Automobile sign, forming mold and forming method

Abstract

The present application discloses an automobile sign, a molding die and a molding method, comprising a decorative component, an insert and a base, wherein the decorative component and the base are connected to each other, the base is suitable for connecting to a vehicle body, the insert is embedded between the decorative component and the base, a first connecting portion is arranged on the peripheral side of the decorative component, a second connecting portion is arranged on the peripheral side of the base, the first connecting portion and the second connecting portion are suitable for hoop-embedded connection, a fitting gap is formed between the first connecting portion and the second connecting portion, the insert is suitable for filling the fitting gap to make the first connecting portion and the second connecting portion tightly combined in a first direction, the automobile sign of the present application has a stable structure and is not prone to hollowing or detachment.

Description

Technical Field

[0001] The present application relates to the technical field of mold equipment, and in particular to an automobile sign, a molding mold, and a molding method. Background Art

[0002] Adaptive cruise control, abbreviated as ACC, is an intelligent automatic control system. A radar is installed in front of the vehicle to detect the road conditions ahead, and then the speed is adjusted through the control system to adapt to the traffic conditions, effectively reducing traffic accidents. Unlike reversing radar, it can detect objects more than 100 meters away and has the ability to penetrate fog, smoke and dust. For glass, plastic and porcelain, microwaves almost completely pass through without being absorbed, but will be reflected when encountering metal substances.

[0003] The current adaptive cruise control ACC system has very strict requirements on the attenuation of radar waves. In order to ensure driving safety, the ACC sign must ensure that the attenuation of the ACC system can be stably controlled within the required range. The ACC sign is generally installed on the front grille of the vehicle, covering the front radar of the ACC system, and it is required that the transmission and reception of radar waves cannot be hindered in the area where the radar waves pass.

[0004] However, existing car signs have the following defects: Since the ACC sign needs to be designed based on the car brand's logo, it usually has a three-dimensional shape requirement, which leads to uneven wall thickness of the ACC sign. The various parts of the car sign produced by traditional manufacturing processes are prone to loose bonding, hollowing, or even detachment. Summary of the invention

[0005] One purpose of the present application is to provide a structurally stable automobile sign, a molding die, and a molding method.

[0006] In order to achieve the above objectives, the technical solution adopted in the present application is: a car sign, comprising a decorative component, an insert and a base, the decorative component and the base are connected to each other, the base is suitable for connecting to a vehicle body, the insert is embedded between the decorative component and the base, a first connecting part is provided on the peripheral side of the decorative component, a second connecting part is provided on the peripheral side of the base, the first connecting part and the second connecting part are suitable for hoop-embedded connection, a fitting gap is formed between the first connecting part and the second connecting part, and the insert is suitable for filling the fitting gap to make the first connecting part and the second connecting part tightly combined in a first direction.

[0007] In some embodiments, the decorative component includes a first decorative piece and a second decorative piece, the first decorative piece and the second decorative piece are arranged in a stacked manner along the layout direction of the insert and the base, the second decorative piece is located between the first decorative piece and the insert, and the insert is provided with a plurality of raised engaging portions, the engaging portions are suitable for being engaged and connected with the first decorative piece on both sides of the second decorative piece to limit the movement of the second decorative piece relative to the first decorative piece.

[0008] In some embodiments, a molding groove is formed on the peripheral side of the first decorative piece, the first connecting portion is molded in the molding groove, and the first decorative piece and the insert are suitable for clamping and restricting the first connecting portion along both sides of the layout direction.

[0009] In some embodiments, at least one raised engaging portion is provided on the insert, and the engaging portion is suitable for being engaged and connected with the decorative component near the fitting gap, and the engaging portion is suitable for contacting the first connecting portion on the side of the first connecting portion away from the second connecting portion, so as to make the first connecting portion and the second connecting portion tightly combined in the second direction.

[0010] In some embodiments, the shrinkage rate of the insert is smaller than that of the decorative component, and the shrinkage rate of the insert is smaller than that of the base; the joining surface between the insert and the base is a flat surface, and the side of the base away from the insert is a flat surface.

