CN218602390U

CN218602390U - Preheating device for packaging power device

Info

Publication number: CN218602390U
Application number: CN202222750455.8U
Authority: CN
Inventors: 詹鑫源
Original assignee: Hubei Fangjing Electronic Technology Co ltd
Current assignee: Hubei Fangjing Electronic Technology Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-03-10
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses a preheating device of power device encapsulation, its technical scheme main points are: including the workstation, the fixed cover in inside of workstation has cup jointed the electric heating board, the top surface of electric heating board is provided with two chip lead frames, one side fixed mounting of workstation has the PLC controller, the PLC controller with electric heating board electric connection preheats the subassembly, it sets up to preheat the subassembly the top surface of workstation, be used for right the chip lead frame preheats, it includes to preheat the subassembly: rotate the storehouse, it sets up to rotate the storehouse the top surface of workstation, one side fixed mounting who rotates the storehouse has two hinges, uses through taking mutually supporting of post, standing groove, chip lead frame, electric heating board, rotation storehouse, first spacing hole, first support column and heat-conducting plate, can carry out gathering together of certain degree to the heat that the electric heating board produced and hold back for during the heat is difficult to give off the air, reduced the heat loss, and then saved electric power.

Description

Preheating device for packaging power device

Technical Field

The utility model relates to a power device encapsulates technical field, concretely relates to preheating device of power device encapsulation.

Background

A chip of a power device needs to be packaged after being welded, a layer of epoxy resin powder is attached to the surfaces of the chip, an electrode and a part of metal leads, the epoxy resin powder is melted through heating and heat preservation, the chip is taken out and cooled to enable a resin material encapsulating layer to be solidified, so that resin material encapsulation is completed, in order to enable the chip to have a stable structure during packaging, a lead frame needs to be preheated, the lead frame is used as a chip carrier of an integrated circuit, the lead frame is electrically connected with an external lead through a bonding material (gold wire, aluminum wire and copper wire), a key structural part of an electric circuit is formed, the lead frame serves as a bridge Liang Zuoyong connected with the external lead, most of semiconductor integrated blocks need to be used, the lead frame needs to be preheated, namely, the lead frame is heated to be consistent with or close to the temperature of a plastic package material, and heating equipment is needed to complete the process.

For example, chinese patent with publication number CN205680664U, wherein a preheating device for power device encapsulation is proposed, this patent is through setting up the hot plate, it is even to do benefit to chip lead frame to be heated, through setting up the locating pin, can ensure that chip lead frame is in the correct heating position, heating effect has been guaranteed, through setting up the locating piece, it is in the correct position to have guaranteed that the carrier is, it can be accurate corresponding with the heating bath to have indirectly guaranteed the position of chip lead frame on the carrier, heating effect has been guaranteed, but in this scheme, because use the hot plate to heat chip lead frame, the structure at preheating bench top is comparatively simple, the device that the scattered heat to the hot plate was gathered together and is held back, because of unnecessary heat can directly give off in the air, comparatively extravagant electric power.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a preheating device of power device encapsulation has solved because use the hot plate to heat the chip lead frame, and the structure at preheating bench top is comparatively simple, does not have the device that holds back that gathers together to the heat of giving off of hot plate, and therefore unnecessary heat can directly give off the air in, the problem of comparatively extravagant electric power.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a preheating arrangement for a power device package, comprising: the workstation, the fixed cover in inside of workstation has cup jointed the electric heating board, the top surface of electric heating board is provided with two chip lead frames, one side fixed mounting of workstation has the PLC controller, the PLC controller with electric heating board electric connection preheats the subassembly, it is in to preheat the subassembly setting the top surface of workstation, be used for right the chip lead frame preheats, it includes to preheat the subassembly: rotate the storehouse, it sets up to rotate the storehouse the top surface of workstation, one side fixed mounting who rotates the storehouse has two hinges, rotate the storehouse with the workstation is connected through the hinge, rotate one side in storehouse and seted up first spacing hole, the inside of rotating the storehouse is provided with the heat-conducting plate, the standing groove has been seted up to the top surface of heat-conducting plate, the standing groove with the chip lead frame activity is cup jointed, one side fixed mounting of heat-conducting plate has two to take the post, take the post with first spacing hole activity cup joints, the spacing hole of second has been seted up respectively to the both sides of rotating the storehouse, the second support column has been cup jointed in the interior round wall activity in the spacing hole of second, the rotor plate has been cup jointed in the inside activity in first spacing hole, the rotor plate with second support column fixed mounting.

