Preheating base and hot press

Abstract

The utility model relates to the technical field of PCBA manufacturing and processing, in particular to a preheating base and a hot press. Comprising a fixing plate, a heating table, a hot air gun head and a fan, and the fixing plate is used for containing a PCB; the heating table is arranged on one side face of the fixing plate, an air inlet pipe and an air outlet pipe are arranged in the length direction of the heating table and communicate with each other through a communicating piece, and a heat conduction groove is formed in one side of the heating table; a heat conduction cavity used for being connected with the heat conduction groove is formed in the side, facing the heating table, of the hot air gun head, the heat conduction cavity is of a hollow structure, a first open hole is formed in the side, facing the heating table, of the heat conduction cavity, a second open hole corresponding to the heat conduction cavity is formed in the hot air gun head, the second open hole communicates with the first open hole, and a heating wire is arranged on one side of the hot air gun head; and the fan is driven by the rotating motor and is arranged corresponding to the heating wire. The problems that in the prior art, due to the fact that the heating temperature of a preheating base of a hot press is unstable and uneven, a PCB is heated unevenly, and the product quality is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCBA manufacturing and processing, in particular to a preheating base and a hot press. Background Art

[0002] PCBA board, also known as printed circuit board, is an important electronic component, a support for electronic components, and a provider of circuit connections for electronic components. In the production process of PCBA board, in order to form the required shape and structure of PCBA board, hot pressing equipment is generally used to perform hot pressing on PCB board. Hot pressing has become an indispensable process in the production of PCBA board.

[0003] The hot press machines currently used in the market for PCBA processing are usually equipped with a preheating base that can accommodate and heat the PCB. However, the existing hot press machines cannot ensure that the temperature of the preheating base remains stable and uniform during the processing, which will cause uneven heating during the heating process of the PCB, affecting the quality of the product. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a preheating base and a heat press to solve the problem that the heating temperature of the preheating base of the heat press in the prior art is unstable and uneven, resulting in uneven heating of the PCB board and affecting product quality.

[0005] In the first aspect, the utility model discloses a preheating base for connecting to a hot press machine, comprising: a fixed plate, a heating platform, a hot air gun head and a fan, wherein the fixed plate is used to accommodate a PCB board; the heating platform is arranged on one side of the fixed plate, and an air inlet pipe and an air outlet pipe that penetrate the heating platform are respectively arranged along the length direction of the heating platform, the air inlet pipe and the air outlet pipe are connected by a connecting piece, and a heat conduction groove is arranged on the side of the heating platform away from the fixed plate; a heat conduction cavity for connecting with the heat conduction groove is arranged on the side of the hot air gun head facing the heating platform, the heat conduction cavity is a hollow structure, a first opening is opened on the side of the heat conduction cavity facing the heating platform, a second opening corresponding to the heat conduction cavity is arranged on the hot air gun head, and the second opening is connected to the first opening, and a heating wire is arranged on the side of the hot air gun head away from the heating platform; the fan is driven by a rotating motor and is arranged corresponding to the heating wire.

[0006] Optionally, a slot penetrating the fixing plate is provided on the fixing plate, and a connecting seat corresponding to the slot is provided on a side of the heating platform facing the fixing plate.

[0007] Optionally, the heating platform is further provided with a first mounting hole, which is arranged along the height direction of the heating platform, and the hot air gun head is provided with a second mounting hole corresponding to the first mounting hole, and the heating platform is connected to the heating platform by connecting the first mounting hole and the second mounting hole through a connecting piece.

[0008] Optionally, the heat-conducting cavity includes a column cavity and a vertebral cavity connected to each other, the first opening is arranged at the end of the vertebral cavity, and the heat-conducting groove includes a first cylindrical groove corresponding to the column cavity, a second cylindrical groove corresponding to the vertebral cavity, and a third cylindrical groove arranged corresponding to the first opening.

[0009] Optionally, the fan is connected to the hot air gun head via a connecting shaft, a spiral groove is provided on the connecting shaft, and the heating wire is arranged in the spiral groove.

