A molding die and process for oral cleaning brush head

Abstract

The invention discloses a molding die for an oral cleaning brush head, comprising two base molds which open and close with each other, the two base molds being closed to form a mold cavity, a mold base which is arranged in a fan shape is concavely provided in the base mold, a molding component is arranged in the mold base, the molding component comprises an upper sheet group and a lower sheet group which are composed of a plurality of sheet units, the sheet units are arranged in sequence in the mold base, at least two base holes for forming bristles are provided in the sheet units, and the upper sheet group and the lower sheet group form a mold cavity for forming a brush body in the mold cavity, base holes are provided on the sheet units to form bristles, the sheet units divide the fan-shaped mold cavity into equal parts, so that the bristles are neatly arranged on the brush body, the arrangement and combination of the sheet units are convenient, the sheet components are easy to process and mold, the difficulty of mold manufacturing is reduced, and thus it is beneficial for the bristles to be neatly demolded from the mold cavity, thereby greatly improving the quality of the bristles.

Description

Technical Field

[0001] The invention relates to the technical field of mold forming, and in particular to a forming mold for an oral cleaning brush head. Background Art

[0002] At present, there is a brush head on the market, whose brush body is in the shape of a U-shaped arc line, especially a cleaning brush head for oral cleaning, and bristles are arranged on the end surface of the brush body. At present, the brush head molding mold in the prior art usually first molds the brush body, bends the brush body by thermal processing, and the bristles on the brush body are also molded on another component body by thermal processing, and then the brush body is connected to the bristle component body or thermally processed. In addition, the bristle molding of another brush head mold in the prior art is formed by drilling holes on the die head to form a molding cavity for the bristles. Due to the high hardness of the die head and the small diameter of the drill bit, processing and demoulding are extremely difficult;

[0003] In summary, the brush head mold in the prior art has the following defects: 1. The brush body and the bristles are not integrally formed, and the molding process is complicated; 2. The bristle molding effect is poor, and the bristles are arranged twisted and complicated on the component body, which is not conducive to cleaning and use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a molding die for a U-shaped brush head to improve the molding effect of the brush body and bristles.

[0005] The above technical purpose of the present invention is achieved through the following technical scheme: a molding mold for an oral cleaning brush head, comprising two base molds that open and close with each other, the two base molds are closed to form a mold cavity, a mold base arranged in a fan shape is concave in the base mold, a molding component is arranged in the mold base, and the molding component includes an upper sheet group and a lower sheet group composed of multiple sheet units, the sheet units are arranged in sequence in the mold base, at least two base holes for bristle molding are opened in the sheet units, and the upper sheet group and the lower sheet group form a mold cavity for brush body molding in the mold cavity.

[0006] Furthermore, the sheet unit extending out of the mold base is provided with a molding protrusion, the base hole is arranged on the contour side of the molding protrusion and away from the mold cavity, and the protruding end surface of the molding protrusion constitutes a constituent surface of the bristles on the brush body. Through the above improvements, the molding protrusions on the upper sheet group and the lower sheet group constitute a brush body with an "I"-shaped cross-section in the mold cavity, and the bristles are molded in the "I"-shaped semi-enclosed cavity, thereby limiting the bristles to be concentrated in the cleaning working area of ​​the brush head, ensuring the cleaning effect, and increasing the structural stability of the brush body.

[0007] Furthermore, at least one positioning step is provided on both sides of the molding protrusion, a limiting strip is pressed on the outermost positioning step of the mold base, and the base mold upper cover is provided with a fixed mold plate for enclosing the cavity. Through the above improvements, the setting of the positioning step makes the sheet unit more stable in the mold base. At the same time, the step surface of the positioning step provides a limiting position for the sheet unit in the vertical direction. The sheet units in the mold base are pressed by the limiting strip and the fixed mold plate, so that the sheet units in the mold base are arranged neatly, thereby preventing the sheet units from being deformed and affecting the forming of the brush head.

[0008] Furthermore, the base hole has a first hole portion and a second hole portion along the axial direction, and the first hole portion and the second hole portion have a tendency to converge toward the center along the axial direction, and the minimum end outer diameter of the first hole portion is larger than the maximum end outer diameter of the second hole portion. Through the above improvements, the first hole portion forms a base portion that stabilizes the shape of the bristles, and the second hole portion forms a bristle tip for cleaning work, so that the bristle tip can be extruded and bent at the base portion, which is conducive to demolding.

