A method for making a full wool chest lining for a men's suit suitable for a flow line

Abstract

The application provides a full wool lining chest lining manufacturing method for a male suit pipeline, which adopts a standard layered design of 5 layers and 9 cutting pieces, realizes the adhesive-free, pipeline batch production of the full wool lining chest lining through a series of processes such as constant temperature and humidity pretreatment, numerical control precise cutting, industrial wave type sewing machine sewing, machine'shell' on the special arc chest mold table and final shaping and pressing, and the core lies in that the industrial wave sewing replaces the traditional manual eight-character needle, the special equipment is combined to reproduce the manual shaping effect, the bottleneck of low efficiency, poor quality consistency and dependence on technician experience in the traditional process is effectively solved, and finally the finished suit has the high efficiency and high stability of industrialized production while maintaining the manual texture and three-dimensional chest shape.

Description

Technical Field

[0001] This invention relates to the field of industrialized garment production technology, and more specifically, to a method for manufacturing full wool lining chest lining for men's suits suitable for assembly lines. Background Technology

[0002] Full canvas construction is a hallmark of high-end suits, characterized by the absence of chemical adhesives and reliance on the physical support of natural canvas materials for shaping. The finished product boasts advantages such as a soft fabric, lasting crispness, and high durability, making it a core quality marker of high-end men's suits. However, the traditional production of full canvas suit chest panels suffers from several technical challenges, making it unsuitable for industrialized assembly line production and heavily reliant on manual techniques, such as stitching and figure-eight stitching.

[0003] In traditional craftsmanship, "hand-stitched chest lining" is a core technique in haute couture bespoke suits. Its full professional name is "hand-stitched front lining shaping process," also known as "hand-stitched chest lining." This crucial step involves using purely hand-stitched seams to secure the front fabric of the suit to the full lining (such as horsehair lining, horse tail lining, or charcoal lining), creating a three-dimensional chest shape. It is considered the "soul" of the chest shape in haute couture suits, and this key process relies on the manual operation of experienced craftsmen. The hand-stitched chest lining is not a visible decorative line, but rather a hidden hand-stitched seam between the front fabric and the lining. Its core purpose is to fix the lining, precisely fitting the full canvas (core support layer) to the front fabric to prevent the lining from shifting or wrinkling during wear; through the "tension control" of hand-stitched threads, the fabric and lining form a "natural memory" that follows the curve of the human chest, presenting a full, non-collapsed, firm, and non-stiff three-dimensional chest shape, shaping the chest; unlike the uniform tension of machine-stitched threads, hand-stitched threads can adjust the tightness according to the fabric texture, allowing the chest shape to naturally stretch with the movement of the human body, avoiding a "stiff feeling" (breathability).

[0004] Hand-stitched figure-eight stitch (professional term: hand-stitched figure-eight stitch) is the core stitching technique of the "shell-stitching" process and a key handcrafting technique for achieving "three-dimensional fixation and natural shaping" of the full-canvas lining. It is not a visible decorative line, but rather a "functional hidden thread" between the lining (horsehair lining / horse tail lining) and the front fabric. Through the figure-eight shaped crisscrossing stitches, it balances tension, fixes the lining, and ultimately shapes a high-quality bust shape that conforms to the human body. The essence of hand-stitched figure-eight stitch is to form an "elastic fixing structure" between the fabric and lining through the crisscrossing stitches—unlike the "rigid fixation" of machine-stitched straight lines, the crisscrossing shape of the figure-eight stitch acts like a "miniature spring," firmly fixing the lining without displacement while preserving the fabric's flexibility to move with the body, preventing the lining from becoming stiff and rigid. Its core characteristics are: ① The stitches are crossed in a "∧" or "∞" shape (similar to the figure eight); ② They are completely hidden between the fabric and lining, with no needle holes on the front; ③ The stitch length and crossing angle are dynamically adjusted according to the chest area, and are not uniformly arranged. Hand-stitching a single chest lining is extremely time-consuming and inefficient, and the quality is greatly affected by the technician's experience, resulting in poor consistency. The process cannot be standardized: there are no uniform parameters for the force, stitch density, and curvature adjustment of manual operations, making it impossible to form a replicable standardized process and difficult to integrate into continuous production lines. The material stability is insufficient; traditional processes lack precise environmental control (such as temperature and humidity) for the pretreatment of the lining material, leading to fluctuations in the moisture content of the lining fibers, which easily causes deformation and wrinkling during subsequent sewing, resulting in a high rate of rework. To address these problems, there is an urgent need for a standardized, production line-compatible, and efficient method for manufacturing full-canvas chest linings to overcome the industrialization bottleneck of full-canvas lining technology for high-end suits. Summary of the Invention

[0005] Therefore, this invention provides a method for manufacturing full-canvas chest lining for men's suits suitable for assembly lines, thereby achieving a standardized, assembly-line adaptable, and efficient method for manufacturing full-canvas chest linings that balances quality and texture.

