A compacting structure for a lost foam molding machine

Abstract

The utility model discloses a kind of pressing structure for lost foam forming machine, including pressing plate, forming machine type plate and backing plate;Forming machine type plate is provided with through-hole, and through-hole is inserted with stud, and the lower part of forming machine type plate is equipped with the positioning groove being communicated with through-hole, and the lower end of stud is equipped with the positioning plate being adapted with positioning groove, and pressing plate is sleeved on stud, and the upper portion of stud is connected with multiple nuts, and backing plate is located between pressing plate and forming machine type plate.Stem middle part of stud is connected with pressing nut by screw thread, and the upper portion of forming machine type plate is equipped with the sunken groove being coaxial with through-hole, and pressing nut is located in sunken groove.The depth of sunken groove is equal to the height of pressing nut, and one side of backing plate is in contact with the upper end surface of pressing nut.The utility model achieves stud anti-loose, anti-vibration, free from slip wire, with the advantages of simple structure, low cost, reliable installation and high stability.

Description

Technical Field

[0001] This utility model relates to the field of lost foam molding technology, specifically a pressing structure for a lost foam molding machine. Background Technology

[0002] Lost foam casting differs from other casting processes, and the factors affecting casting quality also differ. Since patterns are essential consumables in the lost foam casting process—one white pattern is required for each casting produced—the pattern is crucial to the success or failure of lost foam casting.

[0003] The lost foam mold is placed on the molding machine plate and fixed with pressure plates and bolts, as shown in the specific structure. Figure 5 As shown, a pressure plate with a slotted groove rests on the mold fixing plate at one end and on the pad at the other. Bolt holes are drilled in the forming machine plate, and bolts are tightened through the slot on the pressure plate to fix the pressure plate to the mold fixing plate. Generally, the lower mold is fixed in four places, and the upper mold in four places, which secures the mold firmly. Since only the bolt hole positions are fixed, the pad and pressure plate are adjustable, allowing for the fixing of molds of different sizes. This simple structure is relatively easy to operate. However, some problems still exist. Mainly, during the white mold blowing process, the mold is constantly subjected to hydraulic and pneumatic pressure, as well as its own weight. During the continuous lifting and lowering, various forces on the mold affect the bolt positions. On the one hand, this causes the bolts to loosen, requiring periodic tightening. Otherwise, the gap between the molds will change, causing the white mold dimensions to deviate from tolerance, or even damaging the mold's movable parts. On the other hand, it causes continuous wear on the bolts and screws in the bolt holes. When the wear reaches a certain level, the bolts and bolt holes can no longer be tightened. At this point, the bolts need to be replaced, and the bolt holes need to be enlarged and tapped. Replacing the bolts is simple, but enlarging and tapping are more difficult, requiring equipment relocation and consuming a significant amount of time. There is also a risk of bolt breakage, with parts remaining in the bolt holes and unable to be removed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a clamping structure for a lost foam molding machine. It does not make much change to the original structure and achieves anti-loosening, vibration resistance, and thread stripping prevention of the studs. It has the advantages of simple structure, low cost, reliable installation and high stability, and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamping structure for a lost foam casting machine, comprising a pressure plate, a casting machine template, and a pad; the casting machine template has a through hole, into which a stud is inserted; the lower part of the casting machine template has a positioning groove communicating with the through hole; the lower end of the stud has a positioning plate adapted to the positioning groove; the pressure plate is sleeved on the stud; the upper part of the stud is threaded with multiple nuts; and the pad is located between the pressure plate and the casting machine template.

[0006] Preferably, a clamping nut is threadedly connected to the middle of the stud body, and a groove coaxial with the through hole is provided on the upper part of the forming machine plate, with the clamping nut located in the groove.

[0007] Preferably, the depth of the sink is equal to the height of the clamping nut, and one side of the pad abuts against the upper surface of the clamping nut.

[0008] Preferably, the positioning groove is a long groove, the positioning plate is a square iron block, and the positioning plate and the positioning groove are fitted with a clearance.

[0009] Preferably, the stud is welded to the positioning plate.

[0010] Preferably, a washer is provided between the nut and the pressure plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The positioning plate welded to the lower end of the stud fits with the positioning groove with a clearance, giving the stud sufficient friction and resistance, effectively limiting the rotation and axial movement of the stud during use, preventing the nut from loosening due to vibration, and improving the stability and safety of the clamping structure. 2. The clamping nut is placed in the sinker and then pressed down by the pad, which further restricts the axial movement of the stud. When the molding machine is working, the fastening is more secure and less likely to loosen. 3. There is no need to set screw holes on the molding plate, so there is no need to worry about stripping. 4. Minimal changes to the original structure, simple operation, and low cost; In summary, this utility model achieves anti-loosening, vibration resistance, and thread stripping prevention of studs, and has the advantages of simple structure, low cost, reliable installation, and high stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural side view of the present invention; Figure 3 This is a schematic diagram of the molding machine template structure of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the molding machine template structure of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of a traditional clamping structure.

