CN213001282U - Sorting unit of multilayer ceramic capacitor - Google Patents
Sorting unit of multilayer ceramic capacitor Download PDFInfo
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- CN213001282U CN213001282U CN202021523947.8U CN202021523947U CN213001282U CN 213001282 U CN213001282 U CN 213001282U CN 202021523947 U CN202021523947 U CN 202021523947U CN 213001282 U CN213001282 U CN 213001282U
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Abstract
The utility model relates to a sorting unit of multilayer ceramic capacitor belongs to electronic component technical field. The utility model discloses a sorting unit of multilayer ceramic capacitor comprises the baffle that is provided with a plurality of straight columniform first through-holes and the locating plate that is provided with the second through-hole of a plurality of round platform shapes, is used for sorting out multilayer ceramic capacitor, can separate the yields and the reliability of small-size multilayer ceramic capacitor at the position of the difference of height in the second through-hole with thickness, realizes the high accuracy of the poor yields of thickness discrepancy.
Description
Technical Field
The utility model relates to a sorting unit of multilayer ceramic capacitor belongs to electronic component technical field.
Background
Generally, a process for manufacturing a multilayer ceramic capacitor includes forming an electrode pattern on a ceramic film which is not sintered by a screen printing method, laminating a plurality of ceramic films on which the electrode pattern is formed and a plurality of ceramic films on which the electrode pattern is not formed in a predetermined order, cutting the laminated body into rectangular parallelepiped bodies, removing a binder, sintering the laminated body to densify the laminated body into a ceramic body having dielectric properties, and forming external electrodes on both ends of the ceramic body to manufacture a multilayer ceramic capacitor.
In the manufacturing process of the multilayer ceramic capacitor, the thickness of a part of the capacitor is abnormal due to the occurrence of an abnormal number of stacked ceramic sheets during lamination, an abnormal thickness of the ceramic sheets, or the like, and a defective product having an excessive thickness may be present in the whole batch of capacitor products. These defective products are generally found in the manufacturing process until the capacitor is cut and molded into a rectangular parallelepiped laminate, and at this time, the defective products are mixed in a large amount of products, and the uniformity of the product size is deteriorated. For capacitors with larger size specifications, the thickness difference between good products and defective products is generally larger, and the sorting is easier, but for capacitors with small sizes such as 0201 specification, 01005 specification, 008004 specification, the thickness difference between good products and defective products is very small, the sorting is very difficult, and the conventional sorting device is difficult to meet the high precision requirement. Such defective products with an excessive thickness will eventually adversely affect the taping of the capacitor and the mounting of the wiring board.
The demand for small-sized multilayer ceramic capacitors for miniaturization and multi-functionalization of electronic devices is increasing, and multilayer ceramic capacitors of 008004 size, which are used in larger and smaller quantities, are also beginning to be applied to small-sized portable devices such as smart phones, so that the problem of poor product sorting due to the over-thickness of the small-sized multilayer ceramic capacitors is urgently needed to be solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's weak point and provide a multilayer ceramic capacitor's sorting unit, can select small-size multilayer ceramic capacitor's the super poor defective products of thickness with the high accuracy branch.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the sorting device for the multilayer ceramic capacitors comprises a guide plate and a positioning plate, wherein the guide plate is provided with a plurality of first through holes, the first through holes are in a straight cylindrical shape, and the depth of each first through hole is not less than one half of the length of each multilayer ceramic capacitor; the positioning plate is provided with a plurality of second through holes, the second through holes are in a round table shape, the diameter of the lower bottom surfaces of the second through holes is larger than the diagonal length of the multilayer ceramic capacitor, the difference between the diameter of the lower bottom surfaces of the second through holes and the diagonal length of the multilayer ceramic capacitor is not larger than 0.05mm, the diameter of the upper bottom surfaces of the second through holes is smaller than the diameter of the lower bottom surfaces of the second through holes, and the included angle between a bus of each second through hole and the axis of the second through hole is 1-5 degrees.
The utility model provides a sorting unit who comprises the baffle that is provided with a plurality of straight columniform first through-holes and the locating plate that is provided with the second through-hole of a plurality of round platform shapes selects separately multilayer ceramic capacitor, can have the yields and the defective products separation of small difference with thickness in the position of the difference of height in the second through-hole, realizes selecting separately the high accuracy of the poor yields of thickness discrepancy.
As the preferred embodiment of sorting unit, the degree of depth of first through-hole is 0.8 ~ 1.2 times of multilayer ceramic capacitor's length.
As the preferred embodiment of sorting unit, the quantity of second through-hole equals with the quantity of first through-hole, the distribution position and the first through-hole one-to-one of second through-hole. That is, when the guide plate and the positioning plate are stacked up and down, all the first through holes and the second through holes can be completely aligned one by one.
As a preferred embodiment of the sorting apparatus of the present invention, an included angle between a bus of the second through hole and an axis of the second through hole is 2 ° to 3 °.
As the utility model discloses a sorting unit's preferred embodiment, the bottom surface diameter of first through-hole is 0.09mm ~ 0.73 mm. In order to facilitate the introduction of the multilayer ceramic capacitor having a small size, the diameter D1 of the bottom surface of the first via hole may be generally 0.09mm to 0.73 mm.
As the utility model discloses a sorting unit's preferred embodiment, the diameter of the lower bottom surface of second through-hole is 0.09mm ~ 0.68mm, the diameter of the last bottom surface of second through-hole is 0.08mm ~ 0.65 mm.
As a preferred embodiment of the sorting apparatus of the present invention, the multilayer ceramic capacitor is a finished product of a multilayer ceramic capacitor or a semi-finished product of a multilayer ceramic capacitor, and the semi-finished product of the multilayer ceramic capacitor is a non-sintered laminate or a ceramic body formed by sintering.
Multilayer ceramic capacitor can be multilayer ceramic capacitor's finished product, also can be multilayer ceramic capacitor's semi-manufactured goods for example not sintered stack or the ceramic body that forms through the sintering, but preferred stack, that is to say to reach better separation effect, should divide before the sintering and select as the best after the shaping of cutting in the multilayer ceramic capacitor processing procedure. Because the ceramic body or the finished product of the multilayer ceramic capacitor shrinks after being sintered and has a smaller size than the laminated body, the size difference between a good product and a defective product is reduced, and the sorting difficulty is increased; the laminated body is not sintered, so that the sorting of defective products with ultra-poor thickness is relatively easy.
As a preferred embodiment of the sorting apparatus of the present invention, the multilayer ceramic capacitor is a small-sized multilayer ceramic capacitor of 0201, 01005 or 008004 standard.
When the sorting device for the multilayer ceramic capacitors is used, the multilayer ceramic capacitors are sorted according to the following steps:
(1) sequentially overlapping the guide plate and the positioning plate from top to bottom to enable the guide plate and the positioning plate to be tightly attached, and enabling the positions of the first through hole and the second through hole to be staggered with each other, so that the first through hole is completely shielded by the positioning plate, and then leading the multilayer ceramic capacitors into the first through hole;
the guide plate and the positioning plate are sequentially overlapped from top to bottom, so that the guide plate and the positioning plate are tightly attached, and the positions of the first through hole and the second through hole are staggered, so that the first through hole is completely shielded by the positioning plate. If the guide plate and the positioning plate are not closely attached, the multilayer ceramic capacitor easily enters into the gap between the guide plate and the positioning plate, which hinders the introduction operation. Then, a plurality of multilayer ceramic capacitors are placed on a surface of the guide plate on a side thereof facing away from the positioning plate, and the multilayer ceramic capacitors are caused to jump by applying a vibrating force to the guide plate so as to easily fall into the first through-holes with the short side surfaces as front ends. At this time, since the first through hole is completely shielded by the positioning plate, the multilayer ceramic capacitor is held by the positioning plate.
The depth of the first through hole is 0.8-1.2 times of the length of the multilayer ceramic capacitor, and the depth of the first through hole is too small to be conveniently led into the multilayer ceramic capacitor; if the depth of the first through hole is too large, it is likely that two multilayer ceramic capacitors are housed in one through hole and overlapped up and down, and the sorting may be disturbed.
(2) The guide plate and the positioning plate are relatively moved while keeping a close fit state, so that the first through hole and the second through hole are completely aligned, and the multilayer ceramic capacitor falls into the second through hole;
the guide plate and the positioning plate move relatively while keeping a close fit state, and after all the first through holes and the second through holes are completely aligned one by one, vibration force can be applied to the guide plate, so that the multilayer ceramic capacitor jumps, and the multilayer ceramic capacitor is made to fall into the second through holes. Since the guide plate has corrected the orientation of the multilayer ceramic capacitor in step (1) such that the short side faces toward the second through-holes, the multilayer ceramic capacitor is relatively liable to fall into the second through-holes.
When the diameter of the lower bottom surface of the second through hole is greater than the diagonal length of the multilayer ceramic capacitor and the difference between the diameter of the lower bottom surface and the diagonal length of the multilayer ceramic capacitor is not greater than 0.05mm, the multilayer ceramic capacitor can easily enter the first through hole by taking the short side surface as the front end, and can not enter the first through hole by taking other surfaces which are not short side surfaces as the front end, and after the multilayer ceramic capacitor enters the first through hole, the multilayer ceramic capacitor does not have too much vacant active space, namely, the first through hole just holds the multilayer ceramic capacitor.
(3) Removing the guide plate, and applying a vibration force to the positioning plate to enable the multilayer ceramic capacitors with different thicknesses to be positioned at different height positions in the second through hole;
and removing the guide plate, and applying vibration force to the positioning plate to enable the multilayer ceramic capacitor to fall to the lowest position in the second through hole allowed by the size of the multilayer ceramic capacitor. That is, the multilayer ceramic capacitor having a larger thickness is located higher in the second through hole than the multilayer ceramic capacitor having a smaller thickness. Good products with qualified thickness and defective products with out-of-thickness are positioned at different heights in the second through hole and are separated.
The second through hole is in a circular truncated cone shape, the included angle theta between the generatrix of the circular truncated cone and the axis of the circular truncated cone is 1-5 degrees, preferably 2-3 degrees, good products and defective products with small thickness differences are easy to form enough distance in height in the second through hole, and sorting is convenient.
(4) Taking out the multilayer ceramic capacitor at the higher position in the second through hole, and leaving the multilayer ceramic capacitor at the lower position in the second through hole to finish the sorting of the multilayer ceramic capacitors;
the multilayer ceramic capacitor located higher in the second through-hole may be sucked out using a magnet while leaving the multilayer ceramic capacitor located lower, or the multilayer ceramic capacitor located higher may be caused to protrude a small portion from the surface of the aligning plate while the multilayer ceramic capacitor located lower is entirely within the second through-hole, so that the multilayer ceramic capacitor partially protruding from the surface of the aligning plate is stuck out using, for example, a film.
The utility model discloses the small-size multilayer ceramic capacitor of specifications such as 0201, 01005 and 008004 of specially adapted, nevertheless the utility model discloses also can be used to the multilayer ceramic capacitor of specification more than 0201, only need adjust the relevant size of baffle and locating plate and first through-hole and second through-hole can. Additionally, the utility model discloses be not limited to and use at multilayer ceramic capacitor, also can use at chip resistor, chip inductance etc. other kinds of SMD ceramic electronic component.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a sorting unit of multilayer ceramic capacitor comprises the baffle that is provided with a plurality of straight columniform first through-holes and the locating plate that is provided with the second through-hole of a plurality of round platform shapes, is used for sorting out multilayer ceramic capacitor, can separate the yields and the reliability of small-size multilayer ceramic capacitor at the position of the difference of height in the second through-hole with thickness, realizes the high accuracy of the poor yields of thickness discrepancy.
Drawings
Fig. 1 is an external view of a multilayer ceramic capacitor.
Fig. 2 is a plan view of a guide plate of the multilayer ceramic capacitor sorting apparatus.
FIG. 3 is a sectional view of a guide plate of a sorting apparatus for multilayer ceramic capacitors taken along the direction I-I.
Fig. 4 is a plan view of a positioning plate of the multilayer ceramic capacitor sorting apparatus.
FIG. 5 is a sectional view of the positioning plate of the multilayer ceramic capacitor sorting apparatus taken along the direction II-II.
Fig. 6 is a sectional view of introducing a multilayer ceramic capacitor into a first via hole.
Fig. 7 is a sectional view of introducing a multilayer ceramic capacitor into a second via hole.
Fig. 8 is a top view of a multilayer ceramic capacitor in a second via.
Fig. 9 is a sectional view of the multilayer ceramic capacitor in the second via hole in the iii-iii direction.
The multilayer ceramic capacitor comprises a substrate, a conducting plate, a locating plate, a multilayer ceramic capacitor, a first through hole, a second through hole and a conducting plate, wherein the conducting plate is 1, the conducting plate is 2, the locating plate is 3, the multilayer ceramic capacitor is 12, and the first through hole is 22.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the following embodiments.
Example 1
An external view of the multilayer ceramic capacitor is schematically shown in fig. 1, and for convenience of description, a surface formed by a width (W) and a thickness (T) of the rectangular parallelepiped multilayer ceramic capacitor is referred to as a short side surface. The length of the diagonal of the short side is S.
A sorting device for a multilayer ceramic capacitor comprises a guide plate and a positioning plate.
A top view of a guide plate of a multilayer ceramic capacitor sorting apparatus is shown in FIG. 2, and a cross-sectional view of the guide plate of the multilayer ceramic capacitor sorting apparatus taken along the direction I-I is shown in FIG. 3, the guide plate being provided with a plurality of first through-holes 12. The first through hole is in the shape of a right cylinder. In order to facilitate the introduction of the multilayer ceramic capacitor having a small size, the diameter D1 of the bottom surface of the first via hole may be generally 0.09mm to 0.73 mm.
The depth of the first through hole, namely the thickness of the guide plate, is H which is more than or equal to 0.5L, preferably, H is more than or equal to 0.8L and less than or equal to 1.2L.
A plan view of the positioning plate of the multilayer ceramic capacitor sorting apparatus is shown in FIG. 4, a sectional view of the positioning plate of the multilayer ceramic capacitor sorting apparatus in a direction II-II is shown in FIG. 5, and the positioning plate is provided with a plurality of second through holes. Preferably, the number of the second through holes 22 is equal to the number of the first through holes 12, and the distribution positions of the second through holes correspond to the first through holes one by one, that is, when the guide plate and the positioning plate are stacked up and down, all the first through holes and the second through holes may be completely aligned one by one.
The shape of the second through hole is a circular truncated cone, the diameter of the lower bottom surface of the second through hole is D2, and S is more than D2 and less than or equal to S +0.05 mm. D2 may be generally in the range 0.09mm to 0.68 mm. The diameter of the upper bottom surface of the second through hole is D3, D3 < D2. D3 may be generally in the range 0.08mm to 0.65 mm. The included angle theta between the generatrix of the second through hole and the axis of the second through hole is 1-5 degrees, preferably 2-3 degrees.
Multilayer ceramic capacitor can be multilayer ceramic capacitor's finished product, also can be multilayer ceramic capacitor's semi-manufactured goods for example not sintered stack or the ceramic body that forms through the sintering, but preferred stack, that is to say to reach better separation effect, should divide before the sintering and select as the best after the shaping of cutting in the multilayer ceramic capacitor processing procedure. Because the ceramic body or the finished product of the multilayer ceramic capacitor shrinks after being sintered and has a smaller size than the laminated body, the size difference between a good product and a defective product is reduced, and the sorting difficulty is increased; the laminated body is not sintered, so that the sorting of defective products with ultra-poor thickness is relatively easy.
When the sorting device for the multilayer ceramic capacitors is used, the multilayer ceramic capacitors are sorted according to the following steps:
As shown in fig. 6, a sectional view of the multilayer ceramic capacitor introduced into the first through hole is shown, and the guide plate 1 and the positioning plate 2 are sequentially stacked from top to bottom so that the guide plate and the positioning plate are closely attached, and the positions of the first through hole 12 and the second through hole 22 are shifted from each other, so that the first through hole is completely blocked by the positioning plate. If the guide plate and the positioning plate are not closely attached, the multilayer ceramic capacitor easily enters into the gap between the guide plate and the positioning plate, which hinders the introduction operation. Then, a plurality of multilayer ceramic capacitors 3 are placed on the surface of the lead plate on the side thereof facing away from the positioning plate, and the multilayer ceramic capacitors are caused to jump by applying a vibrating force to the lead plate so as to easily fall into the first through-holes with the short side surfaces as the front ends. At this time, since the first through hole is completely shielded by the positioning plate, the multilayer ceramic capacitor is held by the positioning plate.
The depth H of the first through hole is preferably more than or equal to 0.8L and less than or equal to 1.2L, and H is too small to be conveniently led into the multilayer ceramic capacitor; if H is too large, two multilayer ceramic capacitors stacked one on top of the other are likely to be accommodated in one through hole, and this may disturb the sorting.
And 2, relatively moving the guide plate and the positioning plate while keeping the guide plate and the positioning plate in a tightly attached state, and completely aligning the first through hole and the second through hole, so that the multilayer ceramic capacitor falls into the second through hole.
The sectional view of the multilayer ceramic capacitor introduced into the second through-hole is shown in fig. 7, so that the guide plate and the positioning plate are relatively moved while being kept in a tightly attached state, and after all the first through-holes and the second through-holes are completely aligned one by one, a vibration force can be applied to the guide plate to cause the multilayer ceramic capacitor to bounce, and the multilayer ceramic capacitor is caused to fall into the second through-hole. Since the orientation of the multilayer ceramic capacitor has been corrected by the jig in step 1 such that the short side faces toward the second via hole, the multilayer ceramic capacitor is relatively liable to fall into the second via hole.
When S is more than D2 and is less than or equal to S +0.05mm, the multilayer ceramic capacitor can easily enter the first through hole by taking the short side face as the front end, but can not enter the first through hole by taking other faces which are not short side faces as the front ends, and after the multilayer ceramic capacitor enters the first through hole, no too much vacant active space exists, namely, the first through hole just holds the multilayer ceramic capacitor.
And 3, removing the guide plate, and applying vibration force to the positioning plate to enable the multilayer ceramic capacitors with different thicknesses to be positioned at different heights in the second through hole.
A plan view of the multilayer ceramic capacitor in the second through-hole is shown in FIG. 8, a sectional view of the multilayer ceramic capacitor in the second through-hole in the III-III direction is shown in FIG. 9, and the guide plate is removed and a vibrating force is applied to the positioning plate to allow the multilayer ceramic capacitor to fall to the lowest position in the second through-hole allowed by its own size. That is, the multilayer ceramic capacitor having a larger thickness is located higher in the second through hole than the multilayer ceramic capacitor having a smaller thickness. Good products with qualified thickness and defective products with out-of-thickness are positioned at different heights in the second through hole and are separated.
The second through hole is in a circular truncated cone shape, the included angle theta between the generatrix of the circular truncated cone and the axis of the circular truncated cone is 1-5 degrees, preferably 2-3 degrees, good products and defective products with small thickness differences are easy to form enough distance in height in the second through hole, and sorting is convenient.
