A mechanical press, a method for supplying and withdrawing pressure for an injection molding device

Abstract

The present invention provides a mechanical press, comprising a pressure-producing part and a pressure-supply part; the pressure-producing part comprises a reduction motor, a small synchronous wheel, a large synchronous wheel, a synchronous belt, a screw, a slider, a push frame, and a force transmission part, wherein the small synchronous wheel is connected to the reduction motor, the synchronous belt is sleeved on the large synchronous wheel and the small synchronous wheel, the driving end of the screw is connected to the large synchronous wheel, the slider is sleeved on the screw, and one end of the push frame is connected to the slider; the force transmission part is arranged at the end of the push frame away from the slider and contacts the push frame, and the push frame can push the force transmission part in a direction away from the large synchronous wheel to give the force transmission part a thrust; the pressure supply part comprises a relay plate and a pressure transmission column, the relay plate contacts the force transmission part, and the thrust can act on the relay plate through the force transmission part, and a pressure supply station is provided on the side of the relay plate away from the thrust force receiving part, and the pressure transmission column is arranged on the relay plate and corresponds to the pressure supply station. The present invention also provides a pressure supply and pressure removal method for injection molding equipment. The present invention can apply sufficiently large and stable pressure to the mold plate.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding pressure supply, and in particular to a mechanical press, and a pressure supply and pressure release method for injection molding equipment. Background Art

[0002] Presses (including punch presses and hydraulic presses) are versatile and compact machines. They offer a wide range of applications and high production efficiency, and are widely used in processes such as cutting, punching, blanking, bending, riveting, and forming. Currently, pneumatic presses are often used to perform pressurization operations. Pneumatic presses use air as the working medium to form blanks. They are widely used in processes such as punching, bending, stretching, and extrusion, directly producing finished or semi-finished products.

[0003] The operation of the injection molding equipment mainly includes the following steps: the mold is composed of two mold plates that fit together. During operation, the two mold plates are first quickly approached to a preset distance, and then the two mold plates are slowly fit together. This operation can prevent the two mold plates from being damaged due to high-speed collision; after the two mold plates are fit together, the pneumatic press increases the pressure to a preset pressure, and then ensures that one of the mold plates is fixed and applies a preset pressure to the other mold plate to make the two mold plates fit together as much as possible, and then the injection molding operation is carried out; after the injection molding operation is completed, the two mold plates are separated. Before separating the two mold plates, it is necessary to quickly evacuate the pressure output component to facilitate the rapid separation of the two mold plates.

[0004] When the pneumatic press is used in the above operation process, the following problems exist:

[0005] 1. Pneumatic presses have a significant disadvantage: gas leaks easily, resulting in low operating pressures and insufficient requirements for high output forces. Therefore, maintaining high and stable output pressure when applying pressure to the mold plate is a critical issue.

[0006] Regarding the need to quickly remove the pressure output component to facilitate the separation of the two mold plates, the air press releases pressure at a constant rate. Even after the pressure is no longer applied to the mold plates, it still maintains contact with them. Therefore, the two mold plates can only be separated after the pressure output component of the air press is completely free of contact. This long wait delays the work process. Therefore, how to quickly separate the pressure output component from the mold plates becomes another issue that needs to be addressed. Summary of the Invention

[0007] The present invention aims to solve at least one of the above-mentioned technical problems and provide a mechanical press and a pressure supply and pressure release method for injection molding equipment, which can apply sufficiently large and stable pressure to the mold plate.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A mechanical press comprises a pressure producing part and a pressure supply part;

[0010] The pressure-generating part includes a reduction motor, a small synchronous wheel, a large synchronous wheel, a synchronous belt, a screw rod, a slider, a push frame and a force transmission part, the small synchronous wheel is connected to the reduction motor, the large synchronous wheel and the small synchronous wheel are arranged on the same side, the synchronous belt is sleeved on the large synchronous wheel and the small synchronous wheel, the driving end of the screw rod is connected to the large synchronous wheel and the screw rod extends in a direction away from the reduction motor, the slider is sleeved on the screw rod, and one end of the push frame is connected to the slider;

[0011] The force transmission part is provided at one end of the pushing frame away from the slider and in contact with the pushing frame. The pushing frame can push the force transmission part in a direction away from the large synchronous wheel to give the force transmission part a thrust. Under the action of the thrust, the force transmission part can rise relative to the pushing frame. The pushing frame can pull the force transmission part toward the large synchronous wheel to make the force transmission part fall relative to the pushing frame.

[0012] The pressure supply part includes a relay plate and a pressure transmission column. The relay plate is in contact with the force transmission part. The thrust can act on the relay plate through the force transmission part. A pressure supply station is provided on the side of the relay plate away from the thrust force. The pressure transmission column is provided on the relay plate and corresponds to the pressure supply station.

[0013] Furthermore, the pressure transmission column is connected to a driving part, and the driving part can drive the pressure transmission column to move into the pressure supply station or move out of the pressure supply station.

[0014] The top of the driving member is a chain which has a first end fixed to the side panel that is located closest to the base and a second end of the driving member is engaged with the first and second gears and the transmission gear and is then connected with the spring which is fixed to the side panel that is located closest to the base.

