Pencil with dual-purpose refill and processing technology of pencil

Abstract

The invention discloses a pencil with a dual-purpose refill and a processing technology of the pencil. The processing technology comprises the steps of (1) processing a pencil holder, (2) preparing the pencil refill and an eraser core, (3) embedding the pencil refill and the eraser core into the pencil holder, and (4) arranging a coating on the outer side wall of the pencil holder. According to the pencil with the dual-purpose pencil core and the processing technology of the pencil, the pencil core mounting groove and the eraser core mounting groove are formed in the first half rod and the second half rod, the pencil core and the eraser core which correspond to each other in size are embedded into the grooves, processing of the pencil is completed, the pencil core mounting groove and the eraser core mounting groove are communicated, and the pencil core mounting groove and the eraser core mounting groove are matched with each other. The pencil core and the eraser core make contact with each other, so that the structure is more stable, when the pencil core installation groove and the eraser core installation groove are the same in diameter, machining of the pencil core installation groove and the eraser core installation groove is completed in a one-time grooving mode, and when the pencil core installation groove and the eraser core installation groove are different in diameter, the installation groove with the larger diameter is machined preferentially. Machining errors can be effectively reduced, and machining precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pencil, in particular to a pencil with dual-purpose lead and its processing technology. BACKGROUND

[0002] Pencil is a kind of pen used for writing and sketching, according to the shape, pencil types include raw wood pencil shaft, sharpened pencil shaft and capped pencil, among which the raw wood pencil shaft is to press the pencil lead with a wooden shaft, and this kind of pencil needs to be used after the pencil tip is sharpened; in addition, a small rubber is arranged at the end of the raw wood pencil shaft, and when writing errors occur, the pencil can be reversed to erase the errors with the rubber at the end, which is more convenient to use.

[0003] However, the above-mentioned pencil has many problems, such as: in order to ensure the stability of the pencil structure, the rubber arranged at the end is small, and the number of uses is limited, and there is a situation that the rubber is used up before the pencil is used up. Moreover, the rubber is arranged as a component on the pencil shaft, which is easy to be detached, and the small parts detached are easy to be mistaken as food by users with small age, which has a great safety hazard.

[0004] As shown in the patent with publication number CN201272160Y, a rubber lead pencil is proposed, which includes a cylindrical pencil body, and a rubber lead pencil is arranged in the center of the pencil body. Such rubber lead pencil can only be used to erase writing traces, and has a single function. SUMMARY

[0005] The purpose of the present application is to construct a pencil with dual-purpose lead based on the demand for stable arrangement of rubber in the pencil shaft and increase the number of uses of rubber based on the existing pencil, and to propose a processing technology for the pencil with dual-purpose lead based on the pencil.

[0006] A processing technology for a pencil with dual-purpose lead, characterized in that it comprises (1) pencil shaft processing; (2) preparation of pencil lead and rubber lead; (3) embedding the pencil lead and the rubber lead into the pencil shaft; (4) arranging a coating on the outer wall of the pencil shaft; Step (1) comprises the following steps: a. The pencil shaft is composed of a first half shaft and a second half shaft which are symmetrical about the center axis, and two pieces of wood are processed into the first half shaft and the second half shaft, respectively; b. machining pencil lead installation slot and rubber lead installation slot on the first half pencil lead and the second half pencil lead, the shape and size of the pencil lead installation slot on the first half pencil lead and the second half pencil lead correspond to half pencil lead (half pencil lead means that the pencil lead is cut along the center line), the shape and size of the rubber lead installation slot correspond to half rubber lead (half rubber lead means that the rubber lead is cut along the center line); Step (2) includes the following steps: a. the pencil lead is extruded by an extruder and its length is cut according to the length of the pencil lead installation slot; b. according to the open mold of the combined rubber lead installation slot, the rubber lead is injection molded by the mold, and the molded rubber lead is trimmed and polished; Step (3) includes the following steps: a. the pencil lead and the rubber lead are respectively embedded into the pencil lead installation slot and the rubber lead installation slot of the first pencil lead, and the second half pencil lead is combined with the first half pencil lead to form a pencil lead, so that the pencil lead and the rubber lead are fixedly installed between the first half pencil lead and the second half pencil lead; Step (4) includes the following steps: a. the pencil lead and the rubber lead are respectively embedded into the pencil lead installation slot and the rubber lead installation slot of the first pencil lead, and the second half pencil lead is combined with the first half pencil lead to form a pencil lead, so that the pencil lead and the rubber lead are fixedly installed between the first half pencil lead and the second half pencil lead;

[0007] Further, the pencil lead installation slot and the rubber lead installation slot are communicated, and the pencil lead and the rubber lead are connected. When machining, the two slots are communicated, the machining tolerance is large, and the machining difficulty is reduced. When using, the force on one end is borne by the pencil lead and the rubber lead, and the sum of the friction forces of the pencil lead and the rubber lead is necessarily greater than the single friction force of one of them, so that the structure of the pencil with dual-purpose lead is more stable.

