CN110718743A - Multiple injection molding antenna and preparation process thereof - Google Patents

Abstract

The invention discloses a multi-time injection molding antenna, which comprises a plurality of antenna radiating sheets, a metal outer frame and filling plastic; the antenna radiation piece comprises an antenna radiation piece body and an antenna column; the metal outer frame is provided with a plurality of grooves for placing antenna radiation pieces, the bottom of each groove is provided with a first through hole, and the free end of the antenna column penetrates through the first through hole to be connected with the PCBA; part of filling plastic is filled in the groove, a first mounting position matched with the antenna radiation sheet is arranged at the filling position, and the antenna radiation sheet is arranged in the first mounting position, so that the antenna radiation sheet is fixedly arranged in the groove; part of filling plastic is filled in the groove, and part of the filling plastic wraps the antenna radiating sheet, so that the antenna radiating sheet is isolated from the metal outer frame; the upper surface of the antenna radiation piece body is not shielded by filling plastic. The invention realizes the precise combination of the antenna and the metal frame through the filling plastic formed by multiple times of injection molding.

Description

Multiple injection molding antenna and preparation process thereof

Technical Field

The invention relates to a process for mounting and injection molding a 5G antenna in electronic communication equipment, in particular to a multi-time injection molding antenna and a preparation process thereof.

Background

With the approach of the 5G era, 5G communication equipment manufacturers have an increasing demand for being able to satisfy the 5G communication antenna. Meanwhile, the aesthetic requirements of consumers on the appearance of electronic terminal products are also increasing. The antenna assembling production process which can simultaneously meet the requirements of small volume and high precision of the 5G antenna and can not influence the appearance of the terminal equipment is more and more important. In the existing 4G metal frame mobile phone, the whole metal frame can be used as a part of an antenna, and the frequency of 5G communication is high, and the wavelength is short, so that the size of a single antenna is smaller, so that the metal frame must be divided into a plurality of independent small antennas, the metal frame cannot be lowered to be used as a whole as a part of the antenna, the metal appearance limitation is broken through, and the combination of the antenna and the metal frame in appearance is a problem which needs to be solved urgently.

Disclosure of Invention

In order to solve the above problems, the present invention provides a multi-injection molded antenna, which is precisely combined with a metal frame by filling plastic through multi-injection molding.

The invention provides a preparation process of a multi-time injection molding antenna, which realizes the precise combination of the antenna and a metal frame through multi-time injection molding.

The technical scheme of the invention is as follows:

a multi-time injection molding antenna comprises a plurality of antenna radiating sheets, a metal outer frame and filling plastic;

the antenna radiation piece comprises an antenna radiation piece body and an antenna column which is arranged below the antenna radiation piece body and connected with the antenna radiation piece body;

a plurality of grooves are formed in the metal outer frame and used for placing the antenna radiation pieces, first through holes are formed in the bottoms of the grooves, and the free ends of the antenna columns of the antenna radiation pieces penetrate through the first through holes to be connected with the PCBA;

part of the filling plastic is filled in the groove, a first mounting position matched with the antenna radiation sheet is arranged at the filling position, and the antenna radiation sheet is arranged in the first mounting position, so that the antenna radiation sheet is fixedly arranged in the groove; part of the filled plastic is filled in the groove, and the filled plastic partially wraps the antenna radiating sheet, so that the antenna radiating sheet is isolated from the metal outer frame;

the upper surface of the antenna radiation piece body is not shielded by the filling plastic.

Preferably, the antenna further comprises a floating metal sheet, a second through hole is formed in the floating metal sheet, and the antenna column of the antenna radiation sheet penetrates through the second through hole; part of the filling plastic fills the groove, and a third through hole matched with the free end of the antenna radiation piece is arranged at the filling position; part of the filling plastic wraps the floating metal sheet and the second through hole is reserved, and a second mounting position matched with the antenna radiation sheet is formed and arranged at the same time when the filling plastic wraps the floating metal sheet; the antenna column of the antenna radiation piece passes through a second mounting position, the second through hole and a third through hole to be connected with the PCBA, and the filling plastic cement accurately positions the antenna radiation piece and the floating metal piece through the second mounting position, the second through hole and the third through hole; part of the filled plastic is filled in the groove, so that the antenna radiation sheet, the floating metal sheet and the metal outer frame are isolated from each other; the upper surface of the antenna radiation piece body is not shielded by the filling plastic.

