An adaptive ejection mechanism for injection mold base

Abstract

An adaptive ejection mechanism for injection mold bases is disclosed. This invention relates to the field of injection mold technology. Ejector pins are respectively positioned above a mounting plate; each ejector pin is equipped with a pressure sensor; the pressure sensor has a built-in power supply and signal transmitter; lifting tubes are respectively fixed to the bottom of the ejector pins; a fixing rod is installed inside the lifting tube and fixed to the mounting plate; springs are respectively sleeved on the fixing rod, with both ends of the springs fixed to the lifting tube and the mounting plate; locking mechanisms are respectively located on the lifting tube; pull-back mechanisms are respectively located on the mounting plate and connected to the lifting tube; the ejection pressure is detected in real time by the pressure sensor, enabling automatic identification of areas with difficult demolding and targeted adjustments; the ejection components in areas with difficult demolding can be quickly fixed, avoiding excessive local ejection; the ejection action in areas with easy demolding can be temporarily slowed down, balancing the overall ejection force distribution; finally, uniform ejection is achieved through spring reset, effectively preventing product deformation or damage due to uneven ejection.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an adaptive ejection mechanism for injection mold bases. Background Technology

[0002] Demolding is a critical step in injection molding. Traditional ejection mechanisms typically employ uniform ejection, but due to complex product structures or uneven material shrinkage, some areas may experience significant demolding resistance. Uneven ejection force distribution can easily lead to defects such as product deformation, whitening, or damage. Therefore, an adaptive demolding ejection mechanism for injection mold bases is proposed. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing an adaptive ejection mechanism for injection mold frames. This mechanism uses a pressure sensor to detect ejection pressure in real time, automatically identifying areas with difficult ejection and making targeted adjustments. It can quickly fix the ejection components in areas with difficult ejection, preventing excessive local ejection. It can also temporarily slow down the ejection action in areas with easy ejection, balancing the overall ejection force distribution. Finally, it achieves uniform ejection through spring reset, effectively preventing product deformation or damage due to uneven ejection.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it includes a fixed plate, an ejector cylinder, and a mounting plate; the ejector cylinder is fixed on the fixed plate and connected to an external power source; the mounting plate is fixed to the movable end of the ejector cylinder;

[0005] It also includes: several ejector pins, each positioned above a mounting plate; each ejector pin has a pressure sensor; the pressure sensor has a built-in power supply and signal transmitter; several lifting tubes, each fixed to the bottom of the ejector pin; each lifting tube has a fixing rod inside, the fixing rod being fixed to the mounting plate; several springs, each sleeved on the fixing rod, with both ends of the springs fixed to the lifting tube and the mounting plate respectively; several locking mechanisms, each positioned on the lifting tube; and several pull-back mechanisms, each positioned on the mounting plate, the pull-back mechanisms being connected to the lifting tubes.

[0006] Preferably, a silicone pad is fixed to the top of the ejector pin, and an annular groove is provided at the bottom of the silicone pad, with the middle part of the annular groove of the silicone pad fitting against the pressure sensor.

[0007] Preferably, each locking mechanism comprises: two internally threaded tubes, each movably inserted into a lifting tube; two locking screws, each threadedly inserted into an internally threaded tube; several gears, each located at the outer end of a locking screw, the leftmost gear fixed to the locking screw, several gears on the same side meshing with each other, and a connecting shaft connecting the front and rear of the rightmost gear; two mounting brackets, the front and rear gears respectively screwed onto the mounting brackets via shafts and bearings, the mounting brackets being fixed to the lifting tube; a locking motor, fixed to the lifting tube via a mounting bracket, the output shaft of the locking motor being screwed to the connecting shaft via a coupling, shaft, and bevel gear pair; and the locking motor being electrically connected to a pressure sensor.

[0008] Preferably, a rubber pad is fixed to the inner end of the internally threaded tube, and the rubber pad abuts against the fixing rod.

