CN117864323A - Bamboo-joint functional bionic pipe and manufacturing method thereof - Google Patents

Abstract

The invention discloses a bamboo-joint functional bionic pipe and a manufacturing method thereof, wherein the bamboo-joint functional bionic pipe is made by a method of separating plastic pipes by sections with internal partitions, the internal partitions are formed by injection molding, the internal partitions are embedded in the plastic pipes at a distance, the outer diameter of the internal partitions is the same as the inner diameter of the plastic pipes, the internal partitions are spoke structures, the outer section of which is a small section of a circular pipe, a reinforcing rib support ring is arranged in the middle of the circular pipe, and a one-way valve is arranged near the center of the internal partition. The bamboo-joint functional bionic pipe of the invention adopts extrusion molding as the main manufacturing method, the production line includes a production line host, a bamboo-joint functional bionic pipe cooling system, a traction system and a cutting system, the production line is basically the same as the existing plastic pipe production line, and the functions of installing, inflating and pressing the internal partitions are added, the production line host adopts a composite flow channel technology, which is conducive to the pushing and placement of the internal partitions and rapid inflation; there is enough space to complete the installation of the internal partitions.

Description

Bamboo-joint functional bionic pipe and manufacturing method thereof

Technical Field

The invention belongs to the field of plastic pipes and their manufacturing, and particularly relates to bamboo-joint functional bionic pipes and their manufacturing method.

Background technique

A bamboo tube is a type of tube made in the shape of bamboo. Most of the existing bamboo tubes are used in the field of decoration. For example, the bamboo tube of Patent 202130147796.4 looks like bamboo, has protrusions on the outer wall, and its inner cavity is a connected through hole. However, high-performance and multifunctional plastic pipe products used in fields such as floating bodies of water surface engineering require that the inner cavity is segmented and closed. The constructed appendage can float on the water surface because the inner cavity of the tube is a segmented cavity. If a certain section is damaged, it will not have much effect on the buoyancy. Based on this demand, it is necessary to invent a bamboo-joint functional bionic tube that can imitate the effect of the segmented closure of the inner cavity of bamboo.

In addition, there is an extrusion molding method in the existing bionic tube manufacturing method. For example, Patent 96207605 proposes a bamboo tube extruder, which is mainly composed of parallel pulleys on both sides of the upper end of a frame, and a movable seat is arranged at the end of the slide rail. A lower mold body and an upper mold body that matches the lower mold body are arranged on the movable seat, and semicircular molding grooves are arranged in the upper and lower mold bodies respectively, and an air source pipe is also provided for air supply. The mold and suction are used to generate protrusions on the extruded tube to form bamboo nodes. This device cannot produce tubes with closed functional structures. There are also methods that heat the ends of a certain length of the manufactured tube and then connect them to form a tube with bamboo nodes on the outer wall, but the inner wall is a continuous cavity.

Summary of the invention

The purpose of the present invention is to innovate a high-performance and multifunctional plastic pipe product for use in the fields of water surface engineering floats, etc., to solve the high-risk short life problem of existing pipeline floats that will cause overall failure due to local leakage; at the same time, a composite molding processing method that combines extrusion molding with injection molding and online assembly opens up a new way for the design and intelligent manufacturing of complex pipeline structures, improves the ring stiffness of pipes and promotes their functional development.

The technical solution of the present application is: bamboo-joint functional bionic pipes are made by separating plastic pipes into sections with internal partitions. The internal space of the pipe forms sealed spaces. When any one or more of the spaces are damaged, other spaces will not be greatly affected. The outer wall of the plastic pipe is smooth, which is convenient for cooling and shaping during extrusion molding. The internal partitions are formed by injection molding. The internal partitions are embedded in the plastic pipe at a certain distance. The outer diameter of the internal partition is the same as the inner diameter of the plastic pipe, or embedded in the inner diameter of the plastic pipe. The outer end of the internal partition is a small section of round pipe, which is convenient for support and guidance during installation. Inside the round pipe is a disc with a rib plate, and at the center are symmetrical pipe sections. The middle of the pipe section is closed and has a certain rigidity to withstand the push-in force during processing.

