Water accumulation prevention post-cast strip and forming device thereof

Abstract

The utility model discloses an anti-ponding post-cast strip and a forming device thereof in the technical field of anti-ponding post-cast strips, which are characterized in that a water guide surface with gradually reduced height is formed at the top of the anti-ponding post-cast strip from the middle to a first main body and a second main body on two sides, so that the water guide surface on the top surface of the anti-ponding post-cast strip is inclined to the horizontal plane; water on the water guide surface can be automatically drained to the first main body and the second main body on the two sides under the action of gravity, so that the water is prevented from being gathered on the water accumulation prevention post-cast strip, the water accumulation prevention effect is achieved, the water is prevented from being gathered in a waterproof weak area, the probability of water seepage of the water accumulation prevention post-cast strip due to water accumulation is reduced, the service life of a building is prolonged, and potential safety hazards are reduced. Meanwhile, the structure is simple, only the water guide face needs to be formed on the top face of the water accumulation prevention post-cast strip, refined design, material optimization and strict construction control are not needed, and the construction difficulty and the construction cost are not affected while the water seepage probability of the water accumulation prevention post-cast strip is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anti-accumulation water post-pouring belt, specifically to an anti-accumulation water post-pouring belt and a forming device thereof. BACKGROUND

[0002] The anti-accumulation water post-pouring belt is a concrete belt left at the corresponding positions of the base plate, wall and beam in the anti-accumulation water post-pouring belt to prevent harmful cracks that may be caused by uneven self-shrinkage or uneven settlement of the reinforced concrete structure.

[0003] During the process of the anti-accumulation water post-pouring belt, the construction quality of the anti-accumulation water post-pouring belt is crucial to the waterproof performance and structural stability of the building. Figure 1 As shown in the prior art, the top surface of the conventional anti-accumulation water post-pouring belt is flush with the left and right floor slabs, but the anti-accumulation water post-pouring belt is difficult to be vibrated into place during pouring due to the small pouring range and amount, and it is difficult to ensure the compactness, which is prone to pouring into a concave surface, and the flat connection mode causes the anti-accumulation water post-pouring belt to be prone to water accumulation and seepage, which not only affects the service life of the building, but also may cause safety hazards.

[0004] For example, a waterproof structure of a basement bottom plate anti-accumulation water post-pouring belt is disclosed in the Chinese Utility Model Patent with the authorization announcement No. CN214497605U, which forms a continuous zigzag joint between the concrete bottom plate and the anti-accumulation water post-pouring belt, and a rubber waterstop is embedded between the concrete bottom plate and the anti-accumulation water post-pouring belt, which extends towards the inside of the concrete bottom plate and the anti-accumulation water post-pouring belt on both sides. The application has the advantages that the use of the rubber waterstop does not cause rusting, and can improve the long-term waterproof effect of the anti-accumulation water post-pouring belt.

[0005] Although it solves the waterproof problem of the connection position on both sides of the anti-accumulation water post-pouring belt, it does not solve the problem of water accumulation on the top surface of the anti-accumulation water post-pouring belt due to pouring defects, and the anti-accumulation water post-pouring belt itself still has the risk of water seepage.

[0006] Therefore, the utility model designs an anti-accumulation water post-pouring belt and a forming device thereof to solve the above problems. UTILITY MODEL CONTENTS

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an anti-accumulation water post-pouring belt for being arranged between a first main body and a second main body and for connecting the first main body and the second main body, a water guide surface with a gradually decreasing height from the middle to both sides of the first main body and the second main body is formed on the top surface of the anti-accumulation water post-pouring belt, and the water guide surface is used for guiding the water on the anti-accumulation water post-pouring belt to flow towards the first main body and the second main body.

[0008] As a further scheme of the utility model, the two sides of the water-accumulation-preventing post-cast strip are provided with tenons, and the tenons are used for clamping and matching with the pre-set tenon grooves on the first body or the second body.

[0009] As a further scheme of the utility model, the tenon bottom surface inclines downward along the direction away from the center of the water-accumulation-preventing post-cast strip.

[0010] As a further scheme of the utility model, the height of the water guide surface used for abutting with the first body is the same as the height of the first body, and the height of the water guide surface used for abutting with the second body is the same as the height of the second body.

[0011] As a further scheme of the utility model, the transition angle of the water guide surface relative to the horizontal plane is not less than 170 degrees.

[0012] As a further scheme of the utility model, the height difference between the highest point and the lowest point of the water guide surface is not more than 4 cm.

[0013] As a further scheme of the utility model, the water guide surface is arc-shaped.

[0014] A forming device is used for forming a water-accumulation-preventing post-cast strip, and the forming device comprises a forming part and a holding part.

[0015] As a further scheme of the utility model, one side of the forming part in the width direction is provided with a groove used for collecting excess pouring materials when the water guide surface is formed.

[0016] As a further scheme of the utility model, one side or both sides of the forming part in the width direction are provided with guide surfaces used for pushing the excess pouring materials to both sides of the forming part in the length direction when the water guide surface is formed.

[0017] The utility model has the following beneficial effects:

[0018] By forming the water guide surface with the height gradually decreasing from the middle to both sides of the first body and the second body on the top of the water-accumulation-preventing post-cast strip, the water guide surface on the top surface of the water-accumulation-preventing post-cast strip inclines to the horizontal plane, so that the water on the water guide surface can flow to both sides of the first body and the second body under the action of gravity, self-draining is realized, water accumulation on the water-accumulation-preventing post-cast strip is prevented, the effect of preventing water accumulation is achieved, water accumulation in the weak waterproof area is prevented, the probability of water seepage of the water-accumulation-preventing post-cast strip due to water accumulation is reduced, the service life of the building is improved, the safety hidden danger is reduced, meanwhile, the structure of the scheme is simple, the water guide surface only needs to be formed on the top surface of the water-accumulation-preventing post-cast strip, without the need of fine design, material optimization and strict construction control, while the probability of water seepage of the water-accumulation-preventing post-cast strip is reduced, the construction difficulty and construction cost are not affected.

[0019] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in

[0021] Figure 1 is a prior art structure schematic diagram;

[0022] Figure 2 is a water accumulation prevention post-cast strip structure schematic diagram in the present application;

[0023] Figure 3 is a forming device structure schematic diagram in the present application;

[0024] Figure 4 is a guide surface structure schematic diagram in the present application.

[0025] LEGEND KEY

[0026] 1, first body; 2, second body; 3, water accumulation prevention post-cast strip; 31, water guide surface; 32, tenon; 4, tenon groove; 51, forming part; 511, forming surface; 52, holding part; 53, groove; 54, guide surface. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the drawings, but the present application can be implemented in various different ways as defined and covered below.

[0028] Referring to Figures 1-4 The present application provides a technical solution: a water accumulation prevention post-cast strip for being arranged between a first body 1 and a second body 2 and for connecting the first body 1 and the second body 2, a water accumulation prevention post-cast strip 3 top surface is formed with a water guide surface 31 gradually decreasing in height from the middle to both sides, the water guide surface 31 is used to guide the water on the water accumulation prevention post-cast strip 3 to flow to the first body 1 and the second body 2, to prevent the water from accumulating on the water guide surface 31 of the water accumulation prevention post-cast strip 3, so as to reduce the probability of water seepage at the position of the water accumulation prevention post-cast strip 3;

