CN112494173B - Vascular stent structure processing device and method - Google Patents

Abstract

The invention discloses a vascular stent structure processing device and a method, which comprises a pretreatment component for feeding and processing materials into a molten state, wherein the pretreatment component is connected with an extrusion forming component for respectively forming a first layer stent main body and a second layer stent main body, and the extrusion forming component is connected with a nailing component for fixedly connecting the first layer stent main body and the second layer stent main body; the extrusion part is including all connecting first shaping pipeline and the second shaping pipeline at preliminary treatment part discharge gate, all installs the changeable inflation pipe fitting of internal diameter through the support is unsettled in the inner chamber of first shaping pipeline and second shaping pipeline, installs the piece of ordering about that is used for driving the inflation pipe fitting to expand or contract in the inflation pipe fitting. The invention seals the rupture parts of the two parts, thereby the blood vessel support can automatically solve the damage to a certain degree.

Description

Vascular stent structure processing device and method

Technical Field

The invention relates to the technical field of medical instruments, in particular to a device and a method for processing a vascular stent structure.

Background

The vascular stent is an important means for treating vascular stenosis diseases and is widely applied clinically. However, most of the existing vascular stents are of a single-layer net structure, and after the vascular stents are implanted into a human body, the stents of the structure are easily broken or collapsed by balloon expansion or impact of blood flow; thereby losing the supporting effect before the angioplasty and even risking death, and the safety performance needs to be further improved.

In prior art, like a utility model patent of application number CN201920174822.X, it mainly solves above-mentioned problem through the vascular support that possesses double-deck pipe wall, and the device is difficult to appear the damage at the same position when the expansion in ectonexine to effectively ensured the integrality of vascular support when the expansion, promoted vascular support's security performance. However, if the two layers are broken at the same position or at similar positions, the vascular stent still suffers from exudation, thereby causing a certain risk to the patient. The scheme cannot solve the problem of breakage of the blood vessel stent from the essence. Therefore, a vascular stent which can compensate for the fragmentation to a certain extent is needed.

Disclosure of Invention

The invention aims to provide a vascular stent structure processing device and a method, which aim to solve the technical problem that a vascular stent in the prior art cannot be compensated to a certain extent after being damaged.

In order to solve the technical problems, the invention specifically provides the following technical scheme:

a blood vessel stent structure processing device comprises a pretreatment component which is used for feeding and processing materials into a molten state, wherein the pretreatment component is connected with an extrusion forming component which is used for respectively forming a first layer stent main body and a second layer stent main body, and the extrusion forming component is connected with a nailing component which is used for fixedly connecting the first layer stent main body and the second layer stent main body;

Extrusion part is including all connecting first shaping pipeline and the second shaping pipeline of preliminary treatment part discharge gate the inner chamber of first shaping pipeline and second shaping pipeline all installs the changeable inflation pipe fitting of internal diameter through the support is unsettled install in the inflation pipe fitting and be used for the drive the inflation pipe fitting carries out the piece of ordering about that expands or contract.

In a preferred embodiment of the present invention, a plurality of projections a for forming grooves in the inner wall of the stent body in the first layer are attached to the surface of the expanded tubular member in the first forming tube in an array, and a plurality of projections B for forming grooves in the surface of the stent body in the second layer are attached to the inner wall of the second forming tube in an array.

As a preferred scheme of the invention, both sides of the reserved convex body a are provided with a reserved hole channel a and a reserved hole channel B for pre-filling materials to form a connecting bump;

and both sides of the reserved convex body B are provided with a reserved hole channel C and a reserved hole channel D which are used for filling materials in advance to form a connecting convex block.

As a preferable scheme of the present invention, the expansion pipe includes a tray fixedly connected to the bracket, the tray is radially provided with a plurality of excess chutes, sliding joints are slidably installed in the excess chutes, rigid sector plates are fixedly connected to the sliding joints, and two adjacent rigid sector plates are connected by a flexible sector plate to form an annular structure.

As a preferable scheme of the invention, a splicing extrusion ring is nested in the annular structure, and a rotating disk is nested in the splicing extrusion ring;

the concatenation extrusion ring is formed by flexible portion and the concatenation in turn of rigidity portion, the deformation groove has been seted up in the flexible portion, flexible portion and rigidity portion all with the edge laminating of rotating disc, just the integration is formed with on the rotating disc with the deformation tooth that the deformation groove carried out the interlock the fretwork groove has been seted up in the rigidity portion the deformation tooth with be provided with between the deformation groove and be used for rotating disc and make it takes place to misplace to warp tooth and deformation groove fixed the joint structure in deformation tooth and deformation groove.

