Brush head of eyebrow brush and manufacturing method thereof

Abstract

The invention relates to the field of cosmetics. The brow brush head comprises a base located in the horizontal direction and bristles located in the vertical direction, the bottoms of the bristles are connected to the base, the cross section of the base is in a polygonal shape, and at least one vertically-through hole is formed in the base. The base is provided with a plastic layer made of plastic, and the bottoms of the bristles are connected to the plastic layer. The structure of the eyebrow brush head is optimized, on one hand, the base is in a polygonal shape, the number of bristles can be effectively increased, and then the coating area is increased, on the other hand, the open hole is additionally formed in the base, the supporting column on the eyebrow brush handle is inserted through the open hole, and the position of the eyebrow brush head can be effectively limited.

Description

Technical Field

[0001] This invention relates to the field of cosmetics, specifically to eyebrow brush heads. Background Technology

[0002] Most existing eyebrow brush heads are long or stick-shaped, which limits the coverage area. Summary of the Invention

[0003] The purpose of this invention is to provide an eyebrow brush head to solve at least one of the above-mentioned technical problems.

[0004] The purpose of this invention is to provide a method for manufacturing an eyebrow brush head.

[0005] An eyebrow brush head includes a base in a horizontal direction and bristles in a vertical direction, the bottom of which is connected to the base. The base has a polygonal cross-section and at least one through-hole is provided on the base.

[0006] The base has a plastic layer made of plastic, and the bottom of the brush bristles is connected to the plastic layer.

[0007] Preferably, the upper surface of the base has a downward recess.

[0008] Preferably, the bristles are made of plastic, and the base is formed by hot-melting or hot-pressing the bottom of the bristles.

[0009] Preferably, a flocking layer is provided on the bottom of the bristles or on the upper surface of the base, and the flocking length of the flocking layer is less than the length of the bristles.

[0010] Preferably, the top of the bristles is sloping.

[0011] Preferably, the bristles at the opening are inclined toward the central axis of the opening.

[0012] Preferably, the base is provided with a grid layer, which is formed by overlapping warp and weft threads, and the warp and weft threads are partially or completely embedded in the plastic layer.

[0013] The method for manufacturing an eyebrow brush head is characterized by including the following steps:

[0014] Step 1: Make the bristles, then arrange multiple bristles in parallel to obtain a bristle bundle;

[0015] Step 2: Insert the bottom of the bristle bundle into the first mold. The first mold has a first receiving cavity with the opening facing upwards, and the bottom of the first receiving cavity has a protrusion.

[0016] Step 3: Inject molten plastic into the first receiving cavity, or place plastic granules into the first receiving cavity and then heat the first receiving cavity to melt the plastic granules to obtain molten plastic; or heat the first receiving cavity to melt the ends of the bristles to obtain molten plastic; the top of the molten plastic is lower than the top of the protrusion.

[0017] Step 4: Cool the first mold to solidify the molten plastic. After demolding, a base with brush bristles is obtained.

[0018] Step 5: Cut the base into a polygonal shape and trim the top of the bristles to obtain the eyebrow brush head.

[0019] Preferably, before step 2, the following steps are also included: Step a. Inserting the top of the bristle bundle upside down into the second mold, the second mold having an upward-facing second receiving cavity with a flat bottom; Step b. Injecting molten plastic into the second receiving cavity, or placing plastic granules in the second receiving cavity and then heating the second receiving cavity to melt the plastic granules, thereby obtaining molten plastic; or heating the second receiving cavity to melt the ends of the bristles, thereby obtaining molten plastic; Step c. Cooling the second mold to solidify the molten plastic, and after demolding, obtaining a bristle bundle with a fixed top.

[0020] Preferably, in step 4, the first mold is cooled by stopping the heating of the first mold and blowing cold air into the first mold. The cold air is high-pressure cold air, and the air outlet of the cold air is located directly above the protrusion and facing the protrusion.

[0021] Beneficial Effects: 1. This invention optimizes the structure of the eyebrow brush head. On one hand, the polygonal base effectively increases the number of bristles, thereby increasing the coating area. On the other hand, an opening is added to the base, through which a support post on the eyebrow brush handle is inserted, effectively restricting the position of the eyebrow brush head. 2. This invention optimizes the preparation method of the eyebrow brush, featuring simple processing and convenient operation. 3. In this invention, when connecting the bristles to the base, the top of the bristles is fixed first, ensuring that even if the bristles are unevenly distributed at the bottom, the top remains uniform. 4. The top of the bristles in the eyebrow brush head of this invention is beveled, increasing the coating area and allowing for large-area coating. Simultaneously, the clearly defined and protruding edge contour facilitates detailed brushing using the edges. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an eyebrow brush head. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0024] Reference Figure 1 The eyebrow brush head includes a base 2 in a horizontal direction and bristles 1 in a vertical direction, with the bottom of the bristles 1 connected to the base 2. The base 2 has a polygonal cross-section, preferably square, to increase the cross-sectional area of ​​the eyebrow brush head and thus the coating area. Preferably, the top of the bristles 1 is beveled to increase the area of ​​the top of the bristles 1, further increasing the coating area. The base 2 has at least one through-hole 3. When there is only one hole, it is located at the center of the base 2. When there are two or more holes, there is a gap between adjacent holes. This allows the brush handle to be inserted through the hole, reducing the shaking and displacement of the eyebrow brush head. The base 2 has a plastic layer, and the bottom of the bristles 1 is connected to the plastic layer. The base 2 may have a certain thickness, and the bristles 1 are inserted after the upper surface of the base 2 is heat-fused. Preferably, the bristles 1 are made of plastic, and the base 2 is formed by heat-fusion or heat-pressing the bottom of the bristles 1. At this point, the bristles 1 are connected to the base 2 at their bottoms. This structure has the following advantages: firstly, the bristles 1 have a high density, resulting in a more uniform color when coating large areas; secondly, the bristles 1 support each other, making them less prone to deformation.

[0025] Yes, the upper surface of the base 2 has a downward recess. The downward recess on the upper surface of the base 2 changes the orientation of the bristles 1 thereon, thereby making the top of the bristles 1 relatively uniform.

[0026] Yes, a flocked layer can be provided on the bottom of the bristles 1 or the upper surface of the base 2, with the flock length being shorter than the bristle length 1. This flocked layer increases the support of the bristles 1, reduces their deformation, or adjusts their relative position or orientation. Alternatively, the base 2 can have a mesh layer composed of overlapping warp and weft threads, partially or completely embedded in a plastic layer. This allows adjustment of the spacing or orientation of the bristles 1, ultimately causing the bristles 1 at the opening to tilt towards the central axis of the opening. This results in a more uniform distribution of the bristles 1 at the top, preventing the opening from being completely bare.

[0027] The method for making an eyebrow brush head includes the following steps:

[0028] Step 1: Create brush bristles 1, then arrange multiple brush bristles 1 in parallel to obtain a bristle bundle. Multiple brush bristles 1 can be arranged parallel and closely to prevent displacement or misalignment during movement. Alternatively, the bristle bundle can pass through the warp and weft threads of the mesh layer, and the orientation, position, and spacing of the bristles 1 can be adjusted by adjusting the spacing and position of the warp and weft threads. Alternatively, flocking can be added to the bottom of the brush bristles 1 to limit the spacing of the bristles 1. The warp and weft threads can be metal wires, preferably with a melting point greater than that of the base 2. In step 2, the warp and weft threads move with the bottom of the brush bristles 1 and are fully or partially inserted into the molten plastic. At protruding positions, clips can be used to adjust the position of the warp and weft threads, offsetting the protrusions. Alternatively, the protrusions can have upward-facing notches into which the warp or weft threads are inserted. Alternatively, the warp or weft threads can be lifted up by the protrusions. During later use, the warp and weft threads serve to support the base 2 and reduce its deformation. Alternatively, the warp and weft threads can be made of the same material as the base 2, and during the hot-melt process in step 2, they melt to form part of the molten plastic. Compared to using metal wire, this method ensures a smoother surface on the base 2, improving the adhesion of cosmetics to the surface of the base 2 during later use.

[0029] Step 2: Insert the bottom of the bristle bundle into the first mold. The first mold has an upward-facing receiving cavity with a protrusion on its bottom. Option 1: The bristles 1 above the protrusion are lifted by the protrusion; remove the bristles 1 lifted by the protrusion. The advantage of Option 1 is that the bristles 1 are evenly distributed on the base 2, and it is convenient to blow cold air into the protrusion. The disadvantage is that after demolding, the base 2 forms an opening at the position corresponding to the protrusion, and there are no bristles 1 above the opening. Option 2: Distribute the bristles 1 facing the protrusion to the periphery of the protrusion, adjusting their position using warp or weft threads. Option 2 can make the top distribution of the bristles 1 more even, effectively solving the problem of no bristles 1 above the opening. Preferably, before step 2, the following steps are also included: Step a. Inserting the top of the bristle bundle upside down into the second mold, the second mold having an upward-facing second receiving cavity with a flat bottom; Step b. Injecting molten plastic into the second receiving cavity, or placing plastic granules in the second receiving cavity and then heating the second receiving cavity to melt the plastic granules, obtaining molten plastic; or heating the second receiving cavity to melt the ends of the bristles 1, obtaining molten plastic; Step c. Cooling the second mold to solidify the molten plastic, and after demolding, obtaining a bristle bundle with a fixed top. By fixing the top of the bristle bundle, the uniformity of the bristle bundle top distribution can be maintained during the process of connecting the bottom of the bristles 1 to the base 2, especially during the dispersion process under scheme 2.

