Plastic part injection molding machine capable of rapidly replacing mold

Abstract

The utility model discloses a plastic part injection molding machine capable of quickly replacing a mold, which relates to the technical field of plastic part injection mold replacement and comprises a connecting piece, a fixed seat slidably clamped at the bottom of the connecting piece, a connecting groove arranged on the surface of the fixed seat, a positioning groove arranged at the bottom of the connecting groove and the bottom of the connecting piece, and a spring rod arranged on one side of the fixed seat close to the positioning groove. The surface of the fixing base is rotatably connected with a threaded rod through the inner side of the containing groove, the outer side of the threaded rod is in threaded connection with a movable block, the tail end of the threaded rod is provided with a gear assembly, the whole limiting pin is of a rectangular block structure, and the end, close to the positioning groove, of the limiting pin is provided with an inclined chamfer. Even if position errors exist between the connecting grooves in the surfaces of the clamping rails and the connecting grooves in the surfaces of the positioning grooves, the clamping rails can be pushed to be aligned with the connecting grooves of the positioning grooves through the inclined chamfers, and therefore the placing position of the connecting piece is calibrated.

Description

Technical Field

[0001] This utility model relates to the field of plastic injection mold replacement technology, and in particular to a plastic injection molding machine that allows for quick mold replacement. Background Technology

[0002] A plastic injection molding machine is a commonly used piece of equipment for producing one-piece plastic parts. It mainly works by heating plastic granules and injecting them into a mold to form the part.

[0003] When processing different batches or multiple types of plastic parts, operators will change the mold according to actual needs. Most existing mold installation methods are fixed installations. When changing, the original mold is completely removed, another mold is placed, and then fixed installation is completed again. During this process, operators need to repeatedly move the mold to ensure that the mold is placed in the correct position and repeatedly adjust its relative position with the injection molding equipment. However, most molds are made of metal and have a large self-weight and a certain volume. When adjusting the placement of the mold, the repeated movement of the mold by the operator is labor-intensive and poses a certain risk of damaging the mold. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to solve the problems existing in the prior art: most molds are made of metal and have a large self-weight and a certain volume. When operators adjust the placement of the mold, they have to move the mold repeatedly, which is labor-intensive and poses a certain risk of damaging the mold.

[0005] To solve the problems of the prior art, the technical solution of this utility model is as follows: it includes a connector with a rail at the bottom, a fixed seat slidably engaging at the bottom of the connector, a connecting groove adapted to the rail on the surface of the fixed seat, a positioning groove that is mutually adapted to the connecting groove and the rail at the bottom of the connector, a limiting tube is provided on the side of the fixed seat near the positioning groove, a spring rod is inserted inside the limiting tube, a limiting pin is provided at the end of the spring rod, a placement groove is provided on the surface of the fixed seat near the spring rod, a threaded rod is rotatably connected inside the placement groove, a movable block is threadedly connected to the outside of the threaded rod, and a gear assembly is provided at the end of the threaded rod that extends to the outside of the fixed seat and is located on the outside of the fixed seat.

[0006] Furthermore, the fixing base is generally U-shaped, with connecting grooves on both sides of the recess. The U-shaped fixing base, when used with the connector, can provide space for installing other structures and ensure effective support for the connector.

[0007] Furthermore, there are four positioning slots in total, and the four positioning slots are respectively set in pairs at both ends of the two connecting slots.

[0008] Furthermore, the spring rod consists of a round rod with a spherical end and a spring sleeved on the outside of the round rod. A baffle adapted to the limiting tube is provided on the side of the round rod near the limiting pin. The two ends of the spring are connected to the baffle and the limiting tube respectively, ensuring that the spring rod can move effectively in the horizontal direction inside the limiting tube.

[0009] Furthermore, the spring rod is always in a retracted state, so that the spring rod can always pull the limiting pin close to the movable block.

[0010] Furthermore, the limiting pin is in the form of a rectangular block structure, and the end of the limiting pin near the positioning groove is provided with an inclined chamfer to ensure that the limiting pin can be smoothly inserted into the card rail at the bottom of the connector through the connecting groove. Even if there is a positional error between the connecting groove on the surface of the card rail and the connecting groove on the surface of the positioning groove, the inclined chamfer can be used to push the connecting groove of the card rail and the positioning groove to align with each other, thereby calibrating the placement position of the connector.

[0011] Furthermore, the movable block is provided with inclined protrusions on both sides, and a platform is provided at the inclined end of the protrusion. The surface of the platform is provided with a groove that matches the spherical end of the spring rod. The spring rod can be moved by the inclined protrusions, and the position of the movable block can be limited after the end of the spring rod enters the groove to prevent the movable block from undergoing unnecessary displacement.

[0012] Furthermore, the gear assembly includes a driven gear disposed on the outside of the two threaded rods and a driving gear meshing with the driven gear. The surface of the driving gear is provided with a manual handle, which can be used to rotate the driving gear and drive the driven gear, thereby causing the threaded rod to rotate. The rotating threaded rod can cause the movable block to move.