As a preferable aspect of the present invention, the middle points of the rigid sector plate and the flexible sector plate are both abutted against the flexible portion.

As a preferred scheme of the present invention, the nailing component includes a detaching slot which is opened on both the first forming pipeline and the second forming pipeline and is fixed by a bolt, and a punching structure for extruding and bonding the two connecting protrusions is installed on the first forming pipeline in a radial sliding manner at positions corresponding to the reserved hole channel a and the reserved hole channel B.

As a preferable scheme of the present invention, a fixed point chute is formed on the surface of the first molding pipeline, a slide block is slidably and adjustably installed in the fixed point chute in a clamping manner, one end of a special-shaped connecting rod is installed on the installation slide block, and the other end of the special-shaped connecting rod is detachably connected to one of the brackets.

In order to solve the technical problems, the invention further provides the following technical scheme:

a method for processing a vascular stent structure comprises the following steps:

s100, respectively and independently processing two raw materials with different elasticity by using a pretreatment component, and respectively sending the two raw materials into a first forming pipeline and a second forming pipeline;

s200, respectively manufacturing a first layer of bracket main body and a second layer of bracket main body through a first forming pipeline and a second forming pipeline, forming a reserved groove A on the first layer of bracket main body, forming a reserved groove B on the second layer of bracket main body, forming a connecting bump A and a connecting bump B in the reserved groove A, and forming a connecting bump C and a connecting bump D in the reserved groove B;

s300, when the first-layer bracket main body and the second-layer bracket main body are solidified and the connecting convex blocks A, the connecting convex blocks B, the connecting convex blocks C and the connecting convex blocks D are not solidified, the basically-formed second-layer bracket main body is nested in the first-layer bracket main body;

S400, moving the second-layer support main body to enable the connecting lug B to be aligned with the connecting lug C, enabling the connecting lug B and the connecting lug C to be compressed and fused by using a stamping structure and to be cooled and solidified, moving the second-layer support main body to enable the connecting lug A to be aligned with the connecting lug D, enabling the connecting lug A and the connecting lug D to be compressed and fused by using the stamping structure and to be cooled and solidified, and forming an X-shaped connecting structure between the second-layer support main body and the first-layer support main body;

s500, finally, an expansion balloon is arranged in the second layer of stent main body to form the finished product of the intravascular stent.

Compared with the prior art, the invention has the following beneficial effects:

form X shape connection structure between the two-layer pipe wall that uses this device to make, because connect through X shape connection structure between the two-layer pipe wall, the material of two-layer pipe wall can be different, make the elasticity of two-layer pipe wall different, and draw under pulling through X shape connection structure's reversal, reach a balance, after two-layer pipe wall all breaks, because the shrinkage degree of two-layer pipe wall is different, and the original balance of X shape connection structure has been destroyed, thereby make the fracture mouth on two-layer pipe wall take place to shift, thereby carry out mutual shutoff to fracture department between them, thereby make intravascular stent can solve the damage of certain degree by oneself.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is a cross-sectional view of an overall structure in an embodiment of the invention;

FIG. 2 is a cross-sectional view of an expanded tubular member in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a spliced extrusion ring and a rotating disk in an embodiment of the invention;

FIG. 4 is a cross-sectional view of a first molded tube in an embodiment of the invention.

The reference numerals in the drawings denote the following, respectively:

1-a pre-processing unit; 2-extrusion forming of the component; 3-a stapling component;

21-a first shaped pipe; 22-a second profiled conduit; 23-a scaffold; 24-expanding the tubular element; 25-an actuating member; 26-reserving a convex body A; 27-reserved convex body B; 28-reserving a pore channel A; 29-reserving a hole channel B; 210-reserving a hole channel C; 211-reserve hole channel D;

31-disassembling the slot; 32-a stamped configuration; 33-fixed point chute; 34-mounting a sliding block; 35-a shaped link;

241-a tray; 242-excess chute; 243-sliding connection body; 244-rigid sector plates; 245-a flexible sector plate; 246-splicing of the extrusion rings; 247-rotating a disk;

