CN106584735A

CN106584735A - Film cooling device

Info

Publication number: CN106584735A
Application number: CN201611241897.2A
Authority: CN
Inventors: 汪为健; 尚东艳
Original assignee: Stargroup Research & Integration Co Ltd
Current assignee: Stargroup Research & Integration Co Ltd
Priority date: 2016-12-29
Filing date: 2016-12-29
Publication date: 2017-04-26

Abstract

The invention provides a film cooling device which is additionally provided with a cooling system at a cold drum 70 to overcome the problem that subsequent stretching is affected by a crystallization phenomenon easily caused inside a film 60 because two surfaces of the film 60 are cooled nonuniformly and the cooling speed is relatively low in the prior art. The technical scheme of the invention is as follows: the film cooling device is characterized by being composed of the cold drum 70, a die head 80 and the film cooling system; the die head 80 is located above the cold drum 70; a viscous-flow-state melt flowing out of the die head 80 forms the film 60 along the cold drum 70; and the cooling system is located at the other side of the film. The film cooling system is composed of an air intake system 10, a heat exchange system 20, a flexible connection 30, a moving unit 40 and a leeward system 50. After the technical scheme is adopted, the defect of the original film cooling process is overcome, the cooling speed is improved, and the surface temperature of the film 60 is made to be uniform, so that the cooling work efficiency is increased.

Description

A kind of diaphragm chiller

Technical field

The invention belongs to the technical field of plastic sheeting biaxial tension technology and developing direction, more particularly to one kind is used for The technical field of diaphragm flow casting molding.

Background technology

In recent years, Chinese bidirectional stretching production line have developed rapidly, and various plastic sheetings are double to draw production line existing nearly hundred, but Major part is from external introduction.At present, domestic thin film is double draws production line also emerging, and also having can be thin with autonomous Design, manufacture Film is double to draw production line, but production line scale and technical merit also have a certain distance.It is wherein heavier in thin film stretching production line The link diaphragm wanted is that the uniform and stable melt for coming extrusion system conveying is cast on the extremely cold drum for rotating by die head, is made The unformed sheet of formation, use for next procedure stretching, therefore the cooling technique of diaphragm is important, especially thicker Diaphragm, if the both sides rate of cooling of diaphragm is uneven, can cause diaphragm core to have crystallization, and there is the diaphragm of crystallization inside, will Can there are drawn products quality problems in follow-up vertical and horizontal stretching, it is higher to the requirement of diaphragm chiller, and it is existing Diaphragm cooling in technology relies primarily on cold drum of the inside full of cooling medium without independent chiller, due to diaphragm only Having can be cooled near the side of cold drum, be on the outside of diaphragm and air contact, but due to two sides cooling medium difference, therefore This technical scheme of the prior art occurs that diaphragm both sides rate of cooling is inconsistent, so as to cause diaphragm especially thicker Diaphragm, inside occur crystallization, easily cause can posterior drawing process and quality problems occur, cause film gauge uniformity poor Etc. technical problem.

The content of the invention

The purpose of the present invention is, in order to overcome prior art in diaphragm surfaces externally and internally it is inconsistent in Leng Guchu rate of cooling, The different serious technical problem of membrane surface crystallization degree, present invention employs and set up cooling system in Leng Guchu, overcome The cooling of diaphragm two sides is not inconsistent in prior art, and rate of cooling so as to cause inside crystalline polamer easily occur, affects more slowly Follow-up stretching.

The technical solution used in the present invention is：A kind of diaphragm chiller, is characterized in that the diaphragm chiller by cold Drum 70, die head 80 and diaphragm cooling system are constituted, and the die head 80 is located at the top of cold drum 70, what the die head 80 flowed out Diaphragm 60 is formed along cold drum 70 in viscous state melt, the cooling system is located at the opposite side of diaphragm 60.

The diaphragm cooling system 16 have air inlet system 10, heat-exchange system 20, hose connection 30, it is mobile unit 40, leeward System 50 is constituted, and the air inlet system 10 connects heat-exchange system 20 by pipeline, and the mobile unit 40 passes through hose connection 30 With heat-exchange system 20, its opposite side is connected with leeward system 50.The mobile unit 40 is made up of support 41, roller 42, described Roller 42 is installed on support 41.The leeward system 50 by plenum chamber 51, go out air compartment 53, return air inlet 55, the structure of pipe valve 56 Into the plenum chamber 51 is installed by homogenating plate 52, and the outside of the homogenating plate 52 is provided with out air compartment 53.Go out air compartment 53 described in being located Outside be provided with the plenum chamber 51 that slit spout 54 is located homogenating plate 52 be installed.

