Upper die structure of pipe bending die

Abstract

The utility model relates to an upper die structure of a pipe bending die, which comprises an arc-shaped wood die main body, the cross section of the wood die main body is in a semicircular ring shape, a plurality of reinforcing rib plates which are distributed at intervals along the axis direction of the wood die main body are arranged on the outer circumferential surface of the wood die main body, and the reinforcing rib plates comprise foam rib plates. Lateral wood plates are fixed to the two side faces, in the axis direction of the wood pattern body, of the foam rib plate respectively, and the foam rib plate and the lateral wood plates on the two sides form an interlayer structure. The arc-shaped wood pattern is simple and reasonable in structural design, the reinforcing rib plate on the circumferential surface of the arc-shaped wood pattern main body is formed by combining the foam rib plate and the lateral wood plate, the foam rib plate serves as a main body structure of the reinforcing rib plate, the lateral wood plate plays a role in improving the structural strength of the foam rib plate, during drawing, due to the fact that the thickness of the lateral wood plate is small, drawing is convenient, and production efficiency is improved. And the foam rib plate can be directly removed by crushing, so that the size deviation is not easy to occur in the whole drawing process.

Description

Technical Field

[0001] The utility model relates to an upper die structure of a pipe bending die. Background Art

[0002] Sand casting refers to a casting method that produces castings in sand molds. Since the molding materials used in sand casting are cheap and easy to obtain, the mold is simple to manufacture, and it can adapt to single-piece production, batch production, and mass production of castings, it has long been a basic process in casting production.

[0003] Some large-diameter elbows are typically produced using sand casting. To enhance the structural strength of these elbows, a vertical reinforcing rib is often installed on the outer circumference of the upper end. When sand casting these elbows, a sand mold (either a wooden or foam mold) is typically prepared, identical to the shape of the product. This mold is then removed from the sand mold to form the casting cavity. However, existing sand molds for these types of elbows consist of an upper mold and a lower mold. The upper mold has a vertical reinforcing rib installed on its outer circumference. These ribs are made of either foam or wood. Foam-based reinforcing ribs offer insufficient structural strength. While wood-based reinforcing ribs offer high structural strength, their relatively thin thickness and height make them difficult to remove from the sand mold, leading to dimensional deviations. Therefore, improvements to the upper mold structure of sand molds for elbows are necessary to overcome these issues. Utility Model Content

[0004] The present invention aims to improve the problems existing in the prior art. Specifically, the present invention aims to provide an upper mold structure for a pipe bending mold.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an upper mold structure of a bending pipe mold, including an arc-shaped wooden mold body, the cross-section of the wooden mold body is semicircular, and the outer circumferential surface of the wooden mold body is provided with a plurality of reinforcing ribs distributed at intervals along the axial direction of the wooden mold body, the reinforcing ribs include foam ribs, and the foam ribs are respectively fixed with lateral wooden boards on both sides along the axial direction of the wooden mold body, and the foam ribs and the lateral wooden boards on both sides form a sandwich structure.

[0006] Furthermore, a foam fillet is provided between one end of the reinforcing rib plate close to the wooden mold body and the outer circumferential surface of the wooden mold body.

[0007] Furthermore, a semicircular recess is provided at one end of the reinforcing rib plate close to the wooden mold body for matching with the outer circumferential surface of the wooden mold body, and the bottom surface of the reinforcing rib plate is flush with the bottom surface of the wooden mold body.

[0008] Furthermore, a foam reinforcement block is fixed on the top of the outer circumferential surface of the wooden mold body between two adjacent reinforcing ribs, and a foam fillet is also provided between the foam reinforcement block and the reinforcing ribs.

[0009] Furthermore, a wooden formwork top plate is fixed between the tops of the plurality of reinforcing rib plates.

[0010] Compared with the prior art, the present invention has the following effects: the structural design of the present invention is simple and reasonable, the reinforcing ribs on the circumferential surface of the arc-shaped wooden mold body are composed of foam ribs and lateral wooden boards, the foam ribs serve as the main structure of the reinforcing ribs, and the lateral wooden boards serve to improve the structural strength of the foam ribs. When demolding, the lateral wooden boards are easy to demold due to their small thickness, and the foam ribs can be directly removed by crushing, and the entire demolding process is not prone to dimensional deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the top view of the structure of an embodiment of the utility model (omitting the wooden formwork top plate);

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the reinforcing rib plate in the embodiment of the present utility model.

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of an embodiment of the present utility model;

[0014] Figure 4 It is a schematic diagram of the main structure of an embodiment of the present utility model.