[0006] To solve the above problems, this invention provides a method for manufacturing full-canvas chest lining for men's suits suitable for assembly lines, comprising: a material pretreatment step: placing charcoal lining, horsehair lining, and horsetail lining into a constant temperature and humidity regulating chamber for humidity balancing, and placing the chest lining into a steam pre-shrinking machine for pre-shrinking; a pattern cutting step: using a CNC cutting machine to cut 5 layers of 9 pattern pieces, the 5-layer structure including a first layer of chest lining pattern piece, a second layer of charcoal lining pattern piece with lapel seams, a third layer of horsehair lining pattern piece, a fourth layer of partial reinforcement layer, and a fifth layer of charcoal lining pattern piece, wherein the fourth layer of partial reinforcement layer includes two shoulder charcoal lining patches, two armhole charcoal lining patches, and a horsetail lining pattern piece; and a layer positioning step: on a positioning and shaping table, starting from the first layer... Lay the fabric pieces in reverse order from the fifth layer to the first layer, aligning them with the center line and shoulder line. Temporarily fix them with positioning pins at 5cm ± 0.5cm intervals. Industrial wave stitching steps: Use an industrial wave stitching machine to perform wave stitching from the inside out, from partial to overall, including sewing the fifth and fourth layers of appliqué, sewing the second and fifth layers, and sewing the first, second, third, and fourth layers. Machine lining steps: Use a special front chest positioning sewing machine on an arc-shaped chest mold table to perform front chest positioning stitching to fix the fabric and lining. Shaping and pressing steps: Place the chest lining on the arc-shaped chest mold table and use a steam press machine for shaping and pressing, then use suction cooling to set the shape.

[0007] Compared to existing technologies, the technical benefits of this solution are as follows: By constructing a complete process system encompassing material pretreatment, precise cutting, layering and positioning, industrial sewing, machine shaping, and final finishing, it fundamentally transforms the production of full-canvas lining chest panels from traditional handcrafting to modern assembly line production. Its technological advantage lies in integrating multiple discrete manual processes—originally reliant on the individual experience of experienced craftsmen, lacking standardization, and time-consuming—into a continuous, controllable, and repeatable industrial process. This fundamentally solves the industry bottleneck of mass production limitations in high-end men's suit full-canvas lining. This method ensures a stable and consistent quality foundation for each chest panel through sequential steps, eliminating chemical adhesives throughout the process and preserving the breathability, flexibility, and durability inherent in natural fiber linings. This allows the final suit to achieve industrial production efficiency while maintaining the crispness, natural memory, and wearing comfort comparable to bespoke handcrafted suits, providing crucial technical support for the large-scale market promotion of high-end suits.

[0008] In one embodiment of the present invention, the material pretreatment step further includes: setting the parameters of the constant temperature and humidity control chamber to a temperature of 25℃±1℃ and a humidity of 90%±2%, and letting it stand for 24 hours to control the fiber moisture content at 12%-15%; and setting the parameters of the steam pre-shrinking machine to a temperature of 60℃±2℃, a steam pressure of 0.2MPa, and a processing time of 5 minutes.

[0009] Compared to existing technologies, this technical solution achieves the following advantages: By precisely setting the process parameters for constant temperature and humidity control and steam pre-shrinking, it fundamentally solves the problem of dimensional instability in natural wool lining materials caused by environmental humidity and subsequent processing. Through precise control of fiber moisture content (12%-15%) and pre-treatment with steam heat shrinkage, it greatly eliminates the risk of shrinkage, wrinkling, or deformation of charcoal lining, horsehair lining, horse tail lining, and chest cotton due to environmental changes or washing after the finished product is made. This proactive material stability treatment ensures the accuracy of all subsequent precision cutting and sewing processes, significantly reduces the rework rate caused by the release of internal material stress, and lays a solid physical foundation for the long-term morphological stability and durable wear performance of the entire chest lining structure. It is a key guarantee linking high-quality raw materials with high-quality finished products.

[0010] In one embodiment of the present invention, the cutting step further includes: a first layer of chest cotton fabric made of wool cotton with a weight of 120 g / m²; a second layer of black charcoal lining fabric made of high-density wool black charcoal lining with a weight of 280 g / m²; a third layer of horsehair lining fabric made of pure horsehair fiber with a weight of 320 g / m²; a fourth layer of black charcoal lining patch for the shoulder opening and armholes made of wool black charcoal lining with a weight of 180 g / m²; a fourth layer of horsehair lining fabric made of a mixture of hemp fiber and horsehair in a weight ratio of 7:3 with a weight of 250 g / m²; and a fifth layer of black charcoal lining fabric made of wool black charcoal lining with a weight of 220 g / m².

[0011] Compared to existing technologies, the technical effects achieved by this solution are as follows: By limiting the specific material composition and unit weight of each layer in the 5-layer, 9-piece system, the scientific configuration and performance optimization of materials in different functional areas of the chest lining are realized. The physical properties of natural fiber linings of different weights and materials work synergistically: lightweight chest cotton provides comfortable cushioning, high-weight black charcoal lining with lapels ensures neckline shape retention, core horsehair lining provides lasting crispness and memory, localized patches enhance joint strength, and the outer black charcoal lining protects the high-grade fabric. This meticulously designed material combination acts like a miniature composite armor system, creating gradient support and functional reinforcement in key areas such as the shoulders, chest, and armholes. Together, they create a full, three-dimensional, free-moving, and durable chest shape, while ensuring the overall lightness and breathability of the suit's front, satisfying the ultimate pursuit of quality by high-end clients.

