An in-mold gate cutting device for injection mold

Abstract

The present invention relates to the technical field of injection molds, and specifically to an in-mold gate cutting device for injection molds, which is used to solve the technical problem in the prior art that when the in-mold gate cutting device is in use, the cutting knife inside the in-mold gate cutting device is easily caused to adhere to the cutting knife during the process of moving up to cut off the gate of an injection molded part, thereby reducing the effect of the next gate cutting. The present invention comprises a lower mold and a mold base, a lower mold is provided on the top of the mold base, a gate and a molding cavity are provided on the lower mold, a placement groove is provided on the lower mold, and the placement groove is located below the gate and the molding cavity, a bearing plate is provided on the inner wall of the top of the placement groove, and an opening is provided in the middle of the bearing plate. The present invention is to scrape and clean the material chips adhered to the cutting knife during the process of the cutting knife inside the device moving up to cut off the gate of an injection molded part, so that the cutting knife is not easily adhered to the material chips, which is beneficial to ensuring the effect of the next gate cutting.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an in-mold gate cutting device for an injection mold. Background Art

[0002] Injection molds are tools for producing plastic products, and they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product. The gate mainly refers to the inlet and outlet for the flow of heated liquid plastic during the injection molding process. After molding, the gate will produce excess molding material. In order to ensure the integrity of the product, it is usually necessary to use an in-mold gate cutting device to cut off the gate;

[0003] At present, the in-mold gate cutting device mainly includes a mold base, an upper mold and a lower mold. A molding cavity and a gate are opened on the upper side of the lower mold. A cutting knife is movably arranged in the lower mold. The cutting knife is located between the gate and the molding cavity. The movable direction of the cutting knife is set in the vertical direction. The cutting knife is driven by a driving member installed in the lower mold. After the product is molded in the molding cavity, the driving member drives the cutting knife to cut the gate of the injection molded part upward, so that the gate and the product are thermally separated, and then the product ejector on the lower mold is extended from the molding cavity to eject the product;

[0004] However, when the traditional in-mold gate cutting device is in use, the internal cutting knife is easily caused to adhere to the cutting knife during the process of moving up to cut off the injection molded part gate, thereby reducing the effect of the next gate cutting. At the same time, when the internal cutting knife is cutting the gate, the surface of the cutting knife is in contact with the hot-melt material with too high a temperature, which makes the surface of the cutting knife easily adhere to the hot-melt material, and the hot-melt material easily corrodes the cutting knife, which not only affects the cutting effect of the cutting knife, but also makes the cut surface uneven, affecting the surface finish of the injection molded workpiece and reducing the quality of the injection molded workpiece. Summary of the invention

[0005] The object of the present invention is to provide an in-mold gate cutting device for an injection mold to solve the technical defects proposed by the background technology.

[0006] The objective of the present invention can be achieved through the following technical scheme: an in-mold gate cutting device for an injection mold, comprising a lower mold and a mold base, a lower mold is provided on the top of the mold base, a gate and a molding cavity are provided on the lower mold, a placement groove is provided on the lower mold, and the placement groove is located below the gate and the molding cavity, a bearing plate is provided on the inner wall at the top end of the placement groove, an opening is provided in the middle of the bearing plate, a lifting structure is provided on the inner wall in the middle of the bottom end of the placement groove, a motor protection box is fixedly connected to the top of the lifting structure, a rotating motor is installed in the motor protection box, a cutting knife is provided on the output end of the rotating motor, collecting boxes are symmetrically fixedly installed on the outer walls at both ends of the top of the movable frame, electric push rods are symmetrically provided on the inner wall at the top end of one side of the placement groove, a mounting seat is provided on the output end of the electric push rod, and an adjustment box movably connected to the outer wall of the placement groove is provided between the two mounting seats.

[0007] As a further improvement scheme of the present invention: the lifting structure includes a movable frame vertically fixedly installed on the inner wall of the placement groove, the movable frame is provided with a movable groove, and a movable block extending to the outside of the movable groove is movably connected in the movable groove, and an open positioning block is fixedly connected to the outer wall of the movable block, a receiving plate is fixedly installed on the outer wall in the middle of one side of the movable frame, the top of the receiving plate is fixedly connected to the support seat through a supporting connecting rod, a driving motor is provided on the outer wall of one side of the support seat, a rotating connecting rod is provided on the output end of the driving motor, the end of the receiving plate away from the driving motor is fixedly connected to the first rotating gear, the end of the rotating connecting rod away from the support seat is fixedly connected to the second rotating gear, and the teeth on the second rotating gear are meshed with the teeth on the first rotating gear, the end of the second rotating gear away from the support seat is rotatably connected to the lifting plate through a connecting piece, and the lifting plate is movably connected to the inner wall of the opening positioning block, and the end of the lifting plate away from the second rotating gear is provided with a limiting plate, the top of the movable block is provided with a lifting connecting rod that passes through the movable groove and extends to the outside thereof, and the top of the lifting connecting rod is fixedly connected to the motor protection box.

