Cylinder type casting sand core molding device

Abstract

The utility model discloses a barrel type casting sand core molding device which is characterized by comprising two molding boxes which are symmetrically arranged and are tightly attached to each other; the modeling box comprises a plurality of connecting plates, semicircular grooves are formed in the connecting plates, and a plurality of facing plates are arranged in the semicircular grooves; the two sides of the ends, provided with the semicircular grooves, of the connecting plates are fixedly connected through sealing strip plates. The barrel type casting sand core molding device is high in sand core size precision and low in repair rate, the shrinkage and expansion deformation degree of a core box is low after the sand core is stored or used for casting sand, and the barrel type casting sand core molding device can also be applied to structural casting pattern manufacturing.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting molding equipment and relates to a sand core molding device for cylindrical castings. Background Art

[0002] Casting wooden models have the advantages of light weight, short production cycle, easy processing and molding, etc., which makes them one of the commonly used model materials in casting production. The forming of cylindrical or trough-shaped castings requires a sand mold cavity that meets the process requirements. The pattern is a process equipment for forming the outer cavity of the castings, and the core box is a process equipment for forming the inner cavity of the castings and making the core sand into a core, which can be made of wood, plastic, metal or other materials. When designing the core box, the core box material and its structural form are determined according to factors such as the characteristics of the core, production batch and production conditions. Circular cast steel parts are often mainly hollow and thin-walled to meet the process requirements. In the sand casting molding process, the sand core molding process is often used to meet the hollow process requirements of cast steel products. Therefore, in the production of traditional model core boxes, a process combining webs and strips is used. The existing wooden cylindrical core boxes in the prior art, because most of this manufacturing process needs to be completed on equipment, especially when processing the strips, the width and the slopes on both sides are processed on the equipment, and the potential safety hazards are at a high level, which can easily cause finger injuries to the staff. After storage or after being used in sand casting, the wooden strips will shrink, expand and deform. The gaps between the wooden strips increase, the dimensions in the diameter direction of the parting surface increase, an ellipse is formed in the coaxial direction, it is difficult to repair, the sand casting accuracy is reduced, and the repair rate is high.

[0003] In summary, the prior art has the problem that the casting sand core molding device is prone to deformation after use. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sand core molding device for cylindrical castings, which solves the problem that the casting sand core molding device in the prior art is prone to deformation after use.

[0005] The technical solution adopted by the utility model is that the sand core molding device for cylindrical castings includes two symmetrically arranged molding boxes that are closely fitted; each molding box includes a plurality of connecting plates, semi-circular grooves are formed on the connecting plates, and a plurality of facing plates are arranged in the semi-circular grooves; both sides of one end of the plurality of connecting plates where the semi-circular grooves are formed are fixedly connected through sealing plates respectively.

[0006] The characteristics of the utility model further lie in that:

[0007] The plurality of connecting plates are arranged in parallel, and one side of the connecting plates where the semi-circular grooves are formed is fixedly connected to the facing plates.

[0008] The centers of the plurality of semi-circular grooves are located on the same axis.

[0009] The plurality of connecting plates are fixedly connected through a plurality of fixing strips, and the side of the connecting plates far from the semi-circular grooves is fixedly connected to the fixing strips.

[0010] A plurality of fixing bars are arranged in parallel, and two ends of the fixing bars are fixedly connected to a support plate on one side away from the connecting plate.

[0011] The surface of the sealing strip plate is parallel to the extending direction of the fixing strip; the surface of the connecting plate is perpendicular to the surface of the sealing strip plate.

[0012] The cross section of the veneer panel is semicircular, and the veneer panels are fitted together and fixed together by colloid.

[0013] The thickness of the veneer shall not be less than 3mm.

[0014] The surface roughness of the sealing plate, facing plate and connecting plate is Ra12.5μm-Ra25μm.

[0015] The sealing strips on the two modeling boxes fit tightly together, and the side walls of the facing panels on the two modeling boxes fit tightly together.

[0016] The beneficial effects of the utility model are: the utility model greatly reduces the proportion of equipment used, reduces the possibility of dangerous accidents, ensures the safety of workers, and avoids the safety hazard of workers' finger injuries; the shrinkage and expansion deformation of the facing plate are very small, the sand core size accuracy is high, the rework rate is low, and the core box has a low degree of shrinkage and expansion deformation after storage or sand casting, and can also be used for the production of structural casting patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a sand core molding device for cylindrical castings of the utility model.

[0018] In the figure, 1. Modeling box; 2. Sealing plate; 3. Decorative plate; 4. Semicircular groove; 5. Connecting plate; 6. Fixing strip; 7. Support plate. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] The sand core molding device for cylindrical castings comprises two molding boxes 1 arranged symmetrically, and the two molding boxes 1 are tightly fitted together; Figure 1 As shown, the shaping box 1 includes a plurality of connecting plates 5, each of which has a semicircular groove 4, in which a plurality of decorative plates 3 are arranged; the semicircular groove 4 is provided on one end of the plurality of connecting plates 5, and both sides thereof are fixedly connected by sealing strips 2.

