CN205380843U - Be suitable for complicacy to mould injection mold of piece - Google Patents

Abstract

The utility model discloses a be suitable for complicacy to mould injection mold of piece, comprises an upper die and a lower die, the lower mould include die cavity template, its characterized in that the die cavity template on be equipped with back slider, side slide, loose core and kicking block to one side, furthermore, the upper surface of oblique kicking block correspond with a bottom surface of moulding, to one side the kicking block the side and the relative arrangement of loosing core to one side, still be equipped with the projection in the oblique side of kicking block, loose core to one side, to one side kicking block and each slider be by corresponding oil cylinder drive. The utility model discloses a being applicable to the injection mold that the complicacy was moulded, being equipped with back slider, slider in the die cavity of lower mould, loosing core and movable part such as kicking block to one side, these movable parts can do backward under respective oil cylinder drive, to under both sides, the slant or oblique rebound. Set up these movable parts on the position of the unable direct drawing of patterns, after the die sinking, break away from the movable part from mould the piece earlier, and then carry out the drawing of patterns.

Description

An injection mold suitable for complex plastic parts

technical field

The utility model relates to the field of injection molds, in particular to an injection mold suitable for complex plastic parts and a demoulding method thereof.

Background technique

Existing injection molds include an upper mold (also called a male mold) and a lower mold (also called a female mold). The lower mold has a core corresponding to the shape of the inner surface of the plastic part, and the lower mold has a core corresponding to the shape of the outer surface of the plastic part. cavity. After the upper and lower molds are closed, the core and the cavity are matched, and the injection fluid is poured into the space between the two. After the injection fluid cools, the upper mold is opened, and the plastic part is taken out after demoulding. For plastic parts with relatively complex structures, sliders are usually set on the upper mold. After the injection molding is completed and cooled, slide the sliders first, and then demould. However, for plastic parts with more complex structures, such as plastic parts with a large depth dimension and local holes and grooves, the mold with the existing structure cannot realize the one-time injection molding process.

As shown in Fig. 1 and Fig. 2, the plastic part is a chair body, including a seat 10, an armrest 11, an armrest support 16 and a chair back 12. Described armrest 11, armrest support 16 and chair back 12 are curved surface shape, and the both sides of seat 10 are trumpet-shaped, and the four jiaos of seat 10 are also provided with a pair of rear foot connection columns 17 and a pair of rear foot connecting posts 17 and a pair of fixed rear chair pin usefulness. For the front foot connecting column 13 used for fixing the front foot, the rear foot connecting column 17 is connected with the armrest support 16 . Each connecting column 13 and 17 is provided with a socket 14 , and a pair of screw fixing holes 15 are also provided inside the socket 14 . The chair pin is inserted in the socket 14, and the screw can be screwed into the screw fixing hole 15 to fix the chair pin and the chair body. Due to the depth of the chair body, there are many curved surface structures on the upper part, the seat 10 on both sides is inclined, the connecting columns 13 and 17 are inclined outward, and the connecting columns 13 and 17 have circular sockets 10 and screw fixing holes 15 , For plastic parts with such a complex structure, conventional molds cannot complete demoulding.

Contents of the invention

The utility model aims to solve the above-mentioned problems in the prior art, and aims to provide an injection mold suitable for complex plastic parts.

In order to solve the above problems, the utility model adopts the following technical solutions: an injection mold suitable for complex plastic parts, including an upper mold and a lower mold, and the lower mold includes a cavity template, which is characterized in that the cavity template There are rear sliders, side sliders, inclined core-pulling blocks and inclined top blocks; and the upper surface of the inclined top block corresponds to the bottom surface of the plastic part, and the side of the inclined top block is opposite to the inclined core-pulling block. Configuration, there is also a convex column on the side of the inclined top block; the inclined core pulling, inclined top block and each slider are all driven by corresponding oil cylinders.

