Preparation method for processing and forming box body

Abstract

The invention discloses a preparation method for box body processing and forming. The preparation method comprises the steps of covering the front face of a plate with a veneer, slotting a surrounding plate, holing the surrounding plate, carrying out assembly line frame splicing and forming, carrying out side plate polishing and dust collection, gluing the side plate with the veneer, carrying out connector trimming treatment, carrying out box body forming treatment and carrying out box body dust removal. According to the preparation method, an automatic coating machine is adopted to perform patch coating on the plate, the process of cutting small materials can be reduced, the plate patch qualification rate and efficiency are higher, a V-groove machine is adopted to perform slotting on the box body surrounding plate, the process of manually pasting the skin on the surrounding plate is reduced, the skin pasting production efficiency is improved, and through cooperation of the automatic coating machine, the V-groove machine and other devices, the production cost is reduced, and the production efficiency is improved. Manual intervention is reduced, and box production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sound box processing, and in particular to a preparation method for box processing and molding. Background Art

[0002] Wooden speakers use wooden boards as the speaker box. Wooden boards have sufficient mechanical strength to prevent the box from deforming when the speaker unit vibrates. The existing wooden box molding and preparation process includes: material selection, manual board veneer, cutting the veneered boards into box enclosures, manual veneer on the enclosures, manual hand-held hole-opening tools to open holes in the enclosures, manual assembly of the box using polyurethane wood glue, and pressurization with a clamp. The existing wooden speaker preparation process has the following shortcomings:

[0003] 1) Traditional cabinet preparation mostly relies on full manual operation, which has problems such as low efficiency, poor interface accuracy, and uneven surface treatment;

[0004] 2) Manual veneer is used for panel veneer, which has low efficiency, uneven glue layer, and coating bubbles. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a preparation method for the defects of the prior art, which adopts an automatic covering machine to patch the plate, reduces the process of cutting small materials, has a higher qualified rate and efficiency of plate patching, adopts a V-groove machine to groove the box enclosure, reduces the manual skinning process for the enclosure, improves the skinning production efficiency, and reduces manual intervention and improves the box production efficiency through the coordination of multiple equipment such as the automatic covering machine and the V-groove machine.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A method for processing and forming a box body, the method comprising the following steps:

[0008] Step 1) Laminate the front of the board: Use an automatic laminating machine to apply PVC film to the front of the box board;

[0009] Step 2) Slotting of the enclosure: Mark the dimensions according to the three views of the box body drawing, start the V-groove cutting machine to cut the V-grooves on the laminated sheets in step 1) to obtain the enclosure;

[0010] Step 3) Hole drilling on the enclosure: mark the speaker holes and installation holes according to the three views of the box drawing, and use CNC equipment to process the speaker holes and installation holes;

[0011] Step 4) Assembly line frame forming: put the grooved enclosures into the assembly line, glue the V-grooves of the enclosures with PVC glue, and fold the enclosures together to form a trapezoidal frame;

[0012] Step 5) Side panel grinding and dust collection: According to the three views of the box body drawing, cut the bare blank sheet into the left and right panels of the trapezoidal frame, use 240# sandpaper to finely grind the manual grinding areas of the left and right panels, and manually hold an electric grinder to grind the front edges and sharp angles of the left and right panels to eliminate the edges and sharp angles. After grinding, remove dust with a dust removal vacuum cleaner;

[0013] Step 6) Glue coating and laminating of side panels: Use a glue coating machine to apply PVC glue on the front of the left and right side panels. The amount of PVC glue applied is 58-59g / m 2 , stick the left and right films coated with glue on the left and right panels respectively, and form a layer of PVC skin on the surface of the left and right panels after natural curing;

[0014] Step 7) Interface edge trimming: Use a blade to trim the corner interfaces of the left and right side panels;

[0015] Step 8) Box forming process: Apply adhesive to the bevel of the left side of the trapezoidal frame, install the left side plate to the left side of the trapezoidal frame, apply adhesive to the bevel of the right side of the trapezoidal frame, and install the right side plate to the right side of the trapezoidal frame to obtain a trapezoidal box;

[0016] Step 9) Dust removal of the box: Use an air gun to blow away the dust on the trapezoidal box formed in step 8), and then clean it with an alcohol cloth.

