CN101999798A

CN101999798A - Method for producing brushes, in particular toothbrushes

Info

Publication number: CN101999798A
Application number: CN2010102690361A
Authority: CN
Inventors: B·G·布舍里
Original assignee: GB Boucherie NV
Current assignee: GB Boucherie NV
Priority date: 2009-08-31
Filing date: 2010-08-30
Publication date: 2011-04-06
Anticipated expiration: 2030-08-30
Also published as: EP2298122A2; EP2298122A3; CN101999798B; DE102009039514A1; EP2298122B1

Abstract

The invention provides a method for producing brushes, in particular toothbrushes, In the first manufacturing step, one or more soft elastic elements and a carrier plate with holes for fiber bundles are formed in a double-component pressure injection mold. In the second manufacturing step, the soft elastic elements and the carrier plate with holes are placed into a bristle planting mold and the in the bristle planting mold, the fiber bundles are sent into the holes and fixed on the carrier plate. In the third manufacturing step, the soft elastic elements and the carrier plate with fixed fiber bundles are sent into the pressure injection mold and in the pressure injection mold, the brush body or a part of the brush body is molded at the carrier plate or local part of the carrier plate and the brush body are pressed and encapsulated together.

Description

Be used to make the especially method of toothbrush of brush

Technical field

The present invention relates to be used to make the especially method of toothbrush of brush.

Background technology

Past, bristle tuft or tow fixedly realizing on brush body by noose or metal anchoring sheet.In the method good without noose or anchoring sheet, tow so is fixed on the brush holder plate, and its stiff end is inserted in the hole of brush holder plate and is lived by melting welding overleaf.Utilize this " no anchor formula " method, tow can be processed according to any shape of cross section almost.People also often wish, except common bristle and tow, also cleaning element are incorporated into (for example cleaning element that is made of soft elastic material, pin, thin rod, small pieces etc.) in the hair brush area.For this reason, the brush holder plate is equipped with a plurality of additional holes or breach, in additional hole or breach, utilizes the pressure injection technology to inject soft elastic material.Structure and functional requirement to brush are high more, and complex and expensive is just got in the manufacturing of brush.

Summary of the invention

Utilize as the described the inventive method of follow-up claims, the advantage of injection manufacturing technology is united two into one with the advantage that no anchor does not have the technique for fixing of noose in other words, so that also can reasonably make complicated brush construction.

Description of drawings

Referring to obtaining other features and advantages of the present invention the explanation of accompanying drawing to a plurality of embodiment, accompanying drawing is depicted as from following:

Fig. 1 a, Fig. 1 b and Fig. 1 c represent a plurality of sequential step of the manufacture method among toothbrush first embodiment with vertical view;

Fig. 2 a, Fig. 2 b and Fig. 2 c are with the identical manufacturing step of perspective representation;

Fig. 3 a, Fig. 3 b and Fig. 3 c represent a plurality of sequential step of the manufacture method among toothbrush second embodiment with vertical view;

Fig. 4 a, Fig. 4 b and Fig. 4 c are with the identical manufacturing step of perspective representation;

Fig. 5 to Fig. 9 represents a plurality of sequential step in the improvement project of manufacture method illustrated in figures 1 and 2.

The specific embodiment

Three manufacturing steps according to brush of the present invention (is toothbrush at this) manufacture method have been shown in Fig. 1 a to Fig. 1 c.Fig. 1 a is the vertical view of the brush holder plate 10 that is made of hard relatively plastics, and this brush holder plate has whole oval in shape corresponding to head toothbrushes ground.The brush holder plate is formed by elastomeric material integratedly with the soft flexible member 12 of pin shape in bi-component pressure injection mould and is formed with a cocainine beam hole 14, and the arrangement in this tow hole is corresponding to desired bristle figure.Fig. 2 a is corresponding perspective view.

In second manufacturing step shown in Fig. 1 b and Fig. 2 b, brush holder plate 10 and soft flexible member 12 formed thereon are admitted to no anchor formula together and plant a mao mould.Planting in mao mould, tow 16 is inserted into tow hole 14 and is fixed on the brush holder plate 10, and its way is that the tow end that is pushed through of tow 16 is lived by melting welding by heating at brush holder backboard face.

In the 3rd manufacturing step shown in Fig. 1 c and Fig. 2 c, comprise that the brush holder plate 10 of soft flexible member 12 and fixing tow 16 is admitted to the die cavity of pressure injection mould, in this die cavity, the part of brush body 18 or brush body by pressure injection to brush holder plate 10.Brush body 18 can coat the outward flange of brush holder plate 10, thereby the brush holder plate is encapsulated in by local pressure injection with the plastic material of brush body.The 3rd manufacturing step can be finished by multicomponent pressure injection technology, and therefore, for example brush holder or brush holder support can be equipped with decoration, character string or the functor of liner.

In toothbrush embodiment illustrated in figures 1 and 2, the soft flexible member 12 of pin shape is placed on the outer longitudinal edge of brush holder plate 10 according to two groups four form.

In Fig. 3 and toothbrush embodiment shown in Figure 4, on brush holder plate 20, replace pin linear element ground to form the soft flexible member 22 of independent cross, this soft flexible member is inserted into tow 26 encirclements in tow hole 24.In others, manufacturing step is equal to the step of Fig. 1 and Fig. 2, thereby no longer repeats.

