CN114179199B

CN114179199B - Stair step mold

Info

Publication number: CN114179199B
Application number: CN202111537883.6A
Authority: CN
Inventors: 段晓录; 杨建祥; 李东方
Original assignee: Hebei Jingtong Building Technology Corp
Current assignee: Hebei Jingtong Building Technology Corp
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2023-03-31
Anticipated expiration: 2041-12-15
Also published as: CN114179199A

Abstract

The invention provides a stair tread mold which comprises a first side mold, a second side mold, a third side mold, a fourth side mold and two end molds, wherein the first side mold is connected with the second side mold; the first side die is provided with a first die surface and a second die surface, the first die surface is vertically arranged, and the second die surface is horizontally arranged at the lower side of the first die surface; the second side die is arranged opposite to the first side die, the second side die is provided with a third die surface and a fourth die surface, and the fourth die surface is horizontally arranged on the upper side of the third die surface; the third side die is arranged at the lower side of the second die surface and is provided with a fifth die surface; the fourth side die is arranged on the upper side of the fourth die surface and is provided with a sixth die surface; each end die is provided with a seventh die surface, the seventh die surface is Z-shaped, and the two end dies are symmetrically arranged at two ends of the first side die and the second side die; the stair tread mold provided by the invention can be used for pouring cuboid stair treads, L-shaped stair treads and Z-shaped stair treads.

Description

Stair step mold

Technical Field

The invention belongs to the technical field of prefabricated part molds, and particularly relates to a stair step mold.

Background

The prefabricated stair step of the prefabricated stair is a cuboid, and after the prefabricated stair step is assembled, a certain interval is formed between every two adjacent stair steps, so that potential safety hazards exist.

For this purpose, the applicant designs a Z-shaped prefabricated stair step and an L-shaped prefabricated stair step, wherein the Z-shaped prefabricated stair step is provided with a horizontally arranged tread and two skirts vertical to the tread, and the two skirts are diagonally arranged on the upper side and the lower side of the tread and form a Z shape with the tread; the L-shaped prefabricated stair step is provided with a horizontally arranged tread and a kicking surface vertical to the tread; the Z-shaped prefabricated stair step and the L-shaped prefabricated stair step have the advantages that the space between two adjacent stair steps can be eliminated through the skirting surfaces, but the Z-shaped prefabricated stair step and the L-shaped prefabricated stair step are not poured in the prior art.

Disclosure of Invention

The embodiment of the invention provides a stair step mold, and aims to provide a mold capable of pouring Z-shaped prefabricated stair steps and L-shaped prefabricated stair steps.

In order to achieve the purpose, the invention adopts the technical scheme that: provided is a stair tread mold, comprising:

the first side die is provided with a first die surface and a second die surface, the first die surface is vertically arranged, the second die surface is horizontally arranged on the lower side of the first die surface, and the edge of the first die surface is connected with the edge of the second die surface;

the second side die is arranged opposite to the first side die and provided with a third die surface and a fourth die surface, the third die surface is vertically arranged and opposite to the first die surface, the fourth die surface is horizontally arranged on the upper side of the third die surface, and the edge of the third die surface is connected with the edge of the fourth die surface;

the third side die is arranged on the lower side of the second die surface, is connected with the first side die and is provided with a fifth die surface, the fifth die surface is vertical to the second die surface, and the third side die is in sliding connection with the first side die;

the fourth side die is arranged on the upper side of the fourth die surface, is connected with the second side die and is provided with a sixth die surface, the sixth die surface is vertical to the fourth die surface, and the fourth side die is in sliding connection with the second side die;

the two end dies are symmetrically arranged at two ends of the first side die and the second side die and are respectively connected with the first side die and the second side die, and the seventh die surfaces are respectively contacted with and vertical to the first die surface, the second die surface, the third die surface, the fourth die surface, the fifth die surface and the sixth die surface;

the third side die and the fourth side die are arranged between the two end dies, and two ends of the third side die and the fourth side die are respectively connected with the two end dies in a sliding manner;

when the fifth mould surface is aligned with the first mould surface and the sixth mould surface is aligned with the third mould surface, a cavity corresponding to the cuboid precast stair step is formed among the first mould surface, the third mould surface, the fourth mould surface, the fifth mould surface, the sixth mould surface and the two seventh mould surfaces;

sliding the fourth side die outwards relative to the second side die to enable the fifth die surface to be aligned with the first die surface and the sixth die surface to be positioned on the outer side of the third die surface, wherein at the moment, a cavity corresponding to the L-shaped prefabricated stair step is formed among the first die surface, the third die surface, the fourth die surface, the fifth die surface, the sixth die surface and the two seventh die surfaces;

and then the third side die slides outwards relative to the first side die, so that the fifth die surface is positioned on the outer side of the first die surface, the sixth die surface is positioned on the outer side of the third die surface, and at the moment, a cavity corresponding to the Z-shaped prefabricated stair step is formed between the first die surface, the third die surface, the fourth die surface, the fifth die surface, the sixth die surface and two seventh die surfaces.

