Anti-deformation plastic mold

Abstract

The application relates to the technical field of plastic molds, and discloses a plastic mold capable of preventing deformation, which comprises a lower mold and an upper mold, the surface of the lower mold is provided with a mold cavity, the inner bottom wall of the mold cavity is provided with a countersunk hole, and the inside of the countersunk hole is provided with a demolding assembly. The plastic mold capable of preventing deformation is provided with vibration sheets and vibration columns in the demolding head, high-frequency vibration is generated by combining a motor and an eccentric wheel, vibration force is directly transmitted to the bottom of a product, the product after forming is slightly separated from the inner wall of the mold cavity, the design effectively reduces frictional resistance during demolding, avoids demolding difficulty and product deformation caused by adhesion between the product and the mold cavity, significantly improves demolding smoothness and product qualification rate, and the setting of lifting columns can realize automatic pushing out of the workpiece, further improving the convenience of users.

Description

Technical Field

[0001] This application relates to the field of plastic mold technology, specifically to a plastic mold designed to prevent deformation. Background Technology

[0002] Plastic molds are key equipment used in industrial production for injection molding, and their performance directly affects the quality of injection molded products and production efficiency.

[0003] An existing patent (publication number: CN221365584U) discloses a plastic mold for preventing mold deformation. The lower end of the upper mold plate is fitted to the upper end of the lower mold plate, and an upper mold blank is installed in the inner cavity of the upper mold plate. The inner cavity of the lower mold plate has a lower mold blank and a slider. The lower part of the upper mold blank is fitted to the upper part of the lower mold blank. Slider blocks are provided on the sides of the upper and lower mold blanks. The middle part of the upper mold blank near the lower mold blank is recessed inward, and an upper flow channel and an upper mold groove are provided in the recessed part of the upper mold blank. The middle part of the lower mold blank near the upper mold blank is also recessed inward. The beneficial effects of this invention are: By adding upper groove ears on the left and right sides of the lower and upper mold grooves, the deformation of the lower and upper mold grooves is increased in advance. During manufacturing and production, the groove ears can absorb the effects of thermal expansion and contraction of the product, effectively solving the problem of product detachment, thereby improving product production quality and efficiency.

[0004] The aforementioned plastic mold adds upper groove ears on both sides of the lower mold groove and the upper mold groove. By increasing the deformation of the lower mold groove and the upper mold groove in advance through the groove ears, the groove ears can absorb the effects of thermal expansion and contraction of the product during manufacturing and production, effectively solving the problem of product falling off, thereby improving the production quality and efficiency of the product. However, although the groove ears can alleviate the problem of product falling off, traditional molds still require manual assistance for demolding after injection molding. Especially for complex structures or high viscosity materials, the demolding process can easily lead to product deformation or damage. Secondly, common molds usually use manual spraying of release agent, which has problems such as uneven spraying range and blind spots, resulting in uneven distribution of demolding resistance, further aggravating demolding difficulties and cavity wear. Utility Model Content

[0005] In view of the shortcomings of the prior art, this application provides a deformation-resistant plastic mold with advantages such as easy demolding, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a deformation-resistant plastic mold, comprising a lower mold and an upper mold, wherein a mold cavity is formed on the surface of the lower mold, a countersunk hole is formed on the inner bottom wall of the mold cavity, and a demolding component is provided inside the countersunk hole;

[0007] The demolding assembly includes a demolding head that is slidably inserted into a countersunk hole. The upper surface of the demolding head is at the same level as the inner bottom wall of the mold cavity. Multiple circumferentially arranged vibrating columns are fixedly embedded on the upper surface of the demolding head. Vibrating plates are provided on the inner top wall of the demolding head. The bottom end of each demolding head is fixedly connected to the upper surface of the vibrating plate. A motor is installed at the bottom of the vibrating plate, and an eccentric wheel is fixedly installed at the output end of the motor.

[0008] Below the demolding assembly is a release agent spraying assembly, which includes a lifting column with a cavity inside. The top of the lifting column is rotatably connected to a coaxially arranged spray pipe, and the top of the spray pipe is fixedly connected to a spray disc. A set of nozzles is fixedly connected to the outer surface of the spray disc.

[0009] Furthermore, a drive shaft is rotatably connected to the bottom end of the lifting column, and a bevel gear is fixedly connected to one end of the drive shaft and the bottom end of the spray pipe. The two bevel gears are meshed together, and one end of the drive shaft is fixedly connected to the output end of an external motor.

[0010] With the above solution, during the rising process of the lifting column, the motor drives the bevel gear to rotate, which in turn drives the spraying disc to rotate and spray, ensuring that the release agent fully covers the inner wall of the mold cavity, eliminating spray blind spots and reducing demolding friction.

