Shared mold base multi-cavity insert integrated interchange mechanism

Abstract

The present invention belongs to the technical field of molds, and particularly relates to an integrated interchange mechanism for a shared mold base with multiple cavity inserts. In the present invention, there is a middle mold base plate, an injection molded part is arranged above the middle mold base plate, and a bottom fixing plate is arranged below the middle mold base plate. By setting a combined interchangeable integrated insert assembly for injection molding medical pipette tips, the present invention adopts an insert integrated structure with the same external structure size. The internal molded parts can be replaced according to the requirements of different products to achieve mutual matching. Different products can use the same mold base to complete multi-cavity interchange. During the production process of the whole machine, the product type and size can be quickly changed according to the market product demand, and the insert integrated design can efficiently meet the market demand. When a single part is worn or scrapped, a spare part can be used for quick replacement to improve production efficiency. For small-scale manufacturers, using a set of mold bases to produce multiple products can greatly save the cost of producing multiple sets of mold bases.

Description

Technical Field

[0001] The present invention belongs to the technical field of molds and relates to an integrated interchange mechanism for a shared mold base and multi-cavity inserts. Background Art

[0002] In the production process of medical pipette tip molds, due to the mutual matching between the mold base and the inserts, the processing accuracy is high and the processing cost is high. When producing different products, multiple mold bases are required for production. It is difficult to use the same mold base to produce different products, and it is difficult to achieve mutual matching, resulting in a relatively high overall production cost.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a high-precision pipette tip processing injection mold [Application No.: 202111411047.3], which includes a mold fixed base. Two lower mold base heightening bases are integrally and fixedly connected to the upper end of the mold fixed base. The sliding mold module includes: heat dissipation air holes and countersunk holes. Countersunk holes are also formed on the upper surface of the sliding mold module. The upper mold module includes: calibration holes and pouring holes. A pouring hole is formed in the middle of the upper mold module. In this solution, the sliding mold module is pushed between the bottom mold and the upper mold module by the demolding double-axis cylinder until it abuts against the inner wall of one side of the sliding mold limiting groove. The upper mold module is inserted onto the calibration rod through the calibration holes. When it reaches the bottom, the buffer spring is compressed. By flipping the fixed clamp, the air in the gap space is discharged through the capping holes. However, in the injection molding production process, it is still difficult to use the same mold base to produce different products and achieve mutual matching, and there is a defect of relatively high overall production cost. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated interchange mechanism for a shared mold base and multi-cavity inserts in view of the above problems.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An integrated interchange mechanism for a shared mold base and multi-cavity inserts includes a middle mold base plate. An injection molded part is arranged above the middle mold base plate. A bottom fixing plate is arranged below the middle mold base plate. A material recovery part is arranged between the bottom fixing plate and the middle mold base plate. A plurality of insert placement cavity grooves symmetrically arranged along the center line of the middle mold base plate are arranged in the middle mold base plate. A combined interchangeable integrated insert assembly is arranged in the insert placement cavity grooves. The injection molded part and the material recovery part are respectively corresponding to the positions of the combined interchangeable integrated insert assembly.

[0007] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the combined interchangeable integrated insert assembly includes a feeding insert forming cylinder disposed in the insert placement cavity groove. An interchangeable pipette tip forming seat is provided in the feeding insert forming cylinder. The interchangeable pipette tip forming seat extends into the feeding insert forming cylinder, and a pipette tip forming chamber is formed between the interchangeable pipette tip forming seat and the feeding insert forming cylinder.

[0008] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, a forming seat fixing member is provided at the bottom of the feeding insert forming cylinder. The interchangeable pipette tip forming seat is engaged and cooperated with the forming seat fixing member, and the forming seat fixing member corresponds to the position of the pipette tip forming chamber.

[0009] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the forming seat fixing member includes a fixed clamping sleeve disposed at the bottom of the feeding insert forming cylinder. The interchangeable pipette tip forming seat and the feeding insert forming cylinder are respectively engaged and cooperated with the fixed clamping sleeve.

[0010] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, a feeding inner insert portion is provided in the feeding insert forming cylinder. The feeding inner insert portion corresponds to the position of the interchangeable pipette tip forming seat and also corresponds to the position of the injection molded part.

[0011] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the feeding inner insert portion includes a feeding inner sleeve disposed in the feeding insert forming cylinder. The interchangeable pipette tip forming seat passes through the feeding inner sleeve, and there is a gap between the interchangeable pipette tip forming seat and the feeding inner sleeve.

[0012] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the material recovery portion includes a first lower template and a second lower template disposed between the bottom fixing plate and the middle mold base plate. A plurality of material recovery chambers are provided in the first lower template, and the material recovery chambers are connected to the pipette tip forming chamber through a feeding member.