[0012] In one embodiment of the present invention, the cutting step further includes: when cutting the cut pieces, the horsehair lining is aligned with the vertical texture of the front piece of the suit along the growth direction of the horsehair, and the horsetail lining is aligned with the shoulder line along the direction of the hemp fibers.

[0013] Compared to existing technologies, this technical solution achieves the following effects: by specifying that the horsehair and horsetail linings must follow the specific orientation of their natural fibers during cutting and align with the front panel and shoulder line of the suit, a high degree of unity between material mechanical properties and ergonomic design is achieved. It maximizes the utilization of the excellent longitudinal support of horsehair fibers along their growth direction and the toughness and elasticity of the hemp fibers in the horsehair lining along their direction, ensuring that the core support field of the lining is precisely aligned with the force and movement direction of the human shoulder and chest. This directional cutting technology ensures that when wearing a suit, the chest lining's support effectively resists chest pressure to prevent sagging, while its elasticity allows it to naturally stretch and adapt to frequent shoulder and arm movements. This fundamentally avoids problems such as insufficient support, restricted movement, or localized wrinkles that may be caused by misalignment of the lining texture, achieving a perfect balance between crispness and flexibility.

[0014] In one embodiment of the present invention, the industrial wavy stitching step further includes: a first step: sewing a wavy line 1 cm from the edge of the fourth layer of fabric, with a stitch length of 0.8 cm ± 0.1 mm and a stitch density of 8 stitches / 3 cm; a second step: sewing a wavy line along the connecting line between the second and fifth layers; and a third step: sewing a wavy line along the chest contour line to fix the first, second, third, and fourth layers.

[0015] Compared to existing technologies, the technical effects achieved by this solution are as follows: By decomposing the sewing process of an industrial wave-shaped stitching machine into three sub-steps with clear order and objectives, the mechanized and standardized reproduction of the traditional complex hand-stitched figure-eight effect is realized. Utilizing the unique multi-dimensional tension and elasticity of the wave-shaped stitch, the cross stitches of the hand-stitched figure-eight are replaced, creating a flexible connection network between layers of lining that is both firmly fixed and allows for slight movement. This inside-out, local-to-overall sewing sequence ensures that the internal reinforcing structure is first stabilized, then gradually integrated with the core support layer, and finally with the outer layer, effectively avoiding interlayer displacement and suspension, making the entire chest lining a unified organic whole with balanced internal stress. While shaping the three-dimensional contour of the chest, the wave-shaped stitch itself acts like countless miniature springs, giving the chest lining a dynamic "breathing" feel that adapts to the body's breathing and movement, overcoming the rigidity and stiffness caused by straight stitches.

[0016] In one embodiment of the invention, in the first step, the shoulder seam is cut 3cm from the neckline and covered with a black charcoal lining patch to form a shoulder punch of 1-1.5cm.

[0017] Compared to existing technologies, this technical solution achieves the following effects: By making precise cuts at specific locations on the shoulder seam and covering them with high-elastic patches for fixation, it creatively realizes the crucial "shoulder allowance" shaping in traditional haute couture processes during industrial production. It actively breaks the tension balance of the flat lining in the shoulder area, and the space released through the cuts is locked by the elastic patch and transformed into a stable, three-dimensional allowance with a height between 1 and 1.5 centimeters. This structural design allows the suit's shoulder to perfectly wrap around the acromion, filling the natural gaps at the shoulder point and creating a full, rounded, and naturally transitioned shoulder contour, completely avoiding the flatness and constriction often found in machine-produced suits. Simultaneously, this shoulder allowance structure possesses a certain degree of dynamic adaptability, providing necessary allowance during arm movement, greatly improving wearing comfort and freedom of movement, and enhancing the durability of the shoulder seam.

[0018] In one embodiment of the present invention, the machine-stitched shell step further includes: a special front chest positioning sewing machine is an improved needle sewing machine with low-speed, high-torque output and a stitch length controlled between 0.8 and 1.2 mm.

[0019] Compared to existing technologies, the technical benefits of this solution are as follows: By employing a specially modified front-chest positioning sewing machine with low-speed, high-torque output and precise stitch control, it solves the problem that industrial equipment cannot simulate the subtle force and flexible stitching techniques of hand-stitching. This specialized machine can operate stably on curved surfaces, using an extremely fine stitch pitch of 0.8 to 1.2 mm to precisely replicate the "memory anchor point" function of hand-stitched figure-eight stitches between the fabric and lining. The machine's high torque ensures that the needle can smoothly penetrate multiple layers of high-density lining without stalling or breaking, while the precise tension control system ensures that each stitch is appropriately tight, achieving a strong bond between the lining and the fabric while retaining necessary elasticity. Thus, with the efficiency of an assembly line, it successfully creates a high-end chest shape that is crisp yet not stiff, close-fitting yet not tight, and has a handcrafted feel.

[0020] In one embodiment of the present invention, the machine-made chest mold step further includes: the curved chest mold platform is made of high-density solid wood with a polished surface, and its shape matches the contour of the human chest.

