Molding device and molding tool

Abstract

The application provides a plastic device and a plastic tool. The first plastic component comprises a first plastic base, a first positioning mandrel and a first heat insulation sheet. The second plastic component comprises a second plastic base, a second positioning mandrel and a second heat insulation sheet. In the plastic device and the plastic tool, the first plastic component or the second plastic component is selected, so that the problem of the radial cross-section deformation of the cut pipe is effectively solved, and the operation is simple and fast.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to molding devices and molding tooling. Background Technology

[0002] Medical catheters are mainly composed of polymer materials and an intermediate metal braided interlayer. The polymer materials have good thermoplasticity; however, after the catheter is cut, defects such as poor cut surfaces can occur due to various factors, reducing the production yield. These defects include smaller inner diameters and radial cross-sectional deformation. To ensure product yield, the cut tubing needs to be processed to meet subsequent production requirements. Therefore, how to easily and quickly address defects in the cut tubing to meet the needs of subsequent production has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] Therefore, it is necessary to provide a molding device and molding tooling to address the aforementioned technical problems.

[0004] According to a first aspect of this application, this application provides a molding apparatus, the molding apparatus comprising:

[0005] A first molding assembly, comprising a first molding base, a first positioning mandrel, and a first heat insulation sheet, wherein the first molding base has a limiting end face, the first positioning mandrel and the first heat insulation sheet are assembled on the limiting end face, and the first positioning mandrel is perpendicular to the first heat insulation sheet; and / or,

[0006] The second molding assembly includes a second molding base, a second positioning mandrel, and a second heat insulation sheet. The second molding base has a limiting groove with a groove sidewall and a groove bottomwall. The second positioning mandrel and the second heat insulation sheet are assembled on the groove bottomwall of the limiting groove, and the second positioning mandrel is perpendicular to the second heat insulation sheet.

[0007] In one embodiment, the first positioning mandrel includes a connected variable-diameter section and a fixed-diameter section, the proximal end of the variable-diameter section being connected to the distal end of the fixed-diameter section, the proximal end of the fixed-diameter section being fitted to the limiting end face of the first molding base, the diameter of the variable-diameter section gradually increasing from its distal end to its proximal end, and the diameter of the fixed-diameter section being equal to the diameter of the proximal end of the variable-diameter section; and / or,

[0008] Along the direction from the opening of the limiting groove to the bottom wall of the groove, the inner diameter of the limiting groove gradually decreases.

[0009] In one embodiment, the first positioning mandrel is vertically mounted to the limiting end face, and the first heat insulation sheet covers the remaining areas of the limiting end face where the first positioning mandrel is not mounted; and / or,

[0010] The sidewall of the groove has a first tilt angle relative to the central axis of the second positioning mandrel, and the bottom wall of the groove has a second tilt angle relative to the central axis of the second positioning mandrel. The first tilt angle is smaller than the second tilt angle. The second heat insulation sheet and the bottom wall of the groove are inclined to each other.

[0011] In one embodiment, the first heat insulation sheet is configured as an annular heat insulation sheet, and the first heat insulation sheet is fitted onto the outer periphery of the first positioning mandrel; and / or,

[0012] The second heat insulation sheet is configured as an annular heat insulation sheet, and the second heat insulation sheet is fitted onto the outer periphery of the second positioning mandrel.

[0013] In one embodiment, the fixed diameter section of the first positioning mandrel is configured to serve as a heating section; and / or,

[0014] The sidewalls of the limiting groove are configured to serve as a heating surface.

[0015] In one embodiment, the first molding base includes a main base and an appendage base, the diameter of the main base is larger than the diameter of the appendage base, and the main base and the appendage base are connected by a variable diameter base; the limiting end face is located on the end face of the appendage base away from the main base.

[0016] In one embodiment, the main body base has a heating groove, the opening of which is located on the end face of the main body base away from the appendage base, and the heating groove is configured for assembling heating devices.

[0017] In one embodiment, the main body base is configured as a cylindrical base with a fixed diameter, and the appendage base is configured as a frustum-shaped base with a gradually changing diameter, wherein the diameter of the appendage base gradually increases from the end away from the main body base to the end closer to the main body base.

[0018] In one embodiment, at least one of the first molding base and the second molding base is made of a thermally conductive metal; or...

[0019] At least one of the first molding base and the second molding base is made of stainless steel.

[0020] According to another aspect of this application, this application provides a molding tooling, comprising:

[0021] Molding device;

[0022] A temperature control device, comprising a temperature control element and a heating element, wherein the heating element is thermally connected to at least one of a first molding base and a second molding base in the molding device.

[0023] In the above-mentioned molding device and molding tooling, the problem of small inner diameter of the cut pipe can be solved by using the first molding component. The pipe to be molded is mounted on the first positioning mandrel, and the pipe to be molded is controlled to move toward the limiting end face. During the movement, a certain external force is applied so that the end face of the pipe abuts against the first heat insulation sheet on the limiting end face.

[0024] During this process, part or all of the first positioning mandrel is heated in any way. The heat transferred by the first positioning mandrel causes the tube to be shaped to deform, and the tube does not shrink back after deformation. This allows the inner diameter of the tube to be shaped after heat deformation to be consistent with the outer diameter of the first positioning mandrel, thereby completing the operation of expanding the inner diameter of the tube to be shaped.

[0025] To address the issue of radial cross-sectional deformation of the cut pipe, the aforementioned second molding component can be used. The pipe to be molded is mounted on the second positioning mandrel, and the pipe to be molded is controlled to move toward the bottom wall of the groove. During the movement, a certain external force is applied so that the cross-section of the pipe to be molded abuts against the second heat insulation sheet.

[0026] During this process, part or all of the second molding base is heated in any way, and the heat transferred by the first positioning mandrel makes the tube to be shaped come into contact with the side wall of the groove. Then, by means of the shape of the side wall of the groove, the tube to be shaped is controlled to deform under heat, and the radial cross-sectional shape correction of the tube to be shaped is completed.

[0027] Therefore, to address the issues of small inner diameter and radial cross-sectional deformation of the cut pipe, a first or second molding component can be used. Simply mount the pipe to be molded onto the first or second positioning mandrel and control the axial movement of the pipe. The operation is simple and quick. Attached Figure Description

[0028] Figure 1 A perspective view of a first molding component provided in one embodiment of this application.

[0029] Figure 2 A cross-sectional view of a first molding component provided in one embodiment of this application.

[0030] Figure 3 This is a partial structural diagram of a first molding component provided in one embodiment of this application.

[0031] Figure 4 A perspective view of a second molding component provided in one embodiment of this application.

[0032] Figure 5 A partial cross-sectional view of a second molding component provided in one embodiment of this application.

[0033] Figure 6 For example Figure 5 A partially enlarged view of the second molding component shown.

[0034] Icon labels:

[0035] 1000, First molding assembly; 2000, Second molding assembly;

[0036] 1100, First molding base; 1200, First positioning mandrel; 1300, First heat insulation sheet;

[0037] 1101, Limiting end face; 1102, Heating groove; 1110, Main body base; 1120, Accessory base; 1130, Variable diameter base;

[0038] 1210, Variable diameter shaft section; 1220, Fixed diameter shaft section;

[0039] 2100, Second molding base; 2200, Second positioning mandrel; 2300, Second heat insulation sheet;

[0040] 2110, limiting groove; 2111, groove sidewall; 2112, groove bottomwall. Detailed Implementation

[0041] This application provides a molding fixture, which includes a molding device and a temperature control device. The temperature control device includes a temperature controller and a heating element. The temperature controller is connected to the heating element, and the heating temperature of the heating element can be controlled by the temperature controller. The heating element can be thermally connected to at least one of the first molding base 1100 and the second molding base 2100 in the molding device, and can transfer heat to the first molding base 1100 or the second molding base 2100 when needed.

