CN106042349A

CN106042349A - Forming method of balloon

Info

Publication number: CN106042349A
Application number: CN201610629671.3A
Authority: CN
Inventors: 严拓; 刘思诗; 王书刚
Original assignee: Wuhan Fu Mai Medical Technology Co Ltd
Current assignee: Wuhan Fu Mai Medical Technology Co Ltd
Priority date: 2016-08-03
Filing date: 2016-08-03
Publication date: 2016-10-26
Anticipated expiration: 2036-08-03
Also published as: CN106042349B

Abstract

The invention discloses a forming method of a balloon. According to the method, a pipe for making a balloon is divided into three parts: a middle part, tapered parts adjacent to two ends, and end parts of the two ends. The three parts are subjected to heating and tension, respectively, to obtain a balloon with uniform thickness. Through cooperation of separate heating with a reasonable tensile speed, the balloon made through the forming method is uniform in thickness, good in flexibility and easy to fold. The ability for passing through lesion blood vessels is improved, the size of the whole balloon is decreased, and the balloon is convenient for packaging and transportation.

Description

A kind of forming method of sacculus

Technical field

The present invention relates to the preparation method of a kind of medical balloon, in particular to a kind of sacculus forming method.

Background technology

The moulding process that at present manufacturing enterprise of medical balloon is used is all the process conditions of stretch-blow in mould, i.e. Intermediate coat heats, the mould of end closing mould stretching, as disclosed in existing Chinese patent application one: high pressure resistant sacculus molding technology, Shen Please number 200910067937.X, the sacculus mid portion thickness so formed out is uniform, but begins to gradually from sacculus tapering Thickening and hardness becomes big, after the sacculus of such molding makes product, can face many deficiencies in the folding process of sacculus, as Sacculus tapering after folding is harder, and sacculus Fold Flap is the most adherent, and this can cause the bigger than normal of whole sacculus product external diameter, is using During will be declined by the ability in vascular lesion region, be substantially reduced its usability.

Summary of the invention

Present invention aim to the defect overcoming existing medical balloon end harder, it is provided that a kind of simple ball Capsule forming method, to produce all uniform medical balloon of various piece thickness.

For achieving the above object, the sacculus forming method designed by the present invention, its step is as follows:

1) tubing for making sacculus is prepared；

2) being closed tubing one end, the other end is filled with gases at high pressure；

3) heating tubing entirety, tubing forms a bullet after heating in the deflated condition, and it comprises centre Partly, near the tapering at two ends, the end at two ends, three parts；Then with the two ends of tubing as impetus, carry out drawing for the first time Stretch, make the mid portion of bullet reach the thickness being pre-designed；

4) mid portion making stretching complete is cooled to room temperature, and the tapering and two at the close two ends of bullet of simultaneously heating The end of end, then with the two ends of tubing as impetus, carries out second time and stretches, make the tapering of tubing reach the thickness being pre-designed Degree；

5) tapering making stretching complete is cooled to room temperature, and the end at bullet two ends of simultaneously heating, then with tubing Two ends are impetus, carry out third time and stretch, make the end of tubing reach the thickness being pre-designed, obtain ball after cooling and shaping Capsule.

Such scheme, described step 3) in temperature that tubing entirety is heated be 120～220 DEG C.

Such scheme, described step 3) in stretching for the first time time, in tubing, gas pressure is 5～50atm.

Such scheme, described step 4) in the heat temperature of end at the tapering at close two ends of bullet and two ends be 150～250 DEG C.

Such scheme, described step 5) in the heat temperature of end at bullet two ends be 150～250 DEG C.

Such scheme, described step 3), 4), 5) in, draw speed during stretching is 1～20mm/s.

Beneficial effects of the present invention: matched with rational draw speed by Segmented heating, makes the inventive method institute The sacculus thickness of preparation is homogeneous, and flexibility is good, it is easy to fold, and the ability being not only passed to lesion region blood vessel strengthens, and contracting The little product size of whole sacculus, more conducively packed and transported.

Accompanying drawing explanation

Fig. 1 is the sectional structure schematic diagram of the sacculus prepared by sacculus forming method of the present invention.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

As it is shown in figure 1, the preparation-obtained sacculus of sacculus forming method is uniform to mid portion thickness from end, the method Step is as follows:

1) tubing for making sacculus is prepared；

2) being inserted by tubing in sacculus mould, one end is closed, and the other end is filled with gases at high pressure；

3) heating sacculus mould entirety, gas pressure is set to 5～50atm, temperature is 120～220 DEG C, tubing forms a bullet after at high temperature softening and being affixed on sacculus mould inwall under gas high pressure effect, it Comprise mid portion 1, the close tapering 2 at two ends, the end 3 at two ends, three parts；Described sacculus mould includes middle heating Mould (not shown), tapering heating mould (not shown), end heat mould (not shown), these three mould is individually present, its Interior shape is respectively cooperating with the mid portion 1 of bullet, near the tapering 2 at two ends, the end 3 at two ends；After temperature stabilization, right Tubing carries out stretching for the first time, and the speed with 1～20mm/s stretches the two ends of tubing simultaneously, makes the mid portion 1 of tubing reach The thickness being pre-designed, keeps 10～30s after having stretched；

4) make middle heating mould be cooled to room temperature, while centre heating mould cooling, tapering is heated mould and end Portion's heating mould is warming up to 150～250 DEG C, after temperature stabilization, tubing carries out second time and stretches, with the speed of 1～20mm/s Degree stretches the two ends of tubing simultaneously, makes the tapering 2 of tubing reach the thickness being pre-designed, and keeps 10～30s after having stretched；

5) making tapering heating mould be cooled to room temperature, during tapering heating mould cooling, (in like manner step 3, tapering keeps not Become), end heat mould is warming up to 150～250 DEG C simultaneously, after temperature stabilization, tubing carries out third time and stretches, with 1～ The speed of 20mm/s stretches the two ends of tubing simultaneously, makes the end 3 of tubing reach the thickness being pre-designed, and keeps after having stretched 10～30s, end heat mould is cooled to room temperature, opens mould, obtains the sacculus that each several part thickness is homogeneous.

After testing, the sacculus thickness prepared by said method is homogeneous, and flexibility is good, it is easy to fold.

Claims

1. a sacculus forming method, it is characterised in that step is as follows:

1) tubing for making sacculus is prepared；

3) tubing entirety is heated, tubing heat in the deflated condition after formed a bullet, it comprise mid portion, Near the tapering at two ends, the end at two ends, three parts；Then with the two ends of tubing as impetus, carry out stretching for the first time, make cone The mid portion of body reaches the thickness being pre-designed；

4) mid portion making stretching complete is cooled to room temperature, and the tapering at the close two ends of bullet of simultaneously heating and two ends End, then with the two ends of tubing as impetus, carries out second time and stretches, make the tapering of tubing reach the thickness being pre-designed；

5) tapering making stretching complete is cooled to room temperature, and the end at bullet two ends of simultaneously heating, then with the two ends of tubing For impetus, carry out third time and stretch, make the end of tubing reach the thickness being pre-designed, after cooling and shaping, obtain sacculus.

Sacculus forming method the most according to claim 1, it is characterised in that: described step 3) in tubing entirety is added The temperature of heat is 120～220 DEG C.

Sacculus forming method the most according to claim 1, it is characterised in that: described step 3) in for the first time stretching time, pipe In material, gas pressure is 5～50atm.

Sacculus forming method the most according to claim 1, it is characterised in that: described step 4) in heat the close of bullet The temperature of the tapering at two ends and the end at two ends is 150～250 DEG C.

Sacculus forming method the most according to claim 1, it is characterised in that: described step 5) in heat bullet two ends The temperature of end is 150～250 DEG C.

6. according to the sacculus forming method described in any one of Claims 1 to 5, it is characterised in that: described step 3), 4), 5) in, Draw speed during stretching is 1～20mm/s.