[0008] Further, the diameter of the pencil lead installation slot is consistent with that of the rubber lead installation slot. When machining, the pencil lead installation slot and the rubber lead installation slot can be machined by one-time slotting, which reduces the step of two-time slotting, not only simplifies the machining steps, but also ensures that the pencil lead installation slot and the rubber lead installation slot are on the same center axis, so that the matching precision is improved.

[0009] Further, the diameter of the pencil lead installation slot is different from that of the eraser installation slot, the diameter of the pencil lead installation slot is smaller than that of the eraser installation slot, and the eraser installation slot is processed first and then the pencil lead installation slot. Since the slotting cannot be consistent with the preset size, the pencil lead installation slot with a larger diameter is processed first and then the pencil lead installation slot with a smaller diameter, only the slotting feed amount of the eraser installation slot needs to be determined, one processing variable is reduced, and the cooperation precision between the pencil lead, the eraser and the pencil shaft is further improved.

[0010] Further, the cross-sectional diameter ratio of the pencil lead installation slot to the eraser installation slot is 1:2.

[0011] Further, the boundary line is located at the joint of the pencil lead and the eraser, which is used to distinguish the pencil lead area and the eraser area of the pencil.

[0012] Further, the pencil with dual-purpose pencil lead processed by the above processing process comprises a pencil shaft, a pencil lead and an eraser, the pencil shaft is provided with a cavity along the central axis direction, the pencil lead and the eraser are fixedly arranged in the cavity, the pencil lead and the eraser are arranged along the central axis direction of the pencil shaft, and the central axis of the pencil lead coincides with that of the eraser. The pencil lead comprises a writing end and a first connecting end, the eraser comprises an erasing end and a second connecting end, the first connecting end is jointed with the second connecting end, and the writing end and the erasing end are opposite to each other. The close joint structure makes the pencil structure more compact and stable.

[0013] The pencil shaft is composed of a first half shaft and a second half shaft which are spliced and bonded, the first half shaft and the second half shaft are symmetrical about the central axis, the first half shaft and the second half shaft are provided with a pencil lead installation slot and an eraser installation slot, the pencil lead installation slots on the first half shaft and the second half shaft are spliced to form a cavity for installing the pencil lead, and the eraser installation slots on the first half shaft and the second half shaft are spliced to form a cavity for installing the eraser.

[0014] Further, the outer side wall of the pencil shaft is provided with a coating, the coating is provided with two parts and is located at the pencil lead side and the eraser side respectively, the two parts of the coating are jointed and have a clear boundary line at the joint, and the boundary line is located at the joint of the pencil lead and the eraser. The coating on the outer side wall of the pencil shaft not only can strengthen the connection strength of the first half shaft and the second half shaft, but also can clearly distinguish the pencil lead area and the eraser area.

[0015] Different users have different habits of using eraser, some users make more mistakes in writing, so they need more eraser, and some users make less mistakes in writing, so they need less eraser. In addition, some users may discard the remaining pencil because the pencil core or eraser core is consumed.

[0016] According to the use habits of different users, the length ratio of the pencil core and the eraser core is adjusted to make the consumption speed of the pencil core and the eraser core synchronous (the consumption speed synchronous means that the percentage of the pencil core and the eraser core consumed in the use process is close, for example, if the pencil core consumes 40% of the whole pencil core, the eraser core also consumes about 40% of the whole eraser core). While ensuring the function of the pencil with dual-purpose core during use, the waste of the pencil is also reduced.

[0017] Further, the length ratio of the pencil core and the eraser core is 1:1.

[0018] Optionally, the length ratio of the pencil core and the eraser core is 4:1 or 1:4.

[0019] Optionally, the length ratio of the pencil core and the eraser core is 7:3 or 3:7.

[0020] Different users have different habits of using eraser, some users use too much force when erasing the handwriting, so they need a more solid eraser, so the diameter of the eraser core needs to be set larger; some users use less force when erasing the handwriting, so compared with the users who use too much force, the diameter of the eraser core does not need to be increased.

[0021] Further, the diameter of the pencil core is the same as the diameter of the eraser core.

[0022] Optionally, the diameter of the eraser core is twice the diameter of the pencil core.

