Novel water pipe shoe sole mold based on 3D printing

Abstract

The utility model relates to a shoe sole production technology, and provides a novel water pipe shoe sole mold based on 3D printing, which comprises an upper mold and a lower mold, a first upper cavity of the upper die and a first lower cavity of the lower die are matched to form a first die cavity of one sole, a second upper cavity of the upper die and a second lower cavity of the lower die are matched to form a second die cavity of the other sole, and a first runner pipeline which is formed through 3D printing and extends along the shape of the sole is arranged on the first upper cavity of the upper die. The first flow channel pipeline and the second flow channel pipeline respectively convey steam to heat the first mold cavity and the second mold cavity, so that high-temperature fluid raw materials in the first mold cavity and the second mold cavity are fully vulcanized and formed; or the first flow channel pipeline and the second flow channel pipeline respectively convey cooling water to cool the first mold cavity and the second mold cavity, so that the vulcanized and molded shoe soles in the first mold cavity and the second mold cavity are cooled and shaped. The utility model solves the problems that the traditional steel mold is slow in heat conduction and poor in uniformity, and the local overburning or non-uniform cooling of the sole material is easily caused.

Description

Technical Field

[0001] This utility model relates to shoe sole production technology, and more particularly to a novel water pipe shoe sole mold based on 3D printing. Background Technology

[0002] In the footwear industry, shoe soles are commonly produced using hot-press molding molds. By rationally designing the mold's water system, functions such as rapid transport, cooling, and heating during the production process can be achieved, thereby accelerating the production pace, shortening the production cycle, and improving production efficiency. For example, Chinese patent document CN201711410760.X discloses an integrated molding mold for a midsole, including a rubber upper mold, a rubber middle plate, two shared bottom molds, a shaping mold middle frame, and a shaping mold upper mold; the shaping mold middle frame and the shaping mold upper mold are hinged; the shared bottom mold, the shaping mold middle frame, and the shaping mold upper mold are all equipped with circulating water channels, with the inlet and outlet of the circulating water channel in the shaping mold middle frame located on both sides of the shaping mold middle frame; the circulating water channels of the shaping mold upper mold and the shared bottom mold are connected to the circulating water channel of the shaping mold middle frame; the shared bottom mold, The circulating water channels in the frame of the shaping mold flow along the edge of the finished shoe sole area. The circulating water channels in the upper mold of the shaping mold flow through the center of the shoe sole inner core and around the edge of the mold cavity on the template. While this design achieves a certain cooling effect, thereby accelerating production, shortening the production cycle, and improving production efficiency, its structural limitations result in regional cooling of the mold, making it difficult to cool the formed shoe sole evenly. Furthermore, the cooling efficiency is low. Additionally, the mold relies on solid metal for heat transfer, which has high thermal resistance and low efficiency. Traditional steel molds have slow and uneven heat conduction, easily leading to localized overheating or uneven cooling of the shoe sole material. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a novel water pipe shoe sole mold based on 3D printing, which has a novel design, unique structure, uniform heat conduction, and high cooling efficiency.

[0004] To solve this technical problem, this utility model adopts the following solution: a novel water pipe shoe sole mold based on 3D printing, including an upper mold and a lower mold; the left and right parts of the upper mold are respectively provided with a first upper cavity and a second upper cavity, and the left and right parts of the lower mold are respectively provided with a first lower cavity and a second lower cavity. The first upper cavity of the upper mold and the first lower cavity of the lower mold cooperate to form the first mold cavity of a shoe sole, and the second upper cavity of the upper mold and the second lower cavity of the lower mold cooperate to form the second mold cavity of the other shoe sole. A first flow channel pipe, 3D printed and extending in the shape of the shoe sole, is provided on the first upper cavity of the upper mold, and the upper mold is located in the first flow channel. The inlet and outlet of the pipe are respectively equipped with a first reversing valve and a second reversing valve. The second lower cavity of the lower mold is provided with a second flow channel pipe that is 3D printed and extends in the shape of the shoe sole. The inlet and outlet of the second flow channel pipe of the lower mold are respectively equipped with a third reversing valve and a fourth reversing valve. The first flow channel pipe and the second flow channel pipe respectively deliver steam to heat the first mold cavity and the second mold cavity so that the high-temperature fluid raw material in the first mold cavity and the second mold cavity can be fully vulcanized and formed. Alternatively, the first flow channel pipe and the second flow channel pipe respectively deliver cooling water to cool the first mold cavity and the second mold cavity so that the vulcanized shoe sole in the first mold cavity and the second mold cavity can be cooled and shaped.

