CN213291056U

CN213291056U - Polyurethane rubber-coated part casting mold

Info

Publication number: CN213291056U
Application number: CN202021772954.1U
Authority: CN
Inventors: 高晓明
Original assignee: Shanghai Bosheng Polyurethane Products Co ltd
Current assignee: Shanghai Bosheng Polyurethane Products Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-05-28
Anticipated expiration: 2030-08-21

Abstract

The utility model relates to a polyurethane rubber coating spare casting mold, the on-line screen storage device comprises a base, can dismantle on the base and be connected with the external mold, the upper end of external mold can be dismantled and be connected with the upper cover, set up the sprue gate rather than the inner chamber intercommunication on the upper surface of upper cover, coaxial being fixed with the passage on the inner wall of sprue gate, it inserts first being fixed with a plurality of around its circumference interval is even on the upper surface of upper cover, be fixed with the second on the inner wall of external mold and insert, the intracavity of external mold is provided with the centre form, the centre form is fixed on the upper surface of base, the upper end of centre form is fixed with the baffle, insert around the equal being fixed with a plurality of third in its circumference interval on the upper surface of baffle, coaxial being fixed with the reference column on the upper surface of baffle. The application has the effects of one-step forming, reduction of machining procedures and improvement of production efficiency.

Description

Polyurethane rubber-coated part casting mold

Technical Field

The application relates to the technical field of casting molding of polyurethane rubber-coated parts, in particular to a casting mold of a polyurethane rubber-coated part.

Background

The polyurethane rubber coating piece comprises a polyurethane rotor, a polyurethane dispersing wheel, a polyurethane impeller blade, a polyurethane upper cap and the like, and the polyurethane rubber coating is used for coating a material which is made of polyurethane on a new material different from the polyurethane as the name suggests.

In the existing rubber coating process of processing a polyurethane dispersion wheel, a plurality of concave-convex grooves on a workpiece cannot be formed by one-time injection molding, so that the existing manufacturers basically firstly form a rough model by injection molding and then realize the rough model by post-processing, but the production mode has low efficiency.

SUMMERY OF THE UTILITY MODEL

In order to improve production efficiency, this application provides a polyurethane rubber-covered piece casting mold.

The application provides a polyurethane rubber-coated part casting mold adopts following technical scheme:

the utility model provides a polyurethane rubber-coated part casting mold, includes the base, can dismantle on the base and be connected with the external mold, the upper end of external mold can be dismantled and be connected with the upper cover, set up the sprue gate rather than the inner chamber intercommunication on the upper surface of upper cover, coaxial being fixed with the passage on the inner wall of sprue gate, it inserts around the first a plurality of that is fixed with of its circumference interval is even on the upper surface of upper cover, be fixed with the second on the inner wall of external mold and insert, the intracavity of external mold is provided with the centre form, the centre form is fixed on the upper surface of base, the upper end of centre form is fixed with the baffle, it inserts around the equal a plurality of third that is fixed with of its circumference interval on the upper surface of baffle, coaxial being fixed with the reference column on the upper surface of baffle.

By adopting the technical scheme, before the pouring mold is assembled, positioning columns with proper sizes are selected in advance, the inner mold and the outer mold are fixed on the upper surface of the base in sequence, the partition plate is fixed at the upper end of the inner mold, the upper cover is covered at the upper end of the outer mold, molten polyurethane viscous liquid is poured into the inner cavity of the outer mold from the upper end of the material guide pipe in the pouring process, the poured polyurethane viscous liquid is uniformly divided by the third insert, the viscous liquid uniformly flows down from the periphery of the inner mold along the outer edge of the upper end of the inner mold until the polyurethane viscous liquid fills the space between the outer mold and the inner mold, cooling is carried out after a period of time, the upper cover and the outer mold are detached in sequence after the product is cooled and formed, the formed product can be taken out at the moment, the later-stage processing treatment is not required in the whole pouring process, and the whole process is formed at one time, the processing procedures are reduced, and the production efficiency is improved.

Preferably, first annular has been seted up on the upper surface of base, the outer wall of first annular intercommunication base, be fixed with annular protrusion on the upper surface of first annular, the second annular has been seted up on the lower extreme outer wall of external mold, the bottom surface of second annular intercommunication external mold, the internal cavity at first annular is inlayed to the external mold, annular protrusion inlays and establishes in the internal cavity of second annular, the external mold passes through hexagon socket head cap screw fixed connection with the base.