[0011] A car sign molding die, comprising a first die, a second die and a third die, wherein the first die is suitable for molding a decorative component, the second die is suitable for molding an insert on the decorative component, and the third die is suitable for molding a base on the insert;

[0012] Among them, the second mold is provided with at least one exhaust block on the side away from the decorative component and the third mold is provided with a side away from the insert, a plurality of exhaust cores are embedded in the exhaust block, and the exhaust core is provided with a first exhaust channel and a second exhaust channel, the first exhaust channel is suitable for connecting the cavity of the second mold and the second exhaust channel, or the cavity of the third mold and the second exhaust channel, and the second exhaust channel on the exhaust core is suitable for connecting with each other and with the exhaust hole of the exhaust block.

[0013] In some embodiments, the first exhaust channel includes a plurality of first exhaust grooves and second exhaust grooves, the first exhaust grooves and the second exhaust grooves are opened on the surface of the exhaust core, one end of the first exhaust groove is connected to the cavity of the second mold or the cavity of the third mold, the second exhaust groove is connected to the first exhaust groove, the second exhaust groove is connected to the second exhaust channel, the exhaust volume per unit time of the second exhaust groove is greater than the exhaust volume per unit time of the first exhaust groove; the first exhaust grooves and the second exhaust grooves are cross-distributed, and the second exhaust groove at least penetrates each of the first exhaust grooves; the exhaust volume of the second exhaust channel is greater than the exhaust volume of the second exhaust groove; the exhaust insert and the exhaust core are suitable for assisting in molding the flat surface of the insert away from the decorative component side, and the flat surface of the base away from the insert side.

[0014] In some embodiments, the third mold includes a core group, which is suitable for molding the snap-on structure on the base. The core group includes a slider, a first guide mechanism and a second guide mechanism. The slider is arranged on the first guide mechanism, and the second guide mechanism is suitable for guiding the slider to slide along the first guide mechanism when opening the mold, so that the slider slides and disengages along the flat surface of the base away from the insert.

[0015] A method for forming an automobile sign comprises the following steps:

[0016] S100, designing a first cavity, and forming a first decorative part in the first cavity;

[0017] S200, designing a second cavity, placing the first decorative piece in the second cavity, and molding the second decorative piece and the first connecting portion on the first decorative piece;

[0018] S300, designing a third cavity, placing the decorative component into one side of the third cavity, arranging an exhaust insert on the other side of the third cavity, and then forming an insert on the decorative component, and taking it out after the insert is shrunk;

[0019] S400, design the fourth cavity, place the decorative component and the insert into one side of the fourth cavity, arrange the exhaust insert on the other side of the fourth cavity, and then form a base on the insert, and take it out after the base is shrunk.

[0020] In some embodiments, the second decorative piece and the first connecting portion are simultaneously molded on the first decorative piece; the exhaust insert in the third cavity is arranged at least in the middle position and on each side of the decorative component; the exhaust insert in the fourth cavity is arranged at least in the middle position of the insert and extends to cover the peripheral side.

[0021] Compared with the prior art, the beneficial effects of this application are:

[0022] 1. The automobile sign of the present application optimizes the structure, adds an insert between the decorative component and the base for filling, and optimizes the interlocking form between the decorative component, the insert and the base, thereby improving the connection stability between the decorative component and the base and reducing the phenomenon of loose bonding, hollowing or even detachment between the decorative component and the base.

[0023] 2. The automobile sign of the present application optimizes material properties, improves the bonding strength between the decorative component and the insert, and between the insert and the base based on the structural coordination between the decorative component, the insert and the base, improves structural stability, and reduces the occurrence of loose bonding, hollowing, and even detachment.

[0024] 3. The molding mold of the present application is provided with a venting insert to help the insert and the base to be formed quickly and stably as a whole, and venting and cold shrinkage enhancement are performed on the positions that are prone to hollowing and detachment between the decorative component and the insert and between the insert and the base to improve the stability after combination.

[0025] 4. The molding method of the present application helps the insert and the base to be molded quickly and stably as a whole by setting a vent insert, and performs venting enhancement and cold shrinkage enhancement on the locations that are prone to hollowing and detachment between the decorative component and the insert and between the insert and the base to improve the stability after combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a car sign according to a preferred embodiment of the present application.

[0027] Figure 2 is a cross-sectional view of a car sign according to a preferred embodiment of the present application.

