JPS62277177A - Coating device for high-viscosity material - Google Patents

Abstract

PURPOSE:To uniformly coat a high-viscosity material to the toric point to be coated of a material to be coated by providing a nozzle turning cooperatively with a revolving shaft provided to a coating head and operating an opening/ closing mechanism of a flow passage in association with the rotating speed of the revolving shaft. CONSTITUTION:The coating head 7 is provided to face the material 33 to be coated and the revolving shaft 8 which is rotated by a driving mechanism 10 is disposed to the coating head 7. The nozzle 9 coats the high-viscosity material to the point to be coated of the material to be coated by swiveling linked with the shaft 8. The flow passage communicating at one end with a high-viscosity supplying source and at the other end with the nozzle is provided to the coating head. The opening/closing mechanism is provided to the flow passage thereof. The above-mentioned opening/closing mechanism is opened and closed in association with the rotating speed of the shaft 8 in the control means to control the coating timing by the time determined according to the coating conditions for the point to be coated. As a result, the high-viscosity material is uniformly coated to the point to be coated of the material to be coated having the point to be coated existing in a toric shape with desired space.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Object of the invention] (Industrial application field) This invention automatically applies a high viscosity material such as grease to an annular application point of a workpiece. Application of high viscosity materials to be applied to! Regarding fc cliff.

(Prior Art) Conventionally, there are apparatuses for applying high viscosity materials such as grease, which use an extrusion method that utilizes the elastic force of a chain, or which apply a certain amount of liquid to a container that has been transferred to a small cartridge. When using these to apply to a large number of parts on an automatic assembly line, the extrusion type does not apply uniformly due to pulsation, and the cartridge type does not allow stable extrusion of rounded grease due to air being mixed in. Therefore, it was necessary to manually operate a valve having an opening/closing mechanism in the grease flow path to which a constant pressure was applied to confirm whether or not the grease was being discharged. Furthermore, even though the grease is applied on the circumference, there is a time delay in applying the remaining balls at the starting and ending points on the circumference. That is, even if N is opened at the starting point, the grease is not immediately discharged, and a large amount of grease is applied to the stagnant portion at the ending point.

(Problems to be Solved by the Invention) This invention has been made in consideration of the above circumstances, and its purpose is to apply a high viscosity material such as grease to an annular application point of the object to be applied. Coating device i for high viscosity materials that coats uniformly! Our goal is to provide the following.

[Structure of the invention]

(Means and operations for solving color spots) In order to achieve the above object, the present invention provides a coating head opposite to the object to be coated, and this coating head is provided with a rotating shaft rotatably. It is equipped with a nozzle that rotates in conjunction with the rotating shaft. The spreading head is also provided with an optical path through which the high viscosity material flows, one end of which communicates with a supply source of the high viscosity material, and the other end communicates with the nozzle. This optical path is provided with an opening/closing mechanism in the middle thereof, and this opening/closing mechanism is operated by a control means provided in the coating head in relation to the rotational speed of the rotating shaft to control the coating timing.

(Embodiment of the Invention) An embodiment of the invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes a support stand, and a guide table 2 is fixed to the front surface of the support stand 1 with bolts 3. On the front surface of this guide table 2, a slider 4 is guided by guide rails 5.5 and is slidable in left and right directions. A vertical cylinder 6 is fixed to the slider 4, and a coating head 7 is attached to the vertical cylinder 6. Therefore, this coating head 7 is supported by the support base 1 and is movable in the horizontal and vertical directions. A rotary shaft 8 is fitted into the coating head 7 so as to be rotatable in the vertical direction. and,
A nozzle 9 is provided at the tip of the rotary shaft 8 so as to be eccentric from the center line 8a of the rotary shaft 8 by a distance l. Therefore, when the rotating shaft 8 rotates, the nozzle 9 rotates on a circumference having a radius equal to the distance 1. A motor 10 as a drive mechanism is provided above the coating head 7.
is attached to the vertical cylinder 6 via a bracket 11. As shown in FIG. 4, the coating head 7 is provided with a flow path 12 through which a high viscosity material such as grease flows. One end of this flow path 12 communicates with a grease supply tank 13 as a high viscosity material supply source, and the other end communicates with the nozzle 9. The grease supply tank 13 has a double structure as shown in FIG. That is, the inner tank 1 is inside the outer tank 14.
5 is accommodated. Grease 16 is stored inside this inner tank 15, and a pressure plate 1 is provided on the inner wall.
2 are fitted airtightly and slidably. Also, the grease distribution hose 18 is connected through the lid 14a of the outer tank 14.
and an air hose 19 are inserted into the outer tank 14. The grease distribution hose 18 is connected to the above-mentioned pressure V-Lf ke 4 spring 1 y value A'/each 1 (inner fg λ chadahiki-). Also, the air hose 19 is connected to the outer tank 14FF.
Air of 'y/aA is supplied to parts 2 to 4 to pressurize the grease 16. The other end of the grease distribution hose 18 communicates with the distribution passage 12 via a socket 20 provided in the application head 7. This flow path 12 is provided with an opening/closing mechanism 2) as shown in FIGS. 3 and 4. This opening/closing mechanism 21
is a pulp passage 22 provided perpendicularly to the above-mentioned flow passage 12.
A pulp 23t is provided inside so as to be movable forward and backward, and the optical path 12 is opened and closed by moving the pulp 23 forward and backward in the direction of the arrow with a cylinder 24. The above (Lupu 2)
3 is provided with a through hole 23m perpendicular to the axial direction.

