Visual forming device for pencil lead preparation

Abstract

The invention provides a visual forming device for pencil lead preparation. The visual forming device comprises a supporting base, a forming mold, a forming driving part and a feeding assembly. The forming die is arranged on the supporting base and provided with a plurality of forming cavities, and the forming cavities are arranged in a linear array. The forming driving part is installed on the supporting base, moves in the length direction of the forming cavity and is used for pushing the pencil lead raw material rod into the forming cavity and conducting extrusion forming on the pencil lead raw material rod in a pressurized mode; the feeding assembly is installed on the supporting base and used for automatically and continuously providing pencil lead raw material bars for the forming cavity and pushing the pencil lead raw material bars into the forming cavity through the forming driving piece. The feeding assembly is used for achieving automatic and continuous feeding of pencil lead raw material bars, the forming driving piece and the forming mold are matched, the forming process of pencil leads can be rapidly and efficiently achieved, the production efficiency of the pencil leads is greatly improved, and the automatic pencil lead forming device has the beneficial effects of being simple in structure and convenient and fast to operate.

Description

Technical Field

[0001] This invention relates to the field of molding apparatus technology, and more specifically to a visual molding apparatus for preparing pencil leads. Background Technology

[0002] The production of pencil leads is a precise process, the core of which lies in mixing graphite powder and clay in a specific ratio to create products with different hardness levels. The entire process begins with the selection and proportioning of raw materials. High-purity natural graphite is ground into an extremely fine powder, while clay serves as a binder and a key component for adjusting hardness. The ratio of graphite to clay directly determines the final hardness of the lead—the higher the graphite content, the softer the lead and the darker the lines drawn; the higher the clay content, the harder the lead and the lighter the lines. After precise weighing, these two raw materials are fed into a large mixer, where an appropriate amount of water is added and stirred into a uniform, fine paste-like slurry.

[0003] The mixed paste is then fed into a high-pressure extruder. Under immense pressure, the paste is extruded through a mold with small holes of a specific diameter, forming continuous, thin strips, resembling thin noodles—the prototype of the pencil lead. These soft, wet strips are then carefully cut into pencil-length segments and neatly placed on trays, which are then sent to a long drying kiln for slow and even drying. The drying process is crucial; it removes most of the moisture, making the pencil lead blanks firm for subsequent processing, but it cannot dry too quickly, otherwise it will crack or deform.

[0004] For example, a utility model patent with application number 202221471054.2, entitled "A Utility Model Patent for a Composite Material Pencil Lead Molding Device," includes a workbench and a cylinder. A lead mold is fixedly connected to the top of the workbench. The key feature is that a cutting mechanism is provided at one end of the lead mold at the top of the workbench. The cutting mechanism includes a rack fixedly connected to the outer wall of the cylinder's output end. A large spur gear is rotatably connected to the top of the workbench. A support base is fixedly connected to the top of the workbench. A reciprocating lead screw is rotatably connected to the top of the workbench. A first small spur gear is fixedly connected to the outer wall of the bottom end of the reciprocating lead screw. A first slider is slidably connected to the inner side of the support base. A second slider is slidably connected to the inner side of the first slider. A cutting blade is fixedly connected to one end of the second slider. An adjustment mechanism extending through to the top of the first slider is provided inside the first slider for adjusting the position of the cutting blade.

[0005] This patent, by setting up a cutting mechanism and an adjustment mechanism, allows the position of the cutting blade to be adjusted according to the required length of the pen refill. When the cylinder output end extends, it drives the rack to move synchronously to one end, thereby driving the large spur gear to rotate. The rotation of the large spur gear drives the first small spur gear to rotate, thereby driving the first slider to drive the cutting blade to move back and forth through the second slider. The reciprocating movement of the cutting blade cuts the pen refill discharged from the pen refill mold output end. Through the cooperation of the above multiple parts, the function of cutting the formed pen refill is realized, while making full use of the power of the cylinder.

[0006] However, in the process of mass production of pencil leads, the existing lead forming device requires manual feeding after completing one forming operation, and can only process one pencil lead raw material rod in a single pencil lead forming process, which greatly reduces the forming efficiency of pencil leads and has certain defects.

[0007] In view of the above, this application is hereby submitted. Summary of the Invention

[0008] The purpose of this invention is to provide a visual forming device for pencil lead preparation, so as to solve the problems mentioned in the background art.

[0009] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: Embodiments of the present invention provide a visual molding device for pencil lead preparation, including a support base, a molding die, a molding drive component, and a feeding assembly; The molding die is fixedly mounted on the support base. The molding die has multiple molding cavities, and the multiple molding cavities are arranged in a linear array. The molding drive is mounted on the support base and moves along the length of the molding cavity. The molding drive is used to push the pencil lead raw material rod into the molding cavity and to extrude the pencil lead raw material rod under pressure. The feeding assembly is mounted on the support base and is located above the feed inlet of the molding cavity. The feeding assembly is used to automatically and continuously supply pencil lead raw material rods to the molding cavity and push them into the molding cavity through the molding drive component.

[0010] Furthermore, a feed inlet is provided on the side of the molding cavity near the molding drive member, and the end of the feed inlet has a chamfered structure. An extrusion molding sleeve is detachably installed on the end of the molding cavity away from the feed inlet, and a plurality of molding holes are evenly provided on the extrusion molding sleeve.

[0011] Furthermore, the molding drive component includes a drive disk, a drive motor, a drive base, a transmission link, and a molding pressure bar; The drive disk is rotatably mounted on the support base, and a transmission column is mounted on the drive disk, with the transmission column offset from the center of the drive disk. The drive motor is fixedly mounted on the support base, and the output shaft of the drive motor is connected to the drive disk for transmission. The drive seat is mounted on the support base, and the drive seat is used to convert the rotational power of the drive disk into linear drive. The two ends of the transmission link are rotatably connected to the transmission column and the drive seat, respectively, and the transmission link is used to transmit power. The forming pressure rod is provided in multiple forms, and the multiple forming pressure rods are fixedly installed on the drive seat. The forming pressure rod is used to push the pencil lead raw material rod into the forming cavity, and to extrude and form it through the extrusion forming sleeve.

[0012] Furthermore, the drive base includes a movable guide rail, a connecting push rod, and a drive frame; The movable guide rail is fixedly installed on the support base. Two movable guide rails are arranged in parallel, and the two movable guide rails are arranged along the length direction of the molding cavity. The connecting push rod is slidably mounted on the moving guide rail, and the connecting push rod is rotatably connected to the transmission link; The drive frame is fixedly mounted on the connecting push rod. The drive frame has an installation plane perpendicular to the length direction of the molding cavity, and the molding pressure rod is fixedly mounted on the installation plane.

[0013] Furthermore, the outer diameter of the forming pressure rod is equal to the inner diameter of the forming cavity. Multiple hole-cleaning columns are fixedly provided at the end of the forming pressure rod away from the drive frame, and the outer diameter of the hole-cleaning columns matches the inner diameter of the forming hole. The end of the hole-cleaning columns away from the forming pressure rod has a rounded corner structure.

[0014] Furthermore, the feeding assembly includes a connecting guide bar, a storage hopper, and a traveling assembly; The connecting guide bar is installed on the support base and is located between the drive seat and the molding die. The connecting guide bar is provided with a conveying channel that matches the molding cavity. The storage hopper is positioned above the connecting guide strip and moves along the length of the connecting guide strip. The storage hopper is used for temporary storage of pencil lead raw material rods. The traveling component is mounted on the support base and is located above the storage hopper. The traveling component is used to drive the storage hopper to reciprocate along the length of the connecting guide bar and to feed the pencil lead raw material rods in the storage hopper into the conveying channel one by one.

[0015] Furthermore, there is a conveying gap between the storage hopper and the connecting guide strip, the conveying gap being used to convey the pencil lead raw material rods, and a positioning support wheel is rotatably installed at the bottom of the storage hopper, and the positioning support wheel is in close contact with the upper surface of the support base.

[0016] Furthermore, a maintenance door is rotatably provided on the side of the storage hopper, and a transparent observation window is provided on the maintenance door. A discharge port for moving a single pencil lead rod is opened at the bottom of the storage hopper, and positioning rollers are rotatably installed on two side walls along the moving direction of the storage hopper. The positioning rollers are used to guide the pencil lead rod to move into the molding cavity.

[0017] Furthermore, the traveling assembly includes a positioning rail, a traveling lead screw, a drive block, and a traveling motor; The positioning rail is fixedly installed on the support base, and the positioning rail is located above the connecting guide bar; The travel screw is rotatably mounted on the positioning rail; The drive block is fixedly installed on the storage hopper, the top of the drive block is slidably connected to the positioning rail, and the drive block is threadedly connected to the travel screw. The travel motor is fixedly installed on the side wall of the positioning rail, and the output shaft of the travel motor is connected to the travel lead screw.

[0018] Furthermore, the travel screw is a reciprocating screw, and the travel motor is a servo motor.