In order to overturn the rotating bin in an electric mode, the utility model discloses a preheating device for power device encapsulation, the preferred, one side of workstation is provided with first connecting plate, circular through-hole has been seted up to one side of first connecting plate, first spacing post has been cup jointed in the activity of the interior round wall of circular through-hole, first spacing post with one side fixed mounting of workstation, the top surface fixed mounting of first connecting plate has electric putter, one side of rotating the bin is provided with the second connecting plate, the spacing hole of third has been seted up to one side of second connecting plate, the spacing post of second has been cup jointed in the activity of the interior round wall in the spacing hole of third, the spacing post of second with rotating bin fixed mounting, the second connecting plate with the top surface fixed mounting of electric putter's telescopic shaft, electric putter with PLC controller electric connection.

In order to separate the inside chip lead frame of standing groove, as the utility model discloses a preheating device of power device encapsulation, the preferred, the fixed division board that has cup jointed in inside of standing groove.

In order to observe the inside of rotating the storehouse, as the utility model discloses a preheating device of power device encapsulation, the preferred, first fixed orifices has been seted up to the top surface of rotating the storehouse, the fixed cup of inside of first fixed orifices has connect glass.

In order to survey the temperature of the inside of rotating the storehouse, as the utility model discloses a preheating device of power device encapsulation, the preferred, inside one side fixed mounting who rotates the storehouse has temperature sensor, temperature sensor with PLC controller electric connection.

In order to dispel the heat in the inside that advances to the workstation, as the utility model discloses a preheating device of power device encapsulation, the preferred, a plurality of louvre has been seted up to one side of workstation, the second fixed orifices has been seted up to the opposite side of workstation, the fixed radiator fan that has cup jointed of interior circle wall of second fixed orifices.

In order to support the workstation, as the utility model discloses a preheating device of power device encapsulation, the preferred, the bottom surface fixed mounting of workstation has the first support column of a plurality of.

To sum up, the utility model discloses mainly have following beneficial effect:

through taking column, standing groove, chip lead frame, electric heating plate, rotating storehouse, first spacing hole, first support column and the heat-conducting plate of mutually supporting use, can carry out gathering together of certain degree and holding back to the heat that the electric heating plate produced for during the heat is difficult to give off the air, reduced heat loss, and then saved electric power.

Through mutually supporting use of workstation, first spacing post, second support column, electric putter, rotation storehouse, second connecting plate and the spacing hole of third, can reach the effect that can electronic carry out the upset to rotating the storehouse, use through mutually supporting of division board and standing groove, can separate the inside chip lead frame of standing groove, use through mutually supporting of glass and first fixed orifices, can reach the effect of observing the inside in rotation storehouse.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic structural view of the electric heating plate of the present invention;

fig. 3 is a schematic structural view of the rotary bin of the present invention;

fig. 4 is a schematic structural view of the first connecting plate of the present invention.

