A polyurethane roller casting mold with a large aspect ratio

Abstract

The present invention discloses a large aspect ratio polyurethane roller casting mold, comprising: a locking shaft, a first bearing, a second bearing, a demolding frame, a positioning seat, a plurality of connecting rods, a plurality of first pins, a plurality of claws, a mold cavity, a mold cover, and a handle. The locking shaft comprises: a shaft body and a locking disk; the positioning seat comprises: a positioning sleeve and a positioning disk; each connecting rod passes through a transverse groove; a plurality of first pins are disposed within the positioning sleeve; each claw is connected to the other end of a connecting rod; the mold cavity is mounted on the positioning disk; the positioning sleeve, the demolding frame, and the locking shaft are all disposed within the mold cavity; the mold cover is disposed at the upper end of the mold cavity; the mold cover comprises: a cap-shaped portion and a rod-shaped portion; and the handle is sleeved on the rod-shaped portion. The polyurethane roller casting mold of the present invention is manufactured by placing a metal wheel core into the casting mold and casting polyurethane raw material onto the outer circumferential surface of the wheel core. This solves the problem of a certain coaxiality error between the outer circumferential surface of the polyurethane layer of the manufactured polyurethane roller and the hole of the wheel core.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane roller casting moulds with a large aspect ratio, in particular to a polyurethane roller casting mould with a large aspect ratio. Background Art

[0002] Polyurethane rollers are manufactured by placing a metal wheel core into a casting mold and pouring polyurethane onto the outer surface of the core. Due to factors such as mold design, manufacturing process operational factors, and the precision of the wheel core machining, the outer surface of the polyurethane layer of the finished polyurethane roller will have a certain degree of coaxiality error with the wheel core hole. Polyurethane rollers with large aspect ratios are particularly prone to excessive coaxiality error. During operation, coaxiality error in polyurethane rollers can affect the normal operation of the equipment and cause vibration, which is particularly severe in high-speed applications. Therefore, strict control of coaxiality error is necessary. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a polyurethane roller casting mold with a large aspect ratio.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A polyurethane roller casting mold with a large aspect ratio, comprising:

[0006] A locking shaft, comprising: a shaft body and a locking disk, wherein the locking disk is disposed in the middle of the locking shaft, the locking shaft and the locking disk are fixedly connected, the locking shaft passes through the center of the locking disk, and a plurality of sliding grooves are formed on the upper surface of the locking disk;

[0007] a first bearing and a second bearing, wherein the first bearing and the second bearing are both sleeved on the locking shaft, and the first bearing is arranged above the second bearing;

[0008] a demoulding frame, one end of which is sleeved on the top end of the locking shaft, and a bracket portion of the demoulding frame is arranged around the locking shaft;

[0009] The positioning seat comprises: a positioning sleeve and a positioning plate, the positioning sleeve is connected to the positioning plate, the positioning sleeve is arranged at the upper end of the positioning plate, the bottom end of the locking shaft is installed in the positioning sleeve, the bracket portion of the demoulding frame is arranged around the periphery of the positioning seat, the bottom end of the bracket of the demoulding frame is against the upper surface of the positioning plate, the second bearing is arranged in the positioning seat, the positioning plate is provided with a plurality of transverse grooves, the positioning plate is provided with a plurality of positioning slots, and each bracket of the demoulding frame is matched with one of the positioning slots;

[0010] a plurality of connecting rods, each of which passes through one of the transverse slots, one end of each connecting rod being disposed in the positioning sleeve, and the other end of each connecting rod being disposed outside the positioning sleeve;

[0011] a plurality of first pins, each of which is disposed in the positioning sleeve, each of which passes through one end of the connecting rod, and at least a portion of each of which is engaged with the sliding groove;

[0012] A plurality of claws, each of the claws being connected to the other end of a connecting rod;

[0013] A mold cavity, wherein the mold cavity is mounted on the positioning plate, and the positioning sleeve, the demoulding frame and the locking shaft are all arranged in the mold cavity;

[0014] A mold cover, the mold cover is arranged at the upper end of the mold cavity, the mold cover comprises: a cover-shaped portion and a rod-shaped portion, the rod-shaped portion is arranged at the upper end of the cover-shaped portion, the cover-shaped portion, the mold cavity and the positioning plate together form an accommodating space, the positioning sleeve, the demoulding frame, the first bearing, the second bearing, the plurality of claws, the plurality of connecting rods and the locking shaft are all arranged in the accommodating space;

[0015] A handle is operably engaged with the top end of the locking shaft.