[0019] The above-described solution of the present invention has at least the following beneficial effects: This invention can automatically perform batch feeding of pencil lead raw material rods during the pencil lead forming process. At the same time, in conjunction with the forming drive and forming mold, it can perform the forming operation of multiple pencil lead raw material rods simultaneously. The combination of the two effectively ensures the forming efficiency of pencil lead raw material rods and has the characteristics of simple structure and convenient operation.

[0020] Furthermore, the pencil lead raw material rods can be temporarily stored in the storage hopper, which can ensure the effective storage amount of pencil lead raw material rods. At the same time, the pencil lead raw material rods in the storage hopper can be transported one by one into the conveying channel. The combination of the two effectively ensures the stable feeding of pencil lead raw material rods, thereby ensuring the stability of the molding device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a visual molding device for preparing pencil leads provided by the present invention; Figure 2 This is a top view of a visual molding device for preparing pencil leads provided by the present invention. Figure 3 This is a right-side view of a visualization molding device for preparing pencil leads provided by the present invention. Figure 4 A front view of a visual molding apparatus for preparing pencil leads provided by the present invention; Figure 5 This invention provides a schematic diagram of the cross-sectional structure of the storage hopper of a visual molding device for preparing pencil leads; Figure 6 This is a schematic diagram of the hole-cleaning column distribution structure of a visual molding device for pencil lead preparation provided by the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Support base; 2. Molding mold; 3. Molding drive component; 4. Feeding assembly; 5. Molding cavity; 6. Feed inlet; 7. Extrusion molding sleeve; 8. Molding hole; 9. Drive plate; 10. Drive motor; 11. Drive seat; 12. Transmission connecting rod; 13. Molding pressure rod; 14. Transmission column; 15. Moving guide rail; 16. Connecting push rod; 17. Drive frame; 18. Mounting plane; 19. Hole cleaning column; 20. Connecting guide bar; 21. Storage hopper; 22. Traveling assembly; 23. Conveying channel; 24. Positioning support wheel; 25. Maintenance door; 26. Transparent observation window; 27. Discharge port; 28. Positioning roller; 29. ​​Positioning hanging rail; 30. Traveling screw; 31. Drive block; 32. Traveling motor. Detailed Implementation

[0023] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0024] like Figures 1 to 6 As shown, an embodiment of the present invention provides a visual molding device for pencil lead preparation, including a support base 1, a molding die 2, a molding drive 3, and a feeding assembly 4.

[0025] Specifically, the molding mold 2 is fixedly mounted on the support base 1, and the molding mold 2 has multiple molding cavities 5, which are arranged in a linear array.

[0026] The molding drive 3 is mounted on the support base 1 and moves along the length of the molding cavity 5. The molding drive 3 is used to push the pencil lead raw material rod into the molding cavity 5 and to extrude the pencil lead raw material rod under pressure.

[0027] The feeding component 4 is installed on the support base 1 and is located above the feed port 6 of the molding cavity 5. The feeding component 4 is used to automatically and continuously provide pencil lead raw material rods to the molding cavity 5 and push them into the molding cavity 5 through the molding drive component 3.

[0028] In this embodiment, when pencil lead forming is required, pencil lead raw material rods are placed into the feeding assembly 4. Initially, the forming drive 3 and the forming mold 2 are separated, and the feeding assembly 4 places the pencil lead raw material rods one by one at the inlet side of the forming cavity 5. Subsequently, the forming drive 3 simultaneously pushes multiple pencil lead raw material rods into the forming cavity 5 and extrudes and forms them. The extruded flexible pencil lead rods are discharged from the side of the forming cavity 5 away from the forming drive 3, completing a single extrusion forming operation of the pencil lead. Finally, the forming drive 3 separates from the forming cavity 5, and the feeding assembly 4 places the pencil lead raw material rods one by one at the inlet side of the forming cavity 5, preparing for the next extrusion forming of the pencil lead. This process is repeated to achieve automatic continuous extrusion forming of pencil leads, greatly improving the forming efficiency of pencil leads.

[0029] Compared with existing technologies, this solution can automatically realize the batch feeding of pencil lead raw material rods during the pencil lead forming process. At the same time, in conjunction with the forming drive 3 and the forming mold 2, it can perform the forming operation of multiple pencil lead raw material rods simultaneously. The combination of the two effectively ensures the forming efficiency of pencil lead raw material rods and has the characteristics of simple structure and convenient operation.

[0030] It should be noted that the pencil lead raw material rod is a rod-shaped object made of graphite and clay, and is an intermediate product before the pencil lead is extruded. The pencil lead raw material rod is then extruded with the cooperation of the molding drive 3 and the molding die 2.

[0031] Furthermore, the molding cavity 5 is provided with a feed port 6 on the side near the molding drive 3, and the end of the feed port 6 has a chamfered structure. An extrusion molding sleeve 7 is detachably installed on the end of the molding cavity 5 away from the feed port 6, and a plurality of molding holes 8 are evenly provided on the extrusion molding sleeve 7.

[0032] In this embodiment, the feeding assembly 4 places the pencil lead raw material on the feed port 6 side of each molding cavity 5, preparing for the extrusion molding of the pencil lead raw material rod. Subsequently, the molding drive 3 pushes the pencil lead raw material rod into the molding cavity 5 along the feed port 6 and extrudes the pencil lead raw material rod located in the molding cavity 5. The pencil lead raw material rod extruded by the molding drive 3 is discharged from the molding hole 8 on the side of the extrusion molding sleeve 7. The large-diameter pencil lead raw material rod is extruded and formed into a flexible strip of pencil lead after being formed by the molding hole 8. The flexible strip of pencil lead is then cut and dried to produce pencil lead. The feed port 6 side is chamfered to form an inclined surface. Under the push of the molding drive 3, the chamfered structure can guide the pencil lead raw material rod into the molding cavity 5.

[0033] Furthermore, the molding drive component 3 includes a drive disk 9, a drive motor 10, a drive base 11, a transmission link 12, and a molding pressure rod 13.

[0034] Specifically, the drive disk 9 is rotatably mounted on the support base 1, and a transmission column 14 is mounted on the drive disk 9, with the transmission column 14 offset from the center position of the drive disk 9.

[0035] The drive motor 10 is fixedly installed on the support base 1, and the output shaft of the drive motor 10 is connected to the drive disk 9 for transmission.

[0036] The drive seat 11 is mounted on the support base 1, and the drive seat 11 is used to convert the rotational power of the drive disk 9 into linear drive. The two ends of the transmission link 12 are rotatably connected to the transmission column 14 and the drive seat 11, respectively, and the transmission link 12 is used to transmit power.

[0037] Multiple forming pressure rods 13 are provided, and the multiple forming pressure rods 13 are fixedly installed on the drive seat 11. The forming pressure rods 13 are used to push the pencil lead raw material rod into the forming cavity 5, and are extruded and formed by the extrusion forming sleeve 7.

[0038] In this embodiment, after the feeding component 4 completes the placement of the pencil lead raw material rod, that is, the pencil lead raw material is placed to the side of the inlet 6, the pencil lead raw material rod needs to be pushed into the molding cavity 5. The specific operation is as follows: When the drive motor 10 is turned on, the drive disk 9 rotates under its drive. The transmission link 12, which is rotatably connected to the drive disk 9, converts the rotational power of the drive disk 9 into the linear movement power of the drive seat 11. Under the power transmission of the transmission link 12, the multiple forming pressure rods 13 located on the drive seat 11 move towards the forming cavity 5. The forming pressure rods 13 push the pencil lead raw material rod into the forming cavity 5 and apply pressure to the pencil lead raw material rod located in the forming cavity 5. Finally, the pencil lead raw material rod is extruded from one side of the extrusion forming sleeve 7 and formed into a flexible strip of pencil lead, completing the intermediate product production of pencil lead.

[0039] The forming pressure rod 13 is in close and sliding contact with the inner wall of the forming cavity 5. When the forming pressure rod 13 moves towards the extrusion forming sleeve 7 in the forming cavity 5, it can apply good pressure to the pencil lead raw material rod in the forming cavity 5, thereby realizing the extrusion forming operation of the pencil lead.

[0040] In one specific embodiment, the drive base 11 includes a movable guide rail 15, a connecting push rod 16, and a drive frame 17. The movable guide rail 15 is fixedly mounted on the support base 1, and two movable guide rails 15 are arranged in parallel, with the two movable guide rails 15 extending along the length direction of the molding cavity 5. The connecting push rod 16 is slidably mounted on the movable guide rail 15, and the connecting push rod 16 is rotatably connected to the transmission connecting rod 12. The drive frame 17 is fixedly mounted on the connecting push rod 16, and the drive frame 17 has a mounting plane 18 perpendicular to the length direction of the molding cavity 5, and the molding pressure rod 13 is fixedly mounted on the mounting plane 18.

[0041] Driven by the drive motor 10, the drive disk 9 rotates, and the transmission column 14, which is off-center from the drive disk 9, rotates along with the drive disk 9. Subsequently, the transmission connecting rod 12 converts the eccentric motion of the transmission column 14 into the power for the linear motion of the connecting push rod 16. The connecting push rod 16 drives the drive frame 17 and the forming pressure rod 13 to move linearly, and then pushes the pencil lead raw material rod into the forming cavity 5 through the forming pressure rod 13, and performs an extrusion molding operation on the pencil lead raw material rod located in the forming cavity 5.

[0042] Driven by the drive motor 10, the drive disc 9 reciprocates, and simultaneously, through the power transmission via the transmission link 12, the drive frame 17 and the forming pressure rod 13 reciprocate linearly. As the drive frame 17 and the forming pressure rod 13 move towards the forming cavity 5, the pencil lead raw material rods are extruded. When the drive frame 17 and the forming pressure rod 13 move away from the forming cavity 5 and reach the end position, the feeding assembly 4 places the pencil lead raw material rods one by one onto the feed inlet 6 side of the forming cavity 5, preparing for the next pencil lead raw material rod extrusion molding operation.

[0043] In addition, the outer diameter of the forming pressure rod 13 is equal to the inner diameter of the forming cavity 5. Multiple hole-cleaning columns 19 are fixedly provided at the end of the forming pressure rod 13 away from the drive frame 17, and the outer diameter of the hole-cleaning column 19 matches the inner diameter of the forming hole 8. The end of the hole-cleaning column 19 away from the forming pressure rod 13 has a rounded corner structure.

[0044] The outer diameter of the forming pressure rod 13 is equal to the inner diameter of the forming cavity 5. As the forming pressure rod 13 moves towards the forming cavity 5, it effectively applies pressure to the pencil lead material rod located within the forming cavity 5, ensuring the smooth extrusion molding process. Furthermore, the cleaning column 19 located at the end of the forming pressure rod 13 can pass through the forming hole 8 and reach the outside of the extrusion molding sleeve 7 when the forming pressure rod 13 reaches the side of the extrusion molding sleeve 7. During the process of the cleaning column 19 penetrating the forming hole 8, it can extrude any residual pencil lead material located within the forming hole 8, preventing the pencil lead material from solidifying within the forming hole 8 and causing blockage.

[0045] It should be noted that if the speed of the drive motor 10 is too high, causing the linear motion speed of the forming rod to be too fast, a reduction gearbox can be installed between the drive motor 10 and the drive disc 9. The reduction gearbox reduces the speed of the drive disc 9, thereby increasing the time for the drive disc 9 to rotate one revolution, thus ensuring the smooth operation of the pencil lead rod extrusion molding process.

[0046] Furthermore, the feeding assembly 4 includes a connecting guide bar 20, a storage hopper 21, and a traveling assembly 22.

[0047] Specifically, the connecting guide bar 20 is installed on the support base 1, and the connecting guide bar 20 is located between the drive base 11 and the molding mold 2. The connecting guide bar 20 is provided with a conveying channel 23 that matches the molding cavity 5.

[0048] The storage hopper 21 is positioned above the connecting guide bar 20 and moves along the length of the connecting guide bar 20. The storage hopper 21 is used for temporary storage of pencil lead raw material rods.

[0049] The traveling component 22 is mounted on the support base 1 and is located on the upper part of the storage hopper 21. The traveling component 22 is used to drive the storage hopper 21 to reciprocate along the length direction of the connecting guide bar 20 and to feed the pencil lead raw material rods located in the storage hopper 21 into the conveying channel 23 one by one.

[0050] In this embodiment, before extruding the pencil lead raw material, the pencil lead raw material rods are placed in the storage hopper 21 for temporary storage. Initially, the storage hopper 21 is located at the end of the connecting guide bar 20, and the upper surface of the connecting guide bar 20 restricts the pencil lead raw material rods from moving out of the storage hopper 21. When a feeding operation of the pencil lead raw material rods is required, the traveling component 22 drives the storage hopper 21 to move along the length direction of the connecting guide bar 20. During the movement of the storage hopper 21, when the conveying channel 23 on the connecting guide bar 20 is aligned with the discharge port 27 of the storage port, the pencil lead raw material rods in the storage hopper 21 fall into the conveying channel 23. Similarly, as the storage hopper 21 moves, the pencil lead raw material rods in the storage hopper 21 fall one by one into the conveying channel 23, completing the feeding operation of the pencil lead raw material rods. After the pencil lead raw material rods have been fed, the storage hopper 21 moves to the other end of the connecting guide bar 20. The upper surface of the connecting guide bar 20 supports the pencil lead raw material rods located at the bottom of the storage hopper 21, preventing the pencil lead raw material rods from being discharged from the storage hopper 21.

