Leather sheet handle and manufacturing process thereof
By improving the structural design and production process of leather handles of luggage, bags, and using the adhesive connection between filling slots and soft colloids, the traditional process is solved, which is labor-consuming, low output, high cost and unstable quality, and realizes automated production and efficient production.
Patent Information
- Application Number
- CN202510017439.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-04-11
AI Technical Summary
The production process of traditional leather leather handles is labor-intensive, with low output, high cost, unstable quality, and difficult to adapt to automated production.
By improving the structural design and production process of the handle, the adhesive connection between the filler slot and the soft colloid is adopted, and the leather tablet and the injection channel are combined to achieve the close connection between the leather tablet and the handle body and automated production.
It realizes a close connection between the leather sheet and the handle body, improves production efficiency, reduces costs, ensures product quality, and adapts to the needs of modern industrial production.
Smart Images
Figure CN119795477A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of bags, in particular to a leather handle and a manufacturing process thereof. Background Art
[0002] In the traditional manufacturing process of leather handles for luggage, the handle body and the soft rubber part are usually completed by injection molding. After the injection molding is completed, the leather piece is manually sewn to the handle body using needle and thread to form a complete leather handle. However, this traditional manufacturing process has many shortcomings:
[0003] Time-consuming and labor-intensive, low yield: Since manual sewing is required, this step is not only time-consuming but also requires a lot of manpower. Therefore, the traditional production process is greatly limited in output and cannot meet the needs of large-scale production.
[0004] High cost: Manual suturing not only requires paying workers’ wages, but also requires purchasing auxiliary materials such as needles and threads, which increases production costs. In addition, low production efficiency also leads to an increase in unit product costs.
[0005] Unstable quality: The quality of manual sewing is often affected by the workers' technical level and work experience, and it is easy to have problems such as too large gaps between the leather piece and the handle body, and broken needles and threads. This not only affects the appearance quality of the product, but also reduces the durability and service life of the product.
[0006] Difficult to adapt to automated production: Traditional production processes rely too much on manual operation and are difficult to achieve automated production. With the continuous development of industrialization, automated production has become a general trend. However, traditional production processes are difficult to adapt to this trend, limiting their application in modern industrial production. Summary of the invention
[0007] In order to solve the above problems, the present invention provides a leather handle and a manufacturing process thereof. The invention realizes the close connection and automated production of the leather sheet and the handle body by improving the structural design and manufacturing process of the handle, thereby improving production efficiency, reducing costs, ensuring product quality, and adapting to the needs of modern industrial production.
[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a leather handle, including a handle body and a leather sheet, a filling groove is opened on the surface of the handle body, the edge of the leather sheet is connected to the edge of the filling groove, and a filling cavity is formed between the leather sheet and the filling groove, the filling cavity is filled with a soft colloid, and the soft colloid is adhesively connected to the leather sheet and the filling groove.
[0009] Furthermore, a circle of leather pressing sheet is attached to the edge of the surface of the leather piece, wherein the outer side of the leather pressing sheet is clamped tightly with the inner side wall of the filling slot.
[0010] Furthermore, an injection channel communicating with the filling cavity is provided on one side of the handle body.
[0011] Furthermore, a step boss is provided at the edge of the filling slot, and the edge of the leather piece is pressed onto the step boss by a leather pressing sheet.
[0012] Furthermore, extension parts are formed on both sides of the handle body, and waist holes are opened in the extension parts, wherein the handle seat passes through the waist holes and is fixed to the bag.
[0013] Furthermore, the handle seat includes a seat body piece and a mounting column formed at the bottom of the seat body piece, and a clearance hole is also provided on the seat body piece, wherein the extension part passes through the clearance hole, and the mounting column passes through the waist hole and is fixed at the bag.
[0014] The present application also provides a process for manufacturing a leather handle, which specifically includes the following steps:
[0015] Step 1, first cut out a leather piece and put it into the mold to close the mold, and then injection mold a circle of leather pressing sheet on the surface of the leather piece; first cut out a leather piece that is one circle larger than the leather pressing sheet, put it into the mold, close the mold, and use the surrounding leather piece as the edge of the mold joint surface during injection molding. At the same time, set the injection molding machine temperature to 200℃ and the pressure to 50MPa, inject the molten plastic material into the mold, and the injection time is 10 seconds;
[0016] Step 2, after the injection molding is completed and cooled, the leather piece and the leather pressing sheet are bonded into a whole, and then the surrounding leather pieces are cut off along the edge of the leather pressing sheet to form a combination of the leather piece and the leather pressing sheet; cooling and solidification is to ensure that the leather pressing sheet is fully formed and forms a firm bond with the leather piece, laying the foundation for subsequent cutting and combination. Cutting off the excess leather pieces is to obtain a combination of leather pieces and leather pressing sheets with precise dimensions and neat appearance, while removing any burrs or uneven parts that may exist. After cutting, leather piece 2 is tightly bonded to the leather pressing sheet to form a whole, that is, a combination of leather pieces and leather pressing sheets. This combination will serve as an important component for the subsequent production of handles.
[0017] Step 3: Put the handle body, leather sheet and leather pressing sheet together in the mold, and the TPE soft colloid enters the filling cavity surrounded by the two from the injection channel. The molten TPE plastic at about 200 degrees is injected into the cavity with very high pressure. After injection, it is cooled to obtain the finished product.
[0018] Furthermore, in step 1, the plastic material is one or more of PE, PP, PVC, and PA.
[0019] The beneficial effects of the present invention are:
[0020] 1. The present invention fills the filling cavity with a soft colloid, and the soft colloid forms a sticky connection with the leather piece and the filling slot. This design realizes the tight wrapping of the leather piece and the soft colloid, without the need for manual sewing as in the traditional technology. At the same time, due to the tight sticky connection between the soft colloid, the leather piece and the filling slot, the connection fixation and durability of the two are significantly improved. This design not only enhances the overall structural strength of the handle, but also prolongs its service life.
[0021] 2. Due to the filling method, there is no empty gap between the soft colloid and the leather piece and the filling slot. This effectively avoids the problems of water seepage or bulging that may occur later, and improves the waterproof performance and durability of the handle.
[0022] 3. Compared with the traditional manual sewing method, the filling method adopted in the present invention is more suitable for automated production. By combining the leather sheet with the leather pressing sheet, placing the handle body and other components in the mold, and performing soft glue injection molding and filling, the leather sheet handle can be quickly produced. Automated production not only simplifies the operation process, but also significantly improves production efficiency. This enables the leather sheet handle of the present invention to be mass-produced to meet market demand, while also reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of a leather handle.
[0024] Figure 2 It is a structural diagram of the leather handle from another perspective.
[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of a leather handle.
[0026] Figure 4 It is a structural schematic diagram of the handle body.
[0027] Figure 5 It is a working diagram of steps 1-2 in the leather handle manufacturing process.
[0028] Explanation of the accompanying numbers: 1. Handle body; 11. Filling slot; 12. Extension; 121. Waist hole; 13. Injection channel; 2. Leather piece; 3. Leather pressing piece; 4. Handle seat; 41. Mounting column; 42. Clearance hole; 43. Seat piece; 5. Soft colloid. DETAILED DESCRIPTION
[0029] See also Figure 1-5As shown, the present invention relates to a handle made of a leather piece 2, comprising a handle body 1 and a leather piece 2. A filling slot 11 is provided on the surface of the handle body 1, an edge of the leather piece 2 is connected to an edge of the filling slot 11, and a filling cavity is formed between the leather piece 2 and the filling slot 11. The filling cavity is filled with a soft colloid 5, and the soft colloid 5 is adhesively connected to the leather piece 2 and the filling slot 11.
[0030] The present invention fills the filling cavity with a soft colloid 5, and forms a sticky connection between the soft colloid 5, the leather piece 2, and the filling slot 11. This design realizes the tight wrapping of the leather piece 2 and the soft colloid 5, without the need for manual stitching as in the traditional technology. At the same time, due to the tight sticky connection between the soft colloid 5, the leather piece 2, and the filling slot 11, the connection fixation and durability of the two are significantly improved. This design not only enhances the overall structural strength of the handle, but also prolongs its service life.
[0031] Due to the filling method, there is almost no extra gap space between the soft colloid 5 and the leather piece 2 and the filling slot 11. This effectively avoids the problems of water seepage or bulging that may occur later, and improves the waterproof performance and durability of the handle.
