Master mold coating skills to do a good glass bottle tank molding operation craftsman

The lubrication
the molding process of glass bottle cans is the key to the molding process. It plays a vital role in the quality of products. In this paper, several related technical issues of mold lubrication are discussed from the operating point of view, so as to promote the improvement of glass bottle molding process operation technology
the
.
Glass bottle tank industry molding machine speed is getting faster and faster, bottle weight is becoming more and more lightweight, environmental protection requirements are getting higher and higher, for this reason, the mold mold lubrication coating special attention, not only lubrication coating on the inclusion of major improvements, but also in the lubrication coating classification, selection and brushing operation techniques are more and more exquisite.
I mold coating action
(1) lubrication
(2) to prevent oxidation rust
(3) sliding
(4
) uniform heat transmission
(5) cooling

However, to the present foreign mechanical spraying has not been fully promoted.
2
by the use of the site
on its use is divided into: initial mold pre-coated spray coating; Special lubrication coatings for small glass bottles and mouth molds, special mold lubrication coatings for special-shaped, very large glass bottles, special types of products for crack-resistant special rubber agents at bottlenecks and shoulders.
3
according to the performance of the use of
on the performance of its use, but also divided into: for the general speed and general material drop temperature of the mid-range general-purpose mold coatings, there are suitable for medium and high speed (including N.N.P.B method) of high-grade general-purpose mold coatings and many other different grades.
third mold lubrication coating use and operation skills
mold lubrication coating use operation, should be accurately understood as a
operation
."
In
this, in addition to bottle-making machine operators have a strong sense of responsibility, but also should "carefully ponder" the use of operating keys, in a careful observation of the uniform distribution of products and defects, and constantly adjust their operation of the
sweaking parts
and "
brushing order
". For the operation of the bottle-making machine tool body:
1
first must change a concept.the main points of use of
mold lubrication coatings are:
each brush less, the better the bottle finish
, that is, the appropriate amount of lubrication coating accurately painted in the proper position of the initial mold, will produce a smooth and uniform glass bottle, while extending the life of the mold and reduce the cost of comprehensive use. The more you brush, the opposite.
2
to make a brush suitable for the molding process requirements.
the brush is too large will be too much lubrication paint and soil the initial mold, and the brush is too small is difficult to evenly paint. Foreign countries from the production of special brush size to operation and use, there is a set of strict institutional constraints.
3
don't use a sticky brush.
the brush should be immersed in 30 . . . mechanical oil extruded before the first use, and then lubricated paint. And pay attention to the brush to be more old and new, because with a sticky brush will stain the initial mold, each time the brush lubricated paint can be used cold air or compressed air to blow away the bristles, so that the brush always
to maintain a "slightly moist" state
. Brushes must be kept

