Polymer observation window and preparation method thereof

Abstract

The invention belongs to the technical field of polymer transparent part manufacturing, and particularly relates to a polymer observation window and a preparation method thereof.The preparation method comprises the steps that a blank is manufactured, the blank comprises a center window body, a transition part and an edge assembling part which are integrally formed, and the edge assembling part is provided with two opposite assembling faces; the thickness of the central window body is smaller than that of the edge assembly part, and the assembly surface and the central window body are transited through a transition part of which the outer surface forms an inclined surface; the blank is installed on a pressing machine with a deformation mold, and the two assembling faces of the assembling part are made to make complete contact with the two opposite annular molded faces in the deformation mold respectively; and heating the deformation mold to fully preheat the edge assembly part, and then controlling the press to close the deformation mold to a preset position to drive the edge assembly part to diffuse, deform and thin towards the outer side, so as to obtain the polymer observation window with the self-reinforced edge assembly part. Through the method, the qualification rate of the polymer observation window with high edge strength can be improved, and low-cost manufacturing of the polymer observation window is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer transparent part manufacturing, and particularly relates to a polymer observation window and a preparation method thereof. Background Art

[0002] As a polymer transparent part, polymer observation windows are widely used in aircraft, high-speed trains, ships and other transportation equipment. In order to meet the strength requirements, a layer of composite material is usually bonded to the assembly surface of the edge of the polymer observation window during the preparation process to ensure the safety of the equipment during operation. However, this process of improving the edge strength of the polymer observation window by bonding requires high raw material, labor and time costs, thereby reducing the manufacturing efficiency of the observation window.

[0003] Therefore, in view of the above shortcomings, the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a polymer observation window and a preparation method thereof, so as to realize low-cost preparation of a polymer observation window with high edge strength.

[0005] The first aspect of the present invention provides a method for preparing a polymer observation window, comprising the following steps:

[0006] Making a blank, the blank comprising an integrally formed central window, a transition portion and an edge assembly portion, the edge assembly portion having two assembly surfaces arranged opposite to each other, the central window having a thickness smaller than that of the edge assembly portion, and the assembly surface and the central window being transitioned through the transition portion having an outer surface formed as an inclined surface;

[0007] A blank assembly machine is used to mount the blank on a press having a deforming die, wherein the deforming die has two opposite annular surfaces, and the two annular surfaces are in full contact with the two assembly surfaces of the assembly part respectively;

[0008] The forming process is heated and the deformation mold is heated to fully preheat the edge assembly part. Then, the press is controlled to close the deformation mold to a preset position to drive the edge assembly part to diffuse, deform and thin outward, thereby obtaining a polymer observation window with a self-reinforced edge assembly part.

[0009] The preparation method of the polymer observation window provided by the present invention may also have the following additional technical features:

[0010] In a specific embodiment of the present invention, in the polymer observation window, the angle between the inclined surface of the transition portion and the central axis of the central window body is 10 to 45°.

[0011] In one embodiment of the present invention, during the heating press, the thickness of the edge assembly portion is reduced to 1 / 3 to 2 / 3 of the original thickness; and / or

[0012] During the blank installation process, the annular inner edge of the deformation die does not exceed the transition portion.

[0013] In a specific embodiment of the present invention, in the heating and pressing step, the heating method is water heating, infrared heating or electric heating; and / or

[0014] In the heating and pressing step, the heating temperature is 100-200° C. and the heating time is 1-2 hours; and / or

[0015] The closing speed of the deformation die is 0.1-100 mm / s.

[0016] In a specific embodiment of the present invention, in the blank, two assembly surfaces of the edge assembly portion are curved surfaces and / or flat surfaces.

[0017] In a specific embodiment of the present invention, the raw material of the blank includes one or more of polycarbonate, polymethyl methacrylate, polyamide, polyether, and polysulfone.

[0018] In a specific embodiment of the present invention, the blank can be prepared by injection molding, thermoforming or extrusion molding.

[0019] In a specific embodiment of the present invention, along the circumference of the blank, a plurality of positioning columns are provided on one of the assembly surfaces of the edge assembly portion, and the edge assembly portion is adapted and positioned with the deformation die through the positioning columns.

[0020] In a specific embodiment of the present invention, during the heating and pressing step, two opposite assembly surfaces of the edge assembly portion undergo planar deformation.

[0021] The second aspect of the present invention further provides a polymer observation window, which is prepared by any one of the above-mentioned methods for preparing a polymer observation window.