[0005] In a further improvement, the upper mold is a one-piece molded pure aluminum upper mold, and the lower mold is a one-piece molded pure aluminum lower mold.

[0006] In a further improvement, the surfaces of the upper and lower molds are respectively provided with a Teflon layer.

[0007] In a further improvement, both the first and second flow channels are vortex-type flow channels that extend and extend in a manner resembling the sole of a shoe.

[0008] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: The upper and lower molds are respectively provided with a first flow channel and a second flow channel formed by 3D printing; the upper mold is provided with a first reversing valve and a second reversing valve at the inlet and outlet of the first flow channel, respectively; and the lower mold is provided with a third reversing valve and a fourth reversing valve at the inlet and outlet of the second flow channel, respectively. The overall structural design is novel, resulting in the following beneficial effects:

[0009] (1) Uniform heat conduction: Complex flow channels can be customized through 3D printing to match the curved surface structure of the shoe sole, ensuring that heat energy penetrates evenly to detailed parts (such as anti-slip patterns).

[0010] (2) High heating and cooling efficiency: The new design achieves active injection and extraction of heat energy by directly contacting the first and second flow channels inside the mold with fluid (steam / water). The same piping system can quickly switch between delivering steam (heating) and cooling water (cooling) without disassembling the mold or switching external equipment, achieving seamless connection of the "heating-cooling" process. There is no downtime waiting time when switching between heating plates and water spray devices as required by the traditional process. The sum of the actual heating and cooling time of this mold is about half of the sum of the heating and cooling time of the traditional mold, and the heating and cooling efficiency is improved by 50%.

[0011] (3) Temperature uniformity: The internal first flow channel and second flow channel network ensures that the temperature difference on the mold surface is ≤ ±1.5℃ (compared to ±5℃ or more for traditional molds), thus avoiding defects such as warping and bubbles in the shoe sole material caused by temperature difference.

[0012] (4) Reduced energy consumption: The utilization rate of steam heat energy is increased to 85% (compared to only 50%-60% for traditional heating plates), and the cooling water is recycled to reduce water consumption by 90%.

[0013] Through further design, the mold life is effectively improved: the upper and lower molds made of pure aluminum have better thermal fatigue resistance than traditional mold steel, and their lifespan is extended by 2-3 times under rapid thermal cycling. Utilizing the high thermal conductivity of pure aluminum (237W / m·K, far higher than steel's 15-50 W / m·K) and the topology optimization structure of 3D printing, the vortex flow channel design allows for differentiated setting of mold channel density to achieve precise temperature control. This further solves the problems of slow heat conduction and poor uniformity in traditional steel molds, which can easily lead to local overheating or uneven cooling of the sole material. It can be widely promoted and applied. Attached Figure Description

[0014] Figure 1 This is a partial structural schematic diagram of the upper mold in an embodiment of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the lower mold in an embodiment of this utility model. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] refer to Figure 1 and Figure 2The preferred embodiment of this utility model, a novel water pipe shoe sole mold based on 3D printing, includes an upper mold 1 and a lower mold 2. The upper mold 1 has a first upper cavity 11 and a second upper cavity 12 on its left and right sides, respectively. The lower mold 2 has a first lower cavity 21 and a second lower cavity 22 on its left and right sides, respectively. The first upper cavity 11 of the upper mold 1 and the first lower cavity 21 of the lower mold 2 cooperate to form the first mold cavity of one shoe sole. The second upper cavity 12 of the upper mold 1 and the second lower cavity 22 of the lower mold 2 cooperate to form the second mold cavity of the other shoe sole. A 3D-printed first flow channel 13 extending in the shape of the shoe sole is provided on the first upper cavity 11 of the upper mold 1. A first reversing valve and a second reversing valve are respectively provided at the inlet 131 and outlet 132 of the first flow channel 13 on the upper mold 1. A 3D-printed second flow channel 2 extending in the shape of the shoe sole is provided on the second lower cavity 22 of the lower mold 2. 3. The lower mold 2 is equipped with a third reversing valve and a fourth reversing valve at the inlet 231 and outlet 232 of the second flow channel 23, respectively. The upper mold 1 is an integrally formed pure aluminum upper mold, and the lower mold 2 is an integrally formed pure aluminum lower mold. The first flow channel 13 and the second flow channel 23 are both vortex-type flow channel channels that extend randomly in the shape of the shoe sole. The first flow channel 13 and the second flow channel 23 respectively transport steam to heat the first mold cavity and the second mold cavity so that the high-temperature fluid raw materials in the first mold cavity and the second mold cavity can be fully vulcanized and formed. Alternatively, the first flow channel 13 and the second flow channel 23 respectively transport cooling water to cool the first mold cavity and the second mold cavity so that the vulcanized shoe sole in the first mold cavity and the second mold cavity can be cooled and shaped. The surfaces of the upper mold 1 and the lower mold 2 are respectively provided with a Teflon layer treated with Teflon to improve the corrosion resistance of the mold, that is, it can be used for a long time in strong acid and strong alkali environments without being corroded.

