Two-way positioning and locking mechanism of casting mold

Abstract

The utility model discloses a bidirectional positioning locking mechanism of casting mould, including upper mould, the lower mould is equipped with the lower mould right below the upper mould, the outside of lower mould and upper mould all realizes bidirectional positioning and locking through positioning assembly, the positioning assembly includes rectangular locating block, convex block formula locking structure, locating seat and trapezoidal locating block, two rectangular locating blocks with trapezoidal locating block are fixedly connected in the both ends outer wall of upper mould and lower mould respectively, the utility model discloses bidirectional positioning locking mechanism of casting mould, realizes vertical and horizontal bidirectional prepositioning through "trapezoidal locating block + rectangular locating block " with locating seat groove body cooperation, ensures that the die guiding accuracy reaches less than or equal to 0.05mm, effectively avoids casting defects, and simultaneously utilizes convex block formula locking structure and spring assembly cooperation and converts vertical die force into bidirectional locking force, resists metal liquid expansion type force, and collocates round plate manual debugging function, and gives consideration to precision guarantee, stable production and convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, and in particular to a bidirectional positioning and locking mechanism for casting molds. Background Technology

[0002] In the field of casting molds, the positioning accuracy and locking reliability during mold closing directly affect the quality of castings. Traditional casting molds often use single-direction positioning or simple locking structures, which have obvious defects: on the one hand, the mold closing process is prone to misalignment due to insufficient positioning reference and low guiding accuracy, resulting in dimensional deviations and flash in the castings; on the other hand, conventional locking mechanisms cannot provide stable bidirectional locking force in the face of the expansion force during molten metal filling, and the mold is prone to relative displacement, reducing production stability and casting yield.

[0003] Therefore, we propose a two-way positioning and locking mechanism for casting molds. Utility Model Content

[0004] The main purpose of this utility model is to provide a bidirectional positioning and locking mechanism for casting molds. In order to prevent quality defects such as casting dimensional deviation, flash, and deformation caused by mold misalignment, insufficient positioning accuracy, and unstable locking force, as well as production interruptions and equipment wear caused by relative mold displacement, the mechanism can improve the forming accuracy and surface quality of castings, enhance the stability and reliability of the casting process, improve production efficiency and yield, and reduce production costs. It can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A bidirectional positioning and locking mechanism for a casting mold includes an upper mold and a lower mold located directly below the upper mold. Both the lower mold and the upper mold are bidirectionally positioned and locked through positioning components. The positioning components include a rectangular positioning block, a protrusion-type locking structure, a positioning seat, and a trapezoidal positioning block.

[0007] By adopting the above technical solution, before the upper mold and the lower mold are closed, the rectangular positioning blocks and trapezoidal positioning blocks at both ends need to be aligned with the positioning seat. The upper mold drives the rectangular positioning blocks to move downward, and the lower mold adjusts its position synchronously so that the trapezoidal positioning blocks and the rectangular positioning blocks form a "stepped" fitting structure, which prepares for the insertion of the first rectangular positioning groove and trapezoidal positioning groove into the positioning seat, and initially constrains the horizontal displacement of the mold.

[0008] Furthermore, the two rectangular positioning blocks and the trapezoidal positioning block are respectively fixedly connected to the outer walls of the upper mold and the lower mold at both ends, and the trapezoidal positioning block is fixedly connected to the top of the rectangular positioning block.

[0009] By adopting the above technical solution, during the pressing process of the upper mold, the trapezoidal positioning block is first inserted into the trapezoidal positioning groove of the positioning seat. The guiding effect of the trapezoidal inclined surface is used to guide the upper mold to be accurately centered. Then, the rectangular positioning block is inserted into the first rectangular positioning groove. Through the insertion of the "trapezoidal + rectangular" double groove, the displacement is restricted from the vertical direction of mold closing, and at the same time, the horizontal direction of mold width / length is further constrained to achieve bidirectional pre-positioning.

