Zhangjiagang Putian Machinery Co., Ltd.

Relates to blow molding machines for the manufacture

In one type of known blow moulding machine, an extruder and a mould are both in fixed positions. In one design, the mould is directly below the head of the extruder. This means that continuous extrusion of a tube is not possible, as extrusion can only take place when the mould is open. When the mould is closed, the extrusion process must be interrupted. In a further design, the mould is at some distance below the extruder.

In a further design of blow molding machines of this type, the extruder is movable and the mould is fixed.

The present invention provides a blow moulding machine having a movable extruder with an extruder head mounted above a blow mould wherein a guide track is provided for controlling movements of the extruder and extruder head, said guide track having an upper vertically extending section laterally displaced from a vertical axis of the mould, a lower vertically extending section providing a position for the extruder head for delivering extrudate into the mould and an inclined intermediate section connecting the upper and lower sections.

In accordance with the injection moulding machine, the mould closing mechanism is stationary and the extruder head can move with the extruder upwardly and downwardly and simultanously in a lateral direction in a fixed sinusoidal curve, which has an upper section, which is laterally displaced in relation to the mould and extends vertically, an inclined intermediate section, which leads to the mould and a lower vertically extending section, in which the tube is inserted into the mould.

According to a further feature of the plastic injection molding machine the extruder may be mounted on a bracket plate, which is attached at its upper end to a hinge movable in the vertical direction, and a guide roller mounted on the lower part of the bracket plate, engages in the guide track.

A further feature of the blow moulding machine is that an upper cross-piece is mounted vertically on the machine frame, onto which cross-piece the hinge of the bracket plate is attached, and on which a crank drive, which controls the vertical movements of the bracket plate and the extruder operates.

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Oven for blow molding machine

A method and apparatus is disclosed for establishing a preferred temperature profile useful in the oven portion of a blow molding machine by incrementally adjusting heating elements for the exterior of the oven while a stream of parisons are in motion through the oven. The disclosure also includes means and method for preserving and duplicating a preferred temperature profile.

The present blow moulding machine relates to plastic preforms or parisons and relates, in particular, to heat treatment of parisons to condition the parisons for further treatment or further forming such as blow molding.

Classically, a series of parisons are conveyed continuously while being rotated on a support mandrel through an oven containing a battery of heating elements. The heating elements impart heat to the body of the parison usually (but not necessarily) from top to bottom of a vertically disposed parison to condition plastic from which the parison is molded for subsequent treatment.
Invariably, the heating elements are fixed in position within the oven and are arranged relative to the path traversed by the parison and relative to the shape of the parison to create a desired temperature profile throughout the body of the parison.

In contrast, the present invention provides an apparatus and a process facilitating convenient, initial setting and subsequent adjustment of the position of individual heating elements in a battery of elements.
It is a principal feature of the present plastic injection molding machine to provide a novel process for developing a desired temperature profile to heat treat a plastic parison.
It is a further important feature of the present injection molding machine to provide an apparatus operable to set and adjust individual heating elements, to and fro, relative to a continuously advancing line or series of parisons in incremental fashion from a point external of the heating oven.
A further feature of the blow molding machine is the provision of a battery of heating elements, for the purpose indicated above, where each element is provided with individual support means including adjustment means for moving individual elements selectively and in step by step fashion to a variety of positions relative to a selected portion, region or point on the body of a parison.

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Mould sets for blow moulding machines

This invention relates to mould sets for use in blow moulding machines including blow molding machine and moulding machines which are intended for prototype or other short run purposes. Mould sets are also known as mould bases.

Blow moulding machine has been known for many years and designs of such machines are available some of which are particularly suited to short run or prototype manufacture. Hitherto, the mould sets for all types of injection moulding machines have been made mainly of high quality tool steel which is not only a costly material but requires expensive machining operations in order to achieve the required longevity in use. Such mould sets are acceptable from a cost standpoint for long production runs of blow articles which may reach very large figures. However, when the mould set is only required for comparatively short runs, sometimes very short indeed where prototypes are involved, the cost of the mould sets becomes an unacceptably high proportion of the cost of production of the prototype articles.

