A trimming die

Abstract

The utility model relates to workpiece processing technical field provides a mobile device for double -color injection molding machine for cutting off the runner on the shaped casting, and the edge cutting mould includes: the fixed mould plate, the movable mould plate can be with fixed mould plate activity and abut, the fixed unit has the fixed block set up on the movable mould plate, and the fixed seat is set up on the fixed mould plate, and the fixed seat is used for providing the support for the casting, when the fixed mould plate and movable mould plate abut, the fixed block is pressed on the casting on the fixed seat, is used for the clamping fixed of casting, the cutting unit is set up on the fixed mould plate, and has the movable setting saw blade, and the saw blade is used for cutting the runner part of the clamping fixed casting. Replace the traditional punching blade mouth with the rotary saw blade, solve the thick cross section runner cutting difficult, the mould easy to damage problem, compared with artificial cutting, realize the automation operation, reduce the labor intensity, promote the efficiency, the consistency and the surface quality, eliminate the spark splashing, blade fracture and other security hidden danger.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece processing technology, and specifically relates to a trimming mold. Background Technology

[0002] In the casting process, molten metal is injected into the mold cavity through a gating system. The resulting casting typically has a sprue (also known as a gate or ingate) connected to the body. This sprue is an essential channel for the casting process, but it must be removed before the casting becomes a finished product. Traditional methods for sprue removal mainly include stamping and die trimming, and manual grinding / cutting.

[0003] Currently, most small and medium-sized castings utilize automated or semi-automated sprue removal processes using upper and lower interlocking cutting dies. These dies typically employ cutting edges between the upper and lower dies to shear and separate thin sprues, offering advantages such as high efficiency and good consistency. However, for some castings with complex structures or thick walls, the ingate is often designed to be quite thick (i.e., "ultra-thick gate") to ensure mold filling integrity and feeding effect. The cross-sectional thickness of these ultra-thick sprues often exceeds the shearing capacity limit of traditional cutting die edges. If forcibly removed using punching methods, it can easily lead to die edge breakage, casting deformation, or even equipment damage.

[0004] Therefore, in existing technologies, the removal of finished castings with ultra-thick gating systems still generally relies on manual hand-held grinding wheels or cutting machines. This method is not only labor-intensive and inefficient, but also makes it difficult to guarantee cutting accuracy, easily resulting in gating residue or damage to the casting itself, affecting the product's appearance quality and subsequent processing precision. In addition, manual operation also poses certain safety risks, such as sparks flying and tool loss of control, which is detrimental to safe production and the integration of automated production lines. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, the technical problem to be solved by this utility model is as follows: a cutting mold is proposed that uses a fixed block and a fixed seat to clamp the casting, and a rotating saw blade to replace the traditional punching blade, which solves the problems of difficult cutting of thick cross-section sprues and easy mold damage, and significantly broadens the application range; compared with manual cutting, it realizes automated operation, reduces labor intensity, improves efficiency, consistency and surface quality, eliminates safety hazards such as sparks and blade breakage, and facilitates automated integration.

[0006] The technical solution adopted by this utility model to solve its technical problem is to provide a trimming die for cutting off the sprue on a forming casting, the trimming die comprising:

[0007] Fixed mold assembly;

[0008] A movable mold assembly, which is movable relative to the fixed mold assembly and movably abuts against the fixed mold assembly;

[0009] A fixing unit has a fixing block disposed on the moving mold assembly and a fixing seat disposed on the fixed mold assembly, the fixing seat being used to provide support for the casting;

[0010] When the fixed mold assembly abuts against the moving mold assembly, the fixing block presses against the casting located on the fixing seat, thereby clamping and fixing the casting between the fixing block and the fixing seat;

[0011] A cutting unit is disposed on the fixed mold assembly and has a movable saw blade for cutting the gating portion of the clamped and fixed casting.

[0012] In one of the above-mentioned edge-cutting molds, the fixing seat has a placement groove, and when the casting is placed in the placement groove, the sprue on the casting extends to the outside of the fixing seat.

[0013] In one of the above-mentioned edge-cutting molds, a positioning block is also provided on the fixed base. The positioning block abuts against the outer wall of the casting and is used to position the casting.

[0014] In one of the above-mentioned edge-cutting molds, the fixing block has a contoured surface that matches the outer contour of the casting.

[0015] In one of the aforementioned edge-cutting molds, the cutting unit further includes:

[0016] A movable seat, which is slidably disposed on the fixed mold assembly;

[0017] A first driving member is disposed on the movable base, and the saw blade is connected to the output end of the first driving member. The first driving member is used to drive the saw blade to rotate.

