JP2018122285A - Liquid adhesive intermittent coating apparatus and liquid adhesive intermittent coating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid adhesive intermittent coating device and a liquid adhesive intermittent coating system which makes a solenoid valve for actuation control of operation air unnecessary, permits intermittent non-coating at a high speed that exceeds a response speed of the solenoid valve, further, makes a supply mechanism of the operation air for OFF actuation and ON actuation unnecessary and simplifies the system.SOLUTION: Provided is a liquid adhesive intermittent coating apparatus having a valve body driving mechanism which is provided with a rotary cam circular body formed of a plurality of pairs of a mountain surface and a valley surface on a circumferential surface, is provided with a needle integrated with a movable valve body of a suck back type adhesive supply control valve mechanism and is configured such that a tip of the needle is brought into contact with the circumferential surface of the rotary cam circular body. Therein, an inner chamber 22 is formed on an upper part of a housing 10 of the suck back type adhesive supply control valve mechanism, the movable valve body and the needle are constituted so as to be vertically moved in one body via a connection body 41 equipped within the inner chamber 22, a magnet is equipped so as to be located on a bottom surface of the inner chamber 22, a rising force is energized to the needle by magnetic actuation between the magnet and a connection tool and is energized to OFF actuation at all times, on the other hand, a cam surface is brought into contact with the mountain surface and, thereby, ON actuation is acquired.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid adhesive intermittent application apparatus for applying a liquid adhesive to an application substrate at high speed. More particularly, the present invention relates to a liquid adhesive intermittent application device and a liquid adhesive intermittent application system for intermittently and intermittently applying a liquid adhesive to an application surface of an application substrate running on an application line.

Patent Publication JP-A-4-71922

In a conventional liquid adhesive intermittent / intermittent application device, a suck-back type application gun disclosed in Patent Document 1 is provided as means for improving the application interruption during intermittent / intermittent application and clarifying the front and rear boundary lines of the application section. Unit exists.
The liquid adhesive intermittent application device shown in FIG. 16 is equipped with the suck back type application gun unit described above, and is used to move the adhesive valve head device, the valve mechanism including the movable valve body, and the movable valve body up and down. It comprises a piston, a movable valve drive mechanism including a piston chamber, an adhesive supply device by an operation air supply mechanism to the piston chamber, and an adhesive supply device to the valve mechanism.
The movable valve drive mechanism divides the piston chamber formed in the upper part of the valve housing into two upper and lower chambers P1 and P2, and supplies operation air K1 and K2 from the operation air source K to the upper and lower two chambers P1 and P2 of the piston chamber. An operation of OFF operation / ON operation (valve opening / valve closing) is performed by alternative control from the electromagnetic valve control 16. Therefore, there is a problem that the intermittent application timing is limited by the response speed of the solenoid valve.

An object of the present invention is to enable intermittent intermittent “non-coating” at a high speed exceeding the response speed of the solenoid valve without using a solenoid valve for controlling the operation of the operation air.
It is another object of the present invention to simplify the system by eliminating the need for an operating air supply mechanism for the OFF operation / ON operation.

The first invention of the present application is
A rotating cam circle having a plurality of pairs of crests and troughs is provided on the peripheral surface, a needle integrated with a movable valve body of a suck back type adhesive supply control valve mechanism is provided, and the tip of the needle is A liquid adhesive intermittent application device having a valve body drive mechanism configured to contact with the peripheral surface of the rotating cam circle,
An inner chamber 22 is formed in the upper part of the housing 10 of the suck back type adhesive supply control valve mechanism,
The movable valve body and the needle are integrally and vertically moved through the connecting body 41 provided in the inner chamber 22,
A magnet is provided on the bottom surface of the inner chamber 22, and a magnetic force is applied to the connecting tool to urge the needle to a lifting force, to always force the OFF operation, and to contact the cam surface with the mountain surface. Provided is a liquid adhesive intermittent coating apparatus characterized by being turned on.
The second invention of the present application is
While arranging a plurality of liquid adhesive applicators of the first invention in parallel,
A servo motor that uses a rotating shaft for the rotating cam circle of the valve drive mechanism of each of the plurality of suck-back type coating gun units as a single common rotating shaft, and synchronizes the common rotating shaft with the traveling speed of the coating substrate. The liquid adhesive intermittent application system is characterized by being driven by the above.

