Steamer for three-dimensional shaping of trouser crotch

By designing a three-dimensional shaped steam engine at the trouser gear, the combination of the concave mold and the concave mold master mold, combined with the cylinder lifting structure and the rotating disc, efficient three-dimensional shaped of the crotch part of the trouser is achieved, solving the problem of poor shaping of the crotch part in the prior art, and improving the comfort and aesthetics of wearing.

CN120158910APending Publication Date: 2025-06-17GUANGZHOU DEXIAN GARMENT CO LTD
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Patent Information

Application Number
CN202510499900.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2020-08-14
Publication Date
2025-06-17

AI Technical Summary

Technical Problem

The prior art is difficult to achieve three-dimensional shape of the skin on the crotch of the pants, resulting in uncomfortable wearing and insufficient aesthetic appearance.

Method used

A three-dimensional shaped steam engine with a trouser gear is designed, using a trouser mold and a concave mold master mold, combined with a cylinder lifting structure and a rotating disc, and through a high-temperature steam circulation positioning structure, the three-dimensional shaped pants hips and trouser gear are achieved.

Benefits of technology

It realizes effective and rapid shaping of the crotch of the pants, forms a three-dimensional effect that conforms to the human body shape, and improves the comfort and aesthetics of wearing.

✦ Generated by Eureka AI based on patent content.

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Abstract

A trouser crotch three-dimensional shaping steam engine comprises a machine body, a trouser-shaped male die sub-die and a trouser-shaped female die female die are arranged on the machine body, the male die sub-die is matched with the female die female die, the female die female die is arranged on the upper portion of the male die sub-die, a steam exhaust hole is formed in the concave face of the female die female die, an air suction hole is formed in the male die sub-die, and the male die sub-die and the female die female die are matched with each other. The steam exhaust hole is externally connected with a steam engine through a steam pipe, the air suction hole is externally connected with a suction fan through an air pipe, an air cylinder lifting structure is arranged on the machine body and connected with the female die female die, the air cylinder lifting structure is used for the female die female die to do ascending and downward pressing vertical movement based on the male die sub-dies, the number of the male die sub-dies on the machine body is two, and a rotating disc is arranged on the machine body. The device can realize high-temperature shaping drawing on the inner side and the outer side of the rear wave to form pre-shaping. The shaping steam engine is used for three-dimensional pulling and shaping processing of trousers crotches, is practical and effective, achieves mechanical processing, is provided with two male sub-dies, forms rotary alternate processing, and achieves high shaping efficiency.
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Description

Technical Field

[0001] The present invention relates to the technical field of clothing pants manufacturing, and is a three-dimensional shaping steam engine for the crotch of pants. Background Art

[0002] In the manufacturing of clothing pants, in the early stage, the pattern will be made according to the shape of the lower body of the human body. The lower part of the clothing is pants, and the pants are divided into several parts according to the human body; the waistband, the crotch, and the trouser legs. Among them, the crotch is the core part of the pants, which is a special part of the human body and has a large amount of movement. The crotch is composed of the front and back crotches. The existing technology only relies on the adjustment and improvement of the flat pattern. However, the pants are divided into four main pieces, and it is very difficult to achieve the concave and convex feeling that fits the skin, especially in the crotch part of the pants. The fabric in the crotch part of the human body is more or less uneven, which affects the beauty and comfort of wearing. Therefore, the three-dimensional shaping of the crotch plays a crucial role. Summary of the Invention

[0003] The main technical purpose of the present invention is to achieve the shaping of the crotch, so as to provide a three-dimensional shaping steam engine for the crotch of pants, which is used for three-dimensional shaping processing of the crotch of pants.

[0004] A three-dimensional shaping steam engine for the crotch of pants includes a machine body. A male die sub-mold and a female die master-mold in the shape of pants are provided on the machine body. The male die sub-mold and the female die master-mold are matched. The female die master-mold is arranged above the upper part of the male die sub-mold. Exhaust holes are provided on the concave surface of the female die master-mold, and suction holes are provided on the male die sub-mold. The exhaust holes are externally connected to a steam engine through a steam pipe, and the suction holes are externally connected to a suction fan through an air pipe.

[0005] A cylinder lifting structure is provided on the machine body and is connected to the female die master-mold, and is used for the female die master-mold to make vertical upward and downward movements based on the male die sub-mold.

