Modularized laying process for silica gel product of thermal diaphragm vulcanization process

Abstract

The invention relates to the related fields of high polymer materials and machining, in particular to a silica gel product modular layering process of a thermal diaphragm vulcanization process. The technical problems that under the thermal diaphragm technology, the paving corners of rectangular silica gel sheet raw materials have the wrinkle defect, and the silica gel sheet is cut into pieces without the wrinkle risk but the crack risk contradiction is increased are solved. According to the scheme, on the premise of a thermal diaphragm vulcanization process, a rectangular silica gel raw material sheet is carved and cut into modular silica gel material blocks according to modular silica gel blanking and typesetting, the modular silica gel material blocks are put into a thermal diaphragm vulcanization forming mold according to a silica gel product modular layering pattern of the thermal diaphragm vulcanization process, and the modular silica gel material blocks are placed in a hot diaphragm vulcanization forming mold in an autoclave. And forming a silica gel product in a specific form through thermal expansion and vulcanization. According to the silica gel product modular layering process for the thermal diaphragm vulcanization process, through a brand-new designed cutting process, the problem that in the thermal diaphragm vulcanization process, the manufacturability requirement that crushed materials of a silica gel sheet need to be reduced is contradicted with wrinkles at the laying corners of raw materials of the rectangular silica gel sheet is solved.

Description

Technical Field

[0001] The invention relates to the field of polymer materials and mechanical processing, and in particular to a modular layering process of silicone products using a hot diaphragm vulcanization process. Background Art

[0002] The hot diaphragm vulcanization process has a simple mold and is an economical vulcanization molding method. The hot diaphragm is stretched through the vacuum negative pressure of the autoclave to transmit pressure to the material in all directions, and the material is vulcanized and molded during the heating process. Usually when cutting materials, wrinkles will occur at the corners of the rectangular silicone sheet raw materials, while there is no risk of wrinkles when the silicone sheet is cut into pieces, but the processability is poor. Therefore, in order to overcome the above problems, it is necessary to develop a technical solution that can effectively avoid wrinkles at the corners of the rectangular silicone sheet raw materials and overcome the poor processability of the cut silicone sheet. Summary of the invention

[0003] The present invention aims to solve the technical problem that wrinkle defects may occur at the corners of rectangular silicone sheet raw materials during laying under the hot diaphragm process, while there is no risk of wrinkles when the silicone sheet is cut into pieces but the risk of cracks is increased. A modular laying process for silicone products in a hot diaphragm vulcanization process is provided.

[0004] The present invention is implemented by adopting the following technical scheme: a modular plying process for silicone products by a hot diaphragm vulcanization process, in which rectangular silicone raw material sheets are carved and cut into the specific shape of modular edge silicone blocks according to the specific cutting path of the modular silicone blanking layout, and the modular edge silicone blocks are laid out in the specific shape of the modular plying diagram of the silicone products by the hot diaphragm vulcanization process, and silicone products of a specific form are formed through thermal expansion and vulcanization.

[0005] Furthermore, the modular silicone blanking layout comprises the following steps: for any corner portion on the perimeter that needs to be blanked, define the intersection of any two planes and / or curved surfaces or the tangent of the curve at the intersection of the intersection as an edge line, and define the angle between any two edge lines as α; If there is α-180°>0 Then the part should be separated into at least two modules; If all α-180° of this part is ≤ 0, Then the part is no longer separated and is defined as a unit module; For unit modules The common angle of three intersecting surfaces on the unit module is defined as an edge angle, the number of which is β, which is a natural number, and the three intersecting surfaces are planes or curved surfaces; If β=0, the module is not pruned; If β ≥ 0, then C = β; C is the number of cutting lines along the edge to the corner. Among the edges related to the three intersecting surfaces, find C edges that can unfold the unit module into a plane as cutting lines, and simulate cutting. Expand the unit module to obtain the design drawing of the modular silicone material block around the edges and corners; according to the design drawing, cut out the silicone material blocks around the edges and corners on the rectangular silicone raw material sheet.

[0006] Furthermore, at least one section of silicone block is cut out between two adjacent corners on the peripheral edge.

[0007] Furthermore, the modular ply pattern of the silicone product is designed in a specific shape, with gaps reserved between each section of silicone material block.

[0008] The modular plying process of silicone products in the hot diaphragm vulcanization process described in the present invention effectively solves the contradiction between the process requirement that silicone sheets should reduce scraps in the hot diaphragm vulcanization process and the corner wrinkles of rectangular silicone sheet raw materials during paving by designing a scientific and standardized cutting method, and at the same time provides a new idea for the hot diaphragm vulcanization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Schematic diagram of the modular silica gel block structure of the present invention.

[0010] Figure 2 Schematic diagram of modular silicone rubber cutting and layout according to the present invention.

[0011] Figure 3 Modular layup diagram of silicone products for hot diaphragm vulcanization process.

[0012] Figure 4 Schematic diagram of a specific form of a hot diaphragm vulcanization process silicone product.

[0013] Figure 5 Schematic diagram of the material feeding position in the embodiment.

[0014] Figure 6 Schematic diagram of a unit module in an embodiment.

[0015] Figure 7 Schematic diagram of cutting in the embodiment (C=β=2).

[0016] Figure 8 Structural diagram of modular silicone blocks at the edges and corners of the embodiment. DETAILED DESCRIPTION

[0017] The main innovation of the present invention is that: under the premise of hot diaphragm vulcanization process, the rectangular silicone raw material sheet is cut into modular silicone material blocks according to the modular silicone blanking layout, and the modular silicone material blocks are placed into the hot diaphragm vulcanization molding mold according to the modular layer diagram of silicone products in the hot diaphragm vulcanization process. In the autoclave, a silicone product of a specific form is formed through thermal expansion and vulcanization. At least one section of silicone material block is cut out between two adjacent corners on the edge; the modular layer diagram of the silicone product is designed according to the shape of a specific form, and gaps between each section of silicone material block are reserved on it.

[0018] Figure 1 The structure of each silicone block after cutting for a silicone product of a certain shape is shown, wherein the modular silicone cutting layout of the edge described in this application is mainly aimed at cutting the edge and corner positions of the edge. Figure 1 K1 and K9 are the silicone blocks cut from the corners. K2, K6, K7, and K8 are the middle parts of the corners, which are generally long strips in shape and have no strict quantity requirements. K5 and K11 are the base silicone blocks in the center of the edge, which are generally placed in the center of the edge during thermal expansion and vulcanization.

[0019] Figure 2 The figure shows the silicone blocks needed to form a complete silicone product of a specific shape. The scientific and standardized cutting method is adopted to greatly save raw materials.

[0020] Figure 3 In the middle, Figure 2 After the silicone blocks are laid out, a certain gap is left between each section of the silicone blocks to facilitate slight deformation of the silicone blocks during vulcanization molding.

[0021] Figure 4 It is a silicone product with a specific shape formed by hot diaphragm vulcanization process.

[0022] Combination Figure 5-8 The specific embodiment of the modular silicone blanking layout (for the edge and corner positions) of the present invention is as follows: The modular edge silicone material block is designed according to the geometric structure of the silicone product of the hot diaphragm vulcanization process. The modular layering process of the silicone product of the hot diaphragm vulcanization process applies the traditional origami cutting technology to the material design of the silicone product block, forming a set of material cutting methods: like Figure 5 As shown in the figure, for any part of the edge that needs to be cut, the intersection line of any two faces (plane or curved surface) (or the tangent line of the curve at the intersection point) is defined as the edge line, and the angle between any two edge lines is α. If there is α-180°>0 but This part should be separated into at least two modules; If all α-180° of this part is ≤ 0, Then the part is no longer separated and is defined as a unit module; like Figure 6 As shown, for the unit module ( Figure 5 Partial zoom of the corner) The common angle of three intersecting faces (planes or curved surfaces) on the surrounding edge is defined as the edge angle, and its number is β, which is a natural number.

[0023] If β=0, the module is not pruned; if β>0, then C=β.

[0024] like Figure 7 As shown, C is the number of cutting lines from the edge line to the corner, C=β=2, simulating cutting, and unfolding the unit module to obtain the design drawing of the modular edge silicone material block.

[0025] like Figure 8 As shown, after cutting, a modular silicone block for edge is obtained. When laying the layers, it is folded into corner shapes along the fold lines and assembled with other silicone blocks to form a complete silicone block for edge, and then the base plate is laid in the center.

Claims

1. A modular lamination process for silicone products using a hot diaphragm vulcanization process, characterized in that: The rectangular silicone raw material sheets are carved and cut into the specific shapes of modular edge silicone blocks according to the specific cutting paths of the modular silicone cutting layout. The modular edge silicone blocks are laid out in the specific shapes of the modular layup diagram of the silicone products in the hot diaphragm vulcanization process, and silicone products of specific shapes are formed through thermal expansion and vulcanization.

2. The modular lamination process of silicone products by hot diaphragm vulcanization process according to claim 1, characterized in that: The modular silicone blanking layout comprises the following steps: for any corner portion on the perimeter that needs to be blanked, defining the intersection of any two planes and / or curved surfaces or the tangent of the curve at the intersection of the intersection as an edge line, and defining the angle between any two edge lines as α; If there is α-180°>0 Then the part should be separated into at least two modules; If all α-180° of this part is ≤ 0, Then the part is no longer separated and is defined as a unit module; For unit modules The common angle of three intersecting surfaces on the unit module is defined as an edge angle, the number of which is β, which is a natural number, and the three intersecting surfaces are planes or curved surfaces; If β=0, the module is not pruned; If β>0, then C=β; C is the number of cutting lines along the edge to the corner. Among the edges related to the three intersecting surfaces, find C edges that can unfold the unit module into a plane as cutting lines, and simulate cutting. Expand the unit module to obtain the design drawing of the modular silicone material block around the edges and corners; according to the design drawing, cut out the silicone material blocks around the edges and corners on the rectangular silicone raw material sheet.

3. The modular lamination process of silicone products by hot diaphragm vulcanization process according to claim 2, characterized in that: At least one section of the silicone block is cut out between two adjacent corners on the surrounding edge.

4. The modular layering process of silicone products by hot diaphragm vulcanization process according to claim 3, characterized in that: The modular ply pattern of silicone products is designed in a specific shape, with gaps reserved between each section of silicone material blocks.

5. A modular lamination process for silicone products using a hot diaphragm vulcanization process as described in any one of claims 1 to 4, characterized in that: When the modular edge silicone material blocks are laid out in a specific shape according to the modular layering diagram of silicone products in the hot diaphragm vulcanization process, a bottom plate silicone material block is also laid out in the center of the modular edge silicone material blocks.

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