[0018] In the aforementioned edge-cutting mold, the cutting unit further includes a second driving member, which is disposed on the fixed mold assembly, and the output end of the second driving member is connected to the movable seat. The second driving member is used to drive the movable seat to move.

[0019] In the aforementioned edge-cutting mold, the fixed mold assembly is further provided with a guide rail, and the bottom of the movable seat is provided with a slider, which is slidably mounted on the guide rail via the slider.

[0020] In the aforementioned edge-cutting mold, the fixed mold assembly is further provided with a detection element, and the movable seat is provided with a trigger part. The trigger part contacts and cooperates with the detection element to provide a limit for the movement of the movable seat.

[0021] In the aforementioned edge-cutting mold, the fixed mold assembly is provided with two detection elements, which correspond to the starting position and the ending position of the moving seat's travel stroke, respectively, so as to limit the movement stroke of the moving seat at both ends.

[0022] In the aforementioned edge-cutting mold, the moving mold assembly is provided with a guide post, and the fixed mold assembly is provided with a guide sleeve. The guide post is movably inserted into the guide sleeve to provide guidance for the movement of the moving mold assembly relative to the fixed mold assembly.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The fixed unit achieves reliable clamping of the molded casting through the synergistic action of the fixed block and the fixed seat. The rotating saw blade in the cutting unit replaces the traditional punching blade, which can effectively remove thick-section sprues, avoid incomplete cutting or mold damage, and significantly expand the applicability of the trimming mold in this solution. Compared with manual operation methods such as handheld angle grinders, this solution achieves automatic cutting, greatly reduces the labor intensity of operators, improves production efficiency, batch consistency and product surface quality, and eliminates safety risks such as sparks and blade breakage, which is conducive to integration into automated production lines.

[0025] (2) The casting is quickly positioned by the placement slot and positioning block on the fixed seat. The large-area fitting and clamping is achieved by combining the contour surface on the fixed block, which disperses stress, prevents damage to the casting, and effectively suppresses cutting vibration, ensuring clamping stability and machining accuracy.

[0026] (3) The cutting unit adopts a sequential control mechanism of “starting rotation first and then feeding”, combined with guide rail guidance and stroke limit detection, to achieve smooth entry, uniform speed cutting and precise stopping, ensuring that the cut is flat and burr-free. The overall structure is reliable and precise in operation, and has good prospects for industrial application. Attached Figure Description

[0027] Figure 1 This is a 3D view of the fixed mold component in this solution.

[0028] Figure 2 This is a 3D view of the moving model component in this solution.

[0029] Figure 3 yes Figure 1 A 3D view of the hidden part of the structure.

[0030] In the figure, 1. Fixed mold assembly; 2. Moving mold assembly; 3. Fixed block; 4. Fixed seat; 5. Cutting unit; 6. Saw blade; 7. Positioning block; 8. Contouring surface; 9. Moving seat; 10. First driving component; 11. Second driving component; 12. Guide rail; 13. Slider; 14. Detection component; 15. Trigger; 16. Guide post; 17. Guide sleeve. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] like Figures 1 to 3 As shown, this solution provides a trimming mold for cutting off the sprue on a molded casting. The trimming mold includes: a fixed mold assembly 1; a movable mold assembly 2, which is movable relative to the fixed mold assembly 1 and movably abuts against the fixed mold assembly 1; a fixing unit, which has a fixing block 3 disposed on the movable mold assembly 2 and a fixing seat 4 disposed on the fixed mold assembly 1, the fixing seat 4 being used to provide support for the casting; when the fixed mold assembly 1 abuts against the movable mold assembly 2, the fixing block 3 presses against the casting located on the fixing seat 4, for clamping and fixing the casting between the fixing block 3 and the fixing seat 4; and a cutting unit 5, which is disposed on the fixed mold assembly 1 and has a movably disposed saw blade 6, the saw blade 6 being used to cut the sprue portion of the clamped and fixed casting.

[0034] In practical applications, the moving mold assembly 2 is fixedly installed on the hydraulic press, and the hydraulic press provides power to drive it to reciprocate linearly relative to the fixed mold assembly 1 along a preset path.

[0035] During operation, the operator or automated robot first accurately places the completed casting, cooled and demolded part into the fixed seat 4 on the fixed mold assembly 1. Then, the hydraulic press is started, driving the moving mold assembly 2 to move. As the moving mold assembly 2 moves, the fixed block 3 on it gradually approaches and finally presses against the outer surface of the casting. When the clamping force reaches the set value, the system determines that the clamping process is complete, and the moving mold assembly 2 stops moving. After confirming that the casting has been reliably clamped, the cutting unit 5 is started, driving the saw blade 6 to move and automatically cut the sprue on the casting. The saw blade 6 is made of high-strength alloy steel or diamond-coated blades, possessing excellent wear resistance and impact resistance. Even when facing sprues formed by thick ingates, it can achieve fast and thorough cutting, avoiding problems such as incomplete cutting, burrs on the cut surface, or material tearing.

