Summary of the invention
Main purpose of the present invention is for the deficiencies in the prior art, provides a kind of preparation method and 3D loop product of in-mould injection 3D loop product, and the effective heating surface (area) (HS of this 3D loop product is large, and efficiency is high, homogeneous heating.
For achieving the above object, the present invention is by the following technical solutions:
A preparation method for in-mould injection 3D loop product, comprises the following steps:
A. by metal material processing integrally profile be pot shape multi-turn around distribution 3D coil;
B. at the side integrated injection molding moulding of described 3D coil;
C. on described 3D coil, carry out quadric injection mould to be covered by described 3D coil, only expose two contacts as coil both positive and negative polarity.
Further:
The side of described 3D coil is the convex side of described 3D coil or the recess side of described 3D coil.
Step b be included in the edge of described moulding one-body molded go out locating button.
Described locating button comprises multiple locating buttons that circumferentially uniform intervals distribution is arranged.
Step c reserves dead slot in the position of described contact when comprising quadric injection mould, is exposed by described dead slot to make described contact.
In step a, described 3D coil is stamping forming by bulk metallic materials.
Described metal material is silver, brass, phosphor-copper or beryllium copper material.
Injected plastics material used in step b and step c is plastic cement or ceramic material.
A kind of in-mould injection 3D loop product, comprising overall profile is that the multi-turn of pot shape is around the 3D coil of distribution and the injected plastics material part with described 3D coil integrated injection molding, described 3D coil is coated on inside by described injected plastics material part, is only exposed by two contacts of the both positive and negative polarity of described 3D coil.
Further, described 3D coil multi-turn is around being scattered in circle, square or polygon.
Beneficial effect of the present invention:
3D loop product of the present invention, Distribution of Magnetic Field is even, and actual induction active area is large, homogeneous heating, and the efficiency of heating surface is high, and properties of product are stablized.Be side depression and pot shape 3D coil that opposite side arches upward and injected plastics material is one-body molded makes 3D loop product by overall profile, during for products such as Intelligent pans, except traditional bottom-heated, can realize heating the circulating type of whole inner bag, obtain overall heating effect very equably, the increase of heating surface (area) (HS contrast normal coil reaches 50%, heats up rapidly and homogeneous heating.Compare a few hectowatt power upper limit of the limited resistance dish heat safety of conventional coil, 3D loop product of the present invention can easily reach about 1500 watts, and efficiency is high.
Because the integral molded plastic of coil does not expose, only spill two contacts, therefore coil is played a very good protection, especially corrosion-resistant, and very can reliably waterproof, greatly can extend product service life.Coil integral molded plastic is wrapped, product can also be avoided may to stick the problem be short-circuited together with between the circuit of coil afterwards of a specified duration.The present invention also helps coil and obtains higher quality factor, thus the inductance value of the coil that significantly reduces the wastage, improves.
In-mould injection 3D loop product provided by the invention can be widely used in various appliance field, as Smart Home electrical equipment, comprise Intelligent pan, intelligent refrigerator, intelligent television etc., the loop product for the multi-functional consumer electronics in future provides dust-proof, scratch resistant, anticorrosion, shatter-resistant, the excellent solution such as shockproof, anti-oxidant.
In preferred version, after adopting punching press block of metal, the processes such as CNC, radium carving and/or finishing impression goes out coil, and the width of coil and coil-span can process according to actual needs very flexibly and easily and adjust.
Detailed description of the invention
Below embodiments of the present invention are elaborated.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
Consult Fig. 1 to Fig. 4, in one embodiment, a kind of preparation method of in-mould injection 3D loop product, comprises the following steps:
A. by metal material processing integrally profile be pot shape multi-turn around distribution 3D coil 1;
B. at the side integrated injection molding moulding 2 of described 3D coil 1;
C. on described 3D coil 1, carry out quadric injection mould, described 3D coil 1 covers by quadric injection mould material 3, only exposes two contacts 6 as coil both positive and negative polarity.
In different embodiments, in step a, 3D coil can multi-turn around being scattered in circle (as shown in Figure 1-2), square or polygon etc.
In a preferred embodiment, in step a, described 3D coil 1 can be that bulk metallic materials is stamping forming.Described metal material can adopt but be not limited to the materials such as silver, brass, phosphor-copper or beryllium copper.Injected plastics material used in step b and step c can be plastic material, also can for being suitable for the ceramic material of injection moulding.