Further according to the present injection moulding machine there is provided a mould set for use in a plastic injection molding machine comprising at least one individual main component of constant, predetermined, cross-section of extruded, high duty, aluminum alloy.

By manufacturing the main components of a high duty aluminum alloy the amount of machining eventually required is small because features of the components which are conventionally machined can readily be incorporated in the section as extruded, and it is of course readily possible to provide subsequently to extrusion the bores and passages through the components which are transverse to the direction of extrusion of the component. The final finish can be effected by spark erosion techniques or other conventional machining. If desired water cooling holes extending in the direction of the extrusion motion may be provided during the extrusion process.

As will be understood by those skilled in the art any main component of a mould set can be produced such as a cavity plate or an ejection plate and sliders.

The invention is also applicable to mould set components for blow molding machine.

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Calibrating unit for a blow molding machine

A method of controlling a blow molding machine from a completion of production of one product to a start of production of a next product comprises controlling a temperature of a resin within the blow molding machine, controlling an operation of devices from the completion of production of the one product to the start of production of the next product, controlling a sequent transport of some of the devices in predetermined positions, and controlling a change of the resin in accordance with a supply stop thereof and a data on the next product.

BACKGROUND OF THE INVENTION

The present invention relates generally to a blow moulding machine and particularly to an automatic operation control of the blow molding machine from a completion of production of one product to a start of production of a next product.

The injection molding machine is a machine which serves to make resin hollow moldings in accordance with the shape of a cavity formed in a mold held by a mold clamping unit. Upon molding operation, parisons as supplied from an extruder are received in the mold, and subjected to air blown out of a calibrating unit.

An installation of a plurality of blow molding machines to correspond to different types of resin hollow moldings is uneconomical, so that a single blow molding machine is generally used wherein different types of resin hollow moldings are formed by changing the molds and the molding jigs.

Conventionally, an exchange of the molds and the molding jigs are carried out manually, and not automatically. This does not allow a continuous operation of the blow molding machine.

SUMMARY OF THE INVENTION

According to one aspect of the present invention, there is provided a method of controlling a blow molding machine from a completion of production of one product of a resin to a start of production of a next product, the blow molding machine including a plurality of devices, the method comprising the steps of:

controlling a temperature of the resin within the blow molding machine;

controlling an operation of the plurality of devices from the completion of production of the one product of the resin to the start of production of the next product;

controlling a sequent transport of some of the plurality of devices in predetermined positions; and

controlling a change of the resin in accordance with a supply stop of the resin and data on the next product.

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Blow molding machine in China

China is the world’s largest manufacturer of blow molding machine, ranking first in the world on both yield and consumption. Chinese blow moulding machine industry is mainly distributed in Guangdong, Jiangsu and Shandong provinces accounting for 88% of total enterprises in Chinese blow molding machine industry, as per a report by Research and Markets. Totally speaking, East China takes absolute advantages, of which enterprise quantity in Zhejiang province accounts for 61%, having increased by 14 enterprises over that in 2005. In 2000, market capacity of the whole industry realized RMB 4.598 bln, increasing to RMB 14.578 bln in 2006. Following it, per capita sales revenues have been increasing year after year, from RMB 198,114 in 2000 to RMB 462,012 in 2006 up by three times. Totally speaking, the market still kept a stable growth and gross profit margin is in decline; while profits are rapidly climbing. Undoubtedly, all of these have showed that China injection Molding Machine Industry has been in a growing period.
In the past few years, blow molding machine manufacturing and technology companies has been greatly improved technology and management. However, compared with developed countries, China still needs to make up for plastic injection molding machine technology and varieties. In detail, there is still not little blank on such varieties as super-large or special precision blow molding machines; meanwhile, self-support rate of home-made blow molding machines for products processing is only about 45%; while for high-end products processing, most adopt imported blow molding machines. Totally speaking, research and manufacturing of blow molding machines cannot still satisfy demands brought by development of plastics industry in China.
As for industrial machinery, other machinery processing enterprises now most have been very little interest, and only the rapid development of blow molding machine. And with sustaining and promising market, many enterprises which originally produced machine tools, textile machinery and power equipments, also started to produce blow molding machines. At the same time, the newly established manufacturer of blow molding machines is growing rapidly, therefore, primarily in common blow molding machines and the discount price war war

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Eight Things Most People Don’t Know About Blow molding Machines

If you were to ask almost any group of people what they know about blow molding machines, I would be willing to bet that very, very few have any idea whatsoever what they do or how they operate.

