Punching device for injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold punching device which comprises a working box, a main shaft and a drilling assembly, the main shaft is installed in the working box, the drilling assembly comprises a drill bit, a limiting box, a fixing pin and a limiting piece, a fixing plane is formed on the drill bit through machining, the drill bit is detachably inserted in the lower end of the main shaft, and the limiting box is arranged on the lower end of the main shaft. The limiting box is embedded and fixedly connected to the side wall of the main shaft, the fixing pin is inserted into the limiting box in a sliding mode, the fixing pin is inserted into the drill bit, the limiting piece is fixedly connected to the peripheral wall of the fixing pin, and the limiting piece can penetrate into the limiting box and abut against the inner wall of the limiting box, so that connection between the drill bit and the main shaft is more stable; and meanwhile, the drill bit can be rapidly replaced and maintained.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an injection mold punching device. Background Art

[0002] An injection mold is a tool used to produce plastic products. It is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used for mass production of certain complex-shaped parts. Specifically, it refers to the process of injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine. After cooling and solidification, the molded product is obtained. During the processing of the injection mold, a punching device is usually used to punch holes in it.

[0003] The existing drill bit is fixed to the spindle via threads and secured to the spindle sidewall with fixing bolts. The drill bit can be replaced by loosening the fixing bolts. Discharge ports are opened on the left and right sides of the workbench and connected to discharge pipes. A screen is installed at the top of the discharge pipes, and the bottom of the discharge pipes is connected to a collection trough fixed to the base of the device. The scraps cut from the workpiece during machining are filtered through the screen. The user then uses a cleaning tool to clean the waste on the workbench into the discharge pipes, which then discharge into the collection assembly trough.

[0004] The above-mentioned existing technical solutions have the following defects: the drill bit and the main shaft rotate together for a long time, and after vibration is generated during the drilling process, the fixing bolts are easily loosened, resulting in an unstable connection between the drill bit and the main shaft, which in turn causes the drill bit to easily deviate when drilling holes in the injection mold, thereby reducing the drilling accuracy. Summary of the Invention

[0005] In order to make the connection between the drill bit and the main shaft more stable and to enable the drill bit to be replaced and repaired quickly, the present application provides an injection mold punching device.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A punching device for an injection mold comprises a working box, a main shaft and a drilling assembly, wherein the main shaft is installed in the working box, and the drilling assembly comprises a drill bit, a limit box, a fixing pin and a limit piece. A fixing plane is machined on the drill bit, and the drill bit is detachably inserted into the lower end of the main shaft. The limit box is embedded in and fixedly connected to the side wall of the main shaft, and the fixing pin is slidably inserted into the limit box. The fixing pin is inserted on the drill bit, and the limit piece is fixedly connected to the peripheral wall of the fixing pin. The limit piece can penetrate into the limit box and abut against the inner wall of the limit box.

[0008] By adopting the above technical solution, the drill bit is inserted on the main shaft, and the fixed plane is adapted to the main shaft. The setting of the fixed plane prevents the drill bit from slipping during the process of following the rotation of the main shaft. The fixing pin passes through the main shaft and is inserted on the fixed plane of the drill bit to fix the drill bit to the main shaft. The limit piece is used to abut against the limit box to fix the position of the fixing pin, thereby improving the stability of the connection between the drill bit and the main shaft, so that the drill bit will not loosen and detach from the main shaft due to the interference of rotation. The setting of the limit piece makes it easy to disassemble and assemble the fixing pin, thereby realizing rapid replacement and maintenance of the drill bit.

[0009] Optionally, the drilling assembly further includes a first limit baffle, which is fixed to the inner wall of the limit box, and the limit member can abut against the first limit baffle.

[0010] By adopting the above technical solution, the limit member passes through the limit box, and the rotating fixing pin makes the limit member abut against the inner wall of the limit box. The first limit baffle can prevent the fixing pin from excessive rotation. When removing the fixing pin, the first limit baffle can enable the limit member to quickly find the position of the hole that matches the limit member, so that the fixing pin can quickly detach from the limit box.