[0051] Compared to existing technologies, the pencil lead raw material rods in this solution can be temporarily stored in the storage hopper 21, which can ensure the effective storage amount of pencil lead raw material rods. At the same time, the pencil lead raw material rods located in the storage hopper 21 can be transported one by one to the conveying channel 23. The combination of the two effectively ensures the stable feeding of pencil lead raw material rods, thereby ensuring the stability of the molding device.

[0052] In one specific embodiment, a conveying gap is provided between the storage hopper 21 and the connecting guide strip 20. This conveying gap is used to convey pencil lead raw material rods. A positioning support wheel 24 is rotatably mounted on the bottom of the storage hopper 21, and the positioning support wheel 24 is in close contact with the upper surface of the support base 1. The positioning support wheel 24 provides support for the storage hopper 21.

[0053] The conveying gap between the storage hopper 21 and the connecting guide bar 20 is greater than the radius of the pencil lead raw material rod, but smaller than the diameter of the pencil lead raw material rod. The specific reason is: When the conveying gap is greater than the radius of the pencil lead rod, the pencil lead rod moves along the upper surface of the connecting guide bar 20 before falling into the conveying channel 23. When the pencil lead rod falls into the conveying channel 23, the upper part of the pencil lead rod is located outside the conveying channel 23. When the conveying gap is greater than the radius of the pencil lead rod, there is a gap between the bottom of the storage hopper 21 and the pencil lead rod falling into the conveying channel 23, which will not cause cutting damage to the pencil lead rod falling into the conveying channel 23. When the conveying gap is less than the radius of the pencil lead rod, the bottom of the storage hopper 21 can cut and remove the top of the pencil lead rod falling into the conveying channel 23.

[0054] When the conveying gap is smaller than the diameter of the pencil lead rod, the bottom of the storage hopper 21 can push the pencil lead rod along the upper surface of the connecting guide bar 20 before the pencil lead falls into the conveying channel 23. Once the pencil lead rod reaches the conveying channel 23, it falls into the channel, completing the pencil lead loading operation. When the conveying gap is larger than the diameter of the pencil lead rod, the bottom of the storage hopper 21 cannot move the pencil lead rod along the upper surface of the connecting guide bar 20, thus preventing the pencil lead loading operation from being completed. Therefore, a conveying gap larger than the radius of the pencil lead rod but smaller than its diameter effectively ensures stable conveying and maintains the integrity of the pencil lead rod's shape.

[0055] In addition, a maintenance door 25 is rotatably provided on the side of the storage hopper 21, and a transparent observation window 26 is provided on the maintenance door 25. The bottom of the storage hopper 21 is provided with a discharge port 27 for moving a single pencil lead raw material rod. Positioning rollers 28 are rotatably installed on two side walls of the discharge port 27 along the moving direction of the storage hopper 21. The positioning rollers 28 are used to guide the pencil lead raw material rod to move into the molding cavity 5.

[0056] The pencil lead raw material rods are temporarily stored in the storage hopper 21. To facilitate the resolution of the blockage problem in the storage hopper 21, a maintenance door 25 is installed on the side of the storage hopper 21. On-site operators can directly observe whether there is a blockage in the storage hopper 21 through the transparent observation window 26. When a blockage occurs in the storage hopper 21, the maintenance door 25 can be opened to adjust the position of the blocked pencil lead raw material rods in the storage hopper 21 to ensure smooth feeding of the pencil lead raw material rods.

[0057] Meanwhile, as the pencil lead rod moves along the upper surface of the connecting guide strip 20, the guide roller reduces the friction between itself and the surface of the pencil lead rod by rotating, which can effectively reduce the probability of deformation of the pencil lead rod, thereby ensuring that the pencil lead rod can be smoothly pushed into the molding cavity 5 and complete the pencil lead extrusion molding operation.

[0058] Furthermore, the traveling assembly 22 includes a positioning rail 29, a traveling lead screw 30, a drive block 31, and a traveling motor 32.

[0059] Specifically, the positioning rail 29 is fixedly installed on the support base 1, and the positioning rail 29 is located above the connecting guide bar 20.

[0060] The travel screw 30 is rotatably mounted on the positioning rail 29.

[0061] The drive block 31 is fixedly installed on the storage hopper 21. The top of the drive block 31 is slidably connected to the positioning rail 29, and the drive block 31 is threadedly connected to the travel screw 30.

[0062] The travel motor 32 is fixedly installed on the side wall of the positioning rail 29, and the output shaft of the travel motor 32 is connected to the travel lead screw 30 for transmission.

