Musical instrument box body opening flattening process

Abstract

The invention provides a musical instrument box body flattening process which comprises the following steps that S1, a box body mold and a flattening frame mold matched with the box body mold for use are manufactured respectively, and the edges of the box body mold and the flattening frame mold are matched concave-convex edges; s2, a carbon fiber material is shaped on the surface of the box body mold to manufacture a box body carbon fiber mold, and the inner surface of the box body carbon fiber mold is coated with a demolding material; s3, the soaking core material is attached to the position between the inner surface of the box body carbon fiber mold and the inner surface of the matched plain end frame mold, then the inner side of the plain end frame mold is coated with a demolding material, then a cut carbon fiber cloth layer is laid on the surface of the soaking core material, and the carbon fiber cloth layer is laid on the surface of the soaking core material; the box body carbon fiber mold and the matched plain-end frame mold are combined together and put into a vacuum bag to be subjected to vacuum treatment and curing treatment, and the musical instrument box body is manufactured after curing and shaping, concave-convex opening modeling and a plane-to-opening production process are adopted, no edge strip exists, and the appearance is more concise and elegant.

Description

Technical Field

[0001] The invention relates to the technical field of musical instrument case manufacturing, and in particular to a musical instrument case body flat-end process. Background Art

[0002] Existing musical instrument boxes are mainly made of ABS and PC thermoplastic thick plates by vacuum forming. Since they are made of thermoplastic thick plates, they are heavy and have average strength, rigidity and other properties, which affects the performance of the musical instrument box in protecting the musical instrument and also affects the user's sense of identity with the musical instrument box.

[0003] Existing foam boxes, wooden boxes, and fiberglass boxes. The foam boxes are all covered with cloth bags and zipper structures on the box mouth. The wooden box itself has a relatively thick shell. The traditional production process box body molds and flat-mouth frame molds mostly adopt an integral design. The edge processing often relies on additional side strips or edging to enhance stability and aesthetics. However, this design not only increases production costs, but may also affect the overall performance and durability of the box body due to loosening or falling off of the side strips or edging.

[0004] Therefore, it is necessary to provide a new musical instrument box body flat mouth process to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a flat-end process for a musical instrument case.

[0006] The flat-edge process of a musical instrument case provided by the present invention comprises the following steps: S1, separately manufacturing a case mold and a flat-edge frame mold used in conjunction with the case mold, wherein the edges of the case mold and the flat-edge frame mold are matched with concave and convex edges; S2, shaping the surface of the box body mold with a carbon fiber material to make a box body carbon fiber mold, and coating a demoulding material on the inner surface of the box body carbon fiber mold; S3, coating the demoulding material on the inner side of the flat frame mold, and then laying a layer of cut carbon fiber cloth layer, attaching the foam core material between the box body carbon fiber mold and the inner surface of the matching flat frame mold, and laying the carbon fiber cloth layer on the inner side of the flat frame mold on the surface of the foam core material; S4. Put the box body carbon fiber mold and the matching flat frame mold together into a vacuum bag, evacuate the vacuum bag, and then cure the vacuum-treated box body carbon fiber mold and the matching frame. After curing and shaping, the instrument box body is formed.

[0007] A further method is that the box body mold production includes the following steps: according to the shape of the box body, a clear edge is reserved to make an aluminum convex mold that is consistent with the size and shape of the box body, the aluminum convex mold is machined, and after the aluminum convex mold is made, it is first polished to remove the knife marks, and then a release agent is applied.

[0008] A further method is that the production of the flat-edge frame mold used in conjunction with the box body mold includes the following steps: reserving a clearing position according to the shape of the aluminum punch to make a concave mold that is consistent with the size and shape of the aluminum punch, using carbon cloth prepreg hand lay-up and high-temperature curing to make it, and trimming and polishing the formed frame to remove burrs and uneven parts on the surface, wherein one side of the concave mold is consistent with the size of the aluminum punch.

[0009] A further method, using the carbon fiber material to shape the surface of the box body mold includes the following steps: cutting the carbon fiber prepreg material into the required shape and size in advance, and then applying the cut carbon fiber prepreg to the mold surface layer by layer according to the process requirements and product shape to make a carbon fiber mold.

