Mold locking assembly of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, and discloses a mold locking assembly of an injection molding machine, which comprises a hydraulic cylinder, a push rod is slidably arranged at one end of the hydraulic cylinder, guide rods are fixedly connected to four corners of one end, close to the push rod, of the hydraulic cylinder, and a mold mechanism for injection molding is arranged on the guide rods; the mold mechanism comprises a fixed mold and a movable mold, and the ends, away from the hydraulic cylinder, of the four guide rods are fixedly connected to the four corners of the end, close to the hydraulic cylinder, of the fixed mold correspondingly. According to the utility model, through the structures of the sliding rod, the buffer strip and the like, when the hydraulic cylinder pushes the movable die to the fixed die through the push rod, the fixed die and the movable die can play a certain buffer protection role after being in contact due to the elastic telescopic performance of the spring I and the spring II; therefore, damage to the die caused by rigid extrusion collision between the movable die and the fixed die or the push rod is avoided, and the service life of the die is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding machines, and in particular relates to a mold locking component of an injection molding machine. Background Art

[0002] The injection molding machine uses the thrust of the screw (or plunger) to inject the plasticized molten state (i.e. viscous flow state) plastic into the closed mold cavity, and obtains the product after solidification. Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding--melting plasticization--pressure injection--mold filling cooling--mold opening and taking out the parts. After taking out the plastic parts, the mold is closed again for the next cycle.

[0003] The clamping mechanism is one of the main components of the injection molding machine. The existing clamping mechanism is mainly a hydraulic cylinder pressurized clamping mechanism with many parts and difficult processing. During use, the upper and lower connecting rods often wear inconsistently, which makes the clamping unbalanced and may cause mold expansion during mold closing and injection molding. In addition, there is no buffer component between the existing molds, which may cause rigid extrusion between the molds or between the mold and the push rod when closing the mold, which may cause damage to the mold and affect the service life of the mold.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A clamping assembly of an injection molding machine comprises a hydraulic cylinder, a push rod is slidably arranged at one end of the hydraulic cylinder, guide rods are fixedly connected at four corner positions of the hydraulic cylinder near one end of the push rod, and a mold mechanism for injection molding is arranged on the guide rod;

[0007] The mold mechanism includes a fixed mold and a movable mold. Four guide rods are fixedly connected to the four corner positions of the fixed mold near the hydraulic cylinder at one end away from the hydraulic cylinder, and the movable mold is arranged between the fixed mold and the hydraulic cylinder. The guide rods penetrate the four corner positions between the two ends of the movable mold and are connected in a sliding fit. The fixed mold and the movable mold are snap-fitted together, and a buckle assembly for locking is also arranged between the fixed mold and the movable mold.

[0008] As a preferred embodiment of the utility model, mounting seats are provided at the middle positions around the movable mold, and the buckle assembly includes lock buckles, which are rotatably installed on the mounting seats one by one, and torsion springs are installed between the lock buckles and the mounting seats. The cross-section of the lock buckles is bent with both ends raised outward.

[0009] As a preferred embodiment of the utility model, the buckle assembly also includes a buckle slot, which is correspondingly arranged at the outer position around the fixed mold away from the end of the movable mold, and the buckle slot is buckled with the end of the lock close to the fixed mold.

[0010] As a preferred embodiment of the utility model, a fixed plate is fixedly connected to the outer side of the push rod near the movable mold, and a pressing plate is fixedly connected to the side walls of the fixed plate in a one-to-one correspondence with the lock buckle, and the end of the pressing plate away from the fixed plate is in contact with the inner side of the end of the lock buckle close to the pressing plate.

[0011] As a preferred embodiment of the utility model, a sliding groove is provided at one end of the push rod close to the movable mold, a sliding rod is slidably installed between the inner walls of the sliding groove, and one end of the sliding rod close to the movable mold is fixedly connected to the center position of one end of the movable mold close to the push rod, and a spring is provided on the outer side of the circumference of the sliding rod between the movable mold and the push rod.

[0012] As a preferred embodiment of the utility model, the fixed mold is provided with installation grooves around one end close to the movable mold, and a buffer strip is slidably installed between the inner walls of the circumference of each installation groove.

[0013] As a preferred embodiment of the present utility model, mounting holes are provided at both ends of the inner wall of the mounting groove away from the buffer bar, mounting rods are fixedly connected at the end of the buffer bar close to the mounting hole and at the corresponding positions of the mounting holes, the end of the mounting rod away from the buffer bar is slidably connected between the inner walls of the mounting hole in a one-to-one manner, and a spring 2 is provided between the inner wall of the end of the mounting hole away from the buffer bar and the end of the mounting rod away from the buffer bar.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Through the structures such as the slide bar and the buffer strip, when the hydraulic cylinder pushes the movable mold toward the fixed mold through the push rod, the elastic expansion and contraction performance of the spring 1 and the spring 2 enables the fixed mold to play a certain buffering and protective role after contacting the movable mold, thereby avoiding the rigid extrusion collision between the movable mold and the fixed mold or the push rod, which may cause damage to the mold, thereby improving the service life of the mold.

