CN218838581U

CN218838581U - Extruder head unit for producing polymer micro-catheter

Info

Publication number: CN218838581U
Application number: CN202220753878.2U
Authority: CN
Inventors: 范建强; 金福洪
Original assignee: Ningbo Jinshan Micro Precision Robot Co ltd
Current assignee: Ningbo Jinshan Micro Precision Robot Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-04-11
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses an extruder head unit for producing a polymer micro-catheter, which comprises an neck ring mold, a core rod and a neck ring mold base, wherein the neck ring mold comprises a neck ring mold cone, a straight round hole and neck ring mold end threads; the core rod comprises a core rod tip, a core rod cone and a core rod tail end; the neck ring mold comprises a neck ring mold base, a neck ring mold cone, a neck ring mold fixing hole and a neck ring mold fixing hole, wherein the neck ring mold cone is of a hollow structure, a straight circular hole is positioned at the top of the neck ring mold cone, and neck ring mold tail end threads are arranged at the tail end below the neck ring mold cone and used for fixing the neck ring mold on the neck ring mold base through the neck ring mold fixing hole; the core rod is of a solid structure, and a spiral groove is formed in the core rod; the core rod is coaxially inserted to the bottommost part of the neck ring cone, and the inner wall of the neck ring cone, the outer side of the core rod cone and the spiral groove of the core rod form a through extrusion channel in a surrounding mode. The utility model provides a bush and plug have newly increased spiral groove, have compared with traditional plug and have increased the feeding volume, are favorable to improving the production speed of little pipe, and the spare part that this extruder head unit contains is few, simple structure.

Description

Extruder head unit for producing polymer micro-catheter

Technical Field

The utility model belongs to the technical field of extrusion moulding mould production, concretely relates to extrude aircraft nose unit for producing little pipe of polymer.

Background

Microcatheters are used in a variety of medical procedures for the diagnosis and treatment of conditions and diseases occurring at remote, highly tortuous vascular sites. The die body is connected to a plastic extruder and used for fixing the spreader cone, the core rod and the neck ring, the spreader cone is used for dividing cylindrical flow into circular circulation, and medical catheters with different sizes can be extruded by regulating and controlling the sizes of the core rod and the neck ring.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an extrude aircraft nose unit for producing little pipe of polymer, the little pipe quality than poor problem of production efficiency ratio lower and production in the production process of having solved current little pipe.

The utility model provides an extruder head unit for producing a polymer micro-catheter, which comprises an neck ring mold, a core rod and a neck ring mold base, wherein the neck ring mold comprises a neck ring mold cone, a straight round hole and neck ring mold end threads; the mandrel comprises a mandrel tip, a mandrel cone and a mandrel tail end; the neck ring mold comprises a neck ring mold base, a neck ring mold cone, a neck ring mold fixing hole and a neck ring mold fixing hole, wherein the neck ring mold cone is of a hollow structure, a straight round hole is formed in the top of the neck ring mold cone, and neck ring mold tail end threads are arranged at the tail end below the neck ring mold cone and used for fixing the neck ring mold on the neck ring mold base through the neck ring mold fixing hole; the core rod is of a solid structure, and a spiral groove is formed in the core rod; the core rod is coaxially inserted to the bottommost part of the neck ring cone, a straight round hole in the top of the neck ring cone is used as an outlet of the tip end of the core rod, and the inner wall of the neck ring cone, the outer wall of the core rod cone and the spiral groove of the core rod enclose a communicated extrusion channel.

Preferably, the outer side of the neck ring cone is provided with a step, so that the tail end of the neck ring is screwed and fixed on the neck ring fixing hole of the neck ring base conveniently by using a tool.

As a further preference, the spiral groove runs from the end of the core rod along the core rod cone to the tip of the core rod.

Preferably, the cross section of the spiral groove is square, and the depth and the width of the spiral groove are both 0.2 mm-1 mm.

Preferably, four die base fixing holes are formed around the die fixing hole of the die base and used for fixing the die base on the extruder head.

More preferably, the diameter of the straight circular hole at the top of the die cone is in the range of 0.1mm to 0.3mm.

More preferably, the diameter of the mandrel tip of the mandrel is in the range of 0.04mm to 0.2mm.

The technical scheme of the utility model have following advantage or beneficial effect:

(1) The utility model provides a be equipped with the feedstock channel of spiral groove conduct polymer raw materials on the plug of extruder head unit, this spiral groove's design is compared with traditional direct current recess and has increased feedstock channel's length, has increased the feed volume, is favorable to improving the production speed of little pipe.

(2) The utility model provides an extrusion aircraft nose unit for producing little pipe of polymer contains spare part few, simple structure, and manufacturing process is simple.

