Mould for water dripping wheel shell and water dripping wheel shell blank thereof

Abstract

The utility model discloses a mold for a waterdrop wheel shell and a waterdrop wheel shell blank thereof. The mold comprises a bottom mold, an upper mold and a plurality of side molds, the bottom die, the upper die and the plurality of side dies are encircled to form a forming cavity of a water dropper shell blank; the side dies at least comprise a front side die and a rear side die; the inner end of the front side mold is provided with two transversely-arranged front mold columns in a protruding mode, a mold groove is reserved between the two front mold columns, the inner end of the rear side mold is provided with a transversely-arranged rear jacking column in a protruding mode, the rear jacking column transversely penetrates through the whole forming cavity and then is inserted into the mold groove, and a first gap is reserved between the top of the rear jacking column and the groove bottom of the mold groove. The first gap is a part of the forming cavity and is used for forming the upper cross beam of the water dropper shell blank; the forming cavity in the mold comprises the first gap which is specially used for forming the cross beam on the water drop wheel shell blank, and the first gap is formed by matching the front mold column and the rear ejection column, so that the position degree and the forming degree of the cross beam on the machined and formed water drop wheel shell blank are higher.

Description

Technical Field

[0001] The utility model relates to the field of water drop wheel shell production molds, in particular to a mold for a water drop wheel shell and a water drop wheel shell blank thereof. Background Art

[0002] The drop-shaped reel is a type of horizontal reel. It is mainly used for lure fishing, so it is also called a lure reel. Compared with spinning reels, drop-shaped reels have higher casting accuracy, smaller size, and easier to control the line output. The disadvantage is that casting is difficult to master and the line is prone to explode. Generally, professional anglers use drop-shaped reels more often in lure fishing.

[0003] In order to solve the problem of fishing reels easily breaking lines, the existing water drop reels on the market are equipped with a wire gauge structure for assisting in reeling and releasing the line. Since the wire gauge structure needs to be set at the front end of the water drop reel, a crossbeam is set at the front end of the water drop reel shell to protect the wire gauge structure through this crossbeam located in front of the wire gauge structure.

[0004] Among them, the Chinese patent application with application number CN202210670448.9 disclosed: "A reel and wire guide device, applied to a water drop reel, comprising: a mounting frame, provided with a mounting position for accommodating a reel assembly; a wire ring, arranged on the mounting frame and located on one side of the mounting position, the wire ring being provided with a threading hole for the fishing line on the reel assembly to pass through; a key transmission mechanism, arranged on the mounting frame, comprising a key assembly and a transmission assembly, the transmission assembly being connected to the key assembly and the wire ring, so as to drive the wire ring to rotate under the action of the key assembly, thereby adjusting the angle of the threading hole in the wire ring relative to the reel assembly, so as to increase the active area of the fishing line in the threading hole when the water drop reel is in the line-out state, thereby reducing the friction between the fishing line and the inner wall of the threading hole, and reducing the active area of the fishing line when in the line-reeling state. Also disclosed are a water drop reel and fishing gear having the above-mentioned reel and wire guide device".

[0005] In the prior art, there are roughly two ways to set the crossbeam on the water drop wheel shell. One of them is the solution described in the above patent, in which the crossbeam is assembled separately on the water drop wheel shell. The other setting method different from the solution recorded in the above patent is that the crossbeam is integrally formed with the water drop wheel shell. Compared with the solution in which the crossbeam is set separately, the advantage of the one-piece crossbeam solution is that the water drop wheel shell has a strong integrity. After the entire water drop wheel is assembled, its integrity and stability are significantly stronger. The disadvantage of the one-piece crossbeam solution is also obvious, that is, the suspension and the crossbeam at the front of the water drop wheel shell will greatly increase the difficulty of processing the entire water drop wheel shell.

