A multi-station mold

Abstract

The utility model provides a kind of multi-station mould, belong to mould technical field.It has solved the problem of lower forming efficiency of existing multi-station mould.The multi-station mould, including fixed mould, movable mould and main shaft, fixed mould and movable mould moulding form multiple forming cavities, main shaft passes through movable mould horizontally and can be axially slid and circumferentially rotate relative to movable mould, one end of main shaft towards fixed mould is fixed with turntable, multiple rotating plates that are evenly distributed along circumference and are in strip plate shape are connected on turntable, the end portion on one end of rotating plate is all fixed with the rotating core that is in columnar and is set along the radial direction of main shaft, fixed mould and movable mould are all set up and let the mouth of rotating plate to place the gap, the mouth wall of gap is close to the outside wall of rotating plate, movable mould is fixedly connected with reset guide pin, which is set along the axial direction of rotating plate and is set along the axial direction of main shaft, reset guide pin is set close to forming cavity.The multi-station mould can improve the forming efficiency of mould.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a multi-station mold. Background Technology

[0002] When producing thick-walled products, if a single injection molding process is used, the issue of shrinkage during cooling after injection molding needs to be considered. Therefore, multi-station injection molding is usually used in production, which involves multiple injection molding processes to achieve gradual injection and reduce shrinkage.

[0003] Existing multi-station molds, such as the multi-color multi-station mold disclosed in Chinese patent application [Authorization Announcement No.: CN116238100A], include a fixed mold, a moving mold, and a main shaft. The main shaft passes horizontally through the moving mold and can slide axially and rotate circumferentially relative to the moving mold. A mounting base is fixed to the end of the main shaft facing the fixed mold. Several rotating cores, evenly distributed circumferentially, are fixed on the mounting base. These rotating cores are all columnar and arranged radially along the main shaft. When the moving mold and the fixed mold are in the closed state, the rotating cores are respectively inserted into several injection cavities. Each rotating core is slidably connected to a top plate along its circumference. Each top plate is fitted onto the rotating core and is perpendicular to it. The mounting base is also equipped with a return spring that can press the top plate against the side of the mounting base. The moving mold is equipped with a drive structure that can lift the horizontally facing top plate upward when the moving mold and the fixed mold are in the mold opening state. The mounting base has an equilateral triangle cross section along the radial direction of the main shaft, and each mounting base has three circumferentially distributed mounting surfaces. The three mounting surfaces are parallel to the center line of the main shaft, and a top plate is slidably connected to each mounting surface along the axial direction of the rotating core.

[0004] The above structure consists of a mounting base fixed on the main shaft, and multiple rotating cores fixed on the mounting base. The mounting base has an equilateral triangular cross-section along the radial direction of the main shaft and is an integral block structure. Therefore, the mounting base is relatively large. Since this case is for injection molding of thick-walled products, the main shaft needs to move the mounting base repeatedly during the molding process, which requires a large driving force and affects the molding efficiency. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a multi-station mold. The technical problem to be solved by this utility model is: how to solve the problem of low molding efficiency in existing multi-station molds.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A multi-station mold includes a fixed mold, a moving mold, and a main shaft. The fixed mold and the moving mold are closed to form multiple forming cavities. The main shaft passes horizontally through the moving mold and can slide axially and rotate circumferentially relative to the moving mold. A turntable is fixed to one end of the main shaft facing the fixed mold. The turntable is characterized by having multiple rotating plates that are evenly distributed circumferentially and are in the shape of long strips. Each rotating plate has a columnar rotating core fixed to one end and arranged radially along the main shaft. Both the fixed mold and the moving mold have clearance openings for the rotating plates to be placed. The opening wall of the clearance opening is close to the outer wall of the rotating plate. The moving mold is fixed with return guide pins that correspond one-to-one with the rotating plates and are arranged axially along the main shaft. The return guide pins are located close to the forming cavities. When the moving mold and the fixed mold are in the closed state, several rotating cores are respectively inserted into several forming cavities, and the rotating plates are located in the corresponding clearance openings and sleeved on the return guide pins.

[0008] When the moving mold and the fixed mold are closed, the spindle moves until the rotating core of the rotating plate is placed in the corresponding molding cavity. At the same time, the rotating plate moves along the spindle axis until it is sleeved on the return guide pin, thus achieving the positioning of the rotating plate and the fixed mold. In order to achieve lightweight design, this application uses a small-area turntable fixed to the spindle, and then connects multiple rotating plates evenly distributed circumferentially to the turntable. The rotating plates are long strips. Because of their long length and the fact that the rotating core is connected to the end of the turntable, the rotating plates are prone to positional deviation during mold closing. In order to improve the positioning stability of the rotating plates, clearance holes are opened on both the fixed mold and the moving mold. During mold closing, the rotating plates are pre-positioned through the clearance holes, and then the circumferential limit of the rotating plates is achieved through the return guide pin, which improves the positioning stability of the rotating plates after mold closing. Thus, while meeting the lightweight design of the mold, the stability of the rotating plates is improved by setting the clearance holes and the return guide pin, thereby improving the molding efficiency of the mold.

