CN111387690A - Brush head and manufacturing method thereof - Google Patents
Brush head and manufacturing method thereof Download PDFInfo
- Publication number
- CN111387690A CN111387690A CN202010305852.7A CN202010305852A CN111387690A CN 111387690 A CN111387690 A CN 111387690A CN 202010305852 A CN202010305852 A CN 202010305852A CN 111387690 A CN111387690 A CN 111387690A
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- China
- Prior art keywords
- mold
- cavity
- matrix
- bristle tufts
- bristle
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Classifications
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
- A46B3/04—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by mouldable materials, e.g. metals, cellulose derivatives, plastics
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
- A46B3/06—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by welding together bristles made of metal wires or plastic materials
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B5/00—Brush bodies; Handles integral with brushware
- A46B5/0095—Removable or interchangeable brush heads
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B7/00—Bristle carriers arranged in the brush body
- A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D3/00—Preparing, i.e. Manufacturing brush bodies
- A46D3/04—Machines for inserting or fixing bristles in bodies
- A46D3/045—Machines for inserting or fixing bristles in bodies for fixing bristles by fusing or gluing to a body
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/10—For human or animal care
- A46B2200/1066—Toothbrush for cleaning the teeth or dentures
Abstract
The invention relates to the technical field of cleaning appliances, and discloses a brush head and a manufacturing method thereof. Wherein, this brush head includes: a base having a plurality of slots formed therein; a plurality of bristle tufts, each of the plurality of bristle tufts including a plurality of bristle bundles arranged in tufts, the plurality of bristle tufts having an embedded end embedded in the socket and a free end located outside the socket, wherein the embedded end is formed by fusing one ends of the plurality of bristle bundles arranged in tufts and is arranged in a first shape, the embedded end being fixed in the socket so that the bristle tufts are fixed on the base; the neck body, neck body and base member fixed connection, the neck body is used for fixed base member. The application provides a brush head, through fusing the one end of bristle tuft to make it be first shape and arrange, will fuse the holistic fixed to the base body of bristle tuft after again, this makes the more firm that combines between bristle tuft and the base body, thereby makes the brush head in the use, the brush hair is difficult to drop.
Description
Technical Field
The invention relates to the technical field of cleaning appliances, in particular to a brush head and a manufacturing method thereof.
Background
The brush heads of manual and electric toothbrushes include bristles for cleaning the oral cavity. In some toothbrushes, the bristles are organized into bristle tufts contained in a head body that is used to secure the bristle tufts within the head. In the process of manufacturing the brush head, the bristle tufts are firstly inserted into the interior of the head body, and then the head body is fastened into the brush head material to form the final brush head, so that the manufacturing process is complicated and tedious.
Also, in some cases, the head body and bristle tufts may become loose or loose within the brush head, and the bristles are not always fixed at the angle best suited for brushing. When the bristle tufts are subjected to high stresses during use of the brush head, this can result in separation of the head body and the bristle tufts, resulting in the bristles falling out.
Disclosure of Invention
The invention aims to provide a brush head and a manufacturing method thereof, and aims to solve the problems that the manufacturing process of the brush head is complex and bristles are easy to fall off in the prior art.
The invention is thus achieved, a brush head comprising:
a base having a plurality of slots formed therein;
a plurality of bristle tufts, each of the plurality of bristle tufts comprising a plurality of bristle bundles arranged in tufts, a plurality of the bristle tufts having an embedded end embedded in the socket and a free end located outside the socket, wherein the embedded end is formed by fusing one ends of the plurality of bristle bundles arranged in tufts and is arranged in a first shape, the embedded end being fixed within the socket such that the bristle tufts are fixed on the base;
the neck body, the neck body with base member fixed connection, the neck body is used for fixing the base member.
Furthermore, the slot is provided with a slot cavity matched with the embedded end and a slot opening for the free end to extend out, and the opening area of the slot opening is smaller than the cross section area of any horizontal section in the slot cavity.
Further, the matrix is made of a thermoplastic, a thermoplastic elastomer, or a combination comprising at least one of the thermoplastic and the thermoplastic elastomer.
Further, the first shape has a trapezoidal or semicircular cross section in the vertical direction.
Further, the cross section of the first shape along the horizontal direction is a waist circle or an ellipse.
Further, the neck body is provided with a connecting piece for fixing the base body on the neck body, the connecting piece being at least partially embedded in the base body.
Compared with the prior art, the invention mainly has the following beneficial effects:
above-mentioned a brush head that provides, through fusing the one end of bristle tuft to make it be first shape and arrange, again with a plurality of bristle tufts after fusing imbed respectively in the slot on the base body and fixed, wherein, every bristle tuft can be whole fixed to the base body in, this makes the more firm that combines between bristle tuft and the base body, thereby make the brush head in the use, the brush hair is difficult to drop, simultaneously, this brush head simple structure, the production of being convenient for has simplified manufacturing process, has improved the production efficiency of product.
The invention is realized in such a way that a manufacturing method of a brush head comprises the following steps:
molding the neck body in a first mold;
fixing a plurality of one ends of the bristle tufts in a second mold, the second mold having a plurality of cavities therein, one ends of the bristle tufts fitting into the cavities, the other ends of the bristle tufts extending out of the cavities and outside the second mold;
introducing a heat source to heat the ends of the bristle tufts outside the second mold to fuse them to form the embedded end and to cause the embedded end to assume the first shape and be a distance from the second mold greater than 0;
after the bristle tufts fixed in the second mold are subjected to heating treatment and the embedded end is formed, the second mold fixed with the bristle tufts is fixed in a third mold, the matrix is formed by injection molding in the third mold, a mold cavity and a matrix cavity are formed in the third mold, the matrix cavity is communicated with the mold cavity, the second mold is positioned in the mold cavity and matched with the mold cavity, the embedded end is positioned in the matrix cavity, the matrix is formed by injection molding in the matrix cavity, the embedded end is at least partially wrapped by the matrix, the third mold and the second mold are removed after the matrix is solidified, and finally the matrix and the neck body are fixedly connected; or, after the bristle tufts fixed in the second mold are heated and the embedded end is formed, the neck body and the second mold fixed with the bristle tufts are respectively fixed in a fourth mold, and the matrix is formed by injection molding into the fourth mold, the fourth mold is provided with a mold cavity, a matrix cavity and a neck body cavity, the matrix cavity is respectively communicated with the mold cavity and the neck body cavity, the second mold is positioned in the mold cavity and matched with the mold cavity, at least one part of the neck body is positioned in the matrix cavity, the other part of the neck body is positioned in the neck body cavity and matched with the neck body cavity, the embedded end is positioned in the matrix cavity, the matrix is formed by injection molding into the matrix cavity, and the embedded end is at least partially wrapped by the matrix, and finally, removing the fourth mold and the second mold after the matrix is solidified.
Further, prior to fixing an end of a plurality of the bristle tufts within the cavity of the second mold, the end of the bristle tufts for embedding within the cavity is ground to make the head portions of the bristle tufts spherical.
Further, the ends of the bristle tufts located outside the second mold are sheared off and flattened prior to introducing a heat source to heat the ends of the bristle tufts located outside the second mold.
Further, the second mold comprises a bottom mold plate and a middle mold plate; the bottom template is provided with a bottom groove with an upward opening, the middle template is provided with a through hole, the middle template is covered on the bottom template, and the through hole is just opposite to the opening of the bottom groove, so that the bristle tufts are inserted into the through hole and are abutted against the bottom of the bottom groove.
The manufacturing method of the brush head provided by the above is characterized in that a plurality of neck bodies and a plurality of base bodies are molded in an injection molding mode, wherein each base body is fixed with a plurality of bristle tufts in the injection molding process, and finally, the base bodies are respectively fixed on the neck bodies; the manufacturing process is simple, and the production efficiency of the brush head is improved.
Drawings
FIG. 1 is a schematic view of a brush head according to an embodiment of the present invention;
FIG. 2 is an exploded view of a brush head according to an embodiment of the present invention;
FIG. 3 is a schematic view of a base in a toothbrush head according to an embodiment of the present invention;
fig. 4 is a schematic view of the structure of a bristle tuft in a brush head according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method of manufacturing a brush head according to a first embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method of manufacturing a brush head according to a second embodiment of the present invention;
FIG. 7 is a schematic flow chart of a method of manufacturing a brush head according to a third embodiment of the present invention;
FIG. 8 is a schematic flow chart of a method of manufacturing a brush head according to a fourth embodiment of the present invention;
fig. 9 is a schematic view of the configuration of the bristle tufts to be ground in a method of making a head according to an embodiment of the present invention;
fig. 10 is a schematic view of a method of manufacturing a brush head according to an embodiment of the present invention, wherein bristle tufts are embedded in a second mold;
fig. 11 is a schematic view of a method of manufacturing a head according to an embodiment of the invention in which the ends of the bristle tufts are cut flat;
fig. 12 is a schematic view of the heat treatment of the ends of the bristle tufts in a method of making a brush head according to an embodiment of the present invention;
fig. 13 is a schematic view of a method of manufacturing a head according to an embodiment of the present invention for planarizing an embedded end of a bristle tuft;
FIG. 14 is a schematic view of the injection molding of the base in the manufacturing method of a brush head according to the first embodiment of the present invention;
FIG. 15 is a schematic view of the injection molding process of the base in the manufacturing method of a brush head according to a second embodiment of the present invention.
Reference numerals: 1-base, 2-bristle tufts, 3-neck, 4-second, 5-third, 6-fourth, 11-slots, 12-connecting slots, 21-embedded, 22-free, 23-bristle tufts, 31-connectors, 41-middle, 42-bottom, 43-top.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Fig. 1 shows a structural schematic view of a brush head provided by an embodiment of the invention, fig. 2 shows an exploded structural schematic view of the brush head provided by the embodiment of the invention, and the embodiment of the invention is described in detail below with reference to fig. 1 and 2.
A brushhead, comprising:
a base 1, the base 1 having a plurality of slots 11 formed therein;
a plurality of bristle tufts 2, each bristle tuft 2 of the plurality of bristle tufts 2 comprising a plurality of bristle bundles 23 arranged in tufts, the plurality of bristle tufts 2 having an embedded end 21 embedded in the slot 11 and a free end 22 located outside the slot 11, wherein the embedded end 21 is formed by fusing one ends of the plurality of bristle bundles 23 arranged in tufts and is arranged in a first shape, the embedded end 21 being fixed in the slot 11 so that the bristle tuft 2 is fixed on the base body 1;
Above-mentioned a brush head that provides, through fusing the one end of bristle tuft 2 to make it be first shape and arrange, again with a plurality of bristle tufts 2 after fusing imbed slot 11 on the base member 1 respectively and fix, wherein, every bristle tuft 2 can be holistically fixed to in the base member 1, this make the more firm that combines between bristle tuft 2 and the base member 1, thereby make the brush head in the use, the brush hair is difficult to drop, and simultaneously, this brush head simple structure, the production of being convenient for has simplified the manufacturing process, has improved the production efficiency of product.
As an embodiment of the present invention, referring to fig. 3 and 4, the slot 11 has a slot cavity matching with the embedded end 21 and an opening of the slot 11 for extending the free end 22, and the opening area of the slot 11 is smaller than the cross-sectional area of any horizontal section in the slot cavity. After the embedded end 21 of the bristle tuft 2 is embedded into the slot cavity, the opening area of the opening of the slot 11 is smaller than the cross-sectional area of any horizontal section in the slot cavity, so that the embedded end 21 can be clamped in the slot cavity, and the bristle tuft 2 can be firmly fixed on the base body 1 and is not easy to fall off.
Wherein the matrix 1 is made of a thermoplastic, a thermoplastic elastomer, or a combination comprising at least one of the thermoplastic and the thermoplastic elastomer. This results in a matrix 1 with good thermoplasticity and elasticity and at the same time good adhesion to the bristle tufts 2.
Preferably, the first shape has a trapezoidal or semicircular cross section in a vertical direction. This makes the insertion end 21 in the first shape less likely to fall out within the slot 11.
Preferably, the first shape has a cross section in a horizontal direction in a shape of a waist circle or an ellipse. This results in a smoother appearance of the free ends 22 of the bristle tufts 2 above the embedded end 21 in the first shape, while at the same time enabling the bristle tufts 2 to better conform to the teeth during cleaning of the mouth with the brush head.
Of course, the embedded end 21 of the bristle tuft 2 can take many other shapes, as the present invention is not limited in this regard.
As an embodiment of the invention, the neck body 3 is provided with a connecting element 31, the connecting element 31 being used to fix the base body 1 to the neck body 3, the connecting element 31 being at least partially embedded in the base body 1. The connecting member 31 may be made of metal, or may be made of other materials. In addition, the base body 1 is further provided with a connecting groove 12 for the connecting piece 31 to be embedded in, the connecting groove 12 is matched with a part of the connecting piece 31, and when a part of the connecting piece 31 is embedded in the connecting groove 12, the base body 1 and the neck body 3 are fixedly connected.
The fixing manner between the neck body 3 and the base body 1 can adopt one or more of injection molding fixing, insert fixing, heating welding, ultrasonic welding and chemical welding.
The embodiment of the invention also provides a manufacturing method of the brush head, the manufacturing method is used for manufacturing any one of the brush heads, fig. 5 shows a flow chart of the manufacturing method of the brush head provided by the first embodiment of the invention, and the embodiment of the invention is described in detail with reference to fig. 5.
A method of manufacturing a brush head comprising the steps of:
step S100: molding the neck body 3 in a first mold;
specifically, the plurality of neck bodies 3 are molded in the first mold by means of injection molding.
Step S200: fixing one end of a plurality of bristle tufts 2 into a second mold 4;
specifically, the second mold 4 has a plurality of cavities therein, one end of the bristle tufts 2 is fitted into the cavities, the other end of the bristle tufts 2 protrudes out of the cavities and is located outside the second mold 4, and the second mold 4 is used for fixing the bristle tufts 2 so as to smooth and fuse the bristle tufts 2.
Step S300: introducing a heat source to heat the ends of the bristle tufts 2 outside the second mold 4 to fuse them to form an embedded end 21;
specifically, in the fusing process, the fused embedded end 21 is subjected to shape shaping by means of a leveling tool or device, and the embedded end 21 is made to be in the first shape, and the distance between the embedded end 21 and the second mold 4 is greater than 0.
Step S400: fixing the second mold 4 fixed with the bristle tufts 2 in the third mold 5, then injecting and molding the base body 1 into the third mold 5, removing the third mold 5 and the second mold 4 after the base body 1 is solidified, and finally fixedly connecting the base body 1 with the neck body 3;
specifically, after the bristle tufts 2 fixed in the second mold 4 are heated and the embedded end 21 is formed, the second mold 4 with the bristle tufts 2 fixed therein is fixed in the third mold 5, the matrix 1 is injection-molded into the third mold 5, a mold cavity and a matrix cavity are opened in the third mold 5, the matrix cavity is communicated with the mold cavity, the second mold 4 is located in the mold cavity and is matched with the mold cavity, the embedded end 21 is located in the matrix cavity, the matrix 1 is injection-molded into the matrix cavity, the embedded end 21 is at least partially wrapped by the matrix 1, the third mold 5 and the second mold 4 are removed after the matrix 1 is solidified, and finally the matrix 1 is fixedly connected with the neck body 3.
In this embodiment, the fixing connection between the base 1 and the neck 3 may be one or more of insert fixing, heat welding, ultrasonic welding and chemical welding.
Referring to fig. 6, fig. 6 is a schematic flow chart of a manufacturing method of a brush head according to a second embodiment of the invention. A second embodiment of the present invention provides a method for manufacturing a brush head, comprising the steps of:
step S100: molding the neck body 3 in a first mold;
specifically, the plurality of neck bodies 3 are molded in the first mold by means of injection molding.
Step S200: fixing one end of a plurality of bristle tufts 2 into a second mold 4;
in particular, the second mold 4 has a plurality of cavities therein, into which one end of the bristle tufts 2 fits, the other end of the bristle tufts 2 protruding out of the cavities and outside the second mold 4, the second mold 4 serving to fix the free ends 22 of the bristle tufts 2, so as to facilitate the flattening of the other end of the bristle tufts 2, which are then fused to form the embedded end 21.
Step S300: introducing a heat source to heat the ends of the bristle tufts 2 outside the second mold 4 to fuse them to form an embedded end 21;
specifically, in the fusing process, the fused embedded end 21 is subjected to shape shaping by means of a leveling tool or device, and the embedded end 21 is made to be in the first shape, and the distance between the embedded end 21 and the second mold 4 is greater than 0.
