A double-balloon sleeve split mold core

Abstract

The present invention provides a double-balloon sleeve split mold core, which relates to the field of balloon molds, including a sleeve, wherein the right end of the sleeve is fixedly connected to a fixed mold, the left end of the sleeve is slidably connected to a movable mold, an upper split mold core and a lower split mold core are arranged between the fixed mold and the movable mold in the sleeve and are axially slidably connected to the sleeve, and a blank is arranged in the sleeve and sequentially passes through the movable mold, the upper split mold core, the lower split mold core, and the fixed mold. In the present invention, when opening the mold, the various parts of the mold can be separated step by step, and the mold opening is convenient; secondly, the position of the mating surface of the double-balloon sleeve split mold core can be adjusted according to specific needs, and finished products of different specifications can be obtained by blow molding; finally, the air hole of the mold core is designed at the position of the mating surface of the split mold core to avoid the gas enclosed in the cavity affecting the double-balloon molding quality during the blow molding process in the cavity of the double-balloon sleeve split mold core.

Description

Technical Field

[0001] The invention relates to the field of balloon molds, and in particular to a double-balloon sleeve type split mold core. Background Art

[0002] As a key device for interventional medicine, in angioplasty, the balloon dilatation catheter can not only pre-expand and shape the blood vessels, but also deliver the stent to the designated location and accurately shape it. The balloon in the balloon dilatation catheter is an expansion and shaping tool, which can be formed by a balloon molding device. At present, the balloon dilatation catheter used for angioplasty is mainly a single balloon dilatation catheter. Its working principle is that the balloon transports the vascular stent directly to the part of the blood vessel that needs to be expanded, and the balloon is inflated to expand the stent to complete the expansion and shaping of the blood vessel. In order to more smoothly transport the vascular stent to the embolization site where angioplasty is required, it is sometimes necessary to pre-expand the embolization blood vessel so that the stent can smoothly enter the embolization part, and the double balloon dilatation catheter came into being. The balloon part of the double balloon dilatation catheter consists of a main balloon and an auxiliary balloon. The main balloon is responsible for transporting the vascular stent, and the auxiliary balloon is responsible for pre-expanding the vascular embolization site before the stent is finalized, so that the main balloon can deliver the vascular stent to the vascular embolization site and expand and shape the stent.

[0003] However, with the existing axial split mold core technology, it is difficult to open the mold after the double-balloon blow molding is completed. Summary of the invention

[0004] The purpose of the present invention is to provide a double-balloon sleeve-type split mold core to solve the problem of mold opening and taking out after double-balloon blow molding.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a double-balloon sleeve type split mold core, including a sleeve, the right end of the sleeve is fixedly connected to a fixed mold, the left end of the sleeve is slidably connected to a movable mold, an upper split mold core and a lower split mold core are arranged between the fixed mold and the movable mold in the sleeve and are axially slidably connected to the sleeve, and a blank is arranged in the sleeve that passes through the movable mold, the upper split mold core, the lower split mold core, and the fixed mold in sequence.

[0006] Preferably, the outer side of the left portion of the fixed mold is fixedly connected to the inner side of the right end of the sleeve, and the third mold joining surface at the left end of the fixed mold is fitted with the right ends of the upper split mold core and the lower split mold core.

[0007] Preferably, a second mold joining surface is provided between the upper split mold core and the lower split mold core, and the upper split mold core and the lower split mold core are centrally symmetrical about their axes.

[0008] Preferably, a first balloon cavity is provided on the inner side of the left end of the upper split mold core, a second balloon cavity is provided on the right end of the upper split mold core, and air holes are provided at both ends of the upper split balloon.

[0009] Preferably, the first balloon mold cavity contains a main balloon of the parison, and the second balloon mold cavity contains an auxiliary balloon of the parison.

[0010] Preferably, the air holes at both ends of the upper split mold core are connected to the two ends of the upper split mold core through the inner sides of the first balloon cavity and the second balloon cavity respectively.

[0011] Preferably, the right end surface of the movable mold is a first mold joining surface, and the first mold joining surface is in contact with the left end surfaces of the upper split mold core and the lower split mold core.

[0012] Preferably, the movable mold and the fixed mold have the same shape, and the fixed mold includes a sleeve section whose outer diameter is the same as the inner diameter of the sleeve, the right end of the sleeve section is fixedly connected to the connecting section, and the right end of the connecting section is fixedly connected to the extension section. The outer diameters of the sleeve section, connecting section, and extension section decrease successively, and the inner diameters of the sleeve section, connecting section, and extension section are the same.

[0013] The beneficial effects of the present invention are:

[0014] In the present invention, firstly, a sleeve, a movable mold, a fixed mold, an upper split mold core and a lower split mold core are used to form a mold sleeve, and a parison is passed through the mold sleeve. After the double-balloon sleeve split mold core is molded, the parison is placed therein, and a double balloon is molded according to a control program of a balloon molding device to obtain a blow-molded double balloon. When the mold is opened, various parts of the mold can be separated step by step, and mold opening is convenient; secondly, the position of the mating surface of the double-balloon sleeve split mold core can be adjusted according to specific needs, and finished products of different specifications can be obtained by blow molding; finally, the air hole of the mold core is designed at the position of the mating surface of the split mold core to avoid the gas enclosed in the cavity affecting the double balloon molding quality during the blow molding process in the cavity of the double-balloon sleeve split mold core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a structural cross-sectional view of the present invention;

[0017] Figure 3 It is a structural cross-sectional view of the built-in parison of the present invention;

[0018] Figure 4 This is a schematic diagram of a quarter-section structure of the present invention;

[0019] Figure 5 This is a schematic diagram of a quarter-section structure of the present invention when the mold is opened;

[0020] Figure 6 It is a schematic diagram of a quarter-section structure of a split mold core of the present invention;

[0021] Figure numerals: 1. sleeve; 2. fixed mold; 201. third mating surface; 3. movable mold; 301. sleeve section; 302. connecting section; 303. extension section; 304. first mating surface; 4. upper split mold core; 401. first balloon cavity; 402. second balloon cavity; 403. air hole; 5. lower split mold core; 501. second mating surface; 6. parison; 7. main balloon; 8. auxiliary balloon; 9. double balloon catheter. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0023] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0024] Example 1

[0025] like Figure 1-6 As shown, a double-balloon sleeve type split mold core comprises a sleeve 1, wherein the right end of the sleeve 1 is fixedly connected to a fixed mold 2, the left end of the sleeve 1 is slidably connected to a movable mold 3, an upper split mold core 4 and a lower split mold core 5 which are axially slidably connected to the sleeve 1 are arranged between the fixed mold 2 and the movable mold 3 in the sleeve 1, a blank 6 which passes through the movable mold 3, the upper split mold core 4, the lower split mold core 5 and the fixed mold 2 in sequence is arranged in the sleeve 1, the outer side of the left part of the fixed mold 2 is fixedly connected to the inner side of the right end of the sleeve 1, the third mating surface 201 at the left end of the fixed mold 2 is fitted with the right ends of the upper split mold core 4 and the lower split mold core 5, a second mating surface 501 is arranged between the upper split mold core 4 and the lower split mold core 5, and the upper split mold core 4 and the lower split mold core 5 are centrally symmetrical about their axes.

[0026] When closing the mold, the second mold surface 501 of the upper split mold core 4 is fitted with the second mold surface 501 of the lower split mold core 5. At this time, the outer cross-sections of the upper split mold core 4 and the lower split mold core 5 are circular, and the inner sides of the upper split mold core 4 and the lower split mold core 5 form the shape of a double balloon catheter 9. Then, the merged split mold core is placed in the sleeve 1, so that the right end face of the sleeve 1 is fitted with the third mold surface 201 at the left end of the fixed mold 2. Then, the movable mold 3 is inserted into the sleeve 1, so that the first mold surface 304 of the movable mold 3 is fitted with the left end of the split mold core. Finally, the parison 6 is inserted from one end of the movable mold 3 until the parison 6 is flush with the right end of the fixed mold 2. The mold can be fixed on the blow molding equipment for blow molding.

[0027] Example 2

[0028] like Figure 1-6As shown, a double-balloon sleeve type split mold core comprises a sleeve 1, wherein the right end of the sleeve 1 is fixedly connected to a fixed mold 2, the left end of the sleeve 1 is slidably connected to a movable mold 3, an upper split mold core 4 and a lower split mold core 5 which are axially slidably connected to the sleeve 1 are arranged between the fixed mold 2 and the movable mold 3 in the sleeve 1, a blank 6 which passes through the movable mold 3, the upper split mold core 4, the lower split mold core 5 and the fixed mold 2 in sequence is arranged in the sleeve 1, a first balloon mold cavity 401 is arranged on the inner side of the left end of the upper split mold core 4, a second balloon mold cavity 402 is arranged on the right end of the upper split mold core 4, air holes 403 are arranged at both ends of the upper split balloon, a main balloon 7 of the blank 6 is built in the first balloon mold cavity 401, an auxiliary balloon 8 of the blank 6 is built in the second balloon mold cavity 402, and the air holes 403 at both ends of the upper split mold core 4 are respectively connected to the two ends of the upper split mold core 4 from the inner sides of the first balloon mold cavity 401 and the second balloon mold cavity 402.

[0029] The preform 6 is placed in the mold and blow-molded, and a double balloon catheter 9 is formed between the movable mold 3, the split mold core, the inside of the fixed mold 2 and the outside of the preform 6. A main balloon 7 is formed at the connection between the first balloon cavity 401 and the movable mold 3, and an auxiliary balloon 8 is formed at the connection between the second balloon cavity 402 and the fixed mold 2. A catheter connecting the main balloon 7 and the auxiliary balloon 8 is formed in the middle of the split mold core, and a catheter is formed by the connecting section 302 and the extended section of the movable mold 3. During blow molding, the gas can be discharged through the air hole 403 and the gap between the movable mold 3 and the sleeve 1, so as to avoid the gas enclosed in the cavity affecting the double balloon molding quality during the blow molding process in the double balloon sleeve 1 type split mold core cavity.

