CN110843184A

CN110843184A - Antibacterial plastic drainage tube preparation equipment and method thereof

Info

Publication number: CN110843184A
Application number: CN201911035347.9A
Authority: CN
Inventors: 黄兴元; 罗成; 刘同科
Original assignee: Lattice Power Jiangxi Corp
Current assignee: Lattice Power Jiangxi Corp; Nanchang University
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-02-28

Abstract

The invention relates to a preparation device and a preparation method of an antibacterial plastic drainage tube, which are applied to a medical drainage plastic microtube, wherein a surface layer film with a sterilization function is formed on the inner surface and the outer surface of the tube during preparation, and the device comprises an extruder, a neck mold, a sterilization dosing system and the like. The plastic is added into an extruder from a hopper, is conveyed, plasticized and melted under the action of an extruder screw and then enters a die from an extruder head, and the sterilization liquid is introduced into the inner wall surface and the outer wall surface of a pipe to form a surface film layer with a sterilization function while the extrusion of the plastic drainage pipe in the die is realized.

Description

Antibacterial plastic drainage tube preparation equipment and method thereof

Technical Field

The invention relates to the technical field of medical drainage tubes, in particular to antibacterial plastic drainage tube preparation equipment, and a method and equipment thereof.

Background

The medical drainage tube is increasingly widely applied in modern medical diagnosis and treatment, but the common drainage tube has no antibacterial and bactericidal effect in the using process, and bacterial infection is easily caused after long-term use.

At present, the antibacterial drainage tube is mainly prepared by adding a sterilizing material into a drainage tube material, the sterilizing material is added into the raw material of the tube material, the using amount of the sterilizing material is large, the production cost is high, and the introduction of the sterilizing material possibly influences the rheological property during the forming of the drainage tube and the mechanical property after the forming.

Disclosure of Invention

Technical problem to be solved

The invention aims to overcome the defects of the prior art and provides an antibacterial plastic drainage tube preparation device and an antibacterial plastic drainage tube preparation method.

(II) technical scheme

The invention aims to provide a preparation method and equipment of an antibacterial plastic drainage tube.

In order to achieve the purpose, the invention adopts the following technical scheme: the method comprises the following steps that plastic raw materials of a plastic drainage tube are added into an extruder from a feeding hopper, plastic enters an opening die from a machine head through conveying, melting and extrusion under the action of a screw, the drainage tube with the required size is formed in the opening die, a proportioned sterilization material is introduced into the opening die through a pressure pump, an inner liquid storage chamber and an outer liquid storage chamber are arranged in the opening die, a tiny inner membrane liquid inlet gap is formed in the end part of the inner liquid storage chamber, the sterilization liquid enters the inner wall of the opening die from the inner liquid storage chamber through the inner membrane liquid inlet gap, and a sterilization film layer formed by the sterilization material is formed on the inner wall of the tube; the end of the outer liquid storage chamber is provided with a tiny outer membrane liquid inlet gap, the sterilizing liquid enters the outer wall of the pipe in the mold from the outer liquid storage chamber through the outer membrane liquid inlet gap, and a sterilizing film layer made of sterilizing materials is formed on the outer wall of the pipe. Because the drainage tube is in a molten state, the sterilization film layer is firmly bonded on the inner wall and the outer wall of the tube, and the sterilization film layer can not be damaged after leaving the neck mold and being processed by the tube processing procedures of cooling, sizing and the like.

An antibacterial plastic drainage tube preparation device, wherein: the extruder power system is fixedly connected with the extruder screw, a heater is arranged outside the extruder screw, one end of the extruder is provided with a feeding hopper, the other end of the extruder is provided with a machine head, the machine head is fixedly connected with a mouth mold interface at one side of a mouth mold, an inner film sterilizing liquid interface at the top of the mouth mold and an outer film sterilizing liquid interface at the bottom of the side face are both connected with a liquid storage tank through pipelines, the middle part of the pipeline is provided with a pressure pump, the middle part of a mouth mold top plate is provided with a mouth mold inner sleeve and a mouth mold outer sleeve respectively, a polymer melt flow channel in the mouth mold without an air film is formed between the mouth mold outer sleeve and the mouth mold inner sleeve, a polymer melt flow channel in the mouth mold with the air film is formed between the inner wall of the mouth mold and the outer wall of the mouth mold, the sealing gasket is arranged at the connecting part, so that the inner wall of the neck ring die and the inner sleeve of the neck ring die form an inner sterilizing liquid storage chamber, the inner sterilizing liquid storage chamber is communicated with the sterilizing liquid interface of the inner film through the middle channel, the outer wall of the neck ring die, the neck ring die outer sleeve and the sterilizing film inlet section form an outer sterilizing liquid storage chamber, and the outer sterilizing liquid storage chamber is communicated with the sterilizing liquid interface of the outer film.