Then, the pulp 23 advances and retreats within the pulp passage 22, and the sixth
As shown in the figure), the through hole 23m of the wrap 23 is connected to the flow path 12.
Grease 16 passes through four through holes 25 formed in the peripheral wall of rotating shaft 8 and through a circulation hole 26 formed along the center line of rotating shaft 8, and then passes through nozzle 9. It is designed to be discharged from Also, a stopper 27 is installed in the pulp 23, and the flow path 12 and the flow hole 2 are connected to each other.
6 are in communication with each other, the stopper 27 comes into contact with the wall surface of the groove 28 formed in the coating head 7. Furthermore, the cylinder 24 for advancing and retracting the pulp 23t' is operated by a signal from a control means 29 provided in the coating head 7. This control means 29 includes a sensor 30 for detecting the rotation speed of the rotating shaft 8, and a detection plate 3.
It consists of ノ and. The sensor 30 is mounted parallel to the drive shaft of the motor 8.

The detection plate 31 is connected to the drive shaft of the rotating shaft 8 via a reduction gear train and rotates. As shown in FIG. 7, one notch 31a is provided on the surface of the sensor 30 on the circumference so as to face the sensor 30. As shown in FIG.

On the other hand, below the coating head 7 is an index table 3.
2 is rotatably attached. A housing 34 for fixing a spring 33t as an object to be coated is attached to the upper surface of the index table 32. This housing 34 is the upper housing J4a
and the lower housing 34b, and the spring 33t is clamped and fixed between them. Nine, the spring 33 has a large number of radial spring pieces 33.
a is formed. The spring piece 33a has annular projecting ends P serving as application points at desired intervals, and the grease 16 is applied thereto.

The distance between the protruding end P of the spring piece 33a and the nozzle 9 is kept constant by the housing 34. Further, the height of the upper surface of the housing 34 is adjusted in the previous step.

The index table 32 has x as shown in FIG.
, 82F! Can attach type A objects to be coated.90'
It is designed to operate at the timing of coating with intermittent rotation. Therefore, the support stand 1 has a cylinder 35 for model change.
is provided. The tip of the operating rod 36 of this cylinder 35 is connected to the coating head 2 via a bracket 37t.

By operating the cylinder 35, the stop position 11 of the nozzle 9 is switched from 9, for example, model A to 8. In addition, sensor 3 detects this model switching.
8 is provided on the coating head 7.

The operation of the invention configured as described above will be explained.

First, when the housing 34t with the spring 33 attached to the index table 32 is set in the mounting position of model A in FIG. 11, the motor 10 that drives the rotating shaft 8 is started. At this time, the rotation sensor 30 detects the rotation of the nozzle 9, and at the same time the cylinder 24 operates, and the pulp 23 moves to the left in FIG. 4, opening the flow path 12 for the grease 16. Accordingly, the pressure plate 17 of the inner tank 15 of the grease supply tank 13 is
Since the nitrogen in the pulp 23 is pressed, the grease flows into the flow path 12 through the through hole 23a provided perpendicularly to the pulp 23 via the grease flow hose 18.

The flow then flows from the flow path surrounding the outer circumference of the rotary shaft 8 through the four through holes 25 formed in the outer circumferential wall of the rotary shaft 8 into the flow holes 26 provided along the center line of the rotary shaft 8, and then flows into the nozzle. It flows out from the tip of 9.

This nozzle 9 rotates about the center line &ai of the rotating shaft 8, and applies grease 16t to the protruding ends of the spring pieces 33a, which are application points of the lower spring 33. Then, after the opening/closing mechanism 21 is opened and receives a predetermined electricity No. 1, the cylinder 24 retreats and the pulp 23 closes the flow path 12.