[0023] Further, the cross section of the pen barrel is provided with a plurality of different shapes, including circular, triangular, hexagonal, etc.

[0024] The processing technology of the pencil with dual-purpose leads disclosed by the application can embed the pencil lead and the rubber lead of corresponding sizes into the pencil lead mounting groove and the rubber lead mounting groove on the first half rod and the second half rod, and complete the processing of the pencil with dual-purpose leads, and the pencil lead mounting groove and the rubber lead mounting groove are communicated with each other, and the pencil lead and the rubber lead are in contact with each other, so that the structure of the pencil is more stable, when the diameters of the pencil lead mounting groove and the rubber lead mounting groove are the same, the one-time grooving mode is selected to complete the processing of the pencil lead mounting groove and the rubber lead mounting groove, when the diameters of the pencil lead mounting groove and the rubber lead mounting groove are different, the mounting groove with the larger diameter is processed preferentially, so that the processing error can be effectively reduced and the processing precision is improved.

[0025] The pencil lead and the rubber lead are embedded in one pencil rod, so that one pencil realizes the writing and erasing functions, and the embedded rubber lead has a stable structure, which greatly reduces the safety risk of young children when using the pencil compared with the traditional external rubber, the setting length ratio of the pencil lead and the rubber lead is adjusted and the diameters of the pencil lead and the rubber lead are adjusted according to the user's pencil using habit, so as to meet the pencil using needs of different users, and the coating on the outer wall of the pencil rod obviously distinguishes the pencil lead area and the rubber lead area, which not only reminds the user of the use progress of the pencil lead and the rubber lead, but also obviously distinguishes the pencils with different setting length ratios of the pencil lead and the rubber lead.

[0026] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings; Figure 1 is the overall structure schematic diagram of the triangular rod type pencil with dual-purpose leads processed by the application; Figure 2 is the overall structure schematic diagram of the round rod type pencil with dual-purpose leads processed by the application; Figure 3 is the overall structure schematic diagram of the hexagonal rod type pencil with dual-purpose leads processed by the application; Figure 4 is the cross-sectional structure schematic diagram of the pencil with dual-purpose leads in which the lengths of the pencil lead and the rubber lead are set as 1:1. Figure 5 is the overall structure schematic diagram of the pencil with dual-purpose pencil core processed by the present application, the pencil core and the eraser core length are set as 4:1; Figure 6 is the cross-sectional structure schematic diagram of the pencil with dual-purpose pencil core processed by the present application, the pencil core and the eraser core length are set as 4:1; Figure 7 is the overall structure schematic diagram of the pencil with dual-purpose pencil core processed by the present application, the pencil core and the eraser core length are set as 7:3; Figure 8 is the cross-sectional structure schematic diagram of the pencil with dual-purpose pencil core processed by the present application, the pencil core and the eraser core length are set as 7:3; Figure 9 is the cross-sectional structure schematic diagram of the pencil with dual-purpose pencil core processed by the present application, the pencil core and the eraser core diameter are set as 1:2. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clear and explicit, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0029] The pencil with dual-purpose pencil core and the processing technology thereof of the present application are further described in combination with the drawings.

[0030] Example 1, as shown in Figure 1 and Figure 4 The triangular rod type pencil with dual-purpose pencil core includes a pencil rod 104, a pencil core 103 and an eraser core 105. The cross section of the pencil rod 104 is triangular. A coating layer is arranged on the outer side wall of the pencil rod 104, which is composed of a pencil part coating layer 101 and an eraser part coating layer 102. There is a clear boundary line at the joint of the pencil part coating layer 101 and the eraser part coating layer 102, and the position of the boundary line corresponds to the joint position of the pencil core 103 and the eraser core 105.

[0031] The pencil rod 104 is composed of a first half rod and a second half rod which are spliced and bonded. The first half rod and the second half rod are symmetrical about the central axis. The first half rod and the second half rod are both provided with a pencil core mounting groove and an eraser core mounting groove. The pencil core mounting grooves on the first half rod and the second half rod are spliced to form a cavity for mounting the pencil core. The eraser core mounting grooves on the first half rod and the second half rod are spliced to form a cavity for mounting the eraser core.

[0032] The cavity for mounting the pencil core and the cavity for mounting the eraser core are connected. The pencil core 103 is fixedly embedded in the cavity for mounting the pencil core. The eraser core 105 is fixedly embedded in the cavity for mounting the eraser core.

[0033] The writing end of the pencil core 103 is outward, the erasing end of the eraser core 105 is outward, and the first connecting end of the pencil core 103 and the second connecting end of the eraser core 105 are connected.

