JP2006315034A - Apparatus for releasing molding flask in sand mold with molding flask in which molten metal is poured - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for releasing a molding flask in a sand mold with the molding flask in which molten metal is poured, with which occurrence of hitting mark, crack, strain on an as-cast material, that is, a product can be prevented. <P>SOLUTION: In the apparatus for releasing the flask in the sand mold with the flask in which the molten metal is poured, with which after separating an upper flask while leaving the product in a lower mold with a lower molding flask from the upper/lower molds with the upper/lower molding flasks in which the molten metal is poured after matching the molds, the product and the lower mold are taken out from the lower mold with the lower flask where the product is left, from the upper part toward the lower part, it is provided with a punch-head arranged at the upper part of the lower mold with the lower flask where the product is left and a punch-head elevating and lowering means for elevating/lowering the punch-head, and a pushing-out member which is higher than the height of the upper flask, is fitted to the lower end periphery of the punch-head. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a demolition apparatus for a sand mold with a poured frame.

  Conventionally, in a fresh sand mold with a frame, an apparatus for extracting a poured mold from a cast frame has been publicly known (see, for example, Patent Document 1).

Japanese Utility Model Publication 59-1460 (1st page, Fig. 1)

As a recent trend of castings produced with green sand molds, casting materials are required to be thinner and more accurate. Therefore, molds are required to have high strength, and molding machines are required to mold high-strength molds. Progressing. When such a high-strength mold is extracted from the casting frame, it is necessary to increase the output of the mold extraction apparatus. However, when a mold is extracted at a high output, there is a problem that dents, cracks, and distortion are generated in a cast material that is thin, light, and highly accurate.

  The present invention has been made in view of the above-mentioned problems, and is a demolding device for a sand mold with a poured frame that can prevent casting material, i.e., product, from being dented, cracked, or distorted. The purpose is to provide.

  In order to achieve the above object, the unsealing device for the sand mold with a poured frame according to the present invention is an upper mold with an upper and lower frame that has been poured in a mold and poured while leaving the product in the lower mold with a lower frame. A demolding device for a sand mold with a poured-out frame that extracts the product and the lower mold downward from above from the lower mold with the lower frame after separating the frame, wherein the product remains A punch head disposed above the lower mold with a lower frame, and a punch head lifting / lowering means for moving the punch head up and down, and an extrusion member higher than the height of the upper frame is provided at the lower edge of the punch head. It is attached.

  Further, the unsealing device for the sand mold with a poured frame according to the present invention is characterized in that a part of the lower end of the push-out member is formed as a protrusion protruding from the lower end.

  Further, the unsealing device for the sand mold with poured frame in the present invention is a sand mold with poured frame that extracts the product and the upper and lower molds from above and below from the upper and lower molds with the upper and lower frames that have been poured in a mold. A punch head disposed above the upper and lower molds with the upper and lower frames, and a punch head lifting and lowering means for lifting and lowering the punch head. An extrusion member is attached.

  The present invention separates the upper frame from the upper and lower molds with the upper and lower frames that have been mold-matched and poured, leaving the product in the lower mold with the lower frame, and then removes the product from the lower mold with the lower frame to which the product remains. A demolding apparatus for a sand mold with a poured frame for extracting a lower mold from above to below, a punch head disposed above the lower mold with a lower frame in which the product remains, and the punch head And a punch head raising / lowering means for raising and lowering, and an extrusion member higher than the height of the upper frame is attached to the lower peripheral edge of the punch head. There are various effects such as being able to prevent.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. An upper mold Ua and a lower mold Sa (see FIG. 3) described later are green sand molds in the embodiment of the present invention. First, the first embodiment will be described. In FIG. 1, a lower mold S with a lower frame in which a product W remains is carried into a mold extraction station N by a roller conveyor 1 (see FIG. 2) as a conveying means. A punch head 2 is disposed above the lower mold S with the lower frame where the product W is left, and scrapers 3 and 3 for cleaning the inner surface of the lower frame Sb at the upper peripheral edge of the punch head 2. Many are attached.

