JPS6159188B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for forming a coating of a viscous liquid such as metallizing paste on the end face of a cylindrical or cylindrical porcelain member. These porcelain members include ceramic parts such as pipes with decorated ends, metallized ceramic parts, and the like.

Conventional technology In the past, for example, a cylindrical porcelain member was placed on a potter's wheel connected to a drive motor, positioned using U-shaped claws, etc., and the potter's wheel was rotated to rotate the porcelain member. A coating layer is formed by dropping viscous metallizing paste onto the end surface from a nozzle, or by connecting a potter's wheel with a drive motor and a vacuum device to fix a porcelain member by suction and rotating it. Painting methods were used to give this effect.

Problems to be Solved by the Invention In these devices, a gap is required for the rotation between the claw pieces, so the porcelain member moves eccentrically during rotation during the gap, so it may not be possible to apply the product to a predetermined area. The disadvantage is that the paste flows on the inner and outer surfaces, and when the diameter of the porcelain member is small or the wall thickness is thin, a frictional force sufficient to transmit the rotation of the potter's wheel is not generated at the contact area between the potter's wheel surface and the porcelain member. Also, the porcelain member could not be sufficiently vacuum-adsorbed onto the potter's wheel surface. As a result, it is not possible to rotate the porcelain member at a constant speed, so there is a drawback that it is not possible to form a metallized coating layer with precision and uniform thickness on the end face of the porcelain member.
Another drawback was that viscous metallizing paste material dripped onto the inner and outer surfaces of the member due to the vacuum.

Means and Embodiments for Solving the Problems The present invention has been made in view of these problems of the prior art. A movable potter's wheel, a vertically movable nozzle located above the potter's wheel for dripping metallizing paste material onto the end surface of the porcelain member, and a roller that contacts the side surface of the porcelain member and holds it from three directions, These rollers include an elastic drive roller at a fixed position that rotates the porcelain member, an elastic positioning roller that is rotatable and movable horizontally back and forth toward the center of the potter's wheel surface, and a rotating elastic roller at a fixed position. A cylindrical or circular shape comprising a freely movable rigid positioning roller, and at least one of the elastic rollers is held at an angle so that the rotation axis of at least one roller approaches the central axis of the potter's wheel at a position above the porcelain member. This is a coating device for the end faces of columnar porcelain members.

The embodiment will be explained based on the configuration of the main parts shown in FIGS. 1 and 2.
A cylindrical porcelain member 5 is placed on top, and this is connected to one driving roller 1 and two positioning rollers 2, 3.
The metallizing paste material is dripped from the nozzle 6 onto the end surface of the porcelain member 5 by applying rotation while securing a predetermined position by pinching the sides of the porcelain member 5 from three sides. In this case, the nozzle 6 is preferably located on the end surface of the article on or near the center line of both the positioning roller 2 and the potter's wheel 4, and the drive roller 1 is made of an elastic member to increase the contact friction with the porcelain member. , for example using a rubber ring. The positioning roller 2 is a metal roller that is rotatable in a fixed position, and the contact with the ceramic member 5 is made by a metal surface, and the roller is in rigid contact with each other. A nozzle 6 of viscous metallizing paste material is positioned on the end face of the ceramic member 5 near the contact position. The positioning roller 3 is a movable roller that can advance and retreat toward the axis of the potter's wheel 4, and its forward movement positions the porcelain member, and is rotatably supported to increase contact friction. Therefore, use a rubber ring. Since the positioning roller 2 is a rigid roller, it controls eccentricity caused by the elastic deformation of the other two rollers using rubber rings. As shown in Fig. 2, the positioning roller 3 is installed above the porcelain member with its rotational axis A ₃ inclined slightly toward the center axis A ₄ of the potter's wheel, so that It is configured to generate a downward pressing force to prevent floating. FIG. 3 is a plan view of the operating state,
Initially, the positioning roller 3 is in the retracted position 3', and the drive roller 1 rotates at the same time as the pusher 11 is advanced to feed the porcelain member on the feeding path 8 onto the freely rotating potter's wheel 4 held by a bearing. Start. Next, the positioning roller 3 advances to its abutting position, and the porcelain member 5 is held from three sides and rotated by the rotational action of the drive roller 1;
At the same time, the freely rotating potter's wheel also rotates, and the positioning rollers 2 and 3 also rotate at the same time. At this time, the porcelain member is attached to the rotation axis A 3 of the positioning roller _3.
is inclined so as to be close to the potter's wheel axis A ₄ above the porcelain member, so a pressing force is generated against the potter's wheel surface at the contact portion of the porcelain member 5, preventing the porcelain member 5 from floating and improving its normal operation. Hold rotation. Along with this rotation, the coating nozzle 6 descends,
A paste material is dropped onto the end surface of the rotating ceramic member 5 after stopping for a certain period of time, and a paste coating layer is formed along the entire circumference of the end surface as the ceramic member 5 rotates. After the coating is finished, the positioning roller 3 retreats to the 3' position, and at the same time the driving roller 1 stops. A detailed explanation of the entire device can be found in Figures 7 and 8.
The figures are a plan view and a front view, respectively, showing the entirety of an embodiment of the manufacturing apparatus of the present invention, in which 1 is the driving roller, 2 and 3 are positioning rollers, and 4
The potter's wheel 4 is embedded flush with a horizontally moving slide plate 12 for take-out. 5
is a cylindrical piece of porcelain member of the article to be painted. The nozzle 6 is movable in the vertical direction with respect to the potter's wheel 4 surface. The porcelain members 5 are stacked in bulk in a parts feeder (not shown) connected to the feeding path 9 of the machine base 7, and are continuously fed while being oriented so that the end faces are in the vertical direction due to its vibration. Ru. The stopper 10 temporarily stops the progress of the porcelain member, but the pusher 11 pushes the porcelain member against the stopper 10 on the feeding path 8 towards one positioning roller 2 and on the potter's wheel 4 surface. The pusher 11 returns to its original position. Subsequently, the positioning roller 3 made of an elastic material is operated, and the porcelain member is brought into contact with the drive roller 1 and the positioning roller 2 and stopped. The porcelain member is held and positioned by three rollers on its sides from three directions, and at the same time is given rotation by the drive roller 1.As the porcelain member 5 rotates, the potter's wheel also rotates, and the two positioning rollers 2 , 3 will also start rotating. The positioning roller 2 is an inelastic rigid roller, and even if there is a variation in the dimensions of the porcelain member, the variation is absorbed by the other two elastic rollers and the position of contact between the rigid roller 2 and the porcelain member is adjusted. does not change, and therefore the relative position between the end face of the porcelain member and the nozzle 6 is always kept constant, and the metallizing paste from the nozzle 6 is accurately dripped onto the predetermined end face of the porcelain member, and is pasted onto the end face of the porcelain member. It is something that is applied. After a certain period of time has elapsed, the nozzle 6 rises to complete the coating process, and at the same time the drive roller 1 stops rotating, and at the same time the positioning roller 3 also retreats and returns to its original position 3'. After the positioning roller 3 has finished retreating, the potter's wheel 4, with the porcelain member placed thereon, retreats in the horizontal direction together with the slide plate 12, and removes the porcelain member from below the nozzle. When the slide plate 12 moves to a position where the porcelain member faces the discharge path 14 shown in FIG. 7 and stops, the pusher 13 is operated to push the porcelain member from the potter's wheel surface to the discharge path 14, and then the porcelain member is transferred to the next step, such as a drying step. Instigate. The slide plate 12 returns to its original position while holding the potter's wheel 4, and the next porcelain member fed onto the potter's wheel surface from the feeding path 8 is held by three rollers and rotated, and the coating operation described above is repeated. It is something. Note that the arrangement of the three rollers does not necessarily have to be in a 120° divided position. The guides 15 and 16 are adjustable in the width direction so that the width of each feeding path can be changed depending on the diameter of the article. Further, 12' is a guide for the slide plate 12.