[0013] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the feeding member includes a plurality of inclined channels disposed in the feeding insert forming cylinder. A plurality of middle feeding cavities are provided in the middle mold base plate, and a plurality of lower feeding cavities are provided in the first lower template. The lower feeding cavities are communicated with the material recovery chambers.

[0014] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the injection molded part includes an injection molding main board disposed above the middle mold base plate. A plurality of injection molding main holes symmetrically arranged along the center line of the injection molding main board are provided in the injection molding main board, and a flow dividing portion is provided between the injection molding main board and the middle mold base plate.

[0015] In the above-mentioned shared mold base multi-cavity insert integrated interchange mechanism, the shunt part includes a shunt frame and a shunt plate arranged between the injection main board and the middle mold base plate. A material-containing chamber is provided in the shunt frame, and a number of shunt holes are provided in the shunt plate. The shunt holes are communicated with the material-containing chamber. A number of connecting channels are provided in the middle mold base plate. One end of the connecting channel is connected to the shunt hole, and the other end is connected to the feeding insert forming cylinder.

[0016] Compared with the existing technology, the advantages of the present invention are as follows:

[0017] 1. The present invention uses a combined interchangeable integrated insert assembly to injection mold the medical pipette tip. The combined interchangeable integrated insert assembly adopts an insert integrated structure with the same external structure size. The internal forming parts can be replaced according to the requirements of different products to achieve mutual matching. Different products can use the same mold base to complete multi-cavity interchange. The material recovery part can recycle the redundant molten material, reducing the production cost. During the production process, the whole machine can quickly change the product type and size according to the market product demand, efficiently respond to the market demand with the insert integrated design. When a single part is worn or scrapped, a spare part can be used for quick replacement to improve the production efficiency. For small-scale manufacturers, using a set of mold bases to produce multiple products can enhance the ability to cope with risks and greatly save the cost of producing multiple sets of mold bases.

[0018] 2. During the injection molding process of the present invention, before the molten material enters the pipette tip forming chamber, the molten material is first subjected to alignment injection through the feeding inner nest. There is a gap between the interchangeable pipette tip forming seat and the feeding inner nest to ensure that the material can enter smoothly. At the same time, the feeding inner nest can also assist in forming the upper structure of the medical pipette tip, and the structure is compact and reasonable.

[0019] 3. The present invention is provided with a fixed clamping sleeve to fix the interchangeable pipette tip forming seat, ensuring that the interchangeable pipette tip forming seat does not shake or slide during the injection molding process, improving the injection molding accuracy.

[0020] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention.

[0022] Figure 2 is a partial structural diagram of the present invention.

[0023] Figure 3 is a partial schematic diagram of the present invention in another direction.

[0024] Figure 4 is Figure 3 The sectional view taken along line A-A in the middle.

[0025] In the figure: middle mold base plate 1, injection molded part 2, bottom fixing plate 3, material recovery part 4, insert placement cavity 5, combined interchangeable integrated insert assembly 6, feed insert forming cylinder 7, interchangeable pipette tip forming seat 8, pipette tip forming chamber 9, forming seat fixing part 10, fixed clamping sleeve 11, feed inner embedded part 12, feed inner nest 13, first lower template 14, second lower template 15, material recovery chamber 16, material conveying part 17, inclined channel 18, middle material conveying cavity 19, lower material conveying cavity 20, injection main board 21, injection main hole 22, shunt part 23, shunt frame 24, shunt plate 25, material containing chamber 26, shunt hole 27, connecting channel 28. Specific embodiments

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] As Figures 1-4 shown, a shared mold base multi-cavity insert integrated interchange mechanism includes a middle mold base plate 1, an injection molded part 2 is arranged above the middle mold base plate 1, a bottom fixing plate 3 is arranged below the middle mold base plate 1, a material recovery part 4 is arranged between the bottom fixing plate 3 and the middle mold base plate 1, a plurality of insert placement cavities 5 symmetrically arranged along the center line of the middle mold base plate 1 are arranged in the middle mold base plate 1, a combined interchangeable integrated insert assembly 6 is arranged in the insert placement cavity 5, and the injection molded part 2 and the material recovery part 4 are respectively corresponding to the position of the combined interchangeable integrated insert assembly 6.

[0028] In this embodiment, before injection molding, the injection molded part 2 and the material recovery part 4 are respectively moved closer to the middle mold plate 1, the combined interchangeable integrated insert assembly 6 is inserted into the insert placement cavity 5, the top of the combined interchangeable integrated insert assembly 6 corresponds to the position of the injection molded part 2, and the bottom of the combined interchangeable integrated insert assembly 6 corresponds to the position of the material recovery part 4. The molten material is injected into the combined interchangeable integrated insert assembly 6 through the injection molded part 2, and the combