CN217021200U - Press-in jig and workpiece - Google Patents

Abstract

A press-in jig is used for pressing a reinforcing sheet into an injection molding groove of a workpiece and comprises a base, a carrier, a pressure head and a pressing assembly, wherein the base comprises a fixing part, the workpiece is positioned on the fixing part, and an opening of the injection molding groove is upward; the carrier is positioned on the injection molding groove and comprises a press-in cavity, the press-in cavity penetrates through the carrier along the vertical direction, and the press-in cavity is communicated with the injection molding groove; the pressure head is positioned above the press-in cavity and used for extending into the press-in cavity; the pressing component is positioned above the pressure head. The pressing assembly is used for pressing the pressing head, so that the pressing head presses the reinforcing sheet into the injection molding groove through the pressing cavity. The application also provides a workpiece prepared by the pressing-in device. The utility model provides a tool of impressing can impress the reinforcing piece convenient and fast ground and mould plastics the inslot, and the simple structure of tool of impressing, convenient operation, low cost, and the carrier can realize with the quick counterpoint in the groove of moulding plastics.

Description

Press-in jig and workpiece

Technical Field

The application relates to the technical field of mechanical jigs, in particular to an injection molding in-groove pressing-in jig capable of pressing reinforcing sheets into workpieces and a workpiece prepared by adopting the pressing-in jig.

Background

In the process of forming a metal housing of a thin-wall 3C consumer electronic product (e.g., a back case of a tablet pc), as shown in fig. 1, a plurality of segments are required to be formed on a housing 1 ', an injection molding groove 2' is formed between two adjacent segments of metal housings, and an isolation plastic 3 'is formed by injecting a plastic into the injection molding groove 2' to facilitate signal transmission.

In the traditional injection molding process, because the strength of the shell 1' is insufficient (especially a thin-wall shell), and meanwhile, the impact force of a plastic melt is large, the product after injection molding is easy to deform, as shown in fig. 2, the deformation is large and is usually more than 0.4-0.5 mm, so that the flatness of the product is reduced, and the requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of the above, in order to solve at least one of the above problems, it is necessary to provide a press-in jig and a workpiece obtained by pressing a reinforcing sheet into an injection groove of a housing using the press-in jig.

The application provides a press-in jig which is used for pressing a reinforcing sheet into an injection molding groove of a workpiece, and comprises a base, a carrier, a pressure head and a pressing assembly, wherein the base comprises a fixing part which is used for bearing the workpiece, so that the opening of the injection molding groove faces upwards; the carrier comprises a press-in cavity, the press-in cavity penetrates through the carrier along the vertical direction, and the carrier is detachably arranged on the workpiece so as to enable the press-in cavity to be communicated with the injection molding groove; the pressing head is positioned at one end of the pressing-in cavity far away from the fixing part and is used for extending into the pressing-in cavity; the pressing assembly is located on one side, away from the carrier, of the pressure head. The pressing assembly is used for pressing the pressing head, so that the pressing head presses the reinforcing sheet into the injection molding groove through the pressing cavity.

In some possible embodiments, the pressing-in cavity includes a first cavity and a second cavity, the first cavity is close to the fixing portion, the second cavity is far away from the fixing portion, a convex portion is arranged on the inner wall of the first cavity, an inclined surface is arranged in a region of the convex portion close to the second cavity, and a tangent line of any point on the inclined surface forms an obtuse angle with the inner wall of the second cavity.

In some possible embodiments, the carrier includes a first shaping block and a second shaping block detachably connected, the first shaping block including a first surface and a second surface oppositely disposed, and a first side surface connecting the first surface and the second surface. The second shaped block includes third and fourth surfaces disposed opposite to each other, and a second side surface connecting the third and fourth surfaces. The first side surface and the second side surface jointly enclose the press-in cavity, the convex part is located on the first side surface, the second side surface is provided with a concave part corresponding to the convex part, and the convex part and the concave part enclose the first cavity.

In some possible embodiments, the first surface protrudes away from the second surface to form a first positioning portion, and the second side surface extends away from the fourth surface to form a second positioning portion.