By adopting the technical scheme, the outer die is vertically inserted on the base, so that the lower end of the outer die is embedded in the inner cavity of the first ring groove, the annular protrusion is embedded in the inner cavity of the second ring groove, the complexity of a bonding path between the base and the outer die is increased by the annular protrusion, on one hand, the outer die is difficult to generate transverse displacement on the base, on the other hand, the sealing property of connection between the outer die and the base is enhanced, and polyurethane viscous liquid in the cavity between the inner die and the outer die is difficult to flow out of the outer die.

Preferably, a third annular groove is formed in the upper surface of the base, internal threads are formed in the inner walls of the two sides of the third annular groove, the rotating directions of the two internal threads are the same, external threads are formed in the outer walls of the two sides of the lower end of the inner die, and the inner die is in threaded connection with the inner wall of the third annular groove.

Through adopting above-mentioned technical scheme, when in the inner chamber with centre form threaded connection at the third annular, because the both sides of centre form all are provided with the screw thread, strengthened the joint strength between centre form and the base on the one hand, on the other hand has strengthened the leakproofness of junction between centre form and the base to make the interior polyurethane dope of cavity between centre form and the external mold be difficult to follow the junction between centre form and the base and flow into the inner chamber of centre form, improved the production quality of product.

Preferably, a fourth ring groove is formed in the upper surface of the inner die and communicated with the inner wall of the inner die, the lower surface of the partition plate is attached to the bottom surface of the inner wall of the fourth ring groove, and the partition plate is fixedly connected with the inner die through a hexagon socket head cap screw.

Through adopting above-mentioned technical scheme, the gap route of laminating is buckled more between baffle and the centre form, and the baffle inlays and establishes the upper end at the centre form, and the leakproofness between baffle and the centre form has been strengthened to the connected mode of step to make the polyurethane viscous liquid in the cavity between centre form and the external mold be difficult to flow into to the cavity of centre form from the gap department of baffle in, thereby improved the production quality of product.

Preferably, a fifth ring groove is formed in the upper end face of the outer die and communicated with the inner wall of the outer die, the bottom face of the upper cover is attached to the bottom face of the inner wall of the fifth ring groove, and the upper cover is fixedly connected to the upper end of the outer die through an inner hexagonal bolt.

Through adopting above-mentioned technical scheme, fifth ring groove intercommunication outer mould inner wall to carry out the step connection between messenger's upper cover and the outer mould, inlay the upper cover and establish in fifth ring groove, the gap of laminating between upper cover and the outer mould compares in original direct path of establishing the upper cover in the outer mould upper end and buckles more, and the leakproofness is better.

Preferably, a plurality of first air holes are uniformly formed in the outer wall of the inner die at intervals along the circumferential direction of the inner die, the aperture of each first air hole is smaller than three millimeters, and second air holes penetrate through the upper surface of the base.

Through adopting above-mentioned technical scheme, the aperture is for being less than three millimeters first bleeder vent makes the polyurethane dope between external mold and the centre form cavity difficult to flow to the cavity of centre form in from first bleeder vent to the product can produce the air at the shaping in-process, and the air that produces passes through the inner chamber that the second bleeder vent got into the centre form, and then passes through the second bleeder vent from the inner chamber of centre form and flows outside, has reduced the influence of space atmospheric pressure to product quality between centre form and the external mold, has improved the production quality of product.

Preferably, the reference column includes first circle piece and second circle piece, the coaxial mounting hole of having seted up on the upper surface of baffle, first circle piece threaded connection is on the inner wall of mounting hole, the mounting groove has been seted up on the bottom surface of second circle piece, erect groove and cross slot have been seted up on the inner wall of mounting groove, erect groove and cross slot intercommunication, be fixed with the lug on the outer wall of first circle piece, the lug slides and erects the groove and cross slot.

Through adopting above-mentioned technical scheme, before the pouring, according to the diameter of axle of product, change the second circle piece, make the lug slide in the inner chamber of erecting the groove on the lower extreme opening of erecting the groove in advance, when sliding the lug to the upper end of erecting the groove, rotate the second circle piece for the lug slides in the inner chamber of horizontal groove, thereby the second circle piece has just difficultly broken away from first circle piece.

Preferably, be provided with sealed the pad in the inner chamber of first annular, sealed pad is the zigzag, the laminating of the one end of sealed pad is on the bellied upper surface of annular, the laminating of the other end of sealed pad is on the inner wall bottom surface of first annular.