[0021] Compared to existing technologies, this technical solution achieves the following effects: By introducing an arc-shaped chest mold platform that perfectly matches the contours of the human chest as the supporting base for the machine's "shell-making" process, it provides a precise curved surface reference for flat materials during the three-dimensional shaping process. The polished, solid wood-carved platform simulates the real curvature of the human pectoral muscles, the shoulder line, and the angle of the side waist darts, ensuring that the fabric and multiple layers of lining laid on it are already in a pre-set three-dimensional state before sewing. During sewing, the curvature of the platform naturally distributes the tension at various points of the seam, ensuring that the resulting three-dimensional chest shape is evenly stressed and smoothly transitioned. This effectively avoids problems such as stiffness, internal stress concentration, or stitch distortion caused by forcibly shaping after sewing on a flat surface. It is the core carrier and quality guarantee for achieving the high-quality breast shape goal of "static crispness and dynamic fit."

[0022] In one embodiment of the present invention, the shaping and pressing step further includes: keeping the chest pad on the chest mold table for cooling after pressing, avoiding repeated pressing of the same area, and avoiding hand-sewn seam nodes.

[0023] Compared to existing technologies, this technical solution achieves the following effects: By employing a steam-pressing process on a curved chest mold platform matching the specified size, supplemented by suction cooling, the final curvature of the full wool-lined chest lining is solidified and stabilized long-term. The thermal and hygroscopic effect of steam activates the macromolecular chains of natural wool, horsehair, and other fibers, reshaping them to a pre-set ideal three-dimensional curve under the support of the curved platform. Rapid suction cooling then quickly "sets" the fibers in their new form, thus permanently fixing the three-dimensional chest shape created during the sewing stage. This method avoids fiber rebound deformation caused by improper cooling, ensuring the durability of the chest lining's curvature. Simultaneously, the requirements for repeated pressing and avoiding seam joints prevent fiber embrittlement and stitch shrinkage, guaranteeing the intrinsic quality and service life of the chest lining.

[0024] By adopting the technical solution of the present invention, the following technical effects can be achieved: (1) By constructing a complete process system that includes material pretreatment, precise cutting, layer positioning, industrial sewing, machine shaping, and final shaping, a fundamental transformation of full-canvas chest lining from traditional handcrafting to modern assembly line production has been achieved. Its technical effect lies in integrating multiple discrete manual processes that originally relied on the personal experience of senior technicians, were non-standardized, and time-consuming into a continuous, controllable, and repeatable industrial process. This fundamentally solves the industry bottleneck of mass production of high-end men's suit full-canvas lining. This method ensures that each chest lining piece achieves a stable and consistent quality foundation through sequential steps, completely eliminating chemical adhesives and retaining the unique breathability, flexibility, and durability of pure natural fiber lining. This allows the final suit to achieve industrial production efficiency while still rivaling the crispness, natural memory, and wearing comfort of handcrafted haute couture suits, providing key technical support for the large-scale market promotion of high-end suits. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a flowchart illustrating a method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines, as provided in an embodiment of the present invention. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] [First Embodiment] See Figure 1 This invention provides a method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines, comprising: S100: Material pretreatment steps: Place the charcoal lining, horsehair lining and horse tail lining into a constant temperature and humidity control chamber for humidity balancing, and place the chest cotton into a steam pre-shrinking machine for pre-shrinking; S200: Piece cutting steps: Use a CNC cutting machine to cut 9 pieces in 5 layers. The 5-layer structure includes the first layer of chest cotton piece, the second layer of black charcoal interfacing piece with folding seams, the third layer of horsehair interfacing piece, the fourth layer of partial reinforcement layer, and the fifth layer of black charcoal interfacing piece. The fourth layer of partial reinforcement layer includes two black charcoal interfacing patches for the shoulder openings, two black charcoal interfacing patches for the armholes, and one horsehair interfacing piece. S300: Layer positioning steps: Lay the cut pieces in reverse order from the fifth layer to the first layer on the positioning and shaping table, align the center line and shoulder line, and temporarily fix them with positioning pins at intervals of 5cm±0.5cm; S400: Industrial wave stitching procedure: Using an industrial wave stitching machine, perform wave stitching in the order from the inside out and from the part to the whole, including sewing the fifth and fourth layers of appliqué, sewing the second and fifth layers, and sewing the first, second, third and fourth layers. S500: Machine shell stitching steps: Use a special front chest positioning sewing machine on the curved chest mold table to perform the front chest positioning stitching process to fix the fabric and lining. S600: Shaping and pressing steps: Place the chest pad on the curved chest mold table, use a steam press machine to shape and press, and then exhaust air to cool and set the shape.

