A gate pinching mechanism

Abstract

The utility model relates to injection molding processing equipment technical field discloses a gate shears mechanism, including installation base plate, installation base plate fixed connection rotating air cylinder, rotating air cylinder fixed connection connecting plate, connecting plate fixed connection sliding seat, the sliding seat is set up the sliding slot, the sliding slot sliding connection sliding tenon, sliding tenon fixed connection pneumatic nozzle tongs, sliding seat fixed connection micro motion air cylinder, micro motion air cylinder fixed connection pneumatic nozzle tongs, crossbeam fixed connection installation base plate, vertical beam fixed connection crossbeam, inclined bracing frame fixed connection vertical beam and crossbeam, vertical beam fixed connection fixed sheet, the utility model discloses a rotating air cylinder drive pneumatic nozzle tongs carries out macroscopic displacement, and the micro motion air cylinder pushes along with the linear fine adjustment of sliding slot of cooperation pneumatic nozzle tongs, and the positioning error is eliminated to double regulation mode, ensures that the pneumatic nozzle tongs blade and injection molding piece nozzle are aligned, avoids cutting or cutting injury injection molding piece ontology, promotes to go to water work processing yield.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to a runner shearing mechanism. Background Technology

[0002] After the injection molded part is removed from the mold, the surface of the part is covered with waste material from the sprue and gate generated during the molding process. The injection molding production process requires the use of matching cutting tools to cut and remove the sprue and gate, peeling off the excess material to obtain a finished injection molded part with smooth edges.

[0003] Existing technologies typically employ fixed punch cutters for scrap shearing. Once installed, the fixed punch cutter's spatial position is locked, preventing relative positional compensation based on the placement deviation of the injection molded part. When facing injection molded parts with positional deviations, the fixed punch cutter exhibits significant positioning errors. Furthermore, it is difficult to maintain precise physical alignment between the cutting edge of the punch cutter and the sprue ribs of the injection molded part. Misalignment between the cutting edge and the sprue ribs can lead to structural problems such as incomplete cuts to the gating system and cutting damage to the injection molded part itself, thus reducing the processing yield of the dewatering operation.

[0004] Therefore, this utility model proposes a gating shearing mechanism to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the structural problems in the existing runner shearing mechanism, which uses a fixed punch to cut the runner and gate of the injection molded part, such as large positioning errors and difficulty in maintaining precise alignment between the blade and the gate rib of the injection molded part, resulting in incomplete cutting and cutting edge exceeding the boundary and damaging the injection molded part body, this utility model provides a runner shearing mechanism with an improved structure.

[0006] This utility model provides a gating cutter mechanism, including a mounting base and a rotary cylinder fixedly connected to the top wall of the mounting base. The output end of the rotary cylinder is fixedly connected to a connecting plate. A sliding seat is symmetrically fixedly connected to the top wall of the connecting plate. A sliding groove is opened inside the sliding seat. A sliding tenon is slidably connected to the inner wall of the sliding groove. A pneumatic sprue clamp is fixedly connected to the top wall of the sliding tenon. The fixed end of a micro-motion cylinder is fixedly connected to the inner wall of the sliding seat. The movable end of the micro-motion cylinder is fixedly connected to the outer wall of the pneumatic sprue clamp. The rotary cylinder provides torque to drive the connecting plate and the upper component to rotate and align horizontally. The movable end of the micro-motion cylinder extends and retracts to push the sliding tenon at the bottom of the pneumatic sprue clamp to make linear fine-tuning and alignment along the sliding groove. The rotary cylinder and the micro-motion cylinder together construct a polar coordinate composite adjustment and execution structure covering two-level variables of angle and distance.

[0007] Preferably, the extension axis of the micro-motion cylinder is parallel to the length extension direction of the slide groove. This parallel arrangement ensures that the direction of the propulsion driving force output by the micro-motion cylinder is completely coincident with the linear displacement trajectory of the pneumatic sprue clamp, thus avoiding the generation of lateral load force by the micro-motion cylinder during the pushing and pulling of the pneumatic sprue clamp and extending the mechanical fatigue life of the pneumatic drive component.

[0008] Preferably, the sliding tenon is embedded inside the sliding groove, and the outer wall of the sliding tenon slides and fits against the inner wall of the sliding groove. The sliding and fitting mating surfaces provide a linear guiding function while creating a large area of ​​uniform contact support, thus preventing the pneumatic sprue clamp from radially swaying when cutting hard injection molded materials under force.

[0009] Preferably, a crossbeam is fixedly connected to the bottom wall of the mounting base plate. The crossbeam supports the mounting base plate above and serves as the lower foundation load-bearing frame to transmit working vibrations downwards.

