CN218700729U - Supercritical jet foaming injection molding equipment - Google Patents

Abstract

The utility model discloses supercritical jets out injection moulding equipment of foaming, it mainly lies in that each forming die has the upper and lower mould that is relative setting respectively to and a bottom plate that supplies this lower mould to set up, and should go up the mould both sides and all be equipped with a locating part, in addition, just correspond on this bottom plate locating part department is equipped with buckle spare, makes upper and lower mould just be located between the buckle spare, consequently, borrow by buckle spare tightly supports to press the knot the locating part to with should upper and lower mould stable fixation be located this bottom plate, ensure simultaneously that upper and lower mould is inseparable enclosed state, so that supercritical jets out the forming process of foaming, outwards spills over's defect when effectively avoiding the fluid that jets out and annotating the material, and then effectively promotes the shaping yield of product.

Description

Supercritical jet foaming injection molding equipment

Technical Field

The present invention relates to an injection molding apparatus, and more particularly to an injection molding apparatus for supercritical injection foaming.

Background

The supercritical ejection foaming technology is to mix a supercritical fluid and a polymer phase, convert the supercritical fluid into a gaseous state by the change of temperature and pressure, thereby expanding the volume of the polymer, and then cool and set the polymer, wherein the used supercritical fluid has the characteristics of high mass transfer efficiency, low surface tension, adjustable solubility along with the temperature and pressure, and the like, so that the supercritical fluid is favored by the industry.

Referring to fig. 1, a conventional injection molding apparatus 1 includes a moving device 11, a plurality of molding dies 12 disposed on the moving device 11, an injection device 13 disposed on one side of the moving device 11, and an air inlet and exhaust device 14 disposed on the injection device 13, wherein the air inlet and exhaust device 14 includes a plurality of joints 141, each molding die 12 includes a bottom plate 121, a lower die 122 disposed on the bottom plate 121, an upper die 123 disposed corresponding to the lower die 122, and a plurality of through holes 124 disposed on the upper die 123 and opposite to the plurality of joints 141, and the upper die 123 and the lower die 122 are in a tightly closed state, when the injection molding apparatus 1 is in use, the moving device 11 will displace to drive the molding dies 12 to displace and stay at the relative positions of the injection device 13 and the air inlet and exhaust device 14, so that the joints 141 of the air inlet and exhaust device 14 are connected to the through holes 124 of a molding die 12, and the supercritical fluid and the injection material are sequentially injected into the molding dies 12, and then the foaming molding object is achieved by the temperature and pressure changes.

However, after practical use, it is found that good sealing performance cannot be achieved by mutually clamping and fixing the upper mold 123 and the lower mold 122, that is, the sealing performance is not good due to the fact that the upper mold 123 and the lower mold 122 cannot be tightly closed, which not only easily causes the supercritical fluid to be discharged after injection, but also cannot effectively control the foaming effect of the injection material, and in addition, when the injection device 13 injects the injection material into the forming mold 12, since the supercritical fluid forms a pressure effect on the injection material while injecting the injection material, but also easily causes a part of the injection material to be discharged from the joint between the upper mold 123 and the lower mold 122 due to the pressure effect, the produced finished product must be subjected to an additional processing procedure to cut off the excess material generated at the edge of the finished product, which not only wastes time and labor, but also increases the cost, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

Therefore, the present invention provides an injection molding apparatus for supercritical injection foaming, which can stabilize and position a molding mold, ensure that the molding mold is tightly sealed, and effectively avoid the supercritical fluid or the injection material from overflowing outwards, thereby improving the molding yield of the product.

Therefore, the utility model provides an ejection forming device of supercritical ejection foaming, which comprises a moving device, a plurality of forming dies arranged on the moving device, an ejection device arranged on one side of the moving device, and an air inlet and exhaust device arranged on the ejection device, wherein, the air inlet and exhaust device comprises a plurality of joints, each forming die comprises a bottom plate, a lower die arranged on the bottom plate, an upper die arranged corresponding to the lower die, and a plurality of through holes arranged on the upper die and arranged opposite to the plurality of joints, the moving device drives the forming dies to move in turn and stay at the relative position of the ejection device and the air inlet and exhaust device for material injection operation; the upper die and the lower die are fixedly arranged on the bottom plate so as to ensure that the upper die and the lower die are in a tight closed state.

Furthermore, each fastener comprises a body arranged on the bottom plate and a hook unit pivoted on the body.

After adopting above-mentioned technical scheme, can borrow by the buckle spare tightly to press the knot locating part, and then with upper and lower mould stable fixed be located this bottom plate, ensure simultaneously that upper and lower mould is inseparable encapsulated situation to in the forming process of supercritical ejection of foam, effectively avoid supercritical fluid or annotate the material and outwards spill over, ensure the shaping yield of product more.

Drawings

FIG. 1 is a schematic view of a conventional injection molding apparatus;

FIG. 2 is a schematic view of a preferred embodiment of the present invention;

FIG. 3 is a partial exploded view of the preferred embodiment;

fig. 4 is an assembled view of fig. 3.