[0015] Furthermore, the lower inclined top block includes an inclined sliding block, a lower stop block and two lower limit blocks, the inclined sliding block is slidably arranged on the bottom plate and one end of the inclined sliding block contacts the pushing frame, the lower stop block is arranged in the middle of the top surface of the inclined sliding block and the lower stop block extends along the length direction of the top surface of the inclined sliding block, the top surface of the lower stop block and the vertical distance from the top surface of the inclined sliding block to the bottom plate gradually decreases in the direction away from the pushing frame, and the ball is movably embedded on the top surface of the lower stop block; the two lower limit blocks are arranged at one end of the top surface of the inclined sliding block away from the pushing frame and are fixed on opposite sides of the lower stop block.

[0016] Furthermore, the lifting limit frame includes a vertical plate and two pads, one end of the vertical plate is installed at the end of the base plate away from the pushing frame and the vertical plate extends toward the relay plate, and the two pads are arranged at the end of the vertical plate away from the base plate and are spaced apart along the width direction of the vertical plate; a cam bearing follower is provided at the end of the upper slider facing the vertical plate, and the roller of the cam bearing follower is located between the two pads and in contact with the two pads.

[0017] Furthermore, an arc-shaped groove is provided in the middle of a side of the relay plate facing the upper slider; the lower inclined top block also includes a supporting arc column and a support block, the supporting arc column is provided in the middle of a side of the upper slider away from the lower inclined top block, the supporting arc column includes an arc surface, and the arc surface is limited in the arc groove; the support block is provided on the upper slider and is located on opposite sides of the supporting arc column, and the side of the support block away from the upper slider is in contact with the relay plate.

[0018] Furthermore, the pushing frame is provided with a pull-back groove along the length direction of the screw rod; the pressure-generating part also includes a screw sleeve and a pull-back spring, one end of the screw sleeve is located in the pull-back groove and the other end of the screw sleeve movably passes through the end of the pushing frame away from the large synchronous wheel and is connected to the force transmission part, and the pull-back spring is located in the pull-back groove and is sleeved on the screw sleeve.

[0019] Furthermore, the output power of the reduction motor is 4.4 kw, and the radius ratio of the small synchronous wheel to the large synchronous wheel is 1.00:2.33-2.50.

[0020] Furthermore, a pressure sensor is provided on the end of the pushing frame that contacts the force transmission part, and the pressure sensor is in contact with the force transmission part; an in-position sensor is provided on the pressure supply station, and a removal sensor is provided outside the pressure supply station, and the in-position sensor and the removal sensor are both used to sense the position of the pressure transmission column.

[0021] A method for applying and releasing pressure for injection molding equipment, for closing two mold blocks at a preset distance, applying pressure during the injection molding process, and releasing pressure after the injection molding is completed, comprises the following steps:

[0022] Providing an apparatus: providing the above-mentioned mechanical press, further comprising a control system, wherein the pressure sensor, the in-position sensor, and the removal sensor are all connected to the control system, the control system being configured to receive data from the pressure sensor, the in-position sensor, and the removal sensor and injection molding operation progress data of the injection molding equipment and control the operation of the reduction motor and the drive unit; placing the mechanical press below a pre-injection mold plate and placing the pressure supply station in contact with the mold plate;

[0023] Slow film closing: Start the driving part to move the pressure transmission column into the pressure supply position, and the in-position sensor senses the in-position signal and feeds back to the control system; start the reduction motor to move the slider along the screw rod in the direction away from the large synchronous wheel. At this time, the force transmission part rises relative to the pushing frame toward the mold plate and fits the movable mold plate toward the fixed mold plate. The pressure sensor constantly senses the pressure, obtains pressure data, and feeds back the pressure data to the control system in real time. During this process, the pressure data is always the first pressure value;

[0024] Pressure input: After the two mold plates are attached, the pressure data gradually increases from a first pressure value. When the pressure data reaches a preset pressure, the control system controls the reduction motor to pause, and the injection molding equipment starts the injection molding operation;

[0025] The pressure transmission column withdraws: when the injection molding operation is completed, the reduction motor is started again to move the slider along the screw toward the large synchronous wheel. When the pressure data reaches the first pressure value again, the control system controls the drive unit to drive the pressure transmission column out of the pressure supply station. When the removal sensor senses the removal signal and feeds back to the control system, the control system controls the drive unit to pause. At this time, the two mold plates can be quickly separated.

[0026] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0027] Compared to directly driving the screw with a reduction motor, the arrangement of a small synchronous pulley, a large synchronous pulley, and a synchronous belt slowly increases the thrust of the push frame on the force transmission unit. This thrust is greater than the force generated by directly driving the screw with a reduction motor, and the magnitude of the force output by the push frame can be controlled. Because the force transmission unit can rise and the distance it rises is predictable, the design can adjust the rise distance to a preset distance, so that the force transmission unit slowly rises as the pressure gradually increases, ultimately achieving the effect of slowly fitting the two mold plates together. Furthermore, through the control of the reduction motor, the pressure on the mold plates can be maintained stable.