[0028] Specifically, the material functions are partitioned through a precise 5-layer, 9-piece design. Industrial wave-type sewing machines replace traditional hand-stitched stitches to industrialize key processes, supplemented by localized manual adjustments to ensure texture. No chemical adhesives are used throughout the process, ultimately resulting in a fully wool-lined chest lining manufacturing process suitable for assembly lines. Details are as follows: (I) Layered Piece Design: 5-Layer Structure and 9-Piece Definition. All pieces are made of full wool / natural fiber material. The materials, components, and functions of the 5-layer structure and the corresponding 9 pieces are shown in Table 1 below: Table 1. Material and Functional Parameters of 5-Layer 9-Piece Cutting Pieces The material pretreatment process involves placing the charcoal lining, horsehair lining, and horsetail lining into a temperature and humidity controlled chamber with parameters set as follows: temperature 25℃±1℃, humidity 90%±2%, and allowing them to stand for 24 hours to balance the fiber moisture content (controlled at 12%-15%), preventing subsequent deformation. The chest cotton is placed in a steam pre-shrinking machine with parameters set as follows: temperature 60℃±2℃, steam pressure 0.2MPa, and processing time 5 minutes, to complete the pre-shrinking and prevent shrinkage after the finished product is worn. All material surfaces are cleaned with an anti-static brush (material: pig bristles) to ensure no lint residue remains, preventing thread jamming during sewing. The precise cutting process uses a CNC cutting machine to cut 9 pieces with a cutting accuracy controlled within ±0.5mm, ensuring no rough edges or fiber splitting on the cut pieces. During cutting, the material is positioned according to the grain: the horsehair lining is aligned with the vertical grain of the front of the suit piece along the direction of the horsehair growth, and the horsetail lining is aligned with the shoulder line along the direction of the hemp fibers, ensuring that the lining support is consistent with the direction of human movement. In the layered positioning and fixing process, on the positioning and shaping table, the cut pieces are laid out in reverse order: "fifth layer → fourth layer → third layer → second layer → first layer," ensuring that all cut piece baselines (center line, shoulder line) are completely aligned. Each layer of cut pieces is temporarily fixed at 5cm ± 0.5cm intervals, with the positioning pins avoiding the subsequent sewing area. The industrial wave-type stitching process uses an industrial wave-type stitching machine, sewing on a specific worktable in a "from inside to outside, from partial to overall" sequence. Specific parameters are as follows: Step 1: Sew the fifth and fourth layers of appliqué. Sew a wavy line 1cm along the edge of the appliqué, with a stitch length of 0.8cm±0.1mm and a stitch density of 8 stitches / 3cm (four waves) to create shoulder padding. Shoulder padding is the three-dimensional allowance that extends beyond the shoulder point. It is achieved by "cutting to release tension + appliqué to lock the allowance". The shoulder seam of the chest lining is a multi-layer full wool lining (horse mane lining + charcoal lining) spliced ​​structure. The original shoulder seam tension is uniform and cannot naturally form a three-dimensional curve. Cutting the shoulder seam 3cm from the neckline can break the original tension balance and release the extension space of the lining towards the shoulder point. Then cover with a high-elastic wool charcoal lining appliqué. Through the elastic support of the appliqué and the fixation of the hand sewing, the extension space is transformed into a stable 1-1.5cm three-dimensional allowance (shoulder padding) while preventing the lining from loosening at the cut.

[0029] Optimize shoulder shape and three-dimensionality: The shoulder padding can fill the gap of the acromion, avoid the shoulder shape being flat and narrow, and create a "natural, full and not bulky" high-end shoulder shape to suit different shoulder widths; Adaptable to human movement: The elasticity of the patch can be adjusted to slightly adjust the amount of shoulder support as the arm moves, avoiding shoulder tightness and solving the problem of "limited movement" in traditional fixed shoulder types; Enhanced structural durability: Appliqués can reinforce the strength of the lining at the cut, prevent wear and deformation of the shoulder seams after long-term wear, extend the service life of the suit, and ensure the long-term stability of the shoulder line curvature.

[0030] Step 2: Sew the second and fifth layers together along the connecting line and the wavy backstitch to ensure a close fit to the body; Step 3: Sew the first, second, third, and fourth layers; sew along the chest contour line, maintaining the fluffiness of the chest cotton. Check the seams of the pieces, ensuring there are no broken threads, no through-needle stitches, and no gaps between layers.

[0031] Step 4: Perform a special machine shell-making process on the breast mold platform.

[0032] Specifically, the curved platform (breast model platform) includes: Material and structure: It is made of high-density solid wood (beech, pine, etc.) spliced ​​and carved, with a polished surface (to ensure smooth fabric sliding without damaging the fibers). Its shape is based on the three-dimensional data of the male human chest (chest width, chest height, shoulder line curvature, side waist dart angle, etc.), and is a three-dimensional replica of the human chest contour. Core Functions: Curved Surface Support: Provides curved surface support for the fabric and lining to perfectly conform to the human chest, allowing the stitches to naturally follow the curve of the chest and avoiding the flat and stiff chest shape caused by flat sewing; Tension Uniformity: When the fabric and lining are laid on the curved platform, the curvature of the platform will naturally distribute the tension in each area, ensuring that each stitch is evenly stressed, ultimately presenting a "full and breathable" chest shape (naturally stretching with the body's movements); Standardized Process: The standardized curvature of the bust model platform can be customized according to size and body type, ensuring the consistency of the chest shape in small-batch production and reducing reliance on the experience of senior technicians. It is the key carrier of the "handmade texture + industrial precision" of haute couture craftsmanship.

