Die for front shell of air cylinder

Abstract

The utility model provides an air cylinder front shell die which is used for machining and forming an air cylinder front cover and comprises a movable die and a fixed die, a core rod is arranged at the position, corresponding to an air channel, in a cavity, a second push rod mechanism is arranged on the movable die, and the core rod is arranged at the output end of the second push rod mechanism and driven by the second push rod mechanism to do telescopic motion. And a through hole for the core rod to pass through is formed in the mold core. The core rod and the second push-pull mechanism used for pushing in and pulling out the core rod are designed in the die, and in the cavity formed by closing the movable die and the fixed die, the core rod is used for shaping the air channel, so that integral shaping of the front shell of the air cylinder can be completed in one-time die casting, additional processing of the air channel is not needed, the production process is effectively simplified, and the production efficiency is improved. The shrinkage cavity phenomenon is reduced, and the production quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold manufacturing, particularly cylinder mold technology, and especially to a cylinder front shell mold. Background Technology

[0002] The cylinder front housing is an important part of the cylinder assembly, serving functions such as protecting internal components and ensuring sealing. Cylinder front housings are typically cast from corrosion-resistant, high-strength materials such as cast iron, cast steel, aluminum alloy, or stainless steel, and must ensure good durability and reliability during use.

[0003] In the design of the cylinder front housing, it is usually designed as a cylinder or similar shape to accommodate the piston movement of the cylinder. At the same time, the cylinder front housing also needs to be designed with an air passage for the input or output of pressurized gas on one side of its end.

[0004] In the die-casting manufacturing process of cylinder front housings, the die-casting mold is designed according to the cylinder's external shape requirements. Currently, in production, the outer surface of the cylinder front housing is typically formed using a moving mold and a fixed mold, while the inner surface is formed by setting a core within the mold cavity. Cylinder front housings cast using this mold structure require two steps in production: first, the die-casting mold forms the shell with the piston's moving chamber; then, the shell is machined to create the air passageway. This method of manufacturing cylinder front housings involves two processes: die-casting and channel forming, making the production process relatively complex.

[0005] At the same time, it is necessary to design the housing position of the air passage. In order to ensure the safety and reliability of the air passage, the housing needs to have a certain wall thickness. The wall thickness at this position will be different from the thickness of the housing at the core position. This thickness difference may lead to uneven temperature during the die casting process, resulting in shrinkage cavities in some positions. This may affect the overall die casting quality of the cylinder front housing and lead to an increase in the product defect rate. Utility Model Content

[0006] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a cylinder front shell mold, which can be formed in one step in the die casting process, and the air passage can be formed without additional processing. This simplifies the processing technology, stabilizes the die casting quality, and reduces the product defect rate.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a cylinder front shell mold for processing and forming a cylinder front cover, wherein the cylinder front cover has a main chamber for piston movement, and an air passage communicating with the main chamber is also provided on the side wall of the cylinder front cover. The cylinder front shell mold includes a moving mold and a fixed mold, wherein the moving mold and the fixed mold close to form a cavity and a gating system, wherein the gating system includes a main runner; a core is provided in the cavity corresponding to the position of the main chamber, and a first push rod mechanism is provided on the moving mold, wherein the core is located at the output end of the first push rod mechanism and is controlled by the first push rod mechanism. The core has a mandrel located at the corresponding air passage position within the cavity. The moving mold has a second push rod mechanism, with the mandrel positioned at the output end of the second push rod mechanism and driven by the second push rod mechanism to extend and retract. The core has a through hole through which the mandrel passes. The gating system includes a main channel, which branches along the length of the main cavity of the cylinder front cover to form several feed channels. The first push rod mechanism is located at one end of the cylinder front cover axis, and the second push rod mechanism and the feed channels are respectively located on both sides of the main cavity of the cylinder front cover axis.

[0008] In the above solution, a mandrel for forming the airflow channel is integrated into the die-casting mold, which can directly form the cylinder front cover in one die-casting process without the need for secondary processing to form the channel required for the airflow channel. This can effectively simplify the production process and reduce the shrinkage phenomenon caused by uneven heating due to excessive thickness at the channel position, further improving the die-casting quality of the cylinder front cover.