[0028] After the injection molding operation is completed, as the force transmission unit descends relative to the push frame, the pressure transmission column gradually reduces the pressure on the mold plate. This pressure can be captured by the pressure sensor. When the pressure reaches a value that does not affect the separation of the mold plates, the push-pull cylinder moves the corresponding pressure transmission column out of the pressure supply station, thereby freeing up space for the two mold plates to separate and facilitate the rapid separation of the two mold plates. It can be seen that the movable arrangement of the pressure transmission column can quickly separate the pressure transmission column from the mold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a mechanical press.

[0030] Figure 2 Schematic diagram of the internal structure of the press part.

[0031] Figure 3 It is a structural diagram of the lower inclined top block.

[0032] Figure 4 It is a cross-sectional schematic diagram of the force transmission part and the pressure supply part.

[0033] Figure 5 It is a connection diagram of the lifting limit frame and the pressure supply part.

[0034] In the accompanying drawings, 10-reduction motor, 11-small synchronous wheel, 12-large synchronous wheel, 13-synchronous belt, 14-screw, 15-slider, 16-pushing frame, 161-pull back groove, 17-screw sleeve, 18-pull back spring, 2-force transmission part, 21-bottom plate, 211-guide rail, 212-roller, 22-lower inclined top block, 221-oblique slider, 222-lower stop block, 223-lower limit block, 224-ball, 225-lower cam bearing follower, 23-lifting limit frame, 231- Vertical plate, 232-pad, 24-upper slider, 25-cam bearing follower, 26-support arc column, 261-arc surface, 27-support block, 3-pressure supply part, 31-relay plate, 311-pressure supply station, 312-arc groove, 32-pressure transmission column, 33-guide plate, 34-synchronizing plate, 35-sensing block, 36-mounting table, 37-push-pull cylinder, 4-in-place sensor, 5-removal sensor, 6-mounting frame, 60-front end plate, 61-side plate, 62-top plate, 63-rear end plate. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly on the other component or there may be a central component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides a mechanical press for applying pressure to a mold plate of an injection molding device, comprising a mounting frame 6, a pressure producing member, and a pressure supply member 3.

[0039] The pressure-generating components include a reduction motor 10, a small synchronous pulley 11, a large synchronous pulley 12, a timing belt 13, a screw 14, a slider 15, a push frame 16, and the force transmission unit 2. The reduction motor 10 is mounted on one end of the mounting frame 6. The small synchronous pulley 11 is connected to the reduction motor 10. The large synchronous pulley 12 is located on the same side as the small synchronous pulley 11 and is fixed to the mounting frame 6. The timing belt 13 is connected to the large synchronous pulley 12 and the small synchronous pulley 11. The screw 14 is fixed to the mounting frame 6. The driving end of the screw 14 is connected to the large synchronous pulley 12 and the screw 14 extends away from the reduction motor 10. The slider 15 is connected to the screw 14, and one end of the push frame 16 is connected to the slider 15.

[0040] The force transmission unit 2 is located at the end of the push frame 16 facing away from the slider 15 and in contact with the push frame 16. Specifically, a pressure sensor is provided on the end of the push frame 16 that contacts the force transmission unit 2. The pressure sensor is in contact with the force transmission unit 2. The push frame 16 can push the force transmission unit 2 away from the large synchronous wheel 12, thereby applying a thrust to the force transmission unit 2. This thrust can cause the force transmission unit 2 to rise relative to the push frame 16. The pressure sensor is used to sense the magnitude of the thrust and obtain pressure data. The force transmission unit 2 can also descend relative to the push frame 16.

[0041] The pushing frame 16 can pull the force transmission part 2 toward the large synchronous wheel 12 so that the force transmission part 2 can descend relative to the pushing frame 16. Specifically, the pushing frame 16 is provided with a pull-back groove 161 along the length direction of the screw rod 14. In detail, there are two pull-back grooves 161, and the two pull-back grooves 161 are distributed on opposite sides of the pushing frame 16; the pressure-producing part also includes two groups of pull-back parts, one group of pull-back parts is arranged in a pull-back groove 161, and the pull-back part includes a screw sleeve 17 and a pull-back spring 18, one end of the screw sleeve 17 is located in the pull-back groove 161 and the other end of the screw sleeve 17 movably passes through the end of the pushing frame 16 away from the large synchronous wheel 12 and is connected to the force transmission part 2, the outer diameter of one end of the screw sleeve 17 is larger than the outer diameter of the other end of the screw sleeve 17, the pull-back spring 18 is located in the pull-back groove 161 and is sleeved on the screw sleeve 17.

[0042] The pressure supply part 3 includes a relay plate 31 and a pressure transmission column 32. The relay plate 31 is in contact with the force transmission part 2. The thrust can act on the relay plate 31 through the force transmission part 2. A pressure supply station 311 is provided on the side of the relay plate 31 away from the thrust force. The pressure transmission column 32 is provided on the relay plate 31 and can correspond to the pressure supply station 311.