  A punch head lifting / lowering cylinder 4 as a punch head lifting / lowering means for lifting the punch head 2 is disposed above the punch head 2, and the punch head lifting / lowering cylinder 4 is mounted downward on a frame 5. Yes. The tip of the punch head lifting / lowering cylinder 4 is connected to the punch head 2. Guide rods 6 and 6 are disposed on both outer sides of the punch head elevating cylinder 4, and the guide rods 6 and 6 can slide up and down in holders 7 and 7 attached to the frame 5. It is penetrated. The tips of the guide rods 6 and 6 are connected to the punch head 2.

  Extruding members 8, 8 higher than the height of the upper frame Ub (see FIG. 3) are attached to the peripheral edge of the lower end of the punch head 2 over the entire circumference. Note that the center of the lower end of the extrusion members 8, 8 attached to the lower end in the longitudinal direction of the punch head 2 is a protruding portion 8 a, 8 a that protrudes from the lower end. Moreover, the code | symbol U in FIG. 3 is an upper mold with an upper frame.

  The operation of the apparatus configured as described above will be described. The upper and lower molds M (see FIG. 3) with the upper and lower frames that have been mold-matched and poured are separated by the upper frame separating means (not shown) while the product W remains in the lower mold S with the lower frame. Thereafter, the lower mold S with the lower frame in which the product W is left is carried into the mold extraction station N by the roller conveyor 1 (see FIG. 1). When the upper frame Ub is separated, the upper mold Ua collapses and a part remains in the upper frame Ub. Further, a part remains around the product W (see FIG. 1).

  Next, the punch head elevating cylinder 4 is extended to lower the punch head 2 and the extruding members 8 and 8, and the product W and the lower mold Sa are moved from above from the lower frame-attached lower mold S where the product W is left. Pull out downward (see FIG. 4). The extracted product W and the lower mold Sa are received by mold receiving means (for example, a vibrating conveyor) (not shown).

  Next, the punch head elevating cylinder 4 is contracted to raise the punch head 2 and the extruding members 8 and 8. Thereafter, the empty lower frame Sb is unloaded from the mold extraction station N by the roller conveyor 1. As the punch head 2 is raised and lowered, the inner surface of the lower frame Sb is cleaned by the scrapers 3 and 3. The extracted product W and the lower mold Sa are sent to the next process (not shown) by the mold receiving means. Further, the separated upper frame Ub is transported to the next step (not shown) in an empty state after the upper mold Ua remaining in the upper frame Ub is extracted.

  In the present invention, extrusion members 8 and 8 higher than the height of the upper frame Ub are attached to the peripheral edge of the lower end of the punch head 2. For this reason, the peripheral edge of the lower mold Sa remaining in the lower frame Sb is pushed by the extruding members 8 and 8 to extract the product W and the lower mold Sa, so that the product W is not directly damaged by the punch head 2. Therefore, it is possible to prevent dents, cracks and distortions from occurring in the product W.

  Further, when a part of the lower end of the extrusion member 8, 8 is formed as a protrusion 8a, 8a protruding from the lower end, the lower mold Sa is pulled out while collapsing the lower mold Sa with the protrusion 8a, 8a. Since the output at the time of extraction of the actuator for extraction, that is, the punch head lifting cylinder 4 can be reduced, it is more preferable. In the present embodiment, the center of the lower end of the extruding members 8 and 8 attached to the lower end in the longitudinal direction of the punch head 2 is the projecting portions 8a and 8a projecting from the lower end, but the projecting portions 8a and 8a The position is not limited to this, and the position is not limited as long as the protrusions 8a and 8a project part of the lower ends of the extrusion members 8 and 8 from the lower ends.

  Next, a second embodiment will be described. In the second embodiment, as shown in FIG. 5, the upper and lower frame-equipped upper and lower molds M that have been mold-matched and poured are carried into the mold extraction station N as they are. Further, block-like push-out members 9 and 9 are attached to the entire periphery of the lower edge of the punch head 2. A plurality of guide members 10 and 10 are attached to the lower ends of the push-out members 9 and 9 at intervals over the entire circumference. Except for these configurations, the configuration is the same as that of the first embodiment.

