Printer part injection mold convenient for rapid demolding

Abstract

The printer part injection mold comprises an upper mold body and a lower mold body which are matched with each other to form a mold cavity, a mold release agent spraying mechanism is arranged on one side of the upper mold body and one side of the lower mold body, and the mold release agent spraying mechanism comprises a fluid pump and a hollow shaft connected with an outlet of the fluid pump; the hollow rotating shaft is rotatably arranged in the hollow shaft, the hollow column is rotatably arranged at the tail end of the hollow rotating shaft, the driving mechanism is used for moving the hollow column to the position between the upper die and the lower die, a plurality of twistable positioning pipes are arranged on the outer wall of the hollow column, and nozzles are arranged at the ends of the twistable positioning pipes. And the twistable positioning pipe is communicated with the hollow rotating shaft. The printer part injection mold convenient to quickly demold can automatically and quickly finish spraying of a release agent, is suitable for various different molds, improves the efficiency, ensures the spraying consistency and improves the safety of workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to a printer part injection mold facilitating rapid demolding. BACKGROUND

[0002] In the manufacturing of printer parts, injection molding is a highly efficient and economical common process for producing plastic components. As the core equipment of this process, the smoothness and reliability of the demolding process of the injection mold directly affect the molding quality, production efficiency and mold life of the parts.

[0003] Currently, a common problem exists in the practical application of the commonly seen injection mold for printer parts on the market: due to the complex structure of the parts, often containing features such as deep cavities, narrow grooves, reinforcing ribs or tiny reverse buckles, after the molten plastic is injected and cooled to form, the parts are prone to adhere to the surface of the mold cavity in some areas, especially around the core, the contact surface of the ejector pin or the complex texture. This adhesion will cause the opening resistance to increase, and may cause the parts to be pulled, deformed or even broken during forced demolding, and may also damage the precision surface of the mold itself, affecting the dimensional accuracy and appearance quality of the subsequent products.

[0004] To solve the above demolding difficulty, the commonly used solution in the prior art is that after opening the mold for each injection cycle, the operator manually identifies and applies demolding agent (such as spray cans or brush coating) to the specific adhesion-prone areas of the mold cavity. After the demolding agent volatilizes or forms an isolation film, the mold is closed and the next injection is performed. However, this method has the following significant defects: 1. Low efficiency, affecting production rhythm: manual application of demolding agent consumes additional time, interrupts the continuous automatic operation rhythm of the injection molding machine, significantly reduces the overall production efficiency, and is difficult to meet the production demands of large quantities and fast pace.

[0005] 2. Uneven coverage, poor quality stability: manual operation has subjective and fatigue factors, which can lead to uneven application of demolding agent, different thicknesses, and even missed application in critical areas. This can make the demolding effect unstable, sometimes smooth and sometimes adhered, increase the product failure rate, and make it difficult to ensure the quality consistency.

[0006] 3. Safety and health hazards: injection molds are usually in a high-temperature state, and the closing area is a high-risk operation area. Frequent close-range manual application by operators poses occupational safety risks such as burns and mechanical injuries. At the same time, many demolding agents themselves contain volatile chemicals, and long-term exposure can pose potential health risks to operators.

[0007] Therefore, the current demolding assistance method, which relies on manual application of release agents, has become a bottleneck restricting the efficiency, automation level, and operational safety of injection molding production of precision parts such as printers. The industry urgently needs a rapid demolding technology or mold structure improvement solution that can be integrated into the mold or injection process, requiring no frequent manual intervention, and automatically, uniformly, and precisely applied to easily sticking areas to achieve stable, efficient, and safe continuous production. Summary of the Invention

