CN213797971U - Production device of ratproof silicon core pipe - Google Patents

Abstract

The utility model relates to a production device of ratproof silicon core pipe belongs to silicon core pipe production technology technical field. The production device of the ratproof silicon core pipe comprises a frame, a forming die, a plastic extruder A, a plastic extruder B, a cooling water tank, a rice recording printer and a coiling machine; a forming die is arranged on the frame; one end of the forming die is connected with a plastic extruder A; one side of the forming die is connected with a plastic extruder B; one side of the frame is sequentially provided with a cooling water tank, a rice recording printer and a coiler. The rat-proof silicon core pipe production device is compact in structure and ingenious in design, and the rat-proof silicon core pipe produced by using the rat-proof silicon core pipe can keep smooth in the appearance and the inner wall under the condition that good mechanical properties can be guaranteed; can also ensure the rat-proof effect and meet the production and use requirements of enterprises.

Description

Production device of ratproof silicon core pipe

Technical Field

The utility model relates to a production device of ratproof silicon core pipe belongs to silicon core pipe production technology technical field.

Background

The silicon core pipe has the characteristics of good sealing performance, chemical corrosion resistance and low engineering cost, and is widely used for optical cable communication network systems. After the silicon core pipe is laid, the silicon core pipe is very easy to be gnawed by mice, so that the problem that the communication of cables inside the silicon core pipe is interrupted sometimes occurs. The design of rat-proof silicon core pipes in the current market is generally divided into two types; chemical and physical methods. The chemical method is generally to add a repellent such as capsaicin in a silicon core tube to achieve the purpose of rat prevention. However, this method has a problem that it is easy to pollute the production environment, and the taste of the repellent gradually decreases or disappears with the passage of time, resulting in a problem that the ratproof effect is limited. The physical method is to add a metal protective layer such as metal mesh armor, stainless steel tape armour and the like in the silicon core pipe so as to achieve the purpose of rat prevention by enhancing the hardness of the silicon core pipe. However, when the silicon core pipe is used for rat protection by adding armor, the production cost of the optical cable is greatly increased, the weight and the construction difficulty of the optical cable are also increased, and the requirements of enterprises on economic production and use cannot be met. Aiming at the problems existing in the rat-proof silicon core pipe of the chemical method and the physical method, a silicon core pipe with glass fiber is appeared on the market, and the rat-proof purpose is achieved by utilizing the characteristic that the glass fiber is difficult to chew; for example, the utility model with the publication number of CN107722401B discloses a rat-proof and bird-pecking-proof optical cable, which uses the above method to achieve the purpose of rat-proof. However, the glass fiber has the characteristics of poor fluidity and no melting in plastics, so that the existing method for producing the silicon core tube with the glass fiber has the following problems:

firstly, the glass fiber has the characteristic of poor fluidity, if the proportion of the glass fiber in the raw material is too large, the tensile strength and the elongation of the silicon core pipe finished product are influenced, and the use requirement of the silicon core pipe cannot be met.

Secondly, the glass fiber has the characteristic of not being melted in the plastic, and when the proportion of the glass fiber in the raw materials is too large, the produced silicon core pipe has the problems of large friction coefficient of the inner wall and unsmooth outer surface.

Thirdly, the glass fiber has the characteristic of poor fluidity, and if the glass fiber accounts for too much raw materials, the glass fiber is difficult to be uniformly mixed with other raw materials by directly adopting the existing mode, so that the problem that the silicon core tube is difficult to form and produce is caused.

Therefore, when the rat-proof silicon core pipe with the glass fiber is produced by adopting the existing mode, the occupation ratio of the glass fiber in the silicon core pipe cannot be too high under the condition of ensuring the appearance, tensile strength, elongation and friction coefficient of the inner wall of the silicon core pipe; for example, the utility model with the publication number of CN107722401B discloses a rat and bird pecking proof optical cable, in which the glass fiber is in the outer sheath ratio of 3.1% -15.9%. Therefore, the rat-proof performance is not high due to the fact that the glass fiber occupation ratio is too low, and the defect that the rat-proof performance is not high is made up by arranging the metal net in the pipe body.

Therefore, it is necessary to develop a rat-proof silicon core tube containing a large proportion of glass fibers to solve the above problems existing in the existing rat-proof silicon core tube.

Disclosure of Invention

The utility model aims to provide a: the rat-proof silicon core pipe production device is high in production efficiency and solves the problems that the rat-proof effect is poor and the production cost is high in the existing rat-proof silicon core pipe production technology.

The technical scheme of the utility model is that:

a production device of a ratproof silicon core pipe comprises a frame, a forming die, a plastic extruder A, a plastic extruder B, a cooling water tank, a rice recording printer and a coiling machine; the method is characterized in that: a forming die is arranged on the frame; one end of the forming die is connected with a plastic extruder A; one side of the forming die is connected with a plastic extruder B; one side of the frame is sequentially provided with a cooling water tank, a rice recording printer and a coiler.

