RU2847054C2 - Method for preparing a closing end of an occluder and a device for preparing a closing end of an occluder - Google Patents

Abstract

FIELD: performed operations; medical science.

SUBSTANCE: application discloses a method for preparing a closing end of an occluder and a device for preparing the closing end of an occluder. Method of preparing a closing end of an occluder includes: step 100, at which performing a first pressing of the front end of the strip and simultaneously performing hot melting of the front end of the strip for pre-forming the front end of the strip; step 200, at which performing the preformed strip front end second pressing and simultaneously performing the strip preformed front end hot melting to form the preformed strip front end; and step 300, at which the formed front end of the strip is cooled to obtain a closing end. By means of the first pressing and hot melting, the strip is hardened and formed into the predetermined shape; and then, by means of a second pressing, the strip is better fitted to the mould and the bubbles are removed so that the formed closing end has a higher strength.

EFFECT: group of inventions provides a method and a device for preparing the closing end of the occluder, which can improve the strength of the closing end.

10 cl, 10 dwg, 1 tbl

Description

FIELD OF TECHNOLOGY TO WHICH THE INVENTION RELATES

This Application relates to the field of medical devices, in particular to a method for preparing the closing end of an occluder, and to a device for preparing the closing end of an occluder.

LEVEL OF TECHNOLOGY

With the continuous development of the medical device industry, the use of biodegradable materials is increasingly common. Many implant instruments have evolved to be more absorbent. Biodegradable materials are widely used in the production of biodegradable devices. Because the material is biodegradable, it can also be heat-treated and molded.

Currently, there is no equipment or method on the market for single-point apposition and forming specifically for strips of degradable material. This Application proposes a new device and method for single-point apposition and forming of the head end (specifically, the leading edge portion of the strip) of a medical strip made of degradable material. This device and method are suitable for producing woven medical devices from degradable material and offer the advantages of high equipment reliability, high-quality forming process, and high production efficiency.

ESSENCE OF THE INVENTION

The present Application is mainly directed to providing a method for preparing the closing end of an occluder and a device for preparing the closing end of an occluder, which can improve the strength of the closing end.

In a first aspect of the present Application, a method for preparing a closing end of an occluder is proposed, comprising the steps of:

performing a first pressing of the front end of the strip and simultaneously performing hot melting of the front end of the strip to pre-form the front end of the strip;

performing a second pressing of the preformed leading end of the strip, and simultaneously performing hot melting of the preformed leading end of the strip to form a preformed leading end of the strip; and

cool the formed front end of the strip to obtain a closing end;

wherein the pressure applied to the formed front end of the strip object during the second pressing is higher than the pressure applied to the formed front end of the strip during the first pressing.

If necessary, the strip is made from biodegradable material.

In a second aspect, the present disclosure provides a device for preparing the closing end of an occluder for implementing a method for preparing the closing end of an occluder. The device includes:

first form;

second form;

a fastening element configured to attach the front end of the strip;

a first drive device configured to drive a first mold and a second mold so that the first mold, the second mold and the fastening element coincide with each other to perform pressing of the front end of the strip, and so that the first mold abuts against the second mold, wherein the first mold and the second mold coincide with each other to form a first through hole for pressing, wherein the front end of the strip passes through the first through hole for pressing; and

heaters configured to heat the first mold and the second mold.

If necessary, the front end of the strip comprises a first part and a second part, wherein the first part is wound on a fastening element, and the second part is placed above the fastening element, wherein during the first pressing the first form and the second form coincide with each other for pressing the second part, during the second pressing the first form, the second form and the fastening element coincide with each other for pressing the first part, wherein the second part is located opposite the first part.

If necessary, during the second pressing, the first mold, the second mold and the fastening element coincide with each other to laterally press the first part, wherein both the first mold and the second mold move downwardly relative to the fastening element to drive the second part to press it downwardly against the upper end of the fastening element.

If necessary, the device additionally includes a second drive device configured to rotate the fastening element.

