JP2861332B2 - Screen printing equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a screen printing apparatus for applying cream solder to a substrate, and more specifically, means for automatically converting a screen mask with a change in the type of substrate. About.

(Prior Art) A screen printing apparatus for applying cream solder to a substrate in order to adhere electronic components to the substrate is composed of a screen mask or a squeegee having pattern holes formed therein.
The cream solder is applied through the pattern holes by sliding the squeegee while bringing the substrate close to the lower surface of the screen mask.

(Problems to be Solved by the Invention) In such a screen printing apparatus, when the type of the substrate is changed, the screen mask must be replaced accordingly. However, conventionally, since the replacement of the screen mask has been performed manually, there has been a problem that much labor and time are required.

Accordingly, an object of the present invention is to provide a means for easily and automatically changing a screen mask according to a change in the type of a substrate.

(Means for Solving the Problems) In the present invention, a screen printing apparatus is configured by a printing unit and a storage unit provided on a side of the printing unit. Then, the printing portion is provided with a main body frame, a screen mask portion slidably provided on the main body frame, a squeegee sliding on a screen mask mounted on the screen mask portion, and a sliding of the squeegee. A driving unit, and a slider that is driven by the sliding driving unit and slides integrally with the squeegee to move the screen mask into and out of the main body frame. It comprises a stocker for the above-mentioned screen mask part, and an access means for putting the screen mask part in and out of this stocker.

(Operation) In the above configuration, when replacing the screen mask portion, the screen mask portion is slid by a slider, sent out of the main body frame, and collected in the stocker by the insertion / removal means.

Further, by driving the loading / unloading means, a desired screen mask portion stored in the stocker is sent out to the main body frame, and the screen mask portion is slid by a slider to be positioned at the printing position.

Example Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall side view of the screen printing apparatus. This screen printing apparatus comprises a printing section A and a storage section B for a screen mask section. First, the configuration of the printing unit A will be described.

Reference numeral 1 denotes a frame-shaped main body frame, in which a screen mask portion 2 is provided. The screen mask section 2 is formed by mounting a screen mask 4 on a frame-shaped mask holder 3. As shown in FIG. 3, the mask holder 3 is slidably mounted on the lower edge 1a of the main body frame 1 so as to be freely inserted into and taken out of the main body frame 1.

In FIG. 3, reference numeral 5 denotes a plate-shaped bracket which is slidably mounted on a rail 7 provided on a side wall of the main body frame 1 via a slider 6. A nut 8 is integrally provided on the side of the bracket 5. A feed screw 9 provided in parallel with the rail 7 is screwed into the nut 8. In FIG. 1, reference numeral 10 denotes a motor for driving the feed screw 9. Therefore, when the motor 10 is driven, the bracket 5 slides along the rail 7.

In FIG. 1, reference numeral 12 denotes a squeegee,
Is connected to a rod 14 of a cylinder 13 mounted on the cylinder 13.
Therefore, when the rod 14 protrudes and retracts, the squeegee 12 moves up and down with respect to the screen mask 4. Squeegee 12 is left and right 2
Are provided. Reference numeral 15 denotes a dispenser held by the bracket 5 for supplying cream solder onto the screen mask 4.

Reference numerals 16 and 17 denote cylinders as sliders provided at the front and rear portions of the bracket 5, and the rods 16 a and 17 a thereof hang down toward the screen mask portion 2. Rod 16a,
When 17a protrudes, its lower end can be engaged with the mask holder 3. When the motor 10 is driven, the cylinders 16 and 17 slide integrally with the squeegee 12.

Reference numeral 18 denotes an XY table, and 19 denotes a substrate provided on the XY table 18. Reference numeral 20 denotes a sensor provided below the main body frame 1, and detects a position of the screen mask 2. Next, the configuration of the storage section B will be described.

