WO2024007571A1 - 用于牙刷头生产的刷头治具及牙刷头的制造方法 - Google Patents

用于牙刷头生产的刷头治具及牙刷头的制造方法 Download PDF

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Publication number
WO2024007571A1
WO2024007571A1 PCT/CN2023/072740 CN2023072740W WO2024007571A1 WO 2024007571 A1 WO2024007571 A1 WO 2024007571A1 CN 2023072740 W CN2023072740 W CN 2023072740W WO 2024007571 A1 WO2024007571 A1 WO 2024007571A1
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WO
WIPO (PCT)
Prior art keywords
brush head
fixture
bristles
positioning hole
holding part
Prior art date
Application number
PCT/CN2023/072740
Other languages
English (en)
French (fr)
Inventor
阮平
刘小甲
郭秋凤
张志强
陈映升
崔淑玲
葛宝昌
Original Assignee
赫比（厦门）精密塑胶制品有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 赫比（厦门）精密塑胶制品有限公司 filed Critical 赫比（厦门）精密塑胶制品有限公司
Priority to PCT/CN2023/072740 priority Critical patent/WO2024007571A1/zh
Publication of WO2024007571A1 publication Critical patent/WO2024007571A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds

Definitions

  • the present application relates to the technical field of fixtures, and specifically to a brush head fixture used for toothbrush head production and a manufacturing method of the toothbrush head.
  • a toothbrush is a cleaning tool that people need to use every day. It generally consists of a toothbrush head and a toothbrush handle. Among them, the toothbrush head generally includes a brush head body and bristles. In order to improve the experience of using a toothbrush, some toothbrush heads add a soft coating layer to the brush head body, or add components such as a tongue brush. During the process of conceiving and implementing this application, the inventor found that there are at least the following problems: in order to manufacture different components of the toothbrush head, a variety of corresponding jigs are needed, which makes the manufacturing process of the toothbrush head more cumbersome, and different jigs and molds There may be dimensional differences, and dimensional errors may easily occur between different components of the toothbrush head manufactured.
  • this application provides a brush head fixture for toothbrush head production and a manufacturing method of the toothbrush head.
  • the structural design of the brush head fixture can participate in the entire process of toothbrush head production, simplifying the production process of the toothbrush head. , improves the production efficiency of toothbrush heads and ensures precise dimensional matching between the components in the manufactured toothbrush heads.
  • the present application provides a brush head fixture for the production of toothbrush heads.
  • the toothbrush head includes a brush head body, bristles and a coating layer.
  • the brush head body includes one or more holding parts. One end of the bristles is fixed by the holding part, and the coating layer covers at least the part of the brush head body away from the free end of the bristles.
  • the brush head fixture includes a fixture body and a bristle accommodating part.
  • the bristle accommodating portion is provided on one side of the jig body, and the bristle accommodating portion is used to accommodate the free ends of the implanted bristles during the manufacturing process of the toothbrush head;
  • the sealing material surface is located on the side of the jig body facing away from the bristle accommodating part. The sealing material surface is used to limit the material of the coating layer from entering the coating layer when forming the coating layer.
  • the one or more positioning holes penetrate the wall of the jig body between the side of the sealing surface and the side of the bristle accommodating part.
  • the one or more positioning holes are used for molding.
  • the one or more retaining parts provide a partial wall of the mold cavity, and position the one or more retaining parts resulting from the molding.
  • the positioning hole includes a first positioning hole and a second positioning hole
  • the first positioning hole is used to provide a partial wall of the mold cavity when forming the first holding part of the holding part, and positioning
  • the formed first holding part and the first positioning holes are connected with each other, and the second positioning holes are located on the peripheral side of the first positioning hole for forming the second positioning hole in the holding part.
  • the retaining part provides a partial wall of the mold cavity, and the second retaining part obtained by positioning and molding, and the second positioning holes are not connected with each other.
  • a first opening is provided at one end of the hole structure after the first positioning holes are interconnected, and a second opening is provided in the bristle accommodating portion corresponding to the first opening, and the first opening is connected to the first opening.
  • the second opening is connected.
  • a partial area of the sealing material surface is used to provide a partial wall of the cavity of the connecting member when the holding part is formed, and the connecting part is used to connect the first holding part and the third holding part in the holding part.
  • the end surface of the side of the jig body facing away from the bristle accommodating part is concave to form the sealing surface; or, the side of the jig body facing away from the bristle accommodating part is concave.
  • the end surface is convex to form the sealing surface; or, a part of the plane of the jig body facing away from the bristle accommodating part is the sealing surface.
  • the brush head fixture is made of metal or hard plastic.
  • this application also provides a method for manufacturing a toothbrush head, which includes the following steps: S201: Provide the brush head fixture as mentioned above; S202: Fix the brush head fixture in the first mold, so that the wall of the positioning hole of the brush head fixture cooperates with the first mold to form a first mold cavity. In the first mold cavity The brush head body is formed by injection molding, and the holding portion on the brush head body corresponds to and is positioned in the positioning hole; S203: Remove the brush head fixture and the brush head body from the first mold and fix them in the hair transplanting fixture.
  • the wall portion of the positioning hole of the brush head fixture constitutes a portion of the first mold cavity corresponding to the outer wall of the holding portion.
  • the step S203 includes: Pass one end of the bristle through the holding part located in the positioning hole from the side of the sealing surface through the bristle transplanting fixture, and extend into the bristle accommodating part; The end of the bristles located on the sealing surface side is processed so that the bristles are fixed by the holding part.
  • step S204 it also includes: Remove the assembly of the brush head fixture and the brush head body forming the coating layer from the second mold; The brush head body forming the coating layer is separated from the brush head fixture.
  • the material injected into the first cavity is a hard plastic precursor
  • the material injected into the second cavity is a soft plastic precursor
  • the brush head fixture of the present application is used for the production of toothbrush heads.
  • the toothbrush head includes a brush head body, bristles and a coating layer.
  • the brush head body includes one or more holding parts. One end of the bristles is fixed by the holding part.
  • the coating layer has at least Covering the part of the brush head body away from the free end of the bristles, the brush head fixture includes a fixture body, a bristle accommodating part, a sealing surface and one or more positioning holes; a bristle accommodating part is provided on one side of the fixture body, The bristle accommodating part is used to accommodate the free ends of the implanted bristles during the process of manufacturing the toothbrush head; the sealing surface is located on the side of the fixture body facing away from the bristle accommodating part, and the sealing surface is used to form the package.
  • the brush head fixture of the present application also includes parts corresponding to the brush head body, bristles, and coating layers.
  • One brush head fixture can be used to participate in the entire process of toothbrush head production, simplifying the production process of the toothbrush head, and improving the quality of the toothbrush head. to improve production efficiency and ensure precise dimensional matching between the components in the manufactured toothbrush head.
  • the manufacturing method of the toothbrush head of the present application includes: providing a brush head fixture; fixing the brush head fixture in a first mold, so that the wall of the positioning hole of the brush head fixture cooperates with the first mold to form a first mold cavity , the brush head body is formed by injection molding in the first mold cavity, and the holding part on the brush head body corresponds to the positioning hole and is positioned in the positioning hole; the brush head fixture and the brush head body are removed from the first mold and fixed on In the hair transplanting fixture, the bristles are passed through the holding part and fixed by the hair transplanting fixture, so that the free ends of the bristles are received in the bristle receiving part; the assembly of the brush head fixture and the brush head body after hair transplantation is removed from the hair transplanting fixture Move it out and fix it in the second mold, so that a second cavity is formed between the sealing surface and the second mold, and the coating layer is formed by injection molding in the second cavity.
  • the brush head jig of the present application participates in the entire process of toothbrush head production, simplifies
  • Figure 1 is a schematic structural diagram of a toothbrush head according to the first embodiment of the present application.
  • Figure 2 is a schematic structural diagram of the brush head body according to the first embodiment of the present application.
  • Figure 3 is one of the structural schematic diagrams of a toothbrush fixture according to the first embodiment of the present application.
  • Figure 4 is the second structural schematic diagram of the toothbrush fixture according to the first embodiment of the present application.
  • Figure 5 is a schematic diagram of the combination of the brush head body and the toothbrush fixture according to the first embodiment of the present application.
  • Figure 6 is a schematic diagram of the combination of a toothbrush head with bristles and a brush head fixture according to the first embodiment of the present application.
