JPH02211693A - Printer with dust collector - Google Patents

Abstract

PURPOSE:To prevent defective printing spread in a printing process by separating and arranging a positioning mechanism and a printing means in a carrying system carrying a printed wiring board while dusting the surface of the printed wiring board prior to printing. CONSTITUTION:A positioning mechanism 3 and a printing means 4 are separated and disposed while being arranged at the same location on a carrying system 2, and a dusting means 5 is disposed between the positioning mechanism 3 and the printing means 4. When a printed wiring board 1 is located and pushers 3b are retreated to specified positions while the positioning mechanism 3 is lowered, the printed wiring board 1 is carried to the location of the printing means 4 as it is, but the surface of the board 1 is cleaned by the dusting means 5 during the carrying process. Accordingly, the surface of the printed wiring board is cleaned, thus avoiding the defective spread, etc., of printing, then printing and forming a solder resist layer having no printing unevenness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a printing apparatus with a dust removal device suitable for manufacturing printed wiring boards.

(Prior Art) In the manufacturing process of printed wiring boards, it is necessary to print and form a required circuit pattern on the board surface, or to selectively cover the formed circuit pattern surface by printing a solder resist. It is familiar. By the way, this type of printed wiring board printing is normally performed using the following printing apparatus.

That is, as schematically shown in side view in FIG. 2, there is a transport system 2 for mounting and transporting the printed wiring board 1, a positioning mechanism 3 for positioning the printed wiring board 1 on the transport system 2, and a positioning mechanism 3 for positioning the printed wiring board 1 on the transport system 2. a printing means 4 for performing required printing on a predetermined surface of the printed wiring board 1; and the transport system 2.
9. A printing device is used which includes a drive control means (not shown) for driving and controlling a positioning mechanism 3, a printing means 4, and the like.

Thus, printing on the printed wiring board 1 by the printing apparatus is performed as follows. For example, as shown in plan in FIG. 3, first, a printed wiring board is transported through the transport system 2, and the reference pins 3a are aligned with the side in the direction of movement and one side with respect to the direction of movement. The other side is pressed by a pusher 3b that can move forward and backward to determine the position. After positioning, the printing means 4 is driven to perform the desired printing. In other words, positioning of the printed wiring board 1 and printing on the printed wiring board 1 are performed at the same location on the transport system 2.

(Problems to be Solved by the Invention) Although the printing apparatus having the above configuration can be mass-produced, it has the following problems. In other words, there is no particular problem when the circuit pattern pitch is relatively large, but as the circuit pattern pitch becomes smaller, for example, when printing and depositing solder resist, it is often found that the desired purpose cannot be fully achieved. It will be done. In other words, there are cases where the required area of the printed wiring board is not completely covered by printing, and there is a problem in that solder adheres to undesired areas, impairing the functionality of the printed wiring board.

The inventors of the present invention proceeded with studies in response to the above circumstances, and as a result,
It has been confirmed that in the printing apparatus, the presence of dust generated and attached during positioning of the printed wiring board prior to the required printing has a large influence.

[Structure of the Invention] (Means for Solving the Problems) The present invention is based on the above study results, and includes arranging a positioning mechanism and a printing means apart from each other in a conveyance system that conveys a printed wiring board, and The present invention is characterized in that a dust removal means is provided to remove dust from the surface (printed surface) of the printed wiring board prior to printing.

(Function) According to the above configuration, even if dust generated during positioning etc. adheres to the printed surface of the substrate during printing with the printing device, that surface is removed prior to printing.

Since it is cleaned, printing paste defects during the printing process are totally eliminated, and the desired printing can be easily and uniformly achieved.