In some possible embodiments, the subassembly of pressing includes support, flexible piece, briquetting, cam shaft and cam down, the support is including locating two support arms that just set up relatively on the base, locate two crossbeam on the support arm, locate two risers on the crossbeam and locate two diaphragm on the riser, flexible piece activity is run through the crossbeam, the briquetting is located down flexible piece is close to the one end of pressure head, the cam shaft rotates and sets up on the riser, and is located flexible piece is kept away from one side of pressure head, the cam is fixed in the cam shaft.

In some possible embodiments, the pressing assembly further includes a guide rod and a return spring, one end of the guide rod is fixed on the telescopic block, the other end of the guide rod movably penetrates through the cross beam, and the return spring is sleeved on one end, far away from the lower pressing block, of the guide rod.

In some possible embodiments, a plurality of cams are arranged on the cam rotating shaft, and each cam corresponds to one telescopic block and one lower pressing block; the pressing assembly further comprises a pressing handle and two limiting columns located on each vertical plate, the pressing handles are fixed to the two ends of the cam rotating shaft, and the limiting columns correspond to the pressing handles.

In some possible embodiments, the pressing head comprises a pressing piece and a pressing portion located at one end of the pressing piece, and an end of the pressing piece, which is far away from the pressing portion, is provided with a clearance groove.

The application also provides a workpiece prepared by adopting the press-in jig, and the workpiece comprises a shell, an injection molding groove formed in the shell and a reinforcing sheet arranged in the injection molding groove.

This application still provides an adopt as above the work piece of tool preparation of impressing, the work piece includes the casing, is located groove of moulding plastics on the casing, be located mould plastics reinforcing piece and stopper in the inslot, the stopper is located mould plastics on the inner wall of the opening part in groove, the stopper is used for fixing reinforcing piece, just reinforcing piece is elastic.

Compare in prior art, the tool of impressing that this application provided is through the design and the carrier that the groove phase matches that moulds plastics of work piece, cooperation pressure head and pressing component, can impress the inslot that moulds plastics with reinforcing piece convenient and fast ground, the tool's of impressing simple structure, convenient operation, low cost, and the carrier can realize with the quick counterpoint in the groove of moulding plastics, the counterpoint degree of difficulty is low, and the counterpoint precision in the chamber of impressing and the groove of moulding plastics is high. In addition, through the convex part that has an inclined plane at the intracavity design of impressing of carrier, can make the reinforcing piece take place to warp in first cavity, and then can make the reinforcing piece cross the stopper and get into the groove of moulding plastics, realized the purpose of the reinforcing piece of impressing fast in the inslot of moulding plastics that is equipped with the stopper.

Drawings

Fig. 1 is a schematic structural diagram of a conventional injection-molded workpiece.

Fig. 2 is a schematic view of the surface flatness of a conventional injection molded workpiece.

FIG. 3 is a schematic view of a workpiece structure according to the present application.

Fig. 4 is a schematic structural diagram of a press-in jig provided in an embodiment of the present application after being coordinated with a workpiece.

Fig. 5 is a cross-sectional view along V-V of the press-in jig of fig. 4 after being engaged with a workpiece.

Fig. 6 is a cross-sectional view of the workpiece shown in fig. 3 taken along VI-VI.

Fig. 7 is a schematic cross-sectional view of a carrier according to an embodiment of the present application.

Fig. 8 is a schematic view of a carrier according to an embodiment of the present application before pressing the reinforcing sheet into the indenter.

Fig. 9 is a schematic view of the first shaping block and indenter and reinforcement sheet of fig. 8.

Fig. 10 is a schematic view of the second shaping block and the ram and reinforcing sheet of fig. 8.

Fig. 11 is a schematic structural diagram of a first shaping block according to an embodiment of the present application.

Fig. 12 is a schematic view of a carrier according to an embodiment of the present application after pressing the reinforcing sheet into the carrier after the carrier is engaged with the indenter.