  The operation of the apparatus configured as described above will be described. The upper and lower framed upper and lower molds M, which have been mold-matched and poured, are carried into a mold extraction station N (see FIG. 5) by a roller conveyor 1 (see FIG. 6) as a conveying means. Next, the punch head elevating cylinder 4 is extended to lower the punch head 2, the extruding members 9 and 9, and the guide members 10 and 10, and the product W and the upper and lower molds Ua and Sa are moved from the upper and lower molds M with the upper and lower frames. Is extracted downward from above (see FIG. 7). The extracted product W and the upper and lower molds Ua and Sa are received by a mold receiving means (for example, a vibrating conveyor) (not shown).

  Next, the punch head elevating cylinder 4 is contracted to raise the punch head 2, the pushing members 9 and 9, and the guide members 10 and 10. Thereafter, the emptied upper and lower frames Ub and Sb are carried out from the mold extraction station N by the roller conveyor 1. As the punch head 2 moves up and down, the inner surfaces of the upper and lower frames Ub and Sb are cleaned by the scrapers 3 and 3. The extracted product W and the upper and lower molds Ua and Sa are sent to the next process (not shown) by the mold receiving means.

  In the present invention, the extrusion members 9 are attached to the entire periphery of the lower edge of the punch head 2. As a result, the entire periphery of the upper mold Ua is uniformly pushed by the extruding members 9 and 9 so as to extract the product W and the upper and lower molds Ua and Sa, so that the upper and lower molds Ua and Sa containing the product W are not collapsed as much as possible. It can be extracted from the upper and lower frames Ub, Sb. For this reason, the output of the punch head lifting cylinder 4 is hardly applied to the product W itself. Therefore, it is possible to prevent dents, cracks and distortions from occurring in the product W.

  As described above in the first embodiment and the second embodiment, in the present invention, it is possible to prevent dents, cracks, and distortions from occurring in the product W during the extraction. For this reason, the thinning and high precision of the product W can be promoted. In particular, thin-walled aluminum castings using raw sand molds for large-mix low-volume production and to avoid the use of expensive molds are effective in preventing deformation of the material at the time of frame opening.

It is a front view which shows 1st Embodiment of this invention. It is an AA arrow line view in FIG. It is a front view which shows the up-and-down frame with an up-and-down frame which was mold-matched and poured. It is a front view which shows the state which extracted the product and the lower mold from upper direction toward the downward direction from the lower mold with a lower frame in which the product was left. It is a front view which shows 2nd Embodiment of this invention. It is a BB arrow line view in FIG. It is a front view which shows the state which extracted the product and the upper and lower molds from the upper part to the lower part from the upper and lower molds with the upper and lower frames.

Explanation of symbols

2 Punch head 4 Punch head lifting / lowering means 8 Extruding member 8a Protruding part 9 Extruding member M Upper / lower mold U with upper / lower frame U Upper mold with upper frame S Lower mold with lower frame Ub Upper frame Sb Lower frame Ua Upper mold Sa Lower mold W Product

Claims (3)

After separating the upper frame from the upper and lower molds with the upper and lower frames that have been combined and poured, leaving the product in the lower mold with the lower frame, the product and the lower mold are moved upward from the lower mold with the lower frame where the products are left. A demolding device for a sand mold with a poured frame that is drawn downward from a punch, the punch head disposed above the lower mold with a lower frame in which the product remains, and a punch that raises and lowers the punch head A lifting and lowering means, and an extrusion member higher than the height of the upper frame is attached to the peripheral edge of the lower end of the punch head. 2. The unpacking device for a sand mold with a poured frame according to claim 1, wherein a part of the lower end of the push-out member is formed as a protrusion protruding from the lower end. A demolding device for a sand mold with a poured frame, for extracting products and upper and lower molds from above and below from an upper and lower mold with an upper and lower frame that has been mold-matched and poured, and above the upper and lower mold with an upper and lower frame A sand mold with a poured frame, comprising: a punch head disposed; and a punch head elevating means for elevating the punch head; and an extrusion member is attached to the entire periphery of the lower end of the punch head. Unpacking device.