[0009] In the aforementioned multi-station mold, the rotating plate has a positioning hole along the main shaft axis, and the positioning hole has a flared guide surface at the opening facing the moving mold. The outer wall of the end of the return guide pin contracts radially inward.

[0010] By cooperating with the guide surface on the positioning hole and the outer wall of the return guide pin, the rotating plate can be quickly fitted onto the return guide pin during positioning, thus playing a guiding role and making the guiding and positioning of the rotating plate faster, thereby improving the forming efficiency of the mold.

[0011] In the multi-station mold described above, each rotating plate has two rotating cores connected to its end, and the return guide pin is located near one end of the rotating core.

[0012] Due to the design of the rotating plate, its strength is limited when the main shaft moves axially. Therefore, in order to ensure that the semi-finished product and the rotating core are ejected synchronously in the molding cavity, two rotating cores are set up. This allows the rotating plate to stably eject the two rotating cores along with the semi-finished product, improving the stability of the mold. In order to ensure that the rotating core can be stably set in the molding cavity, the return positioning pin is set close to one end of the rotating core. This allows the installation of the rotating core to be carried out without affecting the installation of the rotating core, and one end of the rotating plate can be quickly positioned.

[0013] In the multi-station mold described above, the other end of the rotating plate is placed on the end face of the turntable facing the fixed mold, and the turntable and the rotating plate are fixedly connected by fasteners.

[0014] By placing the rotating plate directly on the end face of the turntable, the spindle needs to move along its own axis toward the fixed mold direction when the mold is opened, and the semi-finished product is lifted by the turntable together with the rotating plate. At this time, the structure of the turntable and the rotating plate remains intact, and there are no holes or other openings in them. Therefore, the strength of the turntable and the rotating plate at this point is guaranteed, and the stability of the mold is improved.

[0015] In the multi-station mold described above, one end of the rotating plate is connected to a rotating core fixing block. The rotating core fixing block has a positioning countersunk hole at one end facing the rotating plate. The rotating core is rod-shaped and has a large-diameter end and a small-diameter end. The diameter of the large-diameter end is larger than the diameter of the small-diameter end. The large-diameter end is located between the rotating plate and the rotating core fixing block and abuts against the positioning countersunk hole radially along the main axis and is pressed onto the rotating plate by the rotating core fixing block. The small-diameter end passes through the rotating plate.

[0016] The rotating core has a large-diameter end and a small-diameter end. The small-diameter end is inserted through the rotating plate, while the large-diameter end is pressed onto the rotating plate by the rotating core fixing plate, which facilitates the installation and positioning of the rotating core.

[0017] In the multi-station mold described above, the rotating core fixing plate is connected with bolts arranged radially along the main shaft. The bolts press the other end of the rotating core fixing plate against the rotating plate, and the bolts are arranged between the two rotating cores.

[0018] The bolt is pressed onto the rotating plate at the other end of the rotating core fixing plate. The direction of the bolt force is opposite to the direction of the large diameter end of the rotating core and the rotating core fixing plate, so that the bolt can stably press the rotating core fixing plate onto the rotating plate, achieving stable positioning of the rotating core. The setting of the bolt position makes the positioning of the two rotating cores more stable.

[0019] In the multi-station mold described above, one end of the rotating plate is set on the turntable, and the end of the plate is set close to the center of the turntable. The rotating plate is fixed to the turntable by fasteners at both the center and the outer edge of the turntable.

[0020] By fixing the rotating plate to the center and the outer edge of the turntable, the number of connection points between the rotating plate and the turntable is increased, thus improving the stability of the connection. Furthermore, by fixing the rotating plate to the center and the edge of the turntable, which is equivalent to fixing it to the inner and outer ends of the turntable, the stability of the rotating plate connection is also improved.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] 1. In order to achieve a lightweight design, this application uses a small-area turntable fixed to the main shaft, and then connects multiple rotating plates evenly distributed along the circumference to the turntable. The rotating plates are long strips. Because of their long length and the fact that the rotating core is connected to the end of the turntable, by providing clearance holes on both the fixed mold and the moving mold, the rotating plates are pre-positioned through the clearance holes during mold closing, and then the circumferential limit of the rotating plates is achieved through the return guide pin, thereby improving the stability of the positioning of the rotating plates after mold closing.

