CN105172045B - Mould structure - Google Patents

Abstract

The invention relates to a mould structure, comprising a mould frame, wherein a cavity is arranged in the mould frame, an opening communicated with the cavity is arranged on the mould frame, a first ejector plate and a second ejector plate which can move are arranged in the cavity, a central core is arranged on the second ejector plate, the central core passes through the first ejector plate and the opening and extends to the upper surface of the mould frame, an ejector pin for ejecting a mould pressing product at the top end of the central core is arranged on the first ejector plate, a limit screw for adjusting the positions of the first ejector plate and the second ejector plate is arranged between the first ejector plate and the second ejector plate, a lower mould core is arranged on the outer side of the upper end of the central core, and an upper mould core is arranged above the lower mould core, the invention can directly clean and wipe the mould core part on an injection molding machine through the improvement of the mould structure, guarantee to exhaust unblocked, reduce the clean maintenance number of times of lower mould, improve production efficiency, reduce cost promotes injection moulding product quality by a wide margin.

Description

a mold structure

【Technical field】

The invention relates to a mold structure.

【Background technique】

Mold, various molds and tools used in industrial production for injection molding, blow molding, extrusion, die-casting or forging forming, smelting, stamping and other methods to obtain the required products. In short, molds are tools used to shape objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object through the change of the physical state of the formed material.

For precision products, in order to ensure the stability of the product size, the exhaust of the mold must be considered on the mold. The solution to the poor exhaust is to make inserts. The traditional inserts are fixed. This method only It can correspond to small batch production. If mass production is required, gas gas will be generated during the plastic injection molding process. This gas will block the exhaust gap between the inserts and cause defective products, because the core inserts are fixed. , It is impossible to clean it directly on the injection molding machine. At this time, the mold can only be lowered and completely disassembled for cleaning and maintenance. After the mold is installed, the machine will be restarted for production. Repeated operations will greatly reduce production efficiency.

As shown in Figure 5, the mold structure of the non-movable mold core, after the mold is opened, the product A is ejected from the lower mold core 5 under the action of the thimble 21. This structure produces hundreds of thousands of molds. The gas generated during the injection molding process Will block the exhaust gap between the center core 31 and the lower mold kernel 5, causing the product to be trapped and bad.

Due to the above-mentioned problems, it is necessary to propose a solution, and the present invention is made under such a background.

【Content of invention】

The technical problem to be solved by the present invention is to provide a mold structure for the deficiencies in the above-mentioned prior art. Through the improvement of the mold structure, the mold core part can be cleaned and wiped directly on the injection molding machine, so as to ensure smooth exhaust and reduce the number of mold cores. The frequency of cleaning and maintenance improves production efficiency, reduces costs, and greatly improves the quality of injection molding products.

To achieve the above object, the present invention adopts the following technical solutions:

A mold structure, comprising a mold base, a cavity is provided in the mold base, an opening communicating with the cavity is provided on the mold base, and a movable first The ejector plate and the second ejector plate are provided with a central core on the second ejector plate, and the central core passes through the first ejector plate and the opening and extends to the upper surface of the formwork, where the The first ejector plate is provided with an ejector pin for ejecting the molded product at the top of the center core, and an ejector pin for adjusting the first ejector plate and the second ejector plate is provided between the first ejector plate and the second ejector plate. The limit screw at the position of the plate is provided with a lower mold core outside the upper end of the center core, and an upper mold core is arranged above the lower mold core.

A spring is arranged between the inner wall of the above-mentioned mold base and the second ejector plate.

Positioning pins are arranged in the mold frame as described above, and the positioning pins pass through the first ejector plate and the second ejector plate.

As mentioned above, the first ejector plate and the second ejector plate are stacked, and the first ejector plate is arranged above the second ejector plate.

As mentioned above, the first thimble plate is formed by fastening two stacked plates through the first fastening screw, the thimble is fixed on the lower plate, and the second thimble plate is formed by two stacked plates through the second fastening screw. It is formed by fastening screws, and the central core is fixed on the lower plate.