The present invention has the effect of reducing the manufacturing cost, operating cost, and maintenance cost of the liquid adhesive coating line due to the absence of the operation air supply line and the power supply line for operation of the solenoid valve. This has the effect of enabling the setting of the application timing in an extremely short time without being limited by the response speed exceeding the valve area. Therefore, it is possible to perform ultra-high speed multi-intermittent application in which the boundary line of the end of the application section is clarified in an extremely short application section.
In addition to the first invention of the present application, the second invention of the present application is based on the setting of the cam surface of the rotating cam circle of the valve element drive mechanism of the adhesive intermittent application system arranged in parallel. The coating patterns by the coating heads arranged in parallel are set independently of each other, and the common rotation axis is synchronized with the traveling speed of the coating substrate by a servo motor, so that each of the plurality of coating lines is liquid. This has the effect of enabling the adhesive application pattern (application position and application length) to be set independently.

The longitudinal cross-sectional view of a front view which shows the outline | summary of the liquid adhesive intermittent coating device of this invention. FIG. The longitudinal cross-sectional view which shows a suck back type application gun unit in the ON operation state similarly. The longitudinal section similarly shown in the OFF operation state. FIG. 4 is an explanatory diagram of a rotary cam circle of a four-part valve body drive mechanism. FIG. A shows an OFF operation / needle ascent position, FIG. B shows an ON operation / needle descending, and FIG. The needle lowering position is shown. FIG. 6 is an explanatory view similar to FIG. 5 for a rotary cam circle of an eight-divided valve body drive mechanism. The top view explaining the application | coating state to the application | coating base material (nonwoven fabric sheet) by this invention. It is a front view which shows the outline | summary of the liquid adhesive intermittent application apparatus equipped with the comb nozzle, and shows an ON operation state. Front view showing in the OFF operation state A comb nozzle is shown, a figure is a perspective view, b figure is a front view, and c figure is a longitudinal section. Explanatory drawing of the application | coating state to an application | coating base material (nonwoven fabric sheet). Perspective view of a composite elastic member with a brief as a product Similarly longitudinal section. The front view which shows the outline | summary of the liquid adhesive intermittent application system equipped with the comb nozzle of this-application 2nd invention. Similarly bottom view 1 is a schematic diagram of a liquid adhesive intermittent application device that requires a solenoid valve and an operating air.

Preferred embodiments of the invention

The first invention of the present application is
The suck back type adhesive supply control valve mechanism, the valve element drive mechanism, and the adhesive application head constitute a liquid adhesive intermittent application device.
About the valve body drive mechanism, a needle integrated with the movable valve body of the suck back type adhesive supply control valve mechanism is provided, and a rotating cam circle having a plurality of pairs of crests and troughs on the peripheral surface is provided, The tip of the needle is configured to contact the peripheral surface of the rotating cam circle.
An inner chamber 22 is formed in the upper part of the housing 10.
A connecting body 41 is provided in the inner chamber 22. The movable valve body and the needle are integrally and vertically moved through the connecting body 41.
A magnet is provided on the bottom surface of the inner chamber 22, and by the magnet, a rising force is urged to the needle by a magnetic action between the coupling tool and the OFF operation is always urged.
When the cam body rotates, the cam surface is turned on when it contacts the mountain surface.
The second invention of the present application is
A plurality of the liquid adhesive intermittent application devices of the first invention are arranged in parallel.
A plurality of suck-back type application gun units is provided with a single common rotation shaft that is common to the rotation shafts for the rotary cam circles of the valve body driving mechanisms.
The common rotating shaft is equipped with a servo motor.
The servo motor is operated synchronously with the motor for the driving roller of the substrate traveling line.

