CN114750367B - A three-plate non-coplanar stacked mold structure - Google Patents

Abstract

The present invention discloses a three-plate non-co-opening stack mold structure, comprising a front mold, a rear mold and a stripper plate, wherein the rear mold, the front mold and the stripper plate are stacked, the rear mold is arranged at the bottom, the front mold is arranged between the rear mold and the stripper plate, a first mold cavity for molding a product is arranged between the front mold and the rear mold, a second mold cavity for molding another product is arranged between the front mold and the stripper plate, and during the process of driving the rear mold in a direction away from the front mold, the second mold cavity and the first mold cavity are sequentially separated, and the injection flow channel of the first mold cavity is connected to the injection flow channel of the second mold cavity. The present invention provides a three-plate non-co-opening stack mold structure with a stacking design, and the stacking structure is used to produce different products respectively to ensure the matching synchronization of the overall product.

Description

A three-plate non-coaxial stacked mold structure

Technical Field

The invention relates to the field of moulds, in particular to a three-plate non-coaxial stacked mould structure.

Background technique

In the conventional injection molding production process, a set of molds is usually used to form one product, which results in a wide variety of molds, large space occupation and high cost.

In order to save mold space and improve production efficiency, some molds adopt stacking design, but these stacking designs are designed for the same product in batches with the same stacking structure and uniform and stable force transmission under the stacking state, thus achieving the purpose of improving production efficiency. However, this design is highly independent, and other supporting structures cannot be produced synchronously, that is, during the production process, the output of this product may be greater than the output of supporting products, resulting in poor product synchronization and delayed assembly process, thus affecting the overall product production efficiency.

Summary of the invention

The technical problem to be solved by the present invention is to provide a three-plate non-coaxial stacked mold structure with a stacked design, wherein the stacked structure is used to produce different products respectively to ensure the matching synchronization of the overall product.

The technical solution adopted by the present invention to solve the above-mentioned problem is: a three-plate non-opening stack mold structure, including a front mold, a rear mold and a stripper plate, the rear mold, the front mold and the stripper plate are stacked, the rear mold is arranged at the bottom, the front mold is arranged between the rear mold and the stripper plate, a first mold cavity for molding a product is provided between the front mold and the rear mold, and a second mold cavity for molding another product is provided between the front mold and the stripper plate. When the rear mold is driven in a direction away from the front mold, the second mold cavity and the first mold cavity are sequentially separated, and the injection channel of the first mold cavity is connected with the injection channel of the second mold cavity.

Compared with the prior art, the advantages of the present invention are: the first mold cavity is used to produce one product, and the second mold cavity produces another product. During the injection molding process, because the injection molding runner of the first mold cavity is connected to the injection molding runner of the second mold cavity, the synchronization of pouring can be guaranteed. If pouring fails, the pouring quality of the two products will be affected and they cannot be assembled together. The situation where one product is in excess and the other is insufficient can be avoided. At the same time, during the molding process of the two mold cavities, due to the stacked design, a single driving source can be used to ensure the consistency of the force of the two mold cavities and ensure the injection molding quality of the two mold cavities.

As an improvement of the present invention, the three-plate non-opening stack mold structure also includes a fixed top mold base, and the stripper plate is limitedly connected to the top mold base. When the rear mold moves in the direction away from the front mold, the second mold cavity is separated. Through the improvement, when the rear mold moves in the direction away from the front mold, if the stripper plate is not limited, the stripper plate will move with the front mold and the rear mold, thereby causing the stripper plate to be unable to be separated from the front mold, which is not conducive to demolding the product in the second mold cavity.

As an improvement of the present invention, a first limiting groove is provided on the top mold base, a first limiting bolt is inserted in the first limiting groove, the head of the first limiting bolt is connected in the first limiting groove for limiting movement, the insertion end of the first limiting bolt passes through the top mold base and the stripping plate and the first limiting bolt is fixedly connected to the stripping plate, and the stripping plate is limited by the improvement.

As an improvement of the present invention, an ejector assembly for ejecting the product in the second mold cavity is provided above the second mold cavity. Through the improvement and the design of the ejector assembly, it is convenient to demold the product in the second mold cavity.

