CN210501334U

CN210501334U - Blow mold for producing polyurethane film

Info

Publication number: CN210501334U
Application number: CN201921112581.2U
Authority: CN
Inventors: 李业民
Original assignee: Shandong Kaiyi Plastic Technology Co Ltd
Current assignee: Shandong Kaiyi Plastic Technology Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-05-12
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to a film blowing technical field, concretely relates to blowing mould of production polyurethane film. The mold comprises a mold core and a mold sleeve, wherein the mold core comprises an inner column, a plurality of uniformly distributed telescopic rods are arranged in the circumferential direction of the inner column, the tail ends of two adjacent telescopic rods are fixedly connected with a foundation block and a supplement block respectively, the cross section of the foundation block is in a fan-shaped ring shape, supplement grooves are formed in two ends of the inner side of the foundation block respectively, the supplement blocks are in two states of being positioned in the supplement grooves and being positioned outside the supplement grooves, when a thick film is produced, the telescopic rods shrink, the supplement blocks are positioned in the supplement grooves at the moment, and the mold core becomes thin; when producing thinner film, the telescopic link extension, supplementary piece this moment is located outside supplementing the groove, and supplementary piece reachs the outward flange of foundatin block, and the mold core becomes thick, adopts thickness adjustable mold core to realize the quick adjustment to the passageway width, can realize the production to different thickness films.

Description

Blow mold for producing polyurethane film

Technical Field

The utility model relates to a film blowing technical field, concretely relates to blowing mould of production polyurethane film.

Background

Film blowing, also known as flat-folded film tube extrusion or blown film extrusion, is a major method for producing plastic films. The plastic is added into an extruder to be extruded into a cylinder (tube) shape from an annular gap of a front end die after being melted, compressed air is introduced from a central hole of a core rod of a machine head to blow the cylinder into a bubble tube shape (generally blown by 2 to 3 times), the longitudinal and transverse directions are extended to obtain the bubble tube with a certain blowing multiple, the bubble tube is cooled by an outer air ring (sometimes internally cooled), then the bubble tube is flattened by a guide clamping plate and a traction clamping roller to prevent the air in the bubble tube from leaking to maintain the required constant blowing pressure, the flattened bubble tube becomes a flat-folded double-layer film, and finally the flat-folded double-layer film enters a coiling device to be coiled.

Chinese utility model patent with publication number CN201712175U a blown film mould point mode heating device, including the mold core, the mold core outlying is the annular array on the die sleeve and evenly sets up a plurality of adjustable heaters and be furnished with the temperature controller, and every adjustable heater outside is equipped with a heat insulating mattress.

However, the film blowing mold cannot adjust the thickness of the film, a user needs to measure films with different thicknesses, the films cannot be adjusted quickly, the processing process is delayed, and meanwhile the labor intensity of the user is also increased.

SUMMERY OF THE UTILITY MODEL

To the above insufficiency, the utility model provides a blowing mould of production polyurethane film.

The utility model provides a technical scheme that its technical problem adopted is: a blow mold for producing polyurethane films comprises a mold core and a mold sleeve, wherein the mold core comprises an inner column, a plurality of uniformly distributed telescopic rods are arranged in the circumferential direction of the inner column, the tail ends of two adjacent telescopic rods are fixedly connected with a foundation block and a supplement block respectively, the cross section of the foundation block is in a fan-shaped ring shape, supplement grooves are formed in two ends of the inner side of the foundation block, the supplement blocks are in two states of being located in the supplement grooves and being located outside the supplement grooves, when thicker films are produced, the telescopic rods shrink, the supplement blocks are located in the supplement grooves at the moment, and the mold core becomes thin; when producing thinner film, the telescopic link extension, supplementary piece this moment is located outside supplementing the groove, and supplementary piece reachs the outward flange of foundatin block, and the mold core becomes thick, adopts thickness adjustable mold core to realize the quick adjustment to the passageway width, can realize the production to different thickness films.

As optimization, a plurality of adjustable heaters are uniformly arranged on the die sleeve on the periphery of the die core in an annular array manner and are provided with temperature controllers, a heat insulation pad is arranged on the outer side of each adjustable heater, and the thick path position of the die is heated by adopting a multi-group point heating structure of the die, so that the temperature of the thick path position is increased, the film at the thick path position is influenced by relatively high temperature, the flowability is improved, and the thick path of the film is eliminated.

And as optimization, the number of the basic blocks is the same as that of the supplementary blocks, and the basic blocks and the supplementary blocks are more than or equal to 4, so that the outer surface of the mold core is smoother.

As optimization, the telescopic link adopts the electromagnetism telescopic link, because atmospheric pressure telescopic link and hydraulic telescoping link receive the temperature influence great, inconvenient adoption.