[0009] Preferably, the axial length of the first hole portion on the insert sheet unit on the lower sheet group is greater than the axial length of the first hole portion on the insert sheet unit on the lower sheet group;

[0010] The axial length of the second hole portion on the insert piece unit on the lower piece group is smaller than the axial length of the first hole portion on the insert piece unit on the lower piece group;

[0011] The maximum end outer diameter of the second hole portion on the insert piece unit on the lower piece group is greater than the maximum end outer diameter of the second hole portion on the insert piece unit on the upper piece group;

[0012] The bristles on the brush body corresponding to the upper teeth are relatively soft and pointed, while the bristles on the brush body corresponding to the lower teeth are relatively coarse and hard. Since the gums of the lower teeth are more easily brushed when brushing, the gums of the lower teeth can withstand bristles with greater friction to achieve a cleaning effect; the gums of the upper teeth are not easily brushed, and tartar is easily formed there. The gums are relatively fragile, so pointed and soft bristles are used to clean the gums gently and gradually, reducing damage to the gums and bleeding.

[0013] Preferably, the base hole is arranged as a half hole on the sheet unit, and equal rows of bristles are formed between two adjacent sheet units. Through the above improvement, sheet unit processing is convenient, demoulding is beneficial, and local deformation of the bristles during demoulding is reduced.

[0014] Preferably, the base holes are arranged in a full circle on the sheet unit, and each sheet unit forms equal rows of bristles on the brush body. Through the above improvements, the manufacturing cost is reduced.

[0015] Furthermore, it also includes a discharge pipe, and the discharge pipe is provided with discharge heads on both sides of the corresponding cavity, and half holes are provided on the upper and lower fixed templates corresponding to the discharge heads. The two half holes are closed to form a material channel connected to the cavity, and the discharge head is embedded in the material channel. Through the above improvements, it is conducive to the rapid molding of the brush head and the uniform distribution of the brush head molten material.

[0016] Furthermore, a type of base hole is provided on both sides of the forming protrusion on the sheet unit, and the type of base holes on both sides are relatively inclined to point to the middle of the sheet unit. At least a second type of base hole is provided on the top of the forming protrusion on the end of the mold base, and the second type of base hole extends out or is retracted between the type of base holes. Through the above improvements, the bristles on both sides are inclined to point to the middle, giving the bristles a tendency to bend toward the middle, avoiding plastic deformation of the bristles and reducing the waste of bristles on the front teeth and the incisors on both sides of the front teeth.

[0017] Furthermore, a sink for forming part of the mold base is provided in the base mold, and some of the sheet units are provided with positioning edges corresponding to the sink. Through the above improvements, the positioning effect and stability of the sheet units in the mold base are increased.

[0018] Furthermore, the molding assembly also includes a positioning block located at the end of the mold base and a fixed block constrained on the base mold, the positioning block is against the outermost sheet unit, and the fixed block squeezes the positioning block and eliminates the gap between the sheet units.

[0019] A molding process for an oral cleaning brush head comprises the following steps:

[0020] a. An injection head connected to one end of the middle portion of the cavity is disposed between the fixed templates, and a movable insert connected to the other end of the middle portion of the cavity is disposed between the fixed templates;

[0021] b. Re-mix the materials in parts of thermoplastic polyether elastomer 70A and thermoplastic polyether elastomer 80A, and add the masterbatch ratio;

[0022] c. The two base molds are closed, and the movable insert is inserted into the cavity;

[0023] d. Control the injection pressure at 38 MPa, maintain the injection temperature between 215°C and 220°C, set the injection time to 3 seconds, and the injection head outputs the molten thermoplastic elastomer in the cavity;

[0024] e. Adjust the back pressure to 38Pa, maintain pressure for 3s, and cool for 50s;

[0025] f. The movable insert is removed from the cavity and the two base molds are opened.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. The base holes are set on the sheet unit to form the bristles. The sheet unit divides the fan-shaped mold cavity into equal parts, so that the bristles are neatly arranged on the brush body, which is convenient for the arrangement and combination of the sheet units. The sheet components are easy to process and form, which reduces the difficulty of mold manufacturing, thus facilitating the neat demoulding of the bristles from the mold cavity and greatly improving the quality of the bristles.

