Built-in hardware injection molding core-pulling mold

Abstract

The utility model relates to core -pulling mould technical field and disclose a built -in hardware injection core -pulling mould, including mould mechanism, the mould mechanism includes lower mould, upper die and the inner core of stretching into the inside of lower mould, still include drive mechanism, the drive mechanism includes support and the cylinder of driving to the inner core, and, the fixed sleeve of being connected on the cylinder and the drive rod of being connected on the inner core, and drive rod and fixed sleeve adopt bearing to be sleeved, drive rod is opened have the recess of thread -like, and the recess of drive rod has sunk the lug frame connected with support, adopt drive rod and the inner core are connected, cooperate on the lug frame is in the thread recess of drive rod, thereby let drive rod and inner core still will carry on the rotation when horizontal movement, compared with prior art, the device can let the inner core in the rotation state in the process of withdrawing, reduces the adhesion of injection plastics and guarantees the withdrawal speed of inner core.

Description

Technical Field

[0001] This utility model relates to the field of core-pulling mold technology, specifically a built-in metal injection molding core-pulling mold. Background Technology

[0002] In the field of injection molding, core-pulling molds are key mold components for preparing workpieces with complex internal cavities or irregular shapes. Their core function is to extract the molded core from the workpiece after injection molding, thereby reserving the cavity structure required by the design inside the workpiece.

[0003] In the traditional horizontal core-pulling mode, the cylinder driving force acts directly on the inner core, forcibly detaching it from the workpiece along the axial direction. When the adhesion force exceeds the local yield strength of the workpiece material, scratches, roughening, or even local tearing are likely to occur on the inner surface of the workpiece, leading to a decrease in the product qualification rate. If the core-pulling speed is reduced to minimize damage, the molding cycle will be prolonged, production efficiency will be reduced, which contradicts the needs of large-scale industrial production. Therefore, a built-in metal injection molding core-pulling mold is needed to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a built-in metal injection molding core-pulling mold to solve the problem mentioned in the background art that the core-pulling mold mainly uses injection molding to pull out the inner core, so that a cavity is reserved in the molded workpiece. However, when using traditional core-pulling molds, a cylinder is used to directly pull out the inner core horizontally. Some of the injection plastic is easy to stick to the surface of the inner core, which makes the horizontally moving inner core easy to damage the inner cavity of the workpiece.

[0005] This utility model provides the following technical solution: a built-in metal injection molding core-pulling mold, including a mold mechanism, the mold mechanism including a lower mold, an upper mold and an inner core extending into the lower mold; It also includes a drive mechanism, which includes a support and a cylinder for driving the inner core; In addition, a fixed sleeve connected to the cylinder and a drive rod connected to the inner core, wherein the drive rod and the fixed sleeve are connected by a bearing; The drive rod has a threaded groove, and a protrusion frame connected to the support is embedded in the groove of the drive rod.

[0006] To achieve the above technical solution, a drive rod is connected to the inner core, and a protrusion bracket is positioned in the threaded groove of the drive rod. This allows the drive rod and the inner core to rotate during horizontal movement. Compared with existing technologies, this device allows the inner core to rotate during the retraction process, reducing the adhesion of the injection molding material and ensuring the retraction speed of the inner core.

[0007] As a further improvement to this utility model, the lower mold is connected to a guide rod that extends along the movement trajectory of the upper mold, and the upper mold is fitted onto the guide rod and slides.

[0008] The above technical solution improves the guidance and stability of the upper mold moving towards the lower mold.

[0009] As a further improvement to this utility model, the bottom end of the lower mold is embedded with an ejector frame for lifting and lowering operations using a hydraulic cylinder.

[0010] The above technical solution facilitates the ejection of the formed workpiece from the lower mold.

[0011] As a further improvement to this utility model, a recessed groove is provided on the inner surface of the lower mold corresponding to the inner core for the inner core to be recessed.

[0012] The above technical solution improves the fit between the inner core end and the lower mold.

[0013] As a further improvement to this utility model, the inner core and the drive rod are an integral component.

[0014] The above technical solution improves the strength between the drive rod and the inner core.

[0015] As a further improvement to this utility model, the bracket of the bump frame is provided with a notch for the complete removal of the drive rod.

[0016] The above technical solution facilitates the removal of the drive rod and inner core as a whole from the bracket of the protrusion frame.

[0017] As a further improvement to this utility model, the fixing sleeve is slidably fitted onto the end of the cylinder's extension rod and is tightened and fixed with bolts.

[0018] The above technical solution facilitates the removal of the retaining sleeve from the end of the cylinder's extension rod.

[0019] As a further improvement to this utility model, the length of the drive rod is greater than the length of the inner core.

[0020] The above technical solution ensures the horizontal movement of the inner core.

[0021] The technical effects and advantages of this utility model are as follows: 1. This utility model uses a drive rod connected to the inner core, with a protrusion bracket positioned in the threaded groove of the drive rod, so that the drive rod and the inner core will rotate when moving horizontally.

