CN202116940U

CN202116940U - Calendar

Info

Publication number: CN202116940U
Application number: CN2011201720694U
Authority: CN
Inventors: 刘波
Original assignee: Gold East Paper Jiangsu Co Ltd
Current assignee: Gold East Paper Jiangsu Co Ltd
Priority date: 2011-05-26
Filing date: 2011-05-26
Publication date: 2012-01-18
Anticipated expiration: 2021-05-26

Abstract

The utility model discloses a calendar, which comprises a frame, an upper roller, a lower roller and a heating system, wherein the position of the upper roller or the lower roller is fixed, and the heating system is used for heating the roller edge of the upper roller or the lower roller which is fixed in position to improve the clearance evenness between the upper roller and the lower roller. Compared with the prior art, the calendar utilizing the heating system for heating the roller edge enables the clearance at two ends of a roller group to be decreased according to the thermal expansion principle, so that firstly, the clearance evenness between the upper roller and the lower roller is improved, swelling of paper is restrained, effective breadth of a paper web can be increased, and the return rate is decreased, and secondly, paper breaking times can be reduced, operating efficiency of equipment is improved, and paper breaking quantity is decreased. Besides, loss such as deterioration in quality caused by paper web dead lines can be reduced and the like.

Description

Calender

Technical field

The utility model belongs to field of papermaking, relates to a kind of paper making equipment, is specially a kind of calender of paper being done the press polish processing.

Background technology

Modern paper technology is particularly made art paper and is all comprised steps such as oven dry, coating, press polish usually.In order to ensure being coated with successfully, also paper is carried out precompressed light earlier, possibly occur repeatedly press polish in the promptly whole paper-making process and handle.Wherein press polish is that smoothness of paper, glossiness, tightness and thickness etc. are carried out ornamenting, so that paper thickness, gloss etc. are more even.The step of press polish is accomplished by calender usually.Industry calender commonly used has soft press-polishing machine and supercalender at present.No matter which kind of calender is formed by several rollers, vertically superposed being installed on the frame.Paper extends through the gap between these rollers, thereby produce friction between roller paper is carried out the press polish processing.

A kind of supercalender that industry is used at present; The nip action on its inner both sides is owing to receive the constraint of mechanical structures such as fixed hub; Cause the gap between the roller bigger in the middle part of roller on the roller limit; Make the paper dual-side produce swollen limit so easily, and the paper on swollen limit must be in the back segment operation disallowable copying back.Paper produces if any swollen limit in addition, causes paper in the back segment operation, to produce dead line and disconnected paper easily, causes production efficiency low, and cost increases.

Summary of the invention

In view of this, be necessary to provide a kind of calender, this kind calender can avoid paper to produce swollen limit phenomenon.

The purpose of the utility model realizes through following technical scheme:

A kind of calender; Comprise frame and be arranged on top roll and the lower roll on the frame; And heating system, the fixed-site of any roller in top roll and the lower roll, this heating system heats to improve the clearance evenness degree between top roll and lower roll the roller limit of any roller of fixed-site in top roll and the lower roll.

Compared with prior art; The utility model calender adopts heating system pair roller limit to heat; Utilize the principle of thermal expansion that the gap at roller group two ends is reduced, thereby improve the uniformity of clearance between roll, and then suppress the swollen limit of paper generation phenomenon; So can increase effective fabric width of paper web, reduce the rate that copies back.Secondly, also can reach and reduce disconnected paper number of times, improve the operational efficiency of equipment and the effect of reduction broke amount.In addition, also can reduce the loss that causes quality of finished reduction etc. because of the dead line of paper web.

Description of drawings

Fig. 1 is the structural representation of the utility model calender one embodiment.

Fig. 2 is the in running order structural representation of the roll structure sketch map of calender down of the heating system of calender shown in Fig. 1.

Fig. 3 is the roll structure sketch map that the heating system of calender shown in Fig. 1 is in calender under the duty not.

The specific embodiment

Below in conjunction with specific embodiment and accompanying drawing the utility model is described further.

