CN117156032A - Insert molding, center, electronic device, and insert molding method - Google Patents

Abstract

The application discloses an insert molding product, a middle frame, electronic equipment and an insert molding method. The number of the embedded parts is multiple, the embedded parts are arranged at intervals, and gaps are formed between two adjacent embedded parts. The filling piece is arranged in the gap. The plastic matrix is wrapped outside the insert and the filler. According to the insert molding product provided by the application, the filling piece is arranged in the gap between the inserts, the gap is filled by the filling piece, then the plastic matrix is wrapped outside the inserts and the filling piece, so that the situation that a large number of plastic matrixes enter the gap to cause a large range of thickness drop of the plastic matrix is avoided, the distribution uniformity of the plastic matrixes on the insert molding product is improved, the plastic matrixes on each part of the insert molding product can shrink inwards at approximately the same shrinkage rate, and the problem of shrinkage mark defects on the surface of the insert molding product is further solved.

Description

Insert molded products, mid-frames, electronic devices, and insert molding methods

Technical field

The present application relates to the technical field of insert molded products, and more specifically, to an insert molded product, a middle frame, an electronic device, and an insert molding method.

Background technique

In electronic devices such as mobile phones, the insert molding process is usually used to make the middle frame and antenna into an integrated structure. This can reduce the overall size of the antenna and middle frame, and also makes the subsequent mobile phone assembly process easier. At present, the industry's technical route for embedding antennas into the mid-frame is to directly install pre-processed metal antennas into the molding mold of the mid-frame, and then inject molten liquid plastic. After the plastic in the mold cools and solidifies, it is tightly joined to the antenna. At the same time, an integrated antenna and mid-frame insert molding is made.

Plastic will naturally shrink during the cooling process. The thicker plastic parts and thinner plastic parts on the middle frame will collapse inward unevenly due to different shrinkage rates. As a result, some concavities will appear on the surface of the middle frame. This phenomenon is called shrinkage phenomenon, and this mark is called shrinkage mark or shrinkage mark. In order to reduce the impact of shrinkage or sink marks on the appearance of the middle frame, related technologies improve this problem by increasing the holding pressure of the mold. The principle is to increase the density of the plastic and reduce the degree of inward collapse of the plastic during shrinkage.

However, current mobile phone antennas usually consist of multiple antenna radiating branches arranged at intervals. Since the gaps between the antenna radiating branches only contain plastic and no metal, the thickness of the plastic in the gap is larger than the thickness of the plastic on both sides. In addition, the linear expansion coefficients of plastic and metal are different, causing the plastic to shrink more seriously at the gap. The shrinkage or shrinkage marks on the middle frame will be particularly obvious. This problem cannot be improved by conventionally increasing the holding pressure of the mold. .

Contents of the invention

The purpose of this application is to provide an insert molded product, a middle frame, an electronic device, and an insert molding method. By arranging a filler in the gap between the inserts, the filler occupies the gap, and then the filler is used to occupy the gap. A plastic matrix is wrapped around the insert molded product, thereby improving the uniformity of the plastic matrix distribution on the insert molded product, allowing the plastic matrix everywhere on the insert molded product to shrink evenly at approximately the same shrinkage rate, thereby improving the insert molded product. The surface has sink mark defects.

In a first aspect, the present application provides an insert molded product, including an insert, a filler and a plastic matrix.

The number of the embedded parts is multiple, and the plurality of embedded parts are arranged at intervals, and there is a gap between two adjacent embedded parts.

The filling piece is arranged in the gap.

The plastic matrix is wrapped around the outside of the embedded part and the filling part.

In the insert molded product provided by this application, a filler is provided in the gap between the inserts, and the gap is filled with the filler, and then a plastic matrix is wrapped around the insert and the filler. Since the filling piece occupies the space in the gap, it avoids a large amount of plastic matrix entering the gap and causing a large range of thickness differences in the plastic matrix, thus improving the uniformity of the distribution of the plastic matrix on the insert molded product. This allows the plastic matrix everywhere on the insert molded product to shrink inward at approximately the same shrinkage rate, thus improving the sink mark defect problem on the surface of the insert molded product.

In a possible design, two ends of the filling piece respectively offset two adjacent embedded pieces.

In a possible design, two ends of the filling piece are respectively connected to two adjacent embedded pieces.

In a possible design, the filling piece is provided with connecting parts at both ends, and the filling piece is connected to the embedded piece through the connecting parts.

In a possible design, the connecting portion is provided with a slot for the insert to be inserted, and the insert is inserted into the filler through the slot.

In a possible design, the connecting part and the insert are also connected through a limiting structure.

In a possible design, the limiting structure includes a through hole and a protruding column, one of the connecting part and the insert is provided with the through hole, and the other is provided with the protruding column.

In one possible design, the end of the insert adjacent to the gap has a flat tail-shaped structure, the through hole is opened in the flat tail-shaped structure, and the protruding pillar is arranged in the slot. .

In a possible design, the limiting structure includes a groove and a convex block, one of the connecting part and the insert is provided with the groove, and the other is provided with the convex block.

In one possible design, the groove is an annular through groove provided on the outer periphery of the insert, and the protrusion is annular and provided on a groove wall of the slot.

In one possible design, the filling piece is detachably disposed in the gap, and the plastic base is provided with an opening through which the filling piece can leak out, so that the filling piece can pass through the opening. Move out.

In one possible design, the surface of the insert is provided with knurled structures, concave points or convex points.

In a possible design, the cross section of the filling piece is larger than or equal to the cross section of the insert piece.

In a possible design, the plastic matrix is made of polycarbonate, polypropylene, polyvinyl chloride, polyformaldehyde, polyurethane, polyethylene terephthalate, and polybutylene terephthalate. , one or more of ethylene-vinyl acetate copolymers.

In a second aspect, the present application provides a middle frame, including the above-mentioned insert molding, where the insert includes an antenna radiation branch.

In the middle frame provided by this application, a filling piece is provided in the branch gap between the antenna radiating branches, and the branch gap is filled with the filling piece, and then a plastic matrix is wrapped around the antenna radiating branches and the filling piece. Since the filling piece occupies the space in the branch gaps, it avoids a large amount of plastic matrix entering into the branch gaps and causing a large range of thickness differences in the plastic matrix. This improves the uniformity of the distribution of the plastic matrix on the middle frame. This allows the plastic matrix everywhere on the middle frame to shrink inward at approximately the same shrinkage rate, thereby improving the problem of sink mark defects on the surface of the middle frame.

In addition, in related technologies, in order to avoid shrinkage problems in the parts of the middle frame corresponding to the branch gaps, the width of the branch gaps is strictly limited. Usually, the width of the branch gaps cannot be greater than 0.8mm. Since the size of the branch gap can be used to adjust the resonant frequency and bandwidth of the antenna, the size-constrained branch gap will impose restrictions on antenna performance debugging and antenna structure optimization. In this application, the sink mark problem is solved by arranging fillers in the branch gaps. Therefore, constraints and restrictions on the size of the branch gaps can be avoided, thereby making the antenna performance debugging more flexible and the structure optimization more convenient.