[0006] There are two existing processing methods for the water drop wheel shell with an integrally formed crossbeam. One is machining, and the other is die-casting, injection molding or metal powder injection molding through a mold. Machining is not suitable for mass production due to its low efficiency, and the crossbeam on the water drop wheel shell formed by the mold is integrally formed. The water drop wheel shell processed by the existing mold has a crossbeam that cannot be well supported and restricted in the mold and is prone to skew, resulting in a low yield rate of the processed water drop wheel shell. In addition, the surface of the crossbeam on the water drop wheel shell processed by the existing mold will have a large number of burrs, which requires a long time to polish to meet the standards, resulting in low production efficiency. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art in which a water drop wheel shell with an integrally formed crossbeam has a low yield after being processed and formed by a mold and requires a large amount of subsequent polishing, the utility model provides a mold for a water drop wheel shell and a water drop wheel shell blank thereof.

[0008] The utility model solves the technical problem with a technical solution of: a mold for a water drop wheel shell, comprising a bottom mold, an upper mold and a plurality of side molds;

[0009] The bottom mold, the upper mold and the plurality of side molds together form a molding cavity for the water drop wheel shell blank; the side molds at least include a front mold and a rear mold, the front mold is inserted transversely from the front side between the bottom mold and the upper mold, and the rear mold is inserted transversely from the rear side between the bottom mold and the upper mold opposite to the front mold;

[0010] The inner end of the front mold is convexly provided with two transversely arranged front molding columns, which are distributed on the left and right, and a molding groove is left between the two front molding columns. The inner end of the rear mold is convexly provided with a transversely arranged rear top molding column, which transversely penetrates the entire molding cavity and is inserted into the molding groove. A first gap is left between the top of the rear top molding column and the bottom of the molding groove. The first gap is part of the molding cavity and is used for forming the crossbeam on the water drop wheel shell blank.

[0011] Furthermore, the molding cavity includes a main body cavity and a crossbeam cavity that are connected to each other. The main body cavity is used for main body molding of the water drop wheel shell blank, and the crossbeam cavity is used for crossbeam molding of the water drop wheel shell blank.

[0012] The crossbeam cavity includes a forming section and connecting sections located on both sides of the forming section. The crossbeam cavity is connected with the main body cavity through the connecting sections. The forming section is composed of a first gap.

[0013] Furthermore, a front forming portion is convexly provided on the inner end of the front mold, and the front forming portion is located on the front side of the molding cavity after the mold is closed, so that the front forming portion is used to form the front side structure on the water drop wheel shell blank, and the front column is protruding from the front forming portion; a rear forming portion is convexly provided on the inner end of the rear mold, and the rear forming portion is located on the rear side of the molding cavity after the mold is closed, so that the rear forming portion is used to form the rear side structure on the water drop wheel shell blank, and the rear top column is protruding from the rear forming portion.

[0014] Furthermore, the side mold also includes a left mold and a right mold; the left mold is inserted laterally from the left side between the bottom mold and the upper mold, and the inner end of the left mold is convexly provided with a left molding part, and the left molding part is located on the left side of the molding cavity after the mold is closed, so that the left molding part is used for molding the left side structure on the water drop wheel shell blank; the right mold is inserted laterally from the right side between the bottom mold and the upper mold, and the inner end of the right mold is convexly provided with a right molding part, and the right molding part is located on the right side of the molding cavity after the mold is closed, so that the right molding part is used for molding the right side structure on the water drop wheel shell blank.

[0015] Furthermore, the left forming part also includes two laterally protruding left profile columns, and one of the left profile columns is located above the front profile column, and the other left profile column is located below the front profile column, so that the front profile column is clamped between the two left profile columns, and a second gap is left between the front side surface of the left profile column and the front forming part, and the connecting section of the beam cavity is composed of the second gap.

[0016] Furthermore, the bottom mold and the upper mold are both provided with side mold grooves. When the bottom mold and the upper mold are closed, the side mold grooves on the bottom mold and the side mold grooves on the lower mold are combined to form side mold holes. The side molds are inserted into the side mold holes to form an enclosure with the bottom mold and the upper mold.