The bamboo-joint functional bionic pipe of the present invention can use a large amount of recycled plastic as the main material for the plastic pipe and the internal partition, and the cost of raw materials can be greatly reduced. The bamboo-joint plastic pipe can be black, has strong weather resistance and long service life. In addition, the bamboo-joint plastic pipe has better strength and rigidity.

The bamboo joint functional bionic pipe of the present invention has an internal partition of a spoke structure, and its outer end is a small section of circular pipe, and a supporting ring with reinforcing ribs is arranged in the middle of the circular pipe, and a symmetrical pipe section is arranged in the center. A spring bracket is arranged in the pipe section near the center of the internal partition, and a spring is arranged in the spring bracket. There is a ball at the head of the spring. The spring with the ball is equivalent to a one-way valve. The main function of the one-way valve is to quickly fill the inner pipe with compressed air at the moment when the partition is placed and pressed during the continuous production of the bamboo joint pipe, so as to ensure that the air pressure of the space separated by the pipe is greater than the atmospheric pressure, and when the pipe is cooled to room temperature, the air pressure inside and outside the pipe is basically the same, so as to prevent the pipe from being slightly deformed during the production process. With the one-way valve, the pipe can be inflated after the internal partition is installed during the manufacture of the pipe, so as to ensure that the outer wall of the pipe is smooth. The manufactured pipe has a chamber separated by an internal partition, which is similar to bamboo, but it looks like a smooth pipe from the appearance, which is convenient for building floating boards and other applications.

The main body of the internal partition is made of plastic and has a one-way inflation valve. The physical properties of the plastic materials of the partition and the one-way valve are basically the same, which facilitates continuous and stable production. The appearance color of the partition and the one-way valve is basically the same as the appearance color of the plastic pipe, which is conducive to recycling and utilization in production.

The manufacturing accuracy of the one-way inflation valve meets the technical requirements of continuous production. It can be made by machining plastic round bars. When the product batch is large, it can be made by precision injection molding. Plastic springs and plastic balls are made by precision injection molding.

The bamboo-joint functional bionic pipe of the present invention adopts an extrusion molding manufacturing method. The production line includes a main machine, a cooling and shaping system, a traction system and a cutting system. The main machine, the cooling and shaping system, the traction system and the cutting system are arranged in sequence. The main technical features of the main machine of the production line are as follows: the heating of the extruder and the molding head can adopt an electromagnetic induction heater, which is energy-saving and efficient; the existing conventional electric heating technology can also be adopted. The main motor of the extruder adopts a high-power servo motor, which is energy-saving and efficient; the commonly used DC motor drive technology can also be adopted. The extruder can also adopt a commonly used extruder. The electrical control adopts a PLC+touch screen mode to realize intelligent control. The production line is basically the same as the existing plastic pipe production line in terms of operation mode, and the molding head is added with the functions of installing, inflating, and pressing the internal partition.

The main technical features of the molding head: the composite flow channel technology combining multiple flow channels is adopted, which makes the molten plastic extrusion more uniform and the distribution better, which is conducive to the improvement of the formula in production; the annular head design and the side feeding technology are conducive to the pushing and placement of the internal partition and rapid inflation; the molding head adopts an annular design, with enough space inside to complete the installation of the internal partition, and the constant temperature process of the internal partition is achieved by using the heat of the annular molding head, and the relevant technical requirements are met by controlling the placement time and position.

