JPS6163336A - Vertically split die molding machine for integral joined casting mold and molding method thereof - Google Patents

Abstract

PURPOSE:To mold a hollow casting mold having internally gap parts by constituting a titled machine of right and left metallic patterns and a core metallic pattern which has patterns to form the gap parts for joining to the right and left half-split casting molds and moves and stops to and at the home position between the parting planes. CONSTITUTION:The right and left metallic patterns 1 and 2 are provided with the right and left half-split molding cavities for the intended casting mold on the parting planes thereof. The core pattern 3 is moved vertically to the home position between the parting planes of the light and left metallic patterns 1 and 2 by the operation of a cylinder 13. The core metallic pattern 3 has the patterns 3' for forming the gap parts for joining on both sides in the upper part thereof and are provided with the patterns 3' for forming the mold gap parts on both sides in the lower part. An unloader 4 is vertically moved by a cylinder contained therein and receives the finish casting mold joined integrally from the right metallic pattern 2 upset to face downward by the operation of an upsetting cylinder 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vertical split molding machine that integrally joins half-split molds (including cores) within the same molding cycle; Regarding the molding method, these molding means can also be applied to the molding method of an integrally bonded mold having an internal cavity.

Conventional technology A split mold making device equipped with a fixed mold, a movable mold, and a mandrel or an intermediate mold has been known for a long time.This split mold molding device uses a complicated mechanism to open and close the intermediate mold and can be opened and closed by one person. This method has the disadvantage that failures occur frequently due to the operation, and furthermore, it is not known that a hollow mold having a bag-like cavity inside can be molded in one molding cycle.

In addition, the current practice of integrating molds is to mold half molds (including the core) using separate molding machines, then take out each half mold and glue them together using separate adhesive machines.

The half molded mold (including the core) is subjected to the same molding cycle (
That is, the present invention provides a molding device and a molding method that use the same molding material without using an adhesive or the like in the same molding machine, and that can obtain an integrally bonded mold having a void inside.

The configurations of the apparatus and molding method of the present invention are as specified in each of the claims above, and will be explained in detail based on the attached drawings showing one specific example of the present invention.

FIG. 1, which shows an example of the apparatus of the present invention, is a front view showing only the main parts, in which 1 is a left mold, 2 is a right mold, 6 is a core mold, 4 is an unloader, and 15 is a blow head.

The drawer is a gashing spatula, and the other members shown are those included in a normal vertical split molding machine unless otherwise specified.

The left mold 1 has a mechanism in which it slides along a guide rod 10 by the operation of a cylinder 11. The right mold 2 similarly slides left and right by the operation of the cylinder 12. These left and right molds 1 and 2 have, on their split surfaces, mold-making cavities for the left and right halves of the mold, which are used as weights.

The core mold 6 is moved up and down to a fixed position between the split surfaces of the left and right molds by the operation of the cylinder 15. This core mold 6 has a pattern 3' on both sides of its upper part, which forms a joining cavity, which will be described later.
A /4 turn 3' forming a mold cavity 24 is provided on both sides of the lower part. The unloader 4 is raised and lowered by a built-in cylinder, and receives the integrally joined completed molds from the right mold 2 which has been reversed downward by the operation of the reversing cylinder 14. In the above embodiment, the left and right molds 1 and 2 are Although we used a mechanism in which the molds slide left and right, either one of the molds may be fixed.
In that case, it is necessary for the core mold 3 to not only move up and down, but also move from side to side.

The main mechanism of the vertically split molding machine for integrally joined molds of the present invention has been described above, and an example of a method for manufacturing integrally joined molds using the manufacturing apparatus of the present invention will be explained based on Figs. fX2 to Fig. 11.

FIG. 2 shows the arrangement of each member at the beginning of the mold making/joining cycle, which is the same as the arrangement shown in FIG.

FIG. 3 shows the mold matching and blowing process, in which the core mold 6 rises and stops at a predetermined position, and the left and right molds 1 and 2 are slid to align the molds on both sides of the core mold 3. A state in which the blow head 5 is pressed onto the upper surface of the mold assembly and molding sand 20 is blown is shown. Figure 4 shows the f-thinning process. After the blowing of the molding sand is completed, the blow head 5 is returned to the predetermined position, and the gossing head 6 is pressed onto the upper surface of the mold assembly to perform the glassing process. After the opening process is shown and the filled molding sand is hardened after 1f shinging, the left casting amount is 1, the right mold is 2, and the W of the core mold 3 is
Perform K-type opening, and insert half mold 21 into left and right molds 1 and 2.
and 22 are molded and held as shown in the figure.0 Figure 6 shows the mold matching process, in which the left and right molds holding the half molds 21 and 22 are slid as shown by the arrows to match the molds. By doing this, a joining cavity 23 and a mold cavity 24 (bag-like cavity or blind hole-like cavity) are formed.

