Pencil regeneration equipment and use method

Abstract

The invention discloses pencil regeneration equipment and a using method, and relates to the field of pencils. According to the technical scheme, the pencil regeneration equipment comprises an outer cylinder, a pressing column, a supporting base and a mandrel; the outer barrel is fixed to the support, one end of the outer barrel is detachably plugged with the supporting base, the core shaft is detachably arranged in the outer barrel, and the outer diameter of the core shaft is larger than that of a pencil lead; the pressing column is arranged outside the other end of the outer cylinder, and the pressing column is driven by a driving mechanism to enter and exit from the outer cylinder and extrudes the inner part of the outer cylinder; and the pressing column is provided with a yielding hole corresponding to the core shaft. The pencil is processed in a two-time extrusion mode, a shell with a pencil lead groove does not need to be manufactured firstly, the pencil shell is integrally formed, the integrity is better, and more convenience is achieved.

Description

Technical Field

[0001] This invention relates to the field of pencils, and in particular to a pencil recycling device and a method of using it. Background Technology

[0002] Pencils are the most commonly used drawing tool in art studios. Studio pencils include those with wooden casings and those with only lead. Pencils with wooden casings produce a lot of wood shavings during use. Pencils without wooden casings often have a paper or other insulating layer wrapped around the lead to prevent hands from getting dirty. Current solutions to this problem include a regenerable pencil sharpener and its operating method disclosed in patent document CN106945440A. This method uses thermoforming to create the pencil, first making two semi-cylindrical casings with lead grooves, then clamping the lead in the middle. However, this method is somewhat cumbersome, requiring the initial fabrication of the semi-cylindrical casings with lead grooves. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a pencil recycling device and its method of use. The pencil is processed using a two-stage extrusion process, eliminating the need for a pre-fabricated outer shell with a lead core groove. The pencil shell is integrally molded, resulting in better integrity and greater convenience.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a pencil recycling device, comprising an outer cylinder, a pressure column, a support base and a core shaft;

[0005] The outer cylinder is fixed to the bracket, one end of the outer cylinder is detachably sealed with the support base, and the mandrel is detachably installed inside the outer cylinder, the outer diameter of the mandrel being larger than the outer diameter of the lead core;

[0006] The pressure column is provided on the outside of the other end of the outer cylinder. The pressure column is driven by a driving mechanism to move in and out of the outer cylinder and to squeeze inward.

[0007] The pressure post is provided with a relief hole corresponding to the mandrel.

[0008] This process involves first mixing the scraps with adhesive, then fitting the support base and mandrel into the outer cylinder. Next, the scraps mixed with adhesive are loaded into the outer cylinder, and the scraps are compressed by a pressure column. While the scraps don't need to be extremely tight at this stage, a second compression process is performed. The mandrel is then removed, forming a rough pencil shell. The inner hole is then inserted into the lead core, and the scraps are compressed a second time by the pressure column. This time, the scraps are completely compressed in one go, reducing the inner diameter of the hole and firmly securing the lead core to form the finished pencil. Finally, the finished pencil is removed and ready for use. To improve stability, it's recommended to leave it in the outer cylinder for at least half an hour after the second compression before removing it.

[0009] Preferably, the pressure column is disposed on the output rod of the first hydraulic press, and the output rod of the first hydraulic press is coaxially disposed with the outer cylinder. This facilitates the pushing of the pressure column by the first hydraulic press.

[0010] The outer diameter of the mandrel is larger than the outer diameter of the lead core. This makes it easier to insert the lead core into the inner hole later. When the lead core is pressed again during the second pressing, the inner hole diameter becomes smaller. Since the debris has already been initially formed during the first pressing, the inner hole will more evenly shrink and squeeze the lead core inward. This avoids the lead core being squeezed inward too much on one side of the inner hole, which could cause it to break. As a result, the final product is more stable.

[0011] Preferably, the pressure column adopts a column rod structure, with the relief hole axially provided at the front end of the column rod structure, and an air pressure balance hole axially provided at the end of the relief hole. The air pressure balance hole facilitates the mandrel entering the relief hole when compacting debris.