The present invention has the above-mentioned configuration, and includes one elastic drive roller at a fixed position, a rigid positioning roller at a fixed position, and a second elastic positioning roller that can move back and forth toward the potter's wheel axis. The sides of the article are held between the sides, and when the article is rotated, it is held and positioned on the potter's wheel, and an elastic roller having a rotation axis inclined to the rotation axis of the article is placed against the rotating porcelain member. Generates a pressing action that presses against the potter's wheel surface, preventing the object from lifting and at the same time greatly reducing problems such as eccentricity and uneven rotation, ensuring highly accurate metallizing paste dripping onto the edge of the object. Realize,
We were able to improve the painting process and increase the rate of non-defective products. The reason why this potter's wheel is made to rotate freely is to avoid the following problems. In other words, if the potter's wheel does not rotate freely, when an end face of a porcelain member is painted and then the opposite end face is painted, the metallized material on the already painted end face will be scraped off due to contact friction. The potter's wheel is supported by a sliding member that can slide horizontally, and both are formed on the same plane, making it easy for objects to enter onto the potter's wheel surface at the painting work position, and objects after being painted can be placed on the slide. The article is transferred by being placed on a potter's wheel surface supported by a plate, which is convenient for discharging and transferring the article to the next process. In this way, the feeding, coating, and discharging of articles can be carried out continuously and repeatedly, greatly contributing to improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a line of arrangement of the porcelain member to be coated, each roller, and the potter's wheel when carrying out the method of the present invention, and Fig. 2 is a plan view of the A-- FIG. 3 is a plan view of the main parts of the apparatus of the present invention, FIG. 4 is a perspective view of an example of a ceramic member to be coated, and FIGS. 5 and 6 are views of the main parts. 7 is a plan view of the entire device, and FIG. 8 is a front view taken along the line X--X' in FIG. 7. DESCRIPTION OF SYMBOLS 1... Drive roller, 2, 3... Positioning roller, 4... Potter's wheel, 5... Porcelain member, 6... Nozzle.

Claims (1)

[Claims] 1. A rotatable potter's wheel that supports a cylindrical or cylindrical porcelain member and is flush with the supply/discharge path, and a vertically movable potter located above the potter's wheel that drips metallizing paste material onto the end surface of the porcelain member. an elastic drive roller in a fixed position, comprising rollers that contact the nozzle and the side surfaces of the porcelain member and hold the same from three directions, and these rollers apply rotation to the porcelain member;
It consists of an elastic body positioning roller that is movable back and forth in the horizontal direction toward the center of the potter's wheel surface and is rotatable, and a rigid body positioning roller that is in a fixed position and rotatable, and at least one of the elastic body rollers. A coating device for the end face of a cylindrical or columnar porcelain member, characterized in that the rotating shaft of the roller is held at an angle above the porcelain member so as to approach the central axis of the potter's wheel.