JP2019060798A - Strength measuring device and strength measuring method for mouth piece section of bottle can - Google Patents

Abstract

To measure strength of a mouth piece section of a bottle can in a closer state of how weight is loaded in an actual capping process.SOLUTION: A strength measuring device includes: can axial direction pressing force means 11 for applying a load to a bottle can whose center is a can axis C in a can axis C direction; and radial direction pressing force means 21 for applying a load to a mouthpiece section 7 of the bottle can in a radial direction relative to the can axis C. At least one of the can axial direction pressing force means 11 and the radial direction pressing force means 21, there are provided: load adjustment means 12, 22 for adjusting a load; control means for controlling at least one of a timing for adjusting the load; an amount of adjustment of the load, and a displacement quantity of pressing force terminals 13, 23 in contact with the bottle can; and load measurement means 14, 24 for measuring a load to be applied to the bottle can.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus and a method for measuring the strength of a base portion of a metal bottle can.

  Thus, as a method of measuring the strength of a metal bottle can, for example, as disclosed in Patent Document 1, the load toward the center of the can in the radial direction of the can can be applied to the skirt valley of the mouth as shown in FIG. (A) Measuring the lateral stiffness (radial stiffness in the radial direction) of the neck portion comprising the mouth portion and the shoulder portion by applying a compression jig indicated by a circle, and FIG. 5 (b) of Patent Document 1 It is described that a load is applied in the can axis direction to the mouthpiece by a compression jig shown in a rectangular shape, and the axial strength is measured.

JP, 2016-196332, A

  As described above, in the strength measurement method described in Patent Document 1, the strength in the can axial direction and the strength in the radial direction are measured separately. However, in the capping step in which the largest load acts on the nozzle in the line for actually filling the contents of the bottle can, the pressure in the can axial direction is applied by the pressure block of the capping device to draw the cap The cap is attached to the cap portion by winding the flare, which is the open end portion of the cap, around the bulging portion of the cap portion with a skirting roller (PP roller).

  That is, since the load in the can axial direction and the load in the radial direction act simultaneously in the capping step, in the measurement method described in Patent Document 1 in which the strength in these directions is separately measured, the load in the actual capping step It becomes difficult to measure the strength against For this reason, at the time of specification change such as the thickness of a metal plate formed into a bottle can, there is a possibility that the judgment of the adaptability of the capping may be hindered.

  The present invention has been made under such a background, and the strength of the cap of the bottle can capable of measuring the strength of the cap of the bottle can in a state closer to the load application in the actual capping step. It aims at providing a measuring device and an intensity measuring method.

  In order to solve the above problems and achieve such an object, the apparatus for measuring strength of a base portion of a bottle can of the present invention applies a load in the direction of the can axis to the bottle can centering on the can axis. An axial pressing means, and a radial pressing means for applying a load to the mouth of the bottle can in the radial direction with respect to the can axis, and at least one of the can axial pressing means and the radial pressing means A control means for controlling at least one of a load adjusting means for increasing and decreasing the load, a timing for increasing and decreasing the load, an increase and decrease amount of the load, and a displacement amount of the pressing terminal in contact with the bottle can; And load measuring means for measuring the load applied to the vehicle.

  In the method for measuring the strength of the cap portion of a bottle can according to the present invention, a load is applied to the bottle can centering on the can axis by the can axial direction pressing means in the can axial direction, and the diameter of the cap portion of the bottle can Load adjusting means for applying a load in the radial direction to the can axis by the direction pressing means, and increasing or decreasing the load on at least one of the can axial direction pressing means and the radial direction pressing means, and timing for increasing or decreasing this load And control means for controlling at least one of the amount of increase and decrease of the load and the amount of displacement of the pressing terminal in contact with the bottle can, and load measurement means for measuring the load applied to the bottle can It is characterized in that the load when the mouthpiece portion of the bottle can is deformed is measured while changing at least one of the load in the can axial direction and the load in the radial direction.

