Folding box inner hinge upright sand casting mold

Abstract

The utility model discloses a folding box hinge vertical casting sand mold die, including first template and second template, the utility model discloses a key lies in: the first parting surface convexity of first template forms and has first male die, first riser and first sprue, and first sprue end and first pouring end have first sprue, and first sprue gradually increases from first sprue end to first pouring end, the second parting surface convexity of second template forms and has second male die, second riser and second sprue, and second sprue has second sprue end corresponding with first sprue end and second pouring end located below second sprue end and the second male die link, and second pouring end corresponds with first pouring end, and second sprue gradually increases from second sprue end to second pouring end. Through this structure design, can improve the effect of feeding, prevent the casting and produce the situation of shrinkage porosity, and can reduce the quantity of feeding riser.

Description

Technical Field

[0001] This utility model relates to the field of container parts casting technology, specifically to a vertical sand casting mold for the inner hinge of a folding box. Background Technology

[0002] The inner hinge of the folding box is formed by sand casting, specifically a planar casting sand mold. The existing sand mold includes an upper mold and a corresponding lower mold. The upper mold forms the upper sand mold and has a concave mold on it. The concave mold forms the core of the upper sand mold. The upper mold also has an upper riser connected to the concave mold on its outer side. The lower mold forms the lower sand mold and has a lower punch on it. The lower punch forms the cavity of the lower sand mold. The cavity and core form the mold cavity for planar casting of the inner hinge. However, when the inner hinge (casting) is cast using the above-mentioned sand mold, the casting is prone to shrinkage porosity and shrinkage cavities, resulting in a high defect rate. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a folding box hinged vertical casting sand mold that improves the feeding effect and prevents shrinkage porosity and shrinkage holes in castings by setting a first sprue that gradually increases from the first gate end to the first inlet end and a second sprue that gradually increases from the second gate end to the second inlet end.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] The vertical sand casting mold for the hinge inside the folding box includes a first template and a second template corresponding to the first template;

[0006] The first parting surface on the front side of the first template protrudes forward to form a first punch, a first riser and a first sprue located on one side of the first punch. The first riser is connected to the first punch. The first sprue has a first gate end and a first inlet end located below the first gate end and connected to the first punch. The first sprue gradually increases in size from the first gate end to the first inlet end and its axis is parallel to the first parting surface.

[0007] The second parting surface on the front side of the second template protrudes forward to form a second punch corresponding to the first punch, a second riser corresponding to the first riser, and a second sprue corresponding to the first sprue. The second riser is connected to the second punch. The second sprue has a second gate end corresponding to the first gate end and a second inlet end located below the second gate end and connected to the second punch. The second inlet end corresponds to the first inlet end. The second sprue gradually increases in size from the second gate end to the second inlet end, and its axis is parallel to the second parting surface.

[0008] Furthermore, the first gate end and the second gate end each form a sprue section, the two sprue sections are corresponding and gradually shrink from the top surface to the bottom surface, the first injection end and the second injection end each form an extension section extending in the vertical direction, the two extension sections are corresponding, and the extension section on the first template is connected to the first punch, and the extension section on the second template is connected to the second punch.

[0009] Furthermore, the cross-sections of the first and second sprues are arc-shaped.

[0010] Furthermore, the first punch and the second punch are formed with arc-shaped portions, the first sprue is located outside the first side of the first punch away from the arc-shaped portion and is connected to the outer wall of the first side, and the second sprue is located outside the first side of the second punch away from the arc-shaped portion and is connected to the outer wall of the first side.

[0011] Furthermore, there are two first risers, which are located above the first punch and one of the first risers is close to the arcuate portion of the first punch relative to the other first riser. There are also two second risers, one of which corresponds to one of the first risers.

[0012] Furthermore, the front of the first punch is respectively recessed to form a plurality of weight-reducing grooves distributed along its length direction and protrudes forward to form two side chills, the two side chills being located below the weight-reducing grooves, and one of the side chills being located between two adjacent weight-reducing grooves.

[0013] Furthermore, the front of the first punch and the second punch are respectively recessed to form a plurality of weight-reducing grooves distributed along their length direction. The weight-reducing groove near the first sprue or the second sprue is the first weight-reducing groove. The first parting surface and the second parting surface respectively have a reference surface chill protruding forward, located below the first punch or the second punch and corresponding to the first weight-reducing groove. The two reference surface chills are corresponding and respectively connected to the first punch and the second punch.

