CN214219225U - Paper sprue pipe shaping die for casting - Google Patents

Abstract

The utility model discloses a paper watering pipe plastic mould is used in casting, including last mould, lower mould, the one side that goes up mould, lower mould are relative is equipped with the arc concave surface, at the equal fixedly connected with heat insulating board in the end of last mould, lower mould, goes up mould and lower mould compound die and forms one end and seals other end open-ended lumen by the heat insulating board, is equipped with along arc concave surface length direction's vertical air discharge duct in last mould arc concave surface both sides edge, is equipped with many on the lower mould with last mould butt joint on the face and horizontal air discharge duct that feeds through and extend to the mould outside with vertical air discharge duct. The utility model discloses simple structure, the plastic is efficient, and long service life has solved among the prior art terminal and the easy cracked problem of metal external mold laminating of gasbag, has solved simultaneously because the difficult discharge of vapor makes the plastic time increase, reduces production efficiency's drawback.

Description

Paper sprue pipe shaping die for casting

Technical Field

The utility model relates to a paper watering pipe plastic mould is used in casting.

Background

The paper runner pipe utilizes renewable resources, has the advantages of no calcination, energy conservation, convenient use, less dust during cutting, light weight, difficult damage and the like, and is easy to break, peel and clean after high temperature; hard solid waste is less after casting, environmental pollution and abrasion of sand regeneration equipment can be reduced, the quality of regenerated sand can be improved, and the rejection rate of castings is reduced; especially, the weight of the paper runner pipe is only one tenth of that of the ceramic runner pipe; the primary pulp sprue pipe is an ideal substitute product of the ceramic sprue pipe; however, after the paper runner pipe is formed and aired, the deformation is large and irregular, and the inner wall surface is rough, so that the flowability of the casting material is seriously hindered; meanwhile, the paper runner pipe cannot be tightly attached when being inserted and combined for use, and sand is easy to leak, so that a casting is scrapped. The product is required to be shaped, but in the prior art, the product is fixed in a mould by adopting a metal external mould with an opening at one end after the mould is closed, an air bag with expansibility is arranged in a paper runner pipe, then compressed gas is filled in the air bag to extrude the product, and meanwhile, the metal external mould is heated to achieve the shaping purpose; the defect that the tail end of the air bag is adhered to a high-temperature metal outer mold in the process of inflation, so that the air bag is easy to break, the service life of the air bag is greatly shortened, and the shaping cost is increased; meanwhile, water vapor generated by the product under the action of the high-temperature metal outer die is not easy to discharge, the shaping time is prolonged, and the shaping efficiency is reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a shaping mould for casting paper pouring pipe, which has simple structure, high shaping efficiency and long service life; the problem of among the prior art gasbag end and the laminating of metal external mold easy fracture is solved, the drawback that makes the plastic time increase, reduction in production efficiency because the difficult discharge of vapor has been solved simultaneously.

The utility model adopts the technical scheme as follows: the utility model provides a paper runner pipe plastic mould for casting, includes mould, lower mould, the one side that goes up mould, lower mould relative is equipped with the arc concave surface, at the equal fixedly connected with heat insulating board in end of last mould, lower mould, goes up the mould and lower mould compound die and forms one end and seals other end open-ended lumen by the heat insulating board, is equipped with the vertical air discharge duct along arc concave surface length direction in last mould arc concave surface both sides edge, is equipped with many on the lower mould with last mould butt joint on the face with the horizontal air discharge duct that the air discharge duct intercommunication just extended to the mould outside.

Furthermore, the heat insulation plate is made of materials with high temperature resistance and low heat conductivity coefficient.

Furthermore, screw holes are formed in the tail ends of the upper die and the lower die and in corresponding positions on the heat insulation plate, and the heat insulation plate is fixedly connected with the upper die and the lower die through screws.

Furthermore, the width of the longitudinal exhaust groove is 2-6 mm, and the depth is 0.3-0.8 mm.

Further, the transverse exhaust grooves are provided with 3-5 strips at intervals, the distance is 50-100 mm, the width is 3-8 mm, and the depth is 0.3-0.8 mm.

The utility model relates to a paper watering pipe plastic mould is used in casting, edge through having the arc concave surface sets up vertical air discharge duct, horizontal air discharge duct, solved because the difficult discharge of vapor makes the plastic time increase, reduce production efficiency's drawback, through last mould, the end of lower mould sets up high temperature resistant, the heat insulating board that coefficient of heat conductivity is low, the problem of gasbag end and the easy cracked of metal external mold laminating among the prior art has been solved, its overall structure is simple, the cost of manufacture is low, production efficiency is improved, simultaneously greatly increased the life of plastic gasbag.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the upper die of the present invention.

