Frame type mold pressing mechanism of injection molding machine

Abstract

The invention relates to the technical field of mold pressing, and discloses a frame type mold pressing mechanism of an injection molding machine, which comprises a mold pressing device mainly responsible for pressing a molten plastic material into a mold cavity so as to form a required plastic product; the bottom mold plate is mainly used for being matched with the mold pressing device to perform mold closing work; the buffering mechanism is mainly used for buffering pressure generated in the die pressing process; the top of the die pressing device is fixedly connected with a rail block, the right side, close to the top of the die pressing device, of the rail block is fixedly connected with a supporting plate, and the top of the rail block is slidably connected with a U-shaped block. According to the invention, the first-stage buffer assembly and the second-stage buffer assembly are arranged, so that the impact force generated in the die pressing process can be effectively absorbed, the rigid collision when the upper die plate is in direct contact with the bottom die plate is reduced, the safety of machine operation is improved, and more importantly, the damage to a machined part caused by the impact is avoided; therefore, the quality stability of the product is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of die pressing, and in particular to a frame-type die pressing mechanism for an injection molding machine. Background Art

[0002] The die pressing mechanism of an injection molding machine is a key part in the injection molding process, mainly responsible for pressing the molten plastic material into the mold cavity to form the required plastic products. The working principle and structure of the die pressing mechanism are relatively complex and consist of multiple parts, mainly including a mold clamping system, an injection system, a hydraulic transmission system, and an electrical control system.

[0003] Traditional die pressing mechanisms of injection molding machines often use simple rigid connections. However, during the die pressing process, due to the lack of an effective buffering mechanism, the direct contact between the upper template and the bottom template may cause damage to the workpiece, affecting product quality. In addition, when traditional die pressing mechanisms perform die pressing on workpieces, additional centering devices or manual adjustments are often required to ensure the accurate position of the workpiece, thus reducing work efficiency. Summary of the Invention

[0004] To make up for the above deficiencies, the present invention provides a frame-type die pressing mechanism for an injection molding machine, aiming to improve the problem of "the direct contact between the upper template and the bottom template may cause damage to the workpiece, affecting product quality" mentioned in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical scheme: A frame-type die pressing mechanism for an injection molding machine, comprising:

[0006] A die pressing device: mainly responsible for pressing the molten plastic material into the mold cavity to form the required plastic products;

[0007] A bottom template: mainly used to cooperate with the die pressing device for mold clamping work;

[0008] A buffering mechanism: mainly used to buffer the pressure generated during the die pressing process;

[0009] The top of the die pressing device is fixedly connected with an orbital block. A support plate is fixedly connected to the right side of the orbital block near the top of the die pressing device. The top of the orbital block is slidably connected with a U-shaped block. A buffer mechanism is arranged inside the U-shaped block. The buffer mechanism includes a primary buffer component, a secondary buffer component and an adjustment component. The primary buffer component includes a first sleeve rod. The first sleeve rod is rotatably connected to the inner wall of the U-shaped block. A second sleeve rod is slidably connected to the inner wall of the first sleeve rod. A rotating block is rotatably connected to the left side of the second sleeve rod. A push rod is fixedly connected to the left side of the rotating block. The secondary buffer component includes a first round block. The first round block is slidably connected to the inner wall of the first sleeve rod. The first round block and the first sleeve rod are elastically connected by a first spring. The adjustment component includes a second round block. A regulating rod is rotatably connected to the left side of the second round block. A circular ring block is fixedly connected to the left side of the second round block. The regulating rod and the circular ring block are elastically connected by a torsion spring. The middle part of the regulating rod penetrates through and is fixedly connected with two limiting blocks. A limiting groove is formed in the left part of the first sleeve rod.

[0010] As a further description of the above technical solution:

[0011] A spherical ball is fixedly connected to the outer wall of the rotating block. A groove is formed in the inner wall of the first sleeve rod. The bottom template is arranged inside the die pressing device. One end of the first spring is fixedly connected to the inner wall of the first sleeve rod. The other end of the first spring is fixedly connected to the left side of the first round block. The regulating rod penetrates through the first sleeve rod.

[0012] As a further description of the above technical solution:

[0013] A centering component is arranged inside the die pressing device.

[0014] As a further description of the above technical solution:

[0015] The centering component includes a triangular block. The triangular block is fixedly connected to the inside of the die pressing device. A T-shaped groove is formed in the front surface of the triangular block. A T-shaped block is slidably connected to the inner wall of the T-shaped groove.

[0016] As a further description of the above technical solution:

[0017] The T-shaped block and the triangular block are elastically connected by a second spring. One end of the second spring is fixedly connected to the inner wall of the T-shaped groove. The other end of the second spring is fixedly connected to the right side of the T-shaped block.

[0018] As a further description of the above technical solution:

[0019] An extrusion block is fixedly connected to the front surface of the T-shaped block. There are four groups of U-shaped blocks. And the other two groups of U-shaped blocks are fixedly connected to the top end of the support plate. The right side of the second sleeve rod is rotatably connected to the inner walls of the other two groups of U-shaped blocks.

[0020] As a further description of the above technical solution:

[0021] The groove is arranged in a spiral shape, and the spherical ball slides inside the groove.

[0022] As a further description of the above technical solution:

[0023] The limiting groove and the limiting block are adapted to each other, and the initial state of the limiting block and the limiting groove is vertically distributed.

[0024] As a further description of the above technical solution:

[0025] A first stop block is fixedly connected to the outer wall of the adjusting rod on the left side close to the torsion spring, a second stop block is fixedly connected to the left side of the circular ring block, and the first stop block and the second stop block are vertically arranged.

[0026] As a further description of the above technical solution:

[0027] One end of the torsion spring is fixedly connected to the inner wall of the circular ring block, the other end of the torsion spring is fixedly connected to the outer wall of the adjusting rod, and the adjusting rod penetrates and is rotatably connected to the middle of the first circular block.

[0028] The present invention has the following beneficial effects:

[0029] 1. In the present invention, by providing a primary buffer assembly and a secondary buffer assembly, the impact force generated during the die pressing process can be effectively absorbed, reducing the rigid collision when the upper template directly contacts the bottom template, improving the safety of the machine operation. More importantly, it avoids the damage of the workpiece caused by the impact, thereby ensuring the quality stability of the product.

[0030] 2. In the present invention, through the triangular block and the connected T-shaped block and extrusion block, during the operation of the die pressing mechanism, through the interaction of the mechanical structure and the second spring, the rapid and accurate centering of the workpiece is achieved. This design eliminates the need for additional manual adjustment or special centering devices in the traditional die pressing process, improving the automation level and efficiency of the entire injection molding process.

[0031] 3. In the present invention, through the ingenious design of the second circular block and the adjusting rod and other components in the adjusting assembly, users can flexibly adjust the initial elasticity and buffering effect of the first spring according to the requirements of different workpieces and material characteristics. This adjustable mechanism not only expands the application range of the die pressing mechanism, but also can better adapt to various injection molding tasks. At the same time, by rotating the adjusting rod and coordinating with the overlapping adjustment of the limiting block and the limiting groove, a simple and easy adjustment method is realized, enhancing the operation convenience and applicability of the device. Description of the Drawings

[0032] Figure 1Schematic diagram of the three-dimensional structure of the overall device of a frame-type die pressing mechanism of an injection molding machine in the present invention;

[0033] Figure 2 Schematic diagram of the left side of the overall device of a frame-type die pressing mechanism of an injection molding machine in the present invention;

[0034] Figure 3 Schematic diagram of the sectional three-dimensional structure of the first sleeve rod of a frame-type die pressing mechanism of an injection molding machine in the present invention.

[0035] Figure 4 Schematic diagram of the three-dimensional structure of the adjusting component of a frame-type die pressing mechanism of an injection molding machine in the present invention.

[0036] Figure 5 Schematic diagram of the three-dimensional structure of the circular ring block of a frame-type die pressing mechanism of an injection molding machine in the present invention.

[0037] Figure 6 Schematic diagram of the three-dimensional structure of the triangular block and the extrusion block of a frame-type die pressing mechanism of an injection molding machine in the present invention.

[0038] Figure 7 Schematic diagram of the split three-dimensional structure of the triangular block and the extrusion block of a frame-type die pressing mechanism of an injection molding machine in the present invention.

[0039] Figure 8 For a frame-type die pressing mechanism of an injection molding machine in the present invention Figure 2 Enlarged schematic diagram of part A.

[0040] Legend description:

[0041] 1. Die pressing device; 2. Support plate; 3. Buffer mechanism; 31. Groove; 32. Rotating block; 33. Sphere; 35. Second sleeve rod; 36. First sleeve rod; 4. U-shaped block; 5. Track block; 6. Bottom template; 7. Centering component; 71. Extrusion block; 72. T-shaped block; 73. T-shaped groove; 74. Second spring; 75. Triangular block; 81. First spring; 83. Ejector rod; 84. First round block; 91. Circular ring block; 92. First stop block; 93. Adjusting rod; 94. Limit block; 95. Second round block; 96. Torsion spring; 97. Limit groove; 98. Second stop block. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] Refer to Figure 1 -Figure 3 , an embodiment provided by the present invention: a frame-type die pressing mechanism for an injection molding machine, including a die pressing device 1. The die pressing device 1 is the die pressing mechanism of the injection molding machine and is a key part in the injection molding process. It is mainly responsible for pressing the molten plastic material into the mold cavity to form the required plastic products. The working principle and structure of the die pressing mechanism are relatively complex and consist of multiple parts, mainly including a mold closing system, an injection system, a hydraulic transmission system, and an electrical control system. And this technology is prior art. Since it is prior art and can be implemented by those skilled in the art, it will not be described in detail in this case. A bottom template 6 is arranged inside the die pressing device 1, and a track block 5 is fixedly connected to the top of the die pressing device 1. A support plate 2 is fixedly connected to the right side of the track block 5 near the top of the die pressing device 1. The support plate 2 is used to support the U-shaped block 4. The U-shaped block 4 is slidably connected to the top of the track block 5, and the U-shaped block 4 can slide horizontally on the track block 5. A buffer mechanism 3 is arranged inside the U-shaped block 4.

[0044] Refer to Figure 1 - Figure 3 , further, the buffer mechanism 3 is mainly used to buffer the pressure generated during the die pressing process, thereby increasing safety. The buffer mechanism 3 includes a primary buffer component, a secondary buffer component, and an adjustment component. Through the cooperation of the primary buffer component and the secondary buffer component, the die pressing process can be buffered to a great extent. The primary buffer component includes a sleeve rod 36. The sleeve rod 36 is rotatably connected to the inner wall of the U-shaped block 4. A sleeve rod 35 is slidably connected to the inner wall of the sleeve rod 36. A rotating block 32 is rotatably connected to the left side of the sleeve rod 35. A spherical ball 33 is fixedly connected to the outer wall of the rotating block 32. A groove 31 is formed in the inner wall of the sleeve rod 36, and the spherical ball 33 is adapted to the groove 31.

[0045] Refer to Figure 3 - Figure 5 , the secondary buffer component includes a circular block 84. The circular block 84 is slidably connected to the inner wall of the sleeve rod 36. The circular block 84 and the sleeve rod 36 are elastically connected by a spring 81. The reverse acting force of the spring 81 can further improve the buffer effect. One end of the spring 81 is fixedly connected to the inner wall of the sleeve rod 36, and the other end of the spring 81 is fixedly connected to the left side of the circular block 84. A top rod 83 is fixedly connected to the left side of the rotating block 32. The groove 31 is arranged in a spiral shape, and the spherical ball 33 slides inside the groove 31. The spherical ball 33 can slide along the track of the groove 31, and when the spherical ball 33 slides, the rotating block 32 will rotate together. Since the rotating block 32 and the sleeve rod 35 are rotatably connected, there will be no movement interference. A centering component 7 for centering the workpiece is arranged inside the die pressing device 1.

[0046] Refer to Figure 3 - Figure 5 And Figure 8, the adjusting component includes a second round block 95. A adjusting rod 93 is rotatably connected to the left side of the second round block 95. The adjusting rod 93 passes through the first sleeve rod 36. The adjusting rod 93 can slide and rotate on the left part of the first sleeve rod 36. A ring block 91 is fixedly connected to the left side of the second round block 95. The adjusting rod 93 and the ring block 91 are elastically connected by a torsion spring 96. The reverse acting force of the torsion spring 96 assists the adjusting rod 93 to reset, so that the limiting block 94 and the limiting groove 97 do not overlap. One end of the torsion spring 96 is fixedly connected to the inner wall of the ring block 91, and the other end of the torsion spring 96 is fixedly connected to the outer wall of the adjusting rod 93. The middle part of the adjusting rod 93 passes through and is fixedly connected with two limiting blocks 94. A first stop block 92 is fixedly connected to the outer wall of the adjusting rod 93 near the left side of the torsion spring 96. A second stop block 98 is fixedly connected to the left side of the ring block 91. The first stop block 92 and the second stop block 98 are vertically arranged. When the first stop block 92 rotates with the adjusting rod 93 and contacts the second stop block 98, it cannot rotate further. And at this time, the limiting block 94 just overlaps with the limiting groove 97. Then the adjusting rod 93 can be pulled. A limiting groove 97 is opened on the left part of the first sleeve rod 36. The limiting groove 97 and the limiting block 94 are adapted to each other, and the initial state of the limiting groove 97 and the limiting block 94 is vertically distributed.