[0022] The preparation method provided by the present invention realizes self-reinforcement of the edge assembly part by arranging the blank into a central window, a transition part and an edge assembly part, and deforming and thinning the edge assembly part on a large scale by hot pressing the edge assembly part. Moreover, since the edge assembly part and the central window are connected by a transition part with an inclined surface rather than being directly connected, the deformation of the edge assembly part has little effect on the transition part during hot pressing strengthening, and has basically no effect on the central window. That is, the above preparation method can realize self-reinforcement of the edge assembly part of the polymer observation window under the premise of maintaining the original high optical and surface quality of the central window area and controlling the quality of the transition part to be intact, thereby improving the qualified rate of the polymer observation window with high edge strength and realizing low-cost manufacturing of the polymer observation window. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of a blank in one direction in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the middle blank in another direction;

[0026] Figure 3 The present invention is a flow chart of the preparation method.

[0027] Description of reference numerals:

[0028] 100-blank, 10-center window, 20-transition part, 30-edge assembly part, 31-positioning column. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0030] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0031] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0032] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0033] The present invention provides a polymer observation window, which is mainly used in transportation equipment such as airplanes, high-speed trains, and ships. The polymer observation window is prepared by a preparation method of a polymer observation window.

[0034] Specifically, refer to Figure 1-3 The preparation method of the polymer observation window mainly comprises the following steps:

[0035] S100: Making a blank, the blank 100 includes an integrally formed central window 100, a transition portion 20 and an edge assembly portion 30, the edge assembly portion 30 having two assembly surfaces arranged opposite to each other, the thickness of the central window 100 is smaller than the edge assembly portion 30, and the assembly surface and the central window 100 are transitioned through the transition portion 20 whose outer surface is formed as an inclined surface.

[0036] Specifically, the raw materials of the blank 100 include but are not limited to polycarbonate, polymethyl methacrylate, polyamide, polyether, polysulfone, etc., and are specifically prepared by injection molding, thermoforming or extrusion molding.

[0037] The blank 100 specifically includes a central window 100, which is a transparent plate-like structure. The plate-like structure can be a polygon such as a circle or a rectangle or a rounded polygon. Its two opposite sides can be a plane, a curved surface, or a combination of a plane and a curved surface. The specific configuration can be customized according to actual needs. Optionally, the central window 100 of this embodiment is a curved surface of a rounded rectangle.

[0038] The blank 100 further includes an annular edge assembly portion 30, which is sleeved on the outer side of the central window 100 and transitionally connected to the central window 100 through an annular transition portion 20. The edge assembly portion 30 has two opposite assembly surfaces, which can be a plane, a curved surface or a combination of the two, which can be adjusted according to the shape of the central window 100. The thickness of the edge assembly portion 30 is greater than the thickness of the central window 100, so that the transition portion 20 is formed as an inclined surface. Specifically, the angle between the inclined surface of the transition portion 20 and the central axis of the central window 100 is 10 to 45°, such as 15°, 20°, 30° or 40°, etc. The angle can be adjusted by adjusting the thickness difference between the edge assembly portion 30 and the central window 100 and the width of the transition portion 20.

[0039] Furthermore, along the circumference of the blank 100, a plurality of positioning posts 31 are provided on one assembly surface of the edge assembly portion 30, and the edge assembly portion 30 is adapted and positioned with the deformation die of the press through the positioning posts 31. Optionally, in this embodiment, the number of the positioning posts 31 is 4, and they are distributed at the center of each side of the rounded rectangle of the edge assembly portion 30.

[0040] S200: blank assembly, the blank 100 is mounted on a press having a deforming die, the deforming die having two opposite annular surfaces, the two annular surfaces being in full contact with two assembly surfaces of the assembly part respectively.

[0041] Specifically, the deformation mold is a mold pre-designed and manufactured according to the shape of the polymer observation window. It can be formed into a ring shape to avoid the central window, or it can be formed into an integral structure with an avoidance groove to avoid the central window. It includes a first ring mold and a second ring mold that are relatively arranged and can be closed under the action of a press. The first ring mold and the second ring mold each have an annular profile, and the shape of the annular profile is similar to the profile of the edge assembly part 30. The inner edge of each annular profile does not exceed the inner edge of the transition part 20, and the outer edge exceeds the outer edge of the edge assembly part 30. In addition, a positioning hole corresponding to the positioning column 31 is also provided on the annular profile corresponding to the positioning column 31. A water channel heating, infrared heating or electric heating structure is also provided in the annular mold.

[0042] During installation, the blank 100 is installed on the corresponding annular surface of the deforming mold with the help of the positioning hole on the blank 100, and then the first annular mold and the second annular mold are closed so that the two annular surfaces of the deforming mold are just in full contact with the two assembly surfaces of the edge assembly part 30 respectively, but not in contact with the center window 100.

[0043] S300: heating and pressing, heating the deformation mold to fully preheat the edge assembly part 30, and then controlling the press to close the deformation mold to a preset position to drive the edge assembly part 30 to diffuse, deform and thin outward, so as to obtain a self-reinforced polymer observation window of the edge assembly part 30.