  • Figure 7 is a schematic diagram of the combination of a toothbrush head with a wrapping layer and a brush head fixture according to the first embodiment of the present application.
  • Figure 8 is a schematic structural diagram of another sealing material surface according to the first embodiment of the present application.
  • Figure 9 is a schematic structural diagram of the brush head body according to the second embodiment of the present application.
  • Figure 10 is one of the structural schematic diagrams of a toothbrush fixture according to the second embodiment of the present application.
  • Figure 11 is the second structural schematic diagram of a toothbrush fixture according to the second embodiment of the present application.
  • Figure 12 is a schematic diagram of the combination of the brush head body and the toothbrush fixture according to the second embodiment of the present application.
  • Figure 13 is a schematic flowchart of a method for manufacturing a toothbrush head according to the third embodiment of the present application.
  • A, B or C or "A, B and/or C” means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C” . Exceptions to this definition occur only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some manner.
  • FIG. 1 is a schematic structural diagram of a toothbrush head according to a first embodiment of the present application.
  • Figure 2 is a schematic structural diagram of the brush head body according to the first embodiment of the present application.
  • the toothbrush head includes a brush head body 10, bristles 11 and a coating layer 12.
  • the brush head body 10 includes one or more holding parts 13. One end of the bristles 11 is fixed by the holding part 13, and the coating layer
  • the layer 12 covers at least the part of the brush head body 10 away from the free end of the bristles 11 .
  • the brush head fixture used for toothbrush head production can be used to produce the toothbrush head with the above structure.
  • the brush head fixture includes a fixture body 30, a bristle accommodating part 31, Sealing material surface 32 and one or more positioning holes 33.
  • a bristle accommodating portion 31 is provided on one side of the jig body 30, and the bristle accommodating portion 31 is used to accommodate the free ends of the implanted bristles 11 during the manufacturing process of the toothbrush head.
  • the sealing surface 32 is located on the side of the jig body 30 facing away from the bristle accommodating part 31 .
  • the sealing surface 32 is used to restrict the material of the coating layer 12 from entering the bristle accommodating part 31 when the coating layer 12 is formed.
  • One or more positioning holes 33 penetrate the wall of the jig body 30 between the side where the sealing surface 32 is located and the side where the bristle accommodating part 31 is located.
  • the one or more positioning holes 33 are used to provide the necessary support when forming the holding part 13 . Part of the wall of the mold cavity, and the retaining portion 13 obtained by positioning and molding.
  • the brush head fixture is made of metal material or hard plastic, which has high hardness and strength. When placed in the mold cavity for molding the toothbrush head, it can withstand the large injection pressure in the mold cavity. It remains dimensionally stable and can be reused.
  • Figure 5(a) is a schematic diagram of one side of the brush head body and the brush head fixture.
  • Figure 5(b) is a schematic diagram of the other side of the combination of the brush head body and the brush head fixture.
  • the positioning hole 33 in the brush head fixture corresponds to the holding portion 13 .
  • the positioning hole 33 penetrates the wall of the jig body 30 between the sealing surface 32 and the bristle accommodating part 31.
  • the positioning hole 33 is used to provide a partial wall of the cavity when the holding part 13 is molded, and the injection molding material is This mold cavity can form the retaining part 13 .
  • the positioning holes 33 are also used to position the molded holding portion 13 .
  • the positioning hole 33 is used to fix the molded retaining part 13 in the positioning hole 33 after the brush head body 10 is first formed to prevent the position of the retaining part 13 from moving during the manufacturing process and reduce assembly errors, so that subsequent manufacturing processes can proceed smoothly.
  • the depth of the positioning hole 33 can be selected to be smaller than the height of the holding portion 13 so that the holding portion 13, the bristles 11 and the wrapping layer 12 in the toothbrush head are integrally formed.
  • the holding part 13 includes a first holding part 131 and a second holding part 133.
  • the first holding part 131 is located at the middle and lower part of the brush head body 10 and is connected as a whole.
  • the second holding part 133 is located at the brush head.
  • the peripheral sides of the body 10 are independent of each other, and the second holding part 133 and the integrally connected first holding part 131 are connected through a connecting piece 132 .
  • the positioning hole 33 includes a first positioning hole 331 and a second positioning hole 332.
  • the first positioning hole 331 corresponds to the first holding part 131, and the first positioning holes 331 are connected with each other.
  • the second positioning hole 332 is located at The peripheral side of the first positioning hole 331 corresponds to the second holding part 133 , and the second positioning holes 332 are not connected with each other.
  • the positioning hole 33 can provide a partial wall of the mold cavity for molding the first holding part 131 and the second holding part 133 respectively during the molding process of the toothbrush head.
  • the positioning hole 33 cooperates with the mold for molding the brush head body to form a cavity. Through internal injection molding, the first holding part 131 and the second holding part 133 can be obtained.
  • the second holding part 133 and the first holding part 131 are connected through a connecting piece 132 , and part of the wall of the sealing material surface is also used to provide part of the wall of the cavity of the connecting part 132 when the holding part 13 is formed.
  • the connecting piece 132 is located between the first holding part 131 and the second holding part 133 . Since the first holding part 131 and the second holding part 133 both correspond to the positioning holes 33 one-to-one, the positioning holes 33 can respectively provide mold cavities for forming the first holding part 131 and the second holding part 133 during the forming process of the toothbrush head. Partial wall.
  • the positioning hole 33 penetrates the sealing material surface 32, and the sealing material surface 32 provides a partial wall of the cavity during the molding process of the connector 132. Injection molding is performed in the cavity formed by the sealing material surface 32 and the mold for forming the brush head body. Connector 132 is obtained simultaneously.
  • a first opening is provided at one end of the hole structure after the first positioning holes 331 are connected to each other, and a second opening is provided at a side of the bristle accommodating portion 31 corresponding to the first opening, and the first opening is connected with the second opening.
  • This design can be used to integrate the brush head body and the brush handle, which facilitates the manufacturing of the brush head fixture and facilitates the smooth demoulding of the manufactured toothbrush head and brush head fixture.
  • Figure 6(a) is a schematic diagram of one side of a toothbrush head with bristles and a brush head fixture
  • Figure 6(b) is a toothbrush head with bristles and a brush head fixture. Schematic diagram of the other side combination.
  • the bristle accommodating part 31 of the brush head fixture is used for the hair transplantation process and the second molding of the wrapping layer 12
  • the free ends of the bristles 11 are accommodated in the bristle accommodating part 31 to prevent the bristle transplanting fixture or the second mold from pressing. Injure or burn the bristles11.
  • the shape of the bristle receiving portion 31 can be a cavity formed inwardly on one side of the brush head fixture, and the bristle 11 is received in the cavity.
  • one side of the jig body 30 can also be a flat surface, and the brush head jig is placed in a mold used for the hair transplantation process (hereinafter referred to as the hair transplanting jig), or a mold for the second molding of the wrapping layer 12 (
  • the hair transplanting jig a mold used for the hair transplantation process
  • the second mold referred to as the second mold
  • the plane can be used as a bristle receiving part and a hair transplanting fixture or a second mold to form a cavity for accommodating the bristle.
  • Figure 7(a) is a schematic diagram of one side of the toothbrush head with a wrapping layer and the brush head fixture.
  • Figure 7(b) is a schematic diagram of the other side of the combination of the toothbrush head with the wrapping layer and the brush head fixture.
  • the sealing material surface 32 of the brush head fixture is injection molded by the soft material coating layer 12, the soft material is wrapped up to this surface, which plays a sealing role and prevents the soft material from entering the bristle accommodating part 31.
  • the shape of the area where the sealing surface 32 is located matches the shape of the toothbrush head.
  • the end surface of the jig body 30 facing away from the bristle accommodating part 31 is concave to form the sealing surface 32 .
  • the sealing surface 32 it is convenient for the sealing surface 32 to cooperate with the second mold to form a cavity for molding the wrapping layer 12 .
  • the side end surface of the jig body 30 facing away from the bristle accommodating portion 31 protrudes outward to form a sealing surface 32 .
  • the sealing surface 32 it is convenient for the sealing surface 32 to fit into the corresponding position in the second mold to form a cavity for molding the wrapping layer 12 .
  • a portion of the jig body 30 facing away from the bristle accommodating portion 31 is the sealing surface 32 . In this way, the manufacturing of the toothbrush head is facilitated.
