Preparation device and preparation method of double-layer balloon

Abstract

The invention relates to the technical field of preparation of medical instruments, and particularly discloses a preparation device of a double-layer balloon. Comprising a shell which comprises an upper shell body and a lower shell body; the upper mold and the lower mold are connected with the shell, a first upper injection molding open groove, a second upper injection molding open groove, a third open hole and a first spiral pipe groove are formed in the upper mold, and a first lower injection molding open groove, a second lower injection molding open groove, a fourth open hole and a second spiral pipe groove are formed in the lower mold; the opening and closing mechanism comprises an electric push rod, a shielding plate and a spring, the shielding plate is provided with a ventilation hole and an annular feeding port, and the electric push rod drives the shielding plate to move; the air hole mechanism comprises an arc-shaped flow guide cover, and the diameter of the arc-shaped flow guide cover is wide in the upper portion and narrow in the lower portion. The defects that in the prior art, the preparation efficiency of the double-layer balloon is insufficient, and the preparation effect is poor are overcome.

Description

Technical Field

[0001] The present invention relates to the field of medical device preparation, and in particular to a preparation device and a preparation method of a double-layer balloon. Background Art

[0002] Balloon catheters are widely used in interventional procedures such as cardiovascular, urology, and digestive tract surgeries, such as angioplasty and stent implantation. The balloon expands the narrow or blocked area by inflation to restore blood flow or passage. It is usually manufactured by processes such as posting and thermoforming.

[0003] In the prior art, the preparation device of the double-layer balloon is usually prepared by injection mold, but the cooling performance of the injection mold is usually insufficient, which leads to poor cooling effect and poor work efficiency. At the same time, the preparation steps in the prior art need to be improved. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The problem to be solved by the present invention is to provide a double-layer balloon preparation device and a preparation method thereof, so as to overcome the defects of the double-layer balloon preparation process in the prior art that the preparation effect is poor and the preparation efficiency needs to be improved.

[0006] (II) Technical solution

[0007] In order to solve the technical problem, the first aspect of the present invention provides a double-layer balloon preparation device, which includes:

[0008] A housing, the housing comprising an upper housing and a lower housing, the upper housing having a first opening, and the lower housing having a second opening;

[0009] An upper mold, wherein the upper mold is arranged in the first opening, wherein the upper mold is provided with a first upper injection molding groove, a second upper injection molding groove, a third opening and a first spiral tube groove, wherein the third opening is located at the center of the upper mold, wherein the first upper injection molding groove is connected to the top end of the upper mold, and wherein the second upper injection molding groove is connected to the bottom end of the upper mold;

[0010] A lower mold, wherein the lower mold is arranged in the second opening, and a first lower injection molding groove, a second lower injection molding groove, a fourth opening and a second spiral tube groove are opened in the lower mold, wherein the fourth opening is located at the center of the lower mold, the first lower injection molding groove is connected to the top end of the lower mold, and the second lower injection molding groove is connected to the bottom end of the lower mold, and when the upper mold is connected to the lower mold, the first upper injection molding groove is connected to the first lower injection molding groove correspondingly, and the second upper injection molding groove is connected to the second lower injection molding groove correspondingly;

[0011] An opening and closing mechanism, the opening and closing mechanism comprising an electric push rod, a shield plate and a spring, the electric push rod being connected to the outer side of one end of the shell, the shield plate being connected to the electric push rod, one end of the spring being connected to the shield plate, the other end of the spring being connected to the inner side of the other end of the shell, and the shield plate being provided with ventilation holes and an annular feed port;

[0012] The wind hole mechanism includes an arc-shaped air guide cover, the diameter of the arc-shaped air guide cover is wide at the top and narrow at the bottom, a plurality of openings are arranged on the lower side of the arc-shaped air guide cover, the bottom end of the arc-shaped air guide cover is in contact with the shield plate, and the wind flow enters the arc-shaped air guide cover and is accelerated through the narrow end under the action of the Bernoulli principle to form an internal low-pressure area. The air in the high-pressure area converges into the arc-shaped air guide cover through the openings, and the wind flow passes through the third opening and the fourth opening.

[0013] As the preparation device for the double-layer balloon as described above, optionally, there are two cooling mechanisms, one of which is connected to the top end of the upper mold, and the other is connected to the bottom end of the lower mold, and the cooling mechanism includes a cooling shell, a cooler and a cooling rod, the cooling shell is annular, the cooling shell abuts against the mask plate, the cooler is arranged on the cooling shell, and the interior of the cooling shell is respectively connected to the first spiral tube groove and the second spiral tube groove.

[0014] As the preparation device of the double-layer balloon described above, optionally, the cooler includes a plurality of P-type semiconductors and a plurality of N-type semiconductors, the plurality of P-type semiconductors and the plurality of N-type semiconductors are distributed at intervals, and a cooling end and a heat release end are formed at both ends respectively, the cooling end is connected to one end of the cooling rod, and the other end of the cooling rod is connected to the interior of the cooling shell.

[0015] As for the device for preparing the double-layer balloon as described above, optionally, cooling oil is placed in the cooling shell, and a water pump is provided in the cooling mechanism.

[0016] As described above, in the device for preparing the double-layer balloon, optionally, the first upper injection molding groove, the second upper injection molding groove, the first lower injection molding groove, the second lower injection molding groove and the cooling shell are coaxial with the upper mold.

[0017] As described above, in the device for preparing the double-layer balloon, optionally, the diameter of the first upper injection molding groove is larger than that of the second upper injection molding groove, the first upper injection molding groove has the same diameter as the first lower injection molding groove, and the second upper injection molding groove has the same diameter as the second lower injection molding groove.

[0018] As the preparation device for the double-layer balloon as described above, optionally, the opening and closing mechanisms are two, and the two opening and closing mechanisms are respectively arranged at the top end of the upper mold and the bottom end of the lower mold, the annular feed port located at the upper mold is correspondingly connected to the first upper injection molding groove, the annular feed port located at the lower mold is correspondingly connected to the second lower injection molding groove, and the feeding mechanism is connected to the outer shell.

[0019] As the preparation device for the double-layer balloon as described above, optionally, the feeding mechanism is abutted against the mask plate, and the feeding mechanism includes a feeding channel, a feeding box and a rotating feeding plate, one end of the feeding channel is connected to the bottom end of the feeding box, and the other end of the feeding channel is connected to the annular feed port.

[0020] As the preparation device for the double-layer balloon as described above, optionally, a thread is provided on the inner wall of the feeding box, the rotating feeding plate is arranged in the feeding box, and the rotating feeding plate has a rotating handle, and when the rotating handle is rotated, the feeding mechanism feeds the material.

[0021] In order to achieve the aforementioned object, the second aspect of the present invention provides a method for using the preparation device of the double-layer balloon as described in any one of the first aspects of the present invention, wherein the method for using is as follows:

[0022] S1: The feeding mechanism starts and injection molding begins;

[0023] S2: The feeding mechanism is closed, the opening and closing mechanism is started, and the air hole mechanism and the cooling mechanism accelerate cooling;

[0024] S3: The molded part is hot-melted to complete the preparation of the double-layer balloon.

[0025] (III) Beneficial effects

[0026] The present invention provides a double-layer balloon preparation device and preparation method, and its beneficial effects are as follows:

[0027] (1) The present invention provides a third opening and a fourth opening at the center of the upper mold and the lower mold, and the third opening and the fourth opening are connected. With the cooperation of the air hole mechanism, the cooling of the injection molding material can be accelerated. Specifically, the wind flow enters the arc-shaped air guide cover, and under the action of the Bernoulli principle, it is accelerated through the narrow end to form an internal low-pressure area. The air in the high-pressure area converges into the arc-shaped air guide cover through the opening. At the same time, the water pump in the cooling mechanism controls the circulation of the cooling oil, and at the same time, the cooler cools the cooling oil. It assists in completing the accelerated cooling of the injection molding material, thereby improving the molding effect and the preparation efficiency.