[0016] The above-mentioned large aspect ratio polyurethane roller casting mold further includes: a first shaft retaining ring and a second shaft retaining ring, the first shaft retaining ring is arranged between one end of the demolding frame and the first bearing, the second shaft retaining ring is arranged at the lower end of the second bearing, and the first shaft retaining ring and the second shaft retaining ring are respectively against the first bearing and the second bearing.

[0017] The above-mentioned large aspect ratio polyurethane roller casting mold, wherein each of the connecting rods includes: a first end, a bending portion and a second end, the bending portion connects the first end and the second end, there is a first angle between the first end and the second end, and at least a portion of the first end is arranged in the positioning seat.

[0018] The above-mentioned large aspect ratio polyurethane roller casting mold, wherein the first end is horizontally arranged, the second end is vertically arranged, the first pin is vertically arranged, the first pin passes through the first end, and the lower end of the first pin is embedded in the slide groove.

[0019] The above-mentioned large aspect ratio polyurethane roller casting mold further includes: a second pin, wherein the second pin connects the second end and the claw.

[0020] The above-mentioned large aspect ratio polyurethane roller casting mold further includes: a third pin, which is vertically arranged and passes through the connecting rod, and the third pin passes through at least a portion of the positioning seat.

[0021] The above-mentioned large aspect ratio polyurethane roller casting mold further includes: screws, which connect the positioning plate and the cavity.

[0022] Due to the adoption of the above technology, the present invention has the following positive effects compared with the prior art:

[0023] (1) The polyurethane roller of the present invention is made by placing a metal wheel core into a casting mold and pouring polyurethane raw materials on the outer cylindrical surface of the wheel core, thereby solving the problem that the outer cylindrical surface of the polyurethane layer of the manufactured polyurethane roller and the hole of the wheel core have a certain coaxiality error. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded schematic diagram of the polyurethane roller casting mold with a large aspect ratio of the present invention.

[0025] Figure 2 It is a schematic diagram of a demoulding frame of a polyurethane roller casting mold with a large aspect ratio according to the present invention.

[0026] Figure 3 It is a schematic cross-sectional view of the polyurethane roller casting mold with a large aspect ratio of the present invention.

[0027] Figure 4 It is a schematic top view of the polyurethane roller casting mold with a large aspect ratio of the present invention.

[0028] In the accompanying drawings: 1. handle; 2. mold cover; 3. mold cavity; 4. demoulding frame; 5. first bearing; 51. second bearing; 6. locking shaft; 7. claw; 8. first pin; 9. second pin; 10. third pin; 11. positioning seat; 12. screw; 13. retaining ring for first shaft; 131. retaining ring for second shaft; 14. connecting rod. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Figure 1 Schematic diagram of an explosion of a polyurethane roller casting mold with a large aspect ratio of the present invention; Figure 2 Schematic diagram of a demoulding frame of a polyurethane roller casting mold with a large aspect ratio of the present invention; Figure 3 1 is a schematic cross-sectional view of a polyurethane roller casting mold with a large aspect ratio according to the present invention;

[0030] Figure 4 This is a schematic diagram of a top view of a polyurethane roller casting mold with a large aspect ratio of the present invention, see Figures 1 to 4FIG. 1 shows a preferred embodiment of a polyurethane roller casting mold with a large aspect ratio, comprising:

[0031] The locking shaft 6 includes a shaft body and a locking disk. The locking disk is arranged in the middle of the locking shaft 6. The locking shaft 6 and the locking disk are fixedly connected. The locking shaft 6 passes through the center of the locking disk. A plurality of sliding grooves are opened on the upper surface of the locking disk.

