CN218783953U

CN218783953U - Structure for preventing PCB from bowing

Info

Publication number: CN218783953U
Application number: CN202223034713.9U
Authority: CN
Inventors: 张钧诚; 孙宇; 邬锡峰
Original assignee: Changzhou Shuangjin Electric Co ltd
Current assignee: Changzhou Shuangjin Electric Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-03-31
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a structure for preventing a PCB from bowing, which comprises a fixed base; a motor is arranged above the top end of the fixed base, two groups of electric push rods are arranged below one end of the motor and above the fixed base, a ventilation shell is arranged at the top end of the surface of the fixed base, and an electric heating plate is arranged inside the surface of the fixed base; the utility model discloses a ventilation shell, vent and electric heating board and heat-conducting plate structure, it is minimum to realize that the thermal shock falls to the PCB influence, place the PCB board behind heat-conducting plate surface central point, and fix, electric heating board ohmic heating produces the heat after that, and transmit the PCB board with the heat through the heat-conducting plate, the vent of ventilation shell side blows hot-blast to PCB board surface simultaneously, make PCB board surface temperature, consequently, the thermal shock of avoiding the hot-blast tin spraying production in PCB board surface greatly leads to PCB board surface production bow, preheat through PCB board surface, make the thermal shock influence that PCB board surface received reduce, thereby guarantee that PCB board qualification rate increases, avoid the PCB board to produce bow and lead to manufacturing cost to increase.

Description

Structure for preventing PCB from bowing

Technical Field

The utility model relates to a PCB board technical field specifically is a structure of avoiding PCB board emergence bow.

Background

Printed circuit boards (also called Printed circuit boards) are providers of electrical connection of electronic components, and are generally represented by "PCBs" but cannot be called "PCBs"), and the Printed circuit boards are mainly designed as layout designs; the PCB has the advantages that wiring and assembly errors are greatly reduced, automation level and production labor rate are improved, the printed circuit board can be divided into a single-layer board, a double-sided board, a four-layer board, a six-layer board and other multilayer circuit boards according to the number of layers of the circuit boards, and in the processing process of the PCB, the surface of the PCB can be subjected to bow when the surface of the PCB is subjected to thermal shock, so that the PCB can not be subjected to bow in the processing process of the PCB through an anti-bow structure.

In the PCB processing process, the substrate is subjected to the action of heat and the action of various chemical substances for many times, so that when the hot air tin spraying is carried out on the surface of the PCB, the surface of the PCB can be subjected to thermal shock generated by hot air, and because the surface of the PCB does not have temperature in the processing process, the PCB is not well influenced by temperature difference, when the surface of the PCB is subjected to the thermal shock, the surface of the PCB can be enlarged to generate a bow phenomenon, so that SMT electronic element installation can not be carried out when the surface of the PCB generates the bow, or the electronic element (including an integrated block) and a welding point of a printed circuit board are not well contacted, or some pins can not be cut or can be cut into the substrate when the pins are cut after the electronic element is installed, so that the PCB is directly scrapped, and meanwhile, the production cost of the PCB is increased;

the PCB needs to be placed in the same-shaped mould to be fixed in the production process, then the PCB is processed, and in the production and processing process of the PCB, the sizes of the PCB which is often produced are different, so that the PCB with different sizes needs to be fixed and processed by different production fixing moulds, so that a single production device can not fix and process different PCBs, and the production effect of the PCB is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an avoid PCB board to take place structure of bow to propose in solving above-mentioned background art and increase PCB board manufacturing cost and cause the relatively poor problem of PCB board production effect.

The utility model provides a following technical scheme: a structure for preventing a PCB from bowing comprises a fixed base; a motor is arranged above the top end of the fixed base, two groups of electric push rods are arranged below one end of the motor and above the fixed base, a ventilation shell is arranged at the top end of the surface of the fixed base, and an electric heating plate is arranged inside the surface of the fixed base;

the top end of the electric heating plate is provided with a heat conducting plate, the inner side surface of the ventilation shell is provided with a ventilation opening, the outer side of the ventilation shell is provided with a ventilation pipe, and the ventilation pipe is communicated with the ventilation opening;

the output end of the motor is provided with a lead screw, two groups of moving blocks are arranged on the surface of the lead screw, the directions of threads at two ends of the surface of the lead screw are opposite, and the moving blocks are sleeved on the surface of the lead screw through a thread structure.

Preferably, the fixed base is provided with a mounting groove in the surface, and the electric heating plate is positioned in the mounting groove.

Preferably, the heat conducting plate is located at the inner center position of the ventilation shell, and the ventilation opening faces to the surface of the heat conducting plate.

Preferably, the top of unable adjustment base is equipped with the support frame, and the motor is fixed on the side top of support frame.

Preferably, a moving groove is formed in the position, corresponding to the screw rod, of the top end of the support frame, and a moving hole is formed in the position, corresponding to the moving block, of the lower portion of the top end of the support frame.