[0029] During construction, first, the first body 1 and the second body 2 are cast and formed, and the space of the water-accumulation-preventing post-pouring belt 3 is left between the first body 1 and the second body 2, and after the first body 1 and the second body 2 are constructed and more than 50% of the settlement is completed, the water-accumulation-preventing post-pouring belt 3 is constructed, and during the construction of the water-accumulation-preventing post-pouring belt 3, because the construction range of the water-accumulation-preventing post-pouring belt 3 is small, the pouring amount is small, and the steel bars are dense in some areas, it is difficult to vibrate to the position during pouring, and it is difficult to ensure the compactness, so it is easy to form a concave surface, a honeycomb and a hole (when the porosity is greater than 5%, the water seepage probability significantly increases) on the water-accumulation-preventing post-pouring belt 3, which causes the water-accumulation-preventing post-pouring belt 3 to easily accumulate and seep water, and becomes a weak waterproof area, if the water seepage probability needs to be reduced, the construction quality of the water-accumulation-preventing post-pouring belt needs to be strictly controlled, the design needs to be fine (such as pre-embedding a grouting pipe system), the material needs to be optimized (shrinkage-compensating concrete), and the construction control needs to be strictly controlled (three-dimensional coordinate positioning water stop belt), which not only increases the construction difficulty, but also increases the construction cost, and after the water guide surface 31 inclined to the horizontal plane is formed on the top surface of the water-accumulation-preventing post-pouring belt 3, the water on the water-accumulation-preventing post-pouring belt 3 can be guided to the first body 1 and the second body 2 on both sides through the angle of the water guide surface 31, so as to prevent the water from staying and gathering on the top surface of the water-accumulation-preventing post-pouring belt 3, thereby achieving the effect of preventing water accumulation and reducing the probability of water seepage caused by water accumulation in the water-accumulation-preventing post-pouring belt 3.

[0030] By forming the water guide surface 31 with a gradually decreasing height from the middle to the first body 1 and the second body 2 on the water-accumulation-preventing post-pouring belt 3, the water on the water-accumulation-preventing post-pouring belt 3 is guided to the first body 1 and the second body 2 on both sides under the action of gravity, thereby achieving the effect of preventing water accumulation on the water-accumulation-preventing post-pouring belt 3 and reducing the water leakage probability of the finally formed building, and the scheme has a simple structure, only needs to form the water guide surface on the top surface of the water-accumulation-preventing post-pouring belt, and does not need fine design, material optimization and strict construction control, thereby achieving the effect of reducing the water seepage probability of the water-accumulation-preventing post-pouring belt without affecting the construction difficulty and the construction cost.

[0031] Further, as shown in Figure 2 both sides of the water-accumulation-preventing post-pouring belt 3 are provided with tenons 32, the tenons 32 are used for clamping and matching with the pre-set mortises 4 on the first body 1 or the second body 2, and are used for increasing the waterproof effect of the connection position of the water-accumulation-preventing post-pouring belt 3, the first body 1 and the second body 2;

[0032] The traditional anti-accumulation post-pouring belt 3 will be chiseled in the first body 1 and the second body 2 for connecting with the anti-accumulation post-pouring belt 3 during pouring, a vertical surface is chiseled, and the anti-accumulation post-pouring belt 3 is connected through the vertical surface, but the concrete strength grade of the anti-accumulation post-pouring belt 3 is higher than that of the original structure or the settlement difference of the structures on both sides of the anti-accumulation post-pouring belt 3 exceeds the allowable value, which will cause cracking between the anti-accumulation post-pouring belt 3 and the structures on both sides, so that the connection between the anti-accumulation post-pouring belt 3 and the first body 1 and the second body 2 is a weak waterproof area after the pouring of the anti-accumulation post-pouring belt 3 is completed, and water seepage is prone to occur, therefore, the anti-accumulation post-pouring belt 3 is connected with the first body 1 and the second body 2 through the tenon 32 and the mortise 4 to increase the waterproof performance of the connection between the anti-accumulation post-pouring belt 3 and the first body 1 and the second body 2, when pouring the anti-accumulation post-pouring belt 3, the first body 1 and the second body 2 are chiseled to form a mortise 4, then the anti-accumulation post-pouring belt 3 is poured in the gap between the first body 1 and the second body 2, and the pouring material is also filled into the mortise 4 when the anti-accumulation post-pouring belt 3 is poured, so that the tenon 32 is formed on both sides of the finally formed anti-accumulation post-pouring belt 3, the anti-accumulation post-pouring belt 3 is clamped and matched with the mortise 4 opened in the first body 1 and the second body 2 through the tenon 32, when the tenon 32 is formed, the pouring material is closely attached to the bottom surface of the mortise 4 under the action of gravity, so that the tightness of the connection between the anti-accumulation post-pouring belt 3 and the first body 1 and the second body 2 is increased, and the path complexity of the connection between the anti-accumulation post-pouring belt 3 and the first body 1 and the second body 2 is increased, so that water is more difficult to seep downward from the connection between the anti-accumulation post-pouring belt 3 and the first body 1 and the second body 2, and the waterproof effect of the connection between the anti-accumulation post-pouring belt 3 and the first body 1 and the second body 2 is further increased.