[0006] The male die sub-mold is in the shape of the hip and back of the human body and has convex positions and crotch-fitting concave positions. The female die master-mold is provided with concave positions in the shape of the hip and back and crotch convex positions corresponding to the convex positions and crotch-fitting concave positions of the male die sub-mold.

[0007] Suction holes are provided on the surfaces of the convex positions and crotch-fitting concave positions, and exhaust holes are provided on the surfaces of the concave positions and crotch convex positions. A hollow part is respectively provided inside the male die sub-mold and the female die master-mold. The suction holes and the exhaust holes are communicated with the internal hollow part. Pipe connection ports corresponding to the internal hollow parts are provided on the male die sub-mold and the female die master-mold, and are respectively connected to the steam engine and the suction fan.

[0008] A steam switch and a ventilation switch are provided on the machine body for controlling the connection of the pipe orifices of the steam engine and the suction fan.

[0009] There are two punch sub - molds provided on the machine body. A rotating disk is arranged on the machine body. The punch sub - molds are respectively arranged on the rotating disk and are arranged horizontally side by side in opposite directions at the same horizontal plane.

[0010] The rotating disk is a shaft - rotating disk and can rotate 180 degrees in both forward and reverse directions.

[0011] An operation controller is also provided on the machine body. The cylinder lifting structure, the rotating disk, the steam - air switch, and the exhaust fan switch are respectively electrically connected to the operation controller.

[0012] The machine body also includes concave - convex molds. The molds include an inner shaping mold and an outer shaping mold. The inner shaping mold is used for the inner drawing and shaping of the pants buttocks, and the outer shaping mold is used for the outer drawing and shaping of the pants buttocks.

[0013] The overall shape of the inner shaping mold is semi - pants - buttock - shaped, including a matching inner concave mold and inner convex mold. The inner concave mold and the inner convex mold are respectively provided with pants - buttock gears. The inner concave mold is provided with pointed - cone concave surfaces in a pointed - cone shape on both sides with the pants gear as the boundary. The inner convex mold is provided with matching pointed - cone convex surfaces at positions corresponding to the pointed - cone concave surfaces of the inner concave mold on both sides with the pants gear as the boundary.

[0014] The outer shaping mold includes an outer concave mold and an outer convex mold. The outer concave mold is also provided with a pointed - cone concave surface two in a pointed - cone shape. The outer convex mold is provided with a pointed - cone convex surface two at a position matching the pointed - cone concave surface two.

[0015] The inner concave mold and the outer concave mold are respectively provided with air holes externally connected to an air extractor, and the outer convex mold and the inner convex mold are respectively provided with air holes externally connected to a steam engine.

[0016] It is used for high - temperature positioning and shaping of the crotch and buttocks. One side of the buttock position away from the crotch is the inner back rise, and the other side is the outer back rise. The inner back rise is provided with drawing and shaping positions on both sides with the pants gear as the boundary, and the outer back rise is also provided with drawing and shaping positions. The above - mentioned concave - convex molds are respectively used for high - temperature steam drawing of the drawing and shaping positions.

[0017] The temperature of the high - temperature steam positioning of the shaping machine is 120 degrees to 160 degrees.

[0018] The pressure of the high - temperature steam positioning of the shaping machine is 0.5 - 0.8 MP.

[0019] The beneficial effects of the present invention are:

[0020] 1. It is possible to perform high-temperature shaping and pulling on the inner and outer sides of the back rise of the back wave to form a predetermined shape. High-temperature steam pulling is respectively carried out on the pulling and shaping positions by using concave and convex molds. The inner and outer sides of the back fabric of the trouser material against the buttocks are effectively and quickly shaped by adhering to the molds. After the finished product is shaped, an effective predetermined shape is formed.

[0021] 2. It is possible to perform high-temperature steam shaping on the shaping machine equipped with a convex die sub-mold and a concave die master-mold in the shape of a trouser after washing and pressing, further deepening the shaping of the buttocks and crotch of the trousers and achieving a complete three-dimensional effect.

[0022] 3. The shaping machine is used for three-dimensional shaping processing of the crotch of the trousers, which is practical and effective and achieves mechanized processing.