[0010] Preferably, a vertical beam is fixedly connected to the top wall end of the crossbeam. The vertical beam and the crossbeam are perpendicular to each other and form an L-shaped support. The L-shaped support constitutes a cantilever support with a preset height and lateral space span, which facilitates crossing physical obstacles on the external work platform.

[0011] Preferably, the side wall of the vertical beam is fixedly connected to a diagonal brace, the diagonal brace is fixedly connected to the top wall of the horizontal beam, and the diagonal brace is fixedly connected to the side wall of the vertical beam by welding. The metal fusion and consolidation node formed by welding constructs a triangular stable load-bearing body with high compressive strength between the vertical beam and the horizontal beam, resisting the high-frequency reaction impact force generated when the pneumatic sprue clamp instantly cuts off the sprue nozzle.

[0012] Preferably, a fixing plate is fixedly connected to the top of the vertical beam. The surface of the fixing plate is provided with an installation through hole. The fixing plate is fixedly connected to the external mounting base. The fixing plate with the installation through hole provides assembly reserved space for external fastening bolts to pass through and maintains the spatial position stability of the entire mechanism mounted on the external frame.

[0013] This utility model has the following beneficial effects: 1. This utility model uses a rotary cylinder to drive a pneumatic sprue clamp to perform macroscopic horizontal angle displacement, and a micro-motion cylinder to push the pneumatic sprue clamp to perform fine-tuning in a straight line along the slide groove. The two-stage spatial position adjustment mode of rotation and straight line combination eliminates the defect of large positioning error of traditional fixed cutter, ensuring that the shearing blade of the pneumatic sprue clamp is aligned with the sprue rib of the injection molded part, avoiding the phenomenon of not being able to cut or the cutting edge damaging the injection molded part body, and improving the processing yield of the water removal operation of injection molded parts.

[0014] 2. This utility model uses horizontal and vertical beams assembled perpendicularly to form the main body of the support frame. Combined with the triangular reinforcement mechanical structure formed between the horizontal and vertical beams by the diagonal bracing, it provides a stable cantilever support working platform when the pneumatic sprue clamp closes its blade to perform the scrap shearing action. The fixed nodes formed by the diagonal bracing, vertical beams and horizontal beams effectively transmit and disperse the reaction impact force generated instantaneously during the shearing of the injection molding part's gating system, preventing the pneumatic sprue clamp from undergoing spatial displacement or force shift, and ensuring the stability of the equipment operation under continuous high-frequency shearing operation.

[0015] 3. This utility model, by opening a sliding groove inside the sliding seat and configuring a sliding tenon that cooperates with the sliding groove at the bottom of the pneumatic sprue clamp, restricts the degree of freedom of the pneumatic sprue clamp during linear fine-tuning movement by forming a sliding contact surface between the sliding tenon and the inner wall of the sliding groove. The sliding contact surface provides a uniform guiding contact area and bears the lateral torque when shearing force is applied, preventing the pneumatic sprue clamp from swaying when pushed by the micro-motion cylinder, so that the movement trajectory is kept on the preset cutting path, and increasing the positioning accuracy of the overall action of the sprue clamp mechanism. Attached Figure Description

[0016] Figure 1 This is a perspective view of a gating shearing mechanism proposed in this utility model; Figure 2 This is an exploded view of a gating shearing mechanism proposed in this utility model; Figure 3 This is a partial structural exploded view of a gating shearing mechanism proposed in this utility model; Figure 4 This is a partial structural diagram of a gating shearing mechanism proposed in this utility model.

[0017] Legend: 1. Mounting base plate; 2. Rotary cylinder; 3. Connecting plate; 4. Sliding seat; 5. Slide groove; 6. Pneumatic sprue clamp; 7. Sliding tenon; 8. Micro-motion cylinder; 9. Crossbeam; 10. Vertical beam; 11. Fixing plate; 12. Diagonal brace. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0019] Example: Please refer to Figures 1 to 4This utility model provides a sprue shearing mechanism, which solves the structural problems in the prior art where large positioning errors and misalignment of sprue ribs and blades cause incomplete cutting or damage to the product body when shearing injection molded parts' sprues and gates. Please refer to [link / reference]. Figure 1 and Figure 2 The runner shearing mechanism includes a mounting base 1 and a rotary cylinder 2 fixedly connected to the top wall of the mounting base 1. The mounting base 1 serves as the basic support base for the entire device, and the rotary cylinder 2 serves as the power source to provide planar rotation to adjust the macroscopic shearing angle.