If necessary, each of the molds, the first mold and the second mold, is provided with a spiral groove so that the first mold and the second mold can move downward along the outer edge of the front end of the strip and relative to the front end of the strip.

If necessary, the fastening element is a cylindrical structure, and the fastening element is provided with a spiral groove for installing and securing the front end of the strip.

If necessary, the device additionally includes a ventilation needle located above the fastening element, wherein the second part is wound on the ventilation needle, and the cross-sectional area of the ventilation needle is less than the cross-sectional area of the fastening element.

If necessary, the ventilation needle is provided with a spiral groove for installing the front end of the strip.

In the above solution, first, through preliminary hot melting (i.e., the first pressing and hot melting of the material in the first pressing process), the leading end of the strip is pre-formed into a predetermined shape; and then, through the second pressing, the strip is better installed in the mold and the bubbles are removed, so that the formed trailing end has higher strength than the trailing end obtained by direct hot pressing.

BRIEF DESCRIPTION OF DRAWINGS

Fig. 1 is a block diagram of a method for forming the closing end of an occluder;

Fig. 2 is a schematic structural diagram of the occluder;

Fig. 3 is a schematic structural diagram of the closing end of Fig. 2;

Fig. 4 is a schematic structural diagram when the first mold, the second mold, the base plate, the fastening member and the ventilation needle are aligned with each other;

Fig. 5 is a schematic structural diagram of a device for preparing a closing end;

Fig. 6 is a schematic structural diagram when the first form is separated from the second form;

Fig. 7 is a schematic structural diagram when the first form is combined with the second form;

Fig. 8 is a schematic structural diagram of the fastening element and the ventilation needle;

Fig. 9 is a schematic structural diagram when the strip is installed on the fastening element and the ventilation needle; and

Fig. 10 is a schematic structural diagram of the strip.

List of reference positions: 1, first mold; 11, first heater through hole; 12, first cooling through hole; 13, first cooling channel; 2, second mold; 21, second heater through hole; 22, second cooling through hole; 23, second cooling channel; 3, first pressing through hole; 31, first pressing groove; 32, second pressing groove; 4, fastening element; 41, ventilation needle; 5, base plate; 6, closing end preparation device; 61, rotating base; 62, clamping device; 63, programmable logic controller; 64, pressure gauge; 65, clamp; 66, control panel; 7, occluder; 71, closing end; 8, strip; 81, strip front end; 811, first part; 822, second part; 9, heater; and A, border.

DETAILED DESCRIPTION

For the purpose of further description, the technical means used in the present Application to achieve the intended purpose and functions, specific embodiments, structures, features and functions according to the present Application are described in detail below, with reference to the accompanying drawings and preferred embodiments.

In the description of the invention, it should be understood that the orientation or position relationships indicated by such terms as "central," "transverse," "on," "under," "left," "right," "vertical," "horizontal," "upper," "lower," "inside," and "outside" are based on the orientation or position relationships shown in the accompanying drawings and are used only for easy and brief illustration and description, and are not used to indicate or designate that the mentioned devices or component should have a particular orientation or should be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

In the description of the invention, unless otherwise explicitly specified or defined, terms such as "install," "connect," and "connection" should be understood in a broad sense. For example, a connection may be a fixed connection, a detachable connection, or an integral connection; or a connection may be a mechanical connection or an electrical connection; or a connection may be a direct connection, an indirect connection through an intermediate element, or an internal connection between two components. The term "communication" should also be understood broadly, i.e., it may be direct or indirect through an intermediate element. A person of ordinary skill in the art can understand the specific meanings of the terms cited in the invention according to specific situations.

Furthermore, the technical features included in the various embodiments of this Application described below may be combined with each other as long as they do not contradict each other.

As used in this description and the appended claims, the singular forms "a," "an," and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more related listed elements.

The expression "plural", "numerous" in this disclosure and in the appended claims refers to two or more than two, unless otherwise indicated.

