Polyurethane roller pouring mold

Abstract

The utility model provides a polyurethane roller pouring mould which comprises a base and a cavity, the base is fixedly connected with the cavity through a bolt, a roller core is installed inside the cavity, a pouring groove is formed between the roller core and the cavity, a mould cover is installed on the top of the roller core, and a mould cover is installed on the mould cover. The top of the base is fixedly connected with a limiting lifting assembly through bolts and rotationally connected with a telescopic dust suction device. According to the utility model, the limiting lifting device is additionally arranged, and the cross rod in the limiting lifting device rotates and drives through the telescopic dust collection device, so that the cross connecting block slides in the sliding groove, the upper pushing block ascends to push and lift the roller core, the polyurethane roller body is pushed out of the cavity and taken out more conveniently, and the device is safe, efficient and more environment-friendly; and the telescopic dust suction device sucks dust residues on the top of the bottom plate into the corresponding dust collection box under the action of the fan, so that the top of the bottom plate is cleaned more conveniently, and the pouring process is more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of casting moulds, in particular to a polyurethane roller casting mould. Background Art

[0002] In the related art, a utility model patent with patent publication number CN211891650U is retrieved and proposes a polyurethane roller casting mold, including a base plate, a cavity, a core rod, a top block and a mold cover; the cavity and the core rod arranged in the cavity are coaxially fixed on the upper surface of the base plate, and positioning steps and mold covers are respectively provided at both ends of the main rod of the core rod, and a top block is provided on the main rod and between the positioning steps and the mold cover, and a wheel core positioned by the positioning steps and the mold cover is provided on the outer sleeve of the top block, thereby ensuring the coaxiality accuracy of the wheel core and the cavity; in addition, a first air passage, a second air passage and an exhaust hole are also provided on the main rod and the positioning step, and ventilation is used to push the top block and the formed polyurethane roller out of the cavity.

[0003] According to the above-mentioned prior art, the inventor combined relevant technologies and found in actual application that the utility model only solves the problem of demolding in the production process. In the actual production process, it was found that when the polyurethane raw material was poured into the mold from top to bottom, the exhaust hole was easily blocked by the polyurethane raw material. At this time, the air inside the wheel core expanded due to heat, pushing the mold cover upward, causing the polyurethane raw material to flow into the wheel core, resulting in the upper end of the product being scrapped due to lack of material, and the product cannot be demolded by blowing. The demolding still relies on the traditional blowing method for demolding. The residual dust blown out makes the working environment too dusty. At the same time, when the air pump pressure is too high, it is easy to cause the mold cover to spray out, posing a hidden danger to the personal safety of the staff. Utility Model Content

[0004] In order to solve the problems of a polyurethane roller casting mold in the prior art, the utility model provides a polyurethane roller casting mold;

[0005] The utility model provides a polyurethane roller casting mold adopts the following technical solution:

[0006] A polyurethane roller casting mold comprises a base and a cavity, wherein the base is fixedly connected to the cavity by bolts, a wheel core is installed inside the cavity, a casting groove is formed between the wheel core and the cavity, a mold cover is installed on the top of the wheel core, a limited lifting assembly is fixedly connected to the top of the base by bolts, and a telescopic dust suction device is rotatably connected to the top of the base.

[0007] Furthermore, the limit lifting assembly includes a limit body, a connecting protrusion, and a lifting unit. The limit body is fixedly installed on the top of the base by bolts, and the two opposite side walls at the bottom of the limit body are integrally formed with connecting protrusions. The base is fixedly connected to the two connecting protrusions by bolts, and the two opposite side walls at the bottom of the limit body are integrally formed with lifting units.

[0008] Further, the lifting unit includes a lifting bin, a lifting hole, a rolling block, a pushing rod slide groove, a first cross rod, a pushing rod, a cross rod slide groove, a cross connecting block, an upper push block, and a second cross rod. The bottom side wall of the limiting body is integrally formed with a lifting bin, the top of the lifting bin is provided with a lifting hole, the two side walls opposite to the lifting hole are provided with a cross rod slide groove, the cross connecting block is slidably connected in the cross rod slide groove, the side wall of the cross connecting block is rotatably connected with the first cross rod and the second cross rod, the center of the first cross rod is rotatably connected with the center of the second cross rod through the cross connecting block, the bottom ends of the first cross rod and the second cross rod are rotatably connected with the rolling block, the top ends of the first cross rod and the second cross rod are rotatably connected with the upper push block, the side wall of the rolling block at one end of the first cross rod is fixedly connected with the pushing rod, the side wall of the lifting hole is provided with a pushing rod groove, and the pushing rod is slidably connected to the inner side wall of the pushing rod groove.

