Plastic rod three-in-one crayon easy to roll and sharpen and preparation method thereof
By using easily shaving plastic rods and casting molding process to produce three-in-one crayons, the problems of traditional crayons being environmentally unfriendly and inconvenient to use have been solved, resulting in low-carbon, environmentally friendly, high-efficiency, and low-cost crayon products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional crayons use wood as the wrapping material, which is not environmentally friendly. The production process is complicated and costly. They are also prone to accidental staining and difficult to clean. Furthermore, they have poor biodegradability. Three-in-one crayon products on the market are wasteful and inconvenient.
The three-in-one crayon is made by using an easily rollable plastic rod as the wrapping material and by casting molding. The three-in-one crayon refill is fixed with resin materials and adhesives. The inner wall is designed to be smooth or toothed to prevent detachment. The crayon refill is made by combining materials such as paraffin wax, fatty acids and beeswax.
This invention achieves a three-in-one crayon that is low-carbon and environmentally friendly, highly efficient in production, and low in cost. It is easy to use and easy to clean, avoiding the waste of wood and the shortcomings of traditional crayons.
Smart Images
Figure CN121733972A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of drawing tools, in particular to a plastic rod three-in-one wax pencil easy to roll and cut and a preparation method thereof. BACKGROUND
[0002] Traditional wax pencils are prepared from paraffin wax and other synthetic waxes, fillers and pigments as main raw materials through melting, mixing, shaping and processing, which has the advantages of simple process and low cost, but has the disadvantage that when the wax pencil is used by mistake on clothes, skin or objects, the colored objects are difficult to clean, causing trouble, and the wax pencil is easy to slip when used on smooth media. Moreover, the traditional wax pencil uses oil-soluble pigments, which have poor biodegradability and are not environmentally friendly. Considering that the users of the wax pencil are mostly children, the safety and environmental protection of the wax pencil material are more important. It can be predicted that the erasable and environmentally friendly wax pencil will be a trend and more and more popular.
[0003] The wax pencils, gouache and watercolors on the market are mostly different forms and types of commodities. In order to meet different painting needs, consumers often need to purchase and use them separately, which is inconvenient and causes waste. Therefore, a product that can be used as a wax pencil, gouache and watercolor at the same time will certainly be welcomed by the public. However, the three-in-one wax pencil on the market uses wood as the wrapping material, which uses a large amount of wood, is not low-carbon and environmentally friendly, has a complicated production process, low production efficiency and high cost. SUMMARY
[0004] The present application aims to provide a plastic rod three-in-one wax pencil easy to roll and cut and a preparation method thereof, which solves the above problems.
[0005] To solve the above technical problems, the present application adopts the following technical solutions:
[0006] The present application relates to a plastic rod three-in-one wax pencil easy to roll and cut and a preparation method thereof, which solves the above problems.
[0007] Further, the material of the plastic pen barrel is a resin material, the three-in-one wax pencil core and the inner hole of the plastic pen barrel are gap-fitted, and the inner wall of the plastic pen barrel is a smooth surface or a toothed surface.
[0008] Further, the length of the plastic pen barrel is 100-160 mm, and the wall thickness is 1-4 mm.
[0009] Further, the cooperation gap between the three-in-one wax pen core and the plastic pen barrel is 0.03-0.08mm smaller than the cross-sectional size of the plastic pen barrel.