Fig. 3 is a schematic structural view of the lower mold of the present invention.

Fig. 4 is a schematic structural view of the heat insulation board of the present invention.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

As shown in fig. 1-4, the shaping mold for the paper pouring channel pipe for casting of this embodiment includes an upper mold 1, a lower mold 2, and two heat insulation plates 3, a first arc concave surface 11 is disposed on the upper mold 1, a second arc concave surface 21 is disposed on the lower mold 2, 3 first screw holes 13 are disposed on the end surface of the upper mold 1, 3 second screw holes 23 are disposed on the end surface of the lower mold 2, 3 via holes 31 are disposed on the heat insulation plates 3, the two heat insulation plates 3 are respectively fixed at the ends of the upper mold 1 and the lower mold 2 by screws, one end of the first arc concave surface 11 and one end of the second arc concave surface 21 are closed, and the upper mold 1 and the lower mold 2 are assembled to form a pipe cavity 4 with one end closed by the heat insulation plate 3 and the other end open. The heat insulation board 3 is made of high temperature resistant material with low heat conductivity coefficient, such as bakelite.

The edges of two sides of the first arc-shaped concave surface 11 of the upper die 1 are provided with a longitudinal exhaust groove 12 along the length direction of the first arc-shaped concave surface 11, the width of the longitudinal exhaust groove is 3mm, and the depth of the longitudinal exhaust groove is 0.5 mm. 4 transverse exhaust grooves 22 which are communicated with the longitudinal exhaust grooves 12 and extend to the outer side of the mold are respectively arranged on the surface, butted with the upper mold 1, of the lower mold 2, the width of each transverse exhaust groove 22 is 5mm, the depth of each transverse exhaust groove 22 is 0.5mm, and the distance between every two adjacent transverse exhaust grooves 22 is 70 mm.

In the shaping process, the heat insulation plate 3 is fixedly fastened on the end surfaces of the upper die 1 and the lower die 2 respectively, and at the moment, the upper die 1 and the lower die 2 are closed to form a tube cavity 4 with one end closed by the heat insulation plate 3 and the other end opened; placing a wet blank body 5 of the paper runner pipe in a pipe cavity 4, placing an air bag 6 in the wet blank body 5 of the paper runner pipe, simultaneously heating an upper die 1 and a lower die 2 to 220 ℃, introducing compressed gas into the air bag 6, expanding and extruding the wall of the wet blank body of the paper runner pipe 5 by the air bag 6 at the moment, and generating steam under the action of high temperature; the water vapor can be rapidly discharged through the longitudinal exhaust grooves 12 and the transverse exhaust grooves 22, so that the product can rapidly reach the drying and shaping state, the shaping time is reduced, and the production efficiency is improved. And when 6 expand to 4 blind ends of lumen, 6 laminating of gasbag have avoided because 6 direct contact high temperature metal mold of gasbag drawback easy broken on microthermal heat insulating board 3, have reduced the frequency that the gasbag was changed, have improved production efficiency, greatly increased the life of plastic gasbag simultaneously.

Many modifications and other embodiments of the invention will come to mind to one skilled in the art to which this invention pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (5)

1. The utility model provides a paper runner pipe plastic mould for casting, includes mould, lower mould, the one side that goes up mould, lower mould relative is equipped with arc concave surface, its characterized in that: the end of the upper die and the end of the lower die are fixedly connected with heat insulation plates, the upper die and the lower die are assembled to form a tube cavity with one end closed by the heat insulation plates and the other end opened, longitudinal exhaust grooves along the length direction of the arc-shaped concave surface are formed in the edges of the two sides of the arc-shaped concave surface of the upper die, and a plurality of transverse exhaust grooves which are communicated with the longitudinal exhaust grooves and extend to the outer side of the die are formed in the surface of the lower die, which is in butt joint with the upper die.

2. The mold for shaping a cast paper sprue pipe according to claim 1, wherein: the heat insulation plate is made of materials with high temperature resistance and low heat conductivity coefficient.

3. The mold for shaping a cast paper sprue pipe according to claim 1, wherein: screw holes are formed in the tail ends of the upper die and the lower die and in corresponding positions on the heat insulation plate, and the heat insulation plate is fixedly connected with the upper die and the lower die through screws.

4. The mold for shaping a cast paper sprue pipe according to claim 1, wherein: the width of the longitudinal exhaust groove is 2-6 mm, and the depth is 0.3-0.8 mm.

5. The mold for shaping a cast paper sprue pipe according to claim 1, wherein: the horizontal air discharge duct is provided with 3 ~ 5 at intervals, and the interval is 50 ~ 100mm, and the width is 3 ~ 8mm, and the degree of depth is 0.3 ~ 0.8 mm.

Images