WO2015036877A1

WO2015036877A1 - System for positioning rotational casting moulds

Info

Publication number: WO2015036877A1
Application number: PCT/IB2014/063522
Authority: WO
Inventors: Antônio Carlos TORRES
Original assignee: Torres Antônio Carlos
Priority date: 2013-09-12
Filing date: 2014-07-29
Publication date: 2015-03-19
Also published as: BR102013023406B1; BR102013023406A2

Abstract

The invention relates to a system for positioning rotational casting moulds, especially to a system (1) including a movable platform (2) that keeps the operator at the ideal height for the unmoulding process, ensuring their safety and preventing accidents, besides improving mould positioning, thus achieving an increase in the number of moulds (5) on the arm (3) and therefore an increase in productivity.

Description

MOLDING POSITIONING SYSTEM FOR LABELING

This patent application is for a MOLDING POSITIONING SYSTEM for ROLLMOLDING especially a system that includes a mobile platform that keeps the employee at the ideal time for the demolding process, ensuring safety and preventing accidents, and containing improvement. in the positioning of the molds, which achieves an increase in the amount of molds in the arm and, consequently, an increase in productivity. This system also changed the fixation of the molds next to the arm and fixation of the mold cover, which received screws that contributed to avoid the risk of undesirable falls and high risk accidents, as well as the mentioned screws in the cover, prevent leakage of raw material in this region preventing the final product from coming out with excess burrs and under the specified weight. Overall, the system offers operator safety, increased productivity in less time, avoids waste of raw materials, ensures economy and reduces labor.

APPLICATION FIELD

The proposed system has as its field of application the use in rotational molding machines and processes, in this case presented for reservoir rotational molding processes, but not limited to them.

CONVENTION

Rotational molding is a highly versatile process that enables a wide range of production from thermoplastic transformation. Through it is possible to idealize and make possible the most varied projects for demands, preferences and needs with the advantages of customization and low cost. Rotational molding, also known as rotational molding or rotational casting, is the process where, by heating polymeric materials, melting and transformation of a particular part by the joint action of temperature and rotation occurs.

Currently demoulding in the rotational molding process has a number of drawbacks, of which:

> Safety issues: The operator is below the arm of the demoulding machine, which requires lowering and even crouching most of the time, which can cause serious accidents if the mold falls, as well as an ergonomic problem.

> Mold quantity problem per arm: currently the arms have a small number of molds which consequently reduces productivity.

> Cost problem: Increases gas consumption due to lower productivity, increased labor and production time.

> Raw material loss problem: As the mold cover closure system is deficient, consequently mold leaks can occur, causing the products to come out of excess burrs and under the set weight. These leaks occur due to the locking system, which by being adjusted manually, often come off, causing leaks that in addition to increasing burr and decreasing weight, spread on the production floor, which should be directed an operator to make cleaning up wasting time on this task. With these difficulties in mind, manufacturers who are more attentive to market needs seek to develop equipment that provides operator safety, raw material savings, higher productivity costs, in line with the focus of this privilege request, features that have been gaining ground. in the consumer market.

TECHNICAL STATE

The current state of the art anticipates some patent documents dealing with the subject matter such as PI9303562-4 - ROTOMOLDING MACHINE IMPROVEMENT which refers to a machine for the molding of hot-melt rotational material comprised of a set of rotational molds, mounted on structures capable of impressing them with two movements, namely: rotating support structure and transfer support structure and, in addition, thermo-fuse material processing stations are provided, such as: oven, cooling station demoulding station, reloading station, said shuttle support structure comprises one or more trolleys provided with supports for the rotation support structure having the molds mounted; said trolley carries rotating frame-support drive means and travels on rails and / or raceway arranged between the various heat fuse material processing stations.

In this case presented above, the patent provides as a inventive concept a rotational molding machine, although it is not specifically the focus of the intended patent, such priority brings a set of rotary bracket mounted rotary molds where the operator feeds the machine and demolds the product on the ground, ie below the mold, without any safety for the operator, which incurs the same drawbacks as above.

NEW SYSTEM

Aware of the state of the art, its shortcomings and limitations, the inventor, after studies and research, created the MOLD POSITIONING SYSTEM FOR

LABELING in question, which, in general, designs a system that includes a mobile platform that keeps the employee at the ideal time for the demolding process, ensuring safety and avoiding accidents, and contain improved positioning of the molds, which achieves increased number of molds on the arm and consequently increased productivity. This system also altered the fixation of the molds close to the arm and fixation of the mold cover, which received bolts that contributed to avoid the risk of undesirable falls and high risk accidents, as well as those bolts in the cap prevent raw material leaks. in this region preventing the final product from coming out of excess burrs and under the specified weight. Overall, the system offers operator safety, increased productivity in less time, avoids waste of raw materials, ensures economy and reduces labor.