Preferably, the bottom of electric putter is equipped with the fixed plate, and the bottom of fixed plate is equipped with the rubber pad.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a ventilation shell, vent and electric heating board and heat-conducting plate structure, it is minimum to realize that the thermal shock falls to the PCB influence, place the PCB board behind heat-conducting plate surface central point, and fix, electric heating board ohmic heating produces the heat after that, and transmit the PCB board with the heat through the heat-conducting plate, the vent of ventilation shell side blows hot-blast to PCB board surface simultaneously, make PCB board surface temperature, consequently, the thermal shock of avoiding the hot-blast tin spraying production in PCB board surface greatly leads to PCB board surface production bow, preheat through PCB board surface, make the thermal shock influence that PCB board surface received reduce, thereby guarantee that PCB board qualification rate increases, avoid the PCB board to produce bow and lead to manufacturing cost to increase.

2. The utility model discloses a motor, lead screw and movable block and electric putter result, the realization is fixed the PCB board of unidimensional not, when heat-conducting plate surface central point put is placed to the PCB board, the motor is through rotating the output lead screw, and under the screw thread effect of lead screw opposite surface, make two sets of movable blocks in surface remove simultaneously, make the electric putter of movable block bottom remove the side on PCB board surface, carry out fixed mounting to the PCB board after that, consequently, avoid can only fixing processing to single PCB board, through adjusting the distance between two sets of electric putter, can satisfy the PCB board fixed processing to the difference, it fixes firmly to PCB board side simultaneously, avoid PCB board processing man-hour to take place the bow phenomenon, thereby improve the production efficiency of PCB board.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a main sectional view of the present invention;

fig. 3 is an enlarged schematic view of a in fig. 1 according to the present invention;

fig. 4 is an enlarged schematic view of B in fig. 2 according to the present invention.

In the figure: 1. a fixed base; 101. a support frame; 102. a moving groove; 103. moving the hole; 104. mounting grooves; 2. a motor; 201. a screw rod; 202. a moving block; 3. an electric push rod; 301. a fixing plate; 302. a rubber pad; 4. a ventilated casing; 401. a vent pipe; 402. a vent; 5. an electrical heating plate; 501. a heat conducting plate.

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 work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solution of the present invention will be further described in detail with reference to the drawings and specific embodiments.

The first embodiment is as follows:

the utility model provides a structure for avoiding PCB board bow, including unable adjustment base 1; a motor 2 is arranged above the top end of the fixed base 1, two groups of electric push rods 3 are arranged below one end of the motor 2 and above the fixed base 1, a ventilation shell 4 is arranged at the top end of the surface of the fixed base 1, and an electric heating plate 5 is arranged inside the surface of the fixed base 1;

the top end of the electric heating plate 5 is provided with a heat conducting plate 501, the inner side surface of the ventilation shell 4 is provided with a ventilation opening 402, the outer side of the ventilation shell 4 is provided with a ventilation pipe 401, and the ventilation pipe 401 is communicated with the ventilation opening 402;

specifically, as figure 1, figure 2 and figure 4 show, when using, electric heating plate 5 conducts heat to the heat-conducting plate 501 of aluminium alloy preparation, the heat that produces electric heating plate 5 leads to the product passes through the bottom surface that heat-conducting plate 501 transmitted the PCB board, lie in heat-conducting plate 501 ventilation shell 4 all around and be connected with external air heater with the help of ventilation pipe 401 after that, the hot-blast vent 402 that produces the air heater through the inside side of ventilation shell 4 blows to the surface of PCB board, make the PCB board surface have a certain temperature in the course of working, consequently, avoid the great PCB board surface production bow that leads to of the hot-blast tin spraying in PCB board surface, through preheating PCB board surface, make the influence that PCB board surface received reduce, thereby guarantee that PCB board qualification rate increases, avoid the PCB board to produce bow and lead to manufacturing cost to increase.

Further, a mounting groove 104 is formed in the surface of the fixed base 1, and the electric heating plate 5 is positioned in the mounting groove 104; the heat conducting plate 501 is located at the central position inside the ventilation housing 4, and the ventilation opening 402 faces the surface of the heat conducting plate 501;

specifically, as shown in fig. 2, when preheating the PCB to prevent damage by thermal shock, the electric heating plate 5 located inside the mounting groove 104 transfers the generated heat to the bottom surface of the PCB through the heat conductive plate 501 while surrounding the ventilation housing 4 around the heat conductive plate 501, and at the same time, the ventilation opening 402 facing the surface of the heat conductive plate 501 blows hot air to the surface of the PCB on the surface of the heat conductive plate 501.