[0009] Preferably, the pull-back mechanism comprises: two limiting frames, each fixed to the left and right bottom of the annular wall of the lifting tube; the limiting frames are C-shaped; two square rods, each movably embedded within the limiting frame; a limiting plate fixed to the square rod; and two drive screws, each threadedly threaded into the square rod; the bottom of the drive screws is screwed to a mounting plate via bearings; the bottom of the drive screws is connected via a pulley assembly; the pulley assembly is driven by a rotating motor connected to an external power source; the rotating motor is fixed to the mounting plate via a bracket; and the rotating motor is electrically connected to a pressure sensor.

[0010] Preferably, several auxiliary cylinders are fixed on a fixed plate, and the movable end of the auxiliary cylinder abuts against the mounting plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By detecting the ejection pressure in real time through a pressure sensor, it can automatically identify areas with difficult demolding and make targeted adjustments;

[0013] 2. Equipped with a locking mechanism, it can quickly secure the ejector components in areas that are difficult to demold, preventing excessive local ejection;

[0014] 3. It is equipped with a pull-back mechanism, which can temporarily slow down the ejection action in the easily demolded area and balance the overall ejection force distribution;

[0015] 4. Finally, the spring reset achieves uniform ejection, effectively preventing product deformation or damage due to uneven ejection. Attached Figure Description

[0016] Figure 1 This is the southwest isometric view of this utility model.

[0017] Figure 2 yes Figure 1 Enlarged view of part A in the image.

[0018] Figure 3 This is the southeast isometric view of this utility model.

[0019] Figure 4 yes Figure 3 Enlarged view of part B in the image.

[0020] Figure 5 This is a cross-sectional view of the silicone pad and a structural schematic diagram of the ejector pin and pressure sensor in this utility model.

[0021] Figure 6 This is a schematic diagram of the internally threaded tube and rubber gasket in this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Fixed plate; 2. Ejector cylinder; 3. Mounting plate; 4. Ejector pin; 5. Pressure sensor; 6. Silicone pad; 7. Lifting tube; 8. Fixed rod; 9. Spring; 10. Locking mechanism; 10-1. Internal threaded tube; 10-2. Rubber pad; 10-3. Locking screw; 10-4. Gear; 10-5. Connecting shaft; 10-6. Mounting bracket No. 1; 10-7. Mounting bracket No. 2; 10-8. Pull-back mechanism; 11-1. Limiting bracket; 11-2. Square rod; 11-3. Limiting piece; 11-4. Drive screw; 11-5. Pulley assembly; 11-6. Rotating motor; 12. Auxiliary cylinder. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] The specific implementation method adopts the following technical solution:

[0025] Please see Figure 1-6 This embodiment includes a fixed plate 1, an ejector cylinder 2, and a mounting plate 3; the ejector cylinder 2 is fixed to the fixed plate 1 by bolts, and the ejector cylinder 2 is connected to an external power source; the movable end of the ejector cylinder 2 is fixed to the mounting plate 3.

[0026] It also includes:

[0027] The ejector pin 4 is a plurality of pins, and is respectively located above the mounting plate 3; the ejector pin 4 is equipped with a pressure sensor 5; the pressure sensor 5 has a built-in power supply and signal transmitter; a silicone pad 6 is glued to the top of the ejector pin 4, and the bottom of the silicone pad 6 is provided with an annular groove, the middle part of the annular groove of the silicone pad 6 is fitted with the pressure sensor 5.

[0028] The lifting tube 7 is a plurality of tubes, and each tube is fixed to the bottom of the ejector pin 4; a fixing rod 8 is provided inside the lifting tube 7 and the fixing rod 8 is fixed to the mounting plate 3.

[0029] Spring 9, there are several springs 9, and they are respectively sleeved on the fixed rod 8. The two ends of the spring 9 are respectively fixed on the lifting tube 7 and the mounting plate 3;

[0030] A locking mechanism 10, wherein there are several locking mechanisms 10, each disposed on the lifting tube 7; each locking mechanism 10 includes:

[0031] There are two internally threaded tubes 10-1, which are movably inserted into the lifting tube 7 respectively; the inner end of the internally threaded tube 10-1 is glued and fixed with a rubber pad 10-2, and the rubber pad 10-2 abuts against the fixing rod 8.