Step S500: respectively fixing the neck body 3 and the second mold 4 fixed with the bristle tufts 2 into a fourth mold 6, then injecting the fourth mold 6 into the matrix 1, and finally removing the fourth mold 6 and the second mold 4 after the matrix 1 is solidified;
specifically, after the bristle tufts 2 held in the second mold 4 are subjected to a heating process and the embedded end 21 is formed, the neck body 3 and the second mold 4 to which the bristle tufts 2 are fixed in a fourth mold 6, then injecting the plastic into a fourth mould 6 to form a matrix 1, wherein the fourth mould 6 is provided with a mould cavity, a matrix cavity and a neck cavity, the matrix cavity is respectively communicated with the mould cavity and the neck cavity, a second mould 4 is positioned in the mould cavity and is matched with the mould cavity, at least one part of the neck body 3 is positioned in the matrix cavity, the other part of the neck body 3 is positioned in the neck cavity and is matched with the neck cavity, an embedding end 21 is positioned in the matrix cavity, and the matrix 1 is formed by injection molding in the matrix cavity, and the embedded end 21 is at least partially wrapped by the substrate 1, and finally the fourth mold 6 and the second mold 4 are removed after the substrate 1 is solidified.
In the embodiment, the base body 1 and the neck body 3 are fixed in an injection molding fixing mode, and the embedded end 21 of the bristle tuft 2 and a part of the neck body 3 are embedded into the base body cavity in the process of injection molding the base body 1 by the fourth mold 6, so that the bristle tuft 2 and the neck body 3 can be fixed on the base body 1 together after the base body 1 is formed by injection molding, the process flow and steps are simplified, and the production efficiency is improved.
The manufacturing method of the brush head provided by the above is to mold a plurality of neck bodies 3 and a plurality of base bodies 1 by adopting an injection molding mode, wherein each base body 1 is fixed with a plurality of bristle tufts 2 in the injection molding process, and finally, the base bodies 1 are respectively fixed on the neck bodies 3; the manufacturing process is simple, and the production efficiency of the brush head is improved.
A third embodiment of the present invention is provided based on the first embodiment or the second embodiment of the present invention. Fig. 7 is a schematic flow chart illustrating a manufacturing method of a brush head according to a third embodiment of the present invention, which further includes the following steps before step S200 based on the first embodiment of the present invention:
step S101: grinding one end of the bristle tuft 2 to be embedded in the second mold 4 so that the head of the bristle bundle 23 of the bristle tuft 2 is spherical;
specifically, adopt the instrument of polishing or the equipment of polishing to polish the one end of bristle tuft 2 for the head of a plurality of bristle bundles in the bristle tuft 2 is spherical, is using this brush head clean oral cavity's in-process, and spherical bristle bundle head can make the better laminating tooth of bristle tuft 2, and the cleanness that clears up simultaneously is cleaner, also be unlikely to cause the injury to the oral cavity.
A fourth embodiment of the present invention is provided based on the first embodiment or the second embodiment of the present invention. Fig. 8 is a schematic flow chart illustrating a manufacturing method of a brush head according to a fourth embodiment of the present invention, which further includes the following steps before step S300 based on the first embodiment of the present invention:
step S201: shearing the ends of the bristle tufts 2 located outside the second mold 4 flat;
in particular, in order to facilitate the heat treatment of the ends of the bristle tufts 2 located outside the second mold 4, it is necessary to shear-flatten the ends of the bristle tufts 2; at the same time, this allows the cavities in the second mold 4, which are adapted to the free ends 22 of the bristle tufts 2, to have different heights and shapes, due to the different height shapes of the portions of the bristle tufts 2 located on the brush head; after one end of the bristle tuft 2 has been fully inserted into the cavity, the other end of the bristle tuft 2 needs to be sheared to keep it flat.
Figures 9-15 illustrate in detail the steps of a method of manufacturing a brush head provided by an embodiment of the present invention.
Referring to fig. 9, before fixing one end of the bristle tufts 2 in the cavity of the second mold 4, one end of the plurality of bristle tufts 2 is ground using a grinding apparatus so that the ends of the bristle tufts 2 are spherical.