[0028] 2. The lower sheet group is arranged on the lower base mold, and the upper sheet group is arranged on the upper base mold. The molding protrusion of the sheet unit extending from the mold base and the fixed mold plate enclose a cavity tending to be "U"-shaped, and a "U"-shaped brush body is formed in the cavity. At the same time, the base hole is connected with the cavity. The upper bristles of the brush body are formed by the upper sheet group, and the lower bristles are formed by the lower sheet group. At the same time, the one-time molding of the brush body and the bristles is realized without secondary processing, which improves work efficiency and ensures the integrity of the bristles and the brush body.

[0029] 3. Positioning steps are set on both sides of each sheet unit. The outer positioning steps are limited and pressed in the vertical direction by limit bars. Adjacent sheet units are positioned by positioning blocks. By adjusting the protruding length of the fixed blocks on the base mold, the gap between the sheet units in the mold base is adjusted, and each sheet unit is constrained to be arranged neatly and smoothly in the mold cavity.

[0030] 4. By adopting the above-mentioned molding process, the brush head is molded from molten thermoplastic elastomer, which effectively improves the wear resistance and shock absorption of the brush head. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an exploded schematic diagram of the base mold of the present invention;

[0032] Figure 2 Another exploded schematic diagram of the base mold of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the upper sheet group / lower sheet group on the base mold of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the base mold of the present invention;

[0035] Figure 5 It is a schematic diagram of the combination of the sheet units of the present invention;

[0036] Figure 6 It is a structural schematic diagram of a sheet unit of the present invention;

[0037] Figure 7 is another structural schematic diagram of the sheet unit of the present invention;

[0038] Figure 8 is a schematic structural diagram of a sheet unit in another embodiment of the present invention;

[0039] In the figure: 1, base mold; 1.1, mold base; 1.2, sink seat; 2, upper sheet group; 3, lower sheet group; 4, sheet unit; 4.1, base hole; 4.2, molding convex part; 4.3, positioning step; 4.4, first hole part; 4.5, second hole part; 4.6, positioning edge; 5, limit strip; 6, fixed mold plate; 7, positioning block; 8, fixed block; 9, injection head; 10, movable insert; 11, brush head; DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0042] like Figure 1-7 As shown, a molding mold for an oral cleaning brush head comprises two base molds 1 which open and close to each other, and the two base molds 1 are closed to form a mold cavity for molding a brush head 11, and each base mold 1 is provided with a mold base 1.1 which is arranged in a fan-shaped manner, wherein the fan-shaped shape refers to a "U"-shaped, "C"-shaped, and "V"-shaped shape having an outer shape similar to the outline of a gum, and a molding component is arranged in the mold base 1.1, and the molding component comprises an upper sheet group 2 and a lower sheet group 3 which are composed of a plurality of sheet units 4, and the sheet units 4 are arranged in sequence in the mold base 1.1, and the sheet units 4 are equally divided and distributed in the mold base 1.1, that is, the sheet units 4 are also arranged in a fan-shaped manner, and the curvature of the outer wall of the sheet unit 4 is greater than or equal to the curvature of its inner wall, and at least two base holes 4.1 for molding bristles are opened in the sheet unit 4, and the upper sheet group 2 and the lower sheet group 3 form a mold cavity for molding a brush body in the mold cavity.

[0043] Specifically, the sheet unit 4 extends out of the die base 1.1 and is provided with a forming convex part 4.2. The forming convex part 4.2 is arranged in a "convex" shape. The base hole 4.1 is arranged on the contour side of the forming convex part 4.2 and is arranged背离 the cavity, that is, the base hole 4.1 is located on the end face of the concave part of the "convex" shape of the forming convex part 4.2. The protruding "convex" end face of the forming convex part 4.2 constitutes the forming surface of the bristles on the brush body. The forming convex parts 4.2 on the upper sheet group 2 and the lower sheet group 3 form a brush body with a cross-section in the shape of "I" in the die cavity, and the bristles are formed in the semi-surrounding concave cavity of the "I" shape, so as to limit the bristles to the cleaning working area of the brush head 11, ensure the cleaning effect, and increase the structural stability of the brush body. Moreover, the protruding end of the "convex" shape can be an arc part to form an "I" - shaped brush body with rounded corners.