[0032] Compared with the traditional manual sewing method, the filling method adopted in the present invention is more suitable for automated production. By placing the leather piece 2, the handle body 1 and the soft colloid 5 in the mold and performing injection molding and filling, the leather piece handle can be quickly produced. Automated production not only simplifies the operation process, but also significantly improves production efficiency. This enables the leather piece 2 handle of the present invention to be mass-produced to meet market demand, while also reducing production costs.
[0033] As a further optimization solution, a circle of leather pressing sheet 3 is attached to the edge of the surface of the leather sheet 2, wherein the outer edge of the leather pressing sheet 3 is clamped with the inner wall of the filling slot 11. The addition of the leather pressing sheet 3 provides an additional fixing layer for the leather sheet 2, ensuring that the leather sheet 2 is more firmly attached to the filling slot 11 of the handle body 1. The clamping design of the outer edge of the leather pressing sheet 3 and the inner wall of the filling slot 11 increases the connection strength between the leather sheet 2 and the handle body 1, preventing the leather sheet 2 from loosening or falling off during use.
[0034] As a further optimization solution, an injection channel 13 connected to the filling cavity is provided on one side of the handle body 1. The provision of the injection channel 13 allows the soft colloid 5 to be directly injected into the filling cavity through the channel without disassembling or destroying other parts of the handle. This greatly simplifies the filling process, reduces the operating steps and required tools, and improves production efficiency. Through the injection channel 13, the injection amount of the soft colloid 5 can be more accurately controlled to ensure that the filling cavity is completely and evenly filled. This avoids quality problems caused by excessive or insufficient filling, such as colloid overflow, uneven filling, or poor feel. This improves the quality and consistency of the colloid in the filling cavity and ensures the comfort and durability of the handle.
[0035] Furthermore, a stepped boss 111 is provided at the edge of the filling slot 11, and the edge of the leather piece 2 is pressed against the stepped boss 111 by the leather pressing piece 3. Due to the presence of the stepped boss 111, the leather pressing piece 3 can more effectively press the edge of the leather piece 2, thereby achieving a more secure connection, thereby preventing the leather piece 2 from loosening when the soft colloid 5 is subsequently injected.
[0036] As a further optimization solution, an extension 12 is formed on both sides of the handle body 1, and a waist hole 121 is opened in the extension 12, wherein the handle seat 4 passes through the waist hole 121 and is fixed to the luggage. As a further optimization solution, the handle seat 4 includes a seat body piece 43 and a fitting column 41 formed at the bottom of the seat body piece 43, wherein the seat body piece 43 is also provided with a clearance hole 42, wherein the extension 12 passes through the clearance hole 42, and the fitting column 41 passes through the waist hole 121 and is fixed to the luggage. In this embodiment, the extension 12 is added to both sides of the handle body 1 to provide space for subsequent fixation and deformation. The design of the waist hole 121 allows the handle body 1 to have a certain lifting space when the leather piece 2 is lifted after being fixed to the luggage.
[0037] The following specifically discusses a process for making a leather handle, which includes the following steps:
[0038] Step 1, first cut out a leather piece 2 and put it into the mold to close the mold, and then injection mold a circle of leather pressing sheet 3 on the surface of the leather piece 2; specifically: first cut out a leather piece 2 that is one circle larger than the leather pressing sheet 3, put it into the mold, close the mold, and use the leather piece 2 around the circle as the edge of the mold joint surface during injection molding. At the same time, set the injection molding machine temperature to 200°C and the pressure to 50MPa, inject the molten plastic material into the mold, and the injection molding time is 10 seconds;
[0039] The slightly larger leather piece 2 is cut out so that the edge of the leather piece 2 can be used as a pressing edge of the mold joint surface in the subsequent injection molding process to ensure that the material does not overflow during injection molding.
[0040] Step 2, after the injection molding is completed and cooled, the leather piece 2 and the leather pressing piece 3 are bonded into a whole, and then the peripheral leather piece 2 is cut off along the edge of the leather pressing piece to form a combination of the leather piece 2 and the leather pressing piece 3; cooling and solidification is to ensure that the leather pressing piece 3 is fully formed and forms a firm bond with the leather piece 2, laying the foundation for subsequent cutting and combination. Cutting off the excess leather piece 2 is to obtain a combination of the leather piece 2 and the leather pressing piece 3 with precise size and neat appearance, and at the same time remove possible burrs or uneven parts. This combination will serve as an important component for the subsequent production of handles.