[0021] Several connecting plates 5 are arranged in parallel, and one side of the connecting plate 5 with a semicircular groove 4 is fixed to the facing plate 3. The centers of the several semicircular grooves 4 are located on the same axis. Several connecting plates 5 are fixed by several fixing strips 6, and the side of the connecting plate 5 away from the semicircular groove 4 is fixed to the fixing strip 6. Several fixing strips 6 are arranged in parallel, and both ends of the fixing strips 6 are fixed to a support plate 7 on the side away from the connecting plate 5. The surface of the sealing plate 2 is parallel to the extension direction of the fixing strip 6; the surface of the connecting plate 5 is perpendicular to the surface of the sealing plate 2. The cross-section of the facing plate 3 is semicircular, and several facing plates 3 are fitted together and fixed to each other by colloid.

[0022] The thickness of the facing plate 3 is not less than 3mm. The surface roughness of the sealing plate 2, facing plate 3, and connecting plate 5 is Ra12.5μm-Ra25μm. The sealing plates 2 on the two molding boxes 1 fit tightly together, and the side walls of the facing plates 3 on the two molding boxes 1 fit tightly together.

[0023] The manufacturing process of the sand core molding device for cylindrical castings of the utility model is as follows:

[0024] First, mark the position of the semicircular groove 4 on the connecting plate 5, then remove the excess material in the semicircular groove 4 by rough sawing, and then use a milling machine to fine-tune the semicircular groove 4 on the connecting plate 5, and then fix the connecting plate 5 with the fixing strip 6 and the sealing plate 2, and then glue the curved veneer 3 in the semicircular groove 4 with fixing glue, and then cut and remove the excess material on the veneer 3 so that the veneer 3 is completely fitted with the semicircular groove 4 and does not exceed the range of the semicircular groove 4, and finally fix the support plate 7 on the fixing strip 6.

[0025] The existing technology has a high maintenance rate. After being sanded, the wooden strips shrink, expand and deform. The gaps between the wooden strips increase, the diameter of the parting surface increases, and the coaxiality direction forms an ellipse. Maintenance is difficult, the sanding accuracy is reduced, and the rework rate is high. The decorative board 3 used in the present invention expands very little, and there will be no problem of larger gaps between the wooden strips.

[0026] Example 1

[0027] This embodiment provides a sand core molding device for cylindrical castings. The device comprises two symmetrically arranged molding boxes 1, which fit tightly together. The molding boxes 1 include four connecting plates 5, each with a semicircular groove 4 formed therein. Two facing panels 3 are positioned within the semicircular grooves 4. The four connecting plates 5 are secured to each other on both sides of one end with the semicircular groove 4 by sealing strips 2. The four connecting plates 5 are arranged in parallel, and the side with the semicircular groove 4 formed therein is secured to the facing panel 3. The centers of the four semicircular grooves 4 are coaxial.

[0028] Example 2

[0029] This embodiment proposes a sand core molding device for cylindrical castings, which includes two symmetrically arranged molding boxes 1 that are closely fitted together; the molding box 1 includes three connecting plates 5, and semi-circular grooves 4 are formed on the connecting plates 5, and three layers of facing plates 3 are arranged in the semi-circular grooves 4; both sides of one end of the three connecting plates 5 where the semi-circular grooves 4 are formed are fixedly connected through sealing plates 2 respectively. The three connecting plates 5 are arranged in parallel, and one side of the connecting plate 5 where the semi-circular groove 4 is formed is fixedly connected to the facing plate 3. The centers of the three semi-circular grooves 4 are located on the same axis. The three connecting plates 5 are fixedly connected through two fixing bars 6, and one side of the connecting plate 5 away from the semi-circular groove 4 is fixedly connected to the fixing bar 6. The two fixing bars 6 are arranged in parallel, and support plates 7 are fixedly connected to both ends of the fixing bar 6 away from the connecting plate 5 respectively. The surface of the sealing plate 2 is parallel to the extending direction of the fixing bar 6; the surface of the connecting plate 5 is perpendicular to the surface of the sealing plate 2.

[0030] Embodiment 3

[0031] This embodiment proposes a sand core molding device for cylindrical castings, which includes two symmetrically arranged molding boxes 1 that are closely fitted together; the molding box 1 includes six connecting plates 5, and semi-circular grooves 4 are formed on the connecting plates 5, and two layers of facing plates 3 are arranged in the semi-circular grooves 4; both sides of one end of the six connecting plates 5 where the semi-circular grooves 4 are formed are fixedly connected through sealing plates 2 respectively. The six connecting plates 5 are arranged in parallel, and one side of the connecting plate 5 where the semi-circular groove 4 is formed is fixedly connected to the facing plate 3. The centers of the six semi-circular grooves 4 are located on the same axis. The six connecting plates 5 are fixedly connected through three fixing bars 6, and one side of the connecting plate 5 away from the semi-circular groove 4 is fixedly connected to the fixing bar 6. The three fixing bars 6 are arranged in parallel, and support plates 7 are fixedly connected to both ends of the fixing bar 6 away from the connecting plate 5 respectively. The surface of the sealing plate 2 is parallel to the extending direction of the fixing bar 6; the surface of the connecting plate 5 is perpendicular to the surface of the sealing plate 2. The cross-section of the facing plate 3 is semi-circular, and the two layers of facing plates 3 are closely arranged, and the facing plates 3 are fixedly connected through a colloid. The thickness of the facing plate 3 is not less than 3 mm. The surface roughness of the sealing plate 2, the facing plate 3, and the connecting plate 5 is Ra12.5 μm.