By adopting the technical scheme, the sealing gasket further enhances the sealing property between the outer die and the base, so that the polyurethane between the cavity of the outer die and the cavity of the inner die is difficult to leak out from the position of the first annular groove.

The application comprises at least one of the following beneficial technical effects:

1. the whole pouring process does not need post-processing treatment, and the whole process is formed at one time, so that the processing procedures are reduced, and the production efficiency is improved;

2. internal threads are formed on the inner walls of the two sides of the third ring groove, and external threads are formed on the outer walls of the two sides of the lower end of the inner die, so that the connection strength between the inner die and the base is enhanced on one hand, and the sealing performance of the connection position between the inner die and the base is enhanced on the other hand;

3. the first air holes and the second air holes are formed, so that the influence of the air pressure in the space between the inner mold and the outer mold on the product quality is reduced, and the production quality of the product is improved; by arranging the sealing gasket, the sealing property between the outer die and the base is enhanced, so that polyurethane viscous liquid between the outer die and the cavity of the inner die is difficult to leak out from the position of the first annular groove, and the processing quality of a product is improved.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a sectional view of the entire structure of the embodiment of the present application.

Fig. 3 is an exploded view of a portion of the structure of an embodiment of the present application.

Fig. 4 is a cross-sectional view of the overall structure of the positioning column in the embodiment of the present application.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Description of reference numerals: 1. a base; 2. an outer mold; 3. an upper cover; 4. a pouring gate; 5. a material guide pipe; 6. a first insert; 7. a second insert; 8. an inner mold; 9. a partition plate; 10. a third insert; 11. a positioning column; 12. a first ring groove; 13. an annular projection; 14. a second ring groove; 15. a third ring groove; 16. a fourth ring groove; 17. a fifth ring groove; 18. a first air vent; 19. a second air hole; 20. a first round block; 21. a second round block; 22. mounting holes; 23. mounting grooves; 24. a vertical slot; 25. a transverse groove; 26. a bump; 27. and a gasket.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a polyurethane rubber-coated part casting mold.

Referring to fig. 1, a polyurethane rubber-coated part casting mold comprises a base 1, wherein the base 1 is a circular plate, an outer mold 2 is connected to the base 1, the outer mold 2 is an annular plate, the outer mold 2 can be detached from the base 1, and an upper cover 3 is arranged on an upper opening of the outer mold 2.

Referring to fig. 2, a pouring gate 4 communicated with the inner cavity of the upper cover 3 is formed on the upper surface of the upper cover 3, so that when a polyurethane rubber-coated part is poured, the outer mold 2 is fixed on the base 1 in advance, then the upper cover 3 is fixed on the upper end opening of the outer mold 2, and liquid polyurethane viscous liquid is poured into the inner cavity of the outer mold 2 from the pouring gate 4, so that the shaping can be realized.

Referring to fig. 3, a first ring groove 12 is formed in the upper surface of a base 1, the first ring groove 12 is communicated with the outer wall of the base 1, an annular protrusion 13 is fixed on the upper surface of the first ring groove 12, a second ring groove 14 is formed in the outer wall of the lower end of an outer die 2, the second ring groove 14 is communicated with the bottom surface of the outer die 2, a sealing gasket 27 is arranged in an inner cavity of the first ring groove 12 in a padded mode, the cross section of the sealing gasket 27 is in a zigzag shape, one end of the sealing gasket 27 is attached to the upper surface of the annular protrusion 13, the edge of the other side of the sealing gasket 27 is attached to the bottom surface of the inner wall of the first ring groove 12, the outer die 2 is embedded in the inner cavity of the first ring groove 12, the annular protrusion 13 is embedded in the inner cavity of the second ring groove 14, and.

Referring to fig. 2 and 3, a fifth annular groove 17 is formed in the upper end surface of the outer mold 2, the fifth annular groove 17 is communicated with the inner wall of the outer mold 2, the bottom surface of the upper cover 3 is attached to the bottom surface of the inner wall of the fifth annular groove 17, and the upper cover 3 is fixedly connected with the outer film through an inner hexagonal bolt.

Referring to fig. 1 and 2, a material guide pipe 5 is coaxially fixed on the inner wall of the pouring gate 4, the material guide pipe 5 is communicated with the inner cavity of the outer mold 2, a plurality of first inserts 6 are uniformly fixed on the upper surface of the upper cover 3 at intervals around the axial direction of the upper cover, the first inserts 6 are irregular circular bulges, and the first inserts 6 are used for reducing the quality of a molded product on one hand and leaving a flower groove convenient for viewing on the outer wall of the molded product on the other hand.