[0028] Figure 3 A preferred embodiment of a car sign according to the present application is a car sign Figure 2 Magnified view at point a.

[0029] Figure 4 is an exploded view of a third mold according to a preferred embodiment of the present application.

[0030] Figure 5 is a cross-sectional view of a third mold according to a preferred embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the matching of the exhaust insert and the base according to a preferred embodiment of the present application.

[0032] Figure 7 It is a schematic structural diagram of an exhaust insert matched with a base according to a preferred embodiment of the present application.

[0033] Figure 8It is a schematic diagram of the matching of a core set and a car nameplate according to a preferred embodiment of the present application.

[0034] Fig. 9 is an exploded view of a second mold according to a preferred embodiment of the present application.

[0035] Fig.10 It is a schematic diagram of the matching of the exhaust block and the insert according to a preferred embodiment of the present application.

[0036] Fig.11 It is a schematic structural diagram of an exhaust insert matched with an insert according to a preferred embodiment of the present application.

[0037] Fig.12 is an exploded view of a first mold according to a preferred embodiment of the present application.

[0038] In the figure: 1. decorative component; 11. first connecting portion; 12. first decorative piece; 121. molding groove; 1211. bending portion; 13. second decorative piece; 2. insert; 21. fitting portion; 3. base; 31. snap-fit ​​structure; 32. second connecting portion; 4. fitting gap; 5. first mold; 51. first cavity; 52. second cavity; 6. second mold; 61. third cavity; 7. third mold; 71. fourth cavity; 72. core group; 721. slider; 722. first guide mechanism; 723. second guide mechanism; 8. exhaust insert; 81. exhaust core; 811. first exhaust channel; 8111. first exhaust groove; 8112. second exhaust groove; 812. second exhaust channel; 82. exhaust hole. DETAILED DESCRIPTION

[0039] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0040] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0041] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0042] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0043] The present application is further described below with reference to the accompanying drawings:

[0044] like Figures 1 to 12 As shown, the present application provides a car sign, including a decorative component 1, an insert 2 and a base 3. The decorative component 1 and the base 3 are connected to each other, and a snap structure 31 is provided on the side of the base 3 away from the decorative component 1. The base 3 is suitable for connecting to the vehicle body through the snap structure 31, and the insert 2 is embedded between the decorative component 1 and the base 3.

[0045] A first connection portion 11 is provided on the peripheral side of the decorative component 1, and a second connection portion 32 is provided on the peripheral side of the base 3. The first connection portion 11 and the second connection portion 32 are suitable for hoop-embedded connection. The hoop-embedded connection can improve the bonding strength and bonding stability of the first connection portion 11 and the second connection portion 32 by connecting and fixing the first connection portion 11 and the second connection portion 32 in multiple directions. A matching gap 4 is formed between the first connection portion 11 and the second connection portion 32. The insert 2 is suitable for filling the matching gap 4 to make the first connection portion 11 and the second connection portion 32 tightly combined in the first direction. Figure 3 It can be seen that in the traditional process, if the insert 2 is not used, a fitting gap 4 may appear between the first connection part 11 and the second connection part 32 due to factors such as molding errors and material properties, which may eventually cause hollowing and detachment between the decorative component 1 and the base 3. In the present application, by adding an insert 2 and enlarging the size of the fitting gap 4, the insert 2 can effectively and accurately fill the fitting gap 4, thereby reducing the probability of loosening and detachment between the first connection part 11 and the second connection part 32, and improving the tightness of the connection between the first connection part 11 and the second connection part 32.

[0046] In the present application, the first direction generally refers to the direction in which the decorative component 1 and the base 3 are prone to hollowing, disengagement, etc. due to the matching gap 4. Figure 3In the embodiment, the fitting gap 4 causes the first connection part 11 and the second connection part 32 to loosen and displace in a direction close to the vertical direction. At this time, the first direction can be approximately regarded as the vertical direction. It can be understood that when the position of the fitting gap 4 changes, the first direction will also change adaptively.