[0017] Furthermore, a lower forming part is convexly provided on the inner side of the bottom mold, and the lower forming part is located at the bottom of the forming cavity after the mold is closed, so that the lower forming part is used to form the lower side structure of the water drop wheel shell blank; an upper forming part is convexly provided on the inner side of the upper mold, and the upper forming part is located at the top of the forming cavity after the mold is closed, so that the upper forming part is used to form the upper side structure of the water drop wheel shell blank.

[0018] Furthermore, it also includes a lower core column, which is longitudinally inserted on the bottom mold from bottom to top, and the inner end of the lower core column longitudinally passes through the lower forming part and is longitudinally cut in the main body cavity, so that a lower hole can be formed in the center of the lower side structure of the water drop wheel shell blank when the water drop wheel shell blank is formed, and a cavity is formed in the middle of the main body when the water drop wheel shell blank is formed; the side surface of the inner end of the lower core column is also provided with an avoidance hole for avoiding the rear top column, and the rear top column is matched with the front side mold after passing through the avoidance hole.

[0019] Furthermore, an upper core column is included, which is longitudinally inserted into the top mold from top to bottom, and the inner end of the upper core column longitudinally passes through the upper forming part and extends into the main body cavity, so that an upper hole can be formed at the upper side structure of the water drop wheel shell blank when it is formed.

[0020] The present invention also includes a water drop wheel shell blank, which is processed and formed by the above-mentioned mold, and the water drop wheel shell blank includes a main body and a crossbeam integrally formed on the front side of the main body; the main body further includes a front side structure, a rear side structure, an upper side structure, a lower side structure, a left side structure and a right side structure, and the main body also includes a cavity that passes through from front to back, the lower side structure includes a lower hole connected to the cavity, and the upper side structure includes two upper holes connected to the cavity; the two ends of the crossbeam are connected to the upper side structure and the lower side structure of the main body.

[0021] The beneficial effects of the present invention are:

[0022] 1. The molding cavity in the mold contains a first gap, which is dedicated to the forming of the crossbeam on the water drop wheel shell blank. The first gap is formed by the front column on the front side mold and the rear top column on the rear side mold. Therefore, during the forming process of the crossbeam, the crossbeam is limited and formed from the front and rear directions. As a result, the position accuracy and forming degree of the crossbeam on the processed water drop wheel shell blank are higher, and the formed crossbeam does not require excessive grinding.

[0023] 2. It includes a bottom mold, an upper mold, and four side molds, front, back, left, and right. Each part is used to complete the molding of the structure on one side of the water drop wheel shell blank, so that the processed water drop wheel shell blank already has the required various structures, which can effectively reduce the subsequent finishing of the water drop wheel shell blank and greatly improve the overall efficiency of water drop wheel production;

[0024] 3. A lower core column is provided on the bottom die, and an upper core column is provided on the upper die. Thus, the upper and lower holes on the water drop wheel shell blank and the cavity on the water drop wheel shell blank can be formed during the processing through the upper and lower core columns, thereby avoiding the need to drill the water drop wheel shell blank after processing and forming, further improving the processing efficiency of the water drop wheel shell blank;

[0025] 4. The precise coordination between the bottom mold, the upper mold, and the four side molds on the front, back, left and right sides can accurately process and shape the water drop wheel shell blank, while also effectively reducing the number of burrs on various parts of the water drop wheel shell blank, thereby reducing material waste and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of embodiment 1 of the present utility model.

[0027] Figure 2 It is an explosion diagram of the first embodiment of the present invention.

[0028] Figure 3 It is a cross-sectional view of embodiment 1 of the present utility model.

[0029] Figure 4 yes Figure 3 Enlarged schematic diagram of point A in the middle.

[0030] Figure 5 It is a schematic diagram of the coordination of the front side mold and the rear side mold in the first embodiment of the present invention.

[0031] Figure 6 It is a schematic diagram of the cooperation between the front side mold and the left side mold in the first embodiment of the present invention.

