Double-color automobile decorating part and forming mold and method thereof

Abstract

The invention discloses a double-color automobile decorating part and a forming mold and method thereof, and relates to the technical field of automobile decorating part forming, the double-color automobile decorating part comprises a fixed mold, a movable mold, multiple mold core assemblies, a first mold cavity, a second mold cavity, a first injection molding hole and a second injection molding hole, the movable mold is arranged above the fixed mold, and the multiple mold core assemblies are installed at the top of the fixed mold; the first mold cavity is installed among the multiple mold core assemblies, the multiple second mold cavities are formed in the bottom of the movable mold, the first injection molding hole is formed in the middle of the movable mold, and the multiple second injection molding holes are formed in the top of the movable mold in an annular array mode. The arrangement mode that the fixed mold, the movable mold, the mold core assembly, the first mold cavity and the second mold cavity are matched is utilized, the mold core assembly adopts the multi-mold-core body layout, melt flow optimization is achieved through connecting holes, it is ensured that materials are evenly distributed during double-color injection molding, the sealing assembly adopts an electric telescopic rod to drive a sealing plate, and the sealing effect is good. And the runner is automatically closed or opened during injection molding color switching, so that color mixing is avoided, and melt leakage is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile decorative part molding, and in particular to a two-color automobile decorative part and a molding die and a molding method thereof. Background Art

[0002] In the automotive interior manufacturing sector, two-shot injection molding technology is widely used in the production of decorative parts such as cup holders, instrument panel trims, and door panel trims to meet aesthetic, functional, and personalized requirements. Traditional two-shot injection molds typically use a rotating core or slider structure to achieve two-shot injection.

[0003] Existing two-color automotive decorative parts are composed of a first injection-molded part and a second injection-molded part made of different materials, and the first injection-molded part and the second injection-molded part are fused through two joint surfaces that are not at the same angle. However, when the mold is in use, deviations are prone to occur when the mold core rotates or the mold is closed, resulting in color difference, overflow or insufficient bonding strength in the two-color injection-molded parts, resulting in insufficient mold positioning accuracy. In addition, when switching between different colors of melt, the sealing component is prone to leakage, resulting in color mixing or uneven filling, affecting the stability of the two-color automotive decorative parts. Summary of the Invention

[0004] The object of the present invention is to provide a two-color automobile decorative part and its forming mold and method to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a two-color automobile decorative part forming mold, comprising:

[0006] Fixed mold;

[0007] A movable mold, the movable mold being arranged above the fixed mold;

[0008] A mold core assembly, wherein a plurality of the mold core assemblies are installed on the top of the fixed mold;

[0009] A first mold cavity, wherein the first mold cavity is installed between multiple mold core assemblies and is used to connect the inner cavities of the multiple mold core assemblies;

[0010] A second mold cavity, wherein a plurality of the second mold cavities are opened at the bottom of the movable mold;

[0011] A first injection hole is provided in the middle of the movable mold and is used for injecting molten liquid into the first mold cavity;

[0012] Second injection holes, multiple second injection holes are opened in a ring array on the top of the movable mold, and the second injection holes are used for pouring molten liquid into the second mold cavity.

[0013] Preferably, a clamping mechanism is installed between the fixed mold and the movable mold, and the clamping mechanism includes:

[0014] A positioning column, the positioning column being installed on the outer wall of the fixed mold;

[0015] A connecting post fixed to the outer wall of the movable mold;

[0016] A clamping plate, which is rotatably inserted into the middle of the connecting column and is movably engaged with the outer wall of the positioning column;

[0017] A connecting component is installed at one end of the card.

[0018] Preferably, the connection assembly includes:

[0019] A fixing ring, the fixing ring being fixed to the outer wall of the clamping plate;

[0020] A connecting ring, the connecting ring being inserted into the inner cavity of the fixing ring;

[0021] A positioning block, the positioning block being fixed to the top of the movable mold;

[0022] A pressing and pulling rod is slidably inserted into the inner cavity of the positioning block, and the bottom of the pressing and pulling rod is fixedly connected to the top of the connecting ring.

