JPH0361837A - Apparatus for measuring adhesion of rubber material - Google Patents

Abstract

PURPOSE:To measure the adhesion of unvulcanized rubber material without destruction by mounting a flat measuring part which is mounted on the surface of the unvulcanized rubber at the lower end of a slant part having a recessed slant surface parth on which a metal ball or a metal roll falls, communicating the recessed surface path to the measuring part, and providing a through-hole which is linked to the surface of the rubber material. CONSTITUTION:A metal ball 3 is subjected to a natural fall from the top of a slant part 1. The falling of the ball 3 is performed by imparting and releasing the magnetic force of, e.g. an electromagnet 10. The falling is carried out along a slant recessed path 4. The ball 3 after the fall passes a flat measuring part 2 and reaches a through- hole 6. The ball is in contact with the surface of an unvulcanized rubber material 5. The ball is rotated and moved in the longitudinal direction. In this constitution, the moving distance of the ball 3 is different in correspondence with the adhesion of the material 5. The distance of the through-hole 6 from the movement starting point (a) to a movement end point (b) is read with a graduation 7. Thus the adhesion can be decided based on the value. In this way, the on-line measurement can be performed without destruction and without cutting out the rubber material, and it is not necessary to restrict the measuring places.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for measuring the tackiness of an unvulcanized rubber material that is convenient to carry and capable of non-destructively on-line measuring the tackiness of an unvulcanized rubber material.

[Conventional technology]

Conventionally, in order to improve the processability of rubber materials such as unvulcanized rubber sheets and unvulcanized calendar materials, it has been carried out to determine the tack level of such rubber materials. For example, as described in Japanese Patent Application Laid-Open No. 57-63435, an apparatus used in this case is such that an upper sample wrapped around a metal disk is pressed onto a lower sample, and then the upper sample is pulled up at a constant speed. There is something called Pikmatatsuta that evaluates the resistance force when a sample separates from the lower sample as adhesive force.

However, such equipment cannot be used online on a production line because it requires cutting out a sample and measuring the adhesive strength of the rubber material in the laboratory, and it is also difficult to use it for sampling and inspection work. Not only does it require manpower, but there are also problems with data variations due to discontinuous measurements, and it is difficult to carry.

[Problem to be solved by the invention]

The present invention provides a device for measuring the adhesive force of a rubber material that can non-destructively measure the adhesive force of an unvulcanized rubber material, is portable, and thereby enables on-line measurement on a production line. With the goal.

[Means to solve the problem]

The device for measuring the adhesion force of a rubber material of the present invention connects a flat measuring part placed on the surface of an unvulcanized rubber material to the lower end of an inclined part forming an inclined circuit on which a metal ball or a metal roll falls, The flat measurement portion is characterized in that a through groove is provided in the flat measurement portion, communicating with the slope circuit and facing the surface of the unvulcanized rubber material.

This means will be explained in detail below with reference to the drawings.

In FIGS. 1 and 2, T is a device for measuring the adhesive force of rubber materials, and this adhesive force measuring device! T consists of an inclined part l and a flat measuring part 2 connected to the lower end thereof. Inclined part 1
As shown in FIGS. 1 and 3, a slope circuit 4 is formed which serves as a path for the metal ball 3 to fall.

The width of the slope circuit 4 may be slightly larger than the diameter of the metal ball 3. As the material of the metal ball 3, preferably steel material described in JIS K 4805 is used. Instead of the metal ball 3, a metal roll 3° having a guide rod 3a' provided at the center of rotation as shown in FIG. 4 can be used.

The flat measuring section 2 is placed on the surface of a sheet-like unvulcanized rubber material 5 placed on the production line. As shown in FIGS. 2 and 5, a metal ball 3 or a metal roll 3'' that has fallen from the inclined portion 1 is placed in the flat measurement portion 2 in contact with the surface of the unvulcanized rubber material 5. A through groove 6 is provided for movement in the longitudinal direction. This through groove 6 communicates with the slope circuit 4. Also,
A metal ball 3 or a metal roll 3° is placed on the side of the through groove 6.
A scale 7 is engraved to measure the moving distance.

The slope circuit 4 at the connection part 8 between the slope part 1 and the flat measurement part 2 in the adhesive force measuring device T is curved in an arc shape as shown in FIG. It is formed so as to be in contact with the rubber material 5 (the side in contact with the rubber material 5). This is to ensure that the metal ball 3 or the metal roll 3'' falls smoothly.The materials of the inclined portion 1 and the flat measurement portion 2 are preferably metal such as iron or plastic, respectively. .

Note that the height and angle of inclination of the inclined portion 1 can be adjusted as necessary. The adhesive force measuring device T is usually preferably approximately 200 Il in total height and 80 c in total length, and more specifically, the length of the inclined portion 1 is 30 to 40 cI,
It is preferable that the length of the flat measuring section 2 is 50 to 40 c-.

To measure the adhesive force of a rubber material using the adhesive force measuring device T configured in this way, first, as shown in FIG. . The dropping method is carried out with the stopper removed, but preferably the metal ball 3 is supported by the magnetic force of the electromagnet 7 10, and then the magnetic force is released and the metal ball 3 is allowed to fall through the slope circuit 4. The metal ball 3 after falling reaches the flat measurement part 2, enters the through groove 6, contacts the surface of the unvulcanized rubber material 5, and moves in the longitudinal direction while rotating. In this case, the moving distance of the metal ball 3 varies depending on the adhesive strength of the unvulcanized rubber material 5.

Therefore, the distance from the movement start point a to the movement end point in the through groove 6 is read on the scale 7, and the adhesive force is determined from that value.

〔Effect of the invention〕

As explained above, in the rubber material adhesive strength measuring device of the present invention, a flat measuring section is connected to the lower end of an inclined section forming an inclined circuit, a through groove is provided in the flat measuring section, and the device is dropped from the inclined section. The distance traveled by the metal ball or metal roll when it comes into contact with the surface of the unvulcanized rubber material at the bottom of this through groove and moves in the longitudinal direction is measured. It can be placed on the material and measured. Therefore, non-destructive measurement can be easily performed without cutting out the rubber material, making online measurement possible. In addition, since the surface of the rubber material can be moved arbitrarily for measurement and the measurement location is not limited, it is possible to improve the accuracy of the measurement data, and it is also possible to quickly respond on-site in the event of an abnormality in the adhesive 4° force of the rubber material. can be done. Furthermore, it can be packed compactly, making it convenient to carry.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view of an example of the device for measuring the adhesive strength of rubber materials of the present invention, FIG. 2 is an explanatory plan view thereof, and FIGS. 3 and 4 are respectively the m- FIG. 5 is an explanatory view of the V-V line cross section of the flat measurement section in FIG. 1. DESCRIPTION OF SYMBOLS 1... Inclined part, 2... Flat measuring part, 3... Metal ball, 3°... Metal roll, 4... Circuit, 5...
Rubber material, 6... Penetration groove, 7... Scale, 8... Connection portion, 10... Electromagnetic magnet, T... Adhesive force measuring device.

Claims (1)

[Claims] A flat measurement section placed on the surface of the unvulcanized rubber material is connected to the lower end of the slope part forming the slope circuit on which the metal ball or metal roll falls, and the flat measurement section is communicated with the slope circuit. An apparatus for measuring adhesive force of a rubber material, which is provided with a through groove facing the surface of the unvulcanized rubber material.