KR101947409B1

KR101947409B1 - Application Device

Info

Publication number: KR101947409B1
Application number: KR1020170098478A
Authority: KR
Inventors: 마르틴 로이터
Original assignee: 마르코 시스템애널라이즈 운트 엔트비크룽 게엠베하
Priority date: 2016-08-04
Filing date: 2017-08-03
Publication date: 2019-02-13
Also published as: KR20190005812A; DE102016114502B4; CN107685001A; KR20180016303A; DE102016114502A1

Abstract

The applicator for applying liquid media includes a rotating disk rotatable about a rotational axis and having a valve seat and a valve outlet channel extending at an angle to the rotational axis.

Description

[0001]

This application claims priority from German Patent Application No. 102016114502.5, filed on August 4, 2016, entitled " APPLICATION SAVORRICHTUNG ", which is hereby incorporated by reference in its entirety for all purposes .

The present invention relates to an application device for applying liquid media such as, for example, adhesives, coatings and the like.

In the manufacture of electronic components and devices, gluing processes are required in many manufacturing steps. To prevent damage to the workpiece or structural elements on the workpiece, the adhesive is applied without contact by a so-called jet valve. Such a valve is also used for so-called underfilling, in which the element is filled on the circuit board to mechanically stabilize it. Typically, the media is applied to the workpiece perpendicularly to each workpiece, whereby the valves and workpieces are arranged relative to one another with the aid of a multi-axis robot. Typically, such robots have three axes, two axes for movement in the plane of the workpiece and one axis for movement vertically to the workpiece. The workpiece and the division of the axes on the valve can be different, i.e. the workpiece and / or the robot can be moved relative to the workpiece.

However, in the case of many dosing devices it is advantageous to apply the media at a fixed angle, rather than vertically, for example if the material is to be applied to the edges and the medium covers both sides of the plane and the plane perpendicular . Inclined application is also advantageous for the underfill process. However, since the distance between the valve and the workpiece must be small for stable and precise dosing (the precise location of the applied media must be kept very precise), the design of known jet valves does not allow inclined installation in robots. Moreover, application of the media is typically not done along one edge of the workpiece or one element of the workpiece, but typically along two or even a few corners. When the valve is mounted obliquely on the robot, an additional robot axis for rotating the valve is required. Due to the electrical and / or pneumatic supply also required due to the supply of media required for the valve, rotation of 360 degrees or greater can only be achieved with great effort.

It is an object of the present invention to provide a coating device for application of a liquid medium which enables tilting of the medium in a cost-effective manner.

This object is achieved by the features of claim 1 and in particular comprises a rotating disc mounted on a base body so as to be rotatable about a rotational axis, the rotating disc comprising a valve seat and an outlet channel extending obliquely to the rotational axis Lt; / RTI > Furthermore, the application device has a valve needle that can be adjusted to be supported on the valve seat.

With the application device according to the present invention, the tilting of the media can be accomplished in a simple manner without the need for an additional robot axis. Due to the outlet channel facing in an oblique direction with respect to the axis of rotation which can be directed to an arbitrary angular position by rotation of the rotating disk, the outlet channel is positioned in a simple manner so as to have an outlet opening, . For example, the outlet channels of the rotating disk may be arranged at an angle of 45 ° to the axis of rotation, and other angles greater than 0 ° are also possible depending on the application requirements.

Advantageous embodiments of the invention are described in the detailed description, drawings and the dependent claims.

According to the first embodiment, the valve needle can be rotatably mounted about the rotational axis. As a result, the valve needle can be rotated with respect to the base body with the rotating disc when the valve is closed, since in this state the valve needle is pressed against the valve seat and rotates therewith during rotation of the rotating disc.

According to another embodiment, a rotating bearing for a valve needle and / or a rotating bearing for a rotating disk may be provided in the base body. As a result, the rotary disc and the valve needle can be rotated with a small frictional force with respect to the base body, and independent rotation of the rotary disc and the valve needle about the rotary axis can be realized.

