Demoulding mechanism of plastic bottle cap mould

Abstract

The invention provides a demolding mechanism of a plastic bottle cap mold, and relates to the technical field of demolding mechanisms. The lower mold is fixed to the mold table, the upper mold is pressed on the top of the lower mold, and a bottle cap is formed in a mold groove of the lower mold in an injection molding mode. A discharging rod slides in the lower die, a sealing block is welded to one end of the upper portion of the discharging rod, and the top end face of the sealing block makes contact with the top end face of the inner wall of the bottle cap. By integrating the first discharging assembly, the automatic discharging process after bottle cap injection molding is achieved; after the mold completes injection molding and is cooled, the first driving block automatically moves leftwards under the action of the auxiliary assembly, the discharging rod is jacked to ascend, and therefore the bottle cap is easily jacked out of the mold; the process does not need manual intervention, so that the production efficiency is greatly improved; and due to the design of the auxiliary assembly, the upper die can move up and down to directly drive the first driving block to move, automatic control over the discharging action is achieved, and the automation level of the production line is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of demoulding mechanisms, in particular to a demoulding mechanism for a plastic bottle cap mould. Background Art

[0002] The demoulding mechanism, also called the ejection mechanism or the ejector mechanism, is a mechanism that ejects the product from the mold cavity in each cycle of injection molding. It is a crucial part of the injection mold and directly affects the quality and production efficiency of the product; the main function of the demoulding mechanism is to smoothly eject the cooled and solidified plastic parts from the mold cavity or core when the mold is opened, so as to carry out the next round of injection molding production.

[0003] Although the existing demoulding mechanism can complete the ejection of the bottle cap, it cannot loosen the bottle cap from the mold groove by vibration before ejecting the bottle cap, and the demoulding rod is easy to damage the bottle cap; the existing demoulding mechanism has a single structure, and only demoulds by ejecting the demoulding rod, but cannot assist in demoulding by gas unloading.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a demoulding mechanism of a plastic bottle cap mold is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a demoulding mechanism for a plastic bottle cap mold to solve the problem that although the existing demoulding mechanism can complete the ejection of the bottle cap, it cannot loosen the bottle cap from the mold groove by vibration before ejecting the bottle cap, and the demoulding rod is easy to damage the bottle cap; the existing demoulding mechanism has a single structure and can only demould by ejecting the demoulding rod, but cannot assist in demoulding by gas unloading.

[0006] The present invention provides a demoulding mechanism for a plastic bottle cap mold, which specifically comprises: a lower mold; the lower mold is fixed on a mold table, an upper mold is pressed on the top of the lower mold, and a bottle cap is injection molded in a mold groove of the lower mold; a discharge rod is slidably arranged in the lower mold, a sealing block is welded at an upper end of the discharge rod, and the top surface of the sealing block contacts the top surface of an inner wall of the bottle cap; a first driving block is slidably arranged in the lower mold, the first driving block is located at the right side of the discharge rod, the left end surface of the first driving block is cut, and after the cutting process, the left end surface of the first driving block is an inclined structure, and when the first driving block moves to the left, the left end surface of the first driving block contacts the lower end of the discharge rod.

[0007] Furthermore, a protrusion is welded on the rear end face of the inner wall of the lower mold in a linear array, and the protrusion is a semi-cylindrical structure; a mounting block with a rectangular block structure is welded on the top end face of the first driving block, and a spring rod is fixed on the rear end face of the mounting block. The protruding end of the spring rod is polished, and the protruding end of the spring rod after polishing is an arc structure. The protruding end of the spring rod contacts the rear end face of the inner wall of the lower mold, and when the spring rod moves to the left, the protruding end of the spring rod is in a continuous elastic contact state with the protrusion.

[0008] Furthermore, the unloading rod, the sealing block, the first driving block, the mounting block, the protrusion and the spring rod together constitute a first unloading assembly.

