A mold for casting a wear-resistant water pump housing

Abstract

The utility model relates to a mold for casting a wear-resistant water pump housing, including a water pump housing and a wax casting core mold, the water pump housing including a longitudinal and cylindrical ring-shaped housing seat, the inner walls of the front and rear ends of the housing seat are respectively formed with annular retaining rings, the wax casting core mold includes a mandrel inserted in the housing seat, the outer wall of the rear end of the mandrel is formed with a circular annular rear positioning baffle, the rear positioning baffle is inserted in the retaining ring on the rear side of the housing seat and abuts against the inner wall of the retaining ring; a plurality of arc-shaped main lining plates are respectively arranged around the mandrel, and arc-shaped secondary lining plates are inserted between adjacent main lining plates, the side walls on both sides of the secondary lining plates are parallel and respectively abut against the side walls of adjacent main lining plates, and the outer walls of the secondary lining plates and the outer walls of the main lining plates respectively abut against the inner wall of the housing seat. The core mold for casting is designed as a split structure, which can be decomposed and folded after the wax casting is completed, and then can be pulled out from the retaining ring of the wax mold to achieve separation from the wax mold.

Description

Technical field:

[0001] The utility model relates to the technical field of water pump casing casting moulds, and more specifically to a casting mould for a wear-resistant water pump casing. Background technology:

[0002] At present, the water pump housing is generally obtained by casting combined with machining. There is a water pump housing on the market, the structure of which is shown in the attached figure Figure 1 As shown, its main body is a cylindrical ring-shaped shell seat 11, and a longitudinal rib plate 13 and a transverse rib plate 14 are respectively formed on the outer wall of the lower end of the shell seat 11, and a horizontal mounting bottom plate 15 is formed at the lower ends of the longitudinal rib plate 13 and the transverse rib plate 14. A rectangular ring-shaped connecting seat 12 is formed on the outer wall of the upper end of the shell seat 11, and the connecting seat 12 is connected to the inner cavity of the shell seat 11, and a rectangular ring-shaped connecting edge 16 is provided on the top of the connecting seat 12. At the same time, in order to facilitate installation and connection, annularly distributed threaded bottom holes 19 are respectively provided on the front and rear end surfaces of the shell seat 11. In order to improve the sealing performance, retaining rings 17 are respectively formed on the front and rear ends of the shell seat 11, and an annular sealing groove 18 is machined on the outer end surface of the retaining ring 17; the sealing groove 18 and the threaded bottom hole 19 can be machined after the shell casting is cast;

[0003] Before casting the shell casting, it is necessary to make a wax mold that is consistent with the shape of the shell casting. Therefore, the front and rear ends of the wax mold also have the above-mentioned retaining ring structure. The retaining ring will affect the core pulling of the core mold on the wax mold mold, that is, the outer wall of the existing core mold needs to fit with the inner wall of the shell seat 11. After the casting is completed, the wax mold retaining ring will interfere with the removal of the core mold from the wax mold, so it is necessary to design a removable core mold for wax mold casting. Utility model content:

[0004] The purpose of the utility model is to address the deficiencies of the prior art and to provide a mold for casting a wear-resistant water pump housing. The core mold is a split structure. After the wax mold casting is completed, it can be decomposed and folded, and then it can be pulled out from the retaining ring of the wax mold to achieve separation from the wax mold.

