Automatic pencil shell forming and processing device

Abstract

The invention belongs to the technical field of pencil shell forming, particularly relates to an automatic pencil shell forming and processing device, and aims to solve the problems that when one end of an existing threaded pencil is polished, the orientation needs to be adjusted through sorting equipment, the production cost is increased, and the production efficiency is reduced. The first conveying mechanism is provided with a polishing mechanism, a pencil containing groove used for containing pencils is formed in the polishing mechanism, an internal thread groove is formed in the pencil containing groove, the directions of threads at the two ends of the internal thread groove are opposite, and the internal thread groove is matched with the external thread ends of the pencils. The end without the external threads can be polished without adjusting the orientation of the pencil, only the end without the external threads of the pencil can be polished without arranging sorting equipment, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pencil shell molding, in particular to an automatic pencil shell molding and processing device. Background Art

[0002] Pencils are a kind of stationery products that are made through multiple processes. The production of pencils is generally divided into molding, offset printing and assembly processes. Pencils are assembled with the core in the middle after cutting wood. After assembly, they need to be painted. However, there are still many burrs on the pencils after cutting. Since the side of the pencil is cut along the grain of the wood, there are fewer burrs and it is easy to remove. However, the end face of the pencil has more burrs because it is staggered with the grain of the wood. Therefore, the burrs need to be removed before the pencil is transported to the painting process to ensure the overall beauty of the pencil.

[0003] Compared with ordinary pencils, the technical problems that need to be solved during the grinding process of special-shaped pencils are different from those of traditional pencils. Specifically, for a pencil with an external thread at one end, only the cross-section and edge of the end without the external thread need to be ground, while the end with the external thread does not need to be ground, so as to avoid the grinding action causing the external thread to lose its screw connection effect. Improving the existing picking equipment and feeding equipment to adjust the direction of the pencil requires a lot of investment in research and development on the one hand, and on the other hand, corresponding automatic picking equipment needs to be added, which will lead to a decrease in output and a significant increase in production costs. Summary of the invention

[0004] The invention provides an automatic pencil shell forming and processing device, which solves the problem in the prior art that, for a pencil with an external thread at one end, only the end without the external thread needs to be polished, while the end with the external thread does not need to be polished. The existing picking equipment and feeding equipment are improved so that the orientation of the pencil can be adjusted. On the one hand, a large amount of money needs to be invested in research and development, and on the other hand, corresponding automatic picking equipment needs to be added, which will lead to a decrease in output and a large increase in production costs.

[0005] The present invention provides the following technical solutions:

[0006] The invention discloses an automatic pencil shell forming and processing device, comprising a first transmission mechanism, wherein the first transmission mechanism is provided with a grinding mechanism, wherein a pencil receiving groove for accommodating pencils is provided on the grinding mechanism, wherein an internal thread groove is provided in the pencil receiving groove, wherein threads at two ends of the internal thread groove face opposite directions, and the internal thread groove is adapted to the external thread end of the pencil, and a grinding head adapted to the end of the pencil is fixedly installed at both ends of each pencil receiving groove, wherein the pencil receiving groove and the matched grinding head are on the same axis, and wherein a driving device for driving the pencil to rotate is installed above the first transmission mechanism, wherein the pencil receiving groove is provided for accommodating the pencil, and an internal thread groove is provided in the pencil receiving groove, wherein the external thread end of the pencil can match the internal thread groove, and the pencil is driven to rotate by the driving device, wherein the internal thread groove is matched to make the pencil move axially during the rotation of the pencil, so that the end of the pencil without the external thread is extended into the grinding head for grinding, and no additional picking equipment is required to unify the pencil direction, and one end of the pencil can be ground and polished, thereby significantly improving production efficiency and reducing production cost.

[0007] As a further improvement of the above scheme.

[0008] Preferably, the grinding head is a cylindrical grinding sleeve, comprising a grinding base for grinding the end face of the pencil, and a grinding peripheral wall for grinding the edge of the end of the pencil, and the center of the grinding base is located on the central axis of the pencil, and the grinding sleeve can be elastically retracted in the axial direction. By arranging the grinding sleeve coaxial with the pencil, the edge and end face of the pencil can be polished after the pencil is extended into the grinding sleeve, and by arranging the axial elastic retractable mechanism, it can be ensured that the end face and the end edge of the pencil can be continuously polished during the extension process.

[0009] Preferably, the driving device is an elongated mounting frame, the front end of the mounting frame is formed into a parabolic shape that is conducive to feeding, and a friction strip is installed at the lower part of the mounting frame. The first transmission mechanism moves to drive the pencil and the friction strip to move relative to each other, and the friction strip drives the pencil to rotate in the opposite direction. The external thread end of the pencil cooperates with the internal thread groove to drive the pencil to move toward the internal thread end. The friction strip is provided so that the conveyed pencil can come into contact with the friction strip, and the friction strip drives the pencil to rotate on its own. The power for the pencil's rotation is provided by the relative displacement of the first transmission mechanism and the friction strip. The structure is simple and the stability is high. Without the need for additional power, the end of the pencil without the external thread can be automatically polished.

[0010] Preferably, an arc-shaped smooth support plate is installed in the middle of the pencil accommodating groove, the arc-shaped smooth support plate is adapted to the size of the pencil, the external thread end cooperates with the internal thread groove, the pen holder of the pencil is supported on the arc-shaped smooth support plate, and the axis of the pencil is in a horizontal state. The arc-shaped smooth support plate is provided to improve the smoothness of the pencil's rotation, and can play a limiting role for the pencil. At the same time, the axis of the pencil can be kept in a horizontal state, thereby preventing the pencil from affecting the end edge during the rotation process.

[0011] Preferably, the grinding head includes a bottom plate, which is fixedly connected to the side of the transmission belt body of the first transmission mechanism, and the end of the bottom plate is bent upward to form a vertical bending plate, a through hole is formed on the vertical bending plate, and a connecting rod is passed through the through hole, and a middle grinding plate is fixed to one side of the connecting rod facing the transmission belt body, and an end pressure plate is fixed to the other side, and the bottom plate is slidably connected to the grinding plates on both sides, and a first elastic member and a second elastic member are installed between the grinding plates on both sides, and the end pressure plate cooperates with the first elastic member to apply an inward force to the grinding plates on both sides, and the second elastic member applies an outward force to the grinding plates on both sides, so that during the rotation of the pencil, the contact and extrusion degree between the pencil and the middle grinding plate gradually increases, which will also drive the contact and extrusion degree between the grinding plates on both sides and the pencil to increase, thereby improving the grinding effect.

[0012] Preferably, the first elastic member is an elastic band, the second elastic member is a return spring, a sleeve rod is fixed to one end of the grinding plates on both sides, an elastic band is sleeved on the sleeve rod, an end locking head is installed on the top of the sleeve rod, and the inner sides of the grinding plates on both sides are respectively fixedly connected to the two ends of the return spring, so that when the pencil is pressed against the middle grinding plate, the grinding plates on both sides will be driven to move closer to the middle, so that the end face of the pencil and the edge of the end of the pencil can be polished at the same time.

[0013] Preferably, a middle polishing layer is fixed on the middle polishing plate, and the middle polishing layer is used to polish the end face of the pencil. Two side polishing layers are fixed on the inner sides of the two side polishing plates, and the two side polishing layers are used to polish the end edges of the pencil. The pencil is polished by the polishing layers. The middle polishing layer and the two side polishing layers can be replaced after being worn, so as to maintain the polishing effect and reduce the production cost at the same time.

[0014] Preferably, the driving device is a second transmission mechanism and a third transmission mechanism, wherein the second transmission mechanism is arranged at the upper part of the starting section of the first transmission mechanism, and the third transmission mechanism is arranged at the upper part of the last section of the first transmission mechanism, the transmission direction of the second transmission mechanism is opposite to that of the first transmission mechanism, the second transmission mechanism drives the pencil to rotate in the opposite direction in the pencil accommodating groove, the pencil moves toward one end of the internal thread end, and the internal thread end extends into the grinding head for grinding, the third transmission mechanism has the same rotation direction as the first transmission mechanism, and the rotation speed of the third transmission mechanism is greater than the rotation speed of the first transmission mechanism, the third transmission mechanism drives the pencil to rotate forward, and the pencil retracts into the pencil accommodating groove, by setting the second transmission mechanism, the lateral movement distance of the end without external thread of the pencil after self-rotation can be controlled, thereby controlling the axial movement distance of the pencil, and the third transmission mechanism can be set to reset the pencil, and after resetting, the pencil will not be restricted by the grinding head, so that it can be unloaded smoothly by gravity, providing convenience for subsequent processes.

[0015] Preferably, the driving device is installed on a bracket, a guide rod is installed on the top of the driving device, a guide hole is opened on the bracket, the guide rod cooperates with the guide hole to guide the driving device to move vertically, a bearing chamber is installed on the top of the driving device, the bearing chamber is rotatably connected to the driving screw, the driving screw is connected to the threaded sleeve on the bracket through threads, the driving screw is fixedly connected to the output shaft of the driving motor, and the driving motor is installed on the bracket, which can control the height of the driving device, facilitate disassembly and assembly, and improve applicability.

[0016] A slide groove is provided on the bottom plate, and a slider is fixed at the lower part of the grinding plates on both sides. The slider is slidably connected with the slide groove, so that the grinding plates on both sides can move toward the middle at the same time under the action of the middle grinding plate, thereby grinding the side edge of the pencil end.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0018] In the present invention, a pencil receiving groove is provided for receiving the pencil, and an internal thread groove is provided in the pencil receiving groove, so that the external thread end of the pencil can cooperate with the internal thread groove, and the pencil is driven to rotate by a driving device. During the rotation of the pencil, the internal thread groove is cooperated to make the pencil move axially, so that the end of the pencil without the external thread is extended into the grinding head for grinding, and one end of the pencil can be ground and polished without adding a picking device to unify the direction of the pencil, thereby significantly improving the production efficiency and reducing the production cost.

[0019] In the present invention, a grinding sleeve coaxial with the pencil is provided so that the pencil edge and end face can be ground after the pencil is inserted into the grinding sleeve. An axial elastic telescopic mechanism is provided so that the end face and end edge of the pencil can be continuously ground during the extension process.

[0020] In the present invention, a friction strip is provided so that the conveyed pencil can come into contact with the friction strip, and the friction strip drives the pencil to rotate. The power for the pencil to rotate is provided by the relative displacement between the first transmission mechanism and the friction strip. The structure is simple and the stability is high. The end of the pencil without external thread can be automatically polished without the need for additional power.

[0021] In the present invention, the smoothness of the pencil's rotation is improved by arranging an arc-shaped smooth supporting plate, and a limiting effect can be exerted on the pencil. At the same time, the axis of the pencil can be kept in a horizontal state, thereby preventing the pencil from affecting the end edge during the rotation process.

[0022] In the present invention, during the self-rotation of the pencil, the contact and extrusion degree between the pencil and the middle grinding plate gradually increases, which also drives the contact and extrusion degree between the grinding plates on both sides and the pencil to increase, thereby improving the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of a pencil in an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the cross-sectional structure of a pencil in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of an automated pencil shell forming and processing device in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of a pencil receiving slot and a grinding head of an automated pencil shell forming and processing device according to an embodiment of the present invention;

[0027] Figure 5 The second structural schematic diagram of the pencil receiving slot and the grinding head of the automatic pencil shell forming and processing device in the embodiment of the present invention;

[0028] Figure 6 The third structural schematic diagram of the pencil receiving slot and the grinding head of the automatic pencil shell forming and processing device in the embodiment of the present invention;

[0029] Figure 7 One of the three-dimensional structural diagrams of the grinding head of the automatic pencil shell forming and processing device in the embodiment of the present invention;

[0030] Figure 8This is the second three-dimensional structural diagram of the grinding head of the automatic pencil shell forming and processing device in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1. Eraser sleeve; 2. Pen barrel; 3. External thread end; 4. Internal thread end; 5. First transmission mechanism; 6. Second transmission mechanism; 7. Third transmission mechanism; 8. Grinding mechanism; 801. Pencil receiving groove; 802. Internal thread groove; 803. Arc-shaped smooth supporting plate; 9. Grinding head; 901. Grinding plates on both sides; 902. Middle grinding layer; 903. Middle grinding plate; 904. Grinding layers on both sides; 905. Elastic band; 906. Sleeve rod; 907. End locking head; 908. Return spring; 909. Slide groove; 910. Sliding block; 911. Bottom plate; 912. Vertical bending plate; 913. End pressure plate; 914. Connecting rod. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0035] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0036] In the embodiments of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] refer to Figure 1-Figure 2 A pencil that can be connected end to end. When the pencil barrel 2 is used to a shorter size, it is not easy to hold. Therefore, an external thread end 3 is provided at one end of the pencil and an internal thread end 4 is provided at the other end. The internal thread end 4 can be connected to the external thread end 3 by thread connection, so that the pencil that has been used to the end can be used without the need for other connection structures. The external thread end 3 is protected by an eraser cover 1 before being connected.

[0038] refer to Figure 3-Figure 8 :

[0039] Embodiment 1, an automated pencil shell forming and processing device, comprises a first transmission mechanism 5, the first transmission mechanism 5 is equipped with a grinding mechanism 8, a pencil receiving groove 801 for accommodating a pencil is provided on the grinding mechanism 8, an internal thread groove 802 is provided in the pencil receiving groove 801, the threads at both ends of the internal thread groove 802 face opposite directions, an arc-shaped smooth supporting plate 803 is installed in the middle of the pencil receiving groove 801, the arc-shaped smooth supporting plate 803 is adapted to the size of the pencil, the external thread end 3 is matched with the internal thread groove 802, the pen body 2 of the pencil is supported on the arc-shaped smooth supporting plate 803, and the axis of the pencil is in a horizontal state, the internal thread groove 802 is matched with the external thread end 3 of the pencil, and grinding heads 9 matched with the end of the pencil are fixedly installed at both ends of each pencil receiving groove 801, the pencil receiving groove 801 and the matched grinding head 9 are on the same axis, and a driving device for driving the pencil to rotate is installed above the first transmission mechanism 5.

[0040] In embodiment 2, the grinding head 9 is a cylindrical grinding sleeve, including a grinding base for grinding the end face of the pencil, and a grinding peripheral wall for grinding the edge of the end of the pencil, and the center of the grinding base is located on the central axis of the pencil, and the grinding sleeve can be elastically retracted in the axial direction.

[0041] Embodiment 3, the grinding head 9 includes a bottom plate 911, the bottom plate 911 is fixedly connected to the side of the transmission belt body of the first transmission mechanism 5, the end of the bottom plate 911 is bent upward to form a vertical bending plate 912, the vertical bending plate 912 is provided with a through hole, a connecting rod 914 is passed through the through hole, the connecting rod 914 is fixed with a middle grinding plate 903 on one side of the transmission belt body, and an end pressure plate 913 is fixed on the other side, the bottom plate 911 is slidably connected with the grinding plates 901 on both sides, a first elastic member and a second elastic member are installed between the grinding plates 901 on both sides, the end pressure plate 913 cooperates with the first elastic member to apply an inward force to the grinding plates 901 on both sides, and the second elastic member The components exert an outward force on the grinding plates 901 on both sides, the first elastic component is an elastic belt 905, the second elastic component is a reset spring 908, a sleeve rod 906 is fixed at one end of the grinding plates 901 on both sides, the sleeve rod 906 is sleeved with an elastic belt 905, and an end locking head 907 is installed on the top of the sleeve rod 906, the inner sides of the grinding plates 901 on both sides are respectively fixedly connected to the two ends of the reset spring 908, a middle grinding layer 902 is fixed on the middle grinding plate 903, and the middle grinding layer 902 is used for grinding the end face of the pencil, and the inner sides of the grinding plates 901 on both sides are fixed with grinding layers 904 on both sides, and the grinding layers 904 on both sides are used for grinding the end edges of the pencil.