[0043] The reduction motor 10 is started, driving the small synchronous wheel 11 to rotate along the first circumferential direction. The small synchronous wheel 11 drives the large synchronous wheel 12 to rotate through the synchronous belt 13. The large synchronous wheel 12 drives the screw 14 to rotate. The screw 14 drives the slider 15 to move away from the large synchronous wheel 12 and push the force transmission part 2 through the push frame 16, thereby applying a thrust to the force transmission part 2. This thrust is fed back to the pressure sensor to obtain pressure data. As the push frame 16 pushes the force transmission part 2, the force transmission part 2 rises relative to the push frame 16 due to the thrust. During the rising process of the force transmission part 2, the pressure transmission column 32 also rises relative to the pushing frame 16. At this time, the pressure transmission column 32 pushes the two mold plates to fit together. When the preset distance between the two mold plates drops to 0, the thrust is continuously output, and the mold plates can be supplied with pressure. When the thrust pressure data reaches the preset pressure, the reduction motor 10 stops driving. At this time, the thrust of the pushing frame 16 on the force transmission part 2, that is, the pressure of the pressure transmission column 32 on the mold plate can be kept stable, and the injection molding operation can be carried out.

[0044] In the above process, compared with directly driving the screw 14 to rotate through the reduction motor 10, the setting of the small synchronous wheel 11, the large synchronous wheel 12 and the synchronous belt 13 can slowly increase the thrust of the push frame 16 on the force transmission part 2, and this thrust is greater than the force generated by directly driving the screw 14 to rotate through the reduction motor 10, and the magnitude of the force output by the push frame 16 can be controlled. Since the force transmission part 2 can rise and the distance it rises can be predicted, the distance it rises can be adjusted to a preset distance during design, so that the force transmission part 2 slowly rises as the pressure gradually increases, ultimately achieving the effect of slowly fitting the two mold plates. And through the control of the reduction motor 10, the pressure on the mold plate can be kept stable.

[0045] In addition, it can be seen from the aforementioned pressure supply process that the pressure-producing part can simultaneously complete the steps of slowly fitting the two mold plates together and gradually reaching the preset pressure. Compared with the prior art which requires waiting for the two mold plates to slowly fit together and waiting for the pneumatic press to rise to the preset pressure, the pressure supply process of the pressure-producing part can save the time of waiting for the pneumatic press to rise to the preset pressure, thereby speeding up the pressure supply.

[0046] In the process of the pushing frame 16 pushing the force transmission part 2, one end of the screw sleeve 17 compresses the return spring 18, and the return spring 18 deforms to generate elastic force. When the reduction motor 10 drives the small synchronous wheel 11 to rotate along the second circumferential direction, the second circumferential direction is opposite to the first circumferential direction, and the screw rod 14 drives the slider 15 to move toward the direction of the large synchronous wheel 12. The elastic force of the return spring 18 pulls the force transmission part 2 toward the direction of the large synchronous wheel 12 until it contacts the pressure sensor on the pushing frame 16, and the force transmission part 2 descends relative to the pushing frame 16.

[0047] In this embodiment, the mounting frame 6 includes a front plate 60, two side plates 61, a top plate 62, and a rear plate 63. The two side plates 61 are arranged opposite each other, with the front plate 60 connecting one end of the two side plates 61. The reduction motor 10 is mounted on one end of the front plate 60. The large synchronous pulley 12 is fixed to the other end of the front plate 60 and is located on the side of the front plate 60 facing away from the side plates 61. The screw rod 14 is fixed between the two side plates 61. The driving end of the screw rod 14 extends from the front plate 60 to the large synchronous pulley 12 and is connected to the large synchronous pulley 12. The opposite sides of the top plate 62 connect the two side plates 61 facing the reduction motor 10, and one end of the top plate 62 is connected to the front plate 60. One end of the rear plate 63 is connected to the other end of the top plate 62. The other end of the rear plate 63 extends into the push frame 16 and is located between the two pull-back grooves 161. The end of the screw rod 14 facing away from the driving end is connected to the rear plate 63. Through the structural setting of the mounting frame 6, the spatial arrangement of the reduction motor 10, the small synchronous wheel 11, the large synchronous wheel 12, the synchronous belt 13, the screw rod 14, the slider 15 and the push frame 16 can be made more compact, saving installation space.

[0048] In this embodiment, a mechanical press is used to provide pressure for an injection molding machine. The required pressure is 384.9 Nm. Considering cost and performance, a Yaskawa reduction motor 10 with an output power of 4.4 kW is selected to drive the small synchronous pulley 11. The radius ratio of the small synchronous pulley 11 to the large synchronous pulley 12 is 1.00:2.33-2.50. Preferably, the radius ratio of the small synchronous pulley 11 to the large synchronous pulley 12 is 1.00:2.33. Table 1 shows the range of pressure output by the pressure transmission column 32 at different radius ratios of the small synchronous pulley 11 to the large synchronous pulley 12 when driven by the reduction motor 10.

