Injection molding machine mold positioning and locking device capable of quickly changing mold

Abstract

The invention discloses an injection molding machine mold positioning and locking device capable of quickly changing a mold, and aims to solve the problems of long mold changing time, high mold changing cost and the like in the existing mold changing process. According to the technical scheme, the injection molding machine mold positioning and locking device capable of rapidly changing the mold is characterized by comprising a mold plate and the mold, a cavity is formed in the mold plate, four sliding plates are arranged in the cavity and penetrate through the mold plate, the four sliding plates are symmetrically distributed at the four corners of the mold plate in pairs, and through grooves allowing the sliding plates to slide are formed in the mold plate; mounting plates are symmetrically arranged on the two sides of the mold. According to the injection molding machine mold positioning and locking device capable of rapidly replacing the mold, the driving mechanism drives the four sliding plates and the clamping plates to synchronously move, rapid clamping and loosening of the mold are achieved, compared with a traditional bolt fastening mode, the mold replacing time is greatly shortened, the clamping force of the four clamping plates is evenly distributed, and the mold replacing efficiency is improved. And the stability of the mold in the injection molding process can be effectively guaranteed, and the defective rate caused by mold shaking is reduced.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and more specifically, to a mold positioning and locking device for injection molding machines with quick mold change capability. Background Technology

[0002] Injection molding is a widely used industrial molding method. Its basic principle involves heating plastic or rubber raw materials to a molten state, then using high pressure to precisely inject this molten material into a pre-designed mold cavity. After the material cools and solidifies within the mold for an appropriate time, the mold is opened to obtain an injection-molded product with a specific shape, size, and properties. Since the final shape of the product is entirely determined by the shape of the mold, when a company needs to switch to producing different types of products, it must change the mold installed on the injection molding machine accordingly.

[0003] In traditional mold changing and fixing methods, bolt fastening is a common approach. However, it suffers from problems such as long mold changing times, complex operation, and reliance on manual tightening torque for stability. To address these issues, the industry has gradually developed several rapid mold changing technologies, such as magnetic template technology. Magnetic templates use electromagnetic or permanent magnet forces to quickly attract and fix the mold, significantly shortening changeover time and improving production efficiency. However, magnetic template technology is costly, making it unaffordable for some small and medium-sized enterprises, thus limiting its widespread application. Therefore, in the injection molding field, there is an urgent need to develop a low-cost, highly stable mold positioning and locking device capable of rapid mold changing to meet the industry's practical needs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a mold positioning and locking device for injection molding machines that enables rapid mold changes. By driving the synchronous movement of four sliding plates and clamping plates through a drive mechanism, the mold can be quickly clamped and released. Compared with the traditional bolt fastening method, this greatly shortens the mold change time. The clamping force of the four clamping plates is evenly distributed, which can effectively ensure the stability of the mold during the injection molding process and reduce the defect rate caused by mold shaking.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a quick-change injection molding machine mold positioning and locking device, comprising a template and a mold, wherein the template has a cavity inside, and four sliding plates are arranged in the cavity, the four sliding plates all penetrate the template and are symmetrically distributed in pairs at the four corners of the template, the template has through grooves for the sliding plates to slide, mounting plates are symmetrically arranged on both sides of the mold, and a channel is formed between the upper and lower sets of sliding plates for the mounting plates to slide into, a clamping plate is provided at the end of the sliding plate outside the template, and a driving mechanism is provided in the cavity, the driving mechanism being used to drive the sliding plate to slide, so as to drive the clamping plate to press against the mounting plate.

[0006] The present invention is further configured such that: the driving mechanism includes a bidirectional ball screw rotatably connected in the cavity; driving blocks are symmetrically arranged at both ends of the bidirectional ball screw; a first connecting plate is arranged between each of the two opposing sliding plates; an elastic element is arranged between the first connecting plate and the inner wall of the cavity; a second connecting plate is symmetrically arranged between the two first connecting plates; a first wedge is arranged on the side of the driving block near the second connecting plate; a second wedge is arranged on the second connecting plate; the inclined surface of the second wedge abuts against the inclined surface of the first wedge; and a driving part for driving its rotation is connected to the bidirectional ball screw.

[0007] The present invention is further configured such that: the driving unit includes an operation box disposed on the template, one end of the bidirectional ball screw extends to the operation box and is coaxially fixed with a worm gear, a meshing worm is disposed on one side of the worm gear, the worm is rotatably connected to the inner wall of the operation box, and an operation handwheel located outside the operation box is coaxially fixed on the worm.

[0008] The present invention is further configured such that: a plurality of card protrusions are evenly spaced on the clamping plate, and card grooves adapted to the card protrusions are provided on the mounting plate.

[0009] The present invention is further configured such that: a limiting plate is provided at the rear end of the channel sliding in, one end of the limiting plate is fixedly connected to the template, and a limiting groove is provided on the mounting plate for the limiting plate to be inserted.

[0010] The present invention is further configured such that: through holes are symmetrically opened at both ends of the second connecting plate, and a positioning rod is slidably inserted through the through holes, and the positioning rod is fixedly connected to the inner wall of the cavity.

[0011] In summary, the present invention has the following beneficial effects:

[0012] 1. The synchronous movement of four slide plates and clamping plates driven by the drive mechanism enables the mold to be clamped and released quickly. Compared with the traditional bolt fastening method, it greatly shortens the mold change time. The clamping force of the four clamping plates is evenly distributed, which can effectively ensure the stability of the mold during the injection molding process and reduce the defect rate caused by mold shaking.

[0013] 2. Compared with magnetic template technology, it reduces the equipment investment cost for enterprises, and is especially suitable for small and medium-sized enterprises. It meets the actual needs of the injection molding industry for a mold positioning and locking device that is low in cost, highly stable and can achieve quick mold change. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the template, mold, slide plate, and mounting plate of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the driving mechanism of the present invention;

[0016] Figure 3 This is a schematic diagram of the planar structure of the drive mechanism of the present invention;

[0017] Figure 4 This is a schematic diagram of the limiting plate of the present invention.

[0018] In the diagram: 1. Template; 2. Mold; 3. Cavity; 4. Slide plate; 5. Mounting plate; 6. Clamping plate; 7. Bidirectional ball screw; 8. Drive block; 9. First connecting plate; 10. Elastic element; 11. Second connecting plate; 12. First wedge; 13. Second wedge; 14. Operation box; 15. Worm gear; 16. Worm; 17. Operation handwheel; 18. Locking protrusion; 19. Limiting plate; 20. Positioning rod. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0020] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] Reference Figures 1-4 A quick-change injection molding machine mold positioning and locking device includes a template 1 and a mold 2. The template 1 has a cavity 3 inside, and four sliding plates 4 are arranged in the cavity 3. The four sliding plates 4 all pass through the template 1 and are symmetrically distributed in pairs at the four corners of the template 1. The template 1 has through grooves for the sliding plates 4 to slide. Mounting plates 5 are symmetrically fixed on both sides of the mold 2. A channel is formed between the upper and lower sets of sliding plates 4 for the mounting plates 5 to slide into. A clamping plate 6 is fixed at one end of the sliding plate 4 outside the template 1. A driving mechanism is arranged in the cavity 3. The driving mechanism is used to drive the sliding plates 4 to slide, so as to drive the clamping plate 6 to press against the mounting plate 5.

[0024] The drive mechanism includes a bidirectional ball screw 7 rotatably connected in the cavity 3. Drive blocks 8 are symmetrically arranged at both ends of the bidirectional ball screw 7. A first connecting plate 9 is fixed between two opposing slide plates 4. An elastic element 10 is arranged between the first connecting plate 9 and the inner wall of the cavity 3. A second connecting plate 11 is symmetrically fixed between the two first connecting plates 9. A first wedge block 12 is fixed on the side of the drive block 8 near the second connecting plate 11. A second wedge block 13 is fixed on the second connecting plate 11. The inclined surface of the second wedge block 13 abuts against the inclined surface of the first wedge block 12. A drive unit for driving its rotation is connected to the bidirectional ball screw 7.

