JPH0141114Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) This invention relates to a lead frame continuous drying device.

(Prior technology) When an electronic element is molded on a lead frame with synthetic resin and placed in a package, burrs of the synthetic resin etc. are formed on the sides of the package, so these are removed by blasting, then washed with water and dried to complete the product. Make it.

(Problem to be solved by the invention) However, in the above drying process, compressed air for drying is blown from a large number of nozzles arranged at least from above and below the lead frame to be transferred. is agitated by the compressed air, vibrates, and comes off the lead frame guide.
Lead frames often became entangled with each other, causing problems that caused confusion in continuous drying. In view of the above facts, the purpose of this invention is to provide a lead frame continuous drying device that can perform continuous drying smoothly.

[Structure of the idea]

(Means for Solving the Problems) The continuous lead frame drying device according to this invention has a pair of left and right lead frame guides each having grooves 2, 2' into which both sides 1, 1' of the lead frame A can fit. A lead frame transfer mechanism that rotates in opposite directions, which clamps the lead frame A fitted in the grooves 2 and 2' from above and below the rods B and B' so that the lead frame A can be transferred. Nozzles 4, 4' capable of injecting compressed air toward the lead frame A are provided above and below the lead frame, and lead frame guide rods B,
A compressed air pipe 5 installed outside B′ for sending compressed air,
Branch pipes 6 communicating with the grooves 2 and 2' from the lead frame guide rods B and B' are provided at several locations on the lead frame guide rods B and B'.

(Example) Based on an example shown in FIG. 1, the structure of the lead frame continuous drying apparatus according to the present invention will be described in detail. The lead frame 1 fitted in the grooves 2, 2' is held between the upper and lower sides of a pair of left and right lead frame guide rods B, B' having grooves 2, 2' from above and below,
Move the lead frame A in the direction of arrow x (see Figure 2).
Drive devices C and C' for transporting lead frames rotating in opposite directions are provided with endless cables 3 and 3' having a circular cross section in FIG. 1 above and below the lead frame A. The lead frame A
Nozzles 4, 4' are provided to inject compressed air toward. As shown in FIG. 3, compressed air for drying is supplied through compressed air pipes 5, 5' arranged outside the guide rods B, B', and through the branch pipe 6 into the grooves 2, 2'. It is made to be able to be released in various places. Furthermore, in Fig. 2, 7 is a blower, 8 is a drive motor for the endless cable 3, 9, 9' is a pulley for the upper endless cable 3, and 10, 10' is an adjustment for the lower endless cable 3'. 11 is a rotating belt of the upper pulley 9, 12 is a closed belt that is stretched around the shaft of the upper pulley 9 and the shaft of the lower pulley 10, and A' also shows the package portion.

FIG. 4 shows another example of the endless cables 3, 3' having an uneven surface 13 on the surface.

FIGS. 5 and 6 are longitudinal sectional side views and front views showing other embodiments of the lead frame moving drive devices C, C'. For example, elastic tires 15, 15' such as sponge are fitted around the outer periphery of the elastic tires 15, 15'.
The lead frame A is held and transferred from above and below at the part 15', and each trochanter 14, 1
4' are adapted to be rotated by endless chains 16, 16', respectively. In FIG. 6, 8' is a motor for rotating the upper trochanter 14, and 12' is a closed chain that rotates the lower trochanter 14' than the upper trochanter 14.

(Function) Since this device has the above-mentioned configuration, both sides 1 and 1' of the lead frame A are fitted into the respective grooves 2 and 2' of the pair of left and right guide rods B and B' to guide them. and upper and lower lead frame transfer drive device C,
C' is transferred while being held by endless belts 3, 3' or elastic tires 15, 15', while drying compressed air is injected from above and below the lead frame A to dry the lead frame. .

In order to effectively dry every corner of the lead frame A, it is necessary to pass the compressed air pipes 5, 5' provided outside the guide rods B, B' into the branch pipes 6 to the respective grooves 2, 5'.
Release compressed air into 2'.

[Effect of idea]

Since this device has the structure and function described above, the lead frame is deburred, and even if compressed air is blown for drying in the drying process after washing with water, both sides of the lead frame are not exposed to the guide rods. The lead frame is held in the groove of the lead frame, and is transferred by being held between the top and bottom by a lead frame transfer drive device, so that the lead frame jumps and comes off the lead frame guide when compressed air is blown, and the lead frames become entangled with each other and are transferred continuously. Since there is absolutely no disruption to the drying process and the compressed air can be blown quite powerfully, the drying effect can be further improved. Further, since compressed air is released from each groove 2, 2' through the branch pipe 6, every corner of the lead frame A can be effectively dried.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of an embodiment of the lead frame continuous drying device according to this invention, Fig. 2 is a front view thereof, and Fig. 3 shows a configuration in which compressed air can be released into the groove of the guide rod. FIG. 4 is a front view of a portion of an example of the endless cable, FIG. 5 is a longitudinal side view of another embodiment, and FIG. 6 is a front view thereof. A is the lead frame, B,
B' is a lead frame guide rod, C and C' are lead frame transport drive devices, 1 and 1' are both sides of the lead frame, 2 and 2' are grooves of guide rods B and B', 4,
4' indicates a compressed air injection nozzle.

Claims (1)

[Scope of utility model registration request] A pair of left and right lead frame guide rods B, B' are provided with grooves 2, 2' into which both sides 1, 1' of the lead frame A can be fitted. Lead frame transport drive devices C and C', which rotate in opposite directions to each other and which hold frame A from above and below and can transport lead frame A, are provided above and below lead frame A. Nozzles 4, 4' capable of injecting compressed air toward the lead frame guide rods B, B' are provided with nozzles 4, 4' that communicate with the grooves 2, 2' from compressed air pipes 5, 5' that send compressed air provided on the outside of the lead frame guide rods B, B'. This continuous lead frame drying apparatus is characterized in that branch pipes 6 are provided at several locations on the lead frame guide rods B and B'.