Tool for precoated sand casting of grooved pipe fitting clamping head

Abstract

The utility model discloses a tool for precoated sand casting of grooved pipe fitting chucks, which comprises a bottom plate, an upper template and a lower template, the top of the bottom plate is movably provided with a top plate through a hydraulic oil cylinder, the bottom of the top plate is fixedly connected with the top of the upper template through a connecting rod, overflow holes are arranged on both sides of the top surface of the upper template, and the overflow holes are communicated with the upper template. A pushing mechanism is arranged on the top surface of the upper template; the material pushing mechanism comprises two baffles fixedly arranged on the top face of the upper die plate, and push plates are arranged on the two sides of the top of the upper die plate in a sliding mode. According to the tool for precoated sand casting of the groove pipe fitting clamping head, through the arrangement of the pushing mechanism, precoated sand overflowing out of the top face of the upper mold plate can be cleaned and pushed into the collecting box, unified treatment of follow-up personnel is facilitated, personnel operation is not needed, convenience and rapidness are achieved, and the problems that cleaning is inconvenient and resources are wasted due to scattering of the precoated sand are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of grooved pipe clamps, in particular to a tooling for casting coated sand for grooved pipe clamps. Background Art

[0002] In the casting process of grooved pipe fittings, sand casting molds are usually used, which makes sand castings have the advantages of high dimensional accuracy, small processing allowance, low cost and low scrap rate of castings. Among them, coated sand is a kind of high-quality sand formed by using selected natural sand as sand base and coated with resin with special properties. This coated sand has high strength and good fluidity, and the sand castings formed have smooth roughness.

[0003] When producing coated sand castings, the upper mold is first pressed down against the lower mold, and then the sand is pushed by the sand shooting machine to enter the tooling cavity through the sand shooting holes to fill the cavity. Under the physical and chemical effects, it hardens and forms a coated sand casting. Finally, the upper and lower molds are separated, and the coated sand casting is ejected by the ejector assembly on the ejector plate.

[0004] According to the patent application number CN202222951355.1, after the sand-shooting part injects the coated sand into the molding cavity, the upper mold plate and the lower mold plate are pressed and formed. At this time, the excess coated sand flows out along the overflow hole, so that the coated sand is stably formed in the molding cavity, reducing the defects and deformation on the surface of the sand mold casting after molding, and reducing the scrap rate of the sand mold casting;

[0005] In the above patent, excess coated sand overflows along the overflow hole onto the top surface of the upper template and is not collected in time, causing the coated sand to fall off when the upper template moves up and down, making it difficult to clean and affecting subsequent casting work. Therefore, in view of the above shortcomings, the utility model makes the following improvements. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a tooling for casting coated sand of a grooved pipe clamp, which solves the problems mentioned in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above purpose, the utility model is implemented through the following technical solutions: a tooling for groove pipe fitting clamp coated sand casting, comprising a bottom plate, an upper template and a lower template, the top of the bottom plate is movably provided with a top plate through a hydraulic cylinder, and the bottom of the top plate is fixedly connected to the top of the upper template through a connecting rod, overflow holes are opened on both sides of the top surface of the upper template, and a pushing mechanism is provided on the top surface of the upper template;

[0010] The pushing mechanism includes a baffle fixedly arranged on the top surface of the upper template, and there are two baffles, push plates are slidably arranged on both sides of the top of the upper template, and a scraper strip is fixedly arranged on the bottom of the push plate, a motor is arranged on the top of the upper template, and one end of the motor output shaft is fixedly connected to a threaded rod through a coupling, a sliding block is threadedly connected to the surface of the threaded rod, and both sides of the sliding block are rotatably connected to inclined rods through a U-shaped shaft, and the bottom end of the inclined rod is rotatably connected to the top of the push plate through a rotating shaft.

[0011] Preferably, the bottom end of the threaded rod is rotatably connected to the top surface of the top plate via a bearing, and the surface of the push plate is slidably connected to the surface of the baffle plate.

[0012] Preferably, guide blocks are fixedly provided on both sides of the upper template, and a collection box is slidably provided on one side of the guide block.

[0013] Preferably, a pressure-driven exhaust mechanism is provided inside the top plate, and four groups of the pressure-driven exhaust mechanisms are provided and are respectively arranged directly above four overflow holes.

[0014] Preferably, the pressure-driven exhaust mechanism includes an upper iron block movably arranged on the top surface of the top plate, and vertical rods are fixedly arranged on both sides of the bottom of the upper iron block, the bottom ends of the vertical rods penetrate the top plate and extend to the bottom of the top plate, a lower pressure plate is fixedly arranged at one end of the vertical rod located at the bottom of the top plate, and an exhaust hole is opened in the middle of the lower pressure plate, an electromagnet is fixedly arranged at the top of the top plate and directly below the upper iron block, and a buffer spring is fixedly connected between the top plate and the side opposite to the upper iron block and on the surface of the vertical rod.