[0023] 4. It is possible to put the trousers on the convex die sub-mold of the machine body and position them properly. The concave die master-mold presses down on the convex die sub-mold, and the steam holes and suction holes corresponding to the concave die master-mold and the convex die sub-mold assist in steam output and suction to form a high-temperature steam circulation positioning structure, enabling the buttocks and crotch parts of the trousers to be effectively and quickly shaped by adhering to the concave die master-mold and the convex die sub-mold.

[0024] 5. The concave die master-mold and the convex die sub-mold are matched and designed according to the three-dimensional model of the human body. Especially, the convex positions, the crotch fitting into the concave positions, the concave positions and the crotch convex positions are designed specifically for the crotch and hip circumference parts of the trousers. After the finished trousers are shaped, they fit better with the three-dimensional effect of the human hip circumference part, look more fitting and are more comfortable to wear.

[0025] 6. There are 2 convex die sub-molds arranged to form a rotating and alternating processing, further achieving high shaping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 are schematic diagrams of the inner and outer sides of the back rise of the buttock parts of the two back pieces of the trouser sheet;

[0027] Figure 2 is a front view structural schematic diagram of the shaping machine;

[0028] Figure 3 is a schematic diagram of the convex die sub-mold of the shaping machine used in the present invention;

[0029] Figure 4 is a schematic diagram of the concave die master-mold of the shaping machine used in the present invention;

[0030] Figure 5 is a schematic diagram of the inner shaping mold used on the inner side of the back rise of the trousers;

[0031] Figure 6 is a schematic diagram of the outer shaping mold used on the outer side of the back rise of the trousers.

[0032] In the figure: 1. Punch sub - die; 2. Die mother - die; 3. Steam intake hole; 4. Exhaust hole; 51. Steam - air switch; 52. Exhaust - air switch; 6. Rotating disk; 8. Cylinder lifting structure; 9. Operation controller; 11. Convex position; 12. Crotch - fitting concave position; 21. Concave position; 22. Crotch convex position; 111. Pulling and shaping position; 112. Inner shaping die; 113. Outer shaping die; 1121. Inner concave die; 1122. Inner convex die; 1131. Outer concave die; 1132. Outer convex die Detailed implementation mode

[0033] The present invention will be described below in conjunction with the attached drawings:

[0034] As shown in the attached Figures 1 to 6 drawing:

[0035] A three - dimensional crotch - shaping steam engine is used for the following processing;

[0036] A three - dimensional crotch - shaping processing method includes the following steps:

[0037] S1. Prepare the fabric. Loosen the fabric before cutting to allow the fabric to retract for 24 hours;

[0038] S2. Cut according to the required size into the sheet materials for forming the trousers: two pieces for each of the front and back panels;

[0039] S3. Set the hip part of the two back panels as the back crotch position, and perform high - temperature shaping and pulling on the inner and outer sides of the back crotch to form a pre - shaping;

[0040] S4. Sew, install the front and back pockets, install the zipper, attach the waistband, fix locally with buttons and make buttonholes to form a finished pair of trousers;

[0041] S5. Wash and iron the finished product;

[0042] S6. Finally, perform high - temperature positioning and shaping on the crotch and hip parts.

[0043] In step S3, one side of the hip part away from the crotch position is the inner side of the back crotch, and the other side is the outer side of the back crotch.

[0044] On the inner side of the back crotch, pulling and shaping positions are respectively arranged on both sides with the crotch position as the boundary. On the outer side of the back crotch, pulling and shaping positions are also arranged. Concave - convex molds are respectively used to perform high - temperature steam pulling on the pulling and shaping positions. The molds include an inner shaping die 112 and an outer shaping die 113. The inner shaping die 112 is used for pulling and shaping the inner side of the trousers hip, and the outer shaping die 113 is used for pulling and shaping the outer side of the trousers hip.

[0045] The described inner shaping mold 112 is integrally in the shape of a half-pant hip, including a matching inner female mold 1121 and inner male mold 1122. The inner female mold 1121 and inner male mold 1122 are respectively provided with pant hip gears. The inner female mold 1121 is provided with pointed cone concave surfaces in a pointed cone shape on both sides with the pant gear as the boundary. The inner male mold 1122 is provided with matching pointed cone convex surfaces at positions corresponding to the pointed cone concave surfaces of the inner female mold on both sides with the pant gear as the boundary.