[0049]

[0050] As can be seen from Table 1, when the radius ratio of the small synchronous wheel 11 to the large synchronous wheel 12 is 1.00:2.33, the pressure output by the pressure transmission column 32 can reach 384.9 Nm. Although the pressure output by the pressure transmission column 32 gradually increases when the radius ratio is less than 1.00:2.33, after multiple tests, it was found that based on the output power of the reduction motor 10 with a power of 4.4 kW and the overall structure of the mechanical press, when the radius ratio is less than 1.00:2.50, the energy consumed by the reduction motor 10 will greatly increase to achieve the preset output pressure. Therefore, the optimal solution is to select a radius ratio within the range of 1.00:2.33-2.50, which not only reduces cost but also improves work efficiency.

[0051] In this embodiment, the force transmission unit 2 includes a base plate 21, a lower inclined ejector block 22, a lifting limiter 23, and an upper slider 24. The base plate 21 is located at the end of the push frame 16 that faces away from the large synchronous wheel 12 and extends away from the push frame 16. Opposite sides of the base plate 21 are connected to the two side plates 61. The base plate 21 is made of quenched steel. After applying pressure to the mold plate, it is guaranteed not to deform due to the force applied, and the force output to the lower inclined ejector block 22 is uniform and stable.

[0052] The lower inclined top block 22 is slidably provided on the bottom plate 21 and contacts the push frame 16. The vertical distance from the top surface of the lower inclined top block 22 to the bottom plate 21 gradually decreases in the direction away from the push frame 16. A ball 224 is movably embedded on the top surface of the lower inclined top block 22. Specifically, the lower inclined top block 22 includes an inclined sliding block 221, a lower stop block 222 and two lower limit blocks 223. The inclined slider 221 is slidably arranged on the base plate 21. In detail, the base plate 21 is provided with two wire rails 211 along the width direction, and a limiting guide groove is formed between the two wire rails 211; the wire rail 211 extends along the length direction of the base plate 21, and a guide groove is opened on the wire rail 211 along the length direction, and a plurality of rollers 212 are arranged in a linear array in the guide groove; two lower cam bearing followers 225 are provided in the middle of the bottom of the inclined slider 221, and the rollers of the two lower cam bearing followers 225 are movably limited in the limiting guide groove and contact the two wire rails 211, the bottom surface of the inclined slider 221 contacts the rollers 212, and one end of the inclined slider 221 contacts the pressure sensor on the push frame 16; the arrangement of the lower cam bearing follower 225 can ensure that the displacement of the inclined slider 221 always moves in a straight line along the limiting guide groove, and the arrangement of the rollers 212 can reduce the friction between the inclined slider 221 and the base plate 21 when moving.

[0053] The two lower limit blocks 223 are provided at one end of the top surface of the inclined slide block 221 away from the pushing frame 16 and are fixed on the opposite sides of the lower stop block 222. The two lower limit blocks 223 can further limit the lower stop block 222 to the middle of the top surface of the inclined slide block 221.

[0054] The lifting limit frame 23 is installed on the base plate 21. Specifically, the lifting limit frame 23 includes a vertical plate 231 and two pads 232. One end of the vertical plate 231 is installed on the end of the base plate 21 away from the pushing frame 16 and the vertical plate 231 extends toward the relay plate 31. The two pads 232 are arranged at the end of the vertical plate 231 away from the base plate 21 and are spaced apart along the width direction of the vertical plate 231 to form a guide rail.

[0055] The upper slider 24 is movably arranged in the lifting limit frame 23 and the upper slider 24 is located on the side of the lower inclined top block 22 away from the bottom plate 21. The bottom surface of the upper slider 24 contacts the ball 224, so that the contact between the upper slider 24 and the lower block 222 only falls on a straight line connected by the ball 224, which can make the thrust of the lower block 222 on the upper slider 24 only converge on the contact surface between the ball 224 and the upper slider 24, which not only reduces the friction between the lower block 222 and the upper slider 24, but also concentrates the thrust on a straight line and acts on the upper slider 24, so that the thrust is more concentrated and effective.

[0056] The lifting limit frame 23 can limit the upper slider 24 from rising or falling relative to the push frame 16. Specifically, a cam bearing follower 25 is provided on the end of the upper slider 24 facing the vertical plate 231. The roller of the cam bearing follower 25 is located between and in contact with two pads 232. When the push frame 16 pushes the force transmission part 2, the push frame 16 pushes the inclined slider 221 along the length direction of the base plate 21 in a direction away from the large synchronous wheel 12. The inclined slider 221 presses against the upper slider 24 via the ball bearing 224. The upper slider 24 transmits the thrust to the cam bearing follower 25. The cam bearing follower 25 rises along the guide rail between the two pads 232 in a direction away from the base plate 21, thereby causing the upper slider 24 to rise relative to the push frame 16. When the screw rod 14 drives the slider 15 to move toward the large synchronous wheel 12, the elastic force of the return spring 18 pulls the inclined slider 221 toward the large synchronous wheel 12, and the upper slider 24 descends relative to the push frame 16 under the guidance of the cam bearing follower 25.

