An injection-molded structure for an oil filter

Abstract

This utility model discloses an injection molding structure for an oil filter, relating to the field of oil filter injection molding. It includes a lower mold and an upper mold connected to the top of the lower mold. Both the lower and upper molds have injection cavities at their proximal ends. Each injection cavity has mounting grooves on both sides of its inner wall. A central shaft is inserted between the two mounting grooves. Cooling pipes protruding from the side wall of the lower mold are symmetrically fixed to the side wall of the central shaft. One end of each central shaft is rotatably connected to a demolding rod fixed to the lower mold. A base is integrally formed at the bottom of the lower mold. This utility model allows the oil filter housing and central shaft to separate from the lower mold by unscrewing the demolding rod from the screw hole. After separation, the oil filter housing slides out from the end of the central shaft without the demolding rod, thus separating the oil filter housing from the lower mold and improving the ease of demolding the oil filter housing.

Description

Technical Field

[0001] This utility model relates to the field of oil filter injection molding, specifically to an injection molding structure for oil filters. Background Technology

[0002] The injection-molded structure of an oil filter mainly involves the design and manufacturing process of its plastic components, such as the outer shell, end caps, and internal support frame. The plastic parts of the oil filter are typically made of engineering plastics through injection molding to meet requirements for oil resistance, high temperature resistance, pressure resistance, and sealing. The filter shell is usually cylindrical, housing the filter element internally and connecting to the oil passage externally.

[0003] Currently, because the oil filter shell has a cylindrical structure, its injection molding structure requires the embedding of a spindle in the injection mold. However, since the spindle and the injection mold are separate structures, it is difficult to separate the oil filter from the injection mold and the spindle. Furthermore, the injection mold relies solely on natural heat dissipation for cooling, resulting in low injection molding efficiency. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an injection molding structure for an oil filter, so as to solve the technical problem that the oil filter is difficult to separate from the injection mold and the shaft rod because the shaft rod and the injection mold are separate structures, and the injection mold relies solely on natural heat dissipation for cooling, resulting in low injection molding efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection molding structure for an oil filter, comprising a lower mold and an upper mold connected to the top of the lower mold. An injection cavity is provided at one end of the lower mold and the upper mold, and mounting grooves are provided on both sides of the inner wall of the injection cavity. A spindle is inserted between the two mounting grooves. Cooling pipes protruding from the side wall of the lower mold are symmetrically fixed to the side wall of the spindle, and a demolding rod fixed to the lower mold is rotatably inserted at one end of the spindle.

[0006] The present invention is further configured such that the bottom end of the lower mold is integrally formed with a base, and the top end of the lower mold is welded and fixed with positioning rods in a rectangular array.

[0007] The present invention is further configured such that an injection tube communicating with the injection cavity is fixedly installed at the top of the upper mold, and multiple through holes are provided on the upper mold.

[0008] The present invention is further configured such that the positioning rod is fitted into the through hole, and the top end of the positioning rod is threadedly fitted with a nut through the through hole.

[0009] The present invention is further configured such that the side walls of the upper mold and the lower mold are provided with grooves, the cooling pipe is inserted into the grooves, and the cooling pipe is provided with a pipe mounting part.

[0010] The present invention is further configured such that a screw hole is provided on the inner wall of the mounting groove of the lower mold, and the bottom end of the demolding rod is threaded into the screw hole.

[0011] The present invention is further configured such that a protrusion is provided at the center of the demolding rod, and the top end of the demolding rod is inserted into the upper mold; and a cooling cavity with an annular structure and connected to the cooling pipe is provided in the shaft rod.

[0012] In summary, this utility model has the following advantages: By embedding a spindle between the mounting grooves of the lower and upper molds, and threading a demolding rod on the spindle into a screw hole to fix it to the lower mold, demolding first separates the upper and lower molds. Then, by unscrewing the demolding rod from the screw hole, the oil filter housing and spindle are separated from the lower mold. After separation, the oil filter housing slides out from the end of the spindle without the demolding rod, thus separating the oil filter housing from the lower mold, improving the ease of demolding. Furthermore, by providing a cooling chamber in the spindle, residual water in the cooling chamber is poured out during injection molding, preventing it from affecting the injection molding process. After injection molding, the pipe installation part on one of the cooling pipes is connected to a water pipe, allowing water to flow in the cooling chamber and then drain from the other cooling pipe, improving the cooling efficiency of the oil filter housing after injection molding. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the lower mold of this utility model;

[0016] Figure 4 This is a cross-sectional structural diagram of the shaft of this utility model.

[0017] In the diagram: 1. Lower mold; 2. Positioning rod; 3. Injection tube; 4. Upper mold; 5. Cooling tube; 6. Bolt; 7. Through hole; 8. Groove; 9. Injection cavity; 10. Mounting groove; 11. Screw hole; 12. Base; 13. Demolding rod; 14. Protrusion; 15. Cooling cavity; 16. Pipe installation part; 17. Shaft rod. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] An injection-molded structure for an oil filter, such as Figure 1-4 As shown, it includes a lower mold 1 and an upper mold 4 connected to the top of the lower mold 1. The lower mold 1 and the upper mold 4 are both provided with injection cavities 9 at their respective ends. The inner walls of the injection cavities 9 are provided with mounting grooves 10 on both sides. A spindle 17 is inserted between the two mounting grooves 10. Cooling pipes 5 protruding from the side wall of the lower mold 1 are symmetrically fixed to the side wall of the spindle 17. One end of the spindle 17 is rotatably inserted with a demolding rod 13 fixed to the lower mold 1. The injection molding material of the oil filter housing includes PA6 (nylon 6), PA66, PP (polypropylene), and PPS (polyphenylene sulfide).

[0020] The bottom of the lower mold 1 is integrally formed with a base 12, and the top of the lower mold 1 is fixedly welded with positioning rods 2 in a rectangular array. The top of the upper mold 4 is fixedly installed with an injection tube 3 that communicates with the injection cavity 9, and the upper mold 4 has multiple through holes 7. The top of the injection tube 3 is connected to the injection equipment. The installation method of the injection tube 3 is existing technology and will not be described in detail here. The positioning rods 2 are inserted into the through holes 7, and the top of the positioning rods 2 passes through the through holes 7 and is threaded with a nut.

[0021] Both the upper mold 4 and the lower mold 1 have grooves 8 on their side walls. The cooling pipe 5 is inserted into the groove 8 and has a pipe mounting part 16. The mounting groove 10 of the lower mold 1 has a screw hole 11 on its inner wall. The bottom end of the demolding rod 13 is threaded into the screw hole 11. The center of the demolding rod 13 has a protrusion 14. When demolding, the upper mold 4 is first separated from the lower mold 1, and the demolding rod 13 is unscrewed from the screw hole 11 to separate the oil filter housing and the shaft rod 17 from the lower mold 1. After separation, the oil filter housing slides out from the end of the shaft rod 17 that does not have the demolding rod 13, and then the oil filter housing is separated from the lower mold 1, which improves the convenience of demolding the oil filter housing.

[0022] The top end of the release rod 13 is inserted into the upper mold 4. The shaft rod 17 has a cooling cavity 15 with an annular structure that is connected to the cooling pipe 5. After injection molding, the pipe mounting part 16 on one of the cooling pipes 5 is connected to the tap water pipe, so that the tap water flows in the cooling cavity 15 and is discharged from the other cooling pipe 5, thereby improving the cooling efficiency of the oil filter shell after injection molding.

[0023] The working principle of this utility model is as follows: During use, the residual water in the cooling chamber 15 is poured out to prevent it from affecting the injection molding process. The demolding rod 13 on the spindle rod 17 is threaded into the screw hole 11 and fixed between it and the lower mold 1. After the upper mold 4 and the lower mold 1 are connected, the nut on the positioning rod 2 is tightened to fix the upper mold 4 and the lower mold 1. After preheating the upper mold 4 and the lower mold 1, the injection molding material is transported along the injection tube 3 to the injection cavity 9. After injection molding, one of the... The pipe mounting part 16 on the cooling pipe 5 is connected to the tap water pipe, so that the tap water flows in the cooling chamber 15 and is discharged from the other cooling pipe 5. When demolding, the upper mold 4 is first separated from the lower mold 1, and the demolding rod 13 is unscrewed from the screw hole 11 to separate the oil filter shell and the shaft rod 17 from the lower mold 1. After separation, the oil filter shell slides out from the end of the shaft rod 17 that does not have the demolding rod 13, and drives the oil filter shell to separate from the lower mold 1, which improves the convenience of demolding the oil filter shell.

[0024] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An injection molded structure for oil filter comprising a lower mold (1) and an upper mold (4) connected to the top end of the lower mold (1), characterized in that: The lower mold (1) and the upper mold (4) are both provided with injection cavities (9) at their respective ends. The inner walls of the injection cavities (9) are provided with mounting grooves (10) on both sides. A spindle (17) is inserted between the two mounting grooves (10). Cooling pipes (5) protruding from the side wall of the lower mold (1) are symmetrically fixed on the side wall of the spindle (17). One end of the spindle (17) is rotatably inserted with a demolding rod (13) fixed to the lower mold (1).

2. An injection molded structure for an oil filter as defined in claim 1, wherein: The bottom end of the lower mold (1) is integrally formed with a base (12), and the top end of the lower mold (1) is welded with positioning rods (2) in a rectangular array.

3. An injection molded structure for an oil filter as defined in claim 2, wherein: The top of the upper mold (4) is fixedly installed with an injection tube (3) that communicates with the injection cavity (9), and the upper mold (4) is provided with multiple through holes (7).

4. An injection molded structure for an oil filter as defined in claim 3, wherein: The positioning rod (2) is inserted into the through hole (7), and the top end of the positioning rod (2) is threaded through the through hole (7) and fitted with a nut.

5. A molded structure for an oil filter as defined in claim 1 wherein: The upper mold (4) and the lower mold (1) are both provided with grooves (8) on their side walls. The cooling pipe (5) is inserted into the groove (8) and a pipe mounting part (16) is provided on the cooling pipe (5).

6. An injection molded structure for an oil filter as defined in claim 1, wherein: The mounting groove (10) of the lower mold (1) has a screw hole (11) on its inner wall, and the bottom end of the demolding rod (13) is threaded into the screw hole (11).

7. An injection molded structure for an oil filter as defined in claim 6, wherein: The demolding rod (13) has a protrusion (14) at its center and the top of the demolding rod (13) is inserted into the upper mold (4). The shaft rod (17) has a cooling cavity (15) with an annular structure that is connected to the cooling pipe (5).

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