[0022] 2. Compared with the prior art, this device allows the inner core to be in a rotating state during the ejection process, reducing the adhesion of the injection molding material and ensuring the ejection speed of the inner core. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a top-view perspective view of the overall structure of this utility model in its extended state.

[0025] Figure 2 This is a top-view perspective view of the overall structure of this utility model in the extracted state.

[0026] Figure 3 This is a top-view perspective view of the cut section of the lower mold structure of this utility model.

[0027] Figure 4 This is a top-view perspective view of the exploded state of the drive mechanism structure of this utility model.

[0028] The names represented by the part numbers in the above diagram are as follows: 100. Mold mechanism; 110. Lower mold; 111. Upper mold; 112. Inner core; 113. Guide rod; 114. Recessed groove; 115. Ejector frame; 200. Drive mechanism; 210. Support; 211. Cylinder; 212. Drive rod; 213. Protrusion frame; 214. Fixing sleeve; Detailed Implementation The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] Example: Referring to the accompanying drawings, this utility model provides a built-in metal injection molding core-pulling mold, including a mold mechanism 100. The mold mechanism 100 includes a lower mold 110, an upper mold 111, and an inner core 112 extending into the lower mold 110. A guide rod 113 extending along the movement trajectory of the upper mold 111 is connected to the lower mold 110, and the upper mold 111 is fitted onto the guide rod 113 and slides. An ejector frame 115 for lifting and lowering operation by a hydraulic cylinder is embedded at the bottom end of the lower mold 110. A recessed groove 114 is provided on the inner surface of the lower mold 110 corresponding to the inner core 112 for the inner core 112 to be recessed. It also includes a drive mechanism 200, which includes a support 210 and a cylinder 211 that drives the inner core 112. In addition, a fixed sleeve 214 connected to the cylinder 211 and a drive rod 212 connected to the inner core 112, wherein the drive rod 212 and the fixed sleeve 214 are connected by bearings. The drive rod 212 has a threaded groove, and a protrusion bracket 213 connected to the support 210 is embedded in the groove of the drive rod 212. The inner core 112 and the drive rod 212 are integral components. The bracket of the protrusion bracket 213 has a notch for completely removing the drive rod 212. The fixing sleeve 214 is slidably fitted onto the end of the extension rod of the cylinder 211 and is tightened and fixed with bolts. The length of the drive rod 212 is greater than the length of the inner core 112.

[0030] Before injection molding, the end of the inner core 112 extends into the recess 114, forming a partial blockage in the lower mold 110. Then the upper mold 111 and the lower mold 110 are fitted together, and the injection molding material is poured into the cavity formed by the lower mold 110 and the upper mold 111. After cooling, cylinder 211 is restarted, causing the extension rod of cylinder 211 to drive the drive rod 212 and the inner core 112 to move towards the outside of the lower mold 110. At the same time, during the horizontal movement of the drive rod 212, the threaded groove of the drive rod 212 continuously passes the protrusion of the protrusion of the protrusion bracket 213, thereby causing the drive rod 212 to drive the inner core 112 to rotate, so that the inner core 112 rotates and exits from the lower mold 110.

[0031] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A built-in metal injection molding core-pulling mold, comprising a mold mechanism (100), the mold mechanism (100) comprising a lower mold (110), an upper mold (111), and an inner core (112) extending into the lower mold (110), characterized in that: It also includes a drive mechanism (200), which includes a support (210) and a cylinder (211) for driving the inner core (112). In addition, a fixed sleeve (214) connected to the cylinder (211) and a drive rod (212) connected to the inner core (112) are provided, and the drive rod (212) and the fixed sleeve (214) are connected by bearings. The drive rod (212) has a threaded groove, and a protrusion bracket (213) connected to the support (210) is embedded in the groove of the drive rod (212).

2. The built-in metal injection molding core-pulling mold according to claim 1, characterized in that: The lower mold (110) is connected to a guide rod (113) that extends along the movement trajectory of the upper mold (111), and the upper mold (111) slides on the guide rod (113).

3. The built-in metal injection molding core-pulling mold according to claim 2, characterized in that: The bottom end of the lower mold (110) is embedded with an ejector frame (115) for lifting and lowering operations by a hydraulic cylinder.

4. The built-in metal injection molding core-pulling mold according to claim 3, characterized in that: A recessed groove (114) is provided on the inner surface of the lower mold (110) corresponding to the inner core (112) for the inner core (112) to be recessed.

5. The built-in metal injection molding core-pulling mold according to claim 1, characterized in that: The inner core (112) and the drive rod (212) are an integral component.

6. The built-in metal injection molding core-pulling mold according to claim 5, characterized in that: The bracket of the bump holder (213) is provided with a notch for the complete removal of the drive rod (212).

7. A built-in metal injection molding core-pulling mold according to claim 6, characterized in that: The fixing sleeve (214) is slidably fitted onto the end of the extension rod of the cylinder (211) and is tightened and fixed with bolts.

8. The built-in metal injection molding core-pulling mold according to claim 1, characterized in that: The length of the drive rod (212) is greater than the length of the inner core (112).

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