The forming die consists of a confluence core and a forming core; one end of the confluence core is connected with a forming core; heating wrapping layers are arranged outside the confluence core and the forming core; the forming core comprises a sealing ring, a connecting flange, a connecting body, a shunting cone, a supporting body, a forming body, a vent pipe, a core mold, a mouth mold and a gland; one end of the support body is fixedly provided with a connecting body through a screw rod; one end of the support body in the connecting body is provided with a spreader cone; one end of the connecting body is provided with a sealing ring; the circumferential surface of one end of the connecting body is connected with a connecting flange in a threaded manner; the forming core is fixedly connected with the confluence core through a connecting flange, a sealing ring and a screw rod; the other end of the support body is fixedly provided with a forming body through a screw; one end of the forming body is fixedly provided with a mouth mold through a gland and a screw; a core mould is fixedly arranged at one end of the forming body in the mouth mould; a breather pipe is arranged in the core mold; one end of the vent pipe is attached to the forming body; one end of the vent pipe penetrates through the support body through the locking pull rod and then is fixedly connected with the shunting cone; the other end of the vent pipe extends to the port of the core mold and is provided with a positioning pressure plate through a vent bolt; the positioning pressure plate is connected with the port of the core mold in an abutting mode.

The core mold is of a cylindrical structure; a forming annular cavity is formed between the core mold and the mouth mold; one end of the forming ring cavity is of a horn-shaped structure; the support body and the forming body are both in a disc-shaped structure; the centers of the support body and the forming body are provided with mutually communicated vent holes; the vent hole of the forming body is communicated with the central hole of the vent pipe; an air inlet communicated with the outside is arranged on the support body at one side of the air vent; a plurality of overflowing holes are formed in the support body and the forming body on the periphery of the vent hole in a divergent mode; one end of the overflowing hole in the forming body is communicated with the overflowing hole in the supporting body, and the other end of the overflowing hole is communicated with the forming annular cavity; the connection body is of a cylindrical structure, and the interior of the connection body is communicated with the overflowing hole in the support body.

The confluence core comprises a machine head connector, a shunting shuttle, an inner layer shunting body, a mould connector, a bracket body and a mixture; a machine head connecting body is fixedly arranged at one end of the bracket body; the machine head connecting body is communicated with the plastic extruder A; a shunting shuttle is fixedly arranged at one end of the bracket body in the handpiece connector; an inner layer shunt body is arranged in the bracket body at one side of the shunt shuttle through a screw; the other end of the bracket body is sequentially connected with a mixing body and a die connecting body; the confluence core is fixedly connected with the forming core through a mould connector.

The bracket body is of a revolving body structure with a convex section; the mixture is in a ring-shaped structure; a mixing ring cavity is formed between the inner part of the mixture and the bracket body; a mixing taper hole is formed in the die connector; the mixing ring cavity is communicated with the mixing taper hole; a tapered feeding hole A is formed in the shunting shuttle; a horn-shaped feeding ring cavity is formed between the shunt shuttle and the machine head connecting body; a plurality of through holes are formed in the bracket body on one side of the feeding ring cavity in a divergent manner; the feeding ring cavity is communicated with the mixing ring cavity through the through hole.

The inner layer shunt body is of an integrated structure; the flow divider consists of a connecting flange and a flow divider body; one end of the shunt body is provided with a connecting flange; the shunt body is a cylinder; the inner hole of the shunt body is communicated with a feed hole A of the shunt shuttle; a material storage ring groove is formed in the circumferential surface of the shunt body; a sealing section is arranged on the circumferential surface of the shunting body at one side of the material storage ring groove; the circumferential surface of the fluid body at the other side of the material storage ring groove is provided with a material limiting section; an inner-layer annular cavity is formed between the material storage ring groove and the support body as well as between the material limiting section and the support body; a feeding hole B is arranged on the bracket body at one side of the inner layer annular cavity.

The plastic extruder A and the plastic extruder B respectively comprise an extrusion cylinder, a hopper and a pushing screw rod; the inside of the extrusion cylinder is provided with a pushing screw through an extrusion motor 48; a hopper is connected to the extruding cylinder above one end of the pushing screw; the outside of the extrusion cylinder is provided with a heating wrapping layer.

The utility model has the advantages that:

the production device of the ratproof silicon core pipe has compact structure and ingenious design, and the ratproof silicon core pipe produced by using the production device has a three-layer structure; the glass fiber contained in the outer layer and the inner layer is smaller, and the glass fiber contained in the middle layer is larger, so that the rat-proof silicon core pipe can keep smooth the outer surface and the inner wall under the condition of ensuring good mechanical property; the rat-proof effect can be ensured, so that the problems of poor rat-proof effect and high production cost existing in the existing rat-proof silicon core tube production technology are solved; the production and use requirements of enterprises are met.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure in the direction A-A in FIG. 1;

fig. 3 is a schematic structural view of the forming mold of the present invention;

FIG. 4 is a schematic structural view of the forming core of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 in the direction D-D;

FIG. 6 is a schematic view of the structure in the direction B-B in FIG. 4;

FIG. 7 is a schematic structural view of the confluence core of the present invention;

FIG. 8 is a schematic view of the structure of FIG. 7 in the direction C-C;

fig. 9 is a schematic structural view of the inner layer fluid splitter of the present invention;

fig. 10 is a schematic structural view of the bracket body of the present invention.

In the figure: 1. a frame; 2. forming a mold; 3. a plastic extruder A; 4. a plastic extruder B; 5. a cooling water tank; 6. a rice-recording printer; 7. a coiler; 8. an extrusion cylinder; 9. a hopper; 10. pushing the screw rod; 11. a confluence core; 12. forming a core; 13. a support body; 14. a seal ring; 15. connecting flanges; 16. an adaptor body; 17. a spreader cone; 18. a shaped body; 19. a breather pipe; 20. a core mold; 21. a neck ring mold; 22. a gland; 23. locking the pull rod; 24. a vent bolt; 25. positioning a pressing plate; 26. forming an annular cavity; 27. an air inlet; 28. a vent hole; 29. an overflowing hole; 30. a handpiece connector; 31. a shunt shuttle; 32. a mold connector; 33. mixing; 34. a stent body; 35. a mixing ring cavity; 36. mixing taper holes; 37. a feed ring cavity; 38. a through hole; 39. a connecting flange; 40. a diverter body; 41. a feed hole A; 42. a sealing section; 43. a material storage ring groove; 44. a material limiting section; 45. an inner annular cavity; 46. a feed hole B; 47. an inner layer shunt; 48. an extrusion motor.

Detailed Description

The production device of the ratproof silicon core pipe comprises a frame 1, a forming die 2, a plastic extruder A3, a plastic extruder B4, a cooling water tank 5, a rice recording printer 6 and a coiler 7 (see the attached figure 1 in the specification).

A forming die 2 (see the attached figure 1 of the specification) is arranged on the frame 1; the molding die 2 is composed of a confluence core 11 and a molding core 12; one end of the confluence core 11 is connected with a forming core 12 (see the description and the attached figure 3); heating wrapping layers (not shown in the attached figures of the specification) are arranged outside the confluence core 11 and the forming core 12; during operation, the heating wrapping layer can heat the confluence core 11 and the forming core 12 to keep the confluence core and the forming core at reasonable temperature, and the problem of plastic solidification when the temperature in the confluence core 11 and the forming core 12 is too low during operation is prevented.

The forming core 12 comprises a sealing ring 14, an engaging flange 15, an engaging body 16, a diversion cone 17, a supporting body 13, a forming body 18, a vent pipe 19, a core die 20, a mouth die 21 and a gland 22 (see the description and the attached figure 4).

One end of the supporting body 13 is fixedly provided with a connecting body 16 through a screw rod; one end of the connecting body 16 is provided with a sealing ring 14; the circumferential surface of one end of the connecting body 16 is connected with a connecting flange 15 in a threaded manner; the forming core 12 is fixedly connected with the confluence core 11 through an engagement flange 15, a seal ring 14 and a screw (see the attached figures 3 and 4 of the specification).

The connecting body 16 is in a cylindrical structure; one end of the supporting body 13 inside the connecting body 16 is provided with a shunting cone 17 (see the description and the attached figure 4); the surface of the shunt cone 17 is of a smooth surface structure; the purpose of so arranging the diverter cone 17 is to: when the surface of the shunting cone 17 is of other structures, the problem that the hot melt is blocked from moving when the surface friction of the shunting cone 17 is large when the hot melt in a hot melt state moves along the surface of the shunting cone 17 is avoided.

The other end of the supporting body 13 is fixedly provided with a forming body 18 through a screw; one end of the forming body 18 is fixedly provided with a mouth mold 21 through a gland 22 and a screw rod; a core mold 20 is fixedly arranged at one end of the forming body 18 in the die 21 (see the description and the attached figure 4); the core mold 20 has a cylindrical structure.

A forming annular cavity 26 is formed between the core die 20 and the mouth die 21; in this way, the hot melt can be shaped into a tube by entering the forming ring cavity 26 and then forming a tube-shaped structure for output.

One end of the forming ring cavity 26 is in a horn-shaped structure (see the attached figure 4 in the specification); the purpose of the forming ring cavity 26 is to: so that the shaping ring chamber 26 forms the purpose that the volume of input section is greater than shaping ring chamber 26 export volume, so firstly at the during operation, can make the hot melt can form the suppress pressure after entering into shaping ring chamber 26, so can ensure that the hot melt can accelerate the output when shaping ring chamber 26 export section is exported, avoided in the shaping ring chamber 26 because of the emergence of the tubular structure "thickness differs" problem of lacking material and leading to the output.

A vent pipe 19 (see the description and the attached figure 4) is arranged inside the core mould 20; one end of the vent pipe 19 is attached to the forming body 18; one end of the vent pipe 19 penetrates through the support body 13 through a locking pull rod 23 and then is fixedly connected with the shunting cone 17; the other end of the vent pipe 19 extends to the port of the core mould 20 and is provided with a positioning pressure plate 25 through a vent bolt 24; the positioning pressing plate 25 is in interference connection with the port of the core mold 20. The purpose of the vent bolts 24 and the positioning pressure plate 25 is to: the outlet end of the vent pipe 19 is positioned by the vent bolt 24 and the positioning pressure plate 25, so that the problem of deviation from the installation position during long-time working is prevented. The vent bolt 24 is provided with a vent hole (not shown in the drawings) in the middle thereof, and the inside of the vent pipe 19 communicates with the outside through the vent hole.