[0013] In the diagram: 1. Stud, 2. Nut, 3. Pressure plate, 4. Forming plate, 5. Pad, 6. Positioning plate, 7. Clamping nut, 8. Through hole, 9. Countersunk groove, 10. Positioning groove. Detailed Implementation

[0014] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0015] Please see Figure 1-5 The present invention provides the following technical solution: Example 1: A clamping structure for a lost foam casting machine includes a pressure plate 3, a molding machine template 4, and a pad 5; the molding machine template 4 has a through hole 8, and a stud 1 is inserted into the through hole 8; the lower part of the molding machine template 4 has a positioning groove 10 communicating with the through hole 8; the lower end of the stud 1 has a positioning plate 6 adapted to the positioning groove 10; the pressure plate 3 is sleeved on the stud 1; the upper part of the stud 1 is threaded with multiple nuts 2; and the pad 5 is located between the pressure plate 3 and the molding machine template 4. Specifically, the positioning groove 10 is a long groove, the positioning plate 6 is a square iron block, and the positioning plate 6 and the positioning groove 10 are fitted with a clearance. The traditional threaded hole is replaced with a through hole 8, through which the stud 1 passes, eliminating the need for threaded connection and solving the traditional problem of thread stripping. By welding a positioning plate 6 to the end of the stud 1, the positioning plate 6 and the positioning groove 10 are fitted with a clearance, increasing the friction during the fastening process. When the friction is insufficient, the stud 1 is secured by the blocking effect of the side wall of the positioning groove 10, effectively limiting the rotation and axial movement of the stud 1 during use, preventing the nut from loosening due to vibration, and improving the stability and safety of the clamping structure.

[0016] Example 2: Unlike Example 1, the stud 1 has a threaded connection of a clamping nut 7 in the middle of its body. The upper part of the molding machine plate 4 has a countersunk groove 9 coaxial with the through hole 8, and the clamping nut 7 is located in the countersunk groove 9. The depth of the countersunk groove 9 is equal to the height of the clamping nut 7, and one side of the pad 5 abuts against the upper end face of the clamping nut 7. The diameter of the countersunk groove 9 is twice the diameter of the clamping nut 7, which makes it easy to screw the clamping nut 7 into the countersunk groove 9. The clamping nut 7 is placed in the countersunk groove 9 and then pressed by the pad 5, which further restricts the axial direction of the stud 1. When the molding machine is operating, the stud 1 is not easy to loosen, and the fastening is more secure.

[0017] Example 3: Unlike Example 1, the stud 1 is welded to the positioning plate 6; a washer is also provided between the nut 2 and the pressure plate 3 to increase friction and prevent the nut 2 from slipping.

[0018] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A pressing structure for a lost foam molding machine, comprising a pressing plate (3), a molding machine template (4), and a backing plate (5); characterized in that: The molding plate (4) has a through hole (8), and a stud (1) is inserted into the through hole (8). The lower part of the molding plate (4) has a positioning groove (10) that communicates with the through hole (8). The lower end of the stud (1) has a positioning plate (6) that matches the positioning groove (10). The pressure plate (3) is sleeved on the stud (1). The upper part of the stud (1) is threaded with multiple nuts (2). The pad (5) is located between the pressure plate (3) and the molding plate (4).

2. The compacting structure for a lost foam molding machine according to claim 1, wherein: The stud (1) has a threaded connection of a clamping nut (7) in the middle of its body. The upper part of the forming machine plate (4) is provided with a groove (9) coaxial with the through hole (8), and the clamping nut (7) is located in the groove (9).

3. The clamping structure for a lost foam casting machine according to claim 2, characterized in that: The depth of the sink (9) is equal to the height of the clamping nut (7), and one side of the pad (5) abuts against the upper surface of the clamping nut (7).

4. The clamping structure for a lost foam casting machine according to claim 1, characterized in that: The positioning groove (10) is a long groove, and the positioning plate (6) is a square iron block. The positioning plate (6) and the positioning groove (10) are fitted with a clearance.

5. The clamping structure for a lost foam casting machine according to claim 1, characterized in that: The stud (1) is welded to the positioning plate (6).

6. The clamping structure for a lost foam casting machine according to claim 1, characterized in that: A washer is also provided between the nut (2) and the pressure plate (3).

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