2461-a flexible portion; 2462-a rigid portion; 2463-deforming groove; 2464-deformed teeth; 2465-hollowed out grooves; 2466-snap fit arrangement.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, 2 and 3, the present invention provides a vascular stent structure processing device, comprising a pretreatment unit 1 for feeding and processing materials into a molten state, the pretreatment unit 1 being connected with an extrusion molding unit 2 for forming stent bodies of a first layer and a second layer, respectively, the extrusion molding unit 2 being connected with a stapling unit 3 for fixedly connecting the stent bodies of the first layer and the second layer; the extrusion forming component 2 comprises a first forming pipeline 21 and a second forming pipeline 22 which are connected to a discharge port of the pretreatment component 1, inner cavities of the first forming pipeline 21 and the second forming pipeline 22 are respectively provided with an expansion pipe fitting 24 with changeable inner diameter in a suspension mode through a support 23, and an actuating piece 25 used for driving the expansion pipe fitting 24 to expand or contract is arranged in the expansion pipe fitting 24.

Wherein a plurality of reserved convex bodies A26 for forming grooves on the inner wall of the stent main body of the first layer are arranged on the surface of the expansion pipe 24 in the first forming pipeline 21 in an array manner, and a plurality of reserved convex bodies B27 for forming grooves on the surface of the stent main body of the second layer are arranged on the inner wall of the second forming pipeline 22 in an array manner. Both sides of the reserved convex body A26 are provided with a reserved hole channel A28 and a reserved hole channel B29 which are used for filling materials in advance to form a connecting bump; and both sides of the reserved convex body B27 are provided with a reserved hole channel C210 and a reserved hole channel D211 which are used for filling materials in advance to form a connecting bump. The expansion pipe fitting 24 comprises a tray 241 fixedly connected with the support 23, the tray 241 is radially provided with a plurality of excess sliding grooves 242, sliding joints 243 are slidably mounted in the excess sliding grooves 242, rigid fan-shaped plates 244 are fixedly connected to the sliding joints 243, and two adjacent rigid fan-shaped plates 244 are connected through flexible fan-shaped plates 245 to form an annular structure.

In the prior art, as the application number: cn201920174822.x, with patent name: the utility model provides a patent of helical structure's vascular stent, it is mainly through spiral book formation vascular stent, and the spiral book structure can form two-layer pipe wall at the parcel in-process, and this double-layer pipe wall can be when the individual layer pipe wall breaks, and another layer pipe wall can carry out the shutoff to it, but if two-layer homonymy position or similar position take place the breakage, this vascular stent still can take place to ooze the phenomenon to cause certain risk for the patient.

Above-mentioned scheme can't be followed the breakage of blood vessel support in essence and carried out the shutoff, and this device aims at providing one kind and can carry out the process of making up by oneself of certain degree to the breakage.

The present invention forms a mold of a material in a molten state using a first molding pipe 21 and a second molding pipe 22, and forms the material into a tubular shape by fitting two expansion pipes 24 together, and performs extrusion molding of the material.

The expansion pipe 24 is mainly realized by splicing a rigid sector plate 244 and a flexible sector plate 245, wherein the rigid sector plate 244 has an expanded radian, and the flexible sector plate 245 can stretch and contract, so that an expansion and contraction function is realized.

Wherein a splice extrusion ring 246 is nested within the annular structure, and a rotating disk 247 is nested within the splice extrusion ring 246; the splicing extrusion ring 246 is formed by alternately splicing a flexible part 2461 and a rigid part 2462, wherein a deformation groove 2463 is formed on the flexible part 2461, the flexible part 2461 and the rigid part 2462 are both attached to the edge of the rotating disc 247, deformation teeth 2464 engaged with the deformation groove 2463 are integrally formed on the rotating disc 247, a hollow groove 2465 is formed on the rigid part 2462, and a clamping structure 2466 for fixing the deformation teeth 2464 and the deformation groove 2463 when the deformation teeth 2464 and the deformation groove 2463 are dislocated is arranged between the deformation teeth 2464 and the deformation groove 2463. The midpoints of the rigid sector plate 244 and the flexible sector plate 245 both interfere with the flexible portion 2461.

As shown in fig. 1 and 4, the nailing component 3 includes a detaching slot 31 opened on each of the first forming pipe 21 and the second forming pipe 22 and fixed by bolts, and a punching structure 32 for extruding and bonding two connecting protrusions is radially slidably mounted on each of the first forming pipe 21 corresponding to the reserved passage a28 and the reserved passage B29.