[0047] like Figure 1 and 2 In the illustrated embodiment, the decoration assembly 1 includes a first decoration member 12 and a second decoration member 13, and the first decoration member 12 and the second decoration member 13 are stacked and arranged along the layout direction of the insert 2 and the base 3 (refer to Figure 2 As shown, it can be approximately regarded as the vertical direction), the second decorative piece 13 is located between the first decorative piece 12 and the insert 2, and a plurality of raised engaging portions 21 are provided on the insert 2, and the engaging portions 21 are suitable for being engaged and connected with the first decorative piece 12 on both sides of the second decorative piece 13 to limit the movement of the second decorative piece 13 relative to the first decorative piece 12, and the insert 2 can also limit the movement of the second decorative piece 13 relative to the first decorative piece 12 on a plurality of surfaces or directions where the second decorative piece 13 does not contact the first decorative piece 12, thereby helping to improve the connection stability between the first decorative piece 12 and the second decorative piece 13, reducing the probability of the first decorative piece 12 and the second decorative piece 13 loosening and detaching, and improving the stability of the overall structure of the automobile sign.

[0048] In some embodiments, the decoration component 1 is made of a transparent material, and the first decoration piece 12 and the second decoration piece 13 are configured with different colors, so that the decoration component 1 forms a two-color transparent piece.

[0049] like Figures 1 to 3 In the illustrated embodiment, the first connection portion 11 is secondary molded on the circumference of the first decorative piece 12. A molding groove 121 is provided on the circumference of the first decorative piece 12. The first connection portion 11 is molded in the molding groove 121. The molding groove 121 can increase the contact area between the first connection portion 11 and the first decorative piece 12, thereby increasing the tightness of the connection between the two. The first decorative piece 12 and the insert 2 are suitable for clamping and restricting the first connection portion 11 on both sides along the layout direction, that is, the first decorative piece 12 and the insert 2 can clamp and restrict the first connection portion 11 on the upper and lower sides respectively. By utilizing the clamping form of the first decorative piece 12 and the insert 2, the structural stability of the first connection portion 11 can be improved, thereby improving the connection stability between the first connection portion 11 and the second connection portion 32, and finally improving the connection stability between the first decorative piece 12 and the base 3.

[0050] like Figure 3In the illustrated embodiment, a plurality of bending portions 1211 with different bending directions are provided on the forming groove 121, and the bending portions 1211 have a smooth transition, which can further increase the contact area between the first connecting portion 11 and the first decorative component 12, effectively increase the connection strength between the first connecting portion 11 and the first decorative component 12, and reduce the probability of the first connecting portion 11 being separated from the first decorative component 12.

[0051] like Figure 2 and 3 In the illustrated embodiment, at least one raised engaging portion 21 is provided on the insert 2, and the engaging portion 21 is suitable for being engaged and connected with the decorative component 1 near the fitting gap 4, and the engaging portion 21 is suitable for contacting the first connecting portion 11 on the side of the first connecting portion 11 away from the second connecting portion 32, so as to make the first connecting portion 11 and the second connecting portion 32 tightly combined in the second direction.

[0052] In some embodiments, the shrinkage rate of the insert 2 is smaller than that of the decorative component 1, and the shrinkage rate of the insert 2 is smaller than that of the base 3. It can be understood that the shrinkage rate of the insert 2 is smaller than that of the decorative component 1 and the base 3, which enables the insert 2 to be better encapsulated and bonded to the decorative component 1 and the base 3 to improve the tightness of the fit, and at the same time, enables the insert 2 to completely fill the fitting gap 4 formed by the decorative component 1 and the base 3, thereby reducing looseness and the like, and improving the connection stability between the decorative component 1 and the base 3.

[0053] In some embodiments, the cross-sections of the decorative component 1, the insert 2 and the base 3 are all arc-shaped structures, the insert 2 is bent toward the decorative component 1, and the base 3 is bent toward the insert 2. Combined with the setting of the shrinkage rate between the decorative component 1, the insert 2 and the base 3, the bonding tightness between the decorative component 1, the insert 2 and the base 3 can be further improved, and the probability of hollowing and loosening can be reduced.

[0054] like Figure 2 In the embodiment shown, the joint surface between the insert 2 and the base 3 is a flat surface, and the side of the base 3 away from the insert 2 is a flat surface, which is convenient for mold molding. Since the base 3 is molded after the insert 2, the impact of the shrinkage process of the base 3 on the insert 2 can be reduced, thereby improving the fit between the base 3 and the insert 2.

