A diaphragm processing device and processing method for improving flatness

Abstract

The present invention relates to the technical field of lithium battery production, and specifically discloses a diaphragm processing device for improving flatness, comprising a heating structure, a flattening structure and a shaping structure; the flattening structure is fixedly arranged in the heating structure, and the shaping structure is fixedly arranged on the right side of the heating structure. According to the present invention, the diaphragm can be guided by the heating structure while being heated and softened, so as to facilitate the processing of uneven parts; the diaphragm with one end size can be stretched and flattened by the flattening structure to correct the uneven parts, and at the same time, the fourth guide roller can fit the third guide roller to fix the diaphragm, so that the diaphragm maintains a certain degree of straightening; the heated diaphragm can be flattened by the shaping structure, and shaped by cooling; and heat can also be provided to a first processing box or a heating table.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to a diaphragm processing device and a processing method for improving flatness. Background Art

[0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as positive / negative electrode material and non-aqueous electrolyte solution; in the structure of lithium battery, the diaphragm is one of the key inner components. The performance of the diaphragm determines the interface structure, internal resistance, etc. of the battery, and directly affects the capacity, cycle and safety performance of the battery. The diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery; however, lithium battery diaphragms are mainly made of polyolefin materials such as polyethylene and polypropylene. During production, the diaphragm will be deformed due to thickness fluctuations, poor flatness, etc., which will affect the subsequent coating and slitting and winding, and severe deformation will directly lead to the scrapping of the diaphragm. Therefore, a diaphragm processing device for improving flatness is designed. Summary of the invention

[0003] The object of the present invention is to provide a diaphragm processing device and a processing method for improving flatness, so as to solve the problem of diaphragm edge collapse, edge curling or unevenness caused by winding and guiding.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a diaphragm processing device for improving flatness, comprising a heating structure, a flattening structure and a shaping structure; the flattening structure is fixedly arranged in the heating structure, and the shaping structure is fixedly arranged on the right side of the heating structure.

[0005] Preferably, the heated structure includes a first processing box, a pair of first guide rollers, a pair of second guide rollers, a pair of third guide rollers, a first box cover, a heating platform and a plurality of electric heating rods; the first processing box is a rectangular box structure, and a first guide port is opened in the middle of the top of the left and right side walls, a first transfer port is opened near the bottom of the left and right side walls of the first processing box, a pair of the first guide rollers are respectively movably embedded in the first guide port, a pair of the second guide rollers are respectively movably embedded between the front and rear side walls of the first processing box, and are respectively located symmetrically between the first guide rollers, and a pair of the first The three guide rollers are respectively movably embedded between the front and rear side walls in the first processing box, and are symmetrically close to the second guide roller. The third guide roller is located above the second guide roller. The first box cover is detachably buckled on the upper wall of the first processing box and fixed by a first bolt. A cavity protrusion is provided in the middle of the first box cover. The heating platform is a cavity structure, and the left and right side walls are both provided with a second adapter. The front and rear side walls of the heating platform are respectively fixedly provided on the front and rear side walls in the first processing box, and are located below the third guide roller. A plurality of the electric heating rods are respectively and equidistantly provided on the upper wall inside the heating platform.

[0006] Preferably, the flattening structure includes a first electric push rod, a connecting frame, a pair of slides, a pair of spiral rods, a pair of motors, two pairs of slides and a pair of fourth guide rollers; one end of the first electric push rod is fixedly arranged on the lower wall of the first box cover and is located in the middle of the raised part; the connecting frame is a door-type frame structure; the connecting frame is fixedly arranged on the telescopic end of the first electric push rod; a pair of slides are respectively fixedly arranged on both ends of the connecting frame and are symmetrical to each other; the slides are respectively parallel to the front and rear side walls of the heating platform; the two ends of the pair of spiral rods are respectively movably embedded in the left and right side walls of the slide; a pair of motors are respectively fixedly arranged The two pairs of slides are respectively provided with reverse spiral holes on the center lines of one end, and one end of the two pairs of slides is respectively movably embedded in the slides and movably sleeved on the spiral rods. The other ends of the two pairs of slides are respectively located below the slides, and the middle parts of the other ends of the slides are respectively embedded with bearings. The diameters of the two fourth guide rollers are respectively the same as those of the third guide rollers. The two pairs of fourth guide rollers are respectively movably embedded between the other ends of the two slides and are relatively fitted. The two pairs of fourth guide rollers are respectively located above the middle part of the heating platform.