[0063] In this embodiment, when it is necessary to feed pencil lead rods, the travel motor 32 is turned on. Driven by the travel motor 32, the travel screw 30, which is connected to the output shaft of the travel motor 32, rotates. The drive block 31, which is threadedly connected to the travel screw 30, cannot rotate with the travel screw 30 due to the restriction of the positioning rail 29. The drive block 31 can only move the storage hopper 21 along the length of the travel screw 30. During the movement of the storage hopper 21, the pencil lead rods located in the storage hopper 21 are conveyed one by one into the conveying channel 23, completing the feeding operation of the pencil lead rods.

[0064] In one specific embodiment, the traveling screw 30 is a reciprocating screw. Driven by the traveling motor 32, the traveling screw 30 enables the hopper 21 to reciprocate along the length of the connecting guide strip 20. During the outward journey of the hopper 21, the hopper 21 transports the pencil lead raw material rods inside it to the conveying track. After the pencil lead raw material rods are loaded, the molding drive 3 cooperates with the molding die 2 to realize the pencil lead extrusion molding operation. After the pencil lead extrusion molding operation is completed, the hopper 21 returns, transporting the pencil lead raw material rods inside it to the conveying channel 23, preparing for the next pencil lead extrusion molding operation. This reciprocating process enables automatic and continuous pencil lead extrusion molding, greatly improving the pencil lead molding efficiency.

[0065] Furthermore, the travel motor 32 is a servo motor. A servo motor is an engine that controls the operation of mechanical components in a servo system; it is a type of auxiliary motor with indirect speed change. Servo motors can control speed with very high positional accuracy, converting voltage signals into torque and speed to drive the controlled object. The rotor speed of a servo motor is controlled by the input signal and can respond quickly. In automatic control systems, it is used as an actuator and has characteristics such as a small electromechanical time constant and high linearity. It can convert received electrical signals into angular displacement or angular velocity output on the motor shaft. The use of a servo motor in the travel motor 32 enables precise control of the movement position of the storage hopper 21, thereby ensuring the smooth operation of feeding pencil lead raw material rods.

[0066] Unlike existing technologies, the present invention has at least the following beneficial effects: This invention can automatically perform batch feeding of pencil lead raw material rods during the pencil lead forming process. At the same time, in conjunction with the forming drive and forming mold, it can perform the forming operation of multiple pencil lead raw material rods simultaneously. The combination of the two effectively ensures the forming efficiency of pencil lead raw material rods and has the characteristics of simple structure and convenient operation.

[0067] Furthermore, the pencil lead raw material rods can be temporarily stored in the storage hopper, ensuring an effective storage capacity. Simultaneously, the pencil lead raw material rods in the storage hopper can be individually conveyed into the conveying channel. This combination effectively ensures a stable feeding of pencil lead raw material rods, thereby guaranteeing the stability of the molding device. The above description represents a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles described in this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. A visual forming device for pencil lead preparation, characterized in that: It includes a support base (1), a molding die (2), a molding drive component (3), and a feeding assembly (4); The molding die (2) is fixedly mounted on the support base (1). The molding die (2) has multiple molding cavities (5), and the multiple molding cavities (5) are arranged in a linear array. The molding drive (3) is mounted on the support base (1), and the molding drive (3) moves along the length direction of the molding cavity (5). The molding drive (3) is used to push the pencil lead raw material rod into the molding cavity (5) and to extrude the pencil lead raw material rod under pressure. The feeding component (4) is installed on the support base (1) and the feeding component (4) is located above the feed inlet (6) of the molding cavity (5). The feeding component (4) is used to automatically and continuously provide pencil lead raw material rods to the molding cavity (5) and push them into the molding cavity (5) through the molding drive component (3).

2. The visual forming device for pencil lead preparation according to claim 1, characterized in that: The molding cavity (5) is provided with a feed port (6) on the side near the molding drive (3), and the end of the feed port (6) has a chamfered structure. The end of the molding cavity (5) away from the feed port (6) is detachably equipped with an extrusion molding sleeve (7), and the extrusion molding sleeve (7) is evenly provided with a plurality of molding holes (8).