[0042] In embodiment 4, the driving device is a long strip mounting frame, the front end of the mounting frame is formed into a parabolic shape that is conducive to feeding, and a friction strip is installed at the lower part of the mounting frame. The first transmission mechanism 5 moves to drive the pencil and the friction strip to move relative to each other, and the friction strip drives the pencil to rotate in the opposite direction. The external thread end 3 of the pencil cooperates with the internal thread groove 802 to drive the pencil to move toward the internal thread end 4.

[0043] Embodiment 5, the driving device is installed on the bracket, a guide rod is installed on the top of the driving device, a guide hole is opened on the bracket, the guide rod cooperates with the guide hole to guide the driving device to move vertically, a bearing chamber is installed on the top of the driving device, the bearing chamber is rotatably connected with the driving screw, the driving screw is connected to the threaded sleeve on the bracket by a thread, the driving screw is fixedly connected to the output shaft of the driving motor, the driving motor is installed on the bracket, the driving device is a second transmission mechanism 6 and a third transmission mechanism 7, wherein the second transmission mechanism 6 is arranged at the upper part of the starting section of the first transmission mechanism 5, the third transmission mechanism 7 is arranged at the upper part of the last section of the first transmission mechanism 5, and the transmission method of the second transmission mechanism 6 The second transmission mechanism 6 drives the pencil to rotate in the opposite direction in the pencil receiving groove 801 in a direction opposite to the transmission direction of the first transmission mechanism 5. The pencil moves toward one end of the internal thread end 4, and the internal thread end 4 extends into the grinding head 9 for grinding. The third transmission mechanism 7 has the same rotation direction as the first transmission mechanism 5, and the rotation speed of the third transmission mechanism 7 is greater than the rotation speed of the first transmission mechanism 5. The third transmission mechanism 7 drives the pencil to rotate in the forward direction, and the pencil retracts into the pencil receiving groove 801. A slide groove 909 is provided on the bottom plate 911. A slider 910 is fixed to the lower part of the grinding plates 901 on both sides, and the slider 910 is slidably connected to the slide groove 909.

[0044] The working principle of this application is:

[0045] A pencil receiving groove 801 is provided on the conveyor belt of the first conveying mechanism 5 for receiving pencils. After the pencils are loaded by the loading mechanism, each pencil receiving groove 801 receives one pencil, and the orientation of the pencils does not need to be adjusted. No matter how the pencils are placed, the external thread end 3 of the pencil will cooperate with the internal thread groove 802 of the pencil receiving groove 801.

[0046] The driving device drives the pencil to rotate in the pencil receiving groove 801 in the reverse direction. During the reverse rotation of the pencil, the external thread of the pencil cooperates with the internal thread of the pencil receiving groove 801 to generate a lateral force, so that the end of the pencil with the internal thread moves out of the conveyor belt of the first conveying mechanism 5. Grinding heads 9 are provided on both sides of the conveyor belt of the first conveying mechanism 5. When the end of the pencil to be polished is inserted into the grinding head 9, the end face and edge of the pencil can be polished as the pencil rotates.

[0047] There is no need to set up picking equipment to adjust the uniform orientation of the pencils, so the polishing and grinding operation on the end of the pencil without external threads can be completed, which reduces production costs and increases output.

[0048] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention; the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Automatic pencil shell forming and processing device, characterized in that: The utility model comprises a first transmission mechanism, wherein the first transmission mechanism is provided with a grinding mechanism, wherein a pencil receiving groove for receiving a pencil is provided on the grinding mechanism, wherein an internal thread groove is provided in the pencil receiving groove, wherein threads at two ends of the internal thread groove face opposite directions, and the internal thread groove is adapted to the external thread end of the pencil, and a grinding head adapted to the end of the pencil is fixedly installed at both ends of each pencil receiving groove, wherein the pencil receiving groove and the matched grinding head are on the same axis, and a driving device for driving the pencil to rotate is installed above the first transmission mechanism.

2. The automatic pencil shell forming and processing device according to claim 1, characterized in that: The grinding head is a cylindrical grinding sleeve, comprising a grinding base for grinding the end face of a pencil and a grinding peripheral wall for grinding the edge of the end of the pencil. The center of the grinding base is located on the central axis of the pencil, and the grinding sleeve can be elastically retracted in the axial direction.