The support body 13 and the forming body 18 are in a disc-shaped structure; the centers of the support body 13 and the molded body 18 are provided with mutually communicating vent holes 28 (see the description, fig. 4, 5 and 6). The vent hole 28 of the molding body 18 is communicated with the central hole of the vent pipe 19; an air inlet hole 27 (see the description and the attached figures 4 and 6) communicated with the outside is arranged on the supporting body 13 on one side of the air vent hole 28.

After the supporting body 13 and the forming body 18 are arranged in this way, when the forming pipe works, the outside atmosphere can be communicated with the inside of the forming pipe through the air inlet hole 27, the vent hole 28, the central hole of the vent pipe 19 and the vent bolt 24; so can make the inside of accomplishing moulding pipeline keep the ordinary pressure and make it keep unanimous with the outside atmospheric pressure of pipeline, so can avoid moulding pipeline inside and outside atmospheric pressure to lead to the emergence of pipeline deformation problem when inconsistent.

A plurality of overflowing holes 29 are divergently arranged on the support body 13 and the forming body 18 around the vent hole 28 (see the attached figures 5 and 6 in the specification); the overflowing hole 29 on the forming body 18 is communicated with the overflowing hole 29 on the supporting body 13 at one end, and is communicated with the forming annular cavity 26 at the other end; the interior of the adaptor body 16 communicates with an overflow aperture 29 in the support body 13 (see figure 4 of the specification). In doing so, the hot melt entering the adapter 16 travels along the flowbore 29 into the forming annulus 26 to complete the pipe forming operation.

The confluence core 11 comprises a machine head connecting body 30, a shunt shuttle 31, an inner layer shunt body 47, a mould connecting body 32, a bracket body 34 and a mixing body 33 (see the attached figure 7 in the specification); the support body 34 is a revolving body structure with a section in a shape like a Chinese character 'tu' (see the attached drawings 7 and 10 in the specification).

A handpiece connecting body 30 (see the description and the attached figure 7) is fixedly arranged at one end of the bracket body 34; the nose connector 30 is in communication with a plastic extruder a 3; the plastic extruder A3 is operated to extrude the hot melt into the core 11 through the nose adapter 30.

A shunt shuttle 31 is fixedly arranged at one end of a bracket body 34 inside the handpiece connecting body 30 (see the attached figure 7 in the specification); a tapered feeding hole A41 is formed in the shunting shuttle 31; a feeding ring cavity 37 in a horn shape is formed between the shunt shuttle 31 and the handpiece connecting body 30 (see the attached figure 7 in the specification); the purpose of thus arranging the diverter shuttle 31 is to: so that when the hot melt enters the handpiece connector 30 with a certain pressure during operation, one part of the hot melt enters the feeding hole A41, and the other part of the hot melt enters the feeding ring cavity 37; thereby achieving the purpose of layering the hot melt entering from the handpiece connector 30. The purpose of setting the feed hole a41 to be "conical" is: with the setting of "the tapered" through feed port A41, make the hot melt enter into its inside back, can have a process of "suppressing pressure" to make the hot melt that gets into the latter half of feed port A41 compacter, avoided the emergence of "lack of material" problem.

An inner layer shunt body 47 is installed inside the bracket body 34 on one side of the shunt shuttle 31 through a screw (see the description and the attached figure 7); the inner layer sub-fluid 47 is of an integrated structure; it is composed of a connecting flange 39 and a splitter body 40 (see figure 9 of the specification).

One end of the flow distribution body 40 is provided with a connecting flange 39; the splitter body 40 is a cylinder; the inner hole of the diverter body 40 is communicated with the feeding hole A41 of the diverter 31 (see the attached figure 7 in the specification).

A material storage ring groove 43 is arranged on the circumferential surface of the shunt body 40; the circumferential surface of the flow distribution body 40 on one side of the storage ring groove 43 is provided with a sealing section 42; the circumferential surface of the splitter body 40 on the other side of the storage ring groove 43 is provided with a material limiting section 44.

The material storage ring groove 43 of the flow distribution body 40 is in arc transitional connection with the material limiting section 44; the purpose of so setting is: so that the hot melt can smoothly flow along the transition surface during working; thereby avoiding the problem of clogging of the transition portion where it is deposited.

An inner layer annular cavity 45 is formed between the material storage ring groove 43 and the material limiting section 44 and the bracket body 34 (see the specification, the attached figure 7); the bracket body 34 on one side of the inner-layer annular cavity 45 is provided with a feed hole B46 (see the description and the attached figures 7, 8 and 10). The feed port B46 is connected with a plastic extruder B4; in operation, the plastic extruder B4 can extrude the hot melt through the feed opening B46 and into the core 11.

The other end of the bracket body 34 is connected with a mixing body 33 (see the specification and the attached figure 7); the mixture 33 is in a ring-shaped structure; a mixing ring cavity 35 is formed between the inner part of the mixing body 33 and the bracket body 34 (see the attached figure 7 in the specification). A plurality of through holes 38 are divergently arranged on the bracket body 34 between the material mixing ring cavity 35 and the material feeding ring cavity 37 (see the attached figures 7 and 8 in the specification). The feed ring chamber 37 communicates with the mixing ring chamber 35 through a through hole 38.

