JPH08309820A - Method and apparatus for calculating die processing size of extrusion molding - Google Patents

Abstract

PURPOSE: To provide a method and an apparatus for calculating the die processing size of extrusion molding capable of estimating the die shape near the object shape without depending upon the worker's experience and skill degree. CONSTITUTION: When molding dimensions, sectional area, the type and extruding conditions of an extruder are input from an input unit 11 as information regarding an extrusion molding to be newly molded, the data similar to the information input from a data memory 10 is extracted by a data extractor 12 based on the input information and predetermined retrieving conditions, and displayed on a display unit 16. Then, when arbitrary data is selected from the displayed extracted data, the die processing dimensions are calculated by a calculator 13 based on the extracted data, and the calculated result is output to an output unit 14. In this case, the ratio of the molding dimension of the extracted data to the die dimension is calculated, and the die processing dimension is calculated by applying to the molding dimension input at the ratio.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die processing dimension calculation method and apparatus for extrusion molding of rubber or plastic.

[0002]

2. Description of the Related Art Conventionally, extruded products are molded into a wide variety of complicated shapes such as a rod shape, a pipe shape or a profile depending on the application. In this case, when a highly elastic material such as rubber passes through a die (base) in the extrusion process, expansion occurs in each part, and the shape of the die and the actually extruded shape often differ significantly. Therefore, when processing the die, a smaller die is first manufactured in consideration of the expansion coefficient, and the die is modified so that the desired extrusion shape can be obtained by actually repeating the extrusion test.

[0003]

As described above, the processing of the die requires an extremely complicated work of actually making an extrusion test and making corrections. In order to reduce the number of extrusion tests and modifications, it is necessary to estimate a shape close to the target shape. However, since the estimation of the die shape depends on the experience and skill of the operator, there is a problem that a high level of skill and sufficient skill are required.

The present invention has been made in view of the above problems, and an object of the present invention is to estimate a die shape close to the target shape without depending on the experience and skill of the operator. It is an object of the present invention to provide an extrusion molding die processing size calculation method and an apparatus therefor.

[0005]

In order to achieve the above-mentioned object, according to the present invention, in claim 1, a plurality of data relating to the molding shape of an extrusion molded product and its die shape are stored in advance, and a new molding is performed. Data that approximates the molding shape of the extrusion molded article to be extracted is extracted from each of the above data, and the die processing dimension of the extrusion molded article to be newly molded is calculated based on the molding shape and die shape of the extracted data. I am trying.

According to a second aspect of the present invention, in the method for calculating the die processing size of extrusion molding according to the first aspect, a processing ratio at an arbitrary point between the molding shape and the die shape of the extracted data is obtained, and this processing ratio is newly calculated. The die processing dimension is calculated by applying it to the corresponding portion of the molding shape of the extrusion molded product to be molded.

According to a third aspect of the present invention, in the method for calculating a die processing dimension of extrusion molding according to the first or second aspect, as the data of the molding shape and the die shape, size data, material data and extrusion condition data are used. I am trying to use it.

According to the present invention, the data storage means stores a plurality of data regarding the molding shape of the extrusion molded product and the die shape thereof, and the data storing means stores data approximate to the extrusion molding product to be newly molded from the data storage means. Data extracting means for extracting, computing means for calculating the die processing dimension of the extrusion molded article to be newly molded based on the molding shape and die shape of the extracted data, and output means for outputting the calculation result of the die processing dimension. Data registration means for registering new data regarding the molding shape of the extruded product and its die shape in the data storage means.

[0009]

According to the first, second and third aspects of the present invention, the data approximate to the extrusion molded article to be newly molded is extracted from the plurality of prestored data relating to the extrusion molded article, and the extracted data Estimate a die shape that is close to the target shape without depending on the experience and skill of the operator, because the die processing dimensions of the extrusion molded product to be newly formed are calculated based on the molding shape and die shape. can do.

