阅读说明：本技术 一种薄壁小直径医用变径管的加工装置及方法 (Machining device and method for thin-wall small-diameter medical reducer pipe ) 是由 王向廷 赵振东 李仁泽 袁韶 蔡士兵 于 2020-12-16 设计创作，主要内容包括：本发明公开了一种薄壁小直径医用变径管的加工装置及方法,该装置包括：上下对称分布的上模腔、下模腔,所述上模腔与所述下模腔之间设置有内衬杆,所述内衬杆的外表面套设有管坯,所述管坯设置于所述上模腔、所述下模腔与所述内衬杆之间。本发明提出一种薄壁微小直径变径管的加工装置及方法,利用内部腔道形状与变径管外径匹配的模具,在加热后,将管材型坯放入模具中进行热塑拉伸成型；本发明改良了薄壁小直径变径管的成型工序,解决了焊接加工的变径管密封性不好、整体强度不足的缺点,也使类变径管的加工成本降低、生产效率提高,且变径管表面光滑,连续过渡。(The invention discloses a processing device and a method for a thin-wall small-diameter medical reducer pipe, wherein the device comprises the following components: the tube blank forming die comprises an upper die cavity and a lower die cavity which are symmetrically distributed up and down, wherein a lining rod is arranged between the upper die cavity and the lower die cavity, a tube blank is sleeved on the outer surface of the lining rod, and the tube blank is arranged among the upper die cavity, the lower die cavity and the lining rod. The invention provides a processing device and a method of a thin-wall small-diameter reducing pipe, wherein a mould with the shape of an internal cavity matched with the outer diameter of the reducing pipe is used, and after heating, a pipe parison is placed into the mould for thermoplastic stretching forming; the invention improves the forming process of the thin-wall small-diameter reducer, overcomes the defects of poor sealing property and insufficient overall strength of the welded reducer, reduces the processing cost of the reducer, improves the production efficiency, and ensures that the surface of the reducer is smooth and is in continuous transition.)

1. The utility model provides a processingequipment of medical reducing pipe of thin wall minor diameter which characterized in that includes: the upper die cavity (2) and the lower die cavity (2') are symmetrically distributed from top to bottom, an inner lining rod (1) is arranged between the upper die cavity (2) and the lower die cavity (2'), a tube blank (3) is sleeved on the outer surface of the inner lining rod (1), and the tube blank (3) is arranged between the upper die cavity (2) and the lower die cavity (2') and the inner lining rod (1).

2. The processing device of the thin-wall small-diameter medical reducer pipe according to claim 1, wherein the lining rod (1) is in fit and nested connection with the pipe blank (3).

3. The processing device of the thin-wall small-diameter medical reducer pipe according to claim 1, wherein the lining rod (1) comprises a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.

4. The processing device of the thin-wall small-diameter medical reducer pipe according to claim 3, wherein the upper die cavity (2) and the lower die cavity (2') are arranged at the thin end of the lining rod (1).

5. The processing device of the thin-walled small-diameter medical reducer pipe according to claim 3, characterized in that the butt of the lining rod (1) is inserted into the tube blank (3) as a clamped end.

6. A method for processing a thin-wall small-diameter medical reducer pipe is characterized by comprising the following steps:

step SS 1: when the reducer pipe (3') is processed, the pipe blank (3) is sleeved on the lining rod (1);

step SS 2: integrally assembling the tube blank into an upper die cavity (2) and a lower die cavity (2') which are not closed, heating the upper die cavity (2) and the lower die cavity (2') to a specified temperature, closing the upper die cavity (2) and the lower die cavity (2'), and simultaneously stretching the tube blank (3) at a certain speed to enable the tube blank (3) to be attached to an inner lining rod (1);

step SS 3: and (3) performing hot-molding on the thin end and the transition section of the tube blank (3) in the upper mold cavity (2) and the lower mold cavity (2'), cooling, opening the upper mold cavity (2) and the lower mold cavity (2'), drawing the tube blank (3) out of the lining rod (1), and cutting into a specified length to obtain the reducing pipe (3 ').

7. The method for processing the thin-wall small-diameter medical reducer pipe according to claim 6, wherein the lining rod (1) is matched and nested with the pipe blank (3).

8. The method for processing the thin-wall small-diameter medical reducer pipe according to claim 6, wherein the lining rod (1) comprises a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.

9. The method for processing the thin-wall small-diameter medical reducer pipe according to claim 8, wherein the upper die cavity (2) and the lower die cavity (2') are arranged at the thin end of the lining rod (1).

10. The method for processing a thin-walled small-diameter medical reducer pipe according to claim 8, characterized in that the butt of the lining rod (1) is inserted as a clamped end into the tube blank (3).

Technical Field

The invention relates to a device and a method for processing a thin-wall small-diameter medical reducer pipe, belonging to the technical field of processing of high polymer materials.

Background

At present, in the field of interventional medical instruments, reducer pipes are widely used, however, most of reducer pipes are spliced together by means of welding, so that the machined reducer pipes have no perfect sealing performance and connection strength, and the welding process has the advantages of high cost, long time consumption, low productivity and discontinuous surface transition.

Disclosure of Invention

The invention aims to overcome the technical defects in the prior art, provides a device and a method for processing a thin-wall small-diameter medical reducer, and solves the problem that the key point to be overcome in the processing of the thin-wall small-diameter medical reducer can be produced and manufactured at low cost and high efficiency on the premise of ensuring that the thin-wall small-diameter reducer used in a brain intervention operation can meet the design requirement. The similar products of many enterprises are processed by adopting a welding process, and the processed reducer pipe has the defects of poor sealing performance, poor connection strength, higher process cost, long time consumption, low productivity and the like.

