CN213767113U

CN213767113U - Extrusion forming die for producing air pipe flange heat-insulation waistband

Info

Publication number: CN213767113U
Application number: CN202022214711.2U
Authority: CN
Inventors: 黄胜权
Original assignee: Guangzhou Laile Rubber Co ltd
Current assignee: Guangzhou Laile Rubber Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-07-23
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to an extrusion molding die for producing a blast pipe flange heat-insulating waistband, which comprises an outer die and an inner die, wherein a molding cavity is formed between the outer wall of the inner die and the inner wall of the outer die, a plurality of convex strips which are longitudinally distributed on the outer wall of the inner die or on the inner wall of the outer die are arranged in the molding cavity, and a plurality of grooves are formed on the inner wall or the outer wall of a product which is extruded and molded in the molding cavity through the convex strips; and a partition strip is arranged between any two adjacent raised strips and is parallel to the raised strips. Solves the technical problems of complex slitting process, high slitting difficulty and difficult size precision control in the existing production of the heat-insulating waistband.

Description

Extrusion forming die for producing air pipe flange heat-insulation waistband

Technical Field

The utility model belongs to the technical field of the mould and specifically relates to an extrusion moulding mould that production tuber pipe flange heat preservation waistband was used is related to.

Background

The common material for air pipe heat preservation of the central air conditioner is flexible rubber-plastic foam board, common flange air pipes are adopted along with the increasing use of air pipes, when two air pipes are connected, the heat preservation difficulty of the flange part is greatly increased due to the protrusion of the flange, and during construction, a heat preservation waistband (as shown in figure 1) with the width of 16-20 mm and proper length and thickness is adopted to surround the flange and bond the flange with glue. When the existing heat preservation waistband is produced, an extruder is generally used for extrusion molding, an outer mold and an inner mold which are both cylindrical are used, a molding cavity is arranged between the outer mold and the inner mold, rubber materials are extruded through the molding cavity to form a cylindrical product with smooth inner and outer surfaces, the cylindrical product is cut and subjected to high-temperature foaming to form a rubber-plastic foamed plate, and the flat rubber-plastic foamed plate is longitudinally cut to form the strip-shaped heat preservation waistband (as shown in fig. 1).

When the rubber and plastic foam board is cut into strips, the whole rubber and plastic foam board needs to be strictly positioned and then cut by using an accurate cutting tool, so that the rubber and plastic foam board can be cut into a plurality of heat-insulation waistbands with qualified dimension specifications. Therefore, the existing production of the heat-insulating waistband has the technical problems of complex slitting process, high slitting difficulty and difficult control of dimensional precision.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide an extrusion moulding mould that production tuber pipe flange heat preservation waistband was used, solve current heat preservation waistband production and exist cut the technology complicacy, cut the degree of difficulty height, the difficult technical problem of size precision control.

The purpose of the utility model is realized through the following technical scheme:

an extrusion molding die for producing a flange heat-insulation waistband of an air pipe comprises an outer die and an inner die, wherein a molding cavity is formed between the outer wall of the inner die and the inner wall of the outer die, a plurality of convex strips longitudinally distributed on the outer wall of the inner die or on the inner wall of the outer die are arranged in the molding cavity, and a plurality of grooves are formed on the inner wall or the outer wall of a product extruded and molded in the molding cavity through the convex strips; and a partition strip is arranged between any two adjacent raised strips and is parallel to the raised strips.

Furthermore, the outer die and the inner die are both cylindrical, the central axes of the outer die and the inner die are overlapped, and the raised lines and the separation strips are uniformly distributed on the outer wall of the inner die or the inner wall of the outer die in the circumferential direction around the central axis.

Furthermore, the sand grip is an inverted trapezoid, and the width of the groove bottom surface of the groove formed on the inner wall or the outer wall of the product formed by extrusion in the forming cavity is larger than the width of the groove top surface through the sand grip.

Furthermore, the raised lines and the separating strips are uniformly distributed on the outer wall of the inner die, the raised lines, the separating strips and the inner die are integrated, and a certain gap is reserved between the separating strips and the outer die.

Furthermore, the raised lines and the separating strips are uniformly distributed on the inner wall of the outer die, the raised lines, the separating strips and the outer die are integrated, and a certain gap is reserved between the separating strips and the inner die.

The utility model discloses following beneficial effect has: the utility model provides an extrusion moulding mould that production tuber pipe flange heat preservation waistband was used utilizes the product that this mould produced, can be formed with many recesses on the inner wall of this product or outer wall, can form the rubber and plastic foaming panel that one side has many recesses after splitting this product, can form many strips notched heat preservation waistband after cutting this rubber and plastic foaming panel again. Utilize this heat preservation waistband parcel wind pipe's flange position, the bulge of flange can be embedded into in the recess to this can avoid remaining in flange both sides and having very big space and form the cold bridge, and the parcel back tuber pipe surface is level and smooth pleasing to the eye. On the other hand, be equipped with a parting bead between two adjacent sand grips, then can be formed with a grooving on the rubber and plastic foaming panel after the extrusion, the grooving that forms on aiming at rubber and plastic foaming panel with the cutter after the shaping carries out simple cutting, can realize being cut into the heat preservation waistband of a strip size standard with rubber and plastic foaming panel branch, consequently, by the utility model discloses a required device of cutting is simple cut to mould extrusion's rubber and plastic foaming panel, when guaranteeing the size precision of cutting, greatly reduced cuts the degree of difficulty.