In a possible implementation mode, still include a plurality of bolts and with a plurality of nuts of bolt complex, first side form the second side form the third side form the fourth side form and two through a plurality of between the end mould bolt and a plurality of the nut cooperation is connected together.

In a possible implementation manner, the third side die and the fourth side die are provided with first long holes, the second die surface and the fourth die surface are provided with second long holes, a central line of each first long hole is perpendicular to the first die surface, a central line of each second long hole is parallel to the first die surface, and the plurality of bolts respectively penetrate through the plurality of first long holes and the plurality of second long holes to fasten the third side die to the second die surface and fasten the fourth side die to the fourth die surface.

In a possible implementation mode, be equipped with a plurality of first connecting holes on the first die face, be equipped with a plurality of second connecting holes on the third die face, every all be equipped with on the end mould respectively with first connecting hole with third connecting hole and fourth connecting hole that the second connecting hole corresponds, it is a plurality of the bolt passes a plurality of respectively in proper order first connecting hole and a plurality of the third connecting hole is connected with a plurality of the nut cooperation, and is a plurality of the bolt passes a plurality of respectively in proper order second connecting hole and a plurality of the fourth connecting hole, with a plurality of the nut cooperation is connected.

In a possible implementation manner, each end die is provided with a plurality of adjusting plates, the plurality of adjusting plates correspond to the first connecting holes and the second connecting holes respectively and are connected with the end die, each adjusting plate is provided with a plurality of adjusting holes corresponding to the first connecting holes or the second connecting holes, and a preset distance is arranged between every two adjacent adjusting holes; the third side mould with fourth side mould all includes first basis side mould, second basis side mould and a plurality of regulation side mould, and is a plurality of the side mould of adjusting is established first basis side mould with between the second basis side mould, a plurality of first slot hole is established first basis side mould with on the second basis side mould, it is a plurality of the bolt passes a plurality of respectively first slot hole with the second slot hole will first basis side mould with the second basis side mould fastens to the second die surface perhaps on the fourth die surface, if the pole adjust the side mould clamp and establish first basis side mould with between the second basis side mould.

In a possible implementation, every adjust one side of side form with constant head tank has all been seted up to first basis side form one side, every adjust the opposite side of side form with one side of second basis side form all is equipped with the locating piece, the locating piece with the constant head tank cooperation is in order to inject a plurality of adjust between the side form and adjust the side form with first basis side form with relative position on the horizontal direction between the second basis side form.

In a possible implementation mode, still include a plurality of adapter sleeves, a plurality of fastening screw and connecting rod, a plurality of adapter sleeves respectively with first basis side form, second basis side form and a plurality of regulation side form fixed connection, the connecting rod passes in proper order the adapter sleeve, a plurality of fastening screw pass respectively the adapter sleeve the lateral wall with the connecting rod butt.

In a possible implementation manner, a plurality of mounting holes are formed in the seventh die surface of each end die and used for mounting the thread sleeves pre-buried in the steps.

In a possible implementation manner, the first side mold further comprises an anti-skid stripe mold, and the anti-skid stripe mold is connected with the first mold surface of the first side mold, so that anti-skid stripes are formed on the Z-shaped prefabricated stair steps.

In a possible implementation manner, a plurality of reinforcing plates are arranged on the outer sides of the first side die and the second side die.

