Understanding and difference of common quality defects in glass containers

[Zhongbo.com] 1. Serious defects:

Harm to personal safety, such as: collapse, broken glass inside the bottle. The customer is not working properly. Such as: severe deformation, lack of mouth.

Sticky wire inside the bottle: also known as the phone call: there is a glass wire in the bottle opposite to the surface.

Sticky glass on the outside of the bottle: The glass on the outer surface of the bottle is usually quite sharp. That is, after the hot end is formed, the bottle is heated, and the two bottles are in contact with each other to adhere. Separate after the cold end.

Sticky glass in the bottle: The three defects of the punch and the spike in the bottle are generated when the hot end is formed. The stick glass in the bottle means that the glass piece falls into the bottle and sticks to the inner surface of the bottle, but it may Appeared in the bottle. There is a small sharp glass bulge on the inner wall of the head of the punch. A spike in a bottle means that a glass on the inner surface of the bottle protrudes sharply, usually near the bottom of the bottle.

Crack on the inner wall of the bottle (internal crack): The inside of the bottle is covered with cracks of any length and width, the width of which allows the nail to enter. It has the same shape as the crack line. It is listed as a serious defect because it appears in the bottle body. When some products are required to be autoclaved or filled with air-filled materials, the cracks are dissipated and the glass is broken, which is dangerous to people.

Spurs at the mouth (internal and external double mouth), burrs on the inside of the bottle mouth (burrs of the bottle mouth):

The inner diameter of the bottle mouth is convex, and a piece of annular glass belongs to the outer double mouth, often accompanied by an increase in the height of the bottle or an inequality of the bottle mouth. Inside the bottle mouth: There is a small piece of glass protruding from the edge of the inner diameter of the bottle mouth. The two defects affect the sealing of the cover and cause the crushed glass to fall into the bottle.

Thin air bubbles (broken bubbles): The air bubbles inside and outside the bottle or on the sealing surface of the bottle mouth. Because they are too soft, they will be broken when the bottle is used normally, and can be worn with a fingernail.

Molding mold: a high flying shovel protruding from the seam line of the bottle.

Insufficient mouth: insufficient molding at the top of the bottle.

2, bottle mouth defects

Flange of the bottle mouth (bump edge) and die damage: the glass piece protrudes horizontally from the outer edge of the bottle mouth. Mold damage: a small piece of glass protrudes from the joint line of the mouth and the sealing surface and the initial mold, and the vernier caliper is used to measure the defect, which usually causes the outer diameter of the mouth to exceed the standard or affect the smoothness of the automatic cover. .

Bottle mouth crack (deep explosion), fine crack on the sealing surface of the bottle mouth (shallow explosion): The deep explosion mouth is different from the shallow explosion mouth, it bursts deeper, and the crack often extends from the inner edge to the outer edge, and the shallow explosion is A shallow crack at the top edge of the bottle mouth. To reflect the crack in the light, you can see the crack reflection. Therefore, it is easier to miss the inspection. Products with high sealing requirements, such as beverage bottles, chicken essence bottles, bird's nest bottles, etc., after filling and capping with shallow blasting bottles, after three or five days, the vacuum safety button will be raised, leaking, and inside the bottle. Things will deteriorate.

The recess (notch) in the bottle head is also called "transparent tooth"

The inner diameter of the bottle mouth is too large. Through the teeth: the glass on the inner wall of the bottle mouth is obviously unevenly distributed and deformed. In the touch port, it is obviously felt to be inwardly concave. The inner diameter of the bottle mouth is too large: the inner diameter of the bottle mouth is larger than the design requirements. Both types of defects can cause leakage when used in some internal plugs.

The mouth of the drum and the mouth of the bottle are too large: the mouth of the mouth refers to the mouth of the bottle. The bottle mouth ring is too large: the bottle head size exceeds the standard upper limit. The drum mouth will also cause the bottle head size to exceed the standard. The cause is caused by improper operation, and the mouth is too large is the reason for the mold.

The bottle mouth is cracked, and the bottle mouth is defective: the bottle mouth ring defect and the bottle mouth thread defect are collapsed due to the impact. It just shows up in different locations.

Bottle mouth crack (explosion) and explosion thread: The bottle mouth crack is a crack in the middle of the bottle head, and the thread is a crack between the threads of the screw bottle. The crack at the mouth of the bottle ring (burst ring) and the crack under the mouth of the bottle (explosive chin) are below the ball ring at the lower edge of the bottle head. The blasting chin is a crack under the ball ring and the neckline seam line or its vicinity.

The bottle mouth is rough (gross): the surface of the bottle mouth is rough due to the poor finish of the mouth mold. For some products with strict quality requirements, it is not allowed. Example: Vital bottle, beer bottle.

Disc mouth, bottle mouth is not flat, bottle mouth tilt: due to the mouth is not full, the inner edge of the bottle mouth is straight, like a rabbit's lips, often accompanied by insufficient mouth or uneven mouth. The bottle mouth is not flat: the standard between the high and low points of the mouth of the bottle exceeds the standard. This defect must be detected by the ribbed feeler, and the bottle mouth is inclined: that is, the parallelism exceeds the standard, and the difference between the large value and the small value of the bottle mouth surface to the bottom of the bottle exceeds the standard requirement.

Insufficient thread and bottle mouth ring is too small: the thread of the bottle mouth is insufficiently formed. In severe cases, the outer diameter of the thread is too small, and the bottle mouth is not too small: the size of the bottle mouth is smaller than the standard lower limit.

3, bottleneck defects

Clamping cracks (clamping) and bottleneck cracks (blasting neck): The crack caused by the pliers is shaped like a crescent and appears at the bottom of the meson. A burst neck is a crack in the bottleneck, usually a horizontal crack.