[0020] A connecting plate 3 is fixedly connected to the output end of the rotary cylinder 2. A sliding seat 4 is symmetrically fixedly connected to the top wall of the connecting plate 3. A sliding groove 5 is opened inside the sliding seat 4. A sliding tenon 7 is slidably connected to the inner wall of the sliding groove 5. A pneumatic sprue clamp 6 is fixedly connected to the top wall of the sliding tenon 7. The connecting plate 3 is used to bear the torque of the rotary cylinder 2 and support the sliding seat 4. The sliding seat 4 and the sliding groove 5 opened inside it are used as a guide rail constraint platform to provide linear motion. The pneumatic sprue clamp 6 is used to close the blade to perform the scrap shearing action.

[0021] The inner wall of the sliding seat 4 is fixedly connected to the fixed end of the micro-motion cylinder 8. The movable end of the micro-motion cylinder 8 is fixedly connected to the outer wall of the pneumatic sprue clamp 6. The extension axis of the micro-motion cylinder 8 is parallel to the length extension direction of the slide groove 5. The sliding tenon 7 is embedded in the interior of the slide groove 5, and the outer wall of the sliding tenon 7 slides against the inner wall of the slide groove 5. The sliding tenon 7 is used to restrict the degree of freedom of the pneumatic sprue clamp 6 to reciprocating along a straight line. The micro-motion cylinder 8 is used to push the pneumatic sprue clamp 6 to make relative displacement along the slide groove 5 and to make linear fine adjustment and alignment.

[0022] It also includes crossbeam 9, please refer to Figure 3 and Figure 4 The crossbeam 9 and the aforementioned mounting base plate 1 form a support relationship. The crossbeam 9 is fixedly connected to the bottom wall of the mounting base plate 1. The crossbeam 9 is used to support the mounting base plate 1 installed above and related moving components that perform shearing actions. A vertical beam 10 is fixedly connected to the top wall end of the crossbeam 9. The vertical beam 10 and the crossbeam 9 are perpendicular to each other and form an L-shaped bracket. The vertical beam 10 is used to provide the vertical installation height span and cooperate with the crossbeam 9 to form a rigid support body in a cantilever state.

[0023] A diagonal brace 12 is fixedly connected to the side wall of the vertical beam 10. The diagonal brace 12 is fixedly connected to the top wall of the horizontal beam 9. The ends of the diagonal brace 12 are fixedly connected to the side wall of the vertical beam 10 and the top wall of the horizontal beam 9 by welding. The diagonal brace 12 is used to construct a stable triangular mechanical force-bearing structure between the vertical beam 10 and the horizontal beam 9. The diagonal brace 12 enhances the compressive structural rigidity of the support body composed of the horizontal beam 9 and the vertical beam 10 and resists the reverse impact force generated when the lower part performs the shearing action. A fixing plate 11 is fixedly connected to the top of the vertical beam 10. The surface of the fixing plate 11 is provided with a mounting through hole. The fixing plate 11 is fixedly connected to the external mounting base surface by fastening bolts passing through the mounting through hole. The fixing plate 11 is used to hoist and fasten the entire gating shearing mechanism to the working frame of the external equipment. The fixing plate 11, together with the support system composed of the vertical beam 10 and the horizontal beam 9, ensures the spatial position stability of the gating shearing mechanism during the working force process.

[0024] For the configuration of the external pneumatic power source that drives the rotary cylinder 2 and the micro-motion cylinder 8, those skilled in the art use a conventional combination of solenoid valve and air source pump for drive connection. The internal flow channel arrangement and pneumatic output structure of the matching control valve group are well known technologies in the field, and will not be described in detail here.

[0025] The telescopic axis of the micro-motion cylinder 8 is parallel to the length extension direction of the slide groove 5. The parallel micro-motion cylinder 8 is used to provide a pushing driving force that is collinear with the guide trajectory. In order to prevent the component from swaying when moving in a straight line and to improve the mechanical guide alignment accuracy, the sliding tenon 7 is embedded in the inside of the slide groove 5, and the outer wall of the sliding tenon 7 slides against the inner wall of the slide groove 5. The sliding contact surface formed by the sliding tenon 7 and the outer and inner walls is used to provide a uniform guide friction contact area and to bear the lateral torque when the pneumatic sprue clamp 6 is working.

[0026] As another preferred embodiment, the ends of the diagonal brace 12 are fixedly connected to the side wall of the vertical beam 10 and the top wall of the horizontal beam 9 by welding, respectively. The welded connection area formed at the ends of the diagonal brace 12 serves as a non-removable rigid connection node and stably transmits the reaction impact force applied to the support body during the execution of the action.

