Cover plate and manufacturing method

Abstract

The invention discloses a cover plate and a manufacturing method, the cover plate has an electromagnetic shielding structure and comprises at least one substrate layer and at least one shielding layer, each substrate layer comprises thermoplastic non-woven fabric and continuous fiber fabric, the thermoplastic non-woven fabric and the continuous fiber fabric are laminated, and the shielding layer is laid on one side of the substrate layer. The cover plate is formed by pressing a shielding layer, a thermoplastic non-woven fabric and a continuous fiber fabric in one step through a mold, the cover plate is manufactured through the shielding layer, the thermoplastic non-woven fabric and the continuous fiber fabric, the cover plate can be used for a new energy automobile, the light weight can be achieved, meanwhile, the high strength requirement is met, and the overall electromagnetic shielding effectiveness reaches 50 dB or above within 20 Hz-2 GHz.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon fibers, in particular to a cover plate with a shielding structure and a manufacturing method. BACKGROUND

[0002] Lightweighting of new energy vehicles is an important technical means for energy saving, consumption reduction and increasing the cruising range of new energy vehicles. For every 10% weight reduction, the cruising range will increase by about 5%-6%. The application of lightweight new materials is the key to the lightweighting of new energy vehicles. Common lightweight materials include high-strength steel, aluminum alloy, magnesium alloy, titanium alloy and other metal materials, and thermoplastic composite materials and other non-metallic materials. Aluminum-magnesium alloy is a common lightweight metal material. Compared with steel alloy, it has the advantages of low density, high lightness, high elasticity, high impact resistance, easy coloring, etc. However, compared with composite materials, it is heavier, and aluminum-magnesium alloy cannot be used in insulating scenarios. Although foamed materials are light in weight, they are difficult to use as load-bearing and structural components. Continuous fiber composite materials stand out in the application of new energy vehicles due to their lighter weight, higher strength and better corrosion resistance.

[0003] Automotive electronic devices are becoming more and more rich and integrated, and the protection of automotive electromagnetic interference from the outside world has become a problem of great concern. In particular, the engine electronic control system is the most critical part of the vehicle, which determines the safe driving of the vehicle. In order to enable the vehicle to work normally and safely, the electromagnetic protection of the engine cannot be ignored. In the prior art, the material of the automobile cover plate is mostly pure aluminum sheet metal or pure magnesium aluminum alloy. The automobile cover plate is formed by stamping pure aluminum sheet metal, which has general electromagnetic shielding performance and is relatively heavy, affecting the cruising range of the vehicle. The strength of aluminum material is low, and if the strength is increased, the weight will also increase. The automobile cover plate is formed by die casting pure magnesium aluminum alloy. Pure magnesium aluminum alloy material is brittle and needs to be designed with reinforcing ribs to increase the strength, and the electromagnetic shielding performance is general. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the present application is to provide a cover plate and a manufacturing method. The cover plate can be used in new energy vehicles, mobile robots and other occasions to achieve lightweighting while meeting higher strength requirements.

[0005] In order to achieve the above-mentioned purposes, the technical scheme adopted by the present application is as follows:

[0006] A cover plate having an electromagnetic shielding structure, the cover plate comprising:

[0007] at least one base layer, each base layer comprising a thermoplastic flexible base material,

[0008] one or more shielding layers laid on one side of the base layer.

[0009] In an embodiment, the thermoplastic flexible substrate material comprises a thermoplastic nonwoven fabric and a continuous fiber fabric, and the thermoplastic nonwoven fabric and the continuous fiber fabric are laminated together.

[0010] Preferably, the thermoplastic flexible substrate material comprises at least one of a thermoplastic resin substrate fabric, a nonwoven fabric film, and a particle, or a combination thereof, and the thermoplastic resin substrate fabric, the nonwoven fabric film, and the particle are laminated with a continuous fiber fabric.

[0011] The substrate layers and the shielding layers are alternately laminated.

[0012] In an embodiment, the substrate layer comprises 30-70 parts of a thermoplastic nonwoven fabric and 30-70 parts of a continuous fiber fabric, and preferably, the substrate layer comprises 45-55 parts of a thermoplastic nonwoven fabric and 45-55 parts of a continuous fiber fabric.