[0028] (2) The present invention is provided with an opening and closing mechanism, which is switched by an electric push rod. The sizes of the annular feed opening in the opening and closing mechanism correspond to the first upper injection molding slot and the second lower injection molding slot, respectively. When the injection molding material needs to be fed, the injection molding material can enter from the annular feed opening. When the injection molding of the injection molding material is completed, the electric push rod drives the mask plate to move, the first upper injection molding slot and the second lower injection molding slot are closed, and the third opening and the vent are connected. The opening and closing mechanism can complete the switching of different modes.

[0029] (3) The present invention arranges a plurality of upper molds and a plurality of lower molds on the upper shell and the lower shell, so that a plurality of double-layer balloons can be prepared at one time, thereby improving the preparation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A three-dimensional diagram of a double-layer balloon preparation device and a preparation method thereof according to the present invention;

[0032] Figure 2 It is a partial stereoscopic diagram of a double-layer balloon preparation device and a preparation method thereof according to the present invention;

[0033] Figure 3 A cross-sectional view of a double-layer balloon preparation device and a preparation method thereof according to the present invention;

[0034] Figure 4 for Figure 3 A partial schematic diagram of the middle part;

[0035] Figure 5 A partial cross-sectional view of a double-layer balloon preparation device and a preparation method thereof according to the present invention;

[0036] Figure 6 for Figure 5 A partial schematic diagram of B in the middle;

[0037] Figure 7 The present invention is a cross-sectional view of an upper shell of a double-layer balloon preparation device and a preparation method thereof.

[0038] The names of the components corresponding to the various figure marks in the figure are: 1. shell; 11. upper shell; 12. lower shell; 13. first opening; 14. second opening; 2. upper mold; 21. first upper injection molding slot; 22. second upper injection molding slot; 23. third opening; 24. first spiral pipe slot; 3. lower mold; 31. first lower injection molding slot; 32. second lower injection molding slot; 33. fourth opening; 34. second spiral pipe slot; 4. opening and closing mechanism; 41. electric push rod; 42. shield plate; 43. spring; 44. ventilation hole; 45. annular feed port; 5. air hole mechanism; 51. arc guide cover; 6. cooling mechanism; 61. cooling shell; 62. cooler; 63. cooling rod; 7. feeding mechanism; 71. feeding channel; 72. feeding box; 73. rotating feed plate; 74. rotating handle. DETAILED DESCRIPTION

[0039] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0041] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0042] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0044] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0045] See also Figures 1 to 7 The present invention provides a preparation device for a double-layer balloon, which includes a shell 1, an upper mold 2, a lower mold 3, an opening and closing mechanism 4, an air hole mechanism 5, a cooling mechanism 6 and a feeding mechanism 7. The upper mold 2 and the lower mold 3 are arranged in the shell 1, and the opening and closing mechanism 4 is arranged on the upper mold 2 and the lower mold 3. The air hole mechanism 5 is connected to the air hole channel, and the opening and closing mechanism 4 is used to control the opening and closing of the injection channel and the air hole channel. The cooling mechanism 6 is respectively arranged in the upper mold 2 and the lower mold 3, and is used to accelerate the cooling molding after injection molding. The feeding mechanism 7 is used to inject the material into the mold.

[0046] exist Figures 1 to 7 In an optional embodiment, the housing 1 includes an upper shell 11 and a lower shell 12 , the upper shell 11 is provided with a first opening 13 , and the lower shell 12 is provided with a second opening 14 .

[0047] Further, the upper mold 2 is arranged in the first opening 13, and the upper mold 2 is provided with a first upper injection molding slot 21, a second upper injection molding slot 22, a third opening 23 and a first spiral tube slot 24. The lower mold 3 is arranged in the second opening 14, and the lower mold 3 is provided with a first lower injection molding slot 31, a second lower injection molding slot 32, a fourth opening 33 and a second spiral tube slot 34.

[0048] The upper mold 2 and the lower mold 3 can be separated / combined. A sealing notch is provided at the bottom end of the upper mold 2 and the bottom end of the lower mold 3, and an O-shaped sealing ring is provided in the sealing notch. When the upper mold 2 and the lower mold 3 are combined, the O-shaped sealing ring is used to play a better sealing role to ensure that the injection liquid does not flow out.

