Ejection type demolding structure of pouring mold
The coordination of the guide pins and flanges of the ejection mold structure, combined with the design of positioning pins and spring washers, solves the problems of low demoulding efficiency and safety hazards of existing casting molds, and achieves efficient and stable mechanical demoulding effects.
Patent Information
- Application Number
- CN202422628594.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The existing demoulding method of casting molds has low production efficiency, low yield rate and safety hazards. In particular, large and heavy products are difficult to demould effectively and are prone to damage.
The ejection mold structure is adopted. Through the cooperation of the guide pin and the flange, mechanical force is used to achieve precise ejection. Combined with the design of the locating pin and the spring washer, the stable connection between the guide pin and the flange is ensured, gaps and deviations are avoided, and production efficiency and yield rate are improved.
It achieves efficient and stable mechanical demoulding, avoids product damage, improves production efficiency and yield rate, and reduces safety hazards.
Smart Images
Figure CN223395613U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting molds, in particular to an ejection type demoulding structure of a casting mold. Background Art
[0002] The current demolding method for casting molds is to peel off the protective cover on the product after the polyurethane product is cured and formed, and then remove the roller product from the mold by blowing with an air gun or a handheld magnetic suction tool. The air gun lowers the temperature of the mold while blowing air, which is not conducive to product removal. Some larger and heavier products have a lot of weight themselves and are difficult to remove with ordinary magnetic suction tools. After casting and forming, vacuum suction is generated between the product and the mold, increasing the demolding strength. Once the lead-out direction deviates, it will squeeze and damage the newly formed product, resulting in low production efficiency and yield rate. Utility Model Content
[0003] The purpose of the utility model is to provide a demoulding structure of a casting mold, so as to solve the problems existing in the above-mentioned prior art.
[0004] The above technical objectives of the present invention are achieved through the following technical solutions:
[0005] A casting mold ejection structure includes an ejection mold, the ejection mold includes a cylinder and a chassis, the bottom of the chassis is provided with a flange at intervals, the top end of the chassis is sleeved with a cylinder, the bottom end of the chassis is provided with a flange, a first through hole is provided at the middle position of the top of the chassis, a positioning pin is fixedly installed in the first through hole, a plurality of second through holes are axially evenly spaced at the top of the chassis, a guide sleeve is fixedly installed in each of the plurality of second through holes, a guide column is slidably installed in each of the plurality of guide sleeves, the bottoms of the plurality of guide columns are fixedly connected to the top of the flange, and a driving device is fixedly installed at the bottom of the flange.
[0006] By adopting the above technical solution, the guide pins and guide sleeves on the flange cooperate to achieve high-precision jacking. Compared with traditional air guns or magnetic suction tools, since the chassis fixedly connected to the cylinder is fixed, when the driving device lifts the flange, the guide pins will accurately lift the workpiece in the cylinder upward, thereby achieving demolding. In order to avoid the bottom of the workpiece and the top of the chassis from fitting inaccurately, the polyurethane adhesive will penetrate along the gap during pouring and will be fixed through the locating pins and the through-holes at the bottom of the hub. The locating pins themselves are interference fit with the chassis, so during the ejection process, the locating pins will not leave with the hub, but will remain on the chassis. Multiple guide pins replace the original upper force lifting type, and use mechanical hydraulics as the output source of force instead of manual lifting, reducing safety hazards. The output force and direction of the mechanical ejection are very stable, while improving the yield rate, production is no longer restricted by the size and weight of the hub, effectively improving production efficiency.
[0007] In a further embodiment, a hub is coaxially arranged inside the cylinder, a third through hole is provided at the middle position of the bottom of the hub, the hub is loosely fitted with the locating pin through the third through hole, the top outer periphery of the locating pin is chamfered, the side wall of the hub is spaced apart from the inner side wall of the cylinder, an upper cover is provided on the top of the hub, the upper cover is loosely fitted with the hub, and the top outer periphery of the upper cover is provided with an acute-angled chamfered structure.
[0008] By adopting the above technical solution, a protrusion similar to the locating pin is also provided at the bottom of the upper cover, which is used to cooperate with the through hole on the top of the hub, pressing the entire hub downward to cooperate with the locating pin to avoid similar gaps. The sharp-angled blunt structure on the top of the upper cover involves the inner top cover casting process.
[0009] In a further embodiment, a fourth through hole is provided at the middle position of the bottom of the flange, a threaded hole is provided at the top of the piston rod of the driving device, the threaded hole is coaxially arranged with the fourth through hole, a spring washer is provided at the top of the fourth through hole, and the flange and the piston rod of the driving device are bolted and fixed.
[0010] By adopting the above technical solution, the bolted fixation method is safe and effective, and the spring washer has better anti-loosening performance than ordinary washers. Because the driving device, whether it is a hydraulic press or a pneumatic press, will generate a certain amount of vibration when working, and at the same time, during the pouring process, the high-temperature polyurethane rubber will transfer heat to the mold and workpiece, and the guide column will also be affected. The tension and preload provided by the spring washer can effectively prevent the position of the flange and piston rod from shifting, thereby improving the durability and service life of the assembly.
[0011] In a further embodiment, the bottom of the flange is provided with a plurality of fifth through holes corresponding one-to-one to the positions of the plurality of guide pillars, the bottoms of the plurality of guide pillars are each provided with a second threaded hole, the bottoms of the plurality of fifth through holes are each provided with a spring washer, and the plurality of guide pillars are each bolted and fixed to the flange.
[0012] By adopting the above technical solution, the part of the guide column that is in direct contact with the workpiece will also vibrate, so it is also necessary to provide higher tension and preload through the spring washer.
[0013] In a further embodiment, the inner peripheral edge of the top of the cylinder is provided with a chamfer.
[0014] By adopting the above technical solution, the chamfer on the cylinder is also for cooperating with the inner top cover casting process.
[0015] In a further embodiment, a circular groove is provided on the top of the hub and the bottom of the hub.
[0016] By adopting the above technical solution, the top of the guide column can push against the circular groove at the bottom of the hub to eject the entire workpiece.
[0017] In summary, the present invention has the following beneficial effects:
[0018] 1. Through the setting of the driving device and the guide column, the workpiece can be ejected from the bottom of the workpiece by relying on stable and reliable mechanical force, which can avoid the damage of the product due to the deviation of the ejection direction, reduce manual handling operations, and avoid safety hazards;
[0019] 2. The positioning pins can be used to fit the bottom of the cylinder and the through-holes at the bottom of the hub, preventing the polyurethane rubber from penetrating into the gap between the two and affecting the casting of the hub. They play a positioning role when the hub is installed and a sealing role when casting.
[0020] 3. By setting the upper cover, the wheel hub placed on the positioning pin can be pressed downward and kept flat, thereby improving the pouring effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the overall structure of an ejection-type demoulding structure of a casting mold of the present invention, which is used to illustrate the connection relationship between the driving device and the ejection-type mold;
[0022] Figure 2 This is a schematic diagram of the internal structure of a casting mold in an ejection-type demoulding structure of the utility model;
[0023] Figure 3It is a structural schematic diagram for reflecting a wheel hub and a driving device in an ejection-type demoulding structure of a casting mold of the utility model.
[0024] In the figure, 1. ejection mold; 11. cylinder; 12. chassis; 13. upper cover; 2. flange; 3. flange; 4. positioning pin; 5. guide sleeve; 6. guide column; 7. driving device; 8. piston rod; 9. spring washer; 10. wheel hub. DETAILED DESCRIPTION
[0025] The present invention will be described in further detail below with reference to the accompanying drawings.
[0026] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description, the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from a particular component geometry, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this specification, "plurality" means two or more, unless otherwise specifically defined in terms of the center's direction.
[0027] Example:
[0028] like Figure 1-Figure 3As shown, a casting mold ejection structure includes an ejection mold 1, the ejection mold 1 includes a cylinder 11 and a chassis 12, the bottom of the chassis 12 is provided with a flange 2 at intervals, the top of the chassis 12 is sleeved with a cylinder 11, the top inner periphery of the cylinder 11 is provided with a chamfer, the bottom end of the chassis 12 is provided with a flange 3, a first through hole is provided at the middle position of the top of the chassis 12, a positioning pin 4 is fixedly installed in the first through hole, a plurality of second through holes are axially evenly spaced at the top of the chassis 12, a guide sleeve 5 is fixedly installed in each of the plurality of second through holes, a guide column 6 is slidably installed in each of the plurality of guide sleeves 5, the bottoms of the plurality of guide columns 6 are fixedly connected to the top of the flange 2, a driving device 7 is fixedly installed at the bottom of the flange 2, a wheel hub 10 is coaxially provided in the cylinder 11, the top of the wheel hub 10 and the wheel hub The bottom of each wheel hub 10 is provided with a circular groove, and a third through hole is provided in the middle position of the bottom of the wheel hub 10. The wheel hub 10 is clearance-matched with the locating pin 4 through the third through hole, and the top outer peripheral edge of the locating pin 4 is provided with a chamfer. The side wall of the wheel hub 10 is spaced apart from the inner wall of the cylinder 11, and an upper cover 13 is provided on the top of the wheel hub 10. The upper cover 13 is clearance-matched with the wheel hub 10, and the top outer peripheral edge of the upper cover 13 is provided with an acute-angled blunt structure. Through the guide sleeve 5 and the guide column 6, the mechanical force of the drive device 7 can be transmitted smoothly and accurately, avoiding errors in the guide, which may cause damage to the wheel body during the demoulding process, and effectively improves the yield rate. The locating pin 4 plays a positioning role when installing the wheel hub 10, and can also improve the sealing of the bottom of the wheel hub 10 and the bottom of the cylinder 11 during casting.