[0042] Regarding the molding device mentioned above, please refer to... Figures 1 to 6 As shown, the molding apparatus includes, Figures 1 to 3 The first molding component 1000 shown and as follows Figures 4 to 6 The second molding component 2000 is shown. (See also...) Figures 1 to 3 As shown, the first molding assembly 1000 includes a first molding base 1100, a first positioning mandrel 1200, and a first heat insulation sheet 1300. The first molding base 1100 is defined to have a limiting end face 1101. The limiting end face 1101 can be constructed to fit the shape of the first molding base 1100, such as square, circular, elliptical, or other different shapes, which are not limited here. The first positioning mandrel 1200 and the first heat insulation sheet 1300 are assembled on the limiting end face 1101, and the first positioning mandrel 1200 is perpendicular to the first heat insulation sheet 1300.

[0043] Therefore, to address the issue of the small inner diameter of the cut pipe, the aforementioned first molding component 1000 can be used to solve the problem, by fitting the pipe to be molded onto it. Figures 1 to 3 The first positioning mandrel 1200 shown controls the movement of the tube to be shaped toward the limiting end face 1101, and a certain external force is applied during the movement so that the end face of the tube abuts against the first heat insulation sheet 1300 on the limiting end face 1101.

[0044] During this process, part or all of the first positioning mandrel 1200 is heated in any way. The heat transferred by the first positioning mandrel 1200 causes the tube to be shaped to deform, and the tube does not shrink back after deformation. This allows the inner diameter of the tube to be shaped after heat deformation to be consistent with the outer diameter of the first positioning mandrel 1200, thereby completing the operation of expanding the inner diameter of the tube to be shaped.

[0045] See Figure 3 As shown, in one embodiment, the first positioning mandrel 1200 may include a connected variable-diameter shaft section 1210 and a fixed-diameter shaft section 1220, defined as follows: Figure 3 The right side shown is the distal end, such as... Figure 3 The left side shown is the proximal end; therefore, the proximal end of the variable diameter shaft section 1210 is connected to the distal end of the fixed diameter shaft section 1220. The proximal end of the fixed diameter shaft section 1220 is fitted onto the limiting end face 1101 of the first molding base 1100, as shown. Figure 3 As shown, the diameter of the variable diameter shaft section 1210 gradually increases from its distal end to its proximal end, and the diameter of the fixed diameter shaft section 1220 is equal to the diameter of the proximal end of the variable diameter shaft section 1210.

[0046] At this time, the fixed diameter section 1220 of the first positioning mandrel 1200 can be configured as a heating section, for example, by heating devices such as external heating rods, heating plates, and heating blocks to heat the fixed diameter section 1220 of the first positioning mandrel 1200. However, it is not limited to heating the variable diameter section 1210 at the same time.

[0047] Therefore, when the tube to be shaped is fitted onto the variable-diameter shaft section 1210 of the first positioning mandrel 1200, and the tube to be shaped is controlled to move towards the limiting end face 1101, the tube to be shaped can gradually change its inner diameter under heating conditions as it moves to the left, based on the diameter change of the variable-diameter shaft section 1210. Meanwhile, the first molding base 1100 can be made of a heat-conducting metal material, for example, stainless steel.

[0048] Regarding the relationship between the first heat insulation sheet 1300 and the limiting end face 1101, in one embodiment, the first positioning mandrel 1200 can be vertically mounted on the limiting end face 1101, and the first heat insulation sheet 1300 covers the limiting end face 1101 in parallel. When the first positioning mandrel 1200 is vertically mounted on the limiting end face 1101, it can occupy approximately the central position of the limiting end face 1101. Correspondingly, the first heat insulation sheet 1300 can cover other areas where the first positioning mandrel 1200 is not mounted in parallel. For example, the first heat insulation sheet 1300 is configured as an annular heat insulation sheet, and the first heat insulation sheet 1300 is fitted around the outer periphery of the first positioning mandrel 1200.

[0049] Continue reading Figures 4 to 6 As shown, the second molding assembly 2000 includes a second molding base 2100, a second positioning mandrel 2200, and a second heat insulation sheet 2300. The second molding base 2100 has a limiting groove 2110, which can be constructed into a suitable shape based on the molding requirements of the tube body, such as a cone, a frustum, or other different shapes, which are not limited here. The limiting groove 2110 has a groove sidewall 2111 and a groove bottom wall 2112. The second positioning mandrel 2200 and the second heat insulation sheet 2300 are assembled on the groove bottom wall 2112 of the limiting groove 2110, and the second positioning mandrel 2200 is perpendicular to the second heat insulation sheet 2300.