(Example) The present invention will be described in detail below with reference to FIG. FIG. 1 is a side view showing the main parts of a printing device with a dust removal device for printed wiring boards according to the present invention, and 2 is a side view showing a printed wiring board 1.
A transport system 3 is a positioning mechanism for positioning the printed wiring board 1, which is transported through the transport system 2, on the transport system 2. The positioning mechanism 3 includes, for example, a reference pin 3a disposed so as to be in contact with a side in the traveling direction of the printed wiring board 1 conveyed on the conveying system 2 and one side with respect to the traveling direction. The main body is movable up and down, and a pusher 3b is movable back and forth for pressing and positioning the printed wiring board 1 on the reference pin 3a from the side facing the reference pin 3a. Further, numeral 4 is a printing means, for example, a Sufurin type printing device, which is disposed on the transport system 2 and separated from the positioning mechanism 3; The dust removing means disposed between the two is, for example, a brush type dust removing device. This dust removing means 5 includes, for example, a rotating brush 5a that can sufficiently slide into contact with the entire printed wiring board 1 conveyed through the conveying system 2, a static eliminator 5b disposed along the axial direction of the rotating brush 5a, and a blower. It is composed of system 5C. As described above, compared to conventional printing apparatuses, the printing apparatus according to the present invention has the following advantages: the positioning mechanism 3 and the printing means 4 are not arranged at the same location on the conveyance system 2, but are arranged at a distance from each other, and the dust removal means 5 is arranged between the positioning mechanism 3 and the printing means 4.

Next, the operation of the printing apparatus having the above configuration will be explained. First, the printed wiring board 1 that has been transported through the transport system 2 is positioned as required by the positioning mechanism 3. In other words,
The printed wiring board 1 is restrained from moving in the advancing direction by the reference pin 3a of the positioning mechanism 3 that rises above the surface of the transport system 2, and is pushed from the other direction by the pusher 3b to a fixed direction 2. Aligned to position. After being positioned in this way, the pusher 3b retreats to a predetermined position and the positioning mechanism 3 descends, and the printed wiring board 1 is transported as it is (in the positioned state) to the position of the printing means 4, but during this transport process, dust is removed. By means of means 5 the surface is cleaned. That is, dust generated and attached due to mechanical contact with the reference pin 3a etc. during the positioning is removed.

The surface is then conveyed to the next printing means 4 in a cleaned state, and required printing processing is performed.

In the above configuration example, the dust removal means 5 includes a rotary brush 5a that can sufficiently slide on the entire printed wiring board 1 conveyed through the conveyance system 2, and a static eliminator disposed along the axial direction of the rotary brush 5a. Although an example has been shown in which the piece 5b and the blow system 5C are used, for example, a viscous rotating roller may be used, or a vacuum suction system may be used instead of using a rotating roller as described above.

[Effects of the Invention] As described above, according to the dust removal device and the τj printing device according to the present invention, when printing a solder resist on the surface of a printed wiring board and selectively depositing a solder resist layer, the conveyance After the printed wiring board has been placed and positioned, dust on the surface is easily and reliably removed by a dust removing means, and the surface to be printed is then conveyed to the printing means in a clean state. Printing is performed. That is, according to the printing apparatus with a dust removal device according to the present invention, the required printing is performed on a clean surface from which dust and other particles have been removed, so problems such as poor printing adhesiveness are completely avoided.
A solder resist layer or the like can always be reliably printed on a predetermined area without printing unevenness. Moreover,
The above-mentioned printing device with a dust removal device not only does not require complicated operation or management, but also does not pose any particular problems in terms of maintenance compared to conventional printing devices, so it contributes to improved yield and works well with scales. It can be said that it is suitable for mass production.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the configuration of main parts of a printing device with a dust removal device according to the present invention, FIG. 2 is a side view showing the structure of main parts of a conventional printing device, and FIG. FIG. 3 is a plan view showing the configuration of main parts. 1... Printed wiring board 2... Transport system 3... Positioning mechanism 3a... Positioning reference pin 3b... Positioning pusher 4... Printing means 5... Dust removing means 5a... Dust removing means Rotating blow 5b... Static eliminator piece 5C of dust removal means... Blow system of dust removal means Applicant: Toshiba Corporation

Claims (1)

[Claims] a transport system for transporting a printed wiring board; a positioning mechanism for positioning the printed wiring board on the transport system; a dust removal means for removing dust adhering to the printed wiring board positioned by the positioning mechanism; A printing means for printing on a predetermined surface of a printed wiring board whose transport has been temporarily stopped after dust removal by the means; and a drive control means for driving and controlling the transport system, positioning mechanism, dust removal means, and printing means. A printing device with a dust removal device featuring: