Method for manufacturing folding three-dimensional hard box without glue

Abstract

The invention discloses a method for manufacturing a folding three-dimensional hard box without glue, which can realize stable manufacturing of the three-dimensional hard box without glue, simplifies the manufacturing process, reduces the production cost, avoids the use of glue or high-temperature mould pressing process, eliminates the release of chemical substances and irritant peculiar smell, and is more environment-friendly and healthy. Besides, all parts of the hard box can be firmly connected together through a specific sewing mode, so that the structural stability and the service life of the hard box are ensured; according to the invention, the fabric and the hard board are connected by only adopting a needle and thread sewing process, and toxic substances caused by traditional glue type bonding connection are not generated or volatilized, so that the health and safety of a user are guaranteed, the production and manufacturing cost is reduced, and the production efficiency is improved at the same time; the box body is high in structural strength, firm and three-dimensional as a whole, and can effectively protect articles stored in the box body; each corner of the box body is designed to be a right-angle corner, and compared with a rounded corner, the form space utilization rate is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of storage bags, and in particular to a method for manufacturing a foldable three-dimensional hard box without glue. Background Art

[0002] In this era of material abundance, we have not only objects, but also a diversity of life scenes. From office commuting, home travel, sports and fitness, etc., there are corresponding different types of items, such as important items such as documents, seals, stationery, electronic equipment, and other small items such as personal beauty products. They all require exclusive storage space. Not only do they need to be portable and practical, but the requirements for appearance are also constantly improving, especially three-dimensional handbags and luggage, which are simple, stylish, and high-end, and can better protect the stored items, but they are often trapped in the compromise between traditional storage and appearance.

[0003] In the prior art, the manufacturing process of three-dimensional bags is generally through gluing, EVA or plastic molding. Gluing is to apply glue to the fabric and shape frame of the bag respectively and then glue the edges to construct a three-dimensional bag body, and then connect the bag cover with a zipper at the opening of the bag body to form a complete storage bag. EVA or plastic molding is both through high-temperature hot pressing. After the EVA or plastic is softened at high temperature, it is pressed into shape in the corresponding mold, and various bag bodies are connected by zippers at the upper and lower box openings. Due to the limitations of the forming depth and the elastic stretching of the fabric, deformation is easy to occur, making the overall appearance of the bag not beautiful. In addition, the three-dimensional bags made by gluing and EVA or plastic high-temperature molding will also release chemicals with irritating odors, which will not only pollute the environment but also cause harm to human health. Therefore, there is an urgent need for a three-dimensional bag with a more reasonable manufacturing process to solve the above-mentioned problems. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned technology that the production process of the three-dimensional package will produce chemical substances with irritating odor, which will not only pollute the environment but also cause harm to human health, and the box structure is not three-dimensional and strong enough, the present invention provides a method for producing a foldable three-dimensional hard box without glue.

[0005] To achieve the above object, the present invention provides a method for making a foldable three-dimensional rigid box without glue, comprising the following steps: S1. Obtain a cross-shaped hard plate, outer fabric, and inner fabric; S2, forming a bottom plate and wall panels connected by folds on the molded hard plate; S3, placing the formed hard plate between the outer fabric and the inner fabric, and sequentially sewing the outer fabric, the formed hard plate, and the inner fabric together using sutures; S4. Folding the wall panels relative to the bottom panel according to the creases, and then sew and fix adjacent wall panels together to enclose the adjacent wall panels to form the foldable three-dimensional hard box.

[0006] As an improved solution of the present invention, in S3, the step of sewing the outer fabric, the formed hard plate and the inner fabric together includes: a. The edge of the bottom plate and the outer fabric and the inner fabric are sewn to form a first connecting line, so that the bottom plate and the outer fabric and the inner fabric are fixedly connected; b. The edges of the outer fabric and the inner fabric are aligned with the edge of the wall panel away from the bottom plate and sewn to form a second connection line, and the wall panel is fixedly connected to the outer fabric and the inner fabric.

[0007] As an improved solution of the present invention, in S4, the step of sewing and fixing adjacent wall panels to each other includes: c. The outer layer of fabric and the inner layer of fabric that are not covered by the bottom plate and the wall plate form a corner portion; d. Folding the corner portion to the inner wall surface of any adjacent wall panel; e. The edge of the angled portion is sewn to the edge of the inner wall surface of any adjacent wall panel so that the adjacent wall panels are fixed to each other at a desired angle.

[0008] As an improved solution of the present invention, the molded hard plate is made of hard material, and the outer layer fabric and the inner layer fabric are both made of soft material.