Fig. 1 shows a method for preparing the closing end of the occluder, including:

Step 100, in which the first pressing of the front end of the strip is performed and simultaneously hot melting of the front end of the strip is performed to pre-form the front end of the strip;

Step 200, which involves performing a second pressing of the preformed front end of the strip and simultaneously performing hot melting of the preformed front end of the strip to form the preformed front end of the strip; and

Step 300, in which the formed leading end of the strip is cooled to form a trailing end;

wherein the pressure applied to the formed front end of the strip object during the second pressing is higher than the pressure applied to the formed front end of the strip during the first pressing.

It should be understood that the occluder 7 is an interventional therapy implant, and the occluder 7 is precisely placed into a cardiac or endovascular defect or abnormal channel section to treat congenital heart defects such as atrial septal defect, ventricular septal defect, and patent ductus arteriosus. The closing end 71 refers to the end of the occluder 7 for connecting to the conveyor (also called the occluder 7 pusher) of the occluder 7. Additionally, in the prior art, most occluders 7 are not made of degradable materials, but are connected to the occluder 7 conveyors with metal screw connectors. However, the inventor(s) believe that the use of a degradable material for the preparation and production of the occluder 7 is favorable for the subsequent degradability and removal of the "degradable occluder 7" after the completion of its mission. Thus, a new method for preparing the closing end 71 of the occluder 7 is developed for preparing the closing end 71 of the occluder 7 made of a degradable material, wherein the degradable material includes, but is not limited to, polyglycolide, polylactide, polycaprolactone, polydioxanone, a copolymer of glycolide and lactide, and a mixture of polyglycolide and polycaprolactone. The strip 8 refers to a structure formed by a large number of monofilaments. In particular, the occluder 7 is obtained by processing the strip 8, and the closing end 71 of the occluder 7 is obtained by processing the front end 81 of the strip 8. The front end 81 of the strip is the end of the strip 8, as shown in Fig. 10. The strip is formed by winding a plurality of thread-like structures and, preferably, the thread-like structure is made of a degradable material.

In particular, according to the method, first, a first pressing of the front end 81 of the strip is performed, wherein the front end 81 of the strip is simultaneously subjected to hot melting for pre-forming the front end 81 of the strip. By means of hot pressing and pre-melting in the above step, the front end 81 of the strip is first pre-melted and pressed for a certain period of time, so that the shape of the front end 81 of the strip can be pre-set. Pre-forming the strip 8 refers to the initial formation of a partial structure, which is intended for forming on the front end 81 of the strip, into a specific shape. Then, a second pressing of the pre-formed front end 81 of the strip is performed, wherein the pre-formed front end 81 of the strip is simultaneously subjected to hot melting for forming the front end 81 of the strip. Forming the pre-formed front end 81 of the strip refers to forming the pre-formed front end 81 of the strip into a specific shape, which is a given shape of the closing end 71, in particular. Using the method described above, a structure in the shape of the closing end 71 of the occluder 7 can be obtained. To set the shape of the closing end 71, the formed strip 8 must be cooled. It should be understood that not the entire strip 8 is processed during forming; more specifically, hot forming must be performed on the leading end 81 of the strip. Pre-forming mainly refers to the processing of a portion of the leading end 81 of the strip.

If necessary, during the first pressing, the hot-melting temperature of the leading end of strip 81 is 5°C to 50°C higher than the melting point of strip 8, so that strip 8 can be hot-melted. Similarly, during the second pressing, the hot-melting temperature of the preformed leading end of strip 81 is 5°C to 50°C higher than the melting point of the strip. If necessary, strip 8 is made of a degradable material.

Additionally, the present disclosure provides a device 6 for preparing the closing end of an occluder, which is shown in Figs. 4 and 5, in particular. The device 6 for preparing the closing end is used to implement any of the above methods for preparing the closing end of an occluder, wherein the device 6 includes: a first mold 1, a second mold 2, a fastening element 4, a clamping device 62, and heaters 9.

Fastening element 4 is configured to secure the leading end of strip 81. Specifically, fastening element 4 is a cylindrical structure. Leading end 81 of strip 81 can be wound onto fastening element 4. It should be understood that the fastening element may be cylindrical, prismatic, or otherwise.