[0005] A mold for casting a wear-resistant water pump housing, comprising a water pump housing and a wax casting core mold, wherein the water pump housing comprises a longitudinal and cylindrical ring-shaped housing seat, and annular retaining rings are formed on the inner walls of the front and rear ends of the housing seat, respectively; the wax casting core mold comprises a mandrel inserted in the housing seat, and an annular rear positioning baffle is formed on the outer wall of the rear end of the mandrel, and the rear positioning baffle is inserted in the retaining ring on the rear side of the housing seat and abuts against the inner wall of the retaining ring; a plurality of arc-shaped main lining plates are respectively arranged around the mandrel, and an arc-shaped secondary lining plates are inserted between adjacent main lining plates, and the side walls on both sides of the secondary lining plates are parallel and respectively abut against the side walls of adjacent main lining plates, and the outer walls of the secondary lining plates and the outer walls of the main lining plates respectively abut against the inner wall of the housing seat;

[0006] A plurality of waist-shaped step holes are formed on the rear end surface of the rear positioning baffle, a limiting slider is inserted into the step hole, a longitudinal D-shaped pin is inserted and fixed on the limiting slider, the front end of the D-shaped pin passes through the step hole and is inserted and fixed on the main lining plate, and the rear end surface of the main lining plate abuts against the front end surface of the rear positioning baffle; the rear end surface of the secondary lining plate abuts against the front end surface of the rear positioning baffle and is formed with an arc-shaped limiting ear plate, a plurality of limiting slots are formed on the rear positioning baffle, the limiting ear plates are respectively inserted into the limiting slots of the rear positioning baffle and are inserted with guide shafts, and the two ends of the guide shaft are respectively inserted and fixed on the rear positioning baffle;

[0007] The front end faces of the main lining plate and the secondary lining plate respectively abut against the annular front positioning baffle, which is inserted on the core shaft and inserted in the retaining ring on the front side of the shell seat; a plurality of arc-shaped main clamping plates and secondary clamping plates are formed on the rear end face of the front positioning baffle, and the outer walls of the main clamping plates and the secondary clamping plates are respectively pressed against the inner walls of the main lining plate and the secondary lining plate.

[0008] Preferably, the front and rear end faces of the main lining plate and the secondary lining plate respectively abut against the inner end faces of the front and rear side retaining rings of the shell seat, the outer walls of the main lining plate and the secondary lining plate are in the same cylindrical surface, the radius of the inner wall of the secondary lining plate is larger than the radius of the inner wall of the main lining plate, the radius of the inner wall of the main lining plate is larger than the radius of the outer wall of the core shaft, and a center hole is formed on the core shaft.

[0009] Preferably, there are three main lining plates, and the main lining plates and the secondary lining plates are evenly distributed in a ring shape around the central axis of the core shaft.

[0010] Preferably, a plurality of arcuate grooves facing the secondary lining plate are formed on the outer wall of the core shaft, the groove width of the arcuate groove is not less than the spacing between the side walls of the secondary lining plate, and the rear end of the arcuate groove is connected to the limiting slot.

[0011] Preferably, the front end of the mandrel extends out of the front positioning baffle, the outer wall of the front positioning baffle and the outer wall of the rear positioning baffle are in the same cylindrical surface, and the thickness of the front positioning baffle and the thickness of the rear positioning baffle are respectively greater than the thickness of the retaining ring.

[0012] Preferably, the outer end faces of the retaining rings on the front and rear sides of the housing seat are flush with the front and rear end faces of the housing seat respectively.

[0013] Preferably, the main clamping plate and the secondary clamping plate are evenly distributed in a ring shape around the central axis of the core shaft, and the ends of the secondary clamping plate and the main clamping plate are respectively formed with conical guide pieces.

[0014] Preferably, the limiting ear plate on the secondary lining plate extends out of the rear end face of the rear positioning baffle plate; and a buckle groove is formed on the front end face of the main lining plate.

[0015] The beneficial effects of the utility model are:

[0016] The core mold used for casting is designed as a split structure. After the wax mold casting is completed, it can be decomposed and folded, and then it can be pulled out from the retaining ring of the wax mold to achieve separation from the wax mold. Description of the drawings:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model from the side;

[0019] Figure 3 It is a half-section schematic diagram of the utility model in the side view direction;

[0020] Figure 4 for Figure 2 Schematic cross-sectional view at AA in the middle;

[0021] Figure 5 It is a three-dimensional schematic diagram of a part of the inner wax mold casting core mold of the utility model.