[0010] Furthermore, the inner side of the positioning seat is vertically provided with a first rectangular positioning groove and a trapezoidal positioning groove for the rectangular positioning block and the trapezoidal positioning block to be inserted, and the trapezoidal positioning groove is located directly above the first rectangular positioning groove.

[0011] By adopting the above technical solution, the groove walls of the first rectangular positioning groove and the trapezoidal positioning groove form a rigid limit for the inserted rectangular positioning block and trapezoidal positioning block. The gap between the rectangular / trapezoidal cross section of the groove and the shape of the positioning block is ≤0.05 mm, which not only ensures the guiding accuracy when the mold is closed, but also resists the impact load of mold closing through the contact of the groove wall, prevents the mold from shifting, and prepares the structure for subsequent protrusion locking.

[0012] Furthermore, a second rectangular positioning groove is laterally formed inside the positioning seat, and a push plate is slidably connected to the inside of the second rectangular positioning groove. A push rod is laterally fixedly connected to the side of the push plate away from the first rectangular positioning groove.

[0013] By adopting the above technical solution, when the rectangular positioning block is vertically inserted into the first rectangular positioning groove, the inclined surface of the protrusion will squeeze the push plate. The push plate is pushed by the inclined surface and slides to the right along the second rectangular positioning groove away from the mold in the direction diagram. Simultaneously, it drives the push rod to move to the right. This process, through "positioning block insertion → inclined surface squeezing → push plate sliding → push rod linkage", converts the vertical force of mold closing into the horizontal displacement of the push plate and push rod, which prepares for subsequent spring energy storage and locking triggering.

[0014] Furthermore, a first spring is sleeved on the outside of the push rod, the first spring is connected between the push plate and the inner wall of the second rectangular positioning groove, and one end of the push rod push plate extends through the positioning seat to the outer wall and is fixedly connected to a circular plate.

[0015] By adopting the above technical solution, during the rightward movement of the push rod, the first spring is compressed by the push plate and the inner wall of the right side of the second rectangular positioning groove. The first spring generates an elastic restoring force under compression. This force acts in the opposite direction to the protrusion through the push plate, forming a pre-tightening force in the vertical direction of mold closing, preventing the mold from being lifted upward when impacted by molten metal. At the same time, the circular plate at the end of the push rod can be used as a manual adjustment component. If forced unlocking is required, the displacement of the push plate can be controlled by pressing the circular plate to assist in the opening and closing of the mold.

[0016] Furthermore, the protrusion-type locking structure includes a second spring that is laterally connected in the inner cavity of the rectangular positioning block, and a protrusion is fixedly connected to one end of the second spring near the second rectangular positioning groove.

[0017] By adopting the above technical solution, when the rectangular positioning block is initially inserted into the first rectangular positioning groove, the protrusion is squeezed by the left side wall of the second rectangular positioning groove, compressing the second spring and retracting into the inner cavity; when the rectangular positioning block is fully in place, the protrusion aligns with the cavity in the slot diagram of the second rectangular positioning groove that matches the protrusion, the second spring elastically rebounds, pushing the protrusion into the slot. At this time, the protrusion restricts the displacement of the rectangular positioning block in the horizontal direction of the mold, and together with the vertical preload of the first spring, achieves bidirectional locking to resist the expansion force of the molten metal during casting.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The bidirectional positioning and locking mechanism of the casting mold of this utility model uses a groove structure of "trapezoidal positioning block + rectangular positioning block" to cooperate with the positioning seat. When the mold is closed, the trapezoidal inclined surface guides the precise centering first, and then the rectangular groove provides secondary constraint, so as to realize the pre-positioning of the mold in both vertical and horizontal directions. The gap between the groove and the positioning block is ≤0.05mm, which greatly improves the mold closing guidance accuracy, effectively avoids defects such as casting size deviation and flash caused by mold misalignment, and ensures the casting forming quality.