The invention specifically adopts the following technical scheme: a thin-wall small-diameter medical reducer pipe processing device comprises: the tube blank forming die comprises an upper die cavity and a lower die cavity which are symmetrically distributed up and down, wherein a lining rod is arranged between the upper die cavity and the lower die cavity, a tube blank is sleeved on the outer surface of the lining rod, and the tube blank is arranged among the upper die cavity, the lower die cavity and the lining rod.

In a preferred embodiment, the lining rod is matched and nested with the tube blank.

As a preferred embodiment, the lining rod comprises a thin end, a transition section and a thick end which are connected in sequence, wherein the thin end is connected with the thick end through the transition section.

In a preferred embodiment, the upper and lower cavities are disposed at the narrow end of the inner liner rod.

In a preferred embodiment, the butt end of the lining rod is inserted into the tube blank as a clamped end.

The invention also provides a processing method of the thin-wall small-diameter medical reducer pipe, which comprises the following steps:

step SS 1: when the reducer pipe is processed, the pipe blank is sleeved on the lining rod;

step SS 2: integrally assembling the upper die cavity and the lower die cavity which are not closed, heating the upper die cavity and the lower die cavity to a specified temperature, closing the upper die cavity and the lower die cavity, and simultaneously stretching the tube blank at a certain speed to enable the tube blank to be attached to the lining rod;

step SS 3: and (3) thermoplastically shaping the thin end and the transition section of the tube blank by the upper die cavity and the lower die cavity, cooling, opening the upper die cavity and the lower die cavity, drawing the tube blank out of the lining rod, and cutting into a specified length to obtain the reducer pipe.

In a preferred embodiment, the lining rod is matched and nested with the tube blank.

As a preferred embodiment, the lining rod comprises a thin end, a transition section and a thick end which are connected in sequence, wherein the thin end is connected with the thick end through the transition section.

In a preferred embodiment, the upper and lower cavities are disposed at the narrow end of the inner liner rod.

In a preferred embodiment, the butt end of the lining rod is inserted into the tube blank as a clamped end.

The invention achieves the following beneficial effects: the invention provides a method for processing a thin-wall small-diameter reducing pipe, which comprises the steps of heating a pipe parison by using a die with an internal cavity shape matched with the external diameter of the reducing pipe, and then putting the pipe parison into the die for thermoplastic stretch forming; the invention improves the forming process of the thin-wall small-diameter reducer, overcomes the defects of poor sealing property and insufficient overall strength of the welded reducer, reduces the processing cost of the reducer, improves the production efficiency, and ensures that the surface of the reducer is smooth and is in continuous transition.

Drawings

FIG. 1 is a schematic view of the overall construction of the reducer pipe of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of the construction of the lining rod of the present invention;

FIG. 4 is a schematic structural view of the upper and lower mold cavities of the present invention;

FIG. 5 is a side view of the upper and lower mold cavities after they have been closed;

FIG. 6 is a schematic view of the tube blank being fitted to the die;

fig. 7 is a schematic view of a tube blank after being processed into a reducer pipe.

The meanings of the symbols in the figures: 1-a lining rod; 2-upper die cavity; 3-tube blank; 2' -lower die cavity; 3' -reducer pipe.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1: as shown in fig. 1, 2, 3 and 4, the present invention provides a processing apparatus for a thin-walled small-diameter medical reducer, comprising: the upper die cavity 2 and the lower die cavity 2' are symmetrically distributed up and down, an inner lining rod 1 is arranged between the upper die cavity 2 and the lower die cavity 2', a tube blank 3 is sleeved on the outer surface of the inner lining rod 1, and the tube blank 3 is arranged between the upper die cavity 2, the lower die cavity 2' and the inner lining rod 1.

Optionally, the lining rod 1 is in fit nested connection with the tube blank 3.

Optionally, the lining rod 1 includes a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.

Optionally, the upper cavity 2 and the lower cavity 2' are arranged at the thin end of the lining rod 1.

Alternatively, the butt end of the lining rod 1 is inserted as a clamped end into the tube blank 3.

Example 2: as shown in fig. 5, 6 and 7, the invention also provides a method for processing the thin-wall small-diameter medical reducer pipe, which comprises the following steps:

step SS 1: when the reducer pipe 3' is processed, the pipe blank 3 is sleeved on the lining rod 1;

step SS 2: integrally assembling the tube blank into an upper die cavity 2 and a lower die cavity 2' which are not closed, heating the upper die cavity 2 and the lower die cavity 2' to a specified temperature, closing the upper die cavity 2 and the lower die cavity 2', and simultaneously stretching the tube blank 3 at a certain speed to enable the tube blank 3 to be attached to the lining rod 1;

step SS 3: and (3) performing hot-molding on the thin end and the transition section of the tube blank 3 by the upper mold cavity 2 and the lower mold cavity 2', opening the upper mold cavity 2 and the lower mold cavity 2' after cooling, drawing the tube blank 3 out of the lining rod 1, and cutting the tube blank into a specified length to obtain the reducer pipe 3 '.

Optionally, the lining rod 1 is in fit nested connection with the tube blank 3.

Optionally, the lining rod 1 includes a thin end, a transition section and a thick end which are connected in sequence, and the thin end is connected with the thick end through the transition section.

Optionally, the upper cavity 2 and the lower cavity 2' are arranged at the thin end of the lining rod 1.

Alternatively, the butt end of the lining rod 1 is inserted as a clamped end into the tube blank 3.

The invention improves the forming process of the thin-wall small-diameter reducer, overcomes the defects of poor sealing property and insufficient overall strength of the welded reducer, reduces the processing cost of the reducer, improves the production efficiency, and ensures that the surface of the reducer is smooth and is in continuous transition.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.