[0009] Further, the telescopic dust suction device includes a knob body, a first air hole, a rotary rod, a first gear, a second gear, a connecting rod, a rotary knob protrusion, a first dust suction unit, a second dust suction unit, and a locking unit. The top of the base is fixedly connected to a bearing, the inner side wall of the bearing is fixedly connected to a rotary knob protrusion, the top of the rotary knob protrusion is integrally formed with a knob body, the top of the knob body is provided with a first air hole, the top of the knob body is provided with a through hole, the rotary rod is rotatably connected in the through hole, one end of the rotary rod close to the inside of the knob body is fixedly connected to the first gear, the inner wall of the knob body is rotatably connected to the connecting rod, the end of the connecting rod close to the rotary rod is provided with a second gear, the first gear is meshed with the second gear, the two opposite side walls of the knob body are slidably connected with the first dust suction unit and the second dust suction unit through the through hole, and a locking unit is provided inside the knob body.

[0010] Further, the first dust suction unit and the second dust suction unit include a first dust screen, a first sealing block, a first dust collecting box, a second air hole, a first air duct, a bearing, a third air hole, a second air duct, a second dust screen, a second sealing block, a first gear rod, and a second gear rod, and two opposite side walls of the knob body are respectively provided with through holes, and the two through holes are respectively slidably connected to the first gear rod and the second gear rod, and the second gear is meshedly connected to the first gear rod and the second gear rod, and the side wall of the first gear rod is provided with a second air hole, and the first gear rod is provided with a first air duct inside, and the side wall of the air duct inside the first gear rod is provided with a first dust collecting box, and the inner side wall of the first dust collecting box is installed with a first dust screen, and first sealing blocks are provided on both sides of the first dust collecting box, and the side wall of the second gear rod is provided with a third air hole, and the second gear rod is provided with a second air duct inside, and the side wall of the air duct inside the second gear rod is provided with a second dust collecting box, and a second dust screen is installed on the inner side wall of the second dust collecting box, and second sealing blocks are provided on both sides of the second dust collecting box.

[0011] Furthermore, the locking unit includes a locking rod, a spring, a blocking block, a locking bin, a locking wheel, and a third sealing strip. A locking bin is integrally formed inside the knob body, a through hole is provided on the side wall of the knob body, a locking rod is slidably connected in the through hole, a blocking block is fixedly installed on the inner side wall of the locking bin, one end of the spring is fixedly connected to the inner side wall of the locking bin, and the other end of the spring is fixedly connected to the blocking block. The locking wheel is integrally formed on the side wall of the rotating rod close to the transmission bin, and a through hole is provided on the locking bin, and the locking rod passes through the through hole and engages with the locking wheel.

[0012] Furthermore, the number of the springs is N, where N≥2.

[0013] In summary, the beneficial effects of the utility model are:

[0014] The utility model adds a limited lifting device, and the cross rod inside the cross rod is driven by the first gear rod and the second gear rod, so that the cross connection block slides in the sliding groove, and the upper push block is lifted up to push the wheel core, so that the polyurethane roller body is pushed out of the cavity, which is more convenient to take out, safe, efficient and environmentally friendly. The polyurethane roller body is lifted and ejected by the kinetic energy of rotation, and a telescopic dust suction device is added, so that the first air hole on the top of the knob body can be connected to the fan, and the rotary rod is adjusted so that the first gear rod and the second gear rod are in contact with the inner wall of the cavity, so that the first gear rod and the second gear rod can suck the dust residue on the top of the bottom plate into the corresponding dust collecting box under the action of the fan, so that the cleaning of the top of the bottom plate is more convenient, and there is no need to disassemble and wipe the mold for cleaning due to the residual dust on the bottom, so that the casting process is more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded schematic diagram of the overall structural components of the utility model;

[0017] Figure 3 It is a schematic diagram of a front cross-sectional view of the utility model;

[0018] Figure 4 It is a three-dimensional schematic diagram of the lifting unit of the utility model;

[0019] Figure 5 This is a schematic diagram of the interior of the telescopic dust collecting device of the utility model;

[0020] Figure 6 This is a schematic diagram of the telescopic dust suction device and the limit lifting component of the utility model

[0021] Figure 7 This is a schematic cross-sectional view of the locking unit of the utility model

[0022] Figure 8 For this utility model Figure 3 Enlarged schematic diagram of part A in the middle.

[0023] As shown in the figure: 1-bottom plate, 2-cavity, 3-first air hole, 4-knob body, 5-polyurethane roller body, 6-wheel core, 7-limiting body, 8-mold cover, 9-rotating rod, 10-casting groove, 11-first gear, 12-second gear, 13-connecting rod, 14-first gear rod, 15-second gear rod, 16-first dust screen, 17-first sealing block, 18-first dust box, 19-second air hole, 20-first air channel, 21-bearing, 22-connecting protrusion, 23-locking Rod, 24-spring, 25-blocking block, 26-locking bin, 27-second dust box, 28-third air hole, 29-second air duct, 30-second dust blocking net, 31-second sealing block, 32-rolling block, 33-sliding groove, 34-first cross rod, 35-push rod, 36-push rod sliding groove, 37-cross connecting block, 38-upper push block, 39-second cross rod, 40-lifting hole, 41-lifting bin, 42-rotating knob protrusion, 43-locking wheel, 44-third sealing block. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-8 The utility model is further described in detail:

[0025] The utility model embodiment discloses a polyurethane roller casting mold, such as Figure 1 , Figure 2As shown, a polyurethane roller casting mold includes a base plate 1 and a cavity 2, the base plate 1 and the cavity 2 are fixedly connected by bolts, a wheel core 6 is installed inside the cavity 2, a casting groove 10 is formed between the wheel core 6 and the cavity 2, a mold cover 8 is installed on the top of the wheel core 6, a limited lifting component is fixedly connected to the top of the base plate 1 by bolts, and a telescopic dust suction device is rotatably connected to the top of the base plate 1. In this embodiment, by adding a lifting component, the lifting component pushes the wheel core 6 upward, so that the polyurethane roller body 5 is convenient to remove, and the telescopic dust suction device is added, so that the cleaning of the top of the base plate 1 is more convenient, and there is no need to disassemble and wipe the mold due to residual dust on the bottom, so that the casting process is more efficient.

[0026] like Figure 1 , Figure 2 , Figure 4 As shown, the limiting lifting assembly includes a limiting body 7, a connecting protrusion 22, and a lifting unit. The limiting body 7 is fixedly installed on the top of the base plate 1 by bolts, and the two opposite side walls at the bottom of the limiting body 7 are integrally formed with connecting protrusions 22. The base plate 1 and the two connecting protrusions 22 are fixedly connected by bolts, and the two opposite side walls at the bottom of the limiting body 7 are integrally formed with a lifting unit. In this embodiment, by adding the connecting protrusion 22, the base plate 1 and the limiting body 7 are fixed by bolts, so that the connection between the limiting body 7 and the base plate 1 is more stable, and the positioning of the wheel core 6 is more accurate and stable.