[0010] According to a further method, both the flat frame mould and the box body mould are made of aluminum alloy.

[0011] In a further method, the carbon fiber cloth layer is 0.1-0.5 mm thick, and the foam core material is 3-5 mm thick.

[0012] In a further method, the fixing treatment is carried out by heating and curing in a high-temperature curing furnace, the curing temperature is controlled at 120-160 degrees, the curing time is controlled at 60-240 minutes, and the mold is demoulded when the mold temperature drops to 60 degrees to obtain the instrument box body.

[0013] Compared with the related art, the flat-end process of the musical instrument box provided by the present invention has the following beneficial effects: 1. The flat-mouth process of the musical instrument box body of the present invention adopts the molding process of carbon fiber materials, which can make the prepared musical instrument box have the advantages of light weight, good strength and rigidity, and impact resistance.

[0014] 2. The edges of the box body mold (carbon mold) and the flat-mouth frame mold (aluminum concave mold) made by the present invention are matched with concave and convex edges, which ensure close fit to improve stability during the molding process on the one hand, and play a positioning role to improve processing accuracy on the other hand. The concave and convex mouth modeling and flat face mouth production process are adopted, and no additional edge strips or edging design are required, so that the appearance of the musical instrument box body is more simple and generous, and the production cost is also reduced.

[0015] 3. The flat-mouth process of the musical instrument box body of the present invention has a foam core material thickness of 3-5 mm. The foam layer can meet the strength requirements of the musical instrument box and can well protect the musical instrument.

[0016] 4. The flat-mouth process of the musical instrument box body of the present invention adopts a mold for molding, which can not only be customized according to the specific shape of the musical instrument, but also can keep the product performance and size of the musical instrument box stable, which is particularly suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A flowchart of the flat-end process of a musical instrument case provided by the present invention; Figure 2 A schematic diagram of the top structure of the box body mold provided by the present invention; Figure 3 A schematic diagram of the bottom structure of the box body mold provided by the present invention; Figure 4 A schematic diagram of the top structure of the flat frame mold provided by the present invention; Figure 5 A schematic diagram of the bottom structure of the flat frame mold provided by the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 ,in, Figure 1 A flowchart of the flat-end process of a musical instrument case provided by the present invention; Figure 2 A schematic diagram of the top structure of the box body mold provided by the present invention; Figure 3 A schematic diagram of the bottom structure of the box body mold provided by the present invention; Figure 4 A schematic diagram of the top structure of the flat frame mold provided by the present invention; Figure 5 A schematic diagram of the bottom structure of the flat frame mold provided by the present invention. Example

[0020] In the specific implementation process, Figure 1-Figure 5 As shown, the flat-mouth process of the musical instrument box body includes the following steps: S1, machining a box body mold (aluminum male mold) and a flat-mouth frame mold (aluminum female mold) with the same shape and size according to the shape and size of the product drawing, grinding with fine sandpaper to remove the knife marks after processing, and then heating the mold and applying a release agent for use; It should be noted that the production of the box body mold includes the following steps: according to the shape of the box body, a clear edge is reserved to make an aluminum convex mold that is consistent with the size and shape of the box body. The aluminum convex mold is machined. After the aluminum convex mold is made, it is first polished to remove the knife marks, and then a release agent is applied; It is further explained that the production of the flat-mouth frame mold used in conjunction with the box body mold includes the following steps: according to the shape of the aluminum convex mold, a clear edge position is reserved to make a concave mold that is consistent with the size and shape of the aluminum convex mold, and it is made by hand-laying and high-temperature curing of carbon cloth prepreg, and the formed frame is trimmed and polished to remove burrs and uneven parts on the surface, wherein one side of the concave mold is consistent with the size of the aluminum convex mold, and the other side of the concave mold is flat; S2. Cut the carbon fiber prepreg material into the required shape and size in advance, and then apply the cut carbon fiber prepreg to the mold surface layer by layer according to the process requirements and product shape to make a carbon fiber mold, and coat the release material (Kentian 255 release agent) on the inner surface of the box carbon fiber mold. The release agent will form a semi-permanent closed film on the mold surface to achieve a non-stick effect; S3. Lay a cut carbon fiber cloth layer on the inner side of the flat frame mold, attach the foam core material between the box body carbon fiber mold and the inner surface of the matching flat frame mold, and lay the carbon fiber cloth layer on the inner side of the flat frame mold on the surface of the foam core material, and finally apply a demoulding material; S4. Put the box body carbon fiber mold and the matching flat frame mold together into a vacuum bag, evacuate the vacuum bag, and then cure the vacuum-treated box body carbon fiber mold and the matching frame. The fixing treatment adopts heating and curing in a high-temperature curing furnace. The curing temperature is controlled at 120 degrees and the curing time is controlled for 60 minutes. When the mold temperature drops to 60 degrees, demoulding is performed to obtain the instrument box body.