The utility model has the advantages that: the utility model provides a blowing mould for producing polyurethane film, which adopts a thickness-adjustable mould core to realize the rapid adjustment of the width of a channel, and can realize the production of films with different thicknesses; the heating structure with a plurality of groups of points of the die is adopted for heating, so that the temperature of the thick path can be increased, the film at the thick path is influenced by relatively high temperature, the fluidity is improved, and the thick path of the film is eliminated; the temperature of the heater can be adjusted and controlled, and the quality of the blown film is ensured.

Drawings

Fig. 1 is a schematic front sectional view of the present invention;

fig. 2 is a schematic top view of the wide film of the present invention;

fig. 3 is a schematic top view of the narrow film of the present invention;

fig. 4 is a schematic view of the mold core of the present invention.

The device comprises a die sleeve 1, a die sleeve 2, a die core 3, a constant temperature heater 4, a channel 201, an inner column 202, a base block 203, a supplement block 204, an expansion rod 205 and a supplement groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The blow mold for producing the polyurethane film shown in fig. 1-4 comprises a mold core 2 and a mold sleeve 1, wherein the mold core 2 comprises an inner column 201, a plurality of uniformly distributed telescopic rods 204 are arranged in the circumferential direction of the inner column 201, the tail ends of two adjacent telescopic rods 204 are respectively and fixedly connected with a base block 202 and a supplement block 203, the cross section of the base block 202 is in a fan-ring shape, both ends of the inner side of the base block 202 are respectively provided with a supplement groove 205, the supplement block 203 has two states of being positioned in the supplement groove 205 and being positioned outside the supplement groove 205, when a thicker film is produced, the telescopic rods 204 are contracted, the supplement block 203 is positioned in the supplement groove 205 at this time, and the mold core 2 becomes thinner (fig. 2); when a thin film is produced, the telescopic rod 204 is extended, the supplementing block 203 is located outside the supplementing groove 205 at the moment, the supplementing block 203 reaches the outer edge of the base block 202, the mold core 2 becomes thicker (fig. 3 and 4), the mold core 2 with the adjustable thickness is adopted to realize the rapid adjustment of the width of the channel 4, and the production of the thin films with different thicknesses can be realized.

In this embodiment, a plurality of adjustable heaters are uniformly arranged in an annular array manner on the die sleeve 1 on the periphery of the die core 2 and are provided with temperature controllers, a heat insulation pad is arranged outside each adjustable heater, and the thick path position is heated by adopting a multi-group point heating structure of the die, so that the temperature of the thick path position is increased, the film at the thick path position is influenced by relatively high temperature, the flowability is improved, and the thick path of the film is eliminated.

In this embodiment, the number of the base blocks 202 is the same as that of the complementary blocks 203, and the number of the base blocks is greater than or equal to 4, so that the outer surface of the mold core 2 is smoother.

In this embodiment, the telescopic rod 204 is an electromagnetic telescopic rod 204, and the pneumatic telescopic rod 204 and the hydraulic telescopic rod 204 are not convenient to use because they are greatly affected by temperature.

The working principle is as follows: when a wide channel 4 is needed, the telescopic rod 204 is contracted, the supplement block 203 is positioned in the supplement groove 205, and the mold core 2 becomes thin (fig. 2); when a narrow passage 4 is required, the telescopic rod 204 is extended, the complementary block 203 is positioned outside the complementary groove 205, the complementary block 203 reaches the outer edge of the base block 202, and the mold core 2 becomes thicker (fig. 3 and 4).

The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a blowing mould of production polyurethane film, includes mold core and die sleeve, its characterized in that: the mold core comprises an inner column, a plurality of uniformly distributed telescopic rods are arranged in the circumferential direction of the inner column, the tail ends of two adjacent telescopic rods are respectively and fixedly connected with a foundation block and a supplement block, the cross section of the foundation block is in a fan-shaped ring shape, supplement grooves are formed in two ends of the inner side of the foundation block, the supplement blocks are in two states of being positioned in the supplement grooves and being positioned outside the supplement grooves, when a thick film is produced, the telescopic rods shrink, and the supplement blocks are positioned in the supplement grooves at the moment; when producing thin films, the telescopic rods are extended, and the supplement blocks are positioned outside the supplement grooves.

2. The blow mold for producing a polyurethane film according to claim 1, characterized in that: the mold sleeve on the periphery of the mold core is uniformly provided with a plurality of adjustable heaters in an annular array manner and is provided with a temperature controller, and the outer side of each adjustable heater is provided with a heat insulation pad.

3. The blow mold for producing a polyurethane film according to claim 2, characterized in that: the number of the basic blocks is the same as that of the supplementary blocks, and the basic blocks and the supplementary blocks are all larger than or equal to 4 blocks.

4. A blow mold for producing a polyurethane film according to claim 3, characterized in that: the telescopic link adopts the electromagnetism telescopic link.