[0030] Step 3, Scheme 1: Inject molten plastic into the first receiving cavity; Scheme 2: Place plastic granules into the first receiving cavity and then heat the first receiving cavity to melt the plastic granules, obtaining molten plastic; Scheme 3: Heat the first receiving cavity to melt the ends of the brush bristles 1, obtaining molten plastic. The top of the molten plastic is lower than the top of the protrusion. For Schemes 1 and 2, the brush bristles 1 can be inserted first and then the plastic can be melted. Alternatively, the plastic can be melted first and then the brush bristles 1 can be inserted. Schemes 1 and 2 do not restrict the material of the brush bristles 1. For Scheme 3, the brush bristles 1 are preferably made of hot-melt plastic.

[0031] Step 4: Cool the first mold to solidify the molten plastic. After demolding, a base with brush bristles 1 is obtained. This can be achieved by stopping heating the first mold and simultaneously blowing cold air into it. In Step 2, Scheme 1, the cold air is high-pressure cold air (1.5-2 atmospheres), with the air outlet located directly above and towards the protrusion. This high-pressure cold air creates a downward indentation on the upper surface of the base 2, causing the brush bristles 1 to change direction. This invention selects the appropriate cooling method and airflow location; the cold air not only cools the mold but also straightens the direction of the brush bristles 1 and creates a downward indentation in the base 2. In Step 2, Scheme 2, water cooling is preferred to avoid air cooling causing the brush bristles 1 to shift or change direction.

[0032] Step 5: Cut the base into a polygonal shape and trim the top of the bristles 1 to obtain the eyebrow brush head. The top of the bristles 1 is preferably trimmed into a beveled shape. It can also be serrated. This increases the coating area of ​​the bristles 1, allowing for large-area coating, while the clearly defined edge contours facilitate detailed brushing using the edges.

[0033] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. Eyebrow brush head, comprising a base in horizontal direction, bristles in vertical direction, the bottom of the bristles being connected to the base, characterized in that, The cross section of the base is polygonal, and the base is provided with at least one through hole; The base is provided with a plastic layer made of plastic material, and the bottom of the bristles is connected to the plastic layer.

2. The eyebrow brush head of claim 1, wherein, The upper surface of the base is provided with a downward recess.

3. The eyebrow brush head of claim 1, wherein, The bristles are made of plastic material, and the base is connected by hot melting or hot pressing at the bottom of the bristles.

4. The eyebrow brush head of claim 1, wherein, The bottom of the bristles or the upper surface of the base is provided with a flocking layer, and the length of the flocking layer is less than the length of the bristles.

5. The eyebrow brush head of claim 1, wherein, The top of the bristles is inclined to the center axis of the hole.

6. The eyebrow brush head of claim 1, wherein, The base is provided with a grid layer, and the grid layer is formed by the intersection of warp and weft, and the warp and weft are partially or completely embedded in the plastic layer.

7. The eyebrow brush head of claim 1, wherein, The method comprises the following steps:

8. A method of making a brush head for an eyebrow brush, characterized in that Step 1: making bristles, then arranging a plurality of bristles in parallel to obtain a bristle bundle; Step 2: inserting the bottom of the bristle bundle into a first mold, the first mold is provided with a first accommodating cavity with an upward opening, and the bottom of the first accommodating cavity is provided with a protrusion; Step 3: injecting molten plastic into the first accommodating cavity, or placing plastic particles in the first accommodating cavity and then heating the first accommodating cavity to melt the plastic particles to obtain molten plastic, or heating the first accommodating cavity to melt the end of the bristle to obtain molten plastic; the top of the molten plastic is lower than the top of the protrusion; Step 4: cooling the first mold to solidify the molten plastic, and after demolding, a base with bristles is obtained; Step 5: cutting the base into a polygonal shape, trimming the top of the bristles, and obtaining an eyebrow brush head. Before step 2, the following steps are further included: step a. inserting the top of the bristle bundle into a second mold, the second mold is provided with a second accommodating cavity with an upward opening, and the bottom of the second accommodating cavity is flat; step b. injecting molten plastic into the second accommodating cavity, or placing plastic particles in the second accommodating cavity and then heating the second accommodating cavity to melt the plastic particles to obtain molten plastic, or heating the second accommodating cavity to melt the end of the bristle to obtain molten plastic; step c. cooling the second mold to solidify the molten plastic, and after demolding, a bristle bundle with a fixed top is obtained.

9. The method of claim 8, wherein the step of forming the brush head comprises the step of: In step 4, the first mold is cooled by stopping heating and blowing cold air into the first mold, the cold air is high-pressure cold air, and the air outlet of the cold air is located directly above the protrusion and faces the protrusion.

10. The method of claim 8, wherein the brush head is a brow brush head. ​

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