[0027] like Figure 2 , Figure 4 , Figure 6As shown, the lifting unit includes a lifting bin 41, a lifting hole 40, a rolling block 32, a push rod slide 36, a first cross rod 34, a push rod 35, a cross rod slide 33, a cross connecting rod 37, an upper push block 38, and a second cross rod 39. The bottom side wall of the limiting body 7 is integrally formed with a lifting bin 41, a lifting hole 40 is opened on the top of the lifting bin 41, and the two side walls opposite to the lifting hole 40 are both provided with a cross rod slide 33, and the cross connecting rod 37 is slidably connected in the cross rod slide 33. The side wall of the cross connecting rod 37 is rotatably connected to the first cross rod 34 and the second cross rod 39. The center of the first cross rod 34 and the center of the second cross rod 39 are rotatably connected through the cross connecting rod 37. The bottom ends of the first cross rod 34 and the second cross rod 39 are rotatably connected. A rolling block 32 is connected, and the top ends of the first cross rod 34 and the second cross rod 39 are rotatably connected to the upper push block 38. The side wall of the rolling block 32 at one end of the first cross rod 34 is fixedly connected to the push rod 35. The side wall of the lifting hole 40 is provided with a push rod slide groove 36. The push rod 35 is slidably connected to the inner wall of the push rod slide groove 36. In this embodiment, by adding the push rod 35, the push rod 35 is pushed by the first gear rod 14 and the second gear rod 15 to drive the cross-connecting rod 37 to slide upward in the cross rod slide groove 33, so that the upper push block 38 rises and pushes the wheel core 6, and pushes the polyurethane roller body 5 out of the cavity 2, which is more convenient to remove, safer, more efficient, and more environmentally friendly. The polyurethane roller body 5 is lifted and ejected by the kinetic energy of rotation.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 8 As shown, the telescopic dust suction device includes a knob body 4, a first air hole 3, a rotary rod 9, a first gear 11, a second gear 12, a connecting rod 13, a rotary knob protrusion 42, a first dust suction unit, a second dust suction unit, and a locking unit. The top of the bottom plate 1 is fixedly connected to a bearing 21, the inner side wall of the bearing 21 is fixedly connected to a rotary knob protrusion 42, the top of the rotary knob protrusion 42 is integrally formed with a knob body 4, the top of the knob body 4 is provided with a first air hole 3, the top of the knob body 4 is provided with a through hole, the rotary rod 9 is rotatably connected in the through hole, the end of the rotary rod 9 close to the inside of the knob body 4 is fixedly connected to the first gear 11, and the inner side wall of the knob body 4 is rotatably connected to the connecting rod 13. A second gear 12 is provided at one end of the connecting rod 13 close to the rotating rod 9, the first gear 11 is meshed with the second gear 12, and the two opposite side walls of the knob body 4 are slidably connected with the first dust suction unit and the second dust suction unit through a through hole. A locking unit is provided inside the knob body 4. In this embodiment, by adding the knob body 4, the rotating knob protrusion 42 is fixedly connected to the inner wall of the bearing 21, the bottom plate 1 is provided with a groove, and the outer wall of the bearing 21 is fixedly connected to the groove. By adding the first air hole 3, a fan can be added to the top of the knob body 4 to suck the dust residue on the top of the bottom plate 1 into the first dust suction unit and the second dust suction unit.

[0029] like Figure 2 , Figure 3 , Figure 5 , Figure 8 As shown, the first dust suction unit and the second dust suction unit include a first dust screen 16, a first sealing block 17, a first dust collecting box 18, a second air hole 19, a first air duct 20, a bearing 21, a third air hole 28, a second air duct 29, a second dust screen 30, a second sealing block 31, a first gear rod 14, and a second gear rod 15. The two opposite side walls of the knob body 4 are respectively provided with through holes, and the two through holes are respectively slidably connected with the first gear rod 14 and the second gear rod 15. The second gear 12 is meshedly connected with the first gear rod 14 and the second gear rod 15. The side wall of the first gear rod 14 is provided with a second air hole 19, and the first air duct 20 is provided inside the first gear rod 14. The first gear rod 14 A first dust box 18 is provided on the side wall of the internal air duct, a first dust shield net 16 is installed on the internal side wall of the first dust box 18, first sealing blocks 17 are provided on both sides of the first dust box 18, a third air hole 28 is opened on the side wall of the second gear rod 15, a second air duct 29 is opened inside the second gear rod 15, a second dust box 27 is provided on the side wall of the internal air duct of the second gear rod 15, a second dust shield net 30 is installed on the internal side wall of the second dust box 27, and second sealing blocks 31 are provided on both sides of the second dust box 27. In this embodiment, by adding a dust box, the first gear rod 14 and the second gear rod 15 are acted upon by the fan, and dust residues on the top of the bottom plate 1 are sucked into the corresponding dust boxes. The first gear rod 14 and the second gear rod 15 are respectively provided with through holes for absorbing the residual dust at the bottom, near the end away from the knob body 4. The through holes cooperate with the first air duct 20, the second air duct 29, the third air hole 28, the second air hole 19 and the first air hole 3 to form a dust suction channel. The advantage of this is that it is more convenient to clean the top of the base plate 1. There is no need to disassemble and wipe the mold for cleaning due to the residual dust on the bottom, which greatly improves the efficiency.

