Process for the application of a flexible material

Abstract

The application discloses a process method for flexible material lamination, which comprises the following steps: transferring a flow tooling in which a to-be-processed assembly is arranged to one of pressure processing stations; extruding a flexible protective pad in the to-be-processed assembly to stretch the middle part of the flexible material downward and laminate the bottom surface of a shell part, so as to obtain a first assembly part; transferring the first assembly part to another pressure processing station; extruding the flexible protective pad of the first assembly part to stretch the peripheral side of the flexible material downward and horizontally, and laminate the side wall and the curved surface section of the shell part, so as to obtain a finished assembly part. Therefore, the flow tooling is circulated between the processing stations, the bottom surface of the flexible material is stretched and laminated in sequence, the peripheral side of the flexible material is stretched and laminated, the processing conditions of each step are monitored, the processing conditions of each step are monitored, and the mold structures corresponding to the pressure processing stations are designed in a targeted manner, so that the processing is facilitated.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, and in particular to a process method for bonding flexible materials. Background Technology

[0002] With the development of the manufacturing industry, the requirements for product component assembly are becoming increasingly stringent. The demand for product quality and shipment volume is also growing daily. To meet the process requirements of bonding flexible, stretchable materials to rigid shell parts, the flexible, stretchable materials need to be stretched and laminated. Taking fabric as an example, the warp and weft threads need to be uniform and not show through the base color of the shell; taking leather as an example, the thickness needs to be uniform. To achieve these processing requirements, a reasonable design of the bonding process between the flexible material and the shell parts is necessary. Summary of the Invention

[0003] The main objective of this invention is to propose a process for bonding flexible materials, in which flexible materials are stretched and bonded to each part of the corresponding shell component in sequence to complete the assembly process.

[0004] To achieve the above objectives, the present invention proposes a process method for bonding flexible materials, comprising:

[0005] The flow tooling containing the assembly to be processed is transferred to one of the pressure processing stations;

[0006] The flexible protective pad in the assembly to be processed is squeezed to stretch the center of the flexible material downward and fit it against the bottom surface of the housing part to obtain the first assembly part;

[0007] The first assembled parts are transferred to another pressure processing station;

[0008] The flexible protective pad of the first assembled part is squeezed to stretch the flexible material downward and horizontally around its periphery, and to fit it against the side wall and curved section of the shell part to obtain the finished assembled part.

[0009] Optionally, the step of extruding the flexible protective pad of the first assembled part to stretch the flexible material circumferentially downward and horizontally, and to attach it to the sidewall and curved section of the housing part to obtain the finished assembly includes:

[0010] The flexible protective pad of the first assembled part is squeezed to stretch the flexible material obliquely around its periphery and fit it with the curved section of the shell part to obtain the second assembled part.

[0011] The second assembled parts are transferred to another pressure processing station;

[0012] The flexible protective pad of the second assembly is squeezed to stretch the flexible material horizontally around its periphery and fit it against the side wall of the housing part to obtain the finished assembly.

[0013] Optionally, the step of transferring the flow tool with the assembly to be processed to one of the pressure processing stations further comprises:

[0014] pre-stretching the flexible material;

[0015] sequentially mounting the pre-stretched flexible material and the horizontally arranged flexible protective pad on the flow tool.

[0016] Optionally, in the step of pre-stretching the flexible material, the flexible material is pre-stretched until the stretching rate reaches 50%-70%.

[0017] Optionally, the step of pre-stretching the flexible material further comprises:

[0018] cutting the roll material to obtain a sheet-shaped flexible material;

[0019] punching the sheet-shaped flexible material to be assembled with the flow tool.

[0020] Optionally, the step of pre-stretching the flexible material further comprises:

[0021] applying adhesive to a part of the flexible material.

[0022] Optionally, in the step of applying adhesive to a part of the punched flexible material, the area of the region of the flexible material to which adhesive is applied is larger than the area of the inner surface of the shell part.

[0023] Optionally, the step of transferring the first assembly part to another pressure processing station further comprises:

[0024] removing the flexible protective pad in the first assembly part and replacing it with a flexible protective pad that is adapted to the shell part.

