Combined core mold for molding duckbill valve

Abstract

The utility model provides a duckbill valve forming combined type core mold which comprises an upper mold, a lower mold and a lower mold, the upper mold comprises a first mold block, a second mold block and a third mold block, the first mold block and the third mold block are connected with the two sides of the second mold block in a clamped mode respectively, and the first mold block and the third mold block are the same in structure; sliding rails are arranged on the connecting faces of the second module and the first module and the third module, and sliding grooves matched with the sliding rails are formed in the first module and the third module. The second module is connected with the lower die, and the interiors of the lower die, the first module, the second module and the third module are hollow; the steel sheet is arranged on the transverse rod, and the steel sheet is inserted into a steel sheet gap formed in the upper die. According to the utility model, the integral structural volume of the core mold is reduced through a mode of assembling and synthesizing the core mold by a split structure, the production difficulty in the core mold casting process is reduced, and the equipment investment cost of the core mold is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of duckbill valve production molds, and particularly relates to a duckbill valve forming assembly core mold. Background Technology

[0002] Duckbill valves, also known as rubber sewage check valves, can prevent floodwater and sewage from flowing back into street sewers and basements. This valve is an environmentally friendly green valve with no moving parts, is trouble-free, maintenance-free, and has a long service life.

[0003] Because of the special shape of the duckbill valve, its overall shape is irregular and difficult to form. Therefore, the design of the mold structure for large-sized duckbill valves is also more difficult. In particular, the production of the core mold structure for duckbill valves is difficult and the equipment investment cost is high during the production of large duckbill valves. This deformation increases the production cost of duckbill valves. Utility Model Content

[0004] This utility model provides a combined core mold for duckbill valve molding, which aims to solve the problem that the current production process of large duckbill valves using an integrated core mold structure is difficult to manufacture, has high equipment investment costs, and is equivalent to deformation increasing the production cost of duckbill valves.

[0005] This utility model is implemented as follows: a duckbill valve molding assembly core mold, comprising:

[0006] The upper mold includes a first module, a second module, and a third module. The first module and the third module are respectively engaged with the two sides of the second module. The first module and the third module have the same structure. The connecting surfaces of the second module and the first and third modules are provided with slide rails. The first module and the third module are provided with slide grooves that are adapted to the slide rails.

[0007] The lower mold, the second module is connected to the lower mold, and the lower mold, the first module, the second module and the third module are hollow inside;

[0008] A steel sheet and a crossbar, wherein the steel sheet is set on the crossbar and inserted into a steel sheet gap provided on the upper mold.

[0009] Preferably, the first module and the third module are symmetrical circular arc structures.

[0010] Preferably, the bottom of the lower mold is provided with a reinforcing ring, and several sets of handles are distributed in a ring array around the lower mold.

[0011] Preferably, the second module has stepped support surfaces on both sides, and different stepped support surfaces are connected to the first module and the third module respectively.

[0012] Preferably, the step support surface includes a support surface and a side contact surface, and the support surface and the side contact surface are perpendicular to each other.

[0013] Preferably, the end face of the first module that contacts the second module is provided with a protrusion, the protrusion is provided with a first connecting surface, the part of the end face of the first module that contacts the second module without the protrusion is the second connecting surface, the protrusion is in contact with the step support surface, and the second connecting surface is in contact with the end face of the second module.

[0014] Preferably, the slide groove is disposed on the first connecting surface and the second connecting surface, and the end face and side contact surface of the second module that contact the second connecting surface are provided with slide rails adapted to the slide groove.

[0015] Preferably, the lower mold and the upper mold are hollow shell structures, and the interior of the lower mold and the upper mold is provided with a number of reinforcing rods to enhance the structural strength.

[0016] Preferably, the crossbar is a galvanized steel pipe, and the crossbar is provided with reinforcing ribs inside.

[0017] Preferably, the top of the upper mold is provided with a connecting plate, the inside of the connecting plate is provided with a steel sheet gap for accommodating the insertion of a thin steel sheet, the thin steel sheet is provided with wavy connecting teeth, and the connecting teeth are inserted into the steel sheet gap.

[0018] Compared with the prior art, the embodiments of this application have the following main advantages:

[0019] The duckbill valve molding assembly core mold provided by this utility model reduces the overall structural volume of the core mold by assembling the first and third modules in a sliding manner and the second module in a split structure assembly to form the core mold, thereby reducing the production difficulty of the core mold casting process and the equipment investment cost of the core mold. The structure of this application is simple and easy to assemble, making it suitable for use in the production process of large duckbill valve structures and reducing the production cost of large duckbill valves. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a duckbill valve molding assembly core mold provided by this utility model.

[0021] Figure 2 This is an exploded structural diagram of a duckbill valve molding assembly core mold provided by this utility model.

[0022] Figure 3 This is a schematic diagram of the first and second modules of a duckbill valve molding assembly core mold provided by this utility model.