[0010] Optionally, a plurality of connecting strips are arranged at intervals along the radial direction of the second opening, the plurality of connecting strips intersect at the center of the second opening, and the connecting axis is arranged at the center.

[0011] Optionally, the radius of the air inlet pipe is greater than the radius of the air outlet pipe.

[0012] Optionally, the preheating base further includes a temperature sensor, and receiving grooves are respectively provided on two opposite sides of the heating platform, the receiving grooves are respectively connected to the air inlet pipe and the air outlet pipe, and the temperature sensor is arranged in the receiving grooves.

[0013] Optionally, a limiting groove is provided on a side of the fixing plate facing away from the heating platform for accommodating a PCB board.

[0014] In a second aspect, the utility model further discloses a hot press, comprising a hot press body and a preheating base as described in any one of the above items, wherein the preheating base is arranged on the hot press body.

[0015] Compared with the prior art, the beneficial effects of the preheating base and the hot press provided by the embodiment of the utility model are as follows: one side of the fixed plate in the preheating base is used to place the PCB board, and then a heating platform, a hot air gun head and a fan are arranged on the other side of the fixed plate, a heat conduction groove is arranged on the side of the heating platform facing the hot air gun head, and a heat conduction cavity corresponding to the heat conduction groove is arranged on the hot air gun head, which is used to blow the air heated by the heating wire from bottom to top to the heat conduction cavity through the fan, and then the heat conduction cavity transfers the heat to the heat conduction groove, and finally achieves heating of the fixed plate and the PCB board placed on the fixed plate. An air inlet pipe and an air outlet pipe that are interconnected are arranged on the heating platform, and the air inlet pipe is used to introduce a gas medium with a lower temperature from the outside into the heating platform to absorb the excess heat generated by the heating platform during the heating process, so as to help the heating platform cool down. After the cold air medium in the air inlet pipe absorbs a large amount of heat from the heating platform to help the heating platform cool down, the gas medium with a higher temperature is transported to the air outlet pipe through the connecting piece, and the gas medium with a higher temperature is sent away from the heating platform through the air outlet pipe, thereby achieving the purpose of helping the heating platform cool down. The airflow in the air inlet and outlet pipes can exchange heat with the heating table to help the heating table stabilize the temperature, avoid excessive temperature and large temperature fluctuations, ensure uniform heating of the fixed plate, avoid local overheating or overcooling, and the occurrence of unstable heating effects of the fixed plate, so that the preheating base can heat materials such as PCB boards stably and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of a preheating base provided in an embodiment of the utility model;

[0018] Figure 2 It is an exploded schematic diagram of a preheating base provided in an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of a fixing plate provided in an embodiment of the utility model;

[0020] Figure 4 This is one of the schematic diagrams of the heating platform provided in the embodiment of the utility model;

[0021] Figure 5 This is the second schematic diagram of the heating platform provided by the embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of a hot air gun head provided by an embodiment of the utility model;

[0023] Figure 7 This is the second schematic diagram of the hot air gun head provided by the embodiment of the utility model;

[0024] Figure 8 yes Figure 7 A partial enlarged schematic diagram of position A in the middle.

[0025] The reference numerals in the figures are:

[0026] 1000, preheating base; 100, fixing plate; 101, slot; 102, limiting slot; 200, heating table; 201, air inlet pipe; 202, air outlet pipe; 203, heat conduction slot; 2031, first cylindrical slot; 2032, second cylindrical slot; 2033, third cylindrical slot; 204, first mounting hole; 205, connecting seat; 206, accommodating slot; 300, hot air gun head; 301, heat conduction cavity; 3011, column cavity; 3012, cone cavity; 302, first opening; 303, second opening; 3031, connecting strip; 304, second mounting hole; 400, heating wire; 500, fan; 501, connecting shaft; 5011, spiral groove. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0028] The present invention provides a preheating base 1000 for connecting with a heat press machine. Figure 1-2 As shown, the preheating base 1000 includes: a fixing plate 100, a heating platform 200, a hot air gun head 300 and a fan 500. The fixing plate 100 is used to accommodate the PCB board. The heating platform 200 is arranged on one side of the fixing plate 100. An air inlet pipe 201 and an air outlet pipe 202 that penetrate the heating platform 200 are respectively arranged along the length direction of the heating platform 200. The air inlet pipe 201 is connected to the air outlet pipe 202 through a connecting piece. A heat conduction groove 203 is arranged on the side of the heating platform 200 away from the fixing plate 100; the hot air gun head 300 faces A heat-conducting cavity 301 for connecting to the heat-conducting groove 203 is provided on one side of the heating platform 200. The heat-conducting cavity 301 is a hollow structure. A first opening 302 is provided on the side of the heat-conducting cavity 301 facing the heating platform 200. A second opening 303 corresponding to the heat-conducting cavity 301 is provided on the hot air gun head 300, and the second opening 303 is connected to the first opening 302. A heating wire 400 is provided on the side of the hot air gun head 300 away from the heating platform 200; the fan 500 is driven by a rotating motor and is arranged corresponding to the heating wire 400.

[0029] One side of the fixed plate 100 in the preheating base 1000 is used to place the PCB board, and then the heating platform 200, the hot air gun head 300 and the fan 500 are arranged on the other side of the fixed plate 100. A heat conduction groove 203 is arranged on the side of the heating platform 200 facing the hot air gun head 300, and a heat conduction cavity 301 corresponding to the heat conduction groove 203 is arranged on the hot air gun head 300, which is used to blow the air heated by the heating wire 400 from bottom to top to the heat conduction cavity 301 through the fan 500, and then the heat conduction cavity 301 transfers the heat to the heat conduction groove 203, and finally achieves heating of the fixed plate 100 and the PCB board placed on the fixed plate 100. The heating platform 200 is provided with an inlet pipe 201 and an outlet pipe 202 that are interconnected. The inlet pipe 201 is used to introduce a gas medium with a lower temperature from the outside into the heating platform 200 to absorb the excess heat generated by the heating platform 200 during the heating process, so as to help the heating platform 200 cool down. After absorbing a large amount of heat from the heating platform 200 to help the heating platform 200 cool down, the cold air medium in the air inlet pipe 201 transports the gas medium with increased temperature to the air outlet pipe 202 through the connecting piece, and transports the gas medium with higher temperature away from the heating platform 200 through the air outlet pipe 202, thereby achieving the purpose of helping the heating platform 200 cool down. The airflow in the air inlet pipe 201 and the air outlet pipe 202 can exchange heat with the heating platform 200 to help the heating platform 200 stabilize the temperature, avoid excessive temperature and large temperature fluctuations, ensure uniform heating effect on the fixing plate 100, avoid local overheating or overcooling, and the problem of unstable heating effect of the fixing plate 100, so that the preheating base 1000 can heat materials such as PCB boards stably and continuously.

[0030] Specifically, a heat conduction groove 203 is provided on the side of the heating platform 200 away from the fixed plate 100, and a heat conduction cavity 301 and a heating wire 400 are provided on the hot air gun head 300. The movement of the fan 500 driven by the rotating motor can make the hot air move toward the heat conduction cavity 301, thereby realizing the driving of the hot air, and realizing the heating of the fixed plate 100 and the PCB board placed on the fixed plate 100, so that the heating of the preheating base 1000 is uniform and efficient. The air inlet pipe 201 and the air outlet pipe 202 are provided to control the inflow of cold air and the outflow of hot air, realize the adjustment of the hot air temperature and speed, so as to realize the stable control of the temperature of the heating platform 200, so as to meet the different heating requirements of PCB boards of different sizes and models placed on the fixed plate 100.

[0031] Specifically, the design structure of the entire preheating base 1000 is compact, and the various components cooperate with each other. The fan 500 is arranged corresponding to the heating wire 400 provided on the hot air gun head 300, so that the fan 500 can directly blow the hot air heated by the heating wire 400, effectively improving the uniformity of the heating of the preheating base 1000.

