CN216682995U

CN216682995U - Forming die of polishing roller

Info

Publication number: CN216682995U
Application number: CN202122887320.1U
Authority: CN
Inventors: 周志炎
Original assignee: Hubei Yuxing Crystal Jewelry Co ltd
Current assignee: Hubei Yuxing Crystal Jewelry Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-07
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a forming die of a polishing roller, and belongs to the technical field of water drill processing. The forming die comprises a die seat of the forming die, a base plate, an outer die, an inner die, a supporting plate, a gland and a pull rod; the lower part in the die seat is coaxially provided with a support ring, and the inner diameter of the support ring is gradually increased from bottom to top; the backing plate is arranged on the supporting convex ring, the outer side of the backing plate is in clearance fit with the inner wall of the die seat, and the upper side of the backing plate is coaxially provided with a positioning hole matched with the lower end of the inner die; the lower end of the outer die is arranged on the upper side of the backing plate, the upper end of the outer die is flush with or higher than the upper end of the die seat, and the outer wall of the outer die is in clearance fit with the inner wall of the die seat; the inner mold is formed by combining a plurality of arc-shaped flaps, the inner diameter of the inner mold is gradually increased from bottom to top, the lower end of the inner mold is inserted into the positioning hole, and the upper end of the inner mold is higher than the upper end of the outer mold; the supporting plate is of a circular structure; the gland is a round cover matched with the upper end of the inner mold and is covered on the upper end of the inner mold. The polishing roller can be obtained at normal pressure and normal temperature, and is easy to demould; the obtained polishing roller has long service life.

Description

Forming die of polishing roller

Technical Field

The utility model belongs to the technical field of water drill processing, and particularly relates to a forming die of a polishing roller.

Background

The rhinestone is a very important accessory of ornaments and clothes, and the traditional polishing roller for the rhinestone is a cylindrical polishing wheel in an integral form for polishing the surface of the rhinestone.

The existing water drill processing grinding wheel comprises a cylindrical carbon steel grinding wheel base body and at least one polishing roller which is sleeved outside the carbon steel grinding wheel base body and is arranged along the axial direction of the carbon steel grinding wheel base body, wherein the polishing roller is formed by sintering cerium oxide polishing powder, phenolic resin and the like, and has the advantages of long service life, high flatness of a polishing surface and the like, and the polishing roller is of a cylindrical structure and is adhered to the carbon steel grinding wheel base body through resin adhesive. The polishing drum can be obtained by the following process: mixing raw materials, molding, pressurizing, pressure maintaining, heating and curing, and the like, wherein a molding die is used in the molding, pressurizing and pressure maintaining processes, and a molding die cavity matched with the shape of the polishing roller is arranged in the molding die.

The patent for application number CN 201920326625.5 discloses an equipment of polishing drum on preparation polishing cylinder, the polishing drum is formed by the preparation of the design cover of customization, the design cover is including the awl section of thick bamboo that inside cavity set up, the fixed connection platform that is provided with of both ends outer wall about the awl section of thick bamboo, the symmetry is provided with the screw thread through-hole between the upper and lower connection platform connect the platform bottom still to be provided with circular baffle down, the circular baffle radius is not less than connect the circular shape radius that platform outer fringe formed down, fixed mounting has solid circular cone post in the middle of the circular baffle, circular cone post with the coaxial setting of awl section of thick bamboo, also the interval evenly is provided with the screw hole on the circular baffle contour direction, connect the platform from top to bottom with fasten through the bolt between the circular baffle.

The preparation process of the polishing roller comprises the following steps: mixing polishing powder, resin, promoter and curing agent, adding into a forming mold, die-casting on a press, maintaining pressure at 150 deg.C, heating and curing for more than 5 hr, cooling, and finishing.

The following problems exist for the preparation process: the molding needs pressurization and heating, the equipment is complex, the energy consumption is good, the processing time is long (the total time is more than 12 hours), and the like; the processing effect on products with larger diameters (the diameter of the glass beads is more than 2.5 mm) is poor, and the products are easy to crack and have cracks.

The following problems exist for the product: the service life is short, and for processing the rhinestone with the diameter of more than 2.6mm, the service life is 20-25 days (more than 22 hours per day).

There are the following problems with the forming die: for demolding, the product is usually tapered to increase the difficulty of subsequent processing, and the product is not easy to demold.