[0017] Furthermore, the specific operation process of applying the front surface coating with the veneer in step 1) further includes:

[0018] Step 11) Plate pretreatment: Cut the plate according to the three views of the box body drawing. The thickness of the cut plate is 15-25mm. Dust the cut plate.

[0019] Step 12) Feeding process: Place the cut sheet in reverse on the sheet feeding guide roller of the automatic coating machine, and load the PVC film onto the PVC unloading guide roller of the automatic coating machine;

[0020] Step 13) Gluing treatment: The PVC film is sent to the gluing station of the automatic coating machine under the action of the film guide roller, and the gluing station coats the PVC film with glue;

[0021] Step 14) Coating treatment: The sheet material is sent to the hot pressing guide roller under the conveying action of the feeding guide roller, and at the same time, the PVC film coated with glue is sent to the hot pressing guide roller under the action of the film feeding guide roller. The PVC film is pressed tightly onto the front side of the sheet material by the hot pressing of the hot pressing guide roller to realize sheet pasting.

[0022] Furthermore, in step 13), the glue coating station uses a glue coating shaft to apply glue to the PVC film, and the glue coating mesh of the glue coating shaft is a 140*55 gravure mesh roller, and the glue coating amount is about 2.2g / m 2 The glue applied on the PVC film is 801D glue, the thickness of the glue applied is 0.07mm, and the glue coating station uses a 0.25 plug gauge to scrape the glue to apply glue to the PVC film.

[0023] Furthermore, in step 14), the hot pressing temperature of the hot pressing guide roller is 70-75° C., and the hot pressing time is 8-10 minutes.

[0024] Furthermore, the specific operation process of the assembly line frame forming in step 4) also includes:

[0025] Step 41) The conveying speed of the assembly line is 1-2 m / min, and the solid content of the PVC glue is ≥ 40%;

[0026] Step 42) bend the corners of the enclosure grooves to form a trapezoidal frame, use masking tape to fix the assembled trapezoidal frame, let it stand and solidify for 12 hours, then remove the masking tape.

[0027] Furthermore, the V-groove opened in step 2) is opened with a depth of 0.2-0.25 mm based on the thickness of the plate, and the angle of the V-groove is 45 degrees.

[0028] Further, in step 3), the CNC equipment adopts The carbide drill bit is used to process the mounting holes at a speed of 8000rpm, and the speaker holes are processed at a speed of 6000rpm-7000rpm.

[0029] Furthermore, the suction force of the dust removal vacuum cleaner in step 5) is ≥2000Pa.

[0030] Furthermore, in step 8), the adhesive applied to the hypotenuse on the left side of the trapezoidal frame and the adhesive applied to the hypotenuse on the right side of the trapezoidal frame are both TY-3100D yellow glue.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1) The preparation method of the present invention includes coating the front of the board with skin, grooving the enclosure, opening holes in the enclosure, assembly line frame forming, side panel grinding and vacuuming, side panel gluing and skinning, interface chamfering, box forming, and box dust removal. The preparation method of the present invention uses an automatic coating machine to wrap the board with patches, which can reduce the process of cutting small materials, and the qualified rate and efficiency of board patching are more efficient. A V-groove machine is used to groove the enclosure of the box, reducing the manual skinning process for the enclosure and improving the skinning production efficiency. Through the coordination of multiple equipment such as automatic coating machines and V-groove machines, manual intervention is reduced, and the box production efficiency is improved. The box prepared by this preparation method has anti-drop performance and can be stored at high temperature. The box skin has good adhesion at different temperatures, especially in high temperature environments.

[0033] 2) The preparation method of the present invention is provided with a slotting process mainly to improve the forming efficiency of the sound box, so that the box can be quickly folded and synthesized, and the internal stress of the box can be evenly distributed when it is bent. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the process of processing and forming the box body of the present invention;

[0035] Figure 2 A side view of the slotted and holed enclosure of the present invention;

[0036] Figure 3 It is a front view of the slotted and holed enclosure of the present invention;

[0037] Figure 4 It is a structural diagram of the box body molding of the present invention;

[0038] Figure 5 It is a structural schematic diagram of the coating machine of the present invention.

