A novel molding machine mold locking device

Abstract

This utility model relates to a novel mold locking device for a molding machine, comprising a guide sleeve. One end of the guide sleeve is laterally connected to a cylinder, and the other end is vertically connected to a guide frame consisting of four panels. The guide frame has through holes symmetrically arranged on its left and right sides. The piston rod of the cylinder passes into the guide sleeve, and a locking pin is axially fixed to its end face. The lower front side of the locking pin has a bevel. A cylindrical locking rod is vertically suspended above the top of the guide frame. The locking rod has a radially penetrating insertion hole at its end, and the bottom surface of the insertion hole has a bevel. This utility model achieves adaptive adjustment of the locking height through the cooperative design of the bevel of the locking pin and the bevel of the insertion hole in the locking rod, thus improving the versatility and adaptability of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of molding machine mold locking technology, and specifically relates to a novel molding machine mold locking device. Background Technology

[0002] Currently, when refrigerators are foam-molded, the assembled inner liner and outer shell are placed into a foam mold, closed and locked to form a sealed cavity. Then, mixed polyurethane raw materials are injected through a high-pressure injection device. The raw materials react chemically in the cavity and expand and fill it. After pressure holding and curing, a uniform insulation layer is formed. Finally, the mold is opened and the finished product is taken out.

[0003] The above process is crucial for mold closing, ensuring a tight seal to prevent leakage and controlling foam density and shape. However, existing molding machines typically use a fixed-position height locking method for mold locking, which may result in poor locking effect and low adaptability, failing to adequately meet production needs.

[0004] Therefore, we provide a new type of molding machine mold locking device that is applicable to different locking heights, improves equipment applicability, and is beneficial to actual production operations. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a novel mold locking device for molding machines. The specific technical solution is as follows: This utility model provides a novel mold locking device for a molding machine, including a guide sleeve. One end face of the guide sleeve is laterally connected to a cylinder, and the other end face is vertically connected to a guide frame with a cuboid structure formed by four panels. The guide frame has through holes vertically and symmetrically arranged on its left and right sides. The piston rod of the cylinder passes into the guide sleeve, and its end face is axially fixed with a locking pin, and the lower front part of the locking pin has an inclined surface. A cylindrical locking rod is vertically suspended above the top opening of the guide frame, and the end of the locking rod has a radially penetrating insertion hole, and the bottom surface of the insertion hole has an inclined surface. When the locking device is in the locked state, the end of the locking rod is vertically inserted into the guide frame under the action of external force. The piston rod of the cylinder extends outward and drives the locking pin to pass through the through hole of the guide frame and laterally into the insertion hole of the locking rod. The inclined surface of the locking pin slides and fits against the inclined surface of the insertion hole to adapt to different locking heights. When the locking device is in the unlocked state, the piston rod of the cylinder retracts inward and drives the locking pin to be pulled out from the insertion hole of the locking rod and retracted into the guide sleeve. The end of the locking rod is pulled out from the guide frame under the action of external force.

[0006] As a preferred embodiment of the present invention, a floating component is provided laterally on the top surface of the guide frame; The floating assembly includes a fixed frame horizontally fixed to the top surface of the guide frame, and a matching slide plate is horizontally placed inside the fixed frame. The bottom surface of the slide plate is slidably attached to the top surface of the guide frame. A circular guide hole is vertically opened through the slide plate. The guide hole is located directly above the top opening of the guide frame and the inner diameter of the guide hole is the same as the inner width of the guide frame. Two sets of opposite sides of the fixed frame are symmetrically fitted with spring plungers at vertical intervals. The inner ends of the spring plungers are elastically connected to the corresponding sides of the slide plate.

[0007] As a preferred technical solution of this utility model, an introductory angle is provided circumferentially at the top opening of the guide hole.

[0008] As a preferred embodiment of this utility model, the guide frame is a cubic structure.

[0009] As a preferred embodiment of this utility model, the guide frame is provided with observation holes that are perpendicularly and symmetrically arranged through it on the front and back sides.

[0010] As a preferred embodiment of this utility model, the through hole is circular, and the size of the through hole is adapted to the longitudinal cross-sectional size of the locking pin.

[0011] The beneficial effects of this utility model are: 1. This utility model achieves adaptive adjustment of locking height by the mutual cooperation between the inclined surface on the lower side of the front part of the locking pin and the inclined surface on the bottom surface of the middle hole of the locking rod, thereby improving the versatility and adaptability of the equipment.

[0012] 2. The adaptive locking mechanism and the continuous and stable locking force provided by the cylinder of this utility model ensure the sealing of the mold closing, effectively prevent the leakage of polyurethane raw materials, and ensure product quality.

