CN212194119U

CN212194119U - Mold for polyolefin cross-laminated film

Info

Publication number: CN212194119U
Application number: CN202020336733.3U
Authority: CN
Inventors: 易向阳; 朱文军
Original assignee: Upass Material Technology Jiangsu Co ltd
Current assignee: Upass Material Technology Jiangsu Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-12-22
Anticipated expiration: 2030-03-17

Abstract

The utility model relates to a gather alternately mould for laminated film of rare hydrocarbon, the bottom has inside, in, three independent feed inlet outward, and the feed inlet has the mandrel through runner intercommunication mould cavity separately in the middle of the mould cavity, and the outer wall on mould upper portion can be rotatory around the core membrane, and the mould top has the opening and supplies the film to blow off. The utility model discloses simple structure, the installation is little with the processing degree of difficulty, and equipment investment is few. The utility model discloses can replace and rotate, make the thickness point evenly distributed of membrane, the fold of reducible membrane improves the appearance quality of membrane.

Description

Mold for polyolefin cross-laminated film

Technical Field

The utility model belongs to the technical field of chemical industry film production and processing equipment and specifically relates to a mould for poly rare hydrocarbon cross laminated film.

Background

The cross laminated film of the poly-dilute hydrocarbon (polyethylene and polypropylene) has a special two-layer cross laminated structure, so that the material has consistent transverse and longitudinal performances, high strength, tear resistance and consistent transverse and longitudinal performances, and is a film commonly used in the label and building waterproof industries at present.

The cross laminated film has more processes, wherein the quality of the blown film directly influences the quality of the subsequent processes, the blown film head is also a key component, and the existing cross laminated film blown film die head is a non-rotating three-layer co-extrusion die head. The advantage is that glue does not leak. The defect is that the upper rotating frame on the top of the film blowing machine is required to be matched. The rotary frame is used for blowing the film in a radial (circumferential) direction, and the film blowing process has a thick point or a thin strip. If the film is not distributed rotationally, a 'wrapping rib' is formed in the subsequent winding process, the upper rotating frame is used for wrapping the rib when the film is blown, and the thick points or the thin strips are uniformly dispersed. However, when the upper rotating frame rotates, the roller and the film make 360-degree rotation back and forth, which easily causes the generation of film sliding wrinkles.

In order to solve this problem, it is necessary to change the upper rotating frame system to the film head rotating system, and to make the film thickness uniform by the film head rotation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mould for polyolefin cross laminated film can overcome prior art's not enough will go up the revolving rack mode based on the above-mentioned problem, changes into membrane head rotation mode, through the rotation of membrane head, makes the thickness homogenization of membrane.

In order to achieve the above object, the utility model provides a realize like this, provide a mould for poly rare hydrocarbon cross laminated film, the bottom has inside, in, three independent feed inlet outward, and the feed inlet is through runner intercommunication mould cavity separately, has the mandrel in the middle of the mould cavity, and the outer wall on mould upper portion can be rotatory around the core membrane, and the mould top has the opening to supply the film to blow off.

The outer wall of the upper portion of the die is connected with the driven gear disc, the driven gear disc is driven by the driving gear disc, and the driving gear disc is driven by the variable frequency motor.

Furthermore, a sealing ring and a bearing are arranged between the outer wall of the upper part of the mould and the fixed part of the outer wall of the lower part of the mould, so that the outer wall of the upper part of the mould can rotate relative to the fixed part of the outer wall of the lower part of the mould and is sealed between the outer wall of the upper part of the mould and the fixed part of the.

Preferably, the three independent feed inlets at the bottom, the middle and the outer are connected with a three-layer up-blowing co-extruder, and the polymer melt is extruded from the three-layer up-blowing co-extruder and enters the feed inlets at the lower part of the rotary die head. Three independent feed inlets at the inner, middle and outer parts of the bottom are provided with three independent valves for controlling the flow.