3. The automatic pencil shell forming and processing device according to claim 1, characterized in that: The automatic pencil shell forming and processing device is characterized in that the driving device is a long strip mounting frame, the front end of the mounting frame is formed into a parabolic shape that is conducive to feeding, a friction strip is installed at the lower part of the mounting frame, the first transmission mechanism moves to drive the pencil and the friction strip to move relative to each other, the friction strip drives the pencil to rotate in the opposite direction, and the external thread end of the pencil cooperates with the internal thread groove to drive the pencil to move toward the internal thread end.

4. The automatic pencil shell forming and processing device according to claim 1, characterized in that: An arc-shaped smooth support plate is installed in the middle of the pencil accommodating groove, the arc-shaped smooth support plate is adapted to the size of the pencil, the external thread end cooperates with the internal thread groove, the pen holder of the pencil is supported on the arc-shaped smooth support plate, and the axis of the pencil is in a horizontal state.

5. The automatic pencil shell forming and processing device according to claim 4, characterized in that: The grinding head includes a base plate, which is fixedly connected to the side of the transmission belt body of the first transmission mechanism, and a vertical bending plate is bent upward at the end of the base plate, a through hole is opened on the vertical bending plate, and a connecting rod is passed through the through hole, and a middle grinding plate is fixed on one side of the connecting rod facing the transmission belt body, and an end pressure plate is fixed on the other side, and two side grinding plates are slidably connected to the base plate, and a first elastic member and a second elastic member are installed between the two side grinding plates, and the end pressure plate cooperates with the first elastic member to apply an inward force to the two side grinding plates, and the second elastic member applies an outward force to the two side grinding plates.

6. The automatic pencil shell forming and processing device according to claim 5, characterized in that: The first elastic member is an elastic band, the second elastic member is a reset spring, a sleeve rod is fixed at one end of the grinding plates on both sides, an elastic band is sleeved on the sleeve rod, an end locking head is installed on the top of the sleeve rod, and the inner sides of the grinding plates on both sides are fixedly connected to the two ends of the reset spring respectively.

7. The automatic pencil shell forming and processing device according to claim 6, characterized in that: A middle polishing layer is fixed on the middle polishing plate, and the middle polishing layer is used for polishing the end face of the pencil. Two side polishing layers are fixed on the inner sides of the two side polishing plates, and the two side polishing layers are used for polishing the end edges of the pencil.

8. The automatic pencil shell forming and processing device according to claim 1, characterized in that: The driving device comprises a second transmission mechanism and a third transmission mechanism, wherein the second transmission mechanism is arranged at the upper part of the starting section of the first transmission mechanism, and the third transmission mechanism is arranged at the upper part of the last section of the first transmission mechanism. The transmission direction of the second transmission mechanism is opposite to that of the first transmission mechanism. The second transmission mechanism drives the pencil to rotate in the opposite direction in the pencil receiving groove, and the pencil moves toward one end of the internal thread end, and the internal thread end extends into the grinding head for grinding. The third transmission mechanism has the same rotation direction as the first transmission mechanism, and the rotation speed of the third transmission mechanism is greater than the rotation speed of the first transmission mechanism. The third transmission mechanism drives the pencil to rotate in the forward direction, and the pencil retracts into the pencil receiving groove.

9. The automatic pencil shell forming and processing device according to claim 1, characterized in that: The driving device is installed on the bracket, a guide rod is installed on the top of the driving device, a guide hole is opened on the bracket, the guide rod cooperates with the guide hole to guide the driving device to move vertically, a bearing chamber is installed on the top of the driving device, the bearing chamber is rotatably connected to the driving screw, the driving screw is threadedly connected to the threaded sleeve on the bracket, the driving screw is fixedly connected to the output shaft of the driving motor, and the driving motor is installed on the bracket.

10. The automatic pencil shell forming and processing device according to claim 1, characterized in that: A slide groove is provided on the bottom plate, and sliding blocks are fixed at the lower parts of the grinding plates on both sides, and the sliding blocks are slidably connected with the slide groove.

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