Wood mould frame for sand mould casting

Abstract

The utility model belongs to the technical field of casting molds, and particularly relates to a wood mold frame for sand mold casting, which comprises a bottom plate, a first long side plate, a first short side plate, a second long side plate and a second short side plate, the first long side plate, the first short side plate, the second long side plate and the second short side plate are connected in sequence, and a rectangular casting cavity is enclosed by the first long side plate, the first short side plate, the second long side plate and the second short side plate and the bottom plate; the bottom plate, the first long side plate, the first short side plate, the second long side plate and the second short side plate are spliced wood plates which are formed by arranging and bonding a plurality of transverse grain battens and a plurality of vertical grain battens at intervals in the transverse direction, and resin impregnated paper fixed through a hot pressing process is arranged on the sides, facing a casting cavity, of the spliced wood plates; and a supporting frame is arranged on the side, opposite to the casting cavity, of a splicing wood plate of the first long side plate, the first short side plate, the second long side plate and the second short side plate. The wood mold frame for sand mold casting is not prone to deformation and high in tolerance, the service life is prolonged, meanwhile, large-size pure solid wood is not needed, and the production cost of a factory is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting molds, and particularly relates to a wooden mold frame for sand casting. Background Art

[0002] Currently, the primary wood molds used in aluminum alloy sand casting are made of pure solid red pine, which is prone to deformation during high-stress processing, prolonged storage, and high humidity fluctuations. Furthermore, large-scale solid wood is expensive, and the surface is burred and lacks a smooth finish after machine planing, requiring repeated manual varnishing and polishing, a complex process. Utility Model Content

[0003] In response to the problems in the prior art such as the easy deformation of the pure solid wood board on the molding surface of the wooden mold frame, low surface treatment efficiency, short service life, and high storage conditions, the utility model provides a wooden mold frame for sand casting, which is not easy to deform, has strong tolerance, and extends the service life. At the same time, it does not require large-sized pure solid wood, thereby reducing factory production costs.

[0004] Specifically, the present invention provides the following technical solutions:

[0005] A wooden mold frame for sand casting, comprising a bottom plate, a first long side plate, a first short side plate, a second long side plate, and a second short side plate, wherein the first long side plate, the first short side plate, the second long side plate, and the second short side plate are sequentially connected and enclose a rectangular casting cavity with the bottom plate;

[0006] The bottom plate, the first long side plate, the first short side plate, the second long side plate and the second short side plate are all made of a plurality of horizontal wood strips and a plurality of vertical wood strips arranged and bonded in a transverse manner, and the side of the spliced wood strips facing the casting cavity is made of resin-impregnated paper fixed by a hot pressing process;

[0007] A support frame is provided on the side of the spliced wood board of the first long side board, the first short side board, the second long side board and the second short side board facing away from the casting cavity.

[0008] Preferably, the cross-sections of the horizontal and vertical wood strips are trapezoidal structures of the same size.

[0009] Preferably, both ends of the first long side plate and the second long side plate are respectively provided with positioning grooves, and the first short side plate and the second short side plate are inserted into the positioning grooves of the first long side plate and the second long side plate.

[0010] Preferably, opposite through holes are provided at both ends of the first long side plate and the second long side plate, screws are installed in the opposite through holes, and nuts are fastened at both ends of the screws.

[0011] The short side wood board of the utility model is positioned in the long side wood board positioning groove, and the long side wood board is positioned by screw rods and nuts.

[0012] Preferably, the support frame is composed of two horizontal wooden support bars and a plurality of vertical wooden support bars that are perpendicularly crossed; the perpendicularly crossed horizontal support bars and vertical support bars are built into a plurality of grid structures.

[0013] Preferably, the vertical wooden support bar and the two horizontal wooden support bars are connected by mortise and tenon joints.

[0014] Preferably, the thickness of the support frame is 3 to 8 times the thickness of the spliced wooden boards.

[0015] The beneficial effects of the present invention are at least:

[0016] 1) The present invention provides a wooden mold frame for sand casting, wherein the bottom plate and side plates are made of spliced wooden boards with alternating horizontal and vertical wood strips, which can effectively prevent stress deformation of unidirectional wood grain boards;

[0017] 2) The wooden mold frame for sand casting provided by the present invention has a base plate and side plates made of small wooden boards, which makes the raw material structure flexible and the cost low;

[0018] 3) The utility model provides a wooden mold frame for sand casting, which uses resin-impregnated paper fixed by a hot pressing process as the sand mold forming surface, which can effectively improve the surface finish and flatness, prevent the wood from absorbing moisture, increase the surface strength of the solid wood board, and reduce the storage requirements of the mold;

[0019] 4) The utility model provides a wooden mold frame for sand casting, in which the four enclosed side wooden boards are reinforced by a support frame, thereby ensuring the strength of the wooden mold (when the wooden mold is filled with sand, the weight of the sand will increase the pressure in the lower part of the mold). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A top view of the wooden mold frame used for sand casting. Figure 1 In the figure, 1-bottom plate, 2-first long side plate, 3-first short side plate, 4-second long side plate, 5-second short side plate, 6-positioning groove, 7-screw, 8-nut.

[0021] Figure 2 It is a front view of the first long side panel. Figure 2 In the figure, 9 is a horizontal support bar, 10 is a vertical support bar, and 11 is a through hole.