Description of the symbols:

(conventional)

1: injection molding apparatus

11: mobile device

12: forming die

13: injection device

14: air inlet and outlet device

121: base plate

122: lower die

123: upper die

124: through-hole

141: joint

(this creation)

3: injection molding apparatus

31: mobile device

32: forming die

33: injection device

34: air inlet and outlet device

321: base plate

322: lower die

323: upper die

324: through hole

325: position limiting piece

326: fastener

341: joint

3261: body

3262: a hooking unit.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of preferred embodiments of the invention when read in conjunction with the accompanying drawings.

Referring to fig. 2, in a preferred embodiment of the present invention, the injection molding apparatus 3 for supercritical injection foaming comprises a moving device 31, a plurality of molding dies 32 disposed on the moving device 31, an injection device 33 disposed on one side of the moving device 31, and an air inlet and outlet device 34 disposed on the injection device 33, wherein the air inlet and outlet device 34 comprises a plurality of joints 341, as shown in fig. 3, each molding die 32 comprises a bottom plate 321, a lower mold 322 disposed on the bottom plate 321, an upper mold 323 disposed corresponding to the lower mold 322, and a plurality of through holes 324 disposed on the upper mold 323 and corresponding to the joints 341, and the upper mold 323 and the lower mold 322 are in a tightly closed state, and each upper mold 323 is provided with a limiting member 325 on both sides thereof, and a fastening member 326 is disposed on the bottom plate 321 and corresponding to the limiting member 325, so that the upper mold 323 and the lower mold 322 are located between the fastening members, so as to fasten the limiting member 326 against the limiting member 325, so that the upper mold 323 and the lower mold 322 are tightly closed, and the fastening member 3261 comprises a hook body 3261 and a hook body 3261 disposed on the bottom plate 33.

Referring to fig. 3 and 4, when the injection molding apparatus 3 is in use, the hooking unit 3262 of each of the fastening elements 326 is pressed against the limiting element 325, so that the upper mold 323 is pressed by the hooking unit 3262 to be tightly closed with the lower mold 322, the air inlet and outlet device 34 is further connected to a gas supply source (not shown), when the moving device 31 drives the molding mold 32 to alternately displace and stay at the relative position of the injection device 33 and the air inlet and outlet device 34, the connector 341 of the air inlet and outlet device 34 is connected to the through hole 324 of a molding mold 32, and the supercritical fluid is injected into the molding mold 32 through the connector 341 and the through hole 324 by the gas supply source, after the supercritical fluid fills the molding mold 32, the supply of the supercritical fluid is stopped, and then the injection material is injected into the molding mold 32 through the connector 341 and the through hole 324 in cooperation with the injection device 33, so that the injection material is further mixed with the supercritical fluid, and then is fixed, and the temperature of the supercritical fluid is reduced, so that the injection material is stably injected into the molding mold 322, the upper mold 322, and the lower mold 322 is tightly pressed against the limiting element 323, so that the foaming molding process is effectively prevented from the foaming element 322, and the foaming material is effectively prevented from overflowing from the upper mold 322, therefore, the processing procedure is simplified, the operation efficiency is improved, the overall cost is reduced, and the forming yield of the product is greatly improved.

Concluding up the aforesaid, the utility model discloses supercritical fluid jets out foaming's injection moulding equipment, it borrows this last mould both sides to be equipped with the locating part, this bottom plate is equipped with buckle spare for locating part department simultaneously, and this upper and lower mould just locates between the buckle spare, so that borrow and tightly support the pressure to detain the locating part downwards by buckle spare, and then apply the effort of pushing down to this last mould, more be favorable to guaranteeing that this upper and lower mould keeps good encapsulated situation, avoid this supercritical fluid or this notes material to spill over outward simultaneously, and then avoid the production of clout, effectively simplify the procedure, save the activity duration, reduce the expenditure of overall cost, and ensure the shaping yield of product.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and should not be taken as limiting the scope of the present invention, i.e., all the equivalent changes and modifications made in the claims and the specification should be included in the scope of the present invention.

Claims (2)

1. An injection molding device for supercritical injection foaming comprises a moving device, a plurality of molding dies arranged on the moving device, an injection device arranged on one side of the moving device, and an air inlet and exhaust device arranged on the injection device, wherein the air inlet and exhaust device comprises a plurality of joints, each molding die is provided with a bottom plate, a lower die arranged on the bottom plate, an upper die arranged corresponding to the lower die, and a plurality of through holes arranged on the upper die and opposite to the joints, and the moving device drives the molding dies to displace in turn and stop at the opposite positions of the injection device and the air inlet and exhaust device for material injection operation; the method is characterized in that:

the upper die and the lower die are fixedly arranged on the bottom plate so as to ensure that the upper die and the lower die are in a tight closed state.

2. The injection molding apparatus for supercritical injection foaming according to claim 1, wherein: each fastener comprises a body arranged on the bottom plate and a hook unit pivoted on the body.

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