Method for transferring a machine for plastic treatment from one production mould into another production mould and machine for carrying out the method

A method for converting a plastic processing machine from one production mold to another and a machine for carrying it out

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention

BACKGROUND OF THE INVENTION

The plastic processing machine can be, for example, an injection molding machine or a blow molding machine.

The following problem arises with these machines · For example, a plastic hollow body manufacturer has only a blowing machine for use and produces normal high-volume drums with a volume of about 220 liters. · Now has a limited order for 60 liters of plastic cans . Therefore, the blowing machine must be shut down and the blow mold for 220 l drums removed from the shaped clamping plate for the perimeter supply line. A smaller blow mold holder for 60 liters of plastic cans is then attached to this molded plate and the corresponding working means, for example of electric power, hydraulic oil or cooling fluid, are connected. If they want to produce 220 1 drums after the canister order has been processed, the conversion of the production mold must take place in the opposite direction. This simultaneously achieves long downtime and higher profit losses on the blow molding machine.

The same applies to an injection molding machine when replacing the injection mold. This results in a relatively shorter period of comparable production losses, since the injection molding machine usually achieves a higher production rate than, for example, a batch blow molding machine.

It is an object of the present invention to provide technical and constructional measures which allow a simple and cost-effective way of converting a plastics processing machine in a short time and quickly from one production form to another production form, thus keeping the handling closure of the machine as low as possible.

SUMMARY OF THE INVENTION

According to the invention, this object is achieved in a plastic processing machine with a two-piece mold, the mold halves of which are attached to the production takeover on two differently movable shaped clamping plates by leaving the mold halves of the first production type on the shaped clamping plate and · appropriately supplied to the process through various pipes and / or flexible hoses, or a molten plastic raw material and / or a working agent such as electric power, hydraulic oil or coolant

To this end, it is stated in the construction that the mold halves of the first production type fixed on the mold clamping surface are provided on their inner wall side with an additional fastening means for fastening the mold halves of the second production type.

This means that the downtime can be reduced considerably, especially the loss of production time. · Program-controlled plastic processing machines can continue to work without interrupting the program, since there is a fixed spacing in the closing path of the horizontally acting mold halves. eventually shaped clamping plates in a limited, freely selectable range definitely fit together ·

Especially when the adjustment of this machine is often carried out in a short time, it may be expedient if a separate pipe or flexible hose or cable with a quick-release cable is provided for supplying or discharging molten liquid plastic and / or a working agent such as hydraulic oil or coolant, such as bayonet ·

Adapting the blow mandrel to a different blow mold can be quickly accomplished in the blow molding machine by placing the longitudinal pieces on the blow mandrel.

It is evident from the above description that a high-intensity plastic processing machine can be created by simple means and an affordable production process with a higher production load ·

Overview of figures in the drawing

The invention is further illustrated by way of example with reference to the drawing, which shows a side view of a plastic processing apparatus.

DETAILED DESCRIPTION OF THE INVENTION

The blow molding machine 10 comprises a base frame 34 and a vertical beam 36 on which the hydraulic drives are mounted in a substantially horizontal direction to control the shaped clamping means.

The upper horizontal beam 38 and the lower horizontal beam 40 are formed to guide the shaped clamping plates 16, 18. Between the two shaped clamping plates 16 & apos; blowing a plastic preform in the form of a hose which is forced out of the annular nozzle or the accumulation head 28 formed at the top directly against the shaped clamping plates 16, 18. Mold halves 16 to 18 are commonly mounted to blow molds or plastic hollow bodies. In complicated cutting operations, such as a flange ring during canister forming operations, mold halves may be provided with separate mold gates.

The function of these blow molding machines is well known and therefore no explanation is given.

The first production type mold halves 12, 14 clamped on the mold clamping plates 16, 18 are sized to 220 l drum. This first production type is shown in dashed lines in the figure on the first production type mold halves 12, 14. of the type are provided at the top and bottom with a forming damper running from the support and transport ring

According to the invention, the two mold halves 12-14 of the first production type are provided with a fastening means 20, such as angled strips with threaded holes, for clamping the two mold halves 22-24 of the second production type. 24 molds of the second production type are designed for the production of 60 1 plastic canisters and are fitted with a molding slide at their lower end for ramming the handle in the wall of the canister · Comparability of the molding slide is indicated by two vertical arrows and halfway 12 · 14. The form of the clamping plates 22 «24 is indicated by the horizontal arrow ·« Μ Μ

For deflating the high-volume drum, the machine is provided with an adjacent blow mandrel 32 and for deflating the canister with an extension 30 adapted to the mold halves 22 '24 of the second production type, which also have suitable fasteners. of the plates 16, 18, a fixed spacer 26 is formed on the lower horizontal beam 40, which can be easily adapted to adapt the moving parts of the machine to the complementary mold halves 22 & apos;

The halves 12, 14, 22, 24 are provided in the normal procedure with a hydraulic line to operate the mold slides and in the coolant line.

For quick assembly, these pipes or hoses are fitted with a quick-release fastener, which is not shown in the figure for better clarity. ·