[0025] The drive unit includes an operation box 14 fixed on the template 1. One end of the bidirectional ball screw 7 extends to the operation box 14 and is coaxially fixed with a worm gear 15. A meshing worm 16 is provided on one side of the worm gear 15. The worm 16 is rotatably connected to the inner wall of the operation box 14, and an operation handwheel 17 located outside the operation box 14 is coaxially fixed on the worm 16.

[0026] Additionally, a number of locking protrusions 18 are evenly spaced on the clamping plate 6, and the mounting plate 5 is provided with locking grooves that are adapted to the locking protrusions 18. In this embodiment, the locking protrusions 18 adopt a triangular cross-section structure, and the corresponding locking grooves are opened with a matching shape. The cooperation between the locking protrusions 18 and the locking grooves can increase the friction and mechanical connection strength between the clamping plate 6 and the mounting plate 5, forming a mechanical interlock in the horizontal direction to prevent the mold 2 from sliding relative to the template 1, and further enhance the stability of the mold 2 installation.

[0027] A limiting plate 19 is provided at the rear end of the channel. One end of the limiting plate 19 is fixedly connected to the template 1. The mounting plate 5 has a limiting groove for the limiting plate 19 to be inserted. The limiting plate 19 provides a reference for the sliding position of the mounting plate 5 in the channel, so that the locking protrusion 18 on the clamping plate 6 can be aligned with the locking groove on the mounting plate 5, avoiding the situation where the locking protrusion 18 cannot be inserted into the locking groove smoothly during the subsequent clamping process.

[0028] The second connecting plate 11 has symmetrical through holes at both ends, and a positioning rod 20 slides through the through holes. The positioning rod 20 is fixedly connected to the inner wall of the cavity 3. The second connecting plate 11 and the first connecting plate 9 as a whole not only limit and guide their linear movement through the slide plate 4 and the slide groove, but the added positioning rod 20 can further increase the linear limiting effect of the second connecting plate 11 and the first connecting plate 9 as a whole, making the movement of the slide plate 4 more stable and accurate.

[0029] Working principle: During the injection molding process, when mold 2 needs to be replaced, the operator first operates the drive mechanism to release the clamping plate 6 from the clamping action of the mounting plate 5. At this time, the mold 2 to be replaced can be freely pulled out from between the two sets of sliding plates 4. Then, the new mold 2 is aligned with the channel formed between the upper and lower sets of sliding plates 4 and slid in, so that the mounting plates 5 on both sides of the mold 2 are in the appropriate position. The drive mechanism is operated again to clamp the mounting plate 5 between it and the template 1. Under the function of the drive mechanism, the clamping plate 6 maintains this clamping position, which facilitates the stable use of the mold 2 in the subsequent injection molding process.

[0030] The specific implementation of the drive mechanism is as follows: the bidirectional ball screw 7 is driven to rotate by the drive unit. Since the threads at both ends of the bidirectional ball screw 7 are opposite, and the ball screw has high transmission accuracy and high transmission efficiency, under the action of the threads, the two drive blocks 8 can move synchronously towards each other along the bidirectional ball screw 7. The first wedge block 12 moves synchronously with the drive blocks 8 and pushes the second wedge block 13. The second wedge block 13 drives the slide plate 4 to move inward through the second connecting plate 11 and the first connecting plate 9, thereby driving the four clamping plates 6 to clamp the mounting plate 5 synchronously. The clamping force of each clamping plate 6 is evenly distributed, which can effectively ensure the stability of the mold 2 during the injection molding process and reduce the defect rate caused by the shaking of the mold 2. When it is necessary to release the clamping, the bidirectional ball screw 7 is rotated in the reverse direction, and the two driving blocks 8 move with the first wedge 12 in a direction away from each other. The first wedge 12 no longer pushes the second wedge 13, and the first connecting plate 9, the second connecting plate 11 and the slide plate 4 as a whole are no longer pushed. Thus, under the elastic recovery action of the elastic element 10, they move back to the initial position, and the clamping plate 6 disengages from the mounting plate 5.