(III) advantageous effects

The invention has the advantages that: the invention can prepare the drainage tube with the sterilization film layer quickly and efficiently, because the sterilization material is only arranged in the film layer on the surface of the drainage tube, compared with the prior art, the invention overcomes the defects of high economic cost and influence on the physical and mechanical properties of the drainage tube caused by overlarge use amount of the sterilization material in the whole tube, and simultaneously, because the sterilization film layer is formed by the tube in a melting state when the drainage tube is formed, the sterilization film layer is firmly connected with the drainage tube, the cost is low, the production efficiency is high, and the defects of low production efficiency and infirm combination of the tube when some sterilization medicines are coated on the surface of the drainage tube are overcome.

Drawings

FIG. 1 is a system diagram for preparing an antibacterial drainage tube; in the figure, 1-an extruder power system, 2-a neck mold, 3-a loading hopper, 4-a heater, 5-a nose, 6-an extruder screw, 7-a pipeline, 8-a liquid storage tank and 9-a pressure pump.

FIG. 2 is a schematic structural view of the die; in the figure, a port 2-1, a temperature sensor 2-2, an intermediate channel 2-3, a flow channel 2-4 without an air film, a sterilizing liquid interface 2-5 of an outer die, a sterilizing film 2-6, an inlet die section, a sterilizing liquid storage chamber 2-7 of the outer die, an outer wall 2-8 of the port die, a sterilizing liquid storage chamber 2-9 of the inner die, an inner wall 2-10 of the port die, a flow channel 2-11 with an air film, a first sealing gasket 2-12, a second sealing gasket 2-13, an outer film liquid inlet gap 2-14, an inner film liquid inlet gap 2-15, an inner sleeve 2-16, an outer sleeve 2-17 of the port die, a top plate 2-18 of the port die and a sterilizing liquid interface 2-.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention relates to a preparation method and equipment of an antibacterial plastic drainage tube, which are shown in figure 1, and structurally comprise 1-an extruder power system, a 2-port mould, a 3-charging hopper, a 4-heater, a 5-machine head, a 6-extruder screw, a 7-pipeline, an 8-liquid storage tank and a 9-booster pump, wherein the detailed structure of the 2-port mould is shown in figure 2 and comprises a 2-1 port mould interface, a 2-2 temperature sensor interface, a 2-3 middle channel, a 2-4 air film-free flow channel, a 2-5 outer film sterilizing liquid inlet, a 2-6 sterilizing film inlet mould section, a 2-7 outer sterilizing liquid storage chamber, a 2-8 port mould outer wall, a 2-9 inner sterilizing liquid storage chamber, a 2-10 port mould inner wall, a 2-11 air film-containing flow channel and a 2-12 sealing gasket I, 2-13 sealing gasket II, 2-14 outer film liquid inlet gap, 2-15 inner film liquid inlet gap, 2-16 die inner sleeve, 2-17 die outer sleeve, 2-18 die top plate and 2-19 inner film sterilizing liquid interface. The plastic raw material is added by a feeding hopper 3, an extruder power system 1 drives an extruder screw 6 to rotate and is conveyed under the action of the extruder screw 6, the plastic is extruded into a neck ring die 2 from a head 5 after being melted due to the friction of the screw and the action of a heater 4, a melt is extruded in a runner between an outer neck ring die sleeve 2-17 and an inner neck ring die sleeve 2-16 without an air film, meanwhile, sterilizing liquid enters an outer sterilizing liquid storage chamber 2-7 through an outer mold sterilizing liquid interface 2-5 and an inner sterilizing liquid storage chamber 2-9 through an inner film sterilizing liquid interface 2-19 respectively along a pipeline 7 under the action of a pressure pump 9 from a liquid storage tank 8, sterilizing materials in the outer sterilizing liquid storage chamber 2-7 enter through an outer film liquid inlet gap 2-14, a sterilizing liquid film layer is formed on the outer wall of a pipe of the runner 2-11 in the presence of the air film, and sterilizing materials in the inner sterilizing liquid storage chamber 2-9 enter through an inner film, when an air film exists, a sterilization liquid film layer is formed on the inner wall of the pipe of the flow passage 2-11, the sterilization liquid film layer is sealed to prevent the liquid medicine from leaking outwards due to the pressure of the liquid medicine, and a sealing gasket II and a sealing gasket I are respectively arranged between the sterilization film inlet die section 2-6 and the die outer sleeve 2-17 as well as between the sterilization film inlet die section 2-8 and the die outer sleeve 2-8 for sealing. Because the plastic of the pipe body is in a molten state when the sterilization liquid film layer is formed, firm and stable sterilization liquid film layers can be formed on the inner wall and the outer wall of the pipe.