Axially rotating sealing knife assembly and assembly and sealing method

Abstract

The present invention discloses an axially rotating sealing knife assembly and an assembly and sealing method, which belongs to the technical field of carrier tape packaging. The present invention discloses an axially rotating sealing knife assembly and an assembly and sealing method, comprising a base one, a base two and a sealing knife component, wherein the sealing knife component is installed in the length direction on the base two, and a pin is penetrated through the sealing knife component and the base two in a horizontal and parallel manner, and the bottom surface of the sealing knife component is not completely in contact with the base two, and a cylindrical coupling column is arranged in the middle of the lower surface of the base two along the length direction; a cylindrical coupling groove is arranged in the middle of the upper surface of the base one along the length direction, and the coupling column is fitted into the coupling groove, and the bottom plane of the base two is higher than the top plane of the base one, thereby solving the problems of inconsistent thickness between the A side and the B side of the carrier tape, and poor sealing caused by intermittent thickness on one side; if the AB side of the carrier tape is uneven or has different thickness, the next knife needs to be compensated, and this sealing knife component will automatically make corrections.

Description

Technical Field

[0001] The invention relates to the technical field of carrier tape packaging, and more particularly to an axially rotating sealing knife assembly and an assembling and sealing method. Background Art

[0002] A carrier tape is a continuous strip container used in the electronics industry to hold small electronic components. Most of them are made of PS, PC or other plastic materials and are used to package electronic components, such as LEDs, capacitors, inductors, resistors, etc. Batch packaging with a carrier tape can prevent static electricity, protect electronic components, and achieve high-speed SMT surface mounting welding of chip electronic components. When packaging a carrier tape, usually after placing electronic parts in several grooves of the carrier tape, the cover tape is combined with the surface of the carrier tape by heat sealing to achieve the purpose of sealing the grooves. In order to allow subsequent users to have a certain degree of convenience when peeling off the cover tape, it is usually sealed with a heat sealing knife on both sides of the groove according to the direction in which the carrier tape and the cover tape extend, so that the electronic parts can be fixed in the groove of the carrier tape by the sealed cover tape.

[0003] At present, the sealing anvils on the sealing equipment of the production line are fixed and cannot be moved. Figure 1 As shown, the corresponding sealing knife is integrated and fixed and cannot move in the sealing state. When the thickness of the A side and the B side of the carrier tape (i.e., the two long sides of the carrier tape that are sealed) are inconsistent or there is a gap in thickness on one side, it is easy to cause problems such as poor sealing.

[0004] For example, the Chinese patent with application publication number: CN107499607A and application publication date: December 22, 2017, has made corresponding improvements to the problem of poor sealing caused by factors such as sealing knife and substrate, and disclosed an automatic anti-detachment independent movable sealing knife, including a sealing knife, when the blade of the sealing knife is pressed down, soft pressure is applied to the cover tape and the carrier tape to avoid the sealing knife and the cover tape and the carrier tape from being too hard in contact, thereby achieving the technical effect of uniform and tight sealing. This patent improves the original one-piece sealing knife and the cover tape and the carrier tape from being too hard in contact to the soft pressure of the split sealing knife, so as to achieve the purpose of soft pressure and static pressure required for sealing. In the actual sealing process, the thickness of the AB side of the carrier tape will not be absolutely the same in theory. Therefore, simply changing the one-piece sealing knife and the cover tape and the carrier tape from being too hard in contact to the soft pressure of the split sealing knife cannot achieve the effect of automatic sealing compensation. Summary of the invention

[0005] 1. Technical problem to be solved by the invention

[0006] In view of the problems that the thickness of the A and B sides of the carrier tape are not absolutely the same during the sealing process of the prior art, the original sealing knife and the anvil cannot be compensated, and poor sealing occurs, the present invention provides an axially rotating sealing knife assembly and an assembly and sealing method. A set of sealing knife components that can rotate independently around the X axis and rotate overall around the Y axis is designed to solve the problem of uneven thickness on the A and B sides of the carrier tape and intermittent thickness on one side causing poor sealing.

