Automatic demoulding device for precast concrete

Abstract

The utility model discloses an automatic demolding device for a concrete prefabricated part. The automatic demolding device comprises a supporting frame, a forming mold is arranged at the top of the supporting frame, and a demolding ejection mechanism is arranged in the supporting frame; the demolding ejection mechanism comprises a group of V-shaped connecting rods; the V-shaped connecting rod comprises a driving rod and a driven rod; the end part of the driving rod is connected with a piston rod of the air cylinder; the air cylinder is fixed to the supporting frame. The end face of the driven rod is an inclined arc face and is in contact fit with the bottom end of the ejector rod. The top end of the ejector rod sequentially penetrates through the supporting frame and the forming die, and the end face of the ejector rod is flush with the surface of a bottom plate of the forming die. The bent part of the V-shaped connecting rod is hinged to the base; the base is arranged on a bottom plate of the supporting frame; during demolding, a piston rod of the air cylinder stretches out, pressure is applied to the driving rod, the driving rod moves downwards, at the moment, the driving rod can rotate around the base, the driven rod moves upwards, and therefore the ejector rod is driven to eject upwards to eject out the concrete prefabricated part in the forming mold.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated concrete parts, in particular to an automatic demoulding device for prefabricated concrete parts. Background Art

[0002] In recent years, precast concrete parts have been widely used in the bridge construction industry. Precast concrete parts are building components made in advance in factories using concrete as the basic material, including beams, slabs, columns and building decoration accessories. Compared with traditional cast-in-place concrete, precast concrete parts have a safer construction environment and faster installation speed, which can significantly improve the construction progress. At the same time, it can also reduce the amount of on-site work on the construction site, thereby reducing dust and noise pollution.

[0003] In the manufacturing process of precast concrete parts, it is first necessary to inject the mixed fluid concrete into the molding mold, and then demold it after the concrete is completely solidified. Demolding operation is an important part of the production of precast concrete parts, and the quality of the demolding effect directly affects the quality of the finished product. In the prior art, the demolding of precast concrete parts is generally achieved by manually knocking on the outside of the mold; this method not only has high labor costs and low demolding efficiency, but also easily causes damage to the mold or damage to the precast concrete parts, which affects subsequent use. In addition, demolding speed is also one of the factors to ensure demolding quality. The speed requirements at the beginning, during and at the end of demolding are different, but the existing demolding device cannot achieve different demolding speeds at each stage of demolding. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the present application provides an automatic demoulding device for precast concrete parts. The automatic demoulding device for precast concrete parts of the present application is provided with a demoulding and ejecting mechanism below the forming mold, including a group of V-shaped connecting rods composed of a driving rod and a driven rod. When demoulding, the driving rod is subjected to downward pressure by a cylinder, so that the driven rod moves upward, thereby driving the ejector rod to push up and eject the precast concrete parts in the forming mold. The demoulding efficiency is high, the labor cost is reduced, and it is not easy to cause damage to the precast concrete parts and the forming mold; in addition, the end face of the driven rod adopts a special contour shape, and the speed of the ejector rod moving upward can be controlled by its contour curve, so that different demoulding speeds can be adopted in each stage of demoulding, so that demoulding is more stable and effective; in actual use, driven rods with different contour shapes at the end can be adopted according to different demoulding speed requirements.

[0005] The technical solution of this application is:

[0006] The automatic demoulding device for precast concrete parts comprises a supporting frame; a forming mold is arranged on the top of the supporting frame; a demoulding and ejecting mechanism is arranged inside the supporting frame; the demoulding and ejecting mechanism comprises a group of V-shaped connecting rods; the V-shaped connecting rods comprise a driving rod and a driven rod; the end of the driving rod is connected to the piston rod of a cylinder; the cylinder is fixed on the supporting frame; the end face of the driven rod is an inclined arc surface, and contacts and cooperates with the bottom end of the ejector rod; the top end of the ejector rod passes through the supporting frame and the forming mold in turn, and the end face is flush with the bottom plate surface of the forming mold; the bending part of the V-shaped connecting rod is hingedly mounted on the base; the base is arranged on the supporting frame; when demoulding, the piston rod of the cylinder extends out, exerts pressure on the driving rod to make it move downward, at which time the driving rod rotates around the base, so that the driven rod moves upward, thereby driving the ejector rod to push up and eject the precast concrete parts in the forming mold.