[0009] As an improved solution of the present invention, the suturing connection method includes sewing, hand sewing and machine sewing.

[0010] As an improved solution of the present invention, the expected angle includes 0-180 degrees.

[0011] As an improved solution of the present invention, in step e, the corner portions are in a tensioned state when being folded and sewn, so that adjacent wall panels are tightly fitted and fixed.

[0012] As an improved solution of the present invention, an upper box body and a lower box body are manufactured according to steps S1-S4, and a handle or a shoulder strap is sewn and fixed to the outer wall surface of the upper box body or the lower box body.

[0013] As an improved solution of the present invention, a zipper is provided at the connection between the upper box body and the lower box body, and a lock buckle or password lock device is provided to lock the zipper when the upper box body and the lower box body are closed.

[0014] It also includes a folding three-dimensional hard box made according to the method for making a folding three-dimensional hard box without glue, and the hard box is a storage box, a tool box, a jewelry box or a packaging box.

[0015] The beneficial effects of the present invention are: compared with the prior art, the method for making a foldable three-dimensional hard box without glue provided by the present invention can achieve stable production of the three-dimensional hard box without using glue, thus simplifying the production process and reducing production costs. The method avoids the use of glue or high-temperature molding process, eliminates the release of chemical substances and irritating odor, and is more environmentally friendly and healthy; in addition, through a specific sewing method, the various parts of the hard box can be firmly connected together, ensuring the structural stability and service life of the hard box; the present invention only uses needle and thread sewing technology to connect the fabric and the hard board, and will not produce or volatilize toxic substances caused by traditional glue-type adhesive connections, which not only protects the health and safety of users, but also reduces production costs and improves production efficiency; the box body has high structural strength, and the overall structure is both strong and three-dimensional, which can effectively protect the items stored inside; the various corners of the box body are designed to be right-angled corners, which have a higher morphological space utilization rate than rounded corners. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the method of the present invention; Figure 2 is a first stereogram of the present invention; Figure 3 is a second perspective view of the present invention; Figure 4 This is a schematic diagram of the first box body of the present invention being expanded; Figure 5 An exploded view of the box body of the present invention; Figure 6 This is an expanded view of the second box body of the present invention; Figure 7 This is an expanded view of the third box body of the present invention.

[0017] The main component symbols are described as follows: 1. Lower box body; 2. Upper box body; 3. Molded hard board; 31. Bottom plate; 32. Wall panel; 4. Outer fabric; 5. Inner fabric; 6. Crease; 7. Elastic handle; 71. Elastic buckle; 8. Combination lock; 9. Corner; 10. First connecting line; 11. Second connecting line. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0019] In the following description, example details are provided to provide a deeper understanding of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0020] It should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the stated features, integers, steps, operations, elements or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0021] See also Figure 1-Figure 7 The present invention provides a method for manufacturing a foldable three-dimensional hard box without glue, comprising the following steps: S1, obtain a cross-shaped hard plate 3, an outer layer fabric 4 and an inner layer fabric 5; S2, forming a bottom plate 31 and wall panels 32 connected by folds on the molded hard plate 3; S3, placing the formed hard plate 3 between the outer fabric 4 and the inner fabric 5, and sequentially sewing the outer fabric 4, the formed hard plate 3 and the inner fabric 5 together by stitching; S4. Fold the wall panels 32 relative to the bottom panel 31 according to the crease 6, and then sew and fix the adjacent wall panels 32 to enclose the adjacent wall panels 32 to form the foldable three-dimensional hard box.

[0022] Among them, the present invention obtains a cross-shaped molded hard board 3 and uses the molded hard board 3 as the substrate of the box structure, which plays the role of the box body skeleton and is the three-dimensional firm foundation of the three-dimensional hard box. Therefore, the molded hard board 3 needs to be made of hard material, and the outer fabric 4 and the inner fabric 5 are used as fabrics wrapped around the outside of the molded hard board 3. The three are sewn together by sewing and other processes. The cross-shaped structure of the molded hard board 3 is divided into a bottom plate 31 and a wall panel 32 connected to the bottom plate 31 by a fold 6. The bottom plate 31 serves as the center of the cross-shaped structure, and the wall panels 32 connected by the fold 6 extend along its four edges. The fold 6 between the bottom plate 31 and the wall panel 32 is obtained by a half-cutting process. The initial molded hard board 3 is a complete cross-shaped plate. After determining the size parameters of the bottom plate 31 and the wall panel 32, the half-cutting process is used to ensure that the plate will not be completely cut to form the fold 6, so that the formed plate is The molded hard board is divided into a bottom plate 31 and a foldable wall panel 32; after the two sides of the molded hard board 3 are sewn to the outer fabric 4 and the inner fabric 5 respectively, the wall panel 32 is folded relative to the bottom plate 31 according to the crease 6, and then the adjacent wall panels 32 are fixed by sewing. Each wall panel 32 is enclosed to form a box structure with an open side, and then the upper box body 2 and the lower box body 1 are manufactured through steps S1-S4. The upper box body 2 and the lower box body 1 can be fixedly connected by zippers, sutures, etc. to form a complete foldable three-dimensional hard box; compared with the high-temperature molding process in the prior art, the foldable three-dimensional hard box manufactured by the present invention does not produce or volatilize the toxic odor unique to glue, and is more environmentally friendly and safe. Moreover, since the box body is folded only by needle and thread sewing, the production cost is low, with good economic benefits, and fast and efficient processing and production can also be achieved.

