Forming die, preparation device and preparation method of corrugated self-coiling pipe

Abstract

The invention discloses a forming die, a preparation device and a preparation method of a corrugated self-winding pipe, the forming die comprises an inner die assembly and an outer die assembly, and the inner die assembly rotates relative to the outer die assembly. The inner die assembly comprises a self-coiling inner die and a corrugation forming inner die which are connected with each other, the outer die assembly comprises a self-coiling outer die and a corrugation forming outer die which are connected with each other, the self-coiling inner die is sleeved with the self-coiling outer die, and the corrugation forming inner die is sleeved with the corrugation forming outer die. An annular cavity is formed between the self-coiling outer mold and the self-coiling inner mold, the inner diameter of the self-coiling outer mold and the outer diameter of the self-coiling inner mold are gradually reduced in the first direction, the sheet-shaped base material forms a smooth surface self-coiling pipe through the annular cavity, and the first direction is the direction from the self-coiling inner mold to the corrugation forming inner mold. A corrugation forming cavity is formed between the corrugation forming outer mold and the corrugation forming inner mold and communicates with the annular cavity, and the smooth surface self-coiling pipe forms a corrugation self-coiling pipe through the corrugation forming cavity. Continuous production is achieved, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of conductive part preparation, and more specifically, to a forming die, a preparation device and a method for a corrugated self-rolling tube. Background Art

[0002] The new energy vehicle industry is increasingly demanding lightweight, energy-efficient, and safe components. Currently, some new energy vehicles are using impact-resistant self-winding tubing to protect key components, such as battery packs and motor wiring harnesses. Compared to traditional round self-winding textile tubing, the peaks and troughs of corrugated self-winding tubing can have different effects on the product. For example, the troughs can fit tightly against the covered material, increasing friction and preventing it from sliding. If the peaks are kept at a certain distance from the product, any impact from an external object will preferentially impact the peaks, absorbing the majority of the force and effectively reducing damage to the covered material.

[0003] In order to achieve complete forming from sheet to tube and then to corrugated shape, the existing technology requires multiple independent devices, such as a tube winding machine that first rolls the tube and then takes the rolled tube to a corrugated forming machine for forming. This not only increases equipment cost and floor space, but also makes process conversion cumbersome, affecting production efficiency and continuity. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a forming mold, a preparation device and a method for a corrugated self-rolling tube to realize the continuous production of the corrugated self-rolling tube.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A forming die for a corrugated self-rolling tube comprises: an inner die assembly and an outer die assembly, wherein the inner die assembly rotates relative to the outer die assembly;

[0007] The inner mold assembly includes a self-rolling inner mold and a corrugated inner mold connected to each other, and the outer mold assembly includes a self-rolling outer mold and a corrugated outer mold connected to each other, the self-rolling outer mold is sleeved outside the self-rolling inner mold, and the corrugated outer mold is sleeved outside the corrugated inner mold;

[0008] An annular cavity is provided between the self-rolling outer mold and the self-rolling inner mold. Along a first direction, the inner diameter of the self-rolling outer mold and the outer diameter of the self-rolling inner mold gradually decrease. The sheet substrate passes through the annular cavity to form a smooth self-rolling tube. The first direction is the direction from the self-rolling inner mold to the corrugated forming inner mold.

[0009] The inner wall of the corrugated outer mold is provided with a first molding structure, and the outer wall of the corrugated inner mold is provided with a second molding structure. The first molding structure and the second molding structure are clearance-matched. A corrugated molding cavity is formed between the corrugated outer mold and the corrugated inner mold. The corrugated molding cavity is connected to the annular cavity, and the smooth self-rolling tube forms a corrugated self-rolling tube through the corrugated molding cavity.

[0010] A device for preparing a corrugated self-rolling tube comprises: a driving mechanism and the above-mentioned forming die;

[0011] The inner mold assembly or the outer mold assembly is connected to the driving mechanism, and the driving mechanism drives the inner mold assembly or the outer mold assembly to rotate.