[0055] like Figures 4 to 12 As shown, the present application also provides a car sign molding mold, including a first mold 5, a second mold 6 and a third mold 7. The first mold 5 is suitable for molding the decorative component 1, the second mold 6 is suitable for molding the insert 2 on the decorative component 1, and the third mold 7 is suitable for molding the base 3 on the insert 2. The three molds are used to sequentially mold the decorative component 1, the insert 2 and the base 3 according to the structural arrangement order, and the structural stability between the decorative component 1, the insert 2 and the base 3 is improved by optimizing the molding sequence and the mold structure.

[0056] Among them, at least one exhaust block 8 is provided on the side of the second mold 6 away from the decorative component 1 and on the side of the third mold 7 away from the insert 2, and a plurality of exhaust cores 81 are embedded in the exhaust block 8. The exhaust core 81 is provided with a first exhaust channel 811 and a second exhaust channel 812. The first exhaust channel 811 is suitable for connecting the cavity and the second exhaust channel 812 of the second mold 6, or the cavity and the second exhaust channel 812 of the third mold 7. The second exhaust channel 812 on the exhaust core 81 is suitable for connecting with each other and connecting with the exhaust hole 82 of the exhaust block 8. The first exhaust channel 811 and the second exhaust channel 812 are used to help the product to be quickly exhausted, thereby improving the quality of product molding. The exhaust block 8 is located on the non-appearance side of the decorative component 1 and the insert 2, thereby reducing the influence of the molding structure of the exhaust block 8 on the appearance.

[0057] In some embodiments, the first exhaust channel 811 includes a plurality of first exhaust grooves 8111 and second exhaust grooves 8112, the first exhaust grooves 8111 and the second exhaust grooves 8112 are opened on the surface of the exhaust core 81, one end of the first exhaust groove 8111 is connected to the cavity of the second mold 6 or the cavity of the third mold 7, the second exhaust groove 8112 is connected to the first exhaust groove 8111, and the second exhaust groove 8112 is connected to the second exhaust channel 812, the exhaust volume per unit time of the second exhaust groove 8112 is greater than the exhaust volume per unit time of the first exhaust groove 8111, and the first exhaust grooves 8111 and the second exhaust grooves 8112 are opened on the surface of the exhaust core 81 for easy processing and size control, the width of the first exhaust groove 8111 can be processed smaller, reducing the entry of liquid at the first exhaust groove 8111, thereby reducing the generation of waste, and by increasing the exhaust volume of the second exhaust groove 8112, the gas in the first exhaust groove 8111 is guided and gathered, and discharged uniformly.

[0058] In some embodiments, the first exhaust groove 8111 and the second exhaust groove 8112 are opened on the surface of the exhaust core 81 on different sides. By exposing the exhaust structure, gas circulation can be achieved while reducing the difficulty of processing.

[0059] like Figure 7 In the illustrated embodiment, the first exhaust grooves 8111 and the second exhaust grooves 8112 are cross-distributed, and the second exhaust grooves 8112 at least penetrate each first exhaust groove 8111. The first exhaust grooves 8111 can store gas, and excess gas can enter the second exhaust grooves 8112 and then be guided to the second exhaust channel 812 for discharge.

[0060] like Fig.11 In the illustrated embodiment, the first exhaust groove 8111 and the second exhaust groove 8112 are partially overlapped and connected, and the first exhaust groove 8111 and the second exhaust groove 8112 are distinguished by the exhaust volume per unit time.

[0061] In some embodiments, the exhaust volume of the second exhaust channel 812 is greater than the exhaust volume of the second exhaust groove 8112, ensuring that the gas gathered in the exhaust groove can be effectively discharged by the second exhaust channel 812, reducing the probability of gas accumulation and aggregation.