[0013] In an embodiment, the shielding layer material comprises at least one of a steel mesh, a nickel mesh, a copper foil, a nickel foil, a shielding cloth, a copper mesh, an aluminum mesh, an aluminum foil, or a combination thereof, or a metal oxide film layer (such as indium oxide, zinc oxide, tin oxide, etc.) or a carbon-based film (such as a graphene film) plated thereon.

[0014] The application also provides a manufacturing method of the cover plate, which comprises the following steps:

[0015] Providing at least one substrate layer, and each substrate layer comprises a thermoplastic flexible substrate material;

[0016] Providing at least one shielding layer;

[0017] Laminating the at least one shielding layer and the at least one substrate layer together by a molding process. In an embodiment, the laminating the at least one shielding layer and the at least one substrate layer together by a molding process comprises:

[0018] Interleaving a plurality of the substrate layers and the shielding layers.

[0019] In an embodiment, the step of preparing the substrate layer comprises:

[0020] Preparation of a thermoplastic nonwoven fabric: melting and extruding a thermoplastic resin to form a molten polymer attached to and infiltrated into fibers, and obtaining the thermoplastic nonwoven fabric after cooling; or

[0021] Placing the prepared preform in a mold for shaping, and the preform comprises at least one of a unidirectional tape, a fabric, or a plate, or a combination thereof,

[0022] Then, laminating the prepared thermoplastic nonwoven fabric and the continuous fiber fabric together.

[0023] In an embodiment, the thermoplastic resin comprises at least one of PA6, PE, PPE, PPA, ABS, PA66, PPS, PC, PEEK, PEKK, PP and PA or a combination thereof.

[0024] In an embodiment, the continuous fiber fabric comprises at least one of carbon fiber, glass fiber, basalt and aramid fiber or a combination thereof.

[0025] In an embodiment, the pressing together of the at least one shielding layer and the at least one base layer by the molding process comprises:

[0026] preheating the mold to a first preset temperature;

[0027] introducing the shielding layer and the base layer into the preheated mold according to a preset stacking order;

[0028] closing the mold, heating the mold to the first preset temperature, pressurizing to a first preset pressure, and maintaining the temperature and pressure for a first preset time;

[0029] cooling the mold and opening the mold to take out the product.

[0030] Advantages

[0031] The cover plate in the present application can achieve lightweight while meeting the higher strength requirements, and the overall electromagnetic shielding effectiveness can reach 50dB or above in the range of 20Hz-2GHz.

[0032] The shielding layer is arranged to reduce electromagnetic interference, thereby ensuring that the device can work normally and safely. The base layer is composed of thermoplastic non-woven fabric and continuous fiber fabric, so that the entire cover plate is light in weight, low in cost and high in structural strength. Meanwhile, the thermoplastic non-woven fabric can be recycled multiple times (the thermoplastic non-woven fabric in the present application can be recycled more than 6 times), thereby playing a role in energy saving and environmental protection.

[0033] In the cover plate in the present application, the shielding layer and the base layer (such as thermoplastic non-woven fabric and continuous fiber fabric) are pre-impregnated and formed by heating in a mold, and then cut and formed in one step. Since the thermoplastic non-woven fabric and the continuous fiber fabric have good toughness, the thermoplastic non-woven fabric and the continuous fiber fabric are not prone to misalignment when pressurized, thereby improving the forming effect of the product. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the technical scheme of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical scheme of the present application, and do not constitute a limitation on the technical scheme of the present application. The shapes and sizes of the components in the drawings do not reflect the true proportions, and the purpose is only to schematically illustrate the content of the present application.

[0035] Figure 1 A layer structure diagram of a cover plate provided for an embodiment of the present application is shown in FIG. 1.

[0036] Figure 2 A flow chart of a manufacturing method of a cover plate provided for an embodiment of the present application is shown in FIG. 2.

[0037] Figure 3 A flow chart of a manufacturing method of a cover plate provided for another embodiment of the present application is shown in FIG. 3. DETAILED DESCRIPTION

[0038] The above-mentioned solutions will be further described in connection with the following embodiments. It should be understood that the embodiments are used to explain the present application and not to limit the scope of the present application. The implementation conditions used in the embodiments can be further adjusted according to the specific conditions of the manufacturer, and the implementation conditions not mentioned are usually the conditions in the conventional experiments.

[0039] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure shall have the ordinary meaning understood by a person of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and similar terms used in the embodiments of the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "comprise", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms do not mean only physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this document, "electrically connected" includes the case where the constituent elements are connected together through an element having a certain electrical effect. The element having a certain electrical effect is not particularly limited as long as it can perform the transmission of electrical signals between the constituent elements to be connected. The element having a certain electrical effect may, for example, be an electrode or a wiring, or a switching element such as a transistor, or another functional element such as a resistor, an inductor, or a capacitor. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0040] In the present application, the terms "upper", "lower", "inner", "middle", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to have a particular orientation, or to be constructed and operated in a particular orientation.

[0041] The application discloses a cover plate and a manufacturing method, which can be used in a new energy automobile or a mobile robot, and comprises at least one base layer and at least one shielding layer, each base layer comprises a thermoplastic flexible base material (such as a thermoplastic non-woven fabric or a continuous fiber fabric), the thermoplastic non-woven fabric and the continuous fiber fabric are arranged in layers, and the shielding layer is arranged on one side of the base layer. The thermoplastic non-woven fabric can be formed into a flame-retardant thermoplastic resin woven fabric based on a weaving, knitting or braiding process, a thermoplastic resin film based on a casting or biaxial stretching process, or a thermoplastic resin film based on a needling, water jetting or the like process.

[0042] The cover plate is formed by one-step molding of the shielding layer and the thermoplastic flexible base material (such as the thermoplastic non-woven fabric or the continuous fiber fabric) through a mold pressing process. Since the thermoplastic non-woven fabric has good toughness, elasticity and dimensional stability, the thermoplastic non-woven fabric is not prone to dislocation when the mold is pressed, thereby being beneficial to improving the forming effect of the product. The cover plate made of the shielding layer, the thermoplastic non-woven fabric and the continuous fiber fabric can achieve lightweight while meeting the higher strength requirement, and the overall electromagnetic shielding effectiveness reaches 50 dB or above in the range of 20 Hz to 2 GHz.

[0043] Next, the application will be described in combination with Figure 1 The application provides a cover plate.

[0044] The cover plate is mainly applied to a motor end cover or an electric control end cover, can achieve lightweight while meeting the higher strength requirement, and the overall electromagnetic shielding effectiveness can reach 50 dB or above in the range of 20 Hz to 2 GHz.

[0045] The cover plate comprises at least one base layer 10 and at least one shielding layer 20, each base layer 10 comprises a thermoplastic non-woven fabric 11 and a continuous fiber fabric 12, the thermoplastic non-woven fabric 11 and the continuous fiber fabric 12 are arranged in layers, and the shielding layer 20 is arranged on one side of the base layer 10.

[0046] The shielding layer is arranged to reduce electromagnetic interference, so that the equipment can work normally and safely. The base layer is composed of the thermoplastic non-woven fabric 11 and the continuous fiber fabric 12, so that the side of the cover plate of the equipment (such as the new energy automobile) away from the electric control or the motor has good insulation, and the entire cover plate of the new energy automobile is light in weight, low in cost and high in structural strength. Meanwhile, the thermoplastic non-woven fabric 11 can be recycled for more than six times, thereby playing a role in energy saving and environmental protection.

[0047] In an embodiment, the base layer 10 and the shielding layer 20 are alternately stacked, in practical application, the shielding layer is provided as one layer, and the shielding layer is located on the inner side of the cover plate, such as the shielding layer in the motor end cover is located on the side of the base layer close to the motor, the electric control end cover is located on the side of the base layer close to the electric control, at the same time, a plurality of shielding layers can also be selected and arranged according to the number of base layers and the shielding effect required by the cover plate, such as a shielding layer is arranged between two adjacent base layers, and at least one shielding layer is located on the inner side of the cover plate, the electromagnetic interference is reduced by arranging the shielding layer, so as to ensure that the new energy vehicle can work normally and safely.

[0048] The base layer 20 is composed of the thermoplastic non-woven fabric 11 and the continuous fiber fabric 12, in practical application, different numbers of base layers can be selected according to the thickness of the cover plate, so as to select different numbers of thermoplastic non-woven fabrics and continuous fiber fabrics, so that the side of the cover plate away from the electric control or the motor has good insulation, and the calculation formula of the number n of the base layer is: n = (a-b) / c, wherein the thickness of the cover plate is a, the thickness of the shielding layer plate is b, and the thickness of the base layer is c, n is rounded to an integer, in practical application.

[0049] As an optional embodiment, the thermoplastic non-woven fabric 11 is formed by a melt adhesion infiltration process of a thermoplastic resin; the thermoplastic non-woven fabric 11 formed by the melt adhesion infiltration process has good toughness, elasticity and dimensional stability, which is beneficial to the subsequent mold pressing of the plurality of thermoplastic non-woven fabrics, and because the base layer is composed of the thermoplastic non-woven fabric and the continuous fiber fabric, the base layer not only has good toughness, but also has good tensile property and impact resistance.

[0050] In the embodiment, the shielding layer includes a nickel foil or an aluminum foil, in order to further reduce the weight of the shielding layer, preferably, the shielding layer is a shielding cloth, or a plurality of hollow holes are arranged in the shielding layer, wherein the plurality of hollow holes account for 75%-80% of the area of the shielding layer, by arranging a plurality of hollow holes in the shielding layer, the weight of the shielding layer is reduced, and the overall weight of the cover plate is reduced, further, the plurality of hollow holes are arranged in an array on the shielding layer, or the plurality of hollow holes are arranged in a spiral on the shielding layer, both the two arrangement modes of the hollow holes have high uniformity, and the connection between the shielding layer and the base layer is more firm, specifically, the shielding layer includes one of a steel mesh, a nickel mesh and an aluminum mesh, wherein the copper mesh or the nickel mesh or the aluminum mesh has a mesh number of 190-210 meshes and a wire diameter of 0.4-0.5 mm, preferably, the copper mesh or the nickel mesh has a mesh number of 210 meshes and a wire diameter of 0.3 mm, which further reduces the weight of the shielding layer, and the weight of the cover plate is reduced, so as to reduce the weight of the vehicle body, and improve the endurance capacity, in the embodiment, the wire diameter of the copper mesh or the nickel mesh is 0.3 mm, which further reduces the thickness of the shielding layer, and the thickness of the entire electric control cover plate is reduced.

[0051] Next, a manufacturing method of a cover plate provided by an embodiment of the present application will be described in combination with Figure 2 the manufacturing method includes the following steps.

[0052] Preparation of the substrate layer: the thermoplastic member is stacked on the flexible substrate to obtain the substrate layer.

[0053] Mold pressing: the shielding layer and the substrate layer are pressed together by a mold pressing process.

[0054] It should be noted that the shielding layer and the substrate layer in the embodiment are formed by one step of the mold pressing process. The thermoplastic resin woven cloth or the thermoplastic resin film or the thermoplastic resin non-woven fabric and the continuous fiber fabric are pre-impregnated by heating in a mold and cut off to form the cover plate by one step. Since the thermoplastic non-woven fabric and the continuous fiber fabric have good toughness, the thermoplastic non-woven fabric and the continuous fiber fabric are not easy to dislocate when pressed, thereby improving the forming effect of the product.

[0055] In a specific embodiment, in actual application, the cover plate can include multiple substrate layers, thereby including multiple continuous fiber fabric layers and multiple flame-retardant thermoplastic resin layers. Therefore, the substrate layer preparation step needs to be repeated a preset number of times before the mold pressing step to obtain multiple substrate layers.

[0056] In a specific embodiment, the manufacturing method of the cover plate including multiple substrate layers includes the following steps.

