Injection mold with self-lubricating mechanism for easy demoulding

Abstract

The present invention relates to the technical field of injection molding processing, and discloses an injection mold with a self-lubricating mechanism for easy demoulding, including: an operating table, a feed opening is provided on the operating table; a supporting mechanism, including a first supporting plate and a second supporting plate, the first supporting plate and the second supporting plate are both fixedly mounted on the operating table, and are respectively located on both sides of the feed opening, and a movable plate is provided between the first supporting plate and the second supporting plate; a molding assembly, including a fixed mold and a movable mold, the fixed mold is fixedly mounted on the second supporting plate, and an injection hole is provided in the center of the fixed mold, and a plurality of guide holes are provided on the movable mold; a demoulding assembly, the demoulding assembly including a header. By setting the self-lubricating mechanism, automatic lubrication of the ejector pin can be achieved before and after the injection demoulding work, ensuring that the ejector pin can smoothly eject the molded product under the push of the push plate.

Description

Technical Field

[0001] The invention relates to the field of injection molding processing, in particular to an injection mold with a self-lubricating mechanism for easy demoulding. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. 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.

[0003] The method is to stir the completely molten plastic material through a screw at a certain temperature, inject it into the mold cavity with high pressure, and obtain a molded product after cooling and solidification. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.

[0004] Products after injection molding need to be demolded. Manual demolding as a transmission demolding method is the simplest and most basic demolding method. Operators use hand tools, such as screwdrivers, flat-nosed pliers, etc., to remove plastic parts from the mold. Manual demolding is suitable for plastic parts with larger sizes and simpler structures, but it has high technical requirements for operators and low production efficiency. Therefore, the ejection demolding method has gradually been introduced. Among them, the ejection mechanism is a common automatic demolding method, which is suitable for plastic parts with smaller sizes and simpler structures. The ejection mechanism pushes the plastic part out of the mold through a pneumatic or hydraulic device. Ejection demolding can improve production efficiency, but it has high requirements for the design and manufacturing of the mold structure. In addition, the ejector pin needs to make a long-term reciprocating motion relative to the mold during the ejection of the product. Therefore, the gap between the ejector pin and the structure supporting the ejector pin needs to be lubricated. The existing technology can only inject lubricating oil into the gap between the ejector pin and the structure supporting the ejector pin by injection, spraying, etc. before the injection molding mold leaves the factory or when the injection mold is repaired. This method can temporarily maintain the smoothness of the ejector pin, but as friction generates heat, the lubricating oil is easily deteriorated by heat, and then solid residue is produced. On the one hand, the lubrication effect is affected, and on the other hand, the residue is easy to enter the inner cavity of the mold with the ejector pin, which has an adverse effect on the quality of the injection molded product. Summary of the invention

[0005] The purpose of the present invention is to provide an injection mold with a self-lubricating mechanism for easy demoulding, so as to solve the above technical problems:

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An injection mold with a self-lubricating mechanism for easy demoulding comprises: an operating table, a feeding port is formed on the operating table; a supporting mechanism comprises a first supporting plate and a second supporting plate, the first supporting plate and the second supporting plate are both fixedly mounted on the operating table and are respectively located on both sides of the feeding port, a movable plate is arranged between the first supporting plate and the second supporting plate; a molding assembly comprises a fixed mold and a movable mold, the fixed mold is fixedly mounted on the second supporting plate, an injection hole is formed in the center of the fixed mold, and a plurality of guide holes are formed on the movable mold; a demoulding assembly comprises a junction box, one end of which is fixedly mounted on the end surface of the movable plate; the other end of the junction box is open and fixedly connected to the movable mold, a push plate is slidably provided in the junction box, a plurality of ejector rods are fixedly mounted on the push plate, the ejector rods are inserted into the guide holes and are slidably connected to the guide holes; a self-lubricating mechanism is fixedly arranged on the movable mold for lubricating the ejector rods. Through the above technical solution, the main structural content of the injection mold with a self-lubricating mechanism for easy demoulding is provided, which can achieve the effect of convenient demoulding and self-lubricating the demoulding components during the process of completing the injection molding of the product.

[0008] As a further technical solution, a guide rod is fixedly arranged between the first support plate and the second support plate, the movable plate is slidably connected to the guide rod, a first cylinder is fixedly arranged on the first support plate, and an output end of the first cylinder is fixedly connected to the movable plate. The above technical solution provides a specific structural relationship between the movable plate and the first support plate and the second support plate, and the first cylinder is arranged to provide power for the movable plate to slide on the guide rod.

[0009] As a further technical solution, a second cylinder is fixedly arranged at one end of the header near the movable plate, and the output end of the second cylinder is fixedly connected to the push plate. The above technical solution provides a specific driving method for the push plate to slide in the header. In the specific demoulding process, the output end of the second cylinder pushes the push plate, and the push plate pushes the ejector rod, and the molded product is ejected from the movable mold and falls into other process equipment of the production line from the discharge port.

[0010] As a further technical solution, an oil groove is provided on the inner wall of the guide hole around the ejector pin, and the length of the oil groove is less than the length of the guide hole, and an annular groove is provided on the inner wall of one end of the guide hole close to the fixed mold, and an oil scraper ring is embedded in the annular groove. In the above technical solution, the oil scraper ring is embedded in the annular groove, which can scrape off the lubricating oil on the surface of the ejector pin before the ejector pin is extended to the molding mold, so as to prevent the residual lubricating oil on the surface of the ejector pin from entering the mold cavity of the movable mold and affecting the quality of the injection molded product.

[0011] As a further technical solution, the self-lubricating mechanism comprises:

[0012] An oil push ring, wherein the oil push ring is fixedly sleeved on the push rod, and the outer wall of the oil push ring is slidably connected to the inner wall of the oil groove;

[0013] The oil pipe assembly comprises a first pipe and a second pipe, wherein the first pipe is connected to one end of the oil groove away from the fixed mold, and the second pipe is connected to the other end of the oil groove, and the first pipe and the second pipe are communicated with each other.

[0014] As a further technical solution, the self-lubricating mechanism further includes:

[0015] An oil filter assembly, the oil filter assembly includes an oil storage box, the oil storage box is fixedly mounted on the side wall of the movable mold, the open end of the oil storage box is detachably connected to an end cover, the end cover is provided with an oil filling port, the inner cavity of the oil storage box is provided with a double-layer filter tube, the side wall of the double-layer filter tube is provided with filter holes, the first tube is connected to the chamber formed by the inner wall of the oil storage box and the outer wall of the double-layer filter tube, and the second tube is connected to the inner cavity of the double-layer filter tube.

[0016] As a further technical solution, an overflow hole is provided on the end face of the push oil ring, a one-way valve assembly is arranged in the overflow hole, the one-way valve assembly includes a valve stem, the valve stem is movably arranged in the overflow hole, one end of the valve stem close to the first tube is fixedly connected to the left and right valve cores, the other end of the valve stem is fixedly provided with a fixed block, and a spring is fixedly connected between the fixed block and the end face of the push oil ring.

[0017] As a further technical solution, the self-lubricating mechanism further includes:

[0018] An oil pressure monitoring unit, used for collecting oil pressure data of lubricating oil, comprising a hydraulic sensor arranged in the first pipe;

[0019] An analysis and judgment unit, used for importing the oil pressure data into a trained calculation and judgment model, and outputting a judgment result on the state of the lubricating oil;

[0020] The information prompting unit is used to generate prompting information according to the judgment result of the lubricating oil state.

[0021] Beneficial effects of the present invention:

[0022] (1) In the present invention, the movable plate slides between the first support plate and the second support plate, and drives the movable mold to move, so as to achieve the fitting of the movable mold and the fixed mold during injection molding and the separation during demolding. During the demolding process, the push plate slides in the direction close to the movable mold in the manifold, so that the ejector pin pushes out the molded product and drops it from the discharge port into other process equipment of the production line. By setting the self-lubricating mechanism, the ejector pin can be automatically lubricated before and after the injection molding and demolding work, ensuring that the ejector pin can smoothly eject the molded product under the push of the push plate.

[0023] (2) In the present invention, an annular groove is formed on the inner wall of one end of the guide hole close to the fixed mold, and an oil scraper ring is embedded in the annular groove, which can scrape off the lubricating oil on the surface of the ejector pin before the ejector pin is extended to the molding mold, thereby preventing the residual lubricating oil on the surface of the ejector pin from entering the mold cavity of the movable mold and affecting the quality of the injection molded product;

[0024] (3) The present invention provides a push-off oil ring. During the demoulding process, the push pin slides in the guide hole, and the push-off oil ring slides in the oil groove together with the push pin. The sliding of the push-off oil ring can push the lubricating oil at both ends of the push-off oil ring to flow, and the flow direction of the lubricating oil is consistent with the movement direction of the push pin, thereby reducing the friction between the lubricating oil and the push pin, making the movement of the push pin smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of a three-dimensional structure of the injection mold with a self-lubricating mechanism for easy demoulding after partial sectioning in the present invention;

[0027] Figure 2 It is a schematic front view of the injection mold with a self-lubricating mechanism for easy demoulding according to the present invention after partial sectioning;

[0028] Figure 3 It is a schematic diagram of the local structure of the injection mold with a self-lubricating mechanism for easy demoulding in the present invention after partial sectioning;

[0029] Figure 4 The accompanying drawings are for the specification of the present invention Figure 3 Schematic diagram of the local structure at A in the middle;

[0030] Figure 5 It is a structural schematic diagram of the oil push ring in the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the oil filter assembly of the present invention after partial sectioning.

[0032] Description of the drawings: 1. operating table; 101. feeding port; 2. supporting mechanism; 21. first supporting plate; 211. guide rod; 212. first cylinder; 22. second supporting plate; 23. movable plate; 3. molding assembly; 4. demoulding assembly; 5. self-lubricating mechanism; 31. fixed mold; 311. injection hole; 32. movable mold; 321. guide hole; 3211. oil groove; 3212. oil scraper ring; 41. header; 42. push plate; 43. ejector rod; 44. second cylinder; 51. oil push ring; 52. first pipe; 53. second pipe; 54. oil filter assembly; 55. hydraulic sensor; 511. valve stem; 512. valve core; 513. fixed block; 541. oil storage box; 542. double-layer filter tube; 543. end cover; 544. oil filling port DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0034] Please refer to the attached Figure 1-3 As shown, the present invention is an injection mold with a self-lubricating mechanism 5 for easy demoulding, comprising: an operating table 1, wherein a feed opening 101 is formed through the operating table 1; a supporting mechanism 2, comprising a first supporting plate 21 and a second supporting plate 22, wherein the first supporting plate 21 and the second supporting plate 22 are both fixedly mounted on the operating table 1 and are respectively located on both sides of the feed opening 101, and a movable plate 23 is arranged between the first supporting plate 21 and the second supporting plate 22; a molding assembly 3, comprising a fixed mold 31 and a movable mold 32, wherein the fixed mold 31 is fixedly mounted on the second supporting plate 22, and the fixed mold 31 is An injection hole 311 is opened in the center, and a plurality of guide holes 321 are opened through the movable mold 32; a demoulding component 4, the demoulding component 4 includes a header 41, one end of which is fixedly mounted on the end surface of the movable plate 23; the other end of the header 41 is open and fixedly connected to the movable mold 32, a push plate 42 is slidably arranged in the header 41, a plurality of ejector rods 43 are fixedly mounted on the push plate 42, the ejector rods 43 are inserted into the guide holes 321 and are slidably connected to the guide holes 321; a self-lubricating mechanism 5 is fixedly arranged on the movable mold 32, and is used to lubricate the ejector rods 43.

[0035] Through the above technical solution, this embodiment provides the main structural content of the injection mold with a self-lubricating mechanism 5 for easy demoulding, which can achieve the effect of convenient demoulding and self-lubricating the demoulding component 4 during the process of completing the injection molding of the product. Specifically, the movable plate 23 slides between the first support plate 21 and the second support plate 22, and drives the movable mold 32 to move, so as to achieve the fitting of the movable mold 32 and the fixed mold 31 during injection molding and the separation during demoulding. During the demoulding process, the push plate 42 slides in the direction close to the movable mold 32 in the header 41, so that the ejector pin 43 pushes out the molded product and falls into other process equipment of the production line from the discharge port. Through the setting of the self-lubricating mechanism 5, the ejector pin 43 can be automatically lubricated before and after the injection molding demoulding work, ensuring that the ejector pin 43 can smoothly eject the molded product under the push of the push plate 42.

[0036] Please refer to the attached Figure 2 As shown, a guide rod 211 is fixedly arranged between the first support plate 21 and the second support plate 22, the movable plate 23 is slidably connected to the guide rod 211, a first cylinder 212 is fixedly arranged on the first support plate 21, and an output end of the first cylinder 212 is fixedly connected to the movable plate 23.

[0037] Through the above technical solution, this embodiment provides a specific structural relationship between the movable plate 23 and the first support plate 21 and the second support plate 22, and the first cylinder 212 is set to provide power for the movable plate 23 to slide on the guide rod 211.

[0038] Please refer to the attached Figure 1-2 As shown, a second cylinder 44 is fixedly provided at one end of the header 41 close to the movable plate 23 , and an output end of the second cylinder 44 is fixedly connected to the push plate 42 .

[0039] Through the above technical scheme, this embodiment provides a specific driving method for making the push plate 42 slide in the header 41. During the specific demolding process, the output end of the second cylinder 44 pushes the push plate 42, and the push plate 42 pushes the push rod 43, and pushes the molded product out of the movable mold 32, and drops it into other process equipment of the production line from the discharge port.

[0040] Please refer to the attached Figure 3-4 As shown, an oil groove 3211 is formed on the inner wall of the guide hole 321 around the ejector rod 43, and the length of the oil groove 3211 is smaller than the length of the guide hole 321. An annular groove is formed on the inner wall of one end of the guide hole 321 close to the fixed mold 31, and an oil scraper ring 3212 is embedded in the annular groove.

[0041] Through the above technical solution, it should be noted that in this embodiment, the oil groove 3211 provided on the inner wall of the guide hole 321 is used to store lubricating oil, and the oil groove 3211 is provided around the ejector pin 43, so that when the ejector pin 43 moves in the guide hole 321, most of the surface area is in contact with the lubricating oil, and only a small part is in direct contact with the inner wall of the guide hole 321, thereby reducing the friction between the ejector pin 43 and the inner wall of the guide hole 321, and achieving a better lubrication effect for the sliding of the ejector pin 43 in the guide hole 321. In addition, an annular groove is provided on the inner wall of one end of the guide hole 321 close to the fixed mold 31, and an oil scraper ring 3212 is embedded in the annular groove, which can scrape off the lubricating oil on the surface of the ejector pin 43 before the ejector pin 43 extends to the molding mold, so as to prevent the residual lubricating oil on the surface of the ejector pin 43 from entering the mold cavity of the movable mold 32 and affecting the quality of the injection molded product.

[0042] Please refer to the attached Figure 3-5 As shown, the self-lubricating mechanism 5 includes:

[0043] An oil push ring 51, wherein the oil push ring 51 is fixedly sleeved on the push rod 43, and the outer wall of the oil push ring 51 is slidably connected to the inner wall of the oil groove 3211;

[0044] The oil pipe assembly includes a first pipe 52 and a second pipe 53. The first pipe 52 is connected to one end of the oil groove 3211 away from the fixed mold 31, and the second pipe 53 is connected to the other end of the oil groove 3211. The first pipe 52 and the second pipe 53 are connected.

[0045] Through the above technical scheme, this embodiment provides the structural content of the self-lubricating mechanism 5, specifically, the push oil ring 51 is fixedly sleeved on the push rod 43, and the outer wall of the push oil ring 51 is slidably connected to the inner wall of the oil groove 3211. During the demolding process, the push rod 43 slides in the guide hole 321, and the push oil ring 51 slides in the oil groove 3211 together with the push rod 43. The sliding of the push oil ring 51 can push the lubricating oil at both ends thereof to flow, and the flow direction of the lubricating oil is consistent with the movement direction of the push rod 43, thereby reducing the friction between the lubricating oil and the push rod 43, so that the sliding of the push rod 43 is smoother. In addition, through the arrangement of the first tube 52 and the second tube 53 at both ends of the oil groove 3211, the first tube 52 and the second tube 53 are connected. Therefore, when the push rod 43 reciprocates in the guide hole 321, the lubricating oil can flow back and forth between the first tube 52 and the second tube 53.

[0046] Please refer to the attached Figure 4-6 As shown, the self-lubricating mechanism 5 also includes:

[0047] The oil filter assembly 54 comprises an oil storage box 541, the oil storage box 541 is fixedly mounted on the side wall of the movable mold 32, the open end of the oil storage box 541 is detachably connected to an end cover 543, the end cover 543 is provided with an oil filling port 544, the inner cavity of the oil storage box 541 is provided with a double-layer filter tube 542, the side wall of the double-layer filter tube 542 is provided with filter holes, the first tube 52 is connected to the chamber formed by the inner wall of the oil storage box 541 and the outer wall of the double-layer filter tube 542, and the second tube 53 is connected to the inner cavity of the double-layer filter tube 542.

[0048] Through the above technical solution, in this embodiment, an oil filter assembly 54 is arranged between the first tube 52 and the second tube 53. During the demoulding process, the push rod 43 slides back and forth in the guide hole 321, and the oil push ring 51 slides back and forth in the oil groove 3211, and pushes the lubricating oil to flow back and forth between the first tube 52 and the second tube 53. During this period, the oil filter assembly 54 filters the lubricating oil once in each demoulding process, reducing the adverse effect of a small amount of solid residue in the lubricating oil on the lubrication effect. In addition, with the arrangement of the oil scraper ring 3212, it is also possible to prevent solid residue from entering the mold cavity of the movable mold 32 and affecting the quality of the injection molded product. It should be noted that the double-layer oil filter tube can be regarded as a filter element in a traditional filter. The double-layer oil filter tube is composed of two tubes, one thick and one thin, both of which are provided with filter holes. An adsorbent substance such as activated carbon is arranged between the two tubes to adsorb solid impurities in the lubricating oil. The inner cavity of the double-layer filter tube 542 is the inner cavity of the thin tube.

[0049] Please refer to the attached Figure 4-5 As shown, an overflow hole is opened on the end face of the push oil ring 51, and a one-way valve assembly is arranged in the overflow hole. The one-way valve assembly includes a valve stem 511, and the valve stem 511 is movably arranged in the overflow hole. One end of the valve stem 511 close to the first tube 52 is fixedly connected to the left and right valve cores 512, and the other end of the valve stem 511 is fixedly provided with a fixing block 513, and a spring is fixedly connected between the fixing block 513 and the end face of the push oil ring 51.

[0050] Through the above technical solution, in this embodiment, the one-way valve assembly is provided to limit the flow direction of the lubricating oil. Specifically, the flow direction of the lubricating oil in the oil groove 3211 is limited to flow from the second tube 53 to the first tube 52 through the above structure. On the one hand, the oil filter assembly 54 can play a better filtering role. On the other hand, it prevents the lubricating oil pressure in one end of the oil groove 3211 close to the second tube 53 from being too high, thereby preventing the lubricating oil from being squeezed into the mold cavity of the movable mold 32.

[0051] The self-lubricating mechanism 5 also includes:

[0052] An oil pressure monitoring unit, used for collecting oil pressure data of lubricating oil, comprising a hydraulic sensor 55 disposed in the first tube 52;

[0053] The analysis and judgment unit is used to import the oil pressure data into the trained calculation and judgment model and output the judgment result of the lubricating oil state. The specific calculation and judgment process is as follows:

[0054] By formula Calculate the judgment coefficient ;

[0055] in, and are the time intervals corresponding to the ejection process and the contraction process of the ejector pin 43 respectively; is the time-varying value of the oil pressure measured by the hydraulic sensor 55; and They are respectively preset standard oil pressure variation curves corresponding to the ejection process and the retraction process of the ejector rod 43; , is the preset weight coefficient;

[0056] The judgment parameters With the preset range Make a comparative judgment:

[0057] like , it is judged that the lubricating oil is insufficient; the information prompt unit generates a prompt signal for oil filling;

[0058] like , it is determined that the lubricating oil pressure is too high, and the information prompt unit generates a prompt signal for replacing the double-layer filter tube 542;

[0059] like , it is judged that the lubrication state of the lubricating oil is normal.

[0060] The information prompting unit is used to generate prompting information according to the judgment result of the lubricating oil state.

[0061] Through the above technical solution, this embodiment can realize the monitoring and management of the lubrication state. First, the real-time data of the oil pressure in the first pipe 52 is collected by the hydraulic sensor 55, and then the oil pressure data is imported into the trained calculation and judgment model. Specifically, the formula Calculate the judgment coefficient Finally, the judgment parameters With the preset range Make a comparative judgment: If , indicating that the oil pressure of the lubricating oil is low, it is judged that the amount of lubricating oil is insufficient; the information prompt unit generates a prompt signal for oil filling; if , it is judged that the lubricating oil pressure is too high, and it is very likely that the double-layer filter tube 542 has filtered too much solid residue, blocking the path of the lubricating oil flow, so the information prompt unit generates a prompt signal to replace the double-layer filter tube 542; if , then it is judged that the lubrication state of the lubricating oil is normal. It should be noted that in the formula, and are preset standard oil pressure change curves corresponding to the ejection process and the contraction process of the ejector rod 43, respectively. , To preset weight coefficients, the above preset data can be obtained by fitting the historical experimental data of the simulation experiment, which will not be described in detail here.

[0062] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An injection mold having a self-lubricating mechanism (5) for easy demoulding, characterized in that: include: An operating table (1), wherein a material discharge port (101) is provided through the operating table (1); A support mechanism (2), comprising a first support plate (21) and a second support plate (22), wherein the first support plate (21) and the second support plate (22) are both fixedly mounted on the operating table (1) and are respectively located on both sides of the material discharge port (101), and a movable plate (23) is provided between the first support plate (21) and the second support plate (22); A molding assembly (3) comprising a fixed mold (31) and a movable mold (32), wherein the fixed mold (31) is fixedly mounted on the second support plate (22), an injection hole (311) is provided at the center of the fixed mold (31), and a plurality of guide holes (321) are provided through the movable mold (32); A demoulding assembly (4), the demoulding assembly (4) comprising a header (41), one end of the header (41) being fixedly mounted on an end surface of the movable plate (23); the other end of the header (41) being open and fixedly connected to the movable mold (32); a push plate (42) being slidably disposed in the header (41), a plurality of push rods (43) being fixedly mounted on the push plate (42), the push rods (43) being inserted into the guide holes (321) and being slidably connected to the guide holes (321); A self-lubricating mechanism (5) fixedly arranged on the movable mold (32) and used for lubricating the ejector rod (43); A guide rod (211) is fixedly arranged between the first support plate (21) and the second support plate (22); the movable plate (23) is slidably connected to the guide rod (211); a first cylinder (212) is fixedly arranged on the first support plate (21); and an output end of the first cylinder (212) is fixedly connected to the movable plate (23); A second cylinder (44) is fixedly disposed at one end of the header (41) close to the movable plate (23), and an output end of the second cylinder (44) is fixedly connected to the push plate (42); An oil groove (3211) is formed on the inner wall of the guide hole (321) around the ejector rod (43), and the length of the oil groove (3211) is smaller than the length of the guide hole (321). An annular groove is formed on the inner wall of one end of the guide hole (321) close to the fixed mold (31), and an oil scraper ring (3212) is embedded in the annular groove. The self-lubricating mechanism (5) comprises: An oil push ring (51), the oil push ring (51) being fixedly sleeved on the push rod (43), and the outer wall of the oil push ring (51) being slidably connected to the inner wall of the oil groove (3211); An oil pipe assembly, comprising a first pipe (52) and a second pipe (53), wherein the first pipe (52) is connected to one end of the oil groove (3211) away from the fixed mold (31), and the second pipe (53) is connected to the other end of the oil groove (3211), and the first pipe (52) and the second pipe (53) are in communication; The self-lubricating mechanism (5) further comprises: An oil filter assembly (54), the oil filter assembly (54) comprising an oil storage box (541), the oil storage box (541) being fixedly mounted on the side wall of the movable mold (32), the open end of the oil storage box (541) being detachably connected to an end cover (543), the end cover (543) being provided with an oil filling port (544), the inner cavity of the oil storage box (541) being provided with a double-layer filter tube (542), the side wall of the double-layer filter tube (542) being provided with filter holes, the first tube (52) being in communication with a chamber formed by the inner wall of the oil storage box (541) and the outer wall of the double-layer filter tube (542), and the second tube (53) being in communication with the inner cavity of the double-layer filter tube (542); An overflow hole is provided on the end surface of the oil push ring (51), a one-way valve assembly is arranged in the overflow hole, and the one-way valve assembly comprises a valve stem (511), the valve stem (511) is movably arranged in the overflow hole, one end of the valve stem (511) close to the first tube (52) is fixedly connected to the left and right valve cores (512), and a fixing block (513) is fixedly arranged on the other end of the valve stem (511), and a spring is fixedly connected between the fixing block (513) and the end surface of the oil push ring (51).

2. The injection mold with a self-lubricating mechanism (5) for easy demoulding according to claim 1, characterized in that: The self-lubricating mechanism (5) further comprises: An oil pressure monitoring unit, used for collecting oil pressure data of lubricating oil, comprising a hydraulic sensor (55) arranged in the first tube (52); An analysis and judgment unit, used for importing the oil pressure data into a trained calculation and judgment model, and outputting a judgment result on the state of the lubricating oil; The information prompting unit is used to generate prompting information according to the judgment result of the lubricating oil state.

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