[0036] In cutting unit 5, a saw blade 6 replaces the traditional punching-type cutting edge structure, effectively addressing the challenges of thicker, wider-section ingates on finished castings. This overcomes the technical difficulties of insufficient shearing force leading to punching edge breakage, casting deformation, and even equipment damage, significantly expanding the application range of trimming dies. Compared to the traditional method of manually removing gates using handheld angle grinders or abrasive wheel cutters, the trimming die in this solution achieves automated operation, significantly reducing the labor intensity of operators and greatly improving production efficiency and batch consistency. Because the cutting action is precisely controlled by the equipment, the cutting position is fixed, and the depth is consistent, effectively avoiding common problems in manual operation such as gate residue, over-cutting, or accidental damage to the casting itself, thus ensuring product surface quality and the reference accuracy for subsequent machining. Furthermore, the entire cutting process is completed within the die structure, avoiding safety risks such as sparks, blade breakage, or tool loss of control that may occur during manual handheld tool operation, significantly improving operational safety and facilitating integration into automated production lines.

[0037] More preferably, the fixing seat 4 has a placement groove. When the casting is placed in the placement groove, the sprue on the casting extends to the outside of the fixing seat 4, which facilitates the saw blade 6 in the cutting unit 5 to cut it.

[0038] To further improve the positioning accuracy of castings during clamping, a positioning block 7 is also provided on the fixed base 4. The positioning block 7 contacts and cooperates with the outer wall of the casting to achieve rapid and accurate positioning of the casting.

[0039] To ensure the stability of the clamping process, the fixing block 3 is provided with a contoured surface 8, which matches the outer contour of the casting, enabling large-area contact, effectively dispersing clamping pressure, avoiding local stress concentration that could damage the casting, and preventing the workpiece from loosening due to vibration or cutting force during the cutting process.

[0040] More preferably, the cutting unit 5 further includes: a movable seat 9, which is slidably disposed on the fixed mold assembly 1; a first driving member 10, which is connected to the movable seat 9, and the saw blade 6 is connected to the output end of the first driving member 10, the first driving member 10 being used to drive the saw blade 6 to rotate.

[0041] More preferably, the cutting unit 5 further includes a second driving member 11, which is disposed on the fixed mold assembly 1, and the output end of the second driving member 11 is connected to the movable seat 9. The second driving member 11 is used to drive the movable seat 9 to move.

[0042] In order to allow the movable seat 9 to slide on the fixed mold assembly 1, the fixed mold assembly 1 is also provided with a guide rail 12, and the bottom of the movable seat 9 is provided with a slider 13, and the movable seat 9 is slidably mounted on the guide rail 12 via the slider 13.

[0043] Once the casting is securely clamped between the fixing block 3 and the fixing seat 4, the cutting unit 5 is activated. First, the first drive unit 10 starts, driving the saw blade 6 to rotate, and maintains stable operation after reaching the set speed. Then, the second drive unit 11 starts, driving the moving seat 9 to move along the guide rail 12 from the starting position to the ending position. During the movement, the saw blade 6 gradually cuts into the sprue on the casting and completes the entire cut. When the moving seat 9 reaches the ending position, the saw blade 6 has completed the cutting operation of the entire sprue. Afterward, the second drive unit 11 drives the moving seat 9 back to the starting position, the first drive unit 10 stops operating, and the cutting process ends. Preferably, the first drive unit 10 is a rotary motor, and the second drive unit 11 can be a motor, hydraulic cylinder, or pneumatic cylinder.

[0044] By controlling the rotation and feed motion of the saw blade 6 in steps, it is ensured that the saw blade 6 only starts cutting into the material after reaching a stable speed, avoiding tool impact, breakage or motor overload caused by cold start cutting, thus improving the safety and reliability of equipment operation.

[0045] The moving seat 9 achieves high-precision linear motion through the guiding mechanism composed of the guide rail 12 and the slider 13, and works with the second driving component 11 to achieve uniform feed, so that the saw blade 6 is subjected to uniform force throughout the entire cutting stroke, and the cut is flat and burr-free, effectively improving the surface quality of the processed surface.

[0046] In summary, this invention not only solves the technical problem that traditional blanking dies cannot handle ultra-thick sprues, but also achieves efficient, safe and precise removal of complex casting sprues through a collaborative mechanism of rotary sawing, linear feed and sequential control. It also has the advantages of high automation, simple operation and stable operation, and has good industrial application prospects and promotion value.