[0012] A method for preparing a corrugated self-rolling tube comprises the following steps:

[0013] Providing a sheet-like substrate, and conveying the sheet-like substrate to a forming mold for forming;

[0014] heating the forming mold;

[0015] The inner mold or the outer mold of the forming mold is driven to rotate and drive the sheet substrate to rotate and transmit, and the sheet substrate passes through the self-rolling unit and the corrugating forming unit of the forming mold in sequence, and the sheet substrate is self-rolled and corrugated to obtain a corrugated self-rolling tube;

[0016] The corrugated self-rolling tube is cooled and shaped.

[0017] The implementation of the present invention will have the following beneficial effects:

[0018] In the embodiment of the present invention, the inner mold assembly of the forming mold includes a self-rolling inner mold and a corrugated forming inner mold that are connected, and the outer mold assembly includes a self-rolling outer mold and a corrugated forming outer mold that are connected; an annular cavity is provided between the self-rolling outer mold and the self-rolling inner mold, and the size gradually decreases, and a corrugated forming cavity is formed between the corrugated forming outer mold and the corrugated forming inner mold. The inner mold assembly rotates relative to the outer mold assembly, driving the sheet substrate to pass through the annular cavity and the corrugated forming cavity in turn to self-roll and corrugate to obtain a corrugated self-rolling tube, thereby realizing continuous production from sheet to corrugated self-rolling tube, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] in:

[0021] Figure 1 This is a schematic diagram of a forming mold for a self-rolling corrugated tube provided in an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of a device for preparing a self-rolling corrugated tube provided in an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 A cross-sectional view along the A-A' direction.

[0024] Figure 4 This is another schematic diagram of the device for preparing the self-rolling corrugated tube provided in an embodiment of the present invention.

[0025] Figure 5 This is a cross-sectional view of the corrugated self-rolling tube provided in this embodiment of the invention.

[0026] 10-forming mold, 1-inner mold assembly, 11-self-winding inner mold, 12-corrugated forming inner mold, 121-second forming structure, 13-annular cavity, 2-outer mold assembly, 21-self-winding outer mold, 22-corrugated forming outer mold, 221-first forming structure, 23-corrugated forming cavity, 3-heating assembly, 20-driving mechanism, 30-unwinding mechanism, 40-cooling mechanism. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] Reference Figure 1 、 Figure 3 The present invention discloses a forming mold 10 for a corrugated self-rolling tube, comprising: an inner mold component 1 and an outer mold component 2, wherein the inner mold component 1 rotates relative to the outer mold component 2.

[0029] The inner mold assembly 1 includes a self-rolling inner mold 11 and a corrugated inner mold 12 connected to each other, and the outer mold assembly 2 includes a self-rolling outer mold 21 and a corrugated outer mold 22 connected to each other. The self-rolling outer mold 21 is sleeved on the outside of the self-rolling inner mold 11, and the corrugated outer mold 22 is sleeved on the outside of the corrugated inner mold 12.

[0030] An annular cavity 13 is provided between the self-rolling outer mold 21 and the self-rolling inner mold 11. Along the first direction, the inner diameter of the self-rolling outer mold 21 and the outer diameter of the self-rolling inner mold 11 gradually decrease. The sheet substrate passes through the annular cavity 13 to form a smooth self-rolling tube. The first direction is the direction from the self-rolling inner mold 11 to the corrugated forming inner mold 12.

[0031] A first molding structure 221 is provided on the inner wall of the corrugated molding outer mold 22, and a second molding structure 121 is provided on the outer wall of the corrugated molding inner mold 12. The first molding structure 221 and the second molding structure 121 are clearance-matched. A corrugated molding cavity 23 is formed between the corrugated molding outer mold 22 and the corrugated molding inner mold 12. The corrugated molding cavity 23 is connected to the annular cavity 13, and the smooth self-rolling tube forms a corrugated self-rolling tube through the corrugated molding cavity 23.