The utility model relates to an injection mold suitable for complex plastic parts. In the cavity of the lower mold, there are movable parts such as rear slider, slider, inclined core pulling and inclined top block. These movable parts are driven by their respective oil cylinders. It can be moved backwards, to the sides, diagonally downward or diagonally upward. These movable parts are arranged on the parts that cannot be directly demoulded. After the mold is opened, the movable parts are separated from the plastic part first, and then the demoulding is carried out. Wherein, the inclined core-pulling corresponds to the oblique slot on the plastic part, and the protruding post on the inclined top block corresponds to the transverse slot on the plastic part. According to the complexity of the structure of the processed plastic part, one, two or more side sliders can be used. It is also possible to use one pair, two pairs or more pairs of side sliders according to the symmetry of the processed plastic parts.

Using the injection mold plus type plastic part of the utility model, the demoulding operation is carried out according to the following steps after the injection molding is completed:

1), mold opening;

2) The rear slider slides backward under the drive of the oil cylinder, and the side slider slides outward under the drive of the oil cylinder;

3) The oblique core-pulling moves obliquely downward under the drive of the oil cylinder;

4) The slanted top block moves upwards under the drive of the oil cylinder, the top of the slanted top block moves closer to the center, the convex post on the slanted top block is separated from the plastic part, and the top of the slanted top block pushes the plastic part out of the lower mold Cavity;

5) Demoulding, take out the plastic parts.

The utility model can be integrally injection-molded for complex shapes, especially plastic parts with local hole structures, which can improve production efficiency, reduce technological processes, reduce production costs, and is beneficial to the improvement of product appearance and structure.

As an improvement of the utility model, the side sliders include a pair of first side sliders and a pair of second side sliders. This structure is especially suitable for plastic parts with symmetrical shapes.

As a further improvement of the present utility model, there are four oblique core-pulling blocks and four oblique top blocks respectively, and they correspond to each other. This structure makes the utility model particularly suitable for the injection molding process of the chair body with the connecting socket of the chair leg and the fixing hole of the chair leg screw.

As a further improvement of the utility model, the pouring port is arranged at the bottom of the lower mold, so that the pouring port of the product is on the bottom surface without being exposed, so the product has a high aesthetic appearance.

As a further improvement of the utility model, a cooling water pipeline is also provided in the upper mold and/or the lower mold. During the pouring process, water cooling is used to accelerate the cooling of the injection molding liquid, which can further increase production efficiency and ensure that the mold is not damaged by high temperature.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Fig. 1 is a structural schematic diagram of a plastic chair body.

Fig. 2 is a schematic structural view of the bottom of a plastic chair body.

Fig. 3 is a schematic structural view of the injection mold of the present invention.

Fig. 4 is a schematic structural view of the upper mold of the injection mold of the present invention.

Fig. 5 is a structural schematic diagram of the lower mold of the injection mold of the present invention, and what is shown in the figure is the initial state after the mold is opened.

Fig. 6 is a state diagram of the lower mold of the present invention after the slider slides out.

Fig. 7 is a state diagram of the lower die of the present invention after the oblique core pulling moves obliquely downward.

Fig. 8 is a state diagram of the lower mold of the present invention after the inclined ejector is ejected.

detailed description

Referring to Fig. 1 and Fig. 2, the processed product is the plastic chair body of a chair in the utility model embodiment. The plastic part is an integral structure, including a seat 10 , an armrest 11 , an armrest support 16 and a chair back 12 . Described armrest 11, armrest support 16 and chair back 12 are in the shape of a curved surface, and the both sides of seat 10 are trumpet-shaped, and the four corners of seat 10 are also provided with a pair of cylindrical rear foot connecting posts 17 for fixing the rear chair feet. With a pair of cylindrical front foot connecting columns 13 for fixing the front feet, the rear foot connecting columns 17 are connected with the armrest support 16. Each connecting column 13 and 17 is provided with a circular socket 14 , and a pair of circular screw fixing holes 15 are also provided inside the socket 14 .

Referring to FIG. 3 , an injection mold suitable for complex plastic parts of the present invention includes an upper mold 17 and a lower mold 18 .