In a third aspect, this application provides an electronic device, including the above-mentioned middle frame.

The electronic equipment provided by this application includes the above-mentioned middle frame. Fillers are provided in the branch gaps between the antenna radiation branches of the middle frame. The fillers occupy the branch gaps to prevent a large amount of plastic matrix from entering the branch gaps and improve the efficiency of the middle frame. This improves the uniformity of the distribution of the plastic matrix on the middle frame, allowing the plastic matrix everywhere on the middle frame to shrink inward at approximately the same shrinkage rate, thus improving the problem of sink mark defects on the surface of the middle frame. In addition, in this application, fillers are provided in the branch gaps to solve the sink mark problem. Therefore, constraints and restrictions on the size of the branch gaps can be avoided, thereby making antenna performance debugging more flexible and structural optimization more convenient.

In the fourth aspect, this application provides an insert molding method, including:

Provide embedded parts, the number of the embedded parts is multiple, the plurality of embedded parts are arranged at intervals, and there is a gap between two adjacent embedded parts;

Arrange the filling piece in the gap;

Place the insert and the filling piece into the first mold;

Injecting a first plastic material into the first mold to form a plastic matrix joined to the insert and the filler;

After the plastic matrix is cooled and solidified, the mold is demoulded to obtain an insert molded product.

The insert molding method provided by this application prevents a large amount of plastic matrix from entering the gap and causing a large thickness difference in the plastic matrix by arranging fillers in the gaps between the insert parts, thus improving the quality of the insert molded products. The uniform distribution of the plastic matrix on the insert molded product allows the plastic matrix everywhere on the insert molded product to shrink inward at approximately the same shrinkage rate, thereby improving the sink mark defect problem on the surface of the insert molded product.

In a possible design, the step of arranging a filling piece in the gap includes:

Place the portion of the insert adjacent to the gap into the second mold;

A second plastic material is injected into the second mold to form the filling piece that engages the insert and fills the gap.

In one possible design, the step of placing the part of the insert adjacent to the gap into the second mold also includes:

A rubberized structure is made on the part of the insert adjacent to the gap.

In a possible design, the step of arranging a filling piece in the gap includes:

Provide filler pieces;

The filling piece is placed in the gap and fixedly connected with the embedded piece.

Description of the drawings

Figure 1 is a schematic diagram of a middle frame in the related art;

Figure 2 is a cross-sectional view along A-A in Figure 1;

Figure 3 is an enlarged view of B in Figure 2;

Figure 4 is an enlarged view of C in Figure 2;

Figure 5 is a schematic diagram of a smart phone provided by an embodiment of the present application;

Figure 6 is a schematic diagram of a middle frame provided by an embodiment of the present application;

Figure 7 is an exploded view of the middle frame in Figure 6;

Figure 8 is a cross-sectional view along D-D in Figure 6;

Figure 9 is an enlarged view of an example at E in Figure 8;

Figure 10 is an enlarged view of another example at E in Figure 8;

Figure 11 is an enlarged view of another example at E in Figure 8;

Figure 12 is a schematic diagram of an example of the insert and filler provided by the embodiment of the present application;

Figure 13 is an enlarged view of another example at E in Figure 8;

Figure 14 is a schematic diagram of another example of the insert and filler provided by the embodiment of the present application;

Figure 15 is an enlarged view of another example at E in Figure 8;

Figure 16 is a schematic diagram of another example of the insert and filler provided by the embodiment of the present application;

Figure 17 is a schematic diagram of the insert and filler in Figure 16 after they are connected;

Figure 18 is a schematic diagram of another example of the insert and filler provided by the embodiment of the present application;

Figure 19 is an enlarged view of another example at E in Figure 8;

Figure 20 is a schematic diagram of another example of the insert and filler provided by the embodiment of the present application;

Figure 21 is a schematic diagram of the insert and filler in Figure 20 after they are connected;

Figure 22 is a schematic diagram of another example of the insert and filler provided by the embodiment of the present application;

Figure 23 is a partial schematic diagram of the middle frame provided by the embodiment of the present application;

Figure 24 is a flow chart of an example of the insert molding method provided by the embodiment of the present application;

Figure 25 is a flow chart of another example of the insert molding method provided by the embodiment of the present application;

Figure 26 is a schematic diagram of an example of the insert molding method provided by the embodiment of the present application;

Figure 27 is a flow chart of another example of the insert molding method provided by the embodiment of the present application;

Figure 28 is a schematic diagram of another example of the insert molding method provided by the embodiment of the present application;

Figure 29 is a flow chart of another example of the insert molding method provided by the embodiment of the present application;

Figure 30 is a schematic diagram of another example of the insert molding method provided by the embodiment of the present application.

Reference signs:

10. Embedded parts; 11. Gap; 12. Flat tail structure;

20. Filling piece; 21. Connection part; 211. Slot;

30. Plastic matrix; 31. Opening;

40. Limiting structure; 41. Groove; 42. Bump; 43. Through hole; 44. Projecting column;

50. Adhesive; 60. First mold; 70. Second mold;

100. Middle frame; 200. Antenna radiation branches; 201. Gaps in branches; 300. Sink marks; 400. Display screen.

Detailed ways

The following is an exemplary introduction to relevant content that may be involved in the embodiments of this application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be mechanical connection, electrical connection or mutual communication; it can be direct connection, or indirect connection through an intermediary, it can be internal connection of two elements or interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the description of this application, it should be understood that the terms "upper", "lower", "side", "inner", "outer", "top", "bottom", etc. indicate an orientation or positional relationship based on the installation The orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. .

It should also be noted that in the embodiments of the present application, the same reference numerals refer to the same components or components. For the same components in the embodiments of the present application, only one of the parts or components may be labeled as an example in the figure. mark, it should be understood that the same reference marks apply to other identical parts or components.

In the description of this application, it should be noted that the term "and/or" is only an association relationship describing associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: existing alone A, A and B exist at the same time, and B alone exists.

To facilitate understanding, the technical terms involved in this application are first explained and described below.

The coefficient of linear expansion, sometimes called linear expansivity, indicates the extent to which a material expands or contracts. It is specifically defined as the elongation per unit length of a solid material when its temperature increases by 1°C.

In electronic devices such as mobile phones, the insert molding process is usually used to make the middle frame and antenna into an integrated structure, which can reduce the overall size of the antenna and middle frame, and also make the subsequent mobile phone assembly process easier. Among them, the conventional insert molding process is to install the insert in the cavity with the mold open, and then close the mold for injection molding.