  In such a strength measuring device and method for measuring the strength of the cap of the bottle can, the can axial load and the radial load are simultaneously applied to the cap of the bottle can by the can axial direction pressing means and the radial pressing means. It is possible to measure the strength of the base in a situation closer to the actual capping process. Since at least one of the load in the can axial direction and the radial load is increased or decreased by the load adjusting means controlled by the control means, the load in the can axial direction is constant and the radial load is increased or decreased. In addition, the load in the radial direction is constant while the load in the can axial direction is increased or decreased, or both the load in the axial direction of the can and the radial load are increased or decreased. The strength of the part can be measured, and it becomes possible to accurately determine the adaptability of capping at the time of specification change such as the thickness of a metal plate formed in a bottle can.

  Here, when attaching the cap to the cap of the bottle can, the load in the can axial direction is applied by the pressure block of the capping device as described above to perform drawing processing on the cap, and the flare which is the open end of the cap In the case of a screw can having a male screw part by screwing the male screw part to the cap at the same time by the threading roller. An internal thread is formed. Therefore, the radial direction pressing means applies a load in contact with the bulging portion of the mouthpiece to which the flare, which is the open end of the cap attached to the mouthpiece of the bottle can, is tightened. It is possible to measure the strength to the radial load on the base in a state closer to the actual capping process.

  Specifically, the pressing portion in contact with the bulging portion in the pressing terminal of the radial direction pressing means includes the can axis and the bulging in a cross section along the radial direction to which the radial direction pressing means applies a load Tip end face facing the part, and inclines away from the plane perpendicular to the can axis at an angle in the range of 5 ° to 35 ° as it goes from the tip face to the opposite side to the pressing direction by the pressing terminal It is desirable to provide an upper surface and an arc-shaped chamfered portion in a range of 0.3 mm to 0.6 mm in radius formed at a crossing ridge line portion between the upper surface and the tip surface. Such a cross-sectional shape and size are cross-sectional shapes and sizes along the rotation axis of the outer peripheral surface and the upper surface of the above-described hemming roller, and thus a pressing terminal provided with a pressing portion having such cross-sectional shape and size is used This makes it possible to measure the strength of the mouthpiece to the radial load in a state closer to the actual capping step in the radial pressing means.

  In the actual capping process, as described above, the load block in the can axial direction is applied by the pressure block of the capping device so as to increase the load in the can axial direction and the load in the radial direction is increased by the skirting roller. As described above, since the flare of the cap is plastically deformed and wound around the bulging portion of the mouthpiece, in the method for measuring the strength of the mouthpiece of the bottle can of the present invention, the load in the can axial direction and the radial direction The load when the base of the bottle can is deformed may be measured while increasing at least one of the loads.

  As described above, according to the present invention, it is possible to measure the strength of the mouthpiece under various conditions closer to the actual capping step, and change the specifications of the thickness of the metal plate formed in the bottle can, etc. At any time, it is possible to accurately determine the suitability of capping.

It is a side view showing one embodiment of an intensity measuring device of a cap part of a bottle can of the present invention. It is a top view of embodiment shown in FIG. It is an expanded sectional view of A part of embodiment shown in FIG.

  FIGS. 1 to 3 show an embodiment of the apparatus for measuring the strength of the mouthpiece of a bottle can according to the present invention. In the bottle can whose strength is to be measured in the present embodiment, the can body 1 is integrally formed of a metal material such as aluminum or an aluminum alloy, and the bottom 2 and the top edge side from the outer peripheral edge of the bottom 2 (FIG. 1 An approximately multistage bottomed cylindrical shape centering on the can axis C having an outer peripheral portion 3 extending to the upper side).

