CN211843101U - Air exhaust sealing plate for connecting shaping die and shaping water tank of plastic extruder - Google Patents

Abstract

The utility model discloses a closing plate of bleeding for plastic extrusion moulding machine, it solves the problem of current closing plate connection leakage decompression between stock mould and design water tank, including the closing plate body, this internal negative pressure chamber that encircles the extrusion section passageway that is provided with of closing plate, this internal air exhaust channel that is provided with of closing plate, air exhaust channel and this internal negative pressure chamber of closing plate be linked together, air exhaust channel interface connection have the joint of bleeding, the joint of bleeding be connected with air exhaust device. The utility model discloses an air exhaust device bleeds and makes and reduce the negative pressure value, makes the gas leakage between stock mould and the water tank obtain solving, and the unstable phenomenon in vacuum also obtains solving.

Description

Air exhaust sealing plate for connecting shaping die and shaping water tank of plastic extruder

Technical Field

The utility model relates to a sealing plate for connecting between a shaping die for dry shaping and a shaping water tank for wet shaping of a plastic extrusion molding machine.

Background

The extrusion forming technology for plastic section bar is a continuous process of heating and pressurizing material by extruder, extruding the material by extrusion die head to form blank, and quickly cooling and solidifying the blank by shaping die for dry shaping and shaping water tank for wet shaping. The parison enters the shaping, and after the shaping and vacuum adsorption, the parison can be fully contacted with the wall of the shaping cavity (the dry shaping has the cooling function), and the parison is rapidly solidified to form the final plastic profiled bar product. Because the extrusion molding of the plastic section is restricted by the processing and manufacturing conditions, the shaping die for dry shaping and the water tank for wet shaping are always dispersed and independent, the requirement of the extrusion molding of the plastic section on vacuum is very high, and the two dispersed parts of the shaping die for dry shaping and the water tank for wet shaping are connected into a whole with very good sealing performance in the extrusion process to form a closed space. However, it is difficult to achieve a seal between the former and the water tank due to the constraints of objective conditions. At present, the solution is to add a plate sealing plate between the dry shaping (shaping die) and the wet shaping (water tank) for transition connection, and the plate sealing plate is provided with a profile channel, as shown in fig. 1, and the connection mode is as shown in fig. 2. The addition of the sealing plate improves the air leakage phenomenon between the connection of the dry shaping mold (shaping mold) and the wet shaping mold (water tank), but the air leakage phenomenon and the vacuum instability phenomenon still exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems of air leakage and vacuum instability between the setting die and the setting water tank through the connection of the sealing plate.

In order to solve the above problem, the utility model adopts the following technical scheme: a closing plate of bleeding that is used for plastic extruder stock mould and design water tank to be connected usefulness, including the closing plate body, be provided with the extruded profile passageway that runs through the closing plate body on the closing plate body, characterized by this internal negative pressure chamber that encircles the extruded profile passageway that is provided with of closing plate, this internal air bleed passageway that is provided with of closing plate, air bleed passageway and this internal negative pressure chamber of closing plate be linked together, the air bleed access opening be connected with the air bleed and connect, the air bleed connect and air exhaust device be connected.

Adopt above-mentioned technical scheme, bleed through air exhaust device, this internal negative pressure chamber of sealing plate will become the negative pressure, has solved stock mould and has passed through the closing plate with the design water tank and be connected and cause gas leakage and unstable phenomenon in vacuum.

In a further improvement, the air exhaust channels are symmetrically distributed on two sides of the extruded section channel.

The utility model has the advantages that: the utility model discloses a set up the negative pressure chamber that communicates with the extrusion material passageway on the closing plate body, make negative pressure chamber be connected with air exhaust device, bleed through air exhaust device and make and reduce the negative pressure value, make the gas leakage between stock mould and the water tank solve, the unstable phenomenon in vacuum also obtains solving.

Drawings

FIG. 1 is a schematic view of a prior art seal plate;

FIG. 2 is a schematic view of a prior art seal plate coupled to a sizing die and a sizing water tank;

FIG. 3 is a schematic view of the sealing plate body of the present invention;

FIG. 4 is a left side view of FIG. 3;

fig. 5 the utility model discloses with stock mould and design water tank connection schematic diagram.

In the figure, 1, a sealing plate body, 2, an extrusion molding channel, 3, a shaping mold, 4, a shaping water tank, 5, an air exhaust channel, 6, an air exhaust joint, 7, a negative pressure cavity, 8 and an air exhaust device.

Detailed Description

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

As shown in fig. 3, the air exhaust sealing plate for connecting the shaping die and the shaping water tank of the plastic extruder comprises a sealing plate body 1, wherein the sealing plate body is a square cast steel body, an extruded section passage 2 penetrating through the sealing plate body is arranged on the sealing plate body 1, and the shape of the section passage 2 is consistent with that of the extruded section. As shown in fig. 4, a negative pressure cavity 7 surrounding the extruded profile channel 2 is arranged in the sealing plate body 1, an air exhaust channel 5 is arranged in the sealing plate body 1, the air exhaust channel 5 is a through hole, the air exhaust channel 5 is communicated with the negative pressure cavity 7 in the sealing plate body, an interface of the air exhaust channel 5 is connected with an air exhaust joint 6, and the air exhaust joint 6 is connected with an air exhaust device 8. The air extraction channels 5 are symmetrically distributed on both sides of the extrusion profile channel.

The utility model discloses the installation is used and is shown in fig. 5, the utility model discloses connect between stock mould 3 and design water tank 4, for easy understanding, air exhaust device 8 has been saved in fig. 5.

Claims (2)

1. A closing plate of bleeding that is used for plastic extruder stock mould and design water tank to be connected usefulness, including closing plate body (1), be provided with extruded section bar passageway (2) that run through the closing plate body on closing plate body (1), characterized by be provided with in closing plate body (1) and encircle negative pressure chamber (7) of extruded section bar passageway (2), closing plate body (1) in be provided with bleed passage (5), bleed passage (5) be linked together with this internal negative pressure chamber (7) of closing plate, bleed passage (5) interface connection have bleed joint (6), bleed joint (6) be connected with air exhaust device (8).

2. The suction sealing plate for connecting the sizing die and the sizing water tank of the plastic extruder as claimed in claim 1, wherein the suction passages (5) are symmetrically distributed on both sides of the extruded profile passage.

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