CN115071044A - Manufacturing method of PN copper bar plastic-coated component - Google Patents

Manufacturing method of PN copper bar plastic-coated component Download PDF

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Publication number
CN115071044A
CN115071044A CN202210687351.9A CN202210687351A CN115071044A CN 115071044 A CN115071044 A CN 115071044A CN 202210687351 A CN202210687351 A CN 202210687351A CN 115071044 A CN115071044 A CN 115071044A
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China
Prior art keywords
copper bar
mold
copper
product
plastic
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CN202210687351.9A
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Chinese (zh)
Inventor
陈�峰
陈子恒
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Shenzhen Yusheng Optoelectronics Co ltd
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Shenzhen Yusheng Optoelectronics Co ltd
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Priority to CN202210687351.9A priority Critical patent/CN115071044A/en
Publication of CN115071044A publication Critical patent/CN115071044A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14639Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C2045/14237Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
    • B29C2045/14245Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity using deforming or preforming means outside the mould cavity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486Details, accessories and auxiliary operations
    • B29C2045/14868Pretreatment of the insert, e.g. etching, cleaning

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention discloses a manufacturing method of a PN copper bar plastic-coated component, which relates to the field of precision manufacturing and comprises the following steps: s1, selecting red copper, putting the red copper into a continuous hardware die, and punching the red copper into a plurality of copper bar shapes; s2, unfolding the shape of the copper bar, printing the copper bar on a hardware mould in a mirror image manner, processing the shape of the copper bar on front and rear templates of the hardware mould, starting a punch press, and separating the shape of the copper bar by using the pressure of the machine to act on the copper bar; s3, electroplating fog tin on the surface of the copper bar; s4, connecting the rivet and the copper bar together by using special riveting equipment and by means of the flower teeth of the nut and equipment pressure; s5, placing the copper bar and the magnetic core into a plastic mold, and performing injection molding by using an injection molding machine to complete the solidification of the product structure; s6, detecting the insulating property of the product by using a voltage withstand instrument; the invention solves the problems of complex installation, multiple working procedures, high cost, large accumulation of personal errors and unstable quality of the traditional hardware copper bar.

Description

Manufacturing method of PN copper bar plastic-coated component
Technical Field
The invention relates to the field of precision manufacturing, in particular to a manufacturing method of a PN copper bar plastic-coated component.
Background
The installation of traditional five metals copper bar is dispersive, needs solitary installation, and the cooperation precision is relatively poor, and efficiency is slow, and the accumulative total error of manual assembly can influence off-the-shelf performance, lacks insulation protection between the copper bar, has the overlap joint short circuit risk, and the security performance is poor, makes product quality stability receive the influence.
Disclosure of Invention
The invention provides a technical scheme capable of solving the problems in order to overcome the defects.
The manufacturing method of the PN copper bar plastic-coated component comprises the following process flows of blanking, stamping, electroplating, riveting, injection molding, testing, packaging and transporting, and specifically comprises the following detailed steps:
step S1, hardware blanking: selecting red copper, putting the red copper into a continuous hardware mould, and punching the red copper into a plurality of copper bar shapes by the continuous hardware mould;
step S2, press: designing a hardware mould, unfolding the shape of the copper bar, printing and engraving the copper bar on the hardware mould in a mirror image manner, processing the shape of the copper bar on a front template and a rear template of the hardware mould by utilizing numerical control wire cutting, connecting and guiding the front mold core and the rear mold core in the hardware mould by using guide pillars, then fixing the front mold core and the rear mold core on a workbench of a punch press, starting the punch press, acting on the copper bar by utilizing the pressure of the machine, separating out the shape of the required copper bar, and additionally recycling the residual waste;
step S3, electroplating: electroplating fog tin on the surface of the copper bar, wherein the thickness of the electroplating fog tin is 8-12 mu m;
step S4, press riveting: connecting the rivet and the copper bar together by using special riveting equipment and by means of the self-arranged flower teeth of the nut and equipment pressure to form a whole;
step S5, injection molding: placing the copper bar and the magnetic core into a plastic mold, and performing injection molding by using an injection molding machine to complete the curing of the product structure;
step S6, test: detecting the insulating property of the product by using a voltage withstand instrument;
step S7, packaging and transporting: the product is packaged by using the antistatic foam material, and then is loaded and transported after the packaging is finished.
