A spray forming production process for gloves

Abstract

The application relates to a spray forming production process of gloves, belonging to the field of glove production, which sequentially comprises coating and equipment preparation, coating modulation, spraying and shaping, according to the performance requirements of the gloves, different coating proportioning and spraying area division can be carried out; after spraying, pressure treatment, post-treatment and post-finishing process treatment can be selectively carried out according to the design requirements of the gloves. The process has the advantages of simple process, simple operation, high efficiency and the like.

Description

Technical Field

[0001] This application relates to the field of glove manufacturing, and more particularly to a spray molding process for producing gloves. Background Technology

[0002] Gloves are used to keep hands warm, for decoration, or for labor protection. Gloves are usually made of various leathers, rubbers, knitted or woven fabrics. The performance of gloves generally requires them to be durable, elastic, and comfortable to wear. Depending on the usage scenario, some gloves may also need to have insulation, cut resistance, and other characteristics.

[0003] Traditional glove production involves a variety of complex processes and procedures, and requires relatively high precision, which ultimately results in low glove production efficiency. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a spray molding process for producing gloves.

[0005] The application provides a glove spray molding production process using the following technical solution: A spray molding process for producing gloves includes the following steps: S1: Material and Equipment Preparation: Equipment includes hand molds and spraying devices, and materials include paint for making gloves; S2: Prepare the paint to the state ready for spraying; S3: Paint spraying: Use a spraying device to spray paint onto the hand mold, so that the paint adheres to the surface of the hand mold; S4: Shaping: After the paint solidifies on the hand mold, it is shaped into a glove. The shaped glove is then removed from the hand mold.

[0006] By adopting the above technical solution, the coating is sprayed onto the surface of the hand mold. After solidification and shaping, the coating takes on the three-dimensional shape of the hand mold, and the glove is completed. This greatly simplifies the types of processes, procedures, and equipment requirements in the glove making process. The new process is simple in glove forming, has a short production cycle, and high production efficiency.

[0007] Preferably, the coating in S1 comprises: filamentous fibers of hot-melt polymers and / or hot-melt adhesives and / or solutions and / or hot-melt microparticles and / or suspensions and / or emulsions.

[0008] Preferably, during the spraying process in S3, one or more materials are selectively sprayed onto the target area of ​​the hand mold.

[0009] By adopting the above technical solutions, materials that can be three-dimensionally molded by spraying and solidification can be used as raw materials for gloves, according to the design requirements of glove products. The combination of different raw materials can also enable gloves to have more functions and appearance characteristics.

[0010] Preferably, in step S3, before spraying the coating onto the surface of the hand mold, a release agent is first applied to the surface of the hand mold.

[0011] By adopting the above technical solution, the release agent is used to reduce the adhesion of the coating to the surface of the hand mold during the molding process, thereby improving the smoothness of removing the molded gloves from the hand mold.

[0012] Preferably, the device in step S1 further includes a baffle, which is movably connected to the hand mold, and during spraying, the baffle abuts against the surface of the hand mold; step S3 includes the following steps in sequence: S31: Press the baffle against one or more sides of the hand mold; S32: Apply coating to the surface of the glove using a spraying device; S33: After the gloves are shaped, separate the baffle from the gloves.

[0013] By adopting the above technical solution, the baffle is selectively set according to the appearance design requirements of the glove. The part of the hand mold covered by the baffle will not be coated. When the baffle is separated from the glove, the coating on the hand mold and the coating on the baffle are also separated at the same time. The edge contour of the coating on the hand mold is the contour of the baffle. As a result, the appearance contour of the final glove product is more accurate and regular.

[0014] Preferably, step S3 further includes pressure treatment, and the device further includes a pressure mold, which is movably connected to the hand mold. After the paint is sprayed onto the hand mold, the pressure mold moves towards the hand mold and abuts against the surface of the paint on the hand mold.