Reference numerals: 1. a work table; 2. an electrical heating plate; 3. rotating the bin; 4. a first limiting hole; 5. a first support column; 6. a heat conducting plate; 7. a placement groove; 8. a chip lead frame; 9. handling the column; 10. a second limiting hole; 11. a rotating plate; 12. a second support column; 13. a first connecting plate; 14. an electric push rod; 15. a first limit post; 16. a second connecting plate; 17. a third limiting hole; 18. a second limit post; 19. a partition plate; 20. a first fixing hole; 21. glass; 22. a temperature sensor; 23. heat dissipation holes; 24. a second fixing hole; 25. a heat dissipation fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1, 2, 3 and 4, a preheating apparatus of a power device package includes: the automatic preheating device comprises a workbench 1, an electric heating plate 2 is fixedly sleeved in the workbench 1, two chip lead frames 8 are arranged on the top surface of the electric heating plate 2, a PLC controller is fixedly installed on one side of the workbench 1 and electrically connected with the electric heating plate 2, a preheating assembly is arranged on the top surface of the workbench 1 and used for preheating the chip lead frames 8, the preheating assembly comprises a rotating bin 3, the rotating bin 3 is arranged on the top surface of the workbench 1, two hinges are fixedly installed on one side of the rotating bin 3, the rotating bin 3 is connected with the workbench 1 through the hinges, a first limiting hole 4 is formed in one side of the rotating bin 3, a heat conducting plate 6 is arranged in the rotating bin 3, a placing groove 7 is formed in the top surface of the heat conducting plate 6, the placing groove 7 is movably sleeved with the chip lead frames 8, two movable holding columns 9 are fixedly installed on one side of the heat conducting plate 6, the holding columns 9 are movably sleeved with the first limiting hole 4, two sides of the rotating bin 3 are respectively provided with a second limiting hole 10, the inner circular wall surface of the second limiting hole 10 is movably sleeved with a second supporting column 12, the inner part of the first limiting hole 4 is movably sleeved with a rotating plate 11, the rotating plate 11 and the second supporting column 12 are fixedly installed, through the arranged holding column 9, when the chip lead frame 8 needs to be heated, a worker places the chip lead frame 8 inside the placing groove 7, then holds the holding column 9 to drive the heat conducting plate 6 to move and enable one side of the heat conducting plate 6 to push the rotating plate 11 to rotate, so that the heat conducting plate 6 is placed inside the rotating bin 3, and through the arranged electric heating plate 2, the electric heating plate 2 is started to heat the heat conducting plate 6, the heat conducting plate 6 conducts heat to the chip lead frame 8 uniformly, and further preheats the chip lead frame 8, and further conveniently packages a power device, and rotate the top of storehouse 3 at workstation 1, make the heat that the electric heating board 2 produced gather together in the inside that rotates storehouse 3, through the rotor plate 11 that sets up, rotor plate 11 can block the inside in first spacing hole 4, it spills over from first spacing hole 4 to reduce the heat, thereby carry out gathering together of certain degree and holding back to the heat that the electric heating board 2 produced, make the heat that the electric heating board 2 produced be difficult to give off in the air, heat loss has been reduced, and then electric power has been saved.

Referring to fig. 2, 3 and 4, a first connecting plate 13 is arranged on one side of a workbench 1, a circular through hole is formed on one side of the first connecting plate 13, a first limit post 15 is movably sleeved on the inner circular wall surface of the circular through hole, the first limit post 15 is fixedly mounted on one side of the workbench 1, an electric push rod 14 is fixedly mounted on the top surface of the first connecting plate 13, a second connecting plate 16 is arranged on one side of a rotating bin 3, a third limit hole 17 is formed on one side of the second connecting plate 16, a second limit post 18 is movably sleeved on the inner circular wall surface of the third limit hole 17, the second limit post 18 is fixedly mounted on the rotating bin 3, the second connecting plate 16 is fixedly mounted on the top surface of a telescopic shaft of the electric push rod 14, the electric push rod 14 is electrically connected with a PLC controller, when the rotating bin 3 needs to be turned over through the arranged workbench 1, start electric putter 14 and promote second connecting plate 16 and then drive and rotate storehouse 3 and overturn, division board 19 has been cup jointed to the inside fixed division board 19 that has rotated standing groove 7, division board 19 through the division board 19 that sets up, division board 19 can separate the inside chip lead frame 8 of standing groove 7, first fixed orifices 20 have been seted up to the top surface of rotating storehouse 3, the fixed cover in inside of first fixed orifices 20 has cup jointed glass 21, glass 21 through the setting, see through inside glass 21 and can observe and rotate storehouse 3, inside one side fixed mounting who rotates storehouse 3 has temperature sensor 22, temperature sensor 22 and PLC controller electric connection, a plurality of louvre 23 has been seted up to one side of workstation 1, second fixed orifices 24 has been seted up to the opposite side of workstation 1, radiator fan 25 has been cup jointed to the interior round wall of second fixed orifices 24, the bottom surface fixed mounting of workstation 1 has the first support post 5 of a plurality of.