[0007] 2. Technical solution

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] An axially rotating sealing knife assembly comprises a base one, a base two and a sealing knife component, wherein the sealing knife component is installed on the base two in the length direction, a pin is horizontally penetrated between the sealing knife component and the base two, and the bottom surface of the sealing knife component is not completely in contact with the base two, a cylindrical coupling column is arranged in the middle of the lower surface of the base two along the length direction; a cylindrical coupling groove is arranged in the middle of the upper surface of the base one along the length direction, the coupling column is fitted into the coupling groove, and the bottom plane of the base two is higher than the top plane of the base one.

[0010] A further technical solution is that the upper part of the base 2 is provided with convex strips along the length direction, and the convex strips include convex strip II in the middle and convex strips I on both sides of convex strip II, and an installation groove for installing the sealing knife component is formed between each two adjacent convex strips, and the sealing knife component is installed in the installation groove.

[0011] A further technical solution is that the knife sealing component includes a knife seat, a knife edge and a knife back. The top of the knife seat is an inclined knife edge, and the side of the knife seat opposite to the knife edge is the knife back, and the knife back and the top of the knife edge form a rectangular knife tip; the outer surface of the knife seat contacts the inner surface of the convex strip I, and the knife back is embedded in the installation groove facing the convex strip II, and the bottom of the knife sealing component is chamfered to achieve that two independent knife sealing components can be relatively installed in the installation groove between the convex strips and avoid wear between the bottom of the knife sealing component and the installation groove; a through hole II is opened in the middle of the knife seat towards the knife back.

[0012] A further technical solution is that the convex strip is provided with a through hole I along the width direction, the through hole I corresponds to the through hole II, and pins are installed in the through holes I and II; a positioning groove is provided on the outer peripheral surface of the middle part of the pin, and a fixing groove is provided in the middle part of the coupling column, and the positioning groove corresponds to the position of the fixing groove; a threaded hole II is vertically provided in the middle part of the fixing groove, and a screw II is adaptively connected inside the threaded hole II, and the screw II is connected to the through hole I in the convex strip II to fix the pin.

[0013] According to a further technical solution, bosses are respectively arranged on both sides of the coupling groove on the base one, and the width of the base two is greater than the width of the bosses.

[0014] A further technical solution is that the base two is slightly shorter than the base one, and elastic gaskets are fixedly installed on the end faces at both ends of the length direction of the base two by screws I, threaded holes I are provided on the end faces at both ends of the convex strip II of the base two, and matching threaded nails I are provided in the threaded holes I, and elastic gaskets with corresponding through holes III are provided between the outer ends of the threaded nails I and the end faces of the convex strip II, and the elastic gaskets are tightly attached to the end faces at both ends of the length direction of the base one at the same time to ensure suitable sliding friction, and when the base two rotates, the elastic gasket acts as a damper to prevent the base two from loosening and randomly shaking and rotating, so as to avoid affecting the offset of the knife marks after sealing.

[0015] A further technical solution is a method for assembling an axially rotating sealing knife assembly, the steps of which are:

[0016] Step 1: Sealing knife assembly: face the knife backs of the two sealing knife components and vertically insert them into the installation groove formed between two adjacent convex strips;

[0017] Step 2, fixing the sealing knife: after the sealing knife component is inserted, a pin is coaxially inserted into the through hole I on the convex strip and the through hole II on the sealing knife component, and a screw II is screwed in from the bottom of the base II for fixing;

[0018] Step 3: Fix the base 2: insert the coupling column of the base 2 into the coupling groove of the base 1;

[0019] Step 4: Assemble the sealing knife assembly: Assemble the entire axially rotating sealing knife assembly on the machine table through the fixing groove.

[0020] Furthermore, between step three and step four, damping assembly is performed, that is, the elastic gasket is fixed to the front and rear end surfaces of the base two by screws I, and is close to the base one.