Particularly flexible positioning can be achieved by allowing the rotating disk to rotate relative to the base body in any direction without any angular limitations.

If the rotating disk is in the form of a circular disk and particularly on its outer circumference, it can be mounted on the outer circumferential surface of the rotating disk in a particularly simple manner so that the actuator can rotate it. In this case, particularly accurate behavior of the rotating disk can be achieved by the teeth. However, other force transmission mechanisms such as belts or chain actuators may also be used.

According to another embodiment, the valve needle can be subjected to a spring load, and in particular can have a valve ball at one end. Thus, the valve needle can be biased by the spring to the closed or open position. When the valve needle is biased to its open position by the spring, an advantageous effect is achieved that the rotary disk can be rotated with a particularly low frictional force when the valve is opened.

It is advantageous if this is provided in the insert of the rotary disk in order to enable the replacement of the valve seat at the time of wear. It may be advantageous if an outlet channel is provided in the insert of the rotating disk, since in this case it can be differently inclined by exchanging inserts or outlet channels of different dimensions can be selected.

According to another embodiment, the cross section of the outlet opening of the outlet channel may be formed to be perpendicular to the longitudinal axis of the outlet channel. Compared to the cross-section of the outlet opening which is formed obliquely to the longitudinal axis of the outlet channel, this leads to improved droplet formation as a result of the separation edge defined in the droplet forming area.

According to another embodiment of the present invention, the application device may have a rotary encoder for detecting the position of the rotary disk. To this end, one or more magnet elements may be integrated into the rotating disk to detect the exact position of the rotating disk and thereby synchronize the rotation of the rotating disk or the rotation of the rotating disk with the behavior of the applicator in space have. In this case, the actuators of the rotary encoder and the rotary disc can be connected to the electronic controller of the dosing device, and as a result precise synchronization between the dosing and the rotary motion is possible.

In another embodiment, the dispensing device may be configured as an exchange module to the dosing device to enable rapid dispensing of the dispensing device for other dosing devices.

According to a further aspect of the present invention there is provided a spring for a valve needle of the applicator as described above, the spring having a disc-shaped body in which a central opening is arranged in the center and a slot in the form of a spiral- . The spring is thus formed by a disk in which a spring arm is formed which is bent between two adjacent helical arms and integrally connected to the disk. When a force is applied to the disc-shaped body in the peripheral region of the central opening, all spring arms are uniformly spring-deformed, resulting in a precisely adjustable restoring force. Such a spring is particularly suitable for pre-tensioned rotary elements such as, for example, the valve needle described above. Such an element may have an outer diameter smaller than the diameter of the central opening in an area located within the central opening whereby the element can rotate in the central opening under low frictional forces.

Particularly simple manufacture of the spring is possible when the body and / or central opening is round when seen from above, especially when it is circular.

Finally, it is advantageous to have at least four, in particular at least six, and preferably at least eight, in particular exactly eight slots, which allows for a particularly good and well- Because.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described, by way of example, with reference to the preferred embodiments and the accompanying drawings.

1 is a sectional view of a coating device.
2 is a perspective view obliquely viewed from the top of the applicator of FIG.
Figure 3 is a bottom view of the applicator of Figures 1 and 2 connected to a driver.
4 is a side view and a plan view of the spring of the applicator of Figs.
5 is a partially enlarged view of Fig.

Fig. 1 shows an application device for application of a liquid medium comprising a base body 10 consisting of two substantially parallelepiped elements 12, 14 screwed together. A rotary disk 16 rotatable with respect to the rotary axis A is rotatably mounted on the base body 10.

A first insert 18 and a second insert 20 are provided on the rotating disk 16 coaxially with the rotational axis A and the second insert 18 and the second insert 20 are provided on the rotating disk 16, The insert 20 is aligned with the rotating disc 16.