[0008] As a further improvement of the present invention: a servo motor is provided on the inner wall of the bottom end of the regulating box away from the placement slot, a rotating screw is provided on the output end of the servo motor, a movable sleeve is sleeved on the rotating screw, an electromagnetic strip and a fixed rod are respectively provided on the inner wall of the top end of the regulating box, the fixed rod is sleeved with a movable magnetic block connected to the movable sleeve, and the movable magnetic block is movably connected to the electromagnetic strip, one end of the movable magnetic block is provided with a movable connecting rod that penetrates the inner wall of the regulating box and extends to the inside of the placement slot, the end of the movable connecting rod away from the regulating box is fixedly connected to a liquid storage box, a liquid filling port is provided in the middle of one side of the liquid storage box, and a protective oil is stored in the liquid storage box.

[0009] As a further improvement of the present invention: a liquid outlet is provided at one end of the liquid storage box away from the regulating box, a support plate is provided on the outer wall of the end of the bottom of the liquid storage box away from the regulating box, a placement plate is fixedly installed on one side of the support plate, a driving gear and a transmission gear are respectively provided on one side of the placement plate, the driving gear and the transmission gear are meshed with each other, a first transmission motor is provided on the top outer wall of the other side of the placement plate, the output end of the first transmission motor is connected to the driving gear, and a first movable cylinder is fixedly connected to one end of the bottom of the liquid storage box close to the placement plate through a mounting piece, and a first moving block is movably connected inside the first movable cylinder.

[0010] As a further improvement of the present invention: the end of the first movable block close to the placement plate is connected to the second movable cylinder, the end of the second movable cylinder away from the first movable cylinder is provided with an arc-shaped movable frame, a movable column installed on the transmission gear is movably connected in the arc-shaped movable frame, the end of the first movable block away from the placement plate is provided with a pushing rod that passes through the first movable cylinder and extends to the outside thereof, the end of the pushing rod away from the placement plate is connected to a movable connecting frame movably installed on the liquid storage tank, a liquid collecting chamber is fixedly installed on one side of the movable connecting frame, one end of the liquid collecting chamber is provided with an infusion hose connected to the liquid outlet, and the end of the liquid collecting chamber away from the liquid storage tank is provided with an atomizing spray head.

[0011] As a further improvement scheme of the present invention: a movable box is provided on the inner wall of one end of the bottom of the liquid storage box close to the placing plate, the interior of the movable box is rotatably connected with a rotating shaft through a bearing, and the rotating shaft extending to the end of the outer side of the movable box is provided with a second transmission motor, and a rotating cam is fixedly connected to the outer wall of the rotating shaft, and a second movable plate is provided at one end of the rotating cam, and the second movable plate and the rotating cam cooperate with each other, and the end of the second movable plate away from the rotating cam is fixedly connected to the first movable rod, and the outer side of the first movable rod is movably connected to a positioning plate, one end of the positioning plate is fixedly connected to the inner wall of the movable box, the top end of the first movable rod movably extends to the outer side of the movable box and is fixedly connected to a sealing plate, and the sealing plate cooperates with the liquid outlet, and a telescopic spring is sleeved on the outer wall of the first movable rod between the second movable plate and the positioning plate.

[0012] As a further improvement scheme of the present invention: mounting plates are symmetrically arranged on the top inner wall of the placement slot away from the adjustment box, a mounting slot is opened on the mounting plate, a second movable block is movably connected in the mounting slot, a first movable plate is arranged between the two second movable blocks, return springs are symmetrically arranged at both ends of one side of the first movable plate, a rotating motor installed on the placement slot is provided in the middle position of one side of the first movable plate, and a driving member that is fitted with the first movable plate is installed on the driving end of the rotating motor.