The stair tread mold provided by the invention has the beneficial effects that: compared with the prior art, the stair tread mold provided by the invention comprises a first side mold, a second side mold, a third side mold, a fourth side mold and two end molds, wherein the third side mold and the fourth side mold are arranged between the two end molds, and two ends of the third side mold and the fourth side mold are respectively in sliding connection with the two end molds; the fourth side die slides outwards relative to the second side die, so that the fifth die surface is aligned with the first die surface, the sixth die surface is positioned on the outer side of the third die surface, and at the moment, a cavity corresponding to the L-shaped prefabricated stair step is formed among the first die surface, the third die surface, the fourth die surface, the fifth die surface, the sixth die surface and the two seventh die surfaces, so that the L-shaped prefabricated stair step can be poured; the third side die is slid outwards relative to the first side die, so that the fifth die surface is positioned on the outer side of the first die surface, the sixth die surface is positioned on the outer side of the third die surface, and at the moment, a cavity corresponding to the Z-shaped prefabricated stair step is formed among the first die surface, the third die surface, the fourth die surface, the fifth die surface, the sixth die surface and the two seventh die surfaces, so that the Z-shaped prefabricated stair step can be poured; the stair step mold provided by the invention can be used for respectively pouring and molding a rectangular prefabricated stair step, an L-shaped prefabricated stair step and a Z-shaped prefabricated stair step.

Drawings

Fig. 1 is a schematic front view of a stair step mold according to an embodiment of the present invention;

FIG. 2 is an exploded view of a stair tread mold according to an embodiment of the present invention;

FIG. 3 is an enlarged view of part A of FIG. 2;

description of reference numerals:

10. a first side mold; 11. A first die face; 12. A second die face; 13. A second long hole;

14. a first connection hole; 15. An anti-skid stripe mold; 16. A reinforcing plate; 20. A second side mold;

21. a third die face; 22. A fourth die face; 23. A second connection hole; 30. A third side die;

31. a fifth die face; 32. A first long hole; 33. A first base side form; 34. A second base side form;

35. adjusting the side die; 36. Positioning a groove; 37. Positioning blocks; 40. A fourth side die;

41. a sixth die face; 50. End die; 51. A seventh die face; 52. A third connection hole;

53. a fourth connection hole; 54. An adjusting plate; 55. An adjustment hole; 56. Mounting holes;

60. a bolt; 61. A nut; 70. Connecting sleeves; 71. A fastening screw;

72. a connecting rod.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 3 together, the stair step mold provided by the present invention will now be described. The stair step mold comprises a first side mold 10, a second side mold 20, a third side mold 30, a fourth side mold 40 and two end molds 50; the first side die 10 is provided with a first die surface 11 and a second die surface 12, the first die surface 11 is vertically arranged, the second die surface 12 is horizontally arranged at the lower side of the first die surface 11, and the edge of the first die surface 11 is connected with the edge of the second die surface 12; the second side die 20 is arranged opposite to the first side die 10, the second side die 20 is provided with a third die surface 21 and a fourth die surface 22, the third die surface 21 is vertically arranged and opposite to the first die surface 11, the fourth die surface 22 is horizontally arranged on the upper side of the third die surface 21, and the edge of the third die surface 21 is connected with the edge of the fourth die surface 22; the third side die 30 is arranged on the lower side of the second die surface 12, is connected with the first side die 10 and is provided with a fifth die surface 31, the fifth die surface 31 is vertical to the second die surface 12, and the third side die 30 is connected with the first side die 10 in a sliding way; the fourth side die 40 is arranged on the upper side of the fourth die surface 22, is connected with the second side die 20 and is provided with a sixth die surface 41, the sixth die surface 41 is vertical to the fourth die surface 22, and the fourth side die 40 is connected with the second side die 20 in a sliding manner; each end die 50 of the two end dies 50 is provided with a seventh die surface 51, the seventh die surfaces 51 are Z-shaped, the two end dies 50 are symmetrically arranged at two ends of the first side die 10 and the second side die 20 and are respectively connected with the first side die 10 and the second side die 20, and the seventh die surfaces 51 are respectively in contact with and perpendicular to the first die surface 11, the second die surface 12, the third die surface 21, the fourth die surface 22, the fifth die surface 31 and the sixth die surface 41; the third side die 30 and the fourth side die 40 are disposed between the two end dies 50, and both ends of the third side die are slidably connected to the two end dies 50.

When the fifth die surface 31 is aligned with the first die surface 11 and the sixth die surface 41 is aligned with the third die surface 21, a cavity corresponding to the cuboid prefabricated stair step is formed among the first die surface 11, the third die surface 21, the fourth die surface 22, the fifth die surface 31, the sixth die surface 41 and the two seventh die surfaces 51.