According to a fourth aspect of the present invention, data approximating an extrusion molded article to be newly molded is extracted from the data storage means by the data extracting means, and new data is newly created based on the molding shape and die shape of the extracted data. The die processing size of the extrusion molded product to be molded is calculated by the calculation means and the calculation result is output to the output means, so that the shape is close to the target shape without depending on the experience and skill of the operator. The die shape can be estimated. Further, new data regarding the molding shape of the extrusion molded product and the die shape thereof is registered in the data storage means by the data registration means.

[0011]

1 to 4 show an embodiment of the present invention. FIG. 1 is a front sectional view of a die, and FIG. 2 is a schematic configuration diagram of a die processing dimension calculating device.

The die 1 shown in FIG. 1 is used, for example, when a tread portion is extruded in a tire manufacturing process, and an opening through which rubber of a material is extruded has a desired shape (in consideration of expansion coefficient of the material). It is smaller than the molded shape. The description of the structure of the entire extrusion device is omitted here.

The die processing size calculation apparatus of this embodiment comprises a data storage unit 10, an input unit 11, a data extraction unit 12,
The calculation unit 13, the output unit 14, the data registration unit 15, and the data display unit 16 are configured by an electronic computer.

The data storage unit 10 is capable of writing and reading data regarding extrusion-molded products, and stores data regarding a plurality of extrusion-molded products. The contents of the data include data on dimensions (molding dimensions of extruded products, die dimensions showing the die shape, cross-sectional area of extruded products, etc.), data on materials (type of raw rubber, contents of raw material blending, etc.) Data on extrusion conditions (type of extrusion equipment, screw speed, extrusion speed, date of molding, etc.)
Is remembered.

The input unit 11 is for inputting the molding size of an extrusion molded article to be newly molded and information relating to this, and the inputted information is transferred to the data extracting unit 12.

The data extraction unit 12 reads the data from the data storage unit 10, and extracts the data approximate to the input molding dimension from the data storage unit 10 based on a predetermined search condition. ing. Further, the extracted data is displayed on the data display unit 16 constituted by a CRT or the like.

The calculation unit 13 calculates the die processing size of the target extruded product based on the data extracted by the data extraction unit 12. Specifically, calculate the processing ratio of the molding dimensions and die dimensions of the extracted data,
The die processing dimension is calculated by applying this ratio to the input molding dimension. Further, the calculated die processing size is output to the output unit 14 configured by a printer, a CRT or the like.

The data registration unit 15 writes data in the data storage unit 10 and is adapted to register new data regarding an extrusion molded product.

Now, a die processing method using the die processing size calculation device will be described with reference to the flow chart shown in FIG.

That is, as the information on the extrusion-molded product to be newly molded, the molding size, the cross-sectional area, the type of the extrusion device, the extrusion condition, etc. are input from the input unit 11 (S
1) Based on the input information and predetermined search conditions, the data extracting unit 12 extracts data that is similar to the information input from the data storage unit 10 (S2) and is displayed on the data display unit 16. In this case, the ratio of molding dimensions is ±
The search condition is within α, the ratio of the cross-sectional area within ± β, the type of the extrusion device, the coincidence of the extrusion conditions, and the like, and the search conditions are set in advance. Next, when any data is selected from the displayed extracted data (S3), the die processing dimension is calculated by the calculation unit 13 based on the extracted data (S4).

An example of the method for calculating the die processing dimension will be described below with reference to FIG. In addition, here, the shape of the extrusion molded article is symmetrical in the width direction. Moreover, FIG. 4 (a) shows the extracted data, and FIG.
(b) shows the calculation results. The solid line in the figure shows the molding shape of the extrusion molded product, and the alternate long and short dash line in the figure shows the die shape.