[0008] This invention addresses the shortcomings of existing technologies by providing a printer parts injection mold that facilitates rapid demolding. This printer parts injection mold can automatically and quickly complete the spraying of release agent after demolding, thereby improving efficiency, ensuring spraying consistency, and enhancing worker safety.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a printer part injection mold for easy and rapid demolding, comprising an upper mold and a lower mold that cooperate to form a cavity, wherein a mold release agent spraying mechanism is provided on one side of the upper mold and the lower mold, the mold release agent spraying mechanism comprising a fluid pump, a hollow shaft connected to the outlet of the fluid pump, a hollow rotating shaft rotatably disposed within the hollow shaft, a hollow column rotatably disposed at the tail end of the hollow rotating shaft, and a drive mechanism for moving the hollow column between the upper mold and the lower mold, wherein a plurality of twistable positioning tubes are provided on the outer wall of the hollow column, and a nozzle is provided at the end of the twistable positioning tube, the twistable positioning tube being connected to the hollow rotating shaft. This printer parts injection mold, designed for rapid demolding, operates by moving a hollow column between the upper and lower molds via a drive mechanism after the product is removed from the mold. A fluid pump then pumps release agent from the nozzles along the hollow shaft, hollow rotating shaft, internal channels of the hollow column, and a twistable positioning tube to the desired locations on both molds. After spraying, the drive mechanism removes the hollow column, automatically and quickly completing the release agent application. This process improves efficiency, ensures consistent application, and enhances worker safety. Before use, with the hollow column positioned between the upper and lower molds, the twistable positioning tube needs to be adjusted to align the nozzles with the desired release agent locations. This adjustment via the twistable positioning tube allows the release agent application mechanism to be adapted to various mold types.

[0010] In the above technical solution, preferably, the injection mold further includes a rotary drive assembly for driving the hollow column to rotate around its axis. The hollow column has a guide hole on its side wall, and a movable tube frame is provided inside the hollow column. The movable tube frame is connected to the hollow rotating shaft through a flexible hose. A plurality of guide tubes are provided on the movable tube frame, and the guide tubes pass through the guide hole. The outer end of the guide tube is connected to the torsionable positioning tube. A first gear is rotatably provided inside the hollow column, and a rack that meshes with the first gear is provided on the movable tube frame. The first gear is connected to a gear drive assembly, and the rotation of the first gear drives the guide tube to move in the guide hole. Since the spraying positions on the upper and lower molds may be recessed at the joint surfaces, directly setting the nozzle position would result in a large distance between the nozzle and the spraying position or difficulty in matching the spraying angle. To optimize the spraying effect, it would be best to extend the nozzle into the cavity. However, extending the nozzle into the cavity would interfere with the movement of the hollow column. Therefore, the above-mentioned technical solution is used to solve this problem. During the movement of the hollow column, the guide hole is located in the horizontal direction. When the hollow column moves between the upper and lower molds, the hollow column is driven to rotate by the rotary drive assembly, so that the guide hole is located in the vertical direction. The gear drive assembly drives the first gear to rotate relative to the hollow column, which can move the guide tube to the outside of the hollow column, thereby allowing the nozzle to extend into the cavity. Then, the fluid pump is started to accurately spray. After the spraying is completed, the gear drive assembly first drives the guide tube to move to the inside of the hollow column and returns the guide hole to the horizontal direction. Then, the drive mechanism moves the hollow column out, thereby improving the spraying effect and avoiding interference.

[0011] In the above technical solution, preferably, the rotary drive assembly includes a second gear driven by a first motor and a third gear fixed to the hollow rotary shaft, wherein the second gear meshes with the third gear. The first motor drives the second gear to rotate, causing the third gear meshing with the second gear to rotate, thereby driving the hollow rotary shaft and hollow column to rotate as a whole.