[0009] Furthermore, a second unloading assembly is installed on the lower mold, and the second unloading assembly is composed of air holes, a telescopic gas cylinder, an exhaust pipe and a second connecting block. Six air holes are opened in a circular array at the top of the lower mold; a telescopic gas cylinder is fixed in the lower mold, and an exhaust pipe is connected to the left end of the telescopic gas cylinder. When the telescopic gas cylinder is squeezed, the exhaust pipe is in a jet state, and the exhaust pipe is connected to the six air holes.

[0010] Furthermore, a second connecting block is fixed to one end of the right side of the telescopic gas cylinder. The second connecting block is a rectangular block structure, and the bottom end surface of the second connecting block is fixed to the top end surface of the first driving block.

[0011] Furthermore, the six pores are all cylindrical hole structures, and the upper ends of the six pores are all in contact with the bottom end surface of the sealing block, and the sealing block is a sealing structure for the pores.

[0012] Furthermore, an auxiliary component is installed on the first driving block, and the auxiliary component consists of a connecting arm, a sphere, a fixed block and a second driving block. A connecting arm is welded on the left end face of the first driving block, and two spheres are welded on the connecting arm; a fixed block is fixed on the left end face of the upper mold, and two second driving blocks are welded on the left end face of the fixed block. The two second driving blocks are welded in an inclined shape, and the two second driving blocks are clamped on the outside of the connecting arm and in contact with the two spheres.

[0013] Furthermore, the unloading rod is a cylindrical rod-shaped structure, and the lower end of the unloading rod is polished. After the polishing, the lower end of the unloading rod is an arc-shaped structure.

[0014] Furthermore, a vibrator is fixed to the front end surface and the rear end surface of the lower mold, and both vibrators are electrically connected to an external power supply.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Improved automation and efficiency: By integrating the first unloading component, the automated unloading process after the bottle cap is injection molded is realized; when the mold is completed and cooled, the first drive block automatically moves to the left under the action of the auxiliary component, pushing the unloading rod up, thereby easily ejecting the bottle cap from the mold; this process does not require manual intervention, greatly improving production efficiency; the design of the auxiliary component enables the up and down movement of the upper mold to directly drive the movement of the first drive block, realizing automated control of the unloading action, and further improving the automation level of the production line.

[0017] Optimized unloading effect: The coordinated design of the unloading rod and the sealing block ensures the stable molding of the bottle cap during the injection molding process, while avoiding the problem of blockage caused by the plastic liquid entering the pores; the continuous elastic connection between the spring rod and the protrusion, as well as the use of the vibrator, can generate vibration during unloading, effectively loosening the bottle cap that is too tightly adhered to the injection molding groove, avoiding damage to the bottle cap during the unloading process, and ensuring the integrity and quality of the bottle cap; the second unloading component further assists the demolding of the bottle cap by jetting air through the pores, making the unloading process smoother and improving the unloading efficiency.

[0018] Reduced wear and extended service life: The polishing treatment on the lower end of the discharge rod and the reasonable design between the first drive block and the discharge rod effectively reduce the friction and wear between the components and extend the service life of the mold; the design of the spring rod and the protrusion also takes the wear problem into consideration, and through continuous elastic clamping, the stress is dispersed and the wear of the components is reduced.

[0019] Through the setting of the vibrator, the power of the two vibrators is turned on during unloading. The vibration generated by the vibrator can shake the bottle cap loose from the injection groove, which facilitates the demoulding of the bottle cap. Through the vibration of the vibrator and the coordinated vibration of the spring rod and the protrusion, the vibration effect is higher, and finally the demoulding action is better achieved.

[0020] In the present application, the vibration demolding of the spring rod and the protrusion, the push-in demolding of the unloading rod, and the gas demolding are all driven based on the upper mold switch, and no separate driving structure is required. On the one hand, this saves the cost and maintenance difficulty of the equipment, and on the other hand, it improves the structural and operational stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0022] In the attached picture:

[0023] Figure 1 The axial structural schematic diagram of the demoulding mechanism of the plastic bottle cap mold according to the present invention is shown;

[0024] Figure 2It shows a schematic diagram of the axial structure of the demoulding mechanism of the plastic bottle cap mold according to the present invention after partial sectioning;

[0025] Figure 3 It is shown that according to the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0026] Figure 4 It shows a schematic diagram of the main structure of the demoulding mechanism of the plastic bottle cap mold according to the present invention after partial cutaway;

[0027] Figure 5 It is shown that according to the present invention Figure 2 Schematic diagram of the axial structure after rotation;

[0028] Figure 6 It is shown that according to the present invention Figure 2 A schematic diagram of the axial structure after further separation;

[0029] Figure 7 It shows a schematic diagram of the axial structure of the lower mold and the discharge rod after being cut apart according to the present invention;

[0030] Figure 8 It is shown that according to the present invention Figure 7 Schematic diagram of the enlarged structure at B.