[0033] The mortise 4 can be arranged at any position on the side of the first body 1 and the second body 2 connected with the anti-accumulation post-pouring belt 3, preferably, the mortise 4 is arranged at the top end of the side of the first body 1 and the second body 2 connected with the anti-accumulation post-pouring belt 3, in the actual construction process, it is most convenient to arrange the mortise 4 at the top end of the side of the first body 1 and the second body 2 connected with the anti-accumulation post-pouring belt 3, and meanwhile, the mortise 4 arranged at the top end of the first body 1 and the second body 2 is convenient for filling the pouring material, so that the pouring material can be completely filled in the mortise 4, the forming quality of the tenon 32 is ensured, and the construction difficulty is reduced;

[0034] Further, the bottom surface of the tenon 32 is inclined downward along the direction away from the center of the anti-accumulation post-pouring belt 3, as shown in Figure 2As shown, the bottom surface of the tenon 32 is an inclined surface, and the shape of the mortise 4 matches the shape of the tenon 32, so the bottom surface of the mortise 4 is also an inclined surface. When water enters the mortise 4 and flows to the bottom surface of the mortise 4, the water needs to accumulate to a certain liquid level before it can leave the mortise 4 and continue to penetrate downward, which undoubtedly increases the difficulty of water penetrating from the connecting part between the two sides of the water-accumulation-preventing post-cast joint 3 to the lower layer, thereby further increasing the waterproof effect of the water-accumulation-preventing post-cast joint 3.

[0035] Specifically, the height of the water guide surface 31 used in the abutment with the first body 1 is the same as the height of the first body 1, and the height of the water guide surface 31 used in the abutment with the second body 2 is the same as the height of the second body 2.

[0036] After the water-accumulation-preventing post-cast joint 3 is formed, it needs to be coated or laid with waterproof material. The two sides of the water guide surface 31 and the first body 1 and the second body 2 are smoothly transitioned without height difference. After the water-accumulation-preventing post-cast joint 3 is poured and formed, the waterproof material can be laid on the water-accumulation-preventing post-cast joint 3 and the first body 1 and the second body 2, so that the waterproof material can closely adhere to the abutment position of the water guide surface 31 and the first body 1 and the second body 2, preventing the waterproof material from not being completely fitted due to the height difference between the water guide surface 31 and the top surfaces of the first body 1 and the second body 2 when the waterproof material is laid, to ensure that the finally laid waterproof material can achieve its waterproof effect.

[0037] Specifically, the transition angle of the water guide surface 31 relative to the horizontal plane is not less than 170°.

[0038] Because the middle position of the water guide surface 31 is higher than the top surfaces of the first body 1 and the second body 2, a female corner, that is, an inwardly concave corner, is inevitably formed at the abutment position of the water guide surface 31 and the first body 1 and the second body 2. When the waterproof material is laid through the female corner, it needs to be bent to completely fit the female corner, and the bending position of the waterproof material will generate a restoring force to separate the waterproof material from the female corner. The closer the transition angle of the water guide surface 31 and the top surfaces of the first body 1 and the second body 2 to 180°, the closer the female corner formed at the abutment position of the water guide surface 31 and the first body 1 and the second body 2 to a plane, and the smaller the bending angle of the waterproof material, and the smaller the restoring force generated by the waterproof material. Therefore, the transition angle between the water guide surface 31 and the top surfaces of the first body 1 and the second body 2 is controlled to be not less than 170°. Within this range, the size of the restoring force generated at the bending position of the waterproof material has less effect on the waterproof material, thereby reducing the probability of the waterproof material separating from the female corner in the subsequent use process and increasing the waterproof safety.

[0039] Specifically, the height difference between the highest and lowest points of the water guiding surface 31 is no more than 4cm, thereby reducing the height difference between the highest point of the water guiding surface 31 and the top surface of the first main body 1 and the top surface of the second main body 2.