One end of the mixing body 33 is connected with a mould connecting body 32 (see the description and the attached figure 7); a mixing taper hole 36 is arranged inside the die connecting body 32; the mixing ring cavity 35 is communicated with a mixing taper hole 36 (see the attached figure 7 of the specification).

One end of the forming die 2 is connected with a plastic extruder A3; a plastic extruder B4 (see the description attached figures 1 and 2) is connected to one side of the forming die 2; the plastic extruder A3 is communicated with the handpiece connector 30; the plastic extruder B4 is communicated with a feed hole B46 on the confluence core 11.

The plastic extruder A3 and the plastic extruder B4 both comprise an extrusion cylinder 8, a hopper 9 and a pushing screw 10; the inside of the extrusion cylinder 8 is provided with a pushing screw 10 through an extrusion motor 48; a hopper 9 is connected to the extruding cylinder 8 above one end of the pushing screw rod 10; the outside of the extrusion cylinder 8 is provided with a heating wrapping layer. The heating wrapping layer can heat the extrusion cylinder 8, so that the extrusion cylinder 8 can heat the mixture to form a hot melt, and the heating temperature of the heating wrapping layer is controllable.

When the extruding motor 48 works, the pushing screw 10 can be driven to rotate; during the rotation of the pushing screw 10, the mixture falling from the hopper 10 into the extrusion cylinder 8 can be pushed into the confluence core 11.

One side of the frame 1 is provided with a cooling water tank 5, a rice recording printer 6 and a coiler 7 in sequence. The cooling water tank 5, the rice recording printer 6 and the coiler 7 are all outsourcing equipment. The rice-recording printing machine 6 can perform rice-recording printing processing on the finished pipelines, and can print information of production date, finished manufacturers and pipeline length on the surfaces of the pipelines. The coiler 7 can coil the produced pipeline into a coil, so that the pipeline is sold in a coil.

The production method of the ratproof silicon core pipe by using the production device comprises the following steps:

1) preparation of ratproof master batch

The ratproof master batch is prepared from the following raw materials in parts by weight:

PE carrier 120-130 parts of alkali-free glass fiber 75-90 parts

1250 mesh talcum 22-28 parts and SBS 0.8-1.1 parts

3.8-4.5 parts of coupling agent and 1.2-1.8 parts of monoglyceride

1.5-2.2 parts of white oil and 9-11 parts of PVC functional modifier

1.2 to 2.0 portions of hyperbranched modifier

The ratproof master batch is prepared from the following optimal raw materials in parts by weight:

125 parts of PE carrier and 80 parts of alkali-free glass fiber

1250 mesh talcum 25 parts SBS 1 part

Coupling agent 4 parts monoglyceride 1.5 parts

2 parts of white oil and 10 parts of PVC functional modifier

Hyperbranched modifier 1.5 parts

All the raw materials are commercially available products; the PE carrier is provided by Shanxi extended petroleum Yanan energy and chemical responsibility GmbH, and the brand number is 23050;

the alkali-free glass fiber is provided by Wanqian chemicals of Jiangyin, and has the function of improving the electrical insulation, heat resistance, corrosion resistance and mechanical strength of products.

1250 talc powder is provided by the chemical company Oersona, Jiangyun, and serves to significantly improve the rigidity and creep resistance, hardness and surface scratch resistance, heat resistance and heat distortion temperature of the product. SBS is available from Heizhou repulping chemical company, Inc. under type YP816, and is used to improve the impact and deflection properties of the article. The addition proportion is 3-8% of the whole material. The coupling agent is provided by Nanjing Auchini chemical Co., Ltd, and its model number is UP-801, and its function is to improve the interface performance of synthetic resin and inorganic filler or reinforcing material, reduce the viscosity of synthetic resin melt, and improve the dispersity of filler to improve the processing performance, so that the product has good surface quality and mechanical, thermal and electrical properties.

The monoglyceride is provided by daily use auxiliary agent limited company of Shanghai Dong, Jiaxing, and has the effects of good stability, strong dispersibility and good phase-melting property with most resins. The white oil is provided by Zhongxiang Pozurun energy Limited and has the functions of enhancing the viscosity of each group of modified powder and the carrier, so that the modified powder is uniformly adhered to the carrier, and the performance stability of material modification is improved.

The PVC functional modifier is provided by China plastic-in-plastic new material science and technology Hubei company Limited, and the model thereof is XT-PTM, and the function of the PVC functional modifier is to enhance the flexibility of the product.

The hyperbranched modifier is provided by Wuhan hyperbranched resin science and technology Limited company, and the model thereof is HyPer C182, which has the function of increasing the compatibility among the resins.

The production steps of the ratproof master batch are as follows:

putting the alkali-free glass fiber and 1250-mesh talcum powder into a high-speed mixer, and mixing the materials at the rotating speed of 2450 r/min; when the temperature of the materials in the high-speed mixer is higher than 60 ℃, adding the coupling agent, the SBS, the monoglyceride and the hyperbranched modifier in parts by weight, and continuously mixing the materials at the rotating speed of 2450 revolutions per minute; when the temperature in the high-speed mixer reaches 110 ℃, continuously mixing the materials at a rotating speed of 2450 revolutions per minute; the high-speed mixer runs for 3-5 minutes at the rotating speed of 2450 revolutions per minute, the white oil, the PE carrier and the PVC functional modifier are added, and then the high-speed mixer runs for 1-2 minutes at the rotating speed of 2450 revolutions per minute; and transferring the mixed materials in the high-speed mixer into a low-speed mixer, continuously rotating and mixing the mixed materials at the speed of 200 r/min, cooling the mixed materials in the rotating and mixing process of the low-speed mixer, transferring the mixed materials into an internal mixer when the temperature of the materials in the low-speed mixer is reduced to 70 ℃, and then preparing the mixed materials into granular rat-proof master batches with the diameter of 2.5-4mm by the internal mixer in a conventional manner.

The purpose of the ratproof master batch is to: because the alkali-free glass fiber in the rat-proof master batch has high proportion and the alkali-free glass fiber has the characteristic of poor fluidity, if the components in the rat-proof master batch are directly mixed and poured into the plastic extruder B4 for production, the problem that the production quality of the rat-proof silicon core tube is unstable due to uneven mixing of the alkali-free glass fiber is easily caused, and after the components are prepared into granular substances by adopting the mode, the alkali-free glass fiber can be uniformly mixed into the components, so that the problems existing when the components in the rat-proof master batch are directly used for production are solved.

2) Mixing materials;

introducing a certain amount of the ratproof master batch into a hopper 9 of a plastic extruder B4; mixing the ratproof master batch and the PE carrier in a proportion of 1: 3 to form a mixed material, and adding the mixed material into a hopper 9 of a plastic extruder A3; during the operation, the corresponding materials are continuously added into the hopper 9 of the plastic extruder B4 and the hopper 9 of the plastic extruder A3, so that the problem of raw material interruption of the plastic extruder A3 and the plastic extruder B4 is avoided.

3) And hot melting and shaping:

the extrusion motor 48 of the plastic extruder A3 drives the pushing screw 10 to move; the mixed material in the hopper 9 is conveyed backwards in the action process of the pushing screw 10; in the process of backward conveying the mixed materials, the heating wrapping layer in the plastic extruder A3 heats the materials into mixed hot melt, and the mixed hot melt is continuously input into the forming die 2 through the machine head connecting body 30; meanwhile, the extrusion motor 48 in the plastic extruder B4 drives the pushing screw 10 to move; the ratproof master batches in the hopper 9 are conveyed backwards in the action process of the pushing screw 10; in the process of conveying the ratproof master batches backwards, the heating wrapping layer in the plastic extruder B4 heats the materials into ratproof hot melt, and the ratproof hot melt enters the forming die 2 through the feeding hole B46 on the bracket body 34 and is continuously input into the forming die;

after the mixed hot melt enters the machine head connecting body 30, a part of the mixed hot melt enters the material mixing annular cavity 35 through the feeding annular cavity 37 and the through hole 38; the other part of the mixed hot melt enters the inner hole of the inner layer sub-flow body 47 through the feeding hole A41; meanwhile, the ratproof hot melt enters the feeding hole B46 and enters the inner-layer annular cavity 45; thus, when the mixed hot melt output from the inner hole of the inner layer shunt 47, the ratproof hot melt output from the inner layer ring cavity 45 and the mixed hot melt output from the mixing ring cavity 35 are converged in the mixing taper hole 36 in the mold connector 32 to form a hot melt column with the center as the mixed hot melt, the middle layer as the ratproof hot melt and the outer layer as the mixed hot melt; the hot melt column enters the engaging body 16 of the forming core 12 under the action of the subsequent pressure;

after the hot melt column enters the connecting body 16, the hot melt column continuously moves backwards under the action of subsequent pressure; in the backward moving process of the hot melt column, the shunting cone 17 separates the hot melt column from the center; the separated hot melt column flows into the forming annular cavity 26 through the overflowing hole 29 in the supporting body 13 and the forming body 18, and finally forms a forming pipe output under the plastic action of the forming annular cavity 26;

in the above process, the outside atmosphere in the molding core 12 is communicated with the inside of the molding tube through the air inlet hole 27, the air vent hole 28, the center hole of the air vent pipe 19 and the air vent bolt 24; thus, the inside of the forming pipe can be kept at normal pressure to keep the pressure consistent with the air pressure outside the pipeline, and the problem of pipeline deformation caused by inconsistent air pressure inside and outside the forming pipe is avoided;

5) and cooling and shaping:

the molding pipe is output through the molding die 2 and then enters the cooling water tank 5 for cooling and shaping to form the ratproof silicon core pipe;

6) and recording rice and printing:

conveying the ratproof silicon core pipe cooled by the cooling water tank B to a rice-recording printing machine 6, and printing product information marks on the surface of the rice-recording printing machine 6 in the process of guiding the rice-recording printing machine to move forwards;

7) and a traction coil:

the ratproof silicon core pipe printed by the rice-recording printer 6 is coiled into a coil under the action of a coiling machine 7; thus obtaining the marketable rat-proof silicon core pipe.

The production device of the ratproof silicon core pipe has compact structure and ingenious design, and the ratproof silicon core pipe produced by using the production device has a three-layer structure; the glass fiber contained in the outer layer and the inner layer is smaller, and the glass fiber contained in the middle layer is larger, so that the rat-proof silicon core pipe can keep smooth the outer surface and the inner wall under the condition of ensuring good mechanical property; the rat-proof effect can be ensured, so that the problems of poor rat-proof effect and high production cost existing in the existing rat-proof silicon core tube production technology are solved; the production and use requirements of enterprises are met.