[0032] Figure 7 It is a schematic diagram of the coordination of the front side mold, the rear side mold and the left side mold in the first embodiment of the present invention.

[0033] Figure 8 It is a cross-sectional view of the cooperation of the front side mold, the rear side mold and the left side mold in the first embodiment of the present invention.

[0034] Figure 9 It is a structural schematic diagram of the bottom mold in Example 1 of the present utility model.

[0035] Figure 10 It is a structural schematic diagram of the upper mold in Example 1 of the present utility model.

[0036] Figure 11 It is a structural diagram of the second embodiment of the present utility model.

[0037] Figure 12 It is a structural schematic diagram of another angle of embodiment 2 of the present invention.

[0038] Numbers in the figure: 1, bottom mold; 2, upper mold; 3, molding cavity; 4, main body mold cavity; 5, crossbeam mold cavity; 6, molding section; 7, connecting section; 8, front mold; 9, rear mold; 10, front column; 11, molding groove; 12, rear top column; 13, first gap; 14, front molding part; 15, rear molding part; 16, left mold; 17, right mold; 18, left molding part; 19, right molding part; 20, left column; 21, second Gap; 22. Side mold groove; 23. Side mold hole; 24. Lower forming part; 25. Lower core column; 26. Avoidance hole; 27. Upper forming part; 28. Upper core column; 100. Main body; 101. Crossbeam; 102. Front structure; 103. Rear structure; 104. Upper structure; 105. Lower structure; 106. Left structure; 107. Right structure; 108. Cavity; 109. Lower hole; 110. Upper hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be understood that although terms such as upper, middle, lower, top, end, etc. appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for ease of understanding, and are not used to define any direction or order limitation.

[0041] Example 1

[0042] Combine Figures 1 to 10 The mold for the water drop wheel shell shown in the figure includes a bottom mold 1, an upper mold 2 and several side molds; the bottom mold 1, the upper mold 2 and the several side molds together form a forming cavity 3 of the water drop wheel shell blank; the side molds include at least a front mold 8 and a rear mold 9, the front mold 8 is inserted horizontally from the front side between the bottom mold 1 and the upper mold 2, and the rear mold 9 is inserted horizontally from the rear side opposite to the front mold 8 between the bottom mold 1 and the upper mold 2; the inner end of the front mold 8 is convexly provided with two grooves The two front molding columns 10 are arranged horizontally, and the two molding columns are distributed on the left and right, and a molding groove 11 is left between the two front molding columns 10. The inner end of the rear mold 9 is convexly provided with a horizontally arranged rear top column 12. The rear top column 12 horizontally penetrates the entire molding cavity 3 and is inserted into the molding groove 11. A first gap 13 is left between the top of the rear top column 12 and the bottom of the molding groove 11. The first gap 13 is part of the molding cavity 3 and is used for forming the upper crossbeam 101 of the water drop wheel shell blank.

[0043] Combine Figure 3 、 Figure 4 and Figure 8 As shown, in this embodiment, the molding cavity 3 includes a main body cavity 4 and a beam cavity 5 that are connected. The main body cavity 4 is used to mold the main body 100 of the water drop wheel shell blank, and the beam cavity 5 is used to mold the beam 101 of the water drop wheel shell blank; the beam cavity 5 includes a molding section 6 and a connecting section 7 located on both sides of the molding section 6. The beam cavity 5 is connected with the main body cavity 4 through the connecting section 7, and the molding section 6 is composed of a first gap 13.

[0044] Combine Figure 2 and Figure 5As shown, in this embodiment, the inner end of the front mold 8 is protruded with a front forming portion 14, and the front forming portion 14 is located on the front side of the molding cavity 3 after the mold is closed, so that the front forming portion 14 is used to form the front side structure 102 on the water drop wheel shell blank, and the front column 10 is protruded from the front forming portion 14; the inner end of the rear mold 9 is protruded with a rear forming portion 15, and the rear forming portion 15 is located on the rear side of the molding cavity 3 after the mold is closed, so that the rear forming portion 15 is used to form the rear side structure 103 on the water drop wheel shell blank, and the rear top column 12 is protruded from the rear forming portion 15.