Preferably, the upper surface of the antenna radiation piece body and the upper surface of the filled plastic are flush with the surface of the metal outer frame.

Preferably, the metal outer frame is of an integrally formed structure and comprises a top surface, a side surface and a bottom surface, and the groove is formed in the top surface, and/or the side surface, and/or the bottom surface of the metal outer frame.

Preferably, the metal outer frame is made of metal, metal alloy or a single or composite material with metal characteristics, and the antenna radiation sheet is made of metal, metal alloy or a single or composite material with metal characteristics.

Preferably, a gap is formed between the outer peripheral side surface of the antenna column close to the antenna radiation piece body and the filling plastic.

The invention also provides a preparation process of the multiple injection molding antenna, which comprises the following steps:

step 1: connecting the filling plastic with the metal outer frame through injection molding, wherein the filling plastic partially fills the groove of the metal outer frame;

step 2: and mounting the antenna radiation piece in the groove, and fixing the antenna radiation piece to the metal outer frame by injection molding again.

Preferably, when the floating metal sheet is provided, the method further includes the step 11: and (2) through injection molding, wrapping the floating metal sheet by the filling plastic, and installing the filling plastic wrapping the floating metal sheet in the groove in the step (1). Thesteps 1 and 11 are not limited in sequence, and may be performed simultaneously, or may be performed first.

Preferably, the filling plastic is provided with a limiting convex rib for mounting the antenna radiation sheet in a forming manner.

Compared with the prior art, the invention has the following beneficial effects:

the metal outer frame is provided with a plurality of grooves for placing the antenna radiating sheets, so that the antenna is directly arranged on the metal outer frame, the interference of the metal outer frame on the antenna is avoided due to the isolation of the filled plastic, and meanwhile, the filled plastic also accurately positions the antenna; the antenna can be directly arranged on the outermost side of communication equipment (such as a mobile phone), so that the interference of the metal outer frame on the antenna is avoided, and various radio frequency indexes of the 5G antenna are achieved; breaks through the limitation of metal appearance and realizes the perfect combination of the appearance of the metal frame and the sky.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

Fig. 1 is a schematic perspective view of a multi-shot antenna according toembodiment 1 of the present invention;

fig. 2 is a structural sectional view at an antenna radiation sheet ofembodiment 1 of the present invention;

FIG. 3 is a schematic view of the antenna radiator of FIG. 2, shown disassembled with filled plastic;

FIG. 4 is a schematic view of a process for forming the antenna radiator of FIG. 3;

fig. 5 is a structural sectional view at an antenna radiation piece ofembodiment 3 of the present invention;

FIG. 6 is a schematic view of the antenna radiator of FIG. 5, shown in exploded form and filled with plastic;

FIG. 7 is another exploded view of the filled plastic of the antenna radiator of FIG. 5;

fig. 8 is a schematic view of a process for forming the antenna radiator of fig. 7.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In practice, the invention will be understood to cover all modifications and variations of this invention provided they come within the scope of the appended claims.

For a better illustration of the invention, the following detailed description of the invention is given in conjunction with the accompanying drawings.

Example 1

A multi-time injection molding antenna is shown in figures 1 and 2, and combined with figure 4, and comprises a plurality ofantenna radiating sheets 2, a metalouter frame 1 and fillingplastic 3;

theantenna radiation piece 2 comprises an antenna radiation piece body 201 and an antenna column 202 which is arranged below the antenna radiation piece body 201 and connected with the antenna radiation piece body; one end of the antenna column 202 is connected with the antenna radiation piece body 201, and the free end is connected with the PCBA 5;

a plurality of grooves 101 are formed in the metalouter frame 1 and used for placing theantenna radiation piece 2, a first through hole 102 is formed in the bottom of each groove, and the free end of the antenna column 202 of theantenna radiation piece 2 penetrates through the first through hole 102 to be connected with the PCBA 5;

part of the fillingplastic 3 fills the groove 101, a first mounting position 301 matched with theantenna radiation sheet 2 is arranged at the filling position, theantenna radiation sheet 2 is arranged in the first mounting position 301, and the first mounting position 301 enables theantenna radiation sheet 2 to be fixedly arranged in the groove 101 and can accurately control the mounting position of theantenna radiation sheet 2; part of the filledplastic 3 is filled in the groove, so that the filled plastic partially wraps the antenna radiation sheet, and the antenna radiation sheet is isolated from the metal outer frame; the upper surface of the antenna radiation piece body is not shielded by the filling plastic.

