JPH05162706A - Controller for press for forming lateral adhesion part in apparatus for producing packaged article - Google Patents

Abstract

PURPOSE:To form lateral adhesion parts accurately at specified intervals even in the case where intervals of the lateral adhesion parts are varied when sealed bag-like packaged articles are produced continuously by forming vertical adhesion parts continuously on a belt-like film material with a hot roll and forming the lateral adhesion parts at predetermined intervals with a hot press and a cooling press. CONSTITUTION:The longitudinal size of an article 4 to be packaged is converted into the number of pulses by an electronic type control unit 26, while the number of rotations of a hot roll, 11 is converted into the number of pulses by a pulse generator 18 and these numbers of pulses are compared with each other by a comparator 27, whereby a rotation start signal is sent to a rotational speed variable setter 28 from which an operation signal based on an operation condition sent from the electronic type control unit 26 is given to a rotation controller 22 for a hot press 13. Further, on the basis of rotation start timing instruction data sent from the electronic type control unit 26 to the rotational speed variable setter 28, the same operation signal as the operation condition of the hot press 13 is given to a rotation controller 25 for a cooling press 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously producing a package by supplying contents while thermally adhering a strip-shaped film material, and laterally adhering portions extending in the width direction of the film material at predetermined intervals. The present invention relates to a device for controlling the rotation of a hot press mold to be formed and a cooling press mold for press-finishing a laterally bonded portion.

[0002]

2. Description of the Related Art One side of a strip-shaped film material made of paper, cellophane, metal foil, etc. provided with a synthetic resin layer is folded in two and overlapped, or two pieces are overlapped and a side edge extending in the longitudinal direction thereof. Is continuously heat-bonded by a heat roll mold to form a vertical bond, and a heat press mold is heat-bonded in the width direction to form a horizontal bond, which is opened rearward of the horizontal bond in the transfer direction. A technique for continuously producing a sealed bag-like package by repeating the operation of supplying and filling a predetermined amount of contents in a tubular portion and forming a lateral adhesive portion behind the lateral adhesive portion at a constant interval is well known. is there.

In such a package manufacturing apparatus,
The peripheral speeds of the hot roll mold and the hot press mold are synchronized with the feeding speed of the film material so that the film material is not unduly pulled or loosened when the lateral adhesive portion is formed. Therefore, when changing the size of the package according to the width direction, it is possible to carry out without any change to the device, but when changing the size according to the longitudinal direction, the time interval of heat bonding by the heat press die Must be changed.

As a means for changing the time interval of heat bonding by the hot press mold, that is, the distance interval of the lateral bonding portion, it is troublesome to replace the heat pressing mold with a diameter for forming the lateral bonding portion at a predetermined distance interval. It has been proposed to eliminate the economic disadvantages and to use a single hot press mold to change the distance between the laterally bonded sections.

One of them is to provide a separate motor controller for driving the heat roll type and the heat press type respectively with different drive motors and for giving a drive signal to the drive motors by a speed signal from a common speed setter. The rotational speed of the hot press type during the formation of the lateral adhesive is synchronized with the steady rotational speed of the heat roll type, and separately from this, a rotational position detector of the hot press type and a transmission for inputting signals from it are provided. When a horizontal adhesive portion is formed by providing the gears, the transmission transmits a shift signal to the heat press type motor controller to control the rotational speed of the heat press type to an arbitrary peripheral speed signal value given to the transmission. It is disclosed in Japanese Patent Application Laid-Open No. 61-142105 (or Japanese Patent Publication No. 3-66208).

That is, according to the technical means disclosed in the above publication, the peripheral speed at which the heat press mold forms the laterally bonded portion is made equal to the peripheral speed of the heat roll mold by the speed signal provided by the speed setting device. By setting the peripheral speed when the lateral adhesive joint is not formed by the peripheral speed signal given by the transmission, the distance between the lateral adhesive joints can be changed arbitrarily without the need to replace the heat press die or other parts. can do.