[0012] Preferably, the support base is provided with a threaded hole that engages with one end of the mandrel, and the inner diameter of the threaded hole is larger than the outer diameter of the lead core. During secondary extrusion, when the outer shell shortens axially, the lead core can remain within the threaded hole, preventing the lead core from being axially compressed.

[0013] Preferably, the support base is equipped with a second hydraulic press, the output end of which is coaxially arranged with the outer cylinder. The second hydraulic press drives the support base to move, providing more flexible support and ultimately pushing the finished pencil out of the outer cylinder.

[0014] Preferably, during the process of the pressure column entering and exiting the outer cylinder, the other end of the mandrel is always located within the relief hole. One end of the mandrel is fixed to the support base, and the other end is adapted to the relief hole. Both ends can be guided, which can improve the coaxiality of the inner hole on the blank pencil shell.

[0015] Preferably, the outer wall of the mandrel has several grooves axially provided. Using this type of mandrel allows for the formation of an inner hole with axially raised strips, which enables better positioning of the lead core after it is inserted.

[0016] Preferably, the diameter of the end of the mandrel closer to the second hydraulic press is larger than that of the end farther from the second hydraulic press. This facilitates the removal of the mandrel from the blank pencil case using the second hydraulic press.

[0017] Preferably, the inner diameter of the outer cylinder is smaller at the end closer to the second hydraulic press than at the end farther from the second hydraulic press. This facilitates the ejection of the finished pencil from the outer cylinder by the second hydraulic press.

[0018] The steps for using a pencil recycling device are as follows:

[0019] Step 1: Mix the adhesive into the debris;

[0020] Step 2: Fit the support base and mandrel into the outer cylinder;

[0021] Step 3: Fill the outer cylinder with the debris mixed with adhesive;

[0022] Step 4: The debris inside the outer cylinder is squeezed by the pressure column to form a blank pencil shell;

[0023] Step 5: With the support base in place, the core is pulled out and separated from the blank pencil shell, leaving an inner hole in the blank pencil shell.

[0024] Step 6: Insert the lead core into the inner hole and reassemble the support base into the outer cylinder;

[0025] Step 7: Press the pressure column again to squeeze the blank pencil shell inside the outer cylinder. After the blank pencil shell is squeezed, the inner diameter of the hole becomes smaller and the lead core is pressed tightly to form the finished pencil.

[0026] Step 8: Push the finished pencil out of the outer tube using the support base.

[0027] Advantages of this invention:

[0028] This solution uses a two-stage extrusion process to process pencils. The first stage involves extruding the pencil through a core shaft to form the inner hole. Then, before the second extrusion, the lead core is inserted, and the inner diameter of the inner hole is compressed by the extrusion process. This significantly improves the yield rate of pencil processing. Common scraps can be used to process pencil shells. There is no need to make an outer shell with a lead core groove first. The pencil shell is formed in one piece, resulting in better integrity and greater convenience. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one of the drawings of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0031] Among them, 1. outer cylinder; 2. pressure column; 3. support base; 4. mandrel; 5. first hydraulic press; 6. second hydraulic press; 7. blank pencil shell; 8. relief hole; 9. screw hole. Detailed Implementation

[0032] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0033] Example

[0034] like Figure 1 As shown, a pencil recycling device includes an outer cylinder 1, a pressure column 2, a support base 3, and a core 4.

[0035] The outer cylinder 1 is fixed to the bracket, and one end of the outer cylinder 1 is detachably sealed with the support base 3. The mandrel 4 is detachably installed inside the outer cylinder 1, and the outer diameter of the mandrel 4 is larger than the outer diameter of the lead core.

[0036] The outer cylinder 1 is provided with a pressure column 2 at the other end. The pressure column 2 is driven by a driving mechanism to move in and out of the outer cylinder 1 and to compress it inward.

[0037] The pressure post 2 is provided with a relief hole 8 corresponding to the mandrel 4.

[0038] This solution is primarily for making your own pencils, especially suitable for art studios where a lot of pencils and leads are used. It utilizes the shavings generated during pencil sharpening in the studio to press a pencil shell onto the lead, preventing hands from getting dirty. It's important to emphasize that this solution is not intended to replace current pencil leads or pencils with shells, but rather to provide a DIY opportunity for studios and similar settings.