SUMMERY OF THE UTILITY MODEL

In order to solve the foregoing problems, embodiments of the present invention provide a forming mold for a polishing roller, which facilitates demolding. The technical scheme is as follows:

the embodiment of the utility model provides a forming die of a polishing roller, which comprises a die seat 1, a base plate 2 at the inner lower part of the die seat 1, an outer die 3 positioned on the upper side of the base plate 2 in the die seat 1, an inner die 4 positioned on the upper side of the base plate 2 in the outer die 3, a supporting plate 5 in the middle of the inner die 4, a gland 6 at the upper end of the inner die 4 and a pull rod 7 which penetrates through the gland 6 downwards and is detachably arranged on the upper side of the supporting plate 5; the die seat 1, the backing plate 2, the outer die 3, the inner die 4, the supporting plate 5 and the gland 6 are all coaxially arranged with the polishing roller, and the backing plate 2, the outer die 3 and the inner die 4 enclose a ring groove for forming the polishing roller; the die holder 1 is cylindrical, the inner lower part of the die holder is coaxially provided with a support ring 9, and the inner diameter of the die holder is gradually increased from bottom to top; the backing plate 2 is in a circular ring shape and is arranged on the supporting convex ring 9, the outer side of the backing plate is in clearance fit with the inner wall of the die seat 1, and the upper side of the backing plate is coaxially provided with a positioning hole 10 matched with the lower end of the inner die 4; the outer die 3 is cylindrical, the lower end of the outer die is arranged on the upper side of the backing plate 2, the upper end of the outer die is flush with the upper end of the die seat 1 or higher than the upper end of the die seat 1, and the outer wall of the outer die is in clearance fit with the inner wall of the die seat 1; the inner die 4 is cylindrical and is formed by combining a plurality of arc-shaped flaps 16, the inner diameter of the inner die is gradually increased from bottom to top, the lower end of the inner die is inserted into the positioning hole 10, and the upper end of the inner die is higher than the upper end of the outer die 3; the supporting plate 5 is a circular structure matched with the middle part of the inner wall of the inner die 4; the gland 6 is a round cover which is matched with the upper end of the inner die 4 and is open downwards, and the round cover is covered on the upper end of the inner die 4.

Further, an annular boss 11 is coaxially arranged at the upper end of the inner die 4 in the embodiment of the present invention, the diameter of the annular boss 11 is smaller than the outer diameter of the inner die 4 and is matched with the inner diameter of the gland 6, and the annular boss 11 is embedded in the cover opening of the gland 6.

The pull rod 7 in the embodiment of the utility model is a round rod which is coaxial with the polishing roller, the lower end of the pull rod is in threaded connection with the circle center of the supporting plate 5, and the upper end of the pull rod is provided with a pull ring 8.

Preferably, the center of the gland 6 in the embodiment of the present invention is provided with a through hole 15 for the pull rod 7 to pass through, and the top of the through hole is arranged obliquely downwards from the center to the outer edge.

Further, the outer edge of the supporting plate 5 in the embodiment of the utility model is turned upwards to form a cylindrical supporting edge 13, the supporting edge 13 is coaxially arranged with the polishing drum, and the outer side of the supporting edge 13 is tightly matched with the middle part of the inner wall of the inner die 4.

Specifically, the inner mold 4 in the embodiment of the present invention is composed of three lobes 16, and includes two large lobes and one small lobe, where a central angle of the small lobe is less than or equal to 60 °, and a central angle of the large lobe is greater than or equal to 120 °.

Preferably, the petals 16 in embodiments of the present invention are coated at both ends with kraft paper 14.

The technical scheme provided by the embodiment of the utility model has the following beneficial effects: the embodiment of the utility model provides a forming die of a polishing roller, which is more convenient for demoulding.

Drawings

FIG. 1 is a schematic structural view of a molding die of a burnishing barrel in an embodiment of the present invention;

FIG. 2 is a schematic structural view of the inner mold;

fig. 3 is a flowchart of a method for manufacturing a polishing drum according to an embodiment of the present invention.

