CN211221247U - Heavy haul railway switch tie forming die - Google Patents

Abstract

The utility model relates to a heavy haul railway switch tie forming die, including parallel arrangement's both sides roof beam and establish two forming shell between the curb girder side by side, forming shell both ends are equipped with fixed end roof beam and stretch-draw end roof beam, it is equipped with stretch-draw mechanism to correspond two forming shell on the stretch-draw end roof beam, it is equipped with a plurality of opposite end baffles to slide along its length direction in the forming shell, the symmetry is equipped with two recesses on the face of end baffle both sides, recess bottom fixedly connected with compression spring, compression spring free end fixedly connected with slider, the position department that corresponds the slider on the two inside walls of forming shell all is equipped with the spout that distributes along forming shell length direction, slider sliding connection is on the spout, forming shell bottom distributes along its length direction has a plurality of locating holes, it is equipped with pre-. The utility model discloses can satisfy the production demand of the switch pillow of different length, it is nimble convenient to use, and the location of end shield and pre-buried iron seat is more firm, can improve the shaping quality of switch pillow greatly, reduction in production cost.

Description

Heavy haul railway switch tie forming die

Technical Field

The utility model belongs to the technical field of railway switch tie production, concretely relates to heavy haul railway switch tie forming die.

Background

The switch sleeper is a special sleeper used on a railway switch, is mainly used at the traction point of the switch, can arrange a switch electric switch rod piece in the sleeper, and is beneficial to maintenance operation of a large machine. The switch ties are mainly classified into wood switch ties, concrete switch ties, steel switch ties, and the like according to the difference of materials. The main turnout foundation in China has two forms of a wooden turnout sleeper and a concrete turnout sleeper, and the concrete turnout sleeper is heavier than the wooden turnout sleeper, long in service life, not easy to bend, capable of reducing the cracking loss of a manganese steel frog, capable of increasing the rigidity of a track and good in stability, so that the concrete turnout sleeper is generally adopted on a heavy haul railway. The production process of the concrete switch tie comprises the following steps: installing embedded parts, putting steel wires into a die, tensioning, installing accessories, installing stirrup spiral ribs, pouring vibration, maintaining, releasing tension and demolding and the like, wherein a plurality of processes are all completed in a forming die, and the used forming die is very important. However, only one forming die cavity of the existing forming die is generally used, and most of the forming die cavities are fixed and unchangeable, that is, one forming die can only produce the switch tie with one length specification, so that the utilization rate of the forming die is low, the use is not flexible and convenient enough, the forming efficiency of the switch tie is lower, the switch ties with different length specifications need the forming dies with different specifications, the demand of the forming die is large, the production cost is increased, and the production development of enterprises is not facilitated. Meanwhile, the positioning of the end part forming pore plate and the embedded iron seat of the existing forming die is not firm enough, the positioning precision is poor, and the deviation of the end part forming pore plate and the embedded iron seat is easy to occur in the processes of steel wire die-entering, tensioning and the like, so that the manufacturing precision of the formed switch tie is low, the qualification rate of the finished switch tie is reduced, and the improvement is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a heavy haul railway switch tie forming die can satisfy the production demand of the switch tie of different length, and it is nimble convenient to use, and the location of end shield and pre-buried iron seat is more firm, and positioning accuracy is higher, can improve the shaping efficiency and the shaping quality of switch tie greatly to solve above-mentioned technical problem.