[0016] 2. After the movable mold is pushed toward the fixed mold, the push rod continues to push, and the extrusion spring is compressed, so that the pressure sheet approaches the lock buckle, and the bent lock buckle is pushed by the pressure sheet to clamp the fixed mold close to one end, until the lock buckle close to the fixed mold is buckled into the card slot to form a limit locking effect on the fixed mold and the movable mold, thereby ensuring the stability of the device. When unlocking, the push rod is retracted until the pressure sheet is disengaged from the lock buckle, so that the lock buckle is reset under the action of the torsion spring, so that the lock buckle exits the card slot to release the locking effect. The setting of the buckle mechanism is not only simple in structure, but also convenient in loosening and locking, which is conducive to improving the overall efficiency of the device.

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 For the utility model Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the fixed mold of the utility model.

[0024] In the figure: 10, hydraulic cylinder; 11, push rod; 12, slide groove; 13, slide rod; 14, spring one; 21, fixed mold; 22, movable mold; 23, slot; 24, mounting slot; 25, mounting hole; 30, guide rod; 40, lock; 50, fixed plate; 51, pressing piece; 60, buffer strip; 61, mounting rod; 62, spring two. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0026] A clamping assembly for an injection molding machine, such as Figure 1-2 As shown, it includes a hydraulic cylinder 10, a push rod 11 is slidably provided at one end of the hydraulic cylinder 10, and guide rods 30 are fixedly connected at four corner positions of one end of the hydraulic cylinder 10 close to the push rod 11, and a mold mechanism for injection molding is provided on the guide rod 30;

[0027] like Figure 2 As shown, the mold mechanism includes a fixed mold 21 and a movable mold 22, four guide rods 30 are fixedly connected to the four corner positions of the fixed mold 21 close to the hydraulic cylinder 10 at one end away from the hydraulic cylinder 10, and the movable mold 22 is arranged between the fixed mold 21 and the hydraulic cylinder 10, the guide rods 30 penetrate the four corner positions between the two ends of the movable mold 22 and are connected in a sliding fit, the fixed mold 21 and the movable mold 22 are snap-fitted, and a buckle assembly for locking is also arranged between the fixed mold 21 and the movable mold 22.

[0028] like Figure 2 As shown, mounting seats are provided at the middle positions around the movable mold 22, and the buckle assembly includes lock buckles 40, which are rotatably installed on the mounting seats one by one, and torsion springs are installed between the lock buckles 40 and the mounting seats. The cross-section of the lock buckles 40 is bent with both ends tilted outward.

[0029] like Figure 2-3 As shown, the buckle assembly also includes a buckle slot 23, which is correspondingly arranged at the outer position around the end of the fixed mold 21 away from the movable mold 22, and the buckle slot 23 is buckled and matched with the end of the lock buckle 40 close to the fixed mold 21.

[0030] like Figure 2 As shown, a fixing plate 50 is fixedly connected to one end of the push rod 11 near the movable mold 22, and a pressing plate 51 is fixedly connected to the side walls of the fixing plate 50 and the lock buckle 40 in a one-to-one correspondence, and the pressing plate 51 is in contact with the inner side of the end of the lock buckle 40 near the pressing plate 51 away from the fixing plate 50.

[0031] Its function is that after the movable mold 22 is pushed toward the fixed mold 21, the push rod 11 continues to push, and the extrusion spring 14 is compressed, so that the pressing piece 51 is close to the lock buckle 40, and the bent lock buckle 40 is pushed by the pressing piece 51 to clamp one end of the fixed mold 21 to the fixed mold 21, until the lock buckle 40 is close to the fixed mold 21 and buckled into the card slot 23 to form a limit locking effect on the fixed mold 21 and the movable mold 22, thereby ensuring the stability of the device. When unlocking, the push rod 11 is recovered to the pressing piece 51 to disengage the lock buckle 40, so that the lock buckle 40 is reset under the action of the torsion spring, so that the lock buckle 40 exits the card slot 23 to release the locking effect. The setting of the buckle mechanism is not only simple in structure, but also convenient in loosening and locking, which is conducive to improving the overall efficiency of the device.

[0032] like Figure 2 , Figure 4 As shown, a slide groove 12 is provided at one end of the push rod 11 close to the movable mold 22, a slide rod 13 is slidably installed between the inner walls of the slide groove 12, and the end of the slide rod 13 close to the movable mold 22 is fixedly connected to the center position of the end of the movable mold 22 close to the push rod 11, and a spring 14 is provided on the outer side of the circumference of the slide rod 13 between the movable mold 22 and the push rod 11.

