JPH0513745U - Screen mask cleaning device - Google Patents

Abstract

(57) [Summary] [Purpose] Complete cleaning and maintain a good working environment. [Structure] Reference numeral 4 denotes a nozzle, from which a mixed gas 5 of air and a solvent under pressure is injected. Reference numeral 6 denotes a mortar-shaped shield cover, which includes the tip of the nozzle 4 and seals the screen mask 1. A mortar-shaped cleaning container 7 having a diameter larger than the diameter of the shield cover 6 is arranged on the opposite side of the shield cover 6 with the screen mask 1 interposed therebetween so as to seal the screen mask 1. At the center of the bottom surface of the cleaning container 7, there is provided a pipe 7a penetrating the bottom surface. An inhaler (not shown) is connected to the pipe 7a.
The mixed gas 5 and the solder particles 2 in the cleaning container 7 are sucked in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a process of surface-mounting electronic components on a printed circuit board, and more particularly to a screen mask cleaning device used in a cream solder printing process.

[0002]

[Prior Art]

 A conventional screen mask cleaning method will be described with reference to the drawings. FIG. 2 is a side view showing a conventional method of cleaning a screen mask. In the figure, reference numeral 1 is a screen mask. The screen mask 1 has various sizes corresponding to solder fusion positions for mounting electronic components on a printed circuit board (not shown) on which electronic components are surface-mounted. Is provided with the opening 3. Cream solder is applied to a predetermined position of the printed circuit board through the opening 3 and is fused.

Therefore, after fusion bonding, the particles of the cream solder 2 adhere to the openings 3. As a typical method that has been conventionally performed as a method for removing the particles of the adhered cream solder 2, the alcohol solvent 9 is applied to the screen mask 1 and brushed with a brush 8 to remove the cream solder 2. The particles were stripped off.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional cleaning method, if the hole diameter of the opening is smaller than the diameter of the brush bundle 8a of the brush, the brush does not go into the opening, and cleaning cannot be performed. There was a flaw. Further, there is a problem that cream solder softened by the applied solvent, the solvent, and the like are easily scattered by the brushing, which adversely affects the working environment. The present invention has been made in view of the above-mentioned conventional drawbacks and problems, and an object thereof is to perform a cleaning completely and to keep a screen mask cleaning apparatus in a good working environment. To provide.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, the present invention is a screen mask cleaning device for removing solder particles deposited on an opening of a screen mask, in which a solvent mixed with pressurized air is sprayed on the screen mask. A nozzle, a shield cover that includes the tip of the nozzle and seals the screen mask, and a mortar that is provided at a position facing the nozzle across the screen mask and that sucks the solvent and solder particles. And a cleaning container in the shape of a circle.

[0006]

[Action]

 In the present invention, the solvent is sprayed in the form of a screen mask with pressurized air, so even if the diameter of the opening is small, the entering solder particles are washed and removed with pressurized air. Moreover, the spraying is performed inside the shield cover, and the cleaned solvent and solder particles are sucked from the suction port of the cleaning container and are not scattered around.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing a cleaning state by the screen cleaning apparatus according to the present invention. In the figure, reference numeral 4 denotes a nozzle through which a mixed gas 5 of air and a solvent under pressure is injected. Reference numeral 6 denotes a mortar-shaped shield cover, which includes the tip of the nozzle 4 and seals the screen mask 1. A mortar-shaped cleaning container 7 having a diameter larger than that of the shield cover 6 is arranged on the opposite side of the shield cover 6 with the screen mask 1 interposed therebetween so as to seal the screen mask 1. At the center of the bottom surface of the cleaning container 7, there is provided a pipe 7a penetrating the bottom surface. An inhaler (not shown) is connected to the pipe 7a. The gas mixture in the cleaning container 7 is connected to the pipe 7a. 5 and solder particles 2 are inhaled.

The cleaning operation will be described below. A mixed gas 5 of air and a solvent pressurized from a nozzle 4 is jetted to the solder particles 2 attached to the openings 3 of the screen mask 1 after the step of cream solder printing is completed. The mixed gas 5 becomes a jet jet and is sprayed into the opening 3 of the screen mask 1. Therefore, the solder particles 2 deposited in the opening 3 are melted by the mixed gas 5 and the screen gas 1 from the screen mask 1. To fall. The dropped solder particles 2 and the mixed gas 5 are sucked through the pipe 7a. The mixed gas 5 injected from the nozzle 4 is scattered on the screen mask 1 but is not scattered to the outside because it is sealed by the shield cover 6. In this embodiment, one nozzle is used, but the present invention is not limited to this, and it is needless to say that a plurality of nozzles may be used depending on the deposition state of solder particles.

[0009]

[Effect of the device]

 As described above, according to the present invention, the pressurized air and the solvent are jetted to the solder particles deposited on the screen mask, so that the solvent easily enters the opening of the screen mask. The solder particles are melted by the solvent without remaining in the openings. Further, since the melted solder particles and the mixed gas fall into the cleaning container and are sucked in through the intake pipe, there is an effect that the working environment can be kept good without scattering to the outside.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a cleaning state of a screen mask cleaning container according to the present invention.

FIG. 2 is a side view showing a conventional screen mask cleaning method.

[Explanation of symbols]

 1 Screen Mask 2 Solder Particles 3 Opening 4 Nozzle 5 Mixed Gas 6 Shield Cover 7 Cleaning Container

Claims (1)

[Scope of utility model registration request] 1. A screen mask cleaning apparatus for removing solder particles adhered to an opening of a screen mask, comprising:
A nozzle for injecting a solvent mixed with pressurized air to a screen mask, a shield cover for sealing the screen mask including a tip of the nozzle, and a nozzle arranged to face the nozzle with the screen mask interposed therebetween. A screen mask cleaning device comprising a mortar-shaped cleaning container having an intake port for sucking a solvent and solder particles.