Analysis and Comparison of Honeycomb Paperboard Production Process

The main analysis points: 1, the core; 2, gluing; 3, stretching; 4, composite; 5, compaction; 6, cutting; 7, splicing; 8, special treatment; 9, heating and drying; cut.

As a new type of green environmental protection material, paper honeycomb composite materials will be increasingly used due to the continuous improvement of environmental protection requirements, the continuous expansion of the use of the market, the continuous improvement of process performance, and the continuous upgrading of equipment manufacturing levels. The market prospect is very broad.

At present, there are two main aspects that restrict the development of paper honeycomb composites: one is the problem of moisture-proof and waterproof; the second is the imperfection of production equipment performance and production technology, and the failure to follow-up the development of follow-up equipment of cellular products. There are two ways to solve the problem of moisture-proof and waterproof: First, it will be improved with the continuous development of moisture-proof technology; second, the reduction of the use conditions and the continuous improvement of the application environment will be solved, such as one-time use, container transportation, not Open storage etc. The imperfections of production equipment and production processes mainly refer to unstable product quality, low production efficiency, and excessive material waste. These points will be solved as soon as possible due to the promotion of market development and continuous efforts of production equipment manufacturers.

Today here, I worked as a technical engineer in the carton machinery industry for more than ten years. In 1998, I participated in several honeycomb paperboard industry conferences, and later participated in the design and development of several honeycomb paperboard equipment. , A bit shallow understanding of the production process of honeycomb paperboard, and deeply feel that an ideal device must have a good technology. Honeycomb cardboard equipment is not too high-tech, it depends on whether the technology is advanced, the design is perfect, and many of its technologies are the same as or similar to corrugated board technology. Here, I would like to initiate an immature opinion on the production process of honeycomb paperboard. In order to help the product manufacturer's product development work and use the user's understanding of the device, it is helpful and inspiring. First of all, make a statement, do not comment on any manufacturer's equipment, only give a little opinion on the production process of honeycomb paperboard, there are deficiencies, we also hope that we will give more criticism and jointly promote the development of China's honeycomb paperboard industry.

Honeycomb paperboard production process (referring to the adhesive molding process), there are three forms as a whole: 1, single-machine operation type; 1 zero-page paper type single-sided glue type double-sided glue type; 2 roll paper type; 2, unit operation type ; 3, production linkage line type; 1 core system board separation type; 2 core system board connection type (can also be a separate core system);

First, the core (the main difference between the manufacture of honeycomb paperboard manufacturing process core): 1, winding: a layer of double-sided glue and the offset of the original paper with another layer of raw paper with the winding method to form a paper core, Then cut by the paper cutter, there are eight corners and line turn-style. Features: 1The process is easy to realize; 2Gap operation, the brake device is needed; 3Difficult and constant tension operation is difficult; 4paper pellets are difficult to fast dry; 5Restricted by the paper cutter; 2, Cascade type: 1, Zero page paper type: Laminate the spliced ​​paper sheets; 2. Roll paper type: After two-layer, four-layer, and six-layer paper glues are composited, they are cut and laminated to form a paper core block, which is then cut into core strips by a paper cutter. Features: 1 Zero-sheet paper type easy to realize; 2 Convenient for continuous production; 3 More complex design (referring to continuous production); 4 Paper pellets are difficult to quickly dry; 3, Paper-splicing type: Four, six layers of raw paper glue Composite and then cut into horizontal strips to stick together to form a continuous paper core features: 1 no paper pellets, no paper cutter; 2 easy to continuous production; 3 is difficult to stabilize high speed; 4 wasted;4, continuous strip type: will The four-layer and six-layer glues are compounded and then cut into longitudinally continuous paper strips to stick together to form a continuous paper core. Features: 1 No paper pellets, no paper cutters; 2 Easy continuous production; 3 Paper core width Paper core thickness changes; 4 waste is small;

Second, gluing: glue process: 1, wick bonding; 2, wicking docking; 3, cardboard composite; gluing method: 1, spray glue: the glue machine or glue pump to spray glue to a certain pressure The way to the sizing office. Features: 1 easy to change the type of honeycomb; 2 simple structure; 3 glue amount should track the speed change. 2. Gluing: A gluing method that uses a rubber roller to transfer the glue to the sizing surface. Coating method: 1, dipping type: gluing roller directly immersed in the glue. The feature is a simple structure. 2, quantitative roller transfer type: the use of quantitative roller glue liquid transfer to the roller. The feature is that the amount of glue can be adjusted and the structure is complicated. 3, anilox roller type: the use of pit nets to contain glue. Features are more plastic and not easy to throw rubber. Gumming form: 1, longitudinal glue: the use of rubber roller ring groove or glue head along the direction of the base paper coating bar glue. The feature is that it is suitable for high speed, easy to guarantee the glueing position, and the width of the paperboard is limited by the width of the base paper. Applicable to winding, stacking, paper-making and other core-making system. 2. Horizontal gluing: Apply a horizontal grooved strip glue on the base paper with longitudinal grooves or longitudinal ribs of the gluing roller. Features: 1 If it is not limited by the cutter, the width of the paperboard is not limited by the width of the paper; 2 the paper speed and glueing speed need to be controlled synchronously; 3 It is easy to throw away glue along the groove at high speed. Suitable for laminating, continuous paper type core making method. 3, full-width coating: There are reticulate type, light roller type; the use of round roller on the original paper coating. It is characterized by a full roll face glue, which is suitable for paperboard compounded face paper coating and plastic coating. No matter which type of gluing, quantitative gluing should be used, and the amount of glue can be adjusted, so as to easily ensure quality and reduce costs.