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An antibacterial plastic drainage tube preparation device and a method thereof are characterized in that: the preparation method comprises the steps of forming a sterilization film layer on the inner surface and the outer surface of the plastic drainage tube while the plastic drainage tube is subjected to extrusion molding, wherein the equipment comprises an extruder, a mouth mold (2) and a sterilization liquid adding system, the extruder is a single-screw or double-screw extruder and comprises an extruder power system (1), a feeding hopper (3), an extruder screw (6), a heater (4) and a machine head (5), the extruder power system (1) is fixedly connected with the extruder screw (6), the heater (4) is arranged outside the extruder screw (6), one end of the extruder is provided with the feeding hopper (3), the other end of the extruder is provided with the machine head (5), and the machine head (5) is fixedly connected with a mouth mold interface (2-1) on one side of the mouth mold (2); the mouth mold (2) comprises a mouth mold interface (2-1), a temperature sensor interface (2-2), an intermediate channel (2-3), an air film-free time flow channel (2-4), an outer mold sterilization liquid interface (2-5), a sterilization film inlet mold section (2-6), an outer sterilization liquid storage chamber (2-7), a mouth mold outer wall (2-8), an inner sterilization liquid storage chamber (2-9), a mouth mold inner wall (2-10), an air film-containing time flow channel (2-11), a sealing gasket I (2-12), a sealing gasket II (2-13), an outer membrane liquid inlet gap (2-14), an inner membrane liquid inlet gap (2-15), a mouth mold inner sleeve (2-16), a mouth mold outer sleeve (2-17), a mouth mold top plate (2-18) and an inner membrane sterilization liquid interface (2-19), an inner membrane sterilization liquid interface (2-19) is arranged in the middle of the neck ring mold top plate (2-18), the inner membrane sterilization liquid interface (2-19) is communicated with the inner sterilization liquid storage chamber (2-9) through a middle channel (2-3), the middle of the neck ring mold (2) is respectively provided with a neck ring mold inner sleeve (2-16) and a neck ring mold outer sleeve (2-17), an air film-free time flow channel (2-4) in the neck ring mold (2) is formed between the neck ring mold inner sleeve (2-16) and the neck ring mold outer sleeve (2-17), an air film-containing time flow channel (2-11) in the neck ring mold (2) is formed between the neck ring mold outer wall (2-8) and the neck ring mold inner sleeve (2-16), a temperature sensor interface (2-2) is arranged in the neck ring mold inner sleeve (2-16), and the lower end of a sterilization, the joint is provided with a first sealing gasket (2-12), the upper end of the sterilizing film inlet die section (2-6) is connected with an opening die outer sleeve (2-17), the joint is provided with a second sealing gasket (2-13), an inner sterilizing liquid storage chamber (2-9) is formed by the opening die outer wall (2-8) and the opening die inner sleeve (2-16), the opening die outer wall (2-8) and the opening die outer sleeve (2-17), the sterilizing membrane enters the port die section (2-6) to form an outer sterilizing liquid storage chamber (2-7), the inner sterilizing liquid storage chamber (2-9) leads to a flow channel (2-11) with an air membrane through an inner membrane liquid inlet gap (2-15), and the outer sterilizing liquid storage chamber (2-7) leads to the flow channel (2-11) with the air membrane through an outer membrane liquid inlet gap (2-14); the sterilizing liquid adding system comprises a pipeline (7), a liquid storage tank (8) and a pressure pump (9), wherein inner membrane sterilizing liquid interfaces (2-19) at the top of the mouth mold (2) and outer membrane sterilizing liquid interfaces (2-5) at the bottom of the side face are connected with the liquid storage tank (8) through the pipeline (7), and the pressure pump (9) is arranged in the middle of the pipeline (7).

2. The sterilizing liquid adding system according to claim 1, wherein: the sterilization liquid in the liquid storage tank enters the outer sterilization liquid storage chamber (2-7) and the inner sterilization liquid interface (2-19) through the outer mold sterilization liquid interface (2-5) and then enters the inner sterilization liquid storage chamber (2-9) through the pipeline (7) under the action of the pressure pump (9), and enters the inner sterilization liquid storage chamber (2-9) through the inner film sterilization liquid interface (2-19).

3. A die (2) according to claim 1, characterized in that: the plastic melt extruded from the extruder enters an air film-free flow channel (2-4) consisting of a neck ring die inner sleeve (2-16) and a neck ring die outer sleeve (2-17) through a neck ring die interface (2-1), when the plastic melt enters the air film-free flow channel (2-11), the sterilizing liquid entering from an outer sterilizing liquid storage chamber (2-7) through an outer film liquid inlet gap (2-14) forms a sterilizing material film layer on the outer wall of the plastic melt of the flow channel (2-11) when the air film exists, and the sterilizing liquid entering from an inner sterilizing liquid storage chamber (2-9) through an inner film liquid inlet gap (2-10) forms a sterilizing material film layer on the inner wall of the plastic melt of the flow channel (2-11) when the air film exists.