Drawings

FIG. 1 is a schematic structural view of a heat-insulating waistband in the prior art;

FIG. 2 is a schematic view of the extrusion molding die of example 1;

FIG. 3 is a schematic view of the extrusion molding die of example 2;

fig. 4 is a schematic view of a partial structure of the rubber-plastic foamed sheet manufactured by the extrusion molding die of the present invention;

FIG. 5 is a schematic view of a partial structure of a heat-insulating waistband manufactured by the extrusion molding die of the present invention;

fig. 6 is a schematic sectional view of the heat preservation waistband wrapped on the flange of the air pipe.

The specific structure in the figure illustrates that: 1 outer die, 2 inner die, 31 convex strips, 32 dividing strips, 4 rubber plastic foaming plates, 51 grooves, 52 cutting grooves, 6 heat preservation waistbands, 7 air pipes, 71 flanges and 72 flange clamps.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments shown in the drawings.

Example 1.

Referring to fig. 2, an extrusion molding die for producing an air duct flange heat-insulating waistband comprises an outer die 1 and an inner die 2, wherein a molding cavity is formed between the outer wall of the inner die 2 and the inner wall of the outer die 1, a plurality of convex strips 31 longitudinally distributed on the outer wall of the inner die 2 or on the inner wall of the outer die 1 are arranged in the molding cavity, and a plurality of grooves 51 are formed on the inner wall or the outer wall of a product extruded and molded in the molding cavity through the convex strips 31; a separation strip 32 is arranged between any two adjacent convex strips 31, and the separation strip 32 is parallel to the convex strips 31.

After the product is prepared, the product is longitudinally cut and then foamed at high temperature to form a rubber and plastic foamed plate 4, a plurality of parallel grooves 51 are formed in one surface of the rubber and plastic foamed plate 4, and then the rubber and plastic foamed plate 4 is cut to form the heat-insulating waistband 6 with a plurality of grooves 51. The heat-insulating waistband 6 is utilized to wrap the flange 71 of the air pipe 7, the convex part of the flange 71 can be embedded into the groove 51, so that a cold bridge formed by large gaps left on two sides of the flange 71 can be avoided, and the outer surface of the air pipe 7 after being wrapped is flat and attractive.

Because the separating strips 32 are arranged between the adjacent raised strips 31, a cutting groove 52 is formed on the molded rubber-plastic foamed plate 4, and when the rubber-plastic foamed plate 4 is cut, a cutter is aligned with the cutting groove 52 formed on the rubber-plastic foamed plate 4 for simple cutting, so that the rubber-plastic foamed plate 4 can be cut into a heat-insulating waistband 6 with a standard size.

Further, the outer die 1 and the inner die 2 are both cylindrical, the central axes of the outer die 1 and the inner die 2 are overlapped, and the convex strips 31 and the separation strips 32 are circumferentially and uniformly distributed on the outer wall of the inner die 2 around the central axes. The grooves 51 on the rubber-plastic foamed sheet 4 prepared by the method are uniformly distributed, and a plurality of heat-insulating waistbands 6 with the same size can be obtained after slitting, so that the method is suitable for batch production.

Further, the protruding strip 31 is in an inverted trapezoid shape, and the width of the groove bottom surface of the groove 51 formed on the inner wall of the product extruded and formed in the molding cavity is larger than the width of the groove top surface through the protruding strip 3. Referring to fig. 6, when two tuber pipes 7 are connected, after the flange 71 of its tip is overlapped together, generally use flange card 72 to link together two tuber pipes 7, behind the installation flange card 72, the width of flange card 72 is greater than the sum of the width of two flanges 71, and the utility model discloses the width of the tank bottom surface of the recess 51 of heat preservation waistband 6 on preparation ground is greater than the width of tank top surface, and the opening of recess 51 is the shrink form promptly, when can satisfying and holding flange card 72, can guarantee to reduce the clearance between the wall of installation back recess 51 and the flange 71 to this can optimize the heat preservation effect, further prevent to form the condensation that the cold bridge leads to between recess 51 and the flange 71.

Example 2.

Referring to fig. 3, the present embodiment is different from embodiment 1 in that a convex strip 31 and a separation strip 32 are uniformly arranged on the inner wall of the outer die 1, the convex strip 31 and the separation strip 32 are integrated with the inner die 2, and the convex strip 31 and the separation strip 32 form the groove 51 and the undercut 52 on the outer wall of the product extruded in the molding cavity.

The above mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, that is, all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still included in the scope of the present invention.

Claims

1. An extrusion molding die for producing a flange heat-insulation waistband of an air pipe comprises an outer die and an inner die, wherein a molding cavity is formed between the outer wall of the inner die and the inner wall of the outer die; and a partition strip is arranged between any two adjacent raised strips and is parallel to the raised strips.

2. The extrusion molding die for producing the air pipe flange heat-insulating waistband as claimed in claim 1, wherein the outer die and the inner die are both cylindrical, central axes of the outer die and the inner die are coincident, and the raised lines and the partition strips are uniformly arranged on the outer wall of the inner die or the inner wall of the outer die in the circumferential direction around the central axis.

3. The extrusion molding die for manufacturing the flange heat preservation waistband of the air duct according to claim 2, wherein the protruding strip is in an inverted trapezoid shape, and the width of the groove bottom surface of the groove formed on the inner wall or the outer wall of the product extruded in the molding cavity is larger than the width of the groove top surface through the protruding strip.

4. The extrusion molding die for producing the air pipe flange heat-insulating waistband as claimed in claim 3, wherein the raised strips and the partition strips are uniformly arranged on the outer wall of the inner die, the raised strips, the partition strips and the inner die are integrated, and a certain gap is reserved between the partition strips and the outer die.

5. The extrusion molding die for producing the air pipe flange heat-insulating waistband as claimed in claim 3, wherein the raised strips and the partition strips are uniformly distributed on the inner wall of the outer die, the raised strips, the partition strips and the outer die are integrated, and a certain gap is reserved between the partition strips and the inner die.