The content of the alkali-free glass fiber in the inner layer and the outer layer of the rat-proof silicon core tube produced by adopting the method is 6.9-9.6%, so that the silicon core tube can keep the characteristics of smoothness and small friction coefficient, and can also keep certain rat-proof performance by utilizing the characteristics of poor taste and high hardness of the alkali-free glass fiber; the content of the alkali-free glass fiber in the middle layer of the rat-proof silicon core pipe is as follows: between 27.7% and 38.4%; the middle layer of the rat-proof silicon core pipe contains higher alkali-free glass fiber, although the alkali-free glass fiber has the characteristic of large friction coefficient, the alkali-free glass fiber is positioned in the middle of the rat-proof silicon core pipe and cannot influence the appearance and the inner wall of the rat-proof silicon core pipe, but the content of the alkali-free glass fiber is higher and is far higher than that of the alkali-free glass fiber in the prior art, so that the rat-proof property of the rat-proof silicon core pipe is further strengthened.

To verify the reliability of the application; the applicant detects various indexes of the ratproof silicon core pipe with the wall thickness of 3.6-3.8mm, which is produced by the method, and the detection result is as follows:

compared with the national standard GB/T24456-2009, the indexes can meet the requirements of the national standard.

In order to verify the rat-proof effect of the rat-proof silicon core tube produced by using the method, the following comparative experiment is carried out.

Experimental tools:

20 adult healthy rats; 5 ratproof silicon core tubes which are 40.4mm in outer diameter and 1m in length and are manufactured by the method; 5 common silicon core tubes with the outer diameter of 40.4mm and the length of 1 m; 15 transparent boxes with ventilation function; and a plurality of corns.

The experimental process comprises the following steps:

50 g of corn is put into the interior of a single rat-proof silicon core pipe manufactured by the method, and then two ends of the core pipe are sealed; and the surface of the base plate is uniformly provided with 10 through holes with the diameter of 10mm at intervals; then putting the manufactured ratproof silicon core pipe into a transparent box body, and fixing the ratproof silicon core pipe at the bottom of the transparent box body in a mode that the through hole faces upwards; then 2 mice and a certain amount of water are put into the transparent box body; then 5 groups of devices manufactured by the method are numbered with No. 1-5 to form an experimental group, the conditions of the experimental group are continuously observed for 5 days, and relevant records are made;

50 g of corn is put into the inner part of a single common silicon core pipe, and then the two ends of the corn are sealed; and the surface of the base plate is uniformly provided with 10 through holes with the diameter of 10mm at intervals; then, the manufactured common silicon core tube is used; then putting the manufactured common silicon core pipe into a transparent box body, and fixing the common silicon core pipe at the bottom of the transparent box body in a mode that the through hole faces upwards; then 2 mice and a certain amount of water are put into the transparent box body; then 5 groups of devices manufactured by the method are numbered from 1 to 5 to form a control group, the condition of the control group is observed after 2 days, the condition of the experimental group is observed for 5 days continuously, and relevant records are made.

Two groups of rats in the control group begin to gnaw the silicon core pipes after 1 day, three groups of rats begin to gnaw the silicon core pipes after 2 days, all the common silicon core pipes in the control group are gnawed by the rats after 4 days, and the corns in the common silicon core pipes are completely eaten by the rats.

The rats in the experimental groups had 3 groups of rats which began to gnaw the silicon core pipe after 1 day, two groups of rats began to gnaw the silicon core pipe after 2 days, after 4 days, the surface layers of the silicon core pipes in all the experimental groups had gnawing traces, 4 groups of silicon core pipes were not gnawed by the rats, 1 group of silicon core pipes were gnawed by the rats, and the corns in the silicon core pipes were completely eaten by the rats.

After the detection and the experiment, the rat-proof silicon core pipe produced by the method can meet the use requirement of the national standard and has a good rat-proof effect; the requirements of enterprises are met.

Claims (7)

1. A production device of a ratproof silicon core pipe comprises a frame (1), a forming die (2), a plastic extruder A (3), a plastic extruder B (4), a cooling water tank (5), a rice recording printer (6) and a coiler (7); the method is characterized in that: a forming die (2) is arranged on the frame (1); one end of the forming die (2) is connected with a plastic extruder A (3); one side of the forming die (2) is connected with a plastic extruder B (4); one side of the frame (1) is sequentially provided with a cooling water tank (5), a rice recording printer (6) and a coiler (7).

