Preparation device and preparation method of double-layer balloon

Abstract

The application relates to the technical field of medical instrument preparation, and particularly discloses a preparation device for a double-layer balloon. The device comprises a shell, an upper die and a lower die connected with the shell, a first upper injection molding slot, a second upper injection molding slot, a third hole and a first spiral pipe groove are arranged in the upper die, a first lower injection molding slot, a second lower injection molding slot, a fourth hole and a second spiral pipe groove are arranged in the lower die, an opening and closing mechanism, the opening and closing mechanism comprises an electric push rod, a cover plate and a spring, the cover plate is provided with a ventilation hole and an annular feeding port, and the electric push rod drives the cover plate to move, and a wind hole mechanism, the wind hole mechanism comprises an arc-shaped flow guide cover, and the diameter of the arc-shaped flow guide cover is wide at the top and narrow at the bottom. The application overcomes the defects of low preparation efficiency and poor preparation effect of the double-layer balloon in the prior art.

Description

TECHNICAL FIELD

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

[0002] Balloon catheters are widely used in cardiovascular, urinary, digestive tract and other interventional surgeries, such as angioplasty, stent implantation, etc. The balloon expands the narrow or blocked part by inflation to restore blood flow or passage. It is usually prepared by injection, thermoforming and other processes.

[0003] In the prior art, the preparation device of the double-layer balloon is usually prepared by using an injection mold, but the cooling performance of the injection mold is usually insufficient, which leads to poor cooling effect and low work efficiency. Meanwhile, the preparation steps in the prior art need to be improved. SUMMARY

[0004] (I) Technical problem to be solved

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

[0006] (II) Technical solution

[0007] To solve the technical problem, the first aspect of the present application provides a preparation device of a double-layer balloon, which comprises:

[0008] An outer shell comprising an upper shell and a lower shell, the upper shell being provided with a first opening, and the lower shell being provided with a second opening;

[0009] An upper mold arranged in the first opening, the upper mold being provided with a first upper injection slot, a second upper injection slot, a third opening and a first spiral pipe slot, the third opening being located at the center of the upper mold, the first upper injection slot being in communication with the top end of the upper mold, and the second upper injection slot being in communication with the bottom end of the upper mold;

[0010] A lower mold arranged in the second opening, the lower mold being provided with a first lower injection slot, a second lower injection slot, a fourth opening and a second spiral pipe slot, the fourth opening being located at the center of the lower mold, the first lower injection slot being in communication with the top end of the lower mold, and the second lower injection slot being in communication with the bottom end of the lower mold, when the upper mold and the lower mold are connected, the first upper injection slot and the first lower injection slot are connected correspondingly, and the second upper injection slot and the second lower injection slot are connected correspondingly;

[0011] The opening and closing mechanism comprises an electric push rod, a cover plate and a spring, the electric push rod is connected with the outside of one end of the shell, the cover plate is connected with the electric push rod, one end of the spring is connected with the cover plate, and the other end of the spring is connected with the inside of the other end of the shell, and the cover plate is provided with a ventilation hole and an annular feeding port.

[0012] The air hole mechanism comprises an arc-shaped fairing, the diameter of the arc-shaped fairing is wide at the top and narrow at the bottom, the lower side of the arc-shaped fairing is provided with a plurality of openings, and the bottom end of the arc-shaped fairing abuts against the cover plate; air flow enters the arc-shaped fairing, accelerates through the narrow end under the action of Bernoulli's principle, forms an internal low-pressure area, and air in the high-pressure area is aggregated into the arc-shaped fairing through the openings; and the air flow passes through the third opening and the fourth opening.

[0013] The preparation device of the double-layer balloon as described above, optionally, the cooling mechanism has two, one of the cooling mechanisms is connected with the top end of the upper mold, and the other of the cooling mechanisms is connected with the bottom end of the lower mold; the cooling mechanism comprises a cooling shell, a cooler and a cooling rod, the cooling shell is annular, the cooling shell abuts against the cover plate, the cooler is arranged on the cooling shell, and the inside of the cooling shell is in communication with the first spiral pipe groove and the second spiral pipe groove respectively.

[0014] The preparation device of the double-layer balloon as described above, optionally, the cooler comprises 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 are respectively formed with a refrigeration end and a heat dissipation end at two ends, the refrigeration end is connected with one end of the cooling rod, and the other end of the cooling rod is connected with the inside of the cooling shell.