[0062] like Figure 6 and 10 In the illustrated embodiment, the exhaust block 8 and the exhaust core 81 are suitable for assisting in forming the flat surface of the side of the molding insert 2 away from the decorative component 1, and the flat surface of the side of the base 3 away from the insert 2. The above flat surfaces are non-exterior surfaces. Since the exhaust core 81 is provided on the exhaust block 8, and the first exhaust grooves 8111 are provided between the exhaust cores 81, the existence of the first exhaust grooves 8111 will affect the appearance quality of the decorative component 1 and the base 3. Arranging the exhaust block 8 on the flat surface can facilitate subsequent residual material processing. At the same time, being located on the non-exterior surface can also reduce the impact on the appearance. At the same time, since it can also increase the coverage area of ​​the exhaust structure, the exhaust efficiency is improved.

[0063] In some embodiments, the thermal conductivity coefficients of the exhaust insert 8 and the exhaust core 81 are greater than those of the third mold 7 and the fourth mold, and the absorbed heat can achieve a certain heat dissipation effect during the exhaust of the exhaust core 81 .

[0064] In some embodiments, the third mold 7 includes a core group 72, which is suitable for the snap-fit ​​structure 31 on the molding base 3. The core group 72 includes a slider 721, a first guide mechanism 722 and a second guide mechanism 723. The slider 721 is arranged on the first guide mechanism 722, and the second guide mechanism 723 is suitable for guiding the slider 721 to slide along the first guide mechanism 722 when opening the mold, so that the slider 721 slides and disengages along the flat surface of the base 3 away from the insert 2, thereby ensuring smooth mold opening and reducing structural interference.

[0065] In some embodiments, the first guide mechanism 722 is a guide block, and the second guide mechanism 723 is a guide rod.

[0066] like Figures 4 to 12 As shown, the present application also provides a method for forming a car sign, comprising the steps of:

[0067] S100, designing a first cavity 51, and forming a first decorative element 12 in the first cavity 51;

[0068] S200, designing a second cavity 52, placing the first decorative element 12 into the second cavity 52, and molding the second decorative element 13 and the first connecting portion 11 on the first decorative element 12;

[0069] S300, designing a third cavity 61, placing the decorative component 1 into one side of the third cavity 61, arranging the exhaust insert 8 on the other side of the third cavity 61, and then molding the insert 2 on the decorative component 1, and taking it out after the insert 2 is shrunk;

[0070] S400, designing the fourth cavity 71, placing the decorative component 1 and the insert 2 into one side of the fourth cavity 71, arranging the exhaust insert 8 on the other side of the fourth cavity 71, and then forming the base 3 on the insert 2, and taking out the base 3 after the shrinkage is completed.

[0071] In some embodiments, the second decorative member 13 and the first connecting portion 11 are simultaneously molded on the first decorative member 12 , thereby reducing the number of cavities and improving molding efficiency.

[0072] like Fig.10 In the illustrated embodiment, the exhaust insert 8 in the third cavity 61 is arranged at least in the middle position and on each side of the decorative component 1. The exhaust insert 8 can perform targeted exhaust on the molding of the insert 2, improve the molding quality of key positions, and improve the tightness of the combination of the insert 2 and the decorative component 1 around and in the middle.

[0073] like Figure 6 In the illustrated embodiment, the exhaust insert 8 in the fourth cavity 71 is arranged at least in the middle position of the insert 2 and extends to cover the circumferential side. The exhaust insert 8 can perform targeted exhaust on the molding of the base 3, improve the molding quality of the key position, and improve the fit between the insert 2 and the base 3.