[0012] In the above technical solution, preferably, a turntable is fixedly mounted on the output shaft of the first motor, the turntable has a recessed portion, a support frame is mounted on one side of the turntable, a tactile switch connected in series with the power supply circuit of the fluid pump is mounted on the support frame, a push rod is passed through the support frame, the push rod is elastically supported between the tactile switch and the turntable by a spring, one end of the push rod abuts against the outer periphery of the turntable, and the other end of the push rod is aligned with the tactile switch, when the push rod is aligned with the recessed portion, the tactile switch is de-energized. With this structure, during the rotation of the second gear driven by the first motor, when the guide hole is in the horizontal direction, one end of the push rod synchronously abuts against the recess of the turntable. The push rod does not contact the tactile switch, so the tactile switch is de-energized and the fluid pump does not work. When the guide hole rotates to the vertical direction, one end of the push rod synchronously leaves the recess of the turntable, and the push rod presses against the tactile switch. The tactile switch is energized, causing the fluid pump to work. This structure can indirectly control the working state of the fluid pump through the rotation of the first motor, and make the working state of the fluid pump match the rotation angle of the hollow column.

[0013] In the above technical solution, preferably, the gear drive assembly includes a gear shaft that rotatably passes through the end of the hollow column. The gear shaft is fixedly connected to the first gear. A non-circular limiting block is provided at one end of the gear shaft located outside the hollow column. The gear drive assembly also includes a mating block. The mating block is provided with a limiting groove that has a lateral opening and matches the non-circular limiting block. When the hollow column moves between the upper mold and the lower mold, the non-circular limiting block is embedded in the limiting groove. As the hollow column rotates, the guide hole rotates from the horizontal to the vertical direction. The first gear rotates relative to the hollow column, driving the movement on the movable tube frame to move the guide tube towards the outside of the hollow column. This structure allows the non-circular limiting block to engage with and disengage from the limiting groove of the mating block when the hollow column moves between the upper and lower molds. Furthermore, when the rotary drive assembly rotates the hollow column, the limiting groove restricts the rotation of the first gear. The first gear rotates relative to the hollow column, thereby causing the guide tube to move outward from the hollow column during the rotation of the guide hole from the horizontal to the vertical direction, and to move inward from the hollow column during the rotation of the guide hole from the vertical to the horizontal direction.

[0014] In the above technical solution, preferably, the mating block is connected to the output shaft of the second motor. This structure allows the rotation of the mating block driven by the second motor to further increase the travel of the guide tube, making it suitable for use in molds with deeper cavities.

[0015] In the above technical solution, preferably, a positioning ring is provided at the tail end of the hollow rotating shaft, and an extension arm is provided at one end of the hollow column, located on both sides of the positioning ring. A rotating shaft passing through the positioning ring is connected between the extension arms, and a flow channel is provided between the extension arms and the rotating shaft. The outlet of the flow channel is connected to the torsionible positioning tube, the inlet of the flow channel is located on the outer wall of the rotating shaft, and a liquid outlet is provided on the inner wall of the positioning ring, communicating with the hollow shaft. When the hollow column moves between the upper mold and the lower mold, the inlet of the flow channel connects with the liquid outlet. The hollow column can swing by rotating the rotating shaft within the positioning ring, and when the hollow column is not between the upper mold and the lower mold, the inlet of the flow channel is disconnected from the liquid outlet.

[0016] In the above technical solution, preferably, the driving mechanism includes a movable sleeve sleeved on the hollow rotating shaft and movable along its axial direction. A connecting arm with hinged ends is provided between the movable sleeve and the hollow column. The side of the connecting arm connected to the hollow column is offset from the rotation center of the rotating shaft. The driving mechanism also includes a driving structure for driving the movable sleeve to move, thereby causing the hollow column to swing. This structure allows the movable sleeve to move via the driving structure, realizing the swinging of the hollow column without affecting its rotation.

[0017] In the above technical solution, preferably, the driving structure includes a fixedly mounted electromagnet and a fixedly mounted permanent magnet on the movable sleeve. Changing the energizing direction of the electromagnet drives the movable sleeve to reciprocate on the hollow rotating shaft. This structure allows the reciprocating movement of the movable sleeve on the hollow rotating shaft to be achieved by changing the energizing direction of the electromagnet, thereby causing the hollow column to swing, enabling the hollow column to move between or away from the upper and lower dies without affecting the rotation of the hollow column.