[0039] In the figure: plate 1, enclosure 2, V-groove 21, speaker hole 22, mounting hole 23, trapezoidal box 3, automatic coating machine 4, feeding guide roller 41, film placing guide roller 42, gluing station 43, hot pressing guide roller 44. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the accompanying drawings, which are part of this specification and illustrate the principles of the present invention through embodiments. Other aspects, features and advantages of the present invention will become clear from the detailed description. In the drawings referred to, the same or similar parts in different figures are represented by the same reference numerals.

[0041] like Figure 1-Figure 4 As shown, the first embodiment of the present invention provides a method for processing and forming a box body, and the method comprises the following steps:

[0042] Step 1) The front side of the board 1 is coated with a veneer: the front side of the box board 1 is coated with a PVC film by using an automatic coating machine 4; the present invention uses a coating machine to paste the PVC film, which can reduce the process of cutting small materials, improve production efficiency, reduce the process of manual veneer of the enclosure 2, and improve the veneer production efficiency;

[0043] Step 2) Slotting the enclosure 2: according to the dimensions of the three views of the box body drawing, start the V-groove cutting machine to cut the V-groove 21 on the laminated sheet 1 in step 1) to obtain the enclosure 2;

[0044] Step 3) Opening holes in the enclosure 2: Mark the speaker hole position 22 and size according to the three-view drawing of the box body, and use CNC equipment to process the speaker hole position 22 and the installation hole position 23;

[0045] Step 4) Assembly line frame forming: put the grooved enclosure 2 into the assembly line, glue the V groove 21 of the enclosure 2 with PVC glue, and fold the enclosure 2 to assemble into a trapezoidal frame;

[0046] Step 5) Side panel grinding and dust collection: According to the three views of the box body drawing, cut the bare blank sheet 1 into the left and right panels of the trapezoidal frame, use 240# sandpaper to finely grind the manual grinding areas (joints) of the left and right panels, and manually hold an electric grinder to grind the front edges and sharp angles of the left and right panels to eliminate the edges and sharp angles. After grinding, remove dust with a dust removal vacuum cleaner, and the suction force of the dust removal vacuum cleaner is ≥2000Pa;

[0047] Step 6) Glue coating and laminating of side panels: PVC glue is coated on the front of the left and right side panels by a glue coating machine, and the amount of PVC glue is 58-59g / m2. The left and right films coated with glue are respectively pasted on the left and right side panels, and a layer of PVC skin is formed on the surface of the left and right side panels after natural curing. The glue coating machine adopts a strong smooth roller coating machine of model VT712-4;

[0048] Step 7) Interface edge trimming: Use a blade to trim the corner interfaces of the left and right side panels; the interface edge trimming is mainly to remove excess PVC skin on the edge, making the PVC interface smooth and burr-free, and the cutting depth is based on the edge of the box;

[0049] Step 8) Box forming process: Apply adhesive to the bevel of the left side of the trapezoidal frame, install the left side plate to the left side of the trapezoidal frame, apply adhesive to the bevel of the right side of the trapezoidal frame, and install the right side plate to the right side of the trapezoidal frame to obtain the trapezoidal box 3;

[0050] Step 9) Dust removal of the box: Use an air gun to blow away the dust on the trapezoidal box 3 formed in step 8), and then clean it with an alcohol cloth. The preparation process of the present invention can produce a trapezoidal box 3 and a bookshelf box, and also reduce woodworking processes, without the need to tear off adhesive tape and polish. The enclosure 2 is changed from traditional manual veneer to automatic wrapping veneer of the board 1, saving the planing process of a single component of the board 1, saving tape, saving the labor of tearing tape, saving the labor of box polishing blank grinding and veneer polishing, and saving the labor input of manual veneer.