[0049] It should be noted that the third opening 23 is located at the center of the upper mold 2, the first upper injection molding groove 21 is connected to the top of the upper mold 2, and the second upper injection molding groove 22 is connected to the bottom of the upper mold 2. The fourth opening 33 is located at the center of the lower mold 3, the first lower injection molding groove 31 is connected to the top of the lower mold 3, and the second lower injection molding groove 32 is connected to the bottom of the lower mold 3.

[0050] Therefore, when the upper mold 2 is connected to the lower mold 3 , the first upper injection molding groove 21 is connected to the first lower injection molding groove 31 correspondingly, and the second upper injection molding groove 22 is connected to the second lower injection molding groove 32 correspondingly.

[0051] Furthermore, the diameter of the first upper injection molding groove 21 is larger than that of the second upper injection molding groove 22 , the first upper injection molding groove 21 and the first lower injection molding groove 31 have the same diameter, and the second upper injection molding groove 22 and the second lower injection molding groove 32 have the same diameter.

[0052] Furthermore, the injection material can be respectively inputted into the first upper injection molding groove 21 and the second lower injection molding groove 32 from the top end of the upper mold 2 and the bottom end of the lower mold 3, thereby completing the injection molding.

[0053] Furthermore, the first upper injection molding groove 21 , the second upper injection molding groove 22 , the first lower injection molding groove 31 , the second lower injection molding groove 32 and the cooling shell 61 are coaxial with the upper mold 2 .

[0054] exist Figures 1 to 7 In an optional embodiment, the opening and closing mechanism 4 includes an electric push rod 41, a shield plate 42 and a spring 43. The electric push rod 41 is connected to the outer side of one end of the housing 1, the shield plate 42 is connected to the electric push rod 41, one end of the spring 43 is connected to the shield plate 42, and the other end of the spring 43 is connected to the inner side of the other end of the housing 1, and the shield plate 42 is provided with a ventilation hole 44 and an annular feed port 45.

[0055] Specifically, when the device needs to be fed, the injection plastic can enter from the annular feed port 45. When the feeding is completed, the electric push rod 41 drives the shield plate 42 to move, the ventilation hole 44 aligns with the third opening 23, and blocks the entry of the injection plastic.

[0056] Furthermore, there are two opening and closing mechanisms 4, which are respectively arranged at the top end of the upper mold 2 and the bottom end of the lower mold 3. The annular feed port 45 located at the upper mold 2 is correspondingly connected to the first upper injection molding groove 21, and the annular feed port 45 located at the lower mold 3 is correspondingly connected to the second lower injection molding groove 32, and the feeding mechanism 7 is connected to the outer shell 1.

[0057] exist Figures 1 to 7In an optional embodiment, the wind hole mechanism 5 includes an arc-shaped air guide cover 51, the diameter of the arc-shaped air guide cover 51 is wide at the top and narrow at the bottom, and a plurality of openings are arranged on the lower side of the arc-shaped air guide cover 51. The bottom end of the arc-shaped air guide cover 51 abuts against the shield plate 42. The windflow enters the arc-shaped air guide cover 51, and is accelerated through the narrow end under the action of the Bernoulli principle to form an internal low-pressure zone. The air in the high-pressure zone converges into the arc-shaped air guide cover 51 through the openings, and the windflow passes through the third opening 23 and the fourth opening 33.

[0058] exist Figures 1 to 7 In an optional embodiment, there are two cooling mechanisms 6, one cooling mechanism 6 is connected to the top end of the upper mold 2, and the other cooling mechanism 6 is connected to the bottom end of the lower mold 3. The cooling mechanism 6 includes a cooling shell 61, a cooler 62 and a cooling rod 63. The cooling shell 61 is annular, and the cooling shell 61 abuts against the mask plate 42. The cooler 62 is arranged on the cooling shell 61. The interior of the cooling shell 61 is respectively connected to the first spiral pipe groove 24 and the second spiral pipe groove 34.

[0059] Furthermore, the cooler 62 includes multiple P-type semiconductors and multiple N-type semiconductors, which are distributed at intervals and have a cooling end and a heat release end at both ends, respectively. The cooling end is connected to one end of the cooling rod 63, and the other end of the cooling rod 63 is connected to the interior of the cooling shell 61.