  • the brush head fixture used for the production of toothbrush heads according to the embodiment of the present application.
  • the toothbrush head includes a brush head body, bristles and a coating layer.
  • the brush head body includes one or more holding parts. One end of the bristles is fixed by the holding part, and the coating layer The layer at least covers the part of the brush head body away from the free end of the bristles.
  • the brush head fixture includes a fixture body, a bristle accommodating part, a sealing surface and one or more positioning holes; one side of the fixture body is provided with a bristle accommodating part.
  • the bristle accommodating part is used to accommodate the free ends of the implanted bristles during the manufacturing process of the toothbrush head; the sealing surface is located on the side of the jig body facing away from the bristle accommodating part, and the sealing surface is used to When forming the coating layer, the material of the coating layer is restricted from entering the bristle accommodating part; the positioning hole penetrates the wall of the jig body between the sealing material surface and the bristle accommodating part, and the positioning hole is used to provide the shape when forming the retaining part. Part of the wall of the cavity, and the retaining portion obtained by positioning and molding.
  • the brush head fixture includes parts corresponding to the brush head body, bristles, and coating layers.
  • One brush head fixture can be used to participate in the entire process of toothbrush head production, simplifying the production process of the toothbrush head and improving the quality of the toothbrush head. production efficiency and ensure precise dimensional fit between components in manufactured toothbrush heads.
  • FIG. 9 is a schematic structural diagram of a brush head body according to a second embodiment of the present application.
  • the brush head body 10 of this embodiment includes a holding part 13 , and a plurality of fixing holes 134 are provided in the holding part 13 .
  • the coating layer covers at least the part of the brush head body 10 away from the free end of the bristles.
  • the brush head fixture used for toothbrush head production can be used to produce toothbrush heads with the brush head body 10 having the above structure.
  • the brush head fixture includes a fixture body 30, The bristle receiving part 31, the sealing surface 32 and a positioning hole 33.
  • a bristle accommodating portion 31 is provided on one side of the jig body 30, and the bristle accommodating portion 31 is used to accommodate the free ends of the implanted bristles 11 during the manufacturing process of the toothbrush head.
  • the sealing surface 32 is located on the side of the jig body 30 facing away from the bristle accommodating part 31 .
  • the sealing surface 32 is used to restrict the material of the coating layer 12 from entering the bristle accommodating part 31 when the coating layer 12 is formed.
  • the positioning hole 33 penetrates the wall of the jig body 30 between the side where the sealing surface 32 is located and the side where the bristle accommodating part 31 is located.
  • the positioning hole 33 is used to provide a partial wall of the cavity when the retaining part 13 is formed, and, The molded holding portion 13 is positioned.
  • the sealing surface 32 is an area surrounding the positioning hole 33 on the side of the jig body 30 facing away from the bristle receiving portion 31 .
  • the brush head fixture is made of metal material or hard plastic, which has high hardness and strength. When placed in the mold cavity for molding the toothbrush head, it can withstand the large injection pressure in the mold cavity. It remains dimensionally stable and can be reused.
  • Figure 12(a) is a schematic diagram of one side of the brush head body and the brush head fixture.
  • Figure 12(b) is a schematic diagram of the other side of the combination of the brush head body and the brush head fixture.
  • the positioning hole 33 in the brush head fixture corresponds to the holding portion 13 .
  • the positioning hole 33 penetrates the wall of the jig body 30 between the side where the sealing surface 32 is located and the side where the bristle accommodating part 31 is located.
  • the positioning hole 33 is used to provide a partial wall of the mold cavity when the retaining part 13 is formed.
  • the holding part 13 can be molded by injecting the molding material into the cavity.
  • the positioning holes 33 are also used to position the molded holding portion 13 .
  • the positioning hole 33 is formed after the brush head body 10 is formed for the first time. Part of the outer wall of the holding part 13 cooperates with the positioning hole 33 of the brush head fixture to fix the formed holding part 13 in the positioning hole 33 to prevent the holding part 13 from being manufactured. The position moves during the process, reducing assembly errors so that subsequent manufacturing processes can proceed smoothly. At the same time, the fixing hole 134 in the holding part 13 is also positioned.
  • the bristle accommodating part 31 of the brush head fixture is used for the hair transplanting process and the second molding of the wrapping layer.
  • the free ends of the bristles are accommodated in the bristle accommodating part 31 to prevent the bristle transplanting fixture or the second mold from being crushed or damaged.
  • the shape of the bristle receiving portion 31 can be a cavity formed inwardly on one side of the jig body 30, and the bristle is received in the cavity.
  • one side of the jig body 30 can also be a flat surface, and the brush head jig is placed in a mold used for hair transplantation (hereinafter referred to as the hair transplantation jig), or a mold for the second molding of the wrapping layer (hereinafter referred to as the hair transplantation jig).
  • the plane can be used as a bristle accommodating part and the hair transplanting fixture or the second mold to form a cavity for accommodating the bristle.
  • the matching method of the brush head fixture, the brush head body, and the hair transplanting fixture is similar to the first embodiment, and will not be described again.
  • the sealing surface 32 of the brush head fixture is injection molded with the soft material coating layer, the soft material is wrapped up to this surface, which plays a sealing role and prevents the soft material from entering the bristle accommodating part 31.
  • the sealing surface 32 is the area surrounding the positioning hole 33 on the side of the jig body 30 facing away from the bristle receiving portion 31 .
  • This area can be a flat surface, a concave surface, or a convex surface.
  • the sealing material surface 32 needs to be easily fitted with the corresponding position in the second mold to form a cavity for molding the wrapping layer.
  • the matching method between the brush head fixture, the brush head body and the second mold is similar to that in the first embodiment, and will not be described again.
  • the brush head fixture used in the production of toothbrush heads includes a brush head body, bristles and a coating layer.
  • the brush head body includes a holding part. One end of the bristles is fixed by the holding part.
  • the coating layer at least covers Covering the part of the brush head body away from the free end of the bristles, the brush head fixture includes a fixture body, a bristle accommodating part, a sealing surface and one or more positioning holes; a bristle accommodating part is provided on one side of the fixture body, and the bristles are The accommodating part is used to accommodate the free ends of the implanted bristles during the process of manufacturing the toothbrush head; the sealing surface is located on the side of the fixture body facing away from the bristle accommodating part, and the sealing surface is used to form the coating When layering, the material of the coating layer is restricted from entering the bristle accommodating part; the positioning hole penetrates the wall of the jig body between the sealing material surface and the bristle accommodating part, and the positioning hole is used to
  • the brush head fixture includes parts corresponding to the brush head body, bristles, and coating layers.
  • One brush head fixture can be used to participate in the entire process of toothbrush head production, simplifying the production process of the toothbrush head and improving the quality of the toothbrush head. production efficiency and ensure precise dimensional fit between components in manufactured toothbrush heads.
  • FIG. 13 is a schematic flowchart of a method for manufacturing a toothbrush head according to a third embodiment of the present application. As shown in Figure 13, the manufacturing method of the toothbrush head according to the embodiment of the present application includes the following steps: Step S201: Provide a brush head fixture.
  • the structure of the brush head fixture is as described in the first embodiment or the second embodiment, and will not be described again here.
  • Step S202 Fix the brush head fixture in the first mold, cooperate the wall of the positioning hole of the brush head fixture with the first mold to form a first cavity, and injection mold the brush head body in the first cavity.
  • the holding portion on the head body corresponds to the positioning hole and is positioned in the positioning hole.
  • the wall of the positioning hole of the brush head fixture is matched with the first mold to form a first mold cavity, that is, the wall of the positioning hole is used as a part of the first mold cavity, and the brush head is formed by injection molding in the first mold cavity. After the main body, the holding part is immediately positioned in the positioning hole, with high positioning accuracy.
  • Figure 5(a) is a schematic diagram of one side of the combination of the brush head body and the brush head fixture.
  • Figure 5(b) is a schematic diagram of the other side of the combination of the brush head body and the brush head fixture.
  • Figure 12(a) is a schematic diagram of one side of the combination of the brush head body and the brush head fixture.
  • Figure 12(b) is a schematic diagram of the other side of the combination of the brush head body and the brush head fixture.
  • the wall portion of the positioning hole of the brush head fixture constitutes a portion of the first cavity corresponding to the outer wall of the holding portion.