[0023] Preferably, the mold core assembly includes:

[0024] A mold core body, wherein a plurality of the mold core bodies are fixed on the top of the fixed mold;

[0025] The connecting holes are opened on the side of the mold body, and a plurality of the connecting holes are opened on the opposite side of the mold body, and the connecting holes are communicated with the inner cavity of the first mold cavity.

[0026] Preferably, the first mold cavity comprises:

[0027] a first cavity, the first cavity being opened in the middle of the fixed mold;

[0028] A second cavity, wherein a plurality of the second cavities are opened on the side of the first cavity in a state of being opposite to each other in pairs;

[0029] a blocking assembly, the blocking assembly being disposed at an end of the second cavity;

[0030] A movable groove is provided at the bottom of the fixed mold and below the first cavity;

[0031] An electric telescopic rod, the electric telescopic rod being fixedly inserted into the middle of the movable slot;

[0032] The bracket is fixed to the middle part of the electric telescopic rod and is connected to multiple blocking components.

[0033] Preferably, the blocking component comprises:

[0034] A limiting tube fixed to a side of the movable groove;

[0035] A sealing plate, the sealing plate being slidably interpenetratingly connected with the inner cavity of the limiting tube;

[0036] The card slot is opened on the top of the limiting tube.

[0037] Preferably, the sealing plate is connected to the corners of the movable groove by sliding and inserting, and the top of the sealing plate is connected to the inner cavity of the second cavity by sliding and inserting, and the sealing plate is used to seal the inner cavity of the second cavity.

[0038] Preferably, the bracket is fixed to the middle of the plurality of sealing plates, and the second cavity is communicated with the inner cavity of the connecting hole.

[0039] The present invention also provides a method for using a two-color automobile decorative part forming mold, comprising the following specific steps:

[0040] Step 1: Press the movable mold onto the top of the fixed mold, and press the pull rod downward so that its clamping plate can engage with the outer wall of the positioning column, so that its second mold cavity can be pressed onto the top of the mold core assembly to form the first casting cavity;

[0041] Step 2: driving the electric telescopic rod so that the bracket can push up in the inner cavity of the movable groove, and the sealing plate slides in the inner cavity of the limiting tube so that the multiple sealing plates can seal the inner cavity of the second cavity, so that the connecting hole and the inner cavity of the second cavity can be blocked;

[0042] Step three: pour the injection melt into the inner cavity of multiple second injection holes so that the melt can enter the inner cavity of the second mold cavity for injection molding of the decoration, and the melt enters the inner cavity of the connecting hole, and the melt in the inner cavity of the first casting cavity can be cooled and formed through the cooling system on the fixed mold and the movable mold, and the electric telescopic rod is driven in the reverse direction to slide down the sealing plate, and then another color of melt is injected into the inner cavity of the first injection hole so that the melt can enter the inner cavity of the first cavity, and the melt passes through the inner cavity of the second cavity to connect with the casting body formed in the inner cavity of the connecting hole, and again through the cooling system on the fixed mold and the movable mold, the two-color decorative parts can be injection molded.

[0043] Another object of the present invention is to provide a two-color automobile decorative part, which comprises a product injection molded by the method for using the two-color automobile decorative part molding mold according to claim 9.

[0044] Technical effects and advantages of the present invention:

[0045] (1) The present invention utilizes a setting method in which a fixed mold, a movable mold, a mold core assembly, a first mold cavity and a second mold cavity are matched with each other, and adopts a clamping mechanism to ensure that the fixed mold and the movable mold fit tightly and reduce mold clamping deviation. The mold core assembly adopts a multi-mold core body layout and optimizes the molten liquid flow through connecting holes to ensure uniform material distribution during two-color injection molding. The sealing assembly adopts an electric telescopic rod to drive the sealing plate, which automatically closes or opens the flow channel when switching the injection molding color to avoid color mixing and prevent molten liquid leakage.

