CN1498087A - Brushes for automatic washing systems of motor vehicles - Google Patents

Abstract

The present invention relates to a brush which has been specifically designed for automatic motor vehicle washing systems, which comprises a bristle supporting layer (1) which can be wound about a shaft. The main feature of the invention is that the bristles (2) are made by extruding a closed cell foamed plastics material.

Description

Brushes for automatic washing systems of motor vehicles

technical field

The invention relates to a brush specially designed for the automatic cleaning system of motor vehicles.

Background technique

As is generally known, brushes conventionally used in automatic vehicle washing systems or the like generally comprise a rod provided with a layer supporting a plurality of scattered bristles.

The bristles of the brushes are usually made of extruded plastic components with a relatively high weight, so that the kinetic energy of the rotating bristles actually causes many micro-shocks between the cleaning brush and the motor vehicle body.

Thus, plastic particles from the bristles of the brushes may adhere to the motor vehicle body.

Furthermore, it is difficult to obtain proper contact of the bristles with the vehicle body using existing cleaning brushes.

In order to solve the above-mentioned problems, there is now a sensor that displaces the brush bar to follow the contour (travel) of the vehicle being cleaned when the current of the brush drive motor increases.

However, because of the high kinetic energy of the bristle balls, the above-mentioned solution may cause very sudden displacements of the cleaning brush and make cleaning difficult.

In addition, bristles with high kinetic energy tend to wrap around protruding parts of the vehicle, such as rear view mirrors, antennas or the like, with the result that the bristles in contact with said protruding parts of the vehicle break.

Contents of the invention

Therefore, the object of the present invention is to overcome the above-mentioned disadvantages by providing a cleaning brush specially designed for automatic cleaning systems of motor vehicles, adapted to provide a very gentle contact between the bristles and the surface of the motor vehicle to be cleaned, so as to prevent motor the occurrence of any damage to the vehicle body.

Within the scope of the aforementioned aims, the main object of the present invention is to provide a bristle comprising very light weight, thereby preventing any plastic particles from adhering to the motor vehicle body.

Another object of the present invention is to provide a cleaning brush whose bristles have a greatly reduced kinetic energy due to their light weight, so as to prevent said bristles from being entangled and or entangled in the protruding parts of the vehicle being cleaned.

A further object of the invention is to provide a brush which is very reliable and safe to operate.

According to one aspect of the present invention, the above objects and objects are achieved, as will other objects which will become more apparent, by a brush for use in an automatic washing system for motor vehicles comprising a brush which can be wrapped around a rod The bristle support layer is characterized in that the bristles are made of extruded closed-cell foam.

Description of drawings

Further features and advantages of the present invention will become more apparent through the following detailed description of a preferred but not exclusive embodiment of a cleaning brush designed for an automatic cleaning system for motor vehicles, as shown in the accompanying drawings Indicated but non-limiting examples to illustrate where:

Figure 1 is a schematic diagram of a bristle support layer incorporated into a cleaning brush according to the present invention.

Figure 2 is a schematic diagram of a bristle having a relatively double trapezoidal shape.

Figure 3 is a bristle showing a square shape.

Figure 4 is a bristle showing a rectangular shape.

Figure 5 is a bristle showing a circular shape.

Figure 6 is a bristle showing an oval shape.

Detailed ways

With reference to the numerals in the above figures, according to the present invention, the cleaning brush specially designed for the automatic washing system of motor vehicles comprises a bristle support layer 1 formed by bending or folding on itself to connect its end parts The strip composition is advantageous, surrounding the brush shaft.

In this way, a cleaning brush is easily produced by combining several wound strips.

As shown, extending from the support layer 1 are a plurality of bristles, designated 2 . The main feature of these bristles is that they are made of extruded closed-cell plastic, such as foamed polyethylene or polypropylene.

The use of foam results in a substantial reduction in the weight of the bristles, which provides optimum results both in terms of impact of the bristles on the motor vehicle body and sensors that automatically sense the operation of the washer brushes.

In fact, due to the low weight of the closed-cell bristles, they do not absorb water, so when they come into contact with the motor vehicle body, they strike the brush bar control sensor in a very gentle way, thus properly controlling the vertical and horizontal displacement of the brush, To provide optimum cleaning and overall control of the cleaning system.