[0015] By employing the above technical solutions, for fluid-based coatings, such as hot melt adhesives and solutions, pressure treatment is performed while the coating is still plastic during the solidification process on the mold. This allows the coating surface to acquire a texture or roughness corresponding to the mold surface, achieving the desired design requirements. For fibrous or filamentous coatings, the mold and hand mold work together to compress the coating during pressure treatment, increasing the density of the coating on the mold surface and thus improving the final glove product's density, structural strength, and structural stability.

[0016] Preferably, between S3 and S4, there is also a post-processing of the gloves, including: heat drying, cooling, and natural drying.

[0017] By adopting the above technical solution, the post-processing aims to improve the setting speed of the coating on the hand mold surface and increase production efficiency.

[0018] Preferably, S4 further includes a post-processing step.

[0019] By adopting the above technical solution, the post-processing technology is used to change the physicochemical properties of the coating surface, so that the final molded gloves meet the design standards.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By spraying paint onto the hand mold, the process of glove making is greatly simplified in terms of the types of processes, procedures, and equipment requirements. The new process makes the glove forming process simple, the production cycle is short, and the production efficiency is high. 2. By setting up baffles, areas on the hand mold that do not need to be painted are covered, so that paint will not remain in the covered areas during painting. The baffles can be adapted to different glove designs, increasing product diversity with almost no impact on the overall process. Attached Figure Description

[0021] Figure 1 This is a process flow diagram illustrating the spray molding production process of gloves in the embodiments of this application.

[0022] Figure 2 This is a schematic diagram of the overall structure of the mold used in the embodiments of this application to illustrate that the coating is a filamentous fiber of a hot-melt polymer.

[0023] Figure 3 This is a cross-sectional view of the structure used in the embodiments of this application to illustrate the working principle of the compression mold.

[0024] Explanation of reference numerals in the attached drawings: 1. Hand mold; 2. Press mold; 21. Finger seam module; 22. Matching protrusion; 23. Abutting template; 231. Cavity groove; 24. Airflow channel; 241. Air hole. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0026] This application discloses a spray molding manufacturing process for gloves, such as... Figure 1 As shown, the steps are as follows: S1: Material and Equipment Preparation: Equipment includes hand molds and spraying devices, and materials include paint for making gloves; S2: Prepare the paint to the state ready for spraying; S3: Paint spraying: Use a spraying device to spray paint onto the hand mold, so that the paint adheres to the surface of the hand mold; S4: Shaping: After the paint solidifies on the hand mold, it is shaped into a glove. The shaped glove is then removed from the hand mold.

[0027] The coatings in S1 include: filamentous materials of hot-melt polymers, hot-melt adhesives, solutions, hot-melt microparticles, suspensions, emulsions, etc. Based on the design appearance or performance requirements of the glove, several target areas for spraying are defined on the surface of the hand mold. During spraying in S3, one or more materials are selectively sprayed onto the target areas of the hand mold; that is, one or more coatings can be sprayed onto the same area. In S3, before spraying the coating onto the surface of the hand mold, a release agent is first applied to the surface of the hand mold. This release agent is used to reduce the adhesion between the coating and the surface of the hand mold during the shaping process, improving the ease of removing the shaped glove from the hand mold.

[0028] like Figure 1 As shown, for gloves with a non-full-coverage appearance, certain areas on the hand mold do not require coating. The device in S1 also includes a baffle, which is movably connected to the hand mold. When connected, the baffle abuts against the areas of the hand mold surface that do not require coating. S3 includes the following steps in sequence: S31: Press the baffle against one or more sides of the hand mold; S32: Apply coating to the surface of the glove using a spraying device; S33: After the gloves are shaped, separate the baffle from the gloves.

[0029] During the spraying process, a small amount of paint will still be sprayed onto the surface of the baffle; when the baffle is separated from the glove, the paint on the hand mold and the paint on the baffle are also separated at the same time, and the outline of the paint attached to the hand mold becomes the outline of the baffle. As a result, the final appearance of the finished glove is more precise and regular.