[0030] like Figure 2 , Figure 5 , Figure 7As shown, the locking unit includes a locking rod 23, a spring 24, a blocking block 25, a locking chamber 26, a locking wheel 43, and a third sealing block 44. A locking chamber 26 is integrally formed inside the knob body 4, and a through hole is provided on the side wall of the knob body 4, in which a locking rod 23 is slidably connected. The locking rod 23 is fixedly installed with a blocking block 25 on the inner side wall of the locking chamber 26, and one end of the spring 24 is fixedly connected to the inner side wall of the locking chamber 26, and the other end of the spring 24 is fixedly connected to the blocking block 25. The side wall of the rotating rod 9 close to the transmission chamber is integrally formed with a locking wheel 43, and the locking chamber 26 is provided with a through hole, and the locking rod 23 passes through the through hole and engages with the locking wheel 43. In this embodiment, by adding the blocking block 25, the blocking block 25 and the locking chamber 26 are pressed against each other under the action of the spring 24, so that the locking rod 23 and the locking wheel 43 engage with each other, thereby completing the locking, and the engagement is made firm under the action of the spring 24.

[0031] like Figure 7 As shown, the number of springs 24 is N, where N≥2. In this embodiment, by increasing the number of springs 24, the locking rod 23 is more tightly engaged, which is more conducive to stable locking.

[0032] The implementation principle of the embodiment of the utility model is as follows: when in use, first pull up the locking rod 23 under the action of the spring 24, so that the locking rod 23 is separated from the locking wheel 43, and the rotary rod 9 is rotated, thereby driving the first gear 11 to transmit the second gear 12 and driving the first gear rod 14 and the second gear rod 15, so that the first gear rod 14 and the second gear rod 15 are adjusted to be close to the inner wall of the wheel core 6, and the locking rod 23 is released. Under the action of the spring 24, the locking rod 23 and the locking wheel 43 are engaged with each other to complete the locking, and the knob body 4 is rotated to drive the first gear rod 14 and the second gear rod wheel, and the first gear rod 14 and the second gear rod 15 drive the push rod 35. Driven by the push rod 35, the first cross rod 34 and the second cross rod 39 slide upward and push, and the cross connecting rod 37 slides upward in the cross rod groove 33, so that the upper push block 38 rises and pushes the wheel core 6, and the polyurethane roller body 5 is pushed out of the cavity 2, thereby completing the demoulding;

[0033] When it is necessary to clean the top of the base plate 1, remove the limit body 7, pull up the locking rod 23 to separate the locking rod 23 from the locking wheel 43, rotate the rotary rod 9, thereby driving the first gear 11 to transmit the second gear 12 and drive the first gear rod 14 and the second gear rod 15, so that the first gear rod 14 and the second gear rod 15 are adjusted to be close to the inner wall of the cavity 2, and add a fan to connect it to the first air hole 3 on the top of the knob body 4, so that the residue and dust on the top of the base plate 1 are rotated to be sucked into the dust collecting box and blocked by the dust shield to complete the collection and cleaning.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A polyurethane roller casting mold, comprising a base plate (1) and a cavity (2), wherein the base plate (1) and the cavity (2) are fixedly connected by bolts, characterized in that: A wheel core (6) is installed inside the mold cavity (2), a casting groove (10) is formed between the wheel core (6) and the mold cavity (2), a mold cover (8) is installed on the top of the wheel core (6), a limited lifting assembly is fixedly connected to the top of the base plate (1) by bolts, and a telescopic dust suction device is rotatably connected to the top of the base plate (1); The position-limiting lifting assembly comprises a position-limiting body (7), a connecting protrusion (22), and a lifting unit; the position-limiting body (7) is fixedly mounted on the top of the bottom plate (1) by means of bolts; two opposite side walls at the bottom of the position-limiting body (7) are integrally formed with connecting protrusions (22); the bottom plate (1) is fixedly connected to the two connecting protrusions (22) by means of bolts; and two opposite side walls at the bottom of the position-limiting body (7) are integrally formed with lifting units; The lifting unit comprises a lifting bin (41), a lifting hole (40), a rolling block (32), a push rod slot (36), a first cross rod (34), a push rod (35), a cross rod slot (33), a cross connecting rod (37), an upper push block (38), and a second cross rod (39). The bottom side wall of the limiting body (7) is integrally formed with a lifting bin (41). The top of the lifting bin (41) is provided with a lifting hole (40). The two side walls opposite to the lifting hole (40) are both provided with a cross rod slot (33). The cross rod slot (33) is slidably connected with a cross connecting rod (37). The side wall of the cross connecting rod (37) is rotatably connected with a A first cross rod (34) and a second cross rod (39), wherein the center of the first cross rod (34) and the center of the second cross rod (39) are rotatably connected via a cross connecting rod (37), the bottom ends of the first cross rod (34) and the second cross rod (39) are rotatably connected with a rolling block (32), the top ends of the first cross rod (34) and the second cross rod (39) are rotatably connected with an upper push block (38), the side wall of the rolling block (32) at one end of the first cross rod (34) is fixedly connected with a push rod (35), the side wall of the lifting hole (40) is provided with a push rod sliding groove (36), and the push rod (35) is slidably connected with the inner side wall of the push rod sliding groove (36); The telescopic dust suction device comprises a knob body (4), a first air hole (3), a rotary rod (9), a first gear (11), a second gear (12), a connecting rod (13), a rotary knob protrusion (42), a first dust suction unit, a second dust suction unit, and a locking unit; the top of the bottom plate (1) is fixedly connected to a bearing (21); the inner side wall of the bearing (21) is fixedly connected to a rotary knob protrusion (42); the top of the rotary knob protrusion (42) is integrally formed with a knob body (4); the top of the knob body (4) is provided with a first air hole (3); the top of the knob body (4) is provided with a A through hole is provided, in which a rotary rod (9) is rotatably connected, one end of the rotary rod (9) close to the inside of the knob body (4) is fixedly connected to a first gear (11), an inner wall of the knob body (4) is rotatably connected to a connecting rod (13), an end of the connecting rod (13) close to the rotary rod (9) is provided with a second gear (12), the first gear (11) is meshingly connected with the second gear (12), two opposite side walls of the knob body (4) are slidably connected to a first dust suction unit and a second dust suction unit through the through hole, and a locking unit is provided inside the knob body (4).

2. A polyurethane roller casting mold according to claim 1, characterized in that: The first dust suction unit and the second dust suction unit comprise a first dust screen (16), a first sealing block (17), a first dust collecting box (18), a second air hole (19), a first air duct (20), a bearing (21), a third air hole (28), a second air duct (29), a second dust screen (30), a second sealing block (31), a first gear rod (14), and a second gear rod (15); two opposite side walls of the knob body (4) are respectively provided with through holes, and the two through holes are respectively slidably connected to the first gear rod (14) and the second gear rod (15); the second gear (12) is meshedly connected with the first gear rod (14) and the second gear rod (15); the side wall of the first gear rod (14) is provided with a second air hole (19); The first gear rod (14) is provided with a first air duct (20) inside, a first dust collecting box (18) is arranged on the side wall of the air duct inside the first gear rod (14), a first dust shielding net (16) is installed on the side wall inside the first dust collecting box (18), first sealing blocks (17) are arranged on both sides of the first dust collecting box (18), a third air hole (28) is provided on the side wall of the second gear rod (15), a second air duct (29) is provided inside the second gear rod (15), a second dust collecting box (27) is arranged on the side wall of the air duct inside the second gear rod (15), a second dust shielding net (30) is installed on the side wall inside the second dust collecting box (27), and second sealing blocks (31) are arranged on both sides of the second dust collecting box (27).

3. A polyurethane roller casting mold according to claim 1, characterized in that: The locking unit comprises a locking rod (23), a spring (24), a blocking block (25), a locking chamber (26), a locking wheel (43), and a third sealing block (44); a locking chamber (26) is integrally formed inside the knob body (4); a through hole is provided on the side wall of the knob body (4), and a locking rod (23) is slidably connected in the through hole; a blocking block (25) is fixedly installed on the locking rod (23) on the inner side wall of the locking chamber (26); one end of the spring (24) is fixedly connected to the inner side wall of the locking chamber (26); the other end of the spring (24) is fixedly connected to the blocking block (25); a locking wheel (43) is integrally formed on the side wall of the rotating rod (9) close to the transmission chamber; a through hole is provided on the locking chamber (26), and the locking rod (23) passes through the through hole and engages with the locking wheel (43) mutually.

4. A polyurethane roller casting mold according to claim 3, characterized in that: The number of the springs (24) is N, where N≥2.

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