[0023] Figure 4 This is a schematic diagram of the bottom structure of a duckbill valve molding assembly core mold provided by this utility model.

[0024] Figure 5 This is a schematic diagram of the stepped support surface structure of a duckbill valve molding assembly core mold provided by this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Lower mold; 11. Handle; 12. Reinforcing ring; 2. Upper mold; 21. First module; 211. First connecting surface; 212. Second connecting surface; 22. Second module; 221. Support surface; 222. Side contact surface; 23. Third module; 24. Slide rail; 25. Slide groove; 3. Steel sheet; 4. Crossbar; 51. Reinforcing rod; 52. Opening. Detailed Implementation

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] This utility model embodiment provides a combined core mold for forming a duckbill valve, such as... Figures 1-5 As shown, the duckbill valve molding assembly core mold includes:

[0030] The upper mold 20 includes a first module 21, a second module 22, and a third module 23. The first module 21 and the third module 23 are respectively engaged with the two sides of the second module 22. The first module 21 and the third module 23 have the same structure. The connecting surface of the second module 22 with the first module 21 and the third module 23 is provided with a slide rail 24. The first module 21 and the third module 23 are provided with a slide groove 25 adapted to the slide rail 24.

[0031] The lower mold 10 is connected to the second module 22. The lower mold 10, the first module 21, the second module 22 and the third module 23 are hollow inside. The upper mold 20 composed of the first module 21, the second module 22 and the third module 23 is adapted to the shape of the duckbill valve. During the gel molding process, the gel body of the duckbill valve is covered on the core mold composed of the upper mold 20 and the lower mold 10.

[0032] The steel sheet 30 and the crossbar 40 are provided. The steel sheet 30 is set on the crossbar 40 and inserted into the steel sheet gap provided on the upper mold 20. The function of the steel sheet 30 is to help the colloid form the opening of the duckbill part. The crossbar 40 provides support for the steel sheet 30 and avoids the steel sheet 30 from deforming during the processing and affecting the outlet structure.

[0033] In this embodiment, the lower mold 10 adopts a cylindrical structure, and the first module 21 and the third module 23 are symmetrical arc structures. The first module 21 and the third module 23 are assembled on the second module 22 by sliding. The first module 21 and the third module 23 slide from the end of the second module 22 away from the lower mold 10 towards the lower mold 10. During the sliding process, the slide rail 24 enters the slide groove 25 to complete the connection between the first module 21 and the third module 23 and the second module 22; thus completing the shaping. The function of the steel sheet 30 is to allow the duckbill part to form an opening during the film fusion process, avoiding the opening from being completely closed during the fusion process. The function of the crossbar 40 is to support the steel sheet 30.

[0034] During processing, the film is applied layer by layer to the surface of the mold formed by the upper mold 20 and the lower mold 10. Except for the first layer of film, the other layers of film are formed by overlapping film of different widths around the circumference. When applying the first layer of film, the film at the steel sheet 30 needs to cover the crossbar 40 and be symmetrical about the crossbar 40 to ensure that the film completely covers the steel sheet 30. The film at the other parts is applied by overlapping around the circumference. The curtain is applied layer by layer from top to bottom. Except for the first layer which is wrapped over the crossbar 40, the other curtains are not wrapped. After all materials are applied, the outermost layer is wrapped with water cloth for shaping. After shaping, it is sent to the vulcanizing tank for vulcanization. The film is fused together to form an integral structure through vulcanization.

[0035] The use of a modular assembly method for the core mold reduces the overall volume of the core mold, lowers the production difficulty of the core mold casting process, and also reduces the production cost of the core mold. The structure of this application is simple and easy to assemble, making it suitable for use in the production process of large duckbill valve structures.

[0036] The lower mold 10 and the upper mold 20 are hollow shell structures. The hollow shell structure design further reduces the weight of the core mold and lowers the production cost of the core mold.

[0037] As a preferred embodiment of this embodiment, the lower mold 10 and the upper mold 20 are hollow shell structures. The lower mold 10 and the upper mold 20 are provided with a number of reinforcing rods 51 to enhance the structural strength. The first module 21, the second module 22 and the third module 23 are all provided with openings 52, which are for easy observation of internal structural changes.

[0038] The bottom of the lower mold 10 is provided with a reinforcing ring 12 to enhance the annular support force of the lower mold 10. Several sets of handles 11 are distributed in annular array around the lower mold 10. The handles 11 serve as connection points for other traction devices to assist the core mold in completing the demolding operation, and can also be manually pulled out to complete the demolding.

[0039] In a preferred embodiment of this invention, the second module 22 is provided with stepped support surfaces on both sides, and different stepped support surfaces are respectively connected to the first module 21 and the third module 23; the stepped support surface includes a support surface 221 and a side contact surface 222, and the support surface 221 and the side contact surface 222 are perpendicular to each other.