The working principle is as follows: referring to fig. 1-4, when the chip lead frame 8 needs to be heated, the worker places the chip lead frame 8 inside the placing groove 7, and then takes up the holding column 9 to drive the heat conducting plate 6 to move and make one side of the heat conducting plate 6 push the rotating plate 11 to rotate, thereby putting the heat conducting plate 6 inside the rotating bin 3, and through the set electric heating plate 2, the electric heating plate 2 is started to heat the heat conducting plate 6, the heat conducting plate 6 conducts the heat to the chip lead frame 8 more uniformly, and further preheats the chip lead frame 8, and further conveniently encapsulates the power device, and the rotating bin 3 is at the top of the workbench 1, so that the heat generated by the electric heating plate 2 is gathered inside the rotating bin 3, through the rotating plate 11, the rotating plate 11 can block the inside of the first limit hole 4, and reduce the overflow of the heat from the first limit hole 4, thereby gathering and intercepting the heat generated by the electric heating plate 2 to a certain extent, so that the heat generated by the electric heating plate 2 is difficult to be dissipated into the air, thereby reducing the heat loss and further saving the electric power.

Through the workstation 1 that sets up, when needs will rotate storehouse 3 machine and overturn, start electric putter 14 and promote second connecting plate 16 and then drive and rotate storehouse 3 and overturn, through the division board 19 that sets up, division board 19 can separate the inside chip lead frame 8 of standing groove 7, and through the glass 21 that sets up, see through inside glass 21 can observe and rotate storehouse 3.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A preheating arrangement for a power device package, comprising:

the heating device comprises a workbench (1), wherein an electric heating plate (2) is fixedly sleeved in the workbench (1), two chip lead frames (8) are arranged on the top surface of the electric heating plate (2), a PLC (programmable logic controller) is fixedly installed on one side of the workbench (1), and the PLC is electrically connected with the electric heating plate (2);

a preheat assembly disposed on a top surface of the platen (1) for preheating the chip lead frame (8), the preheat assembly comprising: rotate storehouse (3), it sets up to rotate storehouse (3) the top surface of workstation (1), one side fixed mounting who rotates storehouse (3) has two hinges, rotate storehouse (3) with workstation (1) is connected through the hinge, first spacing hole (4) have been seted up to one side of rotating storehouse (3), the inside of rotating storehouse (3) is provided with heat-conducting plate (6), standing groove (7) have been seted up to the top surface of heat-conducting plate (6), standing groove (7) with chip lead frame (8) activity cup joints, one side fixed mounting of heat-conducting plate (6) has two to take and moves post (9), take move post (9) with first spacing hole (4) activity cup joints, the both sides of rotating storehouse (3) have been seted up second spacing hole (10) respectively, second support column (12) have been cup jointed in the interior round wall activity of second spacing hole (10), the inside activity of first spacing hole (4) has cup jointed rotor plate (11), rotor plate (11) with second support column (12) fixed mounting support column.

2. The preheating device of claim 1, wherein: one side of workstation (1) is provided with first connecting plate (13), circular through-hole has been seted up to one side of first connecting plate (13), first spacing post (15) have been cup jointed in the activity of the interior circle wall of circular through-hole, first spacing post (15) with one side fixed mounting of workstation (1), the top surface fixed mounting of first connecting plate (13) has electric putter (14), one side of rotating storehouse (3) is provided with second connecting plate (16), third spacing hole (17) have been seted up to one side of second connecting plate (16), the activity of the interior circle wall of third spacing hole (17) has been cup jointed second spacing post (18), second spacing post (18) with rotate storehouse (3) fixed mounting, second connecting plate (16) with the top surface fixed mounting of the telescopic shaft of electric putter (14), electric putter (14) with PLC controller electric connection.

3. The preheating device of claim 1, wherein: the inside of the placing groove (7) is fixedly sleeved with a separation plate (19).

4. The preheating device of claim 1, wherein: the top surface of the rotating bin (3) is provided with a first fixing hole (20), and glass (21) is fixedly sleeved inside the first fixing hole (20).

5. The preheating device of claim 1, wherein: rotate inside one side fixed mounting in storehouse (3) has temperature sensor (22), temperature sensor (22) with PLC controller electric connection.

6. The preheating device of claim 1, wherein: a plurality of radiating holes (23) are formed in one side of the workbench (1), second fixing holes (24) are formed in the other side of the workbench (1), and radiating fans (25) are fixedly sleeved on the inner circle wall surfaces of the second fixing holes (24).

7. The preheating device of claim 1, wherein: the bottom surface of the workbench (1) is fixedly provided with a plurality of first supporting columns (5).