Wherein a fixed point sliding groove 33 is formed on the surface of the first forming pipeline 21, a sliding block 34 is slidably adjusted and installed in the fixed point sliding groove 33 in a clamping manner, one end of a special-shaped connecting rod 35 is installed on the installing sliding block 34, and the other end of the special-shaped connecting rod 35 is detachably connected to one of the brackets 23.

The actuating element 25 works according to the following principle: the deformation teeth 2464 on the rotating disc 247 are just nested in the deformation grooves 2463 on the splicing pressing ring 246, when the rotating disc 247 is driven to rotate by a person, the deformation teeth 2464 are driven to rotate, so that the deformation teeth 2464 press the deformation grooves 2463, and the flexible portion 2461 is deformed due to the pressing of the deformation teeth 2464 and the deformation grooves 2463, so that the flexible portion 2461 is pressed to the outer side, and the expansion pipe 24 is expanded.

The invention also provides a processing method of the vascular stent structure, which comprises the following steps:

S100, respectively and independently processing two raw materials with different elasticity by using a preprocessing component, and respectively feeding the two raw materials into a first forming pipeline and a second forming pipeline;

s200, respectively manufacturing a first layer of support main body and a second layer of support main body through a first forming pipeline and a second forming pipeline, forming a reserved groove A on the first layer of support main body, forming a reserved groove B on the second layer of support main body, forming a connecting bump A and a connecting bump B in the reserved groove A, and forming a connecting bump C and a connecting bump D in the reserved groove B;

s300, when the first layer bracket main body and the second layer bracket main body are solidified and the connecting lug A, the connecting lug B, the connecting lug C and the connecting lug D are not solidified, the basically molded second layer bracket main body is nested in the first layer bracket main body;

s400, moving the second-layer support main body to enable the connecting lug B to be aligned to the connecting lug C, enabling the connecting lug B and the connecting lug C to be compressed, fused and cooled and solidified by using a stamping structure, moving the second-layer support main body to enable the connecting lug A to be aligned to the connecting lug D, enabling the connecting lug A and the connecting lug D to be compressed, fused and cooled and solidified by using the stamping structure, and forming an X-shaped connecting structure between the second-layer support main body and the first-layer support main body;

S500, finally, an expansion balloon is arranged in the second layer of stent main body to form a finished product of the intravascular stent.

Form X shape connection structure between the two-layer pipe wall that uses this device to make, because connect through X shape connection structure between the two-layer pipe wall, the material of two-layer pipe wall can be different, make the elasticity of two-layer pipe wall different, and draw through X shape connection structure's the reverse, reach a kind of balance, after two-layer pipe wall all breaks, because the shrink degree of two-layer pipe wall is different, and the original balance of X shape connection structure has been destroyed, thereby make the fracture mouth on the two-layer pipe wall take place to shift, thereby carry out mutual shutoff to fracture department between them.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made to the disclosure by those skilled in the art within the spirit and scope of the disclosure, and such modifications and equivalents should also be considered as falling within the scope of the disclosure.

Claims (6)

1. A vascular stent structure processing device comprising a pretreatment unit (1) for feeding and processing materials into a molten state, characterized in that: the pretreatment part (1) is connected with an extrusion forming part (2) for respectively forming a first layer of bracket main body and a second layer of bracket main body, and the extrusion forming part (2) is connected with a nailing part (3) for fixedly connecting the first layer of bracket main body and the second layer of bracket main body;

The extrusion forming component (2) comprises a first forming pipeline (21) and a second forming pipeline (22) which are connected to a discharge port of the pretreatment component (1), inner cavities of the first forming pipeline (21) and the second forming pipeline (22) are respectively provided with an expansion pipe fitting (24) with changeable inner diameter in a hanging mode through a support (23), and an actuating piece (25) for driving the expansion pipe fitting (24) to expand or contract is arranged in the expansion pipe fitting (24);

a plurality of reserved convex bodies A (26) for forming grooves on the inner wall of the bracket main body of the first layer are arranged on the surface of the expansion pipe fitting (24) in the first forming pipeline (21) in an array manner, and a plurality of reserved convex bodies B (27) for forming grooves on the surface of the bracket main body of the second layer are arranged on the inner wall of the second forming pipeline (22) in an array manner;

