A top mold frame for a mold for forming piles

Abstract

The present invention relates to a top formwork frame of a mold for forming piles, the top formwork frame is located at the upper part of the mold cavity of the mold, and the top formwork frame includes two plates that are arranged oppositely and flush, the length direction of the two plates extending along the length direction of the mold cavity, a scraper path reference portion extending along the length direction is formed on each plate, and a strip hollow area for partially inserting a scraper is formed between the two scraper path reference portions, and the two ends of the scraper are respectively against the scraper path reference portions corresponding thereto and move along the strip hollow area to flatten the top surface of the pile to be formed. In this way, the two sides of the strip hollow area provide support for the scraper and serve as a reference for the scraping depth of the scraper; when processing the top surface of the pile to be formed, it is only necessary to move the scraper along the strip hollow area, that is, the concrete top surface corresponding to the strip hollow area can be flush with the concrete top surface located at the plate, and compared with the repair method in the background technology, the efficiency is high and the flatness of the top surface of the formed pile is high.

Description

Technical Field

[0001] The invention relates to the technical field of building moulds, in particular to a top mould frame of a mould for forming piles. Background Art

[0002] Precast concrete square piles refer to square concrete piles produced using professional molds. The construction quality is easier to ensure than cast-in-place piles. Square concrete piles are important pile foundation materials in my country's civil engineering foundation projects. With the vigorous development of the construction industry, precast concrete square piles with fast construction speed are a type of concrete product with a larger output among my country's precast components.

[0003] At present, the mold of the square pile mainly includes a bottom template and two side templates arranged relatively along the width direction of the bottom template. The side template and the bottom template are connected to form an open mold cavity. For example, the "Mold for Prestressed and Non-prestressed Concrete Solid Square Piles" disclosed in the Chinese utility model patent with patent number ZL201320633720.2 (publication number CN203485297U) includes a left steel plate (i.e., side template), a right steel plate (i.e., side template) and a bottom steel plate (i.e., bottom template). The bottom of the right steel plate is welded and fixed to the right end of the bottom steel plate, a threaded hole is provided at the left end of the bottom steel plate, and an adjusting screw hole is provided at the bottom of the left steel plate. The bottom of the left steel plate is movably connected to the bottom steel plate by bolts.

[0004] When the above-mentioned mold is used to produce square piles, concrete is usually injected into the mold cavity, and then the concrete in the mold is vibrated by a vibrator to make it dense and uniform. The unevenness of the top surface of the pile to be formed is then smoothed out by a tool. It is completely dependent on the technicians' visual observation and experience to judge whether the smoothing is done, and it is difficult to ensure the flatness of the top surface of the pile to be formed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a top mold frame for a mold for forming piles, which can make the top surface of the formed piles have high flatness, in view of the current status of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a top mold frame of a mold for forming piles, the top mold frame is located at the upper part of the mold cavity of the mold, and the top mold frame includes two oppositely arranged and flush plates, the length direction of the two plates extends along the length direction of the mold cavity, and each of the plates is formed with a scraper path reference portion extending along its length direction, and a strip-shaped hollow area for partially inserting a scraper is formed between the two scraper path reference portions, and the two ends of the scraper are respectively abutted on the corresponding scraper path reference portions and move along the strip-shaped hollow area to scrape the top surface of the pile to be formed.

[0007] In order to ensure that the top mold frame and the mold are well matched, the top mold frame also includes two side plates arranged opposite to each other, and the two side plates are respectively arranged on the two plates, and the inner edge of each plate extends out of the side plate to form the scraper path reference edge. The side plate is arranged to facilitate the taking and placing of the plate, and the side plate can serve as a reference. When the side plate is placed in place, the plate is placed in place.

[0008] In order to enable the top mold frame to cooperate with the mold to produce variable-section square piles, the outer edge of each plate extends out of the side plate, and a convex portion facing the side wall of the mold cavity is convexly provided at the outer edge, and both sides of the convex portion in the length direction are inclined surfaces inclined toward the strip-shaped hollow area, and the aforementioned inclined surfaces extend toward the end of the plate. The mold for producing variable-section square piles will be provided with lining plates, and the convex portion is located between the two lining plates, so that the side surface of the formed square pile is a concave-convex surface; and the two sides of the convex portion are inclined surfaces, which cooperate with the inclined position on the lining plate to prevent slurry leakage and facilitate demoulding.

