1. What are the types of paper tray raw materials?
Answer: The more common ones are divided into two categories; one is raw paper pulp (such as: raw wood pulp, bamboo pulp, sugarcane pulp, straw pulp, etc.). The second category is the recycling category (such as: corrugated paper, newspaper, white edge paper). In addition, it is also useful to produce colored paper tray products with different color base papers according to customer requirements.
2. Why are the weights of the paper tray products inconsistent?
Answer: One is that the pulp consistency is changing. When the prepared pulp with a certain concentration is produced during the production process, as the formed paper support leaves the forming machine's pulp tank, the pulp concentration begins to change, and is generally controlled between 2.56% and 3.6%. The second is that the vacuum is constantly changing. In the molding process, the negative pressure value of the negative pressure tank loaded by the air compressor is also variable as the production progresses. The superposition of the two variables causes the weight of the paper tray formed by the same suction time to vary between ±10%.
3. Why can't you or can't do the color I need?
Answer: In the dyeing of paper support products, water-based dyes are mostly added in the pulping process based on the original pulp. One is that the concentration of the slurry also changes as the production progresses, and the second is that most dyes are sensitive to temperature. (During the drying process, the color changes with the temperature of the drying line, and the temperature of the mold is 150°～250° during hot pressing and the dye will also change at different temperatures). In summary, products with higher color requirements should not be dyed.
4. Why isn't your product as smooth and clean as that product?
Answer: After the paper support product is formed, it will be deformed after being fully wet and dried, and then use the high temperature (150°～250°) and high pressure (3T～50T) of the plastic mold to restore the original designed geometric shape, due to the plastic mold The upper and lower molds are vertically stressed, so the plane position is strong, the paper holder appears smooth, and the inclined surface is not easy to receive force and appears slightly rough. According to the actual requirements of product design, the smaller the slope, the more ribs, the smaller the plane, and the more spherical arcs, the more smoothness will decrease after shaping. This is the result of the process.
5. Why are there slight cracks on the surface of this product? Answer: When the paper pallet product is formed, the pulp fibers will naturally gather together layer by layer. The liquid pulp will not flow out in some grooves, which will cause the thickness of the different positions of the paper tray to be different from the design standard thickness after drying. Then, when the paper disc is squeezed by a strong external force during the high pressure forming process, the outermost fibers with uneven inner and outer thickness will break, and small cracks will appear from the surface. This phenomenon will not affect the strength of the paper tray packaging, so it is acceptable in the industry. 6. Why can't I add a button to fix my product? Answer: When forming and shaping paper tray (pulp molding) products, the upper and lower molds are closed, and there must be a certain draft angle. During molding, the wet product cannot be taken out of the mold, so the paper holder cannot be designed as an inverted buckle position. 7. Why are there uneven burrs around the flanging product? Answer: Flanging structure products are formed with flat edges. When a vacuum is formed and the pulp is naturally absorbed, the edge of the mold is a stainless steel filter screen. The edges of the gathered pulp fibers after being absorbed will be irregular batt. This is due to an uncontrollable process. After forming and flanging, the burr will turn to the side, will not affect the packaging, and will not be used as a production control element in the industry. If customers have high requirements for this, they can use trimming and die-cutting to remove burrs. 8. Why do you want to set a minimum order quantity? Answer: The production of paper trays needs to go through pulping, forming, mold assembly, mold debugging, drying, and mold forming for about half an hour. Too little quantity will lead to a substantial increase in production costs. In addition, paper tray products are low value-added products, and too few quantities will result in a substantial increase in transportation costs. Therefore, a minimum order quantity should be established. 9. Why can't you design according to my size? First of all, it is; the size is too large, the length and width limit of commonly used machines in the industry is 800 mm × 600 mm, special models: 1500 mm × 1500 mm
1200 mm. If it exceeds this size, it cannot be produced. The second is: the design size is too small, and the paper clip is designed to cushion the impact of the structure. Is necessary
The structural design must have a certain amount of space. 10. Why is this feeling less difficult than that? Answer: The basic principle of paper clip anti-vibration buffer is realized by the ring structure and the position of the stiffener. Therefore, different design structures of the same pulp will have different shock-proof strength and different hand feeling. The same type of mold will use different pulps. Due to the different fiber length and shrinkage characteristics of the pulp, the hand feel will be different. Therefore, before selecting raw materials and design schemes, we should let engineers know the seismic standards that need to be met, so that different ring structures and reinforcement locations can be designed according to seismic requirements. 11. Why can't this mold be modified anymore? Answer: For paper products, we need customers to provide accurate packaging requirements and accurate dimensions of each packaged product before opening the mold. Preliminary design work should be sufficient. After the mold is completed, the cavity of the forming mold is hollow, the standard thickness is 10 mm, so the modified size should be less than 10 mm. If the size of the prototype cavity is too large to be changed, due to the lack of material in the upper or lower mold, The plastic mold cannot be modified. 12. Why is the abbreviation of paper clip "MPP"? Pulp molding, English name: Pulp molding packaging, referred to as MPP, commonly known as paper tray. 13. Why is this mold not as smooth as the original product after modification? Answer: After the financial turmoil in 2008, the mold cavity of the general paper pallet factory was basically CNC machined and completed as a whole. The modified position is manually modified. The position accuracy after modification is lower than that of CNC machining, so the position before modification will not be smooth.
14. Why has the delivery length (width) increased? Answer: When producing packaged paper tray products, the products will be stacked and packaged due to the inclination of the paper trays. After being placed, the products of the transportation department will become wider and wider due to stacking. However, another advantage of the deformation and springback of the paper support is that the larger size product is not affected in actual use, and the original design size can be