  • the brush head fixture is placed into a one-time molding brush head body mold (ie, the first mold) for injection molding to obtain an assembly of the brush head fixture and the brush head body.
  • the joint between the brush head body and the brush head fixture is divided into a holding part and a positioning hole part.
  • the outer part of the holding part is fit with the brush head fixture to ensure that the position of the holding part remains unchanged in subsequent processes.
  • the material injected in the first cavity is a hard plastic precursor, which is used to form a hard brush head body to ensure the cleaning power of the toothbrush head.
  • Step S203 Remove the brush head fixture and the brush head body from the first mold and fix them in the hair transplanting fixture. Pass the bristles through the holding part through the hair transplanting fixture and fix them so that the free ends of the bristles are accommodated in the bristle accommodation. Ministry.
  • Figure 6(a) is a schematic diagram of one side of the toothbrush head with bristles and the brush head fixture.
  • Figure 6(b) is a schematic diagram of the other side of the combination of the toothbrush head with bristles and the brush head fixture.
  • the holding part 13 is used to fix the bristles 11 during the hair transplanting process.
  • the holding part 13 and the brush head fixture form a bristle receiving part 31 on one side, which is used to keep the bristle 11 in a cavity after the bristle 11 is implanted in the hair transplantation process, so as to avoid the displacement and damage of the bristle 11 in subsequent processes.
  • the process of transplanting hairs on the brush head body described in the second embodiment using the brush head jig described in the second embodiment is similar to this and will not be described again.
  • step S203 includes: Pass one end of the bristles through the holding part located in the positioning hole from the side of the sealing material surface through the hair transplanting fixture, and extend into the bristles accommodating part; The ends of the bristles located on the sealing surface side are processed so that the bristles are fixed by the retaining portion.
  • the brush head fixture and the brush head body are fixed in the hair transplanting fixture, the bristles are grabbed with a hair remover, the bristles are pushed into the holding part, and the tails of the bristles are fused or bonded into one body by hot stamping or gluing. Forms the fixed end of the bristles.
  • the brush head fixture fixes all the holding parts on the brush head body, so that the bristles can be effectively and accurately positioned with the hair transplanting fixture during the hair transplanting process, and the hair remover can align the positioning holes to accurately implant the bristles into the holding part.
  • Step S204 Remove the assembly of the brush head fixture and the brush head body after hair transplantation from the hair transplantation fixture, and fix it in the second mold, so that a second cavity is formed between the sealing material surface and the second mold.
  • the coating layer is formed by injection molding in the second cavity.
  • Figure 7(a) is a schematic diagram of one side of the toothbrush head with a wrapping layer and the brush head fixture.
  • Figure 7(b) is a schematic diagram of the other side of the combination of the toothbrush head with the wrapping layer and the brush head fixture.
  • the material injected in the second cavity is a soft plastic precursor, which is used to form a soft wrapping layer 12 to improve the comfort of the toothbrush head when entering it.
  • the injection molding of the wrapping layer of the brush head body described in the second embodiment using the brush head jig described in the second embodiment is similar to this and will not be described again.
  • step S204 also includes: A third cavity is formed between the bristle accommodating part and the second mold.
  • the third cavity is used to accommodate the bristle.
  • the third cavity and the second cavity are isolated from each other by a sealing surface.
  • the assembly of the brush head fixture and the brush head body with bristles is placed into a secondary coating mold, and soft plastic is injected to obtain a toothbrush head.
  • the brush head fixture is placed in the second mold, and the cavity of the second mold is divided into two parts, namely the second cavity and the third cavity.
  • the third cavity is formed by the bristle accommodating part and the second mold, and is used for accommodating the bristle.
  • the second cavity is a soft material filling cavity used to form the wrapping layer.
  • the bristles are completely isolated from the position of the soft material, preventing the soft material from entering the bristles during injection molding and wrapping the bristles together, making the toothbrush head unusable. It also makes the injection molded surface smoother and more beautiful. Since the injection pressure in the mold cavity is very high during mold injection, only a small gap is needed for soft materials to enter and fill, causing product defects. Therefore, a brush head fixture made of metal or high-hard plastic is used. During injection molding, it can not only resist the injection pressure in the mold cavity, but also achieve a high seamless fit with the metal material of the mold to completely block soft plastics.
  • step S204 it also includes: Remove the assembly of the brush head fixture and the brush head body forming the coating layer from the second mold; Separate the brush head body forming the coating layer from the brush head fixture.
  • the toothbrush head product is obtained by peeling off the brush head fixture and the toothbrush head product.
  • the manufacturing of the toothbrush head is completed.
  • the brush head fixture and the toothbrush head are demoulded and separated to obtain the finished toothbrush head.
  • the manufacturing method of the toothbrush head includes: providing a brush head fixture; fixing the brush head fixture in a first mold, so that the wall of the positioning hole of the brush head fixture cooperates with the first mold to form a first mold. cavity, the brush head body is formed by injection molding in the first mold cavity, and the holding portion on the brush head body corresponds to the positioning hole and is positioned in the positioning hole; the brush head fixture and the brush head body are removed from the first mold, and Fixed in the hair transplanting fixture, the bristles are passed through the holding part through the hair transplanting fixture and fixed, so that the free ends of the bristles are received in the bristle receiving part; the assembly of the brush head fixture and the brush head body after the hair transplantation is removed from the hair transplanting fixture.
  • the fixture is removed from the second mold and fixed in the second mold, so that a second cavity is formed between the sealing material surface and the second mold, and a coating layer is formed by injection molding in the second cavity.
  • the brush head jig is used to participate in the entire process of toothbrush head production, simplifying the production process of the toothbrush head, ensuring accurate dimensional matching between the components in the manufactured toothbrush head, and improving the production efficiency of the toothbrush head.
  • the application provides a brush head fixture for toothbrush head production and a toothbrush head manufacturing method.
  • the brush head fixture includes a fixture body, a bristle accommodating part, a sealing surface and one or more positioning holes; a part of the fixture body A bristle accommodating part is provided on the side, and the bristle accommodating part is used to accommodate the free ends of the implanted bristles during the process of manufacturing the toothbrush head; the sealing material surface is located on the side of the jig body facing away from the bristle accommodating part, and the sealing surface is The material surface is used to restrict the material of the coating layer from entering the bristle accommodating part when forming the coating layer; the positioning hole penetrates the wall of the jig body between the sealing material surface and the bristle accommodating part, and the positioning hole is used for molding
  • the retaining part provides a partial wall of the mold cavity, and the retaining part obtained by positioning and molding.
  • the brush head fixture of the present application also includes parts corresponding to the brush head body, bristles, and coating layers.
