JPH0137805Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a device for detecting the degree of closeness between opposing mating surfaces of vertical frameless molds when the two molds are brought together.

(Prior Art) In the above-mentioned vertical frameless mold, since the mating surfaces are vertical, the joint strength of the mold mating surfaces during mold matching is weaker than that of a horizontally split mold. For this reason, there are cases in which the succeeding mold is attached to the core set in the mold section of the preceding mold, leaving a gap between the mating surfaces of the two. Also, if the mold has warpage, with a horizontally split mold the mold will deform due to gravity and the adhesion of the mating surfaces will be maintained, but with a vertically split mold this effect cannot be expected and this may cause poor mold matching. . If metal is poured into such a poorly matched mold, casting may occur in the cast product or dimensional accuracy may decrease, making it impossible to obtain a sound product. Also, when pouring metal, leakage occurs from the gap between the mold mating surfaces, which is dangerous to work with.

(Purpose of the invention) The present invention was made in view of the above-mentioned circumstances, and is intended to improve the degree of adhesion between the opposing mating surfaces of the preceding mold and the succeeding mold when the molds are matched in a vertical frameless mold. The purpose is to detect this and avoid pouring into molds with poor mold matching.

(Structure of the invention) Hereinafter, the invention will be described in detail based on examples. In Figs. The figure shows a vertical frameless mold (hereinafter simply referred to as a mold) in which mold parts 6 and 7 are formed on the front and rear mating surfaces 4 and 5 of the mold 1, respectively. A pouring cavity 8 is defined by the opposing mold parts 7 and 6 of the adjacent mold 1. Note that 9 is the core.

Recesses 10 and 11 are formed at each of the four corners of both mating surfaces 4 and 5 in the mold 1, and the recess 10 at the rear of the preceding mold 1 and the recess 10 at the rear of the succeeding mold 1 are formed.
Together with the recess 11 in the front part of the sensor clamping pressure space 12 is defined. Reference numeral 13 denotes a mold mating surface adhesion detection device according to the present invention, and its configuration will be explained below.On both sides of the mold mating position in the conveyance path 3, there are two upper and lower rails along the conveyance path 3, respectively. 14, 14 is the frame 15,
A trolley 16 is placed on each rail 14 via rollers 17 so as to be movable. A cylinder 18 is disposed on the truck 16 and is perpendicular to the conveyance path 3, and its piston rod 1
9 is placed toward the conveyance path 3 side. A guide rod 21 is disposed above the cylinder 18 in parallel with the piston rod 19 of the cylinder 18.
It is slidably supported by guide tubes 22, 22 attached to the upper part of 8. Reference numeral 23 designates a sensor holder whose upper part is fixed to the distal end of the guide rod 21 on the conveying path 3 side and whose lower part is fixed to the distal end of the piston rod 19 of the cylinder 18, and when the holder 23 is in the mold matching position. When set, the tip of the holder 23 is adjusted to a height such that it can be inserted into the recess 10 at the rear of the mold 1 at the mold matching position by the extension of the piston rod 19. A through hole 24 is bored in the tip of the sensor holder 23 in parallel with the conveyance path 3, and a strain gauge type load cell (hereinafter referred to as , simply referred to as a load cell) 25 is attached with its pressure sensitive part facing inward. Note that a contact member 26 is fixed to the back surface of the load cell 25. Inside the through hole 24 is a head contacting member 27.
A shaft 29 with a coil spring 28 wound around the body is slidably inserted from the opening side at the other end, and in its natural state, the tip of the shaft 29 is The pressure sensing portion of the load cell 25 is kept in a non-contact state. The distance between the end faces of the abutment members 26 and 27 is designed so that in its natural state, it is slightly larger than the horizontal distance of the sensor clamping pressure space 12 defined by the molds 1 and 1 fitted together. has been done. The load cell 25 is electrically connected to a display meter (not shown), and the tip of the shaft 29 is connected to the load sail 2.
The force when pressing the pressure sensitive part 5 is displayed on the display meter.

In the embodiment, a strain gauge type load cell 25 is used as a pressure sensor, but the present invention is not limited to this, and for example, a strain gauge type earth pressure meter for civil engineering measurement may be used.

In addition, in the embodiment, the pressure is detected at the four corners of the mold mating surface, but the present invention is not limited to this, and the pressure may be detected at two locations on the left and right, or conversely, the pressure can be detected at the entire outer edge of the mold mating surface. Good too.

(Function) In the device configured as described above, the first mold (hereinafter referred to as
A preliminary mold (referred to as a preceding mold) 1 is made, the mold 1 is pushed out to a mold matching position on the conveyance path 3 by the extrusion plate 2, and a core 9 is set in the mold part 7 of the mold 1.
Next, when the carriage 16 is moved to the side of the mold matching position and the piston rod 19 of the cylinder 18 is extended, the tip of the sensor holder 23 is inserted into the recess 10 at the rear of the mold 1. After that, the second mold (hereinafter referred to as the subsequent mold) 1
When molded and pushed out onto the conveyance path 3, one side wall of the recess 11 at the front of the mold 1 eventually comes into contact with the contact member 26 on the back of the load cell 25 and presses it, so that the sensor holder 23 As a result, the abutting member 27 of the head of the shaft 29 comes into contact with one side wall of the recess 10 at the rear of the preceding mold 1. As the succeeding mold 1 is further pushed out, the sensor holder 23 is moved by the coil spring 28.
As a result, the tip of the shaft 29 comes into contact with the pressure sensitive part of the load cell 25 and presses it. At almost the same time, the mold matching between the preceding mold 1 and the succeeding mold 1 is completed, but the succeeding mold 1 is still pushed out by one mold, and as a result, the sensor holder 2
3 also moves to the back. After the mold matching and extrusion work is completed, a display meter (not shown) is checked, and then the piston rod 19 of the cylinder 18 is
is retracted to pull out the sensor holder 23 from the sensor clamping pressure space 12. As a result of the above check, if the displayed pressing force is less than a predetermined value (the pressure value at the mating surface of the molds that have been correctly matched), it is assumed that the molds are not matched properly and pouring into the molds 1 and 1 is prohibited. Take appropriate measures to prevent this. The above operations are considered as one cycle, and the same cycle is repeated thereafter to form a mold group in which a plurality of molds are connected.

(Effects of the invention) As is clear from the above explanation, the present invention detects the degree of adhesion of the mold mating surfaces using a strain gauge when fitting vertical frameless molds, and if the degree of adhesion does not reach a predetermined degree, The purpose is to avoid pouring into the mold due to poor mold matching. Therefore, according to the present invention, since molten metal is poured only into properly fitted molds, a healthy product can always be obtained. Also, since there is no leakage during pouring, there is no danger during work.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, and FIG. 2 is a longitudinal sectional view taken along line A--A in FIG. 1. 1: Vertical frameless mold, 3: Conveyance path, 4, 5: Mold mating surface, 10, 11: Recess, 12: Sensor clamping pressure space, 23: Sensor holder, 25: Strain gauge type load cell, 26, 27: Hitting member, 28:
Coil spring, 29: shaft.

Claims (1)

[Scope of utility model registration request] A sensor holder 23 equipped with a strain gauge 25 at its tip is placed on the side of the mold alignment position in the conveyance path 3 of the vertical frameless mold 1, and is capable of moving forward and backward with respect to the conveyance path 3, and is connected to the conveyance path 3. The height of the tip of the sensor holder 23 corresponds to the height of the recesses 11 and 10 formed in the outer edges of the mating surfaces 4 and 5 of the mold 1. A device for detecting the degree of adhesion of mold mating surfaces.