  A cylindrical trunk 4 centered on the can axis C and a gradually decreasing inclination toward the upper end in this outer peripheral portion 3 sequentially from the bottom 2 toward the opening on the upper end side of the can main body 1 A frusto-conical shaped shoulder 5 is formed, a cylindrical neck 6 extending from the shoulder 5 toward the upper end, and a mouthpiece 7 are formed. Further, the mouthpiece 7 is a curled portion 8 which is formed by bending the edge of the opening of the can body 1 to the outer peripheral side after the uppermost end is curled to the inner peripheral side, and the lower side of the curled portion 8 The male screw 9 is formed with a male screw, and the lower side of the male screw 9 is flared toward the outer periphery toward the lower side and then reduced in diameter to form a flare which is an open end of a cap (not shown). It is considered as a bulging portion 10 to be tightened.

  In order to manufacture such a can body 1 of a bottle can, a cup-shaped material having a shallow depth is manufactured by first punching out a metal plate of the material as described above in a disk shape and performing drawing processing, and this cup By subjecting the sheet material to redrawing and ironing and drawing in the direction of the can axis C, a bottomed cylindrical body (DI can) in which the bottom 2 and the cylindrical outer peripheral part 3 are formed is formed. Then, by subjecting this bottomed cylindrical body to bottle neck processing, the shoulder 5 and the neck 6 are formed on the upper part of the outer peripheral part 3, and the upper end side of the neck 6 is further expanded to form the bulging part 10. After the male screw portion 9 is formed on the upper end side of the bulging portion 10, the curled portion 8 is formed on the uppermost end, whereby the can body 1 in which the mouthpiece 7 is formed is formed.

  One embodiment of the strength measuring device of the present embodiment for measuring the strength of the mouthpiece 7 of such a bottle can is the above-mentioned manner for the mouthpiece 7 of the can body 1 in which the bottom 2 is grounded and fixed on a stand not shown. The can axial direction pressing means 11 for applying a load in the can axis C direction, and the radial direction pressing means 21 for applying a load to the mouthpiece 7 in the radial direction with respect to the can axis C are provided. In the present embodiment, the can axial direction pressing means 11 is disposed above the can axis C direction of the mouthpiece 7 of the can main body 1 thus fixed, and the mouthpiece 7 in the diameter direction with respect to the can axis C A pair of radial direction pressing means 21 is disposed so as to sandwich it.

  The can axial direction pressing means 11 in the present embodiment is, as shown in FIG. 1, a load adjusting means 12 such as a servomotor, a linear actuator, a servo press, or a hydraulic cylinder or an air cylinder disposed directly above the can body 1. A disc-shaped pressing terminal 13 coaxially attached to the lower end of an output shaft 12a which can be advanced and retracted in the vertical direction extending downward along the can axis C from the load adjusting means 12 via an elastic member 12b such as a coil spring. And a load measuring means 14 such as a load cell which is interposed between the pressing terminal 13 and the lower end of the output shaft 12a and measures the load applied to the bottle can by the pressing terminal 13.

  Further, the pair of radial direction pressing means 21 in the present embodiment are also load adjustment of a servo motor, a linear actuator, a servo press, a hydraulic cylinder, an air cylinder or the like disposed on the side of the mouthpiece 7 of the can body 1 Means 22 and a horizontal shaft attached to the tip of an output shaft 22a which can be advanced and retracted horizontally from the load adjusting means 22 to the base 7 vertically to the can axis C via an elastic member 22b such as a coil spring. A bar-shaped pressing terminal 23 and load measuring means 24 such as a load cell which is interposed between the output shaft 22a and the elastic member 22b and measures the load applied to the bottle can by the pressing terminal 23 are provided. In FIG. 1 and FIG. 2, although the load measuring means 24 is provided only in one of the pair of radial pressing means 21 (the radial pressing means 21 on the right side) of the pair of radial pressing means 21, both diameters The direction pressing means 21 may be provided.