[0034] The pencil core 103 and the eraser core 105 are arranged along the central axis of the pencil barrel 104, as shown in the figure. Figure 4 The left side is the pencil core 103, and the right side is the eraser core 105. The setting length ratio of the pencil core 103 and the eraser core 105 is 1:1.

[0035] In particular, Figure 4 The setting positions of the middle pencil core 103 and the eraser core 105 can be replaced with each other. After replacement, the left side is the eraser core 105, and the right side is the pencil core 103. The setting length ratio of the eraser core 105 and the pencil core 103 is 1:1. The diameters of the pencil core 103 and the eraser core 105 are the same.

[0036] The processing technology of the pencil with dual-purpose core is as follows: Step 1: Take two pieces of wood and process them into a first half-barrel and a second half-barrel. The pencil core mounting groove and the eraser core mounting groove are arranged in the axial direction on the first half-barrel and the second half-barrel. The pencil core mounting groove and the eraser core mounting groove are processed by one-time slotting. Step 2: The pencil core is extruded by an extruder and cut to a predetermined length, which is half the length of the pencil barrel. Step 3: The eraser core is injection molded by a mold (the mold is opened according to the size of the combined eraser core mounting groove), and the molded eraser core is trimmed and polished. The length of the eraser core is half the length of the pencil barrel. Step 4: Embed the pencil core and the eraser core into the pencil core mounting groove and the eraser core mounting groove of the first pencil barrel respectively, and then splice and bond the second half-barrel with the first half-barrel to form a pencil barrel, so that the pencil core and the eraser core are fixedly installed between the first half-barrel and the second half-barrel. Step 5: Take the central axis of the pencil core and the eraser core as the center to process the pencil barrel into a triangular shape, that is, the cross section of the pencil barrel is triangular. The pencil core side coating and the eraser core side coating are arranged on the outer side wall of the pencil barrel. The two parts of the coating meet and have a clear boundary line at the meeting place.

[0037] As shown in Figure 2 and Figure 4 The circular pencil with dual-purpose core includes a pencil barrel 104, a pencil core 103, and an eraser core 105. The cross section of the pencil barrel 104 is circular. A coating is arranged on the outer side wall of the pencil barrel 104. The coating is composed of a pencil part coating 101 and an eraser part coating 102. There is a clear boundary line at the meeting place of the pencil part coating 101 and the eraser part coating 102. The position of the boundary line corresponds to the position where the pencil core 103 and the eraser core 105 meet.

[0038] The pen barrel 104 is composed of a first half-barrel and a second half-barrel which are symmetrically arranged about a central axis, and the first half-barrel and the second half-barrel are provided with a pencil core mounting groove and a rubber core mounting groove, and the pencil core mounting groove and the rubber core mounting groove on the first half-barrel and the second half-barrel are combined to form a cavity for mounting a pencil core and a cavity for mounting a rubber core.

[0039] The cavity for mounting the pencil core and the cavity for mounting the rubber core are connected, the pencil core 103 is fixedly embedded in the cavity for mounting the pencil core, and the rubber core 105 is fixedly embedded in the cavity for mounting the rubber core.

[0040] The writing end of the pencil core 103 is outwardly directed, the erasing end of the rubber core 105 is outwardly directed, and the first connecting end of the pencil core 103 and the second connecting end of the rubber core 105 are connected.

[0041] The pencil core 103 and the rubber core 105 are arranged along the central axis of the pen barrel 104, as shown in the figure, the left side is the pencil core 103, and the right side is the rubber core 105, the pencil core 103 and the rubber core 105 are arranged in a length ratio of 1:1, and the pencil core 103 and the rubber core 105 have the same diameter. Figure 4

[0042] In particular, Figure 4 The pencil core 103 and the rubber core 105 can be replaced with each other, and after the replacement, the left side is the rubber core 105, and the right side is the pencil core 103, and the pencil core 103 and the rubber core 105 are arranged in a length ratio of 1:1.

[0043] The processing technology of the above-mentioned pencil with dual-purpose cores is as follows: Step 1: two pieces of wood are taken and processed into a first half-barrel and a second half-barrel, and a pencil core mounting groove and a rubber core mounting groove are processed on the first half-barrel and the second half-barrel and arranged along the central axis, and the pencil core mounting groove and the rubber core mounting groove are processed by one-time slotting; Step 2: the pencil core is extruded by an extruder and cut to a predetermined length, which is one-half of the length of the pen barrel; Step 3: the rubber core is injection molded by a mold (the mold is opened according to the size of the combined rubber core mounting groove), and the molded rubber core is trimmed and polished, and the length of the rubber core is one-half of the length of the pen barrel; Step 4: the pencil core and the rubber core are respectively embedded into the pencil core mounting groove and the rubber core mounting groove of the first half-barrel, and then the second half-barrel is combined with the first half-barrel to form a pen barrel, so that the pencil core and the rubber core are fixedly mounted between the first half-barrel and the second half-barrel; ​Step 5: The pen barrel is processed into a circular shape with the central axis of the pencil lead and eraser core as the center, and the cross section of the pen barrel is circular. The pencil lead side coating and the eraser core side coating are arranged on the outer side wall of the pen barrel. The two coatings are connected and have a clear boundary line at the connection.