[0009] In order to reinforce the top formwork, the top formwork further comprises at least one first connecting rod arranged between the two side plates. The first connecting rod plays a reinforcing role to prevent the two side plates from being deformed outwards due to external forces.

[0010] In order to facilitate the positioning of the top mold frame, the first connecting rod is mounted on the upper end surfaces of the two side plates, and both ends of the first connecting rod extend out of the side plates and are correspondingly installed on the mold. In this way, when the first connecting rod is assembled on the mold, the top mold frame is installed in place and will not be displaced relative to the mold cavity.

[0011] In order to make the top mold frame adapt to molds of different specifications and sizes, the two plates can be moved closer or farther away from each other along the width direction of the mold cavity. In order to improve the versatility of the current mold and to be applicable to the production of piles of various specifications, at least one side mold plate can be moved relative to the bottom mold plate to adjust the size of the mold cavity. When the size of the mold cavity becomes larger, the two plates are moved away from each other, and when the size of the mold cavity becomes smaller, the two plates are moved closer to each other, that is, the distance between the two plates of the top mold frame is adjusted to adapt to the changing size of the mold cavity.

[0012] The top mold frame also includes at least one second connecting rod mounted on the upper end surfaces of the two side plates. The second connecting rod plays a reinforcing role to prevent the two side plates from being squeezed and deformed outward, and the length of the second connecting rod can be adjusted to adapt to the distance between the two plates.

[0013] In order to adjust the length of the second connecting rod, the second connecting rod includes two connecting rods that can move relatively in the length direction, one of the above-mentioned connecting rods is fixed to each of the side plates, the first end of each of the connecting rods is connected to the corresponding side plate, and the second ends of the two connecting rods are detachably connected at different positions in the length direction of the connecting rods. When the size of the top mold frame in the width direction needs to be adjusted, the second ends of the two connecting rods are connected at different positions, so that the total length of the second connecting rod can be adjusted.

[0014] Preferably, each connecting rod is provided with a positioning hole near the second end, one connecting rod has at least one positioning hole, and the other connecting rod has at least two positioning holes spaced apart in the width direction of the mold cavity, and two adjacent connecting rods are connected at one of the positioning holes by a connecting piece. The total length of the positioning piece can be adjusted by connecting two adjacent connecting rods at different positioning holes, and the length adjustment method is simple and quick.

[0015] In order to facilitate the positioning of the top mold frame, the first end of each connecting rod extends out of the side plate and is correspondingly installed on the mold. In this way, when the first end of the connecting rod is assembled on the mold, the top mold frame is installed in place and can prevent the top mold frame from being displaced relative to the mold cavity.

[0016] Compared with the prior art, the advantages of the present invention are as follows: 1. A strip-shaped hollow area for partially inserting a scraper is formed between the two relatively arranged plates of the present invention, and the two sides of the strip-shaped hollow area are respectively reference edges of the scraper path extending along the length direction of the strip-shaped hollow area, so that the two sides of the strip-shaped hollow area provide support for the scraper and serve as a reference for the scraping depth of the scraper; when processing the top surface of the pile to be formed, it is only necessary to move the scraper along the strip-shaped hollow area, so that the concrete top surface corresponding to the strip-shaped hollow area can be flush with the concrete top surface located at the plate, which is efficient and has high flatness of the formed pile top surface compared to the repair method in the background technology; 2. The two plates can be docked or separated in the width direction of the mold cavity to adapt to the different spacings between the two side mold plates, so that the top mold frame can adapt to mold cavities of different sizes, and there is no need to configure top mold frames of different specifications for molds of different sizes, which saves costs and has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the top mold frame of Example 1 of the present invention;

[0018] Figure 2 For application Figure 1 A schematic diagram of the structure of the mold of the top mold frame;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the support frame;

[0020] Figure 4This is an exploded schematic diagram of a top mold frame and a corresponding mold according to Example 2 of the present invention;

[0021] Figure 5 for Figure 4 A in the enlarged view;

[0022] Figure 6 for Figure 4 The enlarged view of point B in the figure;

[0023] Figure 7 It is a schematic structural diagram of the top mold frame of Example 3 of the present invention;

[0024] Figure 8 For application Figure 7 A schematic diagram of the structure of the mold of the top mold frame;

[0025] Fig. 9 for Figure 8 The enlarged view of point C in the figure;

[0026] Fig.10 It is a structural schematic diagram of the top mold frame of Example 4 of the present invention (the extension rod is in a docking state);

