CN204725803U - A kind of pickup structure with moving core injection mould - Google Patents

Abstract

The utility model discloses a pick-up structure for an injection mold with a movable core, which comprises an upper mold assembly and a lower mold assembly. The upper mold assembly includes a fixed plate and an upper mold arranged on the fixed plate. There is at least one oblique pin; the lower mold assembly includes a bottom plate, a lower mold arranged on the bottom plate, an injection cavity is formed after the upper mold and the lower mold are closed, and at least one slide block pushed by the oblique pin is arranged on the lower mold, A side core pulling is arranged on the slider; a movable core is arranged in the lower mold. At least one limit block is also arranged on the lower die, and one end of the limit block cooperates with the movable core to be stuck, and a first push rod for pushing the limit block to move horizontally and a first push rod for pushing the movable core to move vertically are also provided. Two putters. The utility model separates the movable core from the parts and takes them out one by one through the improvement of the mold structure, which greatly reduces the labor intensity and improves the production efficiency, and can be widely used in the field of injection molds with movable cores.

Description

A Pick-up Structure of Injection Mold with Movable Core

technical field

The utility model relates to the field of injection molds, in particular to a pick-up structure for an injection mold with a movable core.

Background technique

In the processing of injection molded parts, in order to meet the needs of product process strength or use, it is sometimes necessary to install metal inserts in injection molded parts, such as metal inserts that increase the local strength of the part, and conductive metal sheets injected into the part and other structures. In order to meet the requirements of the injection molding process, a movable core structure is usually used. When processing the part, the movable core is taken out first, the metal insert is installed, and then the whole is put into the mold for injection molding. However, in the existing mold design, the movable core is usually taken out of the mold together with the workpiece, and then the movable core is separated from the workpiece by manual operation, because the package between the workpiece and the movable core after injection molding The tightening force is large, and the labor intensity is high by manual picking, especially for the structure in which some metal inserts are inserted into the movable core, the pulling force is even greater. And in the process of taking parts by some simple tools, it is easy to cause damage to the parts, resulting in the scrapping of the parts.

Utility model content

The purpose of the utility model is to provide a pick-up structure for an injection mold with a movable core, which solves the problem of high intensity, time-consuming and labor-intensive separation of the existing injection molded part and the movable core.

The technical scheme adopted by the utility model to solve the technical problem is: a pick-up structure for an injection mold with a movable core, including an upper mold assembly and a lower mold assembly, and the upper mold assembly includes a fixed plate and is arranged on a The upper mold on the fixed plate is also provided with at least one oblique pin; the lower mold assembly includes a bottom plate, a lower mold arranged on the bottom plate, an injection cavity is formed after the upper mold and the lower mold are closed, and the lower mold is at least provided with A slider pushed by an oblique pin, on which a side core puller is arranged; a movable core is arranged in the lower mold. At least one limit block is also arranged on the lower die, and one end of the limit block cooperates with the movable core to be stuck, and a first push rod for pushing the limit block to move horizontally and a first push rod for pushing the movable core to move vertically are also provided. Two putters.

Further, a limiting groove is provided on the side of the movable core, the limiting block is an L-shaped structure, and the diameter of the first push rod is larger than the depth of the limiting block extending into the limiting groove.

Further, a supporting block is also provided between the bottom plate and the lower mold, and a bottom needle plate and a face needle plate are also arranged on the bottom plate, and the first push rod and the second push rod are fixedly arranged on the bottom needle plate and the face needle plate. between the plates; the bottom needle plate cooperates with the ejector pin on the injection molding machine.

In order to ensure that the bottom needle plate and the face needle plate can be reset quickly after the removal of the parts is completed, a set of return springs is also arranged between the face needle plate and the lower die.

The beneficial effects of the utility model: by setting the limit block and the first push rod on the lower die, in the process of parting the mold, the movable core is first fixed by the limit block, and the workpiece and the movable type are firstly fixed by the push rod. The core is separated, and then the limit block is separated from the movable core through the first push rod, and finally the movable core is withdrawn by the second push rod, so as to complete the pick-up and separation of the workpiece and the movable core. The workpiece is separated from the movable core, which reduces the labor intensity, and the removal of the parts is more reliable and less likely to be damaged. The utility model has good structural synchronism, reliable performance, small required power and low energy consumption. At the same time, the metal insert can be installed on the movable core outside the mold, and then put into the lower mold together for injection molding, which can improve the processing efficiency. The return spring can make the bottom needle plate and the face needle plate drive the first push rod and the second push rod back to the initial position after the movable core is taken out, so as to carry out the next injection molding.

The utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a cross-sectional view of the mold of the present invention in a closed state.

Fig. 2 is a partially enlarged view of A-A in Fig. 1 .

Fig. 3 is a cross-sectional view of the mold of the utility model under the mold opening state.

Fig. 4 is a three-dimensional structural schematic diagram of the movable core and the limit block of the utility model.

Detailed ways

Embodiments, as shown in Figures 1 to 4, a pick-up structure for an injection mold with a movable core includes an upper mold assembly and a lower mold assembly, and the upper mold assembly includes a fixed plate 1 and is arranged on the fixed plate. The upper mold 2 on the 1 is also provided with an injection gate on the upper mold assembly. Also be provided with oblique pin 3, described oblique pin 3 can be provided with one or can be provided with two oblique pins 3 symmetrically. The oblique pin 3 is arranged at an acute angle with the centerline of the mold, and preferably, the included angle between the oblique pin 3 and the centerline of the mold is 30-45°. Cooperating with the oblique pin 3, a slide block 6 is arranged on the lower die 5 of the lower die assembly, and the slide block 6 is provided with an oblique hole matched with the oblique pin 3, and the oblique pin 3 is inserted into the oblique hole. When the upper mold assembly moves up and down, under the action of the oblique pin 3, the slider 6 slides horizontally on the lower mold 5. In order to ensure that the position of the slider 6 does not shift, a slide rail 16 arranged along the moving direction of the slider is also provided on the lower mold 5, and a slide groove is correspondingly arranged on the slider 6, and the slider 6 rides on it. on rail 16. It should be noted that the technical solution protected by the utility model is not limited to this type of slide rail structure, and can also be other structures such as dovetail grooves, as long as the slide rail structure that can ensure that the slider moves in a fixed horizontal direction is uniform. Within the protection scope of the present utility model. The slider 6 is also provided with a side core 8 formed by a part. When the mold is closed, the side core 8 is located in the injection cavity. When the mold is separated, the oblique pin 3 drives the slider 6 to move to both sides. Thereby the side core pulling 8 is separated from the workpiece, so that the workpiece can be taken out from the lower mold.

The upper mold 2 and the lower mold 5 are closed to form an injection cavity. Specifically, the upper mold 2 is provided with an upper mold insert 21, the lower mold 5 is provided with a lower mold insert 51, and the upper mold insert 21 and the lower mold insert The injection molding cavity 17 is formed between the mold inserts 51 . A movable core 7 is also arranged in the lower mold 5 . The lower mold 5 is also provided with a limit block 9 for fixing the movable core 7, and the limit block 9 may be provided with one, or two, preferably two, so that the force of the mold is more uniform. One end of the limiting block 9 is locked in cooperation with the movable core 7, and a first push rod 10 for pushing the limiting block 9 to move horizontally and a second push rod 11 for pushing the movable core 7 to move vertically are also provided. The number of the first push rod 10 is consistent with that of the limit block 9 . The side of the movable core 7 is provided with a limit groove 71, the limit block 7 is an L-shaped structure, and the diameter of the first push rod 10 is greater than the depth that the limit block 9 extends into the limit groove 71 . The limiting block 9 is pushed out from the limiting groove 71 of the movable core 7 through the first push rod 10 , and then the movable core 7 is pushed out through the second push rod 11 .

The lower mold assembly also includes a bottom plate 4, a support block 12 arranged between the bottom plate 4 and the lower mold 5, a bottom needle plate 13 and a face needle plate 14 are also arranged on the bottom plate 4, and the first push rod 10 and The second push rod 11 is fixedly arranged between the bottom needle plate 13 and the face needle plate 14 . Also be provided with the 3rd push rod (not marked among the figure) that pushes workpiece to eject on bottom needle plate 13. The bottom needle plate 13 cooperates with the ejector pin on the injection molding machine. Also be provided with one group of back-moving spring 15 between face needle plate 14 and lower mold 5, make bottom needle plate and face needle plate can return quickly after finishing taking parts, just carry out next injection molding.

