JPH0471820A - Automatic setting device of frequency of lubrication in mold clamping equipment - Google Patents

Abstract

PURPOSE:To eliminate the measuring operation of cycle time before the start of molding and make it possible to suitably lubricate even when the frequency of lubrication is not correct by a method wherein oiling device is started by the arrival of either the actual number of shots or the interval of time between oilings upon the receipt of signals sent from the counting device of the number of shots and from the measuring device of interval. CONSTITUTION:Upon the receipt of signals of measured time sent from a measuring device 1 of cycle time, automatic setting device 4 of frequency of lubrication roads data out of table of set content of frequency of lubrication, which is stored in memory, so as to set the frequency and amount of oiling, which are set for every kind of injection molder and for every molding cycle. And, upon the receipt of the number of counts sent from the counting device 2 of the number of counts and of the measured value sent from the measuring device 3 of interval, the device 4 sent starting command signal to oiling device 6 so as to carry out oiling, when said number of counts and measured values reach their set values through their comparison with their set values.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic lubrication frequency setting device for a mold clamping device.

(Prior art) Conventionally, a molding material heated and fluidized in a heating cylinder is injected into a mold under high pressure, cooled and solidified or hardened therein, and then the mold is opened to take out the molded product. The injection molding machine has the following structure.

In other words, there is a mold clamping device and an injection bag on the machine stand! Established! The mold clamping device is equipped with a fixed mold mounting body and a movable mold mounting body, and when the mold clamping cylinder reciprocates the movable mold mounting body, the fixed mold and the movable mold are separated. come into contact and separate.

On the other hand, the injection device includes a reciprocating nozzle that heats and melts the resin supplied from the hopper and injects the resin, and the molten resin is injected from the nozzle into the mold recess, that is, the cavity.

Here, WXX direction force is generated in the sliding and rotating parts of the mold clamping device as the mold clamping device slides and rotates. Therefore, lubricants such as oil and grease are regularly supplied to sliding and rotating parts.

In particular, in a mold clamping device with a mold clamping force of 100) or more,
Lack of lubricant will shorten the life of the injection molding machine and cause unexpected accidents, so the lubrication frequency is set according to the cycle time. Then, the lubrication cycle time is measured before the start of molding, and the lubrication frequency is set according to the cycle time.

(Problem to be solved by the invention) However, the above-mentioned conventional molded bag! In this method, the cycle time is measured before the start of molding, and the lubrication frequency is set according to the cycle time.This process is not only troublesome, but also takes a long time before molding can start. It takes time.

Furthermore, if the lubrication frequency is set incorrectly and excessive supply is provided, oil, grease, etc. will be wasted, and conversely, if the lubrication frequency is decreased, the parts such as sliding and rotating parts will become more abrasive.

The present invention solves the problems of the conventional mold clamping device described above, eliminates the need to measure the cycle time before starting molding, and eliminates the need to measure the cycle time when the lubrication frequency set based on the cycle time is incorrect. Another object of the present invention is to provide an automatic lubrication frequency setting device for a mold clamping device that can appropriately lubricate the mold clamping device.

(Means for Solving the Problem) To achieve this, the automatic lubrication frequency setting device for a mold clamping device of the present invention includes a cycle time measuring device that measures the cycle time per shot, and a cycle time measuring device that measures the cycle time per shot, and a cycle time measuring device that measures the number of shots until lubrication. A lubrication frequency is set for each model and molding cycle based on signals from a shot number counting device, an interval measuring device that measures the time until lubrication, and the cycle time measuring device, and a lubrication frequency is set for each model and molding cycle, and the number of shots is counted. It has an automatic lubrication frequency setting device that receives signals from the device and interval measuring device and starts the lubrication device when either the actual number of shots or the interval time until lubrication reaches a set value. There is.

(Function) According to the present invention, as described above, there is provided a cycle time measuring device that measures the cycle time per shot, a shot number counting device that counts the number of shots until refueling, and a time period until refueling. It has an interval measuring device that measures.

The molding cycle time measured by the cycle time measuring device is sent to the lubrication frequency automatic setting device, and the lubrication frequency is set for each model and molding cycle. That is,
number of shots for refueling every predetermined number of shots;
The time for refueling and the amount of refueling for each refueling are set every time a predetermined time elapses.

Then, upon receiving signals from the shot number counting device and the interval measuring device, the refueling device starts when either the actual number of shots or the interval time until refueling reaches a set value. .

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an automatic lubrication frequency setting device for a mold clamping device according to the present invention.

In the figure, 1 is a cycle time measuring device, 17y
Measures the cycle time per trip and sends a signal of the measured time. 2 is a shot number counting device that counts the number of shots until refueling is performed. The count number is set to O upon receiving a signal indicating that refueling is to be performed.