[0013] Furthermore, the recessed portion of the fixed base is provided with stops on both sides of the maximum movement path of the movable block to limit the maximum movement distance of the movable block.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] 1. The gear assembly includes a driven gear disposed on the outside of two threaded rods and a driving gear meshing with the driven gear. The driving gear can be turned by manually rotating the driving gear, which in turn drives the driven gear, thereby causing the threaded rod to rotate. The rotating threaded rod can cause the movable block to move. The movable block moves by utilizing the mutual cooperation between the gears. Furthermore, the movable block can be moved by pushing the spring rod through the inclined protrusions on both sides. After the end of the spring rod enters the groove, it can limit the position of the movable block to prevent unnecessary displacement of the movable block.

[0016] 2. The limiting pin is in the shape of a rectangular block, and the end of the limiting pin near the positioning groove is provided with an inclined chamfer to ensure that the limiting pin can be smoothly inserted into the card rail at the bottom of the connector through the connecting groove. Even if there is a positional error between the connecting groove on the surface of the card rail and the connecting groove on the surface of the positioning groove, the inclined chamfer can be used to push the connecting groove of the card rail and the positioning groove to align with each other, thereby calibrating the placement position of the connector. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the connecting component structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the fixing base structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the connection state of the movable block of this utility model.

[0021] Reference numerals: 1. Connector; 2. Fixing seat; 3. Connecting groove; 4. Positioning groove; 5. Limiting tube; 6. Spring rod; 7. Limiting pin; 8. Placement groove; 9. Threaded rod; 10. Movable block; 11. Gear assembly. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] like Figure 1-4 As shown, a plastic injection molding machine for quick mold change includes a connector 1 with a rail at the bottom. A fixed seat 2 is slidably engaged at the bottom of the connector 1. The surface of the fixed seat 2 is provided with a connecting groove 3 that matches the rail. The fixed seat 2 is generally U-shaped, with connecting grooves 3 on both sides of the recess. The U-shaped fixed seat 2 and the connector 1 cooperate to provide space for installing other structures and ensure effective support for the connector 1. The connecting grooves 3 and the rail at the bottom of the connector 1 are provided with mutually compatible positioning grooves 4. There are four positioning grooves 4 in total, and the four positioning grooves 4 are set in pairs at both ends of the two connecting grooves 3.

[0024] A limiting tube 5 is provided on the side of the fixed base 2 near the positioning groove 4. A spring rod 6 is inserted inside the limiting tube 5. A limiting pin 7 is provided at the end of the spring rod 6. The spring rod 6 consists of a round rod with a spherical end and a spring sleeved on the outside of the round rod. A baffle adapted to the limiting tube 5 is provided on the side of the round rod near the limiting pin 7. The two ends of the spring are connected to the baffle and the limiting tube 5 respectively, ensuring that the spring rod 6 can move horizontally effectively inside the limiting tube 5. The limiting pin 7 is a rectangular block structure, and the end of the limiting pin 7 near the positioning groove 4 is provided with an inclined chamfer to ensure that the limiting pin 7 can be smoothly inserted into the rail at the bottom of the connector 1 through the connecting groove 3. Even if there is a positional error between the connecting groove 3 on the surface of the rail and the connecting groove 3 on the surface of the positioning groove 4, the inclined chamfer can push the rail and the connecting groove 3 of the positioning groove 4 to align with each other, thereby calibrating the placement position of the connector 1.

[0025] A placement groove 8 is provided on the surface of the fixed base 2 near the spring rod 6. A threaded rod 9 is rotatably connected to the inside of the placement groove 8, and a movable block 10 is threadedly connected to the outside of the threaded rod 9. The spring rod 6 is always in a retracted state, so that the spring rod 6 can always pull the limiting pin 7 close to the movable block 10. The movable block 10 has inclined protrusions on both sides, and the inclined ends of the protrusions are provided with platforms. The surface of the platform is provided with grooves that fit the spherical ends of the spring rod 6. The spring rod 6 can be moved by the inclined protrusions, and after the end of the spring rod 6 enters the groove, it can limit the position of the movable block 10 and prevent the movable block 10 from being displaced unnecessarily. The recessed portion of the fixed base 2 has stops on both sides of the maximum movement path of the movable block 10 to limit the maximum movement distance of the movable block 10. The end of the threaded rod 9 extends to the outside of the fixed base 2 and is provided with a gear assembly 11. The gear assembly 11 includes driven gears provided on the outside of the two threaded rods 9 and a driving gear meshing with the driven gears. The surface of the driving gear is provided with a manual handle. The driving gear can be rotated by manually rotating the driving gear, which in turn drives the driven gear, thereby causing the threaded rod 9 to rotate. The rotating threaded rod 9 can cause the movable block 10 to move.