[0030] like Figure 1 As shown, the equipment also includes a mold, and S3 includes pressure processing. The mold is movably connected to the hand mold. Pressure processing occurs after spraying is complete. After the paint is sprayed onto the hand mold, the mold moves towards the hand mold and abuts against the surface of the paint on the hand mold. For fluid-based coatings, such as hot melt adhesives and solutions, pressure processing is performed while the coating is solidifying on the hand mold and still has plasticity. This allows the coating surface to acquire a texture or roughness corresponding to the mold surface, meeting the characteristic design requirements. For fibrous or filamentous coatings, the mold and hand mold work together to compress the coating during pressure processing, increasing the density of the coating on the hand mold surface, thereby improving the final glove product's density, structural strength, and structural stability.

[0031] like Figure 2 and 3As shown, when the coating is a filamentous material of a hot-melt polymer, the spray nozzle of the spraying equipment cannot be directly facing the side of the fingers due to the shape limitations of the hand mold. This results in the filamentous fiber coating on the side of the fingers being the loosest and having the most burr defects after setting. To improve the pressure treatment effect of the mold on the coating on the side of the fingers, the mold includes abutment templates and finger gap modules. The finger gap module includes four mating protrusions, and there are two abutment templates, both slidably disposed on the finger gap module. The two abutment templates are located on opposite sides of the mating protrusions. The finger gap module is equipped with a drive mechanism (such as a bidirectional screw, not shown in the figure) for driving the two abutment templates to move synchronously towards or away from each other. During pressure treatment, the mold moves from top to bottom towards the hand mold, with the four mating protrusions located at the four finger gap positions of the hand mold. Then, the two abutment templates move towards the hand mold simultaneously. The opposite sidewalls of the two abutment templates are respectively formed with cavities and grooves corresponding to the three-dimensional shape of the hand mold. Figure 2 (Not shown in the image), one abutting template presses against the paint on the back of the hand mold, and the other abutting template presses against the paint on the palm of the hand mold, thereby applying pressure to the filamentous fibers on the surface of the hand.

[0032] like Figure 2 and 3 As shown, the protrusions do not exert contact pressure on the paint on the hand-touching surface. An airflow channel is provided within the finger gap module, and each protrusion has an air hole facing the side of the hand mold's fingers. When each protrusion is within the finger gap, as the contact template moves, airflow is introduced into the airflow channel through an external air source. The airflow flows out through the air hole and blows towards the side of the fingers, effectively smoothing the suspended fibrous edges in a "non-contact" manner. When the contact templates on both sides approach the hand mold, the number of suspended fibrous edges decreases, increasing the efficiency of pressure treatment of the paint.

[0033] Between S3 and S4, post-processing of the gloves is also included, such as heat drying, cooling, and natural drying, which aims to improve the setting speed of the coating on the hand mold surface. Depending on the design performance requirements of the gloves, S4 also includes post-finishing processes, such as etching the coating using lasers, plasma, metal tools, high-pressure gas / liquid, or high-speed particles. This is used to change the physicochemical properties of the coating surface so that the final molded glove meets the design standards.

[0034] Example 1, In this embodiment, the gloves are designed with half fingers for both the little finger and the ring finger. The coating material is polyester fiber filaments (polyester fiber), and the hand mold and the baffle are made of metal, preferably aluminum alloy.

[0035] When preparing the coating, polyester fiber raw materials must be used in conjunction with necessary fiber adhesives. The baffle is sleeve-shaped and is placed over the little and ring fingers of the hand mold before spraying. A greater thickness is required in the palm area, therefore a higher coating amount is applied there. During spraying, the liquid in the coating evaporates rapidly within a short time after contact with the hand mold, leaving a non-woven fabric-like coating. After spraying, the baffle is removed. During removal, the coating between the baffle and the hand mold can be cut to reduce the pulling effect on the fibrous material on the hand mold. Subsequently, depending on requirements, selective pressure treatment, post-treatment, and finishing processes are applied to the coating.