[0018] In use, a vacuum pump extracts steam generated by the steam engine. The outlet of the vacuum pump is connected to a first reversing valve at the inlet 131 of the first flow channel pipe 13 and a third reversing valve at the inlet 231 of the second flow channel pipe 23. Furthermore, a second reversing valve at the outlet 132 of the first flow channel pipe 13 and a fourth reversing valve at the outlet 232 of the second flow channel pipe 23 are also connected to the water tank input of the steam engine. During heating, steam generated by the steam engine is extracted by the vacuum pump, and the first and third reversing valves are controlled to switch and connect, so that the steam is sent into the first flow channel pipe 13 and the second flow channel pipe 23 to heat the first and second mold cavities, allowing the high-temperature fluid raw materials in the first and second mold cavities to be fully vulcanized and molded. Cooling water in the tank is drawn by a pump. The outlet of the pump is connected to the first reversing valve of the inlet 131 of the first flow channel pipe 13 and the other channel of the third reversing valve of the inlet 231 of the second flow channel pipe 23. The other channel of the second reversing valve of the outlet 132 of the first flow channel pipe 13 and the fourth reversing valve of the outlet 232 of the second flow channel pipe 23 is also connected to the water tank inlet of the cooling water. During cooling, the pump draws cooling water and controls the first and third reversing valves to switch to connect the first flow channel pipe 13 and the second flow channel pipe 23 to deliver cooling water to the first mold cavity and the second mold cavity respectively, so as to cool and shape the vulcanized sole in the first mold cavity and the second mold cavity. When conveying steam, the first, second, third, and fourth directional valves are all switched to the first flow channel pipe 13 and the second flow channel pipe 23, which are connected to the outlet of the steam pump and the water tank of the steam engine; when conveying cooling water, the first, second, third, and fourth directional valves are all switched to the first flow channel pipe 13 and the second flow channel pipe 23, which are connected to the outlet of the liquid pump and the water tank of the cooling water.

[0019] In the above embodiments, the first and second flow channels can also be other 3D-printed shapes such as curved or wavy flow channels that extend naturally like the sole of a shoe. The first, second, third, and fourth directional valves are all electromagnetic or proportional directional valves that can be connected to and automatically controlled by the control system.

[0020] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A novel water pipe shoe sole mold based on 3D printing, comprising an upper mold and a lower mold; characterized in that: The upper mold has a first upper cavity and a second upper cavity on its left and right sides, respectively. The lower mold has a first lower cavity and a second lower cavity on its left and right sides, respectively. The first upper cavity of the upper mold and the first lower cavity of the lower mold cooperate to form the first cavity of a shoe sole. The second upper cavity of the upper mold and the second lower cavity of the lower mold cooperate to form the second cavity of the other shoe sole. The first upper cavity of the upper mold is provided with a first flow channel that is 3D printed and extends in the shape of the shoe sole. The upper mold is provided with a first reversing valve and a second reversing valve at the inlet and outlet of the first flow channel, respectively. The lower mold has a second flow channel, which is 3D printed and extends in the shape of a shoe sole. The lower mold has a third reversing valve and a fourth reversing valve at the inlet and outlet of the second flow channel, respectively. The first flow channel and the second flow channel respectively deliver steam to heat the first mold cavity and the second mold cavity, so that the high-temperature fluid raw material in the first mold cavity and the second mold cavity can be fully vulcanized and formed. Alternatively, the first flow channel and the second flow channel respectively deliver cooling water to cool the first mold cavity and the second mold cavity, so that the vulcanized shoe sole in the first mold cavity and the second mold cavity can be cooled and shaped.

2. The novel water pipe shoe sole mold based on 3D printing according to claim 1, characterized in that: The upper mold is a one-piece molded pure aluminum upper mold, and the lower mold is a one-piece molded pure aluminum lower mold.

3. The novel water pipe shoe sole mold based on 3D printing according to claim 2, characterized in that: The surfaces of the upper and lower molds are respectively provided with Teflon layers.

4. The novel water pipe shoe sole mold based on 3D printing according to claim 1, characterized in that: Both the first and second flow channels are vortex-type flow channels that extend randomly in the shape of a shoe sole.

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