[0044] As shown in Figure 3 and Figure 4 , the hexagonal pencil with dual-purpose pencil lead includes a pen barrel 104, a pencil lead 103, and an eraser core 105. The cross section of the pen barrel 104 is hexagonal. A coating is arranged on the outer side wall of the pen barrel 104. The coating is composed of a pencil part coating 101 and an eraser part coating 102. The pencil part coating 101 and the eraser part coating 102 have a clear boundary line at the connection. The position of the boundary line corresponds to the position of the connection between the pencil lead 103 and the eraser core 105.

[0045] The pen barrel 104 is composed of a first half barrel and a second half barrel which are symmetric about the central axis. The first half barrel and the second half barrel are both provided with a pencil lead installation groove and an eraser core installation groove. The pencil lead installation grooves on the first half barrel and the second half barrel are combined to form a cavity for installing the pencil lead. The eraser core installation grooves on the first half barrel and the second half barrel are combined to form a cavity for installing the eraser core.

[0046] The cavity for installing the pencil lead and the cavity for installing the eraser core are connected. The pencil lead 103 is fixedly embedded in the cavity for installing the pencil lead. The eraser core 105 is fixedly embedded in the cavity for installing the eraser core.

[0047] The writing end of the pencil lead 103 faces outward, and the erasing end of the eraser core 105 faces outward. The first connection end of the pencil lead 103 and the second connection end of the eraser core 105 are connected.

[0048] The pencil lead 103 and the eraser core 105 are arranged along the central axis of the pen barrel 104. As shown in Figure 4 , the left side is the pencil lead 103, and the right side is the eraser core 105. The pencil lead 103 and the eraser core 105 are arranged in a length ratio of 1:1. The pencil lead 103 and the eraser core 105 have the same diameter.

[0049] In particular, Figure 4 The arrangement positions of the pencil lead 103 and the eraser core 105 can be replaced. After replacement, the left side is the eraser core 105, and the right side is the pencil lead 103. The pencil lead 103 and the eraser core 105 are arranged in a length ratio of 1:1.

[0050] The processing technology of the above-mentioned pencil with dual-purpose pencil lead is as follows: Step 1: two pieces of wood are processed into a first half-rod and a second half-rod, and pencil core mounting slots and eraser core mounting slots are processed on the first half-rod and the second half-rod along the central axis direction, and the pencil core mounting slots and the eraser core mounting slots are processed by one-time slotting; Step 2: the pencil core is extruded by an extruder and cut to a preset length, which is half the length of the pencil rod; Step 3: the eraser core is injection molded by a mold (the mold is opened according to the size of the combined eraser core mounting slot), and the molded eraser core is trimmed and polished, and the length of the eraser core is half the length of the pencil rod; Step 4: the pencil core and the eraser core are respectively embedded into the pencil core mounting slot and the eraser core mounting slot of the first pencil rod, and then the second half-rod is spliced and bonded with the first half-rod to form a pencil rod, so that the pencil core and the eraser core are fixedly installed between the first half-rod and the second half-rod; Step 5: the pencil rod is processed into a hexagonal shape with the central axis line of the pencil core and the eraser core as the center, here the cross section of the pencil rod is hexagonal, and pencil core side coating and eraser core side coating are provided on the outer side wall of the pencil rod, the two coating parts are connected and have obvious boundary lines at the connection.

[0051] As shown in Figure 5 and Figure 6 , the round rod type pencil with dual-purpose pencil core includes a pencil rod 104, a pencil core 103 and an eraser core 105, the cross section of the pencil rod 104 is circular, and a coating is provided on the outer side wall of the pencil rod 104, the coating is composed of a pencil part coating 101 and an eraser part coating 102, the pencil part coating 101 and the eraser part coating 102 have obvious boundary lines at the connection, and the position of the boundary lines corresponds to the position of the connection of the pencil core 103 and the eraser core 105.