[0032] The first bearing 5 and the second bearing 51 are both sleeved on the locking shaft 6, and the first bearing 5 is arranged above the second bearing 51;

[0033] The demoulding frame 4 has one end sleeved on the top of the locking shaft 6, and the bracket portion of the demoulding frame 4 is arranged around the locking shaft 6;

[0034] The positioning seat 11 includes: a positioning sleeve and a positioning plate, the positioning sleeve and the positioning plate are connected, the positioning sleeve is arranged at the upper end of the positioning plate, the bottom end of the locking shaft 6 is installed in the positioning sleeve, the bracket portion of the demoulding frame 4 is arranged around the periphery of the positioning seat 11, the bottom end of the bracket of the demoulding frame 4 is against the upper surface of the positioning plate, the second bearing 51 is arranged in the positioning seat 11, a plurality of transverse grooves are opened on the positioning plate, a plurality of positioning slots are opened on the positioning plate, and each bracket of the demoulding frame 4 is matched with a positioning slot;

[0035] A plurality of connecting rods 14, each connecting rod 14 passes through a transverse slot, one end of the connecting rod 14 is disposed in a positioning sleeve, and the other end of the connecting rod 14 is disposed outside the positioning sleeve;

[0036] A plurality of first pins 8, each of which is disposed in a positioning sleeve, each of which passes through one end of a connecting rod 14, and the lower ends of the plurality of first pins 8 are engaged with a sliding groove;

[0037] A plurality of claws 7, each claw 7 is connected to the other end of a connecting rod 14;

[0038] Cavity 3, cavity 3 is mounted on the positioning plate, and the positioning sleeve, demoulding frame 4 and locking shaft 6 are all arranged in cavity 3;

[0039] The mold cover 2 is arranged at the upper end of the mold cavity 3. The mold cover 2 includes: a cover-shaped portion and a rod-shaped portion. The rod-shaped portion is arranged at the upper end of the cover-shaped portion. The cover-shaped portion, the mold cavity 3 and the positioning plate together form an accommodating space. The positioning sleeve, the demoulding frame 4, the first bearing 5, the second bearing 51, the plurality of claws 7, the plurality of connecting rods 14 and the locking shaft 6 are all arranged in the accommodating space.

[0040] The handle 1 is operably matched with the top end of the locking shaft 6 .

[0041] In a preferred embodiment, it also includes: a first shaft retaining ring 13 and a second shaft retaining ring 131, the first shaft retaining ring 13 is arranged between one end of the demolding frame 4 and the first bearing 5, the second shaft retaining ring 131 is arranged at the lower end of the second bearing 51, and the first shaft retaining ring 13 and the second shaft retaining ring 131 are respectively against the first bearing 5 and the second bearing 51.

[0042] It is worth noting that the first shaft retaining ring 13 and the second shaft retaining ring 131 are provided to prevent the first bearing 5 and the second bearing 51 from being separated from the locking shaft 6 .

[0043] In a preferred embodiment, each connecting rod 14 includes: a first end, a bending portion and a second end, the bending portion connects the first end and the second end, there is a first angle between the first end and the second end, and at least a portion of the first end is arranged in the positioning seat 11.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the implementation and protection scope of the present invention.

[0045] The present invention also has the following implementation modes based on the above:

[0046] In a further embodiment of the present invention, the first end is horizontally arranged, the second end is vertically arranged, the first pin 8 is vertically arranged, the first pin 8 passes through the first end, and at least a portion of the first pin 8 is embedded in the slide groove.

[0047] In a further embodiment of the present invention, the present invention further comprises: a second pin 9 , which connects the second end portion and the claw 7 .

[0048] In a further embodiment of the present invention, the present invention further comprises: a third pin 10 , which is vertically arranged. The third pin 10 passes through the connecting rod 14 , and the third pin 10 passes through at least a portion of the positioning seat 11 .

[0049] In a further embodiment of the present invention, it further comprises: a screw 12 , which connects the positioning plate and the cavity 3 .

[0050] In a preferred embodiment, the present invention further comprises: a method for using a polyurethane roller casting mold with a large aspect ratio, the method comprising:

[0051] Step S1: Fix the positioning seat 11 to the tray of the casting production line with a fixing device, first remove the handle 1 from the locking shaft 6, place the wheel core on the demoulding frame 4, then place the demoulding frame 4 in the mold, and then install the handle 1 on the locking shaft 6;

[0052] Step S2: Rotate the handle 1 clockwise to drive the locking shaft 6 to rotate clockwise. The groove on the wheel disc in the middle of the locking shaft 6 pushes the connecting rod 14 to swing, driving the claw 7 to move away from the positioning seat 11 in the radial direction of the positioning seat 11. The claw 7 expands the inner hole of the polyurethane wheel core.