[0013] 3. The guide sleeve and the guide frame formed by the four panels in this utility model improve the reliability and stability of the locking process and reduce the failure rate and maintenance cost. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown; Figure 2 A cross-sectional view of the present invention in its unlocked state is shown; Figure 3 A cross-sectional view of the present invention in the locked state is shown.

[0015] The figure shows: 1. Guide sleeve; 2. Cylinder; 3. Guide frame; 31. Through hole; 32. Observation hole; 4. Floating component; 41. Fixed frame; 42. Slide plate; 421. Guide hole; 422. Guide angle; 43. Spring plunger; 5. Locking rod; 51. Insertion hole; 6. Locking pin. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0017] Example 1 To address the technical problems in the background art, a novel mold locking device for molding machines is provided as follows: Combination Figures 1-3 As shown, a novel molding machine mold locking device includes a guide sleeve 1. One end face of the guide sleeve 1 is laterally connected to a cylinder 2, and the other end face is vertically connected to a guide frame 3, which is a cuboid structure formed by four panels. The guide frame 3 has through holes 31 vertically and symmetrically arranged on its left and right sides. The piston rod of the cylinder 2 passes into the guide sleeve 1, and its end face is axially fixed with a locking pin 6, and the lower front side of the locking pin 6 is provided with an inclined surface. A cylindrical locking rod 5 is vertically suspended directly above the top opening of the guide frame 3. The end of the locking rod 5 has a radially penetrating insertion hole 51, and the bottom surface of the insertion hole 51 is provided with an inclined surface. When the locking device is in the locked state, the end of the locking rod 5 is vertically inserted into the guide frame 3 under the action of external force. The piston rod of the cylinder 2 extends outward and drives the locking pin 6 to pass laterally from the through hole 31 of the guide frame 3 into the insertion hole 51 of the locking rod 5. The inclined surface of the locking pin 6 slides and fits against the inclined surface of the insertion hole 51 to adapt to different locking heights. When the locking device is in the unlocked state, the piston rod of the cylinder 2 retracts inward and drives the locking pin 6 to be pulled out from the insertion hole 51 of the locking rod 5 and retracted into the guide sleeve 1. The end of the locking rod 5 is pulled out from the guide frame 3 under the action of external force.

[0018] In the above technical solution, the locking device achieves adaptive adjustment of the locking height by the mutual cooperation between the inclined surface of the lower front part of the locking pin 6 and the inclined surface of the bottom surface of the insertion hole 51 in the locking rod 5, thereby improving the versatility and adaptability of the equipment.

[0019] When cylinder 2 pushes the locking pin 6 horizontally into place, the two inclined surfaces will first come into contact and slide relative to each other. Due to the guiding effect of the inclined surfaces, even if the locking rod 5 has a slight vertical height deviation due to the manufacturing tolerance of the mold itself, wear caused by long-term use, or replacement of different mold models, the locking pin 6 can automatically fine-tune its final locking position through the sliding of the inclined surfaces. This allows the same locking device to perfectly adapt to molds with different locking height requirements, solving the problems of low adaptability and poor locking effect caused by the fixed height of the existing technology, significantly improving the versatility of a single device, and reducing the equipment modification or adjustment time required for mold replacement.

[0020] The adaptive locking mechanism of the locking device and the continuous and stable locking force provided by cylinder 2 ensure the sealing of the mold, effectively prevent the leakage of polyurethane raw materials, and guarantee product quality.

[0021] When the piston rod extends, cylinder 2 maintains a constant pressure. Through the tight engagement of the locking pin 6 with the inclined surface of the insertion hole 51, the locking rod 5 is pulled downwards, thus firmly pressing the upper and lower molds together. This continuous pressure compensates for gaps caused by slight unevenness in the mold or housing, maintaining sufficient clamping force and ensuring the cavity's seal. This fundamentally prevents leakage of the high-pressure injected mixed polyurethane material from the mold joint surface, avoiding not only material waste and cleaning work, but more importantly, ensuring stable internal pressure during the foaming and molding of the insulation layer.

[0022] The guide sleeve 1 and the guide frame 3, which is composed of four panels, improve the reliability and stability of the locking process and reduce the failure rate and maintenance costs.

[0023] The guide sleeve 1 provides better guidance for the lateral movement of the cylinder piston rod and locking pin 6, ensuring high straightness of their movement trajectory and eliminating wobble, thereby guaranteeing that the locking pin 6 can be accurately aligned and inserted into the insertion hole 51. Simultaneously, the robust guide frame 3 provides stable guidance and support for the vertical insertion of the locking rod 5, preventing it from tilting under force. This dual-guide structure greatly improves the accuracy and repeatability of the entire locking action, reduces impacts, wear, and even damage caused by component misalignment, thereby improving the durability of the device and reducing the frequency of equipment failures and maintenance requirements.