[0052] The pencil rod 104 is composed of a first half-rod and a second half-rod which are spliced and bonded, the first half-rod and the second half-rod are symmetrical about the central axis, the first half-rod and the second half-rod are both provided with pencil core mounting slots and eraser core mounting slots, the pencil core mounting slots on the first half-rod and the second half-rod are combined to form a cavity for installing the pencil core, and the eraser core mounting slots on the first half-rod and the second half-rod are combined to form a cavity for installing the eraser core.

[0053] The cavity for installing the pencil core and the cavity for installing the eraser core are connected, the pencil core 103 is fixedly embedded in the cavity for installing the pencil core, and the eraser core 105 is fixedly embedded in the cavity for installing the eraser core.

[0054] The writing end of the pencil core 103 faces outward, the erasing end of the eraser core 105 faces outward, and the first connecting end of the pencil core 103 and the second connecting end of the eraser core 105 are connected.

[0055] The pencil core 103 and the eraser core 105 are arranged along the central axis direction of the pencil rod 104, as shown inFigure 5 As shown, the left side is pencil lead 103 and the right side is eraser lead 105. The length ratio of pencil lead 103 to eraser lead 105 is 4:1, and the diameters of pencil lead 103 and eraser lead 105 are the same.

[0056] The manufacturing process for the above-mentioned pencils with dual-purpose leads is as follows: Step 1: Take two pieces of wood and process them into the first half and the second half respectively. On both the first half and the second half, process the pencil lead mounting groove and the eraser mounting groove along the central axis. The pencil lead mounting groove and the eraser mounting groove are completed in one grooving process. Step 2: The pencil lead is extruded by the extruder and cut to a preset length, which is three-quarters the length of the pencil barrel; Step 3: The eraser core is injected into the mold (the mold is made according to the size of the mounting groove of the assembled eraser core), and the formed eraser core is trimmed and polished. The length of the eraser core is one-quarter of the pen barrel. Step 4: Insert the pencil lead and eraser into the pencil lead mounting slot and eraser mounting slot of the first pen barrel respectively, and then glue the second half of the barrel to the first half of the barrel to form a pen barrel, so that the pencil lead and eraser are fixedly installed between the first half of the barrel and the second half of the barrel. Step 5: Using the central axis of the pencil lead and eraser as the center, process the pen barrel into a circle. This means that the cross-section of the pen barrel is circular. Apply a pencil lead side coating and an eraser side coating to the outer wall of the pen barrel. The two coatings are connected and there is a clear boundary line at the junction.

[0057] In particular, Figure 6 The length ratios of the pencil lead 103 and the eraser lead 105 can be interchanged, so the length ratio of the pencil lead 103 and the eraser lead 105 is 1:4.

[0058] In particular, the pen barrel 104 can be configured in different styles, including triangular barrels, hexagonal barrels, etc.

[0059] Example 5, as Figure 7 and Figure 8 As shown, the round-barreled pencil with dual-purpose lead includes a barrel 104, a pencil lead 103, and an eraser lead 105. The barrel 104 has a circular cross-section, and a coating is provided on the outer wall of the barrel 104. The coating consists of a pencil part coating 101 and an eraser part coating 102. There is a clear boundary line at the junction of the pencil part coating 101 and the eraser part coating 102. The position of the boundary line corresponds to the position where the pencil lead 103 and the eraser lead 105 meet.

[0060] The pen barrel 104 is composed of a first half and a second half glued together. The first half and the second half are symmetrical about the central axis. Both the first half and the second half are provided with a pencil lead mounting groove and an eraser mounting groove. The pencil lead mounting grooves on the first half and the second half are joined together to form a cavity for mounting pencil leads, and the eraser mounting grooves on the first half and the second half are joined together to form a cavity for mounting eraser leads.

[0061] The cavity for installing pencil lead and the cavity for installing eraser lead are connected. The pencil lead 103 is fixedly embedded in the cavity for installing pencil lead, and the eraser lead 105 is fixedly embedded in the cavity for installing eraser lead.

[0062] The writing end of the pencil lead 103 faces outward, the erasing end of the eraser lead 105 faces outward, and the first connecting end of the pencil lead 103 and the second connecting end of the eraser lead 105 are connected.

[0063] The pencil lead 103 and eraser lead 105 are arranged along the central axis of the pencil barrel 104, such as... Figure 6 As shown, the left side is pencil lead 103 and the right side is eraser lead 105. The length ratio of pencil lead 103 and eraser lead 105 is 7:3, and the diameters of pencil lead 103 and eraser lead 105 are the same.