[0046] (2) The present invention utilizes a lever-type design of a connecting assembly with a press-pull rod and a connecting ring, which makes it easier to disassemble and assemble the mold, while improving the mold closing stability. The structure of the limiting tube and the card slot ensures the stable movement of the sealing plate, improves the sealing reliability, improves the stability of the molding of two-color automotive decorative parts, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0048] Figure 2 It is a schematic diagram of the upward structure of the fixed mold of the present invention.

[0049] Figure 3 It is a schematic diagram of the overall side structure of the present invention.

[0050] Figure 4 For the present invention Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0051] Figure 5 For the present invention Figure 3 Schematic diagram of the locally enlarged structure at point B in the middle.

[0052] Figure 6 It is a schematic diagram of the front structure of the card plate of the present invention.

[0053] Figure 7 This is a schematic diagram of the overall structure of the two-color automobile decorative part of the present invention.

[0054] In the figure: 100, fixed mold; 200, movable mold; 300, mold core assembly; 301, mold core body; 302, connecting hole; 400, first mold cavity; 401, first cavity; 402, second cavity; 403, blocking assembly; 431, limiting tube; 432, sealing plate; 433, clamping slot; 404, movable slot; 405, electric telescopic rod; 406, bracket; 500, second mold cavity; 600, first injection hole; 700, second injection hole; 800, clamping mechanism; 801, positioning column; 802, connecting column; 803, clamping plate; 804, connecting assembly; 841, fixing ring; 842, connecting ring; 843, positioning block; 844, pressing and pulling rod. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] The present invention provides Figure 1-6 The mold for forming a two-color automobile decorative part shown in the figure includes a fixed mold 100, a movable mold 200, a mold core assembly 300, a first mold cavity 400, a second mold cavity 500, a first injection hole 600 and a second injection hole 700. The movable mold 200 is arranged above the fixed mold 100. The fixed mold 100 and the movable mold 200 are both equipped with a cooling system. Multiple mold core assemblies 300 are installed on the top of the fixed mold 100. The first mold cavity 400 is installed between the multiple mold core assemblies 300. The first mold cavity 400 is used to connect the inner cavities of multiple mold core assemblies 300. Multiple second mold cavities 500 are opened on the movable mold 200. At the bottom, when the fixed mold 100 is attached to the movable mold 200, the second mold cavity 500 covers the upper part of the mold core assembly 300, so that the second mold cavity 500 and the mold core assembly 300 form a first casting cavity. The first injection hole 600 is opened in the middle of the movable mold 200. The first injection hole 600 is used for pouring the molten liquid in the inner cavity of the first mold cavity 400. A plurality of second injection holes 700 are opened in a circular array on the top of the movable mold 200. The second injection hole 700 is used for pouring the molten liquid in the inner cavity of the second mold cavity 500. The first injection hole 600 and the second injection hole 700 are respectively used for pouring two colors of molten liquid.

[0057] At the same time, a clamping mechanism 800 is installed between the fixed mold 100 and the movable mold 200. The clamping mechanism 800 includes a positioning column 801, a connecting column 802, a clamping plate 803 and a connecting component 804. The positioning column 801 is installed on the outer wall of the fixed mold 100, and the connecting column 802 is fixed to the outer wall of the movable mold 200. The clamping plate 803 is rotated and inserted into the middle of the connecting column 802. The clamping plate 803 is movably clamped with the outer wall of the positioning column 801. The connecting component 804 is installed at one end of the clamping plate 803. Through the clamping connection between the clamping plate 803 and the positioning column 801, it is convenient to realize the clamping limitation between the fixed mold 100 and the movable mold 200, and to improve the connection stability between the fixed mold 100 and the movable mold 200.