[0018] In the above technical solution, preferably, the driving structure includes a fixedly mounted linear actuator and a fixedly mounted linkage block on the movable sleeve. The linear actuator has a lever on its telescopic rod, and the linkage block has an annular groove, with the lever located within the annular groove. This structure allows the movable sleeve to reciprocate on the hollow rotating shaft via the telescopic movement of the linear actuator, thereby driving the hollow column to swing and move it between or away from the upper and lower dies without affecting the rotation of the hollow column.

[0019] Compared with existing technologies, this invention has the following advantages: When using this printer part injection mold that facilitates rapid demolding, after the product is removed from the mold, a drive mechanism moves the hollow column between the upper and lower molds. Then, a fluid pump is activated, spraying the release agent from the nozzles along the hollow shaft, hollow rotating shaft, internal channels of the hollow column, and the twistable positioning tube to the desired locations on the upper and lower molds. After spraying, the drive mechanism removes the hollow column, automatically and quickly completing the release agent application, thereby improving efficiency, ensuring spraying consistency, and enhancing worker safety. Before use, with the hollow column positioned between the upper and lower molds, the twisting shape of the twistable positioning tube needs to be adjusted to align each nozzle with the desired release agent location on the upper and lower molds. This adjustment of the nozzle alignment via the twistable positioning tube allows the release agent spraying mechanism to be adapted to various molds. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0021] Figure 2 This is a partial structural diagram of an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram showing the exploded structure inside the hollow column in an embodiment of the present invention.

[0023] Figure 4 This is a cross-sectional view of the guide hole of the hollow column in an embodiment of the present invention when viewed laterally.

[0024] Figure 5 This is a schematic cross-sectional view of the guide hole of the hollow column in the longitudinal direction in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of one embodiment of the driving structure in this invention.

[0026] Figure 7 This is a schematic diagram of another embodiment of the driving structure in this invention.

[0027] Figure 8 This is a partial structural diagram of the fluid pump control section in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the hollow rotating shaft in an embodiment of the present invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1 to 9A printer part injection mold for easy and quick demolding includes an upper mold 1 and a lower mold 2 that cooperate to form a cavity. The lower mold 2 is fixed on a base 100, and a gantry 200 is fixed on the base 100. The upper mold 1, driven to rise and fall by a linear cylinder 300, is slidably mounted on the gantry 200. A support frame 10 is provided on the base 100. A mold release agent spraying mechanism is provided on one side of the upper mold 1 and the lower mold 2. The mold release agent spraying mechanism includes a fluid pump 3, a hollow shaft 4 connected to the outlet of the fluid pump 3, a hollow rotating shaft 5 rotatably mounted inside the hollow shaft 4, and a hollow rotating shaft 5 rotatably mounted inside the hollow shaft 4. The rotating shaft 5 has a hollow column 6 at its tail end, and a drive mechanism that moves the hollow column 6 between the upper mold 1 and the lower mold 2. The inlet of the fluid pump 3 is connected to a release agent tank (not shown in the figure). Several twistable positioning tubes 7 are provided on the outer wall of the hollow column 6. The ends of the twistable positioning tubes 7 are provided with nozzles 8. The twistable positioning tubes 7 are connected to the hollow rotating shaft 5. The structure of the twistable positioning tubes 7 is existing technology, similar to existing twistable faucets. It includes at least an internal hose and an external support frame layer. The support frame layer is composed of multiple interlocking stainless steel rings. When bent by force, these stainless steel rings can produce small angular changes. The accumulation of numerous small changes of stainless steel rings forms a large-amplitude, smooth bend. Due to the large friction between the rings and the design of the interlocking structure, they can lock in their current position after the external force is removed, resisting the impact of water flow and their own weight, thereby maintaining their shape. This type of printer part injection mold, which facilitates rapid demolding, operates by moving the hollow column 6 between the upper mold 1 and the lower mold 2 via a drive mechanism after the product is removed from the mold. Then, the fluid pump 3 is activated, spraying the release agent from the nozzles 8 along the hollow shaft 4, hollow rotating shaft 5, internal channels of the hollow column 6, and the twistable positioning tube 7 to the desired locations on both molds. After spraying, the drive mechanism removes the hollow column 6, automatically and quickly completing the release agent application. This improves efficiency, ensures consistent application, and enhances worker safety. Before use, with the hollow column 6 positioned between the upper mold 1 and the lower mold 2, the twisted shape of the twistable positioning tube 7 should be adjusted to align the nozzles 8 with the desired release agent locations on both molds. This adjustment of the nozzle 8 position via the twistable positioning tube allows the release agent spraying mechanism to be adapted to various mold types.