[0023] 2. By setting two rotating cores, the rotating plate can stably eject the two rotating cores together with the semi-finished product, thereby improving the stability of the mold. In order to ensure that the rotating cores can be stably set in the molding cavity, the return positioning pin is set close to one end of the rotating core. This way, the installation of the rotating cores can be carried out without affecting the installation of the rotating cores, and one end of the rotating plate can be quickly positioned. Attached Figure Description

[0024] Figure 1 This is a side view of the present invention.

[0025] Figure 2 yes Figure 1 Sectional view of AA.

[0026] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0027] Figure 4 This is a front view of the present invention.

[0028] Figure 5 yes Figure 4 A cross-sectional view of BB.

[0029] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle.

[0030] Figure 7 This is a partial structural schematic diagram of the present invention.

[0031] In the diagram, 1. Fixed mold; 2. Moving mold; 21. Return guide pin; 3. Main shaft; 4. Molding cavity; 5. Turntable; 51. Rotating plate; 51a. Positioning hole; 51b. Guide surface; 52. Rotating core; 52a. Large diameter end; 52b. Small diameter end; 53. Rotating core fixing block; 53a. Positioning countersunk hole; 6. Relief opening; 7. Fastener; 8. Bolt. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] like Figure 1 and Figure 2 As shown, this multi-station mold includes a fixed mold 1, a moving mold 2 and a main shaft 3. The fixed mold 1 and the moving mold 2 are closed to form multiple molding cavities 4. The main shaft 3 passes horizontally through the moving mold 2 and can slide axially and rotate circumferentially relative to the moving mold 2. A turntable 5 is fixed at one end of the main shaft 3 facing the fixed mold 1.

[0034] Specifically, such as Figure 2 and Figure 3 As shown, a number of rotating plates 51, which are evenly distributed circumferentially and are in the shape of long strips, are connected to the turntable 5. A rotating core 52, which is columnar and arranged radially along the main shaft 3, is fixed to one end of each rotating plate 51. Both the fixed mold 1 and the moving mold 2 are provided with relief openings 6 for the rotating plates 51 to be placed. The opening wall of the relief opening 6 is close to the outer wall of the rotating plate 51. The moving mold 2 is fixed with a return guide pin 21 that is arranged one-to-one with the rotating plate 51 and is arranged axially along the main shaft 3. The return guide pin 21 is located close to the molding cavity 4. When the moving mold 2 and the fixed mold 1 are in the mold-closed state, several rotating cores 52 are respectively inserted into several molding cavities 4, the rotating plate 51 is located in the corresponding relief opening 6 and the rotating plate 51 is sleeved on the return guide pin 21.

[0035] When the moving mold 2 and the fixed mold 1 are closed, the main shaft 3 moves to rotate the turntable 5 so that the rotating core 52 of the rotating plate 51 is placed in the corresponding molding cavity 4. At the same time, the rotating plate 51 moves axially along the main shaft 3 until it is sleeved on the return guide pin 21, thus achieving the positioning of the rotating plate 51 and the fixed mold 1. In order to achieve a lightweight design, this application uses a small-area turntable 5 fixed to the main shaft 3, and then connects multiple rotating plates 51 evenly distributed circumferentially to the turntable 5. The rotating plate 51 is long and narrow, and because of its long length and the fact that the rotating core 52 is connected to the rotating plate 5... At the end, the rotating plate 51 is prone to positional deviation during mold closing. To improve the positioning stability of the rotating plate 51, a clearance hole 6 is provided on both the fixed mold 1 and the moving mold 2. During mold closing, the rotating plate 51 is pre-positioned through the clearance hole, and then the circumferential limit of the rotating plate 51 is achieved through the return guide pin 21, which improves the positioning stability of the rotating plate 51 after mold closing. Thus, while meeting the requirements of lightweight mold design, the stability of the rotating plate 51 is improved by setting the clearance hole 6 and the return guide pin 21, thereby improving the molding efficiency of the mold.

[0036] like Figure 3 As shown, the rotating plate 51 has a positioning hole 51a along the main shaft 3. The positioning hole 51a has a flared guide surface 51b at the opening of the moving mold 2. The outer wall of the end of the return guide pin 21 shrinks radially inward. Each rotating plate 51 has two rotating cores 52 connected to its end. The end of the return guide pin 21 is located near the rotating core 52.