[0025] Optionally, the step of extruding the flexible protective pad of the first assembly part to stretch the peripheral side of the flexible material downward and horizontally and fit it to the side wall and curved section of the shell part to obtain the finished assembly part further comprises:

[0026] In the process of stretching the peripheral side of the flexible material of the first assembly part and fitting it to the side wall and curved section of the shell part, the edge of the middle part of the flexible material is repeatedly pressed.

[0027] Optionally, the step of extruding the flexible protective pad of the first assembly part to stretch the peripheral side of the flexible material downward and horizontally and fit it to the side wall and curved section of the shell part to obtain the finished assembly part further comprises:

[0028] The flexible protective sleeve in the finished assembly is removed, and the exposed flexible cloth is cut to remove waste.

[0029] In the technical solution of the present application, the middle part of the flexible material is stretched and attached to the bottom surface of the shell part in one of the pressure processing stations, and on the basis of the first processing, the flow tooling is moved to another pressure processing station for secondary processing, the peripheral side of the flexible material is stretched and attached to the side wall and curved section of the shell part, so that the bottom surface of the flexible material is stretched and attached in turn by transferring the flow tooling between the processing stations, the peripheral side of the flexible material is stretched and attached, the processing conditions of each step are monitored, the processing conditions of each step are monitored, and the mold structure corresponding to each pressure processing station is designed in a targeted manner, which is simpler in structure and more convenient to process. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0031] Figure 1 The flowchart of an embodiment of the process method for attaching the flexible material provided by the present application is shown in the figure.

[0032] Figure 2 For Figure 1 The flowchart of the process method for attaching the flexible material in the middle is shown in the figure.

[0033] Figure 3 For Figure 1 The schematic diagram of another embodiment of the process method for attaching the flexible material is shown in the figure.

[0034] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] It should be noted that if the embodiment of the present application involves a directional indication, the directional indication is only used to explain the relative position relationship, motion condition and the like between components in a certain posture, and if the certain posture changes, the directional indication also changes accordingly.

[0037] In addition, if the embodiment of the present application involves the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0038] With the development of manufacturing industry, the requirements for product component assembly are getting higher and higher. The quality and shipment quantity of products are also increasing day by day. In order to meet the process requirements of flexible and extensible material adhering to the hard shell part, the flexible and extensible material needs to be stretched and attached. Taking cloth as an example, the warp and weft should be uniform and cannot penetrate the bottom color of the shell. Taking leather as an example, the thickness should be uniform. In order to meet the processing requirements, it is necessary to reasonably design the adhesion process of flexible material and shell part.

[0039] Therefore, the present application provides a process method for adhering flexible material, which stretches and attaches the flexible material to each part of the shell part in turn, so as to complete the assembly process and meet the process requirements. Figures 1 to 3 The embodiment of the process method for adhering flexible material provided by the present application.

[0040] It should be noted that the present application does not limit the specific material of the flexible material, which can be a flexible material with extensibility such as microfiber cloth and leather. The open upper end of the shell part refers to the shape of the shell when it swings on the flow tooling. The orientation in actual use is not limited, and the specific material of the shell part is also not limited. The process method is described below by taking the flexible cloth adhering to the plastic material mobile phone shell as an example.

[0041] Please refer to Figures 1 to 2 , the process method for adhering flexible material includes the following steps:

[0042] S10: moving the flow tooling on which the combined parts to be processed are placed to one of the pressure processing stations;

[0043] It can be understood that the installation of the circulating tooling can be directly performed by manual operation, or the circulating tooling can be directly transferred to the present process after the processing in the previous process is completed by using a conveying belt, a mechanical hand and the like, and attention should be paid to the placement position of the circulating tooling when the installation of the circulating tooling is performed.

[0044] S20: The flexible protective pad in the assembly to be processed is extruded to stretch the middle part of the flexible material downward and adhere to the bottom surface of the shell part, so that a first combined part is obtained.