[0031] Reference numerals list

[0032] 1. Lower mold; 2. Upper mold; 3. Bottle cap; 4. First unloading assembly; 401. Unloading rod; 402. Sealing block; 403. First driving block; 404. Mounting block; 405. Protrusion; 406. Spring rod; 5. Second unloading assembly; 501. Air hole; 502. Telescopic gas cylinder; 503. Exhaust pipe; 504. Second connecting block; 6. Auxiliary assembly; 601. Connecting arm; 602. Sphere; 603. Fixing block; 604. Second driving block; 7. Vibrator. DETAILED DESCRIPTION

[0033] Embodiment 1:

[0034] As attached Figure 1 To Attachment Figure 8 As shown:

[0035] The present invention provides a demoulding mechanism for a plastic bottle cap mold, comprising: a lower mold 1; the lower mold 1 is fixed on a mold table, an upper mold 2 is pressed on the top of the lower mold 1, and a bottle cap 3 is injection molded in a mold groove of the lower mold 1; a discharge rod 401 is slidably arranged in the lower mold 1, a sealing block 402 is welded at one end of the upper end of the discharge rod 401, and the top surface of the sealing block 402 contacts the top surface of the inner wall of the bottle cap 3; a first driving block 403 is slidably arranged in the lower mold 1, and the first driving block 403 is located at the discharge rod 40 1, the left end face of the first driving block 403 is cut, and after the cutting process, the left end face of the first driving block 403 is an inclined structure. When the first driving block 403 moves to the left, the left end face of the first driving block 403 contacts the lower end of the discharge rod 401. During use, when the bottle cap 3 needs to be discharged, the first driving block 403 is driven to move to the left. When the first driving block 403 moves to the left, it can push the discharge rod 401 to move upward to complete the discharge action of the bottle cap 3.

[0036] Among them, the rear end face of the inner wall of the lower mold 1 is welded with a protrusion 405 in a linear array shape, and the protrusion 405 is a semi-cylindrical structure; the top end face of the first driving block 403 is welded with a mounting block 404 with a rectangular block structure, and the rear end face of the mounting block 404 is fixed with a spring rod 406, and the protruding end of the spring rod 406 is polished. After the polishing, the protruding end of the spring rod 406 is an arc structure, and the protruding end of the spring rod 406 contacts the rear end face of the inner wall of the lower mold 1. When the spring rod 406 When moving to the left, the protruding end of the spring rod 406 is in a continuous elastic contact state with the protrusion 405. When the first driving block 403 moves to the left, the protruding end of the spring rod 406 is continuously elastically engaged with the protrusion 405. Vibration can be generated by the continuous elastic engagement between the protruding end of the spring rod 406 and the protrusion 405. The bottle cap 3 can be loosened by the vibration, thereby realizing auxiliary unloading, avoiding the bottle cap 3 from adhering too tightly to the injection molding groove, and then damaging the bottle cap 3 when the unloading rod 401 is pushed.

[0037] The unloading rod 401 , the sealing block 402 , the first driving block 403 , the mounting block 404 , the protrusion 405 and the spring rod 406 together constitute the first unloading assembly 4 .

[0038] Among them, a second unloading assembly 5 is installed on the lower mold 1, and the second unloading assembly 5 is composed of an air hole 501, a telescopic gas cylinder 502, an exhaust pipe 503 and a second connecting block 504. Six air holes 501 are opened in a circular array at the top of the lower mold 1; a telescopic gas cylinder 502 is fixed in the lower mold 1, and an exhaust pipe 503 is connected to the left end of the telescopic gas cylinder 502. When the telescopic gas cylinder 502 is squeezed, the exhaust pipe 503 is in a jet state, and the exhaust pipe 503 is connected to the six air holes 501.