[0023] In this embodiment, in S3, the step of sewing the outer fabric 4, the formed hard plate 3 and the inner fabric 5 together includes: a. The edge of the bottom plate 31 is sewn with the inner fabric 5 to form a first connecting line 10, so that the bottom plate 31 is fixedly connected to the inner fabric 5; b. The edges of the outer fabric 4 and the inner fabric 5 are aligned with the edge of the wall panel 32 away from the bottom plate 31 and fixedly connected to form a second connecting line 11, and the wall panel 32 is fixedly connected to the outer fabric 4 and the inner fabric 5.

[0024] The first connection line 10 is formed when the inner fabric 5 is fixed to the edge of the bottom plate 31 and the inner fabric 5 is shaped, which can effectively prevent the fabric from forming wrinkles and protrusions, and keep the various wall surfaces inside the box body as flat horizontal surfaces. The stitching of the box body is hidden in the edge of the bottom plate and the edge of the folded corner. The overall appearance of the box body will not show traces of stitching, which improves the aesthetics of the box body. Furthermore, the fixed connection method between the inner fabric 5 and the bottom plate 31 mainly includes stitching connection, voltage connection or ultrasonic connection, among which the stitching connection is to tightly sew the inner fabric 5 and the edge of the bottom plate 31 together with needle and thread. Together, it can be sewn, manually sewn, or machine sewn. The sewing method is simple, reliable, and low-cost, which is suitable for the needs of most manufacturers; voltage connection is to melt the edge of the inner fabric 5 and the bottom plate 31 together through high-frequency voltage. This method has high connection strength, good sealing, and does not require additional sewing materials, and has high production efficiency; ultrasonic connection uses the energy generated by ultrasonic vibration to melt and combine the edges of the inner fabric 5 and the bottom plate 31 at the contact surface. Ultrasonic connection also has the advantages of high connection strength and good sealing, and is simple and quick to operate. It does not require any glue or adhesive and is more environmentally friendly. According to specific production needs and conditions, a suitable fixed connection method can be selected to ensure a firm connection between the inner fabric 5 and the bottom plate 31, thereby maintaining the flatness and stability of the internal structure of the box body and improving the overall quality and durability of the storage bag.

[0025] In this embodiment, in S4, the step of sewing and fixing adjacent wall panels 32 to each other includes: c. The outer layer fabric 4 and the inner layer fabric 5 are not covered by the bottom plate 31 and the wall plate 32 to form a corner portion 9; d. The corner portion 9 is folded to the inner wall surface of any adjacent wall panel 32; e. The edge of the angled portion 9 is sewn to the inner wall edge of any adjacent wall panel 32 so that the adjacent wall panels 32 are fixed to each other at a desired angle.