[0015] The preparation device of the double-layer balloon as described above, optionally, cooling oil is placed in the cooling shell, and a water pump is arranged in the cooling mechanism.

[0016] The preparation device of the double-layer balloon as described above, optionally, the first upper injection molding slot, the second upper injection molding slot, the first lower injection molding slot, the second lower injection molding slot and the cooling shell are coaxial with the upper mold.

[0017] The preparation device of the double-layer balloon as described above, optionally, the diameter of the first upper injection molding slot is greater than that of the second upper injection molding slot, the first upper injection molding slot and the first lower injection molding slot are the same in size and diameter, and the second upper injection molding slot and the second lower injection molding slot are the same in size and diameter.

[0018] The preparation device of the double-layer balloon as described above, optionally, the opening and closing mechanism has two, two opening and closing mechanisms are arranged at the top end of the upper mold and the bottom end of the lower mold, the annular feeding port at the upper mold is connected with the first upper injection slot, the annular feeding port at the lower mold is connected with the second lower injection slot, and the feeding mechanism is connected with the shell.

[0019] The preparation device of the double-layer balloon as described above, optionally, the feeding mechanism is in abutment with the cover plate, the feeding mechanism comprises a feeding channel, a feeding box and a rotating feeding plate, one end of the feeding channel is connected with the bottom end of the feeding box, and the other end of the feeding channel is connected with the annular feeding port.

[0020] The preparation device of the double-layer balloon as described above, optionally, the inner wall of the feeding box is provided with threads, the rotating feeding plate is arranged in the feeding box, the rotating feeding plate is provided with a rotating handle, and the feeding mechanism feeds when the rotating handle is rotated.

[0021] In order to achieve the foregoing purpose, a second aspect of the present application provides a use method of the preparation device of the double-layer balloon, wherein the use method is as follows:

[0022] S1: the feeding mechanism is started, and injection molding is started;

[0023] S2: the feeding mechanism is closed, the opening and closing mechanism is started, the air hole mechanism and the cooling mechanism are accelerated to cool;

[0024] S3: the formed part is hot-melted, and the double-layer balloon is prepared.

[0025] (Three) beneficial effects

[0026] The present application provides a preparation device of a double-layer balloon and a preparation method thereof, and has the following beneficial effects:

[0027] (1) The third opening and the fourth opening are arranged at the center positions of the upper mold and the lower mold, the third opening and the fourth opening are communicated, and the injection molding material can be accelerated to cool under the cooperation of the air hole mechanism. Specifically, air flows into the arc-shaped flow guide cover, is accelerated through the narrow end under the action of the Bernoulli principle, forms an internal low-pressure area, and air located in a high-pressure area is aggregated into the arc-shaped flow guide cover through the opening. Meanwhile, the water pump in the cooling mechanism controls the circulation of the cooling oil, and the cooler cools the cooling oil. The accelerated cooling of the injection molding material is assisted to complete, and the forming effect and the preparation efficiency are improved.

[0028] (2) The application is provided with an opening and closing mechanism, which is switched by an electric push rod, and the size of the annular feed inlet in the opening and closing mechanism corresponds 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 inlet. When the injection molding is completed, the electric push rod drives the cover plate to move, the first upper injection molding slot and the second lower injection molding slot are closed, and the third opening and the ventilation opening are communicated, and different modes can be switched through the opening and closing mechanism.

[0029] (3) The application can complete the preparation of multiple double-layer balloons at one time by arranging multiple upper molds and lower molds on the upper shell and the lower shell, thereby improving the preparation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 It is a perspective view of the preparation device and preparation method of the double-layer balloon of the present application;

[0032] Figure 2 It is a partial perspective view of the preparation device and preparation method of the double-layer balloon of the present application;

[0033] Figure 3 It is a sectional view of the preparation device and preparation method of the double-layer balloon of the present application;

[0034] Figure 4 It is a sectional view of the preparation device and preparation method of the double-layer balloon of the present application; Figure 3 It is a partial schematic view of A in the present application;

[0035] Figure 5 It is a partial sectional view of the preparation device and preparation method of the double-layer balloon of the present application;

[0036] Figure 6 It is a sectional view of the preparation device and preparation method of the double-layer balloon of the present application; Figure 5 It is a partial schematic view of B in the present application;

[0037] Figure 7 It is a sectional view of the upper shell of the preparation device and preparation method of the double-layer balloon of the present application.