The utility model has the advantages that: the utility model discloses simple structure, the installation is little with the processing degree of difficulty, and equipment investment is few. The utility model discloses can replace the rotation, make the thickness point evenly distributed of membrane, the fold of reducible membrane improves the appearance quality of membrane, through rotatory membrane head, except enabling the thickness point evenly distributed of membrane, solves "package muscle", can also effectual thickness uniformity performance improvement that makes the membrane.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be described in more detail with reference to the following drawings and examples:

referring to fig. 1, fig. 1 is a schematic structural diagram of the present invention. The bottom of the die in fig. 1 has three independent feed inlets, i.e. an inner feed inlet, a middle feed inlet and an outer feed inlet, the feed inlets are communicated with a die cavity through

respective flow passages

6, 7 and 12, a core die 1 is arranged in the middle of the die cavity, an outer wall 16 at the upper part of the die can rotate around the core die 1, and the top of the die is provided with an opening for blowing out a thin film.

The outer wall 16 on mould upper portion links to each other with driven gear dish 2, driven gear dish 2 receives driving gear dish 15 to drive, driving gear dish 15 receives inverter motor 14 to drive. A seal ring 3 and a bearing 4 are provided between an outer wall 16 of the upper mold part and the outer wall fixing part 13 of the lower mold part so that the outer wall 16 of the upper mold part can rotate relative to the outer wall fixing part 13 of the lower mold part and is sealed therebetween.

The three independent feed inlets at the bottom, the middle and the outer are connected with a three-layer up-blowing co-extruder, and the polymer melt is extruded out of the three-layer up-blowing co-extruder and enters the feed inlets at the lower part of the rotary die head. The inner, middle and outer three separate feed ports have three

separate valves

10, 9, 11 for controlling the flow.

Therefore, the mold of the present embodiment can be divided into: the outer wall 16 of the upper part of the mould, the outer wall fixing part 13 of the lower part of the mould, the inner cylinder 5, the middle cylinder 8 and the core mould 1. Wherein only the outer wall 16 of the upper part of the die can rotate, three feeding ports and three flow channels are formed among the cylinders, the three flow channels are finally converged in the outer wall 16 of the upper part of the die and a gap 17 formed between the outer wall fixing part 13 of the lower part of the die and the core die 1, the top end of the three flow channels is not sealed, and the raw materials are blown out from the top end after forming a film in the die.

The utility model discloses 16 parts of outer wall on mould upper portion are low-speed rotating part, and inverter motor 14 passes through driving gear 15 and driven gear dish 2, and it is rotatory to drive 16 outer walls on mould upper portion, makes the thickness point circumference portion of membrane divide the homogenization, can be with the thickness point evenly distributed of membrane.

Those skilled in the art can make other modifications within the spirit of the present invention, and all modifications derived from the spirit of the present invention should be within the scope of the present invention.

Claims

1. A mold for a polyalkylene cross-laminated film, characterized in that: the bottom of the mould is provided with an inner feed inlet, a middle feed inlet and an outer feed inlet, the feed inlets are communicated with a mould cavity through respective runners, a core mould is arranged in the middle of the mould cavity, the outer wall of the upper part of the mould can rotate around a core film, and the top of the mould is provided with an opening for blowing out a film.

2. The die for a polyolefin cross laminated film according to claim 1, wherein the outer wall of the upper portion of the die is connected to a driven gear plate, the driven gear plate is driven by a driving gear plate, and the driving gear plate is driven by a variable frequency motor.

3. The mold for a polyolefin cross laminated film according to claim 1, wherein a seal ring and a bearing are provided between an outer wall of the upper portion of the mold and a fixing portion of an outer wall of the lower portion of the mold so that the outer wall of the upper portion of the mold can rotate with respect to the fixing portion of the outer wall of the lower portion of the mold while being sealed therebetween.

4. The die for a polyolefin cross laminated film according to claim 1, wherein said bottom inner, middle and outer three separate feed ports are connected to a triple-layer up-blow co-extruder from which the polymer melt is extruded into the feed ports of the respective layers at the lower portion of the rotary die.

5. The die for a polyolefin cross laminated film according to claim 1, wherein said bottom inner, middle and outer three independent feed ports have three independent valves for controlling the flow rate.