  As shown in FIG. 2, the pressing terminals 23 of the pair of radial direction pressing means 21 are slidably supported by the slide guides 25 so that they can be advanced and retracted in the above-mentioned diameter direction. A pressing portion 26 is formed at the end of the portion 23 facing the side of the can body 1. The pressing portion 26 includes the can axis C and is directed downward in the bulging portion 10 of the mouthpiece 7 as shown in FIG. 3 in a cross section along the radial direction to which the radial direction pressing means 21 applies a load. Accordingly, the end surface 26a parallel to the can axis C facing the portion to be reduced in diameter, and a plane perpendicular to the can axis C from the end surface 26a to the opposite side (right side in FIG. 3) to the pressing direction by the pressing terminal 23 An upper surface 26b inclined in a direction away from P by an angle θ in the range of 5 ° to 35 °, and a radius of 0.3 mm to 0.6 mm formed at the intersection ridge portion between the upper surface 26b and the tip surface 26a And an arc-shaped chamfered portion 26c.

  The pressing portion 26 is a circle having a radius of 0.3 mm to 0.6 mm, which is formed at the intersection ridge line between the lower surface 26 d extending in the direction perpendicular to the can axis C and the lower surface 26 d and the tip surface 26 a. An arc-shaped chamfered portion 26e is also provided, and the radius of the arc-shaped chamfered portion 26e on the lower surface 26d side is also in the range of 0.3 mm to 0.6 mm, and the arc-shaped chamfered portion on the upper and lower surfaces 26b and 26d side The width of the portion in which the tip end face 26a extends parallel to the can axis C between 26c and 26e is 0.5 mm to 1.5 mm so that the pressing portion 26 does not interfere with the can main body 1 below the bulging portion 10. The range of The positions of the radially pressing means 21 and the can main body 1 in the can axis C direction of the bulging part 10 of the mouthpiece 7 are the arc-shaped chamfers 26 c on the upper surface 26 b side of the pressing part 26 of the pressing terminal 23. It is adjustable so as to be at the same position as the downward diameter portion of the two.

  Further, the can axial direction pressing means 11 and the radial direction pressing means 21 are operated at timings at which the loads by the load adjusting means 12 and 22 are increased or decreased, the amount of increase and decrease of the load, and pressure contacting the can body 1 of the bottle can Control means (not shown) such as a computer for controlling the displacement of the terminals 13 and 23 is connected. Further, the load measuring means 14 and 24 of the can axial direction pressing means 11 and the radial direction pressing means 21 are also connected to this control means, and the applied load is stored to increase or decrease the load. The amount of increase and decrease, and the amount of displacement of the pressing terminals 13 and 23 can be output by monitoring or printing.

  In one embodiment of the method of measuring the strength of the mouthpiece 7 of the bottle can of the present invention using such a strength measuring device, for example, the output shaft 12a of the load adjusting means 12 of the can axial direction pressing means 11 is protruded downward. The pressing terminal 13 is brought into contact with the curled portion 8 at the upper end of the mouthpiece 7 of the can body 1, and the output shaft 12a is made to project further to increase the load applied to the mouthpiece 7 in the can axis C direction. At the same time, or at the same time as the actual capping step, the output shaft 22a of the load adjusting means 22 of the pair of radial direction pressing means 21 is delayed at a time when the time from drawing of the cap to winding of the flare is delayed. Of the pressing portion 26 of the pressing terminal 23 so that the arc-shaped chamfered portion 26c abuts on the portion of the bulging portion 10 which is gradually reduced in diameter, and the output shaft 22a is further protruded. It is made to protrude and the load applied to the nozzle | cap | die part 7 to radial direction is made to increase.

  During this time, the load measuring means 14 and 24 of the can axial direction pressing means 11 and the radial direction pressing means 21 continue to measure the load applied to the mouthpiece 7. Then, when deformation or buckling in the can axis C direction occurs in the cap portion 7, this is detected by the load measuring means 14 of the can axial direction pressing means 11, and the strength in the can axis C direction of the cap portion 7 is measured. When radial deformation or buckling occurs in the mouthpiece 7, this is detected by the load measuring means 24 of the radial direction pressing means 21, and the strength in the radial direction of the mouthpiece 7 is measured.