[0046] The described outer shaping mold 113 includes an outer female mold 1131 and an outer male mold 1132. The outer female mold 1131 is also provided with a pointed cone concave surface two in a pointed cone shape. The outer male mold 1132 is provided with a pointed cone convex surface two that matches the position of the pointed cone concave surface two. The pointed cone concave surface and the pointed cone convex surface can simulate the concavities and convexities of special parts of the human body. The inner female mold 1121 and the outer female mold 1132 are respectively provided with air holes externally connected to an air extractor. The outer male mold 1122 and the inner male mold 1132 are respectively provided with air holes externally connected to a steam engine.

[0047] For the crotch and hip parts in step S5, a shaping machine provided with a convex mold sub-mold and a concave mold master-mold in the shape of a pant is used for high-temperature steam shaping.

[0048] In step S5, the temperature of the high-temperature steam positioning of the shaping machine is 120 degrees to 160 degrees.

[0049] In step S5, the pressure of the high-temperature steam positioning of the shaping machine is 0.5 - 0.8 MP.

[0050] For the hip parts of the two back panels, set them as the back rise positions, and perform high-temperature shaping and stretching on the inner and outer sides of the back rise to form a preliminary shape. Respectively use concave and convex molds to perform high-temperature steam stretching on the stretched and shaped positions. The inner and outer sides of the back panel fabric of the trouser material for the hip part are effectively and quickly shaped by adhering to the molds. After the finished product is shaped, after the trousers are processed and formed, a certain three-dimensional effect can be formed on the inner and outer sides of the hip that adheres to the human hip, making people wear more fitting and comfortable, and forming an effective preliminary shape.

[0051] After washing and ironing, use a shaping machine provided with a convex mold sub-mold and a concave mold master-mold in the shape of a pant for high-temperature steam shaping to further deepen the shaping of the hip and crotch of the trousers and achieve a complete three-dimensional effect.

[0052] A crotch three-dimensional shaping machine for a crotch three-dimensional shaping processing method includes a machine body. The machine body is provided with a convex mold sub-mold 1 and a concave mold master-mold 2 in the shape of a pant. The convex mold sub-mold 1 and the concave mold master-mold 2 are matched, with the concave mold master-mold 2 arranged above the convex mold sub-mold 1. The concave surface of the concave mold master-mold 2 is provided with exhaust holes 4. The convex mold sub-mold 1 is provided with suction holes 3. The exhaust holes 4 are externally connected to a steam engine through a steam pipe. The suction holes 3 are externally connected to an air extractor through an air pipe.

[0053] The body is provided with a cylinder lifting structure 8 connected to the female die 2, which is used for the female die 2 to move vertically upward and downward based on the male die insert 1.

[0054] The male die insert 1 is in the shape of a human hip and back pants, and is provided with a convex position 11 and a crotch fitting concave position 12. The female die 2 is provided with a hip and back shaped concave position 21 and a crotch convex position 22 corresponding to the convex position 11 and the crotch fitting concave position 12 of the male die insert 1.

[0055] The surfaces of the convex position 11 and the crotch fitting concave position 12 are both provided with suction holes 3, and the surfaces of the concave position 21 and the crotch convex position 22 are both provided with exhaust holes 4. The male die insert 1 and the female die 2 are respectively provided with a hollow part inside, and the suction holes 3 and the exhaust holes 4 communicate with the internal hollow part. The male die insert 1 and the female die 2 are provided with pipe connection ports corresponding to the internal hollow parts, which are respectively connected to a steam engine and a suction fan.

[0056] The body is provided with a steam and air switch 51 and an exhaust switch 52 for controlling the connection of the pipe orifices of the steam engine and the suction fan.

[0057] There are two male die inserts 1 provided on the body. The body is provided with a rotating disk 6. The two male die inserts 1 are respectively arranged on the rotating disk 6 and are arranged horizontally side by side and facing each other at the same horizontal plane. The rotating disk 6 is a disk driven by the rotation of a shaft and is a rotating disk that can rotate 180 degrees forward and backward. During operation, after the steam high-pressure shaping of one of the male die inserts 1 and the female die 2 is completed first, then the other male die insert 1 is rotated to the lower part of the female die 2 for steam high-pressure shaping, and the work is carried out in turn.