And sliding the fourth side die 40 outwards relative to the second side die 20 to enable the fifth die surface 31 to be aligned with the first die surface 11, and enabling the sixth die surface 41 to be located outside the third die surface 21, wherein cavities corresponding to the L-shaped prefabricated stair steps are formed among the first die surface 11, the third die surface 21, the fourth die surface 22, the fifth die surface 31, the sixth die surface 41 and the two seventh die surfaces 51.

And sliding the third side die 30 outwards relative to the first side die 10 to enable the fifth die surface 31 to be positioned on the outer side of the first die surface 11 and the sixth die surface 41 to be positioned on the outer side of the third die surface 21, and at this time, a cavity corresponding to the Z-shaped prefabricated stair step is formed among the first die surface 11, the third die surface 21, the fourth die surface 22, the fifth die surface 31, the sixth die surface 41 and the two seventh die surfaces 51.

The beneficial effect of the stair tread mould that this embodiment provided is: compared with the prior art, the stair step mold provided by the embodiment comprises a first side mold 10, a second side mold 20, a third side mold 30, a fourth side mold 40 and two end molds 50, wherein the third side mold 30 and the fourth side mold 40 are arranged between the two end molds 50, two ends of the third side mold 30 and the fourth side mold 40 are respectively connected with the two end molds 50 in a sliding manner, the fifth mold surface 31 is aligned with the first mold surface 11, the sixth mold surface 41 is aligned with the third mold surface 21 by moving the third side mold 30 and the fourth side mold 40, and cavities corresponding to the cuboid stair step are formed among the first mold surface 11, the third mold surface 21, the fourth mold surface 22, the fifth mold surface 31, the sixth mold surface 41 and the two seventh mold surfaces 51, so that the cuboid stair step can be poured; the fourth side die 40 slides outwards relative to the second side die 20, so that the fifth die surface 31 is aligned with the first die surface 11, the sixth die surface 41 is positioned outside the third die surface 21, and at this time, a cavity corresponding to the L-shaped prefabricated stair step is formed among the first die surface 11, the third die surface 21, the fourth die surface 22, the fifth die surface 31, the sixth die surface 41 and the two seventh die surfaces 51, so that the L-shaped prefabricated stair step can be poured; the third side die 30 is slid outwards relative to the first side die 10, so that the fifth die surface 31 is positioned on the outer side of the first die surface 11, the sixth die surface 41 is positioned on the outer side of the third die surface 21, and at the moment, a cavity corresponding to the Z-shaped prefabricated stair step is formed among the first die surface 11, the third die surface 21, the fourth die surface 22, the fifth die surface 31, the sixth die surface 41 and the two seventh die surfaces 51, so that the Z-shaped prefabricated stair step can be poured; the stair mould of marking time that both this embodiment provided can pour respectively that the shaping cuboid prefabricated stair is marked time, L shape prefabricated stair are marked time and the prefabricated stair of Z shape are marked time.

As shown in fig. 1 to fig. 2, in a specific embodiment, the formwork further includes a plurality of bolts 60 and a plurality of nuts 61 engaged with the plurality of bolts 60, the first side formwork 10, the second side formwork 20, the third side formwork 30, the fourth side formwork 40 and the two end formworks 50 are engaged and connected together through the plurality of bolts 60 and the plurality of nuts 61, and the bolts 60 and the nuts 61 are connected and fastened, so that the formwork is not easily opened by the extrusion of concrete during casting, and the formwork is conveniently removed after casting.

As shown in fig. 1 to 2, in a specific embodiment, the third side die 30 and the fourth side die 40 are provided with first long holes 32, the second die surface 12 and the fourth die surface 22 are provided with second long holes 13, a central line of each first long hole 32 is perpendicular to the first die surface 11, a central line of each second long hole 13 is parallel to the first die surface 11, a plurality of bolts 60 respectively pass through the plurality of first long holes 32 and the plurality of second long holes 13, the third side die 30 is fastened to the second die surface 12, and the fourth side die 40 is fastened to the fourth die surface 22.

Specifically, the first long hole 32 and the second long hole 13 may be rectangular through holes or oblong holes, the hole extending direction of the first long hole 32 is perpendicular to the first mold surface 11, the extending direction of the second long hole 13 is parallel to the first mold surface 11, and after the bolts 60 and the nuts 61 are loosened, the relative position of the third side mold 30 and the first side mold 10 and the relative position of the fourth side mold 40 and the second side mold 20 can be adjusted, so as to select to pour the rectangular prefabricated stair step, the L-shaped prefabricated stair step and the Z-shaped prefabricated stair step.