[0007] Compared with the prior art, the automatic demoulding device for precast concrete parts of the present application comprises a supporting frame, a forming mold and a demoulding and ejecting mechanism located below the forming mold; the demoulding and ejecting mechanism comprises a group of V-shaped connecting rods consisting of a driving rod and a driven rod, wherein the bending part of the V-shaped connecting rod is hinged to the base on the supporting frame, the driving rod is connected to the piston rod of the cylinder, and the driven rod is in contact with the ejector rod; during demoulding, the cylinder applies downward pressure to the driving rod, so that the driven rod moves upward, thereby driving the ejector rod to push up and eject the precast concrete parts in the forming mold, so that the demoulding efficiency is high and the labor cost is reduced; in addition, the end face of the driven rod adopts a special contour shape (inclined arc surface), and the speed of the ejector rod moving upward can be controlled by its contour curve, so that different demoulding speeds can be adopted in each stage of demoulding, so that the demoulding is smoother; in actual use, according to different demoulding speed requirements, driven rods with different contour shapes at the end can be adopted.

[0008] As an optimization, in the aforementioned automatic demoulding device for precast concrete parts, a roller is provided at the bottom end of the push rod, thereby reducing the friction (rolling friction in this case) between the push rod and the inclined arc surface, making it easier for the driven rod to drive the push rod to push up.

[0009] Furthermore, a top block is provided at the top of the ejector rod, and the top block is in the shape of a trumpet with a larger top and a smaller bottom. Thus, the contact area between the ejector rod and the precast concrete part can be increased, so that the ejector rod can more easily support the precast concrete part during demoulding, and the ejection process is smoother.

[0010] Furthermore, a limit slider is provided on the side of the ejector rod, and correspondingly, a notch for the limit slider to pass through is provided on the top plate of the support frame. The limit slider is used to limit the circular motion of the ejector rod to prevent position deviation when it moves upward, thereby ensuring that the ejector rod can be lifted more smoothly and further improving the stability of the demoulding action.

[0011] As an optimization, in the aforementioned automatic demoulding device for precast concrete parts, two V-shaped connecting rods are respectively provided on both sides of the cylinder, thereby making the force on the precast concrete parts more uniform, making them less likely to be damaged during demoulding, and ensuring product quality.

[0012] As an optimization, in the aforementioned automatic demoulding device for precast concrete parts, a fixing ring is provided at the end of the piston rod; four connecting blocks are provided at intervals on the outer circumference of the fixing ring; a sliding shaft is provided on the connecting block, and a long waist hole is provided on the driving rod, and the sliding shaft cooperates with the long waist hole and can slide in the long waist hole. In this case, the structure is simple and the assembly is convenient, so that the overall structure of the demoulding device is simplified and the manufacturing cost is low.

[0013] As an optimization, in the aforementioned automatic demoulding device for precast concrete parts, two inverted L-shaped limit rods are symmetrically provided on the top of the support frame, and the forming mold is inserted between the two limit rods. The limit rods are used to fix the forming mold on the support frame, which is convenient for disassembly and assembly and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the automatic demoulding device for precast concrete parts of the present application;

[0015] Figure 2 It is a structural schematic diagram of the support frame in this application;

[0016] Figure 3 It is a structural schematic diagram of the forming mold in this application;

[0017] Figure 4 It is a schematic diagram of the assembly of the cylinder and the V-shaped connecting rod in this application;

[0018] Figure 5 It is a schematic diagram of the structure of the ejector rod in this application.