[0032] It should be noted that, in this embodiment, the inner mold assembly 1 rotates relative to the outer mold assembly 2. The outer mold assembly 2 may fix the inner mold assembly 1 to rotate. When the inner mold assembly 1 rotates, there is friction between the inner mold assembly 1 and the sheet substrate, thereby driving the sheet substrate to rotate and transmit. Similarly, the inner mold assembly 1 may also fix the outer mold assembly 2 to rotate.

[0033] Because the inner diameter of the self-winding outer mold 21 and the outer diameter of the self-winding inner mold 11 gradually decrease, the annular cavity 13 is a tapered annular cavity. As the sheet substrate is rotated and transported, it is gradually rolled into a tube from its original width until its edges overlap, resulting in a smooth self-winding tube. For example, the initial width of the sheet substrate is W, the outer diameter of the self-winding inner mold 11 facing away from the corrugated inner mold 12 is D1, the outer diameter of the self-winding inner mold 11 facing the corrugated inner mold 12 is D2, and the inner diameter of the smooth self-winding tube is D3. W = πD1 > πD2 = πD3; πD1 can also be greater than W to facilitate the sheet substrate's entry into the annular cavity 13.

[0034] The smooth self-rolling tube then passes through the corrugated forming cavity 23. While the smooth self-rolling tube is rotating and transported, the first forming structure 221 cooperates with the second forming structure 121 to form a corrugated shape on the surface of the smooth self-rolling tube to obtain a corrugated self-rolling tube.

[0035] Specifically, the first molding structures 221 are arranged in a spiral along the circumference of the inner wall of the corrugated outer mold 22 , and the second molding structures 121 are arranged in a spiral along the circumference of the outer wall of the corrugated inner mold 12 .

[0036] It can be understood that, compared with the traditional step-by-step process of first rolling the tube and then corrugating it, this embodiment integrates the self-rolling inner mold 11, the self-rolling outer mold 21, the corrugated forming inner mold 12, and the corrugated forming self-rolling outer mold 21 into a forming mold 10. The sheet substrate enters the mold, passes through the annular cavity 13 in turn to form a smooth tube, and then immediately enters the corrugated forming cavity 23 to form a corrugated tube. There is no need for pauses, transportation, or secondary clamping in the middle, thereby realizing continuous production, improving production efficiency, and reducing equipment costs.

[0037] In one embodiment, referring to Figure 3The first molding structure 221 is a groove that is recessed away from the corrugated molding inner mold 12, and the second molding structure 121 is a protrusion that protrudes toward the corrugated molding outer mold 22. The groove and the protrusion cooperate to press a corrugated shape on the surface of the self-rolling tube.

[0038] In other specific embodiments, the first molding structure 221 can be a protrusion protruding toward the corrugated molding inner mold 12, and the second molding structure 121 can be a groove recessed away from the corrugated molding outer mold 22. The protrusion and the groove cooperate to press a corrugated shape on the surface of the self-rolling tube.

[0039] In some optional embodiments, referring to Figure 2 The forming mold 10 of the corrugated self-rolling tube also includes a heating component 3, which is used to heat the inner mold component 1 and / or the outer mold component 2.

[0040] It should be noted that the sheet substrate is woven by warp and weft, the weft direction of the sheet substrate uses polyethylene terephthalate (PET) monofilament, and the warp direction of the sheet substrate uses one or more of polyester, polyamide, and polypropylene fibers.

[0041] It is understood that sheet substrates typically have high stiffness and yield strength at room temperature, making them difficult to deform significantly without cracking or excessive rebound. By providing a heated mold to heat the inner mold assembly 1 and / or outer mold assembly 2, and thereby transferring heat to the sheet substrate, the yield strength and elastic modulus of the material are significantly reduced, allowing it to be smoothly bent and curled within the annular cavity 13 to form a smooth tube and then pressed into a corrugated shape within the corrugation forming cavity 23, while reducing the risk of cracking.

