Bending-adjustable PTFE (Polytetrafluoroethylene) pipe production mold

Abstract

The utility model discloses a bending-adjustable PTFE (Polytetrafluoroethylene) pipe production mold which comprises a core mold shell for supporting and a butt-joint threaded cylinder, and the butt-joint threaded cylinder is fixedly arranged in the center of the upper end face of the core mold shell; the feeding groove is formed in the position, close to the upper portion, of the side end face of the core mold shell. According to the utility model, the feeding gap is integrally processed on the core rod, the difference between a main core needle and an auxiliary core needle is avoided, and the feeding gap is fixed, so that the eccentricity problem of equipment does not need to be considered, the influence factors of products are reduced, and the quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PTFE tube mold equipment, in particular to a PTFE tube production mold with adjustable bending. Background Art

[0002] Embolic interventional therapy covers a wide range of diseases, and microcatheter intubation is a necessary condition for the success of the operation. However, when faced with complex vascular anatomical structures such as extremely tortuous or narrow blood vessels, conventional microcatheters often fail to meet the needs, becoming a major problem that troubles surgeons. The application of adjustable microcatheters provides a solution to overcome such problems. PTFE wire lumen tube is used as the inner tube body, an integrated extrusion using existing processes, which helps to simplify the structure of the adjustable curved catheter, reduce production steps, and improve yield.

[0003] At present, domestic manufacturers of extruded and dispersed PTFE tubes can make internal multi-lumen or single-lumen tubes, but the external incision cavity of the tube is not yet produced. This is mainly due to the difficulty in adjusting the eccentricity of the equipment and the inability to effectively position the production mold. Therefore, an adjustable bend PTFE tube production mold is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a PTFE tube production mold with adjustable bending to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a production mold for an adjustable-bend PTFE tube, comprising a core mold shell for support;

[0006] A butt-jointed threaded barrel, the butt-jointed threaded barrel being fixedly disposed at the center of the upper end surface of the core mold shell;

[0007] A feed trough, the feed trough being arranged on a side end surface of the core mold shell near an upper portion;

[0008] A main core needle, which is fixedly clamped inside the core mold shell, and two groups of auxiliary core needles are arranged on the inner end surface of the core mold shell near the side of the main core needle;

[0009] A feed gap is provided between the main core needle, the auxiliary core needle and the core mold shell, and the feed gap is integrated and processed onto the core mold shell, which is foolproof during subsequent assembly and is simple and easy to operate.

[0010] Preferably, the docking threaded barrel and the core mold shell are integrally arranged, which can effectively improve the stability of subsequent extrusion shaping of the product.

[0011] Preferably, the core mold shell is made of steel, which can increase the service life of the mold.

[0012] Preferably, the feed trough passes through to the inner end surface of the core mold shell, which can improve the convenience and stability of subsequent feeding.

[0013] Preferably, the docking threaded cylinder and the core mold shell are through-connected, which can facilitate the subsequent rapid guiding and shaping of the raw material.

[0014] Preferably, the main core needle and the core mold shell are coaxially arranged, which can improve the accuracy of subsequent production of the product.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model integrates the feed gap into the core rod, there is no distinction between main and auxiliary core pins, the feed gap is fixed, and the eccentricity problem of the equipment does not need to be considered, which reduces the influencing factors of the product and improves the quality.

[0017] 2. The utility model can customize different wire pulling cavity positions, such as external cutting, internal cutting, embedded in the central cavity wall, different interval angles, symmetry or asymmetry, and can adapt to different cavity numbers, effectively improving the adaptability of the equipment.

[0018] 3. The mold of the utility model has high processing accuracy, and the feeding gap accuracy can reach ±0.01mm, thereby improving the accuracy of subsequent product processing dimensions.