[0033] Specifically, after the full wool-lined chest lining is sewn, it needs to be precisely shaped and pressed to fix the chest shape and enhance the fit between the lining and the fabric. First, lay the chest lining flat on a curved chest mold (matching the suit size). After checking that there are no gaps between the layers, use a professional steam press to shape and press it. After pressing, keep the chest lining on the chest mold to cool it with suction air to prevent the fibers from springing back. Note: Do not repeatedly press the same area to prevent the wool lining fibers from becoming brittle; avoid hand-sewn seams during pressing to prevent the stitches from shrinking and deforming, ultimately ensuring that the chest lining is crisp, wrinkle-free, and conforms to the shape of the human chest.

[0034] The preferred combination of the "shell-making" process, specialized machines, and curved chest mold table plays a crucial role in the industrialization of full-canvas suits. It retains the ultimate pursuit of "human curve fit" in handcraftsmanship, while achieving stability and efficiency in the process through machines and standardized tables. Ultimately, this allows the chest of haute couture suits to present a high-end texture that is "crisp but not stiff, fitted but not tight," becoming the technical cornerstone of haute couture suits' "three-dimensional shape and timeless durability."

[0035] Preferably, by constructing a complete process system encompassing material pretreatment, precise cutting, layering and positioning, industrial sewing, machine shaping, and final finishing, a fundamental transformation has been achieved from traditional handcrafting of full-canvas chest linings to modern assembly line production. The technological advantage lies in integrating multiple discrete handcrafting steps—originally reliant on the individual experience of experienced craftsmen, lacking standardization, and time-consuming—into a continuous, controllable, and repeatable industrial process. This fundamentally solves the industry bottleneck of mass production limitations in high-end men's suit full-canvas lining. This method ensures a stable and consistent quality foundation for each chest lining piece through sequential steps, eliminating chemical adhesives throughout the process and preserving the unique breathability, flexibility, and durability of pure natural fiber linings. This allows the final suit to achieve industrialized production efficiency while still rivaling the crispness, natural memory, and wearing comfort of handcrafted haute couture suits, providing crucial technological support for the large-scale market promotion of high-end suits.

[0036] Specifically, the material pretreatment steps also include: setting the parameters of the constant temperature and humidity control chamber to 25℃±1℃ and 90%±2% humidity, and letting it stand for 24 hours to control the fiber moisture content at 12%-15%; setting the parameters of the steam pre-shrinking machine to 60℃±2℃, 0.2MPa steam pressure, and 5 minutes processing time.

[0037] Preferably, by precisely setting the process parameters for constant temperature and humidity control and steam pre-shrinking, the dimensional instability of natural wool lining materials caused by environmental humidity and subsequent processing is fundamentally solved. Through precise control of fiber moisture content (12%-15%) and pre-treatment with steam heat shrinkage, the risks of shrinkage, wrinkling, or deformation of charcoal lining, horsehair lining, horse tail lining, and chest cotton due to environmental changes or washing after production are greatly eliminated. This proactive material stability treatment ensures the accuracy of all subsequent precision cutting and sewing processes, significantly reduces the rework rate caused by the release of internal material stress, and lays a solid physical foundation for the long-term morphological stability and durable wear performance of the entire chest lining structure. It is a key guarantee linking high-quality raw materials to high-quality finished products.

[0038] Specifically, the cutting steps also include: the first layer of chest cotton fabric is made of wool cotton with a weight of 120g / ㎡; the second layer of black charcoal interfacing fabric is made of high-density wool black charcoal interfacing with a weight of 280g / ㎡; the third layer of horsehair interfacing fabric is made of pure horsehair fiber with a weight of 320g / ㎡; the fourth layer of black charcoal interfacing patches for the shoulder opening and armholes is made of wool black charcoal interfacing with a weight of 180g / ㎡; the fourth layer of horsehair interfacing fabric is made of a mixture of hemp fiber and horsehair in a weight ratio of 7:3 with a weight of 250g / ㎡; and the fifth layer of black charcoal interfacing fabric is made of wool black charcoal interfacing with a weight of 220g / ㎡.

[0039] Preferably, by defining the specific material composition and unit weight of each layer in the 5-layer, 9-piece fabric system, the scientific configuration and performance optimization of materials in different functional areas of the chest lining are achieved. The physical properties of natural fiber linings of different weights and materials work synergistically: lightweight chest cotton provides comfortable cushioning, high-weight black charcoal lining with lapels ensures neckline shape retention, core horsehair lining provides lasting crispness and memory, localized patches enhance joint strength, and the outer black charcoal lining protects the high-grade fabric. This meticulously designed material combination acts like a miniature composite armor system, creating gradient support and functional reinforcement in key areas such as the shoulders, chest, and armholes. Together, they create a full, three-dimensional, free-moving, and durable chest shape, while ensuring the overall lightness and breathability of the suit's front, satisfying the ultimate pursuit of quality by high-end clients.

[0040] Specifically, the cutting steps also include: when cutting the pieces, the horsehair lining is aligned with the vertical grain of the front piece of the suit along the direction of the horsehair growth, and the horsehair lining is aligned with the shoulder line along the direction of the hemp fibers.