As an improvement of the present invention, the ejector assembly includes an ejector plate and an ejector, the ejector is fixedly connected to the ejector plate, and the upper end of the ejector plate is provided with a driving rod for driving the ejector plate to move and eject. Through the improvement, because the ejector assembly is used to eject the product in the second mold cavity, it itself is not directly connected to the driving source. Therefore, the ejection mode of the ejector assembly of the traditional design is not suitable for use in the present design. Only by designing the driving rod can the ejection function of the ejector assembly be realized, which is convenient for demolding.

As an improvement of the present invention, in the mold closing state, a gap is provided between the bottom of the first limit groove and the head of the first limit bolt, the middle section of the driving rod is hinged on the stripping plate, one end of the driving rod is hinged to the ejector plate, and the other end of the driving rod is limitedly connected to the top mold base through a limit block. When the gap is reduced and the stripping plate is separated from the top mold base, the driving rod rotates to eject the ejector plate. Through the improvement, the stripping plate and the top mold base are separated. During the downward movement of the stripping plate, the other end of the driving rod is limitedly connected to the top mold base to ensure that the height remains unchanged, and one end of the driving rod will eject the ejector due to the hinge, thereby realizing the demolding of the product in the second mold cavity.

As another improvement of the present invention, a reset spring is provided between the ejector plate and the stripper plate. Through the improvement, the ejector assembly is reset when the mold is closed to ensure the quality of the next injection molding and facilitate the next demolding of the second mold cavity product.

As another improvement of the present invention, a connecting sleeve is provided between the head of the first limiting bolt and the first limiting groove. Through the improvement, when the stripping plate is separated from the top die seat, if there is no design of the connecting sleeve, the first limiting bolt will rub against the top die seat, which is not conducive to the long-term use of the top die seat and the first limiting bolt, and at the same time will affect the coaxiality of the first limiting bolt, resulting in a positional offset between the top die seat and the stripping plate.

As another improvement of the present invention, the front mold limit is connected to the top mold base, and when the rear mold moves in the direction away from the front mold, the first mold cavity is separated. Through the improvement, when the rear mold moves in the direction away from the front mold, if the front mold is not limited, the front mold will move with the rear mold, which will make it impossible to separate the front mold from the rear mold, which is not conducive to demolding the product in the first mold cavity.

As another improvement of the present invention, the top mold base is also connected to a second limiting bolt, and the front mold is provided with a second limiting groove that cooperates with the second limiting bolt to limit the position. Through the improvement, the front mold is limited, thereby achieving separation of the front mold and the rear mold during the downward movement of the rear mold, thereby achieving the demolding of the first mold cavity.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view of the first mold cavity and the second mold cavity of the present invention.

FIG. 2 is a schematic diagram of the injection molding flow channel structure of the present invention.

FIG. 3 is a schematic diagram of the connection structure of the first limiting bolt and the second limiting bolt of the present invention.

FIG. 4 is a schematic diagram of the cross-sectional structure of the guide column of the present invention.

FIG. 5 is a schematic diagram of the connection structure of the driving rod and the limiting block according to another embodiment of the present invention.

FIG. 6 is a schematic diagram of the connection structure between the limit block and the top mold base in another embodiment of the present invention.

As shown in the figure: 1. front mold, 1.1. second limit groove, 2. rear mold, 3. stripper plate, 4. first mold cavity, 5. second mold cavity, 6. injection runner, 7. ejector seat, 7.1. first limit groove, 7.2. gap, 7.3. connecting sleeve, 7.4. limit block moving groove, 8. first limit bolt, 9. ejector pin assembly, 9.1. ejector pin plate, 9.2. ejector pin, 9.3. driving rod, 9.4. reset spring, 9.5. limit block, 10. second limit bolt, 11. guide column.

Detailed ways

The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

As shown in Fig. 1-2, a three-plate non-coaxial stack mold structure comprises a front mold 1, a rear mold 2 and a stripper plate 3, wherein the rear mold 2, the front mold 1 and the stripper plate 3 are stacked, the rear mold 2 is arranged at the bottom, the front mold 1 is arranged between the rear mold 2 and the stripper plate 3, a first mold cavity 4 for molding a product is provided between the front mold 1 and the rear mold 2, and a second mold cavity 5 for molding another product is provided between the front mold 1 and the stripper plate 3, when the rear mold 2 is driven in a direction away from the front mold 1, the second mold cavity 5 is sequentially separated from the first mold cavity 4, the injection channel 6 of the first mold cavity 4 is connected with the injection channel 6 of the second mold cavity 5, and injection molding is performed through an injection port, and the injection material is diverted and flows to the two first mold cavities 4 and the two second mold cavities 5 respectively for molding two different products.

During the injection molding process, in order to ensure the smooth flow of the injection molding material in the injection molding runner 6 and to facilitate the cleaning of the injection molding material after the injection molding is completed, the connection between the injection molding runner 6 of the first mold cavity 4 and the injection molding runner 6 of the second mold cavity 5 is arranged between the stripping plate 3 and the front mold 1. Because the connection will be provided with multiple corners, the injection molding material is easy to accumulate at these connections. When the stripping plate 3 and the front mold 1 are separated and demolded, the injection molding material will cool and solidify. When the next injection molding is performed, the injection molding material in the injection molding runner 6 needs to be heated and liquefied or cleaned. If only heating and liquefaction are used, the injection molding cycle will be prolonged, and the distribution range and The number of distributions will be greatly increased, resulting in a substantial increase in the cost of the injection mold. If only the cleaning method is used, the layout of the injection runner 6 is very limited, and there will be a heating process around the two mold cavities. The utilization rate of the heating parts around the two mold cavities will also be reduced. Therefore, a method combining heating, liquefaction and cleaning of the injection runner 6 will be adopted for design. The position close to the mold cavity adopts the heating and liquefaction design, and the area far from the mold cavity adopts the cleaning design. In the present invention, the cleaning design is adopted at the connection between the injection runner 6 of the first mold cavity 4 and the injection runner 6 of the second mold cavity 5, which is a more reasonable solution. At the same time, the injection molding runner 6 of the second mold cavity 5 is also arranged between the stripping plate 3 and the front mold 1, which simplifies the structural design of the overall injection molding runner 6 and makes it easier to process the injection molding runner 6 on the mold. The injection molding runner 6 of the first mold cavity 4 has a runner that is vertically designed in the front mold 1. This runner is not easy to clean and is arranged around the first mold cavity 4. The heating elements around the first mold cavity 4 are reasonably utilized, and the injection molding material is processed by a heating and liquefaction method to ensure the smoothness of the injection molding runner 6.

As shown in FIG. 3 , the three-plate non-coaxial stack mold structure also includes a fixed top mold base 7 , and the stripper plate 3 is limitedly connected to the top mold base 7 . When the rear mold 2 moves away from the front mold 1 , the second mold cavity 5 is separated. The top die seat 7 is provided with a first limiting groove 7.1, and a first limiting bolt 8 is inserted in the first limiting groove 7.1. The head of the first limiting bolt 8 is connected to the first limiting groove 7.1 for limiting movement. The insertion end of the first limiting bolt 8 passes through the top die seat 7 and the stripping plate 3, and the first limiting bolt 8 is fixedly connected to the stripping plate 3. The front die 1 is limitedly connected to the top die seat 7. When the rear die 2 moves away from the front die 1, the first die cavity 4 is separated. The top die seat 7 is also connected to the second limiting bolt 10. The front die 1 is provided with a second limiting groove 1.1 that cooperates with the second limiting bolt 10 for limiting position. The insertion end of the second limiting bolt 10 is provided with a threaded hole that cooperates with the insertion end of the first limiting bolt 8. After the first limiting bolt 8 and the second limiting bolt 10 are threadedly connected and fixed, the stripping plate 3 and the end of the second limiting bolt 10 are abutted against each other, so that the stripping plate 3 and the first limiting bolt 8 are fixed.