Referring to fig. 3, be fixed with the second on the inner wall of external mold 2 and insert 7, the second inserts 7 and is the ring, the second inserts 7 and makes the product after the shaping, form an annular groove on the outer wall of shaping product, be provided with interior mould 8 in the inner chamber of external mold 2, third annular groove 15 has been seted up on the upper surface of base 1, all set up the internal thread on the both sides inner wall of third annular groove 15, two internal thread revolve to the same, the lower extreme both sides of interior mould 8 all set up with interior screw-thread fit's external screw thread, interior mould 8 threaded connection is on the inner wall of third annular groove 15, on the one hand, the joint strength between interior mould 8 and the base 1 has been strengthened, on the other hand, the leakproofness between interior mould 8 and the base 1 has been strengthened, the.

Referring to fig. 2 and 3, a fourth ring groove 16 is formed in the upper surface of the inner mold 8, the fourth ring groove 16 is communicated with the inner wall of the inner mold 8, a partition plate 9 is arranged on the upper end surface of the inner mold 8, the partition plate 9 is embedded in the bottom surface of the inner wall of the fourth ring groove 16, the partition plate 9 is fixed to the upper end of the inner mold 8 through an inner hexagon bolt between the partition plate 9 and the inner mold 8, and a plurality of third insert blocks 10 are uniformly fixed to the upper surface of the partition plate 9 at intervals around the circumferential direction of the partition plate 9, so that when liquid polyurethane milk viscous liquid flows downwards along the inner wall of the material guide pipe 5, the liquid polyurethane flows into a cavity between the inner mold 8 and the outer mold 2 from a gap between two adjacent third insert blocks 10, the third insert blocks 10 have a flow guide function, and have an effect that the polyurethane viscous liquid is uniformly dispersed.

Referring to fig. 3, a plurality of first air holes 18 are uniformly formed in the outer wall of the inner mold 8 at intervals along the circumferential direction of the outer wall, the aperture of each first air hole 18 is smaller than three millimeters, and second air holes 19 are formed in the upper surface of the base 1 in a penetrating manner, so that air can be generated in the product in the forming process, the generated air enters the inner cavity of the inner mold 8 through the second air holes 19, the air flows out of the outer space from the inner cavity of the inner mold 8 through the second air holes 19, and the influence of the space air pressure between the inner mold 8 and the outer mold 2 on the product quality is reduced.

Referring to fig. 4 and 5, a positioning column 11 is coaxially fixed on the upper surface of the partition board 9, the positioning column 11 includes a first round block 20 and a second round block 21, a mounting hole 22 is coaxially formed on the upper surface of the partition board 9, the first round block 20 is screwed on the inner wall of the mounting hole 22, a mounting groove 23 is formed on the bottom surface of the second round block 21, a vertical groove 24 and a horizontal groove 25 are formed on the inner wall of the mounting groove 23, the vertical groove 24 is communicated with the bottom surface of the second round block 21, the horizontal groove 25 is located at the upper end of the vertical groove 24, the horizontal groove 25 is communicated with the vertical groove 24, the vertical groove 24 is perpendicular to the horizontal groove 25, a convex block 26 is fixed on the outer wall of the upper end of the first round block 20, the convex block 26 slides in the vertical groove 24, and the convex block 26 slides in the.

Referring to fig. 4 and 5, the diameter of the second round block 21 is equal to the diameter of the shaft of the dispersion wheel, and for dispersion wheels with different shaft diameters, rubber coating pieces with different shaft diameters need to be poured, so that before pouring, the second round block 21 is replaced according to the shaft diameter of a product, the lug 26 is enabled to slide into the inner cavity of the vertical groove 24 from the lower end opening of the vertical groove 24 in advance, when the lug 26 slides to the upper end of the vertical groove 24, the second round block 21 is rotated, the lug 26 slides into the inner cavity of the transverse groove 25, and therefore the second round block 21 is difficult to separate from the first round block 20.