[0041] Step 3, put the handle body 1, leather sheet 2 and leather pressing sheet 3 together in the mold, and the TPE soft colloid 5 enters the filling cavity surrounded by the two from the injection channel 13. The molten TPE plastic at about 200 degrees is injected into the cavity with very high pressure. After injection, it is cooled to obtain the finished product. The flexibility and elasticity of the TPE soft colloid 5 are used to fill the gap between the handle body 1 and the leather, and at the same time, the TPE is bonded to the leather sheet 2 and the TPE to the surface of the handle body 1. At the same time, the flexibility and elasticity of the TPE soft colloid 5 provide the handle with a good touch and grip comfort, improving the user experience. In addition, the filling of soft colloids 5 such as TPE can also play a role in waterproofing and dustproofing, protecting the internal structure and materials of the handle from erosion by the external environment. The automated filling and bonding process reduces manual intervention and waiting time, improves production efficiency, and reduces production costs.
[0042] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.
Claims
1. A leather handle, characterized in that: The handle body comprises a carrying handle and a leather piece. A filling slot is provided on the surface of the carrying handle body. The edge of the leather piece is connected to the edge of the filling slot. A filling cavity is formed between the leather piece and the filling slot. The filling cavity is filled with a soft colloid. The soft colloid is adhesively connected to the leather piece and the filling slot.
2. The leather handle according to claim 1, characterized in that: A circle of leather pressing sheet is attached to the edge of the surface of the leather sheet, wherein the outer side of the leather pressing sheet is clamped tightly with the inner side wall of the filling slot.
3. The leather handle according to claim 1, characterized in that: An injection channel communicating with the filling cavity is arranged on one side of the handle body.
4. The leather handle according to claim 2, characterized in that: A step boss is arranged at the edge of the filling slot, and the edge of the leather piece is pressed onto the step boss by a leather pressing sheet.
5. The leather handle according to claim 1, characterized in that: Extension parts are formed on both sides of the handle body, and waist holes are opened in the extension parts, wherein the handle seat passes through the waist holes and is fixed on the bag.
6. The leather handle according to claim 5, characterized in that: The handle seat comprises a seat body piece and a fitting column formed at the bottom of the seat body piece. The seat body piece is also provided with a clearance hole, wherein the extension part passes through the clearance hole, and the fitting column passes through the waist hole and is fixed at the bag.
7. A process for manufacturing a leather handle, characterized in that: Step 1, cutting out a leather piece and putting it into a mold to close the mold, and injection molding a circle of leather pressing sheet on the surface of the leather piece, and after the injection molding is completed and cooled, the leather piece and the leather pressing sheet are bonded into a whole; Step 2, cutting off the peripheral leather pieces along the edge of the leather pressing sheet to form a combination of the leather piece and the leather pressing sheet; Step 3, placing the leather piece and the leather pressed piece as a combination together with the handle body that has been injection molded in advance in a mold, injecting a soft colloid into the filling cavity surrounded by the two, demolding, cooling, and obtaining a finished product.
8. The process for making a leather handle according to claim 7, characterized in that: The specific steps of step 1 are: use a cutting machine to cut the leather piece into the required size, including the part combined with the leather pressing sheet and the part of the edge pressing around the leather pressing sheet, preheat the mold to 50°C, and then put the cut leather piece into the mold, set the injection molding machine temperature to 200°C and the pressure to 50MPa, inject the molten plastic material into the mold, and the injection time is 10 seconds; after the injection molding is completed, cool the mold to room temperature.
9. The manufacturing process of a leather handle according to claim 8, characterized in that: In step 1, the plastic material is one or more of PE, PP, PVC, and PA.
10. The manufacturing process of a leather handle according to claim 7, characterized in that: The specific steps of step 3 are to place the leather sheet, the leather pressed sheet and the handle body that has been injection molded in advance in the mold, set the injection molding temperature of the injection molding machine to 200°C and the pressure to 60MPa, and inject the molten TPE soft colloid from the preset injection channel in the handle body into the filling cavity surrounded by the two. The injection time is 15 seconds. After the injection molding is completed, the mold is cooled to room temperature and the finished product is taken out.