CN212352751U

CN212352751U - Forming die for oral cavity cleaning brush head

Info

Publication number: CN212352751U
Application number: CN202021771954.XU
Authority: CN
Inventors: 徐国良
Original assignee: Cixi Jingcheng Mould Co ltd
Current assignee: Cixi Jingcheng Mould Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-01-15
Anticipated expiration: 2030-08-21

Abstract

The utility model discloses a forming die for an oral cleaning brush head, which comprises two base dies which are mutually opened and closed, wherein the two base dies form a die cavity, the base die is internally provided with a fan-shaped die holder in a concave manner, a forming assembly is arranged in the die holder and comprises an upper sheet group and a lower sheet group which are formed by a plurality of sheet units, the sheet units are sequentially arranged in the die holder, at least two base holes for forming bristles are arranged in the sheet units, the upper sheet group and the lower sheet group form a die cavity for forming the brush body in the die cavity, thereby set up the shaping brush hair of base hole on the piece unit, the piece unit is with fan-shaped die cavity partition for the brush hair is neatly arranged on the brush body, makes things convenient for the piece unit permutation and combination, and easy machine-shaping of slice component has reduced the mould and has made the degree of difficulty, thereby is favorable to the brush hair from the neat drawing of patterns in the die cavity, has improved the brush hair quality greatly.

Description

Forming die for oral cavity cleaning brush head

Technical Field

The utility model relates to a mould shaping technical field, concretely relates to forming die for oral cavity cleaning brush head.

Background

At present, a brush head forming die in the prior art usually forms a brush body firstly, bends the brush body through hot processing, forms bristles on the brush body on another component body through hot processing, and then connects the brush body with a bristle component body or forms the bristles through hot processing;

in summary, the brush head mold in the prior art has the following defects: 1. the brush body and the brush bristles are not integrally formed, so that the forming process is complicated; 2. the bristle forming effect is not good, and the bristles are twisted on the component body, which is not beneficial to cleaning; 3. the cleaning effect of the brush bristles is not good.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a forming die for U type brush head improves the shaping effect of the brush body and brush hair.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a forming die for oral cavity cleaning brush head, includes two basic moulds that open and shut each other, two the closed die cavity that constitutes of basic mould, the basic mould indent is equipped with the die holder that is fan-shaped setting, be equipped with the shaping subassembly in the die holder, the shaping subassembly includes last piece group and lower piece group that constitute by a plurality of piece units, the piece unit is arranged in the die holder in proper order, it is used for supplying two at least base holes of brush hair shaping to have seted up in the piece unit, and goes up piece group and lower piece group and constitute in the die cavity and be used for supplying the fashioned die cavity of brush body.

Further, the sheet unit stretches out of the die holder and is provided with a forming convex part, the base hole is arranged on the profile side of the forming convex part and deviates from the die cavity, the stretching end face of the forming convex part forms a forming face of the bristles on the brush body, through the improvement, the forming convex parts on the upper sheet group and the lower sheet group form the brush body with the cross section of the I-shaped cross section in the die cavity, and the bristles are formed in the semi-enclosed cavity of the I-shaped cross section, so that the bristles are limited to be concentrated in the cleaning working area of the brush head, the cleaning effect is guaranteed, and the structural stability of the brush body is improved.

Further, shaping convex part both sides are equipped with at least one location step, the die holder corresponds the location step top pressure in the outside and is equipped with spacing, just the base die upper cover is equipped with and is used for enclosing the fixed die plate of die cavity, through above improvement, the setting of location step for the piece unit is more firm in the die holder, and simultaneously, the step face of location step provides the spacing position of piece unit in vertical side, compresses tightly through spacing and fixed die plate, makes the piece unit in the die holder arrange neatly, avoids the piece unit to warp and influences the shaping of brush head.