[0024] like Figure 1 and Figure 2 As shown, the guide frame 3 has observation holes 32 that are vertically and symmetrically arranged through the front and back sides.

[0025] In the above technical solution, the observation hole 32 is positioned directly opposite the engagement area of ​​the locking pin 6 and the locking rod 5's insertion hole 51. Operators and maintenance personnel can observe through the two observation holes 32, front and rear, whether the locking pin 6 is accurately and completely inserted into the insertion hole 51, and whether the two beveled surfaces are tightly fitted, without disassembling any parts.

[0026] like Figure 2 and Figure 3 As shown, the through hole 31 has a circular structure, and the size of the through hole 31 is adapted to the longitudinal cross-sectional size of the locking pin 6.

[0027] In the above technical solution, the core function of the through hole 31 is to provide guidance and support for the lateral linear movement of the locking pin 6. The circular structure of the through hole 31 has no stress concentration points, which can evenly distribute the force transmitted from the locking pin 6 to the entire guide frame 3, avoiding local stress concentration caused by sharp corners or edges, and improving the fatigue strength and long-term durability of the structure surrounding the through hole 31.

[0028] The size of the through hole 31 is matched with the longitudinal cross-sectional size of the locking pin 6. This ensures the smooth movement of the locking pin 6 and controls the movement clearance within a minimum reasonable range, reducing the impact and wear caused by shaking and extending the service life of the locking pin 6 and the through hole 31 itself.

[0029] Example 2 Combination Figures 1-3 As shown, based on the above embodiments, this embodiment further provides the following: In this embodiment, as Figures 1-3 As shown, a floating component 4 is horizontally arranged on the top surface of the guide frame 3; the floating component 4 includes a fixed frame 41 horizontally fixed to the top surface of the guide frame 3, and a matching slide plate 42 is horizontally placed inside the fixed frame 41. The bottom surface of the slide plate 42 is slidably attached to the top surface of the guide frame 3. A circular guide hole 421 is vertically opened through the slide plate 42. The guide hole 421 is located directly above the top opening of the guide frame 3 and the inner diameter of the guide hole 421 is the same as the inner width of the guide frame 3. Spring plungers 43 are symmetrically embedded in two sets of opposite sides of the fixed frame 41 at vertical intervals. The inner end of the spring plunger 43 is elastically connected to the corresponding side of the slide plate 42.

[0030] In the above technical solution, the floating component 4 is composed of a fixed frame 41, a slidable slide plate 42, a guide hole 421, and a spring plunger 43 providing elastic connection. The slide plate 42 can float horizontally within a certain range within the fixed frame 41 under the elastic constraint of the spring plunger 43.

[0031] In large molds, the locking rod 5 may have a slight lateral positional deviation between its end and the top opening of the guide frame 3 during its descent due to its large length, thermal deformation, or vibration. In this case, a traditional rigid guide structure would cause the locking rod 5 to strike the edge of the guide frame 3, preventing it from being inserted smoothly, or even causing damage to the component.

[0032] In this locking device, when the locking rod 5 falls, even if its end is slightly offset, it will first contact the edge of the guide hole 421. Since the slide plate 42 is floating, under the action of the contact force, the entire slide plate 42 will move slightly on the horizontal plane along with the guide hole 421, thereby automatically aligning the guide hole 421 with the axis of the locking rod 5; avoiding jamming and impact caused by misalignment, and significantly improving the reliability and success rate of the mold closing action.

[0033] like Figure 2 As shown, the guide hole 421 has a guide angle 422 circumferentially provided at the top opening.

[0034] In the above technical solution, the set guide angle 422 greatly improves the guiding efficiency and reliability, achieving a "seamless" connection. When the lower end of the locking rod 5 falls, even if there is a deviation, its end will first contact not the right-angle edge, but the inclined surface of the guide angle 422; this inclined surface can effectively decompose the vertically downward impact force into a vertical component and a horizontal component. This horizontal component will naturally push the skateboard 42 to move horizontally, thus starting the floating self-alignment process more effortlessly and smoothly, greatly reducing the risk of action failure due to initial jamming.

[0035] like Figure 2 As shown, the guide frame 3 has a cubic structure.

[0036] In the above technical solution, the guide frame 3 is a cubic structure, which optimizes the force flow distribution and structural performance, and enhances stability and manufacturability. The cubic structure has high symmetry and uniform mechanical properties in three dimensions. It can evenly withstand the vertical pressure from the locking rod 5, the lateral shear force transmitted from the locking pin 6 through the through hole 31, and various complex stresses transmitted from the mold internal pressure during the foaming process through the structure, avoiding stress concentration caused by structural asymmetry, and ensuring the rigidity and stability of the entire locking device under long-term high-load operation.