[0058] The body is also provided with an operation controller 9. The cylinder lifting structure 8, the rotating disk 6, the steam switch 51, and the exhaust switch 52 are respectively electrically connected to the operation controller 9. That is, the cylinder power drive of the cylinder lifting structure, the rotation drive of the rotating shaft in the rotating disk, the exhaust switch, and the steam switch are all controlled and connected to the operation controller 9 to achieve effective control.

[0059] Working principle

[0060] The operation steps of this equipment are as follows:

[0061] The first step: First, turn on the power and wait for the steam temperature of the equipment to reach about 120 degrees to 160 degrees.

[0062] Set the temperature, pressure, and operation time for the product to be processed as follows: For spring / summer cotton-like component products (temperature 130°C, pressure 0.5 - 0.6 MP, time 100 seconds), spring / summer chemical fiber blended component products (temperature 140°C, pressure 0.5 - 0.6 MP, time 120 seconds), autumn / winter cotton-like component products (temperature 140°C, pressure 0.6 - 0.7 MP, time 120 seconds), spring / summer chemical fiber blended component products (temperature 150°C, pressure 0.7 - 0.8 MP, time 130 seconds);

[0063] Step 2: Put the product to be processed onto the male die insert 1, making it fit smoothly, flat without wrinkles and excess parts. The position is centered on the crotch of the pants, from the crotch position of the buttocks to the waistband, with the trouser legs 20 cm below the crotch, and the entire back of the buttocks;

[0064] Start the foot-controlled exhaust switch to make the product on the male die insert 1 adhere flatly. Then, the cylinder lifting structure 8 drives the female die master die 2 to press downwards. Then, start the steam switch, and high-temperature steam (120°C to 160°C) sprays out from the steam holes of the female die master die 2. That is, a high-temperature steam circulation positioning structure is formed by the corresponding steam holes and suction holes of the female die master die and the male die insert to assist in steam output and suction, enabling the buttocks and crotch of the pants to adhere to the female die master die and the male die insert to achieve effective and rapid shaping. After shaping, the cylinder lifting structure 8 drives the female die master die 2 to rise, completing the shaping of the pants.

[0065] The female die master die and the male die insert are designed in cooperation with the three-dimensional model of the human body. The female die master die and the male die insert, especially the convex positions, the crotch fitting concave positions, the concave positions and the crotch convex positions are designed specifically for the crotch and hip circumference of the pants. After the finished pants are shaped, they fit better with the three-dimensional effect of the human hip circumference, look more fitting, and are more comfortable to wear.

[0066] The sizes of the female die master die and the male die insert can be divided into four sizes A, B, C, and D according to the pants size specifications and customer requirements. For size requirement A, there are four size numbers: 29, 30, 31, and 32; for size B, there are four size numbers: 33, 34, 35, and 36; for size C, there are four size numbers: 37, 38, 39, and 40; for size D, there are four size numbers: 41, 42, 43, and 44.

[0067] The shaping machine is used for three-dimensional shaping processing of the crotch of pants, which is practical and effective, achieving mechanized processing.

[0068] Put the pants onto the male die insert of the machine body and fix the position. The female die master die presses down on the male die insert, and a high-temperature steam circulation positioning structure is formed by the corresponding steam holes and suction holes of the female die master die and the male die insert to assist in steam output and suction, enabling the buttocks and crotch of the pants to adhere to the female die master die and the male die insert to achieve effective and rapid shaping.

[0069] The female die and the male die are matched, and designed according to the three-dimensional model of the human body. Especially, the convex parts, the crotch parts of the trousers are fitted to the concave parts, and the concave parts and the convex parts of the crotch are designed for the crotch and hip parts of the trousers. After the finished trousers are shaped, they fit better with the three-dimensional effect of the hip part of the human body, look more fitting, and are more comfortable to wear.

[0070] There are 2 male dies arranged thereon to form a rotating and alternating processing, further realizing high-efficient shaping efficiency.

[0071] The processing technology is simple and effective, and can be realized by mechanical die processing, achieving high precision and enabling mass production.

[0072] The above time, pressure and temperature are for product operation, and are divided into spring and summer, autumn and winter, and according to the cotton content, chemical fiber blended content. They are adjusted respectively according to the high temperature and stress characteristics of the fabric composition, thickness and special products. Finally, the above data are determined by combining the product test results.