[0007] Preferably, the shaping structure includes a second processing box, a pair of sixth guide rollers, a second box cover, a second electric push rod, a cooling table, four pairs of auxiliary connecting rods, a semiconductor refrigeration plate and a pair of fans; the second processing box is a rectangular box structure, and the left and right side walls are both provided with second guide openings corresponding to the first guide openings, the left side wall of the second processing box is provided with a pair of third adapters near the bottom, a pair of the sixth guide rollers are respectively movably embedded in the second guide openings, the second box cover is a convex structure, the second box cover can be detachably buckled on the upper wall of the second processing box, and is fixed by a second bolt, the lower wall of the second box cover is on the same horizontal plane as the upper wall of the sixth guide roller, and one end of the second electric push rod is fixedly arranged on the lower wall inside the second processing box , and is located in the middle, the cooling table is a box structure, and a number of air inlets are equidistantly opened on the front side wall, the cooling table is horizontally fixedly arranged on the second electric push rod, and corresponds to the raised part of the second box cover, a pair of exhaust outlets are arranged on the left side wall of the cooling table, the four pairs of auxiliary connecting rods are a group of arms with the same structure and are relatively connected by pins, and the other two ends of the four pairs of auxiliary connecting rods are respectively movably connected to the lower walls at the left and right ends of the cooling table and the lower wall inside the second processing box, and are respectively located symmetrically on the front and rear sides of the center line, the semiconductor refrigeration plate is fixedly embedded in the cooling table, and the cooling surface is located at the top, the heating surface of the semiconductor refrigeration plate is located in the cooling table, and a pair of fans are respectively fixedly embedded in the exhaust outlets on the left side wall of the cooling table.

[0008] Preferably, the left side wall of the second processing box is fixedly connected to the right side wall of the first processing box, and the third adapter is connected to the first adapter on the right side wall of the first processing box.

[0009] Preferably, the exhaust port can be connected to the third adapter port through the first pipe.

[0010] Preferably, the first adapter port of the first processing box can be connected to the second adapter port through a second pipeline.

[0011] A method for treating a diaphragm treatment device for improving flatness comprises the following steps:

[0012] Step 1: The diaphragm can be guided multiple times by the heating structure to flatten the defective part; Step 2: The part connected with the heating table can be heated by the flattening structure, and then rolled and pushed from the middle to both sides, so that the diaphragm can fully contact and soften with the heating table, thereby achieving a certain degree of improvement in the curling and bending uneven parts; Step 3: The heated and softened diaphragm is guided into the second processing box, and is clamped and flattened with the help of the cooling table and the second box cover, and then cooled by the cooling table to be reshaped.

[0013] The present invention provides a diaphragm processing device and a processing method for improving flatness, which have the following beneficial effects:

[0014] 1. The present invention can guide the diaphragm through the heating structure while raising the temperature to soften it, which is convenient for processing uneven parts;

[0015] 2. The present invention can stretch and flatten the diaphragm at one end through the flattening structure to correct the uneven part. At the same time, the fourth guide roller can fit with the third guide roller to fix the diaphragm, so that the diaphragm can maintain a certain degree of straightening state;

[0016] 3. The present invention can flatten the heated diaphragm through the shaping structure, and shape it by cooling; it can also provide heat to the first processing box or the heating table. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram showing the structure of some uses of the present invention;

[0018] Figure 2 It is a schematic diagram of the assembly structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the split structure of the heating structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the split structure of the flat structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the split structure of the stereotyped structure of the present invention;

[0022] Figure 6 It is a schematic diagram of the partial enlarged structure of A of the present invention;

[0023] Figure 7 It is a schematic diagram of the partial enlarged structure of B of the present invention;

[0024] Figure 8 It is a schematic diagram of the partially enlarged structure of location C of the present invention.