Further, the base hole is provided with a first hole part and a second hole part along the axial direction, the first hole part and the second hole part have the tendency of being gathered towards the center along the axial direction, the outer diameter of the minimum end of the first hole part is larger than the outer diameter of the maximum end of the second hole part, through the improvement, the first hole part forms the base part stabilizing the appearance of the bristles, and the second hole part forms the bristles for cleaning, so that the bristles can be extruded and bent on the base part, and demolding is facilitated.

Preferably, the axial length of the first hole portion of the insert piece unit on the lower piece group is greater than the axial length of the first hole portion of the insert piece unit on the lower piece group;

the axial length of a second hole part on the insert piece unit on the lower piece group is smaller than that of a first hole part on the insert piece unit on the lower piece group;

the maximum end outer diameter of a second hole part on the insert piece unit on the lower piece group is larger than that of the second hole part on the insert piece unit on the upper piece group;

the brush hair corresponding to the upper jaw teeth on the brush body is soft and sharp, and the brush hair corresponding to the lower jaw teeth on the brush body is thick and hard, so that the gum of the lower jaw teeth can be brushed more easily during tooth brushing, and the gum of the lower jaw teeth can bear the brush hair with higher friction force, so that the cleaning effect is achieved; the gum of palatal tooth is difficult to be brushed, and it produces dental calculus easily, and gum part is comparatively fragile, adopts sharp soft brush hair, and gentle gradual cleanness to the gum reduces the damage and the hemorrhage phenomenon to the gum.

Preferably, the base holes are arranged in the half holes on the sheet units, and the equal rows of bristles are formed between every two adjacent sheet units.

Preferably, the base holes are arranged in a full circle on the sheet units, and each sheet unit forms equal rows of bristles on the brush body, so that the manufacturing cost is reduced through the improvement.

Further, still include the discharging pipe, the discharging pipe corresponds the die cavity both sides and is equipped with out the stub bar respectively, two from top to bottom correspond out the stub bar on the fixed die plate and all be equipped with half hole, two the closed material way that constitutes and die cavity intercommunication of half hole, in the stub bar inlays to be located the material way, through above improvement, be favorable to brush head rapid prototyping, brush head melt distribution is even.

Furthermore, the two sides of the forming convex part on the sheet unit are provided with a first type of base holes, the first type of base holes on the two sides are opposite to the middle part of the sheet unit in an inclined mode, at least the top end of the forming convex part on the end part of the die holder is provided with a second type of base holes, and the second type of base holes extend out of or are contained between the first type of base holes.

Furthermore, a sinking seat used for forming part of the die holder is arranged in the base die, and a positioning edge is arranged on part of the sheet unit corresponding to the sinking seat.

Furthermore, the forming assembly further comprises a positioning block positioned at the tail end of the die holder and a fixing block constrained on the base die, the positioning block abuts against the outermost side sheet unit, and the fixing block extrudes the positioning block and eliminates a gap between the sheet units.

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

a. an injection molding head communicated with one end of the middle part of the cavity is arranged between the fixed mold plates, and a movable insert communicated with the other end of the middle part of the cavity is arranged between the fixed mold plates;

b. proportionally mixing the thermoplastic polyether elastomer 70A and the thermoplastic polyether elastomer 80A in parts, and adding color master batch in proportion;

c. the two base molds are closed, and the movable insert extends into the cavity;

d. controlling the injection pressure to be 38mpa, keeping the injection temperature between 215 ℃ and 220 ℃, setting the injection time to be 3s, and outputting the molten thermoplastic elastomer in the cavity by the injection head;

e. adjusting the back pressure to 38pa, maintaining the pressure for 3s, and cooling for 50 s;

f. the movable insert is separated from the cavity, and the two base molds are opened.

