JPH0212720A - Resin seal forming apparatus for sealed component with lead - Google Patents

Abstract

PURPOSE:To spread and fix resin uniformly all round a sealed part, by providing a rotation causing apparatus which gives the sealed component rotating power round its center line and providing a washing bath filled with washing liquid in which a supporter shifted downward is immersed. CONSTITUTION:When one of supporters 11, which are mounted on a turn-table 10 and rotate, reaches a starting position of supporting A, epoxy resin is injected from the nozzle 24 of a resin injection device 23, and spread and fixed on the projecting part of the lead (c) of a fuse (a). During said supporter 11 is shifted to a finishing position of supporting B, the temperature fuse (a) rotates round its center line, and spread and fixed resin diffuses all round a sealed part as well as surplus resin flows down along a guide. When said supporter 11 goes over the position B, said supporter 11 goes apart from the fuse (a) which is carried by a conveyer 1, and resin is solidified to form a seal (s). Resin attaching to said supporter 11 is washed off at the position B by immersing said supporter 11 in washing liquid (w) in a washing bath 36 and washing it by ultrasonic wave.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to the manufacturing of leaded encapsulated parts such as pellet-type temperature fuses in which leads protrude from both ends of the encapsulated case. The present invention relates to a device that forms a seal by applying resin to the protruding portion of the device.

Problems to be Solved by the Prior Art and the Invention Pellet-type temperature fuses have a structure in which rod-shaped leads protrude from both ends of a cylindrical case that encloses contacts, etc. In the final stage of manufacturing, the case is A seal is created by applying epoxy resin to the protruding part of the lead at the end, and various devices that automatically form such a resin seal have been proposed, but There are noticeable defects such as the amount of resin applied is too small, the resin does not go around the entire circumference of the sealing part, resulting in an incomplete seal, or conversely, too much resin is applied and the case gets dirty. There has been a desire for an apparatus that can reliably and neatly apply resin seals.

Means for Solving Interlayer Points The resin seal forming apparatus for leaded encapsulated parts of the present invention was completed based on such demands, and includes rod-shaped leads at both ends of a cylindrical encapsulation case. By holding one lead of the protruding encapsulated part with a holder so that it can rotate freely around the center line, the protruding encapsulated part is transported along the transport path at a constant interval in a horizontal position perpendicular to the transport direction. At the same time, a turntable is provided below the conveyance path, and the turntable is driven so that its upper side rotates in synchronization with the same direction as the conveyance direction, centered on a horizontal axis perpendicular to the conveyance direction of the conveyance path. A plurality of supports each having a support part at the tip that supports the enclosed part freely in rotation around the center line are attached radially to the table, and each supporter supports the enclosed part on the transport path before reaching the uppermost position. Apply sealing resin to the starting position of the enclosed part, pointing toward the part where the other lead of the enclosed case protrudes, which will become the sealing part of the enclosed part. A spouting nozzle is installed, and a guide is provided at a position corresponding to the lower part of the sealed part of the encapsulated part of the support to wash off the excess resin out of the blown resin, and the encapsulated part moves from the support start position to the support end position. A rotation imparting device was provided to apply rotational force around the center line to the enclosed component while it was being transported, and a cleaning tank filled with a cleaning solution in which the downwardly moved support was immersed was provided.

Functions and Effects of the Invention The present invention has the above configuration, and when the enclosed component is held by the holder and transported along the conveyance path in a horizontal position and reaches the support start position, the enclosed component is attached to the turntable. At the same time, sealing resin is jetted from a nozzle toward the part of the enclosed part from which the lead protrudes at one end of the enclosed case, which is the sealing part of the enclosed part. While the encapsulated component coated with this resin moves to the support end position, a rotational force is applied to the encapsulated component by the rotation applying device, and the encapsulated component is supported by the support part of the support and rotates along the center line. As a result, the applied resin flows around the entire circumference of the sealed part of the enclosed part, and the excess resin flows down along the guide, and when it passes the support end position, the support is separated from the enclosed part. , the encapsulated part is again held only by the holder and transported along the conveyance path, and a seal is formed by solidifying the applied resin. By immersing the support in the cleaning solution and passing through it, the resin adhering to the support is cleaned.