Preferably, the red copper in the step S1 is T2Y2 red copper, and the composition of T2Y2 red copper is: 99.98% of copper (cu), 0.00061% of bismuth (bi), 0.00085% of antimony (sb), 0.00063% of arsenic (as), 0.0035% of iron (fe), 0.0011% of lead (pb) and 0.0014% of sulfur(s).
Preferably, the hardware mould in the step S2 is a continuous hardware mould, the copper coil punched to have the shape of the copper bar is conveyed to the hardware mould by a feeding device and a leveling device which are matched with each other, and a start switch of a punch press is touched to start continuous production and separation of the required copper bar.
Preferably, the specific steps of electroplating in step S3 are as follows:
step S301, workpiece cleaning: removing grease and stains on the surface of the copper bar;
step S302, soaking in hot water; soaking the copper bar in hot water with the temperature of more than 80 ℃ for one minute to preheat a copper bar workpiece;
step S303, chemical tinning: the plating solution is tin plating solution, the constant temperature of the plating solution is kept between 70 ℃ and 75 ℃, the preheated copper bar workpiece is fished out from hot water and is rapidly put into the plating solution, and the copper bar workpiece is soaked in the plating solution for 30 seconds to 1 minute;
step S304, hot water cleaning: fishing out the copper bar plated part plated with tin from the plating solution, quickly putting the copper bar plated part into clean hot water with the temperature of more than 75 ℃ for cleaning, and not cooling the plated part when fishing out the copper bar plated part;
step S305, drying: and drying the copper bar plated part by using hot air.
Preferably, the injection molding in step S5 includes the following specific steps:
s501, designing an injection mold according to the shape of a product;
s502, putting the plastic material into an oven for baking, wherein the baking temperature of the oven is 140 ℃, the baking time is 4-5 hours, and the plastic material adopts PPS +40 GF;
step S503, placing the copper bar into a rear mold of an injection mold, driving the injection mold to close the mold by an injection molding machine, and injecting the heated and melted plastic material into a cavity of the injection mold by the injection molding machine through screw movement;
step S504, after the cavity of the injection mold is filled with the plastic material, the mold is still and is cooled, the cooling time is 40 seconds, after the plastic material is cooled and solidified, the mold is opened, the product stays in the rear mold of the injection mold, then the ejection device of the injection mold is driven, and the product is separated from the cavity of the rear mold.
And step S505, removing gates and burrs of the product by using a cutter knife.
Preferably, the specific steps of the test in step S6 are as follows:
step S601, presetting parameters of the pressure tester, where the parameters of the pressure tester are set as: AV2000V, time 30s, DV 1000V, leakage current 0.6 MA;
step S602, fixing a test clamp of the voltage-resistant tester at the position of the exposed copper bar of the product, starting a start key, observing whether an alarm appears in the operation process, and finally judging whether the voltage-resistant insulating property of the product is qualified.
Preferably, ferrite is used as the core in step S5, and the core is formed by sintering in a high-temperature and high-pressure environment through a mold.
The invention utilizes the principle of injection molding processing to form an integral part by scattered copper bars and hardware inserts, reduces the installation fit error, reduces the manual installation cost, improves the production efficiency and the safety performance of product quality, and integrates a magnetic core component in the plastic-coated part to increase the impedance detection function of the product.
Compared with the prior art, the invention has the beneficial effects that:
1. the product cost is reduced, the labor intensity is reduced, and the working efficiency is improved.
2. The assembly is simplified, the error rate is reduced, and the product reliability is improved.
3. Realize the modularization operation processing, promote the quality performance of product.
4. The assembly space of product reduces, promotes the compactness, has reduced original busbar interval greatly, the extravagant problem of installation space.
5. The magnetic core is embedded in the die for production and is integrated with the copper bar, so that the electromagnetic induction function of the product is increased on the basis of the original electrical performance.