[0073] The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. As long as there is no substantial change in the function and effect of this structure, it shall fall within the protection scope of the invention of this application, and any act falling within the protection scope of the present invention shall be deemed an infringement of the present invention.

Claims

1. A three-dimensional shaping steam engine for the crotch of trousers, comprising a machine body, characterized in that, The described machine body is provided with a male die sub-die (1) and a female die mother-die (2) in the shape of trousers. The male die sub-die (1) matches the female die mother-die (2). The female die mother-die (2) is arranged above the upper part of the male die sub-die (1). An exhaust hole (4) is provided on the concave surface of the female die mother-die (2), and an air suction hole (3) is provided on the male die sub-die (1). The exhaust hole (4) is externally connected to a steam engine through a steam pipe, and the air suction hole (3) is externally connected to a suction fan through an air pipe. A cylinder lifting structure (8) is provided on the machine body and connected to the female die mother-die (2) for the female die mother-die (2) to make vertical upward and downward movements based on the male die sub-die (1). The male die sub-die (1) is in the shape of a human buttocks and back trousers, and is provided with a convex position (11) and a crotch fitting concave position (12). The female die mother-die (2) is provided with a concave position (21) in the shape of buttocks and back and a crotch convex position (22) corresponding to the convex position (11) and the crotch fitting concave position (12) of the male die sub-die (1).

2. The three-dimensional shaping steam engine for the crotch of trousers according to claim 1, characterized in that: Air suction holes (3) are provided on the surfaces of the convex position (11) and the crotch fitting concave position (12). Exhaust holes (4) are provided on the surfaces of the concave position (21) and the crotch convex position (22). A hollow part is respectively provided inside the male die sub-die (1) and the female die mother-die (2). The air suction holes (3) and the exhaust holes (4) communicate with the internal hollow parts. Pipeline connection ports are provided on the male die sub-die (1) and the female die mother-die (2) corresponding to the internal hollow parts, and are respectively connected to the steam engine and the suction fan.

3. The three-dimensional shaping steam engine for the crotch of trousers according to claim 2, characterized in that: A steam and air switch (51) and an air extraction switch (52) are provided on the machine body for controlling the connection of the pipe orifices of the steam engine and the suction fan.

4. The three-dimensional shaping steam engine for the crotch of trousers according to claim 1, characterized in that: There are two male die sub-dies (1) provided on the machine body. A rotating disk (6) is provided on the machine body. The two male die sub-dies (1) are respectively arranged on the rotating disk (6) and are arranged side by side horizontally and facing each other at the same horizontal plane. The rotating disk (6) is a shaft rotating disk and can rotate 180 degrees in both positive and negative directions.

5. The three-dimensional shaping steam engine for the crotch of trousers according to claim 1, characterized in that: The machine body further includes a concave and convex mold. The described mold includes an inner shaping mold (112) and an outer shaping mold (113). The inner shaping mold (112) is used for the inner pulling and shaping of the trousers buttocks, and the outer shaping mold (113) is used for the outer pulling and shaping of the trousers buttocks.

6. The three-dimensional shaping steam engine for the crotch of trousers according to claim 5, characterized in that: The overall shape of the inner shaping mold (112) is semi-trouser buttocks-shaped, and includes a matching inner female die (1121) and an inner male die (1122). The inner female die (1121) and the inner male die (1122) are respectively provided with trouser buttock gears. On both sides of the inner female die (1121) with the trouser gear as the boundary, there are respectively provided pointed cone concave surfaces in the shape of a pointed cone. On both sides of the inner male die (1122) with the trouser gear as the boundary, there are respectively provided matching pointed cone convex surfaces corresponding to the positions of the pointed cone concave surfaces of the inner female die.

7. The three-dimensional shaping steam engine for the crotch of trousers according to claim 5, characterized in that: The outer shaping mold (113) includes an outer female die (1131) and an outer male die (1132). The outer female die (1131) is also provided with a pointed cone concave surface two in the shape of a pointed cone. The outer male die (1132) is provided with a pointed cone convex surface two matching the position of the pointed cone concave surface two.

8. The three-dimensional shaping steam engine for the crotch of trousers according to claim 6 or 7, characterized in that: The inner female die 1121 and the outer female die 1132 are respectively provided with air holes externally connected to an air extractor, and the outer male die 1122 and the inner male die 1132 are respectively provided with air holes externally connected to a steam engine.