[0057] Preparation of the substrate layer: multiple thermoplastic non-woven fabrics and multiple continuous fiber fabrics are laminated according to a preset stacking mode.

[0058] Mold pressing: the shielding layer and the substrate layer are pressed together by a mold pressing process.

[0059] In the embodiment, the manufacturing method further includes the following steps before the preparation of the substrate layer step.

[0060] Preparation of the thermoplastic non-woven fabric: the thermoplastic resin is melted and extruded to form a molten polymer and sprayed to form fibers, and the thermoplastic non-woven fabric is obtained after cooling. The thermoplastic non-woven fabric is formed by using the melt adhesion infiltration process, so that the thermoplastic non-woven fabric has good toughness and dimensional stability, which is beneficial to the subsequent mold pressing. At the same time, the thermoplastic non-woven fabric can be recycled multiple times, and can be recycled more than 6 times, thereby playing a role in energy saving and environmental protection.

[0061] In the embodiment, one or more substrate layers and the shielding layer can be cut before the mold pressing step, so that the mold can press the shielding layer and the substrate layer together.

[0062] In a specific embodiment, the thermoplastic resin includes, but is not limited to, at least one of PA6 (Nylon 6, Polycaprolactam), PE (Polyethylene), PPE (Polyphenylene ether), PPA (Polyphthalamide), ABS (Acrylonitrile butadiene styrene), PA66 (Nylon-66), PPS (Polyphenylene sulfide), PC (Polycarbonate), PEEK (Polyether ether ketone), PEKK (Polyether ketone ketone), PP (Polypropylene), and PA (Nylon), or a combination thereof. Preferably, the thermoplastic resin in the present application is selected from PA66. The continuous fiber fabric includes at least one of continuous carbon fiber fabric, continuous glass fiber fabric, continuous basalt fabric, and continuous aramid fiber fabric, or a combination thereof. In the present application, the continuous fiber fabric is used as a reinforcing body. The continuous fiber fabric is made of fibers, which include at least one of carbon fibers, glass fibers, basalt fibers, and aramid fibers, or a combination thereof. The glass fiber yarn, carbon fiber yarn, aramid fiber yarn, and basalt fiber are woven into a multi-directional and multi-angled fiber fabric by a weaving device. Preferably, the continuous fiber fabric is a continuous glass fiber fabric.

[0063] In the present embodiment, the multi-layer thermoplastic non-woven fabric and the multi-layer continuous fiber fabric are stacked on the shielding layer; that is, in a specific application, the inner surface of the cover plate has a shielding layer. This design is beneficial to enhancing the shielding effect of the cover plate. The multi-layer thermoplastic non-woven fabric and the multi-layer continuous fiber fabric are laminated in the [±45° / 0° / 90° / ±45°] layup mode. By laminating the thermoplastic non-woven fabric and the continuous fiber fabric in different directions, the cover plate can withstand forces from different directions, further enhancing the strength and stiffness.

[0064] In the present embodiment, the mold pressing step specifically includes:

[0065] The mold is preheated to 80-150°C (e.g., 100-120°C);

[0066] Preferably, a release agent can be sprayed on the surface of the mold, which is beneficial to the demolding of the subsequent product.

[0067] It should be noted that the preheating temperature required is different for different types of thermoplastic resins. For example, when the thermoplastic resin is PA66, the mold needs to be preheated to 100°C. When the thermoplastic resin is PPS, the mold needs to be preheated to 120°C.

[0068] The shielding layer and the base layer are introduced into the lower film of the preheated mold in the preset stacking order;

[0069] Here, the shielding layer is attached to the lower mold of the mold, and the base layer is arranged on the side of the shielding layer away from the lower mold of the mold.

[0070] The mold is closed, the mold is heated to 200-320℃, and is pressurized to 100MPa, and is kept at temperature and pressure for 60-100s.

[0071] It should be noted that the required temperature is different for different types of thermoplastic resin, for example, when the thermoplastic resin is PA66, the mold needs to be heated to 200℃, and when the thermoplastic resin is PPS, the mold needs to be heated to 200℃

[0072] The mold is cooled, opened, and the product is taken out.