Drawings

FIG. 1 is a schematic cross-sectional view of an extruder head unit of the present invention;

fig. 2 is a top view of a die base in the present invention;

1-neck ring, 11-neck ring cone, 12-neck ring tail end screw thread, 13-straight round hole, 2-core rod, 21-core rod tip, 22-core rod cone, 23-core rod tail end, 24-spiral groove, 3-neck ring base, 31-neck ring fixing hole and 32-neck ring base fixing hole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

As shown in fig. 1, an extruder head unit for producing a polymer microcatheter comprises a die (1), a core rod (2) and a die base (3), wherein the die (1) comprises a die cone (11), a straight circular hole (13) and a die end thread (12); the mandrel (2) comprises a mandrel tip (21), a mandrel cone (22) and a mandrel tip (23). The mouth mold cone (11) is of a hollow structure, a straight round hole (13) is formed in the top of the mouth mold cone (11), and mouth mold tail end threads (12) are arranged at the tail end of the lower portion of the mouth mold cone (11) and used for fixing the mouth mold (1) on the mouth mold base (3) through the mouth mold fixing hole (31). As shown in fig. 2, four die base fixing holes (32) are arranged around the die fixing hole (31) on the die base (3) for fixing the die base (3) on the extruder head. The outer side of the neck ring mould cone (11) is provided with a step, so that the tail end screw thread (12) of the neck ring mould can be rotationally fixed on a neck ring mould fixing hole (31) of the neck ring mould base (3) by using a tool conveniently.

As shown in fig. 1, the core rod (2) is a solid structure, and a spiral groove (24) is provided on the core rod (2), and the spiral groove (24) on the core rod (2) starts from the end (23) of the core rod and ends along the core rod cone (22) to the end close to the tip (21) of the core rod. The section of the spiral groove (24) in the core rod (2) is square, and the depth and width ranges are 0.2 mm-1 mm. The core rod (2) is coaxially inserted to the bottommost part of the die cone (11), a straight round hole (13) at the top of the die cone (11) is used as an outlet of a tip end (21) of the core rod, and the inner wall of the die cone (11), the outer side of the core rod cone (22) and the spiral groove (24) form a through extrusion channel, wherein the channel is a flowing channel of raw materials for producing the high-molecular micro catheter in an extruder head die. The utility model discloses increased the design of spiral groove (24) in plug (2), compared with traditional direct current recess and increased feedstock channel's length, increased the feeding volume, be favorable to improving the production speed of polymer pipe a little.

The diameter range of the straight round hole (13) at the top of the neck ring cone (11) is 0.1 mm-0.3 mm; the diameter of the core rod tip (21) in the core rod (2) is 0.04 mm-0.2 mm. The diameter of the straight round hole (13) determines the size of the outer diameter of the produced micro-catheter, and the diameter of the core rod tip (21) determines the size of the diameter of the inner cavity of the produced micro-catheter and the thickness of the pipe wall of the micro-catheter. Through adjusting the utility model provides a diameter of straight round hole (13) and the diameter size of plug most advanced (21), can carry out accurate control to the size of the little pipe of production, the spare part that should extrude aircraft nose unit and contain is few, simple structure, and manufacturing process is simple.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. An extruder head unit for producing a polymer micro-catheter is characterized by comprising an neck mold, a core rod and a neck mold base, wherein the neck mold comprises a neck mold cone, a straight round hole and neck mold tail end threads; the mandrel comprises a mandrel tip, a mandrel cone and a mandrel tail end; the neck ring mold comprises a neck ring mold base, a neck ring mold cone, a neck ring mold fixing hole and a neck ring mold fixing hole, wherein the neck ring mold cone is of a hollow structure, a straight round hole is formed in the top of the neck ring mold cone, and neck ring mold tail end threads are arranged at the tail end below the neck ring mold cone and used for fixing the neck ring mold on the neck ring mold base through the neck ring mold fixing hole; the core rod is of a solid structure, and a spiral groove is formed in the core rod; the core rod is coaxially inserted to the bottommost part of the neck ring cone, a straight round hole at the top of the neck ring cone is used as an outlet of the tip end of the core rod, and the inner wall of the neck ring cone, the outer wall of the neck ring cone and the spiral groove of the core rod form a through extrusion channel in a surrounding mode.

2. The extruder head unit for producing a polymer microcatheter according to claim 1, wherein the outside of said die cone is provided with a step for facilitating the use of a tool for screw-fixing the end of the die to the die fixing hole of the die base.

3. The extruder head unit for producing a polymeric microcatheter of claim 1, wherein said helical groove starts from the end of the mandrel and follows the taper of the mandrel to the tip of the mandrel.

4. The extruder head unit for producing a polymer microcatheter according to claim 3, wherein said spiral groove has a square cross section and a depth and width in the range of 0.2mm to 1mm.

5. The extruder head unit for producing the polymer microcatheter of claim 1, wherein four die base fixing holes are provided around the die fixing hole position of the die base for fixing the die base to the extruder head.

6. The extruder head unit for producing a polymer microcatheter according to claim 1, wherein the diameter of the straight circular hole at the top of the die cone ranges from 0.1mm to 0.3mm.

7. The extruder head unit for producing a polymeric microcatheter of claim 1, wherein the mandrel tip diameter of the mandrel ranges from 0.04mm to 0.2mm.