The MOLDING POSITIONING SYSTEM aims to provide greater safety for the operator so that he can work at the right ergonomics without risk of accidents, demoulding is simple with easy-to-handle screws and the final product when removed from the mold, is intended for the next step by safe means. The MOLDING POSITIONING SYSTEM features a platform that offers better operator contact with the moldings of the rotational molding arm, so that it allows work by two operators simultaneously where while one operator removes the finished product, it releases to the other prepares the mold for a new rotational molding process, reflecting in the reduction of time with greater productivity.

When it comes to productivity, this MOLDING POSITIONING SYSTEM allows for better matching of molds on the arm of the rotational molding machine, which has a larger number of molds per arm, thus favoring increased productivity at low cost.

The MOLDING POSITIONING SYSTEM FOR ROTATING ensures that there is no change in the overall rotational molding process but in post-production logistics due to the operator being at the same height as the demoulding operator, ergonomics of the standing operator, economy of raw material that is related to the better locking of the mold lid that is effected by screws avoiding the leakage of raw material during the process and the amount of production, in this case, there is a larger amount of mold per arm significantly increasing the production.

In this sense, the production gains are related to the amount of molds in the arm, ie more product transformed in less process time. When the cooling process finishes and the demolding process begins, the equipment arm automatically adjusts to the horizontal position and fixes its alignment to the platform. Operator drives the platform toward the arm to begin unscrewing the molds to cover opening (platform movement system is only available after full stop in arm in position). The rest of the process is quite simple. The operator opens the lid, demolds the product coming down a slide fixed to the platform, while another operator loads the mold again. The loading of the mold is done manually, it can also be done by automatic dosing systems in the market.

Then the lid is closed again and the arm only rotates horizontally to release the other molds. After demolding and loading the molds on one side of the arm, the platform moves away from the arm and locks its movement so that the arm rotates 180 °, positioning the other side of the arm in a horizontal position. With the arm fully stopped, the platform moves back toward the arm and the whole process is repeated. Finishing the demoulding and loading of the molds, the platform moves back, freeing the arm to enter the oven.

BENEFITS

In short, the claimed system has the most important advantages:

> Eliminates the operation performed below the molds (machine);

> Ensures operator ergonomics by using the mobile platform that maintains the optimum height in the demolding process;

> Prevents leaks and risk of accidents by opening the mold cover made by screws that are tightened and loosened by pneumatic machines; > The molds are fixed by screws and divided into equal positions within the equipment limits, eliminating the risk of contact with the floor and leaving the whole fully balanced;

> The platform moves according to the equipment schedule to prevent the arm from turning or moving in the demolding process;

> Increase from 02 to 04 molds in the arm, depending on the capacity of the equipment;

> Standardization of arm molds ensures safe balancing, reduced gas consumption and lower maintenance rate on equipment and molds;

> Easy handling;

> Great cost-benefit ratio.

The following explains the invention with reference to the accompanying drawings, in which they are illustrated by way of illustration and not limitation:

Fig. 1 - Perspective view of the rotational mold positioning system, showing the platform;

Fig. 2 - Inverted perspective view of the platform of the rotational mold positioning system;

Fig. 3 - Exploded perspective view of the mold positioning system for rotational molding;

Fig. 4 - Top view of the mold positioning system for rotational molding;

Fig. 5 - Side view of the mold positioning system for rotational molding; Fig. 6 - View of the rotomolding mold positioning system, showing the use with two operators;

Fig. 7 - Perspective view of the mold positioning system for rotational molding, showing the detailed use of operator positioning on the platform with the mold cover open;

Fig. 8 - Sequential view of the conventional system showing the operators below the molds, the mold cover tab, the operator clearing the ground, the operator dragging bucket with raw material, the operator pushing the final product and the arm with only three molds on the side.

DETAILED DESCRIPTION OF THE SYSTEM

The MOTOR POSITIONING SYSTEM FOR ROTATING, subject of this patent application, relates to a system (1) designed to provide increased production of rotational molded products and to improve operator ergonomics with complete safety, for this purpose the system ( 1) It consists of platform (2), arms (3), spider (4) with molds (5) positioned in the horizontal line.