[0045] Combine Figure 2 and Figure 3 As shown, the side mold described in this embodiment also includes a left mold 16 and a right mold 17; the left mold 16 is laterally inserted between the bottom mold 1 and the upper mold 2 from the left side, and the inner end of the left mold 16 is protruded with a left molding portion 18, and the left molding portion 18 is located on the left side of the molding cavity 3 after the mold is closed, so that the left molding portion 18 is used to mold the left side structure 106 on the water drop wheel shell blank; the right mold 17 is laterally inserted between the bottom mold 1 and the upper mold 2 from the right side, and the inner end of the right mold 17 is protruded with a right molding portion 19, and the right molding portion 19 is located on the right side of the molding cavity 3 after the mold is closed, so that the right molding portion 19 is used to mold the right side structure 107 on the water drop wheel shell blank.

[0046] Combine Figures 6 to 8 As shown, in this embodiment, the left forming portion 18 also includes two laterally protruding left profile columns 20, and one of the left profile columns 20 is located above the front profile column 10, and the other left profile column 20 is located below the front profile column 10, so that the front profile column 10 is sandwiched between the two left profile columns 20, and a second gap 21 is left between the front side surface of the left profile column 20 and the front forming portion 14, and the connecting section 7 of the beam cavity 5 is formed by the second gap 21.

[0047] Combine Figure 9 and Figure 10 As shown, in this embodiment, the bottom mold 1 and the upper mold 2 are both provided with side mold grooves 22. When the bottom mold 1 and the upper mold 2 are closed, the side mold grooves 22 on the bottom mold 1 and the side mold grooves 22 on the lower mold are combined to form side mold holes 23. The side molds are inserted into the side mold holes 23 to form an enclosure with the bottom mold 1 and the upper mold 2.

[0048] Combine Figure 9 and Figure 10As shown, in this embodiment, a lower molding portion 24 is convexly provided on the inner side of the bottom mold 1, and the lower molding portion 24 is located at the bottom of the molding cavity 3 after the mold is closed, so that the lower molding portion 24 is used to mold the lower side structure 105 of the water drop wheel shell blank; an upper molding portion 27 is convexly provided on the inner side of the upper mold 2, and the upper molding portion 27 is located at the top of the molding cavity 3 after the mold is closed, so that the upper molding portion 27 is used to mold the upper side structure 104 of the water drop wheel shell blank.

[0049] Among them Figure 2 As shown in , in this embodiment, a lower core column 25 is also included, and the lower core column 25 is longitudinally inserted on the bottom mold 1 from bottom to top, and the inner end of the lower core column 25 longitudinally passes through the lower molding portion 24 and is longitudinally cut in the main body cavity 4, so that a lower hole 109 can be formed at the center of the lower side structure 105 of the water drop wheel shell blank when the water drop wheel shell blank is formed, and a cavity 108 is formed in the middle of the main body 100 when the water drop wheel shell blank is formed; the side surface of the inner end of the lower core column 25 is also provided with an avoidance hole 26 for avoiding the rear top column 12, and the rear top column 12 is matched with the front side mold after passing through the avoidance hole 26.

[0050] Among them Figure 2 As shown in , in this embodiment, an upper core column 28 is also included. The upper core column 28 is longitudinally inserted on the top mold from top to bottom, and the inner end of the upper core column 28 longitudinally passes through the upper molding portion 27 and extends into the main body cavity 4, so that an upper hole 110 can be formed at the upper side structure 104 of the water drop wheel shell blank when it is molded.

[0051] In this embodiment, the mold can be used for injection molding, die casting and metal powder injection molding.