The implementation principle of a polyurethane rubber-coated part casting mold in the embodiment of the application is as follows: in the pouring process, a proper second round block 21 is selected in advance according to the shaft diameter of the polyurethane dispersing wheel, then the second round block 21 is fixed on the first round block 20, the first round block 20 is fixed on the partition plate 9, then the partition plate 9 is fixed at the upper end of the inner mold 8, the inner mold 8 is fixed on the base 1 in a threaded connection mode, then the outer mold 2 is sleeved, the outer mold 2 is fixed on the upper surface of the base 1, finally the upper cover 3 is covered, after the assembly is completed, the molten polyurethane viscous liquid is poured into a cavity between the inner mold 8 and the outer mold 2 from the material guide pipe 5, after one end of the assembly is cooled, the upper cover 3 and the outer mold 2 are detached, and the cooled and formed polyurethane rubber-coated part is taken out.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a polyurethane rubber-coated part casting mold, includes base (1), its characterized in that: an outer mold (2) is detachably connected on the base (1), the upper end of the outer mold (2) is detachably connected with an upper cover (3), a pouring port (4) communicated with the inner cavity of the upper cover (3) is arranged on the upper surface of the upper cover, a material guide pipe (5) is coaxially fixed on the inner wall of the pouring gate (4), a plurality of first insert blocks (6) are uniformly fixed on the upper surface of the upper cover (3) at intervals around the circumference thereof, a second insert (7) is fixed on the inner wall of the outer die (2), an inner die (8) is arranged in the inner cavity of the outer die (2), the inner die (8) is fixed on the upper surface of the base (1), a partition plate (9) is fixed at the upper end of the inner die (8), a plurality of third inserts (10) are fixed on the upper surface of the clapboard (9) at intervals around the circumference, and a positioning column (11) is coaxially fixed on the upper surface of the partition plate (9).

2. The pouring mold for polyurethane overcast members according to claim 1, wherein: seted up first annular (12) on the upper surface of base (1), the outer wall of first annular (12) intercommunication base (1), be fixed with annular bulge (13) on the upper surface of first annular (12), second annular (14) have been seted up on the lower extreme outer wall of external mold (2), the bottom surface of second annular (14) intercommunication external mold (2), external mold (2) inlay the inner chamber of establishing at first annular (12), annular bulge (13) inlay the inner chamber of establishing at second annular (14), external mold (2) and base (1) are through hexagon socket head cap screw fixed connection.

3. The pouring mold for polyurethane overcast members according to claim 1, wherein: third annular (15) have been seted up on the upper surface of base (1), all seted up the internal thread on the both sides inner wall of third annular (15), two internal screw threads revolve to the same, the external screw thread has all been seted up on the lower extreme both sides outer wall of centre form (8), centre form (8) threaded connection is on the inner wall of third annular (15).

4. The pouring mold for polyurethane overcast members according to claim 1, wherein: the upper surface of centre form (8) has been seted up fourth annular (16), the inner wall of centre form (8) is communicate in fourth annular (16), the lower surface laminating of baffle (9) is on the inner wall bottom surface of fourth annular (16), baffle (9) are through hexagon socket head cap screw fixed connection.

5. The pouring mold for polyurethane overcast members according to claim 1, wherein: fifth annular (17) have been seted up on the up end of external mold (2), fifth annular (17) intercommunication external mold (2) inner wall, the bottom surface laminating of upper cover (3) is on the inner wall bottom surface of fifth annular (17), upper cover (3) are through hexagon socket head cap screw fixed connection in the upper end of external mold (2).

6. The pouring mold for polyurethane overcast members according to claim 1, wherein: a plurality of first air holes (18) are uniformly formed in the outer wall of the inner die (8) at intervals along the circumferential direction of the inner die, the aperture of each first air hole (18) is smaller than three millimeters, and second air holes (19) are formed in the upper surface of the base (1) in a penetrating mode.

7. The pouring mold for polyurethane overcast members according to claim 1, wherein: reference column (11) include first circle piece (20) and second circle piece (21), mounting hole (22) have been seted up to the coaxial on the upper surface of baffle (9), first circle piece (20) threaded connection is on the inner wall of mounting hole (22), mounting groove (23) have been seted up on the bottom surface of second circle piece (21), erect groove (24) and cross slot (25) have been seted up on the inner wall of mounting groove (23), erect groove (24) and cross slot (25) intercommunication, be fixed with lug (26) on the outer wall of first circle piece (20), lug (26) slide in erecting groove (24) and cross slot (25).

8. The pouring mold for polyurethane overcladding member as recited in claim 2, wherein: be provided with sealed pad (27) in the inner chamber of first annular (12), sealed pad (27) are the zigzag, the laminating of the one end of sealed pad (27) is on the upper surface of annular arch (13), the laminating of the other end of sealed pad (27) is on the inner wall bottom surface of first annular (12).