In the figure: the die comprises a die base 1, a backing plate 2, an outer die 3, an inner die 4, a supporting plate 5, a gland 6, a pull rod 7, a pull ring 8, a supporting convex ring 9, a positioning hole 10, an annular boss 11, an annular groove 12, a supporting edge 13, kraft paper 14, a through hole 15 and a petal piece 16.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Embodiment 1 discloses a method for manufacturing a polishing drum, the method comprising:

s101: 18kg of 805 resin, 55kg of polishing powder and an auxiliary agent are sequentially mixed, wherein the auxiliary agent comprises 0.5kg of an accelerator, 0.4kg of a curing agent, 0.2kg of dibutyl phthalate and 1.5kg of magnesium sulfate, and the mixture is stirred at room temperature for 15 minutes to obtain a casting solution.

S102: and (3) coating demolding oil on the forming die.

S103: adding the casting liquid into the molding die, and stirring the top of the molding die before the casting liquid is filled in the molding die.

S104: after completion of casting, the mixture was allowed to stand at room temperature for 60 minutes.

S105: the product is removed from the outer mold 3 together with the inner mold 4.

S106: after standing at room temperature for 120 minutes, the product was separated from the inner mold 4.

S107: and (5) performing finish machining on the product.

The whole processing time is less than 8h, and the processing is easy for factory treatment.

The product was tested: the diameter of the glass bead processed by the rhinestone is 3.0mm, the service life is 35 days, the roughness of the surface of the rhinestone is less than 40nm, and the processed product basically has no fragmentation and no obvious crack.

Example 2

Embodiment 2 discloses a method for manufacturing a polishing drum, the method comprising:

s101: 20kg of 805 resin, 54kg of polishing powder and an auxiliary agent are sequentially mixed, wherein the auxiliary agent comprises 0.5kg of an accelerating agent, 0.5kg of a curing agent, 0.25kg of dibutyl phthalate and 1.8kg of magnesium sulfate, and the mixture is stirred at room temperature for 18 minutes to obtain a casting solution.

S102: and (3) coating demolding oil on the forming die.

S106: after standing at room temperature for 110 minutes, the product was separated from the inner mold 4.

S107: and (5) performing finish machining on the product.

The product was tested: the diameter of the glass bead processed by the rhinestone is 2.6mm, the service life is 37 days, the roughness of the surface of the rhinestone is less than 40nm, and the processed product basically has no fragmentation and no obvious crack.

Example 3

Referring to fig. 1 and 2, embodiment 3 provides a forming die for a polishing roller, which comprises a die base 1, a backing plate 2 at the inner lower part of the die base 1, an outer die 3 positioned at the upper side of the backing plate 2 in the die base 1, an inner die 4 positioned at the upper side of the backing plate 2 in the outer die 3, a supporting plate 5 at the inner middle part of the inner die 4, a gland 6 at the upper end of the inner die 4, a pull rod 7 penetrating the gland 6 downwards and detachably arranged at the upper side of the supporting plate 5, and the like. The die seat 1, the backing plate 2, the outer die 3, the inner die 4, the supporting plate 5 and the gland 6 are all arranged coaxially with the polishing roller, and the backing plate 2, the outer die 3 and the inner die 4 enclose a ring groove for forming the polishing roller. The die holder 1 is cylindrical, the inner lower part of the die holder is coaxially provided with a support ring 9, the inner diameter of the die holder is gradually increased from bottom to top so as to be convenient for demoulding, and the inner wall of the die holder is smooth. Wherein, the support ring 9 is a circular ring coaxially arranged with the die holder 1, and the inner diameter thereof is larger than that of the backing plate 2. The backing plate 2 is circular, is arranged on the supporting convex ring 9, the outer side of the backing plate is in clearance fit with the inner wall of the die holder 1, the upper side of the backing plate is coaxially provided with a positioning hole 10 (specifically, a vertically arranged round hole which forms a stepped hole with the central hole of the backing plate 2 so that an ejector rod (usually, the ejector rod is not used, and preferably, the supporting plate 5 is separated by a pull rod 7) penetrates through the positioning hole to push the supporting plate 5 upwards, and the inner diameter of the backing plate is smaller than the inner diameter of the inner die 4. The outer die 3 is cylindrical, the lower end of the outer die is arranged on the upper side of the backing plate 2, the upper end of the outer die is flush with (preferably higher than) the upper end of the die holder 1 so as to prevent the pouring liquid from entering a gap between the outer die 3 and the die holder 1, the outer wall of the outer die (which is a cone with a large upper part and a small lower part) is in clearance fit with the inner wall of the die holder 1, the outer wall of the outer die is smooth, and the outer die is not required to be detached from the die holder 1 under normal conditions. The inner mold 4 is cylindrical and is formed by combining a plurality of arc-shaped flaps 16, the inner diameter of the inner mold is gradually increased from bottom to top so as to facilitate the placing of the supporting plate 5, the lower end of the inner mold is inserted into the positioning hole 10, and the upper end of the inner mold is higher than the upper end of the outer mold 3 so as to prevent the pouring liquid from entering the inner mold 4. The supporting plate 5 (the diameter is the same as that of the middle part of the inner wall of the inner die 4) is of a circular structure matched with the middle part of the inner wall of the inner die 4. The gland 6 is a round cap which is matched with the upper end of the inner mold 4 and is open downwards, and the gland is covered on the upper end of the inner mold 4. The lower end of the inner die 4 is inwardly shrunk through the positioning hole 10, the upper end of the inner die is inwardly shrunk through the gland 6, and the middle part of the inner die is outwardly expanded through the supporting plate 5; the stability of the inner mould 4 can be ensured by the action of the three positions.