Referring to fig. 10, after the bristle tufts 2 have been ground, one end of the ground bristle tufts 2 is inserted into the second mold 4. The second mold 4 includes a bottom mold plate 42 and a middle mold plate 41; the bottom template 42 is provided with a bottom groove with an upward opening, the middle template 41 is provided with a through hole, the middle template 41 covers the bottom template 42, and the through hole is opposite to the opening of the bottom groove, so that the bristle cluster 2 is inserted into the through hole and is abutted against the bottom of the bottom groove. Meanwhile, in order to facilitate the insertion of the bristle tufts 2, the cross-sectional area at the opening of the through-hole of the middle mold plate 41 is larger than the cross-sectional area inside the through-hole.
Referring to fig. 11, after one end of the bristle tufts 2 is inserted into the second mold 4, the other end of the bristle tufts 2, which is located outside the second mold 4, is cut flat using a cutting tool or a cutting device.
In some embodiments, the second mold 4 further comprises an upper template 43; the upper template 43 is arranged above the middle template 41, the upper template 43 is provided with a jack which is opposite to the position of the through hole on the middle template 41, after the upper template 43 is covered, one end of the bristle cluster 2 extends out of the jack, then the bristle cluster 2 above the upper template 43 is cut and leveled by adopting a cutting device and along the upper surface of the upper template 43, and after the cutting is finished, the upper template 43 is removed.
Referring to fig. 12, the flattened bristle tufts 2 are heated by a heated plate or other heating device to fuse the extensions together to form the embedded end 21.
Referring to fig. 13, the embedded end 21 of the bristle tuft 2 is reshaped in shape and size using a reshaping tool or device such that the embedded end 21 is arranged in the first shape while the distance D between the embedded end 21 and the middle mold plate 41 is greater than 0.
Referring to fig. 14, fig. 14 is a schematic view illustrating an injection molding process of a base 1 in a manufacturing method of a brush head according to a first embodiment of the present invention. Inserting the second mold 4 with the shaped bristle tufts 2 fixed thereto into a mold cavity in the third mold 5, and arranging an insertion end 21 located outside the second mold 4 into a matrix cavity in the third mold 5; then, injection molding is carried out in the matrix cavity to form the matrix 1, after the matrix 1 in the matrix cavity is solidified, the matrix 1 is abutted against the surface of the second mold 4, and the distance D between the embedded end 21 and the middle mold plate 41 is larger than 0, so that the embedded end 21 can be wrapped in the slot 11 in the matrix 1 by the matrix 1, and the embedded end 21 can be firmly fixed in the slot 11 in a fixing mode and is not easy to loosen, so that the bristle tufts 2 are effectively prevented from falling off; then the third mold 5 and the second mold 4 are sequentially taken down to obtain a combination body of the base body 1 and the plurality of bristle bundles 23, and finally the combination body is fixedly connected with the neck body 3 in an embedding and fixing mode, so that a complete brush head is obtained.
Referring to fig. 15, fig. 15 is a schematic view illustrating an injection molding process of a base 1 in a manufacturing method of a brush head according to a second embodiment of the present invention. Inserting the second mold 4 with the shaped bristle tufts 2 fixed thereto into a mold cavity in the fourth mold 6, and arranging an insertion end 21 located outside the second mold 4 into a matrix cavity in the fourth mold 6; then embedding a part of the neck body 3 into the neck body cavity in the fourth mold 6, and arranging another part of the neck body 3 in the base body cavity in the fourth mold 6; then, injection molding is carried out in the matrix cavity to form the matrix 1, after the matrix 1 in the matrix cavity is solidified, the matrix 1 and a part of the neck body 3 are embedded and fixed, meanwhile, the matrix 1 is abutted against the surface of the second mold 4, and the distance D between the embedded end 21 and the middle mold plate 41 is larger than 0, so that the embedded end 21 can be wrapped in the slot 11 in the matrix 1 by the matrix 1, and the embedded end 21 can be firmly fixed in the slot 11 in a fixing mode and is not easy to loosen, so that the bristle tufts 2 are effectively prevented from falling off; and finally, sequentially taking down the fourth die 6 and the second die 4 to obtain the complete brush head.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A brushhead, comprising:
a base having a plurality of slots formed therein;
a plurality of bristle tufts, each of the plurality of bristle tufts comprising a plurality of bristle bundles arranged in tufts, a plurality of the bristle tufts having an embedded end embedded in the socket and a free end located outside the socket, wherein the embedded end is formed by fusing one ends of the plurality of bristle bundles arranged in tufts and is arranged in a first shape, the embedded end being fixed within the socket such that the bristle tufts are fixed on the base;
the neck body, the neck body with base member fixed connection, the neck body is used for fixing the base member.
