JPH0340445Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to store the core in the shell main mold at a core placing station on a line where the shell main mold is placed on a pallet and transported. This invention relates to a main mold positioning device for storing a core.

(Prior Art) As shown in Japanese Unexamined Patent Publication No. 58-125338, a device in which a core is automatically clamped by a clamping device and set in a main mold is known.

On the other hand, in a method in which the main shell mold is positioned at a core holding station, the main shell mold is pitch-fed together with the pallet, and is roughly positioned within a certain range while being movable at the core holding station. The supported core setter is accurately positioned on this station, and when placing the core, the main shell mold is moved along with the pallet to match the core setter. That is, in this case, when the core slides on the slope for the draft of the main mold when descending, the main mold and pallet are moved and positioned with respect to the core setter.

(Problem that the invention aims to solve) However, in this method, the heavy pallet is moved by the lowering of the core through the main mold, which is a fragile object, so the main mold is subjected to an excessive load. There is a risk of damage. Also, the main mold and core rub against each other, causing shell sand to fall into the cavity.
There is a risk of sand build-up.

On the other hand, it is possible to accurately position the pallet with respect to the core setter, but even in that case, the shell main mold is susceptible to molding errors and temperature conditions during transportation, that is, differences in the amount of thermal expansion. There are variations in dimensions, making it difficult to clamp and position accurately. Also, it is possible to position the mold with respect to the pallet when placing it on the pallet, but in addition to the size problem mentioned above, rough positioning is not possible due to workability and other reasons, and the core and shell main mold cannot be properly positioned. The problem of sand trapping due to contact still remains.

In view of this, the present invention provides a positioning device that takes into account the thermal expansion of the main shell mold and can position the main shell mold in a core holding station without damaging it, thereby preventing sand traps, etc. The idea is to make it possible to hold the core ceremony without being invited.

(Means for Solving the Problems) In order to achieve the above object, the solution means of the present invention is a core in a line that conveys a pallet having a positioning part on the side by placing a shell main mold on the pallet. The present invention is based on a core-accommodating main mold positioning device that is provided on a housing station and is used to position the shell main mold in order to store the core in the shell main mold. and movable in directions facing each other in the conveying direction on the sides of the core storing station, and positioning the pallet in the core storing station by inserting the positioning portion of the pallet from the front and back in the conveying direction. a pair of clamp arms; a clamp arm operating means for operating the pair of clamp arms to position the pallet when the pallet is carried into the core storing station; movable in directions facing each other in the conveyance direction, one of which abuts against the shell main molds on the pallet to apply a shifting action to the shell main molds from the front side or the rear side in the conveyance direction; The shuffling arms are moved so that the relative positional relationship between the pair of shuffling arms and the shell main mold with respect to the pallet in the conveying direction is almost constant within a predetermined tolerance range in which the shell main mold is not clamped by the both shuffling arms. and a shifting arm operating means for operating the pair of shifting arms to perform a shifting operation of the shell main mold after positioning the pallet by operating the clamp arm operating means. do.

(Function) As a result, the clamp arm positions and clamps the pallet. after that,
The shifting arm moves the shell main mold within a certain range, thereby allowing for dimensional errors in the shell main mold.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows the relationship of the core transport system path to the core storage station 2 of the main mold transport line 1. As shown in FIG. In this case, the main mold 3 is obtained by the shell molding method, and is transported along with the pallet 4 and positioned at the core holding station 2. The core 5 is arranged to be placed in the main mold 3 of the core placing station 2 via a core assembly station 6 located beside the main mold conveying line 1, via a core picking station 7.

That is, first conveyance rails 8, 8 extending from the assembly station 6 of the core 5 to the pick-up station 7 are provided parallel to the main die conveyance line 1. Further, between the picking station 7 and the intermediate loading station 2, there are traveling frames 10, 10 supported by a support 9.
This running frame 10,
10 is provided with second transport rails 11, 11. A first moving carriage 12 supporting a core assembly device (not shown) is movably mounted on the first transport rails 8, 8, and the core 5 is moved on the first moving carriage 12 at the assembly station 6. The cores are assembled and transported as they are to the core picking station 7. Further, a second movable trolley 15, which supports the core setter 13 so as to be movable up and down by a lifter 14, is movably mounted on the second conveyance rails 11, 11.
is picked up by the core setter 13, transported to the core placement station 2 by the second movable cart 15, and placed in the main mold 3 by the descent of the core setter 13. The first and second movable carts 12 and 15 are reciprocated by cylinder devices 16 and 17.