[0010] A method for preparing a three-in-one wax pen with a plastic barrel that is easy to roll and cut, characterized by comprising the following steps
[0011] A. Manufacturing of the plastic pen barrel:
[0012] a1. Mixing of the pen barrel material: the foaming agent, pigment, rubber, PE, coarse talc powder, and foam particles are put into a stirring device according to the proportioning and are uniformly mixed to form a pen barrel mixture;
[0013] a2. Granulation of the pen barrel material: the pen barrel mixture is put into a pen barrel granulator, which heats the pen barrel mixture, and after heating, the pen barrel material particles are extruded and cooled to form the pen barrel material particles;
[0014] a3. Extrusion of the pen barrel: the pen barrel material particles are put into an extruder, the pen barrel material particles are discharged from the hopper, and after the discharge, the pen barrel material particles enter a melting heating cavity to form molten material, which is sent into a forming cavity, and after being extruded through the mold of the forming cavity, plastic pen barrels with different cross sections are formed;
[0015] a4. Water cooling: after the plastic pen barrel is extruded, it is pulled out at a uniform speed along a water cooling tank and is cooled by water;
[0016] a5. Cutting: the plastic pen barrel is cut at the end of the water cooling tank by a straightening turntable to form a semi-finished plastic pen barrel;
[0017] B. Manufacturing of the three-in-one wax pen core:
[0018] b1. Mixing of the synthetic wax of the plastic rod three-in-one wax pen: the paraffin, fatty acid, beeswax, micro-fine wax, and emulsifier are put into a stirring device according to the proportioning, heated and melted, and uniformly stirred to form the synthetic wax of the three-in-one wax pen,
[0019] b2. Mixing of the material of the plastic rod three-in-one wax pen: the molten liquid synthetic wax, pigment, and filler are put into a stirring device according to the proportioning, heated and melted, and uniformly stirred to form the three-in-one wax pen mixture;
[0020] b3. Grinding of the three-in-one wax pen mixture: the three-in-one wax pen mixture is ground 1-3 times by a three-roll grinder;
[0021] b4. Forming of the plastic rod three-in-one wax pen: the ground material is added into a dissolving barrel of a forming machine, heated and stirred to melt, poured into the mold cavity of the forming machine, cooled by cold water, and ejected and demolded, so that the three-in-one wax pen with a round or polygonal cross section is formed according to the shape of the mold cavity;
[0022] C, assembly: the plastic pen barrel, cap and three-in-one wax pencil core are assembled, the cap is installed on the plastic pen barrel during assembly, then the plastic pen barrel is injected with adhesive on the other end, then the three-in-one wax pencil core is squeezed into the plastic pen barrel, then the outer wall of the plastic pen barrel is painted, and the end of the plastic pen barrel away from the cap is sharpened after painting;
[0023] D, package finished product.
[0024] Further, the particle heating temperature of the pen barrel granulator is 150-170 DEG C.
[0025] Further, the straightening turntable is provided with a plurality of turntables, which are arranged in a staggered and equidistant manner at the end of the water cooling tank, and the outer edge surface of the straightening turntable is provided with a cutter.
[0026] Further, the mixed heating temperature of the synthetic wax of the plastic rod three-in-one wax pencil is 110-130 DEG C.
[0027] Further, the heating temperature of the plastic rod three-in-one wax pencil forming solution barrel is 90-100 DEG C, and the rotating speed of the high-speed dispersing machine is 1200 rpm during stirring, and the temperature of the cooling water is 8-18 DEG C.
[0028] Further, the cross-sectional shape of the mold cavity is circular, triangular, square and special-shaped.
[0029] Compared with the prior art, the beneficial technical effects of the present application are:
[0030] The present application adopts the easy-to-roll foaming resin material as the wrapping material of the three-in-one wax pencil color pencil, and the wax pencil is formed by pouring molding process, and the wax pencil is a circular or multi-edge special-shaped solid rod body, which is low in carbon and environmental protection, simple in process, high in production efficiency and low in cost. BRIEF DESCRIPTION OF DRAWINGS
[0031] The present application will be further described below in combination with the description of the drawings.
[0032] Fig. 1 The structure diagram of the easy-to-roll plastic rod three-in-one wax pencil of the present application is shown in the figure;
[0033] Fig. 2 The sectional view of the easy-to-roll plastic rod three-in-one wax pencil of the present application is shown in the figure;
[0034] The reference signs are explained as follows: 1, plastic pen barrel; 2, three-in-one wax pencil core; 3, cap. DETAILED DESCRIPTION
[0035] As Figs. 1-2As shown, a plastic rod three-in-one wax pencil with easy rolling and cutting function comprises a hollow plastic pen barrel 1, a cap 2 and a three-in-one wax pencil core 3, the three-in-one wax pencil core 3 is placed inside the plastic pen barrel 1, and the three-in-one wax pencil core 3 is bonded to the inner wall of the plastic pen barrel 1 by adhesive, the bottom of the cap 2 is inserted from the top of the plastic pen barrel 1, the cap 2 is fixed on the top of the plastic pen barrel 1 by the protruding ring groove, the bottom of the three-in-one wax pencil core 3 is flush with the bottom of the plastic pen barrel 1, and the top of the three-in-one wax pencil core 3 is on the bottom of the cap 2.
[0036] The material of the plastic pen barrel 1 is resin material, the three-in-one wax pencil core 3 and the inner hole of the plastic pen barrel 1 are clearance fit, and the inner wall of the plastic pen barrel 1 is smooth or toothed. When the inner wall of the plastic pen barrel 1 is toothed, the sawtooth on the inner wall of the plastic pen barrel 1 presses on the outer wall of the three-in-one wax pencil core 3, preventing the three-in-one wax pencil core 3 from separating from the plastic pen barrel 1
[0037] The length of the plastic pen barrel 1 is 100-160mm, and the wall thickness is 1-4mm.