[0050] Therefore, the problem of radial cross-sectional deformation of the cut pipe can be solved by using the aforementioned second molding component 2000, which involves fitting the pipe to be molded onto the component. Figures 4 to 6 The second positioning mandrel 2200 shown controls the movement of the tube to be shaped toward the bottom wall 2112 of the groove, and applies a certain external force during the movement so that the cross section of the tube to be shaped abuts against the second heat insulation sheet 2300.

[0051] During this process, part or all of the second molding base 2100 is heated in any way, and the heat transferred by the first positioning mandrel 1200 causes the tube to be shaped to come into contact with the groove sidewall 2111. Then, by means of the shape of the groove sidewall 2111, the tube to be shaped is controlled to deform under heat, and the radial cross-sectional shape correction operation of the tube to be shaped is completed.

[0052] See Figure 5 As shown, in one embodiment, along the direction from the opening of the limiting groove 2110 to the bottom wall 2112 of the groove, i.e. Figure 5 From right to left, the inner diameter of the limiting groove 2110 gradually decreases. Therefore, the tube to be shaped is fitted into it... Figure 5When the tube to be shaped moves toward the bottom wall 2112 of the groove on the second positioning mandrel 2200 shown, the tube to be shaped can gradually deform under heat during the process of moving to the left based on the change in the inner diameter of the groove bottom wall 2112, thereby correcting the radial cross-sectional shape.

[0053] Continue reading Figure 5 and Figure 6 As shown, the groove sidewall 2111 has a first tilt angle relative to the central axis of the second positioning mandrel 2200, and the groove bottom wall 2112 has a second tilt angle relative to the central axis of the second positioning mandrel 2200. The first tilt angle is smaller than the second tilt angle. The second heat insulation sheet 2300 and the groove bottom wall 2112 are inclined to each other. At this time, the second heat insulation sheet 2300 is configured as an annular heat insulation sheet, and the second heat insulation sheet 2300 is fitted onto the outer periphery of the second positioning mandrel 2200.

[0054] At this time, the groove sidewall 2111 of the limiting groove 2110 can be configured as a heating surface, for example, by heating devices such as external heating rods, heating plates, and heating blocks to heat the groove sidewall 2111 of the limiting groove 2110. However, it is not limited to heating the groove bottom wall 2112 at the same time.

[0055] In one embodiment, the first molding base 1100 includes a main base 1110 and an appendage base 1120. The diameter of the main base 1110 is larger than the diameter of the appendage base 1120. The main base 1110 and the appendage base 1120 are connected by a variable-diameter base 1130. A limiting end face 1101 is located on the end face of the appendage base 1120 away from the main base 1110. The main base 1110 may have a heating groove 1102. The opening of the heating groove 1102 is located on the end face of the main base 1110 away from the appendage base 1120. The heating groove 1102 is configured to assemble a heating device, thereby receiving and transferring heat from the heating device.

[0056] In one embodiment, the main body base 1110 is configured as a cylindrical base with a fixed diameter, and the appendage base 1120 is configured as a frustum-shaped base with a gradually changing diameter, wherein the diameter of the appendage base 1120 gradually increases from the end away from the main body base 1110 to the end closer to the main body base 1110. Furthermore, the second molding base 2100 may be made of a thermally conductive metal. Alternatively, the second molding base 2100 may be made of stainless steel.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A molding device, characterized in that, The molding device includes: A first molding assembly (1000) includes a first molding base (1100), a first positioning mandrel (1200), and a first heat insulation sheet (1300). The first molding base (1100) has a limiting end face (1101). The first positioning mandrel (1200) and the first heat insulation sheet (1300) are assembled on the limiting end face (1101), and the first positioning mandrel (1200) is perpendicular to the first heat insulation sheet (1300); and / or, The second molding assembly (2000) includes a second molding base (2100), a second positioning mandrel (2200), and a second heat insulation sheet (2300). The second molding base (2100) has a limiting groove (2110), which has a groove sidewall (2111) and a groove bottom wall (2112). The second positioning mandrel (2200) and the second heat insulation sheet (2300) are assembled on the groove bottom wall (2112) of the limiting groove (2110), and the second positioning mandrel (2200) is perpendicular to the second heat insulation sheet (2300).