Compared with the prior art, the utility model has the advantages of it is following and beneficial effect:

1. the base holes are formed in the sheet units to form bristles, and the fan-shaped die cavities are equally divided by the sheet units, so that the bristles are orderly arranged on the brush body, the sheet units are convenient to arrange and combine, the sheet members are easy to machine and form, the difficulty in manufacturing the die is reduced, the bristles are convenient to demould from the die cavities in order, and the quality of the bristles is greatly improved;

2. the lower sheet set is arranged on the lower base die, the upper sheet set is arranged on the upper base die, the forming convex part of the sheet unit extending out of the die holder and the fixed die plate are enclosed to form a cavity tending to a U shape, a U-shaped brush body is formed in the cavity, meanwhile, the base hole is communicated with the cavity, the brush body forms upper brush bristles through the upper sheet set, the lower brush bristles are formed through the lower sheet set, and meanwhile, the one-time forming of the brush body and the brush bristles is realized in an integrated mode without secondary processing, so that the working efficiency is improved, and the integrity of the brush bristles and the brush body is ensured;

3. the two side parts of each sheet unit are provided with positioning steps, the outer side positioning steps are limited and compressed in the vertical direction through limiting strips, adjacent sheet units are positioned through positioning blocks, and the extending length of the fixing blocks on the base die is adjusted, so that the gaps between the sheet units in the die holder are adjusted, and each sheet unit is restrained to be neatly and stably arranged in the die cavity.

4. By adopting the molding process, the brush head is molded by the fused thermoplastic elastomer, so that the wear resistance and the shock absorption of the brush head are effectively improved.

Drawings

Fig. 1 is an exploded view of the base mold of the present invention;

fig. 2 is another exploded view of the base mold of the present invention;

fig. 3 is a schematic structural view of the upper plate set/lower plate set of the present invention on the base mold;

fig. 4 is a schematic structural view of the base mold of the present invention;

FIG. 5 is a schematic view of the combination of the sheet units of the present invention;

fig. 6 is a schematic structural view of the sheet unit of the present invention;

fig. 7 is another schematic structural view of the sheet unit of the present invention;

fig. 8 is a schematic structural view of a sheet unit according to another embodiment of the present invention;

in the figure: 1. a base mold; 1.1, a die holder; 1.2, sinking a seat; 2. feeding a sheet group; 3. arranging a sheet group; 4. a sheet unit; 4.1, base hole; 4.2, forming a convex part; 4.3, positioning a step; 4.4, a first hole portion; 4.5, a second hole part; 4.6, positioning edges; 5. a limiting strip; 6. fixing a template; 7. positioning blocks; 8. a fixed block; 9. an injection head; 10. a movable insert; 11. a brush head;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that, although the terms upper, middle, lower, top, end, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another for ease of understanding, and are not used to define any direction or order of limitation.

As shown in fig. 1-7, a forming mold for oral cleaning brush head comprises two base molds 1 which are opened and closed with each other, the two base molds 1 are closed to form a mold cavity for forming the brush head 11, a fan-shaped mold seat 1.1 is concavely arranged in each base mold 1, wherein, the fan-shaped refers to a U-shaped, C-shaped and V-shaped shape similar to the outline of the gum, a forming component is arranged in the die holder 1.1 and comprises an upper sheet group 2 and a lower sheet group 3 which are composed of a plurality of sheet units 4, the sheet units 4 are sequentially arranged in the die holder 1.1, and the sheet units 4 are equally distributed and fully distributed in the die holder 1.1, the sheet unit 4 is also in a fan shape, the radian of the outer wall of the sheet unit 4 is larger than or equal to the radian of the inner wall of the sheet unit, at least two base holes 4.1 for forming bristles are formed in the sheet unit 4, and the upper sheet set 2 and the lower sheet set 3 form a cavity for forming a brush body in the cavity.

