CN211518421U - Even membrane head of curtain coating cast sheet in BOPP membrane manufacturing - Google Patents

Abstract

The utility model belongs to the field of BOPP film manufacturing, in particular to a film head with uniform cast sheets in BOPP film manufacturing, which comprises a mounting plate and a lower film body fixedly arranged at the bottom of the mounting plate, wherein a feeding cavity is arranged inside the mounting plate, a blanking channel is arranged inside the lower film body and is positioned under the feeding cavity, cavities are arranged at both sides of the inner wall of the lower film body, the cavities and the blanking channel are mutually penetrated, two stoppers are respectively and slidably arranged inside the cavities, a stopper with two springs is arranged inside the lower film body, the two stoppers are mutually attached to divide the middle of the blanking channel, a melt can be blocked when entering the blanking channel, an extruder continuously extrudes the melt to increase the pressure of the melt below, the two stoppers are downwards extruded after the melt is pressed, the spring at the rear of the stopper is contracted to drive the stopper to move towards the inside of the cavity, the melt can be made to flow down through the two blocks.

Description

Even membrane head of curtain coating cast sheet in BOPP membrane manufacturing

Technical Field

The utility model relates to a BOPP membrane field of making specifically is an even membrane head of curtain coating casting sheet in BOPP membrane is made.

Background

BOPP film, i.e. biaxially oriented polypropylene film, is a plastic product which is specially formed and processed by means of physics, chemistry, machinery and the like, and is produced by that melt of high molecular polypropylene is firstly made into a sheet or a thick film through a long and narrow machine head, then is stretched in two vertical directions simultaneously or step by step in a special stretcher at a certain temperature and a set speed, and is made into a film through proper cooling or heat treatment or special processing.

At present, the T-shaped film head is generally adopted for casting, an extruder is adopted to extrude the melt into the film head, and the melt flows out from an opening at the other end to form a casting sheet, but the T-shaped film head and the extruder are always in a vertical state, the melt directly enters into a branch pipe inside the film head and can directly flow out downwards, the flow rate of the melt towards the lower part cannot be controlled, the condition of uneven flow rate of the melt is easy to occur, and the uniformity of the thickness of the manufactured casting sheet is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an even membrane head of curtain coating cast sheet in BOPP membrane manufacturing to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an even membrane head of curtain coating cast sheet in BOPP membrane manufacturing, includes mounting panel and fixed mounting in the lower diaphragm body of mounting panel bottom, the feeding chamber has been seted up to the mounting panel inside, the unloading passageway has been seted up to the internal portion of lower diaphragm, the unloading passageway is located under the feeding chamber, the cavity has all been seted up to lower diaphragm body inner wall both sides, the cavity with the unloading passageway runs through each other, two the inside equal slidable mounting of cavity has the dog, the shifting chute has all been seted up to both sides about the cavity, the equal fixedly connected with movable block in both ends about the dog, two the movable block respectively slidable mounting be two inside the shifting chute, the dog is located one side fixedly connected with a plurality of spring of the cavity inside, the spring other end with cavity inner wall fixed connection.

As a further aspect of the present invention: spacing grooves have all been seted up to the cavity left and right sides inner wall, the equal fixedly connected with stopper in both ends about the dog, two the stopper is respectively slidable mounting at two spacing inslot portion.

As a further aspect of the present invention: two equal fixedly connected with baffle in dog bottom, the baffle with the dog lateral wall is in the horizontality.

As a further aspect of the present invention: the top of the end of the stop block positioned outside the cavity is provided with an arc-shaped guide angle.

As a further aspect of the present invention: the feeding cavity is of a trapezoidal structure.

As a further aspect of the present invention: the width of the blanking channel is the same as that of the bottom of the feeding cavity.

As a further aspect of the present invention: a plurality of the springs are distributed up and down.

Compared with the prior art, the beneficial effects of the utility model are that:

the inside dog that has two springs that sets up of lower diaphragm body, two dogs paste each other and cut off in the middle of the unloading passageway together, can block the fuse-element when the fuse-element enters into unloading passageway inside, the extruder lasts the pressure that the fuse-element that extrudes fuse-element increase below received, fuse-element pressurized back is to two dogs of extrusion down, the spring shrink at dog rear drives the dog and moves to the cavity is inside, can make the fuse-element pass two dogs downward flow, make the fuse-element can flow down the outer portion of lower diaphragm with even speed, guarantee the homogeneity of the curtain coating cast sheet thickness that produces, outwards extrude the speed of fuse-element through control extruder during the use, can control the dynamics of two dogs of fuse-element downward extrusion, and then the thickness of the curtain coating cast sheet that the adjustment produced.

Drawings

FIG. 1 is a schematic structural diagram of a uniform film head of a cast sheet in BOPP film manufacture;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic perspective view of a cast sheet uniform film head in BOPP film manufacturing;

FIG. 4 is a schematic cross-sectional view of the side of a uniform film head of a cast sheet in the manufacture of a BOPP film.

In the figure: 1. mounting a plate; 11. a feed cavity; 2. a lower membrane body; 21. a blanking channel; 22. a cavity; 23. a moving groove; 24. a limiting groove; 3. a stopper; 31. a spring; 32. a moving block; 33. a limiting block; 34. arc-shaped lead angles; 35. and a baffle plate.

Detailed Description

Please refer to fig. 1-4, in the embodiment of the utility model, a film head that curtain coating cast sheet is even in BOPP membrane manufacturing, lower diaphragm 2 including mounting panel 1 and fixed mounting in mounting panel 1 bottom, feeding chamber 11 has been seted up to mounting panel 1 inside, unloading passageway 21 has been seted up to lower diaphragm 2 inside, unloading passageway 21 is located feeding chamber 11 under, cavity 22 has all been seted up to lower diaphragm 2 inner wall both sides, cavity 22 runs through each other with unloading passageway 21, the inside equal slidable mounting in two cavities 22 has dog 3, shifting chute 23 has all been seted up to both sides about cavity 22, the equal fixedly connected with movable block 32 in both ends about dog 3, two movable block 32 are slidable mounting respectively inside two shifting chutes 23, dog 3 is located one side fixedly connected with a plurality of spring 31 of cavity 22 inside, the spring 31 other end and cavity 22 inner wall fixed connection.