At present, the industry's technical route for embedding antennas into the mid-frame is to directly install pre-processed metal antennas into the molding mold of the mid-frame, and then inject molten liquid plastic. After the plastic in the mold cools and solidifies, it is tightly joined to the antenna. Together, an integrated antenna and mid-frame insert molding is produced.

Plastic will naturally shrink during the cooling process. The thicker plastic parts and thinner plastic parts on the middle frame will collapse inward unevenly due to different shrinkage rates. As a result, some concavities will appear on the surface of the middle frame. This phenomenon is called shrinkage phenomenon, and this mark is called shrinkage mark or shrinkage mark. In order to reduce the impact of shrinkage or sink marks on the appearance of the middle frame, related technologies improve this problem by increasing the holding pressure of the mold. The principle is to increase the density of the plastic and reduce the degree of inward collapse of the plastic during shrinkage.

FIG. 1 is a schematic diagram of a middle frame 100 in the related art. FIG. 2 is a cross-sectional view along line A-A in FIG. 1 .

As shown in Figures 1 and 2, current mobile phone antennas usually consist of multiple antenna radiating branches 200 arranged at intervals, and feed points and grounding points (not shown in the figure) that are electrically connected to the antenna radiating branches 200. Adjacent There is a branch gap 201 between the antenna radiating branches 200. By changing the size of the branch gap 201, the resonant frequency and bandwidth of the antenna can be adjusted. The mobile phone antenna is wrapped by a plastic base 30. Since the branch gaps 201 between the antenna radiation branches 200 only have plastic and no metal, the thickness of the plastic in the branch gaps 201 is greater than that of other plastic parts with metal. In addition, the linear expansion coefficients of plastic and metal are different, causing the plastic in the branch gap 201 to significantly shrink during the cooling process, resulting in a greater degree of collapse, which will form deep shrinkage or sink marks on the surface of the middle frame 100 300, this problem cannot be improved by conventionally increasing the holding pressure of the mold.

Figure 3 is an enlarged view of point B in Figure 2. Figure 4 is an enlarged view of point C in Figure 2.

As shown in FIG. 3 , there is only a plastic matrix 30 in the branch gap 201 between the two antenna radiation branches 200 , so the plastic thickness in this part is greater than the plastic thickness on both sides. During the cooling process of the plastic after injection molding, the plastic in the branch gaps 201 shrinks severely, resulting in obvious collapse on the outside of the middle frame 100, and the shrink marks 300 are very deep.

In contrast, as shown in Figure 4, in areas without branch gaps 201, since the plastic thickness on the surface of the antenna radiation branches 200 is approximately the same, there is no large difference in plastic thickness. Therefore, by increasing the holding pressure of the mold, the plastic thickness can be ensured. It can shrink evenly without obvious collapse on the outside of the middle frame 100 .

It can be seen that the insert molding products in the related art do not have a good solution to the sink marks 300 generated at the branch gaps 201 between the antenna radiation branches 200 .

In view of this, in order to solve the above technical problems, the present application provides an insert molded product, a middle frame 100, an electronic device, and an insert molding method. By arranging a filler in the gap between the inserts, the filler The gap is occupied, and then the plastic matrix 30 is wrapped around the gap, thereby improving the uniformity of the plastic matrix 30 everywhere on the insert-molded product, so that the plastic matrix 30 everywhere on the insert-molded product can be arranged in approximately the same manner. The shrinkage rate is uniform, thereby improving the problem of sink mark 300 defects on the surface of insert molded products.

Embodiments of the present application first provide an electronic device, which may also be called a mobile device, a terminal device, a mobile terminal, or a terminal. This electronic device includes, but is not limited to, a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing device connected to a wireless modem. For example, electronic devices may include smart watches, smart wristbands, earphones, personal digital assistant (PDA) computers, tablet computers, laptop computers, Vehicle-mounted computers, smart glasses, pedometers, two-way radios, and other electronic devices that have a middle frame 100 and an antenna and require insert molding of the two into an integrated structure.

In order to more conveniently explain the electronic device provided by the embodiments of the present application, as an example rather than a limitation, the technical solution of the present application will be explained in detail below by taking the electronic device as a smartphone as an example. Figure 5 is a schematic diagram of a smart phone provided by an embodiment of the present application.

As shown in FIG. 5 , the smart phone provided by the embodiment of the present application includes a display screen 400 and a casing. The casing further includes a middle frame 100 and a back cover. The middle frame 100 has a hollow ring-shaped structure. The display screen 400 is fixed on the front end of the middle frame 100 , and the back cover is fixed on the rear end of the middle frame 100 . The display screen 400, the middle frame 100 and the back cover jointly define an accommodation space for the smartphone. This accommodation space is used to install various functional components of the smartphone, such as the speaker module, battery, microphone, and processor in the embodiments described below. device and other functional components.

In the embodiment of the present application, the cross-sectional shape of the middle frame 100 (corresponding to the shape of the display screen 400 and the back cover) is a rectangle, a square, a track shape, an ellipse, etc. The middle frame 100 provides mechanical support and protection for the entire smartphone. The middle frame 100 is made of a plastic matrix 30 with sufficient hardness, such as polycarbonate, polypropylene, etc. For more detailed description, please refer to the embodiments described later.

The back cover covers the rear end surface of the middle frame 100 and can be made of stainless steel, titanium alloy, glass, ceramics, aluminum alloy, copper alloy, plastic and other materials.

Optionally, the back cover can be covered on the middle frame 100 by screwing, snapping, bonding, etc., and a sealing ring can be provided between the back cover and the middle frame 100 to improve the joint between the back cover and the middle frame 100 Sealing and waterproofing effect. The sealing ring can be made of highly elastic materials such as silicone or rubber.

In addition, the smartphone can also include: a processor, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, a microphone, a mobile communication module, an antenna, a wireless communication module, an audio module, and a headset. Functional components such as interfaces, sensor modules, buttons, cameras, and subscriber identification module (SIM) card interfaces.

These functional elements can be changed according to user needs. It can be understood that the specific embodiment introduced above is only a specific implementation mode of the present application, and other ways to implement the solution of the present application are also within the scope of protection of the present application. , will not be described in detail here.

The insert molded product, the middle frame 100, the electronic device and the insert molding method provided by the present application will now be described in detail with reference to the accompanying drawings.

In order to more conveniently explain the insert molded product provided by the embodiment of the present application, as an example rather than a limitation, the technical solution of the present application will be explained in detail below by taking the insert molded product being the middle frame 100 of a smartphone as an example.

Of course, in other embodiments, the insert molded product can also be the middle frame of a smart bracelet, the casing of an earphone, the middle frame of a personal digital assistant computer, the middle frame of a tablet computer, or the middle frame of a laptop computer. , the middle frame of car computers, the casing of smart glasses, the middle frame of pedometers, the casing of walkie-talkies, etc.