[0022] In the figure: 1. Water pump housing; 11. Housing seat; 12. Connecting seat; 13. Longitudinal rib plate; 14. Transverse rib plate; 15. Mounting base plate; 16. Connecting edge; 17. Retaining ring; 18. Sealing groove; 19. Threaded bottom hole; 2. Wax casting core mold; 21. Mandrel; 22. Main lining plate; 23. Secondary lining plate; 24. Guide shaft; 25. Front positioning baffle plate; 26. Limiting slider; 27. D-type pin shaft. Specific implementation method:

[0023] Example: See Figures 1 to 5 As shown, a mold for casting a wear-resistant water pump housing comprises a water pump housing 1 and a wax casting core mold 2, wherein the water pump housing 1 comprises a longitudinal and cylindrical ring-shaped housing seat 11, and an annular retaining ring 17 is formed on the inner walls of the front and rear ends of the housing seat 11, respectively; the wax casting core mold 2 comprises a core shaft 21 inserted in the housing seat 11, and an annular rear positioning baffle 211 is formed on the outer wall of the rear end of the core shaft 21, and the rear positioning baffle 211 is inserted in the retaining ring 17 on the rear side of the housing seat 11 and abuts against the inner wall of the retaining ring 17; a plurality of arc-shaped main lining plates 22 are respectively arranged around the core shaft 21, and an arc-shaped secondary lining plates 23 are inserted between adjacent main lining plates 22, and the side walls on both sides of the secondary lining plates 23 are parallel and respectively abut against the side walls of the adjacent main lining plates 22, and the outer wall of the secondary lining plate 23 and the outer wall of the main lining plate 22 respectively abut against the inner wall of the housing seat 11;

[0024] A plurality of waist-shaped step holes 214 are formed on the rear end face of the rear positioning baffle 211, and a limiting slider 26 is inserted into the step hole 214. A longitudinal D-shaped pin shaft 27 is inserted and fixed on the limiting slider 26. The front end of the D-shaped pin shaft 27 passes through the step hole 214 and is inserted and fixed on the main lining plate 22. The rear end face of the main lining plate 22 abuts against the front end face of the rear positioning baffle 211; the rear end face of the secondary lining plate 23 abuts against the front end face of the rear positioning baffle 211 and is formed with an arc-shaped limiting ear plate 231. A plurality of limiting slots 213 are formed on the rear positioning baffle 211. The limiting ear plates 231 are respectively inserted into the limiting slots 213 of the rear positioning baffle 211 and are inserted with guide shafts 24. The two ends of the guide shaft 24 are respectively inserted and fixed on the rear positioning baffle 211;

[0025] The front end faces of the main lining plate 22 and the secondary lining plate 23 respectively abut against the annular front positioning baffle 25, which is inserted on the core shaft 21 and inserted in the retaining ring 17 on the front side of the shell seat 11; a plurality of arc-shaped main clamping plates 251 and secondary clamping plates 252 are formed on the rear end face of the front positioning baffle 25, and the outer walls of the main clamping plates 251 and the secondary clamping plates 252 are pressed against the inner walls of the main lining plate 22 and the secondary lining plate 23 respectively.

[0026] The front and rear end faces of the main lining plate 22 and the secondary lining plate 23 respectively abut against the inner end faces of the front and rear side retaining rings 17 of the shell seat 11, and the outer walls of the main lining plate 22 and the secondary lining plate 23 are in the same cylindrical surface. The radius of the inner wall of the secondary lining plate 23 is larger than the radius of the inner wall of the main lining plate 22, and the radius of the inner wall of the main lining plate 22 is larger than the radius of the outer wall of the core shaft 21. A center hole is formed on the core shaft 21; the side wall of the secondary lining plate 23 is parallel to the center axis of the D-shaped pin shaft 27.

[0027] The main lining plates 22 are provided in three pieces, and the main lining plates 22 and the secondary lining plates 23 are evenly distributed in a ring shape around the central axis of the core shaft 21 .