[0060] Furthermore, cooling oil is placed in the cooling shell 61 , and a water pump is provided in the cooling mechanism 6 .

[0061] It should be noted that the water pump drives the cooling oil to circulate in the first spiral pipe groove 24 and the second spiral pipe groove 34, thereby playing a cooling role.

[0062] Furthermore, the feeding mechanism 7 is abutted against the mask plate 42 , and the feeding mechanism 7 includes a feeding channel 71 , a feeding box 72 and a rotating feeding plate 73 , one end of the feeding channel 71 is connected to the bottom end of the feeding box 72 , and the other end of the feeding channel 71 is connected to the annular feed port 45 .

[0063] Furthermore, a thread is provided on the inner wall of the loading box 72 , and a rotating feeding plate 73 is provided in the loading box 72 . A rotating handle 74 is provided on the rotating feeding plate 73 . When the rotating handle 74 is rotated, the loading mechanism 7 loads the material.

[0064] Another aspect of the present invention provides a method for using the double-layer balloon preparation device as described above, wherein the method for using is as follows:

[0065] S1: The feeding mechanism 7 is started and injection molding begins.

[0066] The feeding mechanism 7 is started, the rotary feed plate 73 rotates, and the injection plastic enters the first upper injection molding groove 21 and the second lower injection molding groove 32 respectively through the annular feed port 45 under the action of the thread, until the injection plastic is filled.

[0067] S2: The feeding mechanism 7 is closed, the opening and closing mechanism 4 is started, and the air hole mechanism 5 and the cooling mechanism 6 accelerate cooling.

[0068] When the injection molding material is filled, the feeding mechanism 7 stops rotating, the opening and closing mechanism 4 starts, the shield plate 42 moves under the drive of the electric push rod 41, the spring 43 deforms accordingly, and the vent 44 is aligned with the third opening 23, so that the wind can flow into the opening under the aggregation of the vent mechanism 5, thereby accelerating the cooling. At the same time, the cooling mechanism 6 acts at the same time, the water pump controls the circulation of the cooling oil, and the cooler 62 cools the cooling oil, which assists in completing the accelerated cooling of the injection molding material.

[0069] S3: The molded part is hot-melted to complete the preparation of the double-layer balloon.

[0070] After the injection molding material has been cooled, the upper shell 11 and the lower shell 12 are separated, the injection molding material is taken out, and the double-layer injection molding material is connected to the central rod by hot melting, thereby completing the preparation of the double-layer balloon.

[0071] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0072] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A double-layer balloon preparation device, characterized in that: include: A housing (1), the housing (1) comprising an upper housing (11) and a lower housing (12), the upper housing (11) being provided with a first opening (13), and the lower housing (12) being provided with a second opening (14); An upper mold (2), wherein the upper mold (2) is arranged in a first opening (13); a first upper injection molding groove (21), a second upper injection molding groove (22), a third opening (23) and a first spiral tube groove (24) are provided in the upper mold (2); the third opening (23) is located at the center of the upper mold (2); the first upper injection molding groove (21) is connected to the top end of the upper mold (2); and the second upper injection molding groove (22) is connected to the bottom end of the upper mold (2); A lower mold (3), wherein the lower mold (3) is arranged in the second opening (14), and a first lower injection molding groove (31), a second lower injection molding groove (32), a fourth opening (33) and a second spiral tube groove (34) are provided in the lower mold (3), wherein the fourth opening (33) is located at the center of the lower mold (3), the first lower injection molding groove (31) is connected to the top end of the lower mold (3), and the second lower injection molding groove (32) is connected to the bottom end of the lower mold (3), and when the upper mold (2) is connected to the lower mold (3), the first upper injection molding groove (21) is connected to the first lower injection molding groove (31) correspondingly, and the second upper injection molding groove (22) is connected to the second lower injection molding groove (32) correspondingly; an opening and closing mechanism (4), the opening and closing mechanism (4) comprising an electric push rod (41), a shield plate (42) and a spring (43); the electric push rod (41) is connected to the outer side of one end of the housing (1); the shield plate (42) is connected to the electric push rod (41); one end of the spring (43) is connected to the shield plate (42); the other end of the spring (43) is connected to the inner side of the other end of the housing (1); and the shield plate (42) is provided with a ventilation hole (44) and an annular feed port (45); A wind hole mechanism (5), the wind hole mechanism (5) comprising an arc-shaped air guide cover (51), the diameter of the arc-shaped air guide cover (51) being wider at the top and narrower at the bottom, a plurality of openings being arranged on the lower side of the arc-shaped air guide cover (51), the bottom end of the arc-shaped air guide cover (51) being in contact with the shield plate (42), and the wind flow entering the arc-shaped air guide cover (51) is accelerated through the narrow end under the action of the Bernoulli principle to form an internal low-pressure area, and the air in the high-pressure area is aggregated into the arc-shaped air guide cover (51) through the openings, and the wind flow passes through the third opening (23) and the fourth opening (33).

