A mold positioning device with venting function

Abstract

This utility model belongs to the field of aluminum alloy wheel hub molds, specifically relating to a mold positioning device with venting function, including a positioning sleeve, a positioning pin, a top mold, and a bottom mold; the upper part of the outer wall of the positioning sleeve is connected to the top mold; the lower part of the positioning pin is fixed to the bottom mold, and the upper part of the positioning pin is connected to the top mold; the upper part of the positioning pin is provided with a guide section of the optical axis, and the bottom of the top mold is provided with an internal thread structure; a gap is formed between the guide section of the optical axis and the internal thread structure. The positioning sleeve is installed on the top mold through its movable replaceable structure, and can be adapted to different mold thicknesses by replacing different specifications of the female sleeve; the internal thread gap can form an effective venting channel, significantly improving the venting efficiency at the mold window position, thereby reducing the incomplete casting defects at the casting window position. This utility model integrates three major functions: quick mold change, efficient venting, and high-precision positioning, effectively solving problems such as multi-specification mold adaptation, poor venting in deep cavities, and insufficient positioning accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum alloy wheel hub molds, and specifically relates to a mold positioning device with venting function. Background Technology

[0002] In the casting process of aluminum alloy wheels, the mold typically consists of a top mold, a bottom mold, and side molds. In existing technologies, the fit between the side molds and the top / bottom molds usually presents the following problems: Insufficient positioning accuracy: Traditional guiding and positioning mechanisms (such as guide pillars and guide sleeves) may have fitting clearances, or their positioning accuracy may decrease due to wear and tear over long-term use. During mold closing, slight misalignment or offset may occur between the side mold and the top / bottom mold surfaces. This misalignment can interfere with and scratch the already formed aluminum alloy wheel blank at the moment of mold closing, especially in thin-walled areas such as window edges, causing scratches on the wheel surface, leading to product scrap and severely impacting the yield rate.

[0003] Poor venting: The complex structure of the wheel hub window area makes it a "dead zone" where air and reactive gases easily accumulate in the mold cavity. Although existing molds may have venting grooves or venting plugs, these venting structures are often independent of the positioning system. Blockage of the venting grooves or inaccurate installation of the venting plugs can prevent gases from escaping in a timely manner. When these gases are drawn into the high-temperature molten metal, they can create casting defects such as porosity and shrinkage cavities inside or on the surface of the wheel hub window, affecting the wheel's mechanical properties and aesthetics. Utility Model Content

[0004] This invention proposes a mold positioning device with venting function to solve the problems of difficult precise positioning of side molds, top molds and bottom molds and inefficient venting in window areas in the prior art.

[0005] To achieve the above objectives, the present invention proposes the following technical solution: A mold positioning device with venting function includes a positioning sleeve, a positioning pin, a top mold, and a bottom mold; The upper part of the outer wall of the positioning sleeve is connected to the top mold; the lower part of the positioning post is fixed on the bottom mold, and the upper part of the positioning post is connected to the top mold; the upper part of the positioning post is provided with an optical axis guide section, and the bottom of the top mold is provided with an internal thread structure; a gap is formed between the optical axis guide section and the internal thread structure.

[0006] Preferably, the positioning sleeve is connected to the top mold via an external thread on the upper part of its outer wall.

[0007] Preferably, the positioning post is connected to the bottom mold via an external thread on the lower part of the outer wall.

[0008] Preferably, the positioning column is connected to the bottom mold via a mounting flange on the lower part of the outer wall.

[0009] Preferably, the top end of the optical axis guide section is provided with a guide chamfer.

[0010] Preferably, the upper opening of the positioning sleeve is also provided with a sealing groove.

[0011] Preferably, the positioning column is fixedly installed on the bottom mold by positioning bolts.

[0012] The advantages of this utility model are: This invention proposes a mold positioning device with venting function. The positioning sleeve is installed on the top mold via a movable, replaceable structure on its upper part, and can be adapted to different mold thicknesses by replacing the female sleeve of different specifications. The optical axis guide section and internal thread structure inside the device can form an effective venting channel, significantly improving the venting efficiency at the mold window position, thereby reducing incomplete filling defects at the casting window area. The positioning pin is installed on the bottom mold, and its guide section is designed with an extended length, which can significantly increase the effective positioning contact area when it cooperates with the positioning sleeve, improving the guiding accuracy and stability of mold closing. Attached Figure Description

[0013] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings: Figure 1 A schematic diagram of a mold positioning device with venting function; Figure 2 A schematic diagram of a mold positioning device with venting function applied to a wheel hub mold; Figure 3 This is a schematic diagram of a mold positioning device with venting function, viewed from the back cavity of the mold. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0015] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention. Example

[0016] Please see Figure 1As shown, this utility model provides a mold positioning device with venting function, including a positioning sleeve 1, a positioning post 2, a positioning bolt 3, a top mold 4, and a bottom mold 5.

[0017] The positioning sleeve 1 and the positioning pin 2 cooperate with each other; the positioning sleeve 1 is a nut structure, and its upper outer wall is provided with a first mounting part for connecting with the top mold 4, which cooperates with the internal thread structure inside the top mold 4.

[0018] The positioning pin 2 is fixedly installed on the bottom mold 5. Its lower outer wall has a second mounting part for connecting with the bottom mold 5, and its upper part is a guide section with an optical axis that matches the internal thread structure of the top mold 4. The length of the guide section with the optical axis is greater than the guide section length of the standard positioning pin, so as to form an increased effective positioning contact area with the internal thread structure of the positioning sleeve 1 when the mold is closed. A schematic diagram of this utility model applied to a wheel hub mold is shown below. Figure 2 As shown.

[0019] The positioning sleeve 1 is a replaceable, movable structure that is detachably installed in the top mold 4 via the first mounting part. Different thicknesses of the top mold 4 can be adapted by replacing the positioning sleeve 1 with different axial lengths.

[0020] The thread gap of the internal thread structure forms an exhaust channel. During the mold closing process, the gas in the mold cavity can be discharged sequentially through the fitting gap between the optical axis guide section and the internal thread structure, and the exhaust channel.

[0021] The upper opening of the positioning sleeve 1 is also provided with a sealing groove to prevent overflow material from entering the thread gap.

[0022] The top of the optical axis guide section is provided with a guide chamfer.

[0023] The positioning column 2 is fixedly installed on the bottom mold 5 by positioning bolts 3, such as Figure 3 As shown.

[0024] In one specific embodiment, the first mounting part is an external thread located on the upper part of the outer wall of the positioning sleeve 1.

[0025] In one specific embodiment, the second mounting part is a mounting flange or external thread located on the lower part of the outer wall of the positioning column 2.

[0026] This invention boasts extremely high positioning accuracy, eliminating scratches: Utilizing the characteristics of bolt fastening, it achieves micron-level precise positioning at the final moment of mold closing, ensuring complete alignment of the cavity contours of the side mold and the top / bottom mold. This fundamentally eliminates mold closing interference, greatly reduces the risk of scratches at the aluminum alloy wheel hub window area, and significantly improves product surface quality and yield.

[0027] This invention offers highly efficient and reliable venting: by deeply integrating the venting function with the positioning structure, it creates the shortest and most effective venting path directly originating from the dangerous area (window) of the mold cavity. The gas exhaust resistance is low, and the efficiency is high, significantly reducing casting defects such as porosity and shrinkage within and on the surface of the wheel hub window, thereby improving the mechanical properties and overall quality of the wheel hub.

[0028] This utility model has a compact structure and integrated functions: it integrates positioning and venting functions into a single structure, which simplifies mold design, saves mold space (especially for compact multi-spoke wheel hub molds), and avoids interference problems that may occur when multiple individual parts (such as guide pillars and vent plugs) are arranged.

[0029] This invention proposes a mold positioning device with venting function. The positioning sleeve 1 is installed on the top mold 4 via a movable and replaceable structure on its upper part, and can be adapted to different mold thicknesses by replacing different specifications of the female sleeve. Its internal threaded structure forms an effective venting channel, significantly improving the venting efficiency at the mold window position, thereby reducing incomplete casting defects at the casting window area. The positioning pin 2 is installed on the bottom mold 5, and its guide section is designed to be extended, significantly increasing the effective positioning contact area when it cooperates with the positioning sleeve, improving the guiding accuracy and stability of mold closing. This invention integrates three major functions: rapid mold change, efficient venting, and high-precision positioning, effectively solving problems such as multi-specification mold adaptation, poor venting in deep cavities, and insufficient positioning accuracy.

[0030] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A mold positioning device with venting function, characterized in that, Includes positioning sleeve, positioning pin, top mold, and bottom mold; The upper part of the outer wall of the positioning sleeve is connected to the top mold; the lower part of the positioning post is fixed on the bottom mold, and the upper part of the positioning post is connected to the top mold; the upper part of the positioning post is provided with an optical axis guide section, and the bottom of the top mold is provided with an internal thread structure; a gap is formed between the optical axis guide section and the internal thread structure.

2. The mold positioning device with venting function as described in claim 1, characterized in that, The positioning sleeve is connected to the top mold via external threads on the upper part of its outer wall.

3. A mold positioning device with venting function as described in claim 1, characterized in that, The positioning post is connected to the bottom mold via an external thread on the lower part of the outer wall.

4. A mold positioning device with venting function as described in claim 1, characterized in that, The positioning column is connected to the bottom mold via a mounting flange on the lower part of the outer wall.

5. A mold positioning device with venting function as described in claim 1, characterized in that, The top of the optical axis guide section is provided with a guide chamfer.

6. A mold positioning device with venting function as described in claim 1, characterized in that, The upper opening of the positioning sleeve is also provided with a sealing groove.

7. A mold positioning device with venting function as described in claim 1, characterized in that, The positioning column is fixedly installed on the bottom mold by positioning bolts.

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