As shown in Figures 1 and 2, an ejector assembly 9 for ejecting the product in the second mold cavity 5 is provided above the second mold cavity 5, and the ejector assembly 9 includes an ejector plate 9.1 and an ejector 9.2. The ejector 9.2 is fixedly connected to the ejector plate 9.1, and a driving rod 9.3 for driving the ejector plate 9.1 to move and eject is provided at the upper end of the ejector plate 9.1. In the mold closing state, a gap 7.2 is provided between the bottom of the first limiting groove 7.1 and the head of the first limiting bolt 8, and the driving rod 9.3 is provided at the upper end of the ejector plate 9.1. The middle section of the rod 9.3 is hinged on the stripping plate 3, one end of the driving rod 9.3 is hinged to the ejector plate 9.1, and the other end of the driving rod 9.3 is limitedly connected to the top die seat 7 through a limit block 9.5. When the gap 7.2 is reduced and the stripping plate 3 is separated from the top die seat 7, the driving rod 9.3 rotates to eject the ejector plate 9.1. A reset spring 9.4 is provided between the ejector plate 9.1 and the stripping plate 3, and a connecting sleeve 7.3 is provided between the head of the first limit bolt 8 and the first limit groove 7.1. When demolding is performed in the second mold cavity 5, the rear mold 2 is driven downward to move so that the front mold 1, the stripping plate 3 and the ejector assembly 9 move downward by their own gravity for separation and demolding, wherein the front mold 1 and the stripping plate 3 are separated by a conventional downward movement method, and the ejector assembly 9 uses the lever structure of the driving rod 9.3 to make the downward movement distance of the ejector plate 9.1 greater than the downward movement distance of the stripping plate 3, thereby achieving the purpose of ejecting the product in the second mold cavity 5 by the ejector 9.2.

The first mold cavity 4 is also provided with an ejection assembly for ejecting the product in the first mold cavity 4 and a lateral module for molding the product in the first mold cavity 4. Both the ejection assembly and the lateral module are conventional structures in the mold and are not shown in the schematic diagram.

As shown in Figure 4, in order to ensure the stability of movement between the top mold base 7, the stripper plate 3, the front mold 1, and the rear mold 2 during mold separation, a guide column 11 penetrating the top mold base 7, the stripper plate 3, the front mold 1, and the rear mold 2 is respectively provided along the four corners of the three-plate non-opening stack mold structure.

When splitting the mold, the operation is as follows:

S1: The rear mold 2 moves downward, and the front mold 1 and the stripper plate 3 move downward synchronously with the rear mold 2;

S2: the gap 7.2 is eliminated, the stripper plate 3 is limited, the stripper plate 3 is separated from the front mold 1, and the ejector assembly 9 ejects the product in the second mold cavity 5;

S3: The rear mold 2 continues to move downward, the front mold 1 is limited, the rear mold 2 is separated from the front mold 1, the lateral module withdraws laterally, and the ejection assembly ejects the product in the first mold cavity 4;

S4: Take out two products, a total of four;

S5: driving the rear mold 2 to move upwards to close the mold;

S6: The lateral module and the ejector assembly are reset;

S7: the front mold 1 and the rear mold 2 are against each other, and the rear mold 2 drives the front mold 1 to move upward;

S8: The front mold 1 abuts against the stripper plate 3, driving the stripper plate 3 to move upward;

S9: Under the action of the return spring 9.4, the ejector assembly 9 is reset, and the ejector 9.2 withdraws from the second mold cavity 5;

S10: The stripper plate 3 abuts against the top mold base 7, preparing for the next injection molding.

Another embodiment of the connection between the driving rod 9.3 and the limit block 9.5:

As shown in Figures 5 and 6, in order to ensure the stability of the connection between the driving rod 9.3 and the limit block 9.5, the limit block 9.5 is a cylinder fixedly connected to the other end of the driving rod 9.3, and both ends of the limit block 9.5 protrude from the driving rod 9.3. A limit block moving groove 7.4 connected to the protruding part of the limit block 9.5 is provided on the top mold base 7, and the two ends of the limit block are movably connected in the limit block moving groove 7.4. Through the design of the limit block moving groove 7.4, the ejection distance of the ejector plate 9.1 can be limited.

In the original embodiment, the gap 7.2 between the bottom of the first limiting groove 7.1 and the head of the first limiting bolt 8 is used to limit the rotation angle of the driving rod 9.3, and the other end of the driving rod 9.3 is only limited on the top mold base 7 by the limiting block 9.5, which does not have a stable connection effect and control effect, and it is easy to cause unstable friction between the other end of the driving rod 9.3 and the limiting block 9.5, and between the other end of the driving rod 9.3 and the lower surface of the top mold base 7 during each demolding, which is not conducive to the stable use of the driving rod 9.3 and it is not easy to control the service life of the driving rod 9.3 and the limiting block 9.5.