  Thus, in the strength measuring device and the strength measuring method of the cap portion 7 of the bottle can having the above configuration, the can portion C direction of the cap portion 7 of the bottle can is measured by the can axial direction pressing means 11 and the radial pressing means 21. Load and radial load can be applied simultaneously. That is, the strength of the mouthpiece 7 can be measured in a situation closer to the actual capping process in which a load is applied to the mouthpiece 7 both in the can axis C direction and in the radial direction.

  And, in the present embodiment, since both the load in the can axis C direction and the load in the radial direction are increased by the load adjusting means 12 and 22 controlled by the control means, for example, as described above When changing the specifications such as the thickness of a metal plate to be formed into 1, it is possible to add up to the extent of the load in the can axis C direction and the load in the radial direction when capping. It is also possible to judge the suitability precisely in a situation closer to the actual capping step.

  In the strength measurement method of the present embodiment, both the load in the can axis C direction and the load in the radial direction are thus increased by the load adjusting means 12 and 22, but for example, the load in the can axis C direction is The load in the radial direction may be increased as constant, or conversely, the load in the can axis C direction may be increased as constant in the radial direction. Alternatively, one of the load applied in the direction of the can axis C and the load in the radial direction may be decreased and the other may be increased. In other words, in the strength measuring method using the above-described strength measuring device, various methods can be used. It is possible to measure the strength of the cap 7 of the bottle can under the conditions.

  However, in the actual capping step, the load in the direction of the can axis C is increased by the pressure block of the capping device so that the cap is drawn, and the load in the radial direction is increased by the skirting roller. Because the flare of the cap is plastically deformed and wound around the bulging portion 10 of the mouthpiece 7, at least one of the load in the can axis C direction and the radial load (both in this embodiment, as in the present embodiment) It is desirable to measure the load when the mouthpiece 7 is deformed while increasing.

  Further, in the strength measuring device of the cap portion 7 of the bottle can of the present embodiment, as described above, the flare, which is the open end of the cap attached to the cap portion 7 of the bottle can, is wound. The load is applied in contact with the bulging portion 10, and in the actual capping step, the cap portion is closer to the condition in which the flare of the cap is wound around the bulging portion 10 of the cap 7 by the skirt roller. The strength of 7 can be measured.

  Moreover, in the present embodiment, the press portion 26 of the press terminal 23 of the radial direction pressing means 21 includes the can axis C, and the cross section along the radial direction in which the radial direction pressing means 21 applies a load. The end surface 26a parallel to the can axis C facing the portion of the bulging portion 10 which is directed downward and the diameter decreasing in the downward direction, and the can axis extending from the end surface 26a to the opposite side to the pressing direction by the pressing terminal 23 An upper surface 26b inclined in a direction away from the plane P perpendicular to C at an angle θ in the range of 5 ° to 35 °, and a radius of 0.3 mm formed at the intersection ridge line portion between the upper surface 26b and the tip surface 26a An arc-shaped chamfered portion 26c in the range of 0.6 mm is provided, and the cross-sectional shape and dimensions are the cross-sectional shape and dimensions along the rotation axis of the upper surface and the outer peripheral surface of the skirting roller.

  Therefore, according to the present embodiment, the strength against the load of the mouthpiece 7 in the radial direction is closer to the situation in which the flare of the cap is wound around the bulging part 10 of the mouthpiece 7 by the foot winding roller in the actual capping step. Can be measured. Further, in the present embodiment, such a pressing portion 26 is formed at the tip of the bar-shaped pressing terminal 23 of the radial direction pressing means 21 facing the can main body 1 side, and the hemming roller in the actual capping step Compared to contact with the flare by substantially point contact, the contact area with the bulging portion 10 can be secured to promote application and measurement of the load by stable pressing.