[0014] Furthermore, the first parting surface and the second parting surface are respectively recessed from the front side of the first template and the front side of the second template, so that a first groove is formed between the first parting surface and the front side of the first template, and a second groove is formed between the second parting surface and the front side of the second template. The bottom sidewalls of the first groove and the second groove are respectively provided with a support plate extending along its length direction, and the support plate protrudes forward relative to the front side of the first template or the second template.

[0015] Furthermore, the first parting surface has a first venting plate on the side of the top surface of the first punch near the first sprue, and the first venting plate is connected to the first punch; the second parting surface has a second venting plate on the side of the top surface of the second punch near the second sprue, and the second venting plate is connected to the second punch and corresponds to the first venting plate.

[0016] This utility model discloses a vertical casting sand mold for a folding box with an internal hinge. It incorporates a first sprue and a second sprue. The first sprue gradually increases in size from the first gate end to the first inlet end, with its axis parallel to the first parting surface. The second sprue gradually increases in size from the second gate end to the second inlet end, with its axis parallel to the second parting surface. These two sprues together form a sand mold sprue, creating a gradually increasing sprue structure from top to bottom to directly feed the casting. This not only improves the feeding effect and prevents shrinkage porosity and shrinkage holes in the casting, but also reduces the number of feeding risers. This utility model's vertical casting sand mold for a folding box with an internal hinge features a simple structure and excellent feeding effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the first template of the vertical sand casting mold for the hinge inside the folding box, according to an embodiment of this utility model.

[0018] Figure 2 for Figure 1 Front view;

[0019] Figure 3 This is a three-dimensional schematic diagram of the second template of the vertical sand casting mold for the hinge inside the folding box, according to an embodiment of this utility model.

[0020] Figure 4 for Figure 3 Front view. Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0022] like Figures 1 to 4 As shown, this embodiment of the utility model provides a vertical sand casting mold for the inner hinge of a folding container, used to form a sand mold (not shown). The sand mold is used to cast the inner hinge (not shown) of the folding container, and it is a vertical sand mold. The sand mold includes a first template 1 and a second template 2 corresponding to the first template 1.

[0023] like Figure 1 , Figure 2As shown, the first template 1 is used as the front sand mold for forming the sand mold (not shown), and the first parting surface 11 on the front side of the first template 1 protrudes forward to form the first punch 12 and the first riser 13 and the first straight runner 14 located on one side of the first punch 12. The first punch 12 is used as the front cavity for forming the front sand mold, and the first punch 12 has an arc-shaped portion 5; the first riser 13 is used as the front riser for forming the front sand mold and is connected to the first punch 12 to realize the feeding of the casting. There are two first risers 13, and the two first risers 13 are located above the first punch 12, and one of the first risers 13 is closer to the arc-shaped portion 5 of the first punch 12 than the other first riser 13, that is, the first riser 13 is the top riser. The first straight runner 14 is located outside the first side of the first punch 12 away from the arc-shaped portion 5 and is connected to the outer wall of the first side; the first straight runner 14 has a first gate end 141 and a first inlet end 142 located below the first gate end 141 and connected to the first punch 12. The first straight runner 14 gradually increases in size from the first gate end 141 to the first inlet end 142 and its axis is parallel to the first parting surface 11. The first straight runner 14 is used as the front straight runner of the sand mold before molding.

[0024] like Figure 2 , Figure 3 As shown, the second template 2 is used to form the rear sand mold (not shown), and the second parting surface 21 on the front side of the second template 2 protrudes forward to form a second punch 22 corresponding to the first punch 12, a second riser 23 corresponding to the first riser 13, and a second sprue 24 corresponding to the first sprue 14. The second punch 22 is used to form the rear cavity of the rear sand mold, and the rear cavity and the front cavity form the mold cavity of the sand mold, and the second punch 22 has an arc-shaped portion 5. Accordingly, there are two second risers 23, one second riser 23 corresponding to one first riser 13, that is, the two second risers 23 are top risers. The second riser 23 is used as the rear riser of the sand mold after molding and is connected to the second punch 22 to realize the feeding of the casting. The rear riser and the front riser form the feeding riser of the sand mold. The feeding riser is connected to the mold cavity. Correspondingly, the feeding riser is the top riser of the sand mold. By setting the top riser, the casting can be gravity fed, thereby improving the feeding effect. Moreover, the volume of the top riser is smaller than that of the existing side riser, which can improve the product yield. The second sprue 24 is located on the first side of the second punch 22 away from the arc-shaped portion 5 and is connected to the outer wall of the first side. The second sprue 24 has a second gate end 241 corresponding to the first gate end 141 and a second inlet end 242 located below the second gate end 241 and connected to the second punch 22. The second inlet end 242 corresponds to the first inlet end 142. The second sprue 24 gradually increases in size from the second gate end 241 to the second inlet end 242 and its axis is parallel to the second parting surface 21.

