Leakage-proof insert of plastic oil pot

Abstract

The utility model discloses an anti-leakage insert of a plastic oil can, which comprises a hollow cylinder, and annular grooves along the circumference of an outer cylindrical surface are respectively arranged at the upper part and the lower part of the outer cylindrical surface of the hollow cylinder; an anti-skid layer for increasing the friction force between the plastic and the metal is arranged on the outer cylindrical wall surface between the two annular grooves; a hollow boss is arranged on the top face of the hollow column body, and a gap is reserved between the outer edge of the hollow boss and the outer edge of the top face of the hollow column body. According to the insert, the boss is arranged on the top face of the hollow cylinder, the distance is reserved between the boss and the outer edge of the hollow cylinder, the insert is added into an oil can mold before injection molding, a coating layer can be formed between the inner wall of the oil can subjected to injection molding through an injection molding machine and the insert, and the space below the plane of the boss is wrapped. According to the oil pot, the joint of the pot wall and the insert is effectively prevented from being extruded to generate a gap, so that the oil pot and the insert are well coated after being molded and demolded, and the sealing performance and the capability of dealing with thermal expansion and cold contraction and plastic aging are improved.

Description

Technical Field

[0001] This utility model relates to a component for use in an oil can, and more particularly to a leak-proof insert for a plastic oil can. Background Technology

[0002] Oil cans are now common in the automotive market. To save energy and reduce costs, lightweight oil cans have become a development trend in the automotive industry, leading to the widespread use of plastic oil cans with metal inserts. Sealing the metal insert between the plastic and the injection molded part is a crucial process in injection molding. A high-quality insert ensures the performance and quality of the injection molded part, while also preventing losses due to air or liquid leakage. Since plastic and metal are two different materials with significant differences in their coefficients of thermal expansion / contraction, and injection molded products begin to experience varying degrees of thermal expansion and contraction after demolding, plastic is more prone to aging and creep. Therefore, gaps can easily form between the metal insert and the plastic.

[0003] Currently, sealing methods between metal through-hole inserts and plastics include rubber seals, threaded seals, and adhesive seals. Among these, threaded seals are not suitable for injection molded parts with high sealing requirements, while rubber seals and adhesive seals both require the addition of other media, increasing uncertainty and lacking convenience. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a leak-proof insert for a plastic oil can that can improve the sealing performance of the oil can.

[0005] Technical solution: The leak-proof insert for the plastic oil can of this utility model includes a hollow cylinder. The upper and lower cylindrical surfaces of the hollow cylinder are respectively provided with an upper annular groove and a lower annular groove along the circumference of the outer cylindrical surface. The outer cylindrical wall surface between the upper and lower annular grooves is provided with an anti-slip layer to increase the friction between the plastic and the metal. The top surface of the hollow cylinder is provided with a hollow boss, and a gap is left between the outer edge of the hollow boss and the outer edge of the top surface of the hollow cylinder.

[0006] The hollow boss coincides with the center of the hollow column.

[0007] The height of the hollow boss is 1 to 10 mm, depending on the size and specifications of the insert.

[0008] The hollow cylinder has threads on its inner wall.

[0009] The hollow boss extends from the inner edge of the hollow cylinder to the outer edge of the hollow cylinder.

[0010] The outer diameter of the hollow boss is larger than the inner diameter of the hollow cylinder, but smaller than 90% of the outer diameter of the hollow cylinder.

[0011] Among them, the hollow boss is a hollow circular annular boss.

[0012] The anti-slip layer is a mesh surface disposed on the outer cylindrical wall surface between the annular grooves.

[0013] The hollow column is made of metal.

[0014] Beneficial effects: Compared with the prior art, this utility model achieves the following significant effects:

[0015] (1) The insert of this utility model has a boss on the top surface of the hollow column, and there is a gap between the boss and the outer edge of the hollow column. Before injection molding, the insert is added to the oil can mold. The inner wall of the oil can and the insert will form a covering layer after injection molding, which covers the space below the plane of the boss. This will effectively prevent the gap from being generated at the joint between the oil can wall and the insert due to compression, so that the oil can and the insert have good covering properties after molding and demolding, and improve the sealing performance; (2) It makes the oil can better cope with thermal expansion and contraction and plastic aging; (3) It does not require the addition of a medium to improve the sealing performance, which simplifies the operation, facilitates production, and improves convenience. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is a front view of the present invention;

[0019] Figure 4 This is a rear view of the present invention;

[0020] Figure 5 This is a schematic diagram of the assembly structure of this utility model;

[0021] Figure 6 This is a simulation diagram of the deformation of the plastic at the spout of the oil can when the inner wall of the present invention is compressed and expands. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0023] like Figure 1-4As shown, this utility model provides a leak-proof insert for a plastic oil can, including a hollow cylinder 1. The upper part of the outer cylindrical surface of the hollow cylinder 1 has an upper annular groove 21 along the circumference of the outer cylindrical surface, and the lower part has a lower annular groove 22 along the circumference of the outer cylindrical surface. The outer cylindrical wall between the upper annular groove 21 and the lower annular groove 22 is provided with an anti-slip layer 3 to increase the friction between the plastic and the metal. In this embodiment, the outer cylindrical wall is formed by cutting and processing into a regular mesh surface. The top surface of the hollow cylinder is provided with a hollow boss 4, and there is a gap between the outer edge of the hollow boss 4 and the outer edge of the top surface of the hollow cylinder 1.

[0024] The hollow column 1 in this embodiment is made of metal; the inner wall of the hollow column 1 is threaded, that is, the hollow column 1 is provided with an internal threaded hole; the hollow boss 4 extends from the edge of the internal threaded hole of the hollow column 1 to the outer edge of the hollow column 1; the outer diameter of the hollow boss 4 is greater than the diameter of the internal threaded hole of the hollow column 1 and less than 90% of the outer diameter of the hollow column 1.

[0025] In this embodiment, the hollow boss 4 is a hollow annular boss; the center of the hollow boss 4 coincides with that of the hollow column 1, that is, they are coaxially arranged; the height of the hollow boss 4 is 1.5mm; the outer edge diameter of the hollow boss 4 is 32mm, and the outer edge diameter of the top surface of the hollow column 1 is 41mm.

[0026] Figure 5 This is a schematic diagram of the assembly structure of the insert of this utility model in an oil container. The insert is added to the oil container mold before injection molding, and then injection molded by an injection molding machine.

[0027] Figure 6 This is a simulation diagram of the deformation of the plastic at the spout of the oil can when the inner wall of the present invention expands under pressure. Figure 6 The arrow in the right image represents the outward pressure inside the oil container. From Figure 6 As can be seen, when oil is poured into the oil can, the inside of the can is compressed, and the inner wall of the plastic material expands. Using the insert of this invention, the coating layer formed by the inner wall of the oil can and the insert prevents gaps from forming at the joint between the can wall and the insert due to compression. If an insert from the prior art is used, gaps are easily squeezed out at the joint between the can wall and the insert.

[0028] The oil reservoir is subject to periodic heating and cooling under actual working conditions. It heats up during machine operation and cools down when the machine stops. The shrinkage rates of plastics and metals differ significantly (e.g., aluminum is 0.8-1.0%, and nylon 6 is 1.5%-2.5%), which exacerbates the widening of gaps and worsens the reservoir's sealing performance. The insert of this invention effectively improves the oil reservoir's sealing performance.

Claims

1. A leak-proof insert for a plastic oil bottle, characterized in that, The hollow column (1) includes an upper annular groove (21) and a lower annular groove (22) that are respectively formed on the upper and lower sides of the outer cylindrical surface of the hollow column (1). The outer cylindrical wall between the upper annular groove (21) and the lower annular groove (22) is provided with an anti-slip layer (3) to increase the friction between the plastic and the metal. The top surface of the hollow column (1) is provided with a hollow boss (4), and there is a gap between the outer edge of the hollow boss (4) and the outer edge of the top surface of the hollow column (1).

2. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The hollow boss (4) is coaxially arranged with the hollow column (1).

3. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The height of the hollow boss (4) is 1 to 10 mm.

4. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The hollow boss (4) extends from the inner edge of the hollow column to the outer edge of the hollow column.

5. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The outer diameter of the hollow boss (4) is greater than the inner diameter of the hollow column (1) and less than 90% of the outer diameter of the hollow column (1).

6. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The hollow boss (4) is a hollow circular annular boss.

7. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The hollow cylinder (1) has threads on its inner wall.

8. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The anti-slip layer (3) is a mesh surface provided on the outer cylindrical wall surface between the annular grooves.

9. The leak-proof insert for a plastic oil can according to claim 1, characterized in that, The hollow column (1) is made of metal.

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