[0021] A further technical solution is a sealing method of an axially rotating sealing knife assembly, the steps of which are:

[0022] Step 1: Press the sealing knife downward: After the cover tape and the carrier tape run under the sealing groove between the sealing knife components, the entire sealing knife is pressed downward in parallel under the drive of the cylinder;

[0023] Step 2: Automatic adjustment of sealing knife: When the substrate running the cover tape and carrier tape is unbalanced front and back, the two independent sealing knives in the sealing knife component rotate a small angle around the pin in the X direction; and rotate a small angle around the axis of the coupling column in the Y direction, so that the two sealing knives can rotate a small angle in the X and Y directions at the same time after being installed on the base;

[0024] Step 3: Automatic correction of the sealing knife component: The elastic gasket is tightly attached to the two side surfaces of the base one to ensure appropriate sliding friction, which plays a damping role when the base two rotates, always maintaining the sealing state of the previous knife. If the next knife needs compensation due to uneven AB sides of the carrier or different thicknesses, this sealing knife component will automatically correct the angle.

[0025] 3. Beneficial effects

[0026] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0027] (1) An axially rotating sealing knife assembly and assembly and sealing method of the present invention, wherein the coupling column is coupled to the coupling groove of the base one, and the bottom plane of the base two is higher than the top plane of the base one, so that the base two can rotate slightly around the axis of the coupling column;

[0028] (2) An axially rotating sealing knife assembly and assembly and sealing method of the present invention, wherein the upper portion of the base 2 is provided with a convex strip along the length direction, and a mounting groove capable of mounting the sealing knife component is formed between the two convex strips;

[0029] (3) An axially rotating sealing knife assembly and assembly and sealing method of the present invention, wherein a through hole II is coaxially opened in the middle of the knife seat corresponding to the position of through hole I, so as to ensure that the two independent sealing knives in the sealing knife assembly can be fixedly connected to the base II;

[0030] (4) An axially rotating sealing knife assembly and assembly and sealing method of the present invention, wherein the positioning groove corresponds to the position of the fixing groove, and the screw II is used to fix the pin;

[0031] (5) An axially rotating sealing knife assembly and an assembly and sealing method of the present invention, wherein the pin forms a gap between the bottom of the sealing knife and the mounting groove, thereby enabling the sealing knife to rotate slightly around the pin;

[0032] (6) The present invention provides an axially rotating sealing knife assembly and an assembly and sealing method. The principle that the base 2 is slightly shorter than the base 1 is used. Two elastic gaskets are respectively installed on the end faces of the two ends of the base 2 in the length direction and fixed with screws I. The elastic gaskets play a damping role to prevent the base 2 from loosening and randomly shaking and rotating, so as not to affect the knife marks after sealing. The shorter the base 2 is than the base 1, the greater the friction force;

[0033] (7) The present invention provides an axially rotating sealing knife assembly and an assembly and sealing method, wherein the elastic gasket is tightly attached to the two side surfaces of the base one, and acts as a damper when the base two rotates, so as to always maintain the sealing state of the previous knife. If the next knife needs to be compensated due to unevenness or inconsistent thickness of the AB side of the carrier, the sealing knife component will automatically make an angle correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the integrated knife sealing structure of the prior art;

[0035] Figure 2 It is a schematic diagram of the general assembly structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the base second assembly sealing knife structure of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the second base of the present invention;

[0038] Figure 5 It is a bottom view structural diagram of the base 2 of the present invention;

[0039] Figure 6 It is a schematic diagram of the structure of a base of the present invention;

[0040] Figure 7 It is a schematic diagram of the improved knife sealing structure of the present invention;

[0041] Figure 8 It is a schematic diagram of the elastic gasket structure of the present invention;

[0042] Fig. 9 It is a schematic diagram of the structure of the special pin for the base of the present invention.

[0043] In the figure: 1-base 1; 2-base 2; 3-knife sealing component; 4-pin; 5-elastic gasket; 6-screw Ⅰ; 11-boss; 12-coupling groove; 13-fixing groove; 20-installing groove; 21-convex strip Ⅰ; 22-convex strip Ⅱ; 23-coupling column; 24-threaded hole Ⅰ; 25-fixing groove; 26-threaded hole Ⅱ; 27-screw Ⅱ; 28-through hole Ⅰ; 31-knife seat; 32-knife edge; 33-knife back; 34-through hole Ⅱ; 41-positioning groove; 51-through hole Ⅲ. DETAILED DESCRIPTION

[0044] In order to further understand the content of the present invention, the invention is described in detail with reference to the accompanying drawings.