In addition, in other embodiments, the insert-molded product may also be other components that require the insert 10 and the plastic base 30 to be insert-molded into an integrated structure. For example, the insert molded product is a computer main case, and the insert 10 is a nut, a buckle groove, etc. arranged at intervals. The nuts and buckle grooves are used to assemble the main case. In order to avoid sink marks 300 on the outside of the main case, this invention can also be used. Apply the provided insert molding method for manufacturing.

FIG. 6 is a schematic diagram of the middle frame 100 provided by the embodiment of the present application. FIG. 7 is an exploded view of the middle frame 100 in FIG. 6 . FIG. 8 is a cross-sectional view along D-D in FIG. 6 . FIG. 9 is an enlarged view of an example at E in FIG. 8 .

As shown in FIGS. 6 to 9 , an intermediate frame 100 provided by an embodiment of the present application includes an insert 10 , a filler 20 and a plastic matrix 30 .

The number of embedded parts 10 is multiple. The plurality of embedded parts 10 are arranged at intervals, and there is a gap 11 between two adjacent embedded parts 10 . The embedded component 10 is the antenna radiation branch 200 , and the gap 11 is the branch gap 201 .

The filling piece 20 is disposed in the gap 11 .

The plastic matrix 30 is wrapped around the insert 10 and the filler 20 .

The middle frame 100 provided in the embodiment of the present application is provided with a filler 20 in the branch gap 201 between the antenna radiating branches 200. The filler 20 fills the branch gap 201, and then the antenna radiating branch 200 and the filler are filled. The outer package 20 is provided with a plastic matrix 30 . Since the filling piece 20 occupies the space in the branch gap 201, it avoids a large amount of plastic matrix 30 entering into the branch gap 201 and causing a large range of thickness difference in the plastic matrix 30, thereby improving the thickness of the plastic matrix on the middle frame 100. 30 is distributed uniformly, so that the plastic matrix 30 on the middle frame 100 can shrink inward at approximately the same shrinkage rate, thereby improving the problem of sink marks 300 defects on the surface of the middle frame 100 .

In addition, in the related technology, in order to avoid the sink mark 300 problem in the part corresponding to the branch gap 201 on the middle frame 100, the width of the branch gap 201 will be strictly limited. Usually, the width of the branch gap 201 cannot be greater than 0.8 mm. As mentioned above, the size of the branch gap 201 can be used to adjust the resonant frequency and bandwidth of the antenna, but the size constrained branch gap 201 will impose restrictions on antenna performance debugging and antenna structure optimization. In this application, the problem of sink marks 300 is solved by arranging the filler 20 in the branch gap 201. Therefore, constraints and restrictions on the size of the branch gap 201 can be avoided, thereby making the antenna performance debugging more flexible and the structure optimization more convenient.

In addition, the material of the filler 20 can be different from the material of the plastic matrix 30. Therefore, the dielectric constant can be changed by selecting the material of the filler 20, which is beneficial to the performance debugging of the wire.

Optionally, in other embodiments provided in this application, the insert 10 can also be nuts arranged at intervals and embedded in the plastic base 30. The back cover can be fastened to the middle frame 100 through screws. Multiple nuts There is a filling piece 20 in the gap 11 to prevent the sink mark 300 from appearing on the middle frame 100; alternatively, the insert piece 10 can also be a metal buckle groove arranged at intervals and embedded in the plastic base 30, and can be arranged with the back cover. The buckles on the middle frame 100 are engaged with each other to realize quick installation of the middle frame 100 and the back cover. There are fillers 20 in the gaps 11 between the plurality of metal buckle grooves to avoid sink marks 300 on the middle frame 100; or, the The insert 10 can also be a combination of the antenna radiating branch 200 and a nut or a buckle groove. There is a filler 20 in the gap 11 between the antenna radiating branch 200 and the nut or the buckle groove to avoid sink marks 300 on the middle frame 100 .

Optionally, the filling member 20 does not need to completely fill the gap 11, but only fills most of the space in the gap 11. For example, as shown in FIG. 8, there are a small number of gaps 11 on both sides of the filling member 20. This small amount The width of the gap 11 is less than 0.8mm. Since most of the space in the gap 11 has been occupied by the filler 20, the defect problem of the sink mark 300 caused by the uneven collapse of the plastic matrix 30 in the gap 11 can be better improved.

Optionally, since the filling piece 20 is not fixedly connected to the insert 10 , when the plastic base 30 is subsequently injection molded, the filling piece 20 can be positioned through the mold to keep it in the gap 11 .

Alternatively, the filling piece 20 may only abut one side of the embedded piece 10 in the gap 11 , and the other side of the embedded piece 10 and the filling piece 20 may have a small amount of gap 11 .

Alternatively, the filling piece 20 can be a prefabricated component directly placed in the gap 11 .

Optionally, the embedded component 10 , that is, the antenna radiating branch 200 is made of metal material. The antenna radiating branch 200 made of metal material can be a plate-like structure, a linear structure, or a stacked structure inside the electronic device. The arbitrary structure of the design is not specifically limited here.

Optionally, the insert 10 , that is, the antenna radiating branch 200 is made of copper, but it is not limited thereto. Any metal material with good electrical conductivity and low resistivity, such as silver or aluminum, can be used as the material of the antenna radiating branch 200 .

FIG. 10 is an enlarged view of another example at E in FIG. 8 .

As shown in FIG. 10 , in an embodiment provided by this application, both ends of the filling piece 20 offset two adjacent embedded pieces 10 respectively.

In this embodiment, the two ends of the filling piece 20 offset the two adjacent embedded pieces 10 respectively, so that the filling piece 20 can completely fill the gap 11 space, so that the plastic matrix 30 can be formed on the embedded piece 10 and the filling piece 20 Continuous and uniform thickness to completely improve the problem of sink mark 300.

In addition, the two ends of the filling piece 20 are respectively offset against the two adjacent embedded pieces 10, so that the filling piece 20 can be clamped and limited by the embedded pieces 10 in the gap 11, thereby eliminating the need for a connection between the inserting piece 10 and the filling piece 10. connection structure between. In addition, since the filling piece 20 is clamped and positioned by the insert 10, the corresponding positioning structure on the mold can be omitted.

FIG. 11 is an enlarged view of another example at E in FIG. 8 .

As shown in FIG. 11 , in an embodiment provided by this application, both ends of the filling piece 20 are respectively connected to two adjacent embedded pieces 10 .

In this embodiment, the two ends of the filling piece 20 are connected to the embedded pieces 10 on both sides of the gap 11, so that the filling piece 20 can be fixed in the gap 11, thus improving the anti-seismic effect of the filling piece 20. After connecting the filling piece 20 and When the embedded part 10 is transferred to the injection molding station of the plastic base 30 , the filling part 20 can be effectively prevented from falling off from the gap 11 .

