JPH06190533A - Method for maintaining die-clamp forming machine - Google Patents

Abstract

PURPOSE:To enable the quantitative discrimination of wearing condition to be carried out without decomposing a die-clamp forming machine. CONSTITUTION:A testing die 10 is fitted between a stationary die plate 3 and a moving die plate 6 and pressed by a prescribed min. die clamping force and the adjustment of the die thickness is executed so that the die clamping force to plural tie bars 5 uniformly distributes. Successively, the testing die 10 is pressed by a prescribed max. die clamping force, and after again adjusting the die thickness so that the die clamping force to plural tie bars 5 uniformly distributes, progressing quantity of a link housing 4 at the initial time is measured. After passing a prescribed time by the operation, the testing die 10 is fitted between the stationary die plate 3 and the moving die plate 6 to execute the adjustment. Then the progressing quantity of the link housing 4 at this time is measured and compared with the progressing quantity at the initial time to discriminate the wearing condition of the die clamp forming machine 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance method capable of quantitatively determining a wear state of a mold clamping machine.

[0002]

2. Description of the Related Art Conventionally, for the maintenance of a mold clamping molding machine, the mold clamping molding machine is disassembled at the time of inspection and the worn state is visually judged.

[0003]

However, in the above maintenance, there is a problem that it takes time and labor for disassembling the mold clamping molding machine, the criteria for judgment is difficult because of visual inspection, and in addition, it is inefficient.

In view of this, the present invention has been made for the purpose of providing a maintenance method for a mold clamping molding machine, which enables a wear state to be determined quantitatively without disassembling the mold clamping molding machine. is there.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention mounts a test die between a fixed die plate and a movable die plate, and uses the test die with a predetermined minimum clamping force. Press the die to adjust the die thickness so that the mold clamping force is evenly distributed to the multiple tie bars, and then press the test mold with a predetermined maximum mold clamping force to the multiple tie bars. After adjusting the die thickness again so that the mold clamping force is evenly distributed, measure the initial amount of insertion of the link housing, and after a predetermined period of time, place the test die between the fixed die plate and the movable die plate. It mounts and carries out the same adjustment as the above, measures the amount of pushing-in of this time of a link housing, compares it with the amount of initial pushing, and judges the wear state of a mold clamping molding machine, It is set as Claim 1 and said measuring method. In the predetermined minimum Measure and record the position of the link housing with respect to the frame when the test mold is pressed by the clamping force, and compare the initial value with the current value after the operation for a predetermined period and using the same measurement method. Claim 2 is to determine the wear state.

[0006]

The test die is mounted between the fixed die plate and the movable die plate, and the fixed die plate side and the movable die plate side of the test die are pressed with a predetermined minimum mold clamping force.
Then, the die thickness is adjusted so that the mold clamping force is evenly distributed to the plurality of tie bars, and then the fixed mold plate side and the movable mold plate side of the test mold are subjected to a predetermined maximum mold clamping force. By pressing, the die thickness is readjusted so that the mold clamping force is evenly distributed to the plurality of tie bars, and the initial pushing amount of the link housing is measured. Then, after a lapse of a predetermined period, the test die is mounted again between the fixed die plate and the movable die plate, and the fixed die plate side of the test die is given a predetermined minimum clamping force and a predetermined maximum clamping force. And the moving tie plate side are pressed to adjust the die thickness and measure the amount of insertion of the link housing this time. And
The wear state of the mold clamping molding machine is quantitatively determined by comparing the initially driven amount and the current driven amount.

In the above measuring method, the initial value of the position of the link housing with respect to the frame at the predetermined minimum mold clamping force is compared with the current value obtained by the same measuring method after the operation for a predetermined period of time, and the mold clamping machine wears. The state is quantitatively determined.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for maintaining a mold clamping machine according to the present invention will be described below with reference to FIG.
~ It demonstrates with reference to FIG. FIG. 1 is an overall schematic view of the mold clamping molding machine 1. A fixed die plate 3 and a link housing 4 are erected on the upper surface of a frame 2, and the fixed die plate 3 and the link housing 4 are plural (this embodiment Then 4
Books) tied with tie bars 5. The fixed die plate 3 and the link housing 4 of these tie bars 5 are
The movable die plate 6 is inserted between the and. A mold clamping cylinder 7 is mounted on the link housing 4, and a toggle device 9 is provided between the rod 8 of the mold clamping cylinder 7 and the link housing 4 and the movable die plate 6.
Is provided, the pressing force of the mold clamping cylinder 7 is increased and transmitted to the movable die plate 6, and the fixed die plate 3 side of the test die 10 mounted between the fixed die plate 3 and the movable die plate 6. The movable die plate 6 side is pressed. In addition, the frame 2 is provided with a linear scale 11, and the amount of pushing in the link housing 4 (that is, the test mold 10 with a predetermined minimum mold clamping force).
Let L ₀ be the reading of the linear scale 11 when pressing, and let L _{100 be} the reading of the linear scale 11 when pressing the mold 10 with a predetermined minimum mold clamping force.
The amount of drive-in δ is δ = L ₁₀₀ −L ₀ . ) Is to be measured.

Here, a tensile load is negatively applied to the tie bar 5 with a spring constant K ₅ , and the fixed die plate 3, the link housing 4, the moving die plate 6, the toggle device 9 and the test die 10 have spring constants K ₃ and K, respectively. ₄ , K ₆ , K ₉ and K
_A compressive load is applied at ₁₀ , and the tensile load and the compressive load are balanced as shown in FIG. The spring constant K 10 of the test mold ₁₀ is a known constant value, and all the other spring constants are values unique to the mold clamping molding machine 1, so that the spring constant is constant unless the mold clamping molding machine 1 is damaged. The value of does not change.