In Fig. 5 to Fig. 9, brush holder plate 110 is equipped with the outward flange 110a of rising, and has through hole that is used for the pin shape element 112 that is made of elastomeric material and the tow hole of running through 114 that is used for tow 116 with embodiment according to Fig. 1 and Fig. 2 the samely.As shown in Figure 5, the elastomeric material of element 112 constitutes the material strips 112a that links up, the stiff end of this material strips Connection Element 112 at the back side of brush holder plate 110.Fig. 6 also shows the tow 116 that adds in the tow hole 114, and the stiff end of tow constitutes the material layer 116a that links up by melting welding and at the back side of brush holder plate 110 subsequently as illustrated in fig. 7.Subsequently as shown in Figure 8, material layer 120 is added into that the outside is limited by the brush holder plate outward flange 110a that raises and in the volume that the bottom side is limited by material layer 116a and material strips 112a.Material layer 120 has the shutoff function that prevents that the plastification material from flowing out in manufacturing step subsequently, and wherein in described manufacturing step subsequently, to brush holder plate 110, perhaps the brush holder plate is encapsulated in brush holder support material pressure injection brush holder support 118 by pressure injection.The injection pressure that needs in this manufacturing step may cause the plastification material roughly to pour into remaining in the free space between tow 116 and the tow hole 114 when not utilizing material layer 120 shutoff, final even flow out at brush holder plate outer surface.By control and restriction injection pressure, can prevent this undesirable phenomenon, be the high injection pressure that meets expectation but will stand the strict process parameter and abandon for obtaining the best product quality.Injection moulding under high pressure and the material layer 120 that can be made of inessential material prevent reliably that when the pressure injection of brush holder support the injection material in the tow hole from flowing out, thereby this manufacturing step can carry out to transfer to best injection pressure.

In embodiment shown in Figure 9, material layer 120 is sealed by the material pressure injection of brush holder support 118 fully, therefore hides in brush.In other (not shown) embodiment, one or more surface regions of material layer 120 are not covered and can see and perhaps can expose with contacting by brush holder support, its way is, for example material layer 120 special color is arranged or special moulding is arranged, perhaps it is made of special material such as elastomer.

Claims

1. make the especially method of toothbrush of brush for one kind, wherein:

A) have a plurality of holes of being used for tow and be used at least one hole of soft flexible member or the brush holder plate of breach;

B) this soft flexible member is by forming through described hole or breach injection soft elastic material in the first pressure injection mould;

C) this tow is added in described a plurality of hole;

D) stiff end that is exposed by described a plurality of holes of this tow is fixed on this brush holder plate by melting welding;

E) this brush holder plate that comprises this soft flexible member and described tow is added in the second pressure injection mould, in the second pressure injection mould, at least a portion of brush body by pressure injection to this brush holder plate.

2. method according to claim 1, it is characterized in that, in first manufacturing step, this brush holder plate that comprises described at least one soft flexible member and a plurality of holes that are used for tow is in bi-component pressure injection die for molding, in second manufacturing step, comprise that described at least one soft flexible member is placed into no anchor formula with this brush holder plate that is used for a plurality of holes of tow and plants a mao mould, plant in mao mould in this no anchor formula, tow is admitted to described a plurality of hole and is fixed on this brush holder plate, in the 3rd manufacturing step, this brush holder plate of the tow that comprises described at least one soft flexible member and fixed is admitted to the pressure injection mould, in this pressure injection mould, on this brush holder plate, perhaps this brush holder plate portion ground is encapsulated in the brush body pressure injection part of brush body or brush body by pressure injection.

3. method according to claim 2 is characterized in that, this brush body is formed by various ingredients in multicomponent pressure injection mould.

4. according to each described method in the claim 1 to 3, it is characterized in that, in step b), a plurality of adjacent soft flexible members are injected into type by the corresponding hole or the breach of this brush holder plate, form the material strips that links up at this brush holder plate on the surface of described element.

5. according to each described method in the claim 1 to 4, it is characterized in that, after step d) and before step e), on the stiff end of the melting welding of this tow, apply a material layer, this material layer constitutes the plugging mechanism that prevents that the plastification material from going out through the orifice flow of described tow in step e).

6. brush toothbrush especially, comprise the brush holder plate that constitutes by plastics, the stiff end of fixing in the hole that is inserted into this brush holder plate of at least one soft flexible member and tow by the bi-component pressure injection on this brush holder plate is fixed on by melting welding on this brush holder plate, also comprises by pressure injection and seal the brush body that this brush holder plate forms to this brush holder plate or by the part pressure injection.

7. brush according to claim 6 is characterized in that, this brush holder plate is formed with surround an and breach that be used for a criss-cross soft flexible member of integral body in integral body a plurality of holes criss-cross, that be used to tow.

8. brush according to claim 6 is characterized in that, the soft flexible member of a plurality of pin shapes is encased inside the hair brush area that is made of a plurality of holes that are used for described tow, especially at its outward flange.

9. according to each described brush in the claim 6 to 8, it is characterized in that, a plurality of adjacent soft flexible members stretch out by the corresponding hole or the breach of this brush holder plate, and described a plurality of soft flexible members interconnect by material strips on the surface back to described element of this brush holder plate.

10. according to each described brush in the claim 6 to 9, it is characterized in that apply a material layer on the stiff end of the melting welding of described tow, this material layer to small part is imbedded in the material of this brush body.

11. according to each described brush in the claim 6 to 10, it is characterized in that this brush holder plate has the outward flange of rising, this outward flange is stretched the superb silk end of crossing melting welding.

12., it is characterized in that this material layer is tightly surrounded by the outward flange of the rising of this brush holder plate according to claim 10 or 11 described brushes.