Fig. 13 is a schematic view before the reinforcing sheet is pressed into the injection molding groove of the workpiece by using the pressing jig of the present application.

Fig. 14 is a schematic view of the reinforcing sheet passing over the stopper by using the press-in jig of the present application.

Fig. 15 is a schematic view after the reinforcing sheet is pressed into the injection molding groove of the workpiece by using the press-in jig of the present application.

FIG. 16 is a schematic view of the surface flatness of a product which is subjected to injection molding after the reinforcing sheet is pressed into a workpiece by using the pressing-in jig of the present application.

Description of the main elements

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

The system embodiments described below are merely illustrative, and the division of the modules or circuits is merely a logical division, and other divisions may be realized in practice. Furthermore, it will be obvious that the term "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units or means recited in the system claims may also be implemented by one and the same unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the injection molding process of a common thin-wall workpiece, the product is easy to deform, and the deformation is large, so that the requirement of a customer is difficult to meet. In order to reduce the deformation of a thin-wall workpiece in the injection molding process, as shown in fig. 3, the workpiece 200 of the present application includes a housing 201 and an injection molding groove 20 located on the housing 201, and in the present application, a reinforcing sheet 10 (for example, a high-strength glass fiber reinforced ceramic sheet) is arranged in the injection molding groove 20 (especially, an injection molding groove with a relatively weak wall thickness), and the reinforcing sheet 10 is combined with plastic after injection molding, so that under the condition that the signal generation is not influenced, the structural strength of the workpiece 200 is increased, the impact resistance of the thin wall near the injection molding groove 20 of the workpiece 200 is improved, the risk of deformation of the housing 201 in the injection molding process is reduced, and further, the flatness of a product is improved.

Referring to fig. 4 and 5, in order to conveniently and quickly place the reinforcing sheet 10 into the injection molding groove 20, an embodiment of the present application provides a press-in jig 100, in an injection molding process of a workpiece 200, the press-in jig 100 is used for pressing the reinforcing sheet 10 into the injection molding groove 20 of the workpiece 200, the press-in jig 100 includes a base 1, a carrier 2, a pressure head 3 and a pressing component 4, wherein the base 1 includes a fixing portion 11, the workpiece 200 is located on the fixing portion 11, an opening of the injection molding groove 20 is upward, that is, the base 1 extends along a horizontal direction b, the base 1 and the workpiece 200 are stacked along a vertical direction a, an opening is disposed at one end of the injection molding groove 20 away from the base 1, in this embodiment, an upward direction along the vertical direction a is defined as an upper direction, and a downward direction along the vertical direction a is defined as a lower direction. The carrier 2 is located the work piece 200 is kept away from one side of base 1, promptly the carrier 2 is located the top of work piece 200, carrier 2 includes a chamber 21 of impressing, the chamber 21 of impressing is located the top in groove 20 of moulding plastics, the chamber 21 of impressing runs through along vertical direction a carrier 2, just the chamber 21 of impressing with the groove 20 intercommunication of moulding plastics. The press ram 3 is located above the press-in chamber 21 and can penetrate into the press-in chamber 21. The pressing component 4 is located on a side of the indenter 3 away from the carrier 2 (i.e. above the indenter 3). The pressing assembly 4 is used for pressing the pressing head 3, so that the pressing head 3 presses the reinforcing sheet 10 into the injection molding groove 20 through the pressing cavity 21.