[0058] The connecting assembly 804 includes a fixing ring 841, a connecting ring 842, a positioning block 843 and a pressing rod 844. The fixing ring 841 is fixed to the outer wall of the card plate 803, the connecting ring 842 is inserted into the inner cavity of the fixing ring 841, the positioning block 843 is fixed to the top of the movable mold 200, the pressing rod 844 is slidably inserted into the inner cavity of the positioning block 843, and the bottom of the pressing rod 844 is fixedly connected to the top of the connecting ring 842. The fixing ring 841 is an annular structure, so that the connecting ring 842 has a movable space in the inner cavity of the fixing ring 841, so that the card plate 80 The connecting rod 802 can be moved at a certain angle with the connecting column 802 as the axis. By pulling the pressing rod 844, the connecting ring 842 is pulled, so that the clamping plate 803 is driven by the fixing ring 841 to rotate and move upward with the connecting column 802 as the axis, which facilitates the disassembly and assembly between the clamping plate 803 and the positioning column 801. Moreover, by pressing the pressing rod 844 downward, the connecting ring 842 can push the outer wall of the clamping plate 803, which facilitates the clamping connection between the clamping plate 803 and the outer wall of the positioning column 801, thereby improving the stability of the position between the fixed mold 100 and the movable mold 200.

[0059] Among them, the mold core assembly 300 includes a mold core body 301 and a connecting hole 302. Multiple mold core bodies 301 are fixed on the top of the fixed mold 100. The connecting hole 302 is opened on the side of the mold core body 301, and multiple connecting holes 302 are opened on the opposite side of the multiple mold core bodies 301. The connecting hole 302 is communicated with the inner cavity of the first mold cavity 400, so that when the second mold cavity 500 covers the top of the mold core body 301, the molten liquid can be poured into the inner cavity of the second mold cavity 500 and above the mold core body 301, and the molten liquid can enter the inner cavity of the connecting hole 302.

[0060] In addition, the first mold cavity 400 includes a first cavity 401, a second cavity 402, a blocking component 403, a movable groove 404, an electric telescopic rod 405 and a bracket 406. The first cavity 401 is opened in the middle of the fixed mold 100, and the plurality of second cavities 402 are opened on the side of the first cavity 401 in a state of being opposite to each other. The first cavity 401 and the plurality of second cavities 402 form a second casting cavity. The blocking component 403 is arranged at the end of the second cavity 402. The second cavity 402 is connected to the connecting hole 30 2, the inner cavities of the first casting cavity and the second casting cavity are communicated, the blocking component 403 realizes the blocking of the first casting cavity and the second casting cavity, the movable groove 404 is opened at the bottom of the fixed mold 100, the movable groove 404 is opened below the first cavity 401, the electric telescopic rod 405 is fixedly inserted in the middle of the movable groove 404, the bracket 406 is fixed in the middle of the electric telescopic rod 405, the bracket 406 is connected to the multiple blocking components 403, and the electric telescopic rod 405 is electrically connected to the external power supply through an external switch.

[0061] Furthermore, the sealing assembly 403 includes a limiting tube 431, a sealing plate 432 and a card slot 433. The limiting tube 431 is fixed to the side of the movable slot 404, the sealing plate 432 is slidably and interlaced with the inner cavity of the limiting tube 431, the card slot 433 is opened at the top of the limiting tube 431, the sealing plate 432 is slidably and interlaced with the corners of the movable slot 404, the top of the sealing plate 432 is slidably and interlaced with the inner cavity of the second cavity 402, and the sealing plate 432 is used to seal the inner cavity of the second cavity 402. The bracket 406 is fixed to the middle of multiple sealing plates 432. Through the drive of the electric telescopic rod 405, the bracket 406 can drive the multiple sealing plates 432 to move up and down, and facilitate the sliding connection between the end of the bracket 406 and the inner cavity of the card slot 433, thereby improving the stability of the lifting and lowering of the sealing plate 432, and facilitating improving the stability of the sealing plate 432 in sealing the connecting hole 302 and the second cavity 402.