[0064] The manufacturing process for the above-mentioned pencils with dual-purpose leads is as follows: Step 1: Take two pieces of wood and process them into the first half and the second half respectively. On both the first half and the second half, process the pencil lead mounting groove and the eraser mounting groove along the central axis. The pencil lead mounting groove and the eraser mounting groove are completed in one grooving process. Step 2: The pencil lead is extruded by the extruder and cut to a preset length, which is seven-tenths of the pencil barrel length; Step 3: The eraser core is injected into the mold (the mold is made according to the size of the mounting groove of the assembled eraser core), and the formed eraser core is trimmed and polished. The length of the eraser core is three-tenths of the pen barrel. Step 4: Insert the pencil lead and eraser into the pencil lead mounting slot and eraser mounting slot of the first pen barrel respectively, and then glue the second half of the barrel to the first half of the barrel to form a pen barrel, so that the pencil lead and eraser are fixedly installed between the first half of the barrel and the second half of the barrel. Step 5: Using the central axis of the pencil lead and eraser as the center, process the pen barrel into a circle. This means that the cross-section of the pen barrel is circular. Apply a pencil lead side coating and an eraser side coating to the outer wall of the pen barrel. The two coatings are connected and there is a clear boundary line at the junction.

[0065] In particular, Figure 8 The length ratio of the pencil lead 103 and the eraser lead 105 can be interchanged, so the length ratio of the pencil lead 103 and the eraser lead 105 is 3:7.

[0066] In particular, the pen barrel 104 can be provided in different styles, including triangular, hexagonal, and the like.

[0067] Embodiment 6, as Figure 9 shown, the round rod type pencil with dual-purpose refill includes a pen barrel 104, a pencil core 103 and a rubber core 105, the cross section of the pen barrel 104 is circular, the outer wall of the pen barrel 104 is provided with a coating, which is composed of a pencil part coating 101 and a rubber part coating 102, there is a clear boundary line at the joint of the pencil part coating 101 and the rubber part coating 102, and the position of the boundary line corresponds to the joint position of the pencil core 103 and the rubber core 105.

[0068] The pen barrel 104 is composed of a first half barrel and a second half barrel which are symmetrically bonded together, the first half barrel and the second half barrel are both provided with a pencil core mounting groove and a rubber core mounting groove, the pencil core mounting grooves on the first half barrel and the second half barrel are combined to form a cavity for mounting the pencil core, and the rubber core mounting grooves on the first half barrel and the second half barrel are combined to form a cavity for mounting the rubber core.

[0069] The cavity for mounting the pencil core and the cavity for mounting the rubber core are connected, the pencil core 103 is fixedly embedded in the cavity for mounting the pencil core, and the rubber core 105 is fixedly embedded in the cavity for mounting the rubber core.

[0070] The writing end of the pencil core 103 faces outward, the erasing end of the rubber core 105 faces outward, and the first connecting end of the pencil core 103 and the second connecting end of the rubber core 105 are connected.

[0071] The pencil core 103 and the rubber core 105 are arranged along the central axis direction of the pen barrel 104, as Figure 6 shown, the left side is the pencil core 103 and the right side is the rubber core 105, the setting length ratio of the pencil core 103 and the rubber core 105 is 1:1, and the diameter ratio of the pencil core 103 and the rubber core 105 is 1:2.

[0072] The processing technology of the above-mentioned pencil with dual-purpose refill is as follows: Step 1: two pieces of wood are taken and processed into a first half barrel and a second half barrel, and pencil core mounting grooves and rubber core mounting grooves are processed on the first half barrel and the second half barrel along the central axis direction, wherein the rubber core mounting grooves are processed first, and the feeding amount of the rubber core mounting grooves is one-half of the length of the pen barrel, and then the pencil core mounting grooves are processed; Step 2: the pencil core is extruded by an extruder and cut to a predetermined length, which is one-half of the length of the pen barrel; Step 3: the rubber core is injection molded by a mold (the mold is opened according to the size of the assembled rubber core installation groove), and the molded rubber core is trimmed and polished, and the length of the rubber core is half of the pen barrel; Step 4: the pencil core and the rubber core are respectively embedded into the pencil core installation groove and the rubber core installation groove of the first pen barrel, and the second half barrel is spliced and bonded with the first half barrel to form a pen barrel, so that the pencil core and the rubber core are fixedly installed between the first half barrel and the second half barrel; Step 5: the pen barrel is processed into a circular shape with the central axis of the pencil core and the rubber core as the center, here the cross section of the pen barrel is circular, the pencil core side coating and the rubber core side coating are arranged on the outer wall of the pen barrel, the two coating parts are connected and there is a clear boundary line at the connecting position.