[0044] Specifically, at least one positioning step 4.3 is arranged on both sides of the forming convex part 4.2. In this embodiment, the number of the positioning steps 4.3 is two. A limiting strip 5 is pressed on the outermost positioning step 4.3 of the die base 1.1. The limiting strip 5 is flush with the inner positioning step 4.3, and a fixed template 6 for enclosing the cavity is covered on the base die 1. The fixed template 6 is covered on the end face of the positioning step 4.3, making the sheet unit 4 more stable in the die base 1.1. At the same time, the step surface of the positioning step 4.3 provides a limiting part for the sheet unit 4 in the vertical direction. Through the pressing of the limiting strip 5 and the fixed template 6, the sheet units 4 in the die base 1.1 are arranged neatly, avoiding the deformation of the sheet unit 4 affecting the forming of the brush head 11.

[0045] Specifically, the base hole 4.1 has a first hole part 4.4 and a second hole part 4.5 along the axial direction. The first hole part 4.4 and the second hole part 4.5 have a tendency to converge towards the center along the axial direction, and the outer diameter of the smallest end of the first hole part 4.4 is larger than the outer diameter of the largest end of the second hole part 4.5. The first hole part 4.4 forms the root part for stabilizing the shape of the bristles, and the second hole part 4.5 forms the tip of the bristles for cleaning work, so that the tip of the bristles can be squeezed and bent on the root part, which is beneficial for demolding.

[0046] Specifically, a sunk seat 1.2 for forming part of the die base 1.1 is arranged in the base die 1. The sunk seat 1.2 is located in the middle of the die base 1.1 and is sunken relative to the two end parts of the die base 1. The part of the sheet unit 4 located in the middle of the die base 1.1 is provided with a positioning edge 4.6 corresponding to the sunk seat 1.2. The positioning edge 4.6 specifically extends along the bottom edge of the sheet unit 4, increasing the positioning effect and stability of the sheet unit 4 in the die base 1.1.

[0047] Such as Figure 5As shown, each sheet unit 4 is provided with a type of basic holes on both sides of the forming protrusion 4.2, and the number of the basic holes may be three and arranged along the contour, and the top end faces of the forming protrusions 4.2 of the sheet units 4 located at the two ends of the mold base 1.1 are provided with second types of basic holes, and the number of the basic holes may be gradually decreased along the contour of the mold base 1.1, and the top end portions of the forming protrusions 4.2 of the sheet units 4 located in the middle of the mold base 1.1 are not provided with the second type of basic holes; in other embodiments, the top end portions of the forming protrusions 4.2 of the sheet units 4 located in the middle of the mold base 1.1 may also be provided with the second type of basic holes, and the number of the basic holes may be gradually decreased along the contour of the mold base 1.1 to the middle of the mold base 1.1, or may be evenly arranged.

[0048] In this embodiment, the base hole 4.1 is arranged as a half hole on the sheet unit 4, and equal rows of bristles are formed between two adjacent sheet units 4, which facilitates the processing of the sheet units 4, facilitates demoulding, and reduces local deformation of the bristles during demoulding.

[0049] like Figure 8 As shown, as another embodiment of the present invention, the base holes 4.1 are arranged in a full circle on the sheet unit 4, and each sheet unit 4 forms equal rows of bristles on the brush body, thereby reducing manufacturing costs.

[0050] There are three base holes 4.1 on each sheet unit 4, two of which are inclined toward the middle of the sheet unit 4, and another base hole 4.1 extends out or is retracted between two of the base holes 4.1, so that the bristles on both sides are inclined toward the middle, giving the bristles a tendency to bend toward the middle, thereby avoiding plastic deformation of the bristles.

[0051] In other embodiments, the axial length of the first hole portion 4.4 on the insert piece unit 4 on the lower piece group 3 is greater than the axial length of the first hole portion 4.4 on the insert piece unit 4 on the lower piece group 3;

[0052] The axial length of the second hole portion 4.5 on the insert unit 4 on the lower sheet group 3 is smaller than the axial length of the first hole portion 4.4 on the insert unit 4 on the lower sheet group 3;

[0053] The maximum end outer diameter of the second hole portion 4.5 on the insert piece unit 4 on the lower piece group 3 is greater than the maximum end outer diameter of the second hole portion 4.5 on the insert piece unit 4 on the upper piece group 2;

[0054] The bristles on the brush body corresponding to the upper teeth are relatively soft and pointed, while the bristles on the brush body corresponding to the lower teeth are relatively coarse and hard. Since the gums of the lower teeth are more easily brushed when brushing, the gums of the lower teeth can withstand bristles with greater friction to achieve a cleaning effect; the gums of the upper teeth are not easily brushed, and tartar is easily formed there. The gums are relatively fragile, so pointed and soft bristles are used to clean the gums gently and gradually, reducing damage to the gums and bleeding.

