A type of one-cavity, multi-mold, split-type lost foam mold

Abstract

This utility model discloses a multi-cavity, split-type lost foam mold, comprising a mold box with an open top and a bottom plate. The open top is used to cooperate with a matching pressing mold to produce lost foam. A longitudinal partition is arranged in the middle of the mold box, dividing the interior of the mold box into left and right cavities. A transverse partition is also arranged in the middle of each of the left and right cavities, dividing the corresponding cavity into two equal-sized inner cavities. Each inner cavity contains a transversely arranged semi-cylindrical mold sleeve. The cylindrical wall of the semi-cylindrical mold sleeve has several foam extrusion holes. A feed pipe is provided on the side wall of the mold box for each semi-cylindrical mold sleeve. This utility model, by designing four semi-cylindrical mold sleeves in one mold box, can simultaneously produce four semi-cylindrical lost foams, greatly improving the production efficiency of lost foam and ensuring the smooth progress of subsequent production.

Description

Technical Field

[0001] This utility model relates to the technical field of lost foam casting equipment, and in particular to a single-cavity, multi-mold, split-type lost foam casting mold. Background Technology

[0002] In the production of large cast iron pipe fittings, due to their large size, lost foam casting is generally used. A crucial step in this process is to quickly and efficiently produce the lost foam pattern to enable mass production. Similarly, because the cast iron pipes have large diameters, to ensure easy demolding and ease of production, split-type lost foam patterns are often used. This involves dividing a complete lost foam pattern into two semi-cylindrical patterns, which are then glued together to form a single unit. However, since these semi-cylindrical patterns are used in large quantities, a multi-cavity split-type lost foam mold needs to be designed to improve production efficiency. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned situation by providing a single-cavity, multi-mold, split-type lost foam mold. This lost foam mold adopts a new design structure and can produce four semi-cylindrical lost foam pieces at once, which is highly efficient and ensures production quality.

[0004] The specific solution of this utility model is as follows: a multi-cavity split-type lost foam mold, comprising a mold box with an open top and a bottom plate. The open top is used to cooperate with a matching pressing mold to produce lost foam. A longitudinal partition is arranged in the middle of the mold box, dividing the interior of the mold box into left and right cavities. A transverse partition is also arranged in the middle of the left and right cavities, and each transverse partition divides the corresponding cavity into two equal-sized inner cavities. Each inner cavity is provided with a transversely arranged semi-cylindrical mold sleeve. The cylindrical wall of the semi-cylindrical mold sleeve is provided with several foam extrusion holes. A feed pipe is provided on the side wall of the mold box for each semi-cylindrical mold sleeve, and the feed pipe introduces the pre-foamed and cured material into the semi-cylindrical mold sleeve.

[0005] Furthermore, each of the foam extrusion holes described in this invention is composed of 4 to 8 small holes densely arranged.

[0006] Furthermore, the cross-section of the transverse partition in this utility model is an isosceles triangle shape that is narrower at the top and wider at the bottom, and the width of the bottom base is 0.5 to 0.8 cm.

[0007] Furthermore, in this utility model, the longitudinal partition plate is longitudinally connected to the front and rear side plates of the mold box from the inside of the mold box. A V-shaped groove is provided at the center of the upper part of the longitudinal partition plate, and a V-shaped groove is provided on each side of the longitudinal partition plate near the two sides.

[0008] Furthermore, the outer end of the feed tube in this invention adopts a quick-connect coupling structure.

[0009] Furthermore, the mold box described in this utility model is provided with a sealing groove on the upper open surface, which is used to cooperate with the matching pressure mold to make lost foam.

[0010] This utility model has the following beneficial effects:

[0011] 1. This utility model designs four semi-cylindrical mold sleeves in a mold box, which can simultaneously form and produce four semi-cylindrical lost molds at one time, greatly improving the production efficiency of lost molds and providing a guarantee for the smooth progress of subsequent production.

[0012] 2. In this utility model, the mold box is divided into four inner cavities. The horizontal partition further divides the left and right cavities into front and rear cavities. The horizontal partition adopts the form of a pointed partition with an isosceles triangle cross section. When the pre-foamed and cured foam material is injected, the lost foam in the two inner cavities can be naturally separated by the cooperation of the upper mold, without the need for later cutting, which further improves production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure from the main view direction of this utility model;

[0014] Figure 2 This is a top view structural diagram of this utility model;

[0015] Figure 3 This is a side view of the structure of this utility model after removing the outer mold box;

[0016] Figure 4 This is a schematic diagram of the foam extrusion hole in this utility model.