As shown in fig. 3, 5 and 6, in the injection molding process, in order to prevent the reinforcing sheet 10 from being washed away by the molten plastic fluid in the injection molding groove 20 or causing the reinforcing sheet 10 to be dislocated, a limiting block 30 is disposed on the sidewall of the injection molding groove 20 close to the press-in cavity 21, and after the reinforcing sheet 10 enters the injection molding groove 20, the limiting block 30 is located above the reinforcing sheet 10 to achieve the limiting effect. Referring to fig. 7 and 12, the reinforcing sheet 10 can be pressed into the injection molding groove 20 with the limiting block 30 by designing the structure of the carrier 2. The press-in cavity 21 includes a first cavity 211 close to the injection groove 20 and a second cavity 212 far from the injection groove 20. The injection molding groove 20 is provided with the limiting block 30 near the inner wall of the first cavity 211, and the inner wall of the first cavity 211 corresponds to the limiting block 30 and is provided with a convex part 213. An inclined plane 214 is arranged in a region of the convex portion 213 close to the second cavity 212, a tangent line of any point on the inclined plane 214 forms an obtuse angle with the inner wall of the second cavity 212, and along the horizontal direction b, the highest point of the convex portion 213 is not lower than the highest point of the limiting block 30, so that the reinforcing sheet 10 passes through the limiting block 30 via the convex portion 213 and enters the injection molding groove 20 in the process of being pressed in, and if the height of the limiting block 30 is high, the purpose of pressing the reinforcing sheet 10 into the injection molding groove 20 is difficult to achieve. The reinforcing sheet 10 has elasticity, and the pressing assembly 4 is configured to press the pressing head 3, so that the pressing head 3 presses the reinforcing sheet 10 into the injection molding groove 20 below the stopper 30 via the second cavity 212 and the first cavity 211 in sequence. By designing the convex portion 213 and the inclined surface 214, the reinforcing sheet 10 can be smoothly transited from the second cavity 212 to the second cavity 212 and further enter the injection molding groove 20 beyond the stopper 30. When positioned in the second cavity 212, the reinforcing sheet 10 is in a natural state, in a rectangular configuration (see also fig. 13); after the reinforcing sheet 10 is pressed into the first cavity 211, due to the existence of the protrusion 213 and the elasticity of the reinforcing sheet 10, the reinforcing sheet 10 is pressed and deformed into a curved shape, and the curved reinforcing sheet 10 is continuously pressed downward to reach the stopper 30 (see fig. 14); get across stopper 30 and then get into the groove 20 of moulding plastics, after reinforcing piece 10 got into the groove 20 of moulding plastics, the extrusion force was cancelled, and reinforcing piece 10 resumes the natural state, presents the rectangle structure again (refer to in combination with and refer to figure 15).

Referring to fig. 7 to 10, the carrier 2 includes a first shaping block 22 and a second shaping block 23 detachably connected to each other. The first shaping block 22 includes first and second surfaces 221 and 222 disposed opposite to each other, and a first side surface 223 connecting the first and second surfaces 221 and 222. The second shaping block 23 includes third and fourth surfaces 231 and 232 which are oppositely disposed, and a second side surface 233 connecting the third and fourth surfaces 231 and 232. After the first shaping block 22 and the second shaping block 23 are combined, the first side surface 223 and the second side surface 233 together enclose the press-in cavity 21, the convex portion 213 is located on the first side surface 223, the second side surface 233 is provided with a concave portion 215 corresponding to the convex portion 213, and the convex portion 213 and the concave portion 215 enclose the first cavity 211.

As shown in fig. 8, a thickness h2 of the highest point of the protrusion 213 relative to the corresponding first side surface 223 of the second cavity 212 is set according to a thickness h1 of the stopper 30, and a thickness h1 of the stopper 30 needs to be determined according to an opening width of the injection molding groove 20 and a thickness of the reinforcing sheet 10. As shown in fig. 6, in the present embodiment, in the horizontal direction b, the thickness h1 of the stopper 30 exceeding the side wall of the injection groove 20 is in the range of 0.15mm to 0.20mm, specifically 0.17mm, and the thickness h2 of the protrusion 213 is substantially the same as the thickness h1 of the stopper 30, and is also 0.17 mm.

As shown in fig. 7, referring to fig. 5, the first surface 221 protrudes toward the injection molding groove 20 to form a first positioning portion 224, the second side surface 233 extends toward the injection molding groove 20 to form a second positioning portion 234, and the first positioning portion 224 and the second positioning portion 234 are used to extend into the injection molding groove 20, so that the carrier 2 is positioned in the workpiece 200 corresponding to the injection molding groove 20, and the carrier 2 is prevented from being dislocated during the process of pressing the reinforcing sheet 10.