In FIG. 1, reference numeral 21 denotes a stocker, in which a plurality of access means 22, 23 comprising a belt conveyor are provided. The stocker 21 is supported by a rod 25 of a cylinder 24 as a lifting / lowering means. Further, between the stocker 21 and the main body frame 1, there is provided a transfer means 26 comprising a belt conveyor. The upper surface of the transfer means 26 is at the same level as the lower edge portion 1a, and the space between the main frame 1 and the transfer means 26 is formed by the screen mask 2
Can be transferred. By operating the cylinder 24, the access means 22, 23 are adjusted to the same level as the transfer means 26. Instead of the cylinder 24, it may be moved up and down by a feed screw or nut driven by a motor.

This screen printing apparatus has the above configuration, and the operation will be described next.

The screen mask unit 2 is positioned on the printing apparatus (see FIG. 1), and the motor 10 is driven to slide the squeegee 12 to apply cream solder to the substrate 19.

Screen Smack 2
To replace the squeegee, the rod 14 of the cylinder 13 is retracted, the squeegee 12 is
Is projected downward (see the chain line in FIG. 2 (a)). In this state, the motor 10 is rotated in the reverse direction to
Is slid rightward, the lower end of the rod 16a hits the outer wall of the mask holder 3, and the screen mask portion 2 is slid rightward.

Next, the rod 16a is raised, and the motor 10 is rotated forward to move the sliders 16, 17 to the left (see FIG. 2 (b)).

Next, the rod 17a is projected downward, and the slider 17 is slid rightward. Then, the rod 17a hits the outer wall of the mask holder 3 and sends the screen mask portion 2 from the main frame 1 onto the transfer means 26. Then, the transfer means 26 and the loading / unloading means 23 rotate clockwise, and the screen mask 2 is collected on the loading / unloading means 23 of the stocker 21. The drive timing of the rods 16a and 17a as described above,
The drive timing of the transfer means 26 and the access means 23 is controlled by detecting the position of the screen mask unit 2 by the sensor 20.

As described above, when the screen mask unit 2 is collected in the stocker 21, the cylinder 24 is driven to lower the stocker 21, and the screen mask unit 2a of the upper access unit 22 is made the same as the transfer unit 26. To level. Then, the new screen mask unit 2 is positioned at the printing position inside the main body frame 1 by driving the insertion / removal unit 22, the transfer unit 26, and the sliders 16 and 17 in the opposite directions.

As described above, according to this means, the screen mask portion can be easily and automatically replaced. The present invention is not limited to the above-described embodiment. For example, the transfer means 26 may be removed, and the screen mask portion 2 may be directly inserted and removed between the main body frame 1 and the stocker 21.

(Effects of the Invention) As described above, the present invention includes a printing section and a storage section provided on a side of the printing section. The printing section is slidable on the main body frame and the main body frame. A squeegee that slides on a screen mask mounted on the screen mask, a squeegee sliding drive unit, and a squeegee driven by the squeegee drive unit. A sliding element for sliding the screen mask into and out of the main body frame by sliding integrally, and the storage section is configured to allow the stocker of the screen mask part and the screen mask part to be taken in and out of the stocker. Since the screen printing device is composed of the loading and unloading means, it is possible to easily and automatically replace the screen mask part in response to a change in the type of substrate. Can.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of a screen printing apparatus, FIG. 2 is a side view during operation, and FIG. 3 is a partial front view. A: Printing section B: Storage section 1: Main body frame 2: Screen mask section 10: Sliding drive means 12: Squeegee 16, 17, Slider 21: Stocker 22, 23 ... means

Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) B41F 15/08 303 B41F 15/12 B41F 15/34-15/36 H05K 3/12 H05K 3/34 505

Claims (1)

(57) [Claims] 1. A printing section comprising: a printing section; and a storage section provided on a side of the printing section. The printing section includes a main body frame, and a screen mask section slidably disposed on the main body frame. A squeegee that slides on a screen mask mounted on the screen mask portion, a sliding drive unit for the squeegee, and a squeegee that is driven by the sliding drive unit to slide integrally with the squeegee. A slider for taking the screen mask into and out of the main body frame, and the storage unit comprises a stocker for the screen mask part and a means for taking the screen mask part in and out of the stocker. Screen printing device.