both sides of the reserved convex body A (26) are provided with a reserved hole channel A (28) and a reserved hole channel B (29) which are used for filling materials in advance to form a connecting convex block;

both sides of the reserved convex body B (27) are provided with a reserved hole channel C (210) and a reserved hole channel D (211) which are used for filling materials in advance to form a connecting bump;

the expansion pipe fitting (24) comprises a tray (241) fixedly connected with the support (23), a plurality of excess sliding grooves (242) are formed in the radial direction of the tray (241), a sliding connection body (243) is slidably mounted in the excess sliding grooves (242), rigid fan-shaped plates (244) are fixedly connected to the sliding connection body (243), and two adjacent rigid fan-shaped plates (244) are connected through flexible fan-shaped plates (245) to form an annular structure.

2. The vascular stent structure processing device as set forth in claim 1, wherein: a spliced extrusion ring (246) nested within the annular structure, a rotating disk (247) nested within the spliced extrusion ring (246);

the splicing extrusion ring (246) is formed by alternately splicing a flexible part (2461) and a rigid part (2462), a deformation groove (2463) is formed in the flexible part (2461), the flexible part (2461) and the rigid part (2462) are attached to the edge of the rotating disk (247), a deformation tooth (2464) meshed with the deformation groove (2463) is integrally formed on the rotating disk (247), a hollow groove (2465) is formed in the rigid part (2462), and a clamping structure (2466) used for fixing the deformation tooth (2464) and the deformation groove (2463) when the deformation tooth (2464) and the deformation groove (2463) are dislocated due to the rotating disk (247) is arranged between the deformation tooth (2464) and the deformation groove (2463).

3. A vascular stent structure fabrication device as claimed in claim 2, wherein: the midpoints of the rigid sector plate (244) and the flexible sector plate (245) are in interference with the flexible portion (2461).

4. A vascular stent structure fabrication device as claimed in claim 3, wherein: the nailing component (3) comprises a first forming pipeline (21) and a second forming pipeline (22), dismounting grooves (31) are formed in the first forming pipeline (21) and the second forming pipeline (22) and fixed through bolts, and stamping structures (32) used for extruding and bonding two connecting convex blocks are arranged on the first forming pipeline (21) in a radial sliding mode and correspond to the reserved hole channels A (28) and the reserved hole channels B (29).

5. The vascular stent structure processing device as set forth in claim 4, wherein: the fixed-point sliding groove (33) is formed in the surface of the first forming pipeline (21), a sliding block (34) is installed in the fixed-point sliding groove (33) in a sliding adjusting and clamping mode, one end of a special-shaped connecting rod (35) is installed on the installing sliding block (34), and the other end of the special-shaped connecting rod (35) is detachably connected to one of the supports (23).

6. A method for processing a vascular stent structure, which is applied to the vascular stent structure processing device according to any one of claims 1 to 5, and is characterized in that: the method comprises the following steps:

s100, respectively and independently processing two raw materials with different elasticity by using a pretreatment component, and respectively sending the two raw materials into a first forming pipeline and a second forming pipeline;

s200, respectively manufacturing a first layer of bracket main body and a second layer of bracket main body through a first forming pipeline and a second forming pipeline, forming a reserved groove A on the first layer of bracket main body, forming a reserved groove B on the second layer of bracket main body, forming a connecting bump A and a connecting bump B in the reserved groove A, and forming a connecting bump C and a connecting bump D in the reserved groove B;

S300, when the first-layer bracket main body and the second-layer bracket main body are solidified and the connecting convex blocks A, the connecting convex blocks B, the connecting convex blocks C and the connecting convex blocks D are not solidified, the basically-formed second-layer bracket main body is nested in the first-layer bracket main body;

s400, moving the second-layer support main body to enable the connecting lug B to be aligned with the connecting lug C, enabling the connecting lug B and the connecting lug C to be compressed and fused by using a stamping structure and to be cooled and solidified, moving the second-layer support main body to enable the connecting lug A to be aligned with the connecting lug D, enabling the connecting lug A and the connecting lug D to be compressed and fused by using the stamping structure and to be cooled and solidified, and forming an X-shaped connecting structure between the second-layer support main body and the first-layer support main body;

s500, finally, an expansion balloon is arranged in the second layer of stent main body to form the finished product of the intravascular stent.

Images