[0027] Fig.11 It is a schematic structural diagram of the top mold frame of Example 4 of the present invention (the extension rod is in a distanced state);

[0028] Fig.12 For application Fig.10 A schematic diagram of the structure of the mold of the top mold frame;

[0029] Fig.13 It is a schematic structural diagram of the top mold frame of Example 5 of the present invention (the extension rod is in a distanced state);

[0030] Fig.14 for Fig.13 A schematic diagram of a structure in which the positioning member is assembled on a mounting frame;

[0031] Fig.15 for Fig.14 A schematic diagram of the structure of the positioning member in FIG.

[0032] Fig.16 For application Fig.13 Schematic diagram of the structure of the mold of the top mold frame. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] like Figures 1 to 3As shown, the structure of the top mold frame 01 and a mold matched therewith is described in detail. In addition to the top mold frame 01 matched therewith, the mold also includes a bottom mold plate 6 and two side mold plates 7. The top mold frame 01 and the bottom mold plate 6 are arranged opposite to each other up and down, and the two side mold plates 7 are both arranged on the bottom mold plate 6 and are arranged opposite to each other along the width direction of the bottom mold plate 6. The bottom mold plate 6 and the two side mold plates 7 enclose a mold cavity 15 for forming a square pile 011, and the top mold frame 01 is located at the upper part of the mold cavity 15 of the mold.

[0036] The top mold frame 01 includes a plate 1, a side plate 3 and an extension rod 11, wherein the plate 1 is extended along the length direction of the mold cavity 15, and the lower end surface of the plate 1 is smooth and can be made of metal material, such as iron, steel, etc.

[0037] There are two plates 1 and they are arranged opposite to each other, and the two plates 1 are flush with each other, and the two plates 1 are in contact with two side templates 7 for support. There are two side plates 3 and they are arranged on the two plates 1 respectively, that is, each plate 1 is provided with a side plate 3, and the inner edge of each plate 1 extends out of the side plate 3 to form a scraper path reference part A (that is, each plate 1 forms a scraper path reference part A extending along its length direction), and the outer edge extends out of the side plate 3 and contacts the side template 7, where the inner side refers to the side close to the strip hollow area 13, and the outer side refers to the side away from the strip hollow area 13. A strip-shaped hollow area 13 is formed between the two scraper path reference parts A for the scraper 2 to be partially placed. The scraper 2 includes a scraper plate 21 and a resting part 22 formed on the upper part of the scraper plate 21. The two ends of the resting part 22 are respectively mounted on the upper end surface of the scraper path reference part A. The scraper plate 21 extends into the strip-shaped hollow area 13 and the lower end surface of the scraper plate 21 is flush with the lower end surface of the strip-shaped hollow area 13. The two ends of the scraper plate 21 are respectively against the corresponding scraper path reference parts A. After the scraper 2 moves along the strip-shaped hollow area 13 to flatten the top surface of the pile to be formed, the top surface of the concrete corresponding to the strip-shaped hollow area 13 can be flush with the top surface of the concrete at the plate 1.

[0038] The two plates 1 are arranged flush with each other so that the entire top surface of the square pile is flat after the scraper 2 is operated, otherwise the top surface of the square pile will be high on one side and low on the other side.

[0039] In addition, a plurality of first connecting rods 5a are provided between the two side panels 3 along the length direction of the side panels 3 at intervals, each first connecting rod 5a extends along the width direction of the strip-shaped hollow area 13, and the first connecting rods 5a are used to reinforce the top formwork 01.

[0040] In this embodiment, the two plates 1 are respectively the first plate 1a and the second plate 1b. Both ends of the length direction of the first plate 1a and the second plate 1b are provided with extension rods 11 facing the strip hollow area 13. The extension rod 11 at the head of the first plate 1a corresponds to the extension rod 11 at the head of the second plate 1b, and the extension rod 11 at the tail of the first plate 1a corresponds to the extension rod 11 at the tail of the second plate 1b. When the two corresponding extension rods 11 are located on the same straight line, the top mold frame 01 is placed in place. The setting of the extension rod 11 allows the two plates 1 to be set correspondingly to prevent the two ends of the two plates 1 from misaligning. In this embodiment, the two corresponding extension rods 11 are integrally formed, that is, when the top mold frame 01 is manufactured, the two plates 1 are set correspondingly.