In addition, the filling piece 20 is connected between the two embedded pieces 10, which can provide a certain stability to the embedded piece 10, avoid impact on the embedded piece 10 during the injection of the plastic matrix 30, and prevent the embedded piece 10 from being displaced. Avoid changes in the shape of gap 11.

For example, when the embedded part 10 is an antenna radiating branch 200, the end of the antenna radiating branch 200, that is, the part adjacent to the gap 11, has weak supporting force and poor stability. When the plastic matrix 30 is injected into the mold, The flowing plastic matrix 30 will impact the end of the antenna radiating branch 200 and cause the antenna radiating branch 200 to deviate. At the same time, it will also cause the size of the gap 11 to change, resulting in abnormalities in the resonant frequency and bandwidth of the antenna. After the two adjacent antenna radiating branches 200 are connected through the filler 20, the tension of the two antenna radiating branches 200 can be increased at the same time, so that the two antenna radiating branches 200 have a certain hardness to resist the force of the plastic matrix 30. impact, thereby ensuring the accurate positioning of the antenna radiation branch 200 inside the plastic matrix 30 and ensuring the accurate shape and size of the gap 11 .

In addition, both ends of the filling piece 20 are respectively connected to two adjacent embedded pieces 10 , that is, the filling piece 20 connects multiple disconnected antenna radiation branches 200 into a whole, without any breakpoints, thereby allowing multiple antennas to radiate. The branches 200 form an integrated form to enhance the strength of the middle frame 100 . Just imagine, if there is no embedded component 10, there will be break points (ie, branch gaps 201) between the multiple antenna radiating branches 200. When the middle frame 100 is bent, stress concentration will easily occur at the break points, causing the middle frame 100 to be separated from the middle frame 100. Deformed or broken at the break point.

Alternatively, the filling piece 20 can be directly connected to two adjacent embedded pieces 10. For example, as shown in Figure 11, the two ends of the filling piece 20 and the embedded pieces 10 are bonded through adhesive 50; or, the filling piece 20 It can also be indirectly connected to two adjacent embedded parts 10 through an intermediate component. For example, the connecting portion 21 in the embodiment to be described later serves as an intermediate component. For more detailed description, please refer to the embodiment to be described later.

FIG. 12 is a schematic diagram of an example of the insert 10 and the filler 20 provided by the embodiment of the present application.

As shown in FIG. 12 , in an embodiment provided by this application, connecting parts 21 are provided at both ends of the filling piece 20 , and the filling piece 20 is connected to the embedded piece 10 through the connecting parts 21 .

In the aforementioned embodiment, both ends of the filling piece 20 are directly connected to two adjacent embedded pieces 10, and the connection area between the two is only the overlapping area of the end faces of the filling piece 20 and the embedded pieces 10, so the connection strength is limited. In this embodiment, by providing connecting portions 21 at both ends of the filling piece 20, the connecting portions 21 are connected to the insert 10, and are not limited by the connection surface. By increasing the distance between the connecting portion 21 and the insert 10, The overlapping surface further improves the connection strength between the filling piece 20 and the embedded piece 10 .

Optionally, a chamfered bevel is provided on the edge of the connecting part 21 , that is, at the corner close to the surface of the embedded part 10 , so that the connecting part 21 and the embedded part 10 can be smoothly transitioned, thereby preventing the occurrence of the problem after wrapping the plastic matrix 30 The obvious thickness difference further rules out the occurrence of sink marks 300.

Alternatively, the filling piece 20 can be a prefabricated component, and the connecting portion 21 is connected to the embedded piece 10 through adhesive 50, a socket structure, a limiting structure 40, etc., so as to fix the filling piece 20 on the embedded piece 10. on the insert part 10 and the filling part 20, and then a plastic matrix 30 is provided outside the insert part 10 and the filling part 20.

Specifically, as shown in FIG. 12 , adhesive 50 is applied to the side of the connecting part 21 facing the embedded part 10 . After the filling part 20 is inserted into the gap 11 , the connecting part 21 is bonded and fixed with the embedded part 10 .

Alternatively, the connecting part 21 may also be provided with pins, and the insert 10 may be provided with pin holes. After inserting the filler 20 into the gap 11, the pins may also be inserted into the pin holes, so that the connecting part 21 and the insert 10 are installed. fixed.

Alternatively, the connecting portion 21 and the insert 10 can also be fixedly connected through fasteners or buckle structures.

Optionally, the filler 20 can also be formed on the insert 10 through an insert molding process. After the connecting portion 21 and the insert 10 are joined into an integrated structure, a plastic matrix is provided outside the insert 10 and the filler 20 30.

Among them, in order to enable better connection between the connecting part 21 and the embedded part 10, the surface of the embedded part 10 can be made into a rough surface, so that the plastic base material of the connecting part 21 can have a larger contact area with the embedded part 10. The joint strength between the connecting part 21 and the insert 10 is improved. That is, in an embodiment provided by this application, the surface of the insert 10 is provided with a rhombus knurl structure, concave points or convex points.

FIG. 13 is an enlarged view of another example at E in FIG. 8 . FIG. 14 is a schematic diagram of another example of the insert 10 and the filler 20 provided by the embodiment of the present application.

As mentioned above, the connecting part 21 and the embedded part 10 can also be connected through a socket structure. That is, in an embodiment provided by this application, as shown in Figures 13 and 14, the connecting part 21 is provided with a hole for the embedded part. 10 is inserted into the slot 211, and the insert 10 is plugged into the filler 20 through the slot 211.

In this embodiment, the connecting part 21 and the embedded part 10 are connected through a socket structure, which has the advantage of convenient installation. The filling part 20 and the embedded part 10 can be easily installed and fixed.

Optionally, the slot 211 on the connecting part 21 is a through-slot penetrating the outer wall of the connecting part 21 , so that the insert 10 can be easily slid into the slot 211 .

Optionally, in order to improve the insertion strength of the insert 10 and the connecting part 21, the size of the insert 10 is slightly larger than the size of the slot 211, so that the insert 10 and the slot 211 form an interference fit, thereby making the insert 10 can be firmly plugged into the connecting part 21. This ensures that when the filling piece 20 and the insert piece 10 are transferred to the work station for injection molding the plastic base 30, the filling piece 20 can be prevented from falling off from the gap 11. In addition, the embedded part 10 can be made to have a certain stability, which can avoid impact on the embedded part 10 during the process of injecting the plastic matrix 30, prevent the embedded part 10 from being displaced, and prevent the shape of the gap 11 from changing.

In another embodiment provided by this application, the filling piece 20 and the connecting portion 21 in FIG. 13 can also be directly formed on the insert 10 through an insert molding process.

On the basis of the socket structure, in order to further improve the connection strength between the connecting part 21 and the embedded part 10 , in an embodiment provided by this application, the connecting part 21 and the embedded part 10 are also connected through a limiting structure 40 .