[0062] The present invention also provides a method for using a two-color automobile decorative part forming mold, comprising the following specific steps:

[0063] Step 1: Press the movable mold 200 onto the top of the fixed mold 100, and press the push rod 844 downward so that the clamping plate 803 can engage with the outer wall of the positioning column 801, so that the second mold cavity 500 can be pressed onto the top of the mold core assembly 300 to form the first casting cavity;

[0064] Step 2: Drive the electric telescopic rod 405 so that the bracket 406 can push up in the inner cavity of the movable groove 404, and the sealing plate 432 slides in the inner cavity of the limiting tube 431, so that the multiple sealing plates 432 can seal the inner cavity of the second cavity 402, so that the connecting hole 302 and the inner cavity of the second cavity 402 are blocked;

[0065] Step three: pour the injection molten liquid into the inner cavity of the multiple second injection holes 700 so that the molten liquid can enter the inner cavity of the second mold cavity 500 for injection molding of the decoration, and the molten liquid enters the inner cavity of the connecting hole 302. Through the cooling system on the fixed mold 100 and the movable mold 200, the molten liquid in the inner cavity of the first casting cavity can be cooled and formed. Then drive the electric telescopic rod 405 in the reverse direction to slide down the sealing plate 432, and then inject another color of molten liquid into the inner cavity of the first injection hole 600 so that the molten liquid can enter the inner cavity of the first cavity 401. The molten liquid passes through the inner cavity of the second cavity 402 and is connected to the casting body formed in the inner cavity of the connecting hole 302. Once again, through the cooling system on the fixed mold 100 and the movable mold 200, the two-color decorative part can be injection molded.

[0066] like Figure 7 As shown, this embodiment further provides a two-color automobile decorative part, which includes a product injection molded by the method for using the two-color automobile decorative part molding mold according to claim 9.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-color automobile decorative part forming mold, characterized in that: include: Fixed mold (100); A movable mold (200), wherein the movable mold (200) is arranged above the fixed mold (100); A mold core assembly (300), wherein a plurality of the mold core assemblies (300) are installed on the top of the fixed mold (100); A first mold cavity (400), wherein the first mold cavity (400) is installed between a plurality of mold core assemblies (300), and the first mold cavity (400) is used for connecting the inner cavities of the plurality of mold core assemblies (300); A second mold cavity (500), wherein a plurality of the second mold cavities (500) are opened at the bottom of the movable mold (200); A first injection hole (600), the first injection hole (600) is opened in the middle of the movable mold (200), and the first injection hole (600) is used for pouring molten liquid into the inner cavity of the first mold cavity (400); Second injection holes (700), a plurality of second injection holes (700) are opened in a circular array on the top of the movable mold (200), and the second injection holes (700) are used for pouring molten liquid into the inner cavity of the second mold cavity (500).

2. A two-color automobile decorative part forming mold according to claim 1, characterized in that: A clamping mechanism (800) is installed between the fixed mold (100) and the movable mold (200), and the clamping mechanism (800) includes: A positioning column (801), wherein the positioning column (801) is installed on the outer wall of the fixed mold (100); A connecting post (802), wherein the connecting post (802) is fixed to the outer wall of the movable mold (200); A clamping plate (803), the clamping plate (803) is rotatably inserted into the middle of the connecting column (802), and the clamping plate (803) is movably clamped with the outer wall of the positioning column (801); A connecting component (804) is installed on one end of the card plate (803).

3. A two-color automobile decorative part forming mold according to claim 2, characterized in that: The connection assembly (804) includes: A fixing ring (841), wherein the fixing ring (841) is fixed to the outer wall of the clamping plate (803); a connecting ring (842), the connecting ring (842) being inserted into the inner cavity of the fixing ring (841); A positioning block (843), wherein the positioning block (843) is fixed to the top of the movable mold (200); A pressing and pulling rod (844) is slidably inserted into the inner cavity of the positioning block (843), and the bottom of the pressing and pulling rod (844) is fixedly connected to the top of the connecting ring (842).