[0025] By setting a first sprue 14 that gradually increases in size from the first gate end 141 to the first gating end 142 and a second sprue 24 that gradually increases in size from the second gate end 241 to the second gating end 242, the second sprue 24 and the first sprue 14 form a sand mold sprue, which makes the sand mold sprue form a gating structure that gradually increases from top to bottom to directly feed the casting. This not only improves the feeding effect and prevents the casting from developing shrinkage porosity and shrinkage holes, but also reduces the number of feeding risers, thereby simplifying the structure.

[0026] Specifically, the cross-sections of the first sprue 14 and the second sprue 24 are arc-shaped. In this embodiment, the cross-sections of both the first sprue 14 and the second sprue 24 are semi-circular. The second sprue 24 is used as the rear sprue of the sand mold after molding. That is, the cross-sections of the rear sprue and the front sprue are both semi-circular so that the rear sprue and the front sprue form a sand mold sprue with a circular cross-section. The sand mold sprue is connected to the mold cavity and is conical. When casting the inner hinge, the molten metal flows from the sand mold sprue into the mold cavity. The molten metal in the mold cavity flows into the feeding riser, which feeds the casting.

[0027] like Figure 1 , Figure 3 As shown, in order to further improve the feeding effect, in this embodiment, the first gate end 141 and the second gate end 241 respectively form a sprue section 3. The two sprue sections 3 are corresponding and gradually shrink from the top surface to the bottom surface. The first gate end 142 and the second gate end 242 respectively form an extension section 4 extending in the vertical direction. When casting the inner hinge, a heating agent is added to the sprue section 3 so that the sand mold sprue has the effect of riser feeding. The two extension sections 4 are corresponding and cylindrical. The extension section 4 on the first template 1 is connected to the first punch 12, and the extension section 4 on the second template 2 is connected to the second punch 22.

[0028] like Figure 1 , Figure 3 As shown, specifically, the front of the first punch 12 and the second punch 22 are respectively recessed to form multiple weight-reducing grooves 6 distributed along their length direction. The front of the first punch 12 protrudes forward to form two side chills 7, which are located below the weight-reducing grooves 6, with one side chill 7 located between two adjacent weight-reducing grooves 6. The weight-reducing groove 6 closest to the first sprue 14 or the second sprue 24 is the first weight-reducing groove 61. The first parting surface 11 and the second parting surface 21 also each protrude forward with a reference surface chill 8 located below the first punch 12 or the second punch 22 and corresponding to the first weight-reducing groove 61. The two reference surface chills 8 correspond to and are connected to the first punch 12 and the second punch 22, respectively. The design of the side chills 7 and the reference surface chills 8 not only improves the feeding effect but also reduces the size of the feeding riser.

[0029] like Figure 1 , Figure 3 As shown, in this embodiment, the first parting surface 11 and the second parting surface 21 are respectively recessed from the front side of the first template 1 and the front side of the second template 2, so that a first groove 10 is formed between the first parting surface 11 and the front side of the first template 1, and a second groove 20 is formed between the second parting surface 21 and the front side of the second template 2. The bottom sidewalls of the first groove 10 and the second groove 20 are respectively provided with a support plate 9 extending along its length direction. The support plate 9 protrudes forward relative to the front side of the first template 1 or the second template 2. When the sand mold is placed in the sand box, the support plate 9 supports the sand mold, so that the sand mold is placed in a balanced position, which facilitates the embedding of steel shot in the box.

[0030] like Figure 2 , Figure 3 As shown, in order to improve the venting effect, the first parting surface 11 is provided with a first venting plate 15 on the side of the top surface of the first punch 12 near the first sprue 14, and the first venting plate 15 is connected to the first punch 12; the second parting surface 21 is provided with a second venting plate 25 on the side of the top surface of the second punch 22 near the second sprue 24, and the second venting plate 25 is connected to the second punch 22 and corresponds to the first venting plate 15. The first venting plate 15 and the second venting plate 25 have the same structure and form a venting channel for the sand mold. The sand mold vents through the venting channel, thereby reducing the porosity of the casting.