[0025] In the figure: 1. heating structure; 11. first processing box; 12. first guide roller; 13. second guide roller; 14. third guide roller; 15. first box cover; 16. heating table; 17. electric heating rod; 2. flattening structure; 21. first electric push rod; 22. connecting frame; 23. slide; 24. screw rod; 25. motor; 26. slide; 27. fourth guide roller; 3. shaping structure; 31. second processing box; 32. sixth guide roller; 33. second box cover; 34. second electric push rod; 35. cooling table; 36. auxiliary connecting rod; 37. semiconductor cooling plate; 38. fan. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-8 The present invention provides a technical solution: a diaphragm processing device for improving flatness, comprising a heated structure 1, a flattening structure 2 and a shaping structure 3; the flattening structure 2 is fixedly arranged in the heated structure 1, and the shaping structure 3 is fixedly arranged on the right side of the heated structure 1.

[0028] As a preferred solution, further, the heated structure 1 includes a first processing box 11, a pair of first guide rollers 12, a pair of second guide rollers 13, a pair of third guide rollers 14, a first box cover 15, a heating platform 16 and a plurality of electric heating rods 17; the first processing box 11 is a rectangular box structure, and a first guide port is opened in the middle of the top of the left and right side walls, and a first transfer port is opened near the bottom of the left and right side walls of the first processing box 11, a pair of the first guide rollers 12 are respectively movably embedded in the first guide port, a pair of the second guide rollers 13 are respectively movably embedded between the front and rear side walls of the first processing box 11, and are respectively located symmetrically between the first guide rollers 12, and a pair of The third guide roller 14 is movably embedded between the front and rear side walls of the first processing box 11, and is symmetrically close to the second guide roller 13. The third guide roller 14 is located above the second guide roller 13. The first box cover 15 is detachably buckled on the upper wall of the first processing box 11 and fixed by a first bolt. A cavity protrusion is provided in the middle of the first box cover 15. The heating platform 16 is a cavity structure, and the left and right side walls are both provided with a second adapter. The front and rear side walls of the heating platform 16 are fixedly provided on the front and rear side walls of the first processing box 11, and are located below the third guide roller 14. A plurality of electric heating rods 17 are equidistantly provided on the inner upper wall of the heating platform 16.

[0029] As a preferred solution, further, the flattening structure 2 includes a first electric push rod 21, a connecting frame 22, a pair of slides 23, a pair of spiral rods 24, a pair of motors 25, two pairs of slides 26 and a pair of fourth guide rollers 27; one end of the first electric push rod 21 is fixedly arranged on the lower wall of the first box cover 15, and is located in the middle of the raised part, the connecting frame 22 is a door-type frame structure, the connecting frame 22 is fixedly arranged on the telescopic end of the first electric push rod 21, a pair of the slides 23 are respectively fixedly arranged on both ends of the connecting frame 22, and are symmetrical to each other, the slides 23 are respectively parallel to the front and rear side walls of the heating platform 16, the two ends of the pair of spiral rods 24 are respectively movably embedded in the left and right side walls of the slide 23, and a pair of the motors 2 5 are respectively fixed on the right end of the slide 23, and the driving end of the motor 25 is respectively movably embedded in the right side wall of the slide 23 and fixedly connected to one end of the spiral rod 24. The two pairs of slides 26 are provided with reverse spiral holes near the center line of one end. One end of the two pairs of slides 26 is respectively movably embedded in the slide 23 and movably sleeved on the spiral rod 24. The other ends of the two pairs of slides 26 are respectively located below the slide 23, and the middle part of the other end of the slide 26 is embedded with a bearing. The pair of fourth guide rollers 27 have the same diameter as the third guide roller 14, and the pair of fourth guide rollers 27 are respectively movably embedded between the other ends of the two slides 26 and relatively fit. The pair of fourth guide rollers 27 are respectively located above the middle of the heating platform 16.