The method for manufacturing bamboo-joint functional bionic pipes of the present invention is as follows: the first step is to preheat the extruder barrel and the molding head, and place the prefabricated internal partition on the tooling of the molding head composited with the plastic pipe and the internal partition; the second step is to start the extruder to extrude the pipe after the preheating reaches the temperature, and start the cooling and shaping system, the traction system and the cutting system; the third step is to start the internal partition insertion device after the pipe extrusion is qualified and stable, and the temperature of the internal partition is controlled to about 95-120°C. If the temperature is too low, it is not conducive to the bonding of the outer wall of the internal partition and the inner wall of the plastic pipe; if the temperature is too high, the rigidity of the internal partition is reduced, which is not conducive to pushing the internal partition into the plastic pipe. The melting point of the plastic of the outer end pipe section of the internal partition is close to or higher than the melting point of the plastic pipe material, preferably slightly higher than the melting point of the plastic pipe material. In addition, after the internal partition is installed in place, there is a clamping device to ensure the tight combination of the internal partition and the pipeline, and quickly inflate the space in front of the internal partition in one direction to ensure that the pipeline is less deformed; the fourth step is to insert the internal partition in a cycle according to the requirements of the bamboo interval, and then cool, pull and cut. The clamping device has a follow-up function and can move with the production of the bamboo pipeline.

The beneficial effects of the bamboo-joint functional bionic pipe of the present invention are as follows: the chambers inside the bamboo-joint pipe can be completely isolated, so as to play a dual role of ensuring safety and improving the ring stiffness of the pipe similar to the floating body of a watertight compartment of a ship; the chambers can also be connected, mainly playing a role of enhancing the ring stiffness of the pipe; by adopting measures such as fiber reinforcement of longitudinal long fibers in the pipe structure design to reduce the pipe wall thickness, it is possible to achieve the improvement and expansion of the pipe performance while not increasing the amount of bamboo-joint bionic pipe material.

The beneficial effects of the bamboo-joint functional bionic pipe manufacturing method of the present invention are: the internal partition plate arranged on the forming machine head can realize intelligent production, the entire production process can be intelligently controlled, the spacing between the bamboo joints is adjustable, and production can be convenient even when used for various special-shaped bamboo-joint pipes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a bamboo-joint functional bionic pipe according to the present invention;

FIG2 is a schematic diagram of the internal partition structure of the bamboo-joint functional bionic pipe of the present invention;

FIG3 is a schematic diagram of the main machine of the bamboo-joint functional bionic pipe production line of the present invention when viewed from the front;

FIG. 4 is a schematic diagram of the reverse side of the main machine of the bamboo-joint functional bionic pipe production line of the present invention.

In the figure: 1-plastic pipe, 2-internal partition, 2-1-round pipe, 2-2-ring with reinforcing ribs, 2-3-disc 2-4-spring with ball head, 2-5 spring mounting frame, 2-6-clamping structure, 3-extruder transmission system, 4-hopper, 5-barrel, 6-melt transition block, 7-molding head, 8-control cabinet, 9-frame, 10-extruder barrel bracket, 11-lower clamping block, 12-upper clamping block.

Detailed ways

The present invention proposes a bamboo-joint functional bionic pipe, as shown in FIG1 , which is composed of a plastic pipe 1 and an internal partition 2. The outer wall of the plastic pipe 1 is smooth, which is convenient for cooling and shaping during extrusion molding. Before the plastic pipe is manufactured, the internal partition 2 is first manufactured by injection molding, and is embedded in the interior of the plastic pipe 1 during the molding process of the plastic pipe 1. The outer diameter of the internal partition 2 is the same as the inner diameter of the plastic pipe 1. Since the temperature of the plastic pipe 1 is relatively high, the outer wall of the internal partition 2 is bonded to the inner wall of the plastic pipe 1 after insertion, and the plastic pipe 1 is divided into a plurality of closed cavities. The outer end of the internal partition 2 is a small section of a circular tube 2-1, and inside the circular tube 2-1 is a disc 2-2 with a rib plate.

The present invention provides a bamboo-joint functional bionic pipe. The internal partition 2 is used to separate the air in the cavity for easy manufacturing. The internal partition 2 is composed of a round tube 2-1, a ring 2-2 with reinforcing ribs, a disc 2-3, a spring 2-4 with a ball head, a spring mounting frame 2-5 and a clamping structure 2-6. As shown in FIG2 , the spring 2-4 with a ball head and the spring mounting frame 2-5 form a one-way valve.