In order to achieve the above object, the utility model adopts the following technical scheme: a heavy haul railway switch tie forming die comprises two side beams arranged in parallel and two forming shells arranged between the two side beams side by side, wherein the outer bottoms of the two forming shells are fixedly connected through a plurality of bottom cross beams, the two ends of each forming shell are respectively provided with a fixed end beam and a tension end beam, two groups of tension mechanisms are arranged on the tension end beams corresponding to the two forming shells, a plurality of opposite end baffles are arranged in each forming shell in a sliding mode along the length direction of the forming shell, forming die cavities are formed between the two end baffles of a single opposite end baffle, two grooves are symmetrically arranged on the two side faces of each end baffle, compression springs are fixedly connected to the bottom of each groove, sliding blocks are fixedly connected to the free ends of the compression springs, sliding grooves distributed along the length direction of each forming shell are arranged at positions corresponding to the sliding blocks on the two inner side walls of each forming shell, the sliding blocks are connected, the rest parts of the sliding grooves are blocked by sealing steel bars, a plurality of positioning holes are distributed at the bottom of the formed shell along the length direction, the positioning hole is sleeved with an embedded iron seat through a sealing ring, the end of the embedded iron seat where the clamping groove is located faces downwards and penetrates through the positioning hole to the lower part of the bottom of the forming shell, the inside of the clamping groove is clamped with a positioning core block, the outside of the end of the clamping groove is provided with a shaped positioning bracket, both ends of the positioning bracket are fixedly connected with the outer bottom of the molding shell, and both side plates of the positioning bracket are respectively arranged vertically with the two exposed side surfaces of the positioning core block, a stop plate is arranged between one end of the two side plates of the positioning bracket, the two ends of the stop plate are respectively and fixedly connected with the two side plates of the positioning bracket through fixing bolts, the middle part of the stop plate is fixedly connected with the corresponding side surface of the positioning core block through a side tensioning bolt, and the bottom plate of the positioning bracket is fixedly connected with the bottom of the positioning core block through a lower tensioning bolt.

Preferably, one side that carries on the back mutually between two shaping casings all links to each other with the curb girder welded fastening that corresponds, and relative one side links to each other through well muscle board welded fastening between two shaping casings, the bottom crossbeam on the shaping casing bottom is just along the length direction interval equipartition of shaping casing the bottom crossbeam's both ends all extend to the bottom of curb girder, the bottom crossbeam links to each other with the outer bottom of shaping casing and the bottom welded fastening of curb girder.

Preferably, a middle seal is fixedly arranged on the top of the middle rib plate along the length direction of the middle rib plate, and two sides of the middle seal extend to cover the top of the side face of the corresponding forming shell.

Preferably, the tensioning mechanism comprises a tensioning box positioned between the forming shell and the tensioning end beam and a tensioning lead screw arranged on the tensioning end beam in a penetrating mode, one end, close to the tensioning box, of the tensioning lead screw is fixedly connected with the tensioning box, and the other end of the tensioning lead screw extends out of the tensioning end beam and is fixedly connected with the tensioning end beam through a tensioning nut sleeved on the tensioning lead screw.

Preferably, the end baffle is matched with the forming shell, a plurality of prestressed steel wire holes and a plurality of threaded steel bar holes are formed in the surface of the end baffle, the prestressed steel wire holes are distributed in an isosceles trapezoid shape, and the threaded steel bar holes are distributed in an inverted isosceles trapezoid shape.

Preferably, the sliding block is matched with the groove, and the sliding block can be completely pressed into the groove.

Preferably, the sliding groove is matched with the sliding block, and the sealing steel bar is matched with the sliding groove.

Preferably, the locating holes are uniformly distributed at intervals along the length direction of the forming shell, a blocking ring is fixedly arranged at the outer bottom of the forming shell outside the locating holes and is located in the locating bracket, and the aperture of the blocking ring is larger than that of the sealing ring and smaller than that of the locating holes.