[0037] Working principle and usage process of this utility model: In use, this utility model revolves around two states: locking and unlocking. Height adjustment is achieved through adaptive engagement of the inclined surface.

[0038] 1. Mold closing and locking process: First, the upper mold causes the locking rod 5 to fall vertically. The end of the locking rod 5 first passes through the guide hole 421 of the floating component 4, and its guide angle 422 guides the locking rod 5 to enter smoothly. Even if there is a slight centering deviation, the slide plate 42 can float horizontally under the action of the spring plunger 43, automatically compensating for the deviation and ensuring that the end of the locking rod 5 is smoothly inserted into the guide frame 3 without impact. Subsequently, the piston rod of the cylinder 2 extends outward, pushing the locking pin 6 to move laterally, passing through the circular through holes 31 on both sides of the guide sleeve 1 and the guide frame 3, and inserting it into the insertion hole 51 of the locking rod 5. During the insertion process, the inclined surface on the lower side of the locking pin 6 slides into contact with the inclined surface on the bottom surface of the insertion hole 51 and finally fits tightly. This inclined surface engagement mechanism can adaptively compensate for the slight height difference of the mold, and generate a solid locking force by pulling down the locking rod 5 to achieve reliable locking. The operator can confirm the engagement status of the two inclined surfaces through the observation hole 3).

[0039] 2. Mold opening and unlocking process: When mold opening is required, the piston rod of cylinder 2 retracts inward, causing the locking pin 6 to be smoothly pulled out from the insertion hole (51) of the locking rod 5 and returned to the guide sleeve 1, thus releasing the mechanical interlock. Subsequently, the upper mold can drive the locking rod 5 to move vertically upward, so that its end is completely pulled out from the guide frame 3 and the floating component 4, and the mold can be opened.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel mold locking device for a molding machine, characterized in that: The system includes a guide sleeve (1), one end of which is laterally connected to a cylinder (2), and the other end is vertically connected to a guide frame (3) consisting of four panels. The guide frame (3) has through holes (31) vertically and symmetrically arranged on its left and right sides. The piston rod of the cylinder (2) is inserted into the guide sleeve (1), and its end face is axially fixed with a locking pin (6). The lower front side of the locking pin (6) is provided with a slope. A cylindrical locking rod (5) is vertically suspended above the top opening of the guide frame (3). The end of the locking rod (5) is radially opened with an insertion hole (51), and the bottom surface of the insertion hole (51) is provided with a slope. When the locking device is in the locked state, the end of the locking rod (5) is vertically inserted into the guide frame (3) under the action of external force. The piston rod of the cylinder (2) extends outward and drives the locking pin (6) to pass through the through hole (31) of the guide frame (3) and enter the insertion hole (51) of the locking rod (5) laterally. The inclined surface of the locking pin (6) slides and fits against the inclined surface of the insertion hole (51) to adapt to different locking heights. When the locking device is in the unlocked state, the piston rod of the cylinder (2) retracts inward and drives the locking pin (6) to be pulled out from the insertion hole (51) of the locking rod (5) and retracted into the guide sleeve (1). The end of the locking rod (5) is pulled out from the guide frame (3) under the action of external force.

2. The novel molding machine mold locking device according to claim 1, characterized in that: The top surface of the guide frame (3) is horizontally provided with a floating component (4); The floating component (4) includes a fixed frame (41) horizontally fixed to the top surface of the guide frame (3). A matching slide plate (42) is horizontally placed inside the fixed frame (41). The bottom surface of the slide plate (42) is slidably attached to the top surface of the guide frame (3). A circular guide hole (421) is vertically opened through the slide plate (42). The guide hole (421) is located directly above the top opening of the guide frame (3) and the inner diameter of the guide hole (421) is the same as the inner width of the guide frame (3). Two sets of opposite sides of the fixed frame (41) are symmetrically fitted with spring plungers (43) at vertical intervals. The inner end of the spring plunger (43) is elastically connected to the corresponding side of the slide plate (42).

3. A novel molding machine mold locking device according to claim 2, characterized in that: An inlet angle (422) is provided circumferentially at the top opening of the guide hole (421).

4. A novel molding machine mold locking device according to claim 3, characterized in that: The guide frame (3) is a cubic structure.

5. A novel molding machine mold locking device according to claim 1, characterized in that: The guide frame (3) has observation holes (32) that are vertically and symmetrically arranged through the front and back.

6. A novel molding machine mold locking device according to claim 1, characterized in that: The through hole (31) is circular, and the size of the through hole (31) is adapted to the longitudinal cross-sectional size of the locking pin (6).

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