CN1466158A

CN1466158A - Method for making metal cap type coaxial chip capacitor

Info

Publication number: CN1466158A
Application number: CNA021214468A
Authority: CN
Inventors: 王弘光
Original assignee: JIAYE SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: JIAYE SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2002-06-21
Filing date: 2002-06-21
Publication date: 2004-01-07

Abstract

A method for processing a cap-axial lead chip capacitor includes 1. formation process for the metal cap conductor 2. welding the conductor to electrodes at both ends of the capacitor 3. welding copper lead to the conductor 4. coating the capacitor with resin and solidization 5. testing and packaging, utilizing the function of accurate and quick areposition of the cap conductor and soldering mustiset electrodes of capacitor to the cap conductor at one time, to reach high speed production and lower cost and strengthen the bearing force of impulse of internal structure by their junction way.

Description

The coaxial chip capacitor manufacture method of metal cap type

Technical field

The invention provides a kind of metal cap type coaxial chip capacitor manufacture method, it can strengthen the integrally-built rupture strength of capacitor, and can reach high speed volume production scale and reduce manufacturing cost, and can make coaxial chip capacitor manufactured goods best in quality, that reliability is high.

Background technology

At present; the manufacture of common coaxial chip capacitor; each links a wire joining 2 ' with scolding tin 3 ' solid welding to the capacitor body made from ceramic material 1 ' in the two end electrodes side, imposes outside coating resin 4 ' again and the weld of capacitor body 1 ' and wire joining 2 ' is coated protection makes as shown in Figure 1 coaxial chip capacitor finished product.

Yet above-mentioned coaxial chip capacitor manufacture, its wire joining 2 ' is the conductor contact by welding axle bed 21 ' solid welding one copper conductor a 22 ' made ㄒ type mode of appearance of a planar end surface, when the welding axle bed 21 ' of its wire joining 2 ' and the electrode side of capacitor body 1 ' are done axial contraposition welding, the welding axle bed 21 ' of its planar end surface does not have can be against the design of block radial deflection, therefore need to give assist location by a tool, just can allow welding axle bed 21 ' reach effectively axially contraposition with the mutual corresponding welding of the electrode side of capacitor body 1 ', so to technologic welding technique of counterpoint requirement property height, and its wire joining 2 ' and capacitor body 1 ' adopt the mode of direct plane welding, because of copper conductor 22 ' reaches 30 centimetres of crooked easily and not easy fitted welding, technology is loaded down with trivial details, if have careless mistake can cause the deviation of axial contraposition welding precision slightly, and cause the generation of defective products, relatively also can have influence on the reliability of quality, have much room for improvement so its applicability is real.

Moreover, structural strength with above-mentioned known capacitor, its wire joining 2 ' is adopted the mode that weld on direct plane with capacitor body 1 ', that is capacitor body 1 ' designs with the axial binding that wire joining 2 ' forms equal external diameter, when being subjected to the external force percussion, its wire joining 2 ' weld very easily causes the phenomenon of peeling off, and overall construction intensity is not highly resistant to impulsive force, serious even unexpected situation generation that cause capacitor body 1 ' and copper conductor 22 ' directly to rupture.

In view of this, the inventor adopts the manufacturing of direct plane welding wire joining loaded down with trivial details at known coaxial chip capacitor, property of fine qualities is difficult to control, shortcomings such as finished product structural strength fragility are studied, and at its very crux, take up to be sought to improve, make up for shortcomings or defects, develop a kind of coaxial chip capacitor manufacture method of metal cap type finally, utilize on the industry.

Summary of the invention

The objective of the invention is to, a kind of coaxial chip capacitor manufacture method of metal cap type is provided, this method comprises following procedure:

(1) metal cap conductor forming processes: being shaped with the metal material pressing mold to be the metal cap conductor of a ㄇ body;

(2) the solid metal cap conductor of capacitor body two end electrodes face down bonding is handled: with the two end electrodes side of a plurality of capacitor bodies in a welding processing tool (JIG), adopt the nested solid welding of metal cap conductor then in the two end electrodes side of capacitor body, make the soldering of two end electrodes side of a plurality of capacitor bodies can finish solid welding and follow the metal cap conductor:

(3) metal cap conductor welding copper conductor is handled: the metal cap conductor outboard end that capacitor body two end electrodes face down bonding is solid gives the welding copper conductor, to make the capacitor with copper conductor contact;

(4) capacitor coating resin solidification is handled: the outside coating of capacitor that will have the copper conductor contact is with resin, thereby the weld of capacitor body, metal cap conductor and copper conductor applied to coat solidifies location and protection;

(5) test and packing are handled: the capacitance body of cured is tested and packed, to finish coaxial (AXIAL LEAD) chip capacitor manufactured goods of metal cap type.

Another object of the present invention is to, a kind of coaxial chip capacitor manufacture method of metal cap type is provided, utilize the direct socket solid welding of the two end electrodes side metal cap conductor of capacitor body, give behind metal cap conductor outer end welding copper conductor again that the coating resin solidification is handled and the shaping shaft to the mode of contact electrode, connect in axial contraposition and can utilize precisely function fast of contraposition that the metal cap conductor possesses in the technology, and a solid welding handle can make the multiple unit capacitor body in the two end electrodes face down bonding affixed the characteristics of metal cap conductor, to reach the benefit of high speed volume production scale, exempt conventional process fully and reach 30 centimetres of crooked easily problems that are difficult for the axial contraposition welding of assembling because of copper conductor, and then effectively enhance productivity, reduce manufacturing cost, and on property of fine qualities, also can obtain maximum stability characteristic (quality).

Another purpose of the present invention is, a kind of coaxial chip capacitor manufacture method of metal cap type is provided, its metal cap conductor and capacitor body form one section fixed mode of closing of difference cover, make the solid welding intensity of capacitor and metal cap conductor obtain the raising double, born higher external impacts, allow the whole capacitor utensil that preferable rupture strength is arranged, thereby have higher security protection performance.

Description of drawings

Fig. 1: be the generalized section of known coaxial (AXIAL LEAD) chip capacitor.

Fig. 2: be coaxial (AXIAL LEAD) chip capacitor manufacturing flow chart of metal cap type of the present invention.

Fig. 3: be the generalized section after metal cap conductor of the present invention and the capacitor body solid welding processing.

Fig. 4: be the be shaped capacitor schematic appearance of copper conductor contact of the present invention.

Fig. 5: coaxial (AXIAL LEAD) or the chip capacitor generalized section of making metal cap type for the present invention.

Embodiment

Take off technological means that purpose adopts and method on according to the present invention, cooperate graphic now and specific embodiment is described as follows in detail:

See also shown in Figure 2ly, it is for coaxial (AXIAL LEAD) chip capacitor manufacturing flow chart of metal cap type of the present invention.Wherein:

Step 1: metal cap conductor forming processes, being shaped with the metal material pressing mold to be the metal cap conductor 1 of a ㄇ body.

Step 2: the solid metal cap conductor of capacitor body two end electrodes face down bonding is handled, and also is about to capacitor body 2 and adopts the 1 nested solid welding of metal cap conductor then to handle in the two end electrodes side.Wherein this capacitor body 2 coats with ceramic material for the inside chip capacitor conductor, make its two ends have the electrode side, and the two end electrodes side of capacitor body 2 and metal cap conductor 1 are done with then solid welding (as shown in Figure 3) with tin cream 3 between interface, and this solid welding is then handled and can be utilized processing jig (JIG) that multiple unit capacitor body 2 is followed metal cap conductor 1 in a solid welding of two end electrodes side, to reach the benefit of high speed volume production scale.

Step 3: metal cap conductor welding copper conductor is handled, and capacitor body 2 solid welding metal cap conductors 1 outboard end is given welding copper conductor 4 handle, to finish the capacitor that has copper conductor 4 contacts as shown in Figure 4.

Step 4: capacitor coating resin solidification is handled, and with the outside coating resin 5 of the capacitor of tool copper conductor 4 contacts, thereby the weld of capacitor body 2, metal cap conductor 1 and copper conductor 4 is applied coating curing location and protection.

Step 5: test and packing are handled, and the capacitor that also is about to cured carries out testing package, finishes the coaxial chip capacitor manufactured goods of metal cap type smoothly.

The present invention utilizes the direct socket solid welding of the two end electrodes side metal cap conductor 1 of capacitor body 2, behind metal cap conductor 1 outer end welding copper conductor 4, give coating resin 5 cured again and the shaping shaft to the mode of contact electrode, connect in axial contraposition and can utilize precisely function fast of contraposition that metal cap conductor 1 possesses in the technology, and a solid welding handle can make multiple unit capacitor body 2 in the two end electrodes face down bonding affixed the characteristics of metal cap conductor 1, to reach the benefit of high speed volume production scale, exempt conventional process fully and reach 30 centimetres of crooked easily shortcomings that are difficult for the axial contraposition welding of assembling because of copper conductor, not only effectively enhance productivity, and be minimized manufacturing cost, and on property of fine qualities, also can obtain maximum stability characteristic (quality), metal cap conductor 1 forms one section fixed mode of closing of difference cover with capacitor body 2 simultaneously, obtain the raising that doubles for the solid welding intensity of capacitor and metal cap conductor, born higher external impacts, allow the whole capacitor utensil that preferable rupture strength is arranged, thereby have higher security protection performance, have industry applications.

In sum, the coaxial chip capacitor manufacture method of metal cap type provided by the present invention can reach expection practical value and effect really, has industrial utilization.

Claims

1. coaxial (AXIAL LEAD) chip capacitor manufacture method of a button hat type is characterized in that, comprises following procedure:

(2) the solid metal cap conductor of capacitor body two end electrodes face down bonding is handled: with the two end electrodes side of a plurality of capacitor bodies in a welding processing tool (JIG), adopt with the nested solid welding of metal cap conductor then in the two end electrodes side of capacitor body, make the soldering of two end electrodes side of a plurality of capacitor bodies can finish solid welding and follow the metal cap conductor;