In conclusion, the problems that the traditional hardware copper bar is complex in installation, multiple in process, high in cost, large in human error accumulation and unstable in quality are solved; the invention adds the impedance identification function to the product through the inductance function of the copper bar and the magnetic core, solves the incompatibility phenomenon of plastic-coated products and electronic products, and realizes the function increase and the structure optimization.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic illustration of an electroplating step of the present invention;
FIG. 3 is a schematic representation of an injection molding step of the present invention;
FIG. 4 is a schematic representation of the testing steps of the present invention;
FIG. 5 is a schematic illustration of the product of the present invention prior to packaging;
FIG. 6 is a schematic view of the structure of the copper bar of the present invention;
FIG. 7 is a schematic view of another copper bar structure according to the present invention;
FIG. 8 is a schematic structural diagram of another copper bar according to the present invention;
fig. 9 is a schematic view of the structure of the magnetic core of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 9, the manufacturing method of the PN copper bar plastic-coated component of the present invention includes the following steps:
step S1, hardware blanking: selecting red copper, putting the red copper into a continuous hardware mould, and punching the red copper into a plurality of copper bar shapes by the continuous hardware mould; the red copper is usually made of coil stock, so that continuous punching is facilitated, and the operation of quick blanking is realized;
step S2, press: designing a hardware mould, unfolding the shape of the copper bar, printing and engraving the copper bar on the hardware mould in a mirror image manner, processing the shape of the copper bar on a front template and a rear template of the hardware mould by utilizing numerical control wire cutting, connecting and guiding the front mold core and the rear mold core in the hardware mould by using guide pillars, then fixing the front mold core and the rear mold core on a workbench of a punch press, starting the punch press, acting on the copper bar by utilizing the pressure of the machine, separating out the shape of the required copper bar, and additionally recycling the residual waste;
step S3, electroplating: electroplating fog tin on the surface of the copper bar, wherein the thickness of the electroplating fog tin is 8-12 mu m;
step S4, press riveting: connecting the rivet and the copper bar together by using special riveting equipment and by means of the self-arranged flower teeth of the nut and equipment pressure to form a whole; the riveting is that in the riveting process, under the external pressure, a riveting piece is subjected to plastic deformation and is extruded into a special prefabricated groove in a riveting screw and nut structure, so that the reliable connection of the two parts is realized, and the process can improve the performance stability of a product;
step S5, injection molding: placing the copper bar and the magnetic core into a plastic mold, and performing injection molding by using an injection molding machine to complete the curing of the product structure;
step S6, test: detecting the insulating property of the product by using a voltage withstand instrument;
step S7, packaging and transporting: packaging the product by using an anti-static foam material, and loading and transporting after packaging is finished; use the cotton material of bubble as packaging material, avoid the product to warp and eliminate the risk that the product collided with the damage, because the periphery of product has the electronic component, for avoiding the product static, adsorb the dust granule, will solve the product cleanliness problem with the cotton material packing of bubble of preventing static, make the performance not change.
Preferably, the red copper in the step S1 is T2Y2 red copper, and the composition of T2Y2 red copper is: 99.98% of copper (cu), 0.00061% of bismuth (bi), 0.00085% of antimony (sb), 0.00063% of arsenic (as), 0.0035% of iron (fe), 0.0011% of lead (pb) and 0.0014% of sulfur(s).
Preferably, the hardware mould in the step S2 is a continuous hardware mould, the red copper coil punched with the copper bar shape is conveyed into the hardware mould by using a feeding device and a leveling device which are matched with each other, and a start switch of a punch press is touched to start continuous production and separation of the required copper bar; in order to guarantee the stability and the machining efficiency of the copper bar, the continuous hardware die is used for machining, a special feeding device and a leveling device are adopted to convey a coil material to the hardware die, and after a starting switch of a punch press is touched, continuous production is started.
Preferably, as shown in fig. 2, the specific steps of electroplating in step S3 are as follows:
step S301, workpiece cleaning: removing grease and stains on the surface of the copper bar; ensuring the brightness of the plated part and the thickness of the plating layer;
step S302, soaking in hot water; soaking the copper bar in hot water with the temperature of more than 80 ℃ for one minute to preheat a copper bar workpiece; so as to avoid the phenomenon that the temperature of the plating solution is sharply reduced and the surface of the plating layer is not speckled when the plating solution is put into a plating solution tank;
step S303, chemical tinning: the plating solution is tin plating solution, the constant temperature of the plating solution is kept between 70 ℃ and 75 ℃, the preheated copper bar workpiece is fished out from hot water and is rapidly put into the plating solution, and the copper bar workpiece is soaked in the plating solution for 30 seconds to 1 minute; can be plated with a white and bright tin layer;
step S304, hot water cleaning: fishing out the copper bar plated part plated with tin from the plating solution, quickly putting the copper bar plated part into clean hot water with the temperature of more than 75 ℃ for cleaning, and not cooling the plated part when fishing out the copper bar plated part; washing off the residual plating solution on the plated part by using a large amount of clean hot water;
step S305, drying: drying the copper bar plated part by using hot air; the hot air can prevent the surface temperature difference of the plated part from being too large and influencing the finish degree.
Preferably, as shown in fig. 3, the injection molding in step S5 includes the following specific steps:
s501, designing an injection mold according to the shape of a product; the injection mold comprises a pouring gate system, a runner system, a cavity system, a cooling system and an ejection system;
s502, putting the plastic material into an oven for baking, wherein the baking temperature of the oven is 140 ℃, the baking time is 4-5 hours, and the plastic material adopts PPS +40 GF; the thorough drying is realized, and the moisture is removed;
step S503, placing the copper bar into a rear mold of an injection mold, driving the injection mold to close the mold by an injection molding machine, and injecting the heated and melted plastic material into a cavity of the injection mold by the injection molding machine through screw movement;
step S504, after the cavity of the injection mold is filled with the plastic material, the mold is still for cooling, the cooling time is 40 seconds, after the plastic material is cooled and solidified, the mold is opened, the product stays in the rear mold of the injection mold, and then the ejection device of the injection mold is driven, so that the product is separated from the cavity of the rear mold; cooling liquid can be introduced into the cooling system during cooling, so that the cooling speed is increased, and therefore, the cooling time of less than 40 seconds is also within the protection range of the invention;
step S505, removing a gate and burrs of a product by using an art designing knife; other cutters can be used for removing the sprue and the burrs, so that the subsequent packaging is facilitated.
Preferably, as shown in fig. 4, the specific steps of the test in step S6 are as follows:
step S601, presetting parameters of the pressure tester, where the parameters of the pressure tester are set as: AV2000V, time 30s, DV 1000V, leakage current 0.6 MA;
step S602, fixing a test clamp of a voltage-resistant tester at the position of an exposed copper bar of a product, starting a start key, observing whether an alarm appears in the operation process, and finally judging whether the voltage-resistant insulating property of the product is qualified; and when the alarm is not given, the pressure-resistant insulating performance of the product is judged to be qualified, and the product can be packaged and transported.
Preferably, as shown in fig. 5 and 9, the core in step S5 is made of ferrite, and the core is sintered in a high-temperature and high-pressure environment through a mold; the magnetic core is formed by powder metallurgy process.
The ferrite magnetic ring mainly comprises a nickel-zinc ferrite magnetic ring and a manganese-zinc ferrite magnetic ring, wherein the 2 types of magnetic rings strictly distinguish different frequencies, wherein the nickel-zinc ferrite magnetic ring is suitable for inhibiting electromagnetic interference of a high frequency band, and the manganese-zinc ferrite magnetic ring is suitable for inhibiting electromagnetic interference of a low frequency end.
The higher the magnetic permeability of the ferrite, the higher the impedance at low frequency and the lower the impedance at high frequency; different processes can be selected to manufacture the magnetic ring according to different requirements; the magnetic ring has different impedance characteristics under different frequencies, generally, the impedance is very small under low frequency, and when the signal frequency increases, the impedance presented by the magnetic ring increases sharply.
The ferrite magnetic ring has the advantages that:
1. the cable is very convenient to use and can be directly sleeved on a cable needing filtering;
2. grounding is not needed like other filtering modes, so that no special requirements are required on structural design and circuit board design;
3. when used as a common mode choke, it does not cause signal distortion, which is very expensive for a wire for transmitting a high frequency signal.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (7)

  1. The manufacturing method of the PN copper bar plastic-coated component is characterized in that the technological process of the manufacturing method comprises the steps of blanking, stamping, electroplating, press riveting, injection molding, testing, packaging and transporting, and the specific detailed steps are as follows:
    step S1, hardware blanking: selecting red copper, putting the red copper into a continuous hardware mould, and punching the red copper into a plurality of copper bar shapes by the continuous hardware mould;
    step S2, punching: designing a hardware mould, unfolding the shape of the copper bar, printing and engraving the copper bar on the hardware mould in a mirror image manner, processing the shape of the copper bar on a front template and a rear template of the hardware mould by utilizing numerical control wire cutting, connecting and guiding the front mold core and the rear mold core in the hardware mould by using guide pillars, then fixing the front mold core and the rear mold core on a workbench of a punch press, starting the punch press, acting on the copper bar by utilizing the pressure of the machine, separating out the shape of the required copper bar, and additionally recycling the residual waste;
    step S3, electroplating: electroplating fog tin on the surface of the copper bar, wherein the thickness of the electroplating fog tin is 8-12 mu m;
    step S4, press riveting: connecting the rivet and the copper bar together by using special riveting equipment and by means of the self-arranged flower teeth of the nut and equipment pressure to form a whole;
    step S5, injection molding: placing the copper bar and the magnetic core into a plastic mold, and performing injection molding by using an injection molding machine to complete the curing of the product structure;
    step S6, test: detecting the insulating property of the product by using a voltage withstand instrument;
    step S7, packaging and transporting: the product is packaged by using the antistatic foam material, and then is loaded and transported after the packaging is finished.