However, a speed change instruction when moving from the time when the hot press mold is in contact with the film material to form the lateral adhesive portion to the non-formation time when it is separated from the film material and the next lateral adhesive portion is formed, In addition, the speed change instruction when shifting from the non-formation time to the formation time is performed by the rotary position detector consisting of the combination of the limit switch and the kicker arranged in parallel in the heat press type, and based on the electric signal generated by the mechanical operation. In addition, since the rotation speed is controlled, the response is not always good and the reproducibility is low, and there is a great concern that the distance between the lateral adhesive portions will vary. Also, variation is likely to occur due to the indexing accuracy of the limit switch kicker, and even if a rotational position detector is configured by combining optical sensors and magnetic sensors, variation may occur due to errors and deviations in their installation positions. Inevitable.

[0008]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to mechanically change the rotational position of a horizontal press die, which is provided in order to arbitrarily change the distance between the laterally bonded portions of the hot press die. The means for detecting and setting the rotational speed at the time of non-formation of the lateral adhesive portion to an arbitrary speed easily causes variation in the distance interval, and the longitudinal dimension is arbitrarily changed to accurately measure the lateral adhesive portion at a constant distance interval. The point is that there was no simple and reliable means that could repeatedly form.

Further, there is a package manufacturing apparatus equipped with a cooling press die for press-finishing the lateral adhesive portion. However, when the distance interval of the lateral adhesive portion is changed, in addition to the hot press die, when the cooling press die is not pressed, Despite having to change the rotation speed, there was no means to take this into account,
This is also a problem to be solved by the present invention.

[0010]

Means for Solving the Problems The present invention solves the above problems in the case where the lateral bonding portion forming press die is a hot pressing hot pressing die and when it is a hot pressing die and a finishing cooling press die. As a means for solving the problem, an electronic control unit that stores the operation condition set arbitrarily for the heat roll type and the heat press type and the cooling press type and sends a predetermined operation signal to the rotation controller of the heat roll type, A pulse generator that oscillates pulses according to the rotation speed of the heat roll type is compared with the number of pulses given by the electronic control unit as rotation start timing instruction data of the heat press type and the number of pulses generated by the pulse generator. When the rotation start signal is input, the comparator that issues a rotation start signal when these match and the operation condition of the heat press type and the cooling press type sent from the electronic control unit are input. Was allowed comprising a rotational speed variable setter sends the operation signal to the cooling press rotary controller for, based further given as the operation signal to the press rotary controller of the rotation start timing instruction data given from the electronic control unit.

[0011]

[Function] The hot roll type and the hot press type and the cooling press type when in contact with the film material rotate at a speed corresponding to the feeding speed of the film material, and the hot press type and the cooling press when not in contact with the film material. The mold stops. The stop time is determined by the feed rate of the film material and the lengthwise dimension of the package, and the number of revolutions of the heat roll mold is converted into a pulse number while the film material is fed by the length of one package and the heat roll is converted into data. The rotation start signal of the hot press mold and the cooling press mold is issued by comparing with the number of pulses generated by the rotation of the mold. Based on this rotation start signal, the heat press die is rotated according to the predetermined operation condition, and based on the rotation start timing instruction data set according to the longitudinal dimension of the package, the cooling press die is the same operation condition as the heat press die. Rotate according to. As a result, it is possible to continuously manufacture a package having a uniform size with no variation in the dimension in the longitudinal direction and to accurately form the lateral adhesive portion even if the dimension in the longitudinal direction is arbitrarily changed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a flexible strip-shaped film material 1 is folded in two and its overlapping side edges are arranged in the circumferential direction of a heat roll mold 11. The longitudinal bonding portion 2 is formed by sandwiching the formed annular pressing die 12 and continuously thermally adhering the tubular film material 1 to the rod-shaped pressing die 14 formed in the axial direction of the heat press die 13. Then, a horizontal adhesive portion 3 is formed by heat-bonding in the width direction, and a predetermined amount of content is supplied and filled from the nozzle 5 to the open cylindrical portion above the horizontal adhesive portion 3, and the horizontal adhesive portion 3 is horizontally moved to the rear side by a predetermined distance. 1 schematically shows an apparatus for continuously producing a sealed bag-shaped package 4 by repeating the operation of forming the adhesive portion 3. The lateral adhesive portion 3 is further sandwiched by a rod-shaped pressing die 16 formed in the axial direction of the cooling press die 15 to discharge residual bubbles and completely adhere the incompletely adhered portion, so that there is no fear of leakage of contents. Finished on the bonded part.