[0030] Example 3

[0031] like Figure 1-6 As shown, a double-balloon sleeve split mold core comprises a sleeve 1, wherein the right end of the sleeve 1 is fixedly connected to a fixed mold 2, and the left end of the sleeve 1 is slidably connected to a movable mold 3, and an upper split mold core 4 and a lower split mold core 5 which are axially slidably connected to the sleeve 1 are arranged between the fixed mold 2 and the movable mold 3 in the sleeve 1, and a blank 6 which passes through the movable mold 3, the upper split mold core 4, the lower split mold core 5, and the fixed mold 2 in sequence is arranged in the sleeve 1, and the right end surface of the movable mold 3 is a first mold surface 304, and the first mold surface 304 is a mold surface 305. Surface 304 is fitted with the left end surfaces of the upper split mold core 4 and the lower split mold core 5. The movable mold 3 and the fixed mold 2 have the same shape. The fixed mold 2 includes a sleeve section 301 whose outer diameter is the same as the inner diameter of the sleeve 1. The right end of the sleeve section 301 is fixedly connected to the connecting section 302. The right end of the connecting section 302 is fixedly connected to the extension section 303. The outer diameters of the sleeve section 301, the connecting section 302, and the extension section 303 decrease in sequence, and the inner diameters of the sleeve section 301, the connecting section 302, and the extension section 303 are the same.

[0032] When opening the mold, under the action of the axial driving force of the balloon molding equipment, the double-balloon sleeve 1 type split mold core movable mold 3 is separated first, and the remaining parts remain as one, and the double-balloon catheter 9 and the upper split mold core 4 and the lower split mold core 5 are taken out from the sleeve 1 as a whole, and then the upper split mold core 4 and the lower split mold core 5 are separated, and the double balloons can be taken out, and the mold opening is convenient.

[0033] Working principle: When the present invention is in use, the upper split mold core 4 and the lower split mold core 5 are first merged, and then the merged split mold core is placed in the sleeve 1 fixedly connected to the fixed mold 2, so that the split mold core and the third mating surface 201 of the fixed mold 2 are fitted, and then the movable mold 3 is inserted into the sleeve 1, so that the first mating surface 304 is fitted with the left end of the split mold core, and the blank 6 is inserted into the mold. The mold can be fixed in the balloon molding equipment control program in the prior art to form a double balloon. When opening the mold, the movable mold 3 is taken out, and then the finished product connected to the split mold core and the double balloon catheter 9 are taken out as a whole, and the split mold core can be separated, so that the finished product can be taken out of the mold more conveniently.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A double-balloon sleeve-type split mold core, comprising a sleeve (1), characterized in that: The right end of the sleeve (1) is fixedly connected to a fixed mold (2), the left end of the sleeve (1) is slidably connected to a movable mold (3), an upper split mold core (4) and a lower split mold core (5) are arranged between the fixed mold (2) and the movable mold (3) in the sleeve (1), and are axially slidably connected to the sleeve (1), and a parison (6) is arranged in the sleeve (1) and passes through the movable mold (3), the upper split mold core (4), the lower split mold core (5), and the fixed mold (2) in sequence; The outer side of the left part of the fixed mold (2) is fixedly connected to the inner side of the right end of the sleeve (1), and the third mold surface (201) at the left end of the fixed mold (2) is in contact with the right ends of the upper split mold core (4) and the lower split mold core (5); A second mold joining surface (501) is provided between the upper split mold core (4) and the lower split mold core (5), and the upper split mold core (4) and the lower split mold core (5) are centrally symmetrical about their axes; A first balloon cavity (401) is provided on the inner side of the left end of the upper split mold core (4), a second balloon cavity (402) is provided on the right end of the upper split mold core (4), and air holes (403) are provided at both ends of the upper split balloon; The air holes (403) at both ends of the upper split mold core (4) are respectively connected to the two ends of the upper split mold core (4) through the inner sides of the first balloon cavity (401) and the second balloon cavity (402); The right end surface of the movable mold (3) is a first mold surface (304), and the first mold surface (304) is in contact with the left end surfaces of the upper split mold core (4) and the lower split mold core (5).

2. A double-balloon sleeve split mold core according to claim 1, characterized in that: The first balloon cavity (401) contains a main balloon (7) of the preform (6), and the second balloon cavity (402) contains an auxiliary balloon (8) of the preform (6).

3. A double-balloon sleeve split mold core according to claim 2, characterized in that: The movable mold (3) and the fixed mold (2) have the same shape. The fixed mold (2) comprises a sleeve section (301) whose outer diameter is the same as the inner diameter of the sleeve (1). The right end of the sleeve section (301) is fixedly connected to the connecting section (302). The right end of the connecting section (302) is fixedly connected to the extension section (303). The outer diameters of the sleeve section (301), the connecting section (302) and the extension section (303) decrease in sequence. The inner diameters of the sleeve section (301), the connecting section (302) and the extension section (303) are the same.

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