[0032] Embodiment 4

[0033] This embodiment proposes a sand core molding device for cylindrical castings, which includes two symmetrically arranged molding boxes 1 that are closely fitted together; as Figure 1As shown in the figure, the shaping box 1 includes five connecting plates 5. Semi-circular grooves 4 are formed on the connecting plates 5, and three layers of facing plates 3 are arranged in the semi-circular grooves 4. Both sides of one end of the five connecting plates 5 where the semi-circular grooves 4 are formed are fixedly connected by sealing plates 2 respectively. The five connecting plates 5 are arranged in parallel, and one side of the connecting plates 5 where the semi-circular grooves 4 are formed is fixedly connected to the facing plates 3. The centers of the five semi-circular grooves 4 are located on the same axis. The five connecting plates 5 are fixedly connected by two fixing bars 6, and one side of the connecting plates 5 far from the semi-circular grooves 4 is fixedly connected to the fixing bars 6. The two fixing bars 6 are arranged in parallel, and support plates 7 are fixedly connected to both ends of the fixing bars 6 far from the connecting plates 5 respectively. The plane of the sealing plate 2 is parallel to the extending direction of the fixing bar 6; the plane of the connecting plate 5 is perpendicular to the plane of the sealing plate 2. The cross-section of the facing plate 3 is semi-circular, and the three layers of facing plates 3 are arranged in a fitting manner, and the facing plates 3 are fixedly connected by glue. The thickness of the facing plate 3 is not less than 3 mm. The surface roughness of the sealing plate 2, the facing plate 3, and the connecting plate 5 is Ra25 μm. The sealing plates 2 on the two shaping boxes 1 are closely fitted, and the side walls of the facing plates 3 on the two shaping boxes 1 are closely fitted.

Claims

1. Sand core molding device for cylindrical castings, characterized in that: The invention comprises two symmetrically arranged modeling boxes (1), wherein the two modeling boxes (1) are tightly fitted together; the modeling boxes (1) comprise a plurality of connecting plates (5), wherein a semicircular groove (4) is formed on the connecting plates (5), and a plurality of decorative plates (3) are arranged in the semicircular groove (4); and the two sides of one end of the plurality of connecting plates (5) with the semicircular groove (4) are fixedly connected by sealing strips (2).

2. The cylindrical casting sand core molding device according to claim 1, characterized in that: A plurality of connecting plates (5) are arranged in parallel, and one side of the connecting plate (5) is provided with a semicircular groove (4) and is fixedly connected to the facing plate (3).

3. The cylindrical casting sand core molding device according to claim 2, characterized in that: The centers of the several semicircular grooves (4) are located on the same axis.

4. The cylindrical casting sand core molding device according to claim 3, characterized in that: The plurality of connecting plates (5) are fixedly connected via a plurality of fixing strips (6), and the side of the connecting plate (5) away from the semicircular groove (4) is fixedly connected to the fixing strip (6).

5. The cylindrical casting sand core molding device according to claim 4, characterized in that: The plurality of fixing bars (6) are arranged in parallel, and both ends of the fixing bars (6) are fixedly connected to support plates (7) on one side away from the connecting plate (5).

6. The cylindrical casting sand core molding device according to claim 5, characterized in that: The surface of the sealing plate (2) is parallel to the extension direction of the fixing strip (6); the surface of the connecting plate (5) is perpendicular to the surface of the sealing plate (2).

7. The cylindrical casting sand core molding device according to claim 6, characterized in that: The cross section of the veneer plate (3) is semicircular, and a plurality of the veneer plates (3) are arranged to fit together, and the plurality of the veneer plates (3) are fixed together by colloid.

8. The cylindrical casting sand core molding device according to claim 7, characterized in that: The thickness of the veneer plate (3) is not less than 3 mm.

9. The cylindrical casting sand core molding device according to claim 8, characterized in that: The surface roughness of the sealing plate (2), the facing plate (3), and the connecting plate (5) is Ra12.5 μm-Ra25 μm.

10. The cylindrical casting sand core molding device according to claim 9, characterized in that: The sealing strips (2) on the two molding boxes (1) are tightly fitted, and the side walls of the decorative panels (3) on the two molding boxes (1) are tightly fitted.

Images