[0074] The above describes the basic principles, main features and advantages of the present application. Technical personnel in this industry should understand that the present application is not limited to the above embodiments. The above embodiments and the specification only describe the principles of the present application. Without departing from the spirit and scope of the present application, the present application will also have various changes and improvements. These changes and improvements all fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A method for forming a car sign, characterized in that: The automobile sign comprises a decorative component, an insert and a base, wherein the decorative component and the base are connected to each other, the base is suitable for connecting to a vehicle body, the insert is embedded between the decorative component and the base, a first connecting portion is provided on the peripheral side of the decorative component, a second connecting portion is provided on the peripheral side of the base, the first connecting portion and the second connecting portion are suitable for hoop-embedded connection, a matching gap is formed between the first connecting portion and the second connecting portion, and the insert is suitable for filling the matching gap to make the first connecting portion and the second connecting portion tightly combined in a first direction, and the first direction is the direction in which hollowing and disengagement occur between the decorative component and the base; The decorative component comprises a first decorative piece and a second decorative piece, wherein the first decorative piece and the second decorative piece are stacked along the arrangement direction of the insert and the base, and the second decorative piece is located between the first decorative piece and the insert, and the insert is provided with a plurality of raised engaging portions, wherein the engaging portions are adapted to be engaged with the first decorative piece at both sides of the second decorative piece to limit the movement of the second decorative piece relative to the first decorative piece; The molding method comprises the steps of: S100, designing a first cavity, and forming a first decorative part in the first cavity; S200, designing a second cavity, placing the first decorative piece in the second cavity, and molding the second decorative piece and the first connecting portion on the first decorative piece; S300, designing a third cavity, placing the decorative component into one side of the third cavity, arranging an exhaust insert on the other side of the third cavity, and then forming an insert on the decorative component, and taking it out after the insert is shrunk; S400, designing the fourth cavity, placing the decorative component and the insert into one side of the fourth cavity, arranging the exhaust insert on the other side of the fourth cavity, and then forming a base on the insert, and taking it out after the base is shrunk; The first cavity and the second cavity are located in the first mold, the third cavity is located in the second mold, and the fourth cavity is located in the third mold, the first mold is suitable for molding a decorative component, the second mold is suitable for molding an insert on the decorative component, and the third mold is suitable for molding a base on the insert; The second mold is provided with at least one exhaust block on a side away from the decorative component and on a side away from the insert of the third mold, a plurality of exhaust cores are embedded in the exhaust block, a first exhaust channel and a second exhaust channel are opened on the exhaust core, the first exhaust channel is suitable for connecting the mold cavity of the second mold and the second exhaust channel, or the mold cavity of the third mold and the second exhaust channel, and the second exhaust channel on the exhaust core is suitable for connecting with each other and connecting with the exhaust hole of the exhaust block; The first exhaust channel includes a plurality of first exhaust grooves and second exhaust grooves, the first exhaust grooves and the second exhaust grooves are provided on the surface of the exhaust core, one end of the first exhaust groove is connected to the cavity of the second mold or the cavity of the third mold, the second exhaust groove is connected to the first exhaust groove, the second exhaust groove is connected to the second exhaust channel, and the exhaust volume per unit time of the second exhaust groove is greater than the exhaust volume per unit time of the first exhaust groove; the first exhaust grooves and the second exhaust grooves are cross-distributed, and the second exhaust grooves penetrate each of the first exhaust grooves; the exhaust volume of the second exhaust channel is greater than the exhaust volume of the second exhaust groove; the exhaust insert and the exhaust core are suitable for assisting in molding the flat surface of the insert away from the decorative component, and the flat surface of the base away from the insert; The shrinkage rate of the insert is smaller than that of the decorative component, and the shrinkage rate of the insert is smaller than that of the base; the joint surface between the insert and the base is a flat surface, and the side of the base away from the insert is a flat surface; The second decorative piece and the first connecting portion are simultaneously formed on the first decorative piece; the exhaust insert in the third cavity is arranged in the middle position and on each side of the decorative component; the exhaust insert in the fourth cavity is arranged in the middle position of the insert and extends to cover the circumference.

2. A method for forming an automobile sign as claimed in claim 1, characterized in that: A molding groove is formed on the peripheral side of the first decorative piece, and the first connecting portion is molded in the molding groove. The first decorative piece and the insert are suitable for clamping and restricting the first connecting portion in cooperation along both sides of the layout direction.

3. A method for forming a car sign as claimed in claim 1, characterized in that: At least one raised engaging portion is provided on the insert, and the engaging portion is suitable for being engaged and connected with the decorative component near the fitting gap, and the engaging portion is suitable for contacting the first connecting portion on the side of the first connecting portion away from the second connecting portion, so as to make the first connecting portion and the second connecting portion tightly combined in the second direction.

4. A method for forming a car sign as claimed in claim 1, characterized in that: The third mold includes a core group, which is suitable for molding the snap-on structure on the base. The core group includes a slider, a first guide mechanism and a second guide mechanism. The slider is arranged on the first guide mechanism, and the second guide mechanism is suitable for guiding the slider to slide along the first guide mechanism when opening the mold, so that the slider slides and disengages along the flat surface of the base away from the insert.

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