As shown in fig. 1 to 2, in a specific embodiment, a plurality of first connection holes 14 are formed in the first mold surface 11, a plurality of second connection holes 23 are formed in the third mold surface 21, each end mold 50 is provided with third connection holes 52 and fourth connection holes 53 corresponding to the first connection holes 14 and the second connection holes 23, a plurality of bolts 60 sequentially pass through the plurality of first connection holes 14 and the plurality of third connection holes 52 and are connected with a plurality of nuts 61 in a matching manner, and the plurality of bolts 60 sequentially pass through the plurality of second connection holes 23 and the plurality of fourth connection holes 53 and are connected with the plurality of nuts 61 in a matching manner, so as to tightly connect the end mold 50 with the first side mold 10 and the second side mold 20.

As shown in fig. 1 to 3, it should be noted that, a stair step usually has several different lengths, if a stair step of one length is equipped with a set of stair step molds, the production and manufacturing costs will be greatly increased, for this reason, several adjusting plates 54 are provided on each end mold 50, several adjusting plates 54 correspond to the first connecting holes 14 and the second connecting holes 23, and are both connected to the end mold 50, several adjusting holes 55 corresponding to the first connecting holes 14 or the second connecting holes 23 are provided on each adjusting plate 54, and a preset distance is provided between two adjacent adjusting holes 55; the third side die 30 and the fourth side die 40 both comprise a first base side die 33, a second base side die 34 and a plurality of adjusting side dies 35, the plurality of adjusting side dies 35 are arranged between the first base side die 33 and the second base side die 34, the plurality of first long holes 32 are arranged on the first base side die 33 and the second base side die 34, the plurality of bolts 60 respectively penetrate through the plurality of first long holes 32 and the second long holes 13 to fasten the first base side die 33 and the second base side die 34 to the second die surface 12 or the fourth die surface 22, and if the rod adjusting side dies 35 are clamped between the first base side die 33 and the second base side die 34.

Specifically, the preset distance is determined according to actual requirements, the first base side die 33 and the second base side die 34 are matched with the plurality of adjusting side dies 35 to splice a third side die 30 and a fourth side die 40 with different lengths, then the end dies 50 are moved to align different adjusting hole 55 groups on the adjusting plates 54 with the third connecting holes 52 or the fourth connecting holes 53, so that the two end dies 50 are always connected with the two ends of the third side die 30 and the fourth side die 40, and stair steps with different lengths can be poured.

The stair tread mould that both this embodiment provided can pour out the stair of three kinds of different shapes, multiple different length and mark time.

As shown in fig. 1 to 3, in a specific embodiment, a positioning groove 36 is formed in one side of each adjusting side die 35 and one side of the first base side die 33, a positioning block 37 is arranged on the other side of each adjusting side die 35 and one side of the second base side die 34, and the positioning block 37 is matched with the positioning groove 36 to limit the relative positions of the adjusting side dies 35 and the first base side die 33 and the second base side die 34 in the horizontal direction.

Specifically, the positioning block 37 may be in the shape of a rectangular parallelepiped, a triangular prism, a semi-cylinder, or the like, and the shape of the positioning groove 36 matches the shape of the positioning block 37.

As shown in fig. 1 to 3, in a specific embodiment, the connecting device further includes a plurality of connecting sleeves 70, a plurality of fastening screws 71 and connecting rods 72, the plurality of connecting sleeves 70 are respectively and fixedly connected with the first base side mold 33, the second base side mold 34 and the plurality of adjusting side molds 35, the connecting rods 72 sequentially pass through the connecting sleeves 70, and the plurality of fastening screws 71 respectively pass through the side walls of the plurality of connecting sleeves 70 and abut against the connecting rods 72.

Specifically, in order to easily sleeve the connecting sleeve 70 on the connecting rod 72, the matching relationship between the connecting rod 72 and the connecting sleeve 70 is clearance fit, the fastening screw 71 penetrates through the side wall of the connecting sleeve 70 to abut against the connecting rod 72, and the connecting sleeve 70 is tightly connected with the connecting rod 72, so that the plurality of adjusting side molds 35 are tightly connected with the first base side mold 33 and the second base side mold 34, and the situation that the fifth mold surface 31 or the sixth mold surface 41 formed by the plurality of adjusting side molds 35, the first base side mold 33 and the second base side mold 34 is uneven to influence the pouring quality of the prefabrication step is avoided.