[0028] The outer wall of the core shaft 21 is formed with a plurality of arc grooves 212 which are directly opposite to the secondary lining plate 23. The groove width of the arc groove 212 is not less than the spacing between the side walls of the secondary lining plate 23. The rear end of the arc groove 212 is connected to the limiting slot 213. The arc groove 212 can be used to receive the secondary lining plate 23, that is, the secondary lining plate 23 is inserted into the arc groove 212, which will affect the folding of the main lining plate 22.

[0029] The front end of the mandrel 21 extends out of the front positioning baffle 25 , and the outer wall of the front positioning baffle 25 and the outer wall of the rear positioning baffle 211 are in the same cylindrical surface. The thickness of the front positioning baffle 25 and the thickness of the rear positioning baffle 211 are respectively greater than the thickness of the retaining ring 17 .

[0030] The outer end surfaces of the retaining rings 17 on the front and rear sides of the housing seat 11 are flush with the front and rear end surfaces of the housing seat 11 respectively.

[0031] The main clamping plate 251 and the secondary clamping plate 252 are evenly distributed in a ring shape around the central axis of the core shaft 21 , and conical guide pieces 253 are formed at the ends of the secondary clamping plate 252 and the main clamping plate 251 .

[0032] The limiting ear plate 231 on the secondary lining plate 23 extends out of the rear end surface of the rear positioning baffle 211 ; and a buckle groove 221 is formed on the front end surface of the main lining plate 22 .

[0033] Working principle: The utility model is a mold for casting a wear-resistant water pump housing. The technical point of the mold is reflected in the wax mold casting core mold 2, such as Figure 5 As shown, the secondary lining plate 23 and the primary lining plate 22 on the wax casting core mold 2 can form an annular inner mold sleeve, and the secondary lining plate 23 and the primary lining plate 22 are restricted from moving outward in the radial direction of the core shaft 21 based on the step hole 214 and the limiting slot 213, and the secondary lining plate 23 and the primary lining plate 22 are restricted from moving inward in the radial direction of the core shaft 21 by the primary clamping plate 251 and the secondary clamping plate 252 on the front positioning baffle 25;

[0034] After the casting of the wax mold is completed, the secondary lining plate 23 and the main lining plate 22 need to be removed from the retaining ring. At this time, first remove the front positioning baffle 25, and then move the secondary lining plate 23 first, move the secondary lining plate 23 toward the core shaft 21 and retract it, and then manually move the main lining plate 22 toward the core shaft 21, and then the secondary lining plate 23 and the main lining plate 22 can be retracted, and the core shaft 21 can be pulled out, and the secondary lining plate 23 and the main lining plate 22 can be taken out of the wax mold together.