The utility model has the advantages that: the utility model relates to a rationally, simple structure: by arranging the two forming shells between the two side beams in parallel, the number of forming die cavities on the same forming die can be greatly increased, and the utilization rate of the forming die and the production efficiency of the switch tie are improved; the multiple pairs of end baffles are arranged in the forming shell in a sliding manner, and can be adjusted by matching with the production requirements of the switch ties with different length specifications, so that the end baffles of the same pair of end baffles can be combined to form forming die cavities with various length specifications, and therefore, the switch ties with different lengths can be produced at the same time, the use flexibility and convenience of the forming die are greatly improved, the investment cost of the forming die is reduced, the production efficiency of the switch ties is ensured, and the production development of enterprises is facilitated; through the matching of the sliding block, the compression spring, the groove and the sliding groove, the connection and the positioning of the end baffle and the forming shell are more convenient, when the end baffle is placed in the forming shell, the sliding block on the end baffle only needs to be pressed to be completely pressed into the corresponding groove, so that the end baffle can be smoothly placed in the forming shell, when the end baffle is placed in place, namely the sliding block corresponds to the corresponding sliding groove, the compression spring resets, so that the sliding block is ejected out of the groove, the sliding block is clamped into the sliding groove, the end baffle can be clamped in the forming shell, the sliding block can slide in the sliding groove, the position of the end baffle is adjusted, after the position of the end baffle is determined, the rest part of the sliding groove is blocked by using a sealing steel bar, the casting forming of the switch tie is not influenced, the sliding block can also be firmly limited and fixed, so that the end baffle is fixed, the position precision, the manufacturing precision of the formed switch tie is improved; the degree of freedom on the embedded iron seat horizontal direction can be restricted through being connected of backstop board and location pellet side, and the degree of freedom on the embedded iron seat vertical direction can be restricted through being connected of location bracket bottom plate and location pellet bottom plate to carry out the accurate positioning to embedded ann iron seat, guarantee the positioning accuracy of embedded iron seat, prevent the displacement of embedded iron seat, further strengthen the manufacturing accuracy of shaping switch pillow, guarantee the shaping quality of switch pillow.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic side view of the cross-sectional structure of the present invention;

FIG. 4 is a schematic structural view of the end baffle of the present invention;

FIG. 5 is a schematic side view of the end stop of the present invention;

fig. 6 is a schematic view of the positioning and installation structure of the pre-buried iron seat of the present invention;

fig. 7 is a schematic view of the side view structure of the positioning and installation of the pre-buried iron seat of the present invention.

Reference numbers in the figures: the structure comprises a side beam 1, a forming shell 2, a bottom beam 3, a fixed end beam 4, a tensioning end beam 5, a tensioning screw rod 6, a tensioning nut 7, a positioning hole 8, an end baffle 9, a tensioning box 10, a tensioning box 11, a sliding groove 12, a middle sealing strip 13, a middle rib plate 14, a groove 14, a compression spring 15, a sliding block 16, a prestressed wire hole 17, a threaded steel bar hole 18, an embedded iron seat 19, a sealing ring 20, a retaining ring 21, a positioning core block 22, a positioning bracket 23, a lower tensioning bolt 24, a side tensioning bolt 25, a fixing bolt 26 and a stop baffle 27.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 7, a heavy haul railway switch tie forming die comprises two side beams 1 arranged in parallel and two forming shells 2 arranged between the two side beams 1 side by side, outer bottoms of the two forming shells 2 are fixedly connected through a plurality of bottom cross beams 3, in practical use, one side of each of the two forming shells 2, which is opposite to each other, is fixedly connected with the corresponding side beam 1 in a welding manner, one side of each of the two forming shells 2, which is opposite to each other, is fixedly connected with each other in a welding manner through a middle rib plate 13, the bottom cross beams 3 on the outer bottom of the forming shell 2 are uniformly distributed at intervals along the length direction of the forming shell 2, two ends of each of the bottom cross beams 3 extend to the bottoms of the side beams 1, and the bottom cross beams 3 are also fixedly connected with the outer bottom of the forming shell 2 and the bottoms of the side beams 1 in a welding manner, so that the stability of the. By arranging the two forming shells 2 between the two side beams 1 side by side, the number of forming die cavities on the same forming die can be greatly increased, and the utilization rate of the forming die and the production efficiency of the switch tie are improved. Two ends of the forming shell 2 are respectively provided with a fixed end beam 4 and a stretching end beam 5, and two groups of stretching mechanisms are arranged on the stretching end beam 5 corresponding to the two forming shells 2 and are respectively used for fixing and stretching prestressed steel wires and twisted steel bars, and the pouring forming of the switch tie is realized in a matching manner.