The utility model discloses a PCB board, including PCB board, the PCB board is placed in the mould of the same shape and is fixed for solving above-mentioned PCB board in process of production, need fix the PCB board in the mould of the same shape, then process at the PCB board, and in PCB board production and processing process, the PCB board size of often producing is beaten inequality, therefore need when fixing the processing to the PCB board of different sizes, need use different production fixed mould, make single production facility can't fix the processing to different PCB boards simultaneously, thereby cause the relatively poor problem of PCB board production effect, this application discloses a structure of avoiding the PCB board to bow, lead screw 201 is installed to the output of motor 2, the surface of lead screw 201 is equipped with two sets of movable blocks 202, the surface both ends screw direction of lead screw 201 is opposite, movable block 202 suits the surface of lead screw 201 through the helicitic texture; the top end of the fixed base 1 is provided with a support frame 101, and the motor 2 is fixed at the top end of the side surface of the support frame 101; a moving groove 102 is formed in the position, corresponding to the lead screw 201, of the top end of the inner portion of the support frame 101, and a moving hole 103 is formed in the position, corresponding to the moving block 202, of the lower portion of the top end of the support frame 101; the bottom end of the electric push rod 3 is provided with a fixed plate 301, and the bottom end of the fixed plate 301 is provided with a rubber pad 302;

specifically, as shown in fig. 1, fig. 2 and fig. 3, when fixing the PCB, the PCB is first placed at the central position of the surface of the heat conducting plate 501, the motor 2 on the side of the top end of the supporting frame 101 drives the lead screw 201 inside the moving groove 102 to rotate, and the screw thread on the surface opposite to the surface of the lead screw 201 drives the moving block 202 to move inside the moving groove 102, the moving block 202 is limited by the moving hole 103 during moving, after the moving block 202 drives the electric push rod 3 on the bottom end to move to a specified position, the electric push rod 3 drives the fixing plate 301 on the bottom end to move towards the surface of the PCB, so that the rubber pad 302 at the bottom end of the fixing plate 301 contacts the PCB and extrudes the PCB, the rubber pad 302 avoids extruding damage to the surface of the PCB, thereby avoiding fixing a single PCB, and by adjusting the distance between two sets of electric push rods 3, fixing different PCBs can be fixed, and at the side of the PCB is firmly fixed, thereby avoiding the occurrence of bowing phenomenon during PCB processing, and improving the production efficiency of PCBs.

The working principle is as follows: during the use, place the PCB board behind heat-conducting plate 501 surface central point, motor 2 drives lead screw 201 and rotates, two sets of movable blocks 202 on control lead screw 201 surface move, make movable block 202 bottom electric putter 3 move PCB board surface both sides, electric putter 3 is fixed the PCB board through fixed plate 301 and rubber pad 302 of bottom after that, can fix not unidimensional PCB board through adjusting the distance between electric putter 3, after that when carrying out hot-blast tin spraying to PCB board surface, the bottom surface of PCB board is transmitted through heat-conducting plate 501 to the heat that electric heating board 5 will produce, ventilation housing 4 blows hot-blast to the surface of PCB board through ventilation pipe 401 and vent 402 simultaneously, make PCB board surface from taking the temperature, the thermal shock that produces when avoiding hot-blast tin spraying causes the influence to PCB board surface under the normal atmospheric temperature, make PCB board surface can bear the influence that the thermal shock brought.

Finally, it is to be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified and replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. A structure for preventing a PCB from bowing comprises a fixed base (1); the method is characterized in that: a motor (2) is arranged above the top end of the fixed base (1), two groups of electric push rods (3) are arranged below one end of the motor (2) and above the fixed base (1), a ventilation shell (4) is arranged at the top end of the surface of the fixed base (1), and an electric heating plate (5) is arranged inside the surface of the fixed base (1);

the top end of the electric heating plate (5) is provided with a heat conducting plate (501), the inner side surface of the ventilation shell (4) is provided with a ventilation opening (402), the outer side of the ventilation shell (4) is provided with a ventilation pipe (401), and the ventilation pipe (401) is communicated with the ventilation opening (402);

the output end of the motor (2) is provided with a lead screw (201), the surface of the lead screw (201) is provided with two groups of moving blocks (202), the directions of threads at two ends of the surface of the lead screw (201) are opposite, and the moving blocks (202) are sleeved on the surface of the lead screw (201) through a thread structure.

2. The structure of claim 1, wherein the structure for avoiding bowing of the PCB comprises: the surface of the fixing base (1) is internally provided with a mounting groove (104), and the electric heating plate (5) is positioned in the mounting groove (104).

3. The structure of claim 1, wherein the structure for avoiding bowing of the PCB comprises: the heat conducting plate (501) is located in the center of the inside of the ventilation shell (4), and the ventilation opening (402) faces the surface of the heat conducting plate (501).

4. The structure of claim 1, wherein the structure for avoiding bowing of the PCB comprises: the top of unable adjustment base (1) is equipped with support frame (101), and motor (2) are fixed on the side top of support frame (101).

5. The structure for preventing the PCB from bowing according to claim 4, wherein: the inner top end of the support frame (101) is provided with a moving groove (102) at a position corresponding to the screw rod (201), and a moving hole (103) is formed in a position corresponding to the moving block (202) below the top end of the support frame (101).

6. The structure of claim 1, wherein the structure for avoiding bowing of the PCB comprises: the bottom of electric putter (3) is equipped with fixed plate (301), and the bottom of fixed plate (301) is equipped with rubber pad (302).