Bottle neck folding, neck grabbing, bottle neck/neck collapse: obvious deep creases on the glass surface, usually in the bottleneck. The neck is the bottleneck deformation, and the shoulder and neck collapse refers to the bottleneck or the shoulder blowing.

Neck and body: The neck is not straight, affecting the parallelism index. The height of the bottle is measured by the height gauge. The difference between the bottom and the high point can be used to judge the degree of the neck. The whole body; the deviation between the center line of the bottle mouth and the vertical line in the bottom of the bottle, the vertical axis turntable can detect the body, and the height ruler cannot be used.

4, bottle body defects

Explosive body, shallow body: a short and deep crack, the surface of the hot bottle after molding is in contact with cold objects such as metal, and the crack is reflected. Shallow explosion; shallow crack on the surface of the glass, the length of the crack is not fixed, does not penetrate deep into the glass, and does not reflect light.

Bottle crack line: an open crack in the outer surface of the bottle. Feel the hand.

Cold mold: Because the mold temperature is too cold, the outer surface of the glass is rough, the glass is unevenly distributed, and the hand touches the unevenness.

Wrinkles: Small horizontal wrinkles on the outside of the bottle, the shape of which is more horizontally dense.

Crease: A slight crease on the glass surface. Usually such creases are nearly horizontal.

Blank printing: The glass impression formed by the blanking in the upper part of the bottle. There may be bubbles around. Its shape is irregular.

Bottle body depression: After the bottle is formed, the bottle wall is squeezed to form a visible or inconspicuous depression. The bottle is out of roundness or the diameter of the bottle is too small.

Small bottle body: The overall diameter of the bottle body is smaller than the standard lower limit value, which may result in unqualified capacity or labeling.

Hot mold crack: usually appears in the bottle body. Shaped like a seagull.

Explosive suture: A crack that usually appears in the body of the bottle at the seam.

Burst shoulder: a vertical crack in the shoulder of the bottle.

Deep root crack: deep crack at the root of the bottle.

Initial mold damage: A sharp glass is sunken outside the bottle.

Mold damage: glass protruding from the outside of the bottle.

Blasting letters: There are shallow cracks extending outwards around the lettering.

Explosion positioning: locate the crack around.

5, the bottom of the bottle

Crack at the bottom of the bottle: shallow crack at the bottom of the bottle.

Blasting bottom: deep cracks in any direction of the bottom of the bottle, a large number of radial.

Concave bottom: The center of the bottom of the bottle is an irregular recess.

Bottom: The center of the bottom of the bottle protrudes outward, and the bottle is placed on the flat plate and is not swayed.

The bottom of the bottle is not flat: due to the deformation of the bottom of the bottle, it is unstable on the plane. Swinging unevenly.

Mold damage: due to damage to the bottom mold, the glass at the bottom of the bottle is raised.

Bottom line: The glass penetrates into the joint between the forming die and the bottom mold or forms a cornice due to poor fit of the mold bottom.

The head line is not correct: the bulky line is not at the center of the bottle, but goes to the side.

Bottom bottom: The inside of the bottom of the bottle is inclined, but the inclination exceeds the specified requirements. Usually the ratio of the bottom is 1:2mm control.

Thin bottom: The bottom glass is insufficient, which can not reach the thickness required by the design, and sometimes the bottom will also lead to a thin bottom.

6, the stitch line defect

Joint line crack (explosive stitch): A vertical crack at the molding die line. Its shape is different from that of a hot mold.

Poor initial molding of the suture: the iron bowl line of the bottle is convex and sharp. After molding, the initial mold line is sunken.

Forming the hem of the stitching: The bulge is formed at the joint of the mold, which is opposite to the shape of the splicing line of the initial mold.

Forming wrong stitching: the two halves of the forming die are not well matched, and the stitching line is stepped. One high and one low.

The boring head is too deep: the glass enters the initial mold and the boring head to form a distinct zigzag stitch. Visual inspection found that the bulkhead line was obviously sunken

Bulk head hairs (rotten head line): in the dull head and the iron bowl with a convex jagged head line.

Bottle mouth / initial molding stitching burr: The joint between the mouth and the iron bowl is not smooth to form a convex, stepped or serrated stitch.

7, measuring defects

The bottle is too large: the bottle diameter is outside the standard upper limit. When the bottle is sunken, it may cause the diameter of the body to be too large.

Bottleneck blockage (narrow neck): The inside diameter of the bottleneck is less than the specified requirement. Some products indicate the effective length of the inner plug on the design drawing according to the customer's filling pipe requirements. If a narrow neck is present, it is not acceptable. Products that are not specifically required shall be judged by visual inspection.

Inner ring of the bottleneck: the bottleneck or the glass concentric ring on the body of the bottle.

The inner diameter of the bottle mouth is too small: the inner diameter of the bottle mouth is smaller than the specified requirements. It can be measured with a plug gauge or a vernier caliper. The inner double port may cause the inner diameter of the mouth to be small.

Super high: the bottle height exceeds the standard upper limit, and the bottleneck may also cause the bottle to exceed the standard.

Bottle short: The height of the bottle does not reach the standard lower limit, and the bottle shrinks too much or the bottom of the bottle will produce a short bottle.

The bottle is not round: Ellipticity is a deformation of the bottle from circular to elliptical, usually expressed by the difference between the long and short axes of the ellipse. That is, the difference between the large value and the small value of one rotation of the same initial measurement surface exceeds the standard range of the bottle body out-of-roundness.

The bottle body is convex: the bottle body is deformed and protrudes outward beyond the specified requirements.

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