[0026] Working principle description: First, when the operator needs to place the mold, the mold only needs to be pre-installed on the surface of the connector 1. Then, the connector 1 is aligned with the connecting groove 3 by the bottom rail and pushed in. Then, the operator rotates the gear assembly 11 to rotate the threaded rod 9. During the rotation of the threaded rod 9, the movable block 10 is displaced. During the movement of the movable block 10, the spring rod 6 is pushed out. The limiting pin 7 at the end of the extended spring rod 6 first passes through the positioning groove 4 on the surface of the connecting groove 3 and then enters the positioning groove 4 of the bottom rail of the connector 1. If there is an error in the position of the connector 1 and the fixed seat 2, the chamfered part of the limiting pin 7 will push the edge of the bottom positioning groove 4 of the connector 1. The connection causes the connector 1 to shift until the limiting pin 7 is fully inserted into the positioning groove 4 of the bottom rail of the connector 1. At this time, the limiting pin 7 simultaneously penetrates the positioning groove 4 in the bottom rail of the connector 1 and the positioning groove 4 in the connecting groove 3, thereby fixing the current position of the connector 1. The other end of the spring rod 6 of the limiting pin 7 is pushed into the groove at the end of the inclined part of the movable block 10 to ensure that the spring rod 6 and the movable block 10 will not shift in position. During the whole process, the operator only needs to place the connector 1 with the mold installed on the top of the fixed seat 2. While fixing the connector 1, the position of the connector 1 will be automatically corrected, so that the operator does not need to adjust it repeatedly.

[0027] When it is necessary to change the mold, rotate the gear assembly 11 in the opposite direction. At this time, the threaded rod 9 flips, thereby driving the inclined part of the movable block 10 away from the spring rod 6. The spring rod 6 gradually retracts under the action of the spring. During the retraction process, the limiting pin 7 at the end of the spring rod 6 leaves the positioning groove 4, thereby causing the connecting piece 1 to lose its fixation. Then, the connecting piece 1 is removed, and another connecting piece 1 with the required mold is placed. The above operation is repeated to fix the connecting piece 1 again to complete the operation. The whole process is simple and quick, without the need for manual repeated adjustment of the position, which greatly simplifies the mold change process.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid change mould plastic part injection molding machine comprising a connecting piece (1) provided with a clamping rail at the bottom, characterized in that: The connecting piece (1) is slidably clamped with a fixing seat (2), the surface of the fixing seat (2) is provided with a connecting groove (3) matched with the clamping rail, the connecting groove (3) is provided with a positioning groove (4) matched with each other on the side of the connecting piece (1) bottom clamping rail, the side of the fixing seat (2) close to the positioning groove (4) is provided with a limiting pipe (5), the spring rod (6) is inserted into the limiting pipe (5), the spring rod (6) is provided with a limiting pin (7) at the end, the surface of the fixing seat (2) close to the spring rod (6) is provided with a placing groove (8), the screw rod (9) is rotatably connected to the inner side of the placing groove (8), the screw rod (9) is screw connected with a movable block (10), the screw rod (9) extends to the outside of the fixing seat (2) and is provided with a gear assembly (11) at one end outside the fixing seat (2).

2. The plastic part injection molding machine with quick mold change of claim 1, wherein: The shape of the fixing seat (2) is concave as a whole, and the connecting grooves (3) are arranged on both sides of the recess.

3. A rapid mold change plastic part injection molding machine as described in claim 2, wherein: The positioning groove (4) has four, and the four positioning grooves (4) are respectively arranged at two ends of the two connecting grooves (3).

4. The plastic part injection molding machine with quick mold change of claim 1, wherein: The spring rod (6) is composed of a round rod with a spherical end and a spring sleeved outside the round rod, wherein the side of the round rod close to the limiting pin (7) is provided with a baffle matched with the limiting pipe (5), and the both ends of the spring are connected with the baffle and the limiting pipe (5) respectively.

5. The plastic part injection molding machine with quick mold change of claim 4, wherein: The spring rod (6) is always in a contracted state.

6. The rapid mold change plastic part injection molding machine of claim 1, wherein: The limiting pin (7) is a rectangular block structure as a whole, and the end of the limiting pin (7) close to the positioning groove (4) is provided with an inclined chamfer.

7. The plastic part injection molding machine with quick mold change of claim 4, wherein: The movable block (10) is provided with an inclined protrusion on both sides, and the inclined end of the protrusion is provided with a platform, and the surface of the platform is provided with a groove matched with the spherical end of the spring rod (6).

8. The rapid mold change plastic part injection molding machine of claim 1, wherein: The gear assembly (11) comprises a driven gear arranged outside the two screw rods (9) and a driving gear engaged with the driven gear, wherein the surface of the driving gear is provided with a manual handle.

9. The rapid mold change plastic part injection molding machine of claim 2, wherein: The recess part of the fixing seat (2) is provided with a stop block on both sides close to the maximum movement path of the movable block (10).

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