In this way, in the present invention, the sealing part of the enclosed part is
After applying resin to the protruding part of the lead of the encapsulation case, the encapsulation part was rotated around the center line.
The resin is evenly applied around the entire circumference of the sealing part, ensuring a reliable seal.Also, the excess resin is allowed to flow along the guide, so the resin does not adhere to any excess areas. It is extremely efficient as it eliminates the need for post-processes such as scraping off excess resin, and completes the formation of the resin seal at the stage of applying the resin. Furthermore, since the resin attached to the support is washed with a cleaning solution before being used for the next time, the next time the enclosed part is supported, it will be supported securely and the above operation will be ensured. effective.

EXAMPLE Hereinafter, an example in which the present invention is applied to forming a resin seal on a bullet-type temperature fuse will be described with reference to the accompanying drawings.

1 and 2, reference numeral 1 denotes a conveyor for conveying pellet-type thermal fuses in the arrow direction of FIG. It has a structure in which round bar-shaped leads cSd protrude from both ends of the cylindrical case b that encloses the case b, and a resin seal S is formed on the front surface of the case where the leads C protrude. The temperature fuse 1 is connected to the conveying direction by inserting the lead d on the side opposite to the side to be sealed between the pair of resin holding plates 3 of the holder 2 attached to the conveyor 1 at regular intervals. The conveyor is conveyed while being held in a cantilevered manner so that it can rotate freely around the center line in a right-angled horizontal position.
The index 7 is installed, the center of the turntable IO is attached to the tip of the output shaft 8 in the horizontal direction perpendicular to the conveyance direction of the conveyor 1, and the turntable IO is rotated at a rotation speed synchronized with the conveyance speed of the conveyor 1. The turntable 10 is rotatably driven in the clockwise direction in FIG. 1, and on the outer periphery of the turntable 10, there are a plurality of supports 11 on which the thermal fuse units are placed and supported, corresponding to the mounting intervals of the above-mentioned holders 2. They are installed radially at regular intervals.

As shown in detail in FIG. 4.5, this support 11 has a temperature fuse λ case b at the upper end of a thick support plate 12.
A pair of left and right rollers i3 each divided into three parts are rotatably supported by a shaft 14, and this support plate 12
A support groove 16 having a ■-shaped cross section is formed in a projecting plate 15 projecting from the upper surface of the rear end to support the enlarged diameter portion at the base of the rear glue d. It also serves as a positioning plate that determines the position in the center line direction by abutting the lower part of the support plate 12, and the base of the rear glue d and the front lead are placed immediately behind the support plate 12 and at the front a little apart. A support groove I8 with a V-shaped cross section that supports the vicinity of the tip of C.
．． A rear support plate 17 and a support plate 119 having numerals 20 and 119 formed at the upper end are arranged respectively, and these are integrally attached to the turntable 10 with bolts 21 and 22, and each support 11 is shown in FIG. As shown in , at the support end position 8, which is a little before reaching the uppermost position, the roller 13 and the bearing grooves I6, I8, and 20 are located on the conveyance surface of the temperature fuse a of the conveyor 1, and at the uppermost position. At the support end position B, which is a little ahead, it is separated below the conveyance surface of the temperature fuse a, and corresponds to the support start position A of the mounting frame 40, which is vertically adjustable above the conveyor 1. At this position, a resin jetting machine 23 for spouting epoxy resin for sealing is installed with its nozzle 24 in an oblique position pointing toward the protruding part of the glued C on the front surface of the case b of the temperature fuse a, which is the sealing part. At the same time, a guide 25 is provided on the front surface of the support plate 12 of each support tool 11, corresponding to the lower part of the above-mentioned sealing part, and the upper surface of the guide 25 is cut obliquely to allow excess resin to flow.
is attached with bolts 26.