  2. 2. The manufacturing method of the plastic-coated PN copper bar assembly as claimed in claim 1, wherein the red copper in the step S1 is T2Y2 red copper, and the components of the T2Y2 red copper are as follows: 99.98 percent of copper (cu), 0.00061 percent of bismuth (bi), 0.00085 percent of antimony (sb), 0.00063 percent of arsenic (as), 0.0035 percent of iron (fe), 0.0011 percent of lead (pb) and 0.0014 percent of sulfur(s).
  3. 3. The method for manufacturing the plastic-coated PN copper bar assembly as claimed in claim 1, wherein the hardware mold in the step S2 is a continuous hardware mold, the red copper coil punched with the shape of the copper bar is conveyed into the hardware mold by a matched feeding device and a leveling device, and a start switch of a punch press is triggered to start continuous production and separate the required copper bar.
  4. 4. The manufacturing method of the plastic-coated PN copper bar assembly as claimed in claim 1, wherein the specific steps of electroplating in step S3 are as follows:
    step S301, workpiece cleaning: removing grease and stains on the surface of the copper bar;
    step S302, soaking in hot water; soaking the copper bar in hot water with the temperature of more than 80 ℃ for one minute to preheat a copper bar workpiece;
    step S303, chemical tinning: the plating solution is tin plating solution, the constant temperature of the plating solution is kept between 70 ℃ and 75 ℃, the preheated copper bar workpiece is fished out from hot water and is rapidly put into the plating solution, and the copper bar workpiece is soaked in the plating solution for 30 seconds to 1 minute;
    step S304, hot water cleaning: fishing out the copper bar plated part plated with tin from the plating solution, quickly putting the copper bar plated part into clean hot water with the temperature of more than 75 ℃ for cleaning, and not cooling the plated part when fishing out the copper bar plated part;
    step S305, blow-drying: and drying the copper bar plated part by using hot air.
  5. 5. The manufacturing method of the PN copper bar plastic-coated component according to claim 1, wherein the injection molding in the step S5 specifically comprises the following steps:
    s501, designing an injection mold according to the shape of a product;
    s502, putting the plastic material into an oven for baking, wherein the baking temperature of the oven is 140 ℃, the baking time is 4-5 hours, and the plastic material adopts PPS +40 GF;
    step S503, placing the copper bar into a rear mold of an injection mold, driving the injection mold to close the mold by an injection molding machine, and injecting the heated and melted plastic material into a cavity of the injection mold by the injection molding machine through screw movement;
    step S504, after the cavity of the injection mold is filled with the plastic material, the mold is still and is cooled, the cooling time is 40 seconds, after the plastic material is cooled and solidified, the mold is opened, the product stays in the rear mold of the injection mold, then the ejection device of the injection mold is driven, and the product is separated from the cavity of the rear mold.
    And step S505, removing the gate and the burr of the product by using an art designing knife.
  6. 6. The manufacturing method of the PN copper bar plastic-coated component as claimed in claim 1, wherein the specific steps of the test in the step S6 are as follows:
    step S601, presetting parameters of the pressure tester, where the parameters of the pressure tester are set as: AV2000V, time 30s, DV 1000V, leakage current 0.6 MA;
    step S602, fixing a test clamp of the voltage-resistant tester at the position of the exposed copper bar of the product, starting a start key, observing whether an alarm appears in the operation process, and finally judging whether the voltage-resistant insulating property of the product is qualified.
  7. 7. The method for manufacturing the plastic-coated PN copper bar assembly as claimed in claim 1, wherein the magnetic core in the step S5 is made of ferrite, and the magnetic core is formed by sintering in a high-temperature and high-pressure environment through a mold.
CN202210687351.9A 2022-06-17 2022-06-17 Manufacturing method of PN copper bar plastic-coated component Pending CN115071044A (en)

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CN202210687351.9A CN115071044A (en) 2022-06-17 2022-06-17 Manufacturing method of PN copper bar plastic-coated component

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