[0029] like Figure 1-Figure 3 As shown, a fourth through hole is provided at the middle position of the bottom of the flange 2, a threaded hole is provided at the top of the piston rod 8 of the driving device 7, the threaded hole is coaxially arranged with the fourth through hole, a spring washer 9 is provided at the top of the fourth through hole, the flange 2 and the piston rod 8 of the driving device 7 are bolted and fixed, a plurality of fifth through holes corresponding to the positions of the plurality of guide columns 6 are provided at the bottom of the plurality of guide columns 6, a second threaded hole is provided at the bottom of the plurality of guide columns 6, a spring washer 9 is provided at the bottom of the plurality of fifth through holes, and the plurality of guide columns 6 are bolted and fixed to the flange 2, and the tension and pre-tightening force provided by the spring washer 9 can prevent the flange 2 and the guide column 6 from loosening during the continuous vibration of the driving device 7.
[0030] Specific implementation process: First, the chassis 12 is placed above the driving device 7. The flange 3 at the bottom end of the outer side of the chassis 12 can fix the chassis 12 by pressing the code to prevent the ejection mold 1 from moving during the lifting process of the driving device 7. A positioning pin 4 is provided in the middle position of the chassis 12. After the wheel hub 10 is set on the positioning pin 4, it is flattened by the upper cover 13 and finally cast. Guide sleeves 5 are provided in multiple through holes on the chassis 12. Guide columns 6 are slidably installed in the guide sleeves 5. Multiple guide columns 6 are fixedly connected to the flange 2. After the casting is completed, the driving device 7 lifts the flange 2, and the guide columns 6 will cooperate with the guide sleeve 5 to achieve accurate and effective lifting of the workpiece.
[0031] In the embodiments disclosed in this utility model, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments disclosed in this utility model based on specific circumstances.
[0032] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment 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 casting mold ejection structure, comprising an ejection mold (1), characterized in that: The ejection mold (1) includes a cylinder (11) and a chassis (12), a flange (2) is arranged at intervals at the bottom of the chassis (12), a cylinder (11) is sleeved on the top end of the chassis (12), a flange (3) is arranged at the bottom end of the chassis (12), a first through hole is arranged at the middle position of the top of the chassis (12), a positioning pin (4) is fixedly installed in the first through hole, a plurality of second through holes are arranged at equal axial intervals at the top of the chassis (12), a guide sleeve (5) is fixedly installed in each of the plurality of second through holes, a guide column (6) is slidably installed in each of the plurality of guide sleeves (5), the bottoms of the plurality of guide columns (6) are fixedly connected to the top of the flange (2), and a driving device (7) is fixedly installed at the bottom of the flange (2).
2. The ejection demoulding structure of a casting mold according to claim 1, characterized in that: A wheel hub (10) is coaxially arranged in the cylinder (11), a third through hole is provided at the middle position of the bottom of the wheel hub (10), the wheel hub (10) is clearance-matched with the positioning pin (4) through the third through hole, the top outer peripheral edge of the positioning pin (4) is provided with a chamfer, the side wall of the wheel hub (10) is spaced apart from the inner side wall of the cylinder (11), an upper cover (13) is provided on the top of the wheel hub (10), the upper cover (13) is clearance-matched with the wheel hub (10), and the top outer peripheral edge of the upper cover (13) is provided with an acute-angled blunt structure.
3. The ejection demoulding structure of a casting mold according to claim 1, characterized in that: A fourth through hole is provided at the middle position of the bottom of the flange (2), a threaded hole is provided at the top of the piston rod (8) of the driving device (7), the threaded hole is coaxially arranged with the fourth through hole, a spring washer (9) is provided at the top of the fourth through hole, and the flange (2) and the piston rod (8) of the driving device (7) are bolted and fixed.
4. The ejection demoulding structure of a casting mold according to claim 3, characterized in that: The bottom of the flange (2) is provided with a plurality of fifth through holes corresponding one-to-one to the positions of the plurality of guide pillars (6), the bottoms of the plurality of guide pillars (6) are all provided with second threaded holes, the bottoms of the plurality of fifth through holes are all provided with spring washers (9), and the plurality of guide pillars (6) are all bolted and fixed to the flange (2).
5. The ejection demoulding structure of a casting mold according to claim 1, characterized in that: The inner peripheral edge of the top of the cylinder (11) is provided with a chamfer.
6. The ejection demoulding structure of a casting mold according to claim 2, characterized in that: The top of the hub (10) and the bottom of the hub (10) are both provided with circular grooves.