[0015] In the picture:

[0016] 1-Wooden formwork body; 2-Reinforcement ribs; 3-Foam ribs; 4-Lateral wooden board; 5-Semicircular recess; 6-Foam fillet; 7-Foam reinforcement block; 8-Wooden formwork top plate. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0019] like Figures 1 to 4As shown, the utility model provides an upper mold structure of a pipe bending mold, including a wooden mold body 1 with an overall arc shape, the cross-section of the wooden mold body 1 is semicircular, and the outer circumferential surface of the wooden mold body 1 is provided with a plurality of reinforcing ribs 2, and the plurality of reinforcing ribs 2 are spaced apart along the axial direction of the wooden mold body 1, and each reinforcing rib 2 is perpendicular to the wooden mold body 1, that is, the reinforcing ribs extend radially along the wooden mold body. The specific improvement is that the reinforcing ribs 2 include foam ribs 3, and the foam ribs 3 are respectively fixed with lateral wooden boards 4 on both sides along the axial direction of the wooden mold body 1. The lateral wooden boards are in the form of thin plates, and the foam ribs 3 and the lateral wooden boards 4 on both sides form a sandwich structure. The foam ribs serve as the main structure of the reinforcing ribs, and the lateral wooden boards serve to improve the structural strength of the foam ribs. The reinforcing ribs on the circumferential surface of the arc-shaped wooden mold body are composed of foam ribs and lateral wooden boards. The foam ribs serve as the main structure of the reinforcing ribs, while the lateral wooden boards serve to improve the structural strength of the foam ribs. When demolding, the lateral wooden boards are easy to demold due to their small thickness, and the foam ribs can be removed directly by crushing. The entire demolding process is not prone to dimensional deviation.

[0020] In this embodiment, in order to improve the matching effect, the reinforcing rib plate 2 is provided with a semicircular recess 5 at one end close to the wooden mold body 1 for matching with the outer circumferential surface of the wooden mold body.

[0021] In this embodiment, a foam fillet 6 is provided between the end of the reinforcing rib plate 1 closest to the wooden formwork body 2 (i.e., the end closest to the semicircular recess) and the outer circumference of the wooden formwork body 1. The foam fillet is provided around the outer circumference of the wooden formwork body. Furthermore, the reinforcing rib plates at both ends of the wooden formwork body have foam fillets on only one side, while the remaining reinforcing rib plates have foam fillets on both sides.

[0022] In this embodiment, the bottom surface of the reinforcing rib plate 2 is flush with the bottom surface of the wooden formwork body 1 .

[0023] In this embodiment, foam reinforcement blocks 7 are fixed between two adjacent reinforcing rib plates 2 on the top of the outer circumference of the wooden mold body 1 to improve the structural strength.

[0024] In this embodiment, a foam fillet 6 is also provided between the foam reinforcement block 7 and the reinforcing rib plate 2 .

[0025] In this embodiment, a horizontally arranged wooden formwork top plate 8 is fixed between the tops of the plurality of reinforcing rib plates 2 .

[0026] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0027] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the above-mentioned utility model to express positional relationships or shapes include states or shapes that are approximate, similar or close thereto.

[0028] Any component provided by the present invention can be assembled from multiple separate components, or can be a separate component manufactured by an integral forming process.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.

Claims

1. An upper mold structure for a pipe bending mold, comprising an arc-shaped wooden mold body, the cross-section of the wooden mold body being semicircular, the outer circumferential surface of the wooden mold body being provided with a plurality of reinforcing ribs spaced apart along the axial direction of the wooden mold body, characterized in that: The reinforcing ribs include foam ribs, and lateral wooden boards are fixed to the two side surfaces of the foam ribs along the axis direction of the wooden formwork body respectively. The foam ribs and the lateral wooden boards on both sides form a sandwich structure.

2. The upper mold structure of a pipe bending mold according to claim 1, characterized in that: A foam fillet is provided between one end of the reinforcing rib plate close to the wooden mold body and the outer circumferential surface of the wooden mold body.

3. The upper mold structure of a pipe bending mold according to claim 2, characterized in that: The reinforcing rib plate is provided with a semicircular recessed portion adapted to the outer circumferential surface of the wooden mold body at one end close to the wooden mold body, and the bottom surface of the reinforcing rib plate is flush with the bottom surface of the wooden mold body.

4. The upper mold structure of a pipe bending mold according to claim 2, characterized in that: A foam reinforcement block is fixed on the top of the outer circumferential surface of the wooden mold body between two adjacent reinforcement ribs, and a foam fillet is also provided between the foam reinforcement block and the reinforcement ribs.

5. The upper mold structure of a pipe bending mold according to claim 1, characterized in that: A wooden formwork top plate is fixed between the tops of the plurality of reinforcing rib plates.

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