In the embodiment of the present invention, the taper angles of the inner wall of the mold base 1, the outer wall of the outer mold 3, and the inner wall of the inner mold 4 are all 1 °. Of course, other tapers may be used as desired.

Further, referring to fig. 1, the upper end of the inner mold 4 in the embodiment of the present invention is coaxially provided with an annular boss 11 (the inner wall is flush with the inner wall of the inner mold 4), the diameter of the annular boss 11 is smaller than the outer diameter of the inner mold 4 and is matched with the inner diameter of the gland 6, and the annular boss 11 is embedded in the cover opening of the gland 6.

Referring to fig. 1, the pull rod 7 in the embodiment of the present invention is a round rod coaxially disposed with the polishing drum, and has a lower end in threaded connection with a center of the supporting plate 5 (on which a threaded hole is correspondingly formed), and an upper end provided with a pull ring 8 (specifically, a ring, which is located above the gland 6).

Preferably, referring to fig. 1, the gland 6 in the embodiment of the present invention is provided with a through hole 15 (specifically, a vertically arranged circular hole) at the center of the circle for the pull rod 7 to pass through, and the top (preferably smooth) of the through hole is arranged obliquely downward from the center to the outer edge to ensure that the casting liquid enters between the inner mold 4 and the outer mold 3.

Further, referring to fig. 1, the outer edge of the bracing plate 5 in the embodiment of the present invention is folded upwards to form a cylindrical bracing edge 13, and the bracing edge 13 is coaxially arranged with the polishing drum and the outer side (preferably smooth) thereof is tightly fitted with the middle part of the inner wall (preferably smooth) of the inner mold 4.

Specifically, referring to fig. 2, the inner mold 4 in the embodiment of the present invention is composed of three flaps 16 to facilitate the detachment of the inner mold 4 from the product, and includes two large flaps and one small flap, the central angle of the small flap is equal to or less than 60 °, and the central angle of the large flap is equal to or more than 120 °. The angle of the end faces of the two ends of the small flap, which are in contact with the large flap, ensures that the small flap can be taken out inwards.

Preferably, referring to fig. 2, the two ends of the petals 16 (the two ends in contact with the large petals) in an embodiment of the present invention are coated with kraft paper 14 for sealing. The inner die 4 can be cut and processed by a round steel pipe.

Example 4

Referring to fig. 3, an embodiment of the present invention provides a method for manufacturing a polishing drum, including:

s101: and sequentially mixing 805 resin, polishing powder and an auxiliary agent according to the proportion, wherein the auxiliary agent comprises an accelerating agent, a curing agent, dibutyl phthalate and magnesium sulfate, and stirring at room temperature for 10-20 minutes to obtain the casting solution.

S102: the forming die (generally, the upper side of the backing plate 2, the inner wall of the outer die 3 and the outer wall of the inner die 4) is coated with the mold release oil.

S103: and adding the casting liquid into the molding die, stirring the top of the molding die before the casting liquid fills the molding die, and flattening the top of the casting liquid when the molding die is basically filled (if the casting is stopped at a position 1cm away from the top of the outer die 3).

S104: and after the pouring is finished, standing for 40-75 minutes at room temperature.

S105: the product is removed from the outer mould 3 together with the inner mould 4 and, if separation is difficult, the product, the inner mould 4 and the outer mould 3 are removed from the mould holder 1 together.

S106: after standing for 100-150 minutes at room temperature, the product is separated from the inner mold 4, and in the process, the product continuously generates heat.