Furthermore, the upper surface of the antenna radiation piece body and the upper surface of the filling plastic are flush with the surface of the metal outer frame.

The PCBA 5 is connected to the antenna radiator using conventional connection methods including, but not limited to, SMT, spring connection.

In this embodiment, the metalouter frame 1 is provided with a plurality of grooves 101 for placing theantenna radiation sheet 2, so that the antenna can be directly arranged on the metal outer frame, the isolation of the filled plastic avoids the interference of the metal outer frame on the antenna, and meanwhile, the first mounting position 301 arranged on the filled plastic also accurately positions the antenna; the antenna can be directly arranged on the outermost side of communication equipment (such as a mobile phone), so that the interference of the metal outer frame on the antenna is avoided, and various radio frequency indexes of the 5G antenna are achieved; breaks through the limitation of metal appearance and realizes the perfect combination of the appearance of the metal frame and the sky.

Furthermore, the metal outer frame is of an integrally formed structure and comprises a top surface, a side surface and a bottom surface, and the groove is formed in the top surface, and/or the side surface, and/or the bottom surface of the metal outer frame. Theantenna radiation piece 2 can be arranged on any part of the metal frame such as the top part and two side surfaces of the mobile phone. The number of the antenna radiation pieces is not fixed, and the antenna radiation pieces can be adjusted according to actual needs.

Furthermore, the metal outer frame is made of metal, metal alloy or a single or composite material with metal characteristics, and the antenna radiation sheet is made of metal, metal alloy or a single or composite material with metal characteristics.

Furthermore, a gap is formed between the peripheral side face of the antenna column close to the antenna radiation piece body and the filling plastic.

The shape of theantenna radiation sheet 2 can be any irregular shape such as circle, rectangle, square, diamond and others. The filledplastic 3 may have any irregular shape such as a circle, a rectangle, a square, a diamond, etc.

The following describes a manufacturing process of the multi-shot antenna in this embodiment with reference to fig. 3 to 4.

As shown in fig. 3, the filledplastic 3 can be split into two parts, namely, partially filledplastics 311 and 312. Wherein theglue opening 313 is located on the partially filledplastic 312.

Fig. 4 illustrates the overall manufacturing process of the multiple injection molded antenna, including the following steps:

step 1: connecting the filling plastic with the metal outer frame through injection molding, wherein the filling plastic partially fills the groove of the metal outer frame; firstly, plastic 311 is filled in the injection molding filling part of themetal frame 1; the partially filledplastic 311 is provided with a limiting convex rib and a limiting hole in a forming manner, the limiting convex rib is formed to be matched with the antenna radiation sheet at the first installation position 301 for installation

Step 2: mounting the antenna radiation piece in the groove, and performing injection molding again, wherein the groove is filled with the filling plastic; the antenna radiation plate is mounted on the first mounting position 301 of the partially filledplastic 311, and then the partially filledplastic 312 is injection molded.

Theglue openings 313 can then be partially removed by machining.

The antenna and the metal frame are combined through multiple times of injection molding and positioning of the antenna.

The injection molding mentioned in this patent is an injection molding method in the prior art, and may be common plastic injection molding or nano injection molding, which is not limited herein.

Example 2

Referring to fig. 5, the present embodiment is different fromembodiment 1 in that a floatingmetal sheet 4 is further included.

A multi-time injection molding antenna comprises a plurality ofantenna radiating sheets 2, a metalouter frame 1 and fillingplastic 3;

theantenna radiation piece 2 comprises an antenna radiation piece body 201 and an antenna column 202 which is arranged below the antenna radiation piece body 201 and connected with the antenna radiation piece body; one end of the antenna column 202 is connected with the antenna radiation piece body 201, and the free end is connected with the PCBA 5;

a plurality of grooves 101 are formed in the metalouter frame 1 and used for placing theantenna radiation piece 2, a first through hole 102 is formed in the bottom of each groove, and the free end of the antenna column 202 of theantenna radiation piece 2 penetrates through the first through hole 102 to be connected with the PCBA 5;