  • One brush head fixture can be used to participate in the entire process of toothbrush head production, simplifying the production process of the toothbrush head and ensuring that the manufactured toothbrush The dimensions of each component in the head fit precisely together.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Brushes (AREA)

Abstract

本申请涉及一种用于牙刷头生产的刷头治具及牙刷头的制造方法，刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；治具本体的一侧设置刷毛容置部，刷毛容置部用于在制造牙刷头的过程中容置已植入的刷毛的自由端；封料面位于治具本体的背向刷毛容置部的一侧，封料面用于在形成包覆层时限制包覆层的材料进入刷毛容置部；定位孔贯通治具本体的位于封料面与刷毛容置部之间的壁部，定位孔用于在成型保持部时提供型腔的部分壁，以及，定位成型得到的保持部。本申请的刷头治具同时包括与刷头本体、刷毛、包覆层相应的部分，可以使用一个刷头治具参与牙刷头生产的全过程，简化了牙刷头的生产过程，确保制造的牙刷头中各组件之间尺寸精准配合。

Description

用于牙刷头生产的刷头治具及牙刷头的制造方法 技术领域
本申请涉及治具技术领域，具体涉及一种用于牙刷头生产的刷头治具及牙刷头的制造方法。
 背景技术
牙刷是人们每日需要使用的清洁工具，一般由牙刷头和牙刷柄组成。其中，牙刷头一般包括刷头本体和刷毛。为了提升牙刷的使用体验，有的牙刷头在刷头本体增加软质包覆层，或是增加舌苔刷等组件。在构思及实现本申请过程中，发明人发现至少存在如下问题：为了制造牙刷头的不同组件需要用到多种相应的治具，如此使得牙刷头的制造过程较为繁琐，且不同治具与模具之间可能存在尺寸差异，由此制造出来的牙刷头的不同组件之间容易出现尺寸误差。
前面的叙述在于提供一般的背景信息，并不一定构成现有技术。
 技术问题
为了制造牙刷头的不同组件需要用到多种相应的治具，如此使得牙刷头的制造过程较为繁琐，且不同治具与模具之间可能存在尺寸差异，由此制造出来的牙刷头的不同组件之间容易出现尺寸误差。
 技术解决方案
针对上述技术问题，本申请提供一种用于牙刷头生产的刷头治具及牙刷头的制造方法，刷头治具的结构设计可以参与牙刷头生产的全过程，简化了牙刷头的生产过程，提升了牙刷头的生产效率，并确保制造的牙刷头中各组件之间尺寸精准配合。
为解决上述技术问题，本申请提供一种用于牙刷头生产的刷头治具，所述牙刷头包括刷头本体、刷毛和包覆层，所述刷头本体包括一个或多个保持部，所述刷毛的一端通过所述保持部固定，所述包覆层至少包覆所述刷头本体的远离所述刷毛的自由端的部分，所述刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；其中，
所述治具本体的一侧设置所述刷毛容置部，所述刷毛容置部用于在制造所述牙刷头的过程中容置已植入的所述刷毛的自由端；
所述封料面位于所述治具本体的背向所述刷毛容置部的一侧，所述封料面用于在形成所述包覆层时限制所述包覆层的材料进入所述刷毛容置部；
所述一个或多个定位孔贯通所述治具本体的位于所述封料面所在侧与所述刷毛容置部所在侧之间的壁部，所述一个或多个定位孔用于在成型所述一个或多个保持部时提供型腔的部分壁，以及，定位成型得到的所述一个或多个保持部。
可选地，所述定位孔包括第一定位孔和第二定位孔，所述第一定位孔用于在成型所述保持部中的第一保持部时提供型腔的部分壁，以及，定位成型得到的所述第一保持部，所述第一定位孔之间互相连通，所述第二定位孔位于所述第一定位孔的周侧，用于在成型所述保持部中的第二保持部时提供型腔的部分壁，以及，定位成型得到的所述第二保持部，所述第二定位孔之间互不连通。
可选地，所述第一定位孔相互连通后的孔结构的一端设置第一开口，所述刷毛容置部对应所述第一开口的一侧设置第二开口，所述第一开口与所述第二开口连通。
可选地，所述封料面的部分区域用于在成型所述保持部时提供连接件的型腔的部分壁，所述连接件用于连接所述保持部中的第一保持部与第二保持部。
可选地，所述治具本体的背向所述刷毛容置部的一侧端面内凹形成所述封料面；或者，所述治具本体的背向所述刷毛容置部的一侧端面外凸形成所述封料面；或者，所述治具本体的背向所述刷毛容置部的一部分平面为所述封料面。
可选地，所述刷头治具为金属材质或硬质塑料。
另一方面，本申请还提供一种牙刷头的制造方法，包括以下步骤：
S201：提供如上所述的刷头治具；
S202：将所述刷头治具固定于第一模具内，使所述刷头治具的定位孔的壁部与所述第一模具配合形成第一型腔，在所述第一型腔内注塑形成所述刷头本体，所述刷头本体上的保持部与所述定位孔对应并定位于所述定位孔中；
S203：将所述刷头治具和所述刷头本体从所述第一模具中移出，并固定于植毛治具中，通过所述植毛治具将刷毛穿过所述保持部并固定，使所述刷毛的自由端收容于所述刷毛容置部中；
S204：将所述刷头治具和植毛后的所述刷头本体的组合件从所述植毛治具中移出，并固定于第二模具内，使所述封料面与所述第二模具之间形成第二型腔，在所述第二型腔内注塑形成所述包覆层。
可选地，所述S202步骤中，所述刷头治具的定位孔的壁部构成所述第一型腔的对应于所述保持部的外侧壁的部分。
可选地，所述S203步骤，包括：
通过所述植毛治具将所述刷毛的一端从所述封料面一侧穿过定位于所述定位孔中的所述保持部，并延伸至所述刷毛容置部中；
对所述刷毛的位于所述封料面一侧的端部进行处理，以使所述刷毛通过所述保持部固定。
可选地，所述S204步骤之后，还包括：
将所述刷头治具和形成所述包覆层的所述刷头本体的组合件从所述第二模具中移出；
将形成所述包覆层的所述刷头本体从所述刷头治具中分离出来。
可选地，所述第一型腔内注塑的材料为硬质塑料前驱体，所述第二型腔内注塑的材料为软质塑料前驱体。
 有益效果
本申请的用于牙刷头生产的刷头治具，牙刷头包括刷头本体、刷毛和包覆层，刷头本体包括一个或多个保持部，刷毛的一端通过保持部固定，包覆层至少包覆刷头本体的远离刷毛的自由端的部分，刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；治具本体的一侧设置刷毛容置部，刷毛容置部用于在制造牙刷头的过程中容置已植入的刷毛的自由端；封料面位于治具本体的背向刷毛容置部的一侧，封料面用于在形成包覆层时限制包覆层的材料进入刷毛容置部；定位孔贯通治具本体的位于封料面所在侧与刷毛容置部所在侧之间的壁部，定位孔用于在成型保持部时提供型腔的部分壁，以及，定位成型得到的保持部。本申请的刷头治具同时包括与刷头本体、刷毛、包覆层相应的部分，可以使用一个刷头治具参与牙刷头生产的全过程，简化了牙刷头的生产过程，提升了牙刷头的生产效率，并确保制造的牙刷头中各组件之间尺寸精准配合。
本申请的牙刷头的制造方法，包括：提供刷头治具；将刷头治具固定于第一模具内，使刷头治具的定位孔的壁部与第一模具配合形成第一型腔，在第一型腔内注塑形成刷头本体，刷头本体上的保持部与定位孔对应并定位于定位孔中；将刷头治具和刷头本体从第一模具中移出，并固定于植毛治具中，通过植毛治具将刷毛穿过保持部并固定，使刷毛的自由端收容于刷毛容置部中；将刷头治具和植毛后的刷头本体的组合件从植毛治具中移出，并固定于第二模具内，使封料面与第二模具之间形成第二型腔，在第二型腔内注塑形成包覆层。本申请的刷头治具参与了牙刷头生产的全过程，简化了牙刷头的生产过程，确保制造的牙刷头中各组件之间尺寸精准配合，提升了牙刷头的生产效率。
 附图说明
图1是根据本申请第一实施例示出的牙刷头的结构示意图。
图2是根据本申请第一实施例示出的刷头本体的结构示意图。
图3是根据本申请第一实施例示出的牙刷治具的结构示意图之一。