[0015] Preferably, jet holes are provided on the front and back sides of the lower template.

[0016] (III) Beneficial effects

[0017] The utility model provides a tooling for casting coated sand of grooved pipe fitting clamps, which has the following beneficial effects:

[0018] (1) The tooling for casting coated sand of the grooved pipe clamp can clean and push the coated sand overflowing on the top surface of the upper template into the interior of the collection box through the setting of the pushing mechanism, so as to facilitate the unified treatment by subsequent personnel. No human operation is required, which is convenient and quick, and avoids the problem of inconvenience in cleaning and waste of resources caused by the spillage of coated sand.

[0019] (2) The tooling for casting coated sand of the grooved pipe clamp can compact the coated sand in the inner area of ​​the overflow hole by setting a pressure exhaust mechanism, and exhaust the air in the molding cavity by setting the exhaust hole, thereby improving the quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a three-dimensional diagram of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the upper template of the utility model;

[0022] Figure 3 For this utility model Figure 1 A partial enlarged view of point A in the middle.

[0023] In the figure: 1. upper template; 2. hydraulic cylinder; 3. top plate; 4. overflow hole; 5. pushing mechanism; 51. baffle; 52. push plate; 53. scraper; 54. threaded rod; 55. sliding block; 56. inclined rod; 57. collecting box; 58. motor; 6. pressure exhaust mechanism; 61. upper iron block; 62. vertical rod; 63. lower pressure plate; 64. electromagnet; 65. buffer spring; 7. lower template; 8. jet hole. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiment 1

[0026] See also Figures 1 to 3 As shown, the utility model provides a technical solution to clean and collect the coated sand overflowing on the top surface of the upper template 1. The specific improvements are as follows:

[0027] A tooling for casting coated sand for grooved pipe fitting clamps, comprising a bottom plate, an upper template 1 and a lower template 7, wherein the front and back sides of the lower template 7 are provided with jet holes 8, a top plate 3 is movably provided on the top of the bottom plate through a hydraulic cylinder 2, and the bottom of the top plate 3 is fixedly connected to the top of the upper template 1 through a connecting rod, and the extended end of the hydraulic cylinder 2 is fixedly connected to the bottom of the top plate 3, overflow holes 4 are provided on both sides of the top surface of the upper template 1, and four groups of overflow holes 4 are provided, and a pushing mechanism 5 is provided on the top surface of the upper template 1, and the pushing mechanism 5 includes a baffle 51 fixedly provided on the top surface of the upper template 1, and two baffles 51 are provided, and the baffle 51 can prevent the coated sand from overflowing from the front and back sides of the upper template 1, and the upper template Push plates 52 are slidably arranged on both sides of the top of the upper mold plate 1, and a scraper strip 53 is fixedly arranged on the bottom of the push plate 52. The surface of the push plate 52 is slidably connected to the surface of the baffle plate 51. A motor 58 is arranged on the top of the upper mold plate 1, and one end of the output shaft of the motor 58 is fixedly connected to a threaded rod 54 through a coupling. The bottom end of the threaded rod 54 is rotatably connected to the top surface of the top plate 3 through a bearing. A sliding block 55 is threadedly connected to the surface of the threaded rod 54, and both sides of the sliding block 55 are rotatably connected to an inclined rod 56 through a U-shaped shaft. The bottom end of the inclined rod 56 is rotatably connected to the top of the push plate 52 through a rotating shaft. Guide blocks are fixedly arranged on both sides of the upper mold plate 1, and a collecting box 57 is slidably arranged on one side of the guide block.

[0028] Start the hydraulic cylinder 2 so that the extended end of the hydraulic cylinder 2 drives the top plate 3 to move downward, and the upper template 1 is moved synchronously by the setting of the connecting rod until the upper template 1 is pressed against the top surface of the lower template 7, and then the coated sand is injected into the jet hole 8 through the external sand shooting machine, so that the coated sand enters the molding cavity between the upper template 1 and the lower template 7 until it is full. At this time, the excess coated sand flows out along the overflow hole 4 to the top surface of the upper template 1, and the motor 58 is started so that the motor 58 drives the threaded rod 54 to rotate. At this time, the sliding block 55 moves downward along the surface of the threaded rod 54, and then the two ends of the inclined rod 56 are rotated, so that the two inclined rods 56 respectively drive the two push plates 52 to move away from each other, and the two push plates 52 drive the scraper 53 to move, so that the coated sand flowing out around the overflow hole 4 is pushed into the collection box 57 for unified collection.