2. The production device of the ratproof silicon core tube according to claim 1, wherein: the forming die (2) consists of a confluence core (11) and a forming core (12); one end of the confluence core (11) is connected with a forming core (12); heating wrapping layers are arranged outside the confluence core (11) and the forming core (12); the forming core (12) comprises a sealing ring (14), a connecting flange (15), a connecting body (16), a shunt cone (17), a supporting body (13), a forming body (18), a vent pipe (19), a core mold (20), a mouth mold (21) and a gland (22); one end of the support body (13) is fixedly provided with a connecting body (16) through a screw rod; one end of the supporting body (13) in the connecting body (16) is provided with a shunting cone (17); one end of the connecting body (16) is provided with a sealing ring (14); a connecting flange (15) is connected with the circumferential surface of one end of the connecting body (16) in a threaded manner; the forming core (12) is fixedly connected with the confluence core (11) through a connecting flange (15), a sealing ring (14) and a screw rod; the other end of the support body (13) is fixedly provided with a forming body (18) through a screw; one end of the forming body (18) is fixedly provided with a mouth mold (21) through a gland (22) and a screw rod; a core mould (20) is fixedly arranged at one end of the forming body (18) in the mouth mould (21); a vent pipe (19) is arranged in the core mould (20); one end of the vent pipe (19) is attached to the forming body (18); one end of the vent pipe (19) penetrates through the support body (13) through a locking pull rod (23) and then is fixedly connected with the shunting cone (17); the other end of the vent pipe (19) extends to the port of the core mould (20) and is provided with a positioning pressure plate (25) through a vent bolt (24); the positioning pressing plate (25) is connected with the port of the core mold (20) in an abutting mode.

3. The production device of the ratproof silicon core tube as claimed in claim 2, wherein: the core mold (20) is of a cylindrical structure; a forming annular cavity (26) is formed between the core die (20) and the mouth die (21); one end of the molding ring cavity (26) is of a horn-shaped structure; the supporting body (13) and the forming body (18) are both in a disc-shaped structure; the centers of the support body (13) and the forming body (18) are provided with vent holes (28) which are communicated with each other; the vent hole (28) of the forming body (18) is communicated with the central hole of the vent pipe (19); an air inlet (27) communicated with the outside is arranged on the support body (13) at one side of the vent hole (28); a plurality of overflowing holes (29) are arranged on the support body (13) and the forming body (18) around the vent hole (28) in a divergent manner; one end of an overflowing hole (29) on the forming body (18) is communicated with the overflowing hole (29) on the supporting body (13), and the other end of the overflowing hole is communicated with the forming annular cavity (26); the connecting body (16) is of a cylindrical structure, and the interior of the connecting body (16) is communicated with the overflowing hole (29) in the support body (13).

4. The production device of the ratproof silicon core tube as claimed in claim 3, wherein: the confluence core (11) comprises a machine head connecting body (30), a shunting shuttle (31), an inner layer shunting body (47), a mould connecting body (32), a bracket body (34) and a mixture body (33); a nose connecting body (30) is fixedly arranged at one end of the bracket body (34); the machine head connecting body (30) is communicated with the plastic extruder A (3); a shunt shuttle (31) is fixedly arranged at one end of a bracket body (34) in the handpiece connecting body (30); an inner layer shunt body (47) is arranged in the bracket body (34) at one side of the shunt shuttle (31) through a screw; the other end of the bracket body (34) is sequentially connected with a mixing body (33) and a mould connecting body (32); the confluence core (11) is fixedly connected with the forming core (12) through a mould connecting body (32).

5. The production device of the ratproof silicon core tube as claimed in claim 4, wherein: the bracket body (34) is of a revolving body structure with a convex cross section; the mixture (33) is in a circular ring-shaped structure; a mixing ring cavity (35) is formed between the inner part of the mixing body (33) and the support body (34); a mixing taper hole (36) is arranged in the die connecting body (32); the mixing ring cavity (35) is communicated with the mixing taper hole (36); a tapered feeding hole A (41) is formed in the shunting shuttle (31); a feeding ring cavity (37) in a horn shape is formed between the shunting shuttle (31) and the handpiece connecting body (30); a plurality of through holes (38) are arranged on the bracket body (34) at one side of the feeding ring cavity (37) in a divergent shape; the feeding ring cavity (37) is communicated with the mixing ring cavity (35) through a through hole (38).

6. The production device of the ratproof silicon core tube as claimed in claim 5, wherein: the inner-layer flow distribution body (47) is of an integrated structure; the flow distribution device is composed of a connecting flange (39) and a flow distribution body (40); one end of the flow dividing body (40) is provided with a connecting flange (39); the flow distribution body (40) is a cylinder; the inner hole of the shunt body (40) is communicated with a feed hole A (41) of the shunt shuttle (31); a material storage ring groove (43) is arranged on the circumferential surface of the flow dividing body (40); a sealing section (42) is arranged on the circumferential surface of the flow distribution body (40) at one side of the material storage ring groove (43); a material limiting section (44) is arranged on the circumferential surface of the flow dividing body (40) on the other side of the material storage ring groove (43); an inner-layer annular cavity (45) is formed between the material storage ring groove (43) and the material limiting section (44) and the bracket body (34); a feed hole B (46) is arranged on the bracket body (34) at one side of the inner layer annular cavity (45).

7. The production device of the ratproof silicon core tube according to claim 1, wherein: the plastic extruder A (3) and the plastic extruder B (4) both comprise an extrusion cylinder (8), a hopper (9) and a pushing screw (10); a pushing screw (10) is arranged in the extrusion cylinder (8) through an extrusion motor (48); a hopper (9) is connected to the extruding cylinder (8) above one end of the pushing screw (10); the outside of the extrusion cylinder (8) is provided with a heating wrapping layer.

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