[0022] Figure 3 This is a structural diagram of spliced wooden boards, where the upper picture is a top view and the lower picture is a front view. Figure 3 In the middle, 12-horizontal-grained wood strips, 13-vertical-grained wood strips, 14-resin-impregnated paper. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the field or the product instructions shall be followed.

[0024] Example 1

[0025] Example 1 provides a wooden mold frame for sand casting, which can be seen in Figure 1-3 , comprising: a bottom plate 1, a first long side plate 2, a first short side plate 3, a second long side plate 4 and a second short side plate 5, wherein the first long side plate 2, the first short side plate 3, the second long side plate 4 and the second short side plate 5 are sequentially connected and enclose the bottom plate 1 to form a rectangular casting cavity;

[0026] The bottom plate 1, the first long side plate 2, the first short side plate 3, the second long side plate 4, and the second short side plate 5 are all 12 mm thick spliced wood boards formed by bonding a plurality of horizontally grained wood strips 12 and a plurality of vertically grained wood strips 13 arranged in a transversely spaced manner. The spliced wood boards are provided with resin-impregnated paper 14 fixed by a hot pressing process on the side facing the casting cavity.

[0027] A support frame with a thickness of 30 mm is provided on the side of the spliced wooden board of the first long side board 2, the first short side board 3, the second long side board 4 and the second short side board 5 facing away from the casting cavity.

[0028] The cross sections of the horizontal wood strips 12 and the vertical wood strips 13 are both trapezoidal structures of the same size;

[0029] Both ends of the first long side plate 2 and the second long side plate 4 are respectively provided with positioning grooves 6, and the first short side plate 3 and the second short side plate 4 are inserted into the positioning grooves 6 of the first long side plate 2 and the second long side plate 4;

[0030] Opposite through holes 11 are respectively provided at both ends of the first long side plate 2 and the second long side plate 4. Screws 7 are installed in the opposite through holes 11, and nuts 8 are fastened at both ends of the screws 7.

[0031] The support frame is composed of two horizontal wooden support bars 9 and a plurality of vertical wooden support bars 10 that cross each other vertically; the vertically crossed horizontal support bars 9 and vertical support bars 10 are built into a plurality of grid structures.

[0032] In Example 1, the steps for making the spliced wood board and the resin-impregnated paper on one side thereof are as follows:

[0033] (1) Classify the solid wood strips according to the direction of the wood grain, and cut the horizontal and vertical wood strips into trapezoidal structures of the same size;

[0034] (2) Alternately arrange the horizontal and vertical wood strips, apply white glue on the bevel of the wood strips, and glue the bevel of the wood strips together. After gluing, press the top and bottom surfaces and sides until the glue is dry.

[0035] (3) Planing the compacted spliced wood boards to smooth the upper and lower surfaces;

[0036] (4) Soak the melamine kraft paper in phenol resin adhesive and dry it. When the degree of dryness reaches 75%-85%, lay it on the surface of one side of the spliced wood board and fix it on the surface of the spliced wood board after hot pressing.

[0037] After the vertical wooden support strip 10 and the two horizontal wooden supports 9 are connected to form a support frame with a mortise and tenon structure, they are glued to the other side surface of the spliced wooden board of the first long side panel 2, the first short side panel 3, the second long side panel 4 and the second short side panel 5 by wood glue, and then fastened to the spliced wooden board with screws after being pressed and fixed.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wooden mold frame for sand casting, characterized in that: include: A bottom plate, a first long side plate, a first short side plate, a second long side plate, and a second short side plate, wherein the first long side plate, the first short side plate, the second long side plate, and the second short side plate are sequentially connected and enclose a rectangular casting cavity with the bottom plate; The bottom plate, the first long side plate, the first short side plate, the second long side plate and the second short side plate are all made of a plurality of horizontal wood strips and a plurality of vertical wood strips arranged and bonded in a transverse manner, and the side of the spliced wood strips facing the casting cavity is made of resin-impregnated paper fixed by a hot pressing process; A support frame is provided on the side of the spliced wood board of the first long side board, the first short side board, the second long side board and the second short side board facing away from the casting cavity.

2. The wooden mold frame for sand casting according to claim 1, characterized in that: The cross sections of the horizontal wood strips and the vertical wood strips are both trapezoidal structures of the same size.

3. The wooden mold frame for sand casting according to claim 1 or 2, characterized in that: Positioning grooves are respectively provided at both ends of the first long side plate and the second long side plate, and the first short side plate and the second short side plate are inserted into the positioning grooves of the first long side plate and the second long side plate.

4. The wooden mold frame for sand casting according to claim 1 or 2, characterized in that: Opposite through holes are respectively provided at both ends of the first long side plate and the second long side plate. Screws are installed in the opposite through holes, and nuts are fastened at both ends of the screws.

5. The wooden mold frame for sand casting according to claim 1 or 2, characterized in that: The support frame is composed of two horizontal wooden support bars and a plurality of vertical wooden support bars that cross each other vertically; the vertically crossed horizontal support bars and vertical support bars are built into a plurality of grid structures.

6. The wooden mold frame for sand casting according to claim 5, characterized in that: The vertical wooden support strip is connected to the two horizontal wooden support strips through mortise and tenon joints.

7. The wooden mold frame for sand casting according to claim 1 or 2, characterized in that: The thickness of the support frame is 3 to 8 times the thickness of the spliced wooden boards.

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