[0021] It should be noted that the carbon fiber cloth layer is 0.1 mm and the thickness of the foam core material is 3 mm. Example

[0022] In the specific implementation process, the flat-mouth process of the musical instrument box body includes the following steps: S1, machining a box body mold (aluminum male mold) and a flat-mouth frame mold (aluminum female mold) with the same shape and size according to the shape and size of the product drawing, grinding with fine sandpaper to remove the knife marks after processing, and then heating the mold and applying a release agent for use; It should be noted that the production of the box body mold includes the following steps: according to the shape of the box body, a clear edge is reserved to make an aluminum convex mold that is consistent with the size and shape of the box body. The aluminum convex mold is machined. After the aluminum convex mold is made, it is first polished to remove the knife marks, and then a release agent is applied; It is further explained that the production of the flat-mouth frame mold used in conjunction with the box body mold includes the following steps: according to the shape of the aluminum convex mold, a clear edge position is reserved to make a concave mold that is consistent with the size and shape of the aluminum convex mold, and it is made by hand-laying and high-temperature curing of carbon cloth prepreg, and the formed frame is trimmed and polished to remove burrs and uneven parts on the surface, wherein one side of the concave mold is consistent with the size of the aluminum convex mold, and the other side of the concave mold is flat; S2. Cut the carbon fiber prepreg material into the required shape and size in advance, and then apply the cut carbon fiber prepreg to the mold surface layer by layer according to the process requirements and product shape to make a carbon fiber mold, and coat the release material (Kentian 255 release agent) on the inner surface of the box carbon fiber mold. The release agent will form a semi-permanent closed film on the mold surface to achieve a non-stick effect; S3. Lay a cut carbon fiber cloth layer on the inner side of the flat frame mold, attach the foam core material between the box body carbon fiber mold and the inner surface of the matching flat frame mold, and lay the carbon fiber cloth layer on the inner side of the flat frame mold on the surface of the foam core material, and finally apply a demoulding material; S4. Put the box body carbon fiber mold and the matching flat frame mold into a vacuum bag, evacuate the vacuum bag, and then cure the vacuum-treated box body carbon fiber mold and the matching frame. The fixing treatment adopts heating and curing in a high-temperature curing furnace. The curing temperature is controlled at 140 degrees and the curing time is controlled for 120 minutes. When the mold temperature drops to 60 degrees, demoulding is performed to obtain the instrument box body.

[0023] It should be noted that the carbon fiber cloth layer is 0.3mm and the thickness of the foam core material is 4mm. Example