图4是根据本申请第一实施例示出的牙刷治具的结构示意图之二。
图5是根据本申请第一实施例示出的刷头本体与牙刷治具的组合示意图。
图6是根据本申请第一实施例示出的具有刷毛的牙刷头与刷头治具的组合示意图。
图7是根据本申请第一实施例示出的具有包裹层的牙刷头与刷头治具的组合示意图。
图8是根据本申请第一实施例示出的另一种封料面的结构示意图。
图9是根据本申请第二实施例示出的刷头本体的结构示意图。
图10是根据本申请第二实施例示出的牙刷治具的结构示意图之一。
图11是根据本申请第二实施例示出的牙刷治具的结构示意图之二。
图12是根据本申请第二实施例示出的刷头本体与牙刷治具的组合示意图。
图13是根据本申请第三实施例示出的牙刷头的制造方法的流程示意图。
附图标记说明：
10、刷头本体；11、刷毛；12、包覆层；13、保持部；131、第一保持部；132、连接件；133、第二保持部；134、固定孔；
30、治具本体；31、刷毛容置部；32、封料面；33、定位孔；331、第一定位孔；332、第二定位孔。
本发明的实施方式
以下由特定的具体实施例说明本申请的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本申请的其他优点及功效。
在下述描述中，参考附图，附图描述了本申请的若干实施例。应当理解，还可使用其他实施例，并且可以在不背离本申请的精神和范围的情况下进行机械组成、结构、电气以及操作上的改变。下面的详细描述不应该被认为是限制性的，这里使用的术语仅是为了描述特定实施例，而并非旨在限制本申请。
虽然在一些实例中术语第一、第二等在本文中用来描述各种元件，但是这些元件不应当被这些术语限制。这些术语仅用来将一个元件与另一个元件进行区分。
再者，如同在本文中所使用的，单数形式“一”、“一个”和“该”旨在也包括复数形式，除非上下文中有相反的指示。应当进一步理解，术语“包含”、“包括”表明存在所述的特征、步骤、操作、元件、组件、项目、种类、和/或组，但不排除一个或多个其他特征、步骤、操作、元件、组件、项目、种类、和/或组的存在、出现或添加。此处使用的术语“或”和“和/或”被解释为包括性的，或意味着任一个或任何组合。因此，“A、B或C”或者“A、B和/或C”意味着“以下任一个：A；B；C；A和B；A和C；B和C；A、B和C”。仅当元件、功能、步骤或操作的组合在某些方式下内在地互相排斥时，才会出现该定义的例外。
第一实施例
图1是根据本申请第一实施例示出的牙刷头的结构示意图。图2是根据本申请第一实施例示出的刷头本体的结构示意图。如图1与图2所示，牙刷头包括刷头本体10、刷毛11和包覆层12，刷头本体10包括一个或多个保持部13，刷毛11的一端通过保持部13固定，包覆层12至少包覆刷头本体10的远离刷毛11的自由端的部分。
如图3与图4所示，本申请实施例的用于牙刷头生产的刷头治具，可用于生产上述结构的牙刷头，刷头治具包括治具本体30、刷毛容置部31、封料面32和一个或多个定位孔33。
其中，治具本体30的一侧设置刷毛容置部31，刷毛容置部31用于在制造牙刷头的过程中容置已植入的刷毛11的自由端。封料面32位于治具本体30的背向刷毛容置部31的一侧，封料面32用于在形成包覆层12时限制包覆层12的材料进入刷毛容置部31。一个或多个定位孔33贯通治具本体30的位于封料面32所在侧与刷毛容置部31所在侧之间的壁部，一个或多个定位孔33用于在成型保持部13时提供型腔的部分壁，以及，定位成型得到的保持部13。
本实施例中，刷头治具由金属材料或硬质塑料制成，具体有较高的硬度和强度，置于模具腔体内用于牙刷头成型时，能抵抗模具腔体内较大的注塑压力而保持尺寸稳定，且可以重复使用。
结合图2、图3和图5，其中，图5(a)是刷头本体与刷头治具的一侧组合示意图。图5(b)是刷头本体与刷头治具的另一侧组合示意图。刷头治具中的定位孔33与保持部13相对应。具体地，定位孔33贯通治具本体30的位于封料面32与刷毛容置部31之间的壁部，定位孔33用于在成型保持部13时提供型腔的部分壁，注塑材料进行该型腔可以成型保持部13。此外，定位孔33还用于定位成型得到的保持部13。定位孔33在第一次成型刷头本体10后，将成型的保持部13固定于定位孔33内，防止保持部13在制造过程中位置发生移动降低装配误差，以便后续制造工艺的顺利进行。
作为其中一种实施方式，定位孔33的深度可选择小于保持部13的高度，以便牙刷头中保持部13与刷毛11、包裹层12一体成型。
作为其中一种实施方式，保持部13包括第一保持部131和第二保持部133，第一保持部131位于刷头本体10的中间和下部且连接为一体，第二保持部133位于刷头本体10的周侧且相互独立，第二保持部133与一体连接的第一保持部131之间通过连接件132连接。相应地，定位孔33包括第一定位孔331和第二定位孔332，第一定位孔331与第一保持部131相对应，且第一定位孔331之间互相连通，第二定位孔332位于第一定位孔331的周侧并与第二保持部133相对应，且第二定位孔332之间互不连通。如此，定位孔33能在牙刷头的成型过程中分别提供成型第一保持部131、第二保持部133的型腔的部分壁，在定位孔33与成型刷头本体的模具配合形成的型腔内注塑，可得到第一保持部131和第二保持部133。
作为其中一种实施方式，第二保持部133与第一保持部131之间通过连接件132连接，封料面的部分壁还用于成型保持部13时提供连接件132的型腔的部分壁。连接件132位于第一保持部131和第二保持部133之间。由于第一保持部131和第二保持部133均与定位孔33一一对应，定位孔33能在牙刷头的成型过程中分别提供成型第一保持部131、第二保持部133的型腔的部分壁。定位孔33贯通封料面32，通过封料面32在连接件132的成型过程中提供型腔的部分壁，在封料面32与成型刷头本体的模具配合形成的型腔内注塑，可同步得到连接件132。
作为其中一种实施方式，第一定位孔331相互连通后的孔结构的一端设置第一开口，刷毛容置部31对应第一开口的一侧设置第二开口，第一开口与第二开口连通。如此设计可用于刷头本体与刷柄一体成型，便于刷头治具制造，且有利于将制造完成的牙刷头与刷头治具顺利脱模。
结合图2、图3和图6，其中，图6(a)是具有刷毛的牙刷头与刷头治具的一侧组合示意图，图6(b)是具有刷毛的牙刷头与刷头治具的另一侧组合示意图。刷头治具的刷毛容置部31用于进行植毛工艺以及第二次成型包裹层12时，将刷毛11的自由端收容在刷毛容置部31内，可防止植毛治具或第二模具压伤或烫伤刷毛11。优选地，刷毛容置部31的形状可以是刷头治具的一侧内凹形成的腔体，刷毛11收容于该腔体中。在其他实施方式中，治具本体30的一侧也可以为平面，刷头治具置于用于进行植毛工艺的模具中（简称植毛治具），或者第二次成型包裹层12的模具（简称第二模具）中，该平面可作为刷毛容置部与植毛治具或第二模具形成用于容置刷毛的腔。
结合图1、图3和图7，其中，图7(a)是具有包裹层的牙刷头与刷头治具的一侧组合示意图。图7(b)是具有包裹层的牙刷头与刷头治具的另一侧组合示意图。刷头治具的封料面32在软质材料包覆层12注塑成型时，软质材料包裹到此面为止，起到了封胶作用，防止软质材料进入刷毛容置部31。如图1所示，封料面32所在区域的形状与牙刷头的形状相匹配，治具本体30的背向刷毛容置部31的一侧端面内凹形成封料面32。如此，便于封料面32与第二模具配合形成用于成型包裹层12的型腔。在另一实施方式中，如图8所示，治具本体30的背向刷毛容置部31的一侧端面外凸形成封料面32。如此，便于封料面32与第二模具中的对应位置嵌合形成用于成型包裹层12的型腔。当然，在其他实施方式中，治具本体30的背向刷毛容置部31的一部分区域为封料面32。如此，便于牙刷头的制造。