Specifically, the sheet unit 4 is provided with a forming convex portion 4.2 extending out of the die holder 1.1, the forming convex portion 4.2 is arranged in a shape of a convex, the base hole 4.1 is arranged on the profile side of the forming convex portion 4.2 and is arranged away from the die cavity, namely, the base hole 4.1 is positioned on the end surface of the concave portion of the shape of the convex of the forming convex portion 4.2, the extending end surface of the shape of the convex of the forming convex portion 4.2 forms a forming surface of the brush hair on the brush body, the forming convex portions 4.2 on the upper sheet group 2 and the lower sheet group 3 form the brush body with an I-shaped cross section in the die cavity, and the brush hair is formed in the semi-enclosed cavity of the I-shaped, so that the brush hair is limited to be concentrated in the cleaning working area of the brush head 11, the cleaning effect is ensured, the structural stability of the brush body is increased, and the protruding end portion of the shape of the convex can be an.

Specifically, at least one positioning step 4.3 is arranged on two sides of the forming convex portion 4.2, in this embodiment, the number of the positioning steps 4.3 is two, a limiting strip 5 is pressed on the positioning step 4.3 on the outermost side corresponding to the die holder 1.1, the limiting strip 5 is flush with the positioning step 4.3 on the inner side, a fixed die plate 6 for enclosing a cavity is arranged on the upper cover of the base die 1, the fixed die plate 6 is covered on the end face of the positioning step 4.3, so that the sheet unit 4 is more stable in the die holder 1.1, meanwhile, the step face of the positioning step 4.3 provides a limiting position of the sheet unit 4 in the vertical direction, and the sheet unit 4 is pressed tightly by the limiting strip 5 and the fixed die plate 6, so that the sheet units 4 in the die holder 1.1 are arranged neatly, and the deformation of the sheet unit.

Specifically, the base hole 4.1 is provided with 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 the tendency of being folded towards the center along the axial direction, the minimum end outer diameter of the first hole portion 4.4 is larger than the maximum end outer diameter of the second hole portion 4.5, the first hole portion 4.4 forms a base portion for stabilizing the appearance of the bristles, and the second hole portion 4.5 forms a bristle tip for cleaning, so that the bristle tip can be extruded and bent on the base portion, and demolding is facilitated.

Specifically, a sinking seat 1.2 used for forming a part of the die holder 1.1 is arranged in the base die 1, the sinking seat 1.2 is positioned in the middle of the die holder 1.1 and is sunk relative to two end parts of the die holder 1.1, a positioning edge 4.6 is arranged on a part of the die unit 4 positioned in the middle of the die holder 1.1 corresponding to the sinking seat 1.2, the positioning edge 4.6 specifically extends along the bottom edge of the die unit 4, and the positioning effect and the stability of the die unit 4 in the die holder 1.1 are improved.

As shown in fig. 5, two sides of the forming convex portion 4.2 on each sheet unit 4 are provided with one type of base holes, the number of which can be three, arranged along the profile, and the end surfaces of the top ends of the forming convex portions 4.2 of the sheet units 4 on the two end portions of the die holder 1.1 are provided with two types of base holes, the number of which can be gradually reduced along the profile of the die holder 1.1, and the end portions of the top ends of the forming convex portions 4.2 of the sheet units 4 on the middle portion of the die holder 1.1 are not provided with two types of base holes; in other embodiments, two types of base holes may also be provided at the top end of the forming protrusion 4.2 of the sheet unit 4 located at the middle of the die holder 1.1, and the number of the base holes may gradually decrease to the middle of the die holder 1.1 along the profile of the die holder 1.1, or may be uniformly arranged.

In this embodiment, the base holes 4.1 are arranged in half holes on the sheet units 4, and the equal rows of bristles are formed between two adjacent sheet units 4, so that the sheet units 4 can be conveniently processed, demolding is facilitated, and local deformation of the bristles during demolding is reduced.

As shown in fig. 8, 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 the manufacturing cost.

The number of the base holes 4.1 on each sheet unit 4 is three, wherein two base holes 4.1 are obliquely directed to the middle of the sheet unit 4, and the other base hole 4.1 extends out of or is contained between the two base holes 4.1, so that the bristles on the two sides are obliquely directed to the middle, the bristles are given a tendency to bend towards the middle, and plastic deformation of the bristles is avoided.