2. The molding apparatus according to claim 1, characterized in that, The first positioning mandrel (1200) includes a connected variable-diameter shaft section (1210) and a fixed-diameter shaft section (1220). The proximal end of the variable-diameter shaft section (1210) is connected to the distal end of the fixed-diameter shaft section (1220). The proximal end of the fixed-diameter shaft section (1220) is fitted onto the limiting end face (1101) of the first molding base (1100). The diameter of the variable-diameter shaft section (1210) gradually increases from its distal end to its proximal end. The diameter of the fixed-diameter shaft section (1220) is equal to the diameter of the proximal end of the variable-diameter shaft section (1210); and / or, Along the direction from the opening of the limiting groove (2110) to the bottom wall (2112) of the groove, the inner diameter of the limiting groove (2110) gradually decreases.

3. The molding apparatus according to claim 2, characterized in that, The first positioning mandrel (1200) is vertically mounted on the limiting end face (1101), and the first heat insulation sheet (1300) covers the other areas of the limiting end face (1101) where the first positioning mandrel (1200) is not mounted; and / or, The groove sidewall (2111) has a first tilt angle relative to the central axis of the second positioning mandrel (2200), and the groove bottom wall (2112) has a second tilt angle relative to the central axis of the second positioning mandrel (2200). The first tilt angle is smaller than the second tilt angle. The second heat insulation sheet (2300) and the groove bottom wall (2112) are inclined to each other.

4. The molding apparatus according to claim 3, characterized in that, The first heat insulation sheet (1300) is configured as an annular heat insulation sheet, and the first heat insulation sheet (1300) is fitted onto the outer periphery of the first positioning mandrel (1200); and / or, The second heat insulation sheet (2300) is configured as an annular heat insulation sheet, and the second heat insulation sheet (2300) is fitted around the outer periphery of the second positioning mandrel (2200).

5. The molding apparatus according to claim 2, characterized in that, The fixed diameter section (1220) of the first positioning mandrel (1200) is configured to serve as a heating section; and / or, The groove sidewall (2111) of the limiting groove (2110) is configured to serve as a heating surface.

6. The molding apparatus according to claim 1, characterized in that, The first molding base (1100) includes a main base (1110) and an appendage base (1120). The diameter of the main base (1110) is larger than the diameter of the appendage base (1120). The main base (1110) and the appendage base (1120) are connected by a variable diameter base (1130). The limiting end face (1101) is located on the end face of the appendage base (1120) away from the main base (1110).

7. The molding apparatus according to claim 6, characterized in that, The main body base (1110) has a heating groove (1102), the opening of the heating groove (1102) is located on the end face of the main body base (1110) away from the appendage base (1120), and the heating groove (1102) is configured for assembling heating devices.

8. The molding apparatus according to claim 6, characterized in that, The main body base (1110) is configured as a cylindrical base with a fixed diameter, and the appendage base (1120) is configured as a frustum-shaped base with a gradually changing diameter, and the diameter of the appendage base (1120) gradually increases from the end away from the main body base (1110) to the end closer to the main body base (1110).

9. The molding apparatus according to claim 1, characterized in that, At least one of the first molding base (1100) and the second molding base (2100) is made of a thermally conductive metal; or, At least one of the first molded base (1100) and the second molded base (2100) is made of stainless steel.

10. A molding tool, characterized in that, The molding tooling includes: The molding apparatus as described in any one of claims 1-9; A temperature control device, comprising a temperature control element and a heating element, wherein the heating element is thermally connected to at least one of a first molding base (1100) and a second molding base (2100) in the molding device.

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