2. The double-layer balloon preparation device according to claim 1, characterized in that: There are two cooling mechanisms (6), one of which is connected to the top end of the upper mold (2), and the other is connected to the bottom end of the lower mold (3). The cooling mechanism (6) includes a cooling shell (61), a cooler (62) and a cooling rod (63). The cooling shell (61) is annular, and the cooling shell (61) is in contact with the mask plate (42). The cooler (62) is arranged on the cooling shell (61). The interior of the cooling shell (61) is respectively connected to the first spiral tube groove (24) and the second spiral tube groove (34).

3. The double-layer balloon preparation device according to claim 2, characterized in that: The cooler (62) includes a plurality of P-type semiconductors and a plurality of N-type semiconductors, the plurality of P-type semiconductors and the plurality of N-type semiconductors are distributed at intervals, and a cooling end and a heat release end are formed at both ends respectively, the cooling end is connected to one end of the cooling rod (63), and the other end of the cooling rod (63) is connected to the inside of the cooling shell (61).

4. The double-layer balloon preparation device according to claim 2, characterized in that: Cooling oil is placed in the cooling shell (61), and a water pump is provided in the cooling mechanism (6).

5. The double-layer balloon preparation device according to claim 1, characterized in that: The first upper injection molding groove (21), the second upper injection molding groove (22), the first lower injection molding groove (31), the second lower injection molding groove (32) and the cooling shell (61) are coaxial with the upper mold (2).

6. The double-layer balloon preparation device according to claim 1, characterized in that: The diameter of the first upper injection molding groove (21) is larger than that of the second upper injection molding groove (22); the first upper injection molding groove (21) and the first lower injection molding groove (31) have the same diameter; and the second upper injection molding groove (22) and the second lower injection molding groove (32) have the same diameter.

7. The double-layer balloon preparation device according to claim 1, characterized in that: The opening and closing mechanisms (4) are provided with two, and the two opening and closing mechanisms (4) are respectively arranged at the top end of the upper mold (2) and the bottom end of the lower mold (3); the annular feed port (45) located at the upper mold (2) is correspondingly connected to the first upper injection molding groove (21); the annular feed port (45) located at the lower mold (3) is correspondingly connected to the second lower injection molding groove (32); and the feeding mechanism (7) is connected to the housing (1).

8. The double-layer balloon preparation device according to claim 7, characterized in that: The feeding mechanism (7) is in contact with the mask plate (42), and comprises a feeding channel (71), a feeding box (72) and a rotating feeding plate (73), one end of the feeding channel (71) is connected to the bottom end of the feeding box (72), and the other end of the feeding channel (71) is connected to the annular feeding port (45).

9. The double-layer balloon preparation device according to claim 8, characterized in that: The inner wall of the loading box (72) is provided with a thread, the rotating feeding plate (73) is arranged in the loading box (72), and the rotating feeding plate (73) is provided with a rotating handle (74). When the rotating handle (74) is rotated, the loading mechanism (7) loads the material.

10. A method for using the double-layer balloon preparation device according to any one of claims 1 to 9, characterized in that: The method of use is as follows: S1: The feeding mechanism (7) is started and injection molding begins; S2: the feeding mechanism (7) is closed, the opening and closing mechanism (4) is started, and the air hole mechanism (5) and the cooling mechanism (6) accelerate cooling; S3: The molded part is hot-melted to complete the preparation of the double-layer balloon.

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