Casting mold for forming engine piston

Abstract

The utility model discloses a casting mould for forming an engine piston, which comprises a lower mould and an upper mould, a casting block is embedded on the upper mould, a mould cavity is arranged inside the lower mould, a plurality of groups of heat dissipation hole channels are arranged at the top of the upper mould, a casting port is arranged on the upper surface of the casting block, and the casting port is communicated with the mould cavity. A protection mechanism is arranged on the upper mold, the protection mechanism comprises a cover plate, two groups of cover strips and two groups of convex blocks, and a rubber plate is fixedly arranged at the bottom of the cover plate; according to the casting mold, through the designed protection mechanism, when the casting mold is not used, the heat dissipation hole channels and the casting opening in the casting mold can be shielded and protected, and the situations that external dust and impurities enter the heat dissipation hole channels and the casting opening, consequently, the heat dissipation hole channels are blocked, and the dust and the impurities enter the casting mold through the casting opening are avoided; and the cooling stability of the casting mold and the casting effect on the piston are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting molds, and in particular relates to a casting mold for forming an engine piston. Background Art

[0002] The piston is a reciprocating component in the cylinder block of a car engine. A casting mold is a material that is made of other easily moldable materials in advance to obtain the structural shape of the component. The mold is then placed in a sand mold, forming a cavity with the same size as the component structure. A fluid liquid is then poured into the cavity, and after the liquid cools and solidifies, it can form a part with the same shape and structure as the mold. When casting a piston, it is cast using a casting mold.

[0003] The Chinese patent model 201920642849.7 discloses an aluminum alloy piston casting mold, which injects the casting liquid from the casting port in the mold, and then the liquid enters the mold cavity in the mold. After the liquid is cooled and formed, it is demolded to become a piston. During the cooling process, heat is dissipated through multiple heat dissipation channels to accelerate the cooling speed. When the above-mentioned casting mold is not in use, it will be placed on the ground aside. At this time, the heat dissipation channels and the casting port in the casting mold are directly exposed to the outside. External dust and impurities can easily enter the heat dissipation channels and cause blockage. Dust and impurities enter the casting mold through the casting port, resulting in dust, impurities and the injected liquid mixing in the subsequent casting process, affecting the quality of piston molding. For this reason, we propose a casting mold for engine piston molding. Utility Model Content

[0004] The utility model aims to provide a casting mold for forming an engine piston, so as to solve the problem proposed in the above-mentioned background technology that the mold is placed on the ground when not in use, and the heat dissipation channels and the casting port in the casting mold are directly exposed to the outside, and the external dust and impurities can easily enter the heat dissipation channels and cause blockage, and the dust and impurities can enter the casting mold through the casting port.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a casting mold for forming an engine piston, comprising a lower mold and an upper mold, a casting block is embedded in the upper mold, a mold cavity is opened inside the lower mold, a plurality of heat dissipation channels are opened on the top of the upper mold, a casting port is opened on the upper surface of the casting block, a protective mechanism is arranged on the upper mold, the protective mechanism comprises a cover plate, two groups of cover strips and two groups of convex blocks, a rubber plate is fixedly arranged at the bottom of the cover plate, a rubber strip is fixedly arranged at the bottom of the cover strip, the lower surface of the rubber strip is in contact with the heat dissipation channel, the lower surface of the rubber plate is in contact with the casting port, L-shaped strips are fixedly arranged between the two side surfaces of the cover plate and the cover strip, L-shaped frames are fixedly arranged on the front and back sides of the cover plate, a vertical groove is opened inside the convex block, the end of the L-shaped frame passes through the inside of the vertical groove, and a fixing piece for fixing the L-shaped frame is arranged on the convex block.

[0006] Preferably, the fixing member includes an insert plate and a fixing column, a groove is formed inside the convex block, a through groove is formed inside the L-shaped frame, and the working end of the insert plate passes through the groove and extends to the inside of the through groove.

[0007] Preferably, a movable plate is fixedly provided on the front side of the plug plate, a sliding hole is opened inside the movable plate, one end of the fixed column passes through the inside of the sliding hole, and the other end of the fixed column is fixed to the convex block.

[0008] Preferably, a fixing plate is fixedly disposed on the outside of one end of the fixing column, and a spring is fixedly disposed between the fixing plate and the movable plate.

[0009] Preferably, two groups of mounting parts for disassembling and assembling the convex block are arranged between the convex block and the upper mold, the mounting parts include studs and nut rings, a through groove is opened inside the convex block, and two groups of screw holes are opened on the front and back sides of the upper mold, and the ends of the studs pass through the through grooves and penetrate into the interiors of the screw holes.

[0010] Preferably, a base is fixedly provided at the bottom of the lower mold, and connecting plates are provided on the front and back sides of the upper mold and the lower mold. The connecting plates are fixedly connected to the upper mold and the lower mold by two sets of bolts.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The utility model has a protective mechanism designed to shield and protect the heat dissipation holes and the casting port on the casting mold when the casting mold is not in use, thereby preventing external dust and impurities from entering the heat dissipation holes and the casting port, causing the heat dissipation holes to become blocked, and dust and impurities from entering the casting mold through the casting port, thereby improving the cooling stability of the casting mold and the casting effect of the piston.

[0013] (2) The utility model has a designed mounting piece, so that the protective mechanism can be easily removed when the casting mold is in use, and the protective mechanism can be installed again when the casting mold is not in use later, so that it is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the protection mechanism structure of the utility model;

[0016] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0017] Figure 4 This is a schematic diagram of the protective mechanism of the utility model when viewed from above;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the L-shaped frame of the utility model;

[0019] Figure 6 This is a schematic diagram of the casting mold structure of the utility model;

[0020] In the figure: 100, base; 101, lower mold; 102, upper mold; 103, connecting plate; 104, casting port; 105, casting block; 106, heat dissipation channel; 200, L-shaped strip; 201, L-shaped frame; 202, cover plate; 203, cover strip; 204, convex block; 205, movable plate; 206, spring; 207, fixed column; 208, fixed plate; 209, plug plate; 210, rubber strip; 211, rubber plate; 212, through groove; 300, nut ring; 301, stud; 302, screw hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The utility model provides a technical solution: a casting mold for forming an engine piston, comprising a lower mold 101 and an upper mold 102, a casting block 105 is embedded in the upper mold 102, a mold cavity is provided inside the lower mold 101, a plurality of heat dissipation channels 106 are provided on the top of the upper mold 102, a casting port 104 is provided on the upper surface of the casting block 105, a molten liquid is cast into the mold cavity in the casting mold through the casting port 104, a protective mechanism is provided on the upper mold 102, the protective mechanism comprises a cover plate 202, two groups of cover strips 203 and two groups of convex blocks 204, a rubber plate 206 is fixedly provided at the bottom of the cover plate 202 11. The rubber sheet 211 can cover the casting port 104. The bottom of the cover strip 203 is fixedly provided with a rubber strip 210. The rubber strip 210 can cover the heat dissipation channel 106. The lower surface of the rubber strip 210 contacts the heat dissipation channel 106. The lower surface of the rubber sheet 211 contacts the casting port 104. L-shaped strips 200 are fixedly provided between the two side surfaces of the cover plate 202 and the cover strip 203. L-shaped frames 201 are fixedly provided on the front and back of the cover plate 202. A vertical groove is provided inside the convex block 204. The end of the L-shaped frame 201 passes through the inside of the vertical groove. The convex block 204 is provided with a fixing piece for fixing the L-shaped frame 201.

[0024] Example 2

[0025] Based on Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The fixing member includes a plug plate 209 and a fixing column 207. A groove is provided inside the convex block 204, and the groove is connected to the vertical groove. A through groove 212 is provided inside the L-shaped frame 201. The working end of the plug plate 209 passes through the groove and extends to the inside of the through groove 212.

[0026] A movable plate 205 is fixedly arranged on the front of the plug plate 209. A sliding hole is opened inside the movable plate 205. The movable plate 205 slides on the fixed column 207 through the sliding hole. One end of the fixed column 207 passes through the inside of the sliding hole, and the other end of the fixed column 207 is fixed on the convex block 204.

[0027] A fixing plate 208 is fixedly disposed on the outside of one end of the fixing column 207 , and a spring 206 is fixedly disposed between the fixing plate 208 and the movable plate 205 . The spring 206 can push the working end of the inserting plate 209 to be inserted into the through slot 212 .

[0028] The utility model adopts a protective mechanism designed to shield and protect the heat dissipation holes 106 and the casting port 104 on the casting mold when the casting mold is not in use, thereby preventing external dust and impurities from entering the heat dissipation holes 106 and the casting port 104, which would cause the heat dissipation holes 106 to become blocked, and dust and impurities to enter the casting mold through the casting port 104, thereby improving the cooling stability of the casting mold and the casting effect of the piston.

[0029] Example 3

[0030] Based on Example 2, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 Two groups of mounting parts for disassembling and assembling the convex block 204 are arranged between the convex block 204 and the upper mold 102, and the mounting parts include a stud 301 and a nut ring 300. The nut ring 300 and the stud 301 are connected by threads. A through groove is opened inside the convex block 204, and two groups of screw holes 302 are opened on the front and back sides of the upper mold 102. The end of the stud 301 passes through the through groove and penetrates into the interior of the screw hole 302.

[0031] The utility model adopts the designed mounting piece, and the protection mechanism can be conveniently disassembled when the casting mold is used, and the protection mechanism can be reinstalled when the casting mold is not used subsequently, so that it is convenient to use.

[0032] In this embodiment, a base 100 is fixedly provided at the bottom of the lower mold 101, and connecting plates 103 are provided on the front and back sides of the upper mold 102 and the lower mold 101. The connecting plates 103 are fixedly connected to the upper mold 102 and the lower mold 101 by two sets of bolts. The connecting plates 103 and the bolts can be used to connect and fix the upper mold 102 and the lower mold 101 together when the casting mold is not in use.