[0051] like Figure 5 As shown, in the embodiment of the present invention, the specific operation process of the front surface coating with the skin in step 1) also includes:

[0052] Step 11) Pretreatment of the plate 1: Cut the plate 1 according to the three views of the box body drawing, the thickness of the cut plate 1 is 15-25mm, and the cut plate 1 is dust-removed;

[0053] Step 12) Feeding process: the cut sheet 1 is placed in reverse on the sheet 1 feeding guide roller 41 of the automatic coating machine 4, and the PVC film is loaded on the PVC unloading guide roller of the automatic coating machine 4;

[0054] Step 13) Gluing: The PVC film is sent to the gluing station 43 of the automatic coating machine 4 under the action of the film guide roller 42, and the PVC film is coated with glue by the gluing station 43. The gluing station 43 uses a gluing shaft to apply glue to the PVC film. The gluing mesh of the gluing shaft is a 140*55 gravure mesh roller, and the amount of glue applied is about 2.2g / m 2 The glue applied to the PVC film is 801D glue, and the thickness of the glue applied is 0.07mm. The glue application station 43 uses a 0.25 plug gauge to apply glue to the PVC film. The 801D glue has high initial adhesion and is very suitable for the patch of the plate 1;

[0055] Step 14) Coating treatment: the sheet 1 is sent to the hot pressing guide roller 44 by the conveying action of the feeding guide roller 41, and the PVC film coated with glue is sent to the hot pressing guide roller 44 by the film feeding guide roller. The PVC film is pressed tightly onto the front side of the sheet 1 by the hot pressing of the hot pressing guide roller 44 to realize the pasting of the sheet 1. The hot pressing temperature of the hot pressing guide roller 44 is 70-75°C, and the hot pressing time is 8-10 minutes to ensure that there are no bubbles in the pasting and the edges are straight.

[0056] The specific operation process of the assembly line frame forming in step 4) of the present invention also includes:

[0057] Step 41) The conveying speed of the assembly line is 1-2 m / min, and the solid content of the PVC glue is ≥ 40%;

[0058] Step 42) bend the two grooves of the enclosure to form a trapezoidal frame, use masking tape to fix the assembled trapezoidal frame, let it stand and solidify for 12 hours, and then remove the masking tape.

[0059] The V-groove 21 opened in step 2) is opened with a depth of 0.2-0.25 mm based on the thickness of the plate 1, and the angle of the V-groove 21 is 45 degrees. The grooving process is mainly set to improve the molding efficiency of the sound box, so that the box can be quickly bent and synthesized, and the internal stress of the box can be evenly distributed when it is bent.

[0060] In the specific implementation, in step 3), the CNC equipment adopts The carbide drill bit is used to process the mounting holes at a speed of 8000 rpm and the speaker hole position 22 is processed at a speed of 6000 rpm.

[0061] In specific implementation, in step 8), the adhesive applied to the bevel of the left side of the trapezoidal frame and the adhesive applied to the bevel of the right side of the trapezoidal frame are both TY-3100D yellow glue.

[0062] 2. The performance of the box obtained by the preparation method of the first embodiment is tested, and the test results are as follows:

[0063] (Test 1) Test on the box's anti-drop performance

[0064] 1) Test subjects:

[0065] The box body prepared by the preparation process of Example 1 is used as a test sample;

[0066] 2) Test conditions:

[0067] Laboratory environment: temperature 19.8±0.5℃, humidity 55±5%RH.

[0068] Three), test method:

[0069] Test equipment: drop test machine that complies with ISTA-1A standards;

[0070] Drop height: 800mm (calculated from the lowest point of the box to the impact surface);

[0071] Drop direction and number of times: Free fall on the bottom corners, edges, and front of the box in turn (3 times in total).

[0072] IV) Test conditions:

[0073] Inspection items Before the test After the test Appearance No abnormality in appearance No abnormality in appearance structure No structural abnormalities No structural abnormalities Function No abnormality in function No abnormality in function Package No abnormality in packaging No abnormality in packaging

[0074] V) Test results:

[0075] There are no cracks, dents or deformations on the appearance of the box, the box structure is intact, the sample passes the drop test, and meets the vertical impact performance requirements of GB / T4857.5-2020 transport packaging.

[0076] (Test 2) High temperature storage performance test of the box

[0077] 1) Preprocessing:

[0078] The box prepared by the preparation method of Example 1 was placed as a sample in a laboratory environment (temperature 18.8° C., humidity 41% RH) and left to stand for 24 hours.