A plurality of opposite end baffles 9 are arranged in the forming shell 2 in a sliding mode along the length direction of the forming shell, a forming die cavity is formed between the two end baffles 9 of a single opposite end baffle 9, two grooves 14 are symmetrically formed in two side faces of each end baffle 9, compression springs 15 are fixedly connected to the bottoms of the grooves 14, sliders 16 are fixedly connected to the free ends of the compression springs 15, the sliders 16 are matched with the grooves 14, and the sliders 16 can be completely pressed into the grooves 14 to guarantee smooth placement of the end baffles 9. The positions of the two inner side walls of the forming shell 2 corresponding to the sliding blocks 16 are respectively provided with a sliding groove 11 which is distributed along the length direction of the forming shell 2 and is matched with the sliding blocks 16, the sliding blocks 16 can be connected on the sliding grooves 11 in a sliding mode, and after the positions of the sliding blocks 16 are determined, the rest parts of the sliding grooves 11 are sealed through sealing steel bars (not shown in the figure). The multiple pairs of end baffles 9 are arranged in the forming shell 2 in a sliding manner, and can be adjusted by matching with the production requirements of the switch ties with different length specifications, so that the end baffles 9 at the same end of the end baffles 9 can be combined to form forming die cavities with various length specifications, thereby being capable of producing the switch ties with different lengths simultaneously, greatly improving the use flexibility and convenience of a forming die, reducing the investment cost of the forming die, ensuring the production efficiency of the switch ties and being beneficial to the production development of enterprises; the end baffle 9 and the forming shell 2 are more convenient to connect and position through the matching of the sliding block 16, the compression spring 15, the groove 14 and the sliding groove 11, when the end baffle 9 is placed on the forming shell 2, the end baffle 9 can be smoothly placed in the forming shell 2 only by pressing the sliding block 16 on the end baffle 9 to be completely pressed into the corresponding groove 14, when the end baffle 9 is placed in place, namely the sliding block 16 corresponds to the corresponding sliding groove 11, the compression spring 15 resets to eject the sliding block 16 from the groove 14, the sliding block 16 is clamped into the sliding groove 11, the end baffle 9 can be clamped in the forming shell 2, the sliding block 16 can slide in the sliding groove 11 to realize the adjustment of the position of the end baffle 9, after the position of the end baffle 9 is determined, the rest part of the sliding groove 11 is blocked by using the sealing steel bar, the sealing steel bar is matched with the sliding groove 11, so that the end face of the blocked sealing steel bar can be flush with, the casting molding of the switch tie is not influenced, and the sliding block 16 can be firmly limited and fixed, so that the end baffle 9 is fixed, the position precision of the end baffle 9 is ensured, the displacement of the end baffle 9 in the molding process is avoided, and the manufacturing precision of the molded switch tie is improved. When carrying out the drawing of patterns operation, can take off the sealed billet that lies in outside the shaping die cavity earlier, change shorter sealed billet, stir slider 16 and make its recess 14 back of impressing, promote again rapidly shorter sealed billet and remove to corresponding slider 16 on the part of the spout 11 that originally the card was gone into, can make slider 16 impress in corresponding recess 15 again completely, guarantee end baffle 9 and take out from shaping casing 2 along with shaping switch pillow smoothly in the drawing of patterns in-process, do not influence drawing of patterns operation.

A plurality of positioning holes 8 are distributed at the bottom of the forming shell 2 along the length direction, an embedded iron seat 19 is sleeved on the positioning holes 8 through a sealing ring 20 and is used for being integrally formed with the concrete switch tie, and in the actual use of the switch tie, the switch tie is fixed and is prevented from falling and shifting due to impact. The sealing ring 20 can prevent the leakage of slurry in the casting process and ensure the casting molding quality of the concrete switch tie. The pre-buried iron seat 19 can be an existing pre-buried iron seat with a clamping groove, and the specific structure belongs to the prior art and is not described herein again. When the positioning device is used, the end of the clamping groove of the embedded iron seat 19 faces downwards and penetrates out of the positioning hole 8 to the lower portion of the bottom of the forming shell 2, the positioning core block 22 is connected in the clamping groove of the embedded iron seat 19 in a clamping mode, the shape positioning bracket 23 is arranged outside the end of the clamping groove, two ends of the positioning bracket 23 are fixedly connected to the outer bottom of the forming shell 2, two side plates of the positioning bracket 23 are perpendicular to two exposed side faces of the positioning core block 22 respectively, so that the positioning core block 22 can be taken and placed conveniently, the stop plate 27 is arranged between one end of each of the two side plates of the positioning bracket 23, two ends of the stop plate 27 are fixedly connected with the two side plates of the positioning bracket 23 respectively through the fixing bolts 26, the middle of the stop plate 27 is fixedly connected with the corresponding side face of the positioning core block 22 through the side. The degree of freedom in the horizontal direction of the embedded iron seat 19 can be limited through the connection of the stop plates 27 and the side surfaces of the positioning core blocks 22, the degree of freedom in the vertical direction of the embedded iron seat 19 can be limited through the connection of the bottom plate of the positioning bracket 23 and the bottom plate of the positioning core blocks 22, so that the embedded iron seat 19 is accurately positioned, the positioning precision of the embedded iron seat 19 is ensured, the displacement of the embedded iron seat 19 is prevented, the manufacturing precision of the formed switch tie is further enhanced, and the forming quality of the switch tie is ensured.