[0055] Specifically, it also includes a discharge pipe, and discharge heads are respectively provided on both sides of the corresponding cavity of the discharge pipe, and half holes are provided on the upper and lower fixed templates corresponding to the discharge heads. The two half holes are closed to form a material channel connected to the cavity, and the discharge head is embedded in the material channel, which is conducive to the rapid molding of the brush head and the uniform distribution of the molten material of the brush head.

[0056] Specifically, the molding assembly also includes a positioning block 7 located at the end of the mold base 1.1 and a fixing block 8 constrained on the base mold 1. The positioning block 7 abuts against the outermost sheet unit 4. The fixing block 8 squeezes the positioning block 7 and eliminates the gap between the sheet units 4.

[0057] A molding process for an oral cleaning brush head, characterized in that it comprises the following steps:

[0058] a. An injection head 9 connected to one end of the middle portion of the cavity is disposed between the fixed mold plates 6, and a movable insert 10 connected to the other end of the middle portion of the cavity is disposed between the fixed mold plates 6;

[0059] b. Re-proportion material thermoplastic polyether elastomer 70A and thermoplastic polyether elastomer 80A, thermoplastic polyether elastomer 70A and thermoplastic polyether elastomer 80A ratio of 1: 2, adding masterbatch ratio of 2%;

[0060] c. The two base molds 1 are closed, and the movable insert 10 extends into the cavity.

[0061] d. Control the injection pressure at 38 MPa, maintain the injection temperature between 215°C and 220°C, set the injection time to 3s, and the injection head 9 outputs the molten thermoplastic elastomer in the cavity;

[0062] e. Adjust the back pressure to 38Pa, maintain pressure for 3s, and cool for 50s;

[0063] f. The movable insert 10 is removed from the cavity, and the two base molds 1 are opened.

[0064] From the perspective of processing and assembly, a base hole 4.1 is provided on the sheet unit 4 to form the bristles. The sheet unit 4 divides the fan-shaped mold cavity into equal parts, so that the bristles are neatly arranged on the brush body, which facilitates the arrangement and combination of the sheet unit 4. The sheet-like component is easy to process and form, which reduces the difficulty of mold manufacturing, thereby facilitating the neat demoulding of the bristles from the mold cavity, greatly improving the quality of the bristles.

[0065] Positioning steps 4.3 are arranged on both sides of each sheet unit 4, and the outer positioning steps 4.3 are limited and pressed in the vertical direction by the limiting strips 5. The adjacent sheet units 4 are positioned by the positioning blocks 7. By adjusting the extension length of the fixing blocks 8 on the base mold 1, the gap between the sheet units 4 in the mold base 1.1 is adjusted, and each sheet unit 4 is constrained to be neatly and stably arranged in the mold cavity.

[0066] From the perspective of brush body and bristle molding, the lower sheet group 3 is arranged on the lower base mold 1, the upper sheet group 2 is arranged on the upper base mold 1, the molding protrusion 4.2 of the sheet unit 4 extending from the mold base 1.1 and the fixed mold plate 6 enclose a cavity tending to be "U"-shaped, and a "U"-shaped brush body is molded in the cavity. At the same time, the base hole 4.1 is connected to the cavity, and the upper bristles of the brush body are molded by the upper sheet group 2, and the lower bristles are molded by the lower sheet group 3, and the one-time molding of the brush body and the bristles is realized at the same time, without the need for secondary processing, thereby improving work efficiency and ensuring the integrity of the bristles and the brush body;

[0067] In the above process, 70A and 80A refer to the hardness of the thermoplastic elastomer. By adopting the above molding process, the brush head 11 is molded from the molten thermoplastic elastomer, which effectively improves the wear resistance and shock absorption of the brush head 11.