[0041] Through the structure of the above-mentioned top formwork frame 01, the top surface of the pile can be set by the following method: 1. First, place the top formwork frame 01 into the mold cavity 15 and put it in place; 2. Pour enough concrete into the mold cavity 15 through a distribution device (such as a distribution vehicle), and vibrate the concrete in the mold to make it dense and uniform through a vibrator; 4. Manually move the scraper 2 to move the scraper 2 along the length direction of the strip-shaped hollow area 13, and move the scraper 2 along the scraper path reference part A to flatten the concrete on the upper part of the mold cavity 15, so that the top surface of the concrete corresponding to the strip-shaped hollow area 13 can be flush with the top surface of the concrete at the plate 1, and finally make the top surface of the formed square pile 011 flat; and during the movement of the scraper 2, the material scraped from the position with more filler can be filled into the position with less filler.

[0042] In addition, if Figure 3 As shown, one of the side templates 7 of the present embodiment can be moved along the bottom template 6 in the following manner. After the side template 7 moves, the lateral width of the mold cavity 15 of the mold increases or decreases. For this purpose, it is necessary to configure a top mold frame 01 with an enlarged lateral dimension or a top mold frame 01 with a reduced lateral dimension. The following specific structure supports the movement of the side template 7 relative to the bottom template 6. A plurality of spaced support frames 61 are provided along the length direction of the bottom template 6. Each support frame 61 includes a support plate 611 supported at the bottom of the bottom template 6 and two reinforcing plates 612 connected to the support plate 611. The support plate 611 extends along the width direction of the bottom template 6. Each side template 7 is connected to a reinforcing plate 612 arranged on its outer side, and one of the reinforcing plates 612 can move relative to the support plate 611 along the width direction of the bottom template 6. The side template 7 connected to the reinforcing plate 612 can also move along the bottom template 6.

[0043] The end of the support plate 611 is provided with a plurality of second positioning holes 613 spaced apart along the sliding direction of the reinforcing plate 612, and the support plate 611 is formed with a groove channel 614 in the area where the second positioning holes 613 are located. The movable reinforcing plate 612 is arranged in the corresponding groove channel 614 and can move along the groove channel 614, and a connecting piece 615 (such as a pin) that can be pressed against the end surface of the reinforcing plate 612 facing the side template 7 is inserted in the second positioning hole 613.

[0044] On the side of the movable reinforcing plate 612, a vertical plate 616 parallel to the corresponding side template 7 is fixed on the support plate 611, and the vertical plate 616 and the side template 7 are separated on both sides of the reinforcing plate 612. A transverse abutment rod 617 is arranged between the vertical plate 616 and the reinforcing plate 612. The transverse abutment rod 617 is screwed with the vertical plate 616, and the screwing direction of the two is perpendicular to the direction of the vertical plate 616, and one end face of the transverse abutment rod 617 abuts against the end face of the reinforcing plate 612 facing away from the side template 7. The transverse abutment rod 617 can be simply selected as a bolt or a screw, or a flat plate with an increased abutment area can be arranged on the abutment surface with the reinforcing plate 612 to expand the abutment stability, etc. These simple deformations of the transverse abutment rod 617 are all within the protection scope of the present invention.

[0045] When the position of the reinforcing plate 612 needs to be adjusted and moved, the connecting member 615 is inserted into the second positioning hole 613 at a different position, and the transverse abutment rod 617 maintains the abutment state with the first vertical rod by screwing with the vertical plate 616 .

[0046] Alternatively, a connection hole corresponding to the second positioning hole 613 may be provided on the reinforcing plate 612 , and the connecting member 615 is inserted into the connection hole and the second positioning hole 613 .

[0047] Example 2

[0048] like Figures 4 to 6 As shown, the difference between Example 2 and Example 1 is that the outer edge of the scraper path reference portion A extends out of the side plate 3 and is provided with a plurality of protrusions 31 at intervals along the length direction.