3 is an interval measuring device! , and measures the time until refueling is performed. The measured value is set to 0 upon receiving a signal indicating that refueling is to be performed.

Reference numeral 4 denotes a lubrication frequency automatic setting device, which receives the measurement time signal from the cycle time measuring device 1, reads data from a lubrication frequency setting content table stored in a storage device, and determines the type of injection molding machine, molding Set the lubrication frequency and lubrication amount set for each cycle. Then, the count number from the shot number counting device 2 and the measurement value from the interval measuring device 3 are received, and compared with the above set value, and when the set value is reached, a start command signal is sent to the refueling device 6 to perform refueling.

5 is a molding machine controller, which sends a start command and a status signal to the automatic lubrication frequency setting device 4 to operate the oil supply device 6, and when an abnormality occurs in the oil supply device 6, sends a start command and a status signal to the automatic lubrication frequency setting device 4. The molding machine stops when an abnormal signal is received.

FIG. 2 is a diagram showing the lubrication frequency and lubrication amount set depending on the model and molding cycle.

As shown in the figure, in a mold clamping device of less than 10(l), the lubrication frequency is set regardless of the molding cycle, and the lubrication frequency is set only by the lubrication interval.

100), in the above mold clamping device, different oiling frequencies are set depending on the molding cycle.

FIG. 3 is an operation flowchart of the automatic lubrication frequency setting device for a mold clamping device according to the present invention.

Step ■■ When the lubrication frequency automatic setting device 4 starts,
First, the interval measuring device 3 is started and starts measuring the time until refueling is performed.

Step ■■ When molding is started, the cycle time measuring device 1 measures the cycle time per 1 shore.

Step ■ After that, the lubrication frequency automatic setting device 4
According to the data in the lubrication frequency setting table shown in the figure, the supply frequency and oil supply amount corresponding to the model and molding cycle time are automatically set.

Step ■ Count the number of shots updated each time molding is performed.

Step ■ When the actual number of shots obtained by counting reaches the set number of shots, the set amount of oil is supplied. At this time, when a predetermined period of time has passed and the interval value reaches the value set for each model and molding cycle, the oil supply device 6 is activated, ignoring this even if the actual number of shots does not reach the set number of shots. .

For example, when molding is performed for 20 seconds in one cycle using a 150' mold clamping device, 2.4 cc of lubricating oil will be supplied every 30 shots, according to the settings in the fR sliding frequency setting table. Become. However, since the last refueling,
When refueling is not performed even after 0 minutes have elapsed, that is, when the injection molding machine is stopped, 2.4 cc of refueling is performed, ignoring the number of shots.

Further, when an abnormality occurs in the oil supply device 6, the oil supply device 6 sends an abnormality signal to the molding machine controller 5 via the automatic lubrication frequency setting device 4 to notify the molding machine controller 5 of the abnormality. When the molding machine controller 5 receives this abnormality signal, it activates an alarm device or stops the injection molding machine as appropriate.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As described in detail above, according to the present invention, there is provided a cycle time measuring device that measures the cycle time per soyotat, and a shot number counting device that counts the number of shots until refueling. and an interval measuring device that measures the time until lubrication, and a lubrication frequency that receives signals from the cycle time measuring device and sets the lubrication frequency for each model and molding cycle, and the shot number counting device,
It has an automatic lubrication frequency setting device that receives a signal from the interval measuring device and starts the lubrication device when either the actual number of shots or the interval time until lubrication reaches a set value. .

Therefore, there is no need to measure the cycle time before starting molding, and not only can molding be started immediately, but also the work of setting the lubrication frequency becomes unnecessary.

Also, the lubrication frequency is no longer set incorrectly.
An appropriate amount of lubrication will always be provided.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an automatic lubrication frequency setting device for a mold clamping device of the present invention, Fig. 2 is a diagram showing the lubrication frequency and amount of lubrication set depending on the model and molding cycle, and Fig. 3 is a diagram of the mold clamping device of the present invention. It is an operation flowchart of the lubrication frequency automatic setting device of the device. l... Cycle time measuring device, 2... Shot number counting device, 3... Interval measuring device, 4...
Lubrication frequency automatic setting device, 5...molding machine controller,
6... Refueling device.

Claims (1)

[Claims] (a) A cycle time measuring device that measures the cycle time per shot; (b) A shot number counting device that counts the number of shots until refueling; (c) Until refueling an interval measuring device that measures the time of The mold clamping device is characterized by having an automatic lubrication frequency setting device that starts the lubrication device when either the actual number of shots or the interval time until lubrication reaches a set value. Automatic lubrication frequency setting device.