[0057] The relay plate 31 contacts the side of the upper slider 24 facing away from the lower inclined ejector block 22. After the thrust acts on the lower inclined ejector block 22, it can act on the relay plate 31 through the upper slider 24. Specifically, an arcuate groove 312 is provided in the middle of the side of the relay plate 31 facing the upper slider 24. The arcuate groove 312 extends along the width of the relay plate 31. The lower inclined ejector block 22 also includes a support arc column 26 and a support block 27. The support arc column 26 is provided in the middle of the side of the upper slider 24 facing away from the lower inclined ejector block 22. The support arc column 26 includes a curved surface 261, which is confined within the arcuate groove 312. The support block 27 is provided on the upper slider 24 and is located on opposite sides of the support arc column 26. The side of the support block 27 facing away from the upper slider 24 contacts the relay plate 31. The force applied to the upper slider 24 can be concentrated on the supporting arc column 26 and the two supporting blocks 27 and then act on the relay plate 31 , so that the force applied to the relay plate 31 can be more concentrated.

[0058] In this embodiment, the pressure transmission column 32 is connected to a driving portion, and the driving portion can drive the pressure transmission column 32 to move into the pressure supply station 311 or move out of the pressure supply station 311. Specifically, there are four pressure transmission columns 32, and the four pressure transmission columns 32 are divided into two groups, each group includes two pressure transmission columns 32, and the two groups of pressure transmission columns 32 are distributed at opposite ends of the relay plate 31. One group of pressure transmission columns 32 is connected to a driving part, and the pressure supply station 311 is located between the two groups of pressure transmission columns 32; the driving part includes a guide plate 33, a synchronization plate 34, a sensing block 35, a mounting platform 36 and a push-pull cylinder 37. The guide plate 33 is installed on the relay plate 31 and extends along the length direction of the relay plate 31; the push-pull cylinder 37 adopts the Yadeke cylinder ACP32*50, and the push-pull cylinder 37 is installed at one end of the guide plate 33 away from the other drive part, and the synchronization plate 34 is slidably sleeved on the guide plate 33 and perpendicular to the guide plate 33. The synchronization plate 34 is connected to the working end of the push-pull cylinder 37, and the two pressure transmission columns 32 in a corresponding group of pressure transmission columns 32 are installed at opposite ends of the synchronization plate 34. The sensing block 35 is mounted on the end of the synchronization plate 34. There are two mounting platforms 36, which are mounted on two opposite sides of the relay plate 31 and extend along the length of the relay plate 31. An in-position sensor 4 and a removal sensor 5 are provided on opposite ends of the mounting platform 36. Specifically, the middle portion of the mounting platform 36 is connected to the relay plate 31, and each end of the mounting platform 36 extends from the pressure supply station 311 to the push-pull cylinder 37. The in-position sensor 4 is mounted on the side of the mounting platform 36 corresponding to the pressure supply station 311, and the removal sensor 5 is mounted on the side of the mounting platform 36 corresponding to the push-pull cylinder 37. The in-position sensor 4 and the removal sensor 5 sense the position of a corresponding set of pressure transmission columns 32 through the displacement of the sensing block 35.

[0059] When the push-pull cylinder 37 drives the synchronizing plate 34 to move along the length of the guide plate 33 toward the other drive unit, the corresponding group of pressure-transmitting columns 32 can move into the pressure-supply station 311. At this time, the sensing block 35 moves to the in-position sensor 4. The in-position sensor 4 receives an in-position signal, ensuring that the pressure-transmitting columns 32 can be used to supply pressure. When the push-pull cylinder 37 drives the synchronizing plate 34 to move along the length of the guide plate 33 away from the other drive unit, the corresponding group of pressure-transmitting columns 32 can move out of the pressure-supply station 311. At this time, the sensing block 35 moves to the removal sensor 5, which receives a removal signal. After the injection molding operation is completed, as the force transmission unit 2 descends relative to the push frame 16, the pressure transmission column 32 gradually reduces the pressure on the mold plate. This pressure can be captured by the pressure sensor. When the pressure reaches a value that does not affect the separation of the mold plates, the push-pull cylinder 37 moves the corresponding pressure transmission column 32 out of the pressure supply station 311, thereby freeing up space for the two mold plates to separate and facilitate the rapid separation of the two mold plates. It can be seen that the movable arrangement of the pressure transmission column 32 can quickly separate the pressure transmission column 32 from the mold plate.

[0060] This embodiment also provides a pressure supply and pressure release method for injection molding equipment, which is used to close two mold blocks at a preset distance, apply pressure during the injection molding process, and release pressure after the injection molding is completed. The two mold blocks at the preset distance include a fixed mold plate and a movable mold plate, and the fixed mold plate and the movable mold plate are arranged relative to each other. The method specifically includes the following steps:

[0061] Providing an apparatus: Providing the above-mentioned mechanical press, the mechanical press also includes a control system. The pressure sensor, the in-position sensor 4, and the removal sensor 5 are all connected to the control system. The control system is used to receive data from the pressure sensor, the in-position sensor 4, and the removal sensor 5, as well as injection molding operation progress data of the injection molding equipment, and control the operation of the reduction motor 10 and the push-pull cylinder 37. Specifically, the control system includes a PLC controller and a control panel. The PLC controller is respectively connected to the pressure sensor, the in-position sensor 4, the removal sensor 5, the reduction motor 10, and the push-pull cylinder 37. The PLC controller receives control instructions from the control panel to control the reduction motor 10 and the push-pull cylinder 37.