[0045] It can be understood that, since the present step only stretches the middle part downward to adhere to the bottom surface of the shell part in the horizontal plane, a convex die structure can be designed to perform pressure processing to achieve stretching and adhering, and after the processing is completed, only the middle part of the flexible material is stretched and adhered to the shell part, the surface of the adhered part is fixed due to the adhesion, but the remaining part still maintains the extension, and since the middle part is stretched and adhered, the side part should be in a state of being stretched and hanging in the air.

[0046] S30: The first combined part is transferred to another pressure processing station.

[0047] It can be understood that the installation of the circulating tooling can be directly performed by manual operation, or the circulating tooling can be directly transferred to the present process after the processing in the previous process is completed by using a conveying belt, a mechanical hand and the like, and attention should be paid to the placement position of the circulating tooling when the installation of the circulating tooling is performed.

[0048] S40: The flexible protective pad of the first combined part is extruded to stretch the peripheral side of the flexible material downward and horizontally, and adhere to the side wall and the curved surface of the shell part, so that a finished assembly is obtained.

[0049] In the technical solution of the present application, the middle part of the flexible material is stretched and adhered to the bottom surface of the shell part in one of the pressure processing stations, the circulating tooling is transferred on the basis of the first processing to perform secondary processing in another pressure processing station, the peripheral side of the flexible material is stretched and adhered to the side wall and the curved surface of the shell part, so that the circulating tooling is circulated between the processing stations to sequentially stretch and adhere the bottom surface of the flexible material and stretch and adhere the peripheral side of the flexible material, the processing conditions of each step are monitored, the processing conditions of each step are monitored, and the die structures corresponding to the pressure processing stations are designed in a targeted manner, the structure is simpler, and the processing is facilitated.

[0050] It can be understood that the process method proposed in the present application divides the adhering step into at least two times, the stretching and adhering actions are performed by using a convex die structure for hot pressing in one pressure processing station, and the die structure needs to be designed to have a curved surface shape and a straight edge shape corresponding to the side wall in the second pressure processing station.

[0051] Since the shell part is disassembled into a bottom surface, a side wall and a curved surface segment between the bottom surface and the side wall, and considering that the directions of the main forces in the process of fitting the curved surface segment and the side wall are different, the fitting steps can also be divided into three times, please refer to Figure 3 , specifically, step S40 comprises:

[0052] S41: extruding the flexible protective pad of the first combined part to stretch the flexible material obliquely on the periphery and fit the curved surface segment of the shell part, to obtain a second combined part;

[0053] That is, only the fitting of the curved surface segment is performed in the pressure processing station, and the design of the mold structure needs to be paid attention to. When the stretching action is performed, the flexible material still has part of the cloth that has not been stretched. After the fitting is completed, there is still a segment that is stretched straight and suspended in the air.

[0054] When the mold structure is designed, since the curved surface segment itself occupies a small size, in order to facilitate the positioning of processing, the part of the flexible material that has been fitted can be repeatedly pressed, and the mold pressing distance and the mold size need to be reasonably designed to ensure the uniformity of the material surface.

[0055] S42: moving the second combined part to another pressure processing station;

[0056] It can be understood that the present application does not limit the arrangement form of the three pressure processing stations, which can be arranged in sequence along the straight line direction or can be arranged in a circumferential direction, and the reasonable planning is made according to the processing site and space layout.

[0057] S43: extruding the flexible protective pad of the second combined part to stretch the flexible material horizontally on the periphery and fit the side wall of the shell part, to obtain a finished combined part.

[0058] That is, only the fitting of the side wall is performed in the pressure processing station, and the force applied when the fitting is performed is directed towards the side. When the fitting of this step is performed, the mold structure can be designed to always not contact the shell bottom surface structure. If the contact positioning is needed, the part of the flexible material that has been fitted can be repeatedly pressed, and the mold pressing distance and the mold size need to be reasonably designed to ensure the uniformity of the material surface.

[0059] It can be understood that the flexible material and the shell part are usually bonded together, and the shell part or the flexible material can be coated, therefore, the mold used in each pressure processing station is generally a hot pressing mold to activate the adhesive by hot pressing.