The invention has the beneficial effects as follows：

Using technical scheme provided by the present invention, change the defect of conventional diaphragm cooling technique, using mobile device The form of formula diaphragm cooling is circulated, cooling medium is recycled, and reduction workload is time-consuming, improves rate of cooling fast Slowly, surface temperature uniformity, overall operation stability, so as to improve cooling work efficiency, improve productivity ratio.

Description of the drawings：

Fig. 1 is diaphragm chiller front view of the present invention

Fig. 2 is cooling system air outlet front view at the cold drum of the present invention

Fig. 3 is slit spout schematic diagram of the present invention

In Fig. 1, in Fig. 2 and Fig. 3：

10. air inlet system, 20. heat-exchange systems, 30. hose connection, 40. mobile units, 41. supports, 42. rollers, 50. back ofs the body Wind system, 51. plenum chambers, 52. homogenating plates, 53. go out air compartment, 54. slit spouts, the pipe valve of 55. return air inlet 56,60. diaphragms, 70. cold drums, 80. die heads

Specific embodiment：

Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but protection scope of the present invention can be by weighing Profit requires the various different embodiments for limiting and covering.

Below with specific embodiment introduction in Fig. 1, Fig. 2, Fig. 3：A kind of diaphragm chiller is in the side of cold drum 70 Be provided with diaphragm cooling system, above cold drum 70 equipped with can in viscous state melt flow out die head 80, the die head 80 with Die head seat is connected, for the melt flow that flows out after raw material is melted to cold drum 70, by control the width of the outlet of die head 70 come The thickness of control diaphragm 70.Take and be followed by heat-exchange system 20 in air inlet system 10, by hose connection 30 the He of heat-exchange system 20 Mobile unit 40 connects, and leeward system 50 is provided with the mobile unit 40, and leeward system 50 is used to keep watch to be sent to diaphragm 70, Such that it is able to quick cooling diaphragm 70, the rate of cooling of the both sides of diaphragm 70 is made unanimously, rate of cooling is uniform.Mobile unit 40 is that have Support 41 and roller 42 are constituted, and leeward system 50 is arranged on support 41, when needing to be overhauled at cold drum 70 or other are constructed, Leeward system 50 can be removed by the roller 42 of mobile unit 40, the plenum chamber 51 of leeward system 50, homogenating plate 52, go out air compartment 53rd, slit spout 54, return air inlet 55, pipe valve 56 are constituted, and slit spout 54 and return air inlet 55 are by the way of arranged crosswise.

Circulated air is entered and moved from air inlet system 10, the pipeline after heat-exchange system 20 exchanges heat inside hose connection 30 The leeward system 50 installed on moving cell 40, there is static pressure before air-out, equal wind and guider make blast uniform through plenum chamber 51, Through homogenating plate 52；Air compartment 53 is reached out, through slit spout 54 and then again through 55 times cooling systems of return air inlet, such that it is able to Cooling medium is recycled, the cold drum for being connected with cooling medium that the melt in viscous state is rotated in average rate is flowed out by die head 80 It is quickly cooled on 70 below its vitrification point and forms the diaphragm in uniform thickness 60 of glassy state.Cooled down by a kind of diaphragm Device, preferably realizes diaphragm rapidly and uniformly refrigerating function.Diaphragm inhomogeneous cooling is solved in process of production, is affected follow-up After drawing process and stretching the problems such as the quality of product.

Claims

1. a kind of diaphragm chiller, is characterized in that the diaphragm chiller is cold by cold drum (70), die head (80) and diaphragm But system is constituted, the die head (80) positioned at the top of cold drum (70), the die head (80) flow out in viscous state melt along cold Drum (70) forms diaphragm (60), and the cooling system is located at the opposite side of diaphragm.

2. a kind of diaphragm chiller as claimed in claim 1, is characterized in that the diaphragm cooling system (16) by air inlet system System (10), heat-exchange system (20), hose connection (30), mobile unit (40), leeward system (50) are constituted, the air inlet system (10) heat-exchange system (20) is connected by pipeline, the mobile unit (40) by hose connection (30) and heat-exchange system (20), Its opposite side is connected with leeward system (50).

3. a kind of diaphragm chiller as claimed in claim 2, is characterized in that the mobile unit (40) by support (41), rolling Wheel (42) composition, on the support (41) roller (42) is provided with.

4. a kind of diaphragm chiller as claimed in claim 2 or claim 3, is characterized in that the leeward system (50) has plenum chamber (51), go out air compartment (53), return air inlet (55), pipe valve (56) to constitute, the plenum chamber (51) is installed by homogenating plate (52), institute State homogenating plate (52) outside and air compartment (53) is installed out.

5. a kind of diaphragm chiller as claimed in claim 4, is characterized in that going out on the outside of air compartment (53) to be provided with described in place Slit spout (54).

6. a kind of diaphragm chiller as claimed in claim 4, the plenum chamber (51) that it is characterized in that being located is provided with equal wind Plate (52).