[0030] As a preferred embodiment, further, the shaping structure 3 includes a second processing box 31, a pair of sixth guide rollers 32, a second box cover 33, a second electric push rod 34, a cooling table 35, four pairs of auxiliary connecting rods 36, a semiconductor refrigeration plate 37 and a pair of fans 38; the second processing box 31 is a rectangular box structure, and the left and right side walls are both provided with second guide openings corresponding to the first guide openings, the left side wall of the second processing box 31 is provided with a pair of third adapters near the bottom, a pair of the sixth guide rollers 32 are respectively movably embedded in the second guide openings, the second box cover 33 is a convex structure, the second box cover 33 can be detachably buckled on the upper wall of the second processing box 31, and is fixed by a second bolt, the lower wall of the second box cover 33 and the upper wall of the sixth guide roller 32 are on the same horizontal plane, and one end of the second electric push rod 34 is fixedly arranged at the second place The cooling platform 35 is a box structure, and a plurality of air inlets are equidistantly provided on the front side wall. The cooling platform 35 is horizontally fixed on the second electric push rod 34, and corresponds to the raised part of the second box cover 33. A pair of exhaust outlets are provided on the left side wall of the cooling platform 35. The four pairs of auxiliary connecting rods 36 are a group of arms with the same structure and are relatively connected by pins. The other two ends of the four pairs of auxiliary connecting rods 36 are respectively movably connected to the lower walls on the left and right ends of the cooling platform 35 and the lower wall of the second processing box 31, and are respectively located symmetrically on the front and rear sides of the center line. The semiconductor refrigeration plate 37 is fixedly embedded in the cooling platform 35, and the cooling surface is located at the top. The heating surface of the semiconductor refrigeration plate 37 is located in the cooling platform 35. A pair of fans 38 are respectively fixedly embedded in the exhaust outlets on the left side wall of the cooling platform 35.

[0031] As a preferred solution, further, the left side wall of the second processing box 31 is fixedly connected to the right side wall of the first processing box 11, and the third adapter is connected to the first adapter on the right side wall of the first processing box 11 for ventilation and transmission requirements.

[0032] As a preferred solution, further, the exhaust port can be connected to the third adapter through the first pipe, so as to transfer the heat of the heating end of the semiconductor refrigeration plate 37 to the first processing box 11.

[0033] As a preferred solution, further, the first adapter of the first processing box 11 can be connected to the second adapter through a second pipe, which is used to transfer the heat of the heating end of the semiconductor refrigeration plate 37 to the heating platform 16, saving energy consumption of the electric heating rod 17.

[0034] According to the instruction manual Figure 1-8 It can be seen that a processing method for a diaphragm processing device for improving flatness includes the following steps:

[0035] First, the membrane passes through the first treatment box 11 and the second treatment box 31 in the following manner. Figure 1As shown;

[0036] Step (1), the diaphragm enters from above the first guide roller 12 on the left side wall of the first processing box 11 in the heating structure 1, then obliquely passes downward around the bottom of the second guide roller 13 at the left end, then passes through the left side wall of the third guide roller 14 at the left end to the top of the third guide roller 14, and is horizontally transported to the right through the tops of the two third guide rollers 14;

[0037] Then, after passing under the third guide roller 14 on the right side, that is, passing under the second guide roller 13 on the right end, it is guided obliquely to the upper right, and can pass through the first guide roller 12 on the right end of the first processing box 11. Then, the diaphragm can horizontally pass through the upper wall of the sixth guide roller 32 on the left and right side walls of the second processing box 31 to horizontally penetrate the second processing box 31. After the guiding is completed, the diaphragm passing through the second processing box 31 can be connected to the winding device of the existing equipment;

[0038] Step (2), the part to be processed is moved between the two third guide rollers 14, and the first electric push rod on the lower wall of the first box cover 15 in the flattening structure 2 is extended and driven to lower the slide 23 on the connecting frame 22, so that the two fourth guide rollers 27 are located in the middle of the third guide rollers 14, and the diaphragm is pressed onto the heating table 16;