In this embodiment, the middle sealing strip 12 is fixedly arranged on the top of the middle rib plate 13 along the length direction thereof, and the two sides of the middle sealing strip 12 extend to cover the top of the corresponding side surface of the molded shell 2, so that the sealing connection between the molded shells 2 can be further enhanced, and the stability of the whole structure and the reliability of the operation can be ensured.

In this embodiment, the tensioning mechanism includes a tensioning box 10 located between the forming shell 2 and the tensioning end beam 5 and a tensioning screw 6 passing through the tensioning end beam 5, one end of the tensioning screw 6 close to the tensioning box 10 is fixedly connected with the tensioning box 10, and the other end extends out of the tensioning end beam 5 and is fixedly connected with the tensioning end beam 5 through a tensioning nut 7 sleeved on the tensioning screw 6. In practical use, after the prestressed steel wires and the twisted steel bars enter the forming shell 2, one end of each prestressed steel wire and the corresponding twisted steel bar is fixed to the fixed end beam 4, and the other end of each prestressed steel wire and the corresponding twisted steel bar is fixed to the tensioning box 10, so that the prestressed steel wires and the twisted steel bars can be tensioned through the tensioning screw rods 6, the structural strength of the formed switch tie is enhanced, and the service life and the use safety of the switch tie are improved.

In this embodiment, the end baffle 9 is adapted to the formed casing 2, and has a plurality of prestressed wire holes 17 and a plurality of threaded steel bar holes 18 on its surface, wherein the prestressed wire holes 17 are distributed in an isosceles trapezoid shape, and the threaded steel bar holes 18 are distributed in an inverted isosceles trapezoid shape. The prestressed wire holes 17 are used for penetrating prestressed wires, the threaded reinforcing steel bar holes 18 are used for penetrating threaded reinforcing steel bars, and during actual use, a steel bar truss needs to be erected between the two end baffles 9 of the same pair of end baffles 9, the structure of the steel bar truss is the prior art, and is not described herein any more, and the two ends of the steel bar truss are also penetrated through the threaded reinforcing steel bar holes 18 of the corresponding end baffles 9.

In this embodiment, the positioning holes 8 are uniformly distributed at intervals along the length direction of the forming shell 2, the outer bottom of the forming shell 2 outside the positioning holes 8 is fixedly provided with a baffle ring 21, the baffle ring 21 is located in the positioning bracket 23, the aperture of the baffle ring 21 is larger than that of the sealing ring 20 and smaller than that of the positioning holes 8, so that the sealing ring 20 is limited and fixed, and the top of the sealing ring 20 can be flush with the inner bottom of the forming shell 2 when the sealing ring 20 is installed in place, thereby ensuring the manufacturing precision of the switch tie.