[0032] It should be noted that the air inlet pipe 201 and the air outlet pipe 202 are connected via a connecting piece, and the connecting piece may be a U-shaped pipe or a hose.

[0033] refer to Figure 2 and Figure 3 The fixing plate 100 is provided with a slot 101 penetrating the fixing plate 100 , and the heating platform 200 is provided with a connecting seat 205 corresponding to the slot 101 on one side facing the fixing plate 100 .

[0034] The slot 101 provided on the fixing plate 100 and the connection seat 205 on the heating platform 200 can achieve a stable connection, ensuring that the connection between the heating platform 200 and the fixing plate 100 is firm and reliable and not easy to loosen or fall off. At the same time, the connection method between the slot 101 and the connection seat 205 allows the heating platform 200 to be easily inserted into or pulled out of the fixing plate 100, making the disassembly and installation process of the preheating base 1000 more convenient and efficient.

[0035] Specifically, the design of the slot 101 and the connecting seat 205 can enhance the overall structural stability of the preheating base 1000, avoid shaking or instability during operation, and ensure that the heating process is safe and reliable.

[0036] It should be noted that the connection seat 205 can be exposed on the other side of the slot 101, and a structure for positioning with the PCB board is provided on the exposed side of the connection seat 205, so as to cooperate with the entire fixing plate 100 to position and accommodate PCB boards of different sizes and models.

[0037] refer to Figure 4 and Figure 5 A first mounting hole 204 is also provided on the heating platform 200, and the first mounting hole 204 is arranged along the height direction of the heating platform 200. A second mounting hole 304 corresponding to the first mounting hole 204 is provided on the hot air gun head 300, and the heating platform 200 is connected to the heating platform 200 by connecting the first mounting hole 204 and the second mounting hole 304 through a connecting piece.

[0038] The first mounting hole 204 and the second mounting hole 304 are connected by a connector, so that the heating platform 200 and the hot air gun head 300 can be firmly connected. This helps to ensure the stability of the connection between the heating platform 200 and the hot air gun head 300, avoid loosening or falling off during use, and ensure the stability and reliability of the preheating base 1000 during the heating process.

[0039] Specifically, the corresponding arrangement of the first mounting hole 204 and the second mounting hole 304 can realize the precise positioning of the heating platform 200 and the hot air gun head 300 during installation. It can help the hot air gun head 300 to be conveniently and quickly installed and removed from the heating platform, which helps to simplify the installation process of the preheating base 1000 and improve efficiency. On the other hand, the precise positioning between the heating platform 200 and the hot air gun head 300 can help the hot gas medium to be accurately blown to the heat conduction groove 203 in the heating platform 200, thereby improving the heating uniformity of the preheating base 1000.

[0040] refer to Figure 2 , Figures 4 to 7 The heat-conducting cavity 301 includes a column cavity 3011 and a cone cavity 3012 connected to each other, the first opening 302 is arranged at the end of the cone cavity 3012, and the heat-conducting groove 203 includes a first cylindrical groove 2031 corresponding to the column cavity 3011, a second cylindrical groove 2032 corresponding to the cone cavity 3012, and a third cylindrical groove 2033 arranged corresponding to the first opening 302.

[0041] The column cavity 3011 is arranged correspondingly to the first column groove 2031, the cone cavity is arranged correspondingly to the second column groove 2032, and the first opening 302 arranged at the top of the cone groove is arranged correspondingly to the third column groove 2033. On the one hand, it can ensure that the heat-conducting cavity 301 parts with different structures are adapted to the heat-conducting groove 203 with corresponding structures, so as to optimize the heat conduction effect inside the heat-conducting cavity 301 and ensure uniform heat transmission. On the other hand, the cone cavity 3012 gradually reduces the diameter so that the diameter of the first opening 302 is smaller, so that the hot gas medium in the cone cavity 3012 can rush out from the first opening 302 at a faster moving speed, achieving the effect of accelerating and pressurizing the hot gas medium, ensuring that the hot gas can completely fill the entire third column groove 2033, reducing heat loss, and achieving a stable and uniform heating effect of the heating table 200.

[0042] Specifically, the first opening 302 is located at the end of the vertebral cavity 3012 and is arranged corresponding to the third cylindrical groove 2033. The hot gas medium moves into the third cylindrical groove 2033 through the first opening 302, which can effectively reduce the distance between the hot gas medium and the PCB board on the mounting plate, control the heat transmission path in the heat conduction cavity 301, reduce heat loss, and ensure that the heat is transmitted and distributed according to the design requirements.

[0043] Specifically, the arrangement of the first opening 302 , the first cylindrical groove 2031 , the second cylindrical groove 2032 and the third cylindrical groove 2033 can help achieve uniform distribution of heat in the heat conduction cavity 301 , avoid local overheating or overcooling, and improve the heating effect of the heating platform 200 on the PCB board.

[0044] It should be noted that the heat conduction cavity 301 is arranged corresponding to the connection seat 205. The radius of the third cylindrical groove 2033 is smaller than the radius of the second cylindrical groove 2032 and smaller than the radius of the first cylindrical groove 2031, so as to achieve the concentration and stability of the hot gas medium.

[0045] refer to Figures 6 to 8 The fan 500 is rotatably connected to the hot air gun head 300 via a connecting shaft 501 . A spiral groove 5011 is provided on the connecting shaft 501 , and the heating wire 400 is disposed in the spiral groove 5011 .

[0046] The spiral groove 5011 on the connecting shaft 501 can provide connection support for the fan 500, so that the connection between the fan 500 and the hot air gun head 300 is more stable, reducing shaking or looseness caused by rotation. At the same time, the fan 500 can be rotatably connected to the hot air gun head 300, and the fan 500 can be rotated relative to the hot air gun head 300 to blow the hot gas heated by the heating wire 400 into the heat conduction cavity 301.

[0047] Specifically, the heating wire 400 is arranged in the spiral groove 5011 on the connecting shaft 501, which can facilitate the heating wire to heat the connecting shaft 501 and the air around the fan 500, facilitate the fan 500 to blow the hot gas, ensure the corresponding matching between the heating wire 400 and the fan 500, and improve the hot air transmission efficiency.

[0048] On the other hand, the design of the spiral groove 5011 allows the heating wire 400 to be installed on the connecting shaft 501 in a spiral shape, which can increase the contact area of ​​hot air conduction and improve the hot air transmission efficiency. It can also ensure that the heating wire can evenly heat the surrounding air in the circumferential direction of the connecting shaft 501 to ensure uniform distribution of hot gas.

[0049] refer to Figures 6 to 8 A plurality of connecting strips 3031 are arranged at intervals along the radial direction of the second opening 303 , and the plurality of connecting strips 3031 intersect at the center of the second opening 303 , and the connecting shaft 501 is arranged at the center.

[0050] The plurality of connecting strips 3031 arranged at the second opening 303 intersect at the center of the circle, which can enhance the stability and strength of the overall structure. The arrangement of the connecting strips 3031 can effectively disperse the load, reduce vibration and deformation, and improve the stability and reliability of the preheating base 1000. At the same time, it can also facilitate the connection between the connecting shaft 501, the fan 500 and the hot air gun head 300.

[0051] Specifically, the plurality of connecting strips 3031 are radially spaced apart along the second opening 303 , which can evenly distribute the borne force and pressure, reduce local stress concentration, and extend the service life of the preheating base 1000 .

[0052] The multiple connecting strips 3031 intersect at the center of the circle, which can ensure that the connecting shaft 501 can have a larger area connected to the connecting strips 3031, ensure the accuracy and stability of the connection, and avoid problems caused by position offset. It can also ensure that the connecting shaft 501 is located at the center of the entire second opening 303, ensuring that the fan 500 can evenly blow the hot gas heated by the heating wire 400.

[0053] refer to Figure 1 , Figure 2 and Figure 4 , the radius of the air inlet pipe 201 is greater than the radius of the air outlet pipe 202 .

[0054] The radius of the air inlet pipe 201 is greater than the radius of the air outlet pipe 202, so that the air inlet pipe 201 has a larger cross-sectional area than the air outlet pipe 202, thereby increasing the air intake amount of the gas medium with a lower temperature, so as to obtain more low-temperature gas to participate in heat exchange in the heating platform 200, thereby improving the cooling and balancing effect of the temperature of the heating platform 200.

[0055] Specifically, the radius of the air inlet pipe 201 is greater than the radius of the air outlet pipe 202, and the low-temperature gas can flow slowly in the heating platform 200 through the air inlet pipe 201, and fully exchange heat with the heating platform 200 to take away excess heat. At the same time, the high-temperature gas after heat exchange with the heating platform 200 can flow out quickly in the heating platform 200. The difference in the radius of the air inlet pipe 201 and the air outlet pipe 202 can optimize the flow path of the high-temperature gas and the low-temperature gas in the heating platform 200, and improve the uniformity of heating of the preheating base 1000.

[0056] In an optional embodiment of the present invention, the preheating base 1000 further includes a temperature sensor, and the heating platform 200 is provided with a receiving groove 206 on opposite sides thereof (refer to Figure 2 ), the containing tank 206 is respectively connected to the air inlet pipe 201 and the air outlet pipe 202, and the temperature sensor is arranged in the containing tank 206.

[0057] Receiving grooves 206 connected to the air inlet pipe 201 and the air outlet pipe 202 are respectively arranged on both sides of the heating platform 200, and the temperature sensor is placed in the receiving groove 206, which can ensure that the temperature sensor is in close contact with the heating platform 200 and can directly monitor the temperature inside the heating platform 200, so as to facilitate the user to accurately monitor and control the heating process of the heating platform 200.

[0058] Specifically, placing the temperature sensor in the receiving groove 206 can effectively protect the temperature sensor from external interference or damage, extend the service life of the temperature sensor, and ensure its normal operation and accurate temperature measurement. On the other hand, placing the temperature sensor in the receiving groove 206 connected to the outlet pipe 202 and the inlet pipe 201 can directly measure and monitor the temperature in the heating table 200, reduce the measurement error of the temperature sensor, and improve the accuracy of temperature monitoring.

[0059] Specifically, the receiving groove 206 makes it easier to install, disassemble and replace the temperature sensor, facilitates the maintenance and care of the temperature sensor, and maintains the stability and reliability of the preheating base 1000 .

[0060] It should be noted that in the optional embodiments of the present utility model, the temperature sensor (temperature transducer) refers to a sensor that can sense temperature and convert it into a usable output signal. Temperature sensors can be divided into two categories according to the measurement method: contact and non-contact. According to the sensor material and electronic component characteristics, they can be divided into two categories: thermal resistors and thermocouples. Considering the application environment, non-contact temperature sensing is selected in this embodiment. Its sensitive element does not contact the object being measured, and it is also called a non-contact temperature measuring instrument. This type of temperature sensor commonly seen on the market is a non-contact temperature measuring instrument.

[0061] It should be noted that there are many ways to design the temperature sensor. For example, a temperature sensor can be disposed in each of the receiving grooves 206 on both sides, or a temperature sensor can be disposed in one of the receiving grooves 206 on both sides.

[0062] refer to Figure 1 and Figure 3 A limiting groove 102 is provided on a side of the fixing plate 100 facing away from the heating platform 200 for accommodating the PCB board.

[0063] The fixing plate 100 is provided with a limiting groove 102 on the side away from the heating platform 200 for accommodating the PCB board, which can provide a stable support and fixation for the PCB board, ensuring that the PCB board maintains a stable position during the heating process. It helps to prevent the PCB board from moving or shaking during the heating process, ensuring the heating effect and heating uniformity. By fixing the PCB board by the limiting groove 102, it can ensure that the contact between the PCB board and the heating platform 200 is closer, thereby improving the heating uniformity of the preheating base 1000.

