CN212498644U

CN212498644U - Foaming mold

Info

Publication number: CN212498644U
Application number: CN202020571930.3U
Authority: CN
Inventors: 陆李勇; 杨杉苗; 朱海红; 程美
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-02-09
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a foaming mould, which comprises an upper mould and a lower mould, wherein a foaming cavity is arranged between the upper mould and the lower mould, at least two annular edge sealing assemblies are arranged between the upper mould and the lower mould from inside to outside along the radial direction, and the edge sealing assemblies are positioned at the circumferential edge of the foaming cavity; a buffer cavity is formed between the adjacent edge sealing components, and an exhaust channel communicated with the buffer cavity is arranged on the edge sealing component close to one side of the foaming cavity. The utility model discloses a foaming mold utensil, simple structure, and can not cause raw and other materials to overflow to the mould outside when the foaming chamber is carminative, save raw and other materials.

Description

Foaming mold

Technical Field

The utility model belongs to the technical field of the mould processing technique and specifically relates to a foaming mould.

Background

The mould for foaming is a plastic foaming mould. Foaming mold, namely foaming mold, directly filling foaming resin into the mold, heating and melting the foaming resin to form a gas-liquid saturated solution, forming a large number of micro bubble nuclei through nucleation, and growing the bubble nuclei to prepare the foam plastic part. Three common foaming methods are physical foaming, chemical foaming and mechanical foaming.

In the plastic foaming process, gas exists in the foaming cavity, if the gas in the cavity cannot be discharged in time, the quality of a foaming molding product is directly influenced, and a cavity can appear in the middle of the product. However, in the existing foaming mold, a sealing mechanism is arranged on the lower mold, and an exhaust hole is formed in the sealing mechanism, so that after the sealing mechanism is arranged, plastic foaming needs to be exhausted, an exhaust groove needs to be formed in a material sealing position, molten raw materials can flow to the material sealing position, the raw materials can leak to the four sides of the mold from the exhaust groove, and raw materials are wasted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects of the prior art, the foaming mold is simple in structure, raw materials cannot overflow to the outside of the mold when the foaming cavity exhausts, and the raw materials are saved.

The utility model adopts the technical proposal that: providing a foaming mold, which comprises an upper mold and a lower mold, wherein a foaming cavity is arranged between the upper mold and the lower mold, at least two annular edge sealing assemblies are arranged between the upper mold and the lower mold from inside to outside along the radial direction, and the edge sealing assemblies are positioned at the circumferential edge of the foaming cavity; a buffer cavity is formed between the adjacent edge sealing components, and an exhaust channel communicated with the buffer cavity is arranged on the edge sealing component close to one side of the foaming cavity.

Compared with the prior art, the utility model has the following advantage:

the utility model discloses a foaming mould sets up at least twice banding subassembly between upper die and lower mould for seal off the plastics raw and other materials of molten state, and in every two adjacent banding subassemblies certain distance of interval in order to form corresponding cushion chamber, once first way banding subassembly does not seal off the raw materials, then second way banding subassembly can realize further seal off the effect; and be equipped with the exhaust passage with the cushion chamber intercommunication on the banding subassembly of the inboard that is close to the foaming chamber, when the foaming chamber needs to exhaust, the gas in the foaming chamber enters into the cushion chamber, has partial raw materials to spill over when exhausting, and the raw and other materials that spill over also enter into the cushion chamber along with gas together, and can not directly spill over to the mould outside, cause raw and other materials extravagant.

Furthermore, two sealing edge assemblies which are arranged at intervals are arranged between the upper die and the lower die along the radial direction from inside to outside. The space between the two edge sealing assemblies forms a buffer cavity.

As an improvement, the radial distance S between the two edge sealing assemblies is more than or equal to 8 mm.

Preferably, the edge sealing assembly comprises an annular bump arranged on the outer edge of the lower die along the circumferential direction. Corresponding annular bulges are directly arranged on the lower die, so that the edge sealing effect is realized, the structure is simple, and the processing cost is low.

Preferably, the annular bump is integrally formed on the lower die. Annular lug and lower mould formula structure as an organic whole, processing is convenient, directly on the lower mould machine-shaping can, need not other connection step, reduce cost.

Preferably, the height H of the annular bump is 0.5-0.6 times of the distance H between the outer edges of the upper die and the lower die.

Still preferably, the width W of the annular projection is 3-4 mm.

As an improvement, the exhaust channel comprises a plurality of through holes which are circumferentially arranged at the bottoms of the annular convex blocks close to one end of the foaming cavity, and two ends of each through hole are respectively communicated to the foaming cavity and the buffer cavity.

Drawings

Fig. 1 is a schematic structural view of the foaming mold of the present invention.