本申请实施例的用于牙刷头生产的刷头治具，牙刷头包括刷头本体、刷毛和包覆层，刷头本体包括一个或多个保持部，刷毛的一端通过保持部固定，包覆层至少包覆刷头本体的远离刷毛的自由端的部分，刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；治具本体的一侧设置刷毛容置部，刷毛容置部用于在制造牙刷头的过程中容置已植入的刷毛的自由端；封料面位于治具本体的背向刷毛容置部的一侧，封料面用于在形成包覆层时限制包覆层的材料进入刷毛容置部；定位孔贯通治具本体的位于封料面与刷毛容置部之间的壁部，定位孔用于在成型保持部时提供型腔的部分壁，以及，定位成型得到的保持部。如此，刷头治具同时包括与刷头本体、刷毛、包覆层相应的部分，可以使用一个刷头治具参与牙刷头生产的全过程，简化了牙刷头的生产过程，提升了牙刷头的生产效率，并确保制造的牙刷头中各组件之间尺寸精准配合。
第二实施例
图9是根据本申请第二实施例示出的刷头本体的结构示意图。如图9所示，与第一实施例的刷头本体不同的是，本实施例的刷头本体10包括一个保持部13，保持部13中设有多个固定孔134。制作成牙刷头时，刷毛的一端通过保持部13上的固定孔134进行固定，包覆层至少包覆刷头本体10的远离刷毛的自由端的部分。
如图10与图11所示，本申请实施例的用于牙刷头生产的刷头治具，可用于生产具有上述结构的刷头本体10的牙刷头，刷头治具包括治具本体30、刷毛容置部31、封料面32和一个定位孔33。
其中，治具本体30的一侧设置刷毛容置部31，刷毛容置部31用于在制造牙刷头的过程中容置已植入的刷毛11的自由端。封料面32位于治具本体30的背向刷毛容置部31的一侧，封料面32用于在形成包覆层12时限制包覆层12的材料进入刷毛容置部31。定位孔33贯通治具本体30的位于封料面32所在侧与刷毛容置部31所在侧之间的壁部，定位孔33用于在成型保持部13时提供型腔的部分壁，以及，定位成型得到的保持部13。在本实施例中，封料面32为治具本体30的背向刷毛容置部31一侧的环绕定位孔33的区域。
本实施例中，刷头治具由金属材料或硬质塑料制成，具体有较高的硬度和强度，置于模具腔体内用于牙刷头成型时，能抵抗模具腔体内较大的注塑压力而保持尺寸稳定，且可以重复使用。
如图12所示，其中，图12(a)是刷头本体与刷头治具的一侧组合示意图。图12(b)是刷头本体与刷头治具的另一侧组合示意图。刷头治具中的定位孔33与保持部13相对应。具体地，定位孔33贯通治具本体30的位于封料面32所在侧与刷毛容置部31所在侧之间的壁部，定位孔33用于在成型保持部13时提供型腔的部分壁，注塑材料进行该型腔可以成型保持部13。此外，定位孔33还用于定位成型得到的保持部13。定位孔33在第一次成型刷头本体10后，保持部13的部分外壁与刷头治具的定位孔33配合，将成型的保持部13固定于定位孔33内，防止保持部13在制造过程中位置发生移动，降低装配误差，以便后续制造工艺的顺利进行。与此同时，保持部13中的固定孔134也得到了定位。
刷头治具的刷毛容置部31用于进行植毛工艺以及第二次成型包裹层时，将刷毛的自由端收容在刷毛容置部31内，可防止植毛治具或第二模具压伤或烫伤刷毛。优选地，刷毛容置部31的形状可以是治具本体30的一侧内凹形成的腔体，刷毛收容于该腔体中。在其他实施方式中，治具本体30的一侧也可以为平面，刷头治具置于用于进行植毛工艺的模具中（简称植毛治具），或者第二次成型包裹层的模具（简称第二模具）中，该平面可作为刷毛容置部与植毛治具或第二模具形成用于容置刷毛的腔。该部分中，刷头治具与刷头本体、植毛治具的配合方式与第一实施例类似，不再赘述。
刷头治具的封料面32在软质材料包覆层注塑成型时，软质材料包裹到此面为止，起到了封胶作用，防止软质材料进入刷毛容置部31。如图10所示，在本实施例中，封料面32为治具本体30的背向刷毛容置部31一侧的环绕定位孔33的区域，该区域可以为平面、凹面或凸面，只需封料面32便于与第二模具中的对应位置嵌合形成用于成型包裹层的型腔即可。该部分中，刷头治具与刷头本体、第二模具的配合方式与第一实施例类似，不再赘述。
本申请实施例的用于牙刷头生产的刷头治具，牙刷头包括刷头本体、刷毛和包覆层，刷头本体包括一个保持部，刷毛的一端通过保持部固定，包覆层至少包覆刷头本体的远离刷毛的自由端的部分，刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；治具本体的一侧设置刷毛容置部，刷毛容置部用于在制造牙刷头的过程中容置已植入的刷毛的自由端；封料面位于治具本体的背向刷毛容置部的一侧，封料面用于在形成包覆层时限制包覆层的材料进入刷毛容置部；定位孔贯通治具本体的位于封料面与刷毛容置部之间的壁部，定位孔用于在成型保持部时提供型腔的部分壁，以及，定位成型得到的保持部。如此，刷头治具同时包括与刷头本体、刷毛、包覆层相应的部分，可以使用一个刷头治具参与牙刷头生产的全过程，简化了牙刷头的生产过程，提升了牙刷头的生产效率，并确保制造的牙刷头中各组件之间尺寸精准配合。
第三实施例
图13是根据本申请第三实施例示出的牙刷头的制造方法的流程示意图。如图13所示，本申请实施例的牙刷头的制造方法，包括以下步骤：
步骤S201：提供刷头治具。
刷头治具的结构如第一实施例或第二实施例所述，在此不再赘述。
步骤S202：将刷头治具固定于第一模具内，使刷头治具的定位孔的壁部与第一模具配合形成第一型腔，在第一型腔内注塑形成刷头本体，刷头本体上的保持部与定位孔对应并定位于定位孔中。
其中，将刷头治具的定位孔的壁部与第一模具配合形成第一型腔，也即，定位孔的壁部作为第一型腔的一部分，在第一型腔内注塑形成刷头本体后，保持部随即定位于定位孔中，定位精度高。
以第一实施例中所述的刷头本体和刷头治具为例，如图5所示，图5(a)是刷头本体与刷头治具的一侧组合示意图。图5(b)是刷头本体与刷头治具的另一侧组合示意图。刷头治具固定于第一模具之后，定位孔33的壁部与第一模具配合形成第一型腔，在第一型腔内注塑形成刷头本体10。如此得到的保持部13与定位孔33一一对应，且固定在定位孔33中。
以第二实施例中所述的刷头本体和刷头治具为例，如图12所示，图12(a)是刷头本体与刷头治具的一侧组合示意图。图12(b)是刷头本体与刷头治具的另一侧组合示意图。刷头治具固定于第一模具之后，定位孔33的壁部与第一模具配合形成第一型腔，在第一型腔内注塑形成刷头本体10。如此得到的保持部13与定位孔33位置对应，且固定在定位孔33中。
作为其中一种实施方式，步骤S202中，刷头治具的定位孔的壁部构成第一型腔的对应于保持部的外侧壁的部分。
具体地，将刷头治具放入一次成型刷头本体模具（即第一模具）内注塑成型，得到刷头治具和刷头本体的组合件。刷头本体与刷头治具结合处分为保持部和定位孔部分。保持部的外部与刷头治具贴合，确保在后续工艺中，保持部的位置不变。其中，第一型腔内注塑的材料为硬质塑料前驱体，用于形成硬质的刷头本体，保证牙刷头的清洁力度。
步骤S203：将刷头治具和刷头本体从第一模具中移出，并固定于植毛治具中，通过植毛治具将刷毛穿过保持部并固定，使刷毛的自由端收容于刷毛容置部中。
其中，将刷头治具和刷头本体从第一模具中移出时，可以选择采用将刷头治具和刷头本体的组合件作为整体移出，从而在进行植毛前无需再通过刷头治具对刷头本体进行二次定位，简化工艺且对位准确性高。
以第一实施例中所述的刷头本体和刷头治具为例，如图6所示，图6(a)是具有刷毛的牙刷头与刷头治具的一侧组合示意图。图6(b)是具有刷毛的牙刷头与刷头治具的另一侧组合示意图。保持部13用于在植毛工艺中将刷毛11固定。保持部13与刷头治具在一侧形成刷毛容置部31，用于植毛工艺中刷毛11植入后保持刷毛11在一个腔体内，避免刷毛11在后续工艺中的移位和损伤。采用第二实施例中所述的刷头治具对第二实施例中所述的刷头本体进行植毛的工艺与此类似，不再赘述。
作为其中一种实施方式，步骤S203，包括：
通过植毛治具将刷毛的一端从封料面一侧穿过定位于定位孔中的保持部，并延伸至刷毛容置部中；
对刷毛的位于封料面一侧的端部进行处理，以使刷毛通过保持部固定。
这里，将刷头治具和刷头本体固定于植毛治具内，用取毛器抓取刷毛，将刷毛推入保持部内，用热烫或粘胶方式将刷毛尾部熔合或粘合成一体，形成刷毛的固定端。刷头治具将刷头本体上所有的保持部固定，使得在植毛工艺中刷毛能有效的与植毛治具精准定位，取毛器可以对准定位孔准确的将刷毛植入到保持部内。