[0052] The advantages of this embodiment are: the beam forming on the water drop wheel shell blank is accurately realized through the beam cavity, the yield rate of the water drop wheel shell blank at the forming point is improved, and the beam on the water drop wheel shell does not need to be polished too much after forming.

[0053] Example 2

[0054] Reference Figure 11 and Figure 12As shown, this embodiment includes a water drop wheel shell blank, which is processed and formed by the mold in the above-mentioned embodiment 1, and the water drop wheel shell blank includes a main body 100 and a crossbeam 101 integrally formed on the front side of the main body 100; the main body 100 also includes a front side structure 102, a rear side structure 103, an upper side structure 104, a lower side structure 105, a left side structure 106 and a right side structure 107, and the main body 100 also includes a front-to-back through-cavity 108, the lower side structure 105 includes a lower hole 109 connected to the cavity 108, and the upper side structure 104 includes two upper holes 110 connected to the cavity 108; the two ends of the crossbeam 101 are connected to the upper side structure 104 and the lower side structure 105 of the main body 100.

[0055] The advantage of this embodiment is that the water drop wheel shell blank is integrally formed by the mold in Example 1, and after processing, the side structures on the blank are formed, which can effectively reduce the subsequent processing steps of the blank and effectively simplify the production process of the water drop wheel shell blank.

[0056] The above specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A mold for a water drop wheel housing, characterized by: It comprises a bottom mold (1), an upper mold (2) and a plurality of side molds; The bottom mold (1), the upper mold (2) and a plurality of side molds enclose a molding cavity (3) of a water drop wheel shell blank; the side molds at least include a front mold (8) and a rear mold (9); the front mold (8) is inserted transversely from the front side between the bottom mold (1) and the upper mold (2); and the rear mold (9) is inserted transversely from the rear side between the bottom mold (1) and the upper mold (2) opposite to the front mold (8); The inner end of the front mold (8) is convexly provided with two transversely arranged front molding columns (10), the two molding columns are distributed on the left and right, and a molding groove (11) is left between the two front molding columns (10); the inner end of the rear mold (9) is convexly provided with a transversely arranged rear top pillar (12), the rear top pillar (12) transversely penetrates the entire molding cavity (3) and is inserted into the molding groove (11), and a first gap (13) is left between the top of the rear top pillar (12) and the bottom of the molding groove (11), and the first gap (13) is a part of the molding cavity (3) and is used for molding the upper crossbeam (101) of the water drop wheel shell blank.

2. The mold for a water drop wheel housing according to claim 1, characterized in that: The molding cavity (3) comprises a main body molding cavity (4) and a crossbeam molding cavity (5) which are connected to each other. The main body molding cavity (4) is used for molding the main body (100) of the water drop wheel shell blank, and the crossbeam molding cavity (5) is used for molding the crossbeam (101) of the water drop wheel shell blank. The crossbeam cavity (5) includes a forming section (6) and connecting sections (7) located on both sides of the forming section (6). The crossbeam cavity (5) is connected to the main body cavity (4) through the connecting section (7). The forming section (6) is composed of a first gap (13).

3. The mold for the water drop wheel housing according to claim 2, characterized in that: The inner end of the front mold (8) is provided with a front forming portion (14) protruding therefrom. The front forming portion (14) is located at the front side of the forming cavity (3) after the mold is closed, so that the front forming portion (14) is used for forming the front structure (102) on the water drop wheel shell blank, and the front column (10) is protruding from the front forming portion (14); the inner end of the rear mold (9) is provided with a rear forming portion (15) protruding therefrom. The rear forming portion (15) is located at the rear side of the forming cavity (3) after the mold is closed, so that the rear forming portion (15) is used for forming the rear structure (103) on the water drop wheel shell blank, and the rear top column (12) is protruding from the rear forming portion (15).