[0073] In a specific embodiment, referring to Figure 3 The manufacturing method of the cover plate comprises the following steps:

[0074] At least one base layer is provided, each of the base layers comprising a thermoplastic flexible base material; the base layer is prepared by laying and laminating the thermoplastic non-woven fabric and the continuous fiber fabric in a predetermined stacking manner. In actual use, different numbers of base layers can be selected according to the thickness of the required cover plate, so as to select different numbers of thermoplastic non-woven fabric and continuous fiber fabric.

[0075] At least one shielding layer is provided; the shielding layer comprises at least one of steel mesh, copper foil, nickel foil, shielding cloth, copper mesh, aluminum mesh, aluminum foil, or a combination thereof, or a metal oxide film layer or a carbon-based film layer plated thereon.

[0076] Mold pressing, at least one shielding layer and at least one base layer are pressed together by mold pressing process.

[0077] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any equivalent transformation or modification made in the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A cover plate having an electromagnetic shielding structure, characterized in that: The cover plate comprises: at least one base layer, each base layer comprising a thermoplastic flexible base material, one or more shielding layers, the shielding layers being arranged on one side of the base layer.

2. The cover sheet of claim 1, wherein The thermoplastic flexible base material comprises at least one of a thermoplastic resin base fabric, a non-woven fabric film, a particle, or a combination thereof, which is laminated with a continuous fiber fabric; Preferably, the thermoplastic flexible base material comprises a thermoplastic non-woven fabric and a continuous fiber fabric, which are laminated together; the base layers and the shielding layers are alternately laminated together.

3. The cover plate of claim 2, wherein The base layer comprises 30-70 parts of a thermoplastic non-woven fabric and 30-70 parts of a continuous fiber fabric; Preferably, the base layer comprises 45-55 parts of a thermoplastic non-woven fabric and 45-55 parts of a continuous fiber fabric.

4. The cover plate of claim 1, wherein The shielding layer comprises at least one of a steel mesh, a copper foil, a nickel foil, a shielding cloth, a copper mesh, an aluminum mesh, an aluminum foil, or a combination thereof, or a metal oxide film layer or a carbon-based film layer plated thereon.

5. A method of manufacturing a cover plate, characterized by, The method comprises the following steps: providing at least one base layer, each base layer comprising a thermoplastic flexible base material; providing at least one shielding layer; molding, pressing at least one shielding layer and at least one base layer together by a molding process.

6. The manufacturing method of claim 5, wherein The step of pressing at least one shielding layer and at least one base layer together by a molding process comprises: interleaving and laminating a plurality of base layers and the shielding layer together in a predetermined order.

7. The manufacturing method of claim 5 or 6, wherein The step of preparing a base layer comprises: preparing a thermoplastic non-woven fabric by melting and extruding a thermoplastic resin to form a molten polymer adhering to and infiltrating fibers, and cooling to obtain the thermoplastic non-woven fabric; or placing a prepared preform in a mold to shape, the preform comprising at least one of a unidirectional tape, a fabric, or a plate, or a combination thereof, then laminating the prepared thermoplastic non-woven fabric and the continuous fiber fabric together.

8. The manufacturing method of claim 7, wherein The thermoplastic resin comprises at least one of PA6, PE, PPE, PPA, ABS, PA66, PPS, PC, PEEK, PEKK, PP, and PA, or a combination thereof.

9. The manufacturing method of claim 7, wherein The continuous fiber fabric comprises at least one of carbon fiber, glass fiber, basalt, and aramid fiber, or a combination thereof.

10. The manufacturing method of claim 5 or 6, wherein The step of pressing at least one shielding layer and at least one base layer together by a molding process comprises: preheating the mold to a first predetermined temperature; introducing the shielding layer and the base layer into the preheated mold in a predetermined stacking order; closing the mold, heating the mold to the first predetermined temperature, pressurizing to a first predetermined pressure, and maintaining the temperature and pressure for a first predetermined time; cooling the mold and opening the mold to take out the product.

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