JPH04212825A - Method and device for processing data of injection molding machine - Google Patents

Abstract

PURPOSE:To determine the state of filling, etc., of a resin material injected and filled into a mold intuitively by arithmetically operating the volume velocity of the resin material from a screw velocity data and a screw diametral data and processing data on the basis of a volume velocity data. CONSTITUTION:The volume velocity data Ds of a resin material is arithmetically operated by an arithmetic section 4 from a screw velocity data Dv and a screw diametral data Dd. Data related to a molding process are processed by a processing section 5 on the basis of the volume velocity data Ds. Accordingly, the filling material, etc., of a resin material injected and filled into a mold are determined intuitively, and the state of molding is easily decided rapidly and accurately while analysis, etc., are facilitated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing method and apparatus for an injection molding machine for processing data related to a molding process.

0002

2. Description of the Related Art Conventionally, in setting molding conditions and monitoring molding operations in an injection molding machine, screw speed data, filling pressure data, etc. have been used to perform various data processing such as setting, storing, displaying, etc.

For example, the molding conditions in the injection process are set by a plurality of screw speeds and shift points (positions) from the injection start position after metering. By setting the screw speed in multiple stages like this, the resin material flows in the order of sprue, runner, gate, and cavity in the mold during injection filling.
The optimum screw speed and shift point corresponding to this flow path are set. On the other hand, even in the actual injection process, these screw speeds and shift points are detected, and the detected data is displayed in a graph on a display or the like and used as monitoring data.

0004

[Problems to be Solved by the Invention] However, in conventional data processing, the molding conditions of the injection process are set by the screw speed, so it takes experience to understand the filling state of the resin material injected into the mold. It is difficult to understand easily, quickly, and accurately because it requires intuition, and it is also difficult to perform analysis.

[0005] The present invention solves the problems that exist in the prior art, and allows the filling state of the resin material in the mold to be easily, quickly and accurately grasped, and also allows data on the injection molding machine to be easily analyzed. The purpose is to provide a processing method and apparatus.

[0006]

[Means for Solving the Problems] A data processing method for an injection molding machine according to the present invention calculates the volume velocity of a resin material from screw speed data Dv and screw diameter data Dd when processing data related to a molding process. , data processing is performed based on the volume velocity data Ds.

[0007] Furthermore, the data processing device 1 for an injection molding machine according to the present invention is used to implement the data processing method.
An input section 2 for the screw speed data Dv, an input section 3 for the screw diameter data Dd, a calculation section 4 for calculating the volume velocity of the resin material from the screw speed data Dv and the screw diameter data Dd, and a calculation section 4 for calculating the volume velocity of the resin material based on the volume velocity data Ds. It is characterized by comprising a processing section 5 that processes data related to the molding process.

[0008]

[Operation] According to the data processing method (or data processing device 1) for an injection molding machine according to the present invention, screw speed data Dv At the same time, screw diameter data Dd is also provided from the input unit 3 such as an input device or a storage device. Thereby, the calculation unit 4 calculates the volume velocity of the resin material from the screw speed data Dv and the screw diameter data Dd. That is, the screw cross-sectional area is calculated from the screw diameter data Dd, and the volume velocity (volume movement per unit time, unit: cm3/s) of the resin material is further calculated from the screw cross-sectional area and the screw speed data Dv. Then, the processing section 5 performs data processing such as setting, storing, displaying, and recording based on the obtained volumetric velocity data Ds.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

First, the configuration of a data processing apparatus 1 according to the present invention will be explained with reference to FIG.

M is an injection molding machine, which constitutes a general in-line screw type injection molding machine including a screw 12 inserted into a heating cylinder 11.

On the other hand, 13 is a position sensor (detection device) for detecting the position of the screw 12, and a position detection signal from the position sensor 13 is connected to a central controller 14 having a computer function. The central controller 14 includes a speed calculation function section 15 (input section 2), a volume velocity calculation function section 16 (calculation section 4), a resin amount calculation function section 17, a product weight calculation function section 18, a judgment function section 19, and a reference value setting. 20 and the like. Further, an input device 21 (input section 3), a display section 22, and a printer 23 are connected to the central controller 14, respectively. Note that each functional unit that performs judgment, conversion, display, recording, etc. on the volume velocity data Ds output from the volume velocity calculation function unit 16 constitutes the processing unit 5.

Next, a data processing method according to the present invention will be explained with reference to FIG.