As shown in FIG.
20, and left and right horizontal support rollers 2
1 and 21 are brought into contact with each other so as to be positioned in the width direction and transported. This conveyance means includes a cylinder device arranged in the conveyance direction,
A pitch feeding device is adopted in which the pitch is fed by this cylinder device and is combined with a lever that can be engaged with and detached from the pallet 4.

The core holding station 2 is provided with a pallet clamping mechanism 22 and a main shifting mechanism 23. First, pallet clamp mechanism 2
2, the pallet 4 is provided with a positioning protrusion 24 as a positioning portion projecting upward at a side portion of the upper surface thereof. A pair of front and rear clamp arms 26 and 27 are attached to the base 25 of the main mold conveyance line 1 on the side of the core storage station 2, and a pair of clamp arms 26 and 27 are used to move the positioning protrusion 24 at a predetermined position of the core storage station 2 from the front and rear directions. It is supported so that it can rotate horizontally so that it can be pinched. In this case, gears 29 and 29 that mesh with each other are coupled to support shafts 28 and 28 to which both clamp arms 26 and 27 are fixed, respectively, and a rotation arm 30 that is integrally provided with one of the clamp arms 27 and a column 31 fixed to the base 25 are connected by a clamping cylinder device 32, and when the pallet 4 is carried into the core storage station 2, the pair of clamp arms 26 and 27 are used to position the pallet 4. The clamp arm actuating means is configured to actuate the clamp arm to perform the following operations.

Next, to explain the main type shifting mechanism 23,
Horizontal support shafts 3 are installed at both front and rear sides of the pallet clamp arms 26 and 27 of the core holding station 2.
3 and 33 are supported by support columns 31 and extend in a direction perpendicular to the main mold conveyance direction. A pair of left and right shifting arms 34, 34, 35, 35, one of which abuts against the main mold 3 and applies a shifting action to the main mold 3 from the front or rear, are fixed to both the support shafts 33, 33. ing. Further, the rotating arms 36, 36 fixed to the support shafts 33, 33 and the support stand 37 fixed to the base 25 at the center position between both the support shafts 33, 33 are respectively cylinders for shifting as a means for operating the shifting arms. They are connected by devices 38,38. As shown in FIG. 4, stoppers 39, 39 are fixed to both the support shafts 33, 33, and these stoppers 39, 39 are moved by the rotation of the shifting arms 34, 35 in the shifting direction. The arm 3 is brought into contact with the stopper members 40, 40 fixed to the pillars 31, 31.
4 and 35 constitutes a regulating means adapted to regulate the amount of gathering.

That is, the main mold 3 has cutouts 41, 41 that open laterally in the flange 3a, and as shown in the enlarged side view in FIG. pin 4
2 is inserted into the notch 41. The difference between the notch width W and the diameter D of the pin 42 is several millimeters due to thermal expansion of the main die 3, wear of the pin 42, etc.
The shifting arms 34 and 35 are arranged to maintain a gap between the pin 42 and the notch 41 in the relative position of the main die 3 with respect to the pallet 4 in the conveyance direction.
In order to provide the main die 3 with a shifting action so that S ₁ and S ₂ are approximately constant, the stoppers 39 and 39 move the front and rear shifting arms 34 and 35 in consideration of dimensional errors due to thermal expansion of the main die 3, etc. The amount of shifting of the shifting arms 34 and 35 is regulated so that the main die 3 is not completely clamped. In this case, the sequence of both mechanisms 22 and 23 is set so that the main shifting mechanism 23 is operated after the pallet clamping mechanism 22 is operated.

Therefore, in the above embodiment, when the main mold 3 is pitch-fed to the core holding station 2 together with the pallet 4, first, the clamping cylinder device 32
is activated, and the front and rear clamp arms 26, 27 linked by gears 29, 29 clamp the positioning protrusions 24 of the pallet 4 from the front and rear, fixing the pallet 4 in a fixed position. At this point, main type 3
The front and rear gaps S ₁ and S ₂ between the notch 41 of the pallet 4 and the pin 42 of the pallet 4 are such that, for example, S ₁ >S ₂ = 0, and there is no external restriction, and the positioning of the main mold 3 is Not done.