[0037] like Figure 3-5 As shown, the other end of the rotating plate 51 is placed on the end face of the turntable 5 facing the fixed mold 1, and the turntable 5 and the rotating plate 51 are fixedly connected by fasteners 7. One end of the rotating plate 51 is set on the turntable 5, and the end of this end is set close to the center of the turntable 5. The rotating plate 51 is fixedly connected to the turntable 5 near the center of the turntable 5 and near the outer edge of the turntable 5 by fasteners 7.

[0038] like Figure 5-7 As shown, one end of the rotating plate 51 is connected to a rotating core fixing block 53. The rotating core 52 fixing plate has a positioning countersunk hole 53a at the end facing the rotating plate 51. The rotating core 52 is rod-shaped and has a large diameter end 52a and a small diameter end 52b. The diameter of the large diameter end 52a is larger than the diameter of the small diameter end 52b. The large diameter end 52a is located between the rotating plate 51 and the rotating core 52 fixing plate and abuts against the positioning countersunk hole 53a radially along the main shaft 3. It is pressed onto the rotating plate 51 by the rotating core 52 fixing plate. The small diameter end 52b passes through the rotating plate 51. The rotating core 52 fixing plate is connected to the aforementioned bolt 8 arranged radially along the main shaft 3. The bolt 8 presses the other end of the rotating core 52 fixing plate onto the rotating plate 51. The bolt 8 is arranged between the two rotating cores 52.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A multi-station mold, comprising a fixed mold (1), a moving mold (2), and a main shaft (3), wherein the fixed mold (1) and the moving mold (2) are closed to form multiple forming cavities (4), the main shaft (3) passes horizontally through the moving mold (2) and is capable of axial sliding and circumferential rotation relative to the moving mold (2), and a turntable (5) is fixed to one end of the main shaft (3) facing the fixed mold (1), characterized in that, The turntable (5) is connected to a plurality of rotating plates (51) that are evenly distributed in the circumferential direction and are in the shape of long strips. Each rotating plate (51) has a rotating core (52) that is columnar and radially arranged along the main shaft (3) fixed at one end. Both the fixed mold (1) and the moving mold (2) have a relief opening (6) for the rotating plate (51) to be placed. The wall of the relief opening (6) is close to the outer wall of the rotating plate (51). The moving mold (2) is fixed with a return guide pin (21) that is corresponding to the rotating plate (51) and is axially arranged along the main shaft (3). The return guide pin (21) is located close to the molding cavity (4). When the moving mold (2) and the fixed mold (1) are in the mold-closed state, a plurality of rotating cores (52) are respectively inserted into a plurality of molding cavities (4), the rotating plate (51) is located in the corresponding relief opening (6) and the rotating plate (51) is sleeved on the return guide pin (21).

2. The multi-station mold according to claim 1, characterized in that, The rotating plate (51) has a positioning hole (51a) along the main shaft (3) axially. The positioning hole (51a) has a flared guide surface (51b) facing the opening of the moving mold (2). The outer wall of the end of the return guide pin (21) contracts radially inward.

3. The multi-station mold according to claim 1 or 2, characterized in that, Each rotating plate (51) has two rotating cores (52) connected to its end, and the return guide pin (21) is located near one end of the rotating core (52).

4. The multi-station mold according to claim 1 or 2, characterized in that, The other end of the rotating plate (51) is placed on the end face of the turntable (5) facing the fixed mold (1), and the turntable (5) and the rotating plate (51) are fixedly connected by fasteners (7).

5. The multi-station mold according to claim 3, characterized in that, One end of the rotating plate (51) is connected to a rotating core fixing block (53). The rotating core (52) fixing plate has a positioning countersunk hole (53a) at the end facing the rotating plate (51). The rotating core (52) is rod-shaped and has a large diameter end (52a) and a small diameter end (52b). The diameter of the large diameter end (52a) is larger than the diameter of the small diameter end (52b). The large diameter end (52a) is located between the rotating plate (51) and the rotating core (52) fixing plate and abuts against the positioning countersunk hole (53a) radially along the main shaft (3) and is pressed onto the rotating plate (51) by the rotating core (52) fixing plate. The small diameter end (52b) passes through the rotating plate (51).

6. The multi-station mold according to claim 5, characterized in that, The rotating core (52) fixing plate is connected to a bolt (8) arranged radially along the main shaft (3). The bolt (8) presses the other end of the rotating core (52) fixing plate onto the rotating plate (51). The bolt (8) is arranged between the two rotating cores (52).

7. The multi-station mold according to claim 1 or 2, characterized in that, One end of the rotating plate (51) is disposed on the turntable (5), and the end of the plate is disposed near the center of the turntable (5). The rotating plate (51) is fixed to the turntable (5) near the center of the turntable (5) and near the outer edge of the turntable (5) by fasteners (7).

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