[0042] Exemplarily, the heating component 3 is sleeved outside the outer mold component 2 and is in contact with the outer mold component 2 . Figure 3 In the example, the heating component 3 is mounted outside the outer mold component 2. The heating component 3 is a cylindrical heater. The heating component 3 includes a metal tube shell filled with an insulating thermal conductive oxide (such as MgO) and a built-in resistance wire (heating wire / alloy strip). The current passes through the resistance material to generate Joule heat, which is conducted to the mold.

[0043] Furthermore, the temperature of the heating component 3 is controlled at 140°C to 210°C. If the temperature is too low, the sheet substrate cannot be self-rolled, resulting in the opening not meeting the requirements. If the temperature is too high, the sheet substrate may be carbonized during the self-rolling process, thereby losing performance.

[0044] In some optional embodiments, the self-rolling inner mold 11 and the self-rolling outer mold 21 constitute a self-rolling unit, and the self-rolling unit includes two or more (not shown in the figure) arranged in sequence along the first direction. Along the first direction, the inner diameter of the self-rolling outer mold 21 and the outer diameter of the self-rolling inner mold 11 of each rolling unit gradually decrease; two adjacent self-rolling units are detachably connected.

[0045] It can be understood that by providing two or more self-winding units, the sheet substrate passes through multiple series-connected self-winding units in sequence. The first unit begins initial curling and diameter reduction, and the second unit continues curling and further reducing the diameter based on the smaller diameter formed by the first unit. And so on, the subsequent units continue to gradually reduce the diameter, thus improving the problem of wrinkling and unstable forming caused by excessive taper.

[0046] Furthermore, two adjacent self-rolling units can be detachably connected, and the self-rolling units can be adjusted and combined according to the initial width of the sheet substrate.

[0047] Reference Figure 2 The present invention also discloses a device for preparing a corrugated self-rolling tube, comprising: a driving mechanism 20 and a forming mold 10 of any one of the above embodiments; the inner mold assembly 1 or the outer mold assembly 2 is connected to the driving mechanism 20, and the driving mechanism 20 drives the inner mold assembly 1 or the outer mold assembly 2 to rotate.

[0048] In a specific embodiment, the drive mechanism 20 includes a motor, the drive shaft of the motor is connected to the center of the inner mold assembly 1, so that the motor drives the inner mold assembly 1 to rotate; when the drive shaft of the motor intersects with the axis of the inner mold assembly 1, the drive mechanism 20 also includes a gear set and a transmission shaft, the gear set includes meshing driving gears and driven gears, the driving gear is connected to the drive shaft of the motor, and the driven gear is connected to the center of the inner mold assembly 1 through the transmission shaft, the drive shaft of the motor drives the driving gear to rotate synchronously, the driving gear drives the driven gear to rotate, and the driven gear then drives the inner mold assembly to rotate through the transmission shaft.

[0049] Furthermore, the rotation speed of the drive shaft of the motor is kept consistent with the discharge speed of the self-rolling corrugated tube, so that the corrugated shape and spacing of the self-rolling corrugated tube can remain continuous and consistent during the forming process.

[0050] It can be understood that the preparation device of the corrugated self-rolling tube in this embodiment has a simple structure. The driving mechanism 20 drives the inner mold assembly 1 or the outer mold assembly 2 to rotate, so that the sheet substrate can complete self-rolling and corrugation forming through the forming mold 10. There is no need for pause, transportation, or secondary clamping in the middle, thereby realizing continuous production, improving production efficiency, and reducing equipment costs.

[0051] In some optional embodiments, referring to Figure 4 The preparation device of the corrugated self-rolling tube also includes an unwinding mechanism 30, a cooling mechanism 40 and a winding mechanism (not shown in the figure) arranged in sequence, and the forming mold 10 is arranged between the unwinding mechanism 30 and the cooling mechanism 40; the unwinding mechanism 30 is used to unwind the wound sheet substrate and transport it to the forming mold 10, the cooling mechanism 40 cools the corrugated self-rolling tube, and the winding mechanism is used to wind up the cooled corrugated self-rolling tube.

[0052] Furthermore, a cooling device cools the corrugated self-winding tube to a temperature of 80°C to 100°C, transforming the material from a plastic state to a rigid solid state. This prevents the hot, soft corrugated self-winding tube from being squeezed and deformed, facilitating the next step of winding. The figure illustrates an air-cooled cooling device as an example, but a water-cooled device could also be used.

[0053] The present invention also discloses a method for preparing a corrugated self-rolling tube, comprising the following steps:

[0054] (1) providing a sheet substrate, the sheet substrate is transported to the molding die 10 for molding.

[0055] (2) The forming die 10 is heated.

[0056] (3) The inner mold or outer mold of the forming mold 10 is driven to rotate to drive the sheet substrate to rotate and transmit. The sheet substrate passes through the self-rolling unit and the corrugation forming unit of the forming mold 10 in sequence. The sheet substrate is self-rolled and corrugated to obtain a corrugated self-rolling tube.

[0057] (4) Cooling and shaping the corrugated self-rolling tube.

[0058] It can be understood that the preparation method of the corrugated self-rolling tube in this embodiment has simple steps. The inner mold component 1 or the outer mold component 2 of the forming mold 10 is rotated to allow the sheet substrate to pass through the forming mold 10 to complete self-rolling and corrugation forming. There is no need for pause, transportation, or secondary clamping in the middle, thereby realizing continuous production, improving production efficiency, and reducing equipment costs.

[0059] In a specific embodiment, the forming mold 10 can be the forming mold 10 described in any of the above embodiments.

[0060] In step (1), the sheet substrate is unwound by the unwinding mechanism 30. Figure 4 The unwinding mechanism 30 includes a pay-off reel on which the sheet substrate is wound, with the axial direction of the pay-off reel parallel to the width direction of the sheet substrate. The unwinding mechanism 30 may also include a guide wheel shaft that guides the unwinding direction of the sheet substrate and transports it to the forming mold 10 for forming. Optionally, when the sheet substrate approaches the forming mold 10, the sheet substrate is pre-rolled into an annular substrate, the width of the sheet substrate being the circumference of the annular substrate, and the annular substrate is wrapped around the outside of the inner mold assembly 1 to facilitate the formation of the self-winding tube.

[0061] In step (2), combine Figure 1 The outer mold assembly 2 includes a first part and a second part, which cooperate to form a ring-shaped outer mold assembly 2. After the ring-shaped substrate surrounds the inner mold assembly 1, the first part and the second part are assembled outside the ring-shaped substrate. Figure 2 , and then the heating component 3 is placed outside the outer mold component 2 to heat the forming mold 10.

[0062] In step (3), the inner mold or outer mold of the forming mold 10 is driven to rotate and drive the sheet substrate to rotate and transmit. The sheet substrate passes through the self-rolling unit and the corrugating forming unit of the forming mold 10 in sequence. The sheet substrate is self-rolled and corrugated to obtain a corrugated self-rolling tube. Since the inner diameter of the self-rolling outer mold 21 and the outer diameter of the self-rolling inner mold 11 are gradually reduced, the annular cavity 13 is a conical annular cavity. While the sheet substrate is rotated and transmitted, it is gradually rolled into a tube from its original width until its edges have a degree of overlap. Figure 5 This is a cross-sectional view of the corrugated self-rolling tube in this embodiment.

