Liquid encapsulation apparatus and liquid encapsulation method

Abstract

The application discloses a liquid encapsulation device and a liquid encapsulation method. The liquid encapsulation device comprises an encapsulation mechanism, a stirring mechanism and a liquid receiving groove. The liquid receiving groove comprises a large groove and an encapsulation groove. The encapsulation groove is assembled in the large groove in a lifting manner. The encapsulation groove is switched between a feeding position of being immersed in the large groove and a working position of being separated from the large groove. The encapsulation mechanism and the stirring mechanism are movably assembled on the periphery of the liquid receiving groove and correspond to the encapsulation groove of the liquid receiving groove in sequence. The encapsulation groove is lifted from the large groove, and the excess encapsulation liquid is overflowed from the encapsulation groove. The liquid level of the encapsulation liquid is uniform, which is beneficial to the encapsulation operation. The encapsulation mechanism and the stirring mechanism are arranged on the periphery of the liquid receiving groove. The problems of the sealing ring of the stirring mechanism, such as heating, abrasion and sealing failure, do not affect the encapsulation liquid in the liquid receiving groove. The heating volatilization of the encapsulation liquid is avoided. The debris after the abrasion of the sealing ring is prevented from being mixed into the encapsulation liquid. The quality of the encapsulation product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of encapsulation, in particular to a liquid encapsulation device and a liquid encapsulation method. BACKGROUND

[0002] The surface layer of the current market thermistor, piezoresistor and force-sensitive resistor and other components has a resin protective layer, such as silicone resin, phenolic resin and epoxy resin, and has the characteristics of preventing leakage, preventing dust, preventing corrosion and preventing aging, etc. The resin protective layer of the component is encapsulated by a liquid encapsulation process, that is, a dip coating method is used to apply thermosetting resin on the component, and the outer surface is fully coated as a protective layer.

[0003] Chinese utility model patent CN207103026U discloses an encapsulation device for safety components, an overflow groove is arranged on the outer side of the encapsulation groove, the encapsulation groove is supplemented with encapsulation liquid by a pump, and the excess encapsulation liquid in the encapsulation groove overflows back to the overflow groove, that is, the material is supplemented. In production, the liquid level disturbance of the supplementing material affects the instability of the product encapsulation size. Moreover, the stirrer assembled at the bottom of the encapsulation groove rotates in the encapsulation liquid, and cannot break the solidified skin layer on the surface of the encapsulation liquid. When the solidification time is prolonged, the solidified skin layer becomes thicker, which affects the product encapsulation quality. At the same time, continuous friction and heating occur between the stirring shaft and the matching sealing ring, which accelerates the volatilization of the encapsulation liquid. At the same time, the debris generated by the wear of the sealing ring mixes into the encapsulation liquid, which affects the encapsulation quality. In addition, after the sealing ring is worn, the sealing is invalid, which causes great difficulty in maintenance and repair and long time consumption. SUMMARY

[0004] Therefore, the present application provides a liquid encapsulation device and a liquid encapsulation method to solve the above problems, which can avoid the adverse effects on the quality of encapsulated products in the production processes such as supplementing the encapsulation groove with the encapsulation groove in the large groove and stirring the encapsulation liquid.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows:

[0006] A liquid encapsulation device, comprising an encapsulation mechanism, a stirring mechanism and a liquid receiving tank, the liquid receiving tank comprising a large tank and an encapsulation tank, the encapsulation tank being liftable and assembled in the large tank, so that the encapsulation tank is switched between the position of supplementing the encapsulation groove with the encapsulation groove immersed in the large tank and the working position after leaving the large tank, and the encapsulation mechanism and the stirring mechanism are movably assembled on the periphery of the liquid receiving tank to correspond to the encapsulation tank of the liquid receiving tank in sequence.

[0007] Further, a lifting mechanism is arranged on the periphery of the large tank, the encapsulation tank is fixedly assembled on the lifting mechanism, and the lifting mechanism drives the encapsulation tank to switch between the position of supplementing the encapsulation groove with the encapsulation groove immersed in the large tank and the working position after leaving the large tank.

[0008] Further, the large tank is further provided with a scraper and a scraper cylinder, the scraper is located in the large tank, and the scraper cylinder is fixedly arranged on the periphery of the large tank and is drivingly connected with the scraper to drive the scraper to move back and forth in the large tank.

[0009] Further, the scraper is provided with a convex catch formed by an end face protrusion and a flow guide channel capable of guiding liquid flow, and when the convex catch passes through the liquid surface of the encapsulating liquid, the convex catch breaks the solidified skin layer formed by solidification of the liquid surface.

[0010] Further, the encapsulating device further comprises a transfer mechanism, and the stirring mechanism and the encapsulating mechanism are arranged on the transfer mechanism and are driven by the transfer mechanism to correspond to the liquid receiving grooves and the encapsulating grooves in sequence.

[0011] Further, the number of the encapsulating mechanisms and the corresponding liquid receiving grooves is 2, the number of the stirring mechanism is 1, the stirring mechanism is located between the two encapsulating mechanisms, and the transfer mechanism synchronously drives the stirring mechanism and the two encapsulating mechanisms to move back and forth on a guide rail.

[0012] Further, the stirring mechanism comprises a lifting driver and a stirrer, and the lifting driver is drivingly connected with the stirrer to drive the stirring paddle of the stirrer to extend into or out of the encapsulating groove.

[0013] Further, the stirring mechanism is provided with at least two stirrers with opposite rotation directions.

[0014] Further, the encapsulating mechanism comprises a carrier, a lifting driving assembly and an encapsulating support, the lifting driving assembly is arranged on the encapsulating support and is drivingly connected with the carrier to drive the carrier to extend into or out of the encapsulating groove.

[0015] The application further provides a liquid encapsulating method, comprising the following steps: S1, providing the liquid encapsulating device, placing the product on the encapsulating mechanism, and injecting the encapsulating liquid into the liquid receiving groove to cover the encapsulating groove at the feeding position; S2, driving the stirring mechanism to correspond to the encapsulating groove at the feeding position and extend into the encapsulating groove to stir, and then extending out of the encapsulating groove after the stirring is completed; S3, lifting the encapsulating groove to the working position, driving the encapsulating mechanism to correspond to the encapsulating groove at the working position and immerse the product on the encapsulating mechanism into the encapsulating liquid in the encapsulating groove; and S4, driving the encapsulating mechanism to separate the product from the encapsulating groove after the immersion is completed, and lowering the encapsulating groove to the feeding position.

[0016] The technical scheme provided by the application has the following beneficial effects:

[0017] The liquid receiving groove is composed of a large groove and an encapsulating groove, and the excess encapsulating liquid is overflowed from the encapsulating groove by lifting the encapsulating groove from the large groove, so as to ensure the uniform liquid level of the encapsulating liquid, facilitate the encapsulating operation, and the sealing ring of the stirring mechanism will not affect the encapsulating liquid in the liquid receiving groove, avoid the heating and volatilization of the encapsulating liquid, and avoid the impurities such as debris mixed into the encapsulating liquid after the sealing ring is worn, thereby improving the quality of the encapsulated product. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Fig. 1 is a structural schematic diagram of a liquid encapsulating device in an embodiment.

[0019] Fig. 2 Fig. 2 is a structural schematic diagram of a scraper in an embodiment. DETAILED DESCRIPTION

[0020] To further illustrate the embodiments, the present application provides accompanying drawings. These drawings are part of the disclosure of the present application, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the related description of the specification. Those of ordinary skill in the art should be able to understand other possible implementations and advantages of the present application by referring to these contents. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] The present application will be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] Referring to Figs. 1-2 In the embodiment, a liquid encapsulating device is provided, which comprises an encapsulating mechanism 1, a stirring mechanism 2 and a liquid receiving groove 3. The liquid receiving groove 3 comprises a large groove 31 and an encapsulating groove 32. The encapsulating groove 32 is liftable and assembled in the large groove 31, so that the encapsulating groove 32 is switched between a replenishment position immersed in the large groove 31 and a working position after leaving the large groove 31. The encapsulating mechanism 1 and the stirring mechanism 2 are movably assembled on the periphery of the liquid receiving groove 3 (i.e. including the outer periphery and the upper part of the liquid receiving groove 3), so as to correspond to the encapsulating groove 32 of the liquid receiving groove 3 in sequence.

[0023] The embodiment also provides a liquid encapsulation method (i.e. an encapsulation method based on the above-mentioned liquid encapsulation device), which comprises the following steps: S1, providing the above-mentioned liquid encapsulation device, placing a product on the encapsulation mechanism 1, and injecting the encapsulation liquid into the liquid receiving groove 3 until the encapsulation groove 32 at the feeding position is covered; S2, driving the stirring mechanism 2 to correspond to the encapsulation groove 32 at the feeding position and extending into the encapsulation groove 32 to stir, and then withdrawing from the encapsulation groove 32 after the stirring is completed; S3, lifting the encapsulation groove 32 to the working position, and driving the encapsulation mechanism 1 to correspond to the encapsulation groove 32 at the working position and immerse the product thereon into the encapsulation liquid in the encapsulation groove 32; and S4, driving the encapsulation mechanism 1 to separate the product from the encapsulation groove 32 after the immersion is completed, and lowering the encapsulation groove 32 to the feeding position.

[0024] In this way, the following beneficial effects are achieved:

[0025] 1. The liquid receiving groove 3 is composed of the large groove 31 and the encapsulation groove 32, and the excess encapsulation liquid is overflowed from the encapsulation groove 32 by lifting the encapsulation groove 32, so that the liquid level of the encapsulation liquid is uniform, which is beneficial to the encapsulation operation.

[0026] 2. The stirring mechanism 2 and the encapsulation mechanism 1 are arranged at the periphery of the liquid receiving groove 3, and the problems such as heating, wear and sealing failure of the sealing ring of the stirring mechanism 2 do not affect the encapsulation liquid in the liquid receiving groove 3, so that the heating volatilization of the encapsulation liquid is avoided, and the impurities such as the debris after the wear of the sealing ring are prevented from mixing into the encapsulation liquid, thereby improving the quality of the encapsulated product. In addition, the sealing ring can be independently detached for maintenance and repair after the wear and sealing failure.

[0027] In another preferred embodiment, a lifting mechanism 311 is arranged at the periphery of the large groove 31, and the encapsulation groove 32 is fixedly arranged on the lifting mechanism 311. The lifting mechanism 311 drives the encapsulation groove 32 to switch between the feeding position where the encapsulation groove 32 is immersed in the large groove 31 and the working position where the encapsulation groove 32 is separated from the large groove 31. Before the encapsulation product is started, the lifting mechanism 311 drives the encapsulation groove 32 to be immersed in the encapsulation liquid in the large groove 31. After the encapsulation liquid is fed, the lifting mechanism 311 drives the encapsulation groove 32 to be separated from the large groove 31 and lifted to the working position. After the lifting, the excess encapsulation liquid is overflowed from the encapsulation groove 32, so that the liquid level of the encapsulation liquid in the encapsulation groove 32 is uniform every time the encapsulation groove 32 is separated from the large groove 31, which is beneficial to the stability of the encapsulation size of the product. The lifting mechanism 311 is arranged at the periphery of the large groove 31, and does not affect the encapsulation liquid in the large groove 31.

[0028] Of course, in other embodiments, the mechanism of the lifting mechanism 311 is not limited to this, for example, a mechanical hand is arranged at the periphery of the large groove 31 to grab and place the encapsulation groove 32, which can also achieve the movement of the encapsulation groove 32.

[0029] More specifically, the large tank 31 is further provided with a feeding pump assembly (not shown) for injecting the encapsulating liquid into the large tank 31, and when the encapsulating tank 32 is separated from the large tank 31, the feeding of the large tank 31 will not disturb the encapsulating liquid in the encapsulating tank 32, so that the liquid level in the encapsulating tank 32 is in a horizontal state.

[0030] The above-mentioned corresponding lifting mechanism 311 and the encapsulating tank 32 are provided, and when the encapsulating tank 32 is lifted, there is no obstacle in the large tank 31, and thus the large tank 31 is further provided with a scraper 312 and a scraper cylinder 313, the scraper 312 is located in the large tank 31, and the scraper cylinder 313 is fixedly assembled on the periphery of the large tank 31 and is drivingly connected to the scraper 312 to drive the scraper 312 to move back and forth in the large tank 31, and when the encapsulating tank 32 is lifted from the large tank 31, the scraper cylinder 313 can drive the scraper 312 to move back and forth in the large tank 31 to scrape off the encapsulating liquid in the large tank 31 and break the solidified skin layer on the surface of the liquid.

[0031] Of course, in other embodiments, the structure of the scraper cylinder 313 is not limited to this, such as using a servo motor instead, which can also drive the scraper 312 to move.

[0032] More specifically, the scraper 312 is provided with a convex catch 3121 formed by protruding one end face and a flow guide channel 3122 capable of guiding the flow of liquid, and when the convex catch 3121 passes through the liquid surface of the encapsulating liquid, the convex catch 3121 breaks the solidified skin layer formed on the liquid surface, and at the same time, the flow guide channel 3122 disturbs the flow sequence of the liquid inside the encapsulating liquid, which is simple in structure and convenient to operate.

[0033] Of course, in other embodiments, the structure of the scraper 312 is not limited to this, and will not be described in detail here.

[0034] In another preferred embodiment, the encapsulating device further comprises a transfer mechanism 4, and the stirring mechanism 2 and the encapsulating mechanism 1 are assembled on the transfer mechanism 4 and are driven by the transfer mechanism 4 to correspond to the encapsulating tank 32 of the liquid receiving tank 3 in sequence, and the transfer mechanism 4 drives the stirring mechanism 2 and the encapsulating mechanism 1 to move to the corresponding stations provided in the encapsulating device, which is convenient to operate.

[0035] More specifically, the transfer mechanism 4 is located above the liquid receiving tank 3, and the stirring mechanism 2 and the encapsulating mechanism 1 are also located above the liquid receiving tank 3, so that the space above the liquid receiving tank 3 can be fully utilized to reduce the floor area. Of course, in other embodiments, the transfer mechanism 4 can also be provided at the periphery (such as the front side, rear side, left side or right side) of the liquid receiving tank 3.

[0036] In the specific embodiment, the transfer mechanism 4 is provided with parallel arranged guide rails 42 and gear rails 43, and further comprises a transfer motor 41, the stirring mechanism 2 and the encapsulation mechanism 1 are each provided with a guide groove (not shown), the guide grooves of the stirring mechanism 2 and the encapsulation mechanism 1 are slidably assembled on the guide rails 42, a gear (not shown) is fixedly assembled on a rotating shaft of the transfer motor 41, the gear is engaged with the gear rails 43, the stirring mechanism 2 and the encapsulation mechanism 1 are fixedly connected through a connecting rod (not shown), and the transfer motor 41 simultaneously drives the stirring mechanism 2 and the encapsulation mechanism 1 to slide on the guide rails 42, so as to realize synchronous driving.

[0037] In particular, the number of the encapsulation mechanisms 1 and the corresponding liquid receiving grooves 3 is each set to be 2, the number of the stirring mechanism 2 is set to be 1, the stirring mechanism 2 is located between the two encapsulation mechanisms 1, the stirring mechanism 2 and the two encapsulation mechanisms 1 are fixedly connected through the same connecting rod, the transfer mechanism 4 synchronously drives the stirring mechanism 2 and the two encapsulation mechanisms 1 to move back and forth on a guide rail, the positions of the two liquid receiving grooves 3 are fixed, the transfer mechanism 4 synchronously drives the stirring mechanism 2 and the encapsulation mechanisms 1, so that they are periodically switched between the working periods of one stirring mechanism 2 corresponding to one liquid receiving groove 3 and one encapsulation mechanism 1 corresponding to another liquid receiving groove 3, and the operation is convenient. That is, when the transfer mechanism 4 drives the stirring mechanism 2 and the encapsulation mechanisms 1 to move one station to the left, the left liquid receiving groove 3 corresponds to the stirring mechanism 2, and the right liquid receiving groove 3 corresponds to the right encapsulation mechanism 1, when the transfer mechanism 4 drives the stirring mechanism 2 and the encapsulation mechanisms 1 to move one station to the right, the left liquid receiving groove 3 corresponds to the left encapsulation mechanism 1, and the right liquid receiving groove 3 corresponds to the stirring mechanism 2. In this way, the working is completed with the least number of mechanisms.

[0038] Of course, in other embodiments, the number of the encapsulation mechanisms 1, the liquid receiving grooves 3 and the stirring mechanism 2 is not limited to this, and the number of the encapsulation mechanisms 1, the liquid receiving grooves 3 and the stirring mechanism 2 can each be set to be 1, the stirring mechanism 2 and the encapsulation mechanisms 1 are transferred and worked through independent driving mechanisms, and the product encapsulation can also be completed.

[0039] In another preferred embodiment, the stirring mechanism 2 comprises a lifting driver 21 and a stirrer 22, the lifting driver 21 drives and connects the stirrer 22 to drive the stirring paddle of the stirrer 22 to extend into or out of the encapsulation groove 32, and the stirring paddle of the stirrer 22 is driven by the lifting driver 21 to stir in the encapsulation liquid, so as to uniformly mix the encapsulation liquid in the encapsulation groove 32 and break the solidified skin layer of the encapsulation liquid, and the structure is simple and convenient.

[0040] In the specific embodiment, the stirring mechanism 2 is further provided with a diluent feeding mechanism (not shown), which is provided with a peristaltic pump (not shown) for feeding diluent to the encapsulating liquid in the encapsulating tank 32 to solve the problem of viscosity instability caused by continuous evaporation of the encapsulating liquid, so as to ensure that the viscosity of the encapsulating liquid is within the production requirement range, and avoid loose encapsulation, product pinholes, excessive bubbles, and inconsistent encapsulation thickness after coating. The diluent feeding mechanism is arranged on the stirring mechanism 2, so that the diluent can be directly mixed by the stirring mechanism 2 in the first time, the mixing is more uniform, and the effect is better. Of course, in other embodiments, the diluent feeding mechanism can also be arranged on the large tank 31.

[0041] Specifically, the stirring mechanism 2 is provided with at least two stirrers 22 arranged in opposite rotating directions, and each two stirrers 22 arranged in opposite rotating directions form a pair of units. In the specific embodiment, the number of stirrers is set to two pairs of units, i.e. four stirrers 22, which can effectively disrupt the flow order of the encapsulating liquid, break the surface solidified skin of the encapsulating liquid, and prevent the particles in the encapsulating liquid from precipitating.

[0042] Of course, in other embodiments, the number of stirrers 22 is not limited to this, and preferably, the number of stirrers 22 corresponding to forward rotation and reverse rotation is the same.

[0043] In another preferred embodiment, the encapsulation mechanism 1 comprises a carrier 11, a lifting driving assembly 12 and an encapsulation support 13. The carrier 11 is used to place the product, the lifting driving assembly 12 is assembled on the encapsulation support 13 and is drivingly connected to the carrier 11 to drive the carrier 11 to extend into or out of the encapsulating tank 32. In the specific embodiment, the lifting driving assembly 12 is driven by a servo motor, the carrier 11 is lifted by the servo motor, and the encapsulation stroke and encapsulation speed of the product are effectively segmented controlled, and the height and thickness of the product encapsulated each time are consistent.

[0044] In a preferred specific embodiment, a cam assembly (not shown) and a driving device (not shown) are further included, the driving device drives the encapsulation mechanism 1 to reciprocate in the horizontal direction through the cam assembly, and when the product is completely immersed in the encapsulating liquid in the encapsulating tank 32, i.e. in step S3, the encapsulation mechanism is shaken in the direction of the liquid surface of the encapsulating liquid (i.e. horizontal direction) for a certain time through the transmission of the cam assembly.

[0045] Specifically, the cam assembly is connected to the carrier 11, and the carrier 11 is driven to reciprocate in the direction of the liquid surface of the encapsulating liquid (i.e. horizontal shaking) through the cam assembly, and then the carrier 11 drives the product to reciprocate in the encapsulating liquid.

[0046] By adjusting the stroke and speed of the carrier 11 driven by the cam assembly, the appropriate horizontal direction shaking effectively destroys the surface tension of the encapsulating liquid, causing insufficient contact with the product, making the encapsulating liquid contact the product more fully, i.e. increasing the area of the encapsulating liquid contacting the product, thus, more conducive to the consistency of the encapsulating thickness, also conducive to controlling the encapsulating size of the product.

[0047] Although the present application has been specifically shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A liquid encapsulation device, characterized by: The liquid-encapsulating device comprises an encapsulating mechanism, a stirring mechanism and a liquid-accepting tank. The liquid-accepting tank comprises a large tank and an encapsulating tank, the encapsulating tank is assembled in the large tank in a lifting manner, and the encapsulating tank is switched between a feeding position in which the encapsulating tank is immersed in the large tank and a working position in which the encapsulating tank is separated from the large tank. The encapsulating mechanism and the stirring mechanism are movably assembled on the periphery of the liquid-accepting tank and correspond to the encapsulating tank in sequence. The large tank is further provided with a scraper and a scraper cylinder, the scraper is located in the large tank, the scraper cylinder is fixedly assembled on the periphery of the large tank and is drivingly connected with the scraper to drive the scraper to move back and forth in the large tank. The scraper is provided with a convex catch formed by an end face protrusion and a flow guide channel capable of guiding liquid flow. When the convex catch passes through the liquid surface of the encapsulating liquid, the convex catch breaks the solidified skin layer formed by solidification of the liquid surface, and at the same time, the flow guide channel disturbs the liquid flow sequence in the encapsulating liquid. The encapsulating device further comprises a transfer mechanism, the stirring mechanism and the encapsulating mechanism are assembled on the transfer mechanism, and the stirring mechanism and the encapsulating mechanism are driven by the transfer mechanism to correspond to the encapsulating tank in sequence.

2. The liquid encapsulation apparatus according to claim 1, wherein: The periphery of the large tank is provided with a lifting mechanism, the encapsulating tank is fixedly assembled on the lifting mechanism, and the lifting mechanism drives the encapsulating tank to be switched between the feeding position in which the encapsulating tank is immersed in the large tank and the working position in which the encapsulating tank is separated from the large tank.

3. The liquid encapsulation apparatus of claim 1, wherein: The number of the encapsulating mechanism and the corresponding liquid-accepting tank is 2, the number of the stirring mechanism is 1, the stirring mechanism is located between the two encapsulating mechanisms, and the transfer mechanism synchronously drives the stirring mechanism and the two encapsulating mechanisms to move back and forth on a guide rail.

4. The liquid encapsulation apparatus of claim 1, wherein: The stirring mechanism comprises a lifting driver and a stirrer, the lifting driver is drivingly connected with the stirrer to drive the stirring paddle of the stirrer to extend into or out of the encapsulating tank.

5. The liquid encapsulation apparatus according to claim 4, wherein: The stirring mechanism is provided with at least two stirrers which are arranged in opposite rotating directions.

6. The liquid encapsulation apparatus according to claim 1, wherein: The encapsulating mechanism comprises a carrier, a lifting driving assembly and an encapsulating support, the lifting driving assembly is assembled on the encapsulating support and is drivingly connected with the carrier to drive the carrier to extend into or out of the encapsulating tank.

7. A liquid encapsulation method, characterized by, The method comprises the following steps: S1, providing the liquid-encapsulating device according to any one of claims 1 to 6, placing products on the encapsulating mechanism, and injecting encapsulating liquid into the liquid-accepting tank until the encapsulating liquid covers the encapsulating tank in the feeding position; S2, driving the stirring mechanism to correspond to the encapsulating tank in the feeding position and to extend into the encapsulating tank to stir, and extending the stirring mechanism out of the encapsulating tank after the stirring is completed; S3, lifting the encapsulating tank to the working position, immersing the products on the encapsulating mechanism corresponding to the encapsulating tank in the working position into the encapsulating liquid in the encapsulating tank, driving the scraper cylinder to drive the scraper to move back and forth in the large tank, and breaking the solidified skin layer formed by solidification of the liquid surface by the convex catch, and at the same time, disturbing the liquid flow sequence in the encapsulating liquid by the flow guide channel; S4, driving the encapsulating mechanism to separate the products from the encapsulating tank after the immersing is completed, and lowering the encapsulating tank to the feeding position.

Images