[0024] In the specific implementation process, the flat-mouth process of the musical instrument box body includes the following steps: S1, machining a box body mold (aluminum male mold) and a flat-mouth frame mold (aluminum female mold) with the same shape and size according to the shape and size of the product drawing, grinding with fine sandpaper to remove the knife marks after processing, and then heating the mold and applying a coating agent for use; It should be noted that the production of the box body mold includes the following steps: according to the shape of the box body, a clear edge is reserved to make an aluminum convex mold that is consistent with the size and shape of the box body. The aluminum convex mold is machined. After the aluminum convex mold is made, it is first polished to remove the knife marks, and then a release agent is applied; It is further explained that the production of the flat-mouth frame mold used in conjunction with the box body mold includes the following steps: according to the shape of the aluminum convex mold, a clearing position is reserved to make a concave mold that is consistent with the size and shape of the aluminum convex mold, and the molded frame is trimmed and polished to remove burrs and uneven parts on the surface, wherein one side of the concave mold is consistent with the size of the aluminum convex mold, and the other side of the concave mold is flat; S2. Cut the carbon fiber prepreg material into the required shape and size in advance, and then apply the cut carbon fiber prepreg to the mold surface layer by layer according to the process requirements and product shape to make a carbon fiber mold, and coat the release material (Kentian 255 release agent) on the inner surface of the box carbon fiber mold. The release agent will form a semi-permanent closed film on the mold surface to achieve a non-stick effect; S3, coating the demoulding material on the inner side of the flat frame mold, and then laying a layer of cut carbon fiber cloth layer, attaching the foam core material between the box body carbon fiber mold and the inner surface of the matching flat frame mold, and laying the carbon fiber cloth layer on the inner side of the flat frame mold on the surface of the foam core material; S4. Put the box body carbon fiber mold and the matching flat frame mold together into a vacuum bag, evacuate the vacuum bag, and then cure the vacuum-treated box body carbon fiber mold and the matching frame. The fixing treatment adopts heating and curing in a high-temperature curing furnace. The curing temperature is controlled at 160 degrees and the curing time is controlled at 240 minutes. When the mold temperature drops to 60 degrees, demoulding is performed to obtain the instrument box body.

[0025] It should be noted that the carbon fiber cloth layer is 0.5 mm and the foam core material is 5 mm thick.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A musical instrument case flat-end process, characterized in that: The steps include: S1, respectively making a box body mold and a flat-mouth frame mold used in conjunction with the box body mold, wherein the edges of the box body mold and the flat-mouth frame mold have matching concave and convex edges; S2, shaping the surface of the box body mold with a carbon fiber material to make a box body carbon fiber mold, and coating a demoulding material on the inner surface of the box body carbon fiber mold; S3. Lay a cut carbon fiber cloth layer on the inner side of the flat frame mold, attach the foam core material between the box body carbon fiber mold and the inner surface of the matching flat frame mold, and lay the carbon fiber cloth layer on the inner side of the flat frame mold on the surface of the foam core material, and finally apply a demoulding material; S4. Put the box body carbon fiber mold and the matching flat frame mold together into a vacuum bag, evacuate the vacuum bag, and then cure the vacuum-treated box body carbon fiber mold and the matching frame. After curing and shaping, the instrument box body is formed.

2. The flat-end process of the musical instrument case according to claim 1, characterized in that: The box body mold production includes the following steps: according to the shape of the box body, a clear edge is reserved to make an aluminum convex mold that is consistent with the size and shape of the box body, the aluminum convex mold is machined, and after the aluminum convex mold is made, it is first polished to remove the knife marks, and then a release agent is applied.

3. The flat-end process of the musical instrument case according to claim 2, characterized in that: The production of the flat-edge frame mold used in conjunction with the box body mold includes the following steps: reserving a clearing position according to the shape of the aluminum punch to make a concave mold that is consistent with the size and shape of the aluminum punch, and machining it, trimming and grinding the formed frame to remove burrs and uneven parts on the surface, wherein one side of the concave mold is consistent with the size of the aluminum punch.

4. The flat-end process of the musical instrument case according to claim 3, characterized in that: The process of shaping the box body mold surface with the carbon fiber material comprises the following steps: cutting the carbon fiber prepreg material into a desired shape and size in advance, and then applying the cut carbon fiber prepreg to the mold surface layer by layer according to the process requirements and product shape to make a carbon fiber mold.

5. The flat-end process of the musical instrument case according to claim 4, characterized in that: The flat frame mould and the aluminium convex mould are both made of aluminium alloy.

6. The flat-end process of the musical instrument case according to claim 5, characterized in that: The carbon fiber cloth layer has a thickness of 0.1-0.5 mm, and the foam core material has a thickness of 3-5 mm.

7. The flat-end process of the musical instrument case according to claim 6, characterized in that: The fixing treatment adopts heating and curing in a high-temperature curing furnace, the curing temperature is controlled at 120-160 degrees, the curing time is controlled at 60-240 minutes, and the instrument box body is obtained by demoulding when the mold temperature drops to 60 degrees.

Images