JPS59131408A - Method of cutting light aerated concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting method for obtaining a five-surface smooth lightweight cellular concrete product.

Conventionally, lightweight cellular cosiclete in a semi-plastic state is cut, and in order to obtain a product with a smooth surface, a single reciprocating wire is used to cut the corrugated pitch at a pitch of 5 to 20 meters, resembling the grain of natural wood. A method has been proposed to add .

However, with these conventional methods using a single wire, products with a smooth surface can only be obtained within the range where the wood grain pattern is formed, and it is difficult to obtain products with a smooth surface with a corrugation pitch of 2 (1 m or more). Therefore, this product was limited to those with wood grain patterns.

The inventor of the present invention discovered the present invention as a result of extensive research in an effort to obtain a truly smooth product free of the proverbial wood grain pattern with a waveform pitch of 5 to 20%.

In the present invention, the reciprocating wire has at least two
I need this book. As mentioned above, with wire, even if other conditions are limited, the desired product cannot be obtained. Oka 1 In the present invention, cutting using at least two wires is not limited to actually using two or more wires 1 For example, as shown in FIG. In short, the lightweight cellular concrete in a semi-plastic state only needs to be contacted twice with the wire.

In the device shown in Fig. 1, a single wire (1) 5, for example, a piano wire, is fixed at both ends to a swinging drum (2) and bent at the center along a freely rotating roller (3). , using this to obtain semi-plastic ii% ++ air bubbles (4), e.g. AL before autoclave curing.
C (autoclave-cured lightweight cellular concrete) is cut by, for example, swinging a swinging drum (2) to give reciprocating motion to the wire (1).

Even when using such a device, the relative cutting speed of the wire (νm/min) between the wire and lightweight aerated concrete is
7-30? yt/min.

Not only will the processing capacity be inferior if the running speed is slow.

The smoothness of the cutting surface deteriorates. 30 again? If the speed is increased beyond n/min, it becomes difficult to implement the device.

From this point of view, a particularly suitable running speed is 10 to 20 m/min.

Furthermore, the frequency (f cycles/min) of the wire and the pitch of the waveform (P fin) are 25 to 100 I! It is important that I11 be within the following range y so that it is particularly preferably 27 to 100 m.

100≧100×10”≧25° These areas are the areas A and A′ in Figure 2. In the conventional method of cutting a single wire while reciprocating (oscillating) it, The disclosed region is region B in Fig. 2, and in the range of 20≧P≧5, if τ is increased, the value of f has to be increased (region C), that is, 1
In conventional methods that attempt to obtain smooth products using solid wire, regions A and A' are difficult to use for various reasons.

In the present invention, when two or more wires are used, the running speed of the wire is reduced at frequencies falling in region B, which is the optimum region when one wire is used. It is preferable that the improvement area C is obtained when one wire is used.
It is preferable that the number of oscillations of the wire is low compared to the above.

Note that the stroke length of the wire used in the present invention, that is, the amplitude length of the wire is 20 to 250+u+, particularly preferably,
It is preferable to set it as ioo~170 m. If it is too small or too large, the wire swinging effect will not be obtained.

As detailed above, the present invention is capable of cutting lightweight aerated concrete in a semi-plastic state using at least two wires that reciprocate in the wire direction (vertical direction) (see the example in FIG. 1). It is essential, and the running speed (vm/min) of the wire is 7 to 30 m/min, and the vibration frequency of the wire is the waveform pitch (P WJ = 21 × 103),
25-100 ms, particularly preferably 27-1.00+
It is also an essential cutting method to set the range to be u+.

In this way, in the present invention, the range between f and
As seen in the figure, the reason why this is different from the conventional single wire is unknown, but surprisingly the range is different when two wires are used. The product obtained according to the present invention does not have a grain-like pattern with a pitch of 5 to 20+IIa as in the past, and therefore has an apparently very smooth surface.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing an embodiment of the present invention, and FIG. 2 is a diagram showing the running speed of the wire and the range of vibration frequency. In the drawings, 1 is wire and 4 is semi-plastic lightweight cellular concrete. Patent applicant Asahi Kasei Industries, Ltd.

Claims (1)

[Claims] Lightweight aerated concrete in a semi-plastic state. When cutting using at least two wires reciprocating in the longitudinal direction, the running speed (tI) of the wires is f near to 30 m/min, and the frequency (f, cycle 7 minutes) of the wires is set to the pitch of the waveform. (P mw =1=X10”) is
A method for cutting lightweight aerated concrete characterized by a range of 25 to 100 pieces.