[0060] Further, step S10 further comprises a preparation work of the flexible material, specifically comprising the following steps:

[0061] pre-stretching the flexible material;

[0062] It can be understood that the lower pressing stroke of the mold structure of each pressure processing station is limited by the depth of the shell part, so the flexible material is pre-stretched to avoid processing failure caused by insufficient stretching. The present application does not limit the way of pre-stretching step, and the flexible material can be pre-stretched alone at a temperature of 70-80 DEG C through other punch equipment.

[0063] The pre-stretched flexible material and the horizontally arranged flexible protective pad are sequentially installed on the flow tooling.

[0064] In the fitting method of the present application, the middle part of the flexible material is first stretched, and no misfitting occurs at other positions. Therefore, a sheet-shaped protective pad arranged horizontally in a natural state is installed above the flexible material, which plays a protective role. At the same time, the stress position and stress deformation state of the flexible protective pad are relatively close to the flexible material itself, so that it can be ensured that the flexible material will not be squeezed at the position which has not been stretched, and the subsequent processing steps will not be affected.

[0065] Specifically, the flexible material is pre-stretched until the stretching rate reaches 50%-70%. Preferably, the stretching rate is 60%.

[0066] Furthermore, the step of pre-stretching the flexible material further comprises:

[0067] The roll material is cut to obtain a sheet-shaped flexible material;

[0068] The material is also in the form of roll material when purchased, and needs to be processed by equipment such as a cutting machine before use.

[0069] The sheet-shaped flexible material is punched to be positioned and assembled with the flow tooling;

[0070] Specifically, the sheet-shaped flexible material is installed on the flow tooling by positioning pins or clamps. In this way, the flow tooling and the flexible material edge connection position can always provide a tensioning force to the flexible material, which can avoid the distance between the flexible material and the cavity being too close. The punched position needs to be reasonably designed considering the elongation of the material.

[0071] Furthermore, the step of pre-stretching the flexible material further comprises:

[0072] The local part of the flexible material is coated with adhesive.

[0073] That is, the present application coats the surface of the flexible material with adhesive. This is because the shell part has a specific shape, and it is relatively inconvenient to apply adhesive. The flexible material has a flat structure, and the adhesive can be applied by a hot stamping machine without affecting the subsequent stretching.

[0074] Further, the flexible material is coated with adhesive on the local part, and it can be understood that the flexible material is made adhesive only at the corresponding position, and the adhesive material is not specifically limited.

[0075] It can be understood that the area of the region of the flexible material coated with adhesive is larger than the area of the inner surface of the shell part, so as to avoid the abnormal situation of local glue sticking caused by positioning deviation.

[0076] Further, step S30 further comprises:

[0077] The flexible protective pad in the first combined part is removed and replaced with a flexible protective pad compatible with the shell part.

[0078] This is because in the subsequent processing step, it is necessary to cooperate with the curved section and the side wall of the shell part, so the flexible protective pad is selected to be profiled to improve the fitting effect with the shell part, provide smaller resistance in the mold pressing process, and at the same time play the role of protecting the flexible material,

[0079] It can be understood that because the stretching state of the initially profiled flexible material has not reached the final state, the protective pad will be extruded, causing deformation after installation, which does not affect the use effect.

[0080] Further, in step S40, the edge of the middle part of the flexible material is repeatedly pressed during the stretching of the peripheral side of the flexible material of the first combined part and the fitting with the side wall and the curved section of the shell part.

[0081] When designing the mold structure, because the internal space of the shell part itself is small, in order to facilitate the positioning of processing, the outer edge of the part of the flexible material that has been fitted with the bottom surface is repeatedly pressed, so that secondary fitting occurs, and the mold pressing distance and mold size need to be reasonably designed to ensure the uniformity of the material surface after secondary pressing.

[0082] Further, step S40 further comprises:

[0083] The flexible protective sleeve in the finished combined part is removed, and the exposed flexible cloth is cut to remove the waste material.

[0084] Specifically, the laser cutting method is used to cut the excess cloth, and the excess cloth can be manually removed.

[0085] In addition, before processing, the flexible material is subjected to plasma treatment, and after the excess cloth is removed, the side wall of the shell part is subjected to secondary fitting.