In other embodiments, the axial length of the first bore section 4.4 in the insert piece unit 4 on the lower stack 3 is greater than the axial length of the first bore section 4.4 in the insert piece unit 4 on the lower stack 3;

the axial length of the second bore section 4.5 in the insert piece unit 4 on the lower piece nest 3 is smaller than the axial length of the first bore section 4.4 in the insert piece unit 4 on the lower piece nest 3;

the maximum end outer diameter of a second hole part 4.5 on the insert piece unit 4 on the lower piece group 3 is larger than the maximum end outer diameter of a second hole part 4.5 on the insert piece unit 4 on the upper piece group 2;

The material outlet pipe is arranged on the two sides of the corresponding cavity, the material outlet heads are arranged on the upper fixed die plate and the lower fixed die plate, the material outlet heads are arranged on the two upper fixed die plates and the two lower fixed die plates, the two half holes are closed to form a material channel communicated with the cavity, the material outlet heads are embedded in the material channel, the quick forming of the brush head is facilitated, and the molten material of the brush head is uniformly distributed.

Specifically, the forming assembly further comprises a positioning block 7 located at the tail end of the die holder 1.1 and a fixing block 8 constrained on the base die 1, the positioning block 7 abuts against the outermost side sheet unit 4, and the fixing block 8 extrudes the positioning block 7 and eliminates gaps among the sheet units 4.

A molding process for an oral cleaning brush head is characterized by comprising the following steps:

a. an injection molding head 9 communicated with one end of the middle part of the cavity is arranged between the fixed mold plates 6, and a movable insert 10 communicated with the other end of the middle part of the cavity is arranged between the fixed mold plates 6;

b. the material thermoplastic polyether type elastomer 70A and the thermoplastic polyether type elastomer 80A are proportioned according to parts, the ratio of the thermoplastic polyether type elastomer 70A to the thermoplastic polyether type elastomer 80A is 1:2, and the color master batch is added according to the proportion of 2 percent;

c. the two base molds 1 are closed, the movable insert 10 extends into the cavity,

d. controlling the injection pressure to be 38mpa, keeping the injection temperature between 215 ℃ and 220 ℃, setting the injection time to be 3s, and outputting the molten thermoplastic elastomer in the cavity by the injection head 9;

f. the movable insert 10 is taken out of the cavity, and the two base molds 1 are opened.

From the angle of processing and assembly, the base holes 4.1 are formed in the sheet units 4 so as to form bristles, the fan-shaped die cavities are equally divided by the sheet units 4, so that the bristles are orderly arranged on the brush body, the sheet units 4 are convenient to arrange and combine, the sheet members are easy to process and form, the difficulty in manufacturing the die is reduced, the bristles are favorably and orderly demoulded from the die cavities, and the bristle quality is greatly improved;

two side parts of each sheet unit 4 are provided with positioning steps 4.3, the outer positioning steps 4.3 are limited and pressed in the vertical direction through limiting strips 5, adjacent sheet units 4 are positioned through positioning blocks 7, and the extending length of the fixing block 8 on the base die 1 is adjusted, so that the gap between the sheet units 4 in the die holder 1.1 is adjusted, and each sheet unit 4 is restrained to be neatly and stably arranged in the die cavity;

from the angle of forming the brush body and the bristles, the lower plate group 3 is arranged on the lower base die 1, the upper plate group 2 is arranged on the upper base die 1, the plate unit 4 extends out of a forming convex part 4.2 on the die holder 1.1 to form a cavity tending to a U shape with the fixed die plate 6 in an enclosing mode, the U-shaped brush body is formed in the cavity, meanwhile, the base hole 4.1 is communicated with the cavity, the brush body forms the upper bristles through the upper plate group 2, the lower bristles are formed through the lower plate group 3, the one-step forming of the brush body and the bristles is realized at the same time, secondary processing is not needed, the working efficiency is improved, and the integrity of the bristles and the brush body is ensured;

