CN106042349B

CN106042349B - A kind of forming method of sacculus

Info

Publication number: CN106042349B
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: 2018-06-19
Anticipated expiration: 2036-08-03
Also published as: CN106042349A

Abstract

The invention discloses a kind of sacculus forming method, the tubing for being used to prepare sacculus is divided into middle section, by the tapering of two close end, the end at both ends, three parts by this method；Then this three parts is respectively heated and stretched, so as to obtain the uniform sacculus of thickness.It is matched by Segmented heating with rational tensile speed, makes that the sacculus thickness prepared by the method for the present invention is uniform, and flexibility is good, it is easy to fold, the ability enhancing of lesion region blood vessel is not only made it through, and reduces the product size of entire sacculus, more conducively packed and transported.

Description

A kind of forming method of sacculus

Technical field

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

Background technology

At present used by the manufacturing enterprise of medical balloon moulding process be all stretch-blow in mold process conditions, i.e., Intermediate coat heats, and the mold of closing mould stretching is held, one as disclosed in existing Chinese patent application：High pressure resistant sacculus molding technology, Shen Please number 200910067937.X, the sacculus middle section thickness to form out in this way is uniform, but is begun to gradually from sacculus tapering Thickening and hardness becomes larger, and after sacculus molding in this way makes product, many deficiencies can be faced in the folding process of sacculus, such as Sacculus tapering after folding is harder, and sacculus Fold Flap is not adherent enough, this can lead to the bigger than normal of entire sacculus product outer diameter, use It will be declined by the ability in vascular lesion region in the process, substantially reduce its usability.

Invention content

The defects of present invention aim to overcome existing medical balloon end harder, provides a kind of simple and practicable ball Capsule forming method, to produce all uniform medical balloon of various pieces thickness.

To achieve the above object, the sacculus forming method designed by the present invention, its step are as follows：

1) prepare the tubing for making sacculus；

2) tubing one end is closed, the other end is filled with high pressure gas；

3) tubing is integrally heated, tubing forms a bullet after heating in the deflated condition, it includes centre Partly, by the tapering of two close end, the end at both ends, three parts；Then using the both ends of tubing as impetus, first time drawing is carried out It stretches, the middle section of bullet is made to reach the thickness being pre-designed；

4) be cooled to room temperature the middle section that stretching finishes, and heat simultaneously bullet by the tapering of two close end and two The end at end then using the both ends of tubing as impetus, carries out second and stretches, the tapering of tubing is made to reach the thickness being pre-designed Degree；

5) it is cooled to room temperature the tapering that stretching finishes, and heats the end at bullet both ends simultaneously, then with tubing Both ends are impetus, carry out third time stretching, the end of tubing is made to reach the thickness being pre-designed, ball is obtained after cooling and shaping Capsule.

Said program, the temperature integrally heated to tubing in the step 3) are 120~220 DEG C.

Said program, when the step 3) middle first time stretches, gas pressure is 5~50atm in tubing.

Said program, the temperature of the end in the tapering and both ends by two close end of the middle heating bullet of the step 4) are 150~250 DEG C.

Said program, the temperature of the end at the middle heating bullet both ends of the step 5) is 150~250 DEG C.

Said program, the step 3), 4), 5) in, tensile speed during stretching is 1~20mm/s.

Beneficial effects of the present invention：It is matched by Segmented heating with rational tensile speed, makes the method for the present invention institute The sacculus thickness of preparation is uniform, and flexibility is good, is easy to fold, and not only makes it through the ability enhancing of lesion region blood vessel, and contracts The small product size of entire sacculus, more conducively packed and transported.

Description of the drawings

Fig. 1 is the schematic cross-sectional view of the sacculus prepared by sacculus forming method of the present invention.

Specific embodiment

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

As shown in Figure 1, the preparation-obtained sacculus of sacculus forming method from end to middle section thickness uniform, this method Step is as follows：

1) prepare the tubing for making sacculus；

2) tubing is placed in sacculus molding die, one end closing, the other end is filled with high pressure gas；

3) sacculus molding die is integrally heated, gas pressure is set as 5~50atm, temperature is 120~220 DEG C, tubing softens and forms a bullet after being affixed on sacculus molding die inner wall under gas high pressure effect at high temperature, it Comprising middle section 1, by the tapering 2 of two close end, the end 3 at both ends, three parts；The sacculus molding die includes intermediate heat Mold (not shown), tapering heating mold (not shown), end heat mold (not shown), these three molds are individually present, Interior shape is respectively cooperating with the middle section 1 of bullet, by the tapering 2 of two close end, the end 3 at both ends；It is right after temperature stabilization Tubing carries out first time stretching, stretches the both ends of tubing simultaneously with the speed of 1~20mm/s, reaches the middle section 1 of tubing The thickness being pre-designed keeps 10~30s after the completion of stretching；

4) it is cooled to room temperature intermediate heating mold, mold and end is heated into tapering while centre heating mold cooling Portion's heating mold is warming up to 150~250 DEG C, after temperature stabilization, carries out second to tubing and stretches, with the speed of 1~20mm/s Degree stretches the both ends of tubing simultaneously, and the tapering 2 of tubing is made to reach the thickness being pre-designed, and 10~30s is kept after the completion of stretching；

5) it is cooled to room temperature tapering heating mold, (similarly step 3, tapering are kept not when tapering heating mold cools down Become), while end heat mold is warming up to 150~250 DEG C, and after temperature stabilization, third time stretching is carried out to tubing, with 1~ The speed of 20mm/s stretches the both ends of tubing simultaneously, and the end 3 of tubing is made to reach the thickness being pre-designed, and is kept after the completion of stretching 10~30s, end heat mold are cooled to room temperature, and are opened mold, are obtained the uniform sacculus of each section thickness.

After testing, the sacculus thickness prepared by the above method is uniform, and flexibility is good, is easy to fold.

Claims

1. a kind of sacculus forming method, which is characterized in that step is as follows：

1) prepare the tubing for making sacculus；

2) tubing one end is closed, the other end is filled with high pressure gas；

3) tubing is integrally heated, the temperature of heating is 120~220 DEG C, and tubing forms one after heating in the deflated condition A bullet, it includes middle section, by the tapering of two close end, the end at both ends, three parts；Then using the both ends of tubing as Force carries out first time stretching, the middle section of bullet is made to reach the thickness being pre-designed；

4) it is cooled to room temperature the middle section that stretching finishes, and heats the tapering and both ends by two close end of bullet simultaneously End then using the both ends of tubing as impetus, carries out second and stretches, the tapering of tubing is made to reach the thickness being pre-designed；

5) it is cooled to room temperature the tapering that stretching finishes, and heats the end at bullet both ends simultaneously, then with the both ends of tubing For impetus, third time stretching is carried out, the end of tubing is made to reach the thickness being pre-designed, sacculus is obtained after cooling and shaping.

2. sacculus forming method according to claim 1, it is characterised in that：When being stretched for the first time in the step 3), pipe Gas pressure is 5~50atm in material.

3. sacculus forming method according to claim 1, it is characterised in that：Heating bullet is close in the step 4) The temperature of the tapering at both ends and the end at both ends is 150~250 DEG C.

4. sacculus forming method according to claim 1, it is characterised in that：Heating bullet both ends in the step 5) The temperature of end is 150~250 DEG C.

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