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Sheet extrusion die head

A technology for extruding die heads and sheets, applied in the field of molds, can solve problems such as the inability to fine-tune the thickness of products at the die opening, and achieve the effects of precise axial positioning, good adjustment accuracy and precise precision.

Active Publication Date: 2020-08-28
台州市黄岩亮科模具机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The die opening is the gap of the die lip. During the production of PVB film, because the gap of the die opening is very small, the gap adjustment of the die opening is usually controlled between a few microns to a dozen microns, and the adjustment amount of the adjusting screw cannot meet the requirements of the die opening The purpose of fine-tuning to make the product thickness more uniform needs to be improved

Method used

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  • Sheet extrusion die head
  • Sheet extrusion die head
  • Sheet extrusion die head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A sheet extrusion die, such as figure 1 , figure 2As shown, it includes an upper die body 1 with an upper die lip and a lower die body 2 with a lower die lip, and the upper die lip and the lower die lip are spliced ​​to form a die lip gap 3 . Both the upper mold body 1 and the lower mold body 2 are provided with heating pipes (not shown). The heating pipes heat the temperature of the mold by energizing. Usually, a temperature sensor is connected to the corresponding heating pipes to precisely control the heating temperature of the heating pipes. A heating oil circuit 4 is opened laterally along the lower die body 2 at the outlet end of the lower die body 2 near the die lip gap 3 , and the heating oil circuit 4 can heat the outlet of the die lip gap 3 through the heating oil. In actual use, after the upper mold body 1 and the lower mold body 2 are spliced, the lateral sides of the upper mold body 1 and the lower mold body 2 are fixed by the fixing plate 5 to cover the ...

Embodiment 2

[0043] A sheet extrusion die head differs from Embodiment 1 in that the structure of the stopper 11 is different.

[0044] Such as image 3 As shown, the limiting member 11 includes a limiting seat 111 and a limiting bolt 112 . The limit seat 111 is fixed on the upper mold body 1 through the connecting rod 12 , and the limit seat 111 is located at the end of the expansion tube 82 away from the adjustment rod 81 . The number and position of the limit bolts 112 are set in one-to-one correspondence with the expansion adjusting member 8 . The limit bolt 112 is threaded on the limit seat 111, and the limit bolt 112 is coaxially arranged with the corresponding expansion tube 82. The limit bolt 112 is located at the end of the expansion tube 82 away from the adjustment rod 81 and is pressed against the expansion tube 82 away from The end of the rod 81 is adjusted to limit the position of the expansion tube 82 .

[0045] When the expansion adjustment member 8 is installed, the limi...

Embodiment 3

[0047] A sheet extrusion die head, the difference from Embodiment 1 is that the structures of the expansion tube 82 and the stopper 11 are different.

[0048] Such as Figure 4 , Figure 5 As shown, the expansion tube 82 includes a tube body 821 coaxially arranged on the adjustment rod 81 and a limit column 822 coaxially arranged at the end of the tube body 821 away from the adjustment rod 81 , and the heating rod 10 is located inside the tube body 821 . One end of the tube body 821 close to the limiting column 822 is provided with a wiring groove 13 , and the wiring groove 13 is arranged radially through the side wall of the tube body 821 for the wires of the heating rod 10 to pass through. The limit column 822 is a cylinder and is set equal to the diameter of the tube body 821. The limit column 822 is coaxially fixed with a positioning column 14 near the end face of the tube body 821. The positioning column 14 is coaxially inserted into the tube body 821 so that the limit c...

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Abstract

The invention discloses a sheet extrusion die head, and relates to the technical field of dies. The sheet extrusion die head comprises an upper die body with an upper die lip and a lower die body witha lower die lip, wherein the upper die lip and the lower die lip are spliced to form a die lip gap; a die lip adjusting groove is formed in one side, deviating from the lower die body, of the upper die body; a plurality of sliding holes are formed in the upper die body at intervals in the transverse direction; an expansion adjusting piece is correspondingly arranged on each sliding hole; each expansion adjusting piece comprises an adjusting rod and an expansion pipe; the adjusting rods are coaxially connected to the sliding holes in a sliding mode; one end of each adjusting rod abuts againstthe side wall, close to the die lip gap, of the die lip adjusting groove; the expansion pipes are coaxially arranged at the ends, away from the die lip adjusting groove, of the adjusting rods; heatingrods are arranged in the expansion pipes; limiting pieces are further arranged on the ends, away from the upper die body, of the adjusting rods; each limiting piece comprises a limiting seat fixedlyconnected to the upper die body; and the limiting seats are positioned at the ends, away from the adjusting rods, of the expansion pipes so as to limit the positions of the expansion pipes. The expansion adjusting pieces are arranged, so that the die lip gap can be finely adjusted, and the adjusting precision is higher.

Description

technical field [0001] The invention relates to the technical field of moulds, more specifically, it relates to a sheet extrusion die head. Background technique [0002] PVB film is mainly used for laminated glass, which is to sandwich a layer of PVB film with polyvinyl butyral as the main component between two pieces of glass. In the production of PVB film, a sheet extrusion die is required to extrude PVB through the lip gap of the sheet extrusion die to form a PVB film. [0003] For example, the Chinese patent with the patent number CN202608022U discloses a die head of an extruder, including an upper die with an upper die lip and a lower die with a lower die lip, and the upper die lip and the lower die lip form a die mouth , the opening of the die mouth is adjusted by a plurality of upper die lip adjustment screws and a plurality of lower die lip adjustment screws, and a plurality of through holes are arranged at transverse intervals on the die body of the upper die, and ...

Claims

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Application Information

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IPC IPC(8): B29C48/07B29C48/31B29C48/25B29K29/00
CPCB29C48/07B29C48/313B29C48/2566B29K2029/14
Inventor 李亮
Owner 台州市黄岩亮科模具机械有限公司
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