[0079] 2) Test methods:

[0080] Test equipment: constant temperature test box (temperature control accuracy ±0.5℃), equipped with temperature and humidity recorder;

[0081] High temperature exposure: Place the sample horizontally in the test chamber to avoid stacking, and heat it to 55±2℃ at a rate of 3℃ / min for 16 hours;

[0082] Recovery treatment: After the test, remove the sample immediately and place it at room temperature (25±3℃) for 4 hours.

[0083] 3) Sample conditions:

[0084] Inspection items Before the test After the test Appearance and structure No abnormality in appearance No abnormality in appearance

[0085] Appearance inspection: visually and tactilely check that the cabinet has no deformation, no visible defects on the surface, and no cracks or debonding on the cabinet surface.

[0086] 4) Sample results:

[0087] The cabinet skin has good adhesion at different temperatures, especially in high temperature environments.

[0088] (Test 3) High humidity and heat performance test of the cabinet

[0089] 1) Test subjects:

[0090] The box prepared by the preparation method of the above embodiment 1 was taken as a test sample, and a constant humidity and heat storage test was carried out according to GB / T 2423.3 standard:

[0091] Initial state: Equilibrate in 19.7℃ / 39%RH laboratory environment for 24 hours.

[0092] 2) Test conditions:

[0093] Temperature: 40±2℃ (measured 41.5℃)

[0094] Humidity: 93±2%RH

[0095] Duration: 96 hours of continuous exposure

[0096] Recovery treatment: After the test, transfer to 25±3℃ environment and let it stand for 4 hours before testing. III) Test results:

[0097] Inspection items Before the test After the test Appearance and structure No abnormality in appearance No abnormality in appearance

[0098] After the test, there was no bubbling or whitening on the surface of the box, and there was no mold or bubbling on the box skin, and there was no separation between the skin and the box.

[0099] IV) Test results:

[0100] The box body prepared by the preparation process of the present invention has good adaptability to humidity changes and reliable adhesion.

[0101] Compared with the prior art, the technical solution disclosed in the above embodiment has the following beneficial effects:

[0102] In the above embodiment, the preparation method of the present invention adopts an automatic coating machine 4 for patch wrapping, which can reduce the process of cutting small materials. Compared with traditional manual skinning, the plate 1 of the present invention has a higher qualified rate and efficiency of patching, and improves the production efficiency of box forming preparation. The V-groove 21 machine is used to groove the box enclosure 2, reducing the manual skinning process of the enclosure 2 and improving the skinning production efficiency. Through the coordination of multiple equipment such as the automatic coating machine 4 and the V-groove 21 machine, manual intervention is reduced, and the box production efficiency is improved. The side panel is immediately dusted after grinding to avoid subsequent side panel skinning defects, which improves The qualified rate of side panel processing is high. In the consolidation process, PVC glue and 3100 yellow glue are applied step by step to ensure the adhesion of the veneer on different materials. The side panel grinding, vacuuming and knife interface trimming processes are set to make the surface of the manufactured box reach the A-level smoothness standard. The PVC glue used is flexible and very suitable for seams, which improves the overall durability and ensures the production quality of the box. The box prepared by this preparation method has anti-drop performance and can be stored at high temperature. The box veneer has good adhesion at different temperatures, especially in high temperature environments.

[0103] The above description has been a detailed description of the present invention. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present application. That is, all equivalent changes and modifications made within the scope of the present application should still fall within the scope of the present invention.