The present invention discloses a bamboo-joint functional bionic pipe. A plurality of sawtooth grooves are processed on the outer diameter of a circular tube 2-1 of an internal partition 2. After the internal partition 2 is embedded in a plastic pipe 1, the melt on the inner wall of the plastic pipe 1 is squeezed into the sawtooth grooves of the circular tube 2-1, so that the internal partition 2 and the plastic pipe 1 are more tightly combined, thereby preventing the internal partition 2 from sliding along the axial direction during use.

The bamboo production line of the bamboo joint functional bionic pipe of the present invention comprises a production line main machine, a bamboo joint functional bionic pipe cooling and shaping system, a traction system and a cutting system. The production line main machine, the bamboo joint functional bionic pipe cooling system, the traction system and the cutting system are arranged in sequence. The pipe cooling system adopts spray cooling, the traction system adopts a crawler traction machine, and the cutting system adopts a cutting machine with an electric saw. The working parameters of the cooling system, the traction system and the cutting system are determined according to the production speed of the production line main machine.

The main machine of the production line is shown in Figures 3 and 4, and includes an extruder transmission system 3, a hopper 4, a barrel 5, a melt transition block 6, a molding head 7 for compounding plastic pipes and internal partitions, a control cabinet 8, a frame 9, an extruder barrel support 10, a lower clamping block 11 and an upper clamping block 12. The raw material of the plastic pipe is added to the barrel 5 through the hopper 4, and the screw in the barrel 5 rotates under the control of the extruder transmission system 3. The plasticized plastic raw material is extruded and formed through the molding head 7. The frame 9 is used to support the main machine of the production line, and the extruder barrel support 10 is supported on the barrel 5. The processing temperature, screw speed and internal partition installation parameters are set through the control cabinet 8. The main machine of the production line is basically the same as the main machine of the existing plastic pipe production line. The molding head 7 is added with the functions of installing, inflating, and pressing the internal partition. The lower clamping block 11 and the upper clamping block 12 can move with the plastic pipe where the internal partition 2 is installed, so that the internal partition 2 and the plastic pipe 1 are solidified more firmly.

The installation of the internal partition 2 is carried out by conveying an air cylinder which can realize precise control of the stroke. The piston rod end of the air cylinder is equipped with a partition clamp with pneumatic fingers, a quick inflation mechanism which can be telescopically controlled, and a roller structure which can realize smooth operation. The partition clamp with pneumatic fingers clamps the clamping structure 2-6 of the internal partition 2 to ensure the completion of the installation, inflation and other processes of the partition.

Example 1: Main technical parameters of the main machine of the pipeline equipment production line:

High-efficiency extruder: one set, main motor power: 132KW;

Screw diameter: φ120, aspect ratio: 32:1;

Theoretical extrusion capacity of extruder: 350-420kg/h;

·Outer diameter of bamboo pipe: 400mm. Length: 24m;

·Bamboo node spacing: 1800～3600mm;

Host power: 200~220KW;

Equipment center height: 1000mm.

The manufacturing method of the bamboo-joint functional bionic pipe of the present invention is as follows: the first step is to preheat the extruder barrel and the molding head, and place the pre-manufactured internal partition on the tooling of the molding head 7 which is a composite of the plastic pipe and the internal partition; the second step is to start the extruder to extrude the pipe after the preheating reaches the temperature, and start the cooling and shaping system, the traction system and the cutting system to guide the pipe; the third step is to start the internal partition insertion device after the pipe is extruded and is qualified and stable, and the temperature of the internal partition is controlled to about 95-120°C. After the internal partition is installed in place, a clamping device with a follower mechanism is used to ensure that the internal partition is tightly combined with the pipe, and the space in front of the internal partition is quickly and unidirectionally inflated to ensure that the pipe is less deformed; the fourth step is to insert the internal partition in a cycle according to the requirements of the bamboo-joint spacing, and then cool, tug and cut, so as to realize the continuous manufacturing of the bamboo-joint functional bionic pipe.