As shown in Figure 1, the utility model calender comprises frame (figure does not show), and approximate vertical is provided with lower roll 12 on the frame, the heating system 30 that heat on top roll 13 and pair roller limit.A roller group that constitutes with two rollers in the present embodiment is that example describes the utility model, and wherein lower roll 12 is a drive roll, also is felt wrapped roll, and top roll 13 is a driven voller.In the present embodiment, the position of top roll 13 is set to immobilize.Lower roll 12 laterally arranges with top roll 13, and direction of rotation, and the pressure that produces after the roll surface closure of two rollers can carry out press polish to paper 20 (Fig. 2) to be handled.Lower roll 12 can move the roller shell to the action of hydraulic piston through the roller inner counter, thus the closure between control lower roll 12 and the top roll 13 and opening.

Behind the baking operation,, reach the back operation then and be for further processing before paper 20 (Fig. 2) process in the present embodiment again through the press polish operation of lower roll 12 and top roll 13.Certainly press polish that should the place is the press polish treatment process of paper 20 after through coating also.

Top roll 13 adopts hot-rolling, promptly hard roller, and material is metals such as chilled cast iron.Along the circumferential direction have a series of ducts at roller, can adopt hot water, steam or deep fat heating according to the demands of different of roll surface temperature.

Lower roll 12 adopts the subregion crown controlled roll with a plurality of nips, and process with specific polymers on its surface, high temperature high voltage resistant, and good springiness can bear the frequent variation of load.The material that uses at present mainly contains epoxy resin, nylon, synthetic rubber, polyester urethane etc.

Top roll 13 passes to heat energy in the paper 20, and when being deep into certain critical depth, and at this moment the temperature of paper reaches or near glass softening point, this moment, paper plasticity was strengthened, and lower roll 12 is when pressurized, strain, and its nip contacts with paper 20 formation faces.13 of top rolls are pressed with the forms of pressing mold and are put on the paper of plasticizing, make paper 20 become gloss level and smooth/thickness is even.

Please be simultaneously with reference to figure 2, heat on the roller limit of 30 pairs of top rolls 13 of this heating system, utilizes the principle of thermal expansion that the gap at roller group two ends is reduced.Concrete, heating system 30 is arranged on top roll 13 outsides, and is positioned at top roll 13 tops, and near the outer surface of top roll 13.

Fig. 2 and structure shown in Figure 3 are made comparisons and can know, because the heating of heating system 30 pair roller limits can make the gap length between the roller group reach unanimity, thereby swollen limit 21 phenomenons that 20 sides of the paper shown in Fig. 3 produce have obtained effective inhibition.Calender shown in Fig. 2 is through adopting heating system 30 (with the arrow signal), and the uniformity of the thickness of paper 20 is improved greatly, can increase effective fabric width of paper web thus, reduces the rate that copies back.Secondly, also can reach and reduce disconnected paper number of times, improve the operational efficiency of equipment and the effect of reduction broke amount.In addition, also can reduce the loss that causes quality of finished reduction etc. because of the dead line of paper web.

Please again with reference to figure 1, this heating system 30 adopts electric airheater.

This heating system 30 comprises control panel 31, heater 32 and heating head 33.Control panel 31 is electrically connected with heater 32 through control cable 35.Through operation control panel 31, can set parameters such as the temperature of heated air, air quantity, with the degree of accurate control heating.

The heated air that heater 32 produces is transported to heating head 33 through warm-air pipe 34.Heater 32 communicates with external air source.Preferably also can screen pack be set at the source of the gas place, source of the gas is delivered to heater 32 after filtering again, so can avoid sneaking in the source of the gas impurity to influence the quality of paper.

The roll surface heating of 33 pairs of top rolls 13 of heating head.The quantity of heating head 33 is two, respectively near the two ends of top roll 13, be positioned at top roll 13 roll surface the top and near roll surface, and then to the roll surface at the two ends that are positioned at top roll 13, promptly heat on the roller limit.The width of heating head 33 is between the 1/8-1/12 of top roll 13 length.In the present embodiment, the width of heating head 33 probably is 600mm, and the length of top roll 13 probably is 6700mm.

