Manufacturing process of plastic injection needle and product thereof
阅读说明：本技术 一种塑料注射针的制作工艺及其产品 (Manufacturing process of plastic injection needle and product thereof ) 是由 周明雄 于 2018-11-21 设计创作，主要内容包括：本发明涉及一种塑料注射针的制作工艺,采用单一塑料或双料注塑工艺实现一次成型,所述注塑工艺包括以下步骤：S1：将塑料原料在烘箱预加热,温度为80℃-150℃,时间为2-8小时；S2：将S1中进行预加热后的塑料原料在注塑机注塑成型,成型温度为180℃-350℃,注塑压力为50-800N；S3：对针座(1)采用S1和S2中的方法进行注塑；S4：对针管(2)采用S1和S2中的方法进行注塑。本发明中一种塑料注射针的制作工艺过程简单、可以自动化生产且耗费能源少,采用本发明的工艺制作的塑料注射针可以完全避免针管表面粗糙造成的碎屑脱落而堵塞针头、堵塞血管的问题。(The invention relates to a manufacturing process of a plastic injection needle, which realizes one-step molding by adopting a single plastic or double-material injection molding process, wherein the injection molding process comprises the following steps: s1: preheating the plastic raw material in an oven at the temperature of 80-150 ℃ for 2-8 hours; s2: performing injection molding on the preheated plastic raw material in the S1 in an injection molding machine, wherein the molding temperature is 180-350 ℃, and the injection molding pressure is 50-800N; s3: injection molding is carried out on the needle seat (1) by adopting the methods in S1 and S2; s4: the syringe (2) was injection-molded by the methods of S1 and S2. The plastic injection needle manufactured by the process can completely avoid the problems of blockage of a needle head and blockage of blood vessels due to falling of scraps caused by rough surface of the needle tube.)
1. A manufacturing process of a plastic injection needle is characterized in that a single-plastic or double-material injection molding process is adopted to realize one-time molding.
2. A process for making a plastic injection needle as defined in claim 1, comprising the steps of:
s1: preheating the plastic raw material in an oven at the temperature of 80-150 ℃ for 2-8 hours;
s2: performing injection molding on the preheated plastic raw material in the S1 in an injection molding machine, wherein the molding temperature is 180-350 ℃, and the injection molding pressure is 50-800N;
s3: injection molding is carried out on the needle seat (1) by adopting the methods in S1 and S2;
s4: the syringe (2) was injection-molded by the methods of S1 and S2.
3. A process for manufacturing a plastic injection needle according to claim 2, wherein in the manufacturing of the needle holder (1), the plastic material is polypropylene (PP), acrylonitrile-styrene-butadiene copolymer (ABS), Polyethylene (PE), polyglycolic acid (PGA), or α -hydroxyalkanoate (PHA).
4. A process for manufacturing a plastic injection needle according to claim 3, wherein the plastic material used for manufacturing the needle tube (2) is a polyhydroxyacid compound (PGA, PLA), an aliphatic polyester polymer (PES, PBS, PBSA), a polycyclolactone compound (PBL, PVL, PCL), a polycarbonate compound (PTMC) or α -hydroxyalkanoate (PHA).
5. A process for manufacturing a plastic injection needle according to claim 1, wherein the connection fastness of the needle base (1) and the needle tube (2) is 10-100N.
6. A plastic injection needle manufactured by the process according to any of claims 1 to 5,
the diameter of the needle tube (2) is 0.1-3.5mm,
the thickness of the needle tube (2) and the inner diameter (5) of the needle tube is 0.05-2.5mm,
the length of the needle tube (2) is 4-100mm, the length of the needle tube (2) is the distance from the edge of the needle tube (2) and the needle seat (1) which are integrally connected to the tip (4) of the needle point,
the toughness requirement of the needle tube (2) is 5-35mm,
the needle point (3) is provided with three sections, a first section (6), a second section (7) and a third section (8),
the angle of the first section (6) is either 11 DEG + -5 DEG (LB) or 17 DEG + -5 DEG (SB),
the piercing force of the first tangent plane (6), the second tangent plane (7), the third tangent plane (8) and the needlepoint sharp head (4) is 0.2-1.5N.
Technical Field
The invention relates to the field of devices for introducing media into a body in a mode of subcutaneous injection, intravenous injection or intramuscular injection, in particular to a manufacturing process of a plastic injection needle and a product thereof.