Even if the flow path 12 is closed, the pulp 2 will still flow from the tip of the nozzle 9.
Grease 16 remains between 3 and 3, and this grease 16 flows out from the nozzle 9 due to residual pressure.
After rotating the motor 10 for 2 to 3 more rotations,
t-stop. Since the distance between the tip of the nozzle 9 and the protruding end P of the spring 33 as the object to be coated is constant, the thickness of the grease 16 at the protruding end P is kept constant. Furthermore, when the pulp 23 of the opening/closing mechanism 21 opens, the amount of grease 16 flowing out is determined from the grease supply tank 1 at the time of design.
The pressure inside the outer tank 14 of No. 3, the inner diameter of the nozzle 9, etc. are set, but in the case of actual application, the time is set as described above.

Furthermore, when model A is switched to model B, the sensor 38 senses this, and after detecting the starting point, the sensor 30 and the detection plate 31 set the time for the coating amount corresponding to the B mechanism, and the cylinder 24 controls the opening/closing mechanism 2. The operation of controlling the coating timing by operating the button is the same as in machine f18, so the explanation thereof will be omitted.

As in the above embodiment, the replenishment of the grease 16 is carried out using the inner tank 1st cartridge type, which solves the problem of air being mixed in when replacing the grease, and also eliminates the need for tiring hands.

9. As for the coating device on the circumference, only continuous coating will be explained, but this continuous coating is not the only thing that is possible. In other words, since the coating is started and the grease discharge time is set based on the signal from the detection object, by considering the rotational speed of the motor, it is possible to apply the grease to any point on the circumference with synchronization. Continuous application is also possible. Further, by setting the detection body in accordance with the coating position of the fabric, it is possible to coat only the necessary areas on the circumference. The senna detects the detected object corresponding to information from multiple points during one rotation of the pick.

Coating can be done in accordance with the timing.

〔Effect of the invention〕

As explained above, since the present invention is constructed as described above, it is possible to prevent uneven coating due to residual balls of high-viscosity material and to uniformly coat the material. Furthermore, in the case of machine quadruple switching, the coating amount can be changed automatically without human intervention.

Further, the high viscosity material can be formed as a layer of constant thickness on the object to be coated. Furthermore, since stable coating can be performed on a large amount of objects in a short period of time, it can be used in automated lines. #L The amount of coating can be adjusted without any modification without modifying the equipment. Also,
Since the high viscosity material supply source is provided outside the apparatus and the high viscosity material is introduced into the rotating shaft, a nozzle can be provided at the tip of the rotating shaft, and the structure can be simplified.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a front view showing the configuration of the device, and FIG. 2 being a side view. 3 is a longitudinal side view showing the opening/closing mechanism, FIG. 4 is a transverse plan view showing the opening/closing mechanism, FIG. 5 is a longitudinal side view showing the high viscosity material supply source, and FIG. 6 is the opening/closing machine Ill. is a cross-sectional view along the axial direction of the valve, [B] is a cross-sectional view of the pulp perpendicular to the axial direction, Fig. 7 is a plan view showing the detection plate, and Fig. 8 shows the housing that holds the object to be coated. A longitudinal side view, FIG. 9 is a plan view showing the object to be coated, FIG. WJ10 is a sectional view taken along the line X--X in FIG. 9, and FIG. 11 is a plan view showing the index table. 7... Application head, 8... Rotating shaft, 9... Nozzle, 10... Motor (drive mechanism), 12... Distribution path,
13... Grease supply tank (high viscosity material supply source),
21... Opening/closing mechanism, 29... Control means, 33...
Spring (object to be coated), P...Protruding end of spring (point to be coated). Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 5 (A) (B) Figure 6 Rod 7 M Figure 8 Figure 9 Figure 1o

Claims (1)

[Claims] In a coating device that applies a high viscosity material to a coating point of a workpiece, the application points of which are arranged in a ring with desired intervals, a coating head provided opposite to the workpiece, and the application head. a rotating shaft provided in the coating head and rotated by a drive mechanism; a nozzle that rotates in conjunction with the rotating shaft to apply a high viscosity material to a coating point of the object to be coated; The supply source includes a flow path whose other end communicates with the nozzle, an opening/closing mechanism provided in this flow path, and a rotational speed of the rotating shaft. 1. A high viscosity material coating apparatus, comprising: a control means for controlling coating timing according to a predetermined time.