System for producing internally hollow limiting and covering bands for use in planters and seed drills, manufactured by a rubber injection method

Abstract

The present patent application describes an efficient and rapid system for producing and manufacturing hollow limiting and seed-covering bands for use in planters, using rubber injection. This system aims to eliminate steps in order to optimise production time, as well as to improve product quality with respect to finishing and construction, thereby increasing service life. The system comprises a set of moulding parts that will mould the molten rubber, fed directly by the raw material in strip form, passing through the rubber injector to the mould. This system drastically reduces the production time by between 5 (five) and 15 (fifteen) minutes, the thickness of the material determining the time required. The invention pertains to the fields of agriculture, engineering, production and quality.

Description

[0001] A system for producing internally hollow limiting and covering bands, used in seed planters and seeders, manufactured by rubber injection molding.

[0002] BRIEF SUMMARY AND FIELD OF INVENTION

[0003]

[0001] This invention application describes an efficient and fast system for the production and manufacture of hollow seed-limiting and covering bands, applied to planters, using rubber injection. This system aims to eliminate steps to optimize production time, as well as improve product quality in terms of finish and construction, increasing service life. Field of application: agriculture, engineering, production and quality.

[0004] Fundamentals and State of the Art

[0005] [2] Manufacturing and methods currently focus on numerous stages in product design, requiring diverse machinery and prior material preparation before manufacturing begins. This also demands greater resources such as specific machines, both in development and preparation, and specialized personnel to operate these machines. The expertise is not limited to machinery, but also extends to manual handling at certain stages, thus narrowing the demand in the market for skilled personnel.

[0006] [3] Continuing with the rationale, the product itself, in its production and manufacturing, has compromised quality and lifespan due to numerous deformations and stresses exerted on the rubber material, such as high temperatures for molding, cooling, reheating, applied forces, and other factors that weaken the material. Furthermore, if the previous preparation is inadequate, there is a high probability of product loss during the process. The aforementioned step involves taking an oblong hollow rubber rod of the specified length for a product, joining the ends to form a circle, and then heat-welding it using a specific machine operated by a person. After welding, a thin strip is applied around the weld to conceal it in the finished product. This weld increases the likelihood of breakage during the manufacturing process, as well as causing poor product uniformity, creating a characteristic depression at the welded area.

[0007] OF THE NEW INVENTION

[0008] [4] The present patent application aims at optimizing production time, quantitatively reducing labor and qualitatively increasing the finished product, using a rubber injection and vulcanization system. The system consists of a set of matrix parts that will mold the molten rubber, fed directly by the raw material in strip form, passing through the rubber injection molding machine to the mold.

[0009] [5] This system drastically reduces the execution time by between 5 (five) and 15 (fifteen) minutes, depending on the thickness of the material. It is worth mentioning that the product quality and service life increase due to the material being injected, that is, this system reorganizes the atoms of the material reducing stress and eliminating forces for plastic deformation.

[0010] GENERAL DESCRIPTION OF THE INVENTION

[0011] [6] The system consists of two female dies, upper and lower, an intermediate male die, creating a sandwich for receiving the rubber, an air injection pin, a slide for moving the air injection pin, and a rubber injection bushing. The injection bushing is inserted in the center of the intermediate male die, into which the rubber will be injected and distributed along the dies. Then, after the desired injection, pressurized air is released from the air injection pins to pressurize and move the material at the end of the molds, contouring the product profile and expanding its core so that it becomes hollow.

[0012] DESCRIPTION OF THE FIGURES

[0013] [7] The invention will be described in detail, and for better understanding, the following drawings are attached: Figure 1: Perspective view of the die that integrates the manufacturing and production system for limiting and covering seed bands used in planters hollow internally by rubber injection;

[0014] Figure 2: Exploded view of the components that make up the manufacturing and production system for limiting and covering seed bands used in planters that are internally hollow by rubber injection;

[0015] Figure 3: Side view in section of the die used in the manufacturing and production system of limiting and covering seed bands used in internally hollow planters by rubber injection, illustrating the use of the median mold; Figure 4: Side view in section of the die used in the manufacturing and production system of limiting and covering seed bands used in internally hollow planters by rubber injection, illustrating the injection of rubber into the die;

[0016] Figure 5: Side view in section of the die used in the manufacturing and production system of limiting and covering seed bands used in internally hollow rubber injection planters, illustrating the opening of the female dies;

[0017] Figure 6: Side view in section of the die used in the manufacturing and production system of limiting and covering seed bands used in internally hollow rubber injection planters, illustrating the median die moving to initiate vulcanization;

[0018] Figure 7: Side view in section of the die used in the manufacturing and production system of limiting and covering seed bands used in internally hollow rubber injection planters, illustrating the use of female dies for vulcanization;

[0019] Figure 8: Perspective view of the components used in the manufacturing and production system of limiting and covering seed bands used in internally hollow rubber injection planters, illustrating the product exiting the mold.