[0033] like Figure 5 As shown, mounting grooves 24 are formed around one end of the fixed mold 21 close to the movable mold 22 , and a buffer strip 60 is slidably mounted between the inner walls of the circumference of each mounting groove 24 .

[0034] like Figure 5As shown, mounting holes 25 are provided at both ends of the inner wall of the mounting groove 24 away from the buffer bar 60, and mounting rods 61 are fixedly connected at the end of the buffer bar 60 close to the mounting hole 25 and at the corresponding position of the mounting hole 25. The mounting rods 61 are slidably connected between the inner walls of the mounting hole 25 at one end away from the buffer bar 60, and a spring 2 62 is provided between the inner wall of the end of the mounting hole 25 away from the buffer bar 60 and the end of the mounting rod 61 away from the buffer bar 60.

[0035] Its function is that, through the structures such as the slide bar 13 and the buffer strip 60, when the hydraulic cylinder 10 pushes the movable mold 22 toward the fixed mold 21 through the push rod 11, the elastic expansion and contraction performance of the spring 14 and the spring 2 62 enables the fixed mold 21 to play a certain buffering and protective role after contacting the movable mold 22, thereby avoiding the rigid extrusion collision between the movable mold 22 and the fixed mold 21 or the push rod 11, which may cause damage to the mold, thereby improving the service life of the mold.

[0036] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A mold clamping assembly for an injection molding machine, comprising a hydraulic cylinder (10), characterized in that: A push rod (11) is slidably disposed at one end of the hydraulic cylinder (10); a guide rod (30) is fixedly connected at four corner positions of one end of the hydraulic cylinder (10) close to the push rod (11); and a mold mechanism for injection molding is disposed on the guide rod (30); The mold mechanism comprises a fixed mold (21) and a movable mold (22); four guide rods (30) are respectively fixedly connected at four corner positions of the fixed mold (21) and at one end close to the hydraulic cylinder (10) at one end away from the hydraulic cylinder (10); the movable mold (22) is arranged between the fixed mold (21) and the hydraulic cylinder (10); the guide rods (30) penetrate the four corner positions between the two ends of the movable mold (22) and are connected in a sliding fit; the fixed mold (21) and the movable mold (22) are snap-fitted together; and a buckle assembly for locking is also arranged between the fixed mold (21) and the movable mold (22).

2. The mold clamping assembly of the injection molding machine according to claim 1, characterized in that: The movable mold (22) is provided with mounting seats at the middle positions around the movable mold (22). The buckle assembly includes lock buckles (40). The lock buckles (40) are rotatably mounted on the mounting seats in a one-to-one correspondence. Torsion springs are installed between the lock buckles (40) and the mounting seats. The cross section of the lock buckles (40) is bent with both ends tilted outwards.

3. The mold clamping assembly of the injection molding machine according to claim 1, characterized in that: The buckle assembly further comprises a clamping groove (23), which is arranged one by one at the outer position around the end of the fixed mold (21) away from the movable mold (22), and the clamping groove (23) is buckled and matched with the end of the lock buckle (40) close to the fixed mold (21).

4. The mold clamping assembly of the injection molding machine according to claim 1, characterized in that: A fixing plate (50) is fixedly connected to one end of the push rod (11) near the movable mold (22) on the outer circumference of the push rod (11), and a pressing plate (51) is fixedly connected to the side walls of the fixing plate (50) in a one-to-one correspondence with the lock buckle (40), and an end of the pressing plate (51) away from the fixing plate (50) is in contact with the inner side of an end of the lock buckle (40) near the pressing plate (51).

5. The mold clamping assembly of the injection molding machine according to claim 1, characterized in that: A slide groove (12) is provided at one end of the push rod (11) close to the movable mold (22), a slide rod (13) is slidably installed between the inner walls of the slide groove (12), and one end of the slide rod (13) close to the movable mold (22) is fixedly connected to the center position of one end of the movable mold (22) close to the push rod (11), and a spring (14) is provided on the outer side of the circumference of the slide rod (13) between the movable mold (22) and the push rod (11).

6. The mold clamping assembly of the injection molding machine according to claim 1, characterized in that: The fixed mold (21) is provided with mounting grooves (24) around one end close to the movable mold (22), and a buffer strip (60) is slidably mounted between the inner walls of the circumference of each mounting groove (24).

7. The mold clamping assembly of the injection molding machine according to claim 6, characterized in that: The mounting groove (24) is provided with mounting holes (25) at both ends of the inner wall of one end away from the buffer strip (60); the end of the buffer strip (60) close to the mounting hole (25) and the corresponding position of the mounting hole (25) are fixedly connected with mounting rods (61); the end of the mounting rod (61) away from the buffer strip (60) is slidably connected between the inner walls of the mounting hole (25) in a one-to-one correspondence; and a second spring (62) is provided between the inner wall of the end of the mounting hole (25) away from the buffer strip (60) and the end of the mounting rod (61) away from the buffer strip (60).

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