[0040] The greater the height difference between the highest point of the water guide surface 31 and the top surfaces of the first main body 1 and the second main body 2, the more obvious the protrusion of the anti-water accumulation post-pouring strip 3 will be, and the more obvious the stress concentration of the water guide surface 31 will be. In order to ensure the flatness of the top surfaces of the first main body 1, the water guide surface 31 and the second main body 2 as much as possible, the height difference between the highest point of the water guide surface 31 and the top surfaces of the first main body 1 and the second main body 2 will be controlled to be no more than 4cm. Within this range, the stress concentration of the water guide surface 31 will be small, and it will not affect the subsequent paving.

[0041] Specifically, the shape of the water guiding surface 31 can be any shape, as long as it can guide water to flow towards the first main body 1 and the second main body 2;

[0042] Preferred, such as Figure 2 As shown, the water guiding surface 31 is arc-shaped. The arc-shaped water guiding surface 31 can make the transition of the height change position on the water guiding surface 31 smoother. At the same time, there are no corners on the arc-shaped water guiding surface 31, which can make the waterproof material adhere more closely to the water guiding surface 31 when it is laid later, and make it easier to lay the waterproof material.

[0043] A molding device for molding a water-proof post-pouring strip, the molding device includes a molding part 51 and a holding part 52. The bottom surface of the molding part 51 has a molding surface 511 that matches the water guiding surface 31 for molding the water guiding surface 31. The holding part 52 is disposed on the molding part 51.

[0044] When pouring the anti-water accumulation strip 3, the pouring material at the position of the anti-water accumulation strip 3 is higher than the forming outline of the anti-water accumulation strip 3. After the pouring material initially sets, the forming surface 511 at the bottom of the forming part 51 is used to remove the excess pouring material and form the water guiding surface 31 on the pouring material. In this way, the water guiding surface 31 on the anti-water accumulation strip 3 is formed. There is no need to use a special pouring mold. The anti-water accumulation strip 3 can be easily shaped using this tool. This not only reduces the purchase and rental cost of molds, but also simplifies the construction process, shortens the construction cycle, and improves the construction efficiency. At the same time, the forming part 51 is provided with a gripping part 52, which makes it easy for the workers to hold the forming device to shape the water guiding surface 31.

[0045] When forming the water guide surface 31, the operator holds the grip part 52 and then moves the forming part 51 along the length of the anti-water accumulation post-pouring strip 3. The forming part 51 pushes away the excess casting material, so that the top of the anti-water accumulation post-pouring strip 3 forms the water guide surface 31. The operation is simple and convenient.

[0046] Specifically, the holding part 52 is arranged at the top end of the forming part 51, and when the water guide surface 31 is formed by the forming part 51, the forming surface 511 at the bottom end of the forming part 51 needs to be vertically downward and then moved, and the holding part 52 arranged at the top end of the forming part 51 can facilitate the operator to hold;

[0047] Specifically, the holding part 52 can be a handle or a groove, which can be designed according to the operation habit of the operator, and the present application does not limit this.

[0048] Specifically, when the water guide surface 31 is formed, the casting material outside the water guide surface 31 needs to be removed by the forming device, so that the excess casting material is processed in time to prevent the removed casting material from affecting the formation of the water guide surface 31;

[0049] As shown in Figure 3 some examples, one side of the forming part 51 in the width direction is provided with a groove 53 for collecting excess casting material when the water guide surface 31 is formed;

[0050] When the water guide surface 31 is formed, the forming part 51 is moved along the length direction of the water-accumulation-preventing post-cast strip 3, and the forming part 51 pushes the excess casting material through one side in the width direction of the forming part 51. After the groove 53 for collecting the casting material is arranged on the forming part 51, the opening of the groove 53 is directed to the moving direction of the forming part 51 during use, so that the excess casting material can be completely collected into the groove 53. The excess casting material can also be continuously used subsequently, realizing the reuse of the casting material. Meanwhile, the groove 53 is used to collect the excess casting material, so that the subsequent step of cleaning the excess casting material is omitted, and the use is more convenient;