Alternatively, the limiting structure 40 may be composed of a through hole 43 and a protruding post 44; or, the limiting structure 40 may also be composed of a groove 41 and a protruding block 42.

In an embodiment provided by this application, the limiting structure 40 includes a through hole 43 and a protruding post 44. The connecting part 21 is provided with a through hole 43, and the insert 10 is provided with a protruding post 44.

Of course, the base bodies of the through holes 43 and the protruding posts 44 can also be interchanged. That is, in another embodiment provided by this application, the insert 10 is provided with the through holes 43 and the connecting portion 21 is provided with the protruding posts 44 .

FIG. 15 is an enlarged view of another example at E in FIG. 8 . Figure 16 is a schematic diagram of another example of the insert 10 and the filler 20 provided by the embodiment of the present application. FIG. 17 is a schematic diagram of the insert 10 and the filler 20 in FIG. 16 after they are connected.

As shown in Figures 15 to 17, in an embodiment provided by the present application, the end of the insert 10 adjacent to the gap 11 is a flat tail-shaped structure 12, the through hole 43 is opened on the flat tail-shaped structure 12, and the protruding pillar 44 is provided in the slot 211.

In this embodiment, the end of the insert 10 is a flat tail-shaped structure 12 and is provided with a through hole 43, so that the flat tail-shaped structure 12 and the through hole 43 form a better glue drawing effect. When the filler 20 is formed on the component 10, after the plastic is wrapped around the outside of the flat tail structure 12 and solidified, the connection strength between the connecting part 21 and the embedded component 10 can be improved. The plastic enters the through hole 43 and solidifies to form the protruding pillar 44. The protruding posts 44 and the through holes 43 cooperate with each other to improve the connection strength between the connecting portion 21 and the insert 10 . Therefore, the flat tail-shaped structure 12 and the through hole 43 can tightly join the plastic base materials of the insert 10 and the filler 20 together to achieve a reliable connection relationship.

Figure 18 is a schematic diagram of another example of the insert 10 and the filler 20 provided by the embodiment of the present application.

If the insert molding process is not used to form the filler 20 on the insert 10 , the filler 20 can be prefabricated in advance, and the filler 20 can be installed on the insert 10 through assembly. In order to facilitate assembly, as shown in Figure 18, in an embodiment provided by this application, the filling piece 20 is two parts spliced to each other, each part has a half boss 44, and the two parts of the filling piece 20 are respectively formed from the embedded part. The left and right sides of 10 are assembled on the insert 10 .

In an embodiment provided by this application, the limiting structure 40 includes a groove 41 and a protrusion 42, the connecting part 21 is provided with the groove 41, and the insert 10 is provided with the protrusion 42.

Of course, the bases on which the grooves 41 and the bumps 42 are provided can also be interchanged. That is, in another embodiment provided by this application, the insert 10 is provided with the grooves 41 and the connecting portion 21 is provided with the bumps 42 .

FIG. 19 is an enlarged view of another example at E in FIG. 8 . Figure 20 is a schematic diagram of another example of the insert 10 and the filler 20 provided by the embodiment of the present application. FIG. 21 is a schematic diagram of the insert 10 and the filler 20 in FIG. 20 after they are connected.

As shown in FIGS. 19 and 20 , in an embodiment provided by the present application, the groove 41 is an annular through groove provided on the periphery of the insert 10 , and the protrusions 42 are provided in an annular shape in the groove of the slot 211 wall.

In this embodiment, the end of the insert 10 is an annular through groove, so that the insert 10 can form a better glue pulling effect. When the connecting portion 21 is formed on the insert 10 through the insert molding process, the plastic enters the groove 41 After internal curing, the bumps 42 are formed. The grooves 41 and the bumps 42 cooperate with each other to improve the connection strength between the connecting part 21 and the insert 10, and enable the insert 10 and the plastic base material of the filler 20 to be tightly joined. Together, we achieve a reliable connection.

Figure 22 is a schematic diagram of another example of the insert 10 and the filler 20 provided by the embodiment of the present application.

If the insert molding process is not used to form the filler 20 on the insert 10 , the filler 20 can be prefabricated in advance, and the filler 20 can be installed on the insert 10 through assembly. In order to facilitate assembly, as shown in Figure 22, in an embodiment provided by the present application, the filler 20 is two parts spliced to each other. Each part has a half-circle bump 42 in the slot 211. The two parts of the filler 20 are 20 are respectively assembled on the insert 10 from the upper and lower sides of the insert 10 .

Figure 23 is a partial schematic diagram of the middle frame 100 provided by the embodiment of the present application.

As shown in Figure 23, in an embodiment provided by this application, the filling piece 20 is detachably disposed in the gap 11, and the plastic base 30 is provided with an opening 31 through which the filling piece 20 can leak out, so that the filling piece 20 can be Remove from opening 31.

As long as the filler 20 is always located in the gap 11 before the plastic matrix 30 completes cooling and solidification, this can ensure that the plastic matrix 30 is protected from uneven shrinkage, thereby effectively preventing the occurrence of sink marks 300 . After the plastic matrix 30 completes cooling and solidification, the filler 20 can also be removed under special circumstances, which can reduce the overall weight of the insert molded product, or in some cases where the air gap 11 must exist, the filler 20 can be removed The gaps 11 between the inserts 10 can be completely free of foreign matter.

In addition, removing the filler 20 also facilitates the scrapping and recycling of the middle frame 100 product. When the middle frame 100 without the filler 20 is scrapped and recycled, only the plastic base 30 and the insert 10 need to be separated. If the filler 20 is added, the plastic base 30 and the insert 10 need to be separated. 10. Separating the three materials of the filling piece 20 is relatively difficult and requires many separation processes.

In an embodiment provided in this application, the cross-section of the filling piece 20 is larger than or equal to the cross-section of the insert 10 .

It should be noted that the cross section in this application refers to the cross section cut along the width direction of the filler 20 or the insert 10 .

In this embodiment, the cross-section of the filler 20 is larger than or equal to the cross-section of the insert 10 , so that the filler 20 can completely fill the gap 11 , thereby completely improving the sink mark 300 problem.

In some embodiments provided in this application, the material of the plastic matrix 30 includes, but is not limited to, polycarbonate (PC), polypropylene (PP), polyvinyl chloride (PVC), polyformaldehyde ( paraformaldehyde (POM), polyurethane (PU), polyethylene glycol terephthalate (PET), polybutylene terephthalate (polybutyleneterephthalate, PBT), ethylene-vinyl acetate copolymer (ethylene-vinyl acetate copolymer, EVA) one or more.