The bristles are advantageously excluded by using a foaming agent which is supplied to the extruder and mixed with the plastic in a weight ratio of 1% to 4%.

In this regard, it should be noted that, as a blowing agent, a modified azodicarbonamide dispersed in high-fluidity polyethylene can be used.

Thus, by using modified azodicarbonamides as blowing agents, it is possible to obtain controlled foaming without negatively affecting the mechanical properties and surface appearance of the extruded plastic.

If modified azodicarbonamide is used, its usage is 1.5%-2% by weight.

The optimum foaming temperature range is between 160°C and 190°C, depending on the type of polymer used, the type of extruder, and the extrusion temperature profile.

The best results have been achieved using a temperature profile or pattern as follows:

140°C: Feed area;

175°C-180°C: Central area of the extruder;

160°C: Head of extruder.

The above temperature can be varied within the range of ±15%.

It should be pointed out that the active part of the above-mentioned modified azodicarbonamide will be decomposed with the segregation of inert gas, and will not change the properties of other conventionally added materials.

In particular, this product is insensitive to heat and humidity and can be stored for 8-10 months.

The densities of commonly obtained bristles traditionally cover the range of 300kg-700kg/m ³ .

The bristles can be of any shape or pattern, depending on the intended application.

In this way, it is possible to provide bristles 2a with a double trapezoidal cross-section.

Furthermore, it is also possible to provide bristles with arbitrarily shaped cross-sections, as disclosed below.

For example, it is possible to provide bristles 2b of square shape, bristles of rectangular shape or cross-section 2c, bristles of circular cross-section 2d and bristles of oval cross-section 2e.

From the foregoing, it can be seen that the present invention apparently fully achieves the intended aims and objectives.

Particularly to be pointed out is the fact that the already provided bristles, having a small density, are sensitive to substantially reducing the occurrence of impacts when the bristles impinge on the motor vehicle body, thus preventing any bristle plastic particles from adhering to said motor vehicle body, thereby Provides greatly improved cleaning results.

As disclosed, the present invention may have some modifications and changes, all of which belong to the scope of the present invention.

Furthermore, all structural elements may be replaced by other technically equivalent elements.

To carry out the invention, the structural elements can be arbitrary, as is the size and shape of the non-essential, depending on the requirements.

Claims (15)

1, a kind of brush that is used for automatic washing system of motor vehicle comprises the bristle supporting course that can be paperwrapped on the bar, it is characterized in that: this bristle is made by the extruding closed cell foamed plastic.

2, the brush that is used for automatic washing system of motor vehicle according to claim 1, it is characterized in that: the plastics that form this bristle comprise polyethylene.

3, according to claim 1 and the 2 described brushes that are used for automatic washing system of motor vehicle, it is characterized in that: the plastics that form this bristle comprise polypropylene.

4, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: weight ratio is that the blowing agent of 1%-4% is used in the extrusion process of this bristle.

5, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: the density of this foamed plastic bristle is 300-70kg/m ³

6, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: the density of this foamed plastic bristle is 500kg/m ³

7, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this bristle has relative double trapezoid cross section.

8, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: make this bristle by using modified azodicarbonamide to be scattered in as blowing agent in the polyethylene of high fluidity.

9, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this blowing agent blowing temperature is 160 ℃-190 ℃, depends on the operating temperature pattern of polymer, extruder and this extruder of use.

10, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this bristle is formed by the extruder extruding that use has following temperature model:

140 ℃: feed zone;

175 ℃-180 ℃: the center of extruder;

160 ℃: the head of extruder.

Described temperature can change in ± 15% scope, depends on the plastics of use.

11, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this bristle has square cross section.

12, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this bristle has rectangular cross section.

13, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this bristle has circular cross section.

14, according to each described brush that is used for automatic washing system of motor vehicle in the aforementioned claim, it is characterized in that: this bristle has oval cross section.

15, according in the aforementioned claim each described for predeterminated target and purpose fully and essence is open and the brush that aims at designed for automatic motor vehicle washing that illustrates.

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