First, the speed calculation function section 15 is connected to the position sensor 1.
The screw speed is calculated based on the position detection signal given from 3. Then, the obtained screw speed data D
v is given to the volume velocity calculation function section 16. On the other hand, screw diameter data Dd is input from the input device 21,
This screw diameter data Dd is provided to the volume velocity calculation function section 16. The volume velocity calculation function section 16 calculates the volume velocity based on the screw velocity data Dv and the screw diameter data Dd. Volume velocity is 1 screw per unit time.
This is the volume of the resin material transferred by the movement of 2, and the unit is [cm3/s]. The obtained volumetric velocity data Ds is then given to the resin amount calculation function section 17 to calculate the measured resin amount and the injection resin amount, and the product weight calculation function section 18 calculates the product weight. in this case,
Product weight can be easily calculated based on resin properties (temperature, density, resin pressure).

The various data thus obtained are processed by the processing section 5. That is, the volume velocity data Ds, the screw velocity data Dv, the data regarding the measured resin amount and the injection resin amount, and the data regarding the product weight are displayed on the display section 22, and can be printed out using the printer 23. On the other hand, the volume velocity data Ds
Each data including the above is given to the determination function section 19, which determines whether the data is normal data or abnormal data by comparison with the reference value given from the reference value setting section 20, and outputs the determination result.

By the way, data processing based on the volumetric velocity data Ds is particularly suitable for use in the injection molding machine 20 for molding laminated sandwich molded products, multicolor molded products, etc. shown in FIG. The injection molding machine 20 includes a plurality of injection devices 21,
Molding is performed by injecting and filling different resin materials into a single mold cavity 25 from 22 and 23. When molding a sandwich molded product, etc., the filling conditions of the resin material injected first greatly affect the subsequent injection filling conditions, so in order to achieve stable molding, the resin material on the skin side and core side must be In addition to properly balancing the rheological properties of each resin material, it is necessary to precisely control the molding conditions that affect the flow state of each resin material. For this reason, for example, if the molding conditions of an arbitrary injection device that performs injection filling first are changed, the molding conditions of other injection devices that perform subsequent injection filling must also be changed.

In this case, by using the volume velocity data Ds, the horizontal axis represents time, and the vertical axis represents the individual injection devices 21.
By displaying the volume velocity at ... and a characteristic diagram representing the sum of the volume velocity, the overall filling state can be easily, quickly and accurately grasped.

In addition, in FIG. 2, 31, 32, 33
is a control device, 34... is an amplifier connected to various sensors, 3
5 is a sequence control device, 36 is a processing device, 37 is a display device, and 38 is an input device.

The embodiments have been described in detail above, but
The invention is not limited to such embodiments. For example, although a case has been described in which the molding operation in the injection process is monitored, it may also be a case where molding conditions are set. In this case, the screw speed data input section becomes an input device. Further, the volume velocity data may be used in other molding processes such as a metering process. Furthermore, although an input device has been illustrated as an input unit for screw diameter data, and a case where input is made from this input device has been illustrated, data stored in a storage device in advance may be read out. In this case, the information may be stored in the storage device by inputting it from an input device, or by reading and storing an identification code engraved on the screw when the power is turned on. Moreover, the volume velocity is a concept that also includes the weight velocity converted by specific gravity. In addition, the detailed structure, method, etc. may be arbitrarily changed without departing from the gist of the present invention.

[0020]

Effects of the Invention As described above, the data processing method (data processing device) for an injection molding machine according to the present invention calculates the volume velocity of the resin material from the screw speed data and the screw diameter data, and calculates the volume velocity of the resin material based on the volume velocity data. As a result, it is easy to intuitively grasp the filling state of the resin material injected into the mold, and the molding state can be easily, quickly and accurately grasped, and analysis can be easily performed. It has the remarkable effect of being able to.

[0021]

[Brief explanation of the drawing]

[Fig. 1] Functional block diagram of a data processing device according to the present invention,

FIG. 2 is a schematic configuration diagram of an injection molding machine suitable for using the data processing method according to the present invention.

[Explanation of symbols]

1: Data processing device, 2, 3: Input section, 4: Arithmetic section, 5
: processing section, Dv: screw speed data, Dd: screw diameter data, Ds: volumetric speed data,

Claims (2)

[Claims] [Claim 1] When processing data related to the molding process of an injection molding machine, the volume velocity of the resin material is calculated from screw speed data and screw diameter data, and the data is processed based on the volume velocity data. Data processing method for injection molding machines. 2. An input section for screw speed data, an input section for screw diameter data, a calculation section for calculating the volume velocity of the resin material from the screw speed data and the screw diameter data, and a calculation section for calculating the volume velocity of the resin material based on the volume velocity data. A data processing device for an injection molding machine, comprising a processing section that processes related data.