[0033] The working principle and use process of this utility model:

[0034] When the utility model is in use, when the casting mold is not in use, the cover plate 202, the cover strip 203, etc. in the protective mechanism are placed at a suitable position above the upper mold 102, and the bottom of the two groups of L-shaped frames 201 are aligned with the vertical groove in the lower convex block 204, and then the cover plate 202, the cover strip 203, etc. are moved downward, and then the bottom of the two groups of L-shaped frames 201 are inserted into the interior of the vertical groove. In the process of inserting into the vertical groove, the bottom hits the working end of the plug plate 209. At this time, due to the action of the inclined surface of the bottom of the L-shaped frame 201 and the inclined surface of the working end of the plug plate 209, the plug plate 209 is squeezed outward and moved, driving the moving plate 205 to move, and the moving plate 205 can squeeze the spring 206, and the spring 206 starts to The spring 206 is then reset when the working end of the plug plate 209 is aligned with the through slot 212 in the L-shaped frame 201, and the working end of the plug plate 209 is pushed into the through slot 212. At this time, the L-shaped frame 201 can be fixed. Then, the rubber plate 211 at the bottom of the cover plate 202 contacts the casting port 104 and plays a blocking effect. At the same time, the rubber strip 210 at the bottom of the cover strip 203 covers the heat dissipation channel 106 to block and protect it, preventing external dust and impurities from entering the casting mold and the heat dissipation channel 106. When the casting mold is used, the plug plate 209 is moved outward, and then the working end of the plug plate 209 is separated from the through slot 212, and then the cover plate 202, the cover strip 203, etc. are moved upward to be taken out;

[0035] When disassembling the convex block 204, the nut ring 300 is turned outward to unscrew it, and then the stud 301 is turned outward to make its end disengage from the screw hole 302, and then it can be removed. When installing, the operation can be carried out according to the opposite principle.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casting mold for forming an engine piston, comprising a lower mold (101) and an upper mold (102), wherein a casting block (105) is embedded in the upper mold (102), a mold cavity is provided inside the lower mold (101), a plurality of heat dissipation channels (106) are provided on the top of the upper mold (102), and a casting port (104) is provided on the upper surface of the casting block (105), characterized in that: The upper mold (102) is provided with a protection mechanism, the protection mechanism comprising a cover plate (202), two groups of cover strips (203) and two groups of convex blocks (204), a rubber plate (211) is fixedly provided at the bottom of the cover plate (202), a rubber strip (210) is fixedly provided at the bottom of the cover strip (203), the lower surface of the rubber strip (210) is in contact with the heat dissipation channel (106), and the lower surface of the rubber plate (211) is in contact with the casting The cover plate (202) is in contact with the casting mouth (104), L-shaped strips (200) are fixedly arranged between the two side surfaces of the cover plate (202) and the cover strip (203), L-shaped frames (201) are fixedly arranged on the front and back sides of the cover plate (202), a vertical groove is opened inside the convex block (204), the end of the L-shaped frame (201) passes through the inside of the vertical groove, and a fixing piece for fixing the L-shaped frame (201) is arranged on the convex block (204).

2. The casting mold for forming an engine piston according to claim 1, characterized in that: The fixing member comprises an inserting plate (209) and a fixing column (207); a groove is provided inside the convex block (204); a through groove (212) is provided inside the L-shaped frame (201); a working end of the inserting plate (209) passes through the groove and extends to the inside of the through groove (212).

3. The casting mold for forming an engine piston according to claim 2, characterized in that: A movable plate (205) is fixedly arranged on the front side of the plug plate (209), a sliding hole is provided inside the movable plate (205), one end of the fixed column (207) passes through the inside of the sliding hole, and the other end of the fixed column (207) is fixed on the convex block (204).

4. The casting mold for forming an engine piston according to claim 3, characterized in that: A fixing plate (208) is fixedly arranged on the outside of one end of the fixing column (207), and a spring (206) is fixedly arranged between the fixing plate (208) and the moving plate (205).

5. The casting mold for forming an engine piston according to claim 4, characterized in that: Two groups of mounting parts for disassembling and assembling the convex block (204) are arranged between the convex block (204) and the upper mold (102), and the mounting parts include studs (301) and nut rings (300). A through slot is provided inside the convex block (204), and two groups of screw holes (302) are provided on the front and back sides of the upper mold (102). The ends of the studs (301) pass through the through slots and penetrate into the interiors of the screw holes (302).

6. The casting mold for forming an engine piston according to claim 1, characterized in that: A base (100) is fixedly provided at the bottom of the lower mold (101), and connecting plates (103) are provided on the front and back sides of the upper mold (102) and the lower mold (101), and the connecting plates (103) are fixedly connected to the upper mold (102) and the lower mold (101) by two sets of bolts.

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