In one embodiment, as shown in fig. 1-2, the seventh surface 51 of each end form 50 is provided with a plurality of mounting holes 56 for mounting the threaded sleeves embedded in the steps.

Specifically, two mounting holes 56 are formed in each end mold 50, bolts 60 can penetrate through the mounting holes 56 and are in threaded connection with the embedded thread sleeves, the embedded thread sleeves are fixed to the end molds 50, the bolts 60 are screwed out of the embedded thread sleeves after pouring forming, and then mold stripping can be continued.

As shown in fig. 1 to 2, in a specific embodiment, the first side mold 10 further includes anti-skid stripe molds 15, and the anti-skid stripe molds 15 are connected to the first mold surface 11 of the first side mold 10, so that the Z-shaped prefabricated staircase steps are formed with anti-skid stripes.

Specifically, the anti-skid stripe mold 15 includes a plurality of rod members, each rod member is attached to and connected with the first side mold 10, so that a plurality of anti-skid stripes are formed on the tread of the stair step after pouring and molding.

As shown in fig. 1 to 2, in a specific embodiment, a plurality of reinforcing plates 16 are provided outside each of the first side mold 10 and the second side mold 20 to prevent the first side mold 10 and the second side mold 20 from being deformed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A stair tread mold, comprising:

the die comprises a first side die (10) and a second side die (12), wherein the first side die is provided with a first die surface (11) and a second die surface (12), the first die surface (11) is vertically arranged, the second die surface (12) is horizontally arranged on the lower side of the first die surface (11), and the edge of the first die surface (11) is connected with the edge of the second die surface (12);

the second side die (20) is arranged opposite to the first side die (10), the second side die (20) is provided with a third die surface (21) and a fourth die surface (22), the third die surface (21) is vertically arranged and is opposite to the first die surface (11), the fourth die surface (22) is horizontally arranged on the upper side of the third die surface (21), and the edge of the third die surface (21) is connected with the edge of the fourth die surface (22);

the third side die (30) is arranged on the lower side of the second die surface (12), is connected with the first side die (10), and is provided with a fifth die surface (31), the fifth die surface (31) is perpendicular to the second die surface (12), and the third side die (30) is connected with the first side die (10) in a sliding manner;

the fourth side die (40) is arranged on the upper side of the fourth die surface (22), is connected with the second side die (20) and is provided with a sixth die surface (41), the sixth die surface (41) is perpendicular to the fourth die surface (22), and the fourth side die (40) is in sliding connection with the second side die (20); and

the two end dies (50), each end die (50) is provided with a seventh die surface (51), the seventh die surfaces (51) are Z-shaped, the two end dies (50) are symmetrically arranged at two ends of the first side die (10) and the second side die (20) and are respectively connected with the first side die (10) and the second side die (20), and the seventh die surfaces (51) are respectively in contact with and perpendicular to the first die surface (11), the second die surface (12), the third die surface (21), the fourth die surface (22), the fifth die surface (31) and the sixth die surface (41);

the third side die (30) and the fourth side die (40) are arranged between the two end dies (50), and two ends of the third side die and the fourth side die are respectively connected with the two end dies (50) in a sliding manner;

when the fifth mould surface (31) is aligned with the first mould surface (11) and the sixth mould surface (41) is aligned with the third mould surface (21), a cavity corresponding to a cuboid prefabricated stair step is formed among the first mould surface (11), the third mould surface (21), the fifth mould surface (31), the sixth mould surface (41) and the two seventh mould surfaces (51);

sliding the fourth side die (40) outwards relative to the second side die (20) to enable the fifth die surface (31) to be aligned with the first die surface (11) and the sixth die surface (41) to be located outside the third die surface (21), wherein a cavity corresponding to the L-shaped prefabricated stair step is formed between the first die surface (11), the third die surface (21), the fourth die surface (22), the fifth die surface (31), the sixth die surface (41) and the two seventh die surfaces (51);

and then the third side die (30) slides outwards relative to the first side die (10), so that the fifth die surface (31) is positioned on the outer side of the first die surface (11), the sixth die surface (41) is positioned on the outer side of the third die surface (21), and at the moment, a cavity corresponding to the Z-shaped prefabricated stair step is formed between the first die surface (11), the second die surface (12), the third die surface (21), the fourth die surface (22), the fifth die surface (31), the sixth die surface (41) and the seventh die surfaces (51).