Referring to fig. 9 and 11, the pressing head 3 includes a pressing piece 31 and a pressing portion 32 located at one end of the pressing piece 31, wherein the pressing piece 31 is configured to extend into the pressing cavity 21 and slide in the pressing cavity 21 along a vertical direction, and the pressing portion 32 is located outside the pressing cavity 21 and configured to press the pressing piece 31.

The pressing piece 31 is roughly a sheet structure with a certain radian, and the shape of the pressing piece 31 is matched with the convex part 213.

Referring to fig. 12, a clearance groove 33 is formed at the end of the pressing plate 31 far from the pressing portion 32, and when the pressing plate 31 enters the injection molding groove 20 from the first cavity 211, the stopper 30 on the sidewall of the injection molding groove 20 can be embedded into the clearance groove 33 on the pressing plate 31 and move in the clearance groove 33, so that the pressing plate 31 can further press the reinforcing plate 10 into the injection molding groove 20, and the influence of the stopper 30 on the stroke of the pressing plate 31 is avoided.

Referring to fig. 4 and 5, the pressing assembly 4 includes a bracket 41, a telescopic block 42, a pressing block 43, a cam rotating shaft 44, a cam 45, a guide rod 46, and a return spring 47. The support 41 is including locating two support arms 411 that just set up relatively on the base 1, locate two crossbeam 412 on the support arm 411, locate two risers 413 on the crossbeam 412 and locate two diaphragm 414 on the riser 413. The telescopic block 42 movably penetrates through the cross beam 412, and the lower pressing block 43 is arranged at one end, close to the pressure head 3, of the telescopic block 42. The cam rotating shaft 44 is rotatably arranged on the vertical plate 413 and is positioned on one side of the telescopic block 42 far away from the pressure head 3. The cam 45 is fixed to the cam shaft 44. One end of the guide rod 46 is fixed on the telescopic block 42, the other end of the guide rod movably penetrates through the cross beam 412, and the return spring 47 is sleeved on one end of the guide rod 46, which is far away from the lower pressing block 43, of the cross beam 412. The cam rotating shaft 44 drives the cam 45 to rotate, so that the cam 45 presses the telescopic block 42, and further drives the lower pressing block 43 to move downwards along the vertical direction a, so that the lower pressing block 43 presses the pressing head 3 and presses the pressing head 3 into the pressing cavity 21. When the pressure increasing head 3 is pressed in place, the driving force of the cam rotating shaft 44 is removed, and the return spring 47 drives the telescopic block 42 and the pressing block 43 to return.

One or more cams 45 can be arranged on the cam rotating shaft 44, each cam 45 is correspondingly provided with a telescopic block 42 and a lower pressing block 43, and the cam can press one pressing head 3. When a plurality of cams 45 are provided, a plurality of pressing heads 3 can be pressed, so that a plurality of reinforcing sheets 10 can be pressed into the injection molding groove 20 at the same time, and the pressing efficiency of the reinforcing sheets 10 is improved.

As shown in fig. 4, the pressing assembly 4 further includes a pressing handle 48, the pressing handle 48 is disposed on the outer sides of the two risers 413 and connected to the cam rotating shaft 44, and the pressing handle 48 can drive the cam rotating shaft 44 to rotate. Two limiting columns 49 are arranged on the outer side wall of each vertical plate 413, and the two limiting columns 49 are respectively located above and below the pressing handle 48 and used for limiting the rotation range of the pressing handle 48.

The process of pressing the reinforcing sheet 10 into the injection groove 20 of the workpiece 200 using the pressing jig 100 is as follows:

as shown in fig. 4 and 5, the workpiece 200 is placed on the fixing portion 11 of the base 1, and the carrier 2 is mounted on the injection groove 20, so that the first positioning portion 224 and the second positioning portion 234 are inserted into corresponding positions of the injection groove 20, and the injection groove 20 is aligned with the press-in cavity 21.