[0019] The markings in the attached drawings are: 1-support frame, 101-notch, 11-limiting rod; 2-forming mold, 201-countersunk hole; 3-V-shaped connecting rod, 31-driving rod, 311-long waist hole, 32-driven rod, 321-inclined arc surface; 4-cylinder, 41-piston rod; 5-top rod, 51-roller, 52-top block, 53-limiting slider; 6-base; 7-fixing ring, 71-connecting block; 8-precast concrete part. DETAILED DESCRIPTION

[0020] The present application is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present application.

[0021] In the prior art, precast concrete parts are generally demoulded by knocking, which can easily cause damage to the mold or breakage of the precast concrete parts, and has high labor costs and low demoulding efficiency. In view of this, the present application provides an automatic demoulding device for precast concrete parts.

[0022] See also Figure 1 The automatic demoulding device for precast concrete parts of the present application comprises a supporting frame 1; a forming mold 2 is arranged on the top of the supporting frame 1; a demoulding and ejecting mechanism is arranged inside the supporting frame 1; the demoulding and ejecting mechanism comprises a group of V-shaped connecting rods 3; the V-shaped connecting rods 3 comprise a driving rod 31 and a driven rod 32; the end of the driving rod 31 is connected to the piston rod 41 of the cylinder 4; the cylinder 4 is fixed on the supporting frame 1; the end face of the driven rod 32 is an inclined arc surface 321 (the side close to the cylinder 4 is lower), and contacts and cooperates with the bottom end of the ejector rod 5; the top end of the ejector rod 5 passes through the supporting frame 1 and the forming mold 2 in turn, and the end face is flush with the bottom plate surface of the forming mold 2; the bending part of the V-shaped connecting rod 3 is hingedly mounted on the base 6; the base 6 is arranged on the bottom plate of the supporting frame 1.

[0023] Example:

[0024] See also Figure 3 In this embodiment, a roller 51 is provided at the bottom end of the push rod 5. Thus, the friction (rolling friction in this case) between the push rod 5 and the inclined arc surface 321 can be reduced, making it easier for the driven rod 32 to drive the push rod 5 to push upward.

[0025] Furthermore, a top block 52 is provided at the top of the ejector rod 5, and the top block 52 is in the shape of a trumpet with a larger top and a smaller bottom. Correspondingly, a countersunk hole 201 with a larger top and a smaller bottom is provided on the bottom plate of the molding mold 2. When demoulding, the top end surface of the ejector rod 5 will collide with the bottom of the precast concrete part 8; the provision of the top block 52 can increase the contact area between the ejector rod 5 and the precast concrete part 8, so that the ejector rod 5 can more easily support the precast concrete part 8 when demoulding, and the ejection process is smoother.

[0026] Furthermore, a limit slider 53 is provided on the side of the ejector rod 5, and correspondingly, a notch 101 is provided on the top plate of the support frame 1 for the limit slider 53 to pass through. The limit slider 53 is used to limit the circular motion of the ejector rod 5 to prevent the position from shifting when it moves upward, thereby ensuring that the ejector rod 5 can be lifted more smoothly and further improving the stability of the demoulding action.

[0027] See also Figure 5In this embodiment, two V-shaped connecting rods 3 are respectively provided on both sides of the cylinder 4, that is, four V-shaped connecting rods 3 are provided in the demoulding and ejecting mechanism, and correspondingly, the number of the ejector rods 5 is also four. During demoulding, the precast concrete part 8 is ejected upward by the four ejector rods 5, so that the force on the precast concrete part 8 is more uniform, and it is not easy to be damaged during demoulding, thereby ensuring product quality.

[0028] Furthermore, a fixing ring 7 is provided at the end of the piston rod 41; four connecting blocks 71 are provided at intervals on the outer circumference of the fixing ring 7; a sliding shaft is provided on the connecting block 71, and a long waist hole 311 is provided on the driving rod 31, and the sliding shaft cooperates with the long waist hole 311 and can slide in the long waist hole 311. In this case, the structure is simple and the assembly is convenient, so that the overall structure of the demoulding device is simplified and the manufacturing cost is low.

[0029] In this embodiment, two inverted L-shaped limit rods 11 are symmetrically arranged on the top of the support frame 1, and the forming mold 2 is inserted between the two limit rods 11. The limit rods 11 are used to fix the forming mold 2 on the support frame 1, which is convenient for disassembly and assembly and easy to implement.