步骤S204：将刷头治具和植毛后的刷头本体的组合件从植毛治具中移出，并固定于第二模具内，使封料面与第二模具之间形成第二型腔，在第二型腔内注塑形成包覆层。
以第一实施例中所述的刷头本体和刷头治具为例，如图7所示，图7(a)是具有包裹层的牙刷头与刷头治具的一侧组合示意图。图7(b)是具有包裹层的牙刷头与刷头治具的另一侧组合示意图。保持部13植毛后与刷头治具的封料面32形成一个封闭平面，用于在二次注塑软质材料时给软质材料提供一个止面，防止软质材料进入到刷毛容置部31将刷毛包裹。其中，第二型腔内注塑的材料为软质塑料前驱体，用于形成软质的包裹层12，提升牙刷头入口时的舒适度。采用第二实施例中所述的刷头治具对第二实施例中所述的刷头本体进行包裹层的注塑与此类似，不再赘述。
作为其中一种实施方式，S204步骤，还包括：
刷毛容置部与第二模具之间形成第三型腔，第三型腔用于收容刷毛，第三型腔和第二型腔之间通过封料面互相隔离。
将刷头治具和具有刷毛的刷头本体的组合件放入到二次包胶模具内，注塑软质塑料，得到牙刷头。
这里，刷头治具置于第二模具中，将第二模具的腔体分成两部分，即第二型腔和第三型腔。其中，第三型腔由刷毛容置部与第二模具配合形成，用于收容刷毛。第二型腔为软质材料填充腔，用于成型包裹层。这样，将刷毛与软质材料所在的位置完全隔离，防止软质材料在注塑成型时进入到刷毛处，将刷毛包裹在一起，致使牙刷头无法使用，同时也使得注塑成型的表面更加平整美观。由于模具注塑时模腔内注塑压力非常大，只需要很小的缝隙软质材料即可进入填充，引起产品不良，因此，采用由金属材质或高硬质塑料制成的刷头治具，在注塑成型时既可以抵抗模具腔体内的注塑压力，又可以与模具的金属材料实现较高的无缝隙配合，达到完全的阻隔软质塑料的作用。
作为其中一种实施方式，步骤S204步骤之后，还包括：
将刷头治具和形成包覆层的刷头本体的组合件从第二模具中移出；
将形成包覆层的刷头本体从刷头治具中分离出来。
将刷头治具与牙刷头产品剥离，即得到牙刷头产品。
这里，通过刷头治具依次成型牙刷头的刷头本体、刷毛和包裹层之后，即完成牙刷头的制造。将刷头治具与牙刷头脱模分离，得到成品的牙刷头。
本申请实施例的牙刷头的制造方法，包括：提供刷头治具；将刷头治具固定于第一模具内，使刷头治具的定位孔的壁部与第一模具配合形成第一型腔，在第一型腔内注塑形成刷头本体，刷头本体上的保持部与定位孔对应并定位于定位孔中；将刷头治具和刷头本体从第一模具中移出，并固定于植毛治具中，通过植毛治具将刷毛穿过保持部并固定，使刷毛的自由端收容于刷毛容置部中；将刷头治具和植毛后的刷头本体的组合件从植毛治具中移出，并固定于第二模具内，使封料面与第二模具之间形成第二型腔，在第二型腔内注塑形成包覆层。如此，采用刷头治具参与了牙刷头生产的全过程，简化了牙刷头的生产过程，确保制造的牙刷头中各组件之间尺寸精准配合，提升了牙刷头的生产效率。
上述所有实施例，仅为本申请的具体实施方式，用以说明本申请的技术方案，而非对其进行限制，本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员对前述实施例所记载的技术方案进行同等变形或替换都包含在本申请权利要求所限定的范围内。
 工业实用性
本申请的用于牙刷头生产的刷头治具及牙刷头的制造方法，刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；治具本体的一侧设置刷毛容置部，刷毛容置部用于在制造牙刷头的过程中容置已植入的刷毛的自由端；封料面位于治具本体的背向刷毛容置部的一侧，封料面用于在形成包覆层时限制包覆层的材料进入刷毛容置部；定位孔贯通治具本体的位于封料面与刷毛容置部之间的壁部，定位孔用于在成型保持部时提供型腔的部分壁，以及，定位成型得到的保持部。本申请的刷头治具同时包括与刷头本体、刷毛、包覆层相应的部分，可以使用一个刷头治具参与牙刷头生产的全过程，简化了牙刷头的生产过程，确保制造的牙刷头中各组件之间尺寸精准配合。

Claims (10)

  1. 一种用于牙刷头生产的刷头治具，所述牙刷头包括刷头本体、刷毛和包覆层，所述刷头本体包括一个或多个保持部，所述刷毛的一端通过所述保持部固定，所述包覆层至少包覆所述刷头本体的远离所述刷毛的自由端的部分，其特征在于，所述刷头治具包括治具本体、刷毛容置部、封料面和一个或多个定位孔；其中，
    所述治具本体的一侧设置所述刷毛容置部，所述刷毛容置部用于在制造所述牙刷头的过程中容置已植入的所述刷毛的自由端；
    所述封料面位于所述治具本体的背向所述刷毛容置部的一侧，所述封料面用于在形成所述包覆层时限制所述包覆层的材料进入所述刷毛容置部；
    所述一个或多个定位孔贯通所述治具本体的位于所述封料面所在侧与所述刷毛容置部所在侧之间的壁部，所述一个或多个定位孔用于在成型所述一个或多个保持部时提供型腔的部分壁，以及，定位成型得到的所述一个或多个保持部。
  2. 根据权利要求1所述的刷头治具，其特征在于，所述定位孔包括第一定位孔和第二定位孔，所述第一定位孔用于在成型所述保持部中的第一保持部时提供型腔的部分壁，以及，定位成型得到的所述第一保持部，所述第一定位孔之间互相连通，所述第二定位孔位于所述第一定位孔的周侧，用于在成型所述保持部中的第二保持部时提供型腔的部分壁，以及，定位成型得到的所述第二保持部，所述第二定位孔之间互不连通。
  3. 根据权利要求1所述的刷头治具，其特征在于，所述封料面的部分区域用于在成型所述保持部时提供连接件的型腔的部分壁，所述连接件用于连接所述保持部中的第一保持部与第二保持部。
  4. 根据权利要求1所述的刷头治具，其特征在于，所述治具本体的背向所述刷毛容置部的一侧端面内凹形成所述封料面；或者，所述治具本体的背向所述刷毛容置部的一侧端面外凸形成所述封料面；或者，所述治具本体的背向所述刷毛容置部的一侧端面的一部分区域为所述封料面。
  5. 根据权利要求1至4中任一项所述的刷头治具，其特征在于，所述刷头治具为金属材质或硬质塑料。
  6. 一种牙刷头的制造方法，其特征在于，包括以下步骤：
    S201：提供如权利要求1至5中任一项所述的刷头治具；
    S202：将所述刷头治具固定于第一模具内，使所述刷头治具的定位孔的壁部与所述第一模具配合形成第一型腔，并在所述第一型腔内注塑形成所述刷头本体，所述刷头本体上的保持部与所述定位孔一一对应并定位于所述定位孔中；
    S203：将所述刷头治具和所述刷头本体从所述第一模具中移出，并固定于植毛治具中，通过所述植毛治具将刷毛穿过所述保持部并固定，使所述刷毛的自由端收容于所述刷头治具的刷毛容置部中；
    S204：将所述刷头治具和植毛后的所述刷头本体的组合件从所述植毛治具中移出，并固定于第二模具内，使所述刷头治具的封料面与所述第二模具之间形成第二型腔，在所述第二型腔内注塑形成包覆层。
  7. 根据权利要求6所述的制造方法，其特征在于，所述S202的步骤中，所述刷头治具的定位孔的壁部构成所述第一型腔的对应于所述保持部的外侧壁的部分。
  8. 根据权利要求6所述的制造方法，其特征在于，所述S203的步骤，包括：
    通过所述植毛治具将所述刷毛的一端从所述封料面一侧穿过定位于所述定位孔中的所述保持部，并延伸至所述刷毛容置部中；
    对所述刷毛的位于所述封料面一侧的端部进行处理，以使所述刷毛通过所述保持部固定。
  9. 根据权利要求6所述的制造方法，其特征在于，所述S204的步骤之后，还包括：
    将所述刷头治具和形成所述包覆层的所述刷头本体的组合件从所述第二模具中移出；
    将形成所述包覆层的所述刷头本体从所述刷头治具中分离出来。
  10. 根据权利要求6所述的制造方法，其特征在于，所述第一型腔内注塑的材料为硬质塑料前驱体，所述第二型腔内注塑的材料为软质塑料前驱体。
PCT/CN2023/072740 2023-01-17 2023-01-17 用于牙刷头生产的刷头治具及牙刷头的制造方法 WO2024007571A1 (zh)

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