[0030] In this embodiment, the injection mold further includes a rotary drive assembly for driving the hollow column 6 to rotate around its axis. The hollow column 6 has a guide hole 9 on its side wall and a movable tube frame 11 inside the hollow column 6. The movable tube frame 11 is connected to the hollow rotating shaft 5 through a flexible tube. Several guide tubes 12 are provided on the movable tube frame 11. The guide tubes 12 pass through the guide hole 9 and the outer end of the guide tube 12 is connected to a torsionable positioning tube 7. A first gear 13 is rotatably provided inside the hollow column 6. A rack 14 that meshes with the first gear 13 is provided on the movable tube frame 11. The first gear 13 is connected to a gear drive assembly. The first gear 13 rotates to drive the guide tubes 12 to move in the guide hole 9. Since the spraying positions on the upper mold 1 and lower mold 2 may be recessed at the joint surfaces of the upper mold 1 and lower mold 2, directly setting the position of the nozzle 8 would result in a large distance between the nozzle 8 and the spraying position or difficulty in matching the spraying angle. To optimize the spraying effect, it would be best to extend the nozzle 8 into the cavity. However, extending the nozzle 8 into the cavity would interfere with the movement of the hollow column 6. Therefore, the above-mentioned technical solution is used to solve this problem. During the movement of the hollow column 6, the guide hole 9 is located in the lateral direction. When the hollow column 6 moves between the upper mold 1 and lower mold 2, the guide hole 9 is located in the lateral direction. The rotary drive assembly drives the hollow column 6 to rotate, so that the guide hole 9 is in the vertical direction. The gear drive assembly drives the first gear 13 to rotate relative to the hollow column 6, which can move the guide tube 12 to the outside of the hollow column 6, so that the nozzle 8 can be inserted into the cavity. Then the fluid pump 3 is started to accurately spray. After the spraying is completed, the gear drive assembly first drives the guide tube 12 to move to the inside of the hollow column 6 and returns the guide hole 9 to the horizontal direction. Then the drive mechanism moves the hollow column 6 out, thereby improving the spraying effect and avoiding interference.

[0031] In this embodiment, the rotary drive assembly includes a second gear 16 driven by a first motor 15 and a third gear 17 fixed on the hollow rotary shaft 5. The second gear 16 and the third gear 17 mesh. In this embodiment, both the second gear 16 and the third gear 17 are helical gears. The first motor 15 drives the second gear 16 to rotate, causing the third gear 17 meshing with the second gear 16 to rotate, thereby driving the hollow rotary shaft 5 and the hollow column 6 to rotate as a whole.