[0020] DETAILED TECHNICAL DESCRIPTION

[0021] [8] The SYSTEM FOR PRODUCING INTERNALLY HOLLOW LIMITING AND COVERING BANDS, USED IN SEED PLANTERS AND SEEDERS, MANUFACTURED BY RUBBER INJECTION PROCESS, the subject of this invention patent, comprises a set of dies (1) composed of two upper (2) and lower (3) female dies and an intermediate male die (4) positioned between the dies; a central injection pin (5) for alignment and air injection nozzles (6) for each female die, with the aim of pressurizing the interior so that the rubber (B), fed externally, leads to obtaining the bandage (B1) by expanding throughout the perimeter (P) of the die molds.

[0022] [9] More specifically, the upper (2) and lower female dies are positioned at the ends of the assembly (1) constituting the mold of the product model to be produced, thanks to the positioning of the intermediate male die (4) between them which also has an internal mold of the product for hollow bandage formation; this system generates the product in two pieces which are joined, by means of vulcanization, to form a single piece.

[0023]

[0010] The system involves compressing the set of dies (1), then the rubber (B), in the form of raw material, fed externally, passes through an injection machine that melts the rubber (B) to a liquid state, facilitating filling the perimeter (P) and injecting the material into the set of dies (1) through the central injection pin (5).

[0024]

[0011] After this, high-pressure air is released inside the dies through the air injection nozzles (6) of the upper (2) and lower (3) female dies so that they detach from the perimeters (P) of the intermediate male die (4), releasing the dies to move vertically and the retraction of the intermediate male die; then, the upper (2) and lower (3) female dies are joined again with the two halves of the bandage (B1) for the final stage, vulcanization, closing the production cycle.

[0025]

[0012] Therefore, the present invention aims to optimize production time, reduce the quantity of labor and increase the quality of the finished product, using a rubber injection and vulcanization system. The system consists of a set of matrix parts that will mold the molten rubber, fed directly by the raw material in strip form, passing through the rubber injection molding machine to the mold.

[0026]

[0013] The invention system drastically reduces the execution time to between 5 (five) and 15 (fifteen) minutes, the time required depending on the thickness of the material. It is worth mentioning that the product quality and service life increase due to the material being injected, that is, this system reorganizes the atoms of the material reducing stress and eliminating forces for plastic deformation.

Claims

CLAIMS 1) PRODUCTION SYSTEM FOR INTERNALLY HOLLOW LIMITING AND COVERING BANDS, USED IN SEED PLANTERS AND SEEDERS, MANUFACTURED BY RUBBER INJECTION PROCESS, characterized by a set of dies (1) composed of two upper (2) and lower (3) female dies and an intermediate male die (4) positioned between the dies; a central injection pin (5) for alignment and air injection nozzles (6) for each female die, which uses rubber (B) as raw material, fed externally and which passes through an injection molding machine before reaching the set of dies. 2) A PRODUCTION SYSTEM FOR INTERNALLY HOLLOW LIMITING AND COVERING BANDS, USED IN SEED PLANTERS AND SEEDERS, MANUFACTURED BY RUBBER INJECTION PROCESS, according to claim 1, characterized by upper (2) and lower female dies being positioned at the ends of the assembly (1) constituting the mold of the product model to be produced, depending on the positioning of the intermediate male die (4) between them, which also has an internal mold of the product for hollow band formation; the system shapes the product into two pieces that join, by means of vulcanization, to form a single piece. 3) PRODUCTION SYSTEM FOR INTERNALLY HOLLOW LIMITING AND COVERING BANDS, USED IN SEED PLANTERS AND SEEDERS, MANUFACTURED BY RUBBER INJECTION PROCESS, according to claims 1 and 2, characterized by compression of the die assembly (1), then the rubber (B), in the form of raw material, passes through an injection molding machine that melts the rubber (B) to a liquid state, facilitating filling in the perimeter (P) and injecting the material into the die assembly (1) through the central injection pin (5); after that, high-pressure air is released inside the dies through the air injection nozzles (6) of the upper (2) and lower (3) female dies so that they detach from the perimeters (P) of the intermediate male die (4), releasing the dies to move vertically and the retraction of the intermediate male die; Next, the upper (2) and lower (3) female matrices join together. again with the two halves of the bandage (B1) for the final stage, vulcanization, closing the production cycle.

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