The heat roll mold 11, the heat press mold 13 and the cooling press mold 15 are rotated by respective electric motors 17, 20 and 23.
Servo motors 0 and 23 are generally used in servo mechanisms and are suitable for stable low-speed rotation and rapid acceleration / deceleration.

FIG. 2 is a block diagram showing an embodiment of the present invention, in which 26 is an electronic control unit, 27 is a comparator, and 2 is a comparator.
8 is a rotary speed variable setting device, 18, 21, 24 and 1
Reference numerals 9, 22, and 25 are rotation controllers composed of pulse generators and amplification circuits, which are encoder circuits dedicated to the respective electric motors 17, 20, and 23.

The peripheral speed of the pressing die 12 of the hot roll die 11 is always equal to the feeding speed of the film material 1. Further, the peripheral velocities of the pressing dies 14 and 16 of the hot press die 13 and the cooling press die 15 are equal to the feeding speed when in contact with the film material 1 to form the lateral bonding portion 3, but when the film material 1 is separated from the peripheral speed, After stopping and waiting for the next adhesion, the stopping time is determined by the feed rate of the film material 1 and the longitudinal dimension of the package 4. That is, the rotation speeds of the heat roll mold 11, the heat press mold 13, and the cooling press mold 15 and the rotation start timing in the repeated cycle of rotation and stop of the heat press mold 13 and the cooling press mold 15 are varied depending on the conditions on the film material 1 side. The control elements are set and are input to the electronic control unit 26 and stored therein. From this, it is understood that the longitudinal dimension of the package 4 can be arbitrarily changed by changing the rotation start timing of the hot press die 13 and the cooling press die 15.

Thermal roll type 11 of electronic control unit 26
The driving condition, that is, the rotation speed, is sent to the rotation controller 19 as a driving signal composed of voltage, and is converted into a predetermined driving power and supplied to the electric motor 17 to rotate the heat roll mold 11 at a predetermined rotation speed. The rotation speed of the electric motor 17 is fed back from the pulse generator 18 to the rotation controller 19 as a pulse signal, and feedback control is performed in which the actual rotation speed is compared with the operation signal to be the set rotation speed.

On the other hand, among the control elements for the heat press die 13 and the cooling press die 15 of the electronic control unit 26, the rotation start timing of the heat press die 13 is converted into a predetermined pulse number and input to the comparator 27, When the number of pulses from the pulse generator 18 input to the comparator 27 via the rotation controller 19 is added and becomes equal to the predetermined number of pulses,
Alternatively, the predetermined number of pulses is subtracted by the pulse from the pulse generator 18, and when it becomes zero, a rotation start signal is sent to the rotation speed variable setter 28 including a variable frequency divider.

That is, the distance between the lateral adhesive portions 3 which is the longitudinal dimension of the package 4 can be represented by the number of rotations of the heat roll die 11, and since the rotation speed is given as an initial condition, one package 4 is provided. The number of pulses generated by the pulse generator 18 while the film material 1 is fed by the length of a minute can be calculated by the electronic control unit 26. The number of pulses is input to the comparator 27 as data indicating the rotation start timing of the heat press die 13.

The operating conditions of the electronic control unit 26 with respect to the heat press die 13 and the cooling press die 15, that is, the rotation speed and rotation angle of these are converted into a predetermined number of pulses and input to the rotation speed variable setter 28. When the rotation start signal is input, an operation signal composed of a pulse is sent to the rotation controller 22, where it is converted into a predetermined driving power and supplied to the electric motor 20 to rotate the heat press die 13 at a predetermined rotation speed. And rotate it by a predetermined angle. In this case also, the rotation speed of the electric motor 20 is fed back from the pulse generator 21 to the rotation controller 22, and feedback control is performed so that the actual rotation speed matches the set rotation speed.

The rotation speed variable setter 28 is capable of outputting a pulse having an arbitrary frequency, and can arbitrarily change the rotation speeds of the electric motor 20 and the electric motor 23 of the cooling press die 15 described later. Further, it constantly monitors whether or not the pulse, which is the output operation signal, matches the operation condition designating data sent from the electronic control unit 26. As a result, the heat press mold 13 is intermittently rotated by a fixed angle in accordance with the density and the number of pulses controlled by the program set according to the longitudinal dimension of the package 4.

An example of the rotation control of the heat press die 13 will be described below with reference to FIGS. 3 and 4. The heat press die 13 installed with the film material 1 sandwiched is stopped at the position shown in FIG. From this, rotation is made in the direction of the arrow B, C, D in the direction of the arrow for thermal bonding, and the operation is stopped at the position indicated by E to wait for the next operation signal. The three pressing dies 14 are provided at equal intervals in the circumferential direction. Therefore, when the hot pressing dies 13 rotate by 120 degrees and rotate by 60 degrees, the centers of the pressing dies 14 contact the film material 1.

The rotation cycle T of the hot press die 13 is equal to the cycle of the rotation start signal, and the peripheral speed N when the pressing die 14 is in contact with the film material 1 is equal to the peripheral speed of the pressing die 12 of the heat roll mold 11. When the number of pulses for rotating the heat press die 13 from A to E in FIG. 3 is P, the rotation speed variable setting device 2
Reference numeral 8 subtracts the number of pulses sent to the rotation controller 22 from P to reach a target rotation speed with a predetermined number of pulses.
In other words, to reach a higher rotational speed than N in reference to post-start pulse number P ₁ to FIG. 4, from N by P ₅ accelerated again P ₄ after the N with P ₃ starts deceleration at P ₂ also to reach a high the rotational speed, is intended to bring to a stop at P starts deceleration at P _6. Between the number of pulses P ₃ and P ₄ rotated at the peripheral speed N is a section in which the die 14 contacts the film material 1 for thermal bonding, and P ₃ is the position of FIG. 3B and P ₄ is the position of D. ..

Thus, in this embodiment, the hot press die 1 is used.
3 is rotated at a speed higher than the speed corresponding to the feeding speed of the film material 1 before and after thermal bonding, in order to prevent malfunction, a fixed time or more is required for the stop time T ₂ until the start of the next rotation. This is because the rotation time T ₁ needs to be shortened because the package 4 having a short lengthwise dimension may be manufactured. 4 in which the horizontal axis, vertical axis and time and rotation speed, the pulse number P indicated by the area of the portion surrounded by the and graphs of the time axis and the rotation speed is constant, to shorten the T ₁ is It is obvious that it is advantageous to make the maximum rotation speed as high as possible and to perform rapid acceleration and deceleration.

Although the lateral bonding portion 3 is formed by the heat press die 13 at an arbitrary distance interval as described above, the cooling press die 15 for finishing the lateral bonding portion 3 is also controlled in the present invention. The rotation pattern of the cooling press die 15 is basically the same as that of the heat press die 13, and the rotation speed and the rotation speed are common among the operating conditions set in the electronic control unit 26.

The hot press die 13 and the cooling press die 15 are installed at arbitrary intervals, and when a pulse as an operation signal is sent from the rotation speed variable setter 28 to the rotation controller 22 of the heat press die 13, a predetermined value is given. A pulse which is an operation signal is sent to the rotation controller 25 of the cooling press die 15 at a timing, converted into a predetermined driving power and supplied to the electric motor 23, and the cooling press die 15 is supplied.
The same rotation as the heat press die 13. Also in this case, the rotation speed of the electric motor 23 is fed back from the pulse generator 24 to the rotation controller 25, and feedback control is performed so that the actual rotation speed matches the set rotation speed.

When the longitudinal dimension of the package 4 is changed,
It is necessary to change the rotation start timing of the cooling press die 15 and bring the die 16 into accurate contact with the lateral adhesive portion 3. For that purpose, it is necessary to change the rotation cycle of the cooling press die 15, that is, the timing of the rotation start, to new data. This timing depends on the feeding speed of the film material 1 and the longitudinal dimension of the package 4 and the cooling press die 15 is rotated. Since the rotation cycle can be known, it can be easily set by the electronic control unit 26, and this timing is input to the rotation speed variable setter 28 as data for instructing the rotation start timing of the cooling press die 15, and the heat press die 13 is set. Separately, a pulse which is an operation signal is sent to the rotation controller 25.

