High-precision powder packaging machine

Abstract

The invention relates to the technical field of electronic device powder packaging, and provides a high-precision powder packaging machine which comprises a lifting hanging frame, a heating box and a powder box which are sequentially arranged from top to bottom, the heating box comprises a box body and a circulating fan installed on the box body, and a heating channel for electronic devices to pass through is formed in the center of the box body; a cavity is formed between the inner wall and the outer wall of the box body, a heating element is arranged in the cavity, an air inlet is formed in one end of the inner wall of the box body, an air outlet is formed in the other end of the inner wall of the box body, and the circulating fan sucks airflow in the heating channel into the cavity from the air inlet and discharges the airflow into the heating channel from the air outlet, so that circulating hot air is formed in the heating channel. A dynamic heating environment is formed, and the heating uniformity of the electronic device is improved, so that the thickness consistency of insulating powder adhered to each part of the electronic device is improved, and the encapsulating precision of the electronic device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic device powder packaging, in particular to a high-precision powder packaging machine. Background Art

[0002] Powder encapsulation is a thermal coating technology that aims to melt insulating powder onto the surface of electronic devices (such as capacitors, certain resistors, etc.) to form a uniform insulating protective layer on the surface of the electronic devices.

[0003] Existing encapsulation machines usually include a liftable hanger (for mounting electronic devices), a heating box and a powder box (the powder box is usually connected to a fluidizing mechanism to fluidize the powder). When working, the electronic device is first heated in the heating box, and then descends into the powder box to pick up insulating powder after heating, and then the heating and powder sticking are repeated many times to form an encapsulation layer on the electronic device. However, the heating box in the existing encapsulation machine heats the electronic device by radiation through the heating element (such as a heating rod), and the heating uniformity of the electronic device is poor, which will cause the thickness of the insulating powder picked up by various parts of the electronic device to be uneven, affecting the encapsulation accuracy of the electronic device. Summary of the invention

[0004] The object of the present invention is to provide a high-precision powder packaging machine to solve the above-mentioned defects of the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A high-precision powder packaging machine comprises a lifting rack, a heating box and a powder box which are arranged in sequence from top to bottom. The heating box comprises a box body and a circulating fan installed on the box body. A heating channel for electronic devices to pass through is provided at the center of the box body, and a cavity is provided between the inner wall and the outer wall of the box body. A heating element is provided in the cavity. An air inlet is provided at one end of the inner wall of the box body, and an air outlet is provided at the other end of the inner wall of the box body. The circulating fan sucks the airflow in the heating channel into the cavity from the air inlet, and discharges it into the heating channel from the air outlet to form circulating hot air in the heating channel.

[0007] Optionally, at least one pair of the air inlets and the air outlets are provided, and each pair of the air inlets and each pair of the air outlets are located on two opposite sides of the box body, and a circulating fan is provided at each air inlet.

[0008] Optionally, an air guide cover is provided at the air inlet to guide the air flow of the heating channel into the air suction port of the circulation fan.

[0009] Optionally, both the upper and lower ends of the heating channel are provided with opening and closing doors.

[0010] Optionally, the lifting rack comprises a rack body, a lifting guide rail, a lifting guide rod and a driving mechanism, the rack body is used to load electronic devices and can be hung on the lifting guide rail in a lateral movable manner, the lifting guide rod is fixedly connected to the lifting guide rail, and the driving mechanism is connected to the lifting guide rod to drive it to move up and down;

[0011] A front rail is fixedly provided at one end of the lifting rail for hanging the slidable hanger body. When the lifting rail rises to the limit position, it is at the same height as the front rail, so that the hanger body on the front rail can be slid onto the lifting rail.

[0012] Optionally, a temporary storage rail is fixedly provided at the other end of the lifting guide rail for temporarily storing the hanger body sliding over the lifting guide rail.

[0013] Optionally, barb parts are provided on both sides of the hanger body, and the two barb parts and the top of the hanger body form a slide groove, and the lifting guide rail, the front guide rail and the temporary storage guide rail can all cooperate with the slide groove.

[0014] Optionally, the barb portion is installed with a spring plunger, and the lifting guide rail, the front guide rail and the temporary storage guide rail are all provided with a limiting groove that can cooperate with the spring plunger to achieve the limitation of the hanger body.

[0015] Optionally, a limiting member for limiting the rising height thereof is provided above the lifting guide rail.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: In the present invention, the heating box is modified on the basis of the existing technology, and the airflow in the heating channel is sucked into the cavity of the heating box from the air inlet through a circulating fan, and discharged into the heating channel from the air outlet, thereby forming circulating hot air in the heating channel, that is, forming a dynamic heating environment, improving the uniformity of heating of electronic devices, and then improving the consistency of the thickness of the insulating powder adhered to various parts of the electronic devices, and improving the encapsulation accuracy of the electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a high-precision powder packaging machine provided by the present invention;

[0018] Figure 2 for Figure 1 A in the enlarged view;

[0019] Figure 3 for Figure 2 Partial cross-sectional view of BB in;

[0020] Figure 4 for Figure 2 Partial cross-sectional view of CC in;

[0021] Figure markings: 1-frame, 2-lifting rack, 201-rack body, 2011-hook part, 202-lifting guide rail, 203-lifting guide rod, 3-heating box, 301-box body, 3011-heating channel, 3012-cavity, 3013-air inlet, 3014-air outlet, 302-circulating fan, 4-powder box, 5-opening and closing door, 6-front guide rail, 7-temporary storage guide rail, 8-spring plunger, 9-limiting member, 10-mounting seat, 11-top plate. DETAILED DESCRIPTION

[0022] A high-precision powder packaging machine includes a lifting rack 2, a heating box 3 and a powder box 4 which are arranged in sequence from top to bottom. Those skilled in the art should know that in actual applications, the lifting rack 2, the heating box 3 and the powder box 4 are all installed on a frame 1, and the powder box 4 fluidizes the powder through a fluidized bed. When working, the lifting rack 2 carries the electronic device down, and the electronic device is first heated in the heating box 3, and then descends into the powder box 4 to pick up insulating powder, and then the heating and powder sticking are repeated multiple times to form an encapsulation layer on the electronic device.

[0023] refer to Figure 1 and Figure 2 The present invention improves the heating box 3 on the basis of the above-mentioned prior art. Specifically, the heating box 3 includes a box body 301 and a circulating fan 302 (the circulating fan 302 is preferably a centrifugal fan) installed on the box body 301. The box body 301 is fixedly installed on the frame 1. The center of the box body 301 has a heating channel 3011 for the electronic device to pass through. A cavity 3012 is provided between the inner wall and the outer wall of the box body 301. A heating element (not shown in the figure, such as a heating rod, an electric heating wire, etc.) is provided in the cavity 3012. The inner wall of the box body 301 is provided with a heating element. An air inlet 3013 is provided at one end, and an air outlet 3014 is provided at the other end of the inner wall of the box body 301. The air flow in the heating channel 3011 is sucked into the cavity 3012 of the heating box 3 from the air inlet 3013 through the circulating fan 302, and is discharged into the heating channel 3011 from the air outlet 3014, thereby forming circulating hot air in the heating channel 3011, that is, forming a dynamic heating environment, thereby improving the heating uniformity of the electronic device, thereby improving the consistency of the thickness of the insulating powder adhered to various parts of the electronic device, and improving the encapsulation accuracy of the electronic device.

[0024] On the basis of the above, an air guide cover (not shown) is provided at the air inlet 3013 to guide the airflow of the heating channel 3011 into the air intake of the circulation fan 302. It is easy to understand that the circulation fan 302 only inhales the airflow from the heating channel 3011 and avoids inhaling the airflow in the cavity 3012.

[0025] At least one pair of air inlets 3013 and air outlets 3014 are provided, and each pair of air inlets 3013 and each pair of air outlets 3014 are located at two opposite sides of the box body 301, and a circulation fan 302 is provided at each air inlet 3013, so that the circulation effect of the air flow is ensured. In this embodiment, each pair of air inlets 3013 and air outlets 3014 are provided, and of course, multiple pairs can be provided in other embodiments.

[0026] On the basis of the above, this embodiment is provided with an opening and closing door 5 at the upper and lower ends of the heating channel 3011. In actual application, the opening and closing door 5 can be opened and closed automatically. The specific implementation method can be conventional. For example, the opening and closing door 5 can be automatically opened and closed by a linear motor in conjunction with a controller.

[0027] It is worth noting that in the existing powder encapsulation machine, after a batch of electronic devices are loaded and encapsulated by the lifting rack 2, it is necessary to manually take out all the electronic devices one by one and then add other electronic devices to be encapsulated, which is time-consuming and affects the encapsulation efficiency. To this end, the present invention also makes the following improvements.

[0028] refer to Figure 2-Figure 4 The lifting rack 2 includes a rack body 201, a lifting rail 202, a lifting guide rod 203 and a driving mechanism. The rack body 201 is used to load electronic devices and can be hung on the lifting rail 202 in a lateral manner. The lifting guide rod 203 is fixedly connected to the lifting rail 202. The driving mechanism is connected to the lifting guide rod 203 to drive it to move up and down. The specific form of the driving mechanism is not limited, and the conventional setting in this field can be adopted, such as a conventional screw lifting mechanism. In actual application, a top plate 11 is set on the top of the rack 1, and a mounting seat 10 is set on the top of the top plate 11. The driving mechanism is installed on the mounting seat 10.

[0029] One end of the lifting rail 202 is provided with a front rail 6 for hanging a slidable rack body 201. The front rail 6 is fixedly connected to the top plate 11. When the lifting rail 202 rises to the limit position, it is at the same height as the front rail 6, so that the rack body 201 on the front rail 6 can be slid onto the lifting rail 202. In this way, the subsequent electronic devices to be encapsulated can be hung on the front rail 6 through the rack body 201. After a batch of electronic devices are encapsulated, the rack body 201 is connected and taken away together, and then the rack body 201 loaded with electronic devices on the front rail 6 is slid onto the lifting rail 202, which is convenient for realizing the rapid addition of electronic devices, improving the continuity of the process, and then improving the encapsulation efficiency. On this basis, it should be understood that the lifting rail 202 and the rack body 201 can rise to the top of the heating box 3, so as to realize the lateral sliding and removal of the rack body 201.

[0030] The other end of the lifting guide rail 202 of this embodiment is provided with a temporary storage guide rail 7, which is also fixedly connected to the top plate 11, and is used to temporarily store the hanger body 201 that slides over the lifting guide rail 202. It is worth noting that the temporary storage guide rail 7 is provided to facilitate the temporary storage of the encapsulated electronic devices, making the operation more convenient. On this basis, it is easy to understand that the temporary storage guide rail 7 is at the same height as the front guide rail 6 and the lifting guide rail 202 that has risen to the limit position. Furthermore, a limiter 9 for limiting its rising height is provided above the lifting guide rail 202 of this embodiment, and the limiter 9 is fixedly provided on the top plate 11.

[0031] As an option, the matching mode of the rack body 201 and the lifting rail 202, the front rail 6 and the temporary storage rail 7 in this embodiment is as follows: the two sides of the rack body 201 are provided with barbs 2011, and the two barbs 2011 form a slide groove with the top of the rack body 201, and the lifting rail 202, the front rail 6 and the temporary storage rail 7 can all match with the slide groove. In other embodiments, of course, other matching modes can also be adopted, such as by providing a dovetail groove in one and a dovetail block matching with the dovetail groove in the other.

[0032] On the basis of the above, the hook part 2011 is equipped with a spring plunger 8, and the lifting rail 202, the front rail 6 and the temporary storage rail 7 are all provided with a limit groove that can cooperate with the spring plunger 8 to achieve the limit of the rack body 201. It is worth noting that the spring plunger 8 can prevent the rack body 201 from sliding easily on each rail due to some factors (such as vibration), and it does not affect the application of thrust to make the rack body 201 slide normally during use. In this way, it can ensure that the rack body 201 can be lifted and lowered normally in the heating channel 3011, and it can also prevent the rack body 201 on the front rail 6 and the temporary storage rail 7 from affecting the lifting and lowering of the lifting rail 202.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision powder packaging machine, comprising a lifting rack, a heating box and a powder box arranged in sequence from top to bottom, characterized in that: The heating box includes a box body and a circulating fan installed on the box body. A heating channel for electronic devices to pass through is provided in the center of the box body, and a cavity is provided between the inner wall and the outer wall of the box body. A heating element is provided in the cavity. An air inlet is provided at one end of the inner wall of the box body, and an air outlet is provided at the other end of the inner wall of the box body. The circulating fan sucks the airflow in the heating channel into the cavity from the air inlet, and discharges it into the heating channel from the air outlet to form circulating hot air in the heating channel.

2. The high-precision powder packaging machine according to claim 1, characterized in that: At least one pair of the air inlets and the air outlets are provided, and each pair of the air inlets and each pair of the air outlets are located at two opposite sides of the box body, and a circulating fan is provided corresponding to each air inlet.

3. The high-precision powder packaging machine according to claim 1, characterized in that: An air guide cover is arranged at the air inlet for guiding the airflow of the heating channel into the air suction port of the circulation fan.

4. The high-precision powder packaging machine according to claim 1, characterized in that: The upper end and the lower end of the heating channel are both provided with opening and closing doors.

5. The high-precision powder packaging machine according to claim 1, characterized in that: The lifting rack comprises a rack body, a lifting guide rail, a lifting guide rod and a driving mechanism. The rack body is used to load electronic devices and can be hung on the lifting guide rail in a lateral movable manner. The lifting guide rod is fixedly connected to the lifting guide rail. The driving mechanism is connected to the lifting guide rod to drive it to move up and down. A front rail is fixedly provided at one end of the lifting rail for hanging the slidable hanger body. When the lifting rail rises to the limit position, it is at the same height as the front rail, so that the hanger body on the front rail can be slid onto the lifting rail.

6. The high-precision powder packaging machine according to claim 5, characterized in that: A temporary storage rail is fixedly arranged at the other end of the lifting guide rail for temporarily storing the hanger body that slides over the lifting guide rail.

7. The high-precision powder packaging machine according to claim 6, characterized in that: The two sides of the hanger body are provided with hook parts, and the two hook parts and the top of the hanger body form a slide groove, and the lifting guide rail, the front guide rail and the temporary storage guide rail can all cooperate with the slide groove.

8. The high-precision powder packaging machine according to claim 7, characterized in that: The barb portion is equipped with a spring plunger, and the lifting guide rail, the front guide rail and the temporary storage guide rail are all provided with a limiting groove that can cooperate with the spring plunger to achieve the limiting of the hanger body.

9. The high-precision powder packaging machine according to any one of claims 5 to 8, characterized in that: A limiting member for limiting the rising height thereof is arranged above the lifting guide rail.

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