[0073] In particular, the setting length ratio of the pencil core 103 and the rubber core 105 can be variable.

[0074] In particular, the pen barrel 104 can be provided in different styles, including triangular rods, hexagonal rods, etc.

[0075] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A manufacturing process for a pencil with a dual-purpose lead, characterized in that, Includes (1) pen barrel processing; (2) Preparation of pencil lead and eraser lead; (3) Embed the pencil lead and the eraser core into the pen barrel; (4) A coating is applied to the outer wall of the pen barrel; Step (1) includes the following steps: a. The pen barrel is composed of a first half and a second half that are symmetrical about the central axis. Take two pieces of wood and process them into the first half and the second half respectively. b. A pencil lead mounting groove and an eraser mounting groove are machined on both the first half rod and the second half rod, with the shape and size of the pencil lead mounting groove on the first half rod and the second half rod corresponding to half a pencil lead, and the shape and size of the eraser mounting groove corresponding to half a eraser lead. Step (2) includes the following steps: a. The pencil lead is extruded by an extruder and cut to the length of the pencil lead mounting groove; b. Open the mold according to the assembled rubber core mounting groove, the rubber core is injected into the mold and formed, and the formed rubber core is trimmed and polished; Step (3) includes the following steps: a. Insert the pencil lead and eraser into the pencil lead mounting slot and eraser mounting slot of the first pen barrel respectively, and then glue the second half of the barrel to the first half of the barrel to form a pen barrel, so that the pencil lead and eraser are fixedly installed between the first half of the barrel and the second half of the barrel. Step (4) includes the following steps: a. The pen barrel shape is processed with the central axis of the pencil lead and the eraser lead as the center. A pencil lead side coating and an eraser lead side coating are set on the outer wall of the pen barrel. The two coatings are connected and there is a clear boundary line at the connection point.

2. The processing technology of a pencil with a dual-purpose lead according to claim 1, characterized in that, The pencil lead mounting slot is connected to the eraser lead mounting slot, and the pencil lead is connected to the eraser lead.

3. The processing technology of a pencil with a dual-purpose lead according to claim 2, characterized in that, The pencil lead mounting groove and the eraser lead mounting groove have the same diameter, and the pencil lead mounting groove and the eraser lead mounting groove are completed in one grooving process.

4. The processing technology of a pencil with a dual-purpose lead according to claim 2, characterized in that, The pencil lead mounting groove and the eraser lead mounting groove have different diameters. The diameter of the pencil lead mounting groove is smaller than that of the eraser lead mounting groove. During processing, the eraser lead mounting groove is processed first, and then the pencil lead mounting groove is processed.

5. The processing technology of a pencil with a dual-purpose lead according to claim 1, characterized in that, The ratio of the cross-sectional diameter of the pencil lead mounting groove to that of the eraser lead mounting groove is 1:

2.

6. The processing technology of a pencil with a dual-purpose lead according to claim 1, characterized in that, The boundary line is located at the junction of the pencil lead and the eraser lead.

7. The pencil with a dual-purpose lead processed by the above-described processing technique is characterized in that, The pen includes a barrel, a pencil lead, and an eraser. The barrel has a cavity along its central axis. The pencil lead and the eraser are fixedly disposed in the cavity. The pencil lead and the eraser are disposed along the central axis of the barrel, and the central axis of the pencil lead coincides with the central axis of the eraser. The pencil lead includes a writing end and a first connecting end, and the eraser lead includes an erasing end and a second connecting end. The first connecting end is connected to the second connecting end, and the writing end and the erasing end are opposite to each other.

8. The pencil with a dual-purpose lead according to claim 7, characterized in that, The pen barrel is composed of a first half and a second half glued together. The first half and the second half are symmetrical about the central axis, and both the first half and the second half are provided with a pencil lead mounting groove and an eraser mounting groove. The pencil lead mounting grooves on the first half and the second half are joined together to form a cavity for mounting pencil lead, and the eraser mounting grooves on the first half and the second half are joined together to form a cavity for mounting eraser. The outer wall of the pen barrel is provided with a coating. The coating is divided into two parts and located on the pencil lead side and the eraser lead side respectively. The two parts of the coating are connected and there is a clear boundary line at the junction of the pencil lead and the eraser lead.

9. The pencil with a dual-purpose lead according to claim 8, characterized in that, The length ratio of the pencil lead to the eraser lead is 1:1, 4:1, 1:4, 7:3, or 3:

7.

10. The pencil with a dual-purpose lead according to claim 8, characterized in that, The diameter of the pencil lead is the same as the diameter of the eraser core, or the diameter of the eraser core is twice the diameter of the pencil lead.

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