[0041] Preferably, by specifying that the horsehair and horsetail linings must follow the specific orientation of their natural fibers during cutting and align with the direction of the front panel and shoulder line of the suit, a high degree of unity between material mechanical properties and ergonomic design is achieved. This maximizes the utilization of the excellent longitudinal support of horsehair fibers along their growth direction and the toughness and elasticity of the hemp fibers in the horsehair lining along their direction, ensuring that the core support field of the lining is precisely aligned with the force and movement direction of the human shoulder and chest. This directional cutting technique ensures that when wearing the suit, the chest lining's support effectively resists chest pressure to prevent sagging, while its elasticity allows it to naturally stretch and adapt to frequent shoulder and arm movements. This fundamentally avoids problems such as insufficient support, restricted movement, or localized wrinkles that may be caused by misalignment of the lining texture, achieving a perfect balance between crispness and flexibility.

[0042] Specifically, the industrial wavy stitching steps also include: Step 1: Sew wavy lines 1cm from the edge of the fourth layer of fabric, with a stitch length of 0.8cm ± 0.1mm and a stitch density of 8 stitches / 3cm; Step 2: Sew wavy lines along the connecting line between the second and fifth layers; Step 3: Sew wavy lines along the chest contour line to fix the first, second, third, and fourth layers.

[0043] Preferably, by breaking down the sewing process of an industrial wave-shaped stitching machine into three sub-steps with clear order and objectives, the mechanized and standardized reproduction of the traditional complex hand-stitched figure-eight effect is achieved. Utilizing the unique multi-dimensional tension and elasticity of the wave-shaped stitch, the cross stitches of the hand-stitched figure-eight are replaced, creating a flexible connection network between layers of lining that is both firmly fixed and allows for slight movement. This inside-out, local-to-overall sewing sequence ensures that the internal reinforcing structure is first stabilized, then gradually integrated with the core support layer, and finally with the outer layer, effectively avoiding interlayer displacement and suspension, making the entire chest lining a unified organic whole with balanced internal stress. While shaping the three-dimensional contour of the chest, the wave-shaped stitch itself acts like countless miniature springs, giving the chest lining a "breathing" feel that dynamically adapts to the body's breathing and movement, overcoming the stiffness and rigidity caused by straight stitches.

[0044] Specifically, in the first step, cut the shoulder seam 3cm from the neckline and cover it with charcoal lining fabric to create a 1-1.5cm shoulder pad.

[0045] Preferably, by making precise cuts at specific locations on the shoulder seam and covering them with high-elastic patches for fixation, this method creatively achieves the crucial "shoulder allowance" shaping in traditional haute couture processes during industrial production. It actively breaks the tension balance of the flat lining in the shoulder area, and the space released through the cuts is locked by the elastic patch and transformed into a stable, three-dimensional allowance with a height between 1 and 1.5 centimeters. This structural design allows the suit's shoulders to perfectly wrap around the acromion, filling the natural gaps at the shoulder point and creating a full, rounded, and naturally transitioned shoulder contour, completely avoiding the flatness and constriction often found in machine-made suits. Simultaneously, this shoulder allowance structure possesses a certain degree of dynamic adaptability, providing necessary allowance during arm movement, greatly improving wearing comfort and freedom of movement, and enhancing the durability of the shoulder seam.

[0046] Specifically, the machine-stitched shell process also includes: a special front chest positioning sewing machine is an improved needle-stitching machine with low-speed, high-torque output and a stitch length controlled between 0.8-1.2mm.

[0047] Preferably, a specially modified front-chest positioning sewing machine with low-speed, high-torque output and precise stitch control solves the problem that industrial equipment cannot simulate the subtle force and flexible stitching techniques of hand-stitching. This specialized machine can operate stably on curved surfaces, stitching with an extremely fine stitch pitch of 0.8 to 1.2 mm, accurately replicating the function of hand-stitched figure-eight stitches forming "memory anchor points" between the fabric and lining. The machine's high torque ensures that the needle can smoothly penetrate multiple layers of high-density lining without stalling or breaking, while the precise tension control system ensures that each stitch is appropriately tight, achieving a firm bond between the lining and the fabric while retaining necessary elasticity. Thus, with the efficiency of an assembly line, it successfully creates a high-end chest shape that is crisp yet not stiff, close-fitting yet not tight, and has a handcrafted feel.

[0048] Specifically, the machine-made chest mold process also includes: the curved chest mold platform is made of high-density solid wood with a polished surface, and its shape matches the contour of the human chest.

[0049] Preferably, by introducing an arc-shaped chest mold platform that perfectly matches the contours of the human chest as the supporting base for the machine's "shell-making" process, a precise curved surface reference is provided for the flat material during the three-dimensional shaping process. This solid wood-carved polished tabletop simulates the real human pectoral muscle curvature, shoulder line trend, and side waist dart angle, ensuring that the fabric and multiple layers of lining laid on it are already in a pre-set three-dimensional state before sewing. During sewing, the curvature of the tabletop naturally distributes the tension at various points of the seam, ensuring that the formed three-dimensional chest shape is evenly stressed and smoothly transitioned. This effectively avoids problems such as stiffness, internal stress concentration, or stitch distortion caused by forcibly shaping after sewing on a flat surface. It is the core carrier and quality guarantee for achieving the high-quality customized chest shape goal of "static crispness and dynamic fit."