The beneficial effects of the present invention are:

1. Through the improvement of the mold structure, the invention can directly clean and wipe the mold core part on the injection molding machine to ensure smooth exhaust, reduce the number of cleaning and maintenance of the lower mold, improve production efficiency, reduce costs, and greatly improve the quality of injection molding products.

2. The present invention provides a mold structure. The mold structure realizes the movement of the center core through different stroke settings. After the center core is cleaned and maintained, the ejection stroke of the injection molding machine is reset to restore it. Production status, so that the second batch of production can be carried out again, and such repeated operations can greatly increase the output of the product.

3. In the present invention, a spring is provided between the inner wall of the mold base and the second ejector plate. During production, after the mold is opened, the ejector rod of the injection molding machine is pushed against the first ejector plate, so that the first ejector pin The plate moves forward, the second thimble plate is kept stationary under the action of the spring, and the thimble moves forward with the first thimble plate, thereby ejecting the product A molded on the center core. At this time, the injection mold must be set The ejection distance of the machine is L, and the size of L can be set according to the actual situation, preferably 5mm, with ingenious design and precise molding.

4. In the present invention, the first ejector plate and the second ejector plate are stacked, the first ejector plate is arranged above the second ejector plate, and the first ejector plate consists of two stacked plates passing through the second ejector plate. A fastening screw is fastened, the thimble is fixed on the lower plate, the second thimble plate is formed by fastening two stacked plates through the second fastening screw, and the central core is fixed on the On the lower plate, this setting is convenient for adjusting and positioning the mold, which is convenient for operation.

【Description of drawings】

Fig. 1 is a schematic cross-sectional view of the clamping mold of the present invention.

Fig. 2 is a schematic cross-sectional view of the state of mold opening and product ejection according to the present invention.

Fig. 3 is a schematic cross-sectional view of the present invention, the state of ejecting the product and the central core.

FIG. 4 is an exploded schematic diagram of FIG. 3 .

Fig. 5 is a schematic cross-sectional view of a mold structure in the prior art.