[0011] Optionally, the device also includes a cleaning assembly, which includes a second motor, a lead screw, a sliding shaft and a brush plate. The second motor is fixed to the outer wall of the working box, the lead screw is rotatably installed in the working box, the lead screw is fixed to the output shaft of the second motor, the sliding shaft is fixed in the working box and is spaced apart from the lead screw, and the brush plate is slidably sleeved on the sliding shaft.

[0012] By adopting the above technical solution, the lead screw is coaxially arranged with the second motor, the second motor drives the lead screw to rotate, the brush plate sliding sleeve is arranged on the sliding shaft, and the lead screw drives the brush plate to reciprocate on the sliding shaft. Metal bristles can be arranged under the brush plate to clean the metal waste on the bottom plate of the work box. Compared with manual cleaning, the cleaning efficiency of the brush plate is higher.

[0013] Optionally, two opposite inner walls of the working box are provided with accommodating grooves, and the lead screw is rotatably installed in the accommodating grooves.

[0014] By adopting the above technical solution, the lead screw is installed in the accommodating groove, which can prevent metal scraps generated during the punching process of the injection mold from splashing to the connection between the lead screw and the brush plate, reducing the possibility of metal scraps interfering with the operation of the brush plate.

[0015] Optionally, the device also includes a shell assembly, which includes a connecting plate, a base, support legs and a movable door. The working box and the base are respectively fixed to the upper and lower surfaces of the connecting plate, the support legs are fixedly installed on the lower surface of the base, and the movable door is fixed to the opening position of the working box by hinges.

[0016] By adopting the above technical solution, the injection mold that needs to be punched is placed in the work box, and the shell assembly provides stable support for the injection mold. By setting a movable door, metal scraps generated during the punching process can be prevented from splashing outside the work box, thereby improving the safety of the punching process.

[0017] Optionally, the housing assembly further includes a heat dissipation net and an observation window, wherein the heat dissipation net is embedded in the working box body, and the observation window is provided on the movable door.

[0018] By adopting the above technical solution, a heat dissipation net can be set up to dissipate the heat generated when punching in the working box, thereby avoiding excessively high temperature inside the working box interfering with the punching accuracy. The observation window can observe the punching progress and improve the yield rate.

[0019] Optionally, the device also includes an aggregate assembly, which includes a filter and an aggregate box. An aggregate hole is opened on the bottom plate of the working box, and the aggregate hole connects the working box, the connecting plate and the base. The filter is fixed above the aggregate hole, and the aggregate box is detachably inserted into the base.

[0020] By adopting the above technical solution, the collection hole can more conveniently collect the metal waste generated during the punching process, the filter can provide support for the injection mold while preventing the mold from sliding, and the collection box can collect metal waste, making it convenient to uniformly process the collected metal waste and saving time.

[0021] Optionally, the device further includes a driving assembly, which includes a movable plate, an electric push rod and a first motor. The movable plate is slidably inserted in the working box, and the electric push rod and the first motor are respectively fixedly mounted on the upper and lower surfaces of the movable plate.

[0022] By adopting the above technical solution, the setting of the movable plate facilitates the replacement of the drill bit, the first motor can rotate the main shaft and the drill bit, and the electric push rod can extend and retract the drill bit, which facilitates the drilling of the injection mold while improving the drilling accuracy.

[0023] In summary, this application has the following technical effects:

[0024] 1. The setting of the working box, spindle and drilling assembly makes the connection between the drill bit and the spindle more stable, and makes the replacement and maintenance of the drill bit more convenient;

[0025] 2. By setting up a second motor, lead screw, sliding shaft and brush plate, the metal scraps generated by punching on the bottom plate of the work box can be cleaned. Compared with manual cleaning, the cleaning efficiency of the brush plate is higher;

[0026] 3. By setting up a heat dissipation net and an observation window, the heat dissipation net can dissipate the heat generated when punching in the work box, avoiding the high temperature inside the work box that interferes with the punching accuracy. The observation window can observe the punching progress and improve the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the appearance structure diagram of this application;

[0028] Figure 2 It is a prominent structural diagram of the housing assembly, drive assembly and cleaning assembly of the present application;

[0029] Figure 3 It is a prominent structural diagram of the drilling assembly of the present application;

[0030] Figure 4 It is a prominent structural diagram of the shell component and aggregate component of this application.