[0049] The two sides of the convex part 31 in the length direction are inclined surfaces 311 inclined toward the strip hollow area 13, and the aforementioned inclined surfaces 311 extend toward the end of the corresponding plate 1. Because a plurality of lining plates are arranged in the mold cavity 15 along its length direction, the formed square pile 011 has a contraction section (the cross-sectional dimension at the contraction section is smaller than the cross-sectional dimension at other positions of the pile body). Each lining plate includes a side lining plate 8 arranged on the side template 7 and a bottom lining plate arranged on the bottom template 6. The side lining plate 8 includes a side lining plate body 81 arranged parallel to the side template 7 and a connecting portion 82 formed on both sides of the side lining plate body 81. The connecting portion 82 extends away from the side lining plate body 81 and is inclined toward the corresponding side template 7. When the top mold frame 01 is placed on the mold cavity 15, the protrusion 31 is located between two adjacent side lining plates 8 and contacts the side mold plate 7 on the corresponding side, and the inclined surface 311 on the protrusion 31 abuts against the connecting portion 82, so that the top mold frame 01 and the side lining plates 8 have good sealing properties to prevent slurry leakage, and the inclined surface cooperation between the side lining plates 8 and the inclined surface 311 also facilitates demoulding, and the side plate 3 abuts against the side lining plates 8 on the corresponding side mold plate 7. The structure of the top mold frame 01 makes the side surface of the formed square pile 011 concave and convex.

[0050] Example 3

[0051] like Figures 7 to 9 As shown, the difference between Embodiment 3 and Embodiment 1 is that the first connecting rod 5 a of this embodiment extends out of the side plate 3 .

[0052] The first connecting rods 5a are mounted on the upper end surfaces of the two side panels 3, and each first connecting rod 5a extends along the width direction of the strip hollow area 13, playing the role of reinforcing the two side panels 3. The middle part of the first connecting rod 5a is fixedly connected to the two side panels 3, and both ends of the first connecting rod 5a extend out of the side panels 3. The two side mold plates 7 are provided with mounting frames 9 for the two ends of the first connecting rod 5a to be installed accordingly. The first connecting rod 5a can play the role of positioning the top mold frame 01 to prevent the top mold frame 01 from being displaced in the mold cavity 15.

[0053] In this embodiment, a mounting groove 91 is provided on the mounting frame 9, and the first connecting rod 5a can be inserted into the mounting groove 91 from top to bottom. Of course, the first connecting rod 5a can also be installed on the mounting frame 9 in other forms. For example, the first connecting rod 5a is installed on the mounting frame 9 by a buckle structure. In this way, not only can the first connecting rod 5a be disassembled, but also when the first connecting rod 5a is assembled on the mounting frame 9, since the first connecting rod 5a cannot move axially, it can also prevent the side formwork 7 from being expanded by concrete and deformed outward, thereby reinforcing the mold.

[0054] Of course, a convex portion 31 may also be provided on the top formwork 01 as shown in Example 2 to produce variable-section square piles.

[0055] Example 4

[0056] like Figures 10-12 As shown, the difference between Example 4 and Example 3 is that: a. the size of the top mold frame 01 in the width direction can be adjusted; b. the length of the second connecting rod 5b can be adjusted to adapt to the distance between the two side mold plates 7. These two distinguishing features enable the top mold frame 01 of this embodiment to adapt to molds of different sizes, and the second connecting rod 5b is extended along the width direction of the mold cavity 15.

[0057] The two plates 1 can be moved closer to or farther from each other, and the two plates 1 can be moved manually or by mechanical equipment to adjust the distance between them. The extension rod 11 of the first plate 1a and the extension rod 11 of the second plate 1b are designed separately. The extension rod 11 at the head of the first plate 1a and the extension rod 11 at the head of the second plate 1b are always located on the same straight line and can be correspondingly docked or moved away in the width direction of the mold. The extension rod 11 at the tail of the first plate 1a and the extension rod 11 at the tail of the second plate 1b are always located on the same straight line and can be correspondingly docked or moved away in the width direction of the mold, so that the size of the top mold frame 01 in the width direction can be adjusted.

[0058] The length of the second connecting rod 5b can be adjusted to fit the spacing between the two side templates 7: the second connecting rod 5b includes two connecting rods 51 that can move relative to each other in the length direction, one of the above-mentioned connecting rods 51 is correspondingly fixed on each side plate 3, the first end of each connecting rod 51 is correspondingly mounted on the mounting frame 9 on the corresponding side template 7, and a first positioning hole 511 is provided at a position adjacent to the second end of each connecting rod 51, the number of the first positioning holes 511 on one connecting rod 51 is at least one, the number of the first positioning holes 511 on the other connecting rod 51 is at least two and is spaced apart along the length direction of the connecting rod 51, and two adjacent connecting rods 51 are connected at one of the first positioning holes 511 by a connecting member (such as a pin), and the total length of the second connecting rod 5b is adjusted by connecting the two connecting rods 51 at the first positioning holes 511 at different positions. In this embodiment, each connecting rod 51 includes a first rod 51a and a second rod 51b that are connected, the first rod 51a is mounted on the mounting frame 9, and the first positioning hole 511 is opened on the second rod 51b.