Claims (9)

1. Bamboo functional bionic pipe, characterized in that: it is made of plastic pipes separated by internal partitions, the internal space of the plastic pipes forms sealed spaces, the outer wall of the plastic pipe is smooth, the internal partitions are embedded in the plastic pipes at a certain distance, the outer diameter of the internal partitions is the same as the inner diameter of the plastic pipe, or embedded in the inner diameter of the plastic pipe, the outer end of the internal partition is a small section of circular tube, the inside of the circular tube is a disc with ribs, the center is a symmetrical pipe section, and the middle of the pipe section is closed. 2. The bamboo-joint functional bionic pipe according to claim 1 is characterized in that the plastic pipe and the internal partition are made of recycled plastic as the main material, and the plastic pipe is black. 3. The bamboo functional bionic tubing according to claim 1 is characterized in that: the internal partition is a spoke structure, the outer end of which is a small section of circular tube, a supporting ring with reinforcing ribs is arranged in the middle of the circular tube, and a symmetrical pipe section is at the center. A spring bracket is arranged in the pipe section close to the center of the internal partition, and there is a spring in the spring bracket, and there is a ball at the head of the spring. The spring with the ball is equivalent to a one-way valve. 4. The bamboo functional bionic pipe according to claim 3 is characterized in that the internal partition body is made of plastic and has a one-way inflation valve, the physical properties of the plastic material of the partition and the one-way valve are the same, and the appearance color of the partition and the one-way valve is the same as the appearance color of the plastic pipe. 5. The bamboo-joint functional bionic pipe according to claim 3 is characterized in that the one-way inflation valve is made by machining plastic round bars or by precision injection molding, and the plastic spring and plastic ball are made by precision injection molding. 6. A method for manufacturing bamboo-joint functional bionic pipes, wherein the production line comprises a main machine, a cooling and shaping system, a traction system and a cutting system, which are arranged in sequence. The main technical features of the main machine of the production line are as follows: the extruder and the molding head are heated by an electromagnetic induction heater, the main motor of the extruder adopts a high-power servo motor or a DC motor drive technology, and the electrical control adopts a PLC+touch screen mode. The production line is basically the same as the existing plastic pipe production line in terms of operation mode, and the molding head is added with the installation, inflation and compression functions of the internal partition; the manufacturing method of the bamboo-joint functional bionic pipes according to claim 3 is characterized in that: the first step is to preheat the extruder barrel and the molding head, and to pre-prepare the The manufactured internal partition is placed on the tooling of the molding machine head that is composited with the plastic pipe and the internal partition; the second step is to start the extruder to extrude the pipe after preheating to the temperature, and start the cooling and shaping system, the traction system and the cutting system; the third step is to start the internal partition insertion device after the pipe extrusion is qualified and stable, and the temperature of the internal partition is controlled to 95-120°C. After the internal partition is installed in place, it has a clamping device to ensure the tight combination of the internal partition and the plastic pipe, and quickly inflate the space in front of the internal partition in one direction; the fourth step is to insert the internal partition in a cycle according to the requirements of the bamboo node spacing, and then cool, pull and cut; the clamping device has a follow-up function, which can move with the production of the bamboo node pipe. 7. The method for manufacturing bamboo functional bionic pipes according to claim 6 is characterized in that: the molding head adopts a composite flow channel technology combining multiple flow channels and a side feeding technology, which is conducive to the pushing and placement of internal partitions and rapid inflation; the molding head adopts a ring-shaped design, and there is enough space inside to complete the installation of internal partitions. 8. The method for manufacturing the bamboo-joint functional bionic pipe according to claim 6, characterized in that the melting point of the plastic of the round tube at the outer end of the internal partition is close to or higher than the melting point of the plastic pipe material. 9. The method for manufacturing bamboo functional bionic pipes according to claim 6 is characterized in that: the installation of the internal partition is carried out by conveying an air cylinder that can realize precise control of the stroke, the piston rod end of the cylinder is equipped with a partition clamp with pneumatic fingers and a quick inflation mechanism that can be telescopically controlled, and a roller structure that can achieve smooth operation, the central pipe section of the internal partition is provided with a clamping structure, and the partition clamp with pneumatic fingers clamps the clamping structure of the internal partition to ensure the completion of the installation and inflation process of the partition.