Nonmetal mold for preparing rubber foam board

Abstract

The utility model discloses a non-metallic mould for preparing a rubber foam board, which comprises two mould plates with different upper and lower positions, a shaping cavity for accommodating a rubber material is formed on the upper surface of each mould plate, a heat insulation surface capable of insulating heat is arranged on the inner bottom wall of each shaping cavity, and the bottom surface of the rubber material is in contact with the heat insulation surface. The top face of the sizing material is exposed in air, and a plurality of through holes penetrating through the lower surface of the mold plate are formed in the heat insulation face so that heat conduction in the environment can be achieved. The heat insulation layer and the heat insulation face on the heat insulation layer are arranged, heat is prevented from being directly transmitted to the rubber material through the metal outer frame, heat conduction in the environment is achieved through the through holes, and the heating efficiency of the side, making contact with the heat insulation face, of the rubber material is closer to the heating efficiency of the side, making contact with air in a drying oven, of the rubber material. Therefore, the situation that the foaming degree and the rubber mixing degree are greatly different from other parts due to local overheating of the contact surface is effectively avoided, and the performance of each part of a product is more balanced and unified.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a non-metal mold for preparing a rubber foam board. Background Art

[0002] Rubber foam sheet is a lightweight, porous material made from rubber through a foaming process. It has many excellent properties, such as good thermal insulation, sound absorption, cushioning and wear resistance. Rubber foam sheet is widely used in many fields, including construction, automobiles, sports equipment and daily necessities. The preparation of rubber foam sheet includes the processes of rubber foaming and rubber vulcanization.

[0003] like Figure 5 As shown, in the conventional technology, a metal mold 6 having a mold cavity 8 is used to prepare a rubber foam board, and the bottom of the mold cavity 8 has a contact surface 7 that contacts the rubber material 2. The rubber material 2 is then placed in the mold cavity 8 of the metal mold 6, and the metal mold 6 and the rubber material 2 are sent into an oven together. The rubber material 2 generates expansion force under high temperature due to the high-temperature decomposition of the foaming agent to form pores. However, when this mold is used, one side of the rubber material 2 contacts the contact surface of the metal mold, and the other side contacts the air in the oven. The two surfaces are heated unevenly, which leads to the situation that the local overheated part of the rubber material 2 has insufficient foaming but has begun to vulcanize and cure, resulting in a large difference in the surface and internal performance of the product, and even a large internal stress is formed between the surface and the inside, thereby affecting the appearance, performance and service life of the product, and thus failing to prepare a qualified and ideal product. Therefore, a non-metallic mold for preparing a rubber foam board is proposed to solve the above problems. Summary of the invention

[0004] The utility model aims to provide a non-metallic mold for preparing a rubber foam plate to solve the problems raised in the above-mentioned background technology.

[0005] The present application embodiment adopts the following technical solutions:

[0006] A non-metallic mold for preparing a rubber foam board comprises two mold plates at different upper and lower positions, wherein a molding cavity for accommodating a rubber material is formed on the upper surface of the mold plate, an inner bottom wall of the molding cavity is provided with an insulating surface that can insulate heat, the bottom surface of the rubber material contacts the insulating surface, the top surface of the rubber material is exposed to the air, and a plurality of through holes penetrating the lower surface of the mold plate are provided on the insulating surface to realize heat conduction in the environment.

[0007] Preferably, the mold plate includes a metal outer frame and a heat insulating layer connected to the metal outer frame.

[0008] Preferably, an installation cavity is opened on the upper surface of the metal outer frame, and the surface of the heat insulation layer is fixedly connected to the inner wall of the installation cavity.

[0009] Preferably, a first heat transfer hole is opened on the inner bottom wall of the installation cavity, a second heat transfer hole is opened on the upper surface of the insulation layer, and the positions of the first heat transfer hole and the second heat transfer hole correspond, and the through hole is formed by splicing the first heat transfer hole and the second heat transfer hole.

[0010] Preferably, a plurality of the through holes are arranged in a rectangular array on the heat insulation surface, and the distance between two adjacent through holes in the positive direction of the x-axis and the y-axis is 3 mm.

[0011] Preferably, the metal outer frame is made of 45# steel.

[0012] Preferably, the thermal conductivity of the thermal insulation layer is lower than that of metal, and the thermal insulation layer is made of epoxy resin board, aerogel composite modified ceramic fiber felt, aerogel composite modified wet-process glass fiber felt or high temperature resistant acrylic.

[0013] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0014] Firstly, in the utility model, by providing an insulating layer and an insulating surface on the insulating layer, heat is prevented from being directly transferred to the rubber material through the metal outer frame, and by providing through holes, heat conduction in the environment is achieved, so that the heating efficiency of the side where the rubber material contacts the insulating surface is closer to that of the side where the rubber material contacts the air in the oven, so that the foamed rubber compound is heated more evenly during the processing, thereby effectively avoiding the situation where local overheating of the contact surface causes excessive differences in the degree of foaming and the degree of refining compared with other parts, and making the performance of each part of the product more balanced and uniform.

[0015] Secondly, in the utility model, a metal outer frame is provided, which serves as a supporting skeleton, so that the insulation layer, which originally has a low overall strength level, is supported and its appearance is maintained, and it can still maintain its original shape without deformation when the rubber foaming generates expansion force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 : A three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 The following is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 The utility model is a schematic diagram of a front section structure;

[0020] Figure 4For: the utility model Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 5 : A three-dimensional structural diagram of the prior art of the utility model.

[0022] In the figure: 1. mold plate; 101. metal outer frame; 102. insulation layer; 103. installation cavity; 104. first heat transfer hole; 105. second heat transfer hole; 2. adhesive; 3. molding cavity; 4. insulation surface; 5. through hole; 6. metal mold; 7. contact surface; 8. mold cavity. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0025] See also Figure 1-5 The utility model provides a non-metallic mold technical solution for preparing a rubber foam board:

[0026] A non-metallic mold for preparing a rubber foam board comprises two mold plates 1 at different upper and lower positions, a molding cavity 3 for accommodating a rubber material 2 is formed on the upper surface of the mold plate 1, an inner bottom wall of the molding cavity 3 is provided with a heat-insulating surface 4, the bottom surface of the rubber material 2 contacts the heat-insulating surface 4, the top surface of the rubber material 2 is exposed to the air, and a plurality of through holes 5 penetrating the lower surface of the mold plate 1 are provided on the heat-insulating surface 4 to realize heat conduction in the environment.

[0027] Specifically, by providing a heat insulating surface 4, heat is prevented from being directly transferred to the rubber material 2 through the metal outer frame 101, and by providing a through hole 5, heat conduction in the environment is achieved, so that the heating efficiency of the side of the rubber material 2 in contact with the heat insulating surface 4 is closer to that of the side of the rubber material 2 in contact with the air in the oven, so that the foamed rubber mixed rubber material 2 is heated more evenly during the processing, thereby effectively avoiding the situation where local overheating of the contact surface causes excessive differences in the degree of foaming and the degree of mixing with other parts, so that the performance of each part of the product is more balanced and uniform.

[0028] The mold plate 1 includes a metal outer frame 101 and an insulating layer 102 connected to the metal outer frame 101. The metal outer frame 101 is provided to serve as a skeleton to support the insulating layer 102, which originally has a low overall strength level, so that the insulating layer 102 can be supported and its appearance can be maintained. When the rubber foaming generates expansion force, it can still maintain its original shape without deformation. The insulating layer 102 is used to insulate heat to prevent it from causing inconsistent heat transfer efficiency. The insulating surface 4 is formed on the insulating layer 102.

[0029] An installation cavity 103 is provided on the upper surface of the metal outer frame 101, and the surface of the insulation layer 102 is fixedly connected to the inner wall of the installation cavity 103. The installation cavity 103 is provided for installing the insulation layer 102. The molding cavity 3 is the area formed by the installation cavity 103 on the upper part of the insulation layer 102, which is used to accommodate the rubber material 2. When the rubber material 2 foams, its volume expands and fills the entire cavity of the molding cavity 3, so that a foamed rubber product with a specific volume structure can be obtained, such as a foamed sheet of a specific thickness.

[0030] A first heat transfer hole 104 is formed on the inner bottom wall of the installation cavity 103, and a second heat transfer hole 105 is formed on the upper surface of the insulation layer 102, and the positions of the first heat transfer hole 104 and the second heat transfer hole 105 correspond to each other. The through hole 5 is formed by splicing the first heat transfer hole 104 and the second heat transfer hole 105. The through hole 5 is formed by the cooperation of the first heat transfer hole 104 and the second heat transfer hole 105, so that hot air can circulate in the oven, so that the part where the rubber material 2 contacts the insulation surface 4 is heated.

[0031] A plurality of through holes 5 are arranged in a rectangular array on the insulation surface 4, and the spacing between two adjacent through holes 5 in the positive direction of the x-axis and the y-axis is 3 mm. Preferably, the spacing error range between two adjacent through holes 5 in the positive direction of the x-axis and the y-axis is controlled within 3 mm ± 0.05 mm. By controlling the hole spacing of the through holes 5 of the metal outer frame 101, stress deformation of the thin metal surface due to processing can be avoided.

[0032] The metal outer frame 101 is made of 45# steel, or other common metal materials.

[0033] The thermal conductivity of the insulation layer 102 is lower than that of the metal. The insulation layer 102 is made of epoxy resin board, aerogel composite modified ceramic fiber felt, aerogel composite modified wet glass fiber felt or high temperature resistant acrylic. The epoxy resin board can be a variety of non-metallic materials, including but not limited to epoxy resin board, aerogel composite modified ceramic fiber felt, aerogel composite modified wet glass fiber felt, high temperature resistant acrylic, etc., and its thermal conductivity is required to be much lower than that of metal.

[0034] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0035] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A non-metallic mold for preparing a rubber foam sheet, comprising two mold plates (1) at different upper and lower positions, wherein a molding cavity (3) for accommodating a rubber material (2) is formed on the upper surface of the mold plate (1), characterized in that: The inner bottom wall of the molding cavity (3) is provided with a heat-insulating surface (4), the bottom surface of the rubber material (2) is in contact with the heat-insulating surface (4), the top surface of the rubber material (2) is exposed to the air, and the heat-insulating surface (4) is provided with a plurality of through holes (5) penetrating the lower surface of the mold plate (1) to achieve heat conduction in the environment.

2. The non-metallic mold for preparing a rubber foam sheet according to claim 1, characterized in that: The mold plate (1) comprises a metal outer frame (101) and a heat insulating layer (102) connected to the metal outer frame (101).

3. The non-metallic mold for preparing a rubber foam sheet according to claim 2, characterized in that: An installation cavity (103) is provided on the upper surface of the metal outer frame (101), and the surface of the heat insulating layer (102) is fixedly connected to the inner wall of the installation cavity (103).

4. The non-metallic mold for preparing a rubber foam sheet according to claim 3, characterized in that: The inner bottom wall of the installation cavity (103) is provided with a first heat transfer hole (104), the upper surface of the insulation layer (102) is provided with a second heat transfer hole (105), and the positions of the first heat transfer hole (104) and the second heat transfer hole (105) correspond to each other, and the through hole (5) is formed by splicing the first heat transfer hole (104) and the second heat transfer hole (105).

5. The non-metallic mold for preparing a rubber foam sheet according to claim 1, characterized in that: A plurality of the through holes (5) are arranged in a rectangular array on the heat insulation surface (4), and the spacing between two adjacent through holes (5) in the positive directions of the x-axis and the y-axis is 3 mm.

6. The non-metallic mold for preparing a rubber foam sheet according to claim 2, characterized in that: The metal outer frame (101) is made of 45# steel.

7. The non-metallic mold for preparing a rubber foam sheet according to claim 2, characterized in that: The thermal conductivity of the thermal insulation layer (102) is lower than that of metal, and the thermal insulation layer (102) is made of epoxy resin board, aerogel composite modified ceramic fiber felt, aerogel composite modified wet-process glass fiber felt or high temperature resistant acrylic.

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