[0020] (2) The bidirectional positioning and locking mechanism of the casting mold of this utility model utilizes the convex locking structure and spring assembly to work together to convert the vertical mold closing force into horizontal displacement to realize the energy storage of the spring when the mold is closed. After the position is reached, the convex is inserted into the slot to form horizontal locking, and the spring preload provides vertical locking. The bidirectional forces work together to resist the metal liquid expansion force, prevent mold displacement, and improve the stability of the casting process. At the same time, the circular plate design supports manual adjustment and unlocking, taking into account the needs of automated production and manual maintenance, and ensuring continuous and reliable production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the bidirectional positioning and locking mechanism of the casting mold of this utility model.

[0022] Figure 2 This is a schematic diagram showing the disassembled structure of the positioning component of the bidirectional positioning and locking mechanism for the casting mold of this utility model.

[0023] Figure 3 This is a cross-sectional view of the positioning component of the bidirectional positioning and locking mechanism for the casting mold of this utility model.

[0024] In the diagram: 1. Upper mold; 2. Lower mold; 3. Rectangular positioning block; 4. First rectangular positioning groove; 5. Inner cavity; 6. Second rectangular positioning groove; 7. Protrusion-type locking structure; 8. Push plate; 9. Push rod; 10. First spring; 11. Round plate; 12. Second spring; 13. Protrusion; 14. Positioning seat; 15. Trapezoidal positioning block; 16. Trapezoidal positioning groove. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] To prevent quality defects such as casting dimensional deviations, flash, and deformation caused by mold misalignment, insufficient positioning accuracy, and unstable locking force, as well as production interruptions and equipment wear caused by relative mold displacement, thereby improving the forming accuracy and surface quality of castings, enhancing the stability and reliability of the casting process, increasing production efficiency and yield, and reducing production costs, such as... Figure 1 , Figure 2 , Figure 3 As shown, the bidirectional positioning and locking mechanism of the casting mold includes an upper mold 1, and a lower mold 2 is provided directly below the upper mold 1. The lower mold 2 and the upper mold 1 are both bidirectionally positioned and locked through positioning components. The positioning components include a rectangular positioning block 3, a protrusion locking structure 7, a positioning seat 14, and a trapezoidal positioning block 15.

[0027] When in use, before the upper mold 1 and the lower mold 2 are closed, the rectangular positioning blocks 3 and trapezoidal positioning blocks 15 at both ends need to be aligned with the positioning seat 14. The upper mold 1 drives the rectangular positioning blocks 3 to move downward, and the lower mold 2 adjusts its position synchronously so that the trapezoidal positioning blocks 15 and the rectangular positioning blocks 3 form a "stepped" fitting structure, which prepares for the insertion of the first rectangular positioning groove 4 and trapezoidal positioning groove 16 into the positioning seat 14, and initially constrains the horizontal displacement of the mold.

[0028] For example, such as Figure 2 , Figure 3 As shown, the present invention also includes two rectangular positioning blocks 3 and trapezoidal positioning blocks 15, which are respectively fixedly connected to the outer walls of the upper mold 1 and the lower mold 2 at both ends, and the trapezoidal positioning block 15 is fixedly connected to the top of the rectangular positioning block 3.

[0029] During use, when the upper mold 1 is pressed down, the trapezoidal positioning block 15 is inserted into the trapezoidal positioning groove 16 of the positioning seat 14 first. The guide effect of the trapezoidal inclined surface is used to guide the upper mold 1 to be accurately centered. Then, the rectangular positioning block 3 is inserted into the first rectangular positioning groove 4. Through the insertion of the "trapezoidal + rectangular" double groove, the displacement is restricted from the vertical direction of mold closing, and at the same time, the mold width / length direction is further constrained in the horizontal direction, so as to achieve bidirectional pre-positioning.

[0030] For example, such as Figure 2 , Figure 3 As shown, the present invention also includes a first rectangular positioning groove 4 and a trapezoidal positioning groove 16 vertically formed on the inner side of the positioning base 14 for inserting the rectangular positioning block 3 and the trapezoidal positioning block 15, respectively, with the trapezoidal positioning groove 16 located directly above the first rectangular positioning groove 4.

[0031] In use, the groove walls of the first rectangular positioning groove 4 and the trapezoidal positioning groove 16 form a rigid limit for the inserted rectangular positioning block 3 and trapezoidal positioning block 15. The rectangular / trapezoidal cross section of the groove body matches the shape of the positioning block with a gap of ≤0.05mm, which not only ensures the guiding accuracy when the mold is closed, but also resists the impact load of mold closing through the contact of the groove wall, prevents the mold from shifting, and prepares the structure for subsequent protrusion locking.

[0032] For example, such as Figure 3 As shown, the present invention also includes a second rectangular positioning groove 6 horizontally opened inside the positioning seat 14, a push plate 8 slidably connected to the inside of the second rectangular positioning groove 6, and a push rod 9 horizontally fixedly connected to the side of the push plate 8 away from the first rectangular positioning groove 4.

[0033] During use, when the rectangular positioning block 3 is vertically inserted into the first rectangular positioning groove 4, the inclined surface of the protrusion 13 will press against the push plate 8. The push plate 8 is pushed by the inclined surface and slides along the second rectangular positioning groove 6 to the right in the direction away from the mold. Simultaneously, it drives the push rod 9 to move to the right. This process, through "positioning block insertion → inclined surface pressing → push plate sliding → push rod linkage", converts the vertical force of mold closing into the horizontal displacement of the push plate and push rod, preparing for subsequent spring energy storage and locking triggering.

[0034] For example, such as Figure 2 , Figure 3 As shown, the present invention also includes a first spring 10 sleeved on the outside of the push rod 9. The first spring 10 is connected between the push plate 8 and the inner wall of the second rectangular positioning groove 6. One end of the push rod 9 push plate 8 extends through the positioning seat 14 to the outer wall and is fixedly connected to a circular plate 11.

[0035] During use, as the push rod 9 moves to the right, the first spring 10 is compressed by the push plate 8 and the inner wall of the right side of the second rectangular positioning groove 6. The first spring 10 generates an elastic restoring force under compression. This force acts in the opposite direction to the protrusion 13 through the push plate 8, forming a pre-tightening force in the direction of mold closing perpendicular to the mold, preventing the mold from being lifted upward when impacted by molten metal. At the same time, the circular plate 11 at the end of the push rod 9 can be used as a manual adjustment component. If forced unlocking is required, the displacement of the push plate 8 can be controlled by pressing the circular plate 11 to assist in the opening and closing of the mold.

[0036] For example, such as Figure 2 , Figure 3 As shown, the present invention also includes a second spring 12 laterally connected in the inner cavity 5 of the rectangular positioning block 3, wherein a protrusion 13 is fixedly connected to one end of the second spring 12 near the second rectangular positioning groove 6.

[0037] In use, when the rectangular positioning block 3 is initially inserted into the first rectangular positioning groove 4, the protrusion 13 is squeezed by the left side wall of the second rectangular positioning groove 6, compressing the second spring 12 and retracting into the inner cavity 5. When the rectangular positioning block 3 is fully in place, the protrusion 13 aligns with the cavity in the slot diagram of the second rectangular positioning groove 6 that is compatible with the protrusion. The second spring 12 rebounds elastically, pushing the protrusion 13 into the slot. At this time, the protrusion 13 restricts the displacement of the rectangular positioning block 3 in the horizontal direction of the mold. Combined with the vertical preload of the first spring 10, it achieves bidirectional locking and resists the expansion force of the molten metal during casting.

[0038] It should be noted that this utility model is a bidirectional positioning and locking mechanism for casting molds. Before mold closing, the rectangular positioning blocks 3 and trapezoidal positioning blocks 15 at both ends of the upper and lower molds are aligned with the positioning seat 14. The upper mold 1 drives the rectangular positioning blocks 3 to move downwards, and the lower mold 2 adjusts synchronously to form a "stepped" fitting structure, which initially constrains horizontal displacement. When the mold closes, the trapezoidal positioning block 15 is first inserted into the trapezoidal positioning groove 16 of the positioning seat 14, and the upper mold 1 is accurately centered by means of the inclined guide. Then, the rectangular positioning block 3 is inserted into the first rectangular positioning groove 4. Through the "trapezoidal + rectangular" double groove insertion, the vertical and horizontal displacement is restricted, and bidirectional pre-positioning is achieved. The groove walls of the first rectangular positioning groove 4 and the trapezoidal positioning groove 16 are aligned with the positioning blocks. Rigid limiting ensures guiding accuracy and resists impact and deviation. When the rectangular positioning block 3 is inserted, the inclined surface of the protrusion 13 presses against the push plate 8. The push plate 8 slides to the right along the second rectangular positioning groove 6 and drives the push rod 9 to move to the right, converting the vertical force of mold closing into horizontal displacement, preparing for spring energy storage and locking trigger. The push rod 9 moves to the right and compresses the first spring 10. Its elastic restoring force acts on the protrusion 13 through the push plate 8, forming a vertical pre-tightening force to prevent the mold from lifting. The circular plate 11 can be manually assisted in opening and closing. In the initial stage of the rectangular positioning block 3 insertion, the protrusion 13 is squeezed and contracted by the groove wall. After it is in place, the second spring 12 rebounds and makes the protrusion 13 lock into the slot. With the vertical pre-tightening force of the first spring 10, a two-way locking is achieved to resist the expansion force of the metal liquid.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bidirectional positioning and locking mechanism for a casting mold, comprising an upper mold (1), characterized in that, The lower mold (2) is located directly below the upper mold (1). Both the lower mold (2) and the upper mold (1) are positioned and locked in both directions by positioning components. The positioning components include a rectangular positioning block (3), a protrusion locking structure (7), a positioning seat (14), and a trapezoidal positioning block (15).

2. The bidirectional positioning and locking mechanism for casting molds according to claim 1, characterized in that: The two rectangular positioning blocks (3) and trapezoidal positioning blocks (15) are fixedly connected to the outer walls of the upper mold (1) and the lower mold (2) respectively, and the trapezoidal positioning block (15) is fixedly connected to the top of the rectangular positioning block (3).

3. The bidirectional positioning and locking mechanism for casting molds according to claim 1, characterized in that: The inner side of the positioning base (14) is provided with a first rectangular positioning groove (4) and a trapezoidal positioning groove (16) for the rectangular positioning block (3) and the trapezoidal positioning block (15) to be inserted, respectively. The trapezoidal positioning groove (16) is located directly above the first rectangular positioning groove (4).

4. The bidirectional positioning and locking mechanism for casting molds according to claim 1, characterized in that: The positioning seat (14) has a second rectangular positioning groove (6) laterally opened inside. A push plate (8) is slidably connected to the inside of the second rectangular positioning groove (6) from left to right. A push rod (9) is fixedly connected to the side of the push plate (8) away from the first rectangular positioning groove (4) from the side.

5. The bidirectional positioning and locking mechanism for casting molds according to claim 4, characterized in that: The push rod (9) is fitted with a first spring (10), which is connected between the push plate (8) and the inner wall of the second rectangular positioning groove (6). One end of the push rod (9) and the push plate (8) extends through the positioning seat (14) to the outer wall and is fixedly connected to a circular plate (11).

6. The bidirectional positioning and locking mechanism for casting molds according to claim 1, characterized in that: The protrusion locking structure (7) includes a second spring (12) that is laterally connected in the inner cavity (5) of the rectangular positioning block (3), and a protrusion (13) is fixedly connected to one end of the second spring (12) near the second rectangular positioning groove (6).

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