[0068] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A molding die for an oral cleaning brush head, comprising two base molds (1) that open and close to each other, wherein the two base molds (1) are closed to form a mold cavity, Features: A die base (1.1) arranged in a fan shape is concavely disposed in the base die (1), a molding assembly is disposed in the die base (1.1), the molding assembly comprises an upper insert piece group (2) and a lower insert piece group (3) composed of a plurality of insert piece units (4), the insert piece units (4) are sequentially arranged in the die base (1.1), at least two base holes (4.1) for forming bristles are provided in the insert piece units (4), and the upper insert piece group (2) and the lower insert piece group (3) form a mold cavity for forming a brush body in the mold cavity; The insert piece unit (4) extends out of the mold base (1.1) and is provided with a molding convex portion (4.2); the base hole (4.1) is arranged on the contour side of the molding convex portion (4.2) and is arranged away from the mold cavity; and the protruding end surface of the molding convex portion (4.2) constitutes a constituting surface of the bristles on the brush body; At least one positioning step (4.3) is provided on both sides of the molding protrusion (4.2); a limiting strip (5) is pressed on the mold base (1.1) corresponding to the outermost positioning step (4.3); the limiting strip (5) is flush with the inner positioning step (4.3); and each base mold (1) is provided with a fixed mold plate (6) for enclosing the mold cavity; the fixed mold plate (6) is covered on the end surface of the positioning step (4.3); The base mold (1) is provided with a sink seat (1.2) for forming part of the mold base (1.1), and part of the insert piece unit (4) is provided with a positioning edge (4.6) corresponding to the sink seat (1.2); The molding assembly further comprises a positioning block (7) located at the end of the mold base (1.1) and a fixed block (8) constrained on the base mold (1), wherein the positioning block (7) abuts against the outermost insert sheet unit (4), and the fixed block (8) squeezes the positioning block (7) and eliminates the gap between the insert sheet units (4), and by adjusting the protruding length of the fixed block (8) on the base mold (1), each sheet unit (4) is constrained to be arranged neatly and smoothly in the mold cavity.

2. A molding die for an oral cleaning brush head according to claim 1, Features: The base hole (4.1) has a first hole portion (4.4) and a second hole portion (4.5) along the axial direction, the first hole portion (4.4) and the second hole portion (4.5) have a tendency to converge toward the center along the axial direction, and the minimum end outer diameter of the first hole portion (4.4) is greater than the maximum end outer diameter of the second hole portion (4.5).

3. A molding die for an oral cleaning brush head according to claim 2, Features: The base hole (4.1) is arranged in the form of a half hole or a full circle on the insert piece unit (4), and the base hole (4.1) forms bristles in equal rows on the brush body.

4. A molding die for an oral cleaning brush head according to claim 1, Features: It also includes a discharge pipe (9), wherein the discharge pipe (9) is provided with discharge heads on both sides of the corresponding cavity, and the upper and lower fixed mold plates (6) are provided with half holes corresponding to the discharge heads. The two half holes are closed to form an injection channel connected to the cavity, and the discharge head is embedded in the injection channel.

5. A molding die for an oral cleaning brush head according to claim 1, Features: The insert piece unit (4) is provided with a type of basic holes on both sides of the molding protrusion (4.2), and the type of basic holes on both sides are inclined relative to each other and point toward the middle of the insert piece unit (4), and at least a second type of basic holes are provided at the top of the molding protrusion (4.2) at the end of the mold base (1.1), and the second type of basic holes extend out or are retracted between the type of basic holes.

6. A molding process for an oral cleaning brush head, using the molding die for an oral cleaning brush head according to any one of claims 1 to 5, It is characterized in that The following steps are involved: a. A discharge pipe (9) is provided between the fixed mold plates (6) and communicates with both sides of the middle of the cavity, and a movable insert (10) is provided between the fixed mold plates (6) at the middle end of the cavity; b. Re-mix the materials in parts of thermoplastic polyether elastomer 70A and thermoplastic polyether elastomer 80A, and add the masterbatch ratio; c. The two base molds (1) are closed, and the movable insert (10) extends into the cavity; d. Control the injection pressure at 38 MPa, maintain the injection temperature between 215°C and 220°C, set the injection time to 3s, and the discharge pipe (9) outputs the molten thermoplastic elastomer in the cavity; e. Adjust the back pressure to 38Pa, maintain pressure for 3s, and cool for 50s; f. The movable insert (10) is removed from the cavity, and the two base molds (1) are opened.

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