[0059] Of course, the convex portion 31 may also be provided as shown in Example 2 to produce a variable cross-section square pile.

[0060] Example 5

[0061] like Figures 13-16 As shown, the difference between Example 5 and Example 4 is that the first end of each connecting rod 51 can be detachably installed at a different height position of the corresponding mounting frame 9, and the structure of the mounting frame 9 is different from that of Example 4.

[0062] At least two steps 91 are provided on the mounting frame 9 in the height direction, and a placing portion 512 that can be placed on the step 91 is provided at the first end of each connecting rod 51. By placing the placing portion 512 on steps 91 of different heights, the installation height of the second connecting rod 5b can be adjusted. In addition, a slot 911 for inserting the corresponding connecting rod 51 is provided at each step 91, and a convex portion 513 that can be inserted and limited in the slot 911 is provided on each connecting rod 51. Specifically, the convex portion 513 is provided on the first rod 51a.

[0063] Of course, the convex portion 31 may also be provided as shown in Example 2 to produce a variable cross-section square pile.

Claims

1. A top mold frame of a mold for forming piles, the top mold frame (01) is located at the upper part of the mold cavity (15) of the mold, characterized in that: The top mold frame (01) comprises two plates (1) which are arranged opposite to each other and are flush with each other. The length direction of the two plates (1) extends along the length direction of the mold cavity (15). A scraper path reference part (A) extending along the length direction is formed on each plate (1). A strip-shaped hollow area (13) for partially inserting a scraper (2) is formed between the two scraper path reference parts (A). The two ends of the scraper (2) respectively abut against the corresponding scraper path reference parts (A) and move along the strip-shaped hollow area (13) to flatten the top surface of the pile to be formed. The top mold frame (01) further comprises two side plates (3) arranged opposite to each other, the two side plates (3) being arranged on the two plates (1) respectively, and the inner edge of each plate (1) extending out of the side plate (3) to form the scraper path reference portion (A); The outer edge of each plate (1) extends outward from a side plate (3), and a convex portion (31) facing the side wall of the mold cavity is provided at the outer edge thereof, and both sides of the convex portion (31) in the length direction are inclined surfaces (311) inclined toward the strip-shaped hollow area (13), and the inclined surfaces (311) extend toward the end of the corresponding plate (1); The top mold frame (01) further comprises at least one first connecting rod (5a) arranged between the two side plates (3); The first connecting rod (5a) is mounted on the upper end surfaces of the two side plates (3), and both ends of the first connecting rod (5a) extend out of the side plates (3) and are correspondingly mounted on the mold; Alternatively, the top mold frame (01) further comprises at least one second connecting rod (5b) mounted between the two side plates (3), both ends of the second connecting rod (5b) extending out of the side plates (3) and correspondingly mounted on the mold, and the length of the second connecting rod (5b) is adjustable.

2. The top mold frame of the mold for forming piles according to claim 1, characterized in that: The two plates (1) can move closer to or farther from each other along the width direction of the mold cavity (15).

3. The top mold frame of the mold for forming piles according to claim 1, characterized in that: The second connecting rod (5b) comprises two connecting rods (51) which can move relative to each other in the length direction. One of the connecting rods (51) is correspondingly fixed on each of the side plates (3). The first end of each of the connecting rods (51) is connected to the corresponding side plate (3). The second ends of the two connecting rods (51) are detachably connected at different positions in the length direction of the connecting rods (51).

4. The top mold frame of the mold for forming piles according to claim 3, characterized in that: A positioning hole (511) is provided at a position adjacent to the second end of each connecting rod (51), wherein the number of the positioning holes (511) on one connecting rod (51) is at least one, and the number of the positioning holes (511) on the other connecting rod (51) is at least two and are spaced apart along the length direction of the connecting rod (51), and two adjacent connecting rods (51) are connected at one of the positioning holes (511) via a connecting piece.

5. The top mold frame of the mold for forming piles according to claim 3, characterized in that: The first end of each connecting rod (51) extends out of the side plate (3) and is correspondingly mounted on the mold.

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