Claims

1. A method for preparing a box body by processing and forming, characterized in that: The preparation method comprises the following steps: Step 1) Laminate the front of the board: Use an automatic laminating machine to apply PVC film to the front of the box board; Step 2) Slotting of the enclosure: Mark the dimensions according to the three views of the box body drawing, start the V-groove cutting machine to cut the V-grooves on the laminated sheets in step 1) to obtain the enclosure; Step 3) Hole drilling on the enclosure: mark the speaker hole positions and installation hole positions and sizes according to the three views of the box body drawing, and use CNC equipment to process the speaker hole positions and installation hole positions; Step 4) Assembly line frame forming: put the grooved enclosures into the assembly line, glue the V-grooves of the enclosures with PVC glue, and fold the enclosures together to form a trapezoidal frame; Step 5) Side panel grinding and dust collection: According to the three views of the box body drawing, cut the bare blank sheet into the left and right panels of the trapezoidal frame, use 240# sandpaper to finely grind the manual grinding areas of the left and right panels, and manually hold an electric grinder to grind the front edges and sharp angles of the left and right panels to eliminate the edges and sharp angles. After grinding, remove dust with a dust removal vacuum cleaner; Step 6) Glue coating and laminating of side panels: Use a glue coating machine to apply PVC glue on the front of the left and right side panels. The amount of PVC glue applied is 58-59g / m 2 , stick the left and right films coated with glue on the left and right panels respectively, and form a layer of PVC skin on the surface of the left and right panels after natural curing; Step 7) Interface edge trimming: Use a blade to trim the corner interfaces of the left and right side panels; Step 8) Box forming process: Apply adhesive to the bevel of the left side of the trapezoidal frame, install the left side plate to the left side of the trapezoidal frame, apply adhesive to the bevel of the right side of the trapezoidal frame, and install the right side plate to the right side of the trapezoidal frame to obtain a trapezoidal box; Step 9) Dust removal of the box: Use an air gun to blow away the dust on the trapezoidal box formed in step 8), and then clean it with an alcohol cloth.

2. The method for preparing a box body by processing and forming according to claim 1, characterized in that: The specific operation process of the front surface coating in step 1) also includes: Step 11) Plate pretreatment: Cut the plate according to the three views of the box body drawing. The thickness of the cut plate is 15-25mm. Dust the cut plate. Step 12) Feeding process: Place the cut sheet in reverse on the sheet feeding guide roller of the automatic coating machine, and load the PVC film onto the PVC unloading guide roller of the automatic coating machine; Step 13) Gluing treatment: The PVC film is sent to the gluing station of the automatic coating machine under the action of the film guide roller, and the gluing station coats the PVC film with glue; Step 14) Coating treatment: The sheet material is sent to the hot pressing guide roller under the conveying action of the feeding guide roller, and at the same time, the PVC film coated with glue is sent to the hot pressing guide roller under the action of the film feeding guide roller. The PVC film is pressed tightly onto the front side of the sheet material by the hot pressing of the hot pressing guide roller to realize sheet pasting.

3. The method for preparing a box body by processing and forming according to claim 1, characterized in that: In step 13), the glue coating station uses a glue coating shaft to apply glue to the PVC film. The glue coating mesh of the glue coating shaft is a 140*55 gravure mesh roller, and the glue coating amount is about 2.2g / m 2 The glue applied on the PVC film is 801D glue, and the thickness of the glue applied is 0.07mm.

4. The method for preparing a box body by processing and forming according to claim 1, characterized in that: In step 14), the hot pressing temperature of the hot pressing guide roller is 70-75° C., and the hot pressing time is 8-10 minutes.

5. The method for preparing a box body by processing and forming according to claim 2, characterized in that: The specific operation process of the assembly line frame forming in step 4) also includes: Step 41) The conveying speed of the assembly line is 1-2 m / min, and the solid content of the PVC glue is ≥ 40%; Step 42) bend the corners of the enclosure grooves to form a trapezoidal frame, use masking tape to fix the assembled trapezoidal frame, let it stand and solidify for 12 hours, then remove the masking tape.

6. The method for preparing a box body by processing and forming according to claim 1, characterized in that: The V-groove opened in step 2) is cut based on the thickness of the plate, leaving a depth of 0.2-0.25mm, and the angle of the V-groove is 45 degrees.

7. The method for preparing a box body by processing and forming according to claim 1, characterized in that: In step 3), the CNC equipment adopts The carbide drill bit is used to process the mounting holes at a speed of 8000rpm, and the speaker holes are processed at a speed of 6000rpm-7000rpm.

8. The method for manufacturing a box body according to claim 1, characterized in that: The suction force of the dust removal vacuum cleaner in step 5) is ≥2000Pa.

9. The method for manufacturing a box body according to claim 1, characterized in that: In step 8), the adhesive applied to the left side bevel of the trapezoidal frame and the adhesive applied to the right side bevel of the trapezoidal frame are both TY-3100D yellow glue.

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