[0039] Among them, a second connecting block 504 is fixed to the right end of the telescopic gas cylinder 502. The second connecting block 504 is a rectangular block structure. The bottom end face of the second connecting block 504 is fixed to the top end face of the first driving block 403. When the first driving block 403 moves to the left, the second connecting block 504 follows the movement to the left to complete the squeezing of the telescopic gas cylinder 502. The gas enters the six air holes 501 through the exhaust pipe 503. When the gas is ejected from the air holes 501, the bottle cap 3 can be unloaded.

[0040] Among them, the six pores 501 are all cylindrical hole structures, and the upper ends of the six pores 501 are in contact with the bottom end surface of the sealing block 402. The sealing block 402 is a sealing structure for the pores 501. During the injection molding process, the sealing block 402 seals the pores 501 to prevent plastic liquid from entering the pores 501 and causing the pores 501 to be blocked.

[0041] Among them, an auxiliary component 6 is installed on the first driving block 403, and the auxiliary component 6 is composed of a connecting arm 601, a sphere 602, a fixed block 603 and a second driving block 604. A connecting arm 601 is welded on the left end face of the first driving block 403, and two spheres 602 are welded on the connecting arm 601; a fixed block 603 is fixed on the left end face of the upper mold 2, and two second driving blocks 604 are welded on the left end face of the fixed block 603. The two second driving blocks 604 are welded in an inclined shape, and the two second driving blocks 604 are clamped on the outside of the connecting arm 601 and contact the two spheres 602. During use, when the upper mold 2 is upward When moving, it can drive the fixed block 603 and the second driving block 604 to move upward. At this time, the second driving block 604 squeezes the upper sphere 602 to cause the connecting arm 601 to move to the left, completing the leftward movement of the first driving block 403; when the upper mold 2 moves downward, it can drive the fixed block 603 and the second driving block 604 to move downward. At this time, the second driving block 604 squeezes the lower sphere 602 to cause the connecting arm 601 to move to the left, completing the rightward movement of the first driving block 403. At this time, the unloading rod 401 breaks away from the obstruction of the first driving block 403, and the unloading rod 401 is reset under the action of its own gravity.

[0042] Among them, the unloading rod 401 is a cylindrical rod-shaped structure, and the lower end of the unloading rod 401 is polished. After polishing, the lower end of the unloading rod 401 is an arc-shaped structure, which can reduce the wear of the unloading rod 401 and the first driving block 403 during use.

[0043] Embodiment 2:

[0044] On the basis of the first embodiment, it also includes: a vibrator 7 is fixed to the front end face and the rear end face of the lower mold 1, and the two vibrators 7 are electrically connected to the external power supply. When unloading, the power of the two vibrators 7 is turned on, and the vibration generated by the vibrator 7 can shake the bottle cap 3 loose from the injection groove, thereby facilitating the demolding of the bottle cap 3.

[0045] The specific usage and function of this embodiment are as follows:

[0046] During demoulding, the upper mold 2 is driven to move upward. When the upper mold 2 moves upward, it can drive the fixed block 603 and the second driving block 604 to move upward. At this time, the second driving block 604 squeezes the upper sphere 602 to cause the connecting arm 601 to move leftward, completing the leftward movement of the first driving block 403; when the first driving block 403 moves leftward, it can push the unloading rod 401 to move upward to complete the unloading action of the bottle cap 3; at the same time, the protruding end of the spring rod 406 is continuously elastically engaged with the protrusion 405, and the continuous elastic engagement between the protruding end of the spring rod 406 and the protrusion 405 can generate vibration, and the bottle cap 3 can be shaken loose by the vibration; at the same time When the upper mold 2 moves downward, the fixed block 603 and the second driving block 604 can be driven to move downward. At this time, the second driving block 604 squeezes the sphere 602 below, causing the connecting arm 601 to move to the left, completing the rightward movement of the first driving block 403. At this time, the unloading rod 401 breaks away from the obstruction of the first driving block 403, and the unloading rod 401 is reset under the action of its own gravity.