[0017] In the diagram: 1—Mold box, 2—Feed pipe, 3—Semi-cylindrical mold sleeve, 4—Foam extrusion hole, 5—Sealing groove, 6—Longitudinal partition, 7—Transverse partition, 8—V-groove II, 9—V-groove I. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] See Figures 1-4 This utility model is a multi-cavity, split-type lost foam casting mold, comprising a mold box 1 with an open top and a bottom plate. Furthermore, the upper open surface of the mold box has a sealing groove 5 for use with a matching pressing mold to create lost foam. The pressing mold is not shown here. A longitudinal partition 6 is longitudinally arranged in the middle of the mold box, dividing the interior into left and right cavities. Transverse partitions 7 are respectively arranged in the middle of the left and right cavities. Furthermore, the cross-section of the transverse partitions in this utility model is narrower at the top and narrower at the bottom. The mold has a wide isosceles triangle shape with a bottom base width of 0.5-0.8 cm. Each horizontal partition divides the corresponding cavity into two equal-sized inner cavities. Each inner cavity is provided with a horizontally arranged semi-cylindrical mold sleeve 3. The cylindrical wall of the semi-cylindrical mold sleeve is provided with several foam extrusion holes 4. Furthermore, in this invention, each foam extrusion hole is composed of 4-8 small holes densely arranged. A feed pipe 2 is provided on the side wall of the mold box for each semi-cylindrical mold sleeve. The feed pipe introduces the pre-foamed and cured material into the semi-cylindrical mold sleeve. Furthermore, in this invention, the outer end of the feed pipe adopts a quick-connect structure.

[0021] Furthermore, in this utility model, the longitudinal partition plate is longitudinally connected to the front and rear side plates of the mold box from the inside of the mold box. A V-shaped groove 9 is provided at the center of the upper part of the longitudinal partition plate, and a V-shaped groove 8 is provided on each side of the longitudinal partition plate near the two sides.

[0022] This invention, as a mold for making lost foam casting, requires the cooperation of an upper pressure mold during actual use. The shape of the pressure mold is consistent with the shape of the lower mold box and the semi-cylindrical mold sleeve therein to form a fit. However, a gap is designed between the pressure mold and the semi-cylindrical mold sleeve to generate the required lost foam. In use, the upper pressure mold is first pressed and covered with the mold box of this invention, and kept in a tight and sealed state. The relevant structures on the pressure mold are attached to the horizontal and vertical partitions in the mold box of this invention to form a separation of the four inner cavities. After the cover is closed, pre-foamed and cured foam material is quickly injected into the semi-cylindrical mold sleeve inside the mold box through the feed pipe using an injection machine. The material passes through each foam extrusion hole and forms half of the required cylindrical lost foam shape in the space above the semi-cylindrical mold sleeve. After cooling, it is fully formed.

[0023] This invention achieves a mold with four cavities, and each of the four cavities is formed separately in one molding process, thus achieving the goal of efficient mold making.

[0024] This invention designs four semi-cylindrical mold sleeves in a mold box, which can simultaneously form and produce four semi-cylindrical lost molds in one go, greatly improving the production efficiency of lost molds and ensuring the smooth progress of subsequent production.

[0025] In this invention, the mold box is divided into four inner cavities. The horizontal partition further divides the left and right cavities into front and rear cavities. The horizontal partition adopts the form of a pointed partition with an isosceles triangle cross section. When the pre-foamed and cured foam material is injected, the lost foam in the two inner cavities can be naturally separated by the upper mold through the cooperation of the mold, without the need for later cutting, which further improves production efficiency.

Claims

1. A multi-cavity, split-type lost foam casting mold, comprising a mold box, an open top, and a bottom plate, the open top being used to cooperate with a matching pressing mold to produce lost foam, characterized in that: A longitudinal partition is arranged in the middle of the mold box, dividing the interior of the mold box into left and right cavities. A transverse partition is also arranged in the middle of each of the left and right cavities, dividing the corresponding cavity into two equal-sized inner cavities. Each inner cavity is provided with a transversely arranged semi-cylindrical mold sleeve. Several foam extrusion holes are opened on the cylindrical wall of the semi-cylindrical mold sleeve. A feed pipe is provided on the side wall of the mold box for each semi-cylindrical mold sleeve, and the feed pipe introduces the pre-foamed and cured material into the semi-cylindrical mold sleeve.

2. The one-cavity multi-mold split-type lost foam casting mold according to claim 1, characterized in that: Each of the foam extrusion holes is composed of 4 to 8 small holes arranged in a dense pattern.

3. The one-cavity multi-mold split-type lost foam casting mold according to claim 1, characterized in that: The cross-section of each of the transverse partitions is an isosceles triangle shape that is narrower at the top and wider at the bottom, with the width of the bottom base being 0.5 to 0.8 cm.

4. The one-cavity multi-mold split-type lost foam casting mold according to claim 1, characterized in that: The longitudinal partition is longitudinally connected to the front and rear side plates of the mold box from the inside of the mold box. A V-shaped groove is provided at the center of the top of the longitudinal partition, and a V-shaped groove is provided on each side of the longitudinal partition.

5. The one-cavity multi-mold split-type lost foam casting mold according to claim 1, characterized in that: The outer end of the feed pipe adopts a quick-connect structure.

6. The multi-cavity, split-type lost foam casting mold according to claim 1, characterized in that: The upper open surface of the mold box is also provided with a sealing groove, which is used to cooperate with the matching pressure mold to make lost foam.

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