When the operation signals are issued to the hot press die 13 and the cooling press die 15 as described above, the comparator 27 starts the comparison of the number of pulses for the next rotation start signal of the heat press die 13, Further, the rotation speed variable setting device 28 measures the timing of the next rotation start of the cooling press die 15.

[0028]

As described above, according to the present invention, the longitudinal dimension of the package is converted into the number of pulses, and the rotational speed of the vertical adhesive part forming heat roll type rotating at a speed corresponding to the feeding speed of the film material is determined. It is converted into the number of pulses and compared with each other, and since the rotation press signal of the horizontal press bond forming hot press mold is issued at every distance interval of one package, even if the distance interval of the horizontal bond part is changed, the pulse is output. By laterally adhering portions at precisely predetermined intervals by electrical means of changing the number, it is possible to continuously manufacture packages of precisely constant size without variation in dimensions. Further, when the cooling press die is provided, the timing for starting the rotation can be arbitrarily and appropriately set by electric means, so that the lateral adhesion portion can be accurately press-finished even if the distance interval is changed. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a schematic front view showing the outline of a package manufacturing apparatus.

FIG. 2 is a block diagram showing an embodiment of a control device of the present invention.

FIG. 3 is an explanatory diagram of an operation sequence of a heat press type.

FIG. 4 is a diagram showing an example of rotation control of a heat press type.

[Explanation of symbols]

11 heat roll type, 13 heat press type, 15 cooling press type, 17, 20, 23 electric motor, 18, 21, 24 pulse generator, 19, 22, 25 rotation controller, 26 electronic control unit, 27 comparator, 28 rotation speed variable setting device,

Claims (2)

[Claims] 1. A heat roll die for forming a longitudinal adhesive portion extending in the longitudinal direction of a film material and a hot press die for forming a lateral adhesive portion extending in the width direction at predetermined intervals in the longitudinal direction, and the hot roll die and the heat press die. In a package manufacturing apparatus comprising: an electric motor for separately rotating the electric motor and a rotation controller for separately applying a predetermined driving power to the electric motor; arbitrarily set operation of the heat roll type and the heat press type. An electronic control unit that stores the condition and sends a predetermined operation signal to the thermal roll type rotation controller, a pulse generator that oscillates a pulse according to the rotational speed of the thermal roll type, and the electronic control unit And a comparator which issues a rotation start signal when the number of pulses given as the rotation start timing instruction data of the heat press type and the number of pulses issued by the pulse generator are compared with each other. A rotation speed variable setting device that gives the operation condition of the heat press type sent from the electronic control unit to the rotation controller of the heat press type as an operation signal when the rotation start signal is input; A press-type control device for forming a laterally bonded portion, which is characterized by: 2. A heat roll die for forming a longitudinal adhesive portion extending in the longitudinal direction of the film material, a hot press die for forming a lateral adhesive portion extending in the width direction at predetermined intervals in the longitudinal direction, a cooling press die, and the hot roll die. A package manufacturing apparatus comprising: an electric motor for separately rotating a hot press mold and a cooling press mold; and a rotation controller for separately applying a predetermined driving power to each electric motor; Type and cooling press type, an electronic control unit that stores the operation condition set arbitrarily and sends a predetermined operation signal to the heat roll type rotation controller, and a pulse corresponding to the rotation speed of the heat roll type. A pulse generator that oscillates, and the number of pulses given as the rotation start timing instruction data of the heat press type from the electronic control unit and the number of pulses generated by the pulse generator are compared. By comparison, when the rotation start signal is input, the comparator that issues a rotation start signal when they match, and the operating conditions of the heat press mold and the cooling press mold sent from the electronic control unit are the heat press mold. And a rotation speed variable setting device for transmitting a driving signal to the cooling press type rotation controller based on the rotation start timing instruction data given from the electronic control unit. A press-type control device for forming a laterally bonded portion, which is characterized by: