MLCC product drying device

Abstract

The MLCC product drying device comprises a drying furnace, a heater, a dehydration cage and a vacuum pump, and the drying furnace is provided with an air inlet hole and an exhaust hole in the bottom; the heater is arranged on the outer side of the drying furnace and used for heating gas entering the drying furnace through the gas inlet hole; the dewatering cage is provided with an open top and a bottom plate provided with a plurality of vent holes; the dewatering cage can be placed at the bottom of the drying furnace and covers the exhaust holes, so that the vent holes are communicated with the exhaust holes; the size of the cross section of the inner cavity of the dehydration cage is gradually reduced in the direction towards the bottom plate at the position close to the bottom plate; and the vacuum pump is communicated with the exhaust hole through the exhaust channel so as to vacuumize the interior of the drying furnace. According to the MLCC product drying device, through cooperation of high-temperature hot air and negative-pressure air exhaust, the water evaporation and removal process is accelerated, the MLCC product can be rapidly dried, and the drying efficiency is improved; and the dehydration cage further adopts a structure with the bottom gradually shrunk, so that the efficiency of the airflow passing through the MLCC product is improved, and the drying process is more thorough.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of MLCC post-plating drying treatment, in particular to a MLCC product drying device. BACKGROUND

[0002] With the rapid development of electronic information technology, as one of the three electronic components, multi-layer ceramic chip capacitors (MLCC) are constantly developing towards miniaturization, high capacitance, high frequency, etc. MLCC is formed by stacking inner electrodes arranged in a staggered manner between left and right, sintering at high temperature to form a ceramic chip, and then sealing metal outer electrodes on both ends of the chip to form a structure similar to a monolith.

[0003] In the production process of MLCC, the MLCC product after plating needs to be washed, dried and other operations. The drying operation usually adopts hot drying, vacuum (negative pressure) drying, or a combination of vacuum (negative pressure) and hot drying. The vacuum (negative pressure) and hot drying combined drying furnace is simply called vacuum hot drying furnace. This equipment is widely used because of its fast drying speed and high efficiency. However, the traditional vacuum hot drying furnace applied to MLCC has a complex structure, and the drying efficiency still needs to be improved. CONTENT OF THE INVENTION

[0004] Therefore, the present application provides a MLCC product drying device which can solve the above technical problems.

[0005] The above-mentioned purpose of the present application is achieved by the following technical solution: the present application provides a MLCC product drying device, which comprises:

[0006] a drying furnace provided with an air inlet hole and an air outlet hole at the bottom;

[0007] a heater arranged outside the drying furnace and used for heating the gas entering the drying furnace through the air inlet hole;

[0008] a dehydration cage having an open top and a bottom plate provided with a plurality of air holes; the dehydration cage can be placed on the bottom of the drying furnace and covers the air outlet hole, so that the air holes and the air outlet hole are in communication; the inner cavity of the dehydration cage gradually decreases in cross-sectional size along the direction towards the bottom plate at the position close to the bottom plate;

[0009] a vacuum pump in communication with the air outlet hole through an air suction channel to perform vacuum suction on the inside of the drying furnace.

[0010] In an exemplary embodiment, the cross section of the inner cavity of the dehydration cage is circular; the cross section of the inner cavity of the dehydration cage gradually decreases in diameter from the bottom to the top.

[0011] In an exemplary embodiment, the radius of the cross section of the inner cavity of the dehydration cage gradually decreases to half size from the middle of the dehydration cage to the bottom.

[0012] In an exemplary embodiment, the exhaust holes include a plurality of corresponding exhaust holes, and the dehydration cage is arranged above the corresponding exhaust holes.

[0013] In an exemplary embodiment, the air suction channel includes a gas collecting cover arranged below the drying oven; the top of the gas collecting cover is in communication with a plurality of exhaust holes, and the bottom of the gas collecting cover is in communication with the vacuum pump; the inner cavity of the gas collecting cover gradually decreases from top to bottom.

[0014] In an exemplary embodiment, the gas collecting cover is in an inverted conical structure, and the diameter of the top is greater than that of the bottom.

[0015] In an exemplary embodiment, the bottom of the drying oven is provided with a plurality of slots, each of the exhaust holes is arranged in a corresponding slot, and the dehydration cage is placed on the slot and covers the exhaust hole.

[0016] In an exemplary embodiment, a sealing pad is arranged on each of the slots, and the dehydration cage is placed on the sealing pad; the sealing pad is provided with a gap in communication with the exhaust hole and the air hole.

[0017] In an exemplary embodiment, the air inlet hole includes two air inlet holes arranged opposite to each other on the upper part of the side wall of the drying oven; and the heater includes two corresponding heaters.

[0018] In an exemplary embodiment, a handle is arranged on the dehydration cage.

[0019] The present application has the following beneficial effects:

[0020] The MLCC product drying device of the embodiment of the present application accelerates the moisture evaporation and removal process through the cooperation of high-temperature hot gas and negative pressure air extraction, so that the MLCC product can be quickly dried, and the drying efficiency is improved; since the dehydration cage covers the exhaust hole, the high-temperature hot gas must pass through the air hole at the bottom of the dehydration cage to enter the exhaust hole, thereby improving the efficiency of the airflow passing through the MLCC product and making the drying process more thorough; since the air hole at the bottom of the dehydration cage is provided with multiple air holes, the airflow can uniformly pass through the MLCC product, improving the drying uniformity and avoiding the problems of local overheating or uneven drying; the dehydration cage further adopts a structure of gradually narrowing bottom, so that the filter cloth wrapping the MLCC product can completely cover the airflow channel and the air hole at the bottom of the dehydration cage. Thus, more high-temperature airflow passes through the area where the MLCC product is located, without additional obstacles, preventing the hot airflow from being wasted through the air hole not covered by the product due to the small amount of MLCC product to be dried, so that more airflow effectively acts on the surface of the MLCC product, improving the moisture evaporation rate, thereby shortening the overall drying time and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic diagram of an MLCC product drying device in an exemplary embodiment;

[0022] Figure 2 FIG. 4 is a schematic diagram of the use process of a dehydration cage in an exemplary embodiment;

[0023] Figure 3 FIG. 1 is a structural schematic diagram of an MLCC product drying device in an exemplary embodiment;

[0024] Figure 4 FIG. 5 is a structural schematic diagram of a dehydration cage in an exemplary embodiment.

[0025] BRIEF DESCRIPTION OF DRAWINGS:

[0026] 10, drying furnace; 11, air inlet hole; 20, heater; 30, dehydration cage; 31, bottom plate; 311, air hole; 32, handle; 40, vacuum pump; 50, air collecting cover; 60, filter cloth. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of the present application, it needs to be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature or the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] For the technical problems in the background art, the present application provides an MLCC product drying device, which can perform drying operation on MLCC products and accompanying plated products (such as steel balls) after plating, so as to facilitate subsequent sorting.

[0033] AsFigures 1-4 As shown in the figure, in an embodiment, the MLCC product drying device comprises a drying furnace 10, a heater 20, a dehydration cage 30 and a vacuum pump 40. The drying furnace 10 is used as a drying container, the bottom of which is provided with an exhaust hole (not shown), and the sidewall of which is provided with an air inlet hole 11. In some embodiments, the air inlet hole 11 can also be provided at the top of the drying furnace 10.

[0034] The heater 20 is arranged outside the air inlet hole 11 and is used to heat the gas entering the drying furnace 10 from the air inlet hole 11. In a specific embodiment, the heater 20 can be arranged adjacent to the air inlet hole 11, so that when the gas flow enters the air inlet hole 11, it will pass through the heater 20 and be heated. In a preferred embodiment, a heating channel can also be arranged outside the air inlet hole 11, and the heater 20 is arranged in the heating channel. The gas flow is heated in the heating channel and then enters the drying furnace 10 from the air inlet hole 11. Specifically, the heater 20 can be composed of heating wires.

[0035] The dehydration cage 30 is used to be placed in the drying furnace 10 after loading the MLCC products and the accompanying plated products to be dried, and covers the exhaust hole at the bottom of the drying furnace 10. The top of the dehydration cage 30 forms an opening for loading the MLCC products and the accompanying plated products, and the bottom of the dehydration cage includes a bottom plate 31, which is provided with a plurality of air holes 311. When the dehydration cage 30 is placed at the bottom of the drying furnace 10, the bottom plate 31 covers the exhaust hole, and the air holes 311 are in communication with the exhaust hole. The vacuum pump 40 is in communication with the exhaust hole through an exhaust channel, so as to form a high-temperature hot gas flow channel between the air inlet hole 11, the opening at the top of the dehydration cage 30, the inner cavity of the dehydration cage 30, the air holes 311 and the exhaust hole, and the MLCC products and the accompanying plated products to be heated are located in the gas flow channel.

[0036] In order to avoid the situation that when the number of MLCC products is small, the inner cavity of the dehydration cage 30 and the air holes 311 provided on the bottom plate 31 cannot be completely covered, so that the high-temperature hot gas flow is accelerated and drawn away from the air holes 311 that are not covered, in the present embodiment, the cross-sectional dimension of the inner cavity of the dehydration cage 30 gradually decreases in the direction towards the bottom plate 31. In the present embodiment, the dehydration cage 30 adopts a structure with a gradually shrinking bottom, so that the filter cloth 60 wrapping the MLCC products can completely cover the gas flow channel, thereby completely covering the air holes 311 at the bottom of the dehydration cage 30.

[0037] The working process of the MLCC product drying device of the present embodiment is as follows:

[0038] After the MLCC product and the plating accompanying product (for example, a steel ball) after electroplating are wrapped with filter cloth 60 and placed in the dehydration cage 30, the drying oven 10 is opened, the dehydration cage 30 is placed in the drying oven 10, and the bottom plate 31 of the dehydration cage 30 covers the exhaust hole arranged at the bottom of the drying oven 10, and the drying oven 10 is closed. The heater 20 and the vacuum pump 40 are turned on, and the vacuum pump 40 continuously extracts air from the exhaust hole and the air hole 311 through the air extraction channel, so that a negative pressure is formed in the drying oven 10 and the dehydration cage 30 therein. The high-temperature hot gas heated by the heater 20 enters the inside of the drying oven 10 from the air inlet hole 11. Since the dehydration cage 30 covers the exhaust hole at the bottom of the drying oven 10, the gas can only enter the exhaust hole through the air hole 311 at the bottom of the dehydration cage 30 and then be extracted by the vacuum pump 40. This process promotes the continuous flow of high-temperature hot gas through the surface of the MLCC product and the plating accompanying product, accelerates the removal of moisture, and improves the drying efficiency.

[0039] The MLCC product drying device of the embodiment of the present application cooperates the high-temperature hot gas with the negative pressure air extraction to accelerate the moisture evaporation and removal process, so that the MLCC product can be quickly dried and the drying efficiency is improved. Since the dehydration cage covers the exhaust hole, the high-temperature hot gas must pass through the air hole at the bottom of the dehydration cage to enter the exhaust hole, thereby improving the efficiency of the airflow passing through the MLCC product and making the drying process more thorough. Since the air hole at the bottom of the dehydration cage is arranged in multiple, the airflow can uniformly pass through the MLCC product, improving the drying uniformity and avoiding the problems of local overheating or uneven drying. The dehydration cage further adopts a structure of gradually shrinking at the bottom, so that the filter cloth wrapped around the MLCC product can completely cover the airflow channel and the air hole at the bottom of the dehydration cage. Therefore, more high-temperature airflow passes through the area where the MLCC product is located, without additional obstacles, preventing the hot gas flow from being wasted through the air hole not covered by the product due to the small amount of MLCC product to be dried, so that more airflow effectively acts on the surface of the MLCC product, improves the moisture evaporation rate, and thus shortens the overall drying time and improves the production efficiency.

[0040] In a preferred embodiment, as shown in Figures 1-4 , the cross section of the inner cavity of the dehydration cage 30 is circular. Correspondingly, the dehydration cage 30 is cylindrical, and the cross section of the outer circumferential surface thereof is also circular.

[0041] In a specific example, as shown in Figure 2 and Figure 4 , from the middle of the dehydration cage 30 towards the bottom plate 31 thereof, the radius of the circular cross section of the inner cavity of the dehydration cage 30 gradually decreases to half the size. That is, from the top opening to the middle of the dehydration cage 30, the inner cavity thereof is cylindrical, and from the middle to the bottom thereof, the inner cavity thereof is inverted conical.

[0042] To further improve the drying efficiency, in an optional embodiment, as shown inFigure 1 and Figure 4 As shown in the drawings, the exhaust holes at the bottom of the drying furnace include four, and the dehydration cage 30 also includes four corresponding ones, and the dehydration cage 30 is arranged above the exhaust holes one by one, so that a plurality of groups of MLCC products can be dried at one time, the single drying batch is improved, and the overall production efficiency is improved.

[0043] In other embodiments, the dehydration cage 30 can also be a plurality of other numbers, and the corresponding exhaust holes also include a corresponding plurality of numbers.

[0044] In order to improve the pumping efficiency of the vacuum pump 40, as shown in the drawings, Figure 1 The exhaust channel includes a gas collecting cover 50, which is arranged below the drying furnace 10. The gas collecting cover 50 is preferably in an inverted conical structure, and the diameter of the top is larger than that of the bottom. The top of the gas collecting cover 50 is in communication with the plurality of exhaust holes, and the bottom is in communication with the vacuum pump. In other embodiments, the gas collecting cover 50 can also be other structures with a gradually decreasing inner cavity from top to bottom.

[0045] In this embodiment, the inverted conical structure of the gas collecting cover 50 can effectively collect the airflow of each exhaust hole, reduce the airflow dispersion loss, improve the smoothness of the gas flow, thereby enhancing the pumping efficiency of the vacuum pump 40, accelerating the moisture removal speed, and further improving the drying efficiency.

[0046] In a preferred embodiment, the bottom of the drying furnace 10 is provided with a plurality of slots (not shown), and each exhaust hole is located in a corresponding slot. The dehydration cage 30 is placed on the slot and covers the exhaust hole, so that the dehydration cage 30 can be taken out more conveniently.

[0047] Preferably, a sealing gasket (not shown) is arranged on each slot, and the dehydration cage 30 is placed on the sealing gasket. The sealing gasket is provided with a notch in communication with the exhaust hole and the air hole 311.

[0048] In this embodiment, a plurality of slots are arranged at the bottom of the drying furnace, so that the dehydration cage 30 can be accurately placed at the specified position, and the operator can quickly put in or take out the dehydration cage, thereby improving the convenience of using the equipment.

[0049] The arrangement of the sealing gasket can reduce the gap between the dehydration cage 30 and the bottom of the drying furnace, prevent air leakage, ensure more efficient pumping, and improve the drying efficiency.

[0050] In a specific embodiment, as shown in the drawings, Figure 1 The air inlet hole 11 includes two and is arranged on the upper sides of the side walls of the drying furnace 10. Correspondingly, the heater 20 also includes two corresponding ones.

[0051] In order to facilitate the taking of the dehydration cage, as shown in the drawings, Figure 2 and Figure 4As shown, the dehydration cage 30 is provided with a handle 32.

[0052] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not result in contradictions, it should be considered within the scope of the present disclosure.

[0053] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims, and the description can be used to explain the content of the claims.

Claims

1. An MLCC product baking apparatus, characterized by, It comprises: a drying furnace provided with an air inlet hole and an air outlet hole at the bottom; a heater arranged outside the drying furnace and used for heating the air entering the drying furnace through the air inlet hole; a dehydration cage having an open top and a bottom plate provided with a plurality of air holes; the dehydration cage can be placed on the bottom of the drying furnace and covers the air outlet hole, so that the air holes are in communication with the air outlet hole; the inner cavity of the dehydration cage gradually decreases in size along the direction towards the bottom plate near the bottom plate; a vacuum pump in communication with the air outlet hole through an air suction channel to perform vacuumization on the inside of the drying furnace.

2. The MLCC product drying device according to claim 1, wherein: the cross section of the inner cavity of the dehydration cage is circular; the cross section of the inner cavity of the dehydration cage gradually decreases downwards near the bottom plate, and the centers of the cross sections at any position of the dehydration cage are located on the same axis.

3. The MLCC product drying device according to claim 2, wherein: from the middle of the dehydration cage towards the bottom plate, the radius of the cross section of the inner cavity of the dehydration cage gradually decreases to half the size.

4. The MLCC product drying device according to any one of claims 1-3, wherein: the air outlet hole comprises a plurality of air outlet holes, the dehydration cage comprises a plurality of corresponding dehydration cages, and the dehydration cages can be placed above the corresponding air outlet holes.

5. The MLCC product drying device according to claim 4, wherein: the air suction channel comprises a gas collection cover arranged below the drying furnace; the top of the gas collection cover is in communication with the plurality of air outlet holes, the bottom is in communication with the vacuum pump, and the inner cavity of the gas collection cover gradually decreases from top to bottom.

6. The MLCC product drying device according to claim 5, wherein: the gas collection cover has an inverted conical structure with a larger top diameter than a bottom diameter.

7. The MLCC product drying device according to claim 5, wherein: the bottom of the drying furnace is provided with a plurality of slots, each of the air outlet holes is located in a corresponding slot, and the dehydration cage is placed on the slot and covers the air outlet hole.

8. The MLCC product drying device according to claim 7, wherein: a sealing gasket is arranged on each of the slots, and the dehydration cage is placed on the sealing gasket; the sealing gasket is provided with a notch in communication with the air outlet hole and the air hole.

9. The MLCC product drying device according to claim 1, wherein: the air inlet hole comprises two air inlet holes arranged opposite to each other on the upper part of the side wall of the drying furnace; and the heater comprises two corresponding heaters.

10. The MLCC product drying device according to claim 1, wherein: a handle is arranged on the dehydration cage.

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