a second throughhole 401 is formed in the floatingmetal sheet 4, and the antenna column 202 of theantenna radiation sheet 2 passes through the second throughhole 401; part of the fillingplastic 3 fills the groove 101, a third throughhole 303 matched with a free end of the antenna radiation piece is arranged at a filling position, part of the fillingplastic 3 wraps the floatingmetal piece 4 and remains the second throughhole 401, asecond installation position 302 matched with the antenna radiation piece is formed and arranged at the same time when the filling plastic wraps the floatingmetal piece 4, the antenna column of the antenna radiation piece passes through thesecond installation position 302, the second throughhole 401 and the third throughhole 303 to be connected with the PCBA 5, and the filling plastic accurately positions theantenna radiation piece 2 and the floatingmetal piece 4 through thesecond installation position 302, the second throughhole 401 and the third throughhole 303; part of the fillingplastic 3 is filled in the groove 101, so that theantenna radiation sheet 2, the floatingmetal sheet 4 and the metalouter frame 1 are isolated from each other; the upper surface of the antenna radiation piece body is not shielded by the filling plastic. The mutual isolation of theantenna radiation sheet 2, the floatingmetal sheet 4 and the metalouter frame 1 means that theantenna radiation sheet 2 is isolated from the floatingmetal sheet 4, theantenna radiation sheet 2 is isolated from the metalouter frame 1, and the floatingmetal sheet 4 is isolated from the metalouter frame 1.

Furthermore, the upper surface of the antenna radiation piece body and the upper surface of the filling plastic are flush with the surface of the metal outer frame.

In this embodiment, the metalouter frame 1 is provided with a plurality of grooves 101 for placing theantenna radiation sheet 2 and the floatingmetal sheet 4, so that the antenna can be directly arranged on the metal outer frame, the isolation of the filling plastic avoids the interference of the metal outer frame on the antenna and the floating metal sheet, and meanwhile, the first mounting position 301 arranged on the filling plastic also accurately positions the antenna and the floating metal sheet; the antenna can be directly arranged on the outermost side of communication equipment (such as a mobile phone), so that the interference of the metal outer frame on the antenna is avoided, and various radio frequency indexes of the 5G antenna are achieved; breaks through the limitation of metal appearance and realizes the perfect combination of the appearance of the metal frame and the sky.

Furthermore, the metal outer frame is of an integrally formed structure and comprises a top surface, a side surface and a bottom surface, and the groove is formed in the top surface, and/or the side surface, and/or the bottom surface of the metal outer frame. Theantenna radiation piece 2 can be arranged on any part of the metal frame such as the top part and two side surfaces of the mobile phone. The number of the antenna radiation pieces is not fixed, and the antenna radiation pieces can be adjusted according to actual needs.

Furthermore, the metal outer frame is made of metal, metal alloy or a single or composite material with metal characteristics, and the antenna radiation sheet is made of metal, metal alloy or a single or composite material with metal characteristics.

Furthermore, a gap is formed between the peripheral side face of the antenna column close to the antenna radiation piece body and the filling plastic.

The shape of theantenna radiation sheet 2 can be any irregular shape such as circle, rectangle, square, diamond and others. The filledplastic 3 may have any irregular shape such as a circle, a rectangle, a square, a diamond, etc.

The following describes a manufacturing process of the multi-shot antenna in this embodiment with reference to fig. 6 to 8.

The floating metal elastic sheet and the antenna radiating sheet are only contacted with the filling plastic. During the plastic injection molding process, it is difficult to position them. The filledplastic 3 is divided into three parts, namely a first filledplastic 316, a second filledplastic 317 and a thirdfilled plastic 318. Fig. 6 and 7 show two different ways of removing the floating metal sheet, respectively, and theglue ports 319 and 319' are the locations for filling the injection molding glue ports three times.

Fig. 8 depicts the entire fabrication of fig. 7, the process for making the multiple injection molded antenna, including the steps of:

step 1: connecting the filling plastic with the metal outer frame through injection molding, wherein the filling plastic partially fills the groove of the metal outer frame; namely, themetal frame 1 and the fillingplastic 316 are injected together, and a third throughhole 303 is formed at the moment;

step 11: the floatingmetal sheet 4 is provided with a second throughhole 401, the filling plastic 317 wraps the floating metal sheet through injection molding, and during filling, a limiting convex rib is formed on the fillingplastic 317, forms thesecond mounting position 302 matched with the antenna radiation sheet, and meanwhile, the second throughhole 401 is reserved; thestep 1 and the step 11 are not limited in sequence, and can be carried out simultaneously or any one of the steps can be carried out firstly; injection molding the floatingmetal sheet 4 and the filling plastic 317 together;

step 2: installing the filling plastic 317 wrapping the floatingmetal sheet 4 in the groove in thestep 1, installing the antenna radiation sheet in the groove through thesecond installation position 302, the second throughhole 401 and the third throughhole 303, and performing injection molding again, wherein the groove is filled with the filling plastic.