In fig. 1 to 4: the lower membrane body 2 is arranged at the bottom of the mounting plate 1, the mounting plate 1 and the lower membrane body 2 are connected together to form a membrane head, a plurality of mounting holes are formed in the mounting plate 1, the mounting plate 1 can be mounted on an extruder through the mounting holes, the membrane head is further mounted, a feeding cavity 11 is formed in the mounting plate 1, a blanking channel 21 with the same width as the bottom of the feeding cavity 11 is formed in the lower membrane body 2, the top of the blanking channel 21 is connected with the bottom of the feeding cavity 11, when the extruder is used, a melt is extruded into the feeding cavity 11 by the extruder, the melt flows downwards along the inner wall of the feeding cavity 11, the melt downwards penetrates through the feeding cavity 11 and enters into the blanking channel 21, cavities 22 are formed in two sides of the inner wall of the lower membrane body 2, the stoppers 3 capable of sliding left and right are arranged in the two cavities 22, when the melt downwards enters into the blanking channel 21, the two stoppers, the two stop blocks 3 are attached together to form a barrier which can block the melt flowing downwards, the top of one end of each stop block 3, which is positioned at the outer side of the cavity 22, is provided with an arc-shaped guide angle 34, the arc-shaped guide angles 34 between the two stop blocks 3 are oppositely arranged, so that a downward groove is formed between the two stop blocks 3, the melt can flow downwards along the inner wall of the groove formed by the two arc-shaped guide angles 34 at the tops of the two stop blocks 3 after being blocked by the barrier formed by the two stop blocks 3, the extruder continuously extrudes the melt downwards, so that the space between the blanking channel 21 and the two stop blocks 3 is filled with the melt, the extruder continuously extrudes the melt downwards, and as the melt capacity in the space between the blanking channel 21 and the two stop blocks 3 is increased, the melt in the blanking channel 21 is increased in pressure, the melt above downwards extrudes the melt, and the groove formed by the arc-, the two check blocks 3 respectively move backwards, one side of the check block 3 positioned in the cavity 22 is fixedly connected with a plurality of springs 31, the other ends of the springs 31 are fixedly connected with the inner wall of the cavity 22, the check block 3 moves backwards to contract the springs 31, so that the two check blocks 3 can be respectively separated towards two sides, the springs 31 are distributed up and down, the stability of the check block 3 moving backwards can be improved, the springs 31 can also increase the degree of the check block 3 to be pressed, at the moment, the melt moves downwards from a conveying cavity formed between the two check blocks 3, the bottoms of the two check blocks 3 are both fixedly connected with baffle plates 35, the baffle plates 35 and the outer side walls of the check blocks 3 are in a horizontal state, the melt flows downwards along the baffle plates 35 after passing through the conveying cavity formed between the two check blocks 3 along the check blocks 3, the melt can continuously flow downwards along the baffle plates 35, and the interaction of the two, the width of the melt can be kept flowing downwards continuously at the moment, the melt flows downwards along the baffle 35 at a constant speed to the outside of the lower film body 2, the stop block 3 with the spring 31 is arranged inside the lower film body 2, the melt is stopped when entering the inside of the blanking channel 21, the pressure on the melt below can be controlled by controlling the speed of the outward extrusion of the melt, the two stop blocks 3 are extruded downwards after the melt is pressed, the stop blocks 3 are driven to move towards the inside of the cavity 22 by the contraction of the spring 31 behind the stop blocks 3, the melt can flow downwards by passing through the two stop blocks 3, the melt can flow downwards to the outside of the lower film body 2 at a uniform speed, the uniformity of the thickness of the manufactured casting sheet is ensured, the speed of the outward extrusion of the melt by an extruder can be controlled when the casting sheet is used, the force of the downward extrusion of the melt on the two stop blocks 3 can be controlled, and, moving grooves 23 have been all seted up to both sides about cavity 22, the equal fixedly connected with movable block 32 in both ends about dog 3, and two movable blocks 32 are respectively slidable mounting inside two moving grooves 23, and when dog 3 that the spring 31 drove to the retrogression moves to cavity 22 is inside, the movable block 32 at dog 3 both ends about respectively in the inside backward movement of two moving grooves 23, stability when can improving dog 3 and remove, appear the skew when preventing to remove.

In fig. 1, 2 and 4: the inner walls of the left side and the right side of the cavity 22 are respectively provided with a limiting groove 24, the left end and the right end of the stop block 3 are respectively fixedly connected with a limiting block 33, and the two limiting blocks 33 are respectively arranged in the two limiting grooves 24 in a sliding manner; when the stopper 3 driven by the backward contraction of the spring 31 moves towards the inside of the cavity 22, the limiting blocks 33 at the left end and the right end of the stopper 3 move backwards in the two limiting grooves 24 respectively, so that the stability of the stopper 3 during movement can be improved, the deviation can be prevented during movement, the moving block 32 and the moving groove 23 are matched with each other, the limiting blocks 33 and the limiting grooves 24 are matched with each other, the stopper 3 can be limited simultaneously during movement of the stopper 3, the stability of the stopper 3 during movement is ensured, the stopper 3 can keep a linear motion state during movement, and the deviation can be prevented during movement.

In fig. 1: the feeding cavity 11 is of a trapezoidal structure; the trapezoidal configuration of the feed cavity 11 facilitates the downward flow of the melt extruded from the extruder.