If necessary, the device 6 for preparing the closing end additionally includes a ventilation needle 41 located above the fastening element 4. The second part 812 is wound on the ventilation needle 41, and the cross-sectional area of the ventilation needle 41 is less than the cross-sectional area of the fastening element 4.

In particular, as shown in Fig. 8 and 9, the leading end 81 of the strip is wound on the ventilation needle 41 and the fastening element 4 to facilitate subsequent pressing. However, in some embodiments, the fastening element 4 is provided with a spiral groove for mounting and securing the leading end 81 of the strip, and the ventilation needle 41 is also provided with a spiral groove for mounting the leading end 81 of the strip. Thus, it is advisable to position the leading end 81 of the strip on the ventilation needle 41 and the fastening element 4 in a predetermined manner. Additionally, it should be understood that in other embodiments, each fastening element 4 and the ventilation needle 41 may also not be provided with a spiral groove.

The clamping device 62 is configured to drive the first mold 1 and the second mold 2 so that the first mold 1, the second mold 2 and the fastening element 4 coincide with each other for pressing (pressing includes the first pressing and the second pressing) of the front end 81 of the strip. And the first mold 1 rests against the second mold 2, wherein the first mold 1 and the second mold 2 adjoin each other to form the first through hole for pressing 3. The front end 81 of the strip passes through the first through hole for pressing 3. In particular, the clamping device 62 includes two clamping levers and a motor. The two clamping levers are respectively configured to clamp the first mold 1 and the second mold 2. The motor is configured to drive the clamping levers to drive the first mold 1 to separate from the second mold 2 or to drive the first mold 1 and the second mold 2 to close. In this document, the closing of the mold refers to the fact that the first mold 1 abuts against the second mold 2, wherein the first mold 1 and the second mold 2 are adjacent to each other to form the first through-hole for pressing 3. Meanwhile, it should be understood that, although the front end 81 of the strip passes through the first through-hole for pressing 3, the side surfaces of the front end 81 of the strip may still contact the first through-hole for pressing 3. More specifically, the first mold 1 and the second mold 2 can still press the front end 81 of the strip from the side of the surfaces to form the front end 81 of the strip. In addition to the clamping device 62, the first driving device may have other structures, such as a clamping jaw device or a mechanical lever, which can perform up-down movement and opening-closing.

It should be understood that, as shown in Fig. 6, the first mold 1 is provided with a groove for the first pressing 31, and the second mold 2 is provided with a groove for the second pressing 32. When the first mold 1 and the second mold 2 are closed, as shown in Fig. 7, the groove for the first pressing 31 and the groove for the second pressing 32 adjoin each other to form a first through hole for pressing 3.

The heaters 9 for heating the first mold 1 and the second mold 2 may be conventional heaters 9 on the market, which are not limited in the present disclosure. In addition, in some implementations, the first mold 1 is provided with a through hole of the first heater 11, the second mold 2 is provided with a through hole of the second heater 21, wherein each heater 9 can be placed in the through hole of the first heater 11 and the through hole of the second heater 21 for heating the first mold 1 and the second mold 2 to achieve hot melting for the leading end 81 of the strip. Of course, for other implementations, the heaters 9 can be located on the peripheries of the first mold 1 and the second mold 2, and are not necessarily located in the through hole of the first heater 11 and the through hole of the second heater 21. Additionally, the first mold 1 is provided with a first cooling through hole 12, wherein the first cooling through hole 12 can communicate with the cooling reservoir via the first cooling channel 13, wherein the coolant is transferred to the first cooling through hole 12 by the cooling reservoir for cooling the first mold 1 to cool the formed front end 81 of the strip, which abuts against the first mold 1. Similarly, the second mold 2 can be provided with a second cooling through hole 22, wherein the second cooling through hole 22 can communicate with the cooling reservoir via the second cooling channel 23, so that the coolant can be transferred to the second cooling through hole 22 by the cooling reservoir for cooling of the second form 2.