[0032] In this embodiment, a turntable 18 is fixedly mounted on the output shaft of the first motor 15. A recess 19 is provided on the turntable 18. A support frame 10 is provided on one side of the turntable 18. A tactile switch 20 connected in series with the power supply circuit of the fluid pump 3 is provided on the support frame 10. A push rod 21 is passed through the support frame 10. The push rod 21 is elastically supported between the tactile switch 20 and the turntable 18 by a spring 22. One end of the push rod 21 abuts against the outer periphery of the turntable 18, and the other end of the push rod 21 is aligned with the tactile switch 20. When the push rod 21 is aligned with the recess 19, the tactile switch 20 is de-energized. With this structure, during the rotation of the second gear 16 driven by the first motor 15, when the guide hole 9 is in the horizontal direction, one end of the push rod 21 synchronously abuts against the recess 19 of the turntable 18. The push rod 21 does not contact the tactile switch 20. At this time, the tactile switch 20 is de-energized, and the fluid pump 3 does not work. When the guide hole 9 rotates to the vertical direction, one end of the push rod 21 synchronously leaves the recess 19 of the turntable 18. The push rod 21 presses against the tactile switch 20, and the tactile switch 20 is energized, causing the fluid pump 3 to work. With this structure, the working state of the fluid pump 3 can be indirectly controlled through the rotation of the first motor 15, and the working state of the fluid pump 3 can be matched with the rotation angle of the hollow column 6.

[0033] In this embodiment, the gear drive assembly includes a gear shaft 23 that rotatably passes through the end of the hollow column 6. The gear shaft 23 is fixedly connected to the first gear 13. A non-circular limiting block 24 is provided at one end of the gear shaft 23 located outside the hollow column 6. The gear drive assembly also includes a mating block 25. The mating block 25 is provided with a limiting groove 26 that has a lateral opening and matches the non-circular limiting block 24. When the hollow column 6 moves between the upper mold 1 and the lower mold 2, the non-circular limiting block 24 is embedded in the limiting groove 26. As the hollow column 6 rotates, the guide hole 9 rotates from the horizontal to the vertical direction. The first gear 13 rotates relative to the hollow column 6, driving the movement on the movable tube frame 11 to move the guide tube 12 towards the outside of the hollow column 6. This structure allows the non-circular limiting block 24 to engage with and disengage from the limiting groove 26 of the mating block 25 when the hollow column 6 moves between the upper mold 1 and the lower mold 2. When the rotary drive assembly drives the hollow column 6 to rotate, the limiting groove 26 restricts the rotation of the first gear 13. The first gear 13 rotates relative to the hollow column 6, thereby causing the guide tube 12 to move outward from the hollow column 6 during the process of the guide hole 9 rotating from the horizontal to the vertical direction, and the guide tube 12 to move inward from the hollow column 6 during the process of the guide hole 9 rotating from the vertical to the horizontal direction.

[0034] In this embodiment, the mating block 25 is connected to the output shaft of the second motor 27, which is fixedly mounted on the gantry frame 200. This structure allows the rotation of the mating block 25 driven by the second motor 27 to further increase the travel of the guide tube 12, making it suitable for use in molds with deeper cavities.

[0035] In this embodiment, a positioning ring 28 is provided at the tail end of the hollow rotating shaft 5, and an extension arm 29 is provided at one end of the hollow column 6 on both sides of the positioning ring 28. A rotating shaft passing through the positioning ring 28 is connected between the extension arms 29, and a flow channel 31 is provided between the extension arms 29 and the rotating shaft. The outlet of the flow channel 31 is connected to the torsionible positioning tube 7, and the inlet of the flow channel 31 is located on the outer wall of the rotating shaft. An outlet 32 ​​communicating with the hollow shaft 4 is provided on the inner wall of the positioning ring 28. When the hollow column 6 moves between the upper mold 1 and the lower mold 2, the inlet of the flow channel 31 is connected to the outlet 32. The hollow column 6 can swing by rotating within the positioning ring 28 through the rotating shaft, and when the hollow column 6 is not between the upper mold 1 and the lower mold 2, the inlet of the flow channel 31 is disconnected from the outlet 32.