[0040] The end face where the first module 21 contacts the second module 22 is provided with a protrusion. The protrusion is provided with a first connecting surface 211. The part of the end face where the first module 21 contacts the second module 22 without the protrusion is the second connecting surface 212. The protrusion is in contact with the step support surface, and the second connecting surface 212 is in contact with the end face of the second module 22.

[0041] The slide groove 25 is provided on the first connecting surface 211 and the second connecting surface 212. The end face and side contact surface 222 of the second module 22 that contact the second connecting surface 212 are provided with slide rails 24 that are adapted to the slide groove 25.

[0042] In this embodiment, the connecting plane of the slide groove 25 and the slide rail 24 is added by constructing a stepped support surface; and the stepped structure of the slide groove 25 and the slide rail 24 is used to improve the connection strength between the first module 21, the second module 22 and the third module 23, so as to meet the production area in the production process and avoid the insufficient connection strength of the split structure from affecting the production quality.

[0043] In the actual production process, high-temperature resistant tape can be used to seal the first module 21, the second module 22 and the third module 23 to prevent excessive glue from entering the gaps and overflowing into the upper mold 20. Usually, the core mold contacts the inner wall of the duckbill valve. The flatness of the inner wall of the duckbill valve does not affect the functional application, so the surface roughness caused by using tape does not affect the performance of the final product.

[0044] In a further preferred embodiment of this utility model, the crossbar 40 is a galvanized steel pipe, and the crossbar 40 is provided with reinforcing ribs to enhance its strength;

[0045] The crossbar 40 is relatively long. When subjected to a large downward pulling force, the middle part deforms significantly, forming a noticeable arc. This causes material to accumulate below it, seriously affecting product quality. To reduce deformation, another identical crossbar 40 can be added 100-200mm above the crossbar 40. The two crossbars 40 are connected by several vertically tied wires, thereby increasing lateral rigidity, reducing deformation, and ensuring product quality.

[0046] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A composite core mold for forming a duckbill valve, characterized in that, include: The upper mold (20) includes a first module (21), a second module (22), and a third module (23). The first module (21) and the third module (23) are respectively engaged with the two sides of the second module (22). The first module (21) and the third module (23) have the same structure. The second module (22) is provided with a slide rail (24) on the connection surface with the first module (21) and the third module (23). The first module (21) and the third module (23) are provided with a slide groove (25) adapted to the slide rail (24). The lower mold (10) is connected to the second module (22), and the lower mold (10), the first module (21), the second module (22) and the third module (23) are hollow inside; A steel sheet (30) and a crossbar (40), wherein the steel sheet (30) is disposed on the crossbar (40) and the steel sheet (30) is inserted into a steel sheet gap provided on the upper mold (20).

2. The duckbill valve molding assembly core mold as described in claim 1, characterized in that, The first module (21) and the third module (23) are symmetrical circular arc structures.

3. The duckbill valve molding assembly core mold as described in claim 2, characterized in that, The bottom of the lower mold (10) is provided with a reinforcing ring (12), and a number of handles (11) are arranged in a ring array around the lower mold (10).

4. The duckbill valve molding assembly core mold as described in claim 3, characterized in that, The second module (22) has stepped support surfaces on both sides, and different stepped support surfaces are connected to the first module (21) and the third module (23) respectively.

5. The duckbill valve molding assembly core mold as described in claim 4, characterized in that, The step support surface includes a support surface (221) and a side contact surface (222), and the support surface (221) and the side contact surface (222) are perpendicular to each other.

6. The duckbill valve molding assembly core mold as described in claim 5, characterized in that, The end face of the first module (21) that contacts the second module (22) is provided with a protrusion, and the protrusion is provided with a first connecting surface (211). The part of the end face of the first module (21) that contacts the second module (22) without the protrusion is the second connecting surface (212). The protrusion is in contact with the step support surface, and the second connecting surface (212) is in contact with the end face of the second module (22).

7. The duckbill valve molding assembly core mold as described in claim 6, characterized in that, The slide groove (25) is provided on the first connecting surface (211) and the second connecting surface (212). The end face and side contact surface (222) of the second module (22) that contact the second connecting surface (212) are provided with slide rails (24) that are adapted to the slide groove (25).

8. The duckbill valve molding assembly core mold as described in claim 1, characterized in that, The lower mold (10) and the upper mold (20) are hollow shell structures, and the lower mold (10) and the upper mold (20) are provided with a number of reinforcing rods (51) to enhance the structural strength.

9. A duckbill valve molding assembly core mold as described in claim 8, characterized in that, The crossbar (40) is a galvanized steel pipe, and the crossbar (40) is provided with reinforcing ribs inside.

10. A duckbill valve molding assembly core mold as described in claim 9, characterized in that, The upper mold (20) is provided with a connecting plate at the top. The connecting plate has a steel sheet gap inside to accommodate the insertion of a thin steel sheet (30). The thin steel sheet (30) has wavy connecting teeth that are inserted into the steel sheet gap.

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