[0026] See also Figure 2-3The upper box body 2 and the lower box body 1 are mainly formed by folding the cross-shaped structure of the formed hard board 3. The bottom plate 31 serves as the bottom of the box body, and the wall panel 32 is folded relative to the bottom plate 31 through the crease 6 to form the various wall surfaces of the box body, and the parts of the outer fabric 4 and the inner fabric 5 not covered by the formed hard board 3 form a folded corner portion 9, and the folded corner portion 9 is sewn to the inner wall edge of the adjacent wall panel 32, so that the folded corner portion 9 is fixed to each wall panel 32, so that the adjacent wall panels 32 are fixed to each other at the expected angle, and finally the upper box body 2 or the lower box body 1 is formed, wherein the expected angle may include a 90° right angle and other angles between 0-180°. The expected angle is set to a 90° right angle so that the adjacent wall panels remain perpendicular to each other. , the corners of the upper box body 2 and the lower box body 1 folded in this way are all right angles, rather than the rounded corners formed by the traditional box body. The box body structure of the present invention improves the space utilization of the box body compared to the traditional box body structure. At the same time, the box body is sewn to the edge of the adjacent wall panel 32 through the edge of the corner portion 9. By pulling the corner portion 9 tightly and then sewing it, the wall panels 32 are fixed more tightly, and the structure of the box body is stronger and more reliable. Furthermore, in step e, the corner portion 9 is in a tensioned state when it is folded and sewn, so that the adjacent wall panels 32 are tightly fitted and fixed. When the corner portion 9 is folded to the inner wall surface of the adjacent wall panel, the corner portion 9 needs to be pulled inward to make it completely flattened and tightened. At this time, the fabric of the corner portion 9 is in a stretched state. In this state, the edge of the corner portion 9 is fixed to the edge of the inner wall of the wall panel 32 by sewing. After sewing, the rebound force of the corner portion 9 continues to apply outward pulling force, forcing the two adjacent wall panels 32 to fit tightly at a preset angle, eliminating gaps and enhancing the structural stability of the corners of the box body.

[0027] In this embodiment, the formed hard board 3 is a hard material, and the outer fabric 4 and the inner fabric 5 are soft materials. The formed hard board 3 is a hard material, which makes the formed hard board 3 have good support and stability, and can withstand a certain weight and pressure. Specifically, hard boards such as cardboard, PP board, plastic board, fiberglass board, composite board and even foldable, bent and sewn metal plates can be used. The outer fabric 4 and the inner fabric 5 have soft properties, and their materials can be skin-friendly materials, such as polyester and nylon in synthetic fiber fabrics, genuine leather and tree tanned leather in leather, cotton canvas and jute canvas in canvas, silk or bamboo fiber and other luggage fabrics of different materials. The above fabrics are not only water-repellent on the surface and soft to the touch, but also can effectively absorb moisture and perspiration, and provide a comfortable feel and touch, while also enhancing the convenience and comfort of use, while taking into account the user's experience.

[0028] In this embodiment, the methods of sewing connection include sewing, hand sewing or machine sewing to ensure a firm connection between the components. The sewing method is usually performed using a sewing machine to tightly sew the fabric and the edges of the wall panel 32 together through continuous stitches. This method is efficient and the sewing lines are uniform and beautiful; hand sewing is suitable for small batches or customized products, and can provide more refined sewing effects and personalized decorative details; machine sewing can pre-design the same operating method as steps S1-S4, and then uniformly set various parameters to automatically produce glue-free folding three-dimensional hard boxes; in actual operation, the most suitable sewing connection method is selected according to the design requirements and production scale of the hard box to ensure the quality and stability of the final product.

[0029] In this embodiment, the upper box body 2 and the lower box body 1 are manufactured according to steps S1-S4, and a handle or shoulder strap is sewn and fixed on the outer wall of the upper box body 2 or the lower box body 1. The handle and shoulder strap are important accessories to enhance the portability of the hard case. The material thereof can be soft and durable leather, nylon or canvas, etc. These materials are not only light but also provide a comfortable grip. When sewing, it is necessary to ensure that the fixed position of the handle or shoulder strap is accurate and the stitches are firm to prevent loosening or falling off during use; wherein, an elastic handle 7 is further provided on the top surface of the upper box body 2, and the elastic handle 7 is attached to the surface of the upper box body 2, and a space for fingers to pass through is formed between the elastic handle 7 and the upper box body 2, and the elastic handle 7 When carrying or moving the storage box, the user can easily lift the storage box by passing his fingers through the space formed between the elastic carrying strap 7 and the upper box body 2, which increases the convenience of use. The elastic carrying strap 7 fits the surface of the upper box body 2, which is not only beautiful but also ensures that it is not easy to slip during carrying, thereby improving the safety of use. Furthermore, an elastic buckle 71 is provided on the elastic carrying strap 7, and the elastic buckle 71 enables the elastic carrying strap 7 to be more conveniently fixed in the desired position when in use, which not only enhances the stability of the carrying strap, but also improves the user's experience of use. The user can lift the box body through the elastic buckle 71, and can also hang it on any place with a hook through the elastic buckle 71, which is both practical and convenient.