In particular, as shown in Fig. 9, the front end 81 of the strip includes a first portion 811 and a second portion 812, wherein the portion above the boundary A is the first portion 811, and the portion below the boundary A is the second portion 812. It should be understood that the second portion 812 is located at the very front end of the strip 8, wherein the second portion 812 is connected to another portion of the strip 8 by the first portion 811. The first portion 811 is wound onto the fastening element 4, and the second portion 812 is placed above the fastening element 4. During the first pressing, the first mold 1 and the second mold 2 press the second portion 812, and during the second pressing, the first mold 1, the second mold 2 and the fastening element 4 are adjacent to each other to press the first portion 811. If necessary, during the second pressing, the first mold 1, the second mold 2 and the fastening element 4 are adjacent to each other to press the first portion 811 from the side surfaces, wherein the first form 1 and the second form 2 move downwards relative to the fastening element 4 to drive the second part 812 to be pressed downwards against the upper end of the fastening element 4.

In addition, in some implementations, the device 6 for preparing the closing end further includes a second drive device for driving the fastening element 4 into rotation. In particular, the device 6 for preparing the closing end is provided with a rotating base 61, and the fastening element 4 is fixed on the base plate 5. Therefore, when the second drive device drives the rotating base 61 into rotation in order to drive the base plate 5 on the rotating base 61, the fastening element 4 on the base plate 5 also rotates accordingly. The second drive device may be a rotating cylinder or a motor, etc. In some implementations, the device 6 for preparing the closing end may not be provided with a rotating base 61, and the base plate 5 and the second drive device are connected by a fastening element 4 for driving the fastening element 4 into rotation.

If necessary, each of the molds, the first mold 1 and the second mold 2, is provided with a spiral groove, so that the first mold 1 and the second mold 2 can spirally move downwards along the outer edge of the front end 81 of the strip and relative to the front end 81 of the strip. The device 6 further includes a ventilation needle 41, which is attached to the fastening element 4. The ventilation needle 41 is located above the fastening element 4, and the second part 812 is wound on the ventilation needle 41. It should be understood that each of the molds, the first mold 1 and the second mold 2, is provided with a spiral groove, so that the first mold 1 and the second mold 2 can spirally move downwards along the outer edge of the front end 81 of the strip and relative to the front end 81 of the strip; and on the outer edge of the front end of the strip 81, an initial spiral groove can be left to facilitate the subsequent connection of the closing end 71 and the occluder conveyor 7.

In particular, first, the strip 8 is wound on the ventilation needle 41 and the fastening element 4, wherein the upper end of the strip 8 is approximately 10 mm higher than the fastening element 4, and at the same time, the lower ends of the first form 1 and the second form 2 are positioned at the same level with the upper end of the strip 8. Next, the first form 1 and the second form 2 are closed. Then, the heaters 9 heat the first form 1 and the second form 2, and the rotating base 61 is set in rotation to set the fastening element 4 in rotation, and at the same time, the first form 1 and the second form 2 are set in motion to move downwards by the clamping device 62 to begin the first pressing. At this time, since each of the molds, the first mold 1 and the second mold 2, is provided with a spiral groove, the first mold 1 and the second mold 2 can spirally move downward along the outer edge of the front end 81 of the strip and relative to the front end 81 of the strip until the lower ends of the first mold 1 and the second mold 2 are located at the same level with the upper end of the fastening element 4 to complete the first pressing. Then, the first mold 1 and the second mold 2 continue to move downward to begin the second pressing. At this moment, the first mold 1, the second mold 2 and the fastening element 4 are adjacent to each other to press the first part 811 from the side surfaces. In particular, one half side of the first part 811 is located between the first mold 1 and the fastening element 4, clamped and pressed by the first mold 1 and the fastening element 4, and the other half side of the first part 811 is located between the second mold 2 and the fastening element 4, clamped and pressed by the second mold 2 and the fastening element 4. At the same time, the first mold 1 and the second mold 2 move downwards relative to the fastening element 4 to drive the second part 812 to press downwards against the upper end of the fastening element 4. In particular, since the first mold 1 and the second mold 2 have a certain width, when the lower half parts of the first mold 1 and the second mold 2 press the first part 811, the upper half parts of the first mold 1 and the second mold 2 can still rest against the second part 812. And the first mold 1 and the second mold 2, which move downwards, can also apply a downward force to the second part 812, so that the second part 812 rests against the fastening element 4, and the second part 812 can be better formed. It should be understood that during the second pressing, the first mold 1 and the second mold 2 move downwards together until the lower ends of the first mold 1 and the second mold 2 are located at the same level with the first part 811. After completing the second pressing, the formed front end 81 (i.e., the formed first part 811 and the formed second part 812) of the strip is obtained. Then, the formed front end 81 of the strip must be cooled to obtain the closing end 71. If necessary, the first mold 1 and the second mold 2 are cooled to room temperature.