[0036] In this embodiment, the driving mechanism includes a movable sleeve 33 that is sleeved on the hollow rotating shaft 5 and can move along its axial direction. The outer wall of the hollow rotating shaft 5 has an axial protrusion, and the inner wall of the movable sleeve 33 has a groove that matches the axial protrusion. The groove and the axial protrusion cooperate to restrict the rotation of the movable sleeve 33 relative to the hollow rotating shaft 5. A connecting arm 34 with hinged ends is provided between the movable sleeve 33 and the hollow column 6. The side of the connecting arm 34 connected to the hollow column 6 is offset from the rotation center of the rotating shaft. The driving mechanism also includes a driving structure for driving the movable sleeve 33 to move, thereby causing the hollow column 6 to swing. This structure enables the movable sleeve 33 to move through the driving structure, realizing the swinging of the hollow column 6 without affecting the rotation of the hollow column 6.

[0037] See Figure 6 This embodiment describes a driving structure that includes a fixedly mounted electromagnet 35 and a fixedly mounted permanent magnet 36 on a movable sleeve 33. Changing the energizing direction of the electromagnet 35 drives the movable sleeve 33 to reciprocate on the hollow rotating shaft 5. This structure allows the reciprocating movement of the movable sleeve 33 on the hollow rotating shaft 5 to be achieved by changing the energizing direction of the electromagnet 35, thereby causing the hollow column 6 to swing. This allows the hollow column 6 to move between or away from the upper mold 1 and lower mold 2 without affecting the rotation of the hollow column 6.

[0038] See Figure 7 Another driving structure applicable to this embodiment includes a fixedly mounted linear actuator 37 and a linkage block 38 fixedly mounted on the movable sleeve 33. A lever 39 is provided on the telescopic rod of the linear actuator 37, and an annular groove 40 is provided on the linkage block 38, with the lever 39 located within the annular groove 40. This structure enables the reciprocating movement of the movable sleeve 33 on the hollow rotating shaft 5 through the telescopic movement of the linear actuator 37, thereby driving the hollow column 6 to swing. This allows the hollow column 6 to move between or away from the upper mold 1 and lower mold 2 without affecting the rotation of the hollow column 6.

[0039] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A printer part injection mold facilitating quick mold release, comprising an upper mold (1) and a lower mold (2) cooperating to form a mold cavity, characterized in that: One side of the upper die (1) and the lower die (2) is provided with a release agent spraying mechanism, the release agent spraying mechanism comprises a fluid pump (3), a hollow shaft (4) connected with the outlet of the fluid pump (3), a hollow rotating shaft (5) rotatably arranged in the hollow shaft (4), a hollow column (6) rotatably arranged at the tail end of the hollow rotating shaft (5), and a driving mechanism for moving the hollow column (6) to between the upper die (1) and the lower die (2), the outer wall of the hollow column (6) is provided with a plurality of twistable positioning pipes (7), the end of the twistable positioning pipe (7) is provided with a spray head (8), and the twistable positioning pipe (7) is communicated with the hollow rotating shaft (5).

2. A printer part injection mold facilitating quick mold release as claimed in claim 1 wherein: The injection mold further comprises a rotating drive assembly for driving the hollow column (6) to rotate around its axis, the side wall of the hollow column (6) is provided with a guide hole (9), the hollow column (6) is provided with a movable pipe support (11) inside, the movable pipe support (11) is communicated with the hollow rotating shaft (5) through a hose, a plurality of guide pipes (12) are arranged on the movable pipe support (11), the guide pipes (12) are arranged in the guide hole (9), the outer end of the guide pipe (12) is connected with the twistable positioning pipe (7), a first gear (13) is rotatably arranged in the hollow column (6), a rack (14) engaged with the first gear (13) is arranged on the movable pipe support (11), the first gear (13) is connected with a gear drive assembly, and the first gear (13) rotates to drive the guide pipe (12) to move in the guide hole (9).

3. A printer part injection mold facilitating quick mold release as claimed in claim 2 wherein: The rotating drive assembly comprises a second gear (16) driven by a first motor (15), and a third gear (17) fixed on the hollow rotating shaft (5), and the second gear (16) is engaged with the third gear (17).