[0038] Corresponding component names of various reference numerals in the figures are as follows: 1, outer 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, cover plate; 43, spring; 44, air vent; 45, annular feeding port; 5, air hole mechanism; 51, arc-shaped flow guide cover; 6, cooling mechanism; 61, cooling shell; 62, cooler; 63, cooling rod; 7, feeding mechanism; 71, feeding channel; 72, feeding box; 73, rotating feeding plate; 74, rotating handle. DETAILED DESCRIPTION

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

[0040] The embodiments of this application are illustrated by way of example with reference to the following figures wherein:

[0041] It is to be understood that the ranges mentioned herein include the whole range located between the lower limit and the upper limit of the ranges. It is to be further understood that the description of a variable or parameter prefaced by the word "about" discloses also the exact value of the variable or parameter. Also, it is to be understood that the terminology in such a case has no limitations to its meaning and is just meant to simplify the disclosure. It is to be further understood that the disclosure of an upper or lower limit to a variable or parameter discloses also the other limit to the variable or parameter. Also, it is to be understood that the terminology in such a case has no limitations to its meaning and is just meant to simplify the disclosure.

[0042] It is also need to be explained that the figures provided in the following embodiments only illustrate the basic ideas of the present application in a schematic way, and only the components related to the present application are shown in the figures, not the components number, shape and size when actually implemented, the actual implementation of each component type, number and proportion can be a random change, and its component layout type can be more complex.

[0043] In addition, in the following description, specific details are provided in order to facilitate a thorough understanding of the examples. However, one skilled in the relevant art will understand that the examples can be practiced without these specific details.

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

[0045] Referring to Figures 1 to 7 The present application provides a preparation device of a double-layer balloon, which comprises an outer shell 1, an upper mold 2, a lower mold 3, an opening and closing mechanism 4, a vent mechanism 5, a cooling mechanism 6 and a feeding mechanism 7. The upper mold 2 and the lower mold 3 are arranged in the outer shell 1, and the opening and closing mechanism 4 is arranged on the upper mold 2 and the lower mold 3. The vent mechanism 5 is in communication with a vent channel, and the opening and closing mechanism 4 is used for controlling the opening and closing of an injection channel and the vent channel. The cooling mechanism 6 is arranged in the upper mold 2 and the lower mold 3 respectively, and is used for accelerating the cooling forming after injection. The feeding mechanism 7 is used for injecting materials into the mold.

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

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

[0048] The upper mold 2 and the lower mold 3 can be split / combined. A sealing groove is arranged 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 arranged in the sealing groove. 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, so as to prevent the injection liquid from flowing out.

[0049] It should be noted that the third opening 23 is located in the center of the upper mold 2, the first upper injection slot 21 is communicated with the top end of the upper mold 2, and the second upper injection slot 22 is communicated with the bottom end of the upper mold 2. The fourth opening 33 is located in the center of the lower mold 3, the first lower injection slot 31 is communicated with the top end of the lower mold 3, and the second lower injection slot 32 is communicated with the bottom end of the lower mold 3.

[0050] Therefore, when the upper mold 2 is connected with the lower mold 3, the first upper injection slot 21 is connected with the first lower injection slot 31 in correspondence, and the second upper injection slot 22 is connected with the second lower injection slot 32 in correspondence.

[0051] Further, the diameter of the first upper injection slot 21 is greater than that of the second upper injection slot 22, the first upper injection slot 21 and the first lower injection slot 31 are the same in size and diameter, and the second upper injection slot 22 and the second lower injection slot 32 are the same in size and diameter.

[0052] Further, the injection material can be input into the first upper injection slot 21 and the second lower injection slot 32 from the top end of the upper mold 2 and the bottom end of the lower mold 3 respectively, so as to complete the injection.

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

[0054] In Figures 1 to 7 In an optional embodiment, the opening and closing mechanism 4 comprises an electric push rod 41, a cover plate 42 and a spring 43. The electric push rod 41 is connected with the outside of one end of the shell 1, the cover plate 42 is connected with the electric push rod 41, one end of the spring 43 is connected with the cover plate 42, and the other end of the spring 43 is connected with the inside of the other end of the shell 1. The cover plate 42 is provided with a ventilation hole 44 and an annular feeding port 45.