4. The two-color automobile decorative part forming mold according to claim 1, characterized in that: The mold core assembly (300) includes: A mold core body (301), wherein a plurality of the mold core bodies (301) are fixed on the top of the fixed mold (100); A connecting hole (302) is provided on the side of the mold core body (301), and a plurality of connecting holes (302) are provided on opposite sides of the mold core body (301), and the connecting hole (302) is communicated with the inner cavity of the first mold cavity (400).

5. The two-color automobile decorative part forming mold according to claim 4, characterized in that: The first mold cavity (400) comprises: A first cavity (401), wherein the first cavity (401) is opened in the middle of the fixed mold (100); A second cavity (402), wherein a plurality of the second cavities (402) are arranged in pairs opposite to each other and are opened on the side of the first cavity (401); a blocking component (403), the blocking component (403) being disposed at an end of the second cavity (402); A movable groove (404), the movable groove (404) is provided at the bottom of the fixed mold (100), and the movable groove (404) is provided below the first cavity (401); An electric telescopic rod (405), the electric telescopic rod (405) is fixedly inserted into the middle of the movable groove (404); A bracket (406) is fixed to the middle of the electric telescopic rod (405), and the bracket (406) is connected to a plurality of blocking components (403).

6. A two-color automobile decorative part forming mold according to claim 5, characterized in that: The blocking component (403) comprises: A limiting tube (431), wherein the limiting tube (431) is fixed to a side of the movable groove (404); A sealing plate (432), wherein the sealing plate (432) is slidably interpenetratingly connected with the inner cavity of the limiting tube (431); A card slot (433), wherein the card slot (433) is opened at the top of the limiting tube (431).

7. The two-color automobile decorative part forming mold according to claim 6, characterized in that: The sealing plate (432) is connected to the corners of the movable groove (404) by sliding and inserting, and the top of the sealing plate (432) is connected to the inner cavity of the second cavity (402) by sliding and inserting. The sealing plate (432) is used to seal the inner cavity of the second cavity (402).

8. The two-color automobile decorative part forming mold according to claim 6, characterized in that: The bracket (406) is fixed to the middle of the plurality of sealing plates (432), and the second cavity (402) is communicated with the inner cavity of the connecting hole (302).

9. The method for using a two-color automobile decorative part forming mold according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: Step 1: Press the movable mold (200) onto the top of the fixed mold (100), and press the pressing and pulling rod (844) downward so that the clamping plate (803) can be engaged with the outer wall of the positioning column (801), so that the second mold cavity (500) can be pressed onto the top of the mold core assembly (300) to form a first casting cavity; Step 2: driving the electric telescopic rod (405) so that the bracket (406) can be pushed in the inner cavity of the movable groove (404), and the sealing plate (432) slides in the inner cavity of the limiting tube (431), so that the multiple sealing plates (432) can seal the inner cavity of the second cavity (402), so that the connecting hole (302) and the inner cavity of the second cavity (402) can be blocked; Step 3: Injection molding molten liquid is poured into the inner cavity of the plurality of second injection molding holes (700) so that the molten liquid can enter the inner cavity of the second mold cavity (500) for injection molding of the ornament, and the molten liquid enters the inner cavity of the connecting hole (302). The molten liquid in the inner cavity of the first casting cavity can be cooled and molded through the cooling system on the fixed mold (100) and the movable mold (200). The electric telescopic rod (405) is driven in the reverse direction to slide down the sealing plate (432). Then, another color of molten liquid is injected into the inner cavity of the first injection molding hole (600) so that the molten liquid can enter the inner cavity of the first cavity (401). The molten liquid passes through the inner cavity of the second cavity (402) and is connected to the casting body molded in the inner cavity of the connecting hole (302). The cooling system on the fixed mold (100) and the movable mold (200) is again passed so that the two-color decorative part can be injection molded.

10. A two-color automobile decorative part, characterized in that: The two-color automobile decorative part includes a product injection molded by using the method for using the two-color automobile decorative part molding mold according to claim 9.

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