As shown in fig. 9 to 12, referring to fig. 4 and 5 in combination, the reinforcing sheet 10 is placed in the press-in chamber 21, and the pressing sheet 31 of the indenter 3 is extended into the press-in chamber 21. Pressing a pressing handle 48 downwards to enable the cam rotating shaft 44 to rotate, so as to drive the cam 45 to rotate, so that the cam 45 presses the telescopic block 42, and further drive the pressing block 43 to move downwards along the vertical direction a, so that the pressing block 43 presses the pressing head 3 and presses the reinforcing sheet 10 into the first cavity 211 through the second cavity 212 (as shown in fig. 13), the reinforcing sheet 10 is bent and deformed in the first cavity 211, and the deformed reinforcing sheet 10 is further pressed by the pressing head 3 to reach the position of the limiting block 30 (as shown in fig. 14); the pressing head 3 is continuously pressed, so that the deformed reinforcing sheet 10 passes through the limiting block 30 and enters the injection molding groove 20, and after the deformed reinforcing sheet enters the injection molding groove 20, the external force applied to the reinforcing sheet 10 is cancelled and the reinforcing sheet is restored (as shown in fig. 15). When the reinforcing plate 10 is pressed into the injection molding groove 20, the pressing handle 48 is released, the driving force of the cam rotating shaft 44 is removed, and the return spring 47 drives the telescopic block 42 and the pressing block 43 to return.

The utility model provides a tool 100 of impressing is through design and the groove 20 assorted carrier 2 of moulding plastics of work piece 200, cooperation pressure head 3 with press down subassembly 4, can impress the reinforcing piece convenient and fast ground in the groove 20 of moulding plastics, the simple structure of tool 100 of impressing, convenient operation, low cost, and carrier 2 can realize with the groove 20 of moulding plastics counterpoint fast, the counterpoint degree of difficulty is low, and the chamber 21 of impressing and the counterpoint precision height in the groove 20 of moulding plastics. In addition, by designing the convex portion 213 with the inclined surface 214 in the press-in cavity 21 of the carrier 2, the reinforcing sheet 10 can be deformed in the first cavity 211, and further the reinforcing sheet 10 can enter the injection molding groove 20 beyond the stopper 30, so that the purpose of quickly press-in the reinforcing sheet 10 in the injection molding groove 20 provided with the stopper 30 is achieved.

As shown in fig. 3 and fig. 6, the present application further provides a workpiece 200 prepared by using the press-in jig 100, where the workpiece 200 includes a housing 201, an injection molding groove 20 disposed on the housing 201, and a reinforcing sheet 10 disposed in the injection molding groove 20.

It can be understood that, in other embodiments, the workpiece 200 further includes a limiting block 30 disposed on an inner wall of the injection molding groove 20, the limiting block 30 is located on the inner wall of the opening of the injection molding groove 20, the limiting block 30 is used to fix the reinforcing sheet 10, and the reinforcing sheet 10 has elasticity.

The high-strength glass fiber reinforced ceramic plate is used as a reinforcing plate 10 to be embedded into the injection molding groove 20 (especially the part with a very small wall thickness) of the workpiece 200, the non-metallic characteristic of the high-strength glass fiber reinforced ceramic plate does not influence signal receiving and transmitting, and meanwhile, the rigidity of the position of the injection molding groove 20 can be improved, and the deformation of the workpiece 200 can be reduced. In the embodiment, the reinforcing sheet 10 is pressed into the injection molding groove 20 through the press-in jig 100 of the application to the 12-inch aluminum alloy shell, the flatness of the obtained injection molding product is reduced to 0.08-0.12 mm (as shown in fig. 16) from 0.4-0.5 mm (as shown in fig. 2), and the technical bottleneck of the industry is broken through. In addition, through increasing stopper 30 at the inner wall in the groove 20 of moulding plastics of work piece 200, can ensure that reinforcing piece 10 position can not washed away by plastics when moulding plastics, moreover, because of the high strength glass fibre potsherd has certain toughness, tool 100 of impressing is automatic with reinforcing piece 10 plastic bending and cross stopper 30 when pushing down to in embedding groove 20 of moulding plastics, easy operation is reliable.