[0031] Explanation of reference numerals: 1. housing assembly; 11. working box; 12. heat dissipation net; 13. connecting plate; 14. base; 141. accommodating chamber; 15. supporting leg; 16. movable door; 17. observation window; 2. driving assembly; 21. movable groove; 22. movable plate; 221. jackscrew; 23. electric push rod; 24. motor mounting seat; 25. first motor; 26. spindle; 3. drilling assembly; 31. drill bit ; 32. Fixed plane; 33. Fixed groove; 34. Limit box; 341. Box bottom; 35. Fixed pin; 351. Spherical end; 36. Limit groove; 37. Limit member; 38. First limit baffle; 4. Cleaning assembly; 41. Second motor; 42. Lead screw; 43. Receiving groove; 44. Sliding shaft; 45. Brush plate; 5. Aggregate assembly; 51. Aggregate hole; 52. Filter; 53. Aggregate box. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings.

[0033] The present application discloses an injection mold punching device, referring to Figure 2 The punching device includes a housing assembly 1, a drive assembly 2, a drilling assembly 3, a cleaning assembly 4, and a material collection assembly 5. The punching device can achieve more stable fixation of the drill bit and quick and convenient replacement and maintenance. It can also quickly clean the waste generated by drilling remaining in the device, saving time compared to manual cleaning.

[0034] Reference Figure 1The outer shell assembly 1 includes a working box 11, a heat dissipation net 12 and a connecting plate 13. The working box 11 is made of five metal plates processed as one piece. The working box 11 is provided with an opening, and the opening surface of the working box 11 is defined as the front surface. The connecting plate 13 is a metal plate and is arranged horizontally. The outer bottom surface of the working box 11 is fixed to the upper plate surface of the connecting plate 13. The heat dissipation net 12 is a metal mesh structure. There are three heat dissipation nets 12. The three heat dissipation nets 12 are respectively arranged on the three adjacent side walls of the working box 11. A rectangular mounting hole that passes through the working box 11 is provided in the center of the two side walls adjacent to the working box 11 and the connecting plate 13. The heat dissipation net 12 is fixed in the mounting hole. The heat generated during the use of the device is dissipated through the heat dissipation net 12 to prevent overheating inside the working box 11.

[0035] Reference Figure 1 The housing assembly 1 further includes a base 14, support legs 15, a movable door 16, and an observation window 17. The base 14 is made of sheet metal, with the top surface of the base 14 affixed to the lower surface of the connecting plate 13. A accommodating cavity 141 is provided inwardly on the sidewall of the base 14, facing the same direction as the opening of the working box 11. The base 14 and the connecting plate 13 are relatively heavy as a whole, enhancing stability and ensuring that the punching device does not shake during use, thereby reducing the possibility of precision errors. Two support legs 15 are arranged horizontally, each consisting of a square column and a strip plate fixed to the bottom surface of the square column. The top surface of the square column, facing away from the strip plate, is fixed to the bottom surface of the base 14.

[0036] Reference Figure 1 A movable door 16 is hingedly mounted on the work box 11. The movable door 16 is a metal plate and has two leaves. The hinges are located on either side of the opening of the work box 11. A buckle is installed on the side of the movable door 16 opposite the hinge. The two movable doors 16 are covered by the buckle at the opening of the work box 11. Both movable doors 16 are equipped with handles. The provision of the movable doors 16 prevents metal waste generated during the use of the punching device from splashing, thereby improving safety. An observation window 17 is installed in the center of the plate of one movable door 16. The observation window 17 facilitates observation of the punching progress.

[0037] Reference Figure 2The drive assembly 2 includes a movable plate 22, an electric push rod 23, a motor mounting seat 24, a first motor 25 and a spindle 26. A movable groove 21 is provided on the two opposite inner walls of the working box 11. The movable groove 21 is located above the heat dissipation net 12 and is spaced apart from the heat dissipation net 12. The movable plate 22 is a strip of metal plate. The movable plate 22 is adapted to the movable groove 21 and the two ends of the movable plate 22 are slidably inserted into the movable groove 21. By setting the movable plate 22, the movable plate 22 can be fixed to the working box 11 by two top screws 221. The top screws 221 are respectively set on the upper plate surface at both ends of the movable plate 22. The movable plate 22 is close to the opening of the working box 11, which facilitates the maintenance and replacement of the drill bit. The electric push rod 23 is fixedly set at the center of the upper plate surface of the movable plate 22. The push rod of 23 is vertically set and movably penetrates 22. The motor mounting seat 24 is a round table. The motor mounting seat 24 is set on the lower plate surface of the movable plate 22 and is fixed to the lower end of the push rod of 23. The first motor 25 is fixedly mounted on the bottom surface of the motor mounting base 24 facing away from the movable plate 22, with the rotating shaft of 25 arranged vertically downward. The main shaft 26 is fixedly connected to the rotating shaft of 25. The electric push rod 23, the motor mounting base 24 and the first motor 25 are coaxially arranged.

[0038] Reference Figure 3 The drilling assembly 3 includes a drill bit 31, which is mounted on the lower end face of the spindle 26. One end of the drill bit 31 is tapered, and a portion of the circumferential wall of the drill bit 31, away from the tapered end, is cut away along its length to form a fixed surface 32. The thickness of the cut-away portion of the circumferential wall is less than the radius of the cut surface of the drill bit 31. A fixed groove 33 is defined in the center of the end face of the spindle 26. The fixed groove 33 fits with the end of the drill bit 31 with the fixed surface 32, and the drill bit 31 can be inserted into the fixed groove 33. The spindle 26 and drill bit 31 are coaxially arranged, improving drilling accuracy. The provision of the fixed surface 32 prevents the drill bit 31 from slipping when the spindle 26 and drill bit 31 rotate together.

[0039] Reference Figure 3 The drilling assembly 3 also includes a limit box 34 and a fixing pin 35. The limit box 34 is fixedly embedded on the main shaft 26. The limit box consists of a box cover and a box bottom 341. Both the box cover and the box bottom 341 are provided with circular holes for the fixing pin 35 to pass through. When the drill bit 31 is inserted into the fixing groove 33, the outer wall of the box cover fits with the fixing plane 32. The fixing pin 35 is cylindrical, with one end of the fixing pin 35 being a spherical end 351. The other end of the fixing pin 35 is machined and formed with an annular thickened portion on the side wall. The thickened portion facilitates the rotation operation of the fixing pin 35. A limit groove 36 is provided on the fixing plane 32. The limit groove 36 is adapted to the spherical end 351 and the spherical end 351 can be inserted into the limit groove 36. By providing the fixing pin 35 and the limit groove 36, the drill bit 31 can be fixed on the main shaft 26, preventing the drill bit from detaching from the main shaft 26 during the drilling process, thereby improving the stability of the drill bit.

[0040] Reference Figure 3 The drilling assembly 3 also includes a limit piece 37, which is arranged on the peripheral wall of the fixing pin 35. The limit piece 37 is a square block, and a square hole with a shape that matches the limit piece 37 is opened on the bottom 341 of the box. The square hole and the circular hole are connected, and the square hole is located above the circular hole. The fixing pin 35 penetrates the limit box 34. When the spherical end 351 is completely fitted with the limiting groove 36, the limit piece 37 passes through the bottom 341 of the box from the square hole as a whole. The outer surface of the limit piece 37 facing away from the spherical end 351 is flush with the inner wall of the bottom 341 of the box. The outer surface of the limit piece 37 close to the spherical end 351 is processed into a protruding arc surface, which can pass through the square hole more quickly. When the limit piece 37 passes through the bottom 341 of the box, the fixing pin 35 is rotated to make the limit piece 37 stuck in the limit box 34, fixing the position of the fixing pin 35. When replacing the drill bit 31 , the fixing pin 35 is rotated to overlap the limiter 37 with the square hole, and the fixing pin 35 is removed to disengage the spherical end 351 from the fixing groove 33 , making the maintenance and replacement of the drill bit 31 more convenient and quick.

[0041] Reference Figure 3 The drilling assembly 3 also includes a first stopper 38 , which is fixedly mounted on the inner wall of the box bottom 341 . The first stopper 38 is a strip of metal plate, perpendicular to the inner wall of the box bottom 341 , and located on one side of the square hole. The plate surface of the first stopper 38 and the wall of the square hole are coplanar, with one end of the first stopper 38 positioned adjacent to the circular hole. The first stopper 38 enables the stopper 37 to quickly disengage from the limit box 34 .

[0042] Reference Figure 2 The cleaning assembly 4 includes a second motor 41, a lead screw 42, a sliding shaft 44 and a brush plate 45. Two second motors 41 are provided and are fixedly mounted on the back of the working box 11. Two lead screws 42 are provided and are rotatably mounted on the side wall of the working box 11. The two opposite inner walls of the working box 11 below the two heat dissipation nets 12 are provided with a receiving groove 43, which is located below the movable groove 21. The length direction of the receiving groove 43 is parallel to the length direction of the support leg 15, and the side wall of the receiving groove 43 away from the heat dissipation net 12 is flush with the inner wall of the bottom plate of the working box 11. A receiving groove is provided on the side wall of the receiving groove 43, and the cross-section of the inner wall of the receiving groove is an arc surface. The length of the receiving groove is consistent with that of the receiving groove 43. The two ends of the lead screw 42 are respectively rotatably mounted on the side walls of the receiving groove 43. The receiving groove 43 is coaxial with the lead screw 42 and is spaced apart. The output shaft of the second motor 41 passes through the box body of the working box 11 and is fixed to the lead screw 42. The second motor 41 is coaxial with the lead screw 42, and the second motor 41 drives the lead screw 42 to rotate through the output shaft.

[0043] Reference Figure 2Two sliding shafts 44 are provided. The two sliding shafts 44 are respectively installed in the receiving grooves 43 and are located below the lead screw 42. The two sliding shafts 44 are symmetrically installed in the two receiving grooves 43. The ends of the sliding shafts 44 are fixed to the opposite side walls of the receiving grooves 43. The length direction of the sliding shafts 44 is parallel to the length direction of the lead screw 42 and is spaced apart. Bristles are installed on one side wall of the brush plate 45. The brush plate 45 is installed between the two lead screws 42, and the length direction of the brush plate 45 is perpendicular to the length direction of the lead screw 42. The ends of the brush plate 45 are processed away from the bristles to form arc-shaped surfaces that adapt to the lead screw 42. The arc-shaped surfaces are provided with teeth. The teeth on the brush plate 45 mesh with the helical teeth on the circumference of the lead screw 42. The brush plate 45 is provided with a circular hole adapted to the sliding shaft 44 , and the circular hole is spaced apart from the arc surface. The circular hole allows both ends of the brush plate 45 to be slidably sleeved on the sliding shaft 44 , and both ends of the brush plate 45 are respectively close to the bottoms of the two accommodating grooves 43 .

[0044] Reference Figure 2 When the punching device completes punching the injection mold, the second motor 41 works, and the two lead screws 42 rotate, driving the brush plate 45 to move back and forth along the length direction of the sliding shaft 44, and using the bristles to clean the metal waste on the inner wall of the bottom plate of the working box 11, which saves time compared to manual cleaning.

[0045] Reference Figure 4 The aggregate assembly 5 includes a filter screen 52 and an aggregate box 53. The bottom plate of the working box 11 is provided with aggregate holes 51. The aggregate holes 51 are square holes. There are four aggregate holes 51. The aggregate holes 51 connect the working box 11 body, the connecting plate 13 and the base 14. The ends of the aggregate holes 51 in the length direction are flush with the bottom surfaces of the two receiving grooves 43. The four aggregate holes 51 are evenly distributed in the length direction of the receiving grooves 43. The opposite sides of the two outer aggregate holes 51 are respectively flush with the end surfaces of the receiving grooves 43. The four aggregate holes 51 can allow the metal waste generated during the punching process to evenly enter the aggregate assembly holes 51.

[0046] Reference Figure 4The filter screen 52 is a metal mesh structure, which is strip-shaped as a whole. Two filter screens 52 are provided. The two filter screens 52 are respectively fixed to the upper inner wall of the two aggregate holes 51 located in the middle. The filter screen 52 is flush with the inner wall of the working box 11, and the length direction of the filter screen 52 is parallel to the length direction of the aggregate hole 51. The placement of the injection mold is more stable by providing the filter screen 52. The aggregate box 53 is provided in the accommodating cavity 141 opened in the base 14. The shape of the aggregate box 53 is adapted to the accommodating cavity 141 and can be slidably inserted in the accommodating cavity 141. The box mouth is placed upward, and the area of the box mouth is consistent with the rectangular area surrounded by the bottom surface and end surface of the two accommodating grooves 43. The metal waste generated during the punching process directly enters the aggregate assembly box 53 from the aggregate hole 51, and the remaining part is cleaned and collected into the aggregate box 53 by the brush plate 45. The slidably inserted aggregate box 53 is convenient for processing metal waste.

[0047] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An injection mold punching device, characterized in that: The invention comprises a working box (11), a main shaft (26) and a drilling assembly (3), wherein the main shaft (26) is installed in the working box (11), and the drilling assembly (3) comprises a drill bit (31), a limit box (34), a fixing pin (35) and a limit piece (37). A fixing plane (32) is formed on the drill bit (31), and the drill bit (31) is detachably inserted into the lower end of the main shaft (26). The limit box (34) is embedded in and fixed to the side wall of the main shaft (26). The fixing pin (35) is slidably inserted into the limit box (34), and the fixing pin (35) is inserted on the drill bit (31). The limit piece (37) is fixed to the peripheral wall of the fixing pin (35), and the limit piece (37) can penetrate the limit box (34) and abut against the inner wall of the limit box (34).

2. The injection mold punching device according to claim 1, characterized in that: The drilling assembly (3) further comprises a first limit baffle (38), the first limit baffle (38) being fixed to the inner wall of the limit box (34), and the limit member (37) being capable of abutting against the first limit baffle (38).

3. The injection mold punching device according to claim 1, characterized in that: The device also includes a cleaning assembly (4), which includes a second motor (41), a lead screw (42), a sliding shaft (44) and a brush plate (45). The second motor (41) is fixed to the outer wall of the working box (11), the lead screw (42) is rotatably installed in the working box (11), the lead screw (42) is fixed to the output shaft of the second motor (41), the sliding shaft (44) is fixed to the working box (11) and is spaced apart from the lead screw (42), and the brush plate (45) is slidably sleeved on the sliding shaft (44).

4. The injection mold punching device according to claim 3, characterized in that: The two opposite inner walls of the working box (11) are both provided with an accommodating groove (43), and the lead screw (42) is rotatably installed in the accommodating groove (43).

5. The injection mold punching device according to claim 1, characterized in that: The device further comprises a housing assembly (1), the housing assembly (1) comprising a connecting plate (13), a base (14), supporting legs (15) and a movable door (16); the working box (11) and the base (14) are respectively fixed to the upper and lower surfaces of the connecting plate (13); the supporting legs (15) are fixedly mounted on the lower surface of the base (14); and the movable door (16) is fixed to the opening position of the working box (11) by a hinge.

6. The injection mold punching device according to claim 5, characterized in that: The housing assembly (1) further comprises a heat dissipation net (12) and an observation window (17); the heat dissipation net (12) is embedded in the working box (11) body, and the observation window (17) is provided on the movable door (16).

7. The injection mold punching device according to claim 5, characterized in that: The device also includes a material collection component (5), the material collection component (5) includes a filter (52) and a material collection box (53), a material collection hole (51) is opened on the bottom plate of the working box (11), the material collection hole (51) is connected to the working box (11), the connecting plate (13) and the base (14), the filter (52) is fixed above the material collection hole (51), and the material collection box (53) is detachably inserted into the base (14).

8. The injection mold punching device according to claim 1, characterized in that: The device also includes a driving assembly (2), which includes a movable plate (22), an electric push rod (23) and a first motor (25). The movable plate (22) is slidably inserted into the working box (11), and the electric push rod (23) and the first motor (25) are respectively fixedly mounted on the upper and lower surfaces of the movable plate (22).

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