It should be understood that the ventilation needle 41 is mainly used to form ventilation holes in the closing end 71. However, in some implementations, since the closing end 71 does not need ventilation holes, there is no need to provide the fastening element 4 with the ventilation needle 41. At this time, the second part 812 of the strip 8 is wound together in a circular motion and placed on the fastening element 4.

It should be understood that the device 6 for preparing the closing end further includes a programmable logic controller 63, and the user can control the heating of the heaters 9, the rotation of the rotating base 61 and the movement of the clamping device 62 with keys in the programmable logic controller 63. In addition, the rotating base and the clamping levers of the clamping device can be located on the control panel 66 of the device 6 for preparing the closing end, and the second drive device and the motor of the clamping device can be located inside the control panel 66.

Meanwhile, the device 6 for preparing the closing end further includes a pressure gauge 64 and clamps 65. Specifically, when the clamping device drives the clamping arms with a cylinder, the cylinder pressure can be monitored via the pressure gauge 64 to indirectly understand the output force of the clamping arms. The clamps 65 are connected to a power source and a control system (such as a central processing unit or programmable logic controller 63), with one end of the wire connected to the clamps 65 and the other end of the wire connected to the heaters and the clamping device to provide power to the heaters and the clamping device and control the heaters and the clamping device. Therefore, when the user replaces the heaters or the clamping device according to the circumstances, the heaters and the clamping device can be more quickly connected to the power source and the control system of the clamps 65.

To test the actual effect, the applicant performs the following experiments:

The leading end of the 81 strip is processed separately using a direct hot pressing method and a hot pressing method after pre-melting.

Process Sample number Tensile strength N1 of the closing end 71 and other parts of the occluder 7 Strength at deformation N2 of the closing end 71 Direct hot pressing 1 73N 113N 2 82N 98N 3 85N 96N Hot pressing after pre-melting 4 122N 182N 5 134N 201N 6 128N 179N

The tensile strength N1 of the closing end 71 and other parts of the occluder 7 refers to: the tension force applied along the axial direction (i.e., the forward-backward direction) of the occluder 7 to cause the rupture of the closing end 71.

The deformation strength N2 of the closing end 71 refers to: the acting force applied to press the closing end 71 along the radial direction of the closing end 71 to cause the deformation of the closing end 71 by 10%.

It is easy to see that the closing end prepared and obtained using the hot pressing method after pre-melting has higher strength.

It should be understood that the method of hot pressing after preliminary melting includes:

Step 100, in which the first pressing of the front end of the strip is performed and simultaneously hot melting of the front end of the strip is performed to pre-form the front end of the strip;

Step 200, which involves performing a second pressing of the preformed front end of the strip and simultaneously performing hot melting of the preformed front end of the strip to form the preformed front end of the strip; and

Step 300 involves cooling the formed leading edge of the strip to form a trailing end, wherein the pressure applied to the formed leading edge of the strip-shaped object during the second pressing is higher than the pressure applied to the preformed leading edge of the strip during the first pressing. The specific implementation of the method is similar to the above solution.