The present invention will be described in detail based on embodiments shown in the drawings.
1 and 2, the suck back type adhesive supply control valve mechanism 1, the valve body drive mechanism 2, and the adhesive application head 3 constitute a liquid adhesive intermittent application apparatus A.
The suck-back type adhesive supply control valve mechanism 1 forms a valve chamber 13 in the lower part of the housing 10, forms a valve seat 14 on the lower surface of the valve chamber 13, and has an adhesive inlet 15 that leads to the valve chamber 13. Is formed on the side wall.
As described above, the valve mechanism that opens and closes the movable valve body 11 is configured between the valve seat 14 and the enlarged portion 11A of the movable valve body 11.

  As an adhesive supply means to the suck back type adhesive supply control valve mechanism 1, an adhesive supply pressure adjusting device 4 is provided adjacent to the side surface of the housing 10, and is supplied to the valve chamber 13 through the adhesive inlet 15. The pressure adhesive is supplied.

  An adhesive supply pressure source 40 and a heating hose 41 for the adhesive supply pressure adjusting device 4 are provided.

5 and 6 are explanatory views of the rotating cam circle 6. In the embodiment, FIG. 5 shows a cam surface 60 on the circumferential surface of the rotating cam circle 6 and a valley surface M and a valley. A case is shown in which four pairs of surfaces V are formed and the cam body 6 is divided into four equal parts to make four strokes in one rotation.
In FIG. 6, eight pairs of a crest surface M and a trough surface V are formed on the cam surface 60 on the peripheral surface of the rotating cam circle 6, and the cam body 6 is divided into eight equal parts to make eight strokes in one rotation. Although the case is shown, the cam body 6 may be divided into an appropriate plurality.

  The tip of the needle is brought into contact with the peripheral surface 60 of the rotating cam circle 6 to select cam operation. Referring to FIGS. 5 and 6, the operation of the cam on the rotating cam circle is shown in FIG. 5, where FIG. A shows the OFF operation / needle ascent position, b shows the ON operation / needle descending, and FIG. Indicates OFF operation and needle lowering position.

The valve body drive mechanism 2 which is the principal part of this invention is demonstrated.
About the valve body drive mechanism 2,
An inner chamber 22 is formed in the upper part of the housing 10 of the suck back type adhesive supply control valve mechanism,
The movable valve body and the needle are integrally and vertically moved through the connecting body 41 provided in the inner chamber 22.
In the embodiment, the coupling body 41 is composed of an upper coupling tool 41a and a lower coupling tool 41b that are engaged with each other in the vertical movement direction, and the upper coupling tool 41a is fixed to the lower part of the needle via a fixing tool 42. The lower connector 41b was fixed to the upper part of the movable valve body via the fixing tool 43.

A magnet is provided on the bottom surface of the inner chamber 22, and a magnetic force between the connecting body 14 and the lower connector 41b of the connecting body 14 biases the needle to a rising force, thereby constantly biasing the OFF operation.
Therefore, in the state of FIG. 3 where the tip of the needle is in contact with the crest surface of the cam surface, the needle is pushed down against the biasing force of the above-described magnetic action, so that the movable valve body Is the position of the ON operation.
As the tip of the needle moves away from the crest surface of the cam surface, the above-mentioned magnetic force causes the upward force. The movable valve body is automatically pushed up to the OFF operation position. In the contact state with the valley surface, the position is surely the ON operation position.

FIG. 7 is an explanatory diagram of a coating state, and shows a coating mode in an example under the following conditions.
Cam body ------------ 4 split cam rotation ------------ 400rpm-Servo motor ON / OFF operation time ------ 30ms
Number of responses ----------- 2000 / min Application length ------------ 2.5mm
Coating pause length ---------- 7.0 mm

  In the above description, the coating head 1 is a coater type, and the coating substrate is a sheet-like nonwoven fabric.

