. a fixed cavity; 209. a jack; 3. a shunt; 301. a tube body; 302. a screw connection portion; 309. a limit bulge; 3010. a thickness control part; 4. an outer layer material injection groove; 401. the second material receiving end; 402. an outer layer material injection blocking part; 5. a shunt channel; 501. a shunt channel; 6. a diversion trench; 601. peak top; 602. the bottom of the valley; 7. an annular ring groove; 701. a narrow bore flow passage; 8. a second sprue; 801. a second feeding sprue; 9. dividing grooves.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings, but the scope of the present utility model is not limited to the following.

Referring to fig. 1-5, the double-layer co-extrusion die assembly for improving the wear resistance of the insulation layer of the drag chain cable comprises a front end die 2 arranged at the front end of a machine head 1, wherein a first feeding sprue 1101 is arranged on the machine head 1 corresponding to a first sprue 110, the outflow end of the first sprue 110 is connected with the front end die 2, and a flow divider 3 connected with the extrusion end of the front end die 2 is further included;

the flow divider 3 comprises a pipe body 301 and a spiral connecting part 302 arranged at one end of the pipe body 301, the flow divider 3 is connected in the fixed cavity 200 of the front end die 2 through the spiral connecting part 302, an outer-layer injection groove 4 recessed along the axial direction is arranged on the pipe body 301, a second injection channel 8 is arranged on the machine head 1 corresponding to the outer-layer injection groove 4, and a second feeding injection port 801 is arranged at the upper end of the second injection channel 8;

the outer layer injection groove 4 is communicated with the diversion groove 5, the diversion groove 5 is communicated with the inlet end of the diversion groove 6 encircling the outer surface of the pipe body 301, plastic melt in the outer layer injection groove 4 flows into the diversion groove 6 through the diversion groove 5, the outlet end of the diversion groove 6 is connected with the annular ring groove 7, a plurality of narrow-hole flow passages 701 are arranged in the annular ring groove 7, and the plastic melt is extruded through the narrow-hole flow passages 701 after being injected into the annular ring groove 7. The plastic melt passing through the narrow-hole runner 701 enters the narrow-hole runner 701 with a smaller flow cross section from the annular ring groove 7 with a larger flow cross section, and due to the suddenly reduced flow cross section, the flow velocity of the plastic melt is rapidly improved, the shearing force of the plastic melt is enhanced, meanwhile, the plastic melt is different from the flow velocity of another plastic melt extruded from the front end model 2, the compression ratio is formed between the plastic melt and the plastic melt, the necessary forming pressure is generated, the extruded plastic melt is tightly wrapped in the front end model 2 and flows out of the plastic melt to form an insulating jacket layer C, double-layer coextrusion is realized, and double-layer extrusion wrapping of a core wire is completed in one step of a machine. The extrusion outer insulating layer is compact, the connection with the inner insulating layer can be better realized, the inner insulating layer is stably and uniformly wrapped, and the service quality and the service life of the later-stage towline signal cable are ensured.

The second annotates the slope setting of way 8, and the discharge end of second annotates the way 8 and is located the second and connect the material end 401 to be connected of outer notes silo 4 one end, and outer notes silo 4 and shunt channels 5 junction is equipped with outer notes material and keeps off the portion 402, and outer notes material keeps off 402 trend spiral connection portion 302 setting. When the plastic melt flows horizontally to the outer layer material injecting blocking part 402 through the second material receiving end 401 with radian through the second material injecting channel 8, the plastic melt can flow to the diversion trench 6 at a uniform speed due to the blocking buffer of the outer layer material injecting blocking part 402 by the outer layer material injecting blocking part 402 which is slightly inclined towards the spiral connecting part 302, and meanwhile, the plastic melt which moves along the pipe body 301 in the outer layer material injecting trench 4 axially enters the diversion trench 5 and moves along the pipe body 301 circumferentially.

The diversion trench 5 includes diversion channels 501 provided at both ends respectively, and the diversion channels 501 are communicated with the diversion trench 6.

The diversion trench 6 is in a sine state and surrounds the pipe body 301 in a closed mode, the diversion trench 6 comprises a peak top 601 and a valley bottom 602 (namely, the diversion trench flows out of the communicating part), the peak top 601 is connected with the diversion channel 501, the valley bottom 602 is communicated with the annular ring groove 7, plastic melt is injected into the annular ring groove 7 through the diversion trench 6, and then flows out through a narrow Kong Lidao, so that a sufficient compression ratio is generated, necessary forming pressure is generated, and the extruded plastic melt is compacted.

The narrow-hole flow channels 701 are circumferentially arranged in the annular ring groove 7, the end part of the pipe body 301, which is close to the annular ring groove 7, is inwards recessed and provided with the dividing groove 9, and the narrow-hole flow channels 701 are communicated with the dividing groove 9. The front end die 2 is inserted into the shunt 3, the conductor A is arranged in the conductor cavity 201 of the front end die 2 and moves towards the shunt 3 under the thrust, meanwhile, the plastic melt forming the insulating layer B flows towards the front end die 2 from the first sprue 3, the extruded plastic melt is extruded and coated on the outer surface of the front end die 2 to form the insulating layer B, meanwhile, the shunt 3 is used for extruding the plastic melt to form the insulating jacket layer C of the closed chamber outside the insulating layer B, so that the insulating material meets the soft, wear-resistant and bending-resistant multilayer property, but the soft, wear-resistant and bending-resistant property of the insulating layer B is increased on the practical TPE material, the surface tackiness of the insulating layer B is increased, dust impurities are easy to adhere, the friction coefficient between insulating cores is reduced, the wear resistance and the mechanical strength of the insulating cores are improved, the PE material used by the insulating jacket layer C is arranged through a specific flow passage on the shunt 3, the extruded plastic melt is compacted, meanwhile, the narrow flow passage is reinforced and shearing is realized, and the insulating jacket layer of the double-layer can be better connected with the insulating layer of the inner layer through the connecting part of the insulating jacket layer of the extruding layer, and the insulating layer of the inner layer is stable and the insulating layer is wrapped outside and uniformly.

The dividing groove 9 and the inner cavity of the pipe body 301 form a thickness control part 3010, after the insulating material forming the insulating jacket layer C is extruded from the narrow-hole runner 701, the insulating jacket layer C is coated and wrapped along the axial direction, and the thickness of the insulating jacket layer C formed by extrusion is enabled to be a certain thickness by the influence of the thickness control part 3010.

The first injection channel 110 includes an injection portion 111, a first narrowing channel 112, and a second narrowing channel 113, wherein the maximum cross-sectional area of the first narrowing channel 112 is smaller than the cross-sectional area of the injection portion 111, and the maximum cross-sectional area of the second narrowing channel 113 is smaller than the minimum cross-sectional area of the first narrowing channel 112. For increasing the entry speed of the plastic melt while extrusion of the insulation B is performed, while the smooth front end die 2 gives the extruded insulation B softness.

The pipe body 301 is provided with a limiting protrusion 309 in a protruding mode, the front end die 2 is provided with a jack 209 corresponding to the limiting protrusion 309, and the limiting protrusion 309 and the jack 209 are mutually inserted.

The foregoing disclosure is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the claims herein, as equivalent changes to the claims herein fall within the scope of the utility model.

Claims (8)

1. The double-layer co-extrusion die assembly for improving the wear resistance of the cable insulation layer of the drag chain comprises a front end die (2) arranged at the front end of a machine head (1), wherein a first feeding sprue (1101) is arranged on the machine head (1) corresponding to a first sprue (110), and the outflow end of the first sprue (110) is connected with the front end die (2), and the double-layer co-extrusion die assembly is characterized by further comprising a shunt (3) connected with the extrusion end of the front end die (2);

the diverter (3) comprises a pipe body (301) and a spiral connecting part (302) arranged at one end of the pipe body (301), the diverter (3) is connected in a fixed cavity (200) of the front end die (2) and is connected through the spiral connecting part (302), an outer injection groove (4) recessed along the axial direction is arranged on the pipe body (301), a second injection channel (8) is arranged on the machine head (1) corresponding to the outer injection groove (4), and a second feeding injection port (801) is arranged at the upper end of the second injection channel (8);

the plastic melt injection device is characterized in that the outer layer injection groove (4) is communicated with the diversion groove (5), the diversion groove (5) is communicated with the inlet end of the diversion groove (6) encircling the outer surface of the pipe body (301), the plastic melt in the outer layer injection groove (4) flows into the diversion groove (6) through the diversion groove (5), the outlet end of the diversion groove (6) is connected with the annular ring groove (7), a plurality of narrow-hole flow channels (701) are arranged in the annular ring groove (7), and the plastic melt is injected into the annular ring groove (7) and then extruded through the narrow-hole flow channels (701).

2. The double-layer co-extrusion die assembly for improving wear resistance of a towline cable insulation layer according to claim 1, wherein the second injection channel (8) is obliquely arranged, a discharge end of the second injection channel (8) is connected with a second receiving end (401) arranged at one end of the outer injection groove (4), an outer injection blocking part (402) is arranged at a joint of the outer injection groove (4) and the shunt groove (5), and the outer injection blocking part (402) is inclined towards the spiral connecting part (302).

3. The double-layer co-extrusion die assembly for improving the wear resistance of the insulation layer of the towline cable according to claim 2, wherein the diversion trench (5) comprises diversion channels (501) respectively arranged at two ends, and the diversion channels (501) are communicated with the diversion trench (6).

4. A double-layer co-extrusion die assembly for improving wear resistance of a towline cable insulation layer according to claim 3, wherein the diversion trench (6) is enclosed and surrounds the pipe body (301) in a sinusoidal state, the diversion trench (6) comprises a peak top (601) and a valley bottom (602), the peak top (601) is connected with the diversion channel (501), and the valley bottom (602) is communicated with the annular ring groove (7).

5. The double-layer co-extrusion die assembly for improving wear resistance of a towline cable insulation layer according to claim 4, wherein the narrow-hole runner (701) is circumferentially arranged in the annular ring groove (7), a dividing groove (9) is formed in an inward recess of one end portion of the pipe body (301) close to the annular ring groove (7), and the narrow-hole runner (701) is communicated with the dividing groove (9).

6. The double-layer co-extrusion die assembly for improving the wear resistance of the insulation layer of the drag chain cable according to claim 5, wherein the dividing groove (9) and the inner cavity of the pipe body (301) form a thickness control part (3010), the insulation material forming the insulation jacket layer (C) is coated and wrapped along the axial direction after being extruded from the narrow-hole runner (701), and the thickness control part (3010) influences a certain thickness of the insulation jacket layer (C) formed by extrusion.

7. The double-layer co-extrusion die assembly for improving wear resistance of a drag chain cable insulation layer according to claim 1, wherein the first sprue (110) comprises an injection portion (111), a first narrowing channel (112), a second narrowing channel (113), the maximum cross-sectional area of the first narrowing channel (112) being smaller than the cross-sectional area of the injection portion (111), the maximum cross-sectional area of the second narrowing channel (113) being smaller than the minimum cross-sectional area of the first narrowing channel (112).

8. The double-layer co-extrusion die assembly for improving the wear resistance of the insulation layer of the drag chain cable according to claim 1, wherein a limiting protrusion (309) is arranged on the pipe body (301) in a protruding mode, a jack (209) is arranged on the front end die (2) corresponding to the limiting protrusion (309), and the limiting protrusion (309) and the jack (209) are mutually inserted.