[0039] When processing this solution, the scraps need to be mixed with adhesive first. Then, the support base 3 and the mandrel 4 are fitted onto the outer cylinder 1. Next, the scraps mixed with adhesive are loaded into the outer cylinder 1, and the scraps are compressed by the pressure column 2. The scraps are compressed, but not too tightly at this stage, so there is a second compression process. Then, the mandrel 4 is removed to form a blank pencil shell 7. The inner hole is inserted into the lead core, and the scraps are compressed a second time by the pressure column 2. At this time, the scraps can be completely compressed at once, and the inner diameter of the inner hole will decrease, fixing the lead core firmly to form a finished pencil. Finally, the finished pencil is removed and ready for use. To improve stability, it can be kept in the outer cylinder 1 for at least half an hour after the second compression before being removed.

[0040] To facilitate the removal of finished pencils or the insertion of lead cores, sufficient space needs to be left at both ends of the outer cylinder 1.

[0041] The pressure column 2 is mounted on the output rod of the first hydraulic press 5, and the output rod of the first hydraulic press 5 is coaxially arranged with the outer cylinder 1. This facilitates the pushing of the pressure column 2 by the first hydraulic press 5.

[0042] The outer diameter of the mandrel 4 is larger than the outer diameter of the lead core. This makes it easier to insert the lead core into the inner hole later. When the lead core is pressed for the second time, the inner hole diameter becomes smaller and the lead core is pressed for the second time. Since the debris has already been initially formed during the first pressing, the inner hole will more evenly shrink and squeeze the lead core inward. This avoids the lead core being squeezed inward on one side of the inner hole, which could cause it to break. As a result, the final product is more stable.

[0043] The pressure column 2 adopts a column rod structure, with the relief hole 8 axially provided at the front end of the column rod structure, and an air pressure balance hole axially provided at the end of the relief hole 8. The air pressure balance hole facilitates the mandrel 4 to enter the relief hole 8 when compacting debris.

[0044] The support base 3 is provided with a threaded hole 9 that is threaded to one end of the mandrel 4. The inner diameter of the threaded hole 9 is larger than the outer diameter of the lead core. During secondary extrusion, when the outer shell shortens axially, the lead core can be placed inside the threaded hole 9, preventing the lead core from being compressed axially.

[0045] The support base 3 is equipped with a second hydraulic press 6, the output end of which is coaxially arranged with the outer cylinder 1. By driving the support base 3 to move via the second hydraulic press 6, more flexible support can be provided, and finally, the finished pencil can be pushed out of the outer cylinder 1.

[0046] During the process of the pressure column 2 entering and exiting the outer cylinder 1, the other end of the mandrel 4 is always located inside the relief hole 8. One end of the mandrel 4 is fixed to the support base 3, and the other end is adapted to the relief hole 8. Both ends can be guided, which can improve the coaxiality of the inner hole on the blank pencil shell 7.

[0047] The outer wall of the mandrel 4 has several grooves axially arranged. By using this type of mandrel 4, an inner hole with axially raised strips can be formed, which can better position the lead core after it is inserted.

[0048] The end of the mandrel 4 closest to the second hydraulic press 6 has a larger diameter than the end furthest from the second hydraulic press 6. This facilitates the removal of the mandrel 4 from the blank pencil case 7 via the second hydraulic press 6.

[0049] The inner diameter of the outer cylinder 1 is smaller at the end closer to the second hydraulic press 6 than at the end farther away from the second hydraulic press 6. This facilitates the ejection of the finished pencil from the outer cylinder 1 by the second hydraulic press 6.

[0050] The steps for using a pencil recycling device are as follows:

[0051] Step 1: Mix the adhesive into the debris;

[0052] Step 2: Fit the support base 3 and the spindle 4 into the outer cylinder 1;

[0053] Step 3: Fill the outer cylinder 1 with the debris mixed with adhesive;

[0054] Step 4: The debris inside the outer cylinder 1 is squeezed by the pressure column 2 to form a blank pencil shell 7;

[0055] Step 5: Driven by the support base 3, the spindle 4 is pulled out and separated from the blank pencil shell 7, leaving an inner hole in the blank pencil shell 7.