A valve seat 22 is formed in the first insert 18 and a valve needle 24 mounted on the base body 10 coaxially with the axis of rotation A is adapted to be supported thereon. The valve seat 22 is closed by the valve needle 24 and more particularly by the valve ball 26 which is urged against the lower end of the valve needle 24 when a force is applied to the valve needle 24, . In this manner, a through-hole (not shown) is formed in the first insert 18 coaxially extending with the axis of rotation A and connected to the passage channel 25 formed coaxially with the rotational axis A in the second insert 20 The ball channel 23 is closed. The lower end of the coaxial channel 25 is formed in the second insert 20 and connected to an outlet channel 28 which extends in a straight line and whose axis extends at an angle of about 45 degrees with the axis of rotation A. [ As a result, the outlet channel 28 is connected to the free space 30 formed at the lower side of the second insert 20 and is connected to the cross section of the outlet opening of the outlet channel 28, The orifice is perpendicular to the longitudinal axis of the outlet channel 28.

The second insert 20 is screwed to the rotating disc 16 and supports the first insert 18 and a seal 27 is provided on the inserts 18 and 20 in the area of the channel channels 23 and 25. [ Respectively.

As further shown in FIG. 1, a ball bearing 32 for the rotating disk 16 is provided on the base body 10, on the other hand. On the other hand, the valve needle 24 is rotatably mounted on a rotary bearing insert 34 which is inserted into the corresponding receiving bore from the upper side of the element 12. [

As further shown in FIG. 1, the valve needle 24 has a reduced diameter portion 24A at its upper end portion, which portion 24A is inserted by a spring 40 shown in detail in FIG. 4 .

4, the spring 40 is formed of a disk-shaped body 42 and a central opening 44 extending therethrough and extending through the body 42 is formed therein. In plan view, the central opening 44 is round and particularly circular, i.e. a round hole is in the center of the body 42.

A plurality of slots 46 in the form of helical arms extending from the central opening 44 in the direction of the outer periphery of the body 42 and passing through the body 42 are provided in the base body 42 or disc 42).

In the exemplary embodiment, a total of eight slots are evenly distributed on the disk 42 and are spaced apart from one another, and the radially outward end thereof is provided with a circularly enlarged end area 48. [ As a result, a spring arm 50 integrally connected to the body 42 is formed between the two slots 46, respectively.

4 and 1, the valve needle 24 is inserted such that its upper end passes through the central opening 44 of the spring 42, which allows the individual spring arms 50 to be elastically deformed outwardly Because it is possible. The valve needle 24 is supported by its tapered portion 24a at the central opening 44 of the spring 40 and is rotatable within the central opening 44 by a low frictional force. A snap ring 52 is provided to retain the rotational bearing insert 34 within the element 12 to retain the bearing insert 34, valve needle 24 and spring 40 within element 12.

For example, for the supply of a liquid medium such as an adhesive, an obliquely extending bore 54 is provided on the upper side of the element 12, which is connected to a horizontal bore 56 which is closed by a termination plug. And the horizontal bore 56 is connected to the media channel 58 which surrounds the valve needle 24 and is coaxial with the rotational axis A and extends to the valve seat 22. And the media channel 58 is connected by two passageway channels 23 and 25 in the first insert 18 and the second insert 20 so that the media is ejected at an outlet Through the channel 28. An o-ring 60 is provided between the element 12 and the swivel bearing insert 34 for sealing the liquid media and a work ring 62, which permits sealing vertical movement and rotational movement of the valve needle 24 Is provided between the rotary bearing insert (34) and the valve needle (24). Sealing to the ball bearings 32 is provided by an additional O-ring 64.