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

[0056] Further, the opening and closing mechanism 4 has 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 feeding port 45 located at the upper mold 2 is connected with the first upper injection slot 21 in correspondence, the annular feeding port 45 located at the lower mold 3 is connected with the second lower injection slot 32 in correspondence, and the feeding mechanism 7 is connected with the shell 1.

[0057] In Figures 1 to 7In an optional embodiment, the air hole mechanism 5 comprises an arc-shaped fairing 51, the arc-shaped fairing 51 is wide at the top and narrow at the bottom, the bottom end of the arc-shaped fairing 51 is in abutment with the cover plate 42, the air flow enters the arc-shaped fairing 51, and under the action of the Bernoulli principle, the air flow is accelerated through the narrow end to form an internal low-pressure area, and the air in the high-pressure area is aggregated into the arc-shaped fairing 51 through the openings.

[0058] In Figures 1 to 7 In an optional embodiment, the cooling mechanism 6 has two, one cooling mechanism 6 is connected with the top end of the upper mold 2, and the other cooling mechanism 6 is connected with the bottom end of the lower mold 3, the cooling mechanism 6 comprises a cooling shell 61, a cooler 62 and a cooling rod 63, the cooling shell 61 is annular, the cooling shell 61 is in abutment with the cover plate 42, the cooler 62 is arranged on the cooling shell 61, and the inside of the cooling shell 61 is in communication with the first coil pipe groove 24 and the second coil pipe groove 34 respectively.

[0059] Further, the cooler 62 comprises 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 respectively formed with a refrigeration end and a heat dissipation end at two ends, the refrigeration end is connected with one end of the cooling rod 63, and the other end of the cooling rod 63 is connected with the inside of the cooling shell 61.

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

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

[0062] Further, the feeding mechanism 7 is in abutment with the cover plate 42, the feeding mechanism 7 comprises a feeding channel 71, a feeding box 72 and a rotating feeding plate 73, one end of the feeding channel 71 is connected with the bottom end of the feeding box 72, and the other end of the feeding channel 71 is connected with the annular feeding port 45.

[0063] Further, the inner wall of the feeding box 72 is provided with threads, the rotating feeding plate 73 is arranged in the feeding box 72, the rotating feeding plate 73 is provided with a rotating handle 74, and when the rotating handle 74 is rotated, the feeding mechanism 7 feeds.

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

[0065] S1: The feeding mechanism 7 is started to start injection molding.

[0066] The feeding mechanism 7 is started, and the rotating feeding plate 73 rotates. Under the action of the screw thread, the injection material enters the first upper injection slot 21 and the second lower injection slot 32 through the annular feeding port 45, respectively, until the injection material is filled.

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

[0068] When the injection material is filled, the feeding mechanism 7 stops rotating, the opening and closing mechanism 4 is started, the cover plate 42 moves under the drive of the electric push rod 41, the spring 43 deforms, the air hole 44 is aligned with the third opening 23, therefore, the air flow can flow into the opening under the aggregation of the air hole mechanism 5, thereby accelerating cooling. At the same time, the cooling mechanism 6 acts simultaneously, the water pump controls the circulation of the cooling oil, at the same time, the cooler 62 cools the cooling oil. Assist to complete the accelerated cooling of the injection material.

[0069] S3: The molded part is hot-melted, and a double-layer balloon is prepared.

[0070] When the injection material is cooled, the upper shell 11 and the lower shell 12 are separated, the injection material is taken out, and the double-layer injection material is connected with the center rod by hot-melting, thereby completing the preparation of the double-layer balloon.

