Powerful backpressure device of injection molding machine

Abstract

The utility model discloses a powerful backpressure device of an injection molding machine, which comprises a base, an injection table arranged above the base, an injection mechanism arranged at one end of the injection table, a power mechanism arranged at the other end of the injection table and a backpressure mechanism arranged on the inner side of the injection table, a pressure spring is arranged on the outer side of the limiting round rod, supporting rings are arranged on the inner sides of the two ends of the pressure spring, and the supporting rings are connected with the limiting round rod through screws; the utility model has the advantages that the requirement on a backpressure control method is lower, and the loss of equipment is smaller after the load capacity is allocated to a plurality of components.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding machine manufacturing, and particularly relates to a strong back pressure device for an injection molding machine. Background Art

[0002] Injection molding machine is a kind of high-efficiency and high-precision plastic molding equipment, which is widely used in the production of plastic products. It is mainly composed of injection device, clamping device, hydraulic system, control system and other parts. The injection device is the core component of the injection molding machine. It melts the plastic raw material at high temperature, then injects it into the mold under high pressure, and obtains the required plastic product after cooling and solidification. Injection molding machine has the characteristics of high degree of automation, high production efficiency and high molding precision. It can quickly and accurately produce plastic products of various shapes and sizes, and it is simple to operate and easy to maintain. It can meet the production needs of various plastic raw materials and products. It is one of the indispensable and important equipment in the modern plastic industry.

[0003] The common method of controlling back pressure of injection molding machines is to directly provide a high reverse pressure from the outside through the oil cylinder and apply it to the screw. This places high demands on the power components of the equipment. The rotating mechanism and the pushing and pressing mechanism need to be properly integrated to avoid mutual influence. In addition, the existence of the impact force on both sides makes the middle load-bearing structure maintain a high-load working state for a long time, which causes serious damage to the equipment. Utility Model Content

[0004] The utility model aims to provide a strong back pressure device for an injection molding machine in order to solve the problems that the common method for controlling the back pressure of an injection molding machine has high requirements and the high-load working equipment has serious loss.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: it comprises a base, a shooting platform is arranged above the base, an injection mechanism is arranged at one end of the shooting platform, a power mechanism is arranged at the other end of the shooting platform, a back pressure mechanism is arranged on the inner side of the shooting platform, the back pressure mechanism comprises a hydraulic cylinder, the hydraulic cylinder is connected to the shooting platform by screws, a limiting round rod is arranged at one end of the hydraulic cylinder, the other end of the limiting round rod is fixedly connected to the shooting platform, a pressure spring is arranged on the outer side of the limiting round rod, support rings are arranged on the inner sides of both ends of the pressure spring, and the support ring is connected to the limiting round rod by screws.

[0006] Furthermore, the injection mechanism includes an injection barrel, a feed port is provided on the top of the injection barrel, a plurality of heating rings are provided on the outside of the injection barrel, a feeding screw is provided on the inside of the injection barrel, a push rod is fixedly provided at the tail end of the feeding screw, the push rod passes through the tail end of the injection barrel, and the injection barrel is connected to the shooting platform by screws.

[0007] Furthermore, the power mechanism includes a hydraulic multi-way valve block, an oil delivery nozzle is provided below the hydraulic multi-way valve block, the hydraulic multi-way valve block is connected to the oil delivery nozzle by a pipeline, the oil delivery nozzle is connected to the base by screws, a propulsion platform is provided on the side of the hydraulic multi-way valve block, and a high-torque motor is penetrated through the inside of the propulsion platform.

[0008] Furthermore, the output end of the high torque motor is fixedly connected to the push rod, the high torque motor is connected to the propulsion platform and the hydraulic multi-way valve block by screws, and the hydraulic multi-way valve block is connected to the hydraulic cylinder by a pipeline.

[0009] Furthermore, a limiting rotating wheel is fixedly provided in the middle section of the pushing rod, limiting round blocks are provided on both sides of the limiting rotating wheel, a rotating slot is provided on the inner side of the limiting round block, connecting blocks are provided at both ends of the limiting round block, a connecting round block is provided at one end of the connecting block, the connecting round block is connected to the output end of the hydraulic cylinder by screws, and the limiting round rod passes through the connecting round block.

[0010] Furthermore, a moving block is fixedly provided at the bottom of the shooting platform and the pushing platform, two sliding blocks are fixedly provided at the bottom of the moving block, two slide rails are provided on the base, the sliding blocks are located inside the slide rails, and the two moving blocks are moved by external equipment.

[0011] Furthermore, a circular hole groove is provided on the inner side of the output end of the hydraulic cylinder, and the limiting round rod is inserted into the circular hole groove.