Fig. 2 is a sectional view of the foaming mold of the present invention.

Fig. 3 is an enlarged structural view at X in fig. 2.

Fig. 4 is an enlarged structural view at Y in fig. 3.

Wherein, 1-upper die, 2-lower die, 3-foaming cavity, 4-annular bump, and 5-buffer cavity.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

In the description of the present invention, it should be noted that the terms "upper and lower", "inside and outside", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the utility model provides a foaming mold, which comprises an upper mold 1 and a lower mold 2, a foaming cavity 3 is arranged between the upper mold 1 and the lower mold 2, at least two annular edge sealing assemblies are arranged between the upper mold 1 and the lower mold 2 from inside to outside along the radial direction, and the edge sealing assemblies are positioned at the circumferential edge of the foaming cavity 3; a buffer cavity 5 is formed between the adjacent edge sealing components, and an exhaust channel communicated with the buffer cavity 5 is arranged on the edge sealing component on one side close to the foaming cavity 3.

In the embodiment, two sealing edge assemblies are arranged between the upper die 1 and the lower die 2 at intervals along the radial direction from inside to outside; and the radial distance S between the two edge sealing assemblies is more than or equal to 8mm, so that the space of the buffer cavity 5 is enough to accommodate the gas discharge of the foaming cavity 3 and the overflow of part of raw materials.

In this embodiment, as shown in fig. 3 and 4, the edge banding assembly in this structure includes an annular protrusion 4 circumferentially disposed on the outer edge of the lower mold, that is, two annular protruding structures are formed at the upper end of the circumferential edge of the lower mold 2, and a certain distance is left between the two protruding structures to form the buffer cavity. More specifically, the annular projection 4 is integrally formed on the lower die 2. Of course, in other embodiments, the annular protrusion 4 may be fixed on the lower mold 2 by other connection methods, such as: bonding, welding, etc.

The height H of the annular bump 4 is 0.5-0.6 times of the outer edge distance H between the upper die 1 and the lower die 2. In this embodiment, specifically, the interval H between the outer edges of the upper die 1 and the lower die 2 is 2mm, and the height H of the annular projection 4 is 1.1 mm. And, the width W of annular lug 4 is 3-4mm, and more preferably, the width W of annular lug 4 is 3mm, and the maximum realization is sealed the material effect.

Specifically, the exhaust passage comprises a plurality of through holes which are circumferentially arranged at the bottom of the annular convex block 4 close to one end of the foaming cavity 3, and two ends of each through hole are respectively communicated to the foaming cavity 3 and the buffer cavity 5. Foaming mould in this application is used in the PU foaming time, because the PU foaming needs the exhaust, opens the exhaust groove at first way banding structurally, and the exhaust groove is not opened to the second way banding structurally. Therefore, when the foaming cavity 3 needs to be exhausted, exhausted gas and part of leaked PU material are exhausted in the buffer cavity 5 between the two edge sealing assemblies, the PU material does not leak from four sides of the die, and the amount of the leaked PU material is reduced.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a foaming mold utensil, includes mould (1) and lower mould (2), last mould (1) and lower mould (2) between be equipped with foaming chamber (3), its characterized in that: at least two annular edge sealing assemblies are arranged between the upper die (1) and the lower die (2) from inside to outside along the radial direction, and the edge sealing assemblies are positioned on the circumferential edge of the foaming cavity (3); a buffer cavity (5) is formed between the adjacent edge sealing components, and an exhaust channel communicated with the buffer cavity (5) is arranged on the edge sealing component at one side close to the foaming cavity (3).

2. Foaming die according to claim 1, characterized in that: and two sealing edge assemblies arranged at intervals are arranged between the upper die (1) and the lower die (2) along the radial direction from inside to outside.

3. Foaming die according to claim 2, characterized in that: the radial distance S between the two edge sealing assemblies is more than or equal to 8 mm.

4. Foaming die according to any of claims 1 to 3, characterized in that: the edge sealing component comprises an annular convex block (4) which is arranged on the outer edge of the lower die along the circumferential direction.

5. Foaming die according to claim 4, characterized in that: the annular convex block (4) is integrally formed on the lower die (2).

6. Foaming die according to claim 4, characterized in that: the height H of the annular bump (4) is 0.5-0.6 times of the distance H between the outer edges of the upper die (1) and the lower die (2).

7. Foaming die according to claim 4, characterized in that: the width W of the annular bump (4) is 3-4 mm.

8. Foaming die according to claim 4, characterized in that: the exhaust channel comprises a plurality of through holes which are circumferentially arranged at the bottoms of the annular convex blocks (4) close to one end of the foaming cavity (3), and two ends of each through hole are respectively communicated to the foaming cavity (3) and the buffer cavity (5).