Just to see you now is: I imagine a computer, keyboard, mouse, bottle, light switch, socket, rope, wastepaper basket, chair, a fire extinguisher, room smells, mask, door, fire alarm and etc. All these things out of a machine!

So, here are 10 things most people don’t know about them

1. Blow molding machine can range in size from table top to as large as your garage! Tiny medical parts, for example, are made in micro molding machines. These little parts are so small that you need a microscope to view them! Yet they have incredible detail and accuracy.

2. Some high production injection molding machine can produce over 200 million parts in one year! You would think that the entire world would be full of plastic parts by now and every man, woman, and child would have one of everything produced!

3. A high quality blow moulding machine can easily cost $750,000 US. This is just the bare machine, no accessories or special tools and no mold installed.

4. Every injection moulding machine requires a mold to produce parts. You would think this is obvious, but, for most people, it is not. They just never even give it a thought.

5. Some medical grade plastic can cost over $5000 per pound! Just imagine how unhappy the boss is when there is a high rate of scrap!

6. Some molding machines operate with no human present, 24/7. This is called, “Lights Out.”

7. If a human gets caught between the two halves of a plastic injection molding machine when it is closing, they will be completely crushed. The machine has pressure sensors, but if these are not activated, or malfunction, the molding machine, also known as a “press” will close and crush anything that is not supposed to be there.

8. It is possible to operate plastic mold injection machines in a very environmentally manner. If set up properly, and with the newer, greener machines, there is very little pollution. Not only that, but the plastic can be recycled and can be biodegradable.

Generally speaking, we are truly double-mode of modern society. If no such machinery servants, we’ll have no thousands of products, we use in everyday life.

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A blow molding machine utilizing an extruder and having interchangeable machine tooling components, for manufacturing injection blow molded articles of different configurations and sizes, includes a stationary machine platen; a movable machine platen which is movable toward and away from the stationary machine platen along a machine axis, to close and open a mold; opposite support rails mounted to the movable platen; a shuttle plate mounted on the movable machine platen between the opposite support rails for movement with the blow moulding machine platen and movable perpendicular to the machine axis and having a rear surface in close proximity to the blow molding machines platen; core pin retainers mounted on the shuttle plate for movement therewith, each core pin retainer holding an interchangeable core pin that receives a parison to be blown into a bottle; slides movably mounted on the shuttle plate for movement with the shuttle plate and movable toward and away from each other in close
An injection molding machine utilizing an extruder and having interchangeable machine tooling components, for manufacturing injection blow molded articles of different configurations and sizes, said injection blow molding machine comprising:
a stationary machine platen;
a movable machine platen which is movable toward and away from said stationary machine platen along a machine axis, to close and open a mold;
opposite support structure mounted to said movable platen;
a shuttle assembly mounted on said movable machine platen between said opposite support structure for movement with said movable machine platen,
After the Egyptians produced small glass bottles, the process of creating glass changed very little until around 250 B.C. when the Babylonians began the process of plastic injection molding Machine which dramatically reduced the cost of glass production. By reducing the cost, the Babylonians made glass available to everybody within their society.
Slides movably mounted on said shuttle plate for movement with said shuttle plate and movable toward and away from each other in close proximity to a front surface of the shuttle plate around said at least one core pin retainer mounted on the shuttle plate, said slides having interchangeable neck rings an injection mold with interchangeable injection cavities mounted on said stationary platen;at least one blow mold assembly with interchangeable blow mold halves defining blow mold cavities, said at least one blow molding machine manufacturer assembly fixed relative to and positioned adjacent to said stationary machine platen; and at least one take off station mounted on the shuttle plate and including interchangeable pick off pins and stripper bushings movable along the pick off pins for removing a blown bottle on the pick off pins.
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