[0035] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A mold for casting a wear-resistant water pump housing, comprising a water pump housing (1) and a wax casting core mold (2), wherein the water pump housing (1) comprises a longitudinal cylindrical ring-shaped housing seat (11), and annular retaining rings (17) are formed on the inner walls of the front and rear ends of the housing seat (11), characterized in that: The wax casting core mold (2) comprises a core shaft (21) inserted into a shell seat (11), and a circular ring-shaped rear positioning baffle (211) is formed on the outer wall of the rear end of the core shaft (21), and the rear positioning baffle (211) is inserted into a baffle ring (17) on the rear side of the shell seat (11) and abuts against the inner wall of the baffle ring (17); a plurality of arc-shaped main lining plates (22) are respectively arranged around the core shaft (21), and an arc-shaped secondary lining plate (23) is inserted between adjacent main lining plates (22), and the side walls on both sides of the secondary lining plate (23) are parallel and respectively abut against the side walls of adjacent main lining plates (22), and the outer wall of the secondary lining plate (23) and the outer wall of the main lining plate (22) respectively abut against the inner wall of the shell seat (11); A plurality of waist-shaped step holes (214) are formed on the rear end face of the rear positioning baffle (211), a limiting slider (26) is inserted into the step hole (214), a longitudinal D-shaped pin shaft (27) is inserted and fixed on the limiting slider (26), the front end of the D-shaped pin shaft (27) passes through the step hole (214) and is inserted and fixed on the main lining plate (22), and the rear end face of the main lining plate (22) abuts against the front end face of the rear positioning baffle (211); The rear end surface of the lining plate (23) abuts against the front end surface of the rear positioning baffle (211) and is formed with an arc-shaped limiting ear plate (231); a plurality of limiting slots (213) are formed on the rear positioning baffle (211); the limiting ear plates (231) are respectively inserted into the limiting slots (213) of the rear positioning baffle (211) and are inserted with a guide shaft (24); and both ends of the guide shaft (24) are respectively plugged and fixed on the rear positioning baffle (211); The front end faces of the main lining plate (22) and the secondary lining plate (23) respectively abut against a circular front positioning baffle (25), which is inserted on the core shaft (21) and inserted into a retaining ring (17) on the front side of the shell seat (11); a plurality of arc-shaped main clamping plates (251) and secondary clamping plates (252) are formed on the rear end face of the front positioning baffle (25), and the outer walls of the main clamping plates (251) and the secondary clamping plates (252) are pressed against the inner walls of the main lining plate (22) and the secondary lining plate (23) respectively.

2. The mold for casting a wear-resistant water pump housing according to claim 1, characterized in that: The front and rear end faces of the main lining plate (22) and the secondary lining plate (23) respectively abut against the inner end faces of the front and rear side retaining rings (17) of the shell seat (11); the outer walls of the main lining plate (22) and the secondary lining plate (23) are in the same cylindrical surface; the radius of the inner wall of the secondary lining plate (23) is greater than the radius of the inner wall of the main lining plate (22); the radius of the inner wall of the main lining plate (22) is greater than the radius of the outer wall of the core shaft (21); and a center hole is formed on the core shaft (21).

3. The mold for casting a wear-resistant water pump housing according to claim 2, characterized in that: The main lining plates (22) are provided in three pieces, and the main lining plates (22) and the secondary lining plates (23) are evenly distributed in a ring shape around the central axis of the core shaft (21).

4. The mold for casting a wear-resistant water pump housing according to claim 3, characterized in that: A plurality of arcuate grooves (212) facing the secondary lining plate (23) are formed on the outer wall of the core shaft (21), the groove width of the arcuate groove (212) is not less than the spacing between the side walls of the secondary lining plate (23), and the rear end of the arcuate groove (212) is connected to the limiting slot (213).

5. The mold for casting a wear-resistant water pump housing according to claim 1, characterized in that: The front end of the mandrel (21) extends out of the front positioning baffle (25), the outer wall of the front positioning baffle (25) and the outer wall of the rear positioning baffle (211) are in the same cylindrical surface, and the thickness of the front positioning baffle (25) and the thickness of the rear positioning baffle (211) are respectively greater than the thickness of the retaining ring (17).

6. The mold for casting a wear-resistant water pump housing according to claim 1, characterized in that: The outer end surfaces of the retaining rings (17) on the front and rear sides of the housing seat (11) are respectively flush with the front and rear end surfaces of the housing seat (11).

7. The mold for casting a wear-resistant water pump housing according to claim 1, characterized in that: The main clamping plate (251) and the secondary clamping plate (252) are evenly distributed in a ring shape around the central axis of the core shaft (21), and the ends of the secondary clamping plate (252) and the main clamping plate (251) are respectively formed with conical guide pieces (253).

8. The mold for casting a wear-resistant water pump housing according to claim 1, characterized in that: The limiting ear plate (231) on the secondary lining plate (23) extends out of the rear end surface of the rear positioning baffle plate (211); and a buckle groove (221) is formed on the front end surface of the primary lining plate (22).

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