[0047] Refer to Figure 1 , Figure 6 , Figure 7 , the centering component 7 includes a triangular block 75. The triangular block 75 is triangular in shape, and has an inclined surface on the side close to the workpiece. The triangular block 75 is fixedly connected inside the die pressing device 1. A T-shaped groove 73 is opened on the front surface of the triangular block 75. A T-shaped block 72 is slidably connected to the inner wall of the T-shaped groove 73. The T-shaped block 72 and the triangular block 75 are elastically connected by a second spring 74. The reverse acting force of the second spring 74 assists the extrusion block 71 to reset, so as to facilitate the next processing. One end of the second spring 74 is fixedly connected to the inner wall of the T-shaped groove 73, and the other end of the second spring 74 is fixedly connected to the right side of the T-shaped block 72. An extrusion block 71 is fixedly connected to the front surface of the T-shaped block 72. There are four groups of U-shaped blocks 4, and the other two groups of U-shaped blocks 4 are fixedly connected to the top of the support plate 2. The right side of the second sleeve rod 35 is rotatably connected to the inner walls of the other two groups of U-shaped blocks 4.

[0048] Working principle: When in use, first place the workpiece to be processed on the extrusion block 71, and then start the die pressing device 1. The die pressing device 1 moves the upper template towards the bottom template 6 and extrudes the workpiece. When the upper template moves, it will drive the support plate 2 to move, and the support plate 2 drives the U-shaped block 4 to move. Since the second sleeve rod 35 is rotatably connected to the inner wall of the U-shaped block 4, when the support plate 2 moves, it will drive the second sleeve rod 35 to move and cause the second sleeve rod 35 to rotate. When the second sleeve rod 35 moves, since the rotating block 32 and the second sleeve rod 35 are rotatably connected, and the spherical ball 33 slides inside the groove 31, when the second sleeve rod 35 moves, the rotating block 32 will rotate and the spherical ball 33 will continuously slide inside the groove 31, increasing the movement stroke, thereby playing a buffering role. And because the first sleeve rod 36 is under pressure when the second sleeve rod 35 moves, and in addition, the U-shaped block 4 is slidably connected to the top of the track block 5, when the second sleeve rod 35 moves, the two U-shaped blocks 4 will move towards the middle on the track block 5. When the rotating block 32 moves to the left, it will also drive the ejector rod 83 to move together. When the ejector rod 83 moves and contacts the second round block 95, it will extrude the second round block 95, causing the second round block 95 to move to the left. The second round block 95 moving to the left drives the ring block 91 to move, and when the second round block 95 moves, it will drive the adjusting rod 93 to move together. The adjusting rod 93 drives the first round block 84 to move. Since the first round block 84 and the first sleeve rod 36 are elastically connected by the first spring 81, when the first round block 84 moves to the left, it will compress the first spring 81, and play a buffering role through the reverse acting force of the first spring 81.

[0049] When it is necessary to adjust the spring elasticity of the first spring 81, at the initial work, first rotate the adjusting rod 93. When the adjusting rod 93 rotates, it will drive the limiting block 94 and the first stop block 92 to move together. When the first stop block 92 moves until it contacts the second stop block 98, it cannot continue to rotate. And when the adjusting rod 93 rotates, it will compress the torsion spring 96. And when the first stop block 92 rotates and contacts the second stop block 98, the limiting block 94 just coincides with the limiting groove 97. At this time, the adjusting rod 93 can be pulled outwards. When the adjusting rod 93 is pulled outwards, it will compress the first spring 81, thereby adjusting the initial elasticity of the first spring 81. When the other limiting block 94 is pulled out of the limiting groove 97 and the adjusting rod 93 is slowly released, at this time, the reverse acting force of the torsion spring 96 assists the adjusting rod 93 to reset, so that the limiting block 94 does not overlap with the limiting groove 97, thereby achieving the purpose of limiting.

[0050] When the triangular block 75 moves leftward following the upper template, the extrusion block 71 will contact the bottom template 6. Since the triangular block 75 is set to be triangular, and the T-shaped block 72 is slidably connected to the inner wall of the T-shaped groove 73, and the T-shaped block 72 and the extrusion block 71 are fixedly connected, the extrusion block 71 will be subjected to pressure, causing the T-shaped block 72 to slide in the T-shaped groove 73, and shrink inward as the inclination angle of the triangular block 75 decreases. Moreover, when the T-shaped block 72 moves, it will also compress the second spring 74. At this time, the four extrusion blocks 71 move toward the middle simultaneously, enabling the workpiece to be quickly centered. After the injection molding is completed, the reverse acting force of the second spring 74 assists the extrusion block 71 to reset.