[0032] Locking screw 10-3, there are two locking screws 10-3, and they are respectively inserted into the internal threaded tube 10-1 by threaded connection;

[0033] Gear 10-4, there are several gears 10-4, and they are respectively located on the outer end of the locking screw 10-3. The leftmost gear 10-4 is fixed to the locking screw 10-3. Several gears 10-4 on the same side are meshed with each other. The rightmost gear 10-4 is connected to the front and rear by a connecting shaft 10-5.

[0034] There are two mounting brackets 10-6. The front and rear gears 10-4 are respectively screwed onto the mounting brackets 10-6 via shafts and bearings. The mounting brackets 10-6 are fixed to the lifting tube 7.

[0035] The locking motor 10-7 is fixed to the lifting tube 7 via the second mounting bracket 10-8. The output shaft of the locking motor 10-7 is spun to the connecting shaft 10-5 via a coupling, a shaft, and a bevel gear pair. The locking motor 10-7 is electrically connected to the pressure sensor 5.

[0036] A pull-back mechanism 11, wherein there are several pull-back mechanisms 11, each disposed on the mounting plate 3, and the pull-back mechanism 11 is connected to the lifting pipe 7; the pull-back mechanism 11 includes:

[0037] Limiting frame 11-1, there are two limiting frames 11-1, and they are respectively fixed to the left and right bottom of the annular wall of the lifting pipe 7; the limiting frame 11-1 has a "C" shaped structure;

[0038] Square rod 11-2, there are two square rods 11-2, and they are respectively movably embedded in the limiting frame 11-1;

[0039] The limiting piece 11-3 is fixed on the square rod 11-2;

[0040] Two drive screws 11-4 are threadedly threaded into the square rod 11-2. The bottom of each drive screw 11-4 is screwed onto the mounting plate 3 via a bearing. The bottom of each drive screw 11-4 is connected to the mounting plate 3 via a pulley assembly 11-5. The pulley assembly 11-5 is driven by a rotary motor 11-6, which is connected to an external power source. The rotary motor 11-6 is fixed to the mounting plate 3 by a bracket. The rotary motor 11-6 is electrically connected to the pressure sensor 5.

[0041] Auxiliary cylinder 12, there are several auxiliary cylinders 12, and they are fixed on the fixing plate 1 respectively.

[0042] When using this invention, the ejector cylinder 2 is activated, along with several auxiliary cylinders 12, to eject the mounting plate 3, which in turn ejects several ejector pins 4. The silicone pad 6 contacts the product, transmitting pressure to the pressure sensor 5. If the pressure sensor 5 detects significant pressure, indicating that demolding is difficult, the corresponding locking motor 10-7 is activated, causing the gear 10-4 to rotate. This rotates the locking screw 10-3, causing the internal threaded tube 10-1 to move inward, placing the rubber pad 10-2 against the fixing rod 8, thus fixing the lifting tube 7. Finally, the rotating motors 11 below the remaining ejector pins 4 are activated. -6 causes the pull-back screw to rotate, driving the square rod 11-2 to descend, causing the limit plate 11-3 to lock onto the limit frame 11-1, driving the lifting tube 7 to descend, so that the easier demolding position is temporarily not ejected, and the ejection cylinder 2 and auxiliary cylinder 12 continue to eject, so that the pressure of the more difficult demolding position decreases. The locking motor 10-7 and the rotation motor 11-6 are started to release the locking and pull-back states respectively, so that the spring 9 can be reset. At this time, the ejector pin 4 evenly ejects the product to demold, realizing adaptive demolding and avoiding product defects caused by uneven ejection pressure.

[0043] Compared with the prior art, the beneficial effects of this utility model are:

[0044] 1. The ejection pressure is detected in real time by the pressure sensor 5, which can automatically identify areas with difficult demolding and make targeted adjustments.

[0045] 2. The locking motor 10-7 and locking screw 10-3 are used to quickly fix the ejection components in areas that are difficult to demold, thus avoiding excessive local ejection;

[0046] 3. By rotating motor 11-6 to drive the pull-back screw to descend, the ejection action of the easily demolded area can be temporarily slowed down, and the overall ejection force distribution can be balanced;

[0047] 4. Finally, the product is evenly ejected by the spring 9, which effectively prevents the product from being deformed or damaged due to uneven ejection.

