For most manufacturers of glass wine bottles, after the products leave the factory, they will receive various product quality problems from customers every year, causing customers to complain and causing losses to both parties. Reasons for imputation: mainly due to improper quality control during the production process. Here are some brief discussions on the key points of quality control during the production process.
1. Mold inspection
(1) For manufacturers specializing in the production of glass wine bottles, most of them produce according to the molds provided by customers, or according to drawings and newly opened molds for sample bottles. For the key dimensions of molds that will affect the molding, they must communicate with customers when opening the mold. Negotiate and reach a consensus on the revision of key dimensions.
(2) When all molds enter the factory, they must match the die, initial mold and finished mold of the mold, and inspect them according to the drawings or customer requirements.
2. First Article Inspection
(1) The first 10-30 products are produced before the mold is put on the machine and before the annealing line, and 2-3 products are selected from each mold for size specification inspection. The inspection focuses on the mouth height and the inner and outer diameters of the mouth; Whether the lettering on the bottom is correct and clear; whether the pattern on the bottle body is correct.
(2) When the bottles just come out of the annealing line, the quality inspection team leader will limit each molded product to 2-3, and conduct inspections in all aspects according to the drawings. The key point is that in addition to the above, capacity measurement is also required. Measure the weight of the material, the inner and outer diameters of the mouth, if necessary, fill the bottle with water, and use the cap provided by the customer as a physical assembly to check whether the cap can be in place and whether there is water leakage. And make internal pressure, internal stress, acid and alkali resistance test.
3. Process inspection
(1) In the case of not changing the mold, every 2 hours, take 2 pieces of each mold for capacity and material weight testing, and also need to check the inner and outer diameters of the mouth, because the mouth mold is easy to be stained with oil during use, resulting in a loose lid. Alcohol leakage occurs.
(2) During the manufacturing process, a new mold may be replaced due to the mold. Therefore, after the mold is changed, the molding workshop must immediately notify the quality inspection workshop, and the quality inspection workshop must make the first piece of the bottle made with the new mold. Inspection and process inspection to prevent quality problems caused by missing inspections due to quality inspections after mold changes.
4. Full inspection
(1) After the products come out of the annealing line, the quality inspectors must conduct a full appearance inspection of all products, the focus of which is:
① Bubbles in bottles: Bubbles are the most likely problem in the production of glass bottles. Most quality inspectors cannot correctly grasp the size during the inspection, such as: bubbles above ∮1mm on the sealing surface of the bottle mouth are not allowed; Body: no more than 6 bubbles below ∮1mm within one square centimeter; no more than 3 bubbles with 1mm<∮<6mm, and the distance between them is more than 20mm; bubbles on the surface are not allowed to wait, it is difficult to grasp , only with films with different shapes for comparison.
② Crooked neck: It is mainly caused by misalignment between the die and the forming die or one side of the die is not completely placed on the forming die during the operation of the operator. It can be solved by requiring the operator to correct the operation. Affects the overall appearance of the bottle, if not the fit with the cap.
③ Sloping bottom: The material at the bottom is uneven, and half of the side is thick, or even more than half, which affects product quality and lowers the bottom product grade.
④ Thickness of the seam line: The seam line exceeds 0.5mm on the surface, and even the feeling of scratching is not allowed, especially on the sealing surface of the bottle mouth. The main reason is that the mold is not in place or caused by wear, which needs to be repaired, polished, polished and combined.
⑤Material color: Generally speaking, the color of the material will not change greatly, unless the ingredients of the raw materials used change, it will generally not change. If there is a phenomenon of turning green or blue, the formula can be adjusted appropriately to remove the color.
⑥The inner and outer diameter of the opening and the appearance of the notch in the opening: the inner and outer diameter of the opening and the door are most prone to problems. Outer diameter: Because the die is easy to be stained with oil during use, the anti-slip teeth become smaller, and the lid slips left and right, which cannot be tightly sealed; there is a notch in the bottle mouth, and the inner plug of the lid cannot be tightly inserted, which will lead to wine leakage. The main reason is that the material is too soft; or the core pulling speed is too fast after the material enters the initial mold, and the material is not fully formed; it may also be that the core is too short, which can be solved by lengthening the core appropriately.
⑦ Seat material (bottle deflection): The main reason is that the material is too red (too high temperature), not completely cooled, and the particles are seated after molding. It may also be that the molded product is not placed in the center of the bottom. Sincerely.
⑧ Thin shoulders: Generally, square bottles are prone to appear, because the mold design is such that it mainly depends on the soft material movement and timing (material color) grasp of the operation, and strictly prevents dead ends from running out of materials, resulting in thin shoulders, so that inspection is difficult to grasp, and transportation on the way Or pouring wine, large damage in sales, resulting in losses. During the inspection, a rubber hammer can be used to lightly tap the shoulder part, and if any problem is found, report it immediately so that it can be corrected.
⑨The bottle body is not bright: the bottle body is numb, foggy, and the transparency is not good. The main reason is that after the mold is molded with a release agent during molding, there is a layer of carbide on the inner surface, which can be finely polished.
⑩Material: There is a lot of hemp material on the bottle body, mainly because the temperature of the pool furnace is too low, the material is not fully cooked, or the speed of the feeding machine is too fast, it can be solved by reducing the machine speed, reducing the output, and ensuring the temperature of the molten material in the pool. .
5. Inbound random inspection
The quality management personnel will sample the batches of finished products that have been packaged and wait for storage according to the AQL counting sampling plan. When sampling, try to sample from all directions (upper, middle, and lower parts), and strictly follow the standards or customer requirements when inspecting. Qualified batches are immediately put into storage, stacked neatly, and marked clearly; unqualified batches must be immediately marked, isolated, and required to be reworked until they pass the random inspection.
6. Inspection of roasted flower processing bottles
(1) The color turns red: the main reason is that the temperature is too high, the speed of the mesh belt is too slow, and the added color remover undergoes a reduction reaction.
(2) Poor adhesion of flower paper: In addition to the material of flower paper itself, it is mainly caused by low temperature. Due to different materials of flower paper, the temperature required for flower decoration is different. Therefore, adjustments must be made when baking flowers.
(3) Blistering of decals: There are many holes in the baked bottle decals. The reason is that after the decals are pasted, the air bubbles in the decals have not been brushed off, or the water on the surface of the decals is not dry, so bake the flowers immediately. due to. For products that have been baked but unqualified, dilute hydrochloric acid can be used to scrape them off, and then bake them again.
(4) Mixed packaging of different degrees: Because the bottle type is exactly the same, the decals are exactly the same except for the degrees. When decals, decals, inspections, and packaging, it is easy to mix bottles of different degrees, which will cause customers to complain. quality accident.