Injection mold for automobile bottom plaque

Abstract

The utility model provides an injection mold for an automobile bottom plaque, which relates to the technical field of automobile part production and comprises a bottom plate, a water tank and a condenser are fixed at the top of the bottom plate, an operation table is arranged above the bottom plate, and an injection mechanism and a fixed mold are respectively fixed at the top of the operation table. And a hot water pipe and a cooling water pipe are respectively fixed in the fixed mold. Water in the water tank can be heated through the electric heating rod, the condenser can cool the conveyed water, and before injection molding, when the movable mold starts to approach the fixed mold, the electric heating rod is started to heat the water in the water tank, and the conveying mechanism pumps hot water into the hot water pipe; and the fixed mold can be heated by circularly flowing through the hot water pipe, so that during injection molding, liquid plastic flows in the hot model groove to form lines solidified at low temperature, the qualification rate of injection molding of the bottom plaque is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts production, in particular to an automobile bottom decorative plate injection mold. Background Art

[0002] The production and processing of automobile bottom trim panels utilizes injection molding technology and injection molds. Injection molding is a method in which completely molten plastic materials are injected into the mold cavity at a certain temperature with high pressure, and then cooled and solidified to obtain a molded product. The advantages of using injection molds are fast production speed and high efficiency. The operation can be automated. The shape can be from simple to complex, the size can be from large to small, and the product size is accurate. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products and other molding and processing fields, and is suitable for the production and processing of different styles of automobile trim panels.

[0003] During injection molding, when high-temperature liquid plastic enters the mold, the temperature of the mold is relatively low due to the cooling needs of the previous production injection molding machine. The liquid plastic contacts the low-temperature mold in the flow channel and will form lines after cooling, which affects the surface appearance of the bottom trim panel, produces defective products, and has low production efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that liquid plastic contacts with a low-temperature mold in a flow channel and forms lines after cooling, which affects the surface appearance of the bottom decorative plate and easily produces defective products.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an injection mold for an automobile bottom trim panel, comprising a bottom plate, a water tank and a condenser are fixed on the top of the bottom plate, an operating table is arranged above the bottom plate, an injection mechanism and a fixed mold are fixed on the top of the operating table, a hot water pipe and a cooling water pipe are fixed inside the fixed mold, and a conveying mechanism for conveying hot water and cold water to the hot water pipe and the cooling water pipe respectively is arranged on the operating table.

[0006] Preferably, a mold groove is formed on one surface of the fixed mold, and four guide rods are symmetrically fixed thereto, and the movable molds are slidably connected to the four guide rods.

[0007] Preferably, an injection hole is provided on one surface of the model groove and is connected to a surface of the fixed mold close to the injection mechanism, and the injection port of the injection mechanism is aligned with the injection hole.

[0008] Preferably, the conveying mechanism includes a water pump fixed on the top of the water tank, the water inlet ends of the hot water pipe and the cooling water pipe both pass through one side wall of the fixed mold and are respectively installed with a hot connecting pipe and a cold connecting pipe, and the water outlet ends of the hot water pipe and the cooling water pipe both pass through the other side wall of the fixed mold and are installed with a drain pipe.

[0009] Preferably, a reversing valve is also fixed on the top of the water tank, the water inlet end of the water pump and the water outlet end of the water tank are connected by a pumping pipe, the water outlet end of the water pump and the water inlet end of the reversing valve are installed and connected by a connecting pipe, and one of the output ends of the reversing valve is connected to the water inlet end of the condenser by a water inlet pipe.

[0010] Preferably, the bottom end of the heat connecting pipe passes through the bottom of the operating table and is connected to the other output end of the reversing valve, and the bottom end of the cold connecting pipe passes through the bottom of the operating table and is connected to the output end of the condenser.

[0011] Preferably, legs are symmetrically fixed between the bottom of the operating table and the top of the base plate, and electric heating rods are equidistantly fixed inside the water tank.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the water in the water tank can be heated by the electric heating rod, and the condenser can cool the water delivered. Before injection molding, when the movable mold begins to move closer to the fixed mold, the electric heating rod is started to heat the water in the water tank and the delivery mechanism pumps the hot water into the hot water pipe. The fixed mold can be heated by circulating through the hot water pipe. In this way, during injection molding, the liquid plastic flows in the hot model tank, and the texture can be solidified at low temperature, thereby improving the qualified rate of the bottom decorative plate injection molding and improving production efficiency.

[0014] 2. In the utility model, after the temperature of the fixed mold is raised to a certain value, the electric heating rod stops working. After the injection molding is completed, the conveying mechanism pumps the water in the water tank into the condenser for cooling. The low-temperature water is conveyed to the cooling water pipe to cool the fixed mold and the liquid plastic, so that the decorative plate can be solidified smoothly. The cooling water is converted into hot water after heat exchange with the hotter fixed mold and liquid plastic, and the hot water used to heat the fixed mold is gathered in the water tank again, so that it can be reasonably recycled and used to reduce waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a first-angle stereoscopic view of the overall structure of an automobile bottom trim injection mold proposed by the utility model;

[0016] Figure 2 This is a three-dimensional diagram of the cutaway structure of a fixed mold portion in an injection mold for an automobile bottom trim panel proposed by the utility model;

[0017] Figure 3 This is a second-angle stereoscopic view of the overall structure of an automobile bottom trim injection mold proposed by the utility model;

[0018] Figure 4This is a third-angle stereoscopic view of the overall structure of an automobile bottom trim injection mold proposed by the utility model.

[0019] Legend: 1. Base plate; 2. Water tank; 3. Condenser; 4. Operating table; 5. Injection mechanism; 6. Fixed mold; 7. Hot water pipe; 8. Cooling water pipe; 9. Conveying mechanism; 901. Water pump; 902. Hot connecting pipe; 903. Cold connecting pipe; 904. Drain pipe; 905. Reversing valve; 906. Suction pipe; 907. Connecting pipe; 908. Water inlet pipe; 10. Model groove; 11. Guide rod; 12. Injection hole; 13. Electric heating rod. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Embodiment 1, as Figure 1-Figure 4 As shown, the utility model provides an injection mold for an automobile bottom trim panel, comprising a bottom plate 1, a water tank 2 and a condenser 3 are fixed on the top of the bottom plate 1, an operating table 4 is arranged above the bottom plate 1, an injection mechanism 5 and a fixed mold 6 are respectively fixed on the top of the operating table 4, a hot water pipe 7 and a cooling water pipe 8 are respectively fixed inside the fixed mold 6, and a conveying mechanism 9 for conveying hot water and cold water to the hot water pipe 7 and the cooling water pipe 8 respectively is arranged on the operating table 4.

[0023] The effect achieved by the entire embodiment 1 is that the conveying mechanism 9 can convey the hot water in the water tank 2 to the hot water pipe 7 to heat the fixed mold 6, so that the high-temperature liquid plastic flows in the warm overall mold, which can reduce the generation of lines. When the liquid plastic needs to be cooled and formed, the water in the water tank 2 stops heating, and the conveying mechanism 9 can convey the water in the water tank 2 to the condenser 3 for cooling, and then convey the low-temperature water to the cooling water pipe 8 to cool and solidify the fixed mold 6 and the liquid plastic.

[0024] Embodiment 2, as Figure 1-Figure 4As shown, a mold groove 10 is provided on one surface of the fixed mold 6, and four guide rods 11 are symmetrically fixed, and a movable mold is slidably connected to the four guide rods 11; an injection hole 12 is provided on one surface of the mold groove 10 and is connected to a surface of the fixed mold 6 close to the injection molding mechanism 5, and the injection port of the injection molding mechanism 5 is aligned with the injection hole 12; the conveying mechanism 9 includes a water pump 901 fixed on the top of the water tank 2, the water inlet ends of the hot water pipe 7 and the cooling water pipe 8 pass through one side wall of the fixed mold 6 and are respectively connected with a hot connecting pipe 902 and a cold connecting pipe 903, and the water outlet ends of the hot water pipe 7 and the cooling water pipe 8 pass through the other side wall of the fixed mold 6 and are connected with a drain pipe 904; A reversing valve 905 is also fixed on the top of the box 2, the water inlet end of the water pump 901 is connected to the water outlet end of the water tank 2 via a pumping pipe 906, the water outlet end of the water pump 901 and the water inlet end of the reversing valve 905 are installed and connected via a connecting pipe 907, one of the output ends of the reversing valve 905 is connected to the water inlet end of the condenser 3 via a water inlet pipe 908; the bottom end of the hot connecting pipe 902 passes through the bottom of the operating table 4 and is connected to the other output end of the reversing valve 905, and the bottom end of the cold connecting pipe 903 passes through the bottom of the operating table 4 and is connected to the output end of the condenser 3; legs are symmetrically fixed between the bottom of the operating table 4 and the top of the base plate 1, and electric heating rods 13 are equidistantly fixed inside the water tank 2.

[0025] The effect achieved by the entire embodiment 2 is that the movable mold is compatible with the fixed mold 6, and the structure of the movable mold is an existing well-known technology, so it is not shown in the figure, and the movable mold is also provided with a conveying mechanism 9, a water tank 2, an electric heating rod 13 and a condenser 3 for heating and cooling it together. Under the action of the reversing valve 905, the connecting pipe 907 can be connected with the heat connecting pipe 902 according to the needs of use, or the connecting pipe 907 can be connected with the water inlet pipe 908 of the condenser 3, so that water of corresponding temperature can be respectively conveyed to the hot water pipe 7 and the cooling water pipe 8 for heating or cooling.

[0026] Working principle: When in use, when it is necessary to heat the fixed mold 6, start the electric heating rod 13 and the water pump 901, the electric heating rod 13 can heat the water in the water tank 2, the water pump 901 draws hot water from the pumping pipe 906, and it is transported to the heat connecting pipe 902 and the hot water pipe 7 through the reversing valve 905. When the liquid plastic needs to be cooled and formed, the electric heating rod 13 stops working, the condenser 3 starts working, the reversing valve 905 is started, the connecting pipe 907 and the water inlet pipe 908 are connected, and the water pump 901 can pump the hot water in the water tank 2 to the condenser 3, and the condenser 3 is cooled. The warm low-temperature water is transported to the cold connecting pipe 903 and the cooling water pipe 8. The water passing through the hot water pipe 7 and the cooling water pipe 8 flows back to the water tank 2 through the drain pipe 904. The wiring diagram of the condenser 3, water pump 901, reversing valve 905 and electric heating rod 13 in the utility model belongs to the common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use. Therefore, the control method and wiring layout of the condenser 3, water pump 901, reversing valve 905 and electric heating rod 13 are no longer explained in detail. In summary, the problems raised in the above background are solved.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An injection mold for an automobile bottom trim panel, characterized in that: The invention comprises a bottom plate (1), a water tank (2) and a condenser (3) are fixed on the top of the bottom plate (1), an operating table (4) is arranged above the bottom plate (1), an injection molding mechanism (5) and a fixed mold (6) are respectively fixed on the top of the operating table (4), a hot water pipe (7) and a cooling water pipe (8) are respectively fixed inside the fixed mold (6), and a conveying mechanism (9) for conveying hot water and cold water to the hot water pipe (7) and the cooling water pipe (8) is arranged on the operating table (4).

2. The automobile bottom trim injection mold according to claim 1, characterized in that: A mold groove (10) is formed on one surface of the fixed mold (6) and four guide rods (11) are symmetrically fixed thereto. The four guide rods (11) are slidably connected to the movable molds.

3. The automobile bottom trim injection mold according to claim 2, characterized in that: An injection hole (12) is provided on one surface of the mold groove (10) and is connected to a surface of the fixed mold (6) close to the injection mechanism (5), and the injection port of the injection mechanism (5) is aligned with the injection hole (12).

4. The automobile bottom trim injection mold according to claim 1, characterized in that: The conveying mechanism (9) comprises a water pump (901) fixed on the top of the water tank (2); the water inlet ends of the hot water pipe (7) and the cooling water pipe (8) pass through a side wall of the fixed mold (6) and are respectively connected to a hot connecting pipe (902) and a cold connecting pipe (903); the water outlet ends of the hot water pipe (7) and the cooling water pipe (8) pass through the other side wall of the fixed mold (6) and are respectively connected to a drainage pipe (904).

5. The automobile bottom trim injection mold according to claim 4, characterized in that: A reversing valve (905) is also fixed on the top of the water tank (2); the water inlet end of the water pump (901) and the water outlet end of the water tank (2) are connected via a pumping pipe (906); the water outlet end of the water pump (901) and the water inlet end of the reversing valve (905) are connected via a connecting pipe (907); one of the output ends of the reversing valve (905) and the water inlet end of the condenser (3) are connected via a water inlet pipe (908).

6. The automobile bottom trim injection mold according to claim 5, characterized in that: The bottom end of the hot connecting pipe (902) passes through the bottom of the operating table (4) and is connected to the other output end of the reversing valve (905), and the bottom end of the cold connecting pipe (903) passes through the bottom of the operating table (4) and is connected to the output end of the condenser (3).

7. The automobile bottom trim injection mold according to claim 1, characterized in that: Support legs are symmetrically fixed between the bottom of the operating table (4) and the top of the base plate (1), and electric heating rods (13) are equidistantly fixed inside the water tank (2).

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