  Next, an embodiment in which the coating head 1 is a comb nozzle will be described with reference to FIGS.

FIG. 9 shows a liquid adhesive high-speed intermittent application device A ′ equipped with a comb nozzle application head 1 ′ shown in FIG. 10, and the application base material is a stretched string-like stretchable body (thread rubber).
FIG. 11 shows a state in which thread rubber to which an adhesive is intermittently applied is applied to a nonwoven fabric, and FIGS. 12 and 13 show an intermediate product completed with thread rubber as a natural length, that is, a composite elastic member with breezes.

  With reference to FIG. 13 and FIG. 14, the Example of the liquid adhesive intermittent application system of this invention 2 is demonstrated.

.
A plurality of liquid adhesive intermittent coating apparatuses A having the valve body driving mechanism 2 having the above-described configuration are arranged in parallel.
A single common rotating shaft 61 is provided as a rotating shaft for the rotating cam circle of each of the valve body driving mechanisms for a plurality of suck back type application gun units.

The common rotating shaft 61 is equipped with a servo motor M1.
The servo motor M1 is synchronously operated with the motor M2 for the driving roller 71 of the substrate traveling line via the servo control unit 70.

  The second invention of the present application has an effect of making the position and application length of the intermittent application section accurate by setting the application timing through rotation control of the rotating cam circle. Further, by servo-controlling the traveling speed of the coated substrate and the rotation of the rotating cam circle, the position and coating length of the intermittent coating section can be accurately maintained regardless of changes in the traveling speed of the coated substrate.

  The liquid adhesive high-speed coating system of the present invention reduces the manufacturing cost, operation cost, and maintenance cost of the liquid adhesive coating line, and the industrial development of the body fluid absorbing products such as paper diapers using composite elastic members It contributes to.

DESCRIPTION OF SYMBOLS 1 Suckback type adhesive supply control valve mechanism 2 Valve body drive mechanism 3 Adhesive application head 5 Needle 6 Rotating cam circle 10 Housing 11 Movable valve body

Claims (2)

A rotating cam circle having a plurality of pairs of crests and troughs is provided on the peripheral surface, a needle integrated with a movable valve body of a suck back type adhesive supply control valve mechanism is provided, and the tip of the needle is Equipped with a liquid adhesive intermittent application system having a valve body drive mechanism configured to contact the peripheral surface of the rotating cam circle,
An inner chamber 22 is formed in the upper part of the housing 10 of the suck back type adhesive supply control valve mechanism,
The movable valve body and the needle are integrally and integrally moved up and down via the connecting body 41 provided in the inner chamber 22,
A magnet is provided on the bottom surface of the inner chamber 22, and a magnetic force is applied to the connecting tool to urge the needle to a lifting force, to always force the OFF operation, and to contact the cam surface with the mountain surface. A liquid adhesive intermittent coating apparatus characterized by being turned on. A rotating cam circle having a plurality of pairs of crests and troughs is provided on the peripheral surface, a needle integrated with a movable valve body of a suck back type adhesive supply control valve mechanism is provided, and the tip of the needle is A liquid adhesive intermittent application device having a valve body drive mechanism configured to contact with the peripheral surface of the rotating cam circle is configured, and an inner chamber 22 is provided above the housing 10 of the suck back type adhesive supply control valve mechanism. The movable valve body and the needle are integrally moved up and down integrally via the connecting body 41 formed in the inner chamber 22 and equipped with a magnet located on the bottom surface of the inner chamber 22. And a liquid adhesive coating device that energizes the needle with a rising force by a magnetic action, constantly urges the needle to turn off, and turns on when it contacts the mountain surface of the cam surface. A plurality of parallel arrangements,
Servo that makes the rotation axis for the rotary cam circle of the valve body drive mechanism of each of the plurality of suck back type application gun units a single common rotation axis, and synchronizes the common rotation axis with the traveling speed of the coating substrate A liquid adhesive intermittent application system which is driven by a motor.

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