[0056] Step 6: Insert the lead core into the inner hole and reassemble the support base 3 into the outer cylinder 1;

[0057] Step 7: Press the pressure column 2 to press the blank pencil shell 7 inside the outer cylinder 1 again. After the blank pencil shell 7 is pressed, the inner diameter of the hole becomes smaller and the lead core is pressed tightly to form a finished pencil.

[0058] Step 8: Push the finished pencil out of the outer cylinder 1 using the support base 3.

[0059] The hydraulic press used in this solution can be a manual hydraulic press. The adhesive used is a common type of glue such as soybean glue. It should be noted that a layer of grease can be applied to the surface of the mandrel 4 and the inner surface of the outer cylinder 1 to facilitate demolding.

[0060] Advantages of this invention:

[0061] This method uses a two-stage extrusion process to process pencils. The first extrusion is performed by the core shaft 4 to form the inner hole. Then, before the second extrusion, the lead core is inserted and the inner diameter of the inner hole is compressed by the extrusion. This method can significantly improve the yield of pencil processing. Common debris can be used to process pencil shells.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pencil recycling device, characterized in that, It includes an outer cylinder (1), a pressure column (2), a support base (3), and a mandrel (4); The outer cylinder (1) is fixed to the bracket, and the support base (3) is detachably sealed at one end of the outer cylinder (1). The mandrel (4) is detachably installed inside the outer cylinder (1), and the outer diameter of the mandrel (4) is larger than the outer diameter of the lead core. The outer cylinder (1) is provided with a pressure column (2) at the other end. The pressure column (2) is driven by a driving mechanism to enter and exit the outer cylinder (1) and to squeeze inward. The pressure post (2) is provided with a relief hole (8) corresponding to the mandrel (4).

2. The pencil recycling device according to claim 1, characterized in that: The pressure column (2) is disposed on the output rod of the first hydraulic press (5), and the output rod of the first hydraulic press (5) is coaxially disposed with the outer cylinder (1).

3. The pencil recycling device according to claim 1, characterized in that: The pressure column (2) adopts a column rod structure. The front end of the column rod structure is provided with the relief hole (8) axially, and the end of the relief hole (8) is provided with an air pressure balance hole axially.

4. A pencil recycling device according to claim 1, characterized in that: The support base (3) is provided with a screw hole (9) that is threaded to one end of the spindle (4), and the inner diameter of the screw hole (9) is larger than the outer diameter of the lead core.

5. A pencil recycling device according to claim 1, characterized in that: The support base (3) is equipped with a second hydraulic press (6), and the output end of the second hydraulic press (6) is coaxially arranged with the outer cylinder (1).

6. A pencil recycling device according to claim 5, characterized in that: During the process of the pressure column (2) moving in and out of the outer cylinder (1), the other end of the mandrel (4) is always located inside the relief hole (8).

7. A pencil recycling device according to claim 6, characterized in that: The outer wall of the mandrel (4) is provided with several grooves along the axial direction.

8. A pencil recycling device according to claim 7, characterized in that: The diameter of the end of the mandrel (4) closer to the second hydraulic press (6) is larger than that of the end farther away from the second hydraulic press (6).

9. A pencil recycling device according to claim 8, characterized in that: The inner diameter of the outer cylinder (1) is smaller at the end closer to the second hydraulic press (6) than at the end farther away from the second hydraulic press (6).

10. A method of using a pencil recycling device, characterized in that: The pencil recycling device according to any one of claims 1-9 is used as follows: Step 1: Mix the adhesive into the debris; Step 2: Fit the support base (3) and the mandrel (4) into the outer cylinder (1); Step 3: Fill the outer cylinder (1) with the debris mixed with adhesive; Step 4: The debris inside the outer cylinder (1) is squeezed by the pressure column (2) to form a blank pencil shell (7); Step 5: Driven by the support base (3), the mandrel (4) is pulled out and separated from the blank pencil shell (7), leaving an inner hole in the blank pencil shell (7); Step 6: Insert the lead core into the inner hole and reassemble the support base (3) into the outer cylinder (1); Step 7: Press the pressure column (2) again to press the blank pencil shell (7) inside the outer cylinder (1). After the blank pencil shell (7) is pressed, the inner hole diameter becomes smaller and the lead core is pressed to form a finished pencil. Step 8: Push the finished pencil out of the outer tube (1) using the support base (3).

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