[0045] Example 1

[0046] This embodiment is an axially rotating sealing knife assembly, such as Figure 2As shown, it includes a base 1, a base 2 and a sealing knife component 3, the sealing knife component 3 is installed on the base 2 in the length direction, the sealing knife component 3 is penetrated by a pin 4 in a horizontal and parallel manner with the base 2, and the bottom surface of the sealing knife component 3 is not completely in contact with the base 2, so that the sealing knife component 3 can rotate around the pin 4 at a small angle; a cylindrical coupling column 23 is arranged in the middle of the lower surface of the base 2 along the length direction; a cylindrical coupling groove 12 is arranged in the middle of the upper surface of the base 1 along the length direction, and the coupling column 23 is fitted into the coupling groove 12 to realize the active connection between the base 1 and the base 2, and the bottom plane of the base 2 is higher than the top plane of the base 1, so that the sealing knife component 3 can rotate around the axis of the coupling column 23 at a small angle.

[0047] Example 2

[0048] The present embodiment is an axially rotating sealing knife assembly, the basic structure of which is the same as that of the first embodiment, except that: Figure 4 , 5 As shown, the upper part of the base 2 is provided with convex strips along the length direction, and the convex strips include convex strips II 22 in the middle and convex strips I 21 on both sides of the convex strips II 22. An installation groove 20 for installing the sealing knife component 3 is formed between each two adjacent convex strips, and the packaging component 3 is installed in the installation groove 20; Figure 7 As shown, the sealing knife component 3 includes a knife seat 31, a knife edge 32 and a knife back 33. The knife seat 31 has an inclined knife edge 32 on its upper side, and the side of the knife seat 31 opposite to the knife edge 32 is the knife back 33. The knife back 33 and the top of the knife edge 32 form a rectangular knife tip; the outer surface of the knife seat 31 contacts the inner surface of the convex strip I21, and the knife back 33 is embedded in the mounting groove 20 toward the convex strip II22, and the bottom of the sealing knife is chamfered to enable two independent sealing knife components 3 to be relatively installed in the mounting groove 20 between the convex strips, and to avoid wear of the bottom of the sealing knife and the mounting groove 20; a through hole II34 is opened in the middle of the knife seat 31 toward the knife back; Figure 3 As shown, the convex strip is provided with a through hole I28 along the width direction, the through hole I28 corresponds to the through hole II34, and the through hole I28 and the through hole II34 are penetrated by a pin 4; a positioning groove 41 is provided on the outer peripheral surface of the middle part of the pin 4, and a fixing groove 25 is provided in the middle part of the coupling column 23, and the positioning groove 41 corresponds to the position of the fixing groove 25; a threaded hole II26 is vertically provided in the middle part of the fixing groove 25, and a screw II27 is adaptively connected inside the threaded hole II26, and the screw II27 is connected to the through hole I28 in the convex strip II22 to fix the pin 4.

[0049] Example 3

[0050] The present embodiment is an axially rotating sealing knife assembly, the basic structure of which is the same as that of the embodiment 2, except that: Figure 6As shown, on the base 1, bosses 11 are respectively provided on both sides of the coupling groove 12. Without changing the assembly dimensions of the base 1 and the sealing machine, the bosses 11 increase the depth of the cylindrical coupling groove, thereby increasing the connection stability between the base 1 and the base 2 2 by increasing the fitting depth of the coupling column 23.

[0051] Example 4

[0052] The present embodiment is an axially rotating sealing knife assembly, the basic structure of which is the same as that of the embodiment 3, except that: Figure 2 , 8 As shown, the base 2 2 is slightly shorter than the base 1 , and threaded holes Ⅰ24 are provided on the end faces of both ends of the convex strip II22 of the base 2 2 , and matching screws Ⅰ6 are provided in the threaded holes Ⅰ24 , and elastic gaskets 5 with corresponding through holes are provided between the outer ends of the screws Ⅰ6 and the end faces of the convex strip II22 , and the elastic gaskets 5 are tightly attached to the two end faces of the base 1 in the length direction at the same time to ensure appropriate sliding friction. When the base 2 2 rotates, the elastic gaskets 5 play a damping role to prevent the base 2 2 from loosening and randomly shaking and rotating, so as not to affect the deviation of the knife marks after sealing; the elastic gasket 5 is provided with a through hole Ⅲ51 matching the screw Ⅰ6; the elastic gasket 5 can select a square elastic gasket.