Background
The production process flow of the traditional injection needle is as follows: 316L seamless steel pipe → heating and pulling pipe → cutting pipe → ultrasonic cleaning → drying → arranging and pasting glue for fixation → grinding needle point → high pressure cleaning → checking (removing) burr → whole bundle → ultrasonic cleaning → checking and blocking → checking burr → re-ultrasonic cleaning → drying → pasting needle → drying → applying silicon oil → covering protective cap. The prior injection needle production process has the following defects: the process is complex, the automatic production cannot be realized, the energy consumption is high, a large amount of water is needed for cleaning, the water pollution is caused, and the production period is too long.
Most of the existing puncture needles are metal needles, the needles for medical injection are formed by bonding a steel needle and a plastic head, the metal needles are composed of rigid needle tubes, needle points and needle holes for the inlet and outlet of fluid, the needle tubes and the needle points are connected together, and the needle holes for the inlet and outlet of the fluid are arranged on the needle points. Most of the technological methods adopted for the final forming of the sharp needle point of the metal needle head are grinding, the grinding material in a grinding tool is hard and angular abrasive particles, the hard edges of the abrasive particles dig a groove on the surface of a processed blank and remove the part of the original blank in the groove, and the essence of the grinding technology is the mass accumulation of the processes. When the metal needle is used for puncturing, when the rough metal surface is tightly attached to a punctured object and slides downwards, a large amount of tiny cutting processes can occur, and the punctured object is chipped and falls off. When a metal needle is used for puncturing a rubber plug on an injection package, the fallen rubber fragments can enter the injection, and the insoluble particles can enter a human body together with the injection, so that the health and the safety of a patient are damaged. When muscle or vein injection is carried out, a bevel needle is used, the bottom of a needle hole of the metal needle head is provided with a crescent sharp cutting edge, small fragments caused by micro cutting fall off after the metal needle head enters a human body, and sometimes larger tissue fragments fall off, so that the needle head can be blocked and blood vessels can be blocked. In the blood sampling using the vacuum tube, since many fragments falling off from the puncture rubber plug are fine particles with the diameter of several micrometers, in the item of blood test, when the visible components with different sizes need to be classified and counted, the test result may be interfered.
The existing production process of the injection needle has the defects of complex process, incapability of automatic production, high energy consumption, serious water pollution caused by the need of washing by a large amount of water, long production period, falling of scraps of a rubber plug when the rubber plug is punctured due to the manufacturing process of the metal needle, possibility of blocking the needle head, blocking blood vessels and the like.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a manufacturing process of a plastic injection needle and a product thereof.
The invention adopts the following technical scheme:
a technology for making plastic injection needle features use of single or dual plastic injection moulding to realize one-step moulding.
Specifically, the manufacturing process comprises the following steps:
s1: preheating the plastic raw material in an oven at the temperature of 80-150 ℃ for 2-8 hours;
s2: performing injection molding on the preheated plastic raw material in the S1 in an injection molding machine, wherein the molding temperature is 180-350 ℃, and the injection molding pressure is 50-800N;
s3: injection molding is carried out on the needle seat by adopting the methods of S1 and S2;
s4: the syringe was injection molded using the methods of S1 and S2.
Specifically, in the manufacturing of the needle seat, the plastic raw material is polypropylene (PP), acrylonitrile-styrene-butadiene copolymer (ABS), Polyethylene (PE), polyglycolic acid (PGA) or α -hydroxyalkanoate (PHA).
Specifically, in the needle tube production, the plastic material is polyhydroxyacid (PGA, PLA), aliphatic polyester polymer (PES, PBS, PBSA), polycyclolactones (PBL, PVL, PCL), Polycarbonates (PTMC), or α -hydroxyalkanoate (PHA).
Specifically, the connection firm force of the needle seat and the needle tube is 10-100N.
From the viewpoint of selected materials, plastics such as polypropylene (PP), polyhydroxyacids (PGA, PLA), aliphatic polyester polymers (PES, PBS, PBSA), polycyclolactones (PBL, PVL, PCL), Polycarbonates (PTMC), α -hydroxyalkanoates (PHA), and the like are recognized as green plastics harmless to humans and environment, and polypropylene (PP) can be called as green plastics because its structure is closely related to human life's triad C, H, O, and meets the environmental protection requirements no matter whether recycled or burned, and has excellent plasticity, temperature resistance, impact resistance, and lightest specific gravity, and can be used as an optimal material for plastic-substituted steel and plastic-substituted wood, and can be used as an automobile material, a green environment-friendly building material, an environment-friendly medical device, a household appliance product, and the like which meet the requirements for light weight.