[0053] Step S3: Remove the handle 1, cover it with the mold cover 2, pour liquid polyurethane raw material into the mold cavity 3, and after the polyurethane raw material solidifies, remove the mold cover 2, install the handle 1, rotate the handle 1 counterclockwise to a preset position, and remove the handle 1;

[0054] Step S4: taking the demoulding frame 4 out of the mold cavity 3 , and the demoulding frame 4 drives the polyurethane wheel to be ejected from the mold cavity 3 .

[0055] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A polyurethane roller casting mold with a large aspect ratio, characterized in that: include: A locking shaft, comprising: a shaft body and a locking disk, wherein the locking disk is disposed in the middle of the locking shaft, the locking shaft and the locking disk are fixedly connected, the locking shaft passes through the center of the locking disk, and a plurality of sliding grooves are formed on the upper surface of the locking disk; a first bearing and a second bearing, wherein the first bearing and the second bearing are both sleeved on the locking shaft, and the first bearing is arranged above the second bearing; a demoulding frame, one end of which is sleeved on the top end of the locking shaft, and a bracket portion of the demoulding frame is arranged around the locking shaft; The positioning seat comprises: a positioning sleeve and a positioning plate, the positioning sleeve is connected to the positioning plate, the positioning sleeve is arranged at the upper end of the positioning plate, the bottom end of the locking shaft is installed in the positioning sleeve, the bracket portion of the demoulding frame is arranged around the periphery of the positioning seat, the bottom end of the bracket of the demoulding frame is against the upper surface of the positioning plate, the second bearing is arranged in the positioning seat, the positioning plate is provided with a plurality of transverse grooves, the positioning plate is provided with a plurality of positioning slots, and each bracket of the demoulding frame is matched with one of the positioning slots; a plurality of connecting rods, each of which passes through one of the transverse slots, one end of each connecting rod being disposed in the positioning sleeve, and the other end of each connecting rod being disposed outside the positioning sleeve; a plurality of first pins, wherein the plurality of first pins are disposed in the positioning sleeve, each of the first pins passes through one end of the connecting rod, and the plurality of first pins are engaged with the sliding groove; A plurality of claws, each of the claws being connected to the other end of a connecting rod; A mold cavity, wherein the mold cavity is mounted on the positioning plate, and the positioning sleeve, the demoulding frame and the locking shaft are all arranged in the mold cavity; A mold cover, the mold cover is arranged at the upper end of the mold cavity, the mold cover comprises: a cover-shaped portion and a rod-shaped portion, the rod-shaped portion is arranged at the upper end of the cover-shaped portion, the cover-shaped portion, the mold cavity and the positioning plate together form an accommodating space, the positioning sleeve, the demoulding frame, the first bearing, the second bearing, the plurality of claws, the plurality of connecting rods and the locking shaft are all arranged in the accommodating space; a handle operably engaged with a top end of the locking shaft; When the handle is rotated clockwise to drive the locking shaft to rotate clockwise, the sliding groove on the locking disk in the middle of the locking shaft pushes the connecting rod to swing, thereby driving the claw to move away from the positioning seat in the radial direction of the positioning seat, thereby causing the claw to expand the inner hole of the polyurethane wheel core.

2. The polyurethane roller casting mold with a large aspect ratio according to claim 1, characterized in that: Also includes: The first shaft retaining ring and the second shaft retaining ring are arranged between one end of the demoulding frame and the first bearing, and the second shaft retaining ring is arranged at the lower end of the second bearing. The first shaft retaining ring and the second shaft retaining ring are respectively against the first bearing and the second bearing.

3. The polyurethane roller casting mold with a large aspect ratio according to claim 1, characterized in that: Each connecting rod includes: a first end, a bending portion and a second end, the bending portion connects the first end and the second end, there is a first angle between the first end and the second end, and at least a portion of the first end is arranged in the positioning seat.

4. The polyurethane roller casting mold with a large aspect ratio according to claim 3, characterized in that: The first end is arranged horizontally, the second end is arranged vertically, the first pin is arranged vertically, the first pin passes through the first end, and at least a portion of the first pin is embedded in the sliding groove.

5. The polyurethane roller casting mold with a large aspect ratio according to claim 4, characterized in that: Also includes: A second pin connects the second end portion and the claw.

6. The polyurethane roller casting mold with a large aspect ratio according to claim 1, characterized in that: Also includes: A third pin is vertically arranged, passes through the connecting rod, and passes through at least a portion of the positioning seat.

7. The polyurethane roller casting mold with a large aspect ratio according to claim 1, characterized in that: Also includes: A screw connects the positioning plate and the cavity.

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