Because the applicator described above is designed as a replacement module for a dosing device, the feed channel 54 has an additional sealing ring 66 at its inlet end, whereby the applicator can dispense an existing dosing system system in a simple manner. Dosing can occur, for example, by applying a downward vertical force to the top of the valve needle 24 by a known piezo driving means. As a result, the valve ball 26 is pressed onto the valve seat 22, so that the medium can not flow out. If no force is applied to the valve needle 24, the valve needle 24 may be pushed vertically upward by the force of the spring 40 and out through the outlet channel 28 where the media extends obliquely.

Since the rotary disk 16 is rotatable with respect to the base body 10 in both rotational directions without angular restrictions, the outlet channel 28 can be directed by any actuator to any desired angular position. A toothing 17 to which the driving gear 72 of the driving unit 70 connected to the base body 10 is engaged may be provided on the outer circumferential surface for driving the rotary disk 16. [ Further, the rotating disk 16 may have a rotary encoder in the form of a plurality of magnets 19 (only one magnet 19 is shown in FIG. 2) Any angular position can be controlled by a controller (not shown).

The applicator described above may be installed as a replacement module in a dosing device having a dosing driver operating at the upper end of the valve needle 24. [ When the dosing driver pushes the valve needle 24 downward, the outlet channel 28 is closed and the media fed through the channels 54, 56, 58 can not be released. By actuating the actuator 70, the rotary disk 16 can be rotated in a desired direction, in which case the valve needle 24 rotates with the rotary disk 16 by friction. When the outlet channel 28 reaches the desired position and orientation, the dosing valve is opened such that the spring 40 moves the valve needle 24 back to the position shown in FIG. 1 so that the media can flow through the outlet channel 28 Can be discharged. In this position, the rotating disc and the valve needle 24 can rotate independently of each other.

With the described dispensing device, a known jet valve can be used to tilt a small distance between the outlet opening and the workpiece. At the same time, the outlet channel can be rotated as required, whereby the fourth axis can be implemented for the dosing device, or the disadvantage of the required fourth robot axis can be avoided. The drive 70 as well as the rotary encoder described can be connected to the control electronics of the dosing system to enable precise synchronization between dosing and rotational behavior.

Claims

A rotary disc 16 mounted on the base body 10 so as to be rotatable around a rotary axis A and having an outlet channel 28 inclined with respect to the rotary shaft A and a valve seat 22, And a valve needle (24) mounted to be supported by the valve seat (22)
Characterized in that the rotary disk (16) and the valve needle (24) are independently rotatable about each other about the axis of rotation (A).

The method of claim 1,
Wherein the valve needle (24) is rotatably mounted about the rotational axis (A).

3. The method according to claim 1 or 2,
And a rotation bearing (34) for the valve needle is provided on the base body (10).

4. The method of claim 3,
Wherein a rotating bearing (32) for the rotating disk (16) is provided on the base body (10).

5. The method of claim 4,
Wherein the two rotating bearings (32, 34) are coaxially aligned.

3. The method according to claim 1 or 2,
Wherein the rotary disk (16) is rotatable in an arbitrary direction with no angular restriction with respect to the base body (10).

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3. The method according to claim 1 or 2,
Characterized in that the rotating disk (16) has a round disk shape and has a toothing (17) on the outer circumferential surface thereof.

3. The method according to claim 1 or 2,
Characterized in that the valve needle (24) is subjected to a spring load and has a valve ball (26) at one end.

3. The method according to claim 1 or 2,
Wherein the valve seat (22) is provided on an insert (18) of the rotating disc (16).

3. The method according to claim 1 or 2,
Wherein the outlet channel (28) is provided in an insert (20) of the rotating disk (16).

3. The method according to claim 1 or 2,
Wherein the cross section of the outlet opening of the outlet channel (28) is perpendicular to the longitudinal axis of the outlet channel (28).

3. The method according to claim 1 or 2,
And a rotary encoder (19) for detecting the position of the rotary disk (16).

3. The method according to claim 1 or 2,
Wherein the application device is designed as a replacement module for the dosing device.

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