More specifically, the system (1) comprises a movable platform (2), formed by a lower structure (6) that moves on rails (7) in only two directions that allows the platform (2) to move apart and approach the molds. (5). Said platform (2) is provided with upper floor (8) which is where the operator reaches the same height as the molds (5), it is preferably made of metal, with lower structure (6) and the upper part has the protective fence

(10) in the entire peripheral region, except the front, which has an opening

(11) according to the space between the molds (5) that when advancing the platform (2) the spider (4) reaches the upper floor area (9) (8) to contribute to the operator safety (O).

Still the platform (2) on one side is provided with elevator (12) of buckets (13), where said bucket (13) with raw material is placed in the base (14) of elevator (12) and after the computation of When some buckets (13) are filled, approximately ten or more, the elevator (12) is driven by raising them to the height of the upper floor (8) of the platform (2), so that the operator (O) feeds the molds (5). ). This process is performed for each arm (3) of the machine (M) in the demolding process.

Following on the same side of the platform (2), it has the bucket slide (15) serving the operator (O) to direct the already used buckets where they are placed on the slide (15) so that another operator (O) If it stays on the floor, it can be reloaded with the raw material, after which it is placed back in the elevator (12), starting another cycle. This procedure is performed for each machine arm (3) (M) in the demolding process.

At the rear of the platform (2), there is the slide (16) of demolded products, in this case represented by a reservoir (R), but not limited to it, where after the rotational molding process, the operator (O) withdraws the product. (R) from the mold (5) and leads to the slide (16) which in turn directs the ready product to the ground operator (O), who will direct the product to the separation area. Also at the rear of the platform (2) is the ladder (17) with protection (18) in the upper third, through which operators (O) will have access to the upper floor (8) of the platform (2).

System operation (1) occurs when the cooling process ends and the demolding process begins, the equipment arm (3) automatically adjusts to the horizontal position and fixes its alignment to the floor. top (8) of the platform (2). Operant (O) triggers platform movement

(2) manually moving the platform (2) along the rails (7) towards the arm (3) to start unscrewing the molds (5) by the screws (19) to open the lid (20).

Moving the platform (2) by the rails (7) is only possible after the platform (2) has been completely stopped on the arm (3), which allows the operators (O) of the upper floor (8) to begin their tasks.

After performing the entire procedure on the molds (5), the arm (3) rotates only in the horizontal position for demoulding the other molds on the same side. After demolding and loading the molds (5) on one side of the arm (3), the platform (2) moves away from the arm (3) so that it rotates 180 ° positioning the other side of the arm (3) in the horizontal position. With the arm (3) fully stopped, the platform (2) moves back towards the molds (5) and the whole process is repeated. Finishing the demoulding and loading of all molds (5), the platform (2) moves back, releasing the arm

(3) to enter the oven (F).

Therefore, the present patent application is novel and inventive thanks to the possibility of designing a rotational mold positioning system that allows better ergonomics and safety for the operator, increased production and, above all, guarantees economy of operation. Raw material avoiding leaks through the mold cover during rotational molding, which added to the industrial application makes it worthy of patent privilege.

Claims

1) MOLDING POSITIONING SYSTEM FOR MOLDING, refers to a system (1) for demolding product after the rotational molding process comprising a platform (2) provided with upper floor (8) and guard (10) and in its surrounding has elevator (12), bucket slide (15) (13), mold slide (16) ladder (17) and arm spider (4) with molds (5) with screws (19) and lid (20) in addition to lower frame (6) and rails (7).

Rotational molding positioning system according to Claim 1, characterized in that the platform (2) moves in two directions through the lower frame (6) and rails (7).

Rotational molding positioning system according to claims 1 and 2, characterized in that the platform (2) has an opening (11) in the upper floor (11) which is in accordance with the space between the molds (5) by advancing the platform (2) the spider (4) advances the upper floor area (9) (8) to contribute to the operator safety (O).

A rotary molding positioning system according to claims 1 and 3, characterized in that the spider (4) preferably has seven molds (5) per part and fourteen per arm (3).

The rotary molding positioning system according to claims 1, 3 and 4, characterized in that the unscrewing of the molds (5) occurs in the screws (19) of the lid (20). Rotational molding positioning system according to Claims 1, 3, 4 and 5, characterized in that the molds (5) are fixed to the spider (4) by screws (19).