Claims

1. A demoulding mechanism for a plastic bottle cap mold, characterized in that: include: A lower mold (1); the lower mold (1) is fixed on a mold table, an upper mold (2) is pressed on the top of the lower mold (1), and a bottle cap (3) is injection molded in the mold groove of the lower mold (1); a discharge rod (401) slides in the lower mold (1), and a sealing block (402) is welded to the upper end of the discharge rod (401).

2. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 1, characterized in that: The top end surface of the sealing block (402) contacts the top end surface of the inner wall of the bottle cap (3); a first driving block (403) is slidable left and right in the lower mold (1); the first driving block (403) is located on the right side of the discharge rod (401); the left end surface of the first driving block (403) is cut; after the cutting process, the left end surface of the first driving block (403) is an inclined structure; when the first driving block (403) moves to the left, the left end surface of the first driving block (403) contacts the lower end of the discharge rod (401).

3. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 2, characterized in that: The rear end face of the inner wall of the lower mold (1) is welded with a protrusion (405) in a linear array shape, and the protrusion (405) is a semi-cylindrical structure; a mounting block (404) in a rectangular block structure is welded to the top end face of the first driving block (403), and a spring rod (406) is fixed to the rear end face of the mounting block (404), and the protruding end of the spring rod (406) is polished. After the polishing process, the protruding end of the spring rod (406) is an arc structure, and the protruding end of the spring rod (406) contacts the rear end face of the inner wall of the lower mold (1), and when the spring rod (406) moves to the left, the protruding end of the spring rod (406) is in a continuous elastic contact state with the protrusion (405).

4. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 3, characterized in that: The discharge rod (401), the sealing block (402), the first driving block (403), the mounting block (404), the protrusion (405) and the spring rod (406) together form a first discharge assembly (4).

5. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 4, characterized in that: The lower mold (1) is provided with a second unloading assembly (5), which is composed of an air hole (501), a telescopic gas bottle (502), an exhaust pipe (503) and a second connecting block (504). The top of the lower mold (1) is provided with six air holes (501) in a circular array. A telescopic gas bottle (502) is fixed inside the lower mold (1), and an exhaust pipe (503) is connected to the left end of the telescopic gas bottle (502). When the telescopic gas bottle (502) is squeezed, the exhaust pipe (503) is in a jetting state, and the exhaust pipe (503) is connected to the six air holes (501).

6. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 5, characterized in that: A second connecting block (504) is fixed to one end of the right side of the telescopic gas cylinder (502). The second connecting block (504) is a rectangular block structure, and the bottom end surface of the second connecting block (504) is fixed to the top end surface of the first driving block (403).

7. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 6, characterized in that: The six pores (501) are all cylindrical hole structures, and the upper ends of the six pores (501) are in contact with the bottom end surface of the sealing block (402), and the sealing block (402) is a sealing structure of the pores (501).

8. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 7, characterized in that: An auxiliary component (6) is installed on the first driving block (403), and the auxiliary component (6) is composed of a connecting arm (601), a sphere (602), a fixed block (603) and a second driving block (604). A connecting arm (601) is welded on the left end surface of the first driving block (403), and two spheres (602) are welded on the connecting arm (601); a fixed block (603) is fixed on the left end surface of the upper mold (2), and two second driving blocks (604) are welded on the left end surface of the fixed block (603). The two second driving blocks (604) are welded in an inclined shape, and the two second driving blocks (604) are clamped on the outside of the connecting arm (601) and in contact with the two spheres (602).

9. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 8, characterized in that: The discharge rod (401) is a cylindrical rod-shaped structure, and the lower end of the discharge rod (401) is polished. After the polishing process, the lower end of the discharge rod (401) is an arc-shaped structure.

10. A demoulding mechanism for a plastic bottle cap mold as claimed in claim 9, characterized in that: A vibrator (7) is fixed to the front end face and the rear end face of the lower mold (1), and both vibrators (7) are electrically connected to an external power source.

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