In designing the utility model, special attention should be paid to the distance that the slider moves from the closed to the opened state of the mold, which is required to be greater than the diameter of the first push rod, so that there is enough space between the movable core and the slider for the limit The block is withdrawn from the active core. An inclined-plane structure is arranged on the end of the limiting block that cooperates with the first push rod, and the inclined-plane structure is also arranged on the first pushing rod, so that the first pushing rod can smoothly enter and exit between the movable core and the limiting block, and the limiting Bit block extruded movable core. The idle stroke of the second push rod is required to be greater than that of the first push rod, so that the first push rod has pushed the limit block out of the movable core, and then the second push rod pushes the movable core to eject the lower mold.

The mold opening stroke of the utility model is as follows: when opening the mold, the oblique pin first drives the slider to slide to both sides, and when the oblique pin is separated from the slider, the side core on the slider is separated from the workpiece. Then the ejector rod of the injection molding machine pushes the bottom needle plate to move upward, and the third push rod first pushes out the workpiece. At this time, because the movable core is stuck by the limit block and cannot move upward, the workpiece and the movable For the separation of the core, the workpiece is taken out first. The ejector rod drives the bottom needle plate to continue to move upwards, and the first push rod contacts with the limit block earlier, and the limit block is extruded from the movable core, so that the movable core is separated from the restraint of the limit block. The ejector rod continues to move upwards until the second push rod is pushed against the bottom of the movable core, and the movable core is pushed out from the lower mold, and then the movable core is taken out, the ejector rod is reset, and the bottom needle plate and face needle plate are fixed on it. The upper components return to their initial positions under the elastic force of the return spring. At this point, you can put in the next active core with the metal insert installed, close the mold, and carry out the injection molding of the next part. The utility model automatically separates the workpiece from the movable core through the improvement of the structure of the mold itself. Compared with the traditional manual separation of the workpiece and the movable core, the utility model greatly reduces the labor intensity and improves the production efficiency. And it can effectively prevent the damage of the workpiece caused when the workpiece is separated from the movable core.

Claims (6)

1. the pickup structure with moving core injection mould, comprise mould assembly and lower mould assembly, it is characterized in that: described upper mould assembly comprises fixed head (1) and is arranged on the patrix (2) on fixed head (1), is also provided with at least one taper pin (3); Described lower mould assembly comprises base plate (4), be arranged on the counterdie (5) on base plate (4), patrix (2) and counterdie (5) closed rear formation injection molding cavity, counterdie (5) is at least provided with a slide block (6) promoted by taper pin (3), slide block (6) is provided with a side core-pulling (8); A moving core (7) is provided with in described counterdie (5);

Counterdie (5) is also at least provided with a limited block (9), described limited block (9) one end coordinates stuck with moving core (7), is also provided with and promotes the first push rod (10) that limited block (9) moves horizontally and the second push rod (11) promoting moving core (7) vertical motion.

2. the pickup structure of band moving core injection mould as claimed in claim 1, it is characterized in that: the side of described moving core (7) is provided with a stopper slot (71), described limited block (7) is a L-type structure, and the diameter of described first push rod (10) is greater than the degree of depth that limited block (9) stretches into stopper slot (71).

3. the pickup structure of band moving core injection mould as claimed in claim 1, it is characterized in that: between described base plate (4) and counterdie (5), be also provided with back-up block (12), base plate (4) is also provided with end needle plate (13) and face needle plate (14), and described first push rod (10) and the second push rod (11) are fixedly installed between end needle plate (13) and face needle plate (14); Needle plate of the described end (13), coordinates with the push rod on injection machine.

4. the pickup structure of band moving core injection mould as claimed in claim 3, is characterized in that: be also provided with one group of back-moving spring (15) between described needle plate (14) and counterdie (5).

5. the pickup structure of band moving core injection mould as claimed in claim 1, is characterized in that: described counterdie (5) is provided with slide rail (16), and described slide block (6) is in the upper horizontal slip of slide rail (16).

6. the pickup structure of band moving core injection mould as claimed in claim 1, it is characterized in that: described taper pin (3) is symmetrically set with two, slide block (6) corresponding with it is also provided with two, described limited block (9) is respectively provided with 1 in the left and right of moving core (7), and corresponding the first push rod (10) is also provided with two.