[0062] The mechanical press is arranged below the movable mold plate for pre-injection and the pressure supply station 311 is in contact with the movable mold plate.

[0063] Slow film closing: Start the push-pull cylinder 37 to move the two sets of pressure transmission columns 32 into the pressure supply station 311. The in-position sensor 4 senses the in-position signal and feeds back to the control system. Start the reduction motor 10 to move the slider 15 along the screw rod 14 in the direction away from the large synchronous wheel 12. At this time, the force transmission part 2 rises relative to the push frame 16 toward the movable mold plate. The pressure sensor constantly senses the pressure it is subjected to, obtains pressure data, and feeds back the pressure data to the control system in real time. Specifically: the upper slider 24 rises toward the movable mold plate under the pushing action of the lower inclined top block 22. The upper slider 24 pushes the pressure transmission column 32 to rise during the rising process. During the rising process, the pressure transmission column 32 slowly pushes the movable mold plate toward the fixed mold plate, so that the two mold plates slowly fit together. During this process, the pressure data is always the first pressure value.

[0064] Pressure input: After the two mold plates are attached, the pressure data gradually increases from the first pressure value. When the pressure data reaches the preset pressure, the control system controls the reduction motor 10 to pause, and the injection molding equipment starts the injection molding operation;

[0065] The pressure transmission column 32 is evacuated: when the injection molding operation is completed, the reduction motor 10 is started again to move the slider 15 along the screw rod 14 toward the large synchronous wheel 12. When the pressure data is the first pressure value again, the control system controls the push-pull cylinder 37 to drive the pressure transmission column 32 out of the pressure supply station 311. When the removal sensor 5 senses the removal signal and feeds back to the control system, the control system controls the push-pull cylinder 37 to pause; at this time, the two mold plates can be quickly separated.

[0066] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A mechanical press, characterized in that: Including pressure producing parts and pressure supply parts (3); The pressure-generating part includes a reduction motor (10), a small synchronous wheel (11), a large synchronous wheel (12), a synchronous belt (13), a screw rod (14), a slider (15), a push frame (16) and a force transmission part (2), wherein the small synchronous wheel (11) is connected to the reduction motor (10), the large synchronous wheel (12) and the small synchronous wheel (11) are arranged on the same side, the synchronous belt (13) is sleeved on the large synchronous wheel (12) and the small synchronous wheel (11), the driving end of the screw rod (14) is connected to the large synchronous wheel (12) and the screw rod (14) extends in a direction away from the reduction motor (10), the slider (15) is sleeved on the screw rod (14), and one end of the push frame (16) is connected to the slider (15); The force transmission part (2) is provided at one end of the pushing frame (16) away from the slider (15) and in contact with the pushing frame (16); a pressure sensor is provided on the end of the pushing frame (16) in contact with the force transmission part (2); the pushing frame (16) can push the force transmission part (2) in a direction away from the large synchronous wheel (12) to give the force transmission part (2) a thrust, and the force transmission part (2) can rise relative to the pushing frame (16) under the action of the thrust; the pushing frame (16) can pull the force transmission part (2) in the direction of the large synchronous wheel (12) so that the force transmission part (2) can descend relative to the pushing frame (16); The pressure supply member (3) includes a relay plate (31) and a pressure transmission column (32), the relay plate (31) is in contact with the force transmission part (2), the thrust can act on the relay plate (31) through the force transmission part (2), a pressure supply station (311) is provided on the side of the relay plate (31) away from the thrust receiving side, and the pressure transmission column (32) is provided on the relay plate (31) and corresponds to the pressure supply station (311); The force transmission part (2) includes a bottom plate (21), a lower inclined top block (22), a lifting limit frame (23) and an upper slider (24), wherein the bottom plate (21) is arranged at one end of the pushing frame (16) away from the large synchronous wheel (12) and extends in a direction away from the pushing frame (16), the lower inclined top block (22) is slidably arranged on the bottom plate (21) and contacts the pushing frame (16), and the vertical distance from the top surface of the lower inclined top block (22) to the bottom plate (21) gradually decreases in a direction away from the pushing frame (16), and a ball (224) is movably embedded on the top surface of the lower inclined top block (22); the lifting limit frame (23) is provided with a plurality of movable balls (224). On the bottom plate (21), the upper slider (24) is movably arranged in the lifting limit frame (23) and the upper slider (24) is located on the side of the lower inclined top block (22) away from the bottom plate (21), the bottom surface of the upper slider (24) is in contact with the ball (224), and the lifting limit frame (23) can limit the upper slider (24) to rise or fall relative to the push frame (16); the relay plate (31) is in contact with the side of the upper slider (24) away from the lower inclined top block (22), and after the thrust acts on the lower inclined top block (22), it can act on the relay plate (31) through the upper slider (24); The pushing frame (16) is provided with a pull-back groove (161) along the length direction of the screw rod (14); the pressure-generating part also includes a screw sleeve (17) and a pull-back spring (18), one end of the screw sleeve (17) is located in the pull-back groove (161) and the other end of the screw sleeve (17) movably passes through the pushing frame (16) away from the end of the large synchronous wheel (12) and is connected to the force transmission part (2), the pull-back spring (18) is located in the pull-back groove (161) and is sleeved on the screw sleeve (17).