4. A printer part injection mold facilitating quick mold release as claimed in claim 3 wherein: A turntable (18) is fixedly arranged on the output shaft of the first motor (15), the turntable (18) is provided with a recess (19), one side of the turntable (18) is provided with a support frame (10), a touch switch (20) connected in series with the power supply circuit of the fluid pump (3) is arranged on the support frame (10), a jacking rod (21) is arranged on the support frame (10), the jacking rod (21) is elastically supported between the touch switch (20) and the turntable (18) through a spring (22), one end of the jacking rod (21) abuts against the outer circumference of the turntable (18), the other end of the jacking rod (21) is aligned with the touch switch (20), and when the jacking rod (21) is aligned with the recess (19), the touch switch (20) is de-energized.

5. A printer part injection mold facilitating quick mold release as defined in claim 2, wherein: The gear drive assembly comprises a gear shaft (23) axially rotating through the end of the hollow column (6), the gear shaft (23) is fixedly connected with the first gear (13), and one end of the gear shaft (23) located outside the hollow column (6) is provided with a non-circular limiting block (24); the gear drive assembly further comprises a matching block (25) provided with a limiting groove (26) with an opening on the lateral side and matching with the non-circular limiting block (24); when the hollow column (6) moves between the upper die (1) and the lower die (2), the non-circular limiting block (24) is embedded in the limiting groove (26); with the rotation of the hollow column (6), the guide hole (9) rotates from the transverse direction to the longitudinal direction, and the first gear (13) rotates relative to the hollow column (6) to drive the movement of the movable pipe frame (11) to move the guide pipe (12) to the outside of the hollow column (6).

6. A printer part injection mold facilitating quick mold release as claimed in claim 5 wherein: The matching block (25) is connected to the output shaft of the second motor (27).

7. A printer part injection mold facilitating quick mold release as claimed in claim 1 or 2 wherein: The tail end of the hollow rotating shaft (5) is provided with a positioning ring (28), one end of the hollow column (6) is provided with an extension arm (29) located on both sides of the positioning ring (28), the extension arm (29) is connected with a rotating shaft penetrating through the positioning ring (28), the extension arm (29) and the rotating shaft have a communication flow channel (31) therebetween, the outlet of the flow channel (31) communicates with the twistable positioning pipe (7), the inlet of the flow channel (31) is located on the outer wall of the rotating shaft, and the inner wall of the positioning ring (28) is provided with a liquid outlet (32) communicating with the hollow shaft (4); when the hollow column (6) moves between the upper die (1) and the lower die (2), the inlet of the flow channel (31) is connected with the liquid outlet (32).

8. A printer part injection mold facilitating quick mold release as claimed in claim 7 wherein: The drive mechanism comprises a movable sleeve (33) sleeved on the hollow rotating shaft (5) and movable along the axial direction thereof, and a connecting arm (34) hingedly connected between the movable sleeve (33) and the hollow column (6), the connecting arm (34) is offset from the rotation center of the rotating shaft on the side connected with the hollow column (6), and the drive mechanism further comprises a drive structure for driving the movable sleeve (33) to move, so as to drive the hollow column (6) to swing.

9. A printer part injection mold facilitating quick mold release as claimed in claim 8 wherein: The drive structure comprises an electromagnet (35) fixedly arranged and a permanent magnet (36) fixedly arranged on the movable sleeve (33), and the energization direction of the electromagnet (35) is changed to drive the movable sleeve (33) to reciprocate on the hollow rotating shaft (5).

10. A printer part injection mold facilitating quick mold release as claimed in claim 8 wherein: The drive structure comprises a linear driver (37) fixedly arranged and a linkage block (38) fixedly arranged on the movable sleeve (33), a shifting block (39) is arranged on the telescopic rod of the linear driver (37), an annular groove (40) is arranged on the linkage block (38), and the shifting block (39) is located in the annular groove (40).

Images