loose
and do not soak the bristles in the lubrication coating in order to keep the initial mold clean.
4
Lubrication coating should be placed in a special container
(special container with tweezers), to keep the storage capacity in the container is less, to prevent the lubrication coating moisture thickening and affect uniform application. Containers should always be kept clean, tweezers and inner walls should be cleaned regularly.
5
is a bottle-making machine in the moment of uninterrupted action brushing operation, it is a "operational technique."
therefore, the bottle stopper should carefully observe the quality of each unit of the bottle, and according to the quality of the bottle, set the interval between the brushing time and the location of the brush. Special attention should be paid to:
ADue to different bottles, different units and the specific process conditions of each machine, the brushing cycle should not be the same, so according to the product variety and specific process conditions and brushing experience to correctly adjust the brushing interval.
B Note that only when necessary to brush, the position to be accurate, the action to be rapid, the amount of brushing to be less, and to be evenly painted. Generally just look at the position, from top to bottom gently wipe once.
C If the brush is used continuously, turn the brush at an appropriate angle before using it (make the brush loose).
D Too much or uneven brushing will be the initial mold, reduce efficiency (frequent mold changes), affecting the quality of the bottle. The less and more uniform the paint, the better the surface quality of the bottle.
E When applying lubrication paint to the mouth mold, the machine with the function of brushing lubrication coating should be painted in the state of shutdown, to make a suitable special brush, when the mouth mold is in the core position to brush, in order to paint to get a bit, effective, and according to specific products, production conditions to develop the corresponding brushing lubrication coating cycle.
F Bottles in the first operating cycle after coating should be removed to prevent the oil ash on the core from entering the bottle when painting paint, or the quality of the bottle due to changes in mold temperature when coating.
6 Lubrication coating in the initial mold cavity brush position is also very important,
on different shapes of the mold inner cavity, the impact of material droplets on the mold wear is more serious is only a specific part, in this part of the coating film wear faster, so it depends on the position will be lubrication will focus on painting in this part. Generally should be in the middle and lower part of the initial mold (below the gas line), both ends should be applied as little as possible, pay attention not to make lubrication paint stained on the seam surface of the initial mold. 7 In order to make the lubrication coating in the initial mold film uniform, the brush does not have to take the lubrication coating
every time, as long as the blow-off bristles, so that the bristles are slightly moist and loose state, can still adhere to the use. Special attention should be paid to: every
times to the mold brushing unit order, so as not to the same unit of the mold is always painted first, and resulting in uneven coating.
8 When using an initial mold without pre-coating treatment
, the best treatment before installation should first preheat the mold to 400
degrees C
to 500
degrees C
, with cotton yarn to remove surface dust or with a clean cotton yarn with 30 degrees oil wipe, quickly brushing the lubrication coating, so that it reaches a thin and uniform coating. At this time the coating film should be presented silver gray, which is the best film temperature of the lubrication coating, the best attachment, wipe with cotton yarn does not fall off. If the coating is blue or black, it means that the primary mold temperature is too low, the original mold baking temperature is too high, because of the rapid volatility of the coating is not easy to produce uniform lubrication film. Therefore, the first brushing operation of the initial mold is extremely important.
four rational treatment of the use of mold coating misunderstanding
1 first mold lubrication paint its performance characteristics, should be able to achieve a good mold lubrication release effect. Therefore, we should remind the bottle-making machine operator in particular, realize that the mold lubrication coating is by no means "golden oil", it can not solve the shortcomings in the operation of the bottle-making machine, also can not correct the defects in the mold itself, but also can not solve the problem of mold cooling. Therefore, it
clearly stated that it can not hide some hidden problems in the operation of the bottle-making machine and its negative impact on product quality.
2 Mold lubrication coatings should never stain the mold
. On the lubrication coating "adhesion" understanding of the misunderstanding, should not think that the greater the adhesion of the coating, the better, because adhesion is to meet the lubrication cycle, so far the international well-known general brand of mold lubrication coatings, its lubrication cycle is generally about 20 minutes. Too strong adhesion will cause the cavity scar of the mold cavity and increase the gap between the mold seams, resulting in the product "first mold line" and other defects, increasing the difficulty of mold cleaning and maintenance, thereby reducing the life of the mold.
3
on the mold lubrication coating of the most
important test
, should be
to see if the initial blank flipped out of the initial mold after the phenomenon of "carrying material" (sticky paint black ash), but also to see whether there is a glass bottle product surface "black ash" and "black spots",
when the hand rub pollution is obvious, which is absolutely not allowed. It can have a bad effect on the irrigation of beverage plants. Therefore, the excessive or excessive thickness of each brush should be avoided under normal brushing operation.
4 The
of the selection of mold lubrication coating classification is the tendency of simplification
:
a
to the mold lubrication coating brand and grade of the reasonable choice. Should be classified according to its grade function selective use, its typical performance is that some manufacturers will use generic paint to lubricate the mouth mold practice, while the foreign practice is to choose the special coating of the mouth mold.
b
it would be unwise to paint the mold in order to address defects in process and product quality.
C It should be pointed out that some customary operation, when the mouth mold returns to the position of the core mechanism, the practice of coating the mouth mold is the most harmful. Especially when some poor quality lubrication coating will flow into the core mechanism, which has a negative effect on the reverse blowing action, will directly cause a number of defects in the glass bottle product (for older models without paint keys).
5 Brushing paint job
1 first-mode brushing paint job
:
a
brush size and the size of the first mold match;
b
the contact part of the first mold and the mouth mold when painting paint good (slip, impact is small);
c
if the brush is too large, will be applied to the first mold (outside the inner cavity, resulting in carbon accumulation (resulting in poor stitching), and will make the first mold neck paint insufficient cracks;
d
brush to be fully screwed dry after use (dirty machinery / molds→ cleaning and hygienic workload of large / frequently changing molds, dirty bottles, fuel consumption);
e
after painting paint on the first mold side is the reason for soiling the mold;
f
first mold from the gas line to the lower part to the appropriate amount of paint, if excessive →disme less exhaust→ glass liquid and mold joint
tevery touch→ bad hardening→ bottom thin, bottle body wall thin;
g
Brushes after coating should be immersed in the cylinder while hot (high temperature, oil easy to immerse in the inside of the brush), and then screw dry for use.
h
primary mold
blow
-
blowing
brush coating site: from the drop position (mold cavity 2/3 is the gas line) to start the coating, all the way to the bottom should be uniform
swashing
paint (Figure 1).
Figure 1
i
First-mode
pressing
-
blowing
painting paint site:
as long as
spawing
the finer part in the middle of the cavity (Figure 2).
Figure 2 j
First-mold small-mouth pressure-blow coating part
only painted at the drop position to the first mold waist level (from funnel 2/3 to the middle of the first mold) (Figure 3).
figure 3
2
mouth mold painting work:
a
bottle mouth long mouth mold inside the paint should be more careful, careful;
b
if the brush with wool, attached to the top of the guide ring will get dirty guide ring.
3
molded paint work
:
a
flowing to the mold cavity of the paint will make the product bottle shoulder / body bump uneven, oil ash;
b
brush is fully screwed out to be painted in the necessary position;
c
is fully dried so that the oil does not stain the mold as well (otherwise the mold is replaced frequently);
d
brush to make the wrist can move freely for good, too long is not good.
, paint can reduce cracks, but also can produce cracks, soiling molds, brushing paint to pay full attention to!