[0030] As an improvement to the present invention, a zipper is provided at the connection between the upper box body 2 and the lower box body 1, and a lock buckle or password lock 8 device is provided to lock the zipper when the upper box body 2 and the lower box body 1 are closed; the zipper can facilitate the user's opening and closing operations on the hard box, and no additional pasting or fastening steps are required, and the box body can be opened and closed by simply pulling the zipper; in addition, in order to enhance the security of the hard box, the zipper slider is locked by providing a lock buckle or password lock 8 device, and the lock buckle device can quickly lock the zipper to prevent the items in the box from accidentally falling or being stolen; and the password lock 8 device provides higher security, and the user can set a personal password. The box body can only be opened after the password is entered correctly. It is suitable for storing valuables or documents that need to be kept confidential.

[0031] The invention also discloses a foldable three-dimensional hard box made according to a method for making a foldable three-dimensional hard box without glue. The hard box is a storage box, a tool box, a jewelry box or a packaging box.

[0032] The advantages of the present invention are: 1. The present invention adopts a three-layer material sewn and folded three-dimensional structure design, which does not require traditional molding or gluing to make a three-dimensional storage box or storage bag, and can achieve the same three-dimensional luggage effect, providing a new structural design for three-dimensional handbags and luggage. This structural design can improve the appearance of handbags and luggage, and is three-dimensional and stiff, flat and wrinkle-free. The inner hard board support not only shapes the bag but also better protects the items in the bag. The overall structural strength of the three-dimensional bag is improved. At the same time, it will not produce or volatilize toxic substances to damage the environment, eliminates the generation of irritating odors, and improves environmental protection.

[0033] 2. The three-layer material foldable three-dimensional structure can be folded into right angles or various angles within 180 degrees through sewing at different angles to form various three-dimensional package shapes, directly eliminating the process of mold opening or gluing and forming, which has significant advantages in production costs and further improves production efficiency.

[0034] The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A method for making a foldable three-dimensional hard box without glue, characterized in that: The following steps are involved: S1. Obtain a cross-shaped hard plate, outer fabric, and inner fabric; S2, forming a bottom plate and wall panels connected by folds on the molded hard plate; S3, placing the formed hard plate between the outer fabric and the inner fabric, and sequentially sewing the outer fabric, the formed hard plate, and the inner fabric together using sutures; S4. Folding the wall panels relative to the bottom panel according to the creases, and then sew and fix adjacent wall panels together to enclose the adjacent wall panels to form the foldable three-dimensional hard box.

2. The method for making a foldable three-dimensional hard box without glue according to claim 1, characterized in that: In S3, the step of sewing the outer fabric, the formed hard plate and the inner fabric together comprises: a. The edge of the bottom plate is connected to the inner fabric to form a first connecting line, so that the bottom plate and the inner fabric are fixedly connected; b. The edges of the outer fabric and the inner fabric are aligned with the edge of the wall panel away from the bottom plate and connected to form a second connection line, and the wall panel is fixedly connected to the outer fabric and the inner fabric.

3. The method for making a foldable three-dimensional hard box without glue according to claim 1, characterized in that: In S4, the step of sewing and fixing the adjacent wall panels to each other includes: c. The outer layer of fabric and the inner layer of fabric that are not covered by the bottom plate and the wall plate form a corner portion; d. Folding the corner portion to the inner wall surface of any adjacent wall panel; e. The edge of the angled portion is sewn to the edge of the inner wall surface of any adjacent wall panel so that the adjacent wall panels are fixed to each other at a desired angle.

4. The method for making a foldable three-dimensional hard box without glue according to claim 1, characterized in that: The molded hard plate is made of hard material, and the outer layer fabric and the inner layer fabric are both made of soft material.

5. The method for making a foldable three-dimensional hard box without glue according to claim 1, characterized in that: The sewing connection method includes sewing, hand sewing and machine sewing.

6. The method for making a foldable three-dimensional hard box without glue according to claim 1, characterized in that: The expected angle includes 0-180 degrees.

7. The method for making a foldable three-dimensional hard box without glue according to claim 3, characterized in that: In step e, the corner portions are folded and sewn in a tensioned state so that adjacent wall panels are tightly fitted and fixed.

8. The method for making a foldable three-dimensional hard box without glue according to claim 1, characterized in that: According to steps S1-S4, an upper box body and a lower box body are manufactured, and a handle or a shoulder strap is sewn and fixed on the outer wall surface of the upper box body or the lower box body.

9. The method for making a foldable three-dimensional hard box without glue according to claim 8, characterized in that: A zipper is provided at the connection between the upper box body and the lower box body, and a lock buckle or a password lock device is provided to lock the zipper when the upper box body and the lower box body are closed.

10. The foldable three-dimensional rigid box made by the method according to any one of claims 1 to 9, characterized in that: The hard box is a storage box, a tool box, a jewelry box or a packaging box.

Images