3. The visual forming device for pencil lead preparation according to claim 2, characterized in that: The forming drive component (3) includes a drive disk (9), a drive motor (10), a drive base (11), a transmission link (12), and a forming pressure bar (13). The drive disk (9) is rotatably mounted on the support base (1), and a transmission column (14) is mounted on the drive disk (9), and the transmission column (14) is offset from the center position of the drive disk (9). The drive motor (10) is fixedly installed on the support base (1), and the output shaft of the drive motor (10) is connected to the drive disk (9) in a transmission connection. The drive seat (11) is mounted on the support base (1), and the drive seat (11) is used to convert the rotational power of the drive disk (9) into linear drive. The two ends of the transmission link (12) are rotatably connected to the transmission column (14) and the drive seat (11) respectively, and the transmission link (12) is used to transmit power. The forming pressure rod (13) is provided in multiple parts, and the multiple forming pressure rods (13) are fixedly installed on the drive seat (11). The forming pressure rod (13) is used to push the pencil lead raw material rod into the forming cavity (5) and extrude it through the extrusion forming sleeve (7).

4. The visual forming device for pencil lead preparation according to claim 3, characterized in that: The drive base (11) includes a movable guide rail (15), a connecting push rod (16), and a drive frame (17). The movable guide rail (15) is fixedly installed on the support base (1). Two movable guide rails (15) are arranged in parallel, and the two movable guide rails (15) are arranged along the length direction of the molding cavity (5). The connecting push rod (16) is slidably mounted on the moving guide rail (15), and the connecting push rod (16) is rotatably connected to the transmission connecting rod (12); The drive frame (17) is fixedly installed on the connecting push rod (16). The drive frame (17) has an installation plane (18) perpendicular to the length direction of the molding cavity (5), and the molding pressure rod (13) is fixedly installed on the installation plane (18).

5. The visual forming device for pencil lead preparation according to claim 4, characterized in that: The outer diameter of the forming pressure rod (13) is equal to the inner diameter of the forming cavity (5). Multiple hole-cleaning columns (19) are fixedly provided at the end of the forming pressure rod (13) away from the driving frame (17), and the outer diameter of the hole-cleaning column (19) matches the inner diameter of the forming hole (8). The end of the hole-cleaning column (19) away from the forming pressure rod (13) has a rounded corner structure.

6. The visual forming device for pencil lead preparation according to claim 3, characterized in that: The feeding assembly (4) includes a connecting guide bar (20), a storage hopper (21), and a traveling assembly (22). The connecting guide bar (20) is installed on the support base (1), and the connecting guide bar (20) is located between the drive seat (11) and the molding mold (2). The connecting guide bar (20) is provided with a conveying channel (23) that matches the molding cavity (5). The storage hopper (21) is located above the connecting guide bar (20), and the storage hopper (21) moves along the length direction of the connecting guide bar (20). The storage hopper (21) is used to temporarily store pencil lead raw material rods. The traveling component (22) is mounted on the support base (1) and the traveling component (22) is located on the upper part of the storage hopper (21). The traveling component (22) is used to drive the storage hopper (21) to reciprocate along the length direction of the connecting guide strip (20) and to send the pencil lead raw material rods in the storage hopper (21) into the conveying channel (23) one by one.

7. The visual forming device for pencil lead preparation according to claim 6, characterized in that: There is a conveying gap between the storage hopper (21) and the connecting guide strip (20), which is used to provide the conveying of pencil lead raw material rods. A positioning support wheel (24) is rotatably installed at the bottom of the storage hopper (21), and the positioning support wheel (24) is in contact with the upper surface of the support base (1).

8. The visual forming device for pencil lead preparation according to claim 5, characterized in that: The storage hopper (21) is provided with a maintenance door (25) on its side, and a transparent observation window (26) is provided on the maintenance door (25). The bottom of the storage hopper (21) is provided with a discharge port (27) for moving a single pencil lead rod. The discharge port (27) is provided with two rotatable positioning rollers (28) on the two side walls along the moving direction of the storage hopper (21). The positioning rollers (28) are used to guide the pencil lead rod to move into the forming cavity (5).

9. The visual forming device for pencil lead preparation according to claim 5, characterized in that: The traveling assembly (22) includes a positioning rail (29), a traveling screw (30), a drive block (31), and a traveling motor (32). The positioning rail (29) is fixedly installed on the support base (1), and the positioning rail (29) is located above the connecting guide bar (20); The travel screw (30) is rotatably mounted on the positioning rail (29); The drive block (31) is fixedly installed on the storage hopper (21), the top of the drive block (31) is slidably connected to the positioning rail (29), and the drive block (31) is threadedly connected to the travel screw (30). The travel motor (32) is fixedly installed on the side wall of the positioning rail (29), and the output shaft of the travel motor (32) is connected to the travel lead screw (30) for transmission.

10. A visual forming device for pencil lead preparation according to claim 9, characterized in that: The travel screw (30) is a reciprocating screw, and the travel motor (32) is a servo motor.

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