【detailed description】

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, a mold structure includes a mold frame 1, a cavity 10 is provided in the mold frame 1, and an opening communicating with the cavity 10 is provided on the mold frame 1 11. A first ejector plate 2 and a second ejector plate 3 which can be moved or moved are arranged in the cavity 10, and a central core 31 is arranged on the second ejector plate 3, and the central core 31 passes through The first ejector plate 2 and the opening 11 extend to the upper surface of the mold frame 1, and the first ejector plate 2 is provided with an ejector pin 21 for ejecting the molded product at the top of the central core 31. A stop screw 4 for adjusting the position of the first ejector plate 2 and the second ejector plate 3 is provided between the first ejector plate 2 and the second ejector plate 3, and a stop screw 4 is provided outside the upper end of the center core 31. The lower mold core 5 is provided with an upper mold core 6 above the lower mold core 5. Through the improvement of the mold structure, the present invention can directly clean and wipe the mold core part on the injection molding machine to ensure smooth exhaust and reduce the cleaning of the lower mold. Maintenance times, improve production efficiency, reduce costs, and greatly improve the quality of injection molding products. The mold structure realizes the movement of the center core through different stroke settings. After the center core is cleaned and maintained, reset the top of the injection molding machine. Make it out of the trip to restore the production status, so that the second batch of production can be carried out, and such repeated operations can greatly increase the output of the product.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, in this embodiment, a spring 7 is arranged between the inner wall of the mold base 1 and the second ejector plate 3. During production, when the mold is opened Finally, the ejector stick of the injection molding machine is pushed against the first ejector plate 2, so that the first ejector plate 2 moves forward, and the second ejector plate 3 is kept still under the action of the spring 7, and the ejector pin 21 follows the direction of the first ejector plate 2. front movement, thereby ejecting the molded product A on the center core 31. At this time, the injection molding machine must be set to only eject the distance L. The size of L can be set according to the actual situation. It is preferably 5 mm. The design is clever and the molding accurate.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, in this embodiment, a positioning pin 8 is arranged inside the mold frame 1, and the positioning pin 8 passes through the first ejector plate 2 and the second ejector plate. Two ejector plates 3, the positioning pins 8 make the first ejector plate 2 and the second ejector plate 3 move along the positioning pins 8, which is convenient for controlling the stroke and controlling the precision of the mould.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, in this embodiment, the first ejector plate 2 and the second ejector plate 3 are stacked, and the first ejector plate 2 is arranged on the second ejector plate. Above the thimble plate 3, this setting is convenient for adjusting and positioning the mould, and is convenient for operation.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, in this embodiment, the first thimble plate 2 is formed by fastening two stacked plates through first fastening screws 91, and the thimble 21 Fixed on the lower plate, the second thimble plate 3 is formed by fastening two stacked plates through the second fastening screw 92, and the central core 31 is fixed on the lower plate. The present invention adopts the mold structure The improvement makes it possible to clean and wipe the mold core directly on the injection molding machine to ensure smooth exhaust, reduce the number of cleaning and maintenance of the lower mold, improve production efficiency, reduce costs, and greatly improve the quality of injection molding products.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, in this embodiment, when the mold produces hundreds of thousands of molds, the gas gas generated during the injection molding process will block the central core 31 and the lower mold core. 5 The exhaust gap in the middle causes the product to be trapped. At this time, it is only necessary to set the ejection stroke of the injection molding machine to H, and the second ejector plate 3 is driven forward by a distance S under the action of the limit screw 4. , so that the center core 31 is ejected beyond the upper surface of the lower mold core 5, and the center core 31 is cleaned and maintained. After cleaning, the ejection stroke of the injection molding machine is set to L again, so that the second Batch production, such repeated operations can greatly improve the output of products, L is preferably 5mm, S is preferably 6mm, and the length of H is equal to the sum of the lengths of L and S, preferably 11mm. The invention provides a mold structure, the mold structure realizes the movement of the center core through different stroke settings. After the center core is cleaned and maintained, the ejection stroke of the injection molding machine is reset to restore the production state, so that it can be carried out again. For the second batch of production, such repeated operations can greatly increase the output of the product.

Claims (3)

1. A kind of 1. mould structure, it is characterised in that：Including mould bases (1), cavity (10) is provided with the mould bases (1), described Mould bases (1) is provided with the opening (11) communicated with the cavity (10), and the first top of energy activity is provided with the cavity (10) Needle plate (2) and the second ejector retainner plate (3), central core (31), the central core (31) are provided with second ejector retainner plate (3) The mould bases (1) upper surface is extended to through first ejector retainner plate (2) and the opening (11), in first ejector retainner plate (2) be provided with and be used to eject the thimble (21) of the central core (31) top molded product, in first ejector retainner plate (2) and The stop screw for being used for adjusting first ejector retainner plate (2) and the second ejector retainner plate (3) position is provided between second ejector retainner plate (3) (4) lower die (5), is provided with the outside of the central core (31) upper end, upper cores (6) are provided with above the lower die (5), Spring (7), first ejector retainner plate (2) and the second top are provided between the mould bases (1) inwall and second ejector retainner plate (3) Needle plate (3) is stacked, and first ejector retainner plate (2) is located above second ejector retainner plate (3).
2. 2. mould structure according to claim 1, it is characterised in that：Alignment pin (8), institute are provided with the mould bases (1) State alignment pin (8) and pass through first ejector retainner plate (2) and the second ejector retainner plate (3).
3. 3. mould structure according to claim 1, it is characterised in that：First ejector retainner plate (2) is by 2 pieces of plates being laminated Formed by the first trip bolt (91) fastening, thimble (21) fixation is located on lower floor's plate, second ejector retainner plate (3) Formed by the plate of 2 pieces of stackings by the second trip bolt (92) fastening, central core (31) fixation is located at lower floor's plate On.