[0050] Specifically, the shaping and pressing steps also include: after pressing, keeping the chest pad on the chest mold table for ventilation and cooling, avoiding repeated pressing of the same area, and avoiding hand-sewn seam nodes.

[0051] Preferably, a shaping process involving steam pressing and subsequent suction cooling on a curved chest mold platform matching the specified size achieves the final curing and long-term stability of the three-dimensional curvature of the full wool-lined chest lining. The thermal and hygroscopic effect of steam activates the macromolecular chains of natural wool, horsehair, and other fibers, reshaping them to a pre-set ideal three-dimensional curve under the support of the curved platform. Rapid suction cooling then quickly "sets" the fibers in their new form, thus permanently fixing the three-dimensional chest shape created during the sewing stage. This method avoids fiber rebound deformation caused by improper cooling, ensuring the durability of the chest lining's curvature. Simultaneously, the requirements for repeated pressing and avoiding seam joints prevent fiber embrittlement and stitch shrinkage, guaranteeing the intrinsic quality and service life of the chest lining.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines, characterized in that, include: Material pretreatment steps: Place the charcoal lining, horsehair lining, and horse tail lining into a constant temperature and humidity chamber for humidity balancing, and place the chest cotton into a steam pre-shrinking machine for pre-shrinking; Cutting steps: Use a CNC cutting machine to cut 9 pieces in 5 layers. The 5-layer structure includes a first layer of chest cotton piece, a second layer of black charcoal interfacing piece with folded seams, a third layer of horsehair interfacing piece, a fourth layer of partial reinforcement layer, and a fifth layer of black charcoal interfacing piece. The fourth layer of partial reinforcement layer includes two black charcoal interfacing patches for the shoulder opening, two black charcoal interfacing patches for the armhole, and a horsehair interfacing piece. Layer positioning steps: Lay the cut pieces in reverse order from the fifth layer to the first layer on the positioning and shaping table, align the center line and shoulder line, and temporarily fix them with positioning pins at intervals of 5cm ± 0.5cm; Industrial wave stitching steps: Using an industrial wave stitching machine, perform wave stitching in the order from the inside out and from the part to the whole, including sewing the fifth and fourth layers of appliqué, sewing the second and fifth layers, and sewing the first, second, third and fourth layers. Machine-stitched shell steps: Use a special front chest positioning sewing machine on the curved chest mold table to perform the front chest positioning stitching process to fix the fabric and lining. Shaping and pressing steps: Place the breast pad on the curved breast mold table, use a steam press machine to shape and press it, and then use suction air to cool and set the shape.

2. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The material pretreatment step further includes: The parameters of the constant temperature and humidity control chamber are set to temperature 25℃±1℃ and humidity 90%±2%, and left to stand for 24 hours to control the fiber moisture content at 12%-15%. The parameters of the steam pre-compressor are set as follows: temperature 60℃±2℃, steam pressure 0.2MPa, and processing time 5 minutes.

3. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The cutting step of the cut piece also includes: The first layer of the chest cotton panel is made of wool cotton with a weight of 120g / ㎡; The second layer of woven charcoal lining is made of high-density wool charcoal lining with a weight of 280g / ㎡; The third layer of horsehair lining is made of pure horsehair fiber with a weight of 320g / ㎡. The fourth layer of shoulder and armhole black charcoal lining patch is made of wool black charcoal lining with a weight of 180g / ㎡. The fourth layer of horsehair lining is made of hemp fiber and horsehair mixed in a weight ratio of 7:3, with a weight of 250g / ㎡. The fifth layer of charcoal lining is made of wool charcoal lining with a weight of 220g / m².

4. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The cutting step of the cut piece also includes: When cutting the garment pieces, the horsehair lining should be aligned with the vertical grain of the front piece of the suit along the direction of the horsehair growth, and the horsehair lining should be aligned with the shoulder line along the direction of the hemp fibers.

5. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The industrial wavy stitching process also includes: Step 1: Sew a wavy line 1cm from the edge of the fourth layer of appliqué, with a stitch length of 0.8cm ± 0.1mm and a stitch density of 8 stitches / 3cm; Step 2: Sew a wavy line along the junction of the second and fifth layers; Step 3: Sew wavy lines along the chest contour to secure the first, second, third, and fourth layers.

6. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 5, characterized in that, In the first step, cut the shoulder seam 3cm from the neckline and cover it with charcoal lining fabric to create a 1-1.5cm shoulder pad.

7. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The machine shell-burring step also includes: The dedicated front chest positioning sewing machine is an improved needle sewing machine with low-speed, high-torque output and a stitch length controlled between 0.8 and 1.2 mm.

8. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The machine shell-burring step also includes: The curved breast mold platform is made of high-density solid wood with a polished surface, and its shape matches the contour of the human breast.

9. The method for manufacturing a full-wool lining chest lining for men's suits suitable for assembly lines according to claim 1, characterized in that, The shaping and pressing step also includes: After pressing, keep the bust pad on the bust mold table to cool with suction, avoid repeatedly pressing the same area, and avoid hand-stitched joints.

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