Through the design of another embodiment, the connection stability between the driving rod 9.3 and the limit block 9.5 can be stabilized, and unstable friction can be avoided. At the same time, only the other end of the driving rod 9.3 needs to be designed into a semicircle, and the center of the limit block 9.5 is designed to be coaxial with the other end of the driving rod 9.3, which can ensure that the driving rod 9.3 will not rub against the lower surface of the top mold base 7 when rotating, thereby ensuring the service life of the driving rod 9.3 and the limit block 9.5.

The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims (5)

1. The utility model provides a three board are with open mould structure that folds which characterized in that: including front mould (1), rear mould (2) and take off flitch (3), rear mould (2), front mould (1) are the range upon range of setting with take off flitch (3), the bottom is located to rear mould (2), between rear mould (2) and take off flitch (3) are located to front mould (1), be equipped with first die cavity (4) that are used for shaping a product between front mould (1) and rear mould (2), be equipped with second die cavity (5) that are used for shaping another product between front mould (1) and take off flitch (3), drive the in-process according to the direction of keeping away from front mould (1) through rear mould (2), realize the split mould of second die cavity (5) and first die cavity (4) in proper order, injection moulding runner (6) of first die cavity (4) are connected with injection moulding runner (6) of second die cavity (5), three board are different with open die stack mould structures still including being fixed die holder (7) that set up, take off flitch (3) spacing connection is on die holder (7), when first die (7) are kept away from in the direction of keeping away from front mould (1), first die cavity (7) is realized to one side of die holder (7), the head of the first limit bolt (8) is movably connected in the first limit groove (7.1) in a limit way, the insertion end of the first limit bolt (8) passes through the ejector die holder (7) and the stripper plate (3) and the first limit bolt (8) is fixedly connected with the stripper plate (3), an ejector pin assembly (9) for ejecting a product in the second die cavity (5) is arranged above the second die cavity (5), the ejector pin assembly (9) comprises an ejector plate (9.1) and an ejector pin (9.2), the ejector pin (9.2) is fixedly connected to the ejector plate (9.1), the upper end of the ejector plate (9.1) is provided with a driving rod (9.3) for driving the ejector plate (9.1) to move and eject, in a die closing state, a gap (7.2) is arranged between the bottom of the first limit groove (7.1) and the head of the first limit bolt (8), the driving rod (9.3) is hinged on the stripper plate (3), the ejector pin assembly (9.2) is connected with the ejector plate (9.1) in a hinge joint manner, and when the ejector pin (9.3) is separated from the ejector plate (9.1) by the ejector plate (9.1) in a die closing state, and the ejector pin is separated from the ejector plate (9.3) by the ejector pin seat (9.1),

S1: the rear mould (2) moves downwards, and the front mould (1) and the stripper plate (3) and the rear mould (2) synchronously move downwards;

S2: the gap (7.2) is eliminated, the stripper plate (3) is limited, the stripper plate (3) is separated from the front die (1), and meanwhile, the ejector pin assembly (9) ejects out the product in the second die cavity (5);

S3: the rear die (2) continues to move downwards, the front die (1) is limited, the rear die (2) is separated from the front die (1), the lateral die block transversely withdraws, and the ejection assembly ejects the product in the first die cavity (4);

s4: taking out the two products, and taking out the four products.

2. The three-plate non-simultaneous open stack mold structure according to claim 1, wherein: a reset spring (9.4) is arranged between the thimble plate (9.1) and the stripper plate (3).

3. The three-plate non-simultaneous open stack mold structure according to claim 1, wherein: a connecting sleeve (7.3) is arranged between the head of the first limit bolt (8) and the first limit groove (7.1).

4. The three-plate non-simultaneous open stack mold structure according to claim 1, wherein: the front die (1) is in limit connection with the top die seat (7), and when the rear die (2) moves in a direction away from the front die (1), the die separation of the first die cavity (4) is realized.

5. The three-plate non-simultaneous open stack mold structure according to claim 4, wherein: the top die seat (7) is further connected with a second limit bolt (10), and the front die (1) is provided with a second limit groove (1.1) which is matched with the second limit bolt (10) for limiting.