[0048] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adaptive ejection mechanism for an injection mold base, comprising a fixed plate (1), an ejection cylinder (2), and a mounting plate (3); the ejection cylinder (2) is fixed on the fixed plate (1) and connected to an external power source; the mounting plate (3) is fixed to the movable end of the ejection cylinder (2); characterized in that, It also includes: a push pin (4), the number of which is several and is respectively located above the mounting plate (3); a pressure sensor (5) is provided on the push pin (4); the pressure sensor (5) has a built-in power supply and signal transmitter; a lifting tube (7), the number of which is several and is respectively fixed to the bottom of the push pin (4); a fixing rod (8) is provided inside the lifting tube (7) and the fixing rod (8) is fixed on the mounting plate (3); a spring (9), the number of which is several and is respectively sleeved on the fixing rod (8), and the two ends of the spring (9) are respectively fixed on the lifting tube (7) and the mounting plate (3); a locking mechanism (10), the number of which is several and is respectively located on the lifting tube (7); a pull-back mechanism (11), the number of which is several and is respectively located on the mounting plate (3), and the pull-back mechanism (11) is connected to the lifting tube (7).

2. The adaptive ejection mechanism for injection mold base according to claim 1, characterized in that: A silicone pad (6) is fixed to the top of the ejector pin (4), and an annular groove is provided at the bottom of the silicone pad (6). The middle part of the annular groove of the silicone pad (6) is fitted to the pressure sensor (5).

3. The adaptive ejection mechanism for injection mold base according to claim 1, characterized in that: The locking mechanism (10) includes: two internally threaded tubes (10-1), each movably inserted into the lifting tube (7); two locking screws (10-3), each threadedly inserted into the internally threaded tube (10-1); and several gears (10-4), each located at the outer end of the locking screw (10-3), with the leftmost gear (10-4) fixed to the locking screw (10-3), and several gears (10-4) meshing with each other on the same side, and the rightmost gear (10-4) being fixed to the locking screw (10-3). 10-4) A connecting shaft (10-5) is connected between the front and rear; a first mounting bracket (10-6), there are two first mounting brackets (10-6), the front and rear gears (10-4) are respectively screwed onto the first mounting bracket (10-6) through shafts and bearings, the first mounting bracket (10-6) is fixed to the lifting tube (7); a locking motor (10-7), the locking motor (10-7) is fixed to the lifting tube (7) through a second mounting bracket (10-8), the output shaft of the locking motor (10-7) is screwed onto the connecting shaft (10-5) through a coupling, shaft and bevel gear pair; the locking motor (10-7) is electrically connected to the pressure sensor (5).

4. The adaptive ejection mechanism for injection mold base according to claim 3, characterized in that: A rubber pad (10-2) is fixed to the inner end of the internally threaded tube (10-1), and the rubber pad (10-2) abuts against the fixed rod (8).

5. The adaptive ejection mechanism for injection mold base according to claim 1, characterized in that: The pull-back mechanism (11) includes: a limiting frame (11-1), two of which are fixed to the left and right bottom of the ring wall of the lifting tube (7); the limiting frame (11-1) is C-shaped; two square rods (11-2), two of which are movably embedded in the limiting frame (11-1); a limiting piece (11-3), the limiting piece (11-3) being fixed on the square rod (11-2); and a drive screw (11-4), the drive screw (11-4) being fixed to the square rod (11-2). The number of -4) is two, and they are threaded through the square rod (11-2); the bottom of the drive screw (11-4) is screwed onto the mounting plate (3) through a bearing; the bottom of the drive screw (11-4) is connected to the transmission through the pulley assembly (11-5); the pulley assembly (11-5) is driven by the rotating motor (11-6), and the rotating motor (11-6) is connected to an external power source; the rotating motor (11-6) is fixed on the mounting plate (3) by a bracket; the rotating motor (11-6) is electrically connected to the pressure sensor (5).

6. The adaptive ejection mechanism for injection mold base according to claim 1, characterized in that: Several auxiliary cylinders (12) are fixed on the fixed plate (1) respectively, and the movable end of the auxiliary cylinder (12) abuts against the mounting plate (3).

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