Heating head 33 is designed to arcuate structure to circular roll surface, and is preferred with the conduction of applying roll surface assurance heat, can also on heating head 33, make equally distributed aperture (figure does not show) simultaneously to guarantee homogeneous heating.In heating head 33 inside temperature probe has been installed also, but sensing temperature and then provide data so that temperature is controlled automatically and adjusted.

The size of warm-air pipe 34, and the various parameters that control panel 31 is set can change according to real needs.The diameter of warm-air pipe 34 is 80mm in the present embodiment.Each technical parameter that control panel 31 is set is following:

Operating voltage: 380V three-phase

Power: 40kw

Add heat density: 4w/cm ²

Design temperature: 110 ℃

Design pressure: 30mbar

Owing to have a plurality of nips in the lower roll 12, these a plurality of nips also can calculate different pressure and make roll surface produce micro-deformation to the thickness of paper 20 zoness of different.If heating system is owing to variable increases, wayward to lower roll 12 heating.Thereby 30 pairs of top rolls 13 of heating system heat and can avoid above-mentioned unfavorable factor.Simultaneously, if disconnected paper takes place, the relative top roll 13 of lower roll 12 meetings is subjected to displacement promptly and moves downward, and scraper cleaning roll surface shredded paper is arranged, and can avoid consequences such as paperboard damage equipment, and the operating space of follow-up paper injection action is provided.30 pairs of top rolls 13 of heating system heat the generation that also can avoid above-mentioned negative consequence.

Certainly also visual in other embodiments demand is set at fixing roller with lower roll 12, and heating system 30 can be arranged on the outside of lower roll 12, the below of the outer surface of heating head 33 close lower rolls 12, thus the place, roller limit of lower roll 12 is heated.Because the relation of position, this heating system 30 has advantage easy for installation, and can not have influence on the operation of roll change.

The calender of the utility model also can be supercalender, can have many group rollers, and every group of roller has one or more felt wrapped rolls.When having many group rollers, a plurality of rollers that are positioned at the diverse location place in every group of roller relatively, the roller that is positioned at the top is called top roll, and the roller that is positioned at the below is called lower roll.These heating system 30 visual real needs heat concrete certain roller or a plurality of roller in many groups roller, to reach the effect of the spacing uniformity between the adjustment roller.

Claims

1. calender; Comprise frame and be arranged on top roll and the lower roll on the frame; The fixed-site of any roller in top roll and the lower roll; It is characterized in that, also comprise heating system, this heating system heats to improve the clearance evenness degree between top roll and lower roll the roller limit of any roller of fixed-site in top roll and the lower roll.

2. calender according to claim 1; It is characterized in that: the heater that this heating system comprises control panel, is electrically connected with control panel; And the heating head on roller limit that is connected and is arranged on any roller of said fixed-site with heater; Said heating head is positioned at the outside of any roller of said fixed-site, and near the outer surface of any roller of said fixed-site.

3. calender according to claim 2 is characterized in that: this heater is connected with heating head through warm-air pipe.

4. calender according to claim 3 is characterized in that: the diameter of this warm-air pipe is 80mm.

5. calender according to claim 2 is characterized in that: this heating head is an arcuate structure.

6. calender according to claim 2 is characterized in that: be provided with temperature probe in this heating head.

7. calender according to claim 2 is characterized in that: this heater is circumscribed with source of the gas, and the source of the gas place is provided with screen pack.

8. calender according to claim 2 is characterized in that: the width of said heating head is between the 1/8-1/12 of the length of any roller of said fixed-site.

9. calender according to claim 2 is characterized in that: the quantity of said heating head is two, respectively near the two ends of any roller of said fixed-site, and all is positioned at the side of any roller of said fixed-site away from another roller.

10. according to any described calender among the claim 1-9, it is characterized in that: the fixed-site of said top roll, this heating system are arranged on the place, roller limit of top roll.