FIG. 7 shows a process of filling the joining cavity 23, in which the blow head 5 is crimped onto the upper surface of the matched left and right molds (holding the half molds 21 and 22), and the joining cavity is filled. 2
Blow molding sand into Step 6.

FIG. 8 shows the gushing process of the silica sand filled into the joining void 23, and after the filling process is completed,
5th return? l't), press the gutsing head 6 onto the top surface of the matched mold, and press it! Tushing is performed to harden the molding sand filled in the joining void, and the half mold 21 is
22 is an integrally joined mold 25.

9 to 11 show the mold release process of the integrally joined mold 25. In FIG. 9, the extrusion mechanism of the left mold 1 is operated, and while the integrally joined mold 25 is held in the right mold 2, Slide the right mold 2 in the direction of the arrow. Then, as shown in FIG. 10, the right mold 2290° is reversed downward by the operation of the reversing cylinder 14, and the extrusion mechanism built in the right mold 2 extrudes the integrally bonded mold 25 onto the unloader 4, and the mold is released. At the same time, the left mold 1 is returned to the predetermined position.Finally, as shown in Figure 1I, the right mold 2 is reversed and returned to the predetermined position, and the released integrally bonded mold 25 is carried out of the molding machine. Then move on to the next molding/joining cycle.

The above is one molding/joining cycle in the illustrated example, but the structure and operation mode of each member can be slightly changed or modified based on known means without being limited to this example. For example: (1) One of the left and right molds is a fixed mold, and the core mold is a mechanism that can move vertically and horizontally (2) The unloader is not limited to the type shown in the drawings, but also has a known unloading mechanism. It can be done.

(3) It can be applied not only to the cold box method but also to the heating molding method. (4) It can be applied not only to core molding but to all mold molding.

(5) It can also be applied to simple integral joints without internal voids.

(6) By using a combination mechanism of a plurality of movable molds and a plurality of core molds, it is possible to mold a large number of molds in a molding/joining cycle. 'Effects of the invention +1') Since this is not a method of adhering cast enamel using adhesive or the like, there is no need to consider the adhesive thickness.

It is possible to create molds with high precision.

(2) With the same molding machine, by adding one step to the opening and closing process of the left and right metal parts, molding and joining can be performed, and a finished mold that is integrally joined can be obtained. (3) Core mold with two split surfaces By using
Compared to conventional molding methods using mandrels, molding is possible regardless of the draft angle.

(4) It is easy to make molds with voids that are difficult to release, and it can be applied to both types of molding.

(6) Since the half-split molds are molded at the same time, twice as many products can be obtained as compared to the conventional method of molding each mold individually.

The number of molding machines can be halved.

(7) Handling between the molding machine and the bonding machine is no longer necessary, and the initial cost is also low.

(8) It is possible to omit the conventional system's inserts and gas needles, as well as the provision of "Oiteko" and the like.

[Brief explanation of the drawing]

FIG. 1 is a front view showing only the main parts of an example of the device of the present invention;
FIGS. 2 to 11 are explanatory diagrams sequentially showing the molding and integral joining processes of the present invention. In one figure, 1 is a left mold, 2 is a right mold, and 3 is a core mold. 4 is an unloader, 15 is a blow head, 6 is a gutting head, 10 is a peeling rod, 11° and 12 are cylinders for operating the left and right molds, respectively, 13 is a cylinder for lifting and lowering the core mold, 14 is a cylinder for reversing the right mold. , 20 is molding sand, 21.22 is a hardened half-split mold, 23 is a joining cavity, 24 is a mold cavity, and 25 is an integrally joined mold.

Claims (7)

[Claims] (1) The left and right molds and the left and right half-split molds have a pattern for forming a joining cavity, and the core mold moves and stops at a predetermined position between the split surfaces of the left and right molds. Vertical split molding machine for integrally joined molds. (2) A vertically split molding machine for an integrally joined mold according to claim 1, in which at least one of the left and right molds can be opened and closed. (3) A vertically split molding machine for an integrally joined mold according to claim 1, wherein the core mold is movable vertically and horizontally. (4) The vertical split molding machine for an integrally joined mold according to claim 1, wherein the core mold also has a pattern for forming a void in the integrally joined mold. (5) A vertical split molding machine consisting of left and right molds and a core mold that has a pattern for forming a joining cavity in the left and right half molds and that moves and stops at a fixed position between the split surfaces of the left and right molds. It consists of combining the steps of mold matching, blowing, curing, mold opening, mold matching of a group of molds holding split molds, blowing into the joining gap, re-hardening, mold release, and unloading. A molding method for integrally bonded molds characterized by: (6) The method of manufacturing an integrally bonded mold according to claim 5, wherein the curing and re-hardening are curing with a reactive gas or heat curing. (7) The method for making an integrally joined mold according to claim 5, wherein the core mold of the vertically split molding machine is also provided with a pattern for forming a void in the integrally joined mold.