[0011] Furthermore, a bidirectional screw is rotatably connected between the left and right inner sidewalls of the lower mold. Both ends of the bidirectional screw are threadedly connected to drive blocks. The top ends of the bottom of the two drive blocks are hinged to connecting rods, and the top ends of the two connecting rods are hinged to the bottom end of the lifting column.

[0012] The above scheme uses a bidirectional screw to drive two drive blocks to move in opposite directions, and the connecting rod converts the horizontal motion into the vertical lifting of the lifting column, thereby achieving automatic lifting control of the release agent spraying component.

[0013] Furthermore, four guide rods arranged in a matrix are fixedly connected to the upper surface of the upper mold, and the upper mold and the four guide rods are slidably connected up and down.

[0014] The above solution guides the upper mold to rise and fall vertically via guide rods, preventing mold closing misalignment, ensuring precise alignment of the upper and lower molds, and avoiding cavity deformation caused by misalignment.

[0015] Furthermore, an input pipe is fixedly connected to the outer surface of the lifting column, and a pump body is provided at one end of the input pipe, with the input end of the pump body fixedly connected to the input pipe.

[0016] The above scheme and settings enable automatic quantitative delivery of release agent, replacing manual spraying and improving spraying efficiency and uniformity.

[0017] Furthermore, a detection plate is fixedly connected to the bottom outer surface of the lifting column, and a slotted photoelectric switch is fixedly connected to the bottom of the lower mold.

[0018] The above method triggers a signal when the detection piece enters the slot of the slotted photoelectric switch, controlling the motor and pump to start running and achieving precise positioning.

[0019] Furthermore, one end of the bidirectional screw is fixedly connected to the external motor output end.

[0020] The above scheme enables the automatic rotation of the bidirectional screw, which drives the drive block to move and links the lifting column to rise and fall, thus completing the automated control of the release agent spraying component.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This type of anti-deformation plastic mold uses a vibrating plate and vibrating column inside the demolding head, combined with a motor-driven eccentric wheel to generate high-frequency vibration, which directly transmits the vibration force to the bottom of the product. This causes the product to separate slightly from the inner wall of the mold cavity after molding. This design effectively reduces the frictional resistance during demolding, avoids demolding difficulties and product deformation caused by the product sticking to the mold cavity, and significantly improves the smoothness of demolding and the product qualification rate. At the same time, the lifting column can automatically push out the workpiece, further improving the convenience for users.

[0023] The release agent spraying assembly uses a lifting column to rotate the spraying disc, and with the help of a bevel gear transmission structure, it achieves 360° rotational spraying during the lifting process. The evenly distributed nozzle design ensures complete coverage of the mold cavity wall by the release agent, eliminating blind spots in traditional manual spraying, further reducing demolding friction. At the same time, the pump automatically and quantitatively delivers the release agent, replacing manual operation and improving spraying efficiency and uniformity. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ;

[0025] Figure 2 This is a front view of the overall structure of this application;

[0026] Figure 3 This is a sectional view of the overall structure of this application from the front.

[0027] Figure 4 This is a structural diagram of the release assembly and release agent spraying assembly of this application;

[0028] Figure 5 For this application Figure 4 Mid-section view;

[0029] Figure 6This is a structural diagram of the mold used in this application.

[0030] In the picture:

[0031] 1. Lower mold; 101. Mold cavity; 102. Countersunk hole; 2. Upper mold;

[0032] 3. Demolding assembly; 301. Demolding head; 302. Vibrating column; 303. Vibrating plate; 304. Motor; 305. Eccentric wheel;

[0033] 4. Release agent spraying assembly; 401. Lifting column; 402. Spray pipe; 403. Spraying disc; 404. Nozzle;

[0034] 5. Drive shaft; 6. Bevel gear; 7. Double-acting screw; 8. Drive block; 9. Connecting rod; 10. Guide rod; 11. Input pipe; 12. Pump body; 13. Detection plate; 14. Slotted photoelectric switch. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Please see Figures 1-6 In this embodiment, a deformation-resistant plastic mold includes a lower mold 1 and an upper mold 2. The surface of the lower mold 1 is provided with a mold cavity 101, and the inner bottom wall of the mold cavity 101 is provided with a countersunk hole 102. A demolding component 3 is provided inside the countersunk hole 102.