  In the present embodiment, the timing at which the control means in the can axial direction pressing means 11 and the radial direction pressing means 21 increases and decreases the load by the load adjusting means 12 and 22, the increase and decrease amount of this load, and the can of the bottle can Although all of the displacement amounts of the pressing terminals 13 and 23 in contact with the main body 1 are controlled, at least one of them may be controlled. However, in order to be able to measure the strength of the base 7 under various conditions as described above, it is desirable to control all of these by the control means as in this embodiment.

  Further, in the present embodiment, the load adjusting means 12 and 22, the control means, and the load measuring means 14 and 24 are provided on both the can axial direction pressing means 11 and the radial direction pressing means 21. These are provided only in one of the can axial direction pressing means 11 and the radial direction pressing means 21, and a constant constant load set in advance is always applied to the mouthpiece 7 in the other of the can axis C direction and the radial direction. It may be configured to be However, also in this case, in order to make it possible to measure the strength of the mouthpiece 7 under various conditions as described above, both the can axial direction pressing means 11 and the radial direction pressing means 21 as in this embodiment. Preferably, the load adjusting means 12, 22, the control means, and the load measuring means 14, 24 are provided.

Reference Signs List 1 can main body 7 cap portion 10 bulging portion 11 can axial direction pressing means 12, 22 load adjusting means 13, 23 pressing terminals 14, 24 load measuring means 21 radial pressing means 26 pressing portion 26 of pressing terminal 23 of pressing portion 26a End surface 26b Upper surface 26c of pressing portion 26 Arc-shaped chamfered portion C of pressing portion 26 Can shaft

Claims (5)

Can axial direction pressing means for applying a load in the can axial direction to a bottle can centered on the can axis;
And a radial pressing means for applying a load in the radial direction to the can axis to the mouthpiece portion of the bottle can;
At least one of the can axial direction pressing means and the radial direction pressing means, a load adjusting means for increasing or decreasing the load, a timing for increasing or decreasing the load, an increase or decrease amount of the load, and a pressing terminal contacting the bottle can An apparatus for measuring the strength of a cap portion of a bottle can, comprising: control means for controlling at least one of the displacement amounts of; and load measuring means for measuring a load applied to the bottle can.   The radial direction pressing means is characterized in that a load is applied in contact with the bulging portion of the mouthpiece to which the flare which is the open end of the cap attached to the mouthpiece of the bottle can is wound. The strength measuring device of the cap part of the bottle can as described in.   The pressing portion in contact with the bulging portion in the pressing terminal of the radial direction pressing means opposes the bulging portion in a cross section along the radial direction in which the radial direction pressing means applies a load, including the can axis An end surface, and an upper surface inclined in a direction away from the plane perpendicular to the can axis as it goes from the end surface to the opposite side to the pressing direction by the pressing terminal; The mouth ring of the bottle can according to claim 2, further comprising: an arc-shaped chamfered portion with a radius of 0.3 mm to 0.6 mm formed at a crossing ridge line portion between the upper surface and the tip end surface. Part strength measuring device. While applying a load in the can axial direction to the bottle can centering on the can axis by the can axial direction pressing means,
A load is applied to the mouthpiece of the bottle can in the radial direction with respect to the can axis by radial pressing means,
A load adjusting means for increasing or decreasing the load on at least one of the can axial direction pressing means and the radial direction pressing means, a timing for increasing or decreasing the load, an increase or decrease amount of the load, and a pressure terminal contacting the bottle can A control means for controlling at least one of displacement amounts; and a load measurement means for measuring a load applied to the bottle can,
A method of measuring strength of a cap portion of a bottle can, which comprises measuring the load when the cap portion of the bottle can is deformed while changing at least one of the load in the can axial direction and the load in the radial direction.   The mouthpiece of the bottle can according to claim 4, wherein the load when the mouthpiece of the bottle can is deformed is measured while increasing at least one of the load in the can axis direction and the load in the radial direction. How to measure the strength of the part.

Images