4. The mold for a water drop wheel housing according to claim 3, characterized in that: The side mold further comprises a left mold (16) and a right mold (17); the left mold (16) is inserted transversely from the left side between the bottom mold (1) and the upper mold (2); the inner end of the left mold (16) is provided with a left molding portion (18); the left molding portion (18) is located on the left side of the molding cavity (3) after the mold is closed, so that the left molding portion (18) is used to mold the left side structure (106) on the water drop wheel shell blank; the right mold (17) is inserted transversely from the right side between the bottom mold (1) and the upper mold (2); the inner end of the right mold (17) is provided with a right molding portion (19); the right molding portion (19) is located on the right side of the molding cavity (3) after the mold is closed, so that the right molding portion (19) is used to mold the right side structure (107) on the water drop wheel shell blank.

5. The mold for the water drop wheel housing according to claim 4, characterized in that: The left forming portion (18) further includes two transversely protruding left profile columns (20), one of which is located above the front profile column (10) and the other is located below the front profile column (10), so that the front profile column (10) is sandwiched between the two left profile columns (20), and a second gap (21) is left between the front side surface of the left profile column (20) and the front forming portion (14), and the connecting section (7) of the crossbeam cavity (5) is formed by the second gap (21).

6. The mold for a water drop wheel housing according to claim 1, characterized in that: The bottom mold (1) and the upper mold (2) are both provided with side mold grooves (22). When the bottom mold (1) and the upper mold (2) are closed, the side mold grooves (22) on the bottom mold (1) and the side mold grooves (22) on the lower mold are combined to form side mold holes (23). The side molds are inserted into the side mold holes (23) to form a closed area with the bottom mold (1) and the upper mold (2).

7. The mold for a water drop wheel housing according to claim 2, characterized in that: The bottom mold (1) is provided with a lower molding portion (24) convexly on its inner side. The lower molding portion (24) is located at the bottom of the molding cavity (3) after the mold is closed, so that the lower molding portion (24) is used to mold the lower side structure (105) of the water drop wheel shell blank; the upper molding portion (27) is provided with a upper molding portion (27) convexly on its inner side. The upper molding portion (27) is located at the top of the molding cavity (3) after the mold is closed, so that the upper molding portion (27) is used to mold the upper side structure (104) of the water drop wheel shell blank.

8. The mold for a water drop wheel housing according to claim 7, characterized in that: The invention also includes a lower core column (25), which is longitudinally inserted into the bottom mold (1) from bottom to top, and the inner end of the lower core column (25) longitudinally passes through the lower molding portion (24) and is longitudinally cut into the main body cavity (4), so that a lower hole (109) can be formed at the center of the lower side structure (105) of the water drop wheel shell blank when the water drop wheel shell blank is molded, and a cavity (108) is formed in the middle of the main body (100) when the water drop wheel shell blank is molded; the side surface of the inner end of the lower core column (25) is also provided with an avoidance hole (26) for avoiding the rear top column (12), and the rear top column (12) is matched with the front mold after passing through the avoidance hole (26).

9. The mold for a water drop wheel housing according to claim 7, characterized in that: The invention also includes an upper core column (28), which is longitudinally inserted into the top mold from top to bottom, and the inner end of the upper core column (28) longitudinally passes through the upper molding portion (27) and extends into the main body cavity (4), so that an upper hole (110) can be formed at the upper side structure (104) of the water drop wheel shell blank when the water drop wheel shell blank is molded.

10. A water drop wheel housing blank, characterized by: It is processed and formed by the mold described in any one of the above claims 1 to 9, and the water drop wheel shell blank includes a main body (100) and a crossbeam (101) integrally formed on the front side of the main body (100); the main body (100) further includes a front side structure (102), a rear side structure (103), an upper side structure (104), a lower side structure (105), a left side structure (106) and a right side structure (107), and the main body (100) also includes a cavity (108) that passes through from front to back, the lower side structure (105) includes a lower hole (109) connected to the cavity (108), and the upper side structure (104) includes two upper holes (110) connected to the cavity (108); the two ends of the crossbeam (101) are connected to the upper side structure (104) and the lower side structure (105) of the main body (100).

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