Inner snap-in injection molding device

Abstract

The present invention provides an inwardly buckled injection molding device for forming an injection molded body with an inward buckle. The injection molded body with an inward buckle includes a main body, a columnar cavity provided in the main body, and an inward buckle extending outward from the inner wall of the cavity. The inwardly buckled injection molding device includes an upper mold, a lower mold provided below the upper mold and formed with an injection groove, and a soluble salt chip provided in the injection groove. The soluble salt chip is used to form the inward buckle. The inwardly buckled injection molding device of the present invention can form the inward buckle in the cavity by providing the soluble salt chip, and the soluble salt chip can be removed by putting it into water after the injection molding is completed.

Description

Technical Field

[0001] The present invention relates to an internal snap injection molding device. Background Art

[0002] Some injection molded products need to form an internal snap structure, that is, an outwardly expanding opening is formed inside a cylindrical cavity. Existing injection molding processes are difficult to form because the injection molded block in the internal snap cannot be withdrawn after injection molding.

[0003] In view of this, it is necessary to improve the existing internal snap injection molding device to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an internal snap injection molding device to solve the problem that the existing technology cannot injection mold an internal snap.

[0005] To achieve the above purpose, the present invention provides an internal snap injection molding device for forming an injection molded body with an internal snap. The injection molded body with an internal snap includes a body, a columnar cavity provided in the body, and an internal snap extending outward from the inner wall of the cavity. The internal snap injection molding device includes an upper mold, a lower mold provided below the upper mold and formed with an injection groove, and a soluble salt chip provided in the injection groove. The soluble salt chip is used to form the internal snap.

[0006] As a further improvement of the present invention, the internal snap injection molding device further includes a support rod passing through the lower mold and protruding into the injection groove. The soluble salt chip is provided at one end of the support rod located in the injection groove.

[0007] As a further improvement of the present invention, a boss for placing the soluble salt chip is provided outward at one end of the support rod located in the injection groove. The diameters of the soluble salt chip, the support rod, and the boss decrease in sequence.

[0008] As a further improvement of the present invention, a positioning post protrudes from the side of the boss away from the support rod. A positioning hole is provided on the soluble salt chip. The positioning post passes through the positioning hole to position the soluble salt chip.

[0009] As a further improvement of the present invention, the injection molded body with an internal snap includes a connection hole penetrating through the periphery of the body. The lower mold is provided with a connection slider protruding upward toward the upper mold to form the connection hole.

[0010] As a further improvement of the present invention, the injection molded body with an internal snap includes a connection post protruding from the body toward the upper mold. The cavity is provided in the connection post. The upper mold is provided with a cavity slider protruding downward into the connection post to form a cavity. A positioning groove is provided on the connection post. A positioning block protruding radially outward to form the positioning groove is provided on the cavity slider.

[0011] As a further improvement of the present invention, the injection molded body with internal fasteners includes a clamping groove that is recessed inward on one side facing the upper mold. The upper mold is provided with a clamping block that protrudes downward toward the lower mold to form the clamping groove, and the clamping block is arranged between the connecting column and the connecting slider.

[0012] As a further improvement of the present invention, the injection molded body with internal fasteners includes fixing holes that penetrate through both ends of the body. The upper mold is provided with fixing sliders that protrude downward toward the lower mold to form the fixing holes.

[0013] As a further improvement of the present invention, the injection molded body with internal fasteners includes an oil injection hole that penetrates through the body and an oil injection groove that is recessed inward from one side of the body toward the upper mold. The oil injection hole is communicated with the oil injection groove. The upper mold is provided with an oil injection slider that protrudes downward toward the lower mold to form the oil injection groove, and an oil injection column that protrudes from one side of the oil injection slider facing the lower mold to form the oil injection hole.

[0014] As a further improvement of the present invention, the internal fastener injection molding device includes two injection molding grooves and an injection molding pipeline that communicates with the two injection molding grooves.

[0015] The beneficial effects of the present invention are as follows: The internal fastener injection molding device of the present invention can form internal fasteners in the cavity by setting a soluble salt chip, and the soluble salt chip can be removed by placing it in water after the injection molding is completed. The internal fastener injection molding device of the present invention has a simple structure, can effectively form internal fasteners, and has a low cost. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the internal fastener injection molding device of the present invention;

[0017] Figure 2 is a schematic structural diagram of an injection molded body with internal fasteners obtained by injection molding with the internal fastener injection molding device of the present invention;

[0018] Figure 3 is a schematic structural diagram of the oil injection slider of the internal fastener injection molding device of the present invention and an injection molded body with internal fasteners obtained by injection molding;

[0019] Figure 4 is a schematic structural diagram of the support rod of the internal fastener injection molding device of the present invention. Detailed Embodiments

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] As Figures 1 to 4 shown, the internal snap injection molding device 100 of the present invention is used to form an injection molded body 200 with internal snaps.

[0024] The internal snap injection molding device 100 includes an upper mold 2, a lower mold 1 disposed below the upper mold 2 and formed with an injection molding groove 11, a soluble salt chip 3 disposed in the injection molding groove 11, a support rod 4 passing through the lower mold 1 and protruding into the injection molding groove 11, and an injection molding pipe 5 communicating with the injection molding groove 11. The soluble salt chip 3 is used to form the internal snap 203.

[0025] The injection molded body 200 with internal snaps includes a body 201, a columnar cavity 202 disposed in the body 201, an internal snap 203 extending outward from the inner wall of the cavity 202, a connection hole 204 penetrating through the periphery of the body 201, a connection post 205 protruding from the body 201 toward the upper mold 2, a clamping groove 206 recessed inward on the side facing the upper mold 2, a fixing hole 207 penetrating through both ends of the body 201, an oil injection hole 208 penetrating through the body 201, and an oil injection groove 209 recessed inward from the side of the body 201 facing the upper mold 2. In this embodiment, the injection molded body 200 with internal snaps is an engine base.

[0026] The cavity 202 is disposed in the connection post 205, and a positioning groove 210 is formed on the connection post 205.

[0027] The oil injection hole 208 communicates with the oil injection groove 209.

[0028] The number of the injection molding grooves 11 is two, and the injection molding pipeline 5 communicates with the two injection molding grooves 11 to injection mold the injection molded body 200 with internal buckles. In this embodiment, by providing the two injection molding grooves 11, two injection molded bodies 200 with internal buckles can be injection molded simultaneously.

[0029] One end of the support rod 4 located in the injection molding groove 11 is provided with a boss 41 for placing the soluble salt chip 3 outward.

[0030] The boss 41 protrudes with a positioning post 42 toward a side away from the support rod 4.

[0031] The soluble salt chip 3 is provided with a positioning hole 31, and the positioning post 42 penetrates through the positioning hole 31 to position the soluble salt chip 3. The diameters of the soluble salt chip 3, the support rod 4, and the boss 41 decrease in sequence. In this embodiment, the soluble salt chip 3 is made of sodium chloride, which has low cost and can dissolve by itself in water after the injection molding is completed, thereby forming the internal buckle 203 structure.

[0032] The lower mold 1 is provided with a connecting slider 12 protruding upward toward the upper mold 2 to form the connecting hole 204.

[0033] The upper mold 2 is provided with a cavity slider 21 protruding downward toward the lower mold 1 to enter the connecting column 205 to form a cavity, a clamping block 22 protruding downward toward the lower mold 1 to form a clamping groove 206, a fixing slider 23 protruding downward toward the lower mold 1 to form the fixing hole 207, and an oil injection slider 24 protruding downward toward the lower mold 1 to form the oil injection groove 209.

[0034] The cavity slider 21 is provided with a positioning block 211 protruding radially outward to form a positioning groove 210.

[0035] One side of the oil injection slider 24 protruding downward toward the lower mold 1 is provided with an oil injection post 241 for forming the oil injection hole 208.

[0036] The clamping block 22 is arranged between the connecting column 205 and the connecting slider 12, and both sides thereof are respectively abutted against the connecting column 205 and the connecting slider 12. The number of the connecting sliders 12 is four.

[0037] For the internal buckle injection molding device 100 of the present invention, by providing the soluble salt chip 3, the internal buckle 203 in the cavity 202 can be formed, and the soluble salt chip 3 can be removed after being placed in water after the injection molding is completed. The internal buckle injection molding device 100 of the present invention has a simple structure, can effectively form the internal buckle 203, and has low cost.

[0038] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0039] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An internal buckle injection molding device for forming an injection molded body with an internal buckle. The injection molded body with an internal buckle includes a body, a columnar cavity provided in the body, and an internal buckle extending outward from the inner wall of the cavity. Characterized in that: The internal buckle injection molding device includes an upper mold, a lower mold provided below the upper mold and formed with an injection molding groove, a soluble salt chip provided in the injection molding groove, and a support rod penetrating the lower mold and protruding into the injection molding groove. The soluble salt chip is used to form the internal buckle. The soluble salt chip is provided at one end of the support rod located in the injection molding groove. A boss for placing the soluble salt chip is provided outward at one end of the support rod located in the injection molding groove. The diameters of the soluble salt chip, the support rod, and the boss decrease in sequence. A positioning post protrudes from the side of the boss away from the support rod. A positioning hole is provided on the soluble salt chip. The positioning post penetrates the positioning hole to position the soluble salt chip. The injection molded body includes a connection hole penetrating the periphery of the body, a connection post protruding from the body towards the upper mold, and a clamping groove recessed inward on the side facing the upper mold. The lower mold is provided with a connection slider protruding towards the upper mold to form the connection hole. The cavity is provided in the connection post. The upper mold is provided with a cavity slider protruding towards the lower mold and entering the connection post to form a cavity. A positioning groove is provided on the connection post. A positioning block protruding radially outward to form the positioning groove is provided on the cavity slider. The upper mold is provided with a clamping block protruding towards the lower mold to form the clamping groove. The clamping block is provided between the connection post and the connection slider.

2. The internal buckle injection molding device according to claim 1, Characterized in that: The injection molded body with an internal buckle includes a fixing hole penetrating both ends of the body. The upper mold is provided with a fixing slider protruding towards the lower mold to form the fixing hole.

3. The internal buckle injection molding device according to claim 2, Characterized in that: The injection molded body with an internal buckle includes an oil injection hole penetrating the body and an oil injection groove recessed inward from one side of the body towards the upper mold. The oil injection hole is communicated with the oil injection groove. The upper mold is provided with an oil injection slider protruding towards the lower mold to form the oil injection groove. An oil injection post for forming the oil injection hole protrudes from the side of the oil injection slider facing the lower mold.

4. The internal buckle injection molding device according to claim 1, Characterized in that: The internal buckle injection molding device includes two injection molding grooves and an injection molding pipeline communicated with the two injection molding grooves.

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