The utility model discloses a theory of operation: the utility model discloses when using, at first at 2 internal spraying release agents of shaping casing, later install pre-buried iron seat 19 on each locating hole 8 again, specifically be: firstly, the sealing ring 20 is sleeved on the embedded iron seat 19, then the embedded iron seat 19 with the sealing ring 20 is placed in the corresponding positioning hole 8, the end where the clamping groove of the embedded iron seat 19 is located penetrates out of the positioning hole 8 downwards, the bottom of the sealing ring 20 is limited by the retaining ring 21, the top of the sealing ring 20 is flush with the inner bottom of the forming shell 2, then the positioning core block 22 is clamped and embedded in the clamping groove of the embedded iron seat 19, the two ends of the stop plate 27 are fixed at the end part of the side plate of the corresponding positioning bracket 23 through the fixing bolt 26, then the stop plate 27 is fixedly connected with the side surface of the corresponding core block 22 through the side tensioning bolt 25 to limit the degree of freedom of the embedded iron seat 19 in the horizontal direction, then the bottom plate of the positioning bracket 23 is fixedly connected with the bottom of the positioning core block 22 through the lower tensioning bolt 24 to limit the degree of freedom of the embedded iron seat 19 in the vertical direction, and, the displacement of the embedded iron seat 19 in the forming process is avoided, the forming quality of the switch tie is ensured, and the installation of other embedded accessories is the same as that in the prior art. After the installation of the embedded accessories is finished, the assembly of the prestressed steel wires, the threaded steel bars and the end baffle 9 is carried out outside the forming die, and the method specifically comprises the following steps: each prestressed steel wire is arranged in a prestressed steel wire hole 17 of each end baffle 9, a threaded steel bar is arranged in a threaded steel bar hole 18 of each end baffle 9, and the approximate position of each pair of end baffles 9 is adjusted according to the specification length of each turnout sleeper to be produced. Then, the prestressed steel wire, the threaded steel bar and the end baffle 9 are placed into the corresponding forming shell 2 together, one end of the prestressed steel wire and the threaded steel bar is fixedly connected with the fixed end beam 4, and the other end of the prestressed steel wire and the threaded steel bar is fixedly connected with the tensioning box 10. In the process of putting in, the sliding block 16 on the end baffle 9 is pressed to be completely pressed into the corresponding groove 14, so that the end baffle 9 can be smoothly put into the forming shell 2, when the end baffle 9 is put in place, namely the sliding block 16 corresponds to the corresponding sliding groove 11, the compression spring 15 is reset, the sliding block 16 is ejected out, and the sliding block 16 is clamped into the sliding groove 11 and can slide in the sliding groove 11. Then, the steel bar trusses needed between each pair of end baffles 9 are manufactured, the steel bar trusses are placed between the two end baffles 9 of each corresponding pair of end baffles 9, the positions of the end baffles 9 are finely adjusted, the end portions of the steel bar trusses penetrate through the threaded steel bar holes 18 of the corresponding end baffles 9, and then the prestressed steel wires and the threaded steel bars are tensioned through a tensioning mechanism. And then finely adjusting the positions of the end baffles 9 to accurately position the end baffles, plugging the rest parts of the sliding chute 11 by using a sealing steel bar, limiting and fixing the positions of the end baffles 9 to ensure the positioning precision of the end baffles 9, wherein the end surfaces of the sealed steel bar are flush with the inner side wall of the forming shell 2 so as not to influence the forming quality of the switch tie. And then, casting and curing the concrete. After the curing is finished, stress relaxation is firstly carried out, and then demoulding operation is carried out. When demoulding, the exposed sealing steel bar can be taken down firstly, the shorter sealing steel bar is replaced, the slider 16 is pushed to be pressed into the groove 14 temporarily, and then the shorter sealing steel bar is pushed to block the part of the sliding groove 11 clamped by the original slider 16, so that the slider 16 can be pressed into the corresponding groove 14 again, the end baffle 9 can be taken out of the forming shell 2 along with the forming switch tie smoothly in the mould stripping process, and the demoulding operation is not influenced. In the demoulding process, the demoulding operation of the part of the embedded iron seat 19 only needs to take off the side tensioning bolt 25 and the lower tensioning bolt 34 firstly and then draw out the positioning core block 22, so that the embedded iron seat 19 can be smoothly demoulded together with the formed switch tie. And after demolding is finished, the end baffle 9 is tapped, and the end baffle 9 is detached from the formed switch tie.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. A heavy haul railway switch tie forming die is characterized by comprising two side beams arranged in parallel and two forming shells arranged between the two side beams side by side, wherein the outer bottoms of the two forming shells are fixedly connected through a plurality of bottom cross beams, the two ends of each forming shell are respectively provided with a fixed end beam and a tensioning end beam, two groups of tensioning mechanisms are arranged on the tensioning end beams corresponding to the two forming shells, a plurality of opposite end baffles are arranged in each forming shell in a sliding mode along the length direction of the forming shell, a forming die cavity is formed between the two end baffles of a single opposite end baffle, two grooves are symmetrically arranged on the two side faces of each end baffle, compression springs are fixedly connected to the bottoms of the grooves, sliders are fixedly connected to the free ends of the compression springs, sliding grooves distributed along the length direction of the forming shells are formed in the positions of the two inner side walls of each forming shell corresponding to the sliders, after the position of the sliding block is determined, the rest parts of the sliding groove are blocked by sealing steel bars, a plurality of positioning holes are distributed at the bottom of the forming shell along the length direction, the positioning hole is sleeved with an embedded iron seat through a sealing ring, the end of the embedded iron seat where the clamping groove is located faces downwards and penetrates through the positioning hole to the lower part of the bottom of the forming shell, the inside of the clamping groove is clamped with a positioning core block, the outside of the end of the clamping groove is provided with a shaped positioning bracket, both ends of the positioning bracket are fixedly connected with the outer bottom of the molding shell, and both side plates of the positioning bracket are respectively arranged vertically with the two exposed side surfaces of the positioning core block, a stop plate is arranged between one end of the two side plates of the positioning bracket, the two ends of the stop plate are respectively and fixedly connected with the two side plates of the positioning bracket through fixing bolts, the middle part of the stop plate is fixedly connected with the corresponding side surface of the positioning core block through a side tensioning bolt, and the bottom plate of the positioning bracket is fixedly connected with the bottom of the positioning core block through a lower tensioning bolt.