2. The stair tread mold according to claim 1, further comprising a plurality of bolts (60) and a plurality of nuts (61) engaged with the plurality of bolts (60), wherein the first side mold (10), the second side mold (20), the third side mold (30), the fourth side mold (40) and the two end molds (50) are engaged and connected together through the plurality of bolts (60) and the plurality of nuts (61).

3. The stair tread mold as claimed in claim 2, wherein the third side mold (30) and the fourth side mold (40) are provided with first long holes (32), the second mold surface (12) and the fourth mold surface (22) are provided with second long holes (13), the center line of each first long hole (32) is perpendicular to the first mold surface (11), the center line of each second long hole (13) is parallel to the first mold surface (11), a plurality of bolts (60) respectively pass through the first long holes (32) and the second long holes (13), the third side mold (30) is fastened to the second mold surface (12), and the fourth side mold (40) is fastened to the fourth mold surface (22).

4. The stair tread mold as claimed in claim 3, wherein a plurality of first connecting holes (14) are formed in the first mold surface (11), a plurality of second connecting holes (23) are formed in the third mold surface (21), each end mold (50) is provided with a third connecting hole (52) and a fourth connecting hole (53) corresponding to the first connecting hole (14) and the second connecting hole (23), a plurality of bolts (60) sequentially penetrate through the plurality of first connecting holes (14) and the plurality of third connecting holes (52) respectively and are in fit connection with a plurality of nuts (61), and a plurality of bolts (60) sequentially penetrate through the plurality of second connecting holes (23) and the plurality of fourth connecting holes (53) respectively and are in fit connection with a plurality of nuts (61).

5. The stair tread mold according to claim 4, wherein each of the end molds (50) is provided with a plurality of adjusting plates (54), a plurality of the adjusting plates (54) correspond to the first connecting holes (14) and the second connecting holes (23) respectively, and are connected to the end molds (50), each of the adjusting plates (54) is provided with a plurality of adjusting holes (55) corresponding to the first connecting holes (14) or the second connecting holes (23), and adjacent two adjusting holes (55) are spaced apart by a predetermined distance; third side mould (30) with fourth side mould (40) all include first basis side mould (33), second basis side mould (34) and a plurality of regulation side mould (35), and is a plurality of regulation side mould (35) are established first basis side mould (33) with between second basis side mould (34), it is a plurality of first slot hole (32) are established first basis side mould (33) with on second basis side mould (34), it is a plurality of bolt (60) pass a plurality of respectively first slot hole (32) with second slot hole (13) will first basis side mould (33) with second basis side mould (34) fasten to second die surface (12) or on fourth die surface (22), a plurality of regulation side mould (35) press from both sides first basis side mould (33) with between second basis side mould (34).

6. The stair tread mold as claimed in claim 5, wherein a positioning groove (36) is formed in one side of each adjusting side mold (35) and one side of the first base side mold (33), a positioning block (37) is arranged on the other side of each adjusting side mold (35) and one side of the second base side mold (34), and the positioning blocks (37) are matched with the positioning grooves (36) to limit the relative positions of the adjusting side molds (35) and the first base side mold (33) and the second base side mold (34) in the horizontal direction.

7. The stair step mold according to claim 6, further comprising a plurality of connecting sleeves (70), a plurality of fastening screws (71) and connecting rods (72), wherein the plurality of connecting sleeves (70) are fixedly connected with the first base side mold (33), the second base side mold (34) and the plurality of adjusting side molds (35) respectively, the connecting rods (72) sequentially penetrate through the connecting sleeves (70), and the plurality of fastening screws (71) respectively penetrate through a plurality of side walls of the connecting sleeves (70) to be abutted against the connecting rods (72).

8. A stair tread mold as claimed in claim 1, wherein a seventh mold surface (51) of each end mold (50) is provided with a plurality of mounting holes (56) for mounting threaded sleeves pre-embedded in the tread.

9. The stair tread mold of claim 1, wherein the first side mold (10) further comprises anti-skid stripe molds (15), the anti-skid stripe molds (15) being connected to the first mold surface (11) of the first side mold (10) to form anti-skid stripes on the Z-shaped prefabricated stair tread.

10. The stair tread mold according to claim 1, wherein a plurality of reinforcing plates (16) are arranged on the outer side of the first side mold (10) and the outer side of the second side mold (20).