[0039] Step (3), control the electric heating rod 17 in the heating platform 16 to increase the temperature to control the temperature of the wall surface of the heating platform 16, and then after the diaphragm is pressed together with the fourth guide roller 27, drive the motor 25 on the funny to control the rotation of the screw rod 24, so that the two pairs of slide seats 26 are forced to move toward each other, driving the fourth guide roller 27 to separate and move and roll to the left and right sides; thereby, the diaphragm can be rolled, heated and pushed to be straightened; after the fourth guide roller 27 moves to fit with the third guide roller 14, the diaphragm is clamped and fixed, and the diaphragm between the third guide rollers 14 cannot move, so that heating and flat pulling can be achieved, which can improve the repair to a certain extent;

[0040] Step (4), then by resetting the flattening structure 2, the existing winding device is driven to continue to transport and move the diaphragm, and when the heated part enters the second processing box 31; by controlling the extension drive of the second electric push rod 34 in the shaping structure 3, the cooling table 35 is driven to rise, and the diaphragm is clamped between the second box cover 33;

[0041] Step (5), driving the semiconductor cooling sheet 37 to work, so that the cooling stage 35 and the contact wall of the diaphragm are cooled, and the diaphragm in the pressed and flattened state is cooled and shaped, so that the curling, protrusion or bending parts are corrected; during the driving of the shaping structure 3, since the last processed diaphragm part is fixed by clamping, the diaphragm that is again located between the third guide rollers 14 can be repaired again by the flattening structure 2;