[0030] How it works:

[0031] First, the mixed fluid concrete is injected into the forming mold 2, and then demoulding is performed after the concrete is completely solidified.

[0032] During demoulding, the piston rod 41 of the air cylinder 4 extends out, exerts pressure on the driving rod 31, and makes it move downward. At this time, the driving rod 31 rotates around the base 6, and the sliding shaft on the connecting block 71 slides in the long waist hole 311 on the driving rod 31, so that the driven rod 32 moves upward, thereby driving the ejector rod 5 to push up and eject the concrete precast part 8 in the forming mold 2. Since the top end face of the driven rod 32 is set as a special inclined arc surface 321, during demoulding, the speed of the ejector rod 5 moving upward can be controlled by the contour curve (that is, the top end of the driven rod 32 is equivalent to a cam structure, and the cam profile determines the rising speed of the ejector rod 5), and its ejection speed at each stage is reasonably distributed to improve the demoulding quality.

[0033] The above general description of the utility model involved in this application and the description of its specific implementation method should not be understood as limiting the technical solution of the utility model. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and the specific implementation method (including examples) without violating the constituent elements of the utility model involved, to form other technical solutions within the scope of protection of this application.

Claims

1. Automatic demoulding device for precast concrete parts, characterized by: The invention comprises a support frame (1); a forming mold (2) is provided on the top of the support frame (1); a demoulding and ejecting mechanism is provided inside the support frame (1); the demoulding and ejecting mechanism comprises a group of V-shaped connecting rods (3); the V-shaped connecting rods (3) comprise a driving rod (31) and a driven rod (32); the end of the driving rod (31) is connected to the piston rod (41) of the cylinder (4); the cylinder (4) is fixed on the support frame (1); the end surface of the driven rod (32) is an inclined arc surface (321) and contacts and cooperates with the bottom end of the ejector rod (5); the ejector rod (5 ) passes through the support frame (1) and the forming mold (2) in sequence, and the end face is flush with the bottom plate surface of the forming mold (2); the bending part of the V-shaped connecting rod (3) is hingedly mounted on the base (6); the base (6) is arranged on the support frame (1); when demoulding, the piston rod (41) of the cylinder (4) extends out, exerts pressure on the driving rod (31), causing it to move downward, and at this time the driving rod (31) rotates around the base (6), causing the driven rod (32) to move upward, thereby driving the ejector rod (5) to push up and eject the concrete precast part (8) in the forming mold (2).

2. The automatic demoulding device for precast concrete parts according to claim 1 is characterized in that: A roller (51) is provided at the bottom end of the top rod (5).

3. The automatic demoulding device for precast concrete parts according to claim 2 is characterized in that: A top block (52) is provided at the top of the top rod (5), and the top block (52) is in the shape of a trumpet that is larger at the top and smaller at the bottom.

4. The automatic demoulding device for precast concrete parts according to claim 3 is characterized in that: A limiting slider (53) is provided on the side of the top rod (5), and correspondingly, a notch (101) for the limiting slider (53) to pass through is provided on the top plate of the support frame (1).

5. The automatic demoulding device for precast concrete parts according to claim 1, characterized in that: Two V-shaped connecting rods (3) are respectively provided on both sides of the cylinder (4).

6. The automatic demoulding device for precast concrete parts according to claim 5, characterized in that: A fixing ring (7) is provided at the end of the piston rod (41); four connecting blocks (71) are arranged at intervals on the outer circumference of the fixing ring (7); a sliding shaft is provided on the connecting block (71); a long waist hole (311) is provided on the driving rod (31); the sliding shaft cooperates with the long waist hole (311) and can slide in the long waist hole (311).

7. The automatic demoulding device for precast concrete parts according to claim 1, characterized in that: Two inverted L-shaped limiting rods (11) are symmetrically arranged on the top of the support frame (1), and the forming mold (2) is inserted between the two limiting rods (11).

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