[0019] 4. The utility model simplifies the adjustable bending pipe or special-shaped pipe into normal mold assembly or fool-proof assembly, and changes the self-adjusting centering of the mold into forced centering, thereby improving the convenience and accuracy of subsequent alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a disassembled diagram of the main body of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the main body of the utility model;

[0022] Figure 3 It is a partial enlarged view of location I of the utility model;

[0023] Figure 4 It is a front view of the main body of the utility model;

[0024] Figure 5 It is a front view of the main body of the utility model along the AA sectional view.

[0025] In the figure: 1-main core needle, 2-auxiliary core needle, 3-jointing threaded cylinder, 4-core mold shell, 5-feeding groove, 6-feeding gap. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 The utility model provides an embodiment: a PTFE tube production mold with adjustable bend, including a core mold shell 4 for supporting,

[0028] The butt-jointed threaded barrel 3 is fixedly arranged at the center of the upper end surface of the core mold housing 4;

[0029] A feed trough 5, which is provided on the side end surface of the core mold housing 4 near the upper part;

[0030] A main core needle 1, which is fixedly clamped in the interior of the core mold housing 4, and two sets of auxiliary core needles 2 are arranged on the inner end surface of the core mold housing 4 near the side of the main core needle 1;

[0031] A feed gap 6 is provided between the main core needle 1 and the auxiliary core needle 2 and the core mold shell 4. The feed gap 6 is integrated and processed onto the core mold shell 4, which is foolproof during subsequent assembly and is simple and easy to operate.

[0032] The butt-jointed threaded barrel 3 and the core mold shell 4 are integrally arranged, which can effectively improve the stability of subsequent extrusion shaping of the product.

[0033] The material of the core mold shell 4 is steel, which can increase the service life of the mold.

[0034] The feed trough 5 penetrates to the inner end surface of the core mold shell 4, which can improve the convenience and stability of subsequent feeding.

[0035] The butt-jointed threaded barrel 3 and the core mold shell 4 are through-connected, which can facilitate the subsequent rapid guiding and shaping of the raw material.

[0036] The main core needle 1 and the core mold shell 4 are coaxially arranged, which can improve the accuracy of subsequent product production.

[0037] Working principle: When in use, the utility model integrates the feed gap 6 into the core mold shell 4, which not only makes it easy to operate when the main core needle 1 and the auxiliary core needle 2 are assembled into the core mold shell 4, but also simplifies the adjustable bent pipe or special-shaped pipe into normal mold assembly or fool-proof assembly, thereby improving the convenience of subsequent assembly. At the same time, the self-adjusting centering of the mold can be changed to forced centering, thereby improving the accuracy of subsequent product production. At the same time, when processing the product, the material goes or part of it goes through the feed gap 6 processed on the core mold shell 4, thereby further improving the accuracy of product processing.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for producing an adjustable bend PTFE tube, comprising a core mold shell (4) for supporting, characterized in that: A butt-jointed threaded barrel (3), wherein the butt-jointed threaded barrel (3) is fixedly arranged at the center of the upper end surface of the core mold shell (4); A feed trough (5), the feed trough (5) being arranged on a side end surface of the core mold shell (4) near the upper portion; A main core needle (1), the main core needle (1) is fixedly clamped inside the core mold shell (4), and two groups of auxiliary core needles (2) are arranged on the side of the inner end surface of the core mold shell (4) close to the main core needle (1); A feeding gap (6) is provided between the main core needle (1), the auxiliary core needle (2) and the core mold shell (4).

2. The adjustable bend PTFE tube production mold according to claim 1, characterized in that: The butt-jointed threaded cylinder (3) and the core mold shell (4) are integrally arranged.

3. The adjustable bend PTFE tube production mold according to claim 2, characterized in that: The core mold shell (4) is made of steel.

4. The adjustable bend PTFE tube production mold according to claim 2, characterized in that: The feed trough (5) passes through to the inner end surface of the core mold shell (4).

5. The adjustable bend PTFE tube production mold according to claim 2, characterized in that: The butt-jointed threaded cylinder (3) and the core mold shell (4) are through-connected.

6. The adjustable bend PTFE tube production mold according to claim 2, characterized in that: The main core needle (1) and the core mold shell (4) are coaxially arranged.

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