[0031] This utility model discloses a vertical casting sand mold for a folding box with an internal hinge. It incorporates a first sprue and a second sprue. The first sprue gradually increases in size from the first gate end to the first inlet end, with its axis parallel to the first parting surface. The second sprue gradually increases in size from the second gate end to the second inlet end, with its axis parallel to the second parting surface. These two sprues together form a sand mold sprue, creating a gradually increasing sprue structure from top to bottom to directly feed the casting. This not only improves the feeding effect and prevents shrinkage porosity and shrinkage holes in the casting, but also reduces the number of feeding risers. This utility model's vertical casting sand mold for a folding box with an internal hinge features a simple structure and excellent feeding effect.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vertical sand casting mold for the inner hinge of a folding box, characterized in that, Includes a first template and a second template corresponding to the first template; The first parting surface on the front side of the first template protrudes forward to form a first punch, a first riser and a first sprue located on one side of the first punch. The first riser is connected to the first punch. The first sprue has a first gate end and a first inlet end located below the first gate end and connected to the first punch. The first sprue gradually increases in size from the first gate end to the first inlet end and its axis is parallel to the first parting surface. The second parting surface on the front side of the second template protrudes forward to form a second punch corresponding to the first punch, a second riser corresponding to the first riser, and a second sprue corresponding to the first sprue. The second riser is connected to the second punch. The second sprue has a second gate end corresponding to the first gate end and a second inlet end located below the second gate end and connected to the second punch. The second inlet end corresponds to the first inlet end. The second sprue gradually increases in size from the second gate end to the second inlet end, and its axis is parallel to the second parting surface.

2. The vertical sand casting mold for the inner hinge of the folding box as described in claim 1, characterized in that, The first gate end and the second gate end each form a sprue section, the two sprue sections are corresponding and gradually shrink from the top surface to the bottom surface, the first injection end and the second injection end each form an extension section extending in the vertical direction, the two extension sections are corresponding, and the extension section on the first template is connected to the first punch, and the extension section on the second template is connected to the second punch.

3. The vertical sand casting mold for the inner hinge of the folding box as described in claim 1, characterized in that, The cross-sections of the first and second sprues are arc-shaped.

4. The vertical sand casting mold for the inner hinge of the folding box as described in claim 1, characterized in that, The first punch and the second punch have arc-shaped portions. The first sprue is located outside the first side of the first punch away from the arc-shaped portion and is connected to the outer wall of the first side. The second sprue is located outside the second punch outside the first side away from the arc-shaped portion and is connected to the outer wall of the first side.

5. The vertical sand casting mold for the inner hinge of the folding box as described in claim 1, characterized in that, There are two first risers, which are located above the first punch and one of the first risers is close to the arc-shaped part of the first punch relative to the other first riser. There are two second risers, one of which corresponds to one of the first risers.

6. The vertical sand casting mold for the inner hinge of a folding box as described in claim 1, characterized in that, The front of the first punch is recessed to form a plurality of weight-reducing grooves distributed along its length and protrudes forward to form two side chills. The two side chills are located below the weight-reducing grooves, and one of the side chills is located between two adjacent weight-reducing grooves.

7. The vertical sand casting mold for the inner hinge of a folding box as described in claim 1, characterized in that, The front of the first punch and the second punch are respectively recessed to form a plurality of weight-reducing grooves distributed along their length direction. The weight-reducing groove near the first sprue or the second sprue is the first weight-reducing groove. The first parting surface and the second parting surface respectively have a reference surface chill protruding forward, which is located below the first punch or the second punch and corresponds to the first weight-reducing groove. The two reference surface chills are corresponding and respectively connected to the first punch and the second punch.

8. The vertical sand casting mold for the inner hinge of a folding box as described in claim 1, characterized in that, The first parting surface and the second parting surface are respectively recessed from the front side of the first template and the front side of the second template, so that a first groove is formed between the first parting surface and the front side of the first template, and a second groove is formed between the second parting surface and the front side of the second template. The bottom sidewalls of the first groove and the second groove are respectively provided with a support plate extending along its length direction, and the support plate protrudes forward relative to the front side of the first template or the second template.

9. The vertical sand casting mold for the inner hinge of a folding box as described in claim 1, characterized in that, The first parting surface has a first vent plate on the side of the top surface of the first punch near the first sprue, and the first vent plate is connected to the first punch; the second parting surface has a second vent plate on the side of the top surface of the second punch near the second sprue, and the second vent plate is connected to the second punch and corresponds to the first vent plate.

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