Then, next, the cylinder devices 38, 38 for shifting
is activated, the shifting arms 34, 35 rotate from the front and rear, and apply a shifting motion to the main mold 3 until the stoppers 39, 39 abut against the stopper members 40, 40. In other words, if the main mold 3 is misaligned with respect to the pin 42 on the pallet 4, for example when S ₁ > S ₂ , the rear shifting arm 35 will come into contact with the flange of the main mold 3, causing the main mold 3 to Gap before and after the above pin 42
It is moved on the pallet 4 until S ₁ and S ₂ become approximately constant, while the front shifting arm 34 rotates but does not come into contact with the main mold 3. Conversely S ₂
>When S ₁ , only the front shifting arm 34 is the main type 3
Applying a biasing motion to S ₁ ≒ S ₂ .

Since the main mold 3 is not clamped by the front and rear shifting arms 34 and 35 when subjected to the shifting operation, even if there is a dimensional error in each main mold 3, it will not be damaged. Therefore, the main die 3 is positioned on the core placing station 2 within an extremely small tolerance to prevent it from being completely clamped, and interference between the main die 3 and the core 5 occurs when the core setter 13 places the core. This makes it easier to prevent. For example, if the core setter 13 supports the core 5 in a horizontal plane so that it can float, the core setter 13 can be mechanically positioned on the core retainer station 2, and the core 5 can be moved to the main mold 3. This allows the shell sand to be stored smoothly without causing any damage to the shell.

In the above embodiment, the front and rear shifting arms 34 and 35 do not need to rotate in the shifting direction at the same time, but may be rotated one by one with a time delay.

Further, the clamp arm and the shifting arm do not necessarily have to be rotated to perform clamping or shifting, but may be made to perform such operations by linear movement from the front and back.

Further, regarding the pallet clamp mechanism, although it is provided only on one side of the main mold conveyance line in the above embodiment, it may be provided on both sides.

It goes without saying that the present invention can also be used for positioning the main mold for housing the core in molds other than cylinder block molds.

(Effects of the invention) According to the invention, the clamp arm positions and clamps the pallet, and the rearward moving arm moves the shell main mold within a certain range without clamping, thereby allowing for dimensional errors in the shell main mold. As a result, the shell main mold can be reliably positioned in a substantially fixed position without causing damage, regardless of dimensional errors due to thermal expansion, etc., and interference between the main mold and the core when the core is placed in the main mold is avoided. Prevention is easy.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing the relationship between the main mold conveyance line and the core conveyance line, FIG. 2 is a front view partially showing the core storage station, and FIG. 4 is a side view showing the main mold gathering mechanism, and FIG. 5 is an enlarged side view showing the relationship between the main mold and the pallet. DESCRIPTION OF SYMBOLS 1... Main mold conveyance line, 2... Core storing station, 3... Main mold, 4... Pallet, 5... Core, 22... Pallet clamp mechanism, 23... Main mold shifting mechanism, 24 ...Positioning protrusion, 26, 27
...Clamp arm, 32...Cylinder device for clamping, 34, 35...Movement arm, 38...Cylinder device for shift, 39...Stopper, 40...
Stopper member.

Claims (1)

[Claims for Utility Model Registration] A pallet having a positioning portion on the side is provided at a core placing station in a line in which a shell main mold is placed on the pallet and conveyed, and for storing the core in the shell main mold. A core accommodating main mold positioning device for positioning the shell main mold, which is provided on the side of the core accommodating station so as to be movable in directions facing each other in the conveyance direction, and includes a positioning section for the pallet. a pair of clamp arms for positioning the pallet at the core placement station by sandwiching the pallet from the front and back in the transport direction; and a pair of clamp arms for positioning the pallet when the pallet is carried into the core placement station. clamp arm actuating means for operating the core holding station; and a clamp arm actuating means that is movable in opposite directions in the conveying direction at front and back positions of the core holding station in the conveying direction, one of which abuts against the shell main mold on the pallet. a pair of shifting arms for applying a shifting action to the shell main mold from the front side or the rear side in the conveyance direction; and a relative positional relationship of the shell main mold to the pallet in the conveyance direction such that the shell main mold is not clamped by the two shifting arms. a regulating means for regulating the moving end of the shifting operation of each of the shifting arms so that it remains approximately constant within a predetermined tolerance; A main mold positioning device for storing a core, comprising a moving arm actuating means for operating the mold to move the mold.