[0013] As a further improvement of the present invention: a second movable member which is in the same straight line as the driving member is provided at one end of the first movable plate away from the return spring, a movable telescopic rod is provided in the middle of one side of the first movable plate near the mounting plate, an end of the movable telescopic rod near the cutting knife is provided with a first movable member which passes through the first movable plate, a rack is provided at one end of the first movable member near the mounting plate, a movable rack plate is provided at one end of the first movable plate near the mounting plate, a driving gear is meshed between the rack on the movable rack plate and the rack on the first movable member, and a scraper block used in conjunction with the cutting knife is fixedly connected to both the second movable member and the first movable member.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The cutting knife is driven to move up and down by the lifting structure. After the cutting knife moves upward to cut off the gate, it is moved down to the placement groove. Through the coordinated use of the rotating motor, the driving member, the first movable plate, the movable rack plate, the driving gear and the movable telescopic rod, the scraping blocks of the second movable member and the first movable member are cyclically and alternately moved to scrape off the material chips on the cutting knife. With the rotation of the rotating motor, the material chips on the surface of the cutting knife can be scraped and cleaned comprehensively. Through the above treatment, the material chips adhering to the cutting knife in the process of the cutting knife moving up to cut off the gate of the injection molded part in the device can be scraped and cleaned, so that the cutting knife is not easy to be adhered to the material chips, which is conducive to ensuring the effect of the next gate removal;

[0016] 2. The electric push rod drives the mounting seat to move back and forth, drives the adjustment box to slide outside the placement slot, and then adjusts the position of the atomizing spray head on the liquid collecting chamber in the Z-axis direction. The servo motor, the rotating screw, the movable sleeve, the movable magnetic block and the movable connecting rod are used in coordination to drive the liquid storage box to move left and right, and adjust the position of the atomizing spray head on the liquid collecting chamber in the X-axis direction. The first transmission motor, the driving gear, the transmission gear, the movable moving column, the arc-shaped movable frame, the second movable cylinder and the first movable block are used in coordination to drive the push rod to push the movable connecting frame and the liquid collecting chamber. Move and adjust the position of the atomizing spray head on the liquid collecting chamber in the Y-axis direction. The spray position of the atomizing spray head spraying the protective oil is adjusted through the above treatment. In conjunction with the rotation of the rotating motor, the protective oil can be evenly sprayed on the cutting knife. The protective oil on the surface of the cutting knife can protect the cutting knife. The above treatment can ensure that the cutting knife is not easily corroded by the injection molding material due to repeated use, and under the effect of the high-temperature resistant protective coating, the high-temperature injection molding material is not easy to corrode the cutting knife, thereby ensuring the smoothness of the surface of the injection molded workpiece and improving the quality of the injection molded workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 4 For the present invention Figure 1 Schematic diagram of the enlarged structure at C in the middle;

[0022] Figure 5 For the present invention Figure 1 Schematic diagram of the enlarged structure at D in the middle;

[0023] Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure at E in the middle;

[0024] Figure 7 It is a schematic diagram of a three-dimensional structure in which the electric push rod and the mounting seat are connected in the present invention;

[0025] Figure 8 A schematic diagram of a three-dimensional structure of a lifting structure in the present invention from one viewing angle;

[0026] Fig. 9 It is a three-dimensional structural schematic diagram of the lifting structure in the present invention from another perspective.

[0027] In the figure: 1. lower mold; 2. mold base; 3. collection box; 4. rotating motor; 5. cutting knife; 6. placement groove; 7. bearing plate; 8. molding cavity; 9. gate; 10. adjustment box; 11. electromagnetic strip; 12. fixing rod; 13. servo motor; 14. rotating screw; 15. movable sleeve; 16. electric push rod; 17. mounting seat; 18. movable magnetic block; 19. movable connecting rod; 20. liquid storage box; 21. support plate; 22. driving gear; 23. movable connecting frame; 24. infusion hose; 25. liquid collection cavity; 26. pushing rod; 27. first movable cylinder; 28. first movable block; 29. ​​second movable cylinder; 30. arc movable frame; 31. placement plate; 32. transmission gear; 33. movable Column; 34, mounting plate; 35, first movable plate; 36, first moving member; 37, second moving member; 38, scraper block; 39, second moving block; 40, driving member; 41, rotating motor; 42, movable telescopic rod; 43, driving gear; 44, moving rack plate; 45, reset spring; 46, blocking plate; 47, first moving rod; 48, moving box; 49, positioning plate; 50, telescopic spring; 51, second movable plate; 52, rotating cam; 53, rotating shaft; 54, first rotating gear; 55, moving frame; 56, opening positioning block; 57, lifting plate; 58, limit plate; 59, second rotating gear; 60, driving motor; 61, receiving plate; 62, rotating connecting rod; 63, supporting seat. DETAILED DESCRIPTION

[0028] The technical scheme of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0029] Embodiment 1:

[0030] In view of the fact that when the in-mold gate cutting device in the prior art is in use, the internal cutting knife is easily caused to adhere to the cutting knife during the process of moving up to cut off the gate of the injection molded part, thereby reducing the effect of the next gate cutting. In order to solve this problem, the following technical solution is proposed:

[0031] like Figure 1-Figure 9As shown, an in-mold gate cutting device for an injection mold comprises a lower mold 1 and a mold base 2, a lower mold 1 is provided on the top of the mold base 2, a gate 9 and a molding cavity 8 are provided on the lower mold 1, a placement groove 6 is provided on the lower mold 1, and the placement groove 6 is located below the gate 9 and the molding cavity 8, a bearing plate 7 is provided on the inner wall at the top end of the placement groove 6, an opening is provided in the middle of the bearing plate 7, a lifting structure is provided on the inner wall at the middle of the bottom end of the placement groove 6, a motor protection box is fixedly connected to the top of the lifting structure, a rotating motor 4 is installed in the motor protection box, a cutting knife 5 is provided on the output end of the rotating motor 4, collecting boxes 3 are symmetrically fixedly installed on the outer walls at both ends of the top of the moving frame 55, electric push rods 16 are symmetrically arranged on the inner wall at the top end of one side of the placement groove 6, a mounting seat 17 is provided on the output end of the electric push rod 16, and an adjustment box 10 movably connected to the outer wall of the placement groove 6 is provided between the two mounting seats 17;

[0032] The lifting structure includes a moving frame 55 vertically fixedly installed on the inner wall of the placement groove 6, the moving frame 55 is provided with a movable groove, a movable block extending to the outside of the movable groove is movably connected in the movable groove, an opening positioning block 56 is fixedly connected to the outer wall of the movable block, a receiving plate 61 is fixedly installed on the outer wall of the middle part of one side of the moving frame 55, the top of the receiving plate 61 is fixedly connected to a support seat 63 through a supporting connecting rod, a driving motor 60 is provided on the outer wall of one side of the support seat 63, a rotating connecting rod 62 is provided on the output end of the driving motor 60, and a first receiving plate 61 is fixedly connected to the end away from the driving motor 60. Rotating gear 54, one end of the rotating connecting rod 62 away from the supporting seat 63 is fixedly connected to the second rotating gear 59, and the teeth on the second rotating gear 59 are meshed with the teeth on the first rotating gear 54, and the end of the second rotating gear 59 away from the supporting seat 63 is rotatably connected to the lifting plate 57 through a connecting piece, and the lifting plate 57 is movably connected to the inner wall of the opening positioning block 56, and a limit plate 58 is provided at one end of the lifting plate 57 away from the second rotating gear 59, and a lifting connecting rod that penetrates the movable groove and extends to the outside thereof is provided on the top of the movable block, and a motor protection box is fixedly connected to the top of the lifting connecting rod;

[0033] The driving motor 60 drives the rotating connecting rod 62 to rotate, and the rotating connecting rod 62 drives the second rotating gear 59 to rotate, driving the lifting plate 57 to make reciprocating linear motion under the limit of the opening positioning block 56, and at the same time drives the movable block to reciprocate back and forth in the movable groove, drives the lifting connecting rod to move up and down, and drives the cutting knife 5 to move up and down;

[0034] A mounting plate 34 is symmetrically arranged on the top inner wall of the side of the placement slot 6 away from the adjustment box 10, and a mounting slot is opened on the mounting plate 34. A second movable block 39 is movably connected in the mounting slot, and a first movable plate 35 is arranged between the two second movable blocks 39. Return springs 45 are symmetrically arranged at both ends of one side of the first movable plate 35. A rotating motor 41 installed on the placement slot 6 is arranged in the middle position of one side of the first movable plate 35, and a driving member 40 is installed at the driving end of the rotating motor 41 to fit the first movable plate 35.

[0035] A second movable member 37 which is in the same straight line as the driving member 40 is provided at one end of the first movable plate 35 away from the return spring 45, a movable telescopic rod 42 is provided at a position in the middle of one side of the first movable plate 35 near the mounting plate 34, a first movable member 36 which passes through the first movable plate 35 is provided at one end of the movable telescopic rod 42 near the cutting knife 5, a rack is provided at one end of the first movable member 36 near the mounting plate 34, a movable rack plate 44 is provided at one end of the first movable plate 35 near the mounting plate 34, a driving gear 43 is meshed between the rack on the movable rack plate 44 and the rack on the first movable member 36, and a scraper block 38 used in conjunction with the cutting knife 5 is fixedly connected to both the second movable member 37 and the first movable member 36;

[0036] After the cutting knife 5 moves upward to cut off the gate, it moves down to the placement groove 6, and the driving member 40 is driven to rotate by the rotating motor 41. When the driving member 40 is close to the first movable plate 35, the first movable plate 35 can be moved to the right, driving the scraper block 38 on the second movable member 37 to scrape the material chips on the cutting knife 5. At the same time, the movable rack plate 44 moves to the right to drive the driving gear 43 to rotate, and then drives the first movable member 36 to move to the left to compress the movable telescopic rod 42, so that the scraper block 38 on the first movable member 36 does not contact the cutting knife 5.

[0037] When the driving member 40 is away from the first movable plate 35, the first movable plate 35 moves leftward and returns to its original position, and the scraper block 38 on the second movable member 37 moves leftward and away from the cutting knife 5. At the same time, the moving rack plate 44 moves leftward to drive the driving gear 43 to rotate in the opposite direction, thereby driving the first movable member 36 to move rightward and stretch the movable telescopic rod 42, so that the scraper block 38 on the first movable member 36 moves rightward to scrape the material chips on the cutting knife 5, so that the scraper blocks 38 of the second movable member 37 and the first movable member 36 move cyclically and alternately to scrape the material chips on the cutting knife 5, and in conjunction with the rotation of the rotating motor 4, the material chips on the surface of the cutting knife 5 can be comprehensively scraped and cleaned. Through the above processing, the material chips adhered to the cutting knife 5 in the process of the cutting knife 5 inside the device moving up to cut off the injection molded part gate 9 can be scraped and cleaned, so that the cutting knife 5 is not easy to be adhered to the material chips, which is conducive to ensuring the effect of the next gate 9 removal.

[0038] Embodiment 2:

[0039] In view of the fact that when the in-mold gate cutting device in the prior art is in use, when the cutting knife inside it cuts the gate, the surface of the cutting knife is in contact with the hot-melt material with too high a temperature, so that the surface of the cutting knife is easy to adhere to the hot-melt material, and the hot-melt material is easy to corrode the cutting knife, which not only affects the cutting effect of the cutting knife, but also the cutting surface will be uneven during cutting, affecting the surface finish of the injection molded workpiece and reducing the quality of the injection molded workpiece. In order to solve this problem, the following technical solution is proposed:

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a servo motor 13 is provided on the inner wall of the bottom end of the side of the regulating box 10 away from the placement groove 6, a rotating screw 14 is provided on the output end of the servo motor 13, a movable sleeve 15 is sleeved on the rotating screw 14, and an electromagnetic strip 11 and a fixed rod 12 are respectively provided on the inner wall of the top end of the regulating box 10, and a movable magnetic block 18 connected to the movable sleeve 15 is sleeved on the fixed rod 12, and the movable magnetic block 18 is movably connected to the electromagnetic strip 11, and one end of the movable magnetic block 18 is provided with a movable connecting rod 19 that penetrates the inner wall of the regulating box 10 and extends to the inside of the placement groove 6, and the end of the movable connecting rod 19 away from the regulating box 10 is fixedly connected to a liquid storage box 20, and a liquid injection port is provided in the middle of one side of the liquid storage box 20, and a protective oil is stored in the liquid storage box 20;

[0041] A liquid outlet is provided at one end of the liquid storage box 20 away from the regulating box 10, a support plate 21 is provided on the outer wall of the end of the bottom of the liquid storage box 20 away from the regulating box 10, a placement plate 31 is fixedly installed on one side of the support plate 21, a driving gear 22 and a transmission gear 32 are respectively provided on one side of the placement plate 31, the driving gear 22 and the transmission gear 32 are meshed, a first transmission motor is provided on the outer wall of the top of the other side of the placement plate 31, the output end of the first transmission motor is connected to the driving gear 22, a first movable cylinder 27 is fixedly connected to one end of the bottom of the liquid storage box 20 close to the placement plate 31 through a mounting piece, and a first moving block 28 is movably connected inside the first movable cylinder 27;

[0042] The end of the first movable block 28 close to the placement plate 31 is connected to the second movable cylinder 29, the end of the second movable cylinder 29 away from the first movable cylinder 27 is provided with an arc-shaped movable frame 30, and a movable column 33 installed on the transmission gear 32 is movably connected in the arc-shaped movable frame 30, and the end of the first movable block 28 away from the placement plate 31 is provided with a push rod 26 that penetrates the first movable cylinder 27 and extends to the outside thereof, and the end of the push rod 26 away from the placement plate 31 is connected to a movable connecting frame 23 movably installed on the liquid storage box 20, and a liquid collecting chamber 25 is fixedly installed on one side of the movable connecting frame 23, and a liquid infusion hose 24 connected to the liquid outlet is provided at one end of the liquid collecting chamber 25, and an atomizing spray head is provided at one end of the liquid collecting chamber 25 away from the liquid storage box 20;

[0043] Each time after the scraps on the cutting knife 5 are scraped and cleaned, the electric push rod 16 drives the mounting seat 17 to move back and forth, drives the adjustment box 10 to slide outside the placement groove 6, and then adjusts the position of the atomizing spray head on the liquid collecting chamber 25 in the Z-axis direction. The servo motor 13 drives the rotating screw 14 to rotate, drives the movable sleeve 15 to move left and right on the rotating screw 14, drives the movable magnetic block 18 and the movable connecting rod 19 to move left and right, drives the liquid storage box 20 to move left and right, and adjusts the position of the atomizing spray head on the liquid collecting chamber 25 in the X-axis direction. The machine operation drives the driving gear 22 and the transmission gear 32 to rotate, drives the moving column 33 to slide in the arc-shaped movable frame 30, drives the second movable cylinder 29 and the first movable block 28 to move, drives the push rod 26 to push the movable connecting frame 23 and the liquid collecting chamber 25 to move, and adjusts the position of the atomizing spray head on the liquid collecting chamber 25 in the Y-axis direction. Through the above-mentioned process, the spray position of the atomizing spray head spraying the protective oil agent is adjusted, and the protective oil agent can be evenly sprayed on the cutting knife 5 in conjunction with the rotation of the rotating motor 4. The protective oil agent on the surface of the cutting knife 5 can protect the cutting knife 5;

[0044] A moving box 48 is provided on the inner wall of one end of the bottom of the liquid storage box 20 near the placement plate 31, and the interior of the moving box 48 is rotatably connected to a rotating shaft 53 through a bearing, and a second transmission motor is provided at one end of the rotating shaft 53 extending to the outside of the moving box 48, and a rotating cam 52 is fixedly connected to the outer wall of the rotating shaft 53, and a second movable plate 51 is provided at one end of the rotating cam 52, and the second movable plate 51 and the rotating cam 52 cooperate with each other, and the end of the second movable plate 51 away from the rotating cam 52 is fixedly connected to the first moving rod 47, and the outer side of the first moving rod 47 is movably connected to a positioning plate 49, and one end of the positioning plate 49 is fixedly connected to the inner wall of the moving box 48, and the top end of the first moving rod 47 movably extends to the outside of the moving box 48 and is fixedly connected to a blocking plate 46, and the blocking plate 46 cooperates with the liquid outlet, and a telescopic spring 50 is sleeved on the outer wall of the first moving rod 47 located between the second movable plate 51 and the positioning plate 49;

[0045] The second transmission motor drives the rotating cam 52 to rotate, drives the second movable plate 51 to move up and down, drives the blocking plate 46 to move up and down to block the liquid outlet to change the size of the liquid outlet, control the spray amount of the protective oil, and avoid waste of resources caused by excessive spraying;

[0046] The protective oil is made by mixing high temperature resistant protective coating, chemical degreasing liquid and alkaline corrosion protection liquid. The preparation steps of the protective oil are as follows:

[0047] S1, mix 50g of sodium phosphate, 20g of sodium dihydrogen phosphate, 50g of sodium silicate, 5g of sodium alkylbenzene sulfonate and water and add water to 1000ml to make an alkaline cleaning agent, and use the prepared alkaline cleaning agent and a density of 0.995g / cm 3 The pure water is stirred evenly, and slowly heated to above 100°C to prepare a chemical degreasing liquid, and then the prepared chemical degreasing liquid is poured into the mixing and stirring equipment;

[0048] S2, 40g of sodium hydroxide, 5g of sodium sulfide and a density of 0.995g / cm 3 The pure water is stirred evenly, and then slowly heated to 50°C to prepare an alkaline corrosion protection liquid, and then the prepared alkaline corrosion protection liquid is poured into the mixing and stirring equipment;

[0049] S3, add 30g pure methylphenyl silicone resin, 15g low melting point glass powder, 5g chromium trioxide, 10g porcelain clay, 5g aluminum powder, 1g talcum powder, 2g aluminum stearate, 5g barium metaborate, 0.5g phthalate, 1g silane coupling agent, 1g xylene and a density of 0.995g / cm 3 The pure water is evenly mixed and stirred for 20 minutes. After stirring, filter it through the filter screen twice until there is no impurity on the filter plate surface. After stirring, pour the high temperature protection coating into the mixing and stirring equipment;

[0050] S4. The staff starts the mixing and stirring equipment through the switch to evenly stir the high temperature resistant protective coating, chemical degreasing liquid and alkaline corrosion protection liquid. Stir for 40 minutes while ensuring that the stirring direction of the mixing and stirring equipment remains unchanged. The stirring speed of the mixing and stirring equipment is 40 revolutions per minute. At this time, the protective oil agent can be obtained;

[0051] The high temperature resistant protective coating in the protective oil can protect the cutting knife 5 from being damaged by the high temperature injection molding raw material. When the injection molding raw material contains alkaline corrosive elements, the cutting knife 5 is not easily damaged by the alkaline corrosive elements under the protection of the alkaline corrosion protection liquid in the protective oil, thereby ensuring the service life of the cutting knife 5, and the injection molding raw material is not easily damaged due to the damage of the cutting knife 5. The chemical degreasing liquid in the protective oil can make the cutting knife 5 not easily adhered to the oil in the injection molding mold, so that the oil can drip along the cutting knife 5. When the cutting knife 5 is used, since the oil stains on the surface of the cutting knife 5 have already dripped, the cutting knife 5 is not easy to adhere the oil stains to the surface of the injection molding workpiece, thereby ensuring the quality of the injection molding workpiece. Through the above treatment, it can be ensured that the cutting knife 5 is not easily corroded by the injection molding raw material due to repeated use, and under the action of the high temperature resistant protective coating, the high temperature injection molding raw material is not easy to corrode the cutting knife, thereby ensuring the smoothness of the surface of the injection molding workpiece and improving the quality of the injection molding workpiece.

[0052] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An in-mold gate cutting device for an injection mold, comprising a lower mold (1) and a mold base (2), characterized in that: A lower mold (1) is provided on the top of the mold base (2), a gate (9) and a molding cavity (8) are provided on the lower mold (1), a placement groove (6) is provided on the lower mold (1), and the placement groove (6) is located below the gate (9) and the molding cavity (8), a bearing plate (7) is provided on the inner wall of the top end of the placement groove (6), an opening is provided in the middle of the bearing plate (7), a lifting structure is provided on the inner wall of the middle part of the bottom end of the placement groove (6), a motor protection box is fixedly connected to the top of the lifting structure, and a rotating motor is installed in the motor protection box (4), a cutting knife (5) is provided on the output end of the rotating motor (4), the lifting structure comprises a moving frame (55) vertically fixedly mounted on the inner wall of the placement groove (6), collecting boxes (3) are symmetrically fixedly mounted on the outer walls at both ends of the top of the moving frame (55), electric push rods (16) are symmetrically arranged on the inner wall of the top of one side of the placement groove (6), a mounting seat (17) is provided on the output end of the electric push rod (16), and an adjustment box (10) movably connected to the outer wall of the placement groove (6) is provided between the two mounting seats (17); A servo motor (13) is provided on the inner wall of the bottom end of the regulating box (10) away from the placement groove (6), a rotating screw (14) is provided on the output end of the servo motor (13), a movable sleeve (15) is sleeved on the rotating screw (14), an electromagnetic strip (11) and a fixed rod (12) are respectively provided on the inner wall of the top end of the regulating box (10), the fixed rod (12) is sleeved with a movable magnetic block (18) connected to the movable sleeve (15), and the movable magnetic block (18) is movably connected to the electromagnetic strip (11), one end of the movable magnetic block (18) is provided with a movable connecting rod (19) penetrating the inner wall of the regulating box (10) and extending to the inside of the placement groove (6), the end of the movable connecting rod (19) away from the regulating box (10) is fixedly connected to a liquid storage box (20), a liquid injection port is provided in the middle of one side of the liquid storage box (20), and a protective oil is stored in the liquid storage box (20); A liquid outlet is provided at one end of the liquid storage box (20) away from the regulating box (10); a support plate (21) is provided on the outer wall of one end of the bottom of the liquid storage box (20) away from the regulating box (10); a placement plate (31) is fixedly mounted on one side of the support plate (21); a driving gear (22) and a transmission gear (32) are respectively provided on one side of the placement plate (31); the driving gear (22) and the transmission gear (32) are meshed with each other; a first transmission motor is provided on the outer wall of the top of the other side of the placement plate (31); an output end of the first transmission motor is connected to the driving gear (22); a first movable cylinder (27) is fixedly connected to one end of the bottom of the liquid storage box (20) close to the placement plate (31) through a mounting member; a first movable block (28) is movably connected inside the first movable cylinder (27); The end of the first movable block (28) close to the placement plate (31) is connected to the second movable cylinder (29), the end of the second movable cylinder (29) away from the first movable cylinder (27) is provided with an arc-shaped movable frame (30), and a movable column (33) mounted on a transmission gear (32) is movably connected inside the arc-shaped movable frame (30), the end of the first movable block (28) away from the placement plate (31) is provided with a push rod (26) penetrating the first movable cylinder (27) and extending to the outside thereof, the end of the push rod (26) away from the placement plate (31) is connected to a movable connecting frame (23) movably mounted on the liquid storage box (20), a liquid collecting chamber (25) is fixedly mounted on one side of the movable connecting frame (23), one end of the liquid collecting chamber (25) is provided with a liquid infusion hose (24) connected to a liquid outlet, and the end of the liquid collecting chamber (25) away from the liquid storage box (20) is provided with an atomizing spray head; A movable box (48) is provided on the inner wall of one end of the bottom of the liquid storage box (20) close to the placement plate (31); a rotating shaft (53) is rotatably connected to the inside of the movable box (48) via a bearing; a second transmission motor is provided at one end of the rotating shaft (53) extending to the outside of the movable box (48); a rotating cam (52) is fixedly connected to the outer wall of the rotating shaft (53); a second movable plate (51) is provided at one end of the rotating cam (52); the second movable plate (51) cooperates with the rotating cam (52); the second movable plate (51) is away from the rotating cam (52). One end of the rotating cam (52) is fixedly connected to a first moving rod (47), and the outer side of the first moving rod (47) is movably connected to a positioning plate (49), and one end of the positioning plate (49) is fixedly connected to the inner wall of the moving box (48); the top end of the first moving rod (47) movably extends to the outer side of the moving box (48) and is fixedly connected to a blocking plate (46), and the blocking plate (46) is matched with the liquid outlet, and a telescopic spring (50) is sleeved on the outer wall of the first moving rod (47) located between the second movable plate (51) and the positioning plate (49); A mounting plate (34) is symmetrically arranged on the top inner wall of the side of the placement groove (6) away from the regulating box (10), the mounting plate (34) is provided with a mounting groove, a second movable block (39) is movably connected in the mounting groove, a first movable plate (35) is arranged between the two second movable blocks (39), return springs (45) are symmetrically arranged at both ends of one side of the first movable plate (35), a rotating motor (41) mounted on the placement groove (6) is arranged in the middle of one side of the first movable plate (35), and a driving member (40) arranged in contact with the first movable plate (35) is installed at the driving end of the rotating motor (41); A second movable member (37) located in the same straight line as the driving member (40) is provided at one end of the first movable plate (35) away from the return spring (45); a movable telescopic rod (42) is provided at a position in the middle of one side of the first movable plate (35) near the mounting plate (34); a first movable member (36) penetrating the first movable plate (35) is provided at one end of the movable telescopic rod (42) near the cutting knife (5); a rack is provided at one end of the first movable member (36) near the mounting plate (34); a movable rack plate (44) is provided at one end of the first movable plate (35) near the mounting plate (34); a driving gear (43) is meshedly connected between the rack on the movable rack plate (44) and the rack on the first movable member (36); and a scraper block (38) used in conjunction with the cutting knife (5) is fixedly connected to both the second movable member (37) and the first movable member (36).

2. The in-mold gate cutting device for an injection mold according to claim 1, characterized in that: The movable frame (55) is provided with a movable groove, in which a movable block extending to the outside of the movable groove is movably connected, and an opening positioning block (56) is fixedly connected to the outer wall of the movable block. A receiving plate (61) is fixedly installed on the outer wall of the middle part of one side of the movable frame (55), and the top of the receiving plate (61) is fixedly connected to a support seat (63) through a supporting connecting rod. A driving motor (60) is provided on the outer wall of one side of the support seat (63), and a rotating connecting rod (62) is provided on the output end of the driving motor (60). The end of the receiving plate (61) away from the driving motor (60) is fixedly connected to the first rotating gear (54), and the rotating connecting rod The end of (62) away from the support seat (63) is fixedly connected to the second rotating gear (59), and the teeth on the second rotating gear (59) are meshed with the teeth on the first rotating gear (54); the end of the second rotating gear (59) away from the support seat (63) is rotatably connected to the lifting plate (57) through a connecting piece, and the lifting plate (57) is movably connected to the inner wall of the opening positioning block (56); the end of the lifting plate (57) away from the second rotating gear (59) is provided with a limit plate (58); the top of the movable block is provided with a lifting connecting rod that penetrates the movable groove and extends to the outside thereof, and the top of the lifting connecting rod is fixedly connected to the motor protection box.

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