in the above process, 70A and 80A refer to the hardness of the thermoplastic elastomer, and by adopting the above molding process, the brush head 11 is molded from the molten thermoplastic elastomer, so that the wear resistance and the shock absorption of the brush head 11 are effectively improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a forming die for oral cavity cleaning brush head, includes two basic moulds (1) that open and shut each other, two the closed die cavity that constitutes of basic mould (1), its characterized in that: the base die (1) is provided with a fan-shaped die holder (1.1) in an inwards concave manner, a forming assembly is arranged in the die holder (1.1), the forming assembly comprises an upper insert piece group (2) and a lower insert piece group (3) which are formed by a plurality of insert piece units (4), the insert piece units (4) are sequentially arranged in the die holder (1.1), at least two base holes (4.1) for bristle forming are formed in the insert piece units (4), and the upper insert piece group (2) and the lower insert piece group (3) form a cavity for brush forming in the die cavity.

2. The forming die for the oral cleaning brush head according to claim 1, wherein: the insert piece unit (4) is provided with a forming convex part (4.2) extending out of the die holder (1.1), the base hole (4.1) is arranged on the profile side of the forming convex part (4.2) and is arranged away from the die cavity, and the extending end face of the forming convex part (4.2) forms a forming face of bristles on the brush body.

3. A mold for forming an oral cleaning brush head according to claim 2, wherein: at least one positioning step (4.3) is arranged on two sides of the forming convex part (4.2), a limiting strip (5) is arranged on the die holder (1.1) corresponding to the positioning step (4.3) on the outermost side in an upward pressing mode, and each base die (1) is provided with a fixed die plate (6) used for enclosing the die cavity.

4. The forming die for the oral cleaning brush head according to claim 1, wherein: the base hole (4.1) is provided with 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 the tendency of converging towards the center along the axial direction, and the minimum end outer diameter of the first hole part (4.4) is larger than the maximum end outer diameter of the second hole part (4.5).

5. The forming die for the oral cleaning brush head according to claim 4, wherein: the base holes (4.1) are arranged on the insert piece unit (4) in a half-hole or full circle mode, and the base holes (4.1) form equal rows of bristles on the brush body.

6. A mold for forming an oral cleaning head according to claim 3, wherein: still include discharging pipe (9), discharging pipe (9) correspond the die cavity both sides and are equipped with out the stub bar respectively, two from top to bottom correspond on fixed die plate (6) and go out the stub bar and all be equipped with half hole, two half hole closure constitutes the passageway of moulding plastics with the die cavity intercommunication, it inlays to locate in the passageway of moulding plastics to go out the stub bar.

7. A mold for forming an oral cleaning brush head according to claim 2, wherein: one type of base holes are formed in the insert piece unit (4) and located on two sides of the forming convex portion (4.2), the opposite slopes of the one type of base holes on the two sides point to the middle of the insert piece unit (4), at least two types of base holes are formed in the top end of the forming convex portion (4.2) on the end portion of the die holder (1.1), and the two types of base holes extend out of or are contained between the one type of base holes.

8. The forming die for the oral cleaning brush head according to claim 1, wherein: the die is characterized in that a sinking seat (1.2) for forming part of the die holder (1.1) is arranged in the base die (1), and a positioning edge (4.6) is arranged on part of the insert piece unit (4) corresponding to the sinking seat (1.2).

9. The forming die for the oral cleaning brush head according to claim 1, wherein: the forming assembly further comprises a positioning block (7) located at the tail end of the die holder (1.1) and a fixing block (8) constrained on the base die (1), the positioning block (7) abuts against the outermost side insert piece unit (4), and the fixing block (8) extrudes the positioning block (7) and eliminates gaps among the insert piece units (4).