And 4, taking out the multilayer ceramic capacitor at the higher position in the second through hole, and leaving the multilayer ceramic capacitor at the lower position in the second through hole to finish the sorting of the multilayer ceramic capacitors.
The multilayer ceramic capacitor located higher in the second through-hole may be sucked out using a magnet while leaving the multilayer ceramic capacitor located lower, or the multilayer ceramic capacitor located higher may be caused to protrude a small portion from the surface of the aligning plate while the multilayer ceramic capacitor located lower is entirely within the second through-hole, so that the multilayer ceramic capacitor partially protruding from the surface of the aligning plate is stuck out using, for example, a film.
The utility model discloses the small-size multilayer ceramic capacitor of specifications such as 0201, 01005 and 008004 of specially adapted, nevertheless the utility model discloses also can be used to the multilayer ceramic capacitor of specification more than 0201, only need adjust the relevant size of baffle and locating plate and first through-hole and second through-hole can. Additionally, the utility model discloses be not limited to and use at multilayer ceramic capacitor, also can use at chip resistor, chip inductance etc. other kinds of SMD ceramic electronic component.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The sorting device for the multilayer ceramic capacitors is characterized by comprising a guide plate and a positioning plate, wherein the guide plate is provided with a plurality of first through holes, the first through holes are in a straight cylindrical shape, and the depth of each first through hole is not less than one half of the length of each multilayer ceramic capacitor; the positioning plate is provided with a plurality of second through holes, the second through holes are in a round table shape, the diameter of the lower bottom surfaces of the second through holes is larger than the diagonal length of the multilayer ceramic capacitor, the difference between the diameter of the lower bottom surfaces of the second through holes and the diagonal length of the multilayer ceramic capacitor is not larger than 0.05mm, the diameter of the upper bottom surfaces of the second through holes is smaller than the diameter of the lower bottom surfaces of the second through holes, and the included angle between a bus of each second through hole and the axis of the second through hole is 1-5 degrees.
2. The sorting apparatus according to claim 1, wherein the depth of the first through-hole is 0.8 to 1.2 times the length of the multilayer ceramic capacitor.
3. The sorting device according to claim 1, wherein the number of the second through holes is equal to the number of the first through holes, and the distribution positions of the second through holes correspond to the first through holes one to one.
4. The sorting device according to claim 1, wherein the generatrix of the second through-hole has an angle of 2 ° to 3 ° with the axis of the second through-hole.
5. The sorting apparatus according to claim 1, wherein the first through-hole has a bottom surface diameter of 0.09mm to 0.73 mm.
6. The sorting apparatus according to claim 1, wherein the diameter of the lower bottom surface of the second through-hole is 0.09mm to 0.68 mm.
7. The sorting apparatus according to claim 1, wherein the diameter of the upper bottom surface of the second through hole is 0.08mm to 0.65 mm.
8. The sorting apparatus according to claim 1, wherein the multilayer ceramic capacitor is a finished product of a multilayer ceramic capacitor or a semi-finished product of a multilayer ceramic capacitor, and the semi-finished product of a multilayer ceramic capacitor is an unsintered laminate or a sintered ceramic body.
9. The sorting apparatus of claim 1, wherein the multilayer ceramic capacitor is a small size multilayer ceramic capacitor of 0201, 01005, or 008004 gauge.
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| CN202021523947.8U CN213001282U (en) | 2020-07-28 | 2020-07-28 | Sorting unit of multilayer ceramic capacitor |
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| CN202021523947.8U CN213001282U (en) | 2020-07-28 | 2020-07-28 | Sorting unit of multilayer ceramic capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921868A (en) * | 2020-07-28 | 2020-11-13 | 广东风华高新科技股份有限公司 | Method and device for sorting multilayer ceramic capacitors |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921868A (en) * | 2020-07-28 | 2020-11-13 | 广东风华高新科技股份有限公司 | Method and device for sorting multilayer ceramic capacitors |
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