In addition, the material selection of the filling piece 20 is also important. The basic principle of the selection is that the expansion coefficient of the material of the filling piece 20 should be as close as possible to the linear expansion coefficient of the selected plastic matrix 30 material. If the linear expansion coefficients of the materials of the filling piece 20 and the plastic matrix 30 are too different, and the shrinkage rates of the two materials are different when they are cooled, stress will be concentrated around the filling piece 20, which may cause difficulty in molding and produce radial cracks.

Based on the above principles, in some embodiments provided by this application, the material of the filler 20 can be the same as the material of the plastic matrix 30 , including the above-mentioned polycarbonate, polypropylene, polyvinyl chloride, polyformaldehyde, polyurethane, and polyparaphenylene. One or more of ethylene diformate, polybutylene terephthalate, and ethylene-vinyl acetate copolymer.

In other embodiments provided in this application, the material of the filler 20 may also include, but is not limited to, one or more of silicone, thermoplastic elastomers (TPE), and thermoplastic polyurethane (TPU). . Among them, the linear expansion coefficient of silicone, thermoplastic elastomer, and thermoplastic polyurethane elastomer is not much different from the material of the above-mentioned plastic matrix 30 .

FIG. 24 is a flow chart of an example of the insert molding method provided by the embodiment of the present application.

As shown in Figure 24, the embodiment of the present application also provides an insert molding method, which includes the following steps.

Step 101: Provide the embedded parts 10. The number of the embedded parts 10 is multiple. The multiple embedded parts 10 are arranged at intervals, and there is a gap 11 between two adjacent embedded parts 10.

Step 102: dispose the filling member 20 in the gap 11.

Step 103: Put the insert part 10 and the filling part 20 into the first mold 60.

Step 104: Inject the first plastic material into the first mold 60 to form the plastic base 30 joined with the insert 10 and the filler 20.

Step 105: After the plastic matrix 30 is cooled and solidified, the mold is demoulded to obtain an insert molded product.

In the insert molding method provided by the embodiment of the present application, a filler 20 is provided in the gap 11 between the inserts 10, and the gap 11 is filled with the filler 20, and then the filler 20 is placed outside the insert 10 and the filler 20. The plastic matrix 30 is wrapped. Since the filler 20 occupies the space in the gap 11, it is avoided that a large amount of plastic matrix 30 enters the gap 11 and causes a large range of thickness difference in the plastic matrix 30, thereby improving the thickness of the plastic matrix 30 on the insert molded product. The distribution uniformity allows the plastic matrix 30 everywhere on the insert molded product to shrink inward at approximately the same shrinkage rate, thereby improving the problem of sink marks 300 defects on the surface of the insert molded product.

Figure 25 is a flow chart of another example of the insert molding method provided by the embodiment of the present application.

Figure 26 is a schematic diagram of an example of the insert molding method provided by the embodiment of the present application. Among them, (a) in Figure 26 is a schematic diagram of the insert 10; (b) in Figure 26 is a schematic diagram of the insert 10 being placed in the second mold 70; (c) in Figure 26 is the insert 10 and the filler 20 is placed into the first mold 60; (d) in FIG. 26 is a schematic diagram of the plastic matrix 30 wrapped outside the insert 10 and the filler 20.

As shown in Figures 25 and 26, in an embodiment provided by this application, the method includes the following steps.

Step 201, as shown in (a) of Figure 26, an insert 10 is provided. The number of the inserts 10 is multiple. The plurality of inserts 10 are arranged at intervals, and there is a gap 11 between two adjacent inserts 10.

Step 202, as shown in (b) of FIG. 26, place the part of the insert 10 adjacent to the gap 11 into the second mold 70.

Step 203 , inject the second plastic material into the second mold 70 to form the filling piece 20 that is joined to the insert 10 and fills the gap 11 .

Step 204 , after the filling piece 20 is cooled and solidified, it is demoulded. As shown in (c) in FIG. 26 , the insert piece 10 and the filling piece 20 are placed into the first mold 60 .

Step 205: Inject the first plastic material into the first mold 60 to form the plastic matrix 30 joined with the insert 10 and the filler 20.

Step 206, as shown in (d) in Figure 26, after the plastic matrix 30 is cooled and solidified, the mold is demoulded to obtain an insert molded product.

In this embodiment, the filler 20 is formed on the insert 10 through an insert molding process, so that the insert 10 and the filler 20 can be closely joined, so that the two have greater connection strength, which can ensure that the insert 10 has sufficient The strong tension force can resist the impact when the plastic material is injected, and can effectively prevent the embedded part 10 from being displaced and the gap 11 from being deformed.

Among them, the first plastic material is the optional material for the plastic matrix 30 mentioned above. The second plastic material is the optional material for the filling member 20 mentioned above.

Figure 27 is a flow chart of another example of the insert molding method provided by the embodiment of the present application.

Figure 28 is a schematic diagram of another example of the insert molding method provided by the embodiment of the present application. Among them, (a) in Figure 28 is a schematic diagram of the embedded part 10; (b) in Figure 28 is a schematic diagram of the rubber structure on the embedded part 10; (c) in Figure 28 is the embedded part 10 placed in the second Schematic diagram of the mold 70; (d) in Figure 28 is a schematic diagram of the insert 10 and the filler 20 being placed into the first mold 60; (e) in Figure 28 is the plastic matrix 30 wrapped outside the insert 10 and the filler 20 schematic diagram.

In some embodiments provided in this application, the method includes the following steps.

Step 301, as shown in (a) of Figure 28, an insert 10 is provided. The number of the inserts 10 is multiple. The plurality of inserts 10 are spaced apart, and there is a gap 11 between two adjacent inserts 10.

Step 302, as shown in (b) of FIG. 28, make a rubber structure on part of the embedded part 10 adjacent to the gap 11. The rubber-drawing structure includes, but is not limited to, one or more of knurling, concave points, raised points, grooves 41, through holes 43, protrusions 44, bumps 42, and flat tail structures 12.

Step 303, as shown in (c) in FIG. 28, place the part of the embedded part 10 adjacent to the gap 11 into the second mold 70.

Step 304: Inject the plastic material into the second mold 70 to form the filling piece 20 that is joined to the insert 10 and fills the gap 11.

Step 305 , after the filling piece 20 is cooled and solidified, it is demoulded. As shown in (d) in FIG. 28 , the insert piece 10 and the filling piece 20 are placed into the first mold 60 .

Step 306: Inject the plastic material into the first mold 60 to form the plastic matrix 30 joined with the insert 10 and the filler 20.

Step 307, as shown in (e) in Figure 28, after the plastic matrix 30 is cooled and solidified, the mold is demoulded to obtain an insert molded product.

In this embodiment, a rubberized structure is formed on the insert 10, which can further improve the joint strength of the insert 10 and the filler 20.

Figure 29 is a flow chart of another example of the insert molding method provided by the embodiment of the present application.