[0012] Beneficial effects: The utility model has reasonable design and has the following beneficial effects:

[0013] 1. In the solution of the utility model, when the material inside the injection barrel pushes the feeding screw backward, the hydraulic multi-way valve block controls the hydraulic cylinder to maintain the same reverse pressure, and transmits the reverse pressure to the push rod and the limit rotating wheel through the connecting round block, the connecting block and the limit round block, forming a back pressure balance. The forces in multiple directions are not concentrated on a certain load-bearing component, avoiding component loss caused by high-load work;

[0014] 2. In the solution of the utility model, the pressure spring applies a force in the opposite direction to the hydraulic cylinder on the connecting round block, so as to assist in maintaining the pressure balance;

[0015] 3. In the solution of the utility model, the limiting rotating wheel rotates in the rotating slot, so that the limiting circle block will not affect the rotation of the push rod when pressure is applied. Since the mechanism for adjusting the back pressure and the mechanism for controlling the rotation are not integrated together, they will not affect each other and cause an antagonistic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the local structure of the shooting platform of the utility model;

[0018] Figure 3 It is a partial structural sectional view of the injection mechanism of the utility model;

[0019] Figure 4 It is a partial structural sectional view of the back pressure mechanism of the utility model.

[0020] In the figure: 1-base, 2-shooting platform, 3-injection mechanism, 4-power mechanism, 5-back pressure mechanism, 6-moving block;

[0021] 11-slide rail, 31-injection barrel, 32-feeding port, 33-heating ring, 34-feeding screw, 35-pushing rod, 36-limiting rotating wheel, 37-limiting round block, 38-connecting block, 39-connecting round block, 41-hydraulic multi-way valve block, 42-oil delivery nozzle, 43-pushing platform, 44-high torque motor, 51-hydraulic cylinder, 52-limiting round rod, 53-pressure spring, 54-support ring, 61-slider, 371-rotating slot. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Combination Figures 1 to 4 A strong back pressure device for an injection molding machine is shown, comprising a base 1, a shooting platform 2 is arranged above the base 1, an injection mechanism 3 is arranged at one end of the shooting platform 2, a power mechanism 4 is arranged at the other end of the shooting platform 2, a back pressure mechanism 5 is arranged on the inner side of the shooting platform 2, and the back pressure mechanism 5 comprises a hydraulic cylinder 51, the hydraulic cylinder 51 is connected to the shooting platform 2 by screws, a limiting round rod 52 is arranged at one end of the hydraulic cylinder 51, the other end of the limiting round rod 52 is fixedly connected to the shooting platform 2, a pressure spring 53 is arranged on the outer side of the limiting round rod 52, support rings 54 are arranged on the inner sides of both ends of the pressure spring 53, and the support ring 54 is connected to the limiting round rod 52 by screws.

[0024] The injection mechanism 3 includes an injection barrel 31, a feed port 32 is provided on the top of the injection barrel 31, a plurality of heating rings 33 are provided on the outside of the injection barrel 31, a feeding screw 34 is provided on the inside of the injection barrel 31, a push rod 35 is fixedly provided at the tail end of the feeding screw 34, the push rod 35 passes through the tail end of the injection barrel 31, the injection barrel 31 is connected to the shooting platform 2 by screws, and the power mechanism 4 controls the push rod 35 to drive the feeding screw 34 to move horizontally;

[0025] The power mechanism 4 includes a hydraulic multi-way valve block 41, an oil delivery nozzle 42 is provided below the hydraulic multi-way valve block 41, the hydraulic multi-way valve block 41 is connected to the oil delivery nozzle 42 through a pipeline, the oil delivery nozzle 42 is connected to the base 1 through screws, a propulsion platform 43 is provided on the side of the hydraulic multi-way valve block 41, a high-torque motor 44 is penetrated inside the propulsion platform 43, and the hydraulic multi-way valve block 41 disperses the oil delivery nozzle 42 into the hydraulic cylinder 51 to accurately control the pressure applied to the injection mechanism 3;

[0026] The output end of the high torque motor 44 is fixedly connected to the push rod 35, the high torque motor 44 is connected to the push platform 43 and the hydraulic multi-way valve block 41 by screws, the hydraulic multi-way valve block 41 is connected to the hydraulic cylinder 51 by pipelines, and the high torque motor 44 drives the push rod 35 and the feeding screw 34 to rotate;

[0027] A limit rotating wheel 36 is fixedly provided in the middle section of the push rod 35, and limit round blocks 37 are provided on both sides of the limit rotating wheel 36. A rotating slot 371 is provided on the inner side of the limit round block 37, and connecting blocks 38 are provided at both ends of the limit round block 37. A connecting round block 39 is provided at one end of the connecting block 38. The connecting round block 39 is connected to the output end of the hydraulic cylinder 51 by screws, and the limit round rod 52 passes through the connecting round block 39. The hydraulic cylinder 51 applies pressure to the connecting round block 39, the connecting block 38 and the limit round block 37, and cooperates with the pressure spring 53 to maintain the pressure balance at both ends of the limit round block 37, so as to maintain the back pressure balance of the injection mechanism 3. The limit round block 37 limits the position of the limit rotating wheel 36;

[0028] A moving block 6 is fixedly provided at the bottom of the shooting platform 2 and the pushing platform 43, two sliders 61 are fixedly provided at the bottom of the moving block 6, two slide rails 11 are provided on the base 1, and the sliders 61 are located inside the slide rails 11. Both moving blocks 6 are moved by external equipment, and the shooting platform 2 and the pushing platform 43 move along the slide rails 11 through the moving block 6 and the sliders 61;

[0029] A circular hole is provided inside the output end of the hydraulic cylinder 51, and the limiting round rod 52 is inserted into the circular hole to prevent the hydraulic cylinder 51 and the pressure spring 53 from being offset by external forces and affecting the back pressure balance.

[0030] Working principle: When the utility model is in use, after the material is fed through the feed port, the high-torque motor rotates the feeding screw through the push rod to transport the material forward, and at the same time the heating ring heats the material inside the injection barrel, and the injection barrel is sent to the mold by moving the moving block and the slider along the slide rail. When the material inside the injection barrel pushes the feeding screw backward, the hydraulic multi-way valve block controls the hydraulic cylinder to maintain the same reverse pressure, and transmits the reverse pressure to the push rod and the limit rotating wheel through the connecting circle block, the connecting block and the limit circle block to form a balance. The pressure spring applies a force in the opposite direction of the hydraulic cylinder to the connecting circle block, which is convenient for assisting in maintaining pressure balance. The limit rotating wheel rotates in the rotating slot, so that the limit circle block will not affect the rotation of the push rod when pressure is applied.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A strong back pressure device for an injection molding machine, comprising a base (1), characterized in that: A shooting platform (2) is provided above the base (1), an injection mechanism (3) is provided at one end of the shooting platform (2), a power mechanism (4) is provided at the other end of the shooting platform (2), a back pressure mechanism (5) is provided inside the shooting platform (2), the back pressure mechanism (5) comprises a hydraulic cylinder (51), the hydraulic cylinder (51) is connected to the shooting platform (2) by screws, a limiting round rod (52) is provided at one end of the hydraulic cylinder (51), the other end of the limiting round rod (52) is fixedly connected to the shooting platform (2), a pressure spring (53) is provided outside the limiting round rod (52), support rings (54) are provided inside both ends of the pressure spring (53), and the support ring (54) is connected to the limiting round rod (52) by screws.

2. A strong back pressure device for an injection molding machine according to claim 1, characterized in that: The injection mechanism (3) comprises an injection barrel (31), a feed port (32) is provided on the top of the injection barrel (31), a plurality of heating rings (33) are provided on the outside of the injection barrel (31), a feeding screw (34) is provided on the inside of the injection barrel (31), a push rod (35) is fixedly provided at the tail end of the feeding screw (34), and the push rod (35) passes through the tail end of the injection barrel (31), and the injection barrel (31) is connected to the shooting platform (2) by screws.

3. A strong back pressure device for an injection molding machine according to claim 2, characterized in that: The power mechanism (4) comprises a hydraulic multi-way valve block (41), an oil delivery nozzle (42) is provided below the hydraulic multi-way valve block (41), the hydraulic multi-way valve block (41) and the oil delivery nozzle (42) are connected via a pipeline, the oil delivery nozzle (42) and the base (1) are connected via screws, a propulsion platform (43) is provided on the side of the hydraulic multi-way valve block (41), and a high-torque motor (44) is provided inside the propulsion platform (43).

4. The strong back pressure device for an injection molding machine according to claim 3, characterized in that: The output end of the high torque motor (44) is fixedly connected to the push rod (35), the high torque motor (44) is connected to the push platform (43) and the hydraulic multi-way valve block (41) by screws, and the hydraulic multi-way valve block (41) is connected to the hydraulic cylinder (51) by a pipeline.

5. A strong back pressure device for an injection molding machine according to claim 4, characterized in that: A limiting rotating wheel (36) is fixedly provided in the middle section of the pushing rod (35), limiting round blocks (37) are provided on both sides of the limiting rotating wheel (36), a rotating slot (371) is provided on the inner side of the limiting round block (37), connecting blocks (38) are provided at both ends of the limiting round block (37), a connecting round block (39) is provided at one end of the connecting block (38), the connecting round block (39) is connected to the output end of the hydraulic cylinder (51) by screws, and the limiting round rod (52) passes through the connecting round block (39).

6. A strong back pressure device for an injection molding machine according to claim 5, characterized in that: A moving block (6) is fixedly provided at the bottom of the shooting platform (2) and the pushing platform (43), two sliding blocks (61) are fixedly provided at the bottom of the moving block (6), two sliding rails (11) are provided on the base (1), the sliding blocks (61) are located inside the sliding rails (11), and the two moving blocks (6) are moved by external equipment.

7. A strong back pressure device for an injection molding machine according to claim 6, characterized in that: A circular hole groove is provided on the inner side of the output end of the hydraulic cylinder (51), and the limiting round rod (52) is inserted into the circular hole groove.

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