Referring to FIG. 4 , the upper mold 17 has a core 26 corresponding to the inner surface of the plastic part, the upper mold 17 is provided with a cooling water pipeline, and the front wall is provided with a water inlet and outlet 19 .

Referring to FIG. 5 , the lower mold includes a base plate 23 , a base 22 and a cavity template 9 . The cavity template 9 is provided with a rear slider 1, a pair of first side sliders 3 corresponding to the outer surface of the rear foot connecting column 17, and a pair of second side sliders corresponding to the outer surface of the front foot connecting column 17. Slide block 6, four oblique core pullers 8 and four oblique top blocks 7 corresponding to the sockets 14 of the front and rear foot connecting columns 13, 17; and, the upper surface of each oblique top block corresponds to the bottom surface of the seat 10, each The side surface of a slanting top block corresponds to the outer surfaces of the front and rear foot connecting columns 13, 17, and a pair of bosses 25 corresponding to the screw fixing holes 15 in the socket 14 are also provided on the side of the slanting top block; The oblique core pulling 8, the oblique top block 7 and each slide block are all driven by corresponding oil cylinders.

The pouring port 21 is provided at the bottom of the lower mold 18 . In this way, the pouring port of the product is on the bottom surface without being exposed, so the product has a high aesthetic appearance.

The lower mold 18 is also provided with a cooling water pipeline, and the front wall of the lower mold 18 is provided with an inlet and outlet 24 of the cooling water pipeline.

The utility model is an injection mold suitable for complex plastic parts. After the injection molding is completed, it is operated in the following order:

1), mold opening.

2) The oil cylinder 1 drives the rear slider 2 to slide backward, the two oil cylinders 4 respectively drive the two first side sliders 3 to slide to both sides, and the two oil cylinders 5 drive the two second side sliders 6 to slide to both sides ,As shown in Figure 6.

3), 4 oil cylinders (below the oblique core-pulling 8, not shown in the figure) respectively drive the 4 oblique core-pulling 8 to move obliquely downward, as shown in FIG. 7 .

4), 4 oil cylinders (below the inclined top block, not shown in the figure) drive the four inclined top blocks 7 to move obliquely upward. During the movement, the top of the slanting top block 7 moves closer to the center, and the protruding post 25 on the slanting top block 4 breaks away from the plastic part, and pushes the product out of the cavity 20 of the lower mold, as shown in FIG. 8 .

5) Demoulding, take out the plastic parts.

It should be understood that: the above-mentioned embodiment is only an illustration of the utility model, rather than a limitation of the utility model, and any utility model creation within the scope of the essential spirit of the utility model all falls within the protection scope of the utility model .

Claims (5)

1. A kind of injection mold that is applicable to complex plastic parts, comprises patrix (17) and counterdie (18), and described counterdie comprises cavity formwork (9), is characterized in that described cavity formwork (9) ) is provided with a rear slider (1), a side slider, an inclined core pulling (8) and an inclined top block (7); and, the upper surface of the inclined top block (7) corresponds to the bottom surface of the plastic part, The side of the inclined top block (7) is arranged opposite to the inclined core pulling (8), and a convex column (25) is also arranged on the side of the inclined top block (7); the inclined core pulling (8), the inclined core pulling Jack block (7) and each slide block are all driven by corresponding oil cylinder. 2. An injection mold suitable for complex plastic parts according to claim 1, characterized in that said side sliders include a pair of first side sliders (3) and a pair of second side sliders (6 ). 3. An injection mold suitable for complex plastic parts according to claim 1, characterized in that there are 4 inclined core pullers (8) and inclined top blocks (7) respectively, and they correspond to each other. 4. An injection mold suitable for complex plastic parts according to claim 1, characterized in that the sprue (21) is arranged at the bottom of the lower mold (18). 5. An injection mold suitable for complex plastic parts according to any one of claims 1-4, characterized in that the upper mold (17) and/or the lower mold (18) are also provided with cooling water pipes road.