Third, the stretch: 1, limit the width of the stretch: the use of width restrictions, the core strip open. Features are easy to implement, uneven lateral force, suitable for stand-alone operations. 2, differential stretching: use the speed difference, the core strip open. Traction roller + damping roller type; traction roller + damping plate type and graded combination type. Features: Speed ​​difference can be adjusted, suitable for unit operation and production line. 3. Combination of differential and limit width: It is applicable to the production line where core strips need to be connected. 4. Horizontal stretching: Pulling the paper core strip horizontally, characterized by a change in the speed of the paper during the stretching process, which is suitable for a continuous paper strip production line.

Four, composite: 1, paper core and surface paper compound 1 surface glue: easy to ensure bond, with a large amount of glue, not easy to dry. 2 Glue on Glue: Bonding is not easy to control, with small amount of glue, easy to dry. Now it is generally believed that the quality of the enamel coating is not easy to guarantee. The five elements for ensuring the composite quality of the enamel coating are: 1 selecting the right glue type; 2 proper gluing method; 3 the stability of the relative position when the paper and quilt are compounded; 4 applying a certain pressure when compounding; Composite temperature should be added when appropriate; 2, paper core and other sheet composite (also known as hard-plate composite) cold-pressed composite (abbreviated); hot-pressed composite (slightly);

Fifth, compaction: refers to the process of applying a certain pressure when the paper bonding, in order to make the bonding effect is good, generally need to be compacted. Processes to be compacted are: 1 paper core bonding; 2 core bar butt; 3 cardboard composite; compaction: 1, press compaction: 1 positioning compaction; 2 beat compaction: several presses press a certain beat pressure In fact, it is mainly used in core board. 2、Squeeze: The splicing of the sliver butt and the butt of the paper shall be carried out by extrusion. 3, roller compaction: 1 continuous roller compaction, characterized by pressure jump, applied to composite and core strip bonding. 2 Transfer belt combined with the pressure roller. It is characterized by relatively stable pressure changes. Apply pressure horizontally: Apply to paper sticks; Apply pressure vertically: Apply to cardboard composites;

6. Cutting: Refers to the process of cutting multi-layer bonded composite paper or paper pellets into paper strips or paper core strips. Bonded honeycomb paper cores are cut into strips and finally bonded into paper cores. There are three methods: 1. Cutting of the paper cutter: Using a paper cutter to cut the paper pellets into strips. It is characterized by the positioning of intermittent cutting, cutting force is large, cutting thickness and cutting efficiency are limited. Application of a core making process that forms a paper pellet first. 2. Round knife slitting: Use a round knife to slit the paper longitudinally. Features continuous splitting during operation. Applied in continuous paper strip core making process. 3, single-stroke knife cutting: the use of a single punch knife to cut the paper on the knife anvil horizontally. Features are rapid die cutting. Applied in paper-strip coremaking process.

Seventh, splicing: Refers to the process of butt jointing and sticking of paper core strips. Core bar butt joint: The paper core bar is continuously bonded by extrusion, characterized by the uneven force of the adhesive surface, which is applied to the core making process that needs to form a paper core block. Paper sticking sticky: 1, horizontal stripe sticking: use sticking to stick together the sticky note, applied to the sticky butt jointing core making process. 2. Longitudinal paper sticking and sticking: The continuous paper strips are adhered together by continuous roller extrusion, which is characterized by uninterrupted paper strips and pressure applied horizontally and applied to a continuous paper strip core making process. Splicing methods: 1. Manual splicing; 2. Semi-automatic splicing; 3. Automatic splicing (core splicing, note gluing)

VIII. Heat Drying: Bonding, moisture discharge, and the shaping of paper cores all require heating during the production of honeycomb paperboard. Introduce several heat drying methods used in the production of honeycomb paperboard. Three heating methods: 1, electric heating: far infrared and microwave drying. Features are easy to control, large energy consumption and high cost. 2. Steam heating: A heating method using steam as a heating medium. It is characterized by soft heating, low temperature limit, and low thermal efficiency, involving pressure vessels. 3, heat transfer oil: the use of heat transfer oil as a heating medium heating method. The feature is a wide range of heating temperature, small heat loss, does not involve pressure vessels, can not use the boiler room.

Nine, vertical and horizontal cut: Refers to the longitudinal slitting and transverse opening of the board. Slitting: all round knife high-speed slitting. (Multi-knife slitting and double-knife edge cutting) Cross-cutting: Multiple toothless round knives are used, and the size of the car is controlled synchronously by walking. Control mode: 1 computer control; 2 work program control; walking: 1 motor, gear rack type; 2 motor, chain type; 3, pneumatic type; synchronization: 1 cardboard drag type; 2 motor + cardboard;

X. Special handling: There are roughing treatment, exhaust treatment, and increased contact surface treatment. 1. Hair treatment: refers to a method of grinding a rough surface on the surface of a paper core. There are horizontal and vertical hairs (in terms of fiber direction), the longitudinal hair effect is more obvious. Uses: 1 to adjust the vertical height error; 2 to increase the surface dipping ability; 2, exhaust treatment: in the cardboard composite to increase its permeability and take the treatment. Slotting and bleed air disposal are now deprecated. 3, increase the contact surface treatment: to strengthen the composite bond strength and take the approach. There is a water slumping method (characterized by increased process and energy consumption, reduced board thickness) and increased glue spread to extend the dipping time (increased costs and reduced board thickness). (late power)

 

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