[0051] As shown in Figure 4 some examples, one side or both sides of the forming part 51 in the width direction is provided with a guide surface 54 for pushing the excess casting material to both sides of the length direction of the forming part 51 when the water guide surface 31 is formed;

[0052] As shown in Figure 4 from the bottom of the forming part 51, one side of the forming part 51 in the width direction is provided with a sharp head, the sharp head is located at the highest point of the water guide surface 31, and the sharp head and both ends of the length direction of the forming part 51 are connected to form the guide surface 54. When the water guide surface 31 of the water-accumulation-preventing post-cast strip 3 is formed by the forming part 51, the excess casting material can be pushed to move to both sides of the forming part 51 by the guide surface 54, and finally pushed to move to the first main body 1 and the second main body 2. In this example, since the excess casting material is pushed to the first main body 1 and the second main body 2, the water guide surface 31 can be continuously formed without stopping in the middle, and the water guide surface 31 can be continuously and uninterruptedly formed.

[0053] Further, in order to make the forming quality of the water guide surface 31 better, limiting baffles limiting the movement of the forming device can be arranged on the first body 1 and the second body 2, the spacing between the limiting baffles is the same as the length of the forming part on the forming device, when the water guide surface 31 is formed, the limiting baffles limit the forming part to move only along the length direction of the water-accumulation-preventing post-pouring belt, so as to ensure that the finally formed water guide surface 31 is consistent with the theoretical profile, and prevent the actual profile of the water guide surface 31 from deviating from the theoretical profile due to the manual error of the operator.

[0054] It should be noted that, for the foregoing method embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited to the action sequence described, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0055] The above are only preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0056] Finally, it should also be noted that in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, and do not necessarily require or imply that these entities or actions exist in any such actual relationship or order. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed or other elements inherent in such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

Claims

1. A water-accumulation-preventing post-cast strip for being arranged between a first body (1) and a second body (2) and for connecting the first body (1) and the second body (2), characterized in that: The top surface of the water-accumulation-preventing post-cast strip (3) is formed with a water guide surface (31) gradually decreasing in height from the middle to both sides, which is used to guide the water on the water-accumulation-preventing post-cast strip (3) to flow to the first body (1) and the second body (2).

2. The water-accumulation-preventing post-cast strip according to claim 1, characterized in that: Both sides of the water-accumulation-preventing post-cast strip (3) are provided with tenons (32) used to be engaged with the mortises (4) pre-set on the first body (1) or the second body (2).

3. The water-accumulation-preventing post-cast strip according to claim 2, characterized in that: The bottom surface of the tenon (32) is inclined downward along the direction away from the center of the water-accumulation-preventing post-cast strip (3).

4. The water-accumulation-preventing post-cast strip according to claim 1, characterized in that: The height of the water guide surface (31) used to abut the first body (1) is the same as the height of the first body (1), and the height of the water guide surface (31) used to abut the second body (2) is the same as the height of the second body (2).

5. The water-accumulation-preventing post-cast strip according to claim 1, characterized in that: The transition angle of the water guide surface (31) relative to the horizontal plane is not less than 170°.

6. The water-accumulation-preventing post-cast strip according to claim 1, characterized in that: The height difference between the highest point and the lowest point of the water guide surface (31) is not more than 4 cm.

7. The water-accumulation-preventing post-cast strip according to claim 1, characterized in that: The water guide surface (31) is arc-shaped.

8. A forming device characterized by: The molding device for molding the water-accumulation-preventing post-cast strip of any one of claims 1-7 comprises a molding part (51) and a holding part (52), the bottom surface of the molding part (51) is provided with a molding surface (511) matching the water guide surface (31) and used to mold the water guide surface (31), and the holding part (52) is arranged on the molding part (51).

9. A forming device according to claim 8, characterised in that: One side of the molding part (51) in the width direction is provided with a groove (53) used to collect the excess casting material when the water guide surface (31) is molded.

10. A forming device according to claim 8, characterized in that: One side or both sides of the molding part (51) in the width direction are provided with guide surfaces (54) used to push the excess casting material to both sides of the molding part (51) in the length direction when the water guide surface (31) is molded.

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