[0047] To precisely control the movement stroke of the movable seat 9, a detection element 14 is provided on the fixed mold assembly 1, and a corresponding trigger part 15 is provided on the movable seat 9. When the movable seat 9 moves to a preset position, the trigger part 15 contacts the detection element 14. The detection element 14 responds to this contact action by generating an electrical signal and sending the signal to the control system to confirm that the movable seat 9 has reached the designated position, thereby achieving limit control of its movement stroke. The detection element 14 is preferably a contact switch.

[0048] More preferably, the fixed mold assembly 1 is provided with two detection elements 14, which correspond to the starting position and the cutting completion position of the moving seat 9 respectively. The starting position detection element 14 is used to confirm whether the moving seat 9 has returned to the starting standby position, which is a prerequisite for starting each cutting cycle; the ending position detection element 14 is used to detect whether the moving seat 9 has reached the cutting end point, so as to avoid overtravel.

[0049] In order to provide guidance for the movement of the moving mold assembly 2 relative to the fixed mold assembly 1, a guide post 16 is provided on the moving mold assembly 2 and a guide sleeve 17 is provided on the fixed mold assembly 1. The guide post 16 is movably inserted into the guide sleeve 17 to provide guidance for the movement of the moving mold assembly 2 relative to the fixed mold assembly 1.

[0050] When the moving mold assembly 2 approaches the fixed mold assembly 1 under the drive of the hydraulic press, the guide post 16 is inserted into the guide sleeve 17 and slides along its inner wall; as the moving mold assembly 2 continues to approach, the guide post 16 slides smoothly in the guide sleeve 17 until the moving mold assembly 2 reaches the preset position and abuts against the fixed mold assembly 1.

[0051] By setting guide posts 16 on the moving mold assembly 2 and guide sleeves 17 on the fixed mold assembly 1, and making them slide together, the movement trajectory of the moving mold assembly 2 can be effectively constrained, preventing it from shifting or tilting during movement. As the moving mold assembly 2 approaches the fixed mold assembly 1, the cooperation of the guide posts 16 and guide sleeves 17 guides the moving mold assembly 2 to accurate alignment in advance, ensuring precise contact between the fixing block 3 and the fixing seat 4, thereby improving the stability and repeatability of the casting clamping. Simultaneously, this guiding structure has the advantages of high load-bearing capacity, smooth operation, and low wear, which can significantly extend the service life of the mold and reduce cutting deviations caused by misalignment, improving edge cutting quality and production efficiency.

[0052] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0054] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A trimming die for cutting off the sprue on a shaped casting, characterized in that, The trimming die includes: Fixed mold assembly; A movable mold assembly, which is movable relative to the fixed mold assembly and movably abuts against the fixed mold assembly; A fixing unit has a fixing block disposed on the moving mold assembly and a fixing seat disposed on the fixed mold assembly, the fixing seat being used to provide support for the casting; When the fixed mold assembly abuts against the moving mold assembly, the fixing block presses against the casting located on the fixing seat, thereby clamping and fixing the casting between the fixing block and the fixing seat; A cutting unit is disposed on the fixed mold assembly and has a movable saw blade for cutting the sprue portion of the clamped and fixed casting. The mounting base has a placement groove, and when the casting is placed in the placement groove, the sprue on the casting extends to the outside of the mounting base; The fixing base is also provided with a positioning block, which abuts against the outer side wall of the casting and is used to position the casting. The fixing block has a contoured surface that matches the outer contour of the casting; The cutting unit further includes: a movable seat, which is slidably disposed on the fixed mold assembly; a first driving member, which is disposed on the movable seat, and the saw blade is connected to the output end of the first driving member, the first driving member being used to drive the saw blade to rotate; The cutting unit further includes a second driving member, which is disposed on the fixed mold assembly, and the output end of the second driving member is connected to the movable seat. The second driving member is used to drive the movable seat to move. The fixed mold assembly is also provided with a guide rail, and the bottom of the movable seat is provided with a slider, and the movable seat is slidably mounted on the guide rail via the slider.

2. The edge-cutting mold as described in claim 1, characterized in that, The fixed mold assembly is also provided with a detection element, and the movable seat is provided with a trigger part. The trigger part contacts and cooperates with the detection element to provide a limit for the movement of the movable seat.

3. The edge-cutting mold as described in claim 2, characterized in that, The fixed mold assembly is provided with two detection elements, which correspond to the start position and end position of the moving base's travel stroke, respectively, so as to limit the movement stroke of the moving base at both ends.

4. The edge-cutting mold as described in claim 1, characterized in that, The moving mold assembly is provided with a guide post, and the fixed mold assembly is provided with a guide sleeve. The guide post is movably inserted into the guide sleeve to provide guidance for the movement of the moving mold assembly relative to the fixed mold assembly.

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