[0037] The demolding assembly 3 includes a demolding head 301, which is slidably inserted into the countersunk hole 102. The upper surface of the demolding head 301 is at the same level as the inner bottom wall of the mold cavity 101. Multiple circumferentially arranged vibrating columns 302 are fixedly embedded on the upper surface of the demolding head 301. A vibrating plate 303 is provided on the inner top wall of the demolding head 301. The bottom end of each demolding head 301 is fixedly connected to the upper surface of the vibrating plate 303. A motor 304 is installed at the bottom of the vibrating plate 303. An eccentric wheel 305 is fixedly installed at the output end of the motor 304. Through the above arrangement, the motor 304 drives the eccentric wheel 305 to rotate and generate centrifugal force, which drives the vibrating plate 303 and the vibrating column 302 to vibrate at high frequency. The vibration force is transmitted to the bottom of the product, causing the product to separate slightly from the inner wall of the mold cavity 101, reducing the demolding friction resistance and preventing the product from deforming due to adhesion after molding.

[0038] Below the demolding assembly 3, a demolding agent spraying assembly 4 is provided. The demolding agent spraying assembly 4 includes a lifting column 401, which has a cavity inside. The top of the lifting column 401 is rotatably connected to a coaxially arranged spraying pipe 402. The top of the spraying pipe 402 is fixedly connected to a spraying disc 403. A set of nozzles 404 are fixedly connected to the outer surface of the spraying disc 403. When the lifting column 401 rises, the spraying disc 403 can spray demolding agent onto the inner wall of the mold cavity 101, achieving uniform coverage through rotational spraying.

[0039] A drive shaft 5 is rotatably connected to the bottom end of the lifting column 401. A bevel gear 6 is fixedly connected to one end of the drive shaft 5 and the bottom end of the spray pipe 402. The two bevel gears 6 mesh with each other. One end of the drive shaft 5 is fixedly connected to the output end of an external motor. During the ascent of the lifting column 401, the motor drives the bevel gear 6 to rotate, which in turn drives the spray disc 403 to rotate and spray, ensuring that the release agent fully covers the inner wall of the mold cavity 101, eliminating spray blind spots and reducing demolding friction. A bidirectional screw 7 is rotatably connected between the left and right inner walls of the lower mold 1. Both ends of the bidirectional screw 7 are threaded... The device is connected to a drive block 8, and the top of each of the two drive blocks 8 is hinged to a connecting rod 9. The top of each connecting rod 9 is hinged to the bottom of the lifting column 401. The two drive blocks 8 are driven to move in opposite directions by the rotation of the bidirectional screw 7. The connecting rod 9 converts the horizontal movement into the vertical lifting of the lifting column 401, thereby realizing the automatic lifting control of the release agent spraying component 4. One end of the bidirectional screw is fixedly connected to the output end of the external motor 304. Through the above settings, the bidirectional screw 7 is automatically rotated, driving the drive block 8 to move and linking the lifting column 401 to lift, thus completing the automatic control of the release agent spraying component 4.

[0040] Four guide rods 10 arranged in a matrix are fixedly connected to the upper surface of the upper mold 2. The upper mold 2 and the four guide rods 10 are slidably connected vertically. The guide rods 10 guide the upper mold 2 to rise and fall vertically, preventing mold closing misalignment and ensuring precise alignment of the upper and lower molds to avoid cavity deformation caused by misalignment. An input pipe 11 is fixedly connected to the outer surface of the lifting column 401. A pump body 12 is provided at one end of the input pipe 11. The input end of the pump body 12 is fixedly connected to the input pipe 11, and the output end of the pump body 12 is connected to an external mold release agent storage container. The output end of the pump body 12 is connected to an external mold release agent storage container. Through the above settings, the mold release agent is automatically and quantitatively delivered, replacing manual spraying and improving spraying efficiency and uniformity. A detection plate 13 is fixedly connected to the bottom outer surface of the lifting column 401, and a slotted photoelectric switch 14 is fixedly connected to the bottom of the lower mold 1. The lifting position of the lifting column 401 is detected through the above settings. When the detection plate 13 enters the slot of the slotted photoelectric switch 14, a signal is triggered to control the motor and pump body 12 to start running, thereby achieving precise positioning.

[0041] The working principle of the above embodiment is as follows: the upper mold 2 slides down vertically along the four matrix-arranged guide rods 10 and is precisely aligned with the mold cavity 101 of the lower mold 1. The guide rod 10 guides the mold closing and prevents misalignment, ensuring complete fit between the upper and lower mold cavities and preventing cavity deformation due to misalignment. Molten plastic is injected into the mold cavity 101 and cools to form the product. At this time, the bottom of the product is in contact with the inner wall of the mold cavity 101, and the side walls may slightly adhere to the inner wall of the mold cavity 101 due to thermal expansion and contraction. An external motor 304 drives the bidirectional screw 7 to rotate, which in turn drives two drive blocks 8 to move towards each other. The drive blocks 8 convert the horizontal movement into the vertical upward movement of the lifting column 401 through the connecting rod 9. At the same time, the motor 304 at the bottom of the demolding head 301 drives the eccentric wheel 305 to rotate at high speed, generating centrifugal force, which drives the vibrating plate 303 and multiple vibrating columns 302 fixed on the upper surface of the demolding head 301 to vibrate at high frequency. The vibration is directly transmitted to the bottom of the product through the demolding head 301, causing the product to slightly separate from the inner wall of the mold cavity 101, further reducing adhesion and preventing adhesion during demolding. Due to product deformation or damage caused by pulling, during the ascent of the lifting column 401, the detection plate 13 at its bottom end enters the slot of the slotted photoelectric switch 14 fixed at the bottom of the lower mold 1, triggering a signal to control the motor and pump body 12 to start running. The pump body 12 delivers the release agent quantitatively to the cavity of the lifting column 401 through the input pipe 11. The release agent enters the spraying disc 403 through the spraying pipe 402. The external motor drives the transmission shaft 5 to rotate. The bevel gear 6 at the end of the transmission shaft 5 meshes with the bevel gear 6 at the bottom of the spraying pipe 402, driving the spraying disc 403 to rotate 360°. A set of nozzles 404 on the outer surface of the spraying disc 403 evenly sprays the release agent, covering the entire area of ​​the inner wall of the mold cavity 101, eliminating blind spots of manual spraying, and reducing demolding friction. After demolding is completed, the bidirectional screw 7 reverses, the drive block 8 moves in the opposite direction, and the connecting rod 9 drives the lifting column 401 to descend vertically to the initial position, waiting for the next spraying cycle.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deformation-resistant plastic mold, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) has a mold cavity (101) on its surface, and a countersunk hole (102) is provided in the inner bottom wall of the mold cavity (101). A demolding component (3) is provided inside the countersunk hole (102). The demolding assembly (3) includes a demolding head (301), which is slidably inserted into a countersunk hole (102). The upper surface of the demolding head (301) is at the same level as the inner bottom wall of the mold cavity (101). Multiple circumferentially arranged vibrating columns (302) are fixedly embedded on the upper surface of the demolding head (301). A vibrating plate (303) is provided on the inner top wall of the demolding head (301). The bottom end of each demolding head (301) is fixedly connected to the upper surface of the vibrating plate (303). A motor (304) is installed at the bottom of the vibrating plate (303). An eccentric wheel (305) is fixedly installed at the output end of the motor (304). Below the demolding assembly (3) is a demolding agent spraying assembly (4). The demolding agent spraying assembly (4) includes a lifting column (401). The lifting column (401) has a cavity inside. The top of the lifting column (401) is rotatably connected to a coaxially arranged spraying pipe (402). The top of the spraying pipe (402) is fixedly connected to a spraying disc (403). A set of nozzles (404) is fixedly connected to the outer surface of the spraying disc (403).

2. The anti-deformation plastic mold according to claim 1, characterized in that: The bottom end of the lifting column (401) is rotatably connected to a drive shaft (5). One end of the drive shaft (5) and the bottom end of the spray pipe (402) are both fixedly connected to bevel gears (6). The two bevel gears (6) are meshed together. One end of the drive shaft (5) is fixedly connected to the output end of the external motor.

3. The anti-deformation plastic mold according to claim 1, characterized in that: A bidirectional screw (7) is rotatably connected between the left and right inner walls of the lower mold (1). Both ends of the bidirectional screw (7) are threadedly connected to drive blocks (8). The top ends of the bottom ends of the two drive blocks (8) are hinged to connecting rods (9). The top ends of the two connecting rods (9) are hinged to the bottom end of the lifting column (401).

4. The anti-deformation plastic mold according to claim 1, characterized in that: The upper surface of the upper mold (2) is fixedly connected with four guide rods (10) arranged in a matrix, and the upper mold (2) and the four guide rods (10) are slidably connected up and down.

5. The anti-deformation plastic mold according to claim 1, characterized in that: The outer surface of the lifting column (401) is fixedly connected to an input pipe (11), and a pump body (12) is provided at one end of the input pipe (11). The input end of the pump body (12) is fixedly connected to the input pipe (11).

6. The anti-deformation plastic mold according to claim 1, characterized in that: The bottom outer surface of the lifting column (401) is fixedly connected to a detection plate (13), and the bottom of the lower mold (1) is fixedly connected to a slotted photoelectric switch (14).

7. The anti-deformation plastic mold according to claim 3, characterized in that: One end of the bidirectional screw (7) is fixedly connected to the output end of an external motor (304).

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