[0051] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An injection molding machine frame type die pressing mechanism, comprising: A die pressing device (1): mainly responsible for pressing the molten plastic material into the mold cavity to form the required plastic products; A bottom template (6): mainly used to cooperate with the die pressing device (1) for mold closing work; A buffer mechanism (3): mainly used to buffer the pressure generated during the die pressing process; It is characterized in that: a track block (5) is fixedly connected to the top of the die pressing device (1), a support plate (2) is fixedly connected to the right side of the track block (5) near the top of the die pressing device (1), a U-shaped block (4) is slidably connected to the top of the track block (5), a buffer mechanism (3) is arranged inside the U-shaped block (4), the buffer mechanism (3) includes a primary buffer component, a secondary buffer component and an adjustment component, the primary buffer component includes a sleeve rod one (36), the sleeve rod one (36) is rotatably connected to the inner wall of the U-shaped block (4), a sleeve rod two (35) is slidably connected to the inner wall of the sleeve rod one (36), a rotating block (32) is rotatably connected to the left side of the sleeve rod two (35), a push rod (83) is fixedly connected to the left side of the rotating block (32), the secondary buffer component includes a round block one (84), the round block one (84) is slidably connected to the inner wall of the sleeve rod one (36), the round block one (84) and the sleeve rod one (36) are elastically connected by a spring one (81), the adjustment component includes a round block two (95), a regulating rod (93) is rotatably connected to the left side of the round block two (95), a ring block (91) is fixedly connected to the left side of the round block two (95), the regulating rod (93) and the ring block (91) are elastically connected by a torsion spring (96), two limiting blocks (94) are arranged through and fixedly connected to the middle of the regulating rod (93), and a limiting groove (97) is arranged on the left part of the sleeve rod one (36).

2. The frame type die pressing mechanism of an injection molding machine according to claim 1, characterized in that: A spherical ball (33) is fixedly connected to the outer wall of the rotating block (32), a groove (31) is arranged on the inner wall of the sleeve rod one (36), the bottom template (6) is arranged inside the die pressing device (1), one end of the spring one (81) is fixedly connected to the inner wall of the sleeve rod one (36), the other end of the spring one (81) is fixedly connected to the left side of the round block one (84), and the regulating rod (93) penetrates through the sleeve rod one (36).

3. The frame type die pressing mechanism of an injection molding machine according to claim 1, characterized in that: A centering component (7) is arranged inside the die pressing device (1).

4. A frame-type die pressing mechanism of an injection molding machine according to claim 3, characterized in that: The centering component (7) includes a triangular block (75), the triangular block (75) is fixedly connected to the inside of the die pressing device (1), a T-shaped groove (73) is arranged on the front surface of the triangular block (75), and a T-shaped block (72) is slidably connected to the inner wall of the T-shaped groove (73).

5. The frame type die pressing mechanism of an injection molding machine according to claim 4, characterized in that: The T-shaped block (72) and the triangular block (75) are elastically connected by a spring two (74), one end of the spring two (74) is fixedly connected to the inner wall of the T-shaped groove (73), and the other end of the spring two (74) is fixedly connected to the right side of the T-shaped block (72).

6. The frame-type die pressing mechanism of an injection molding machine according to claim 4, characterized in that: The front surface of the T-shaped block (72) is fixedly connected with an extrusion block (71). Four groups of U-shaped blocks (4) are provided, and the other two groups of U-shaped blocks (4) are fixedly connected to the top end of the support plate (2). The right side of the second sleeve rod (35) is rotatably connected to the inner walls of the other two groups of U-shaped blocks (4).

7. The frame type die pressing mechanism of an injection molding machine according to claim 2, characterized in that: The groove (31) is arranged in a spiral shape, and the spherical ball (33) slides inside the groove (31).

8. The frame type die pressing mechanism of an injection molding machine according to claim 1, wherein: The limiting groove (97) and the limiting block (94) are adapted to each other, and the initial state of the limiting block (94) and the limiting groove (97) is vertically distributed.

9. The frame-type die pressing mechanism of an injection molding machine according to claim 1, characterized in that: A first stopper (92) is fixedly connected to the outer wall of the adjusting rod (93) near the left side of the torsion spring (96). A second stopper (98) is fixedly connected to the left side of the circular ring block (91). The first stopper (92) and the second stopper (98) are vertically arranged.

10. The frame type die pressing mechanism of an injection molding machine according to claim 1, characterized in that: One end of the torsion spring (96) is fixedly connected to the inner wall of the circular ring block (91), and the other end of the torsion spring (96) is fixedly connected to the outer wall of the adjusting rod (93). The adjusting rod (93) penetrates and is rotatably connected to the middle of the first circular block (84).

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