[0009] Furthermore, the intake / exhaust passage is usually set at a right angle to the cylinder piston chamber. Correspondingly, the air passage in the cylinder front housing is also set at 90° to the main chamber. Therefore, the corresponding core and mandrel are also set at a 90° angle. The extension and retraction directions of the output ends of the first push rod mechanism and the second push rod mechanism are also at a 90° angle.

[0010] Furthermore, the main flow channel is divided at intervals along the length of the main chamber axis of the cylinder front cover to form several feed channels. Through the feed channels set in the axial direction, materials can be fed at intervals from the circumferential outer wall along the axial direction of the cylinder front shell, which is conducive to the overall uniform forming of the shell.

[0011] Furthermore, the cavity corresponds to the two sides of the main chamber of the cylinder front cover along the axial length direction. On the side opposite to the feed channel, there are several overflow chambers. The overflow chambers are distributed on both sides of the second push rod mechanism. The position of the overflow chambers is further rationally arranged so that they are set to correspond to the feed channel. This can not only ensure the overflow effect, but also avoid the second push rod mechanism, providing space for inserting the mandrel from the side.

[0012] Preferably, in order to facilitate timely gas discharge, the overflow cavity is externally connected to an exhaust groove.

[0013] The beneficial effects of this utility model are that the cylinder front housing mold provided by this utility model, in order to meet the design requirements of the air passage, separately designs a mandrel and a second push-pull mechanism for pushing and pulling the mandrel in and out of the mold. In the cavity formed by the closing of the moving mold and the fixed mold, the mandrel shapes the air passage, thereby completing the overall shaping of the cylinder front housing in one die casting, without the need for additional processing of the air passage, effectively simplifying the production process. At the same time, it also avoids the excessive thickness difference between the corresponding position of the housing and the position with the mandrel when the air passage is not processed, further reducing the occurrence of shrinkage cavities, thereby improving the production quality of the cylinder front cover. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a perspective view of an embodiment of the present invention after removing the mold base and the mold.

[0017] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a top view of an embodiment of the present invention after removing the mold base and the mold.

[0019] Figure 5 yes Figure 4 A cross-sectional view of BB.

[0020] In the figure: 1. Fixed mold; 2. Fixed mold base; 3. Moving mold; 4. Moving mold base; 5. Second push rod mechanism; 6. First push rod mechanism; 7. Core rod; 8. Overflow cavity; 9. Venting groove; 10. Core; 11. Feed channel; 12. Outer channel. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0022] like Figures 1 to 5The cylinder front cover mold shown is the preferred embodiment of this utility model. This cylinder front cover mold is used to process and form a cylinder front cover. The cylinder front cover processed in this embodiment has a main chamber for piston movement inside, and an air passage communicating with the main chamber is also provided on the side wall of the cylinder front cover. The air passage is connected to the main chamber and is set at a right angle.

[0023] Based on this, the cylinder front housing mold provided in this embodiment includes a moving mold base 4 and a fixed mold 1. For example... Figure 1 As shown, the fixed mold 1 is mounted on the fixed mold base 2, and the moving mold base 4 is mounted on the moving mold base 4. The moving mold base 4 and the fixed mold 1 are driven and engaged by an external power mechanism. The power mechanism can be, but is not limited to, cylinders, electric push rods, etc. The external power mechanism drives the moving mold base 4 and the fixed mold 1 to close and form a cavity and gating system.

[0024] The gating system includes an outer runner 12 and a main runner. The outer runner 12 connects to an externally pressurized casting liquid, such as molten metal. The main runner is connected to the outer runner 12 and flows into the mold cavity to supply material for the forming of the cylinder front shell. In this embodiment, the main runner branches along the axial length of the main chamber of the cylinder front cover to form several feed channels 11. Through the feed channels 11 arranged along the axial direction, material can be fed at intervals from the circumferential outer wall along the axial direction of the cylinder front shell, which is beneficial to the overall uniform forming of the shell.

[0025] like Figure 2 and Figure 3 As shown, a core 10 is provided at the position corresponding to the main cavity within the mold cavity. A first push rod mechanism 6 is provided on the moving mold base 4. The core 10 is located at the output end of the first push rod mechanism 6 and is driven to extend and retract by the first push rod mechanism 6. A mandrel 7 is provided at the position corresponding to the air passage within the mold cavity. A second push rod mechanism 5 is provided on the moving mold base 4. The mandrel 7 is located at the output end of the second push rod mechanism 5 and is driven to extend and retract by the second push rod mechanism 5. A through hole is provided on the core 10 for the mandrel 7 to pass through. The mold cavity is used to form the shape of the cylinder front cover. The mold cavity and the core 10, when combined, form the main cavity of the cylinder front cover. The mold cavity and the mandrel 7, when combined, form the airflow passage of the cylinder front cover.

[0026] like Figure 4 As shown, in this embodiment, to ensure good fit between the various workpiece parts, the first push rod mechanism 6 is positioned at one end of the cylinder front cover axis, while the second push rod mechanism 5 and the feed channel 11 are respectively positioned on both sides of the cylinder front cover main chamber axis. The core 10 and the mandrel 7 are positioned at a 90° angle to each other, based on the angle between the air passage in the cylinder front housing and the main chamber. The extension and retraction directions of the output ends of the first push rod mechanism 6 and the second push rod mechanism 5 also form a 90° angle. The first push rod mechanism 6 and the second push rod mechanism 5 can be, but are not limited to, electric push rods, cylinders, etc.

[0027] The cavity corresponds to the two sides of the main chamber of the cylinder front cover along the axial length direction. On the side opposite to the feed channel 11, there are several overflow chambers 8. The overflow chambers 8 are located on both sides of the second push rod mechanism 5. The overflow chambers 8 are connected to exhaust grooves 9 for timely exhaust. The position and layout of the overflow chambers 8 correspond to the feed channel 11, which can ensure the overflow effect and avoid the second push rod mechanism 5, providing space for the insertion of the mandrel 7 from the side.

[0028] In response to the design requirements of the air passage in the cylinder front cover, this embodiment incorporates a mandrel 7 within the cavity and a second push-pull mechanism for pushing and pulling the mandrel 7 in and out on the moving mold base 4. Within the cavity formed by the closing of the moving mold base 4 and the fixed mold 1, the mandrel 7 shapes the air passage.

[0029] This design of the cylinder front cover mold allows for the shaping of the main chamber and air passage of the cylinder front cover in a single die-casting process, eliminating the need for additional machining of the air passage and effectively simplifying the production process. It also avoids excessive thickness differences at corresponding locations on the housing when the air passage is not machined. Preventing uneven heating due to these thickness differences further reduces shrinkage cavities, effectively improving the production quality of the cylinder front cover and increasing the yield rate of die casting.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cylinder head front shell mold for machining a cylinder head front cover, said cylinder head front cover having a main cavity for movement of a piston therein, and a gas passage channel through the main cavity formed in a side wall of the cylinder head front cover, characterized in that: The utility model relates to a movable die seat (4) and fixed die (1) are closed to form a cavity and a runner system, the runner system includes a main runner, the cavity is provided with a core (10) at the position corresponding to the main cavity, the movable die seat (4) has a first push rod mechanism (6), the core (10) is arranged at the output end of the first push rod mechanism (6) and is driven to retract and extend by the first push rod mechanism (6), the cavity is provided with a core rod (7) at the position corresponding to the air path, the movable die seat (4) has a second push rod mechanism (5), the core rod (7) is arranged at the output end of the second push rod mechanism (5) and is driven to retract and extend by the second push rod mechanism (5), the core (10) is provided with a through hole for the core rod (7) to pass through, ​ the first push rod mechanism (6) is arranged at one end of the cylinder front cover axis, and the second push rod mechanism (5) and the feed runner (11) are arranged on the two sides of the cylinder front cover main chamber axis direction respectively. The core (10) and the core rod (7) are arranged at 90 degrees, and the first push rod mechanism (6) and the second push rod mechanism (5) are also arranged at 90 degrees.

2. The cylinder block mold of claim 1, wherein: The main runner is divided into several feed runners (11) along the length direction of the cylinder front cover main chamber axis.

3. The cylinder block mold of claim 1, wherein: The cavity is provided with several overflow cavities (8) on the side opposite to the feed runner (11) on both sides of the length direction of the cylinder front cover main chamber axis.

4. The cylinder block mold of claim 3, wherein: The overflow cavity (8) is provided with an exhaust groove (9).

5. The cylinder block mold of claim 4, wherein: ​

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