The utility model discloses a theory of operation is: when the melt extruding machine is used, the mounting plate 1 is mounted on the extruding machine through the mounting hole in the mounting plate 1, when the melt extruding machine is used, a melt is extruded into the feeding cavity 11, the melt downwards penetrates through the feeding cavity 11 along the inner wall of the feeding cavity 11 and enters into the discharging channel 21, when the melt downwards enters into the discharging channel 21, the two stop dogs 3 are mutually attached together, the melt downwards flows onto the stop dogs 3, after being blocked by the barrier formed by the two stop dogs 3, the melt can downwards flow along the inner wall of the groove formed by the two arc guide angles 34 at the tops of the two stop dogs 3 and enter into the groove, the extruding machine continuously extrudes the melt downwards, so that the melt is filled in the space between the discharging channel 21 and the two stop dogs 3, the extruding machine continuously extrudes the melt downwards, and the pressure of the melt in the discharging channel 21 is increased along with the increase of the melt capacity in, the melt above extrudes the melt below downwards, the melt under pressure below extrudes the groove formed by the arc-shaped guide angle 34 downwards, so that the two stop dogs 3 respectively extrude the spring 31, the spring 31 contracts to drive the two stop dogs 3 to move backwards, so that the two stop dogs 3 are respectively separated towards two sides, at the moment, the melt moves downwards from the conveying cavity formed between the two stop dogs 3, the melt continuously flows downwards along the baffle 35 after downwards passing through the conveying cavity, the melt flows downwards along the baffle 35 at a constant speed to the outside of the lower film body 2, the melt can downwards flow out of the lower film body 2 at a uniform speed, and the uniformity of the thickness of the manufactured casting sheet is ensured.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (7)

1. The utility model provides a curtain coating casts even membrane head of piece in BOPP membrane manufacturing, includes mounting panel (1) and fixed mounting in lower membrane body (2) of mounting panel (1) bottom, its characterized in that: a feeding cavity (11) is arranged in the mounting plate (1), a blanking channel (21) is arranged in the lower film body (2), the blanking channel (21) is positioned under the feeding cavity (11), the two sides of the inner wall of the lower membrane body (2) are both provided with a cavity (22), the cavities (22) and the blanking channel (21) are mutually penetrated, the inner parts of the two cavities (22) are respectively provided with a stop block (3) in a sliding way, the upper side and the lower side of the cavity (22) are both provided with a moving groove (23), the upper end and the lower end of the stop block (3) are both fixedly connected with moving blocks (32), the two moving blocks (32) are respectively arranged in the two moving grooves (23) in a sliding way, one side of the stop block (3) positioned in the cavity (22) is fixedly connected with a plurality of springs (31), the other end of the spring (31) is fixedly connected with the inner wall of the cavity (22).

2. The film head with the uniform tape casting cast sheet in the BOPP film manufacturing process according to claim 1, wherein the inner walls of the left side and the right side of the cavity (22) are respectively provided with a limiting groove (24), the left end and the right end of the stop block (3) are respectively fixedly connected with a limiting block (33), and the two limiting blocks (33) are respectively and slidably mounted in the two limiting grooves (24).

3. The film head with uniform cast sheets in the manufacture of the BOPP film is characterized in that the bottoms of the two check blocks (3) are fixedly connected with a baffle (35), and the baffle (35) and the outer side wall of the check block (3) are in a horizontal state.

4. A head for casting cast sheet uniformity in BOPP film production according to claim 1, wherein the stopper (3) has a curved chamfer (34) at the top of the end outside the cavity (22).

5. A head for casting cast homogeneous films in BOPP film production according to claim 1, wherein the feed chamber (11) is of trapezoidal configuration.

6. A head for casting cast sheet uniformity in BOPP film production according to claim 1, wherein the width of the blanking channel (21) is the same as the width of the bottom of the feeding cavity (11).

7. A head for casting cast uniform films in BOPP film production according to claim 1, wherein a plurality of said springs (31) are distributed up and down.

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