The direct hot pressing method is approximately similar to the one described above, and the main difference is that the pressure applied to the formed front end 81 of the strip during the second pressing is equal to the pressure applied to the pre-formed front end 81 of the strip during the first pressing. In particular, the front end 81 of the strip is completely wound on the same cylindrical structure, and during pressing, the first mold 1 and the second mold 2 move up and down instead of horizontally, in order to ensure that the pressure applied to the formed front end 81 of the strip during the second pressing is equal to the pressure applied to the pre-formed front end 81 of the strip during the first pressing. Of course, in some implementations, the force measuring device may also be configured to measure the effective force applied by the first mold 1 and the second mold 2 to the front end 81 of the strip, wherein the output force of the clamping device 62 is adjusted based on the effective force, and finally, the pressure applied to the front end 81 of the strip during the first pressing is equal to the pressure applied to the formed front end 81 of the strip during the second pressing.

The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any minor modifications and substitutions made by a person skilled in the art based on this Application shall fall within the scope of protection claimed by this Application.

Claims (19)

1. A method for preparing the closing end of an occluder, characterized in that the method comprises the steps in which performing a first pressing of the front end of the strip and simultaneously performing hot melting of the front end of the strip to pre-form the front end of the strip; performing a second pressing of the preformed leading end of the strip and simultaneously hot melting the preformed leading end of the strip to form a preformed leading end of the strip; and cool the formed front end of the strip to obtain a closing end; wherein the pressure applied to the formed front end of the strip object during the second pressing is higher than the pressure applied to the pre-formed front end of the strip during the first pressing. 2. A method for preparing the closing end of an occluder according to paragraph 1, characterized in that the strip is made from a degradable material. 3. A device for preparing the closing end of an occluder for implementing the method for preparing the closing end of an occluder according to claim 1 or 2, comprising first form; second form; a fastening element configured to attach the front end of the strip; a first drive device configured to drive a first mold and a second mold so that the first mold, the second mold and the fastening element abut one another to perform pressing of the front end of the strip, and so that the first mold abuts the second mold, wherein the first mold and the second mold abut one another to form a first through hole for pressing, wherein the front end of the strip passes through the first through hole for pressing; and heaters configured to heat the first mold and the second mold. 4. A device for preparing the closing end of an occluder according to claim 3, characterized in that the front end of the strip comprises a first part and a second part, wherein the first part is wound onto a fastening element, and the second part is placed above the fastening element, wherein during the first pressing the first mold and the second mold are adjacent to each other for pressing the second part, during the second pressing the first mold, the second mold and the fastening element are adjacent to each other for pressing the first part, wherein the second part is located opposite the first part. 5. A device for preparing the closing end of an occluder according to claim 3, characterized in that during the second pressing, the first mold, the second mold and the fastening element are adjacent to each other for lateral pressing of the first part, wherein the first mold and the second mold move downwardly relative to the fastening element to set in motion the second part for compression downwardly toward the upper end of the fastening element. 6. A device for preparing the closing end of an occluder according to one of paragraphs 3-5, characterized in that the device additionally contains a second drive device configured to cause the fastening element to rotate. 7. A device for preparing the closing end of an occluder according to one of paragraphs 3-6, characterized in that each of the molds, the first mold and the second mold, is provided with a spiral groove so that the first mold and the second mold can move downwards along the outer edge of the front end of the strip and relative to the front end of the strip. 8. A device for preparing the closing end of an occluder according to one of paragraphs 3-7, characterized in that the fastening element is a cylindrical structure, and the fastening element is provided with a spiral groove for installing and securing the front end of the strip. 9. A device for preparing the closing end of an occluder according to one of paragraphs 3-8, characterized in that the device additionally contains a ventilation needle located above the fastening element, and the second part is wound on the ventilation needle, wherein the cross-sectional area of the ventilation needle is less than the cross-sectional area of the fastening element. 10. A device for preparing the closing end of the occluder according to paragraph 9, characterized in that the ventilation needle is provided with a spiral groove for installing the front end of the strip.