[0063] The above-described embodiments merely represent several implementation methods of the present invention. 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 a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A forming die for a corrugated self-rolling tube, characterized in that: include: an inner mold assembly and an outer mold assembly, wherein the inner mold assembly rotates relative to the outer mold assembly; The inner mold assembly includes a self-rolling inner mold and a corrugated inner mold connected to each other, and the outer mold assembly includes a self-rolling outer mold and a corrugated outer mold connected to each other, the self-rolling outer mold is sleeved outside the self-rolling inner mold, and the corrugated outer mold is sleeved outside the corrugated inner mold; An annular cavity is provided between the self-rolling outer mold and the self-rolling inner mold. Along a first direction, the inner diameter of the self-rolling outer mold and the outer diameter of the self-rolling inner mold gradually decrease. The sheet substrate passes through the annular cavity to form a smooth self-rolling tube. The first direction is the direction from the self-rolling inner mold to the corrugated forming inner mold. The inner wall of the corrugated outer mold is provided with a first molding structure, and the outer wall of the corrugated inner mold is provided with a second molding structure. The first molding structure and the second molding structure are clearance-matched. A corrugated molding cavity is formed between the corrugated outer mold and the corrugated inner mold. The corrugated molding cavity is connected to the annular cavity, and the smooth self-rolling tube forms a corrugated self-rolling tube through the corrugated molding cavity.

2. The forming die for the corrugated self-rolling tube according to claim 1, characterized in that: A heating assembly is also included, and the heating assembly is used to heat the inner mold assembly and / or the outer mold assembly.

3. The forming die of the corrugated self-rolling tube according to claim 2, characterized in that: The heating component is sleeved outside the outer mold component and connected to the outer mold component.

4. The forming die for the corrugated self-rolling tube according to claim 1, characterized in that: The first molding structure is arranged in a spiral along the circumference of the inner wall of the corrugated molding outer mold, and the second molding structure is arranged in a spiral along the circumference of the outer wall of the corrugated molding inner mold.

5. The forming die for the corrugated self-rolling tube according to claim 4, characterized in that: The first forming structure is a groove that is recessed away from the corrugated forming inner mold, and the second forming structure is a protrusion that is protruded toward the corrugated forming outer mold, or, The first forming structure is a protrusion protruding toward the corrugated forming inner mold, and the second forming structure is a groove recessed away from the corrugated forming outer mold.

6. The forming die for the corrugated self-rolling tube according to claim 1, characterized in that: The self-rolling inner mold and the self-rolling outer mold constitute a self-rolling unit, and the self-rolling unit includes two or more units arranged in sequence along the first direction. Along the first direction, the inner diameter of the self-rolling outer mold and the outer diameter of the self-rolling inner mold of each self-rolling unit gradually decrease.

7. The forming die for the corrugated self-rolling tube according to claim 6, characterized in that: Two adjacent self-rolling units are detachably connected.

8. A device for preparing a corrugated self-rolling tube, characterized in that: include: A driving mechanism and a forming die according to any one of claims 1 to 7; The inner mold assembly or the outer mold assembly is connected to the driving mechanism, and the driving mechanism drives the inner mold assembly or the outer mold assembly to rotate.

9. The device for preparing a corrugated self-rolling tube according to claim 8, characterized in that: It also includes an unwinding mechanism, a cooling mechanism and a rewinding mechanism that are sequentially arranged, and the forming mold is arranged between the unwinding mechanism and the cooling mechanism; The unwinding mechanism is used to unwind the wound sheet-like substrate and transport it to the forming mold, the cooling mechanism cools the corrugated self-rolling tube, and the winding mechanism is used to wind up the cooled corrugated self-rolling tube.

10. A method for preparing a corrugated self-rolling tube, characterized in that: The following steps are involved: Providing a sheet-like substrate, and conveying the sheet-like substrate to a forming mold for forming; heating the forming mold; The inner mold or the outer mold of the forming mold is driven to rotate and drive the sheet substrate to rotate and transmit, and the sheet substrate passes through the self-rolling unit and the corrugating forming unit of the forming mold in sequence, and the sheet substrate is self-rolled and corrugated to obtain a corrugated self-rolling tube; The corrugated self-rolling tube is cooled and shaped.

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