2. A mechanical press according to claim 1, characterized in that: The pressure transmission column (32) is connected to a driving unit, and the driving unit is capable of driving the pressure transmission column (32) to move into the pressure supply station (311) or to move out of the pressure supply station (311).

3. A mechanical press according to claim 2, characterized in that: The lower inclined top block (22) includes an inclined slider (221), a lower stopper (222) and two lower limit blocks (223). The inclined slider (221) is slidably arranged on the bottom plate (21) and one end of the inclined slider (221) contacts the push frame (16). The lower stopper (222) is arranged in the middle of the top surface of the inclined slider (221) and the lower stopper (222) extends along the length direction of the top surface of the inclined slider (221). The vertical distances from the top surface of the lower stop block (222) and the top surface of the inclined sliding block (221) to the bottom plate (21) gradually decrease in a direction away from the pushing frame (16), and the ball (224) is movably embedded on the top surface of the lower stop block (222); the two lower limit blocks (223) are provided at one end of the top surface of the inclined sliding block (221) away from the pushing frame (16) and are fixed to opposite sides of the lower stop block (222).

4. A mechanical press according to claim 2, characterized in that: The lifting limit frame (23) includes a vertical plate (231) and two pads (232), one end of the vertical plate (231) is mounted on the end of the bottom plate (21) away from the pushing frame (16) and the vertical plate (231) extends toward the relay plate (31), and the two pads (232) are arranged at the end of the vertical plate (231) away from the bottom plate (21) and are spaced apart along the width direction of the vertical plate (231); a cam bearing follower (25) is provided at the end of the upper slider (24) facing the vertical plate (231), and a roller of the cam bearing follower (25) is located between the two pads (232) and contacts the two pads (232).

5. A mechanical press according to claim 2, characterized in that: An arc groove (312) is provided in the middle of a side of the relay plate (31) facing the upper slider (24); the lower inclined top block (22) further includes a supporting arc column (26) and a support block (27), the supporting arc column (26) is provided in the middle of a side of the upper slider (24) away from the lower inclined top block (22), the supporting arc column (26) includes an arc surface (261), and the arc surface (261) is limited in the arc groove (312); the support block (27) is provided on the upper slider (24) and is located on opposite sides of the supporting arc column (26), and the side of the support block (27) away from the upper slider (24) contacts the relay plate (31).

6. A mechanical press according to claim 1, characterized in that: The output power of the reduction motor (10) is 4.4 kw, and the radius ratio of the small synchronous wheel (11) to the large synchronous wheel (12) is 1.00:2.33-2.

50.

7. A mechanical press according to claim 2 or 6, characterized in that: A pressure sensor is provided on the end of the pushing frame (16) that contacts the force transmission part (2), and the pressure sensor is in contact with the force transmission part (2); an in-position sensor (4) is provided on the pressure supply station (311), and a removal sensor (5) is provided outside the pressure supply station (311), and both the in-position sensor (4) and the removal sensor (5) are used to sense the position of the pressure transmission column (32).

8. A method for supplying and releasing pressure for injection molding equipment, used for closing two mold blocks at a preset distance, applying pressure during the injection molding process, and releasing pressure after the injection molding is completed, characterized in that: The following steps are involved: Providing an apparatus: providing a mechanical press according to claim 7, wherein the mechanical press further comprises a control system, wherein the pressure sensor, the in-position sensor (4), and the removal sensor (5) are all connected to the control system, and the control system is used to receive data from the pressure sensor, the in-position sensor (4), and the removal sensor (5) and injection molding operation progress data of the injection molding equipment and control the operation of the reduction motor (10) and the drive unit; arranging the mechanical press below a pre-injection mold plate and making the pressure supply station (311) contact the mold plate; Slow film closing: start the driving part to move the pressure transmission column (32) into the pressure supply station (311), and the in-position sensor (4) senses the in-position signal and feeds back to the control system; start the reduction motor (10) to move the slider (15) along the screw rod (14) in the direction away from the large synchronous wheel (12), at this time, the force transmission part (2) rises relative to the pushing frame (16) toward the mold plate and fits the movable mold plate toward the fixed mold plate, the pressure sensor constantly senses the pressure, obtains pressure data, and feeds back the pressure data to the control system in real time. During this process, the pressure data is always the first pressure value; Pressure input: after the two mold plates are attached, the pressure data gradually increases from a first pressure value. When the pressure data reaches a preset pressure, the control system controls the reduction motor (10) to pause, and the injection molding equipment starts the injection molding operation; The pressure transmission column (32) is withdrawn: when the injection molding operation is completed, the reduction motor (10) is started again to move the slider (15) along the screw rod (14) toward the large synchronous wheel (12). When the pressure data is the first pressure value again, the control system controls the drive unit to drive the pressure transmission column (32) to move out of the pressure supply station (311). When the removal sensor (5) senses the removal signal and feeds back to the control system, the control system controls the drive unit to pause; at this time, the two mold plates can be quickly separated.

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