As shown in Figure 2, in a kind of preferred embodiment, in step b, the side of injection moulding 3D coil 1 is the convex side of described 3D coil 1.
In another kind of embodiment, in step b, the side of injection moulding 3D coil 1 also can be the recess side of 3D coil 1.
As shown in Fig. 2-Fig. 3, in a preferred embodiment, step b be included in the edge of described moulding 2 one-body molded go out locating button 4.Multiple locating button 4 can be set in uniform intervals distribution.
As Figure 3-Figure 4, in a preferred embodiment, when step c comprises quadric injection mould, reserve dead slot 7 in the position of described contact 6, exposed by described dead slot 7 to make described contact 6.
Consult Fig. 1 to Fig. 4, in one embodiment, a kind of in-mould injection 3D loop product, comprising overall profile is that the multi-turn of pot shape is around the 3D coil 1 of distribution and the injected plastics material part with described 3D coil 1 integrated injection molding, described 3D coil 1 is coated on inside by described injected plastics material part, is only exposed by two contacts 6 of the both positive and negative polarity of described 3D coil 1.In a further embodiment, 3D loop product can possess the product feature of foregoing individual embodiments or the combination of feature.
Below be described in further detail specific embodiments of the invention.
First, according to the shape of product needed by 3D coil 1 punch forming, 3D coil 1 is selected and is conducted electricity very well, and resistivity is little, the metal material of rapid heat dissipation.Preferred silver, brass, phosphor-copper, beryllium copper etc.3D coil 1 adopts impact style, comprises sawing sheet, stretching, the process such as die-cut.The length and width of 3D coil 1 can set as required, can all >=160mm.The width of 3D coil 1 and coil-span can set as required.Preferably, the wide 1.5mm ~ 6.0mm of coil, live width 0.5 ~ 3.0mm, to obtain the irritability that larger inductance value is become reconciled by preferably size.3D coil 1 preferably does Nickel Plating Treatment.
After 3D coil 1 punch forming, put it in injection mold, integrated injection molding moulding 2 after matched moulds, the material of moulding 2 can be any one plastic cement or ceramic material.Plastic cement is such as PC, ABS, PC+ABS, PC+20%GF etc.The thickness of 3D coil 1 is 1.0mm ~ 3.0mm.During injection moulding, nozzle temperature is 270 ~ 300 DEG C, and mold temperature is 60 ~ 100 DEG C, and injection pressure is 50 ~ 80MPa.
Two contacts 6 are formed in the position of 3D coil 1 close head, tail.Can relevant position welding on two metal contact 6.Two contacts 6 do pretreatment, as nickel plating or gold-plated.Do Nickel Plating Treatment, can prevent product surface with air in or water oxygen or chlorine generation chemical reaction, outward appearance can be made to keep clean beautiful, increase the service life.Do gold-plated process, chemical stability is good.
Finally the structural member obtained after an injection moulding is put into mould, quadric injection mould plastic cement in mould, 3D coil covers by quadric injection mould material 3, only exposes two contacts, 6, two contacts 6 and forms both positive and negative polarity.Thus obtained 3D loop product.
After 3D loop product switches on power, formed one around magnetic field, be converted to heat energy by magnetic field energy and heat product, make electrical equipment have heating function, 3D loop product itself is not generated heat.This 3D loop product heating area is large, and heating effect is even, and save space again, make electrical equipment volume little, overall weight alleviates simultaneously.In the course of work, when the alternate magnetic force line in low coverage magnetic field is by neighbouring magnetic metal (iron, cobalt, nickel) material, the microstructure of metal can be driven, produce countless little eddy current, Metallic Microstructure itself is rubbed mutually thus self-heating, thus reaches the object of noncontact heated metal material.3D loop product is by electromagnetic induction heating, and coil itself does not generate heat because of magnetic field, and heating efficiency and efficiency are all very high.
Except being used as load coil, coil of the present invention also can be used for the purposes such as conduction, antenna receiving signal.
Above content combines concrete/preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; its embodiment that can also describe these makes some substituting or modification, and these substitute or variant all should be considered as belonging to protection scope of the present invention.