[0029] Embodiment 2

[0030] Based on Example 1, please refer to Figure 1 and Figure 3 As shown, in order to realize compaction and exhaust of the coated sand in the inner area of ​​the overflow hole 4, the specific improvements are as follows:

[0031] A pressure-driven exhaust mechanism 6 is provided inside the top plate 3, and the pressure-driven exhaust mechanism 6 is provided with four groups and is respectively arranged directly above the four overflow holes 4. The pressure-driven exhaust mechanism 6 includes an upper iron block 61 movably arranged on the top surface of the top plate 3, and vertical rods 62 are fixedly provided on both sides of the bottom of the upper iron block 61, and the bottom ends of the vertical rods 62 penetrate the top plate 3 and extend to the bottom of the top plate 3, and a lower pressure plate 63 is fixedly provided at one end of the vertical rod 62 located at the bottom of the top plate 3, and an exhaust hole is opened in the middle of the lower pressure plate 63, an electromagnet 64 is fixedly provided at the top of the top plate 3 and directly below the upper iron block 61, and a buffer spring 65 is fixedly connected between the top plate 3 and the side opposite to the upper iron block 61 and on the surface of the vertical rod 62.

[0032] The electromagnet 64 is energized by an external switch to generate magnetism, thereby having an adsorption force on the upper iron block 61. The upper iron block 61 is subjected to the adsorption force and drives the vertical rod 62 to move downward along the inside of the top plate 3. At this time, the lower pressure plate 63 moves synchronously. When the lower pressure plate 63 moves to the inside of the overflow hole 4, the coated sand in the internal area of ​​the overflow hole 4 can be compacted, and through the setting of the exhaust hole, the air inside the molding cavity can be discharged during the compaction process, thereby improving the molding quality of the casting. After the electromagnet 64 is powered off, it loses its adsorption force on the upper iron block 61. At this time, the upper iron block 61 moves upward under the action of the buffer spring 65, thereby causing the lower pressure plate 63 to be separated from the inside of the overflow hole 4.

[0033] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] Although 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 tooling for casting coated sand for grooved pipe fitting clamps, comprising a base plate, an upper template (1) and a lower template (7), characterized in that: A top plate (3) is movably provided on the top of the bottom plate through a hydraulic cylinder (2), and the bottom of the top plate (3) is fixedly connected to the top of the upper template (1) through a connecting rod, overflow holes (4) are provided on both sides of the top surface of the upper template (1), and a material pushing mechanism (5) is provided on the top surface of the upper template (1); The pushing mechanism (5) comprises a baffle (51) fixedly arranged on the top surface of the upper template (1), and two baffles (51) are provided, push plates (52) are slidably arranged on both sides of the top of the upper template (1), and a scraper strip (53) is fixedly arranged at the bottom of the push plate (52), a motor (58) is provided on the top of the upper template (1), and one end of the output shaft of the motor (58) is fixedly connected to a threaded rod (54) through a coupling, a sliding block (55) is threadedly connected to the surface of the threaded rod (54), and both sides of the sliding block (55) are rotatably connected to inclined rods (56) through U-shaped shafts, and the bottom end of the inclined rod (56) is rotatably connected to the top of the push plate (52) through a rotating shaft.

2. A tooling for casting coated sand for grooved pipe fitting clamps according to claim 1, characterized in that: The bottom end of the threaded rod (54) is rotatably connected to the top surface of the top plate (3) via a bearing, and the surface of the push plate (52) is slidably connected to the surface of the baffle (51).

3. A tooling for casting coated sand for grooved pipe clamps according to claim 1, characterized in that: Guide blocks are fixedly arranged on both sides of the upper template (1), and a collection box (57) is slidably arranged on one side of the guide block.

4. A tooling for casting coated sand for grooved pipe clamps according to claim 1, characterized in that: A pressure-driven exhaust mechanism (6) is arranged inside the top plate (3), and four groups of the pressure-driven exhaust mechanisms (6) are arranged directly above four overflow holes (4) respectively.

5. A tooling for casting coated sand for grooved pipe clamps according to claim 4, characterized in that: The pressure-driven exhaust mechanism (6) comprises an upper iron block (61) movably arranged on the top surface of the top plate (3), and vertical rods (62) are fixedly arranged on both sides of the bottom of the upper iron block (61), the bottom ends of the vertical rods (62) penetrate the top plate (3) and extend to the bottom of the top plate (3), a lower pressure plate (63) is fixedly arranged at one end of the vertical rod (62) located at the bottom of the top plate (3), and an exhaust hole is opened in the middle of the lower pressure plate (63), an electromagnet (64) is fixedly arranged at the top of the top plate (3) and directly below the upper iron block (61), and a buffer spring (65) is fixedly connected between the top plate (3) and the side opposite to the upper iron block (61) and located on the surface of the vertical rod (62).

6. The tooling for casting coated sand for grooved pipe clamps according to claim 1, characterized in that: The front and back sides of the lower template (7) are both provided with jet holes (8).

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