Figure 30 is a schematic diagram of another example of the insert molding method provided by the embodiment of the present application. Among them, (a) in Figure 30 is a schematic diagram of the insert 10; (b) in Figure 30 is a schematic diagram of the filler 20; (c) in Figure 30 is a schematic diagram after the insert 10 and the filler 20 are connected; Figure 30 (d) is a schematic diagram of the insert 10 and the filler 20 being placed into the first mold 60; Figure 30 (e) is a schematic diagram of the plastic matrix 30 wrapped outside the insert 10 and the filler 20.

In some embodiments provided in this application, the step of arranging the filling member 20 in the gap 11 includes:

Step 401, as shown in (a) of Figure 30, an insert 10 is provided. The number of inserts 10 is multiple. The plurality of inserts 10 are arranged at intervals, and there is a gap 11 between two adjacent inserts 10.

Step 402, as shown in (b) of FIG. 30 , the filling member 20 is provided.

Step 403, as shown in (c) in Figure 30, place the filling piece 20 in the gap 11 and firmly connect it to the embedded piece 10.

Step 404, as shown in (d) in FIG. 30 , place the insert 10 and the filling member 20 into the first mold 60 .

Step 405: Inject the first plastic material into the first mold 60 to form the plastic matrix 30 joined with the insert 10 and the filler 20.

Step 406, as shown in (e) in Figure 30, after the plastic matrix 30 is cooled and solidified, the mold is demoulded to obtain an insert molded product.

Optionally, the filling piece 20 and the embedded piece 10 can be fixedly connected through the adhesive 50 , or through the socket structure, or through the limiting structure 40 , or through the buckle structure. Fixed connection, or fixed connection through fasteners.

Optionally, the filling piece 20 is placed in the gap 11 and fixedly connected to the insert 10, which can be placed manually; or, a robot can be used for automatic placement, which is beneficial to reducing manual errors, improving efficiency, shortening the insert molding cycle and improving Product reliability.

Optionally, the following steps are also included after step 406:

Step 407: The insert molded product is provided with an opening 31 for leaking the filling piece 20, and the filling piece 20 can be removed from the opening 31.

Removing the filler 20 also facilitates scrapping and recycling of the insert molded article. When the insert-molded product without the filler 20 is scrapped and recycled, only the plastic matrix 30 and the insert 10 need to be separated, which is relatively less difficult and involves fewer separation processes.

Finally, it should be noted that the above are only specific implementation modes of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be covered by this application. within the scope of protection applied for. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (20)

1. An insert molded product, characterized in that it includes: There are multiple embedded parts (10), the plurality of embedded parts (10) are arranged at intervals, and there is a gap (11) between two adjacent embedded parts (10); A filling piece (20) is arranged in the gap (11); A plastic matrix (30) is wrapped around the insert (10) and the filling piece (20). 2. The insert-molded product according to claim 1, characterized in that two ends of the filling piece (20) respectively offset two adjacent embedded pieces (10). 3. The insert-molded product according to claim 2, characterized in that two ends of the filling piece (20) are respectively connected to two adjacent embedded pieces (10). 4. The insert molded product according to claim 3, characterized in that connecting parts (21) are provided at both ends of the filling piece (20), and the filling piece (20) passes through the connecting parts (21). ) is connected to the insert (10). 5. The insert molded product according to claim 4, characterized in that the connecting portion (21) is provided with a slot (211) for inserting the insert (10), and the insert (10) The filling piece (20) is inserted through the slot (211). 6. The insert molded product according to claim 5, characterized in that the connecting portion (21) and the insert (10) are also connected through a limiting structure (40). 7. The insert molded product according to claim 6, characterized in that the limiting structure (40) includes a through hole (43) and a protruding column (44), the connecting portion (21) and the embedded One of the parts (10) is provided with the through hole (43), and the other is provided with the protruding column (44). 8. The insert molded product according to claim 7, characterized in that the end of the insert (10) adjacent to the gap (11) is a flat tail-shaped structure (12), and the through hole (43) ) is opened on the flat tail-shaped structure (12), and the protruding column (44) is arranged in the slot (211). 9. The insert molded product according to claim 6, characterized in that the limiting structure (40) includes a groove (41) and a convex block (42), the connecting portion (21) and the embedded One of the pieces (10) is provided with the groove (41), and the other is provided with the bump (42). 10. The insert molded product according to claim 9, characterized in that the groove (41) is an annular through groove provided on the outer periphery of the insert (10), and the convex block (42) is annular. Ring-shaped and arranged on the groove wall of the slot (211). 11. The insert molded product according to any one of claims 1 to 10, characterized in that the filling piece (20) is detachably disposed in the gap (11), and the plastic base (30) ) is provided with an opening (31) through which the filling piece (20) can leak out, so that the filling piece (20) can be removed from the opening (31). 12. The insert-molded product according to any one of claims 5 to 10, characterized in that the surface of the insert (10) is provided with knurled structures, concave points or convex points. 13. The insert-molded article according to any one of claims 1 to 12, characterized in that the cross-section of the filling piece (20) is greater than or equal to the cross-section of the insert (10). 14. The insert molded product according to any one of claims 1 to 13, characterized in that the material of the plastic matrix (30) includes polycarbonate, polypropylene, polyvinyl chloride, polyformaldehyde, polyurethane, One or more of polyethylene terephthalate, polybutylene terephthalate, and ethylene-vinyl acetate copolymer. 15. A middle frame, characterized in that it includes the insert molding according to any one of claims 1 to 14, and the insert (10) includes an antenna radiating branch (200). 16. An electronic device, characterized by comprising the middle frame (100) as claimed in claim 15. 17. An insert molding method, characterized by comprising: Embedded parts (10) are provided, the number of the embedded parts (10) is multiple, the plurality of embedded parts (10) are arranged at intervals, and there is a gap (11) between two adjacent embedded parts (10) ; Arrange the filling piece (20) in the gap (11); Put the insert (10) and the filling piece (20) into the first mold (60); Inject the first plastic material into the first mold (60) to form a plastic matrix (30) joined with the insert (10) and the filling piece (20); After the plastic matrix (30) is cooled and solidified, the mold is demoulded to obtain an insert molded product. 18. The insert molding method according to claim 17, characterized in that the step of arranging the filler (20) in the gap (11) includes: Place the part of the insert (10) adjacent to the gap (11) into the second mold (70); A second plastic material is injected into the second mold (70) to form the filling piece (20) that is joined to the insert piece (10) and fills the gap (11). 19. The insert molding method according to claim 18, characterized in that, before the step of placing the part of the insert (10) adjacent to the gap (11) into the second mold (70) include: A rubberized structure is made on the part of the insert (10) adjacent to the gap (11). 20. The insert molding method according to claim 17, characterized in that the step of arranging the filler (20) in the gap (11) includes: Provide filler pieces (20); The filling piece (20) is placed in the gap (11) and fixedly connected to the embedded piece (10).