[0086] Specifically, the flow dress is provided with a shell part with an open upper end, and then a pre-stretched flexible cloth and a flexible protective pad are assembled in sequence, and the material of the flexible protective pad is preferably a silica gel pad. In the processing process of the present application, first, a sheet-shaped protective pad is used for first stretching and fitting, and then a profiled protective pad is replaced for second or even third stretching and fitting, so that the fitting of the flexible material and each part of the shell part is completed in sequence, the local fitting precision is ensured, and the process requirements are met.

[0087] The above description is only the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application, using the contents of the present application specification and drawings, or directly / indirectly applied in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A process for bonding flexible materials, characterized in that, Includes the following steps: The flow tooling containing the assembly to be processed is transferred to one of the pressure processing stations; The flexible protective pad in the assembly to be processed is squeezed to stretch the middle of the flexible material downward and fit it against the bottom surface of the shell part to obtain the first assembly. In the first assembly, the middle of the flexible material is stretched and firmly connected to the shell part, and the side of the flexible material is in a stretched and suspended state. The first assembled parts are transferred to another pressure processing station; The flexible protective pad of the first assembled part is squeezed to stretch the flexible material downward and horizontally around its periphery, and it is then fitted to the side wall and curved section of the housing part to obtain the finished assembly. The step of extruding the flexible protective pad of the first assembled part to stretch the flexible material circumferentially downward and horizontally, and attaching it to the side wall and curved section of the housing part to obtain the finished assembly includes: The flexible protective pad of the first assembled part is squeezed to stretch the flexible material obliquely around its periphery and fit it with the curved section of the shell part to obtain the second assembled part; wherein, during the stretching action, there are still some unstretched fabrics in the flexible material, and after the fitting is completed, there are still sections that are stretched and suspended in the air. The second assembled parts are transferred to another pressure processing station; The flexible protective pad of the second assembled part is squeezed to stretch the flexible material horizontally around its periphery and fit it against the side wall of the housing part to obtain the finished assembly. During this fitting step, the mold structure does not contact the bottom surface structure of the housing. The step of transferring the flow tooling containing the assembly to be processed to one of the pressure processing stations also includes: Pre-stretch the flexible material; The pre-stretched flexible material and the horizontally positioned flexible protective pad are installed sequentially on the flow tooling.

2. The process method for bonding flexible materials as described in claim 1, characterized in that, In the step of pre-stretching the flexible material, the flexible material is pre-stretched until the stretching rate meets 50%-70%.

3. The process method for bonding flexible materials as described in claim 1, characterized in that, The process before the step of pre-stretching the flexible material also includes: The rolled material is cut into sheet-like flexible material; The sheet-like flexible material is perforated to facilitate positioning and assembly with distribution tooling.

4. The process method for bonding flexible materials as described in claim 3, characterized in that, The process before the step of pre-stretching the flexible material also includes: Apply adhesive backing to specific areas of flexible materials.

5. The process method for bonding flexible materials as described in claim 4, characterized in that, In the step of applying adhesive backing to a portion of the perforated flexible material, the area of ​​the area where the adhesive backing is applied to the flexible material is larger than the area of ​​the inner surface of the housing part.

6. The process method for bonding flexible materials as described in claim 1, characterized in that, Prior to the step of transferring the first assembled part to another pressure processing station, the following is also included: Remove the flexible protective pad from the first assembly and replace it with a flexible protective pad that is compatible with the housing parts.

7. The process method for bonding flexible materials as described in claim 1, characterized in that, In the step of squeezing the flexible protective pad of the first assembled part to stretch the flexible material circumferentially downward and horizontally, and to fit it against the side wall and curved section of the shell part to obtain the finished assembly: During the process of stretching the periphery of the flexible material of the first assembled part and fitting it to the side wall and curved section of the shell part, the edge of the middle part of the flexible material is repeatedly pressed.

8. The process method for bonding flexible materials as described in claim 1, characterized in that, The step of squeezing the flexible protective pad of the first assembled part to stretch the flexible material circumferentially downward and horizontally, and to fit it against the side wall and curved section of the housing part to obtain the finished assembly further includes: Remove the flexible protective sleeve from the finished assembly and cut the exposed flexible fabric to remove waste material.

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