The plastic injection needle manufactured by the manufacturing process of the invention meets the national standard.
In particular, the plastic injection needle manufactured according to the above process,
the diameter of the needle tube is 0.1-3.5mm,
the thickness of the needle tube and the inner diameter of the needle tube is 0.05-2.5mm,
the length of the needle tube is 4-100mm, the length of the needle tube is the distance from the edge of the needle tube and the needle seat which are integrally connected to each other to the tip of the needle point,
the toughness requirement of the needle tube is 5-35mm,
the needle point is provided with three sections, a first section, a second section and a third section,
the first section angle is at 11 ° ± 5 ° (LB) or 17 ° ± 5 ° (SB),
the piercing force of the first section, the second section, the third section and the needle point tip is 0.2-1.5N.
The plastic injection needle manufactured according to the process consists of a needle seat, a needle tube, a needle tip and the inner diameter of the needle tube for the fluid to enter and exit, wherein the needle seat, the needle tube and the needle tip are integrally formed and connected together, and the needle tip connected with the needle tube is arranged at one end of the needle tube and is only one; the inner diameter of the needle tube for the fluid to enter and exit is opened on the needle point, the needle point is wedge-shaped, and the part of the inclined annular frontal surface of the needle point formed by the injection molding process is all injection molded by plastic or resin. The surface of the liquid is smooth during final solidification due to the surface tension of the liquid which minimizes its surface area, and prevents fine debris from falling off during penetration. The plastic injection needle provided by the invention can be used in a plurality of operations needing puncture, such as medicine dispensing, transfusion, blood sampling, muscle or intravenous injection and the like, and the main reason for the falling of fragments of puncture objects is eliminated because the part with the needle point formed by one-time injection molding has no possibility of carrying out a large amount of micro cutting, so that the phenomenon of the falling of the fragments in the puncture process of various puncture objects can be greatly reduced.
Compared with the prior art, the invention has the following beneficial effects: the plastic injection needle has the advantages of simplified process, automatic production and short production period through the process of drying PP and PGA plastic raw materials → injection molding → burr detection and incomplete molding → blockage detection → silicone oil application → protective cap covering, and the injection needle formed by the plastic material avoids the problems of needle head blockage and blood vessel blockage caused by rough surface of the needle tube and chip falling off in the puncture process.
Drawings
Fig. 1 is a schematic cross-sectional view of a plastic injection needle product of the present invention;
fig. 2 is a perspective view of the needle of a plastic injection needle product of the present invention;
fig. 3 is a right side view of the needle head of a plastic injection needle product of the present invention;
in the figures, specific reference numerals are as follows: the needle base 1, the
Detailed Description
The invention is described in detail below with reference to the accompanying drawings.
A technology for making plastic injection needle features use of single or dual plastic injection moulding to realize one-step moulding.
The injection molding process of the needle base 1 comprises the following steps:
s1: preheating the plastic raw material in an oven at the temperature of 80-120 ℃ for 2-8 hours;
s2: and (5) performing injection molding on the preheated plastic raw material in the step (S1) in an injection molding machine at the molding temperature of 180-260 ℃ and the injection pressure of 50-800N to obtain a finished product of the needle seat 1.
The manufacturing process of the
s1: preheating the plastic raw material in an oven at the temperature of 100-150 ℃ for 2-8 hours;
s2: and (3) performing injection molding on the preheated plastic raw material in the step (S1) in an injection molding machine at the molding temperature of 240-350 ℃ and the injection molding pressure of 50-800N to obtain a finished product of the
In the manufacture of the needle holder 1, the plastic raw material is polypropylene (PP), acrylonitrile-styrene-butadiene copolymer (ABS), Polyethylene (PE), polyglycolic acid (PGA) or α -hydroxyalkanoate (PHA).
In the production of the
Wherein the firm connection force between the needle stand 1 and the
The plastic injection needle manufactured by the manufacturing process of the invention meets the national standard, referring to fig. 1-3, the diameter of a
The plastic injection needle comprises a needle seat 1, a
The foregoing detailed description is given by way of example only, to better enable one of ordinary skill in the art to understand the patent, and is not to be construed as limiting the scope of what is encompassed by the patent; any equivalent alterations or modifications of the apparatus according to the present disclosure are intended to fall within the scope of the present disclosure.