[0071] In the specification, the same or similar parts between various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0072] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for preparing a double-layered balloon, characterized in that, include: The outer shell (1) includes an upper shell (11) and a lower shell (12). The upper shell (11) has a first opening (13) and the lower shell (12) has a second opening (14). The upper mold (2) is disposed in the first opening (13). The upper mold (2) has a first upper injection groove (21), a second upper injection groove (22), a third opening (23) and a first spiral tube groove (24). The third opening (23) is located at the center of the upper mold (2). The first upper injection groove (21) is connected to the top of the upper mold (2), and the second upper injection groove (22) is connected to the bottom of the upper mold (2). The lower mold (3) is disposed in the second opening (14). The lower mold (3) has a first lower injection groove (31), a second lower injection groove (32), a fourth opening (33) and a second spiral tube groove (34). The fourth opening (33) is located at the center of the lower mold (3). The first lower injection groove (31) is connected to the top of the lower mold (3), and the second lower injection groove (32) is connected to the bottom of the lower mold (3). When the upper mold (2) is connected to the lower mold (3), the first upper injection groove (21) is connected to the first lower injection groove (31), and the second upper injection groove (22) is connected to the second lower injection groove (32). The opening and closing mechanism (4) includes an electric push rod (41), a cover plate (42) and a spring (43). The electric push rod (41) is connected to the outer side of one end of the outer shell (1), the cover plate (42) is connected to the electric push rod (41), one end of the spring (43) is connected to the cover plate (42), and the other end of the spring (43) is connected to the inner side of the other end of the outer shell (1). The cover plate (42) is provided with a ventilation hole (44) and an annular feed port (45). The air vent mechanism (5) includes an arc-shaped air guide shroud (51). The arc-shaped air guide shroud (51) is wider at the top and narrower at the bottom. Multiple openings are provided on the lower side of the arc-shaped air guide shroud (51). The bottom end of the arc-shaped air guide shroud (51) abuts against the shield plate (42). The airflow enters the arc-shaped air guide shroud (51). Under the action of Bernoulli's principle, the airflow is accelerated through the narrow end to form an internal low-pressure zone. The air in the high-pressure zone converges into the arc-shaped air guide shroud (51) through the openings. The airflow passes through the third opening (23) and the fourth opening (33). The opening and closing mechanism (4) has two parts. The two opening and closing mechanisms (4) are respectively set at the top of the upper mold (2) and the bottom of the lower mold (3). The annular feed port (45) located at the upper mold (2) can be connected to the first upper injection groove (21), and the annular feed port (45) located at the lower mold (3) can be connected to the second lower injection groove (32).

2. The apparatus for preparing a double-layered balloon as described in claim 1, characterized in that, It has two cooling mechanisms (6), one of which is connected to the top of the upper mold (2) and the other is connected to the bottom 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 abuts against the shield plate (42). The cooler (62) is disposed on the cooling shell (61). The interior of the cooling shell (61) is connected to the first spiral tube groove (24) and the second spiral tube groove (34) respectively.

3. The apparatus for preparing a double-layered balloon as described in claim 2, characterized in that, The cooler (62) includes multiple P-type semiconductors and multiple N-type semiconductors, which are spaced apart and have a cooling end and a heat dissipation end formed at both ends. 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).

4. The apparatus for preparing a double-layered balloon as described in claim 2, characterized in that, Cooling oil is placed in the cooling housing (61), and a water pump is provided in the cooling mechanism (6).

5. The apparatus for preparing a double-layered balloon as described in claim 2, characterized in that, The first upper injection groove (21), the second upper injection groove (22), the first lower injection groove (31), the second lower injection groove (32), and the cooling shell (61) are coaxial with the upper mold (2).

6. The apparatus for preparing a double-layered balloon as described in claim 1, characterized in that, The diameter of the first upper injection groove (21) is larger than that of the second upper injection groove (22). The first upper injection groove (21) and the first lower injection groove (31) have the same diameter. The second upper injection groove (22) and the second lower injection groove (32) have the same diameter.

7. The apparatus for preparing a double-layered balloon as described in claim 2, characterized in that, The feeding mechanism (7) is connected to the outer shell (1).

8. The apparatus for preparing a double-layered balloon as described in claim 7, characterized in that, The feeding mechanism (7) abuts against the cover plate (42). 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 feeding port (45).

9. The apparatus for preparing a double-layered balloon as described in claim 8, characterized in that, The inner wall of the feeding box (72) is provided with threads, and the rotating feed plate (73) is provided inside the feeding box (72). The rotating feed plate (73) has a rotating handle (74). When the rotating handle (74) is rotated, the feeding mechanism (7) feeds the material.

10. A method of using the apparatus for preparing a double-layered balloon as described in any one of claims 7 to 9, characterized in that, The usage method 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 vent 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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