The mounting frame 40 has a drive pulley 30 attached to the output shaft 29 of the drive motor 28, and pulleys 31 and 320 supported by shafts 33 at positions corresponding to the support end position B and the support start position A, respectively. The endless belt 34 is looped and runs counterclockwise in FIG.
Pulley 3 of the endless belt 34! , 32 are adapted to be applied to the outer circumferential surface of case b of temperature fuse a, as shown in FIG. An ultrasonic cleaning tank 36 containing a cleaning liquid W is provided below the cleaning liquid W, and each support If is immersed in the cleaning liquid W when it comes to the lower position.

Next, the operation of this embodiment will be explained.

When the temperature fuse a of the seal moe is held by the holder 2 of the conveyor 1 and transported in a horizontal position to the support start position wlA, the support 11 attached to the turntable IO and rotating moves to the support start position. At point A, while the temperature fuse λ is held by the holder 2, the case b is received by the roller I3, the leads d and c are received by the bearing grooves 16, 18, and 20, and a suppressor (not shown) is held. By moving forward and momentarily pushing the tip of the front lead C and pressing the rear surface of the case b against the projecting plate 15, positioning in the center line direction is achieved. As shown in FIG.
The front glue C is applied to the protruding part, and the temperature fuse unit coated with this epoxy resin is placed at the support end position B.
During the movement, the horizontal running part of the endless belt 34 presses the case b while running in the right direction in FIG.
The applied epoxy resin rotates around the center line in the clockwise direction in the figure while being supported at 0. As a result, the applied epoxy resin rotates around the entire circumference of the sealing part, and the excess resin flows down along the guide 25 to reach the support end position. After passing B, the support 11 moves away from the temperature fuse &, and the temperature fuse a returns to the holder 2.
The In
A resin seal S as shown by the line is formed, and this is repeated sequentially to sequentially seal the temperature fuse a with epoxy resin, and the support 11 is separated from the temperature fuse λ at the support end position B. When the supporting tool If is moved downward, it is immersed in the cleaning liquid W in the cleaning tank 36 and subjected to ultrasonic cleaning, so that the resin adhering to the supporting tool If is washed off, and the supporting tool If is used for the next use.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an embodiment of the present invention, Fig. 2 is a partially cutaway side view thereof, Fig. 3 is an enlarged perspective view of the temperature fuse held by a holder, and Fig. 4 5 is an enlarged partially cutaway side view of the mounting portion of the support, and FIG. 5 is an enlarged partially cutaway front view thereof. l: Conveyor 2: Holder 8: Output shaft lO: Turntable ll: Support I3: Roller 16.18.
20: Support groove 24: Nozzle 25 guide 34: Endless belt 36: Cleaning tank A: Support start position B: Support end position λ: Temperature fuse b = Case c, d: Lead W: Cleaning liquid

Claims (1)

[Claims] An enclosed component with rod-shaped leads protruding from both ends of a cylindrical enclosed case is held by a holder so that one of the leads can freely rotate around the center line, thereby making a direction perpendicular to the conveying direction along a conveying path. The structure is such that the conveyance is carried out in a horizontal position at a constant interval, and below the conveyance path, the upper side is synchronously moved in the same direction as the conveyance direction, centered on a horizontal axis perpendicular to the conveyance direction of the conveyance path. A turntable that is driven to rotate is provided, and a plurality of supports each having a support portion at a tip that supports the enclosed component so as to freely rotate about a center line are attached to the turntable in a radial manner, and each of the supports is provided with a turntable that is driven to rotate. The support of the enclosed component on the conveyance path is started before the tool reaches the uppermost position, and the support is ended beyond the uppermost position, and the support start position of the enclosed component becomes a sealing part of the enclosed component. , a nozzle for spouting a sealing resin directed toward a portion of the other of the enclosure cases from which the leads protrude, and a nozzle for spouting a sealing resin is installed at a position corresponding to a lower part of the sealing portion of the enclosure component of the support. A guide is provided for washing off excess resin, and a rotation imparting device is provided for applying a rotational force around a center line to the enclosed component while the enclosed component is being conveyed from the support start position to the support end position. , an apparatus for forming a resin seal for an encapsulated part with a lead, further comprising a cleaning tank filled with a cleaning liquid in which the supporting tool that has been moved downward is immersed.