[0053] Example 5

[0054] The embodiment of the present invention further provides an assembly method of an axially rotating sealing knife assembly, the steps of which are as follows:

[0055] Step 1: Sealing knife assembly: the knife backs 33 of the two sealing knife components 3 are placed opposite to each other and vertically inserted into the mounting groove 20 formed between two adjacent convex strips;

[0056] Step 2, fixing the sealing knife: After the sealing knife component 3 is inserted, the pin 4 is coaxially inserted along the through hole Ⅰ28 on the convex strip and the through hole Ⅱ34 on the sealing knife component 3, and the screw Ⅱ27 is screwed in from the bottom of the base 2 2 for fixing;

[0057] Step 3: Fix the base 2: insert the coupling column 23 of the base 2 into the coupling groove 12 of the base 1;

[0058] Step 4: Assembling the sealing knife assembly: Assemble the entire axially rotating sealing knife assembly on the machine table through the fixing groove 13;

[0059] Furthermore, between step three and step four, damping assembly is performed, that is, the elastic gasket 5 is fixed to the front and rear end surfaces of the base two 2 by screws I6 and is tightly attached to the base one 1.

[0060] Example 6

[0061] The embodiment of the present invention further provides a sealing method of an axially rotating sealing knife assembly, the steps of which are:

[0062] Step 1: Pressing the sealing knife downward: After the cover tape and the carrier tape run under the sealing groove between the sealing knife components 3, the entire sealing knife is pressed downward in parallel under the drive of the cylinder;

[0063] Step 2, automatic adjustment of the sealing knife: When the substrates running the cover tape and the carrier tape are unbalanced front and back, the two independent sealing knives in the sealing knife component 3 rotate at a small angle around the pin 4 in the X direction; and rotate at a small angle around the axis of the coupling column 23 in the Y direction, so that the two sealing knives are loaded on the base and rotate at a small angle in the X and Y directions at the same time;

[0064] Step 3, automatic correction of the sealing knife component 3: the elastic gasket 5 is tightly attached to the two sides of the base 1 to ensure appropriate sliding friction, and plays a damping role when the base 2 rotates, always maintaining the sealing state of the previous knife. If the next knife needs to be compensated due to unevenness or different thickness of the carrier AB side, the sealing knife component 3 will automatically correct the angle;

[0065] Utilizing the principle that base 2 is slightly shorter than base 1, two elastic gaskets 5 are installed at both ends of base 2 and fixed with screws 16. In this way, since base 2 is slightly shorter than base 1, thinner elastic gaskets 5 can be used to fit tightly against the side of base 1 and generate moderate friction (the shorter base 2 is than base 1, the greater the friction). When the pressure generated by the sealing knife component 3 when pressed down is turned to the Y direction and the force generated by the pressure turned to the Y direction is much greater than the sliding friction between the elastic gaskets 5, the coupling column 23 will actively rotate and correct so that the forces exerted on the carrier by the front and rear sealing knives are almost the same, thereby ensuring good sealing.