Claims (10)

1. The utility model provides a tool of impressing for in the inslot of moulding plastics of work piece is impressed with the reinforcing piece, its characterized in that, the tool of impressing includes:

the base comprises a fixing part, and the fixing part is used for bearing the workpiece so that the opening of the injection molding groove faces upwards;

the carrier comprises a press-in cavity, the press-in cavity penetrates through the carrier along the vertical direction, and the carrier is detachably arranged on the workpiece so as to enable the press-in cavity to be communicated with the injection molding groove;

the pressure head is positioned at one end of the press-in cavity, which is far away from the fixing part, and the pressure head is used for extending into the press-in cavity;

the pressing component is positioned on one side of the pressure head far away from the carrier,

the pressing assembly is used for pressing the pressing head, so that the pressing head presses the reinforcing sheet into the injection molding groove through the pressing cavity.

2. The press-in jig according to claim 1, wherein the press-in cavity comprises a first cavity and a second cavity, the first cavity is close to the fixing portion, the second cavity is far from the fixing portion, a convex portion is arranged on an inner wall of the first cavity, an inclined surface is arranged in a region of the convex portion close to the second cavity, and a tangent line of any point on the inclined surface forms an obtuse angle with the inner wall of the second cavity.

3. The press-in jig of claim 2, wherein the carrier includes a first shaping block and a second shaping block detachably connected, the first shaping block including a first surface and a second surface oppositely disposed and a first side surface connecting the first surface and the second surface,

the second shaping block includes third and fourth surfaces disposed opposite to each other and a second side surface connecting the third and fourth surfaces,

the first side surface and the second side surface jointly enclose the press-in cavity, the convex part is located on the first side surface, the second side surface is provided with a concave part corresponding to the convex part, and the convex part and the concave part enclose the first cavity.

4. The press-in jig according to claim 3, wherein the first surface is convex in a direction away from the second surface to form a first positioning portion, and the second side surface is extended in a direction away from the fourth surface to form a second positioning portion.

5. The press-in jig according to claim 1, wherein the pressing member includes a support, a retractable block, a pressing block, a cam shaft, and a cam, the support includes two support arms disposed on the base and disposed opposite to each other, a cross beam disposed on the two support arms, two vertical plates disposed on the cross beam, and a cross plate disposed on the two vertical plates, the retractable block movably penetrates through the cross beam, the pressing block is disposed at one end of the retractable block close to the pressing head, the cam shaft is rotatably disposed on the vertical plates and located at one side of the retractable block away from the pressing head, and the cam is fixed on the cam shaft.

6. The press-in jig according to claim 5, wherein the press-in assembly further comprises a guide rod and a return spring, one end of the guide rod is fixed on the telescopic block, the other end of the guide rod movably penetrates through the cross beam, and the return spring is sleeved on one end, far away from the lower pressing block, of the guide rod.

7. The press-in jig according to claim 5, wherein a plurality of cams are provided on the cam rotating shaft, each cam corresponding to one of the telescopic block and one of the pressing block;

the pressing assembly further comprises a pressing handle and two limiting columns, the pressing handle is located on each vertical plate, the pressing handles are fixed to the two ends of the cam rotating shaft, and the limiting columns correspond to the pressing handles.

8. The pressing jig according to claim 2, wherein the pressing head comprises a pressing piece and a pressing portion located at one end of the pressing piece, and a clearance groove is formed at one end of the pressing piece, which is far away from the pressing portion.

9. A workpiece prepared by using the press-in jig according to any one of claims 1 to 8, wherein the workpiece comprises a housing, an injection molding groove formed in the housing, and a reinforcing sheet formed in the injection molding groove.

10. A workpiece prepared by adopting the press-in jig according to any one of claims 2 to 8, wherein the workpiece comprises a shell, an injection molding groove on the shell, a reinforcing sheet in the injection molding groove and a limiting block, the limiting block is positioned on the inner wall of an opening of the injection molding groove, the limiting block is used for fixing the reinforcing sheet, and the reinforcing sheet has elasticity.

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