[0038] The clearance fit between the three-in-one wax pencil core 3 and the plastic pen barrel 1 is that the cross-sectional size of the three-in-one wax pencil core 3 is smaller than the inner hole of the plastic pen barrel 1 by 0.03-0.08mm.
[0039] A method for preparing a plastic rod three-in-one wax pencil with easy rolling and cutting function, characterized by comprising the following steps
[0040] A, the production of plastic pen barrel 1:
[0041] a1, pen barrel material mixing: put the foaming agent, pigment, rubber, PE, coarse talc powder and foam particles into the stirring equipment according to the proportion, mix uniformly to form the pen barrel mixture;
[0042] a2, pen barrel material granulation: put the pen barrel mixture into the pen barrel granulator, and the pen barrel granulator heats it to 150-170℃, then extrudes and cools to form pen barrel material particles;
[0043] a3, pen barrel extrusion: put the pen barrel material particles into the extruder, the pen barrel material particles pass through the hopper, then enter the melting heating cavity to form molten material, which is sent into the molding cavity, and then extruded through the mold of the molding cavity to form plastic pen barrels with different cross sections;
[0044] a4, water cooling: after the plastic pen barrel is extruded, it is pulled out at a uniform speed along the water cooling tank and cooled by water;
[0045] a5, cutting: the plastic pen barrel is cut at the end of the water cooling tank through the straightening disc, the straightening disc is provided with a plurality of straightening discs, and the straightening discs are arranged at the end of the water cooling tank in a staggered and equidistant manner, the outer edge surface of the straightening disc is provided with a cutter, and the plastic pen barrel is cut to form a semi-finished plastic pen barrel through the cutter;
[0046] B, production of three-in-one wax pencil core 3:
[0047] b1, plastic rod three-in-one wax pencil synthetic wax mixing: the paraffin, fatty acid, beeswax, microfine wax and emulsifier are put into the stirring equipment according to the proportion, heated, melted and stirred uniformly to form three-in-one wax pencil synthetic wax,
[0048] b2, plastic rod three-in-one wax pencil material mixing: the melted liquid synthetic wax, pigment and filler are put into the stirring equipment according to the proportion, heated, melted and stirred uniformly to form three-in-one wax pencil mixed material;
[0049] b3, plastic rod three-in-one wax pencil mixed material grinding: the three-in-one wax pencil mixed material is ground for 1-3 times by a three-roll grinder;
[0050] b4, plastic rod three-in-one wax pencil forming: the ground material is added into the dissolving barrel of the forming machine, heated and stirred to melt, the heating temperature is 90-100 degrees, during stirring, the rotating speed of the high-speed dispersing machine is 1200 rpm, poured into the mold cavity of the forming machine, cooled by cooling water, the temperature of the cooling water is 8-18 degrees, ejected and demolded, according to the cross-sectional shape of the mold cavity, the three-in-one wax pencil can be formed in a round or polygonal shape, and the cross-sectional shape of the mold cavity is round, triangular, square and special-shaped;
[0051] C, assembly: the plastic pen barrel 1, the cap 2 and the three-in-one wax pencil core 3 are assembled, the cap 2 is installed on the plastic pen barrel 1 during assembly, then the adhesive is injected into the other end of the plastic pen barrel 1, then the three-in-one wax pencil core 3 is squeezed into the plastic pen barrel 1, then the outer wall of the plastic pen barrel 1 is painted, and the end of the plastic pen barrel 1 far away from the cap 2 is sharpened after painting;
[0052] D, packaging finished product.
[0053] The above-described embodiments only describe the preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.
Claims
1. A three-in-one crayon with an easy-to-sharpen plastic handle, characterized in that: The device includes a hollow plastic pen barrel (1), a cap (2), and a three-in-one crayon refill (3). The three-in-one crayon refill (3) is placed inside the plastic pen barrel (1) and is glued to the inner wall of the plastic pen barrel (1) by adhesive. The bottom of the cap (2) is inserted from the top of the plastic pen barrel (1) and the cap (2) is fixed to the top of the plastic pen barrel (1) by a protruding annular groove. The bottom of the three-in-one crayon refill (3) is flush with the bottom of the plastic pen barrel (1) and the top of the three-in-one crayon refill (3) rests on the bottom of the cap (2).
2. The three-in-one plastic crayon with an easy-to-sharpen plastic handle according to claim 1, characterized in that: The plastic pen barrel (1) is made of resin material. The inner hole of the three-in-one crayon refill (3) and the plastic pen barrel (1) are fitted with a clearance. The inner wall of the plastic pen barrel (1) is a smooth surface or a toothed surface.
3. The three-in-one plastic crayon with an easy-to-sharpen plastic handle according to claim 1, characterized in that: The plastic pen barrel (1) has a length of 100-160mm and a wall thickness of 1-4mm.
4. The three-in-one plastic crayon with an easy-to-sharpen plastic handle according to claim 1, characterized in that: The fitting gap between the three-in-one crayon refill (3) and the plastic pen barrel (1) is such that the cross-sectional dimension of the three-in-one crayon refill (3) is 0.03-0.08 mm smaller than the inner hole of the cross-section of the plastic pen barrel (1).
5. A method for preparing an easy-to-sharpen three-in-one plastic crayon according to any one of claims 1-4, characterized in that, Includes the following steps A. Making the plastic pen barrel (1): a1. Mixing of pen barrel materials: Add foaming agent, pigment, rubber, PE, coarse talc powder, and foam particles into the mixing equipment according to the formula and mix evenly to form pen barrel mixture materials; a2. Pen barrel material granulation: The pen barrel mixture is fed into the pen barrel granulator, which heats it and then extrudes and cools it to produce pen barrel material granules. a3. Pen barrel extrusion: The pen barrel material granules are fed into the extruder. The pen barrel material granules are discharged through the hopper and then enter the melting and heating chamber to form molten material. The molten material is sent into the molding chamber and extruded through the mold in the molding chamber to form plastic pen barrels with different cross sections. a4. Water cooling: After the plastic pen barrel is extruded, it is pulled out at a constant speed along the water cooling tank and cooled by water. a5. Cutting: The plastic pen barrel is cut at the end of the water-cooling tank by a straightening turntable to form a semi-finished plastic pen barrel; B. Making the 3-in-1 crayon refill (3): b1. Mixing of synthetic wax for three-in-one plastic crayons: Paraffin wax, fatty acids, beeswax, micro-refined wax, and emulsifier are added to a mixing device according to the specified ratio, heated and stirred until homogeneous, forming synthetic wax for three-in-one crayons. b2. Mixing of materials for three-in-one plastic crayons: Molten liquid synthetic wax, pigments, and fillers are added to a mixing device according to the formula, heated and stirred evenly to form a three-in-one crayon mixture. b3. Grinding of plastic rod three-in-one crayon mixture: Grind the three-in-one crayon mixture 1-3 times using a three-roll mill; b4. Molding of three-in-one plastic crayons: The ground material is added to the melting tank of the molding machine, heated and stirred to melt, poured into the mold cavity of the molding machine, cooled by cold water, and ejected from the mold. Depending on the cross-sectional shape of the mold cavity, round or polygonal three-in-one crayons can be formed. C. Assembly: Assemble the plastic pen barrel (1), cap (2) and three-in-one crayon refill (3). When assembling, install the cap (2) on the plastic pen barrel (1), then inject adhesive into the other end of the plastic pen barrel (1), then press the three-in-one crayon refill (3) into the plastic pen barrel (1), then paint the outer wall of the plastic pen barrel (1), and after painting, sharpen the end of the plastic pen barrel (1) away from the cap (2); D. Packaging the finished product.
6. The method for preparing the easily shaving plastic rod three-in-one crayon according to claim 5, characterized in that: The pellet heating temperature of the pen barrel granulator is 150-170℃.
7. The method for preparing the easily shaving plastic rod three-in-one crayon according to claim 5, characterized in that: The straightening turntable is provided in several ways and is arranged at equal intervals at the end of the water cooling tank. The outer edge of the straightening turntable is provided with a cutter.
8. The method for preparing the easily shaving plastic rod three-in-one crayon according to claim 5, characterized in that: The plastic rod three-in-one crayon has a synthetic wax mixing and heating temperature of 110-130 degrees Celsius.
9. The method for preparing the easily shaving plastic rod three-in-one crayon according to claim 5, characterized in that: The heating temperature of the plastic rod three-in-one crayon molding melting tank is 90-100 degrees Celsius. During stirring, the speed of the high-speed disperser is 1200 rpm, and the temperature of the cooling water is 8-18 degrees Celsius.
10. The method for preparing the easily shaving plastic rod three-in-one crayon according to claim 5, characterized in that: The cross-sectional shape of the mold cavity can be circular, triangular, square, or irregular.