[0036] Example 2: In this embodiment, the gloves are made of nitrile rubber, and the coatings are orange and black nitrile rubber. The orange nitrile rubber serves as the base for completely covering the hand mold; that is, the entire surface of the hand mold is the target area for spraying the orange nitrile rubber coating. Specifically, the coating thickness is greater on the back of the hand and the lower two-thirds of the length of the fingers on the back of the hand than on other areas. After the orange nitrile rubber has solidified, the black nitrile rubber is then sprayed onto the hand mold, targeting the palm, the palm side of the fingers, and the upper third of the length of the back side of the fingers.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spray molding process for producing gloves, characterized in that: The steps are as follows: S1: Material and equipment preparation: The equipment includes a hand mold, a spraying device and a pressing mold, and the materials include a coating for making gloves, the coating including filamentous fibers of a hot melt polymer. S2: Prepare the paint to the state ready for spraying; S3: Paint spraying and pressure treatment: Paint is sprayed onto the hand mold using a spraying device, so that the paint adheres to the surface of the hand mold; the pressure mold is movably connected to the hand mold, and after the paint is sprayed onto the hand mold, the pressure mold moves towards the hand mold and abuts against the surface of the paint on the hand mold; The molding die includes abutment templates and a finger-seam module. The finger-seam module includes four mating protrusions. There are two abutment templates, both of which are slidably disposed on the finger-seam module. The two abutment templates are located on opposite sides of the mating protrusions. The finger-seam module is provided with a driving mechanism for driving the two abutment templates to move synchronously towards or away from each other. During pressure processing, the pressure mold moves from top to bottom toward the hand mold, and the four mating protrusions are respectively located at the four finger gaps of the hand mold. Then, the two abutting templates move toward the hand mold at the same time. The opposite side walls of the two abutting templates are respectively formed with cavity grooves corresponding to the three-dimensional shape of the hand mold. One of the abutting templates presses against the paint on the back of the hand mold, and the other abutting template presses against the paint on the palm of the hand mold, thereby applying pressure to the filamentous fibers on the surface of the hand mold. The finger gap module has an airflow channel, and each mating protrusion has an air hole. The air hole faces the side of the hand mold's fingers. When each mating protrusion is in the finger gap, it moves against the template while airflow is introduced into the airflow channel through an external air source. The airflow flows out through the air hole and blows towards the side of the fingers to non-contactly clean the suspended filamentous burrs. S4: Shaping: After the paint solidifies on the hand mold, it is shaped into a glove. The shaped glove is then removed from the hand mold.

2. The spray molding production process for gloves according to claim 1, characterized in that: The coating in S1 also includes hot-melt microparticles.

3. The spray molding process for producing gloves according to claim 2, characterized in that: During S3 spraying, one or more materials are selectively sprayed onto the target area of ​​the hand mold.

4. The spray molding production process for a glove according to any one of claims 1-3, characterized in that: In step S3, before spraying the coating onto the surface of the hand mold, a release agent is first applied to the surface of the hand mold.

5. The spray molding production process for a glove according to any one of claims 1-3, characterized in that: The device described in S1 further includes a baffle, which is movably connected to the hand mold. During spraying, the baffle abuts against the surface of the hand mold. S3 includes the following steps in sequence: S31: Press the baffle against one or more sides of the hand mold; S32: Apply coating to the surface of the glove using a spraying device; S33: After the gloves are shaped, separate the baffle from the gloves.

6. The spray molding production process for gloves according to claim 1, characterized in that: Between S3 and S4, there is also post-treatment of the gloves, including: heat drying, cooling, and natural drying.

7. The spray molding process for producing gloves according to claim 1, characterized in that: The S4 also includes post-processing technology.

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