The glue flap portion may then be removed by machining.

This application realizes the technology that antenna and metal frame combine through moulding plastics many times, location antenna, floating metal sheet.

The injection molding mentioned in this patent is an injection molding method in the prior art, and may be common plastic injection molding or nano injection molding, which is not limited herein.

And in the second step, the injection-moldedantenna radiating pieces 4 and 7 and theantenna radiating piece 2 are installed in themetal frame 1 together. After injection molding, the glue hole 10 is removed by machining.

The structure injection molding process in fig. 6 is similar to that of fig. 7, except that the glue gate location is different in the last injection. And will not be described in detail herein.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (9)

1. A multi-time injection molding antenna is characterized by comprising a plurality of antenna radiating sheets, a metal outer frame and filling plastic;

the antenna radiation piece comprises an antenna radiation piece body and an antenna column which is arranged below the antenna radiation piece body and connected with the antenna radiation piece body;

a plurality of grooves are formed in the metal outer frame and used for placing the antenna radiation pieces, first through holes are formed in the bottoms of the grooves, and the free ends of the antenna columns of the antenna radiation pieces penetrate through the first through holes to be connected with the PCBA;

part of the filling plastic is filled in the groove, a first mounting position matched with the antenna radiation sheet is arranged at the filling position, and the antenna radiation sheet is arranged in the first mounting position, so that the antenna radiation sheet is fixedly arranged in the groove; part of the filled plastic is filled in the groove, and the filled plastic partially wraps the antenna radiating sheet, so that the antenna radiating sheet is isolated from the metal outer frame;

the upper surface of the antenna radiation piece body is not shielded by the filling plastic.

2. The multiple-injection-molding antenna according to claim 1, further comprising a floating metal plate, wherein a second through hole is disposed on the floating metal plate, and the antenna column of the antenna radiation sheet passes through the second through hole; part of the filling plastic fills the groove, and a third through hole matched with the free end of the antenna radiation piece is arranged at the filling position; part of the filling plastic wraps the floating metal sheet and the second through hole is reserved, and a second mounting position matched with the antenna radiation sheet is formed and arranged at the same time when the filling plastic wraps the floating metal sheet; the antenna column of the antenna radiation piece passes through a second mounting position, the second through hole and a third through hole to be connected with the PCBA, and the filling plastic cement accurately positions the antenna radiation piece and the floating metal piece through the second mounting position, the second through hole and the third through hole; part of the filled plastic is filled in the groove, so that the antenna radiation sheet, the floating metal sheet and the metal outer frame are isolated from each other; the upper surface of the antenna radiation piece body is not shielded by the filling plastic.

3. The multiple-injection-molding antenna according to claim 1 or 2, wherein the upper surface of the antenna radiation piece body and the upper surface of the filling plastic are flush with the surface of the metal frame.

4. The multiple-injection-molding antenna according to claim 1 or 2, wherein the metal frame is an integrally-molded structure and comprises a top surface, a side surface and a bottom surface, and the groove is disposed on the top surface, and/or the side surface, and/or the bottom surface of the metal frame.

5. The multiple-injection-molding antenna according to claim 1 or 2, wherein the metal frame is made of metal, metal alloy or a single or composite material with metal characteristics, and the antenna radiation sheet is made of metal, metal alloy or a single or composite material with metal characteristics.

6. The multiple-injection-molding antenna according to claim 1 or 2, wherein a gap is provided between the outer circumferential side of the antenna column near the antenna radiation sheet body and the filling plastic.

7. A process for manufacturing a multiple-shot antenna as claimed in any one of claims 1 to 6, comprising the steps of:

step 1: connecting the filling plastic with the metal outer frame through injection molding, wherein the filling plastic partially fills the groove of the metal outer frame;

step 2: and mounting the antenna radiation piece in the groove, and fixing the antenna radiation piece to the metal outer frame by injection molding again.

8. The process for manufacturing a multiple-shot antenna according to claim 7, wherein the floating metal sheet is provided, further comprising step 11: and (2) through injection molding, wrapping the floating metal sheet by the filling plastic, and installing the filling plastic wrapping the floating metal sheet in the groove in the step (1).

9. The manufacturing process of the multiple injection molding antenna according to claim 7 or 8, wherein a limiting rib is formed on the filling plastic for mounting the antenna radiation sheet.

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