WO2018023184A1 - Float produced by injection-moulding for water systems - Google Patents

Abstract

The invention relates to a method for producing floats (1) by injection-moulding of two three-dimensional bodies (2 and 3) with an edge (4), forming a non-watertight capsule (C), on which a plastic envelope is also injection-moulded, the surface of the capsule merging with the envelope under the temperature and pressure inherent to the injection-moulding process, this surface merging causing the capsule to become hermetically sealed and watertight, thus providing an injection-moulded float (1) capable of floating on a liquid medium.

Description

 HYDRAULIC INSTALLATION buoy Manufactured by the INJECTION PROCESS

Introduction

 [0001] It deals with the present patent application for an unpublished "HYDRAULIC INSTALLATION buoy manufactured by the

INJECTION ", more particularly of a float for the automatic filling water control of reservoirs by filling level, obtained by the injection process using polymer, whose constructive arrangement reproduces the shape and volume of the required product, thus promoting a series of advantages. practices in the civil construction segment, specifically hydraulics.

 Numerous float-controlled valves are known in the art, and in these valves a float positioned at the free end of the lever arm that follows the up and down movements of the liquid within the reservoir to close an inlet opening and prevent liquid from entering when the volume in the reservoir reaches a certain level, or open the opening to allow liquid to enter when the volume in the reservoir is below a certain level.

 The current state of the art anticipates some patent documents dealing with buoys such as PI 9204618-5 entitled "Blown Buoy" - consisting of a one-piece blown device including flange, bore-float body outlet, arm and float itself, noting that the arm-buoy assembly attaches to the body by crushing, and further noted that the arm is provided with a pin housing sealing material whose pin fits to the water outlet hole located in the body.

Representative portion of the existing blown buoys on the market presents tightness problem due to the loss of quality in the air passage kneading stage during blow processing. This loss in quality refers to the poor air tightness caused by blowing process variables and therefore increases the possibility of malfunctioning of blown buoys in valve devices. Another problem of blown buoys is that the entire perimeter of the closure line is considered as a critical point due to the contraction of the plastic material resulting in uneven and minimal thicknesses in that line, which represents a risk of immediate or future rupture.

 Finally, in blown buoys there is a need to remove burrs, as well as subsequent finishing being these steps intrinsic to the blowing process. Thus, these are essential steps to eliminate non-product parts, which burden the final cost of the blown buoy, as these activities do not add value.

Of the Invention

 In order to overcome the widely exposed technical limiters, the inventor, after studies and research, created the injected buoy in which the tightness occurs by the fusion of the surfaces between the injected parts, thus creating a physical adhesion, thus eliminating the risks. tightness caused by kneading where air intake is common resulting in a more reliable product.

The buoy obtained by the injection process presents uniform thickness, since the contractions inherent to the plastic material are compensated in the injection process by the parameter commonly called "repression" and this feature does not exist in the blowing process.

 The buoy obtained by the injection process already has its final shape guaranteed, which eliminates sub-steps such as the removal of chips inherent to the blowing process, which ends up relieving the final cost of the product, as well as providing an appearance. attractive look in which even the least attentive consumer perceives the shine of the nonexistent part in the blown product that allows for a duller and rougher surface finish.

 Advantages of the Invention

 In short, the invention has as its most prominent advantages:

^■ Possibility of high degree of procedural automation of the buoy procurement process - little human intervention;

■ Great mechanical resistance;

^■ Final product without residual stresses and splicing line;

^■ Reduction of men / hour per piece;

^■ No need for composting and micronization; Deburring is automatic.

Description of the Figures

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

 Figure 1: Exploded side view of caps with flanged edges of the buoy manufactured by the injection process;

 Figure 2: Side view of the buoy manufactured by the injection process, with enlarged seam detail;

 Figure 3: Side view of the Parison formation of the blow molded buoy;

 Figure 4: Side view of the Parison's descent from the blow molded buoy;

 Figure 5: Side view of Parison crush by blow molding buoy;

 Figure 6: Lateral view of the inlet float pin inlet made by the blowing process;

 Figure 7: Side view of the buoy pressurized air inlet manufactured by the blowing process;

 Figure 8: Side view of the full expansion of the pressurized Parison in the blow molding mold cavity;

 Figure 9: Side view of the outlet of the float blow pin manufactured by the blowing process;

 Figure 10: Side view of the air passage kneading of the float manufactured by the blowing process;

 Figure 11: Side view of the buoy made by the blown process with shavings;

Figure 12: Side view showing detachment of inlet buoy chips made by the blowing process;

 Figure 13: Side view showing a buoy made by the normal closing line blow process and another obtained by the same critical thickness closing line process.

Figure 14: Perspective view of a blow molded buoy showing the regions of the product with burr concentrations. Detailed Description

 The buoy for hydraulic installation manufactured by the injection process, object of this patent application, proposes to obtain buoys (1) by injecting two volumetric bodies (2 and 3) with edge (4), forming a non-watertight capsule (C) and on it a plastic, also injected, contour is formed, whose surface fusion of the capsule with the contour occurs by means of temperature and pressure common to the injection process, and this surface fusion makes the capsule airtight and airtight configuring the injected float (1) able to float in liquid medium.

 More particularly, the injection process applied in the manufacture of Buoys (1) is effected by the injection of two bodies (2 and 3) with edges (4) which counterparts receive an overinjection (5) adhered to the junction (J) of the edges (4) by surface fusion by means of temperature and pressure parameters inherent in injection processing. The float (1) has a thickness (6) provided by the equitable contraction of the walls in the formation of the bodies (2 and 3), using the parameter called "repression" in the injection process. The injected float (1) also has a noticeable external brightness even to the less aware user when compared to the float obtained by the blowing process.

Claims

CLAIM 1) HYDRAULIC INSTALLATION FLOAT MANUFACTURED BY THE INJECTION PROCESS, characterized by using two superimposed injection molded volumetric bodies (2 and 3) that receive an overlap (5) adhered to the junction (J) of the edges (4) by fusion. through pressure and temperature parameters inherent in injection processing.