2. The brushhead of claim 1, wherein the socket has a socket cavity adapted to the embedded end and a socket opening through which the free end extends, the opening area of the socket opening being less than the cross-sectional area of any horizontal cross-section within the socket cavity.
3. The brush head of claim 1 wherein the base is made of a thermoplastic, a thermoplastic elastomer, or a combination comprising at least one of the thermoplastic and the thermoplastic elastomer.
4. A brush head according to claim 1 wherein the first shape is trapezoidal or semi-circular in vertical cross-section.
5. A brush head according to claim 1 wherein the first shape is oval or elliptical in horizontal cross-section.
6. A head according to any one of claims 1 to 5 characterised in that the neck body is provided with a connecting member for securing the base body to the neck body, the connecting member being at least partially embedded in the base body.
7. A method of manufacturing a brush head for use in manufacturing a brush head according to any of claims 1 to 6, the method comprising:
molding the neck body in a first mold;
fixing a plurality of one ends of the bristle tufts in a second mold, the second mold having a plurality of cavities therein, one ends of the bristle tufts fitting into the cavities, the other ends of the bristle tufts extending out of the cavities and outside the second mold;
introducing a heat source to heat the ends of the bristle tufts outside the second mold to fuse them to form the embedded end and to cause the embedded end to assume the first shape and be a distance from the second mold greater than 0;
after the bristle tufts fixed in the second mold are subjected to heating treatment and the embedded end is formed, the second mold fixed with the bristle tufts is fixed in a third mold, the matrix is formed by injection molding in the third mold, a mold cavity and a matrix cavity are formed in the third mold, the matrix cavity is communicated with the mold cavity, the second mold is positioned in the mold cavity and matched with the mold cavity, the embedded end is positioned in the matrix cavity, the matrix is formed by injection molding in the matrix cavity, the embedded end is at least partially wrapped by the matrix, the third mold and the second mold are removed after the matrix is solidified, and finally the matrix and the neck body are fixedly connected; or, after the bristle tufts fixed in the second mold are heated and the embedded end is formed, the neck body and the second mold fixed with the bristle tufts are respectively fixed in a fourth mold, and the matrix is formed by injection molding into the fourth mold, the fourth mold is provided with a mold cavity, a matrix cavity and a neck body cavity, the matrix cavity is respectively communicated with the mold cavity and the neck body cavity, the second mold is positioned in the mold cavity and matched with the mold cavity, at least one part of the neck body is positioned in the matrix cavity, the other part of the neck body is positioned in the neck body cavity and matched with the neck body cavity, the embedded end is positioned in the matrix cavity, the matrix is formed by injection molding into the matrix cavity, and the embedded end is at least partially wrapped by the matrix, and finally, removing the fourth mold and the second mold after the matrix is solidified.
8. The method of manufacturing a brush head according to claim 7, wherein before fixing one end of a plurality of the bristle tufts in the cavity of the second mold, one end of the bristle tufts fitted in the cavity is ground so that the head portions of the bristle bundles of the bristle tufts are spherical.
9. The method of claim 7 wherein the ends of the bristle tufts that are outside the second mold are sheared flat prior to introducing a heat source to heat the ends of the bristle tufts that are outside the second mold.
10. The method of manufacturing a brush head according to claim 7, wherein the second mold comprises a bottom mold plate and a middle mold plate; the bottom template is provided with a bottom groove with an upward opening, the middle template is provided with a through hole, the middle template is covered on the bottom template, and the through hole is just opposite to the opening of the bottom groove, so that the bristle tufts are inserted into the through hole and are abutted against the bottom of the bottom groove.
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| CN202010305852.7A CN111387690A (en) | 2020-04-17 | 2020-04-17 | Brush head and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114145560A (en) * | 2021-12-08 | 2022-03-08 | 深圳市一晤未来科技有限公司 | Preparation method of brush head component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114145560A (en) * | 2021-12-08 | 2022-03-08 | 深圳市一晤未来科技有限公司 | Preparation method of brush head component |
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