2. The mold for forming heavy haul railway switch tie as claimed in claim 1, wherein the opposite sides of the two forming shells are fixedly welded to the corresponding side beams, the opposite sides of the two forming shells are fixedly welded to the middle rib plates, bottom cross beams on the outer bottoms of the forming shells are uniformly distributed at intervals along the length direction of the forming shells, two ends of each bottom cross beam extend to the bottoms of the side beams, and the bottom cross beams are fixedly welded to the outer bottoms of the forming shells and the bottoms of the side beams.

3. The mold for forming heavy haul railway switch tie according to claim 2, wherein a middle seal strip is fixedly arranged on the top of the middle rib plate along the length direction of the middle rib plate, and two sides of the middle seal strip extend to cover the top of the side face of the corresponding forming shell.

4. The mold for forming heavy haul railway switch tie according to claim 1, wherein the tensioning mechanism comprises a tensioning box located between the forming shell and the tensioning end beam and a tensioning screw rod penetrating through the tensioning end beam, one end of the tensioning screw rod close to the tensioning box is fixedly connected with the tensioning box, and the other end of the tensioning screw rod extends out of the tensioning end beam and is fixedly connected with the tensioning end beam through a tensioning nut sleeved on the tensioning screw rod.

5. The mold for forming heavy haul railway switch tie as claimed in claim 1, wherein the end shield is adapted to the forming shell and has a plurality of prestressed steel wire holes and a plurality of threaded steel bar holes on its surface, the prestressed steel wire holes are distributed in an isosceles trapezoid shape, and the threaded steel bar holes are distributed in an inverted isosceles trapezoid shape.

6. The mold for molding heavy haul railway switch ties as claimed in claim 1, wherein the sliding block is adapted to the groove and can be completely pressed into the groove.

7. The mold for molding heavy haul railway switch tie according to claim 1, wherein the sliding groove is adapted to the sliding block, and the sealing steel bar is adapted to the sliding groove.

8. The mold for forming heavy haul railway switch tie as claimed in claim 1, wherein the positioning holes are uniformly distributed along the length direction of the forming housing at intervals, the outer bottom of the forming housing outside the positioning holes is fixedly provided with a retaining ring, the retaining ring is located in the positioning bracket, and the diameter of the retaining ring is larger than that of the sealing ring and smaller than that of the positioning holes.

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