[0027] As another preferred embodiment, the surface of the fixing plate 11 is provided with a mounting through hole. The fixing plate 11 is fixedly connected to the external mounting base by fastening bolts passing through the mounting through hole. The mounting through hole on the surface of the fixing plate 11 serves as a physical assembly space to accommodate the bolt shank passing through and to generate a clamping force with the external nut.

[0028] Working principle: When the injection molded part needs to be demolded and the gate shearing operation is required, the rotary cylinder 2 fixed to the top wall of the mounting base 1 is started. The output torque of the rotary cylinder 2 drives the connecting plate 3 and the sliding seat 4 fixed to the top wall of the connecting plate 3 to rotate horizontally. The rotary cylinder 2 is used to drive the shearing blade of the pneumatic gate clamp 6 to perform macroscopic rotation and displacement to initially align the sprues and gates distributed at different angles. After the macroscopic alignment is completed, the micro-movement cylinder 8 fixed to the inner wall of the sliding seat 4 is activated. The movable end of the micro-movement cylinder 8 extends and retracts, pushing the pneumatic sprue clamp 6 to undergo relative displacement. The sliding tenon 7 at the bottom of the pneumatic sprue clamp 6 slides linearly along the length extension direction in the sliding groove 5 inside the sliding seat 4. The sliding fit between the micro-movement cylinder 8 and the sliding tenon 7 and the sliding groove 5 is used to make a horizontal fine adjustment to the position of the pneumatic sprue clamp 6. The linear advancement action of the micro-movement cylinder 8 eliminates the radial position error caused by the rotational alignment action and makes the blade of the pneumatic sprue clamp 6 precisely aligned with the sprue rib of the injection molded part. After positioning, the pneumatic sprue clamp 6 closes its blade to perform cutting operations and cut off the sprue waste. The mechanical force during the operation is borne and transmitted downward by the crossbeam 9, the vertical beam 10 and the diagonal support frame 12. The crossbeam 9, the vertical beam 10 and the diagonal support frame 12, together with the fixing plate 11, are used to transmit the reverse cutting impact force generated by the pneumatic sprue clamp 6 during operation to the external mounting base and maintain the overall spatial stability of the sprue cutting mechanism.

Claims

1. A gate shearing mechanism comprising a mounting base plate (1), a rotary air cylinder (2) is fixedly connected to the top wall of the mounting base plate (1), characterized in that, The output end of the rotary cylinder (2) is fixedly connected to a connecting plate (3). A sliding seat (4) is symmetrically fixedly connected to the top wall of the connecting plate (3). A sliding groove (5) is provided inside the sliding seat (4). A sliding tenon (7) is slidably connected to the inner wall of the sliding groove (5). A pneumatic sprue clamp (6) is fixedly connected to the top wall of the sliding tenon (7). The fixed end of a micro-motion cylinder (8) is fixedly connected to the inner wall of the sliding seat (4). The movable end of the micro-motion cylinder (8) is fixedly connected to the outer wall of the pneumatic sprue clamp (6).

2. The gating system shearing mechanism according to claim 1, characterized in that, The telescopic axis of the micro-motion cylinder (8) is parallel to the length extension direction of the slide groove (5).

3. The gating system shearing mechanism according to claim 1, characterized in that, The outer wall of the sliding tenon (7) slides and fits against the inner wall of the sliding groove (5).

4. The gating system shearing mechanism according to claim 1, characterized in that, A crossbeam (9) is fixedly connected to the bottom wall of the mounting base plate (1).

5. The gating system shearing mechanism according to claim 4, characterized in that, A vertical beam (10) is fixedly connected to the top wall end of the crossbeam (9). The vertical beam (10) and the crossbeam (9) are perpendicular to each other and form an L-shaped support.

6. The gating system shearing mechanism according to claim 5, characterized in that, The side wall of the vertical beam (10) is fixedly connected to a diagonal brace (12), and the diagonal brace (12) is fixedly connected to the top wall of the horizontal beam (9).

7. The gating system shearing mechanism according to claim 6, characterized in that, The diagonal brace (12) is fixedly connected to the side wall of the vertical beam (10) by welding.

8. The gating system shearing mechanism according to claim 5, characterized in that, The top end of the vertical beam (10) is fixedly connected to a fixing plate (11).

9. A sprue removal mechanism according to claim 8, characterized in that, The surface of the fixing plate (11) is provided with an installation through hole, and the fixing plate (11) is fixedly connected to the external mounting base.

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