DE19959209A1 - Plastic bristles for the washing brushes of automatic washing systems - Google Patents

Abstract

The invention is directed to plastic bristles for the washing brushes of automatic car washes that work with moving brushes, the bristles being hollow profile bristles. The hollow profile bristles preferably have a diameter of 0.5 to 5 mm and a round or oval cross section.

Description

The invention relates to plastic bristles for the washing brushes of automatic car washes that are moving with Brushes work.

Plastic bristles for washing brushes in automatic washing systems, those with moving, generally rotating brushes work, usually have a cross profile. Such Bristles are, for example, in DE-Z "damage to cars varnish when washing with synthetic bristles "(special print ATZ Automobiltechnische Zeitschrift, 71st year, No. 10/1969) described. This cross profile should cause the paint surface of a vehicle when washing in automatic car washing systems is less stressed.

However, it has been shown that especially when it was bad car washes in the cracks of such boron Most dust and dirt particles that can cause a Lead paint damage.

An important contribution to better roller-shaped wash brushes DE-B 39 36 922, which special cross sections in a special arrangement for the direction of the washing brush for Had subject.

From DE-A 197 41 899.6 plastic bristles for washing brushes known from automatic car washes where the commonly used LDPE by the polyester PBT is set, the addition of 1 to 25% polyurethane may contain. This should ent when washing with LDPE standing gray veil (polymer abrasion) can be prevented.

Despite these improvements, it does so in car washes as before slightly before that the paint of the washed vehicles ver is scratched.

The invention is therefore based on the object, the above solve the mentioned problem. In particular, the risk of  Scratching the car paint of washed vehicles while washing be reduced in car washes.

This task is done by plastic bristles for the washing brushes of automatic car washes that are moving with Brushes work, solved by using bristles, which are hollow profile bristles.

The plastic bristles according to the invention are thus hollow profile boron most. They preferably have a round or oval cross cut. The diameter of these bristles is preferably ser, with an oval cross-section this is the extension in the direction the longest axis, 0.5 to 5 mm, preferably 0.5 to 1.5 mm.

Such bristles have the following advantages:
On the one hand, these bristles have the same diameter as the commonly used full-profile bristles (1.0 to 2.0 mm) less mass. This means that when washing in the car wash, the impact energy of the bristles on the paint is low. Scratches are less likely.

Second, such profile bristles according to the invention in Ver similar stiffness to full profile bristles. One of the Good stiffness is important because most car washes can be controlled via the contact pressure of the brush. If the Ela plastic bristle modulus, d. H. the Stiffness, i.e. too low, is how the control system works System no longer correct. The advantage of the invention Hollow profile bristles are therefore much smaller in mass compared to the full profile with a similar stiffness of the profile bristle.

Furthermore, hollow profile bristles deform on impact the body is elastic in contrast to full profile bristles. In combination with the lower mass, this leads to less Scratches on car paints.  

The plastic bristles according to the invention can be made from any commonly used materials, such as LDPE, or polyester, in particular PBT with an addition of 1 to 25 wt .-% polyurethane be made.

Preferred materials for the plastic boron according to the invention Most are polyamides or polyesters, preferably polyamides, which are selected from the group PA-6, PA-66, PA-610, PA-612. Of course, such materials can also be used in combination with used each other. Other preferred materials are Polyester, especially PBT, preferably with that already mentioned Addition of polyurethane.

The plastic bristles according to the invention are preferably used in the brush used that the orientation of the bristle assembly or the bristle set transverse to a direction of rotation of the office is selected.

The hollow profile bristles according to the invention can have all shapes. However, preference is given to forms, as shown in the attached appended Fig. 1 to Fig. 8 in which case only the simplicity of the outer circumferential line of the cross-section is shown for simplicity.

The figures show:

Fig. 1 shows rectangular cross sections of the bristles;

Fig. 2 shows a symmetrical lens cross section. It is an oval or symmetrical cross-section, which should be regarded as preferred.

According to FIG. 3, elliptical cross sections are possible, ie cross sections that are not symmetrical, but in which a small and a large axis are clearly formed.

Fig. 4 shows a rectangular cross section with rounded corners;

Fig. 5 shows a loaf of bread cross section, which has a straight base, but a curved hood surface.

Fig. 6 shows a diamond cross section, in which, in turn, the longitudinal extent is transverse to the vector of the circumferential speed R 'and

Fig. 7 shows an arched cross section, in which the cross-sectional underside is straight. A symmetrical cross section on both sides is also possible.

Fig. 8 shows a round cross section.

Claims (6)

1. Plastic bristles for the washing brushes of automatic car washes that work with moving brushes, characterized in that the bristles are hollow profile bristles. 2. Plastic bristles according to claim 1, characterized characterized in that the hollow profile bristles egg have a round or oval cross-section. 3. Plastic bristles according to claim 1 or 2, there characterized in that the hollow profile boron most in cross section a diameter in ih longest direction from 0.5 to 5 mm point. 4. Plastic bristles according to one of the previous ones the claims, characterized in that the material of the hollow profile bristles selected is from the group consisting of LDPE, poly propylene, polyamides, preferably PA-6, PA-66, PA-610 or PA-612, polyesters, preferred PBT. 5. Plastic bristles according to one of the previous ones the claims, characterized in that the orientation of the bristle assembly or of the bristle set transverse to a rotation direction of the brushes is selected. 6. Plastic bristles according to one of the previous ones the claims, characterized in that the bristles at the end of a bristle band  stick out or the bristles in the middle to egg Nem band-like structures are summarized.