The maintenance of the mold clamping molding machine 1 is performed as follows. First, the test die 10 is mounted between the fixed die plate 3 and the movable die plate 6.
Then, the mold clamping cylinder 7 is moved to a predetermined minimum mold clamping force (for example,
The fixed die plate 3 of the test die 10 is operated through the toggle device 9 by operating at a maximum die clamping force of 0.1 to 0.3% or less).
Side and the moving die plate 6 side are pressed, and the die thickness (L _D ) of the test die 10 is adjusted so that the mold clamping force is evenly distributed to the four tie bars 5. Then, the mold clamping cylinder 7 is operated with a predetermined maximum mold clamping force (100%) so that the mold clamping force is evenly distributed to the four tie bars 5.
Readjust the die thickness (L _D ) of. Then, the linear scale 11 measures the initial drive-in amount (δ) of the link housing 4. After that, after a lapse of a predetermined period (for example, one year), the same test mold 10 as the original is fixed to the fixed die plate 3
And the movable die plate 6 are mounted, and the same adjustment as described above is performed to measure the current drive amount (δ ′) of the link housing 4. Then, the wear state of the mold clamping molding machine 1 can be determined by comparing it with the relationship between the predetermined mold clamping force and the amount of pushing due to the wear of the mold clamping molding machine 1.

For example, if a crack is generated in the tie bar 5, the spring constant K _{5 of the} tie bar 5 becomes small, and the amount of pushing (δ ') for this time is predetermined before the mold clamping force is 100%. The occurrence of cracks can be found because the tightening force is greater than the relationship between the pushing amount. In addition,
Similarly, fixed die plate 3 and link housing 4
And damage to the moving die plate 6 can be found.

Further, in the above measuring method, the initial value of the absolute position of the position of the link housing 4 with respect to the frame 2 at a predetermined minimum mold clamping force is compared with the present value by the same measuring method after the operation for a predetermined period of time. Then, the wear state of each part can be determined.

For example, the wear of the link pin and the link pin bush of the toggle device 9, the wear of the sliding contact portion between the screw of the tie bar 5 and the tie bar nut 14, the wear of the die mounting surface of the fixed die plate 3 and the working die plate 6, etc. There is a worn part.

Incidentally, in measuring the mold clamping force on the tie bar 5,
As shown in FIG. 3, a load meter 13 may be mounted on the test die 10 for adjustment, or a load meter (not shown) may be mounted on each tie bar 5 to adjust the tie bar nuts 14, 14 ,. You may. Further, a rotary encoder may be provided on the tie bar nuts 14, 14, ... Instead of the linear scale 11 for measuring the amount of drive, and the measurement is not limited to these.

[0015]

As described above, in the maintenance method for the mold clamping molding machine according to the present invention, the test mold is mounted between the fixed die plate and the movable die plate, and the test mold is applied with a predetermined mold clamping force. Adjust the die thickness so that the mold clamping force is evenly distributed to the multiple tie bars by pressing, measure the initial amount of insertion of the link housing, and after a certain period of time, fix the test mold to the fixed die. It was installed between the plate and the movable die plate and the same adjustment as above was made.The amount of insertion of the link housing this time was measured and compared with the initial amount of insertion to determine the wear state of the mold clamping molding machine. The wear state can be determined without disassembling the mold clamping molding machine, and work efficiency is greatly improved. Moreover, the wear state can be quantitatively determined by a simple method to prevent accidents due to machine breakage, and preventive maintenance can be properly performed. Further, there is an excellent effect that the wear state of each part can be determined.

[Brief description of drawings]

FIG. 1 is a schematic side view of a mold clamping machine using the maintenance method of the present invention.

FIG. 2 is an equivalent diagram of a spring constant of the mold clamping molding machine.

FIG. 3 is a perspective view in which a load meter is attached to a test mold.

[Explanation of symbols]

 1 Clamping molding machine 3 Fixed die plate 4 Link housing 5 Tie bar 6 Moving die plate 7 Clamping cylinder 9 Toggle device 10 Test mold 11 Linear case

Claims (2)

[Claims] 1. A test die is mounted between a fixed die plate and a movable die plate, and the test die is pressed with a predetermined minimum die clamping force so that the die clamping force is uniform with respect to a plurality of tie bars. Adjust the die thickness so that it is distributed, and then press the test die with a predetermined maximum mold clamping force to readjust the die thickness so that the mold clamping force is evenly distributed to multiple tie bars. After that, measure the initial amount of insertion of the link housing, and after the lapse of a predetermined period of operation, mount the test mold between the fixed die plate and the moving die plate and make the same adjustment as above, and insert the link housing this time. A maintenance method for a mold clamping molding machine, which comprises measuring the amount and comparing it with an initially driven amount to determine a wear state of the mold clamping molding machine. 2. A test die is mounted between a fixed die plate and a movable die plate, and the test die is pressed with a predetermined minimum die clamping force so that the die clamping force is uniform with respect to a plurality of divers. Adjust the die thickness so that it is distributed, measure and record the position of the link housing with respect to the frame, and compare the initial value with the current value obtained by the same measurement method after the operation for a predetermined period of time. A method for maintaining a mold clamping molding machine, characterized by determining a wear state.