S107: the product is subjected to finishing (including cylindrical grinding and internal roughening (e.g., machining a helix)).

Specifically, in step S103, the pull rod 7 is not fixed to the supporting plate 5, and the through hole 15 of the cover 6 is shielded by the cover. In step S105, the tie rods 7 are mounted on the gusset 5, and the product is taken out from the outer mold 3 together with the inner mold 4 by pulling up the tie rods 7. If the product and the inner mold 4 cannot be removed from the outer mold 3, the product, the inner mold 4 and the outer mold 3 are removed from the mold base 1 by pressing the shim plate 2 upward. In step S106, the bracing plate 5 and the gland 6 are separated from the inner mold 4 by pulling up the pull rod 7, the small flaps are firstly removed inwards, and then the two large flaps are removed to obtain the product.

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 utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A forming die of a polishing roller is characterized by comprising a die seat (1), a backing plate (2) at the lower part in the die seat (1), an outer die (3) which is arranged in the die seat (1) and positioned at the upper side of the backing plate (2), an inner die (4) which is arranged in the outer die (3) and positioned at the upper side of the backing plate (2), a supporting plate (5) at the middle part in the inner die (4), a gland (6) at the upper end of the inner die (4) and a pull rod (7) which penetrates through the gland (6) downwards and is detachably arranged at the upper side of the supporting plate (5); the die seat (1), the backing plate (2), the outer die (3), the inner die (4), the supporting plate (5) and the gland (6) are all arranged coaxially with the polishing roller, and the backing plate (2), the outer die (3) and the inner die (4) enclose to form a ring groove of the polishing roller; the die seat (1) is cylindrical, a supporting convex ring (9) is coaxially arranged at the inner lower part of the die seat, and the inner diameter of the die seat is gradually increased from bottom to top; the backing plate (2) is annular and is arranged on the supporting convex ring (9), the outer side of the backing plate is in clearance fit with the inner wall of the die seat (1), and the upper side of the backing plate is coaxially provided with a positioning hole (10) matched with the lower end of the inner die (4); the outer die (3) is cylindrical, the lower end of the outer die is arranged on the upper side of the backing plate (2), the upper end of the outer die is flush with the upper end of the die seat (1) or higher than the upper end of the die seat (1), and the outer wall of the outer die is in clearance fit with the inner wall of the die seat (1); the inner die (4) is cylindrical and is formed by combining a plurality of arc-shaped flaps (16), the inner diameter of the inner die is gradually increased from bottom to top, the lower end of the inner die is inserted into the positioning hole (10), and the upper end of the inner die is higher than the upper end of the outer die (3); the supporting plate (5) is of a circular structure matched with the middle part of the inner wall of the inner die (4); the gland (6) is a round cover which is matched with the upper end of the inner die (4) and is open downwards, and the gland is covered on the upper end of the inner die (4).

2. The forming die of the polishing drum as recited in claim 1, characterized in that the upper end of the inner die (4) is coaxially provided with an annular boss (11), the diameter of the annular boss (11) is smaller than the outer diameter of the inner die (4) and is matched with the inner diameter of the gland (6), and the annular boss (11) is embedded in the cover opening of the gland (6).

3. The forming die of the polishing drum as claimed in claim 1, wherein the pull rod (7) is a round rod coaxially arranged with the polishing drum, the lower end of the pull rod is in threaded connection with the center of the supporting plate (5), and the upper end of the pull rod is provided with a pull ring (8).

4. The forming die of the polishing drum according to claim 3, characterized in that the gland (6) is provided with a through hole (15) at the center for the pull rod (7) to pass through and the top of the gland is arranged obliquely downwards from the center to the outer edge.

5. The forming die of the polishing drum as claimed in claim 1, wherein the outer edge of the supporting plate (5) is folded upwards to form a cylindrical supporting edge (13), the supporting edge (13) is coaxially arranged with the polishing drum, and the outer side of the supporting edge is tightly matched with the middle part of the inner wall of the inner die (4).

6. The forming die of the polishing drum as set forth in claim 1, wherein the inner die (4) is composed of three lobes (16), including two large lobes and one small lobe, the central angle of the small lobe is 60 ° or less, and the central angle of the large lobe is 120 ° or more.

7. The forming tool of the burnishing drum of claim 1, wherein both ends of the flaps (16) are coated with kraft paper (14).