[0064] By fixing the PCB board with the limiting groove 102, the PCB board can be positioned during the heating process to ensure that the position and posture of the PCB board remain stable, which is conducive to improving the processing accuracy and processing quality of the preheating base 1000. The limiting groove 102 can make it easier for the operator to place the PCB board in the preheating base 1000 and take it out. This helps to improve the operating efficiency and convenience.

[0065] It should be noted that the limiting groove 102 arranged on the side of the fixing plate 100 away from the heating platform 200 has multiple limiting protrusions and grooves for limiting, so as to enable the fixing plate 100 to accommodate and position PCB boards of different models and sizes.

[0066] The embodiment of the utility model further provides a hot press machine, which includes a hot press machine body and the preheating base 1000 in the above embodiment, and the preheating base 1000 is arranged on the hot press machine body.

[0067] The heat press comprises the same structure and beneficial effects as the preheating base 1000 in the previous embodiment. The structure and beneficial effects of the preheating base 1000 have been described in detail in the previous embodiment and will not be repeated here.

[0068] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A preheating base, used to connect with a hot press, characterized in that: include: A fixing plate, the fixing plate is used to accommodate the PCB board; A heating platform, the heating platform is arranged on one side of the fixed plate, an air inlet pipe and an air outlet pipe passing through the heating platform are respectively arranged along the length direction of the heating platform, the air inlet pipe and the air outlet pipe are connected through a connecting piece, and a heat conduction groove is arranged on the side of the heating platform away from the fixed plate; A hot air gun head, wherein a heat conduction cavity for connecting to the heat conduction groove is provided on the side of the hot air gun head facing the heating platform, the heat conduction cavity is a hollow structure, a first opening is provided on the side of the heat conduction cavity facing the heating platform, a second opening corresponding to the heat conduction cavity is provided on the hot air gun head, and the second opening is connected to the first opening, and a heating wire is provided on the side of the hot air gun head away from the heating platform; A fan is driven by a rotating motor and is arranged corresponding to the heating wire.

2. The preheating base according to claim 1, characterized in that: The fixing plate is provided with a slot penetrating the fixing plate, and the heating platform is provided with a connecting seat corresponding to the slot on one side facing the fixing plate.

3. The preheating base according to claim 1, characterized in that: The heating platform is also provided with a first mounting hole, which is arranged along the height direction of the heating platform. The hot air gun head is provided with a second mounting hole corresponding to the first mounting hole. The heating platform is connected to the heating platform by connecting the first mounting hole and the second mounting hole through a connecting piece.

4. The preheating base according to claim 1, characterized in that: The heat-conducting cavity includes a column cavity and a cone cavity connected to each other, the first opening is arranged at the end of the cone cavity, and the heat-conducting groove includes a first cylindrical groove corresponding to the column cavity, a second cylindrical groove corresponding to the cone cavity, and a third cylindrical groove arranged corresponding to the first opening.

5. The preheating base according to claim 1, characterized in that: The fan is connected to the hot air gun head via a connecting shaft, a spiral groove is provided on the connecting shaft, and the heating wire is arranged in the spiral groove.

6. The preheating base according to claim 5, characterized in that: A plurality of connecting strips are arranged at intervals along the radial direction of the second opening, and the plurality of connecting strips intersect at the center of the second opening, and the connecting axis is arranged at the center.

7. The preheating base according to claim 1, characterized in that: The radius of the air inlet pipe is greater than the radius of the air outlet pipe.

8. The preheating base according to claim 1, characterized in that: The preheating base also includes a temperature sensor. The heating platform is provided with receiving grooves on two opposite sides. The receiving grooves are respectively connected to the air inlet pipe and the air outlet pipe. The temperature sensor is arranged in the receiving grooves.

9. The preheating base according to any one of claims 1 to 8, characterized in that: A limiting groove is provided on a side of the fixing plate away from the heating platform for accommodating a PCB board.

10. A hot press, characterized in that: It comprises a hot press body and the preheating base according to any one of claims 1 to 9, wherein the preheating base is arranged on the hot press body.

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