[0031] The specific implementation of the drive unit is as follows: the worker drives the worm 16 to rotate by operating the handwheel 17. The worm 16 drives the worm wheel 15 to rotate, which in turn drives the coaxially fixed bidirectional ball screw 7 to rotate. The worm 16 and the worm wheel 15 have a self-locking function, that is, when the rotation of the worm 16 stops, the worm wheel 15 cannot push the worm 16 to rotate in the opposite direction, thereby keeping the clamping plate 6 in the clamping position, which facilitates the stable use of the mold 2 in the subsequent injection molding process.

[0032] The synchronous movement of four sliding plates 4 and clamping plates 6 driven by the drive mechanism enables the mold 2 to be quickly clamped and released. Compared with the traditional bolt fastening method, it greatly shortens the mold change time. The clamping force of the four clamping plates 6 is evenly distributed, which can effectively ensure the stability of the mold 2 during the injection molding process and reduce the defect rate caused by the shaking of the mold 2. Compared with the magnetic template 1 technology, it reduces the equipment investment cost of enterprises, and is especially suitable for small and medium-sized enterprises. It meets the actual needs of the injection molding field for a mold 2 positioning and locking device that is low-cost, highly stable and can achieve rapid mold change.

[0033] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A quick-change injection molding machine mold positioning and locking device, comprising a template (1) and a mold (2), characterized in that: The template (1) has a cavity (3) inside, and four sliding plates (4) are arranged in the cavity (3). The four sliding plates (4) all penetrate the template (1) and are symmetrically distributed in pairs at the four corners of the template (1). The template (1) has a through groove for the sliding plates (4) to slide. The mold (2) has mounting plates (5) symmetrically arranged on both sides. A channel is formed between the upper and lower sets of sliding plates (4) for the mounting plates (5) to slide into. A clamping plate (6) is provided at the end of the sliding plate (4) outside the template (1). A driving mechanism is provided in the cavity (3). The driving mechanism is used to drive the sliding plate (4) to slide, so as to drive the clamping plate (6) to press against the mounting plate (5).

2. The injection molding machine mold positioning and locking device with quick mold change capability according to claim 1, characterized in that: The driving mechanism includes a bidirectional ball screw (7) rotatably connected in the cavity (3). The two ends of the bidirectional ball screw (7) are symmetrically provided with driving blocks (8). A first connecting plate (9) is provided between each of the two opposing slide plates (4). An elastic element (10) is provided between the first connecting plate (9) and the inner wall of the cavity (3). A second connecting plate (11) is symmetrically provided between the two first connecting plates (9). A first wedge (12) is provided on the side of the driving block (8) near the second connecting plate (11). A second wedge (13) is provided on the second connecting plate (11). The inclined surface of the second wedge (13) abuts against the inclined surface of the first wedge (12). A driving part for driving its rotation is connected to the bidirectional ball screw (7).

3. The injection molding machine mold positioning and locking device with quick mold change capability according to claim 2, characterized in that: The drive unit includes an operation box (14) mounted on the template (1). One end of the bidirectional ball screw (7) extends to the operation box (14) and is coaxially fixed with a worm gear (15). A meshing worm (16) is provided on one side of the worm gear (15). The worm (16) is rotatably connected to the inner wall of the operation box (14), and an operation handwheel (17) located outside the operation box (14) is coaxially fixed on the worm (16).

4. The injection molding machine mold positioning and locking device with quick mold change capability according to claim 1, characterized in that: The clamping plate (6) is provided with a number of card protrusions (18) evenly spaced apart, and the mounting plate (5) is provided with card slots that are compatible with the card protrusions (18).

5. The injection molding machine mold positioning and locking device with quick mold change capability according to claim 4, characterized in that: A limiting plate (19) is provided at the rear end of the channel. One end of the limiting plate (19) is fixedly connected to the template (1). A limiting groove is provided on the mounting plate (5) for the limiting plate (19) to be inserted.

6. The injection molding machine mold positioning and locking device with quick mold change capability according to claim 1, characterized in that: The second connecting plate (11) has symmetrical through holes at both ends, and a positioning rod (20) slides through the through holes. The positioning rod (20) is fixedly connected to the inner wall of the cavity (3).

Images