[0042] Step (6), with the semiconductor cooling plate 37 driven, the temperature of the heating surface will be in the cooling table 35, so in order to ensure the energy heating and cooling effect, the fan 38 can be driven to transfer the heat to the first processing box 11; the wind enters from the air inlet and is discharged from the exhaust port; if the heat is directly transferred to the first processing box 11, the diaphragm can be preheated and the heat can be kept softened after being heated; the heat can also be transferred to the heating table 16 through the pipeline to reduce the energy consumption and heat loss of the electric heating rod 17.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diaphragm processing device for improving flatness, characterized in that: It comprises a heating structure (1), a flat structure (2) and a shaping structure (3); the flat structure (2) is fixedly arranged in the heating structure (1), and the shaping structure (3) is fixedly arranged on the right side of the heating structure (1); The heating structure (1) comprises a first processing box (11), a pair of first guide rollers (12), a pair of second guide rollers (13), a pair of third guide rollers (14), a first box cover (15), a heating platform (16) and a plurality of electric heating rods (17); The first processing box (11) is a rectangular box structure, and a first guide opening is opened in the middle of the top of the left and right side walls, and a first transfer interface is opened near the bottom of the left and right side walls of the first processing box (11). A pair of the first guide rollers (12) are respectively movably embedded in the first guide openings, a pair of the second guide rollers (13) are respectively movably embedded between the front and rear side walls of the first processing box (11), and are respectively symmetrically located between the first guide rollers (12), and a pair of the third guide rollers (14) are respectively movably embedded between the front and rear side walls of the first processing box (11), and are respectively close to the second guide rollers (13). ) are symmetrical, the third guide roller (14) is located above the second guide roller (13), the first box cover (15) is detachably buckled on the upper wall of the first processing box (11) and fixed by a first bolt, a hollow protrusion is provided in the middle of the first box cover (15), the heating platform (16) is a hollow structure, and the left and right side walls are both provided with a second adapter, the front and rear side walls of the heating platform (16) are respectively fixedly arranged on the front and rear side walls inside the first processing box (11) and are located below the third guide roller (14), and a plurality of the electric heating rods (17) are respectively equidistantly arranged on the upper wall inside the heating platform (16); The flattening structure (2) comprises a first electric push rod (21), a connecting frame (22), a pair of slide frames (23), a pair of screw rods (24), a pair of motors (25), two pairs of slide seats (26) and a pair of fourth guide rollers (27); One end of the first electric push rod (21) is fixedly arranged on the lower wall of the first box cover (15) and is located in the middle of the raised part. The connecting frame (22) is a door-shaped frame structure. The connecting frame (22) is fixedly arranged on the telescopic end of the first electric push rod (21). A pair of slides (23) are respectively fixedly arranged on both ends of the connecting frame (22). The slides (23) are respectively parallel to the front and rear side walls of the heating platform (16). Both ends of a pair of spiral rods (24) are respectively movably embedded in the left and right side walls of the slides (23). A pair of motors (25) are respectively fixedly arranged on the right ends of the slides (23), and the driving ends of the motors (25) are respectively movably embedded in the right side walls of the slides (23). and fixedly connected to one end of the spiral rod (24); the two pairs of slide seats (26) are provided with reverse spiral holes near the center line of one end; one end of the two pairs of slide seats (26) are respectively movably embedded in the slide frame (23) and are respectively movably sleeved on the spiral rod (24); the other ends of the two pairs of slide seats (26) are respectively located below the slide frame (23); and a bearing is respectively embedded in the middle of the other end of the slide seat (26); the pair of fourth guide rollers (27) have the same diameter as the third guide roller (14); the pair of fourth guide rollers (27) are respectively movably embedded between the other ends of the two slide seats (26) and are relatively fitted; and the pair of fourth guide rollers (27) are respectively located above the middle of the heating platform (16); The shaping structure (3) comprises a second processing box (31), a pair of sixth guide rollers (32), a second box cover (33), a second electric push rod (34), a cooling table (35), four pairs of auxiliary connecting rods (36), a semiconductor cooling sheet (37) and a pair of fans (38); The second processing box (31) is a rectangular box structure, and the left and right side walls are each provided with a second guide opening corresponding to the first guide opening. The left side wall of the second processing box (31) is provided with a pair of third transfer ports near the bottom. The pair of the sixth guide rollers (32) are respectively movably embedded in the second guide openings. The second box cover (33) is a convex structure. The second box cover (33) is detachably buckled on the upper wall of the second processing box (31) and fixed by a second bolt. The lower wall of the second box cover (33) and the upper wall of the sixth guide roller (32) are on the same horizontal plane. One end of the second electric push rod (34) is fixedly arranged on the lower wall of the second processing box (31). The cooling table (35) is a box structure, and the front side wall is provided with a plurality of air inlets at equal intervals. The cooling table (35) is 5) It is horizontally fixed on the second electric push rod (34) and corresponds to the raised part of the second box cover (33). A pair of exhaust ports are arranged on the left side wall of the cooling platform (35). The four pairs of auxiliary connecting rods (36) are a group of arms with the same structure and are relatively connected by a pin shaft. The other two ends of the four pairs of auxiliary connecting rods (36) are movably connected to the lower walls at the left and right ends of the cooling platform (35) and the lower wall inside the second processing box (31), and are respectively located symmetrically on the front and rear sides of the center line. The semiconductor cooling plate (37) is fixedly embedded in the cooling platform (35) with the cooling surface located at the top. The heating surface of the semiconductor cooling plate (37) is located in the cooling platform (35). A pair of fans (38) are respectively fixedly embedded in the exhaust ports on the left side wall of the cooling platform (35).

2. A diaphragm processing device for improving flatness according to claim 1, characterized in that: The left side wall of the second processing box (31) is fixedly connected to the right side wall of the first processing box (11), and the third adapter is connected to the first adapter on the right side wall of the first processing box (11).

3. A diaphragm processing device for improving flatness according to claim 2, characterized in that: The air outlet can be connected to the third adapter through the first pipe.

4. A diaphragm processing device for improving flatness according to claim 3, characterized in that: The first adapter port of the first processing box (11) can be connected to the second adapter port via a second pipeline.

5. A method for treating a diaphragm treatment device for improving flatness according to claim 4, characterized in that: The following steps are involved: Step 1: The diaphragm can be guided multiple times by the heated structure (1) to flatten the defective part; Step 2: The flattening structure (2) is used to heat the portion where the portion is connected to the heating platform (16), and then rolling and pushing the portion from the middle to both sides, so that the diaphragm can fully contact and soften with the heating platform (16), thereby achieving a certain degree of improvement in the curling and bending uneven portions; Step 3: The heated and softened diaphragm is guided into the second processing box (31), and is clamped and flattened by means of a cooling table (35) and a second box cover (33), and then cooled by the cooling table (35) to be reshaped.

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