That is, as shown in FIG. 4A, at an arbitrary point P of the extracted data, the distance from the center line CL of the molding shape in the X-axis direction is Ax1, the distance from the bottom in the Y-axis direction is Ay1, and the die shape is Ax2 is the distance from the center line CL in the X-axis direction and Ay2 is the distance from the bottom side in the Y-axis direction. As shown in Fig. 4 (b), at the arbitrary point Q of the target extruded product, the center of the forming shape When the distance from the line CL in the X-axis direction is Bx1 and the distance from the bottom in the Y-axis direction is By1, the distance Bx2 in the X-axis direction from the center line CL of the die processing shape and the distance By2 in the Y-axis direction from the bottom are expressed by the following formulas. Calculated by Bx2 = (Ax2 / Ax1) × Bx1 By2 = (Ay2 / Ay1) × By1 Therefore, the die processing dimension is calculated by performing the same calculation for the other plural points along the outer shape of the extrusion-molded product. The result is output to the output unit 14.

After that, the die is processed based on the dimension of the calculated result, and the shape of the die is modified so as to obtain the target extruded shape by actually repeating the extrusion test (S5, S).
6, S7). When the die having the desired extrusion shape is completed, the molding dimension and die dimension and other data relating to the extrusion molded article are input to the data registration section 15 and registered in the data storage section 10 as new data (S8). ).

As described above, according to this embodiment, data concerning a plurality of extrusion-molded products and die processing dimensions thereof are stored in advance, and the molding dimensions of the extrusion-molded product to be newly molded are stored in the data. Since the approximated data is extracted and the die processing dimension of the extrusion molded product to be newly molded is calculated based on the extracted data, it does not depend on the experience and skill of the operator, and the objective It is possible to estimate the shape of the die that is close to the shape. Therefore, the number of extrusion tests and die modifications can be significantly reduced,
Productivity can be improved.

[0025]

As described above, according to the first, second and third aspects of the present invention, it is possible to always estimate the shape of the die close to the target shape without depending on the experience and skill of the operator. As a result, the number of extrusion tests and die modifications can be significantly reduced, and productivity can be improved.

Further, according to the fourth aspect, it is possible to realize the device which can obtain the same effects as those of the first, second and third aspects, which is advantageous for practical use.

[Brief description of drawings]

FIG. 1 is a front sectional view of a die showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a die processing dimension calculation device.

FIG. 3 is a flowchart showing a die processing method using the die processing size calculation device.

FIG. 4 is a view showing a molding shape and a die shape.

[Explanation of symbols]

1 ... Die, 10 ... Data storage unit, 11 ... Input unit, 12 ...
Data extraction unit, 13 ... Calculation unit, 14 ... Output unit, 15 ... Data registration unit, 16 ... Data display unit.

Claims (4)

[Claims] 1. A plurality of data relating to the molding shape of an extrusion molded product and its die shape are stored in advance, and data approximate to the molding shape of an extrusion molded product to be newly molded is selected from the above-mentioned data. A method for calculating a die processing dimension of extrusion molding, which comprises extracting and calculating a die processing dimension of an extrusion molded article to be newly molded based on the molding shape and die shape of the extracted data. 2. A processing ratio at an arbitrary point between the molding shape and the die shape of the extracted data is obtained, and this processing ratio is applied to a corresponding portion of the molding shape of an extrusion molded article to be newly molded, and the die is applied. The method for calculating a die processing dimension for extrusion molding according to claim 1, wherein the processing dimension is calculated. 3. The data on the molding shape and the die shape, data on dimensions, data on materials and data on extrusion conditions are used.
Alternatively, the method for calculating a die processing dimension of extrusion molding according to 2. 4. A data storage means for storing a plurality of data relating to a molding shape of an extrusion-molded product and its die shape, and a data extracting means for extracting data approximate to an extrusion-molded product to be newly molded from the data storage means. A calculation means for calculating the die processing dimension of the extrusion molded product to be newly molded based on the molding shape and die shape of the extracted data; an output means for outputting the calculation result of the die processing dimension; A die processing dimension calculation device for extrusion molding, comprising: data registration means for registering new data relating to a molding shape and its die shape in a data storage means.