[0044] Specifically, the heating structure of the deformation mold is first turned on, wherein the heating temperature is 100-200°C and the heating time is 1-2 hours, so that the edge assembly portion 30 of the blank 100 is fully heated while other parts are not heated. In practical applications, the heating temperature can be any value between 100-200°C, such as 120°C, 150°C, 170°C, 190°C, etc., and the heating time can be any value between 1-2 hours, such as 1.2 hours, 1.4 hours, 1.5 hours, 1.6 hours, 1.8 hours, etc.

[0045] Then the press is controlled to close the deformation die to the preset position at a speed of 0.1 to 100 mm / s. During the closing process, the edge assembly part 30 of the blank 100 is thinned and diffusely deformed toward the outside of the blank 100, and then the polymer chain segments are significantly oriented, achieving a self-reinforcement effect; the transition part 20 is thinned, the polymer chain segments are slightly oriented, and the strength does not change much; the central window 100 is never in contact with the surface of the annular die, and its original shape and optical quality can be maintained. After the closing is completed, the thickness of the edge assembly part 30 is reduced to 2 / 3 to 1 / 3 of the original thickness, and a self-reinforced polymer observation window of the assembly part is obtained.

[0046] During the closing process of the deformation die, the deformation die can realize forging, stretching, etc. of the edge assembly part 30, and the two assembly surfaces can be planarly deformed. After the edge assembly part 30 is thinned, its thickness is greater than or equal to the thickness of the central window 100.

[0047] The preparation method provided by the present invention realizes self-reinforcement of the edge assembly part 30 by configuring the blank 100 into a central window 100, a transition part 20 and an edge assembly part 30, and deforms and thins the edge assembly part 30 on a large scale by hot pressing. Moreover, since the edge assembly part 30 is connected to the central window 100 by forming a transition part 20 with an inclined surface rather than being directly connected, during hot pressing strengthening, the deformation of the edge assembly part 30 has little effect on the transition part 20 and basically has no effect on the central window 100. That is, the above-mentioned preparation method can realize self-reinforcement of the edge assembly part 30 of the polymer observation window while maintaining the original high optical and surface quality of the central window 100 area and controlling the quality of the transition part 20 to be intact, thereby ensuring the qualified rate of the polymer observation window with high edge strength and realizing low-cost manufacturing of the polymer observation window.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a polymer observation window, characterized in that: The following steps are involved: Making a blank, the blank comprising an integrally formed central window, a transition portion and an edge assembly portion, the edge assembly portion having two assembly surfaces arranged opposite to each other, the central window having a thickness smaller than that of the edge assembly portion, and the assembly surface and the central window being transitioned through the transition portion having an outer surface formed as an inclined surface; A blank assembly machine is used to mount the blank on a press having a deforming die, wherein the deforming die has two opposite annular surfaces, and the two annular surfaces are in full contact with the two assembly surfaces of the assembly part respectively; The forming process is heated and the deformation mold is heated to fully preheat the edge assembly part. Then, the press is controlled to close the deformation mold to a preset position to drive the edge assembly part to diffuse, deform and thin outward, thereby obtaining a polymer observation window with a self-reinforced edge assembly part.

2. The method for preparing a polymer observation window according to claim 1, characterized in that: In the polymer observation window, the angle between the inclined surface of the transition portion and the central axis of the central window body is 10 to 45 degrees.

3. The method for preparing a polymer observation window according to claim 1, characterized in that: During the heating press, the thickness of the edge assembly portion is reduced to 1 / 3 to 2 / 3 of the original thickness; and / or During the blank assembly process, the annular inner edge of the molding surface does not exceed the inner edge of the transition portion, and the outer edges all exceed the outer edge of the edge assembly portion.

4. The method for preparing a polymer observation window according to claim 1, characterized in that: In the heating and pressing step, the heating method is water heating, infrared heating or electric heating; and / or In the heating and pressing step, the heating temperature is 100-200° C. and the heating time is 1-2 hours; and / or The closing speed of the deformation die is 0.1-100 mm / s.

5. The method for preparing a polymer observation window according to claim 1, characterized in that: In the blank, two assembly surfaces of the edge assembly portion are curved surfaces and / or flat surfaces.

6. The method for preparing a polymer observation window according to claim 1, characterized in that: The raw materials of the blank include one or more of polycarbonate, polymethyl methacrylate, polyamide, polyether and polysulfone.

7. The method for preparing a polymer observation window according to claim 1, characterized in that: The blank can be prepared by injection molding, thermoforming or extrusion molding.

8. The method for preparing a polymer observation window according to claim 1, characterized in that: Along the circumference of the blank, a plurality of positioning columns are provided on one of the assembly surfaces of the edge assembly portion, and the edge assembly portion is adapted and positioned with the deformation die through the positioning columns.

9. The method for preparing a polymer observation window according to claim 1, characterized in that: During the heating and pressing step, two opposite assembly surfaces of the edge assembly portion undergo planar deformation.

10. A polymer observation window, characterized in that: The polymer observation window is prepared by the preparation method of any one of claims 1 to 9.

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