[0066] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. An axially rotating sealing knife assembly, comprising a base 1 (1), a base 2 (2) and a sealing knife component (3), Features: A sealing knife component (3) is installed on the base 2 (2) along its length direction, a pin (4) is transversely penetrated between the sealing knife component (3) and the middle of the base 2 (2), and a gap is left between the bottom surface of the sealing knife component (3) and the base 2 (2), a cylindrical coupling column (23) is arranged in the middle of the lower surface of the base 2 (2) along the length direction, and a cylindrical coupling groove (12) is arranged in the middle of the upper surface of the base 1 (1) along the length direction, the coupling column (23) is located in the coupling groove (12), and the bottom plane of the base 2 (2) is higher than the top plane of the base 1 (1); The upper portion of the base 2 (2) is provided with convex strips along the length direction, the convex strips comprising a convex strip II (22) in the middle and convex strips I (21) on both sides of the convex strip II (22), and a mounting groove (20) for mounting the sealing knife component (3) is formed between each two adjacent convex strips, and the sealing knife component (3) is mounted in the mounting groove (20); Bosses (11) are respectively provided on both sides of the coupling groove (12) on the base one (1); The knife sealing component (3) comprises a knife seat (31), a knife edge (32) and a knife back (33); the knife seat (31) has an inclined knife edge (32) above it; the side of the knife seat (31) opposite to the knife edge (32) is the knife back (33); the knife back (33) and the top of the knife edge (32) form a rectangular knife tip; the outer surface of the knife seat (31) contacts the inner surface of the convex strip I (21); the knife back (33) faces the convex strip II (22) and is embedded in the mounting groove (20); a through hole II (34) is provided in the middle of the knife seat (31) in the direction of the knife back (33); The convex strip is provided with a through hole I (28) along the width direction, the through hole I (28) corresponds to the through hole II (34), and a pin (4) is inserted into the through hole I (28) and the through hole II (34); a positioning groove (41) is provided on the outer peripheral surface of the middle part of the pin (4), and a fixing groove (25) is provided in the middle part of the coupling column (23), and the positioning groove (41) corresponds to the position of the fixing groove (25); a threaded hole II (26) is vertically provided in the middle part of the fixing groove (25), and a screw II (27) is adaptively connected inside the threaded hole II (26), and the screw II (27) is connected to the through hole I (28) in the convex strip II (22) and contacts the pin (4); The base 2 (2) is slightly shorter than the base 1 (1), and threaded holes Ⅰ (24) are provided on both end surfaces of the convex strip Ⅱ (22) of the base 2 (2), and matching screws Ⅰ (6) are provided in the threaded holes Ⅰ (24). An elastic gasket (5) with a corresponding through hole Ⅲ (51) is provided between the outer end of the screw Ⅰ (6) and the end surface of the convex strip Ⅱ (22), and the elastic gasket (5) is in contact with the front and rear end surfaces of the base 1 (1).

2. A method for assembling the axially rotating sealing knife assembly according to claim 1, It is characterized in that The steps are: Step 1: Sealing knife assembly: the knife backs (33) of the two sealing knife components (3) are placed opposite to each other and vertically inserted into the mounting groove (20) formed between two adjacent convex strips; Step 2, fixing the sealing knife: after the sealing knife component (3) is inserted, the pin (4) is coaxially inserted into the through hole I (28) on the convex strip and the through hole II (34) on the sealing knife component (3), and the screw II (27) is screwed in from the bottom of the base II (2), and the screw II (27) is used to fix the pin (4); Step 3: Fixing the second base (2): inserting the coupling column (23) of the second base (2) into the coupling groove (12) of the first base (1); Step 4: Assembling the sealing knife assembly: Assemble the entire axially rotating sealing knife on the machine platform through the fixing groove (13).

3. The method for assembling an axially rotating sealing knife assembly according to claim 2, Features: Between step 3 and step 4, damping assembly is performed, i.e., the elastic gasket (5) is fixed to the front and rear end surfaces of the base 2 (2) by means of screws I (6), and the elastic gasket (5) is in contact with the front and rear end surfaces of the base 1 (1).

4. A sealing method for the axially rotating sealing knife assembly according to claim 1, It is characterized in that The steps are: Step 1: Pressing the sealing knife downward: After the cover tape and the carrier tape run under the sealing groove between the sealing knife components (3), the entire sealing knife is pressed downward in parallel under the drive of the cylinder; Step 2, automatic adjustment of the sealing knife: when the substrates running the cover tape and the carrier tape are unbalanced front to back, the two independent sealing knives in the sealing knife component (3) rotate at a small angle in the X direction around the pin (4); and rotate at a small angle in the Y direction around the axis of the coupling column (23), so that the two sealing knives are loaded on the base and rotate at a small angle in the X and Y directions at the same time; Step 3: Automatic correction of the sealing knife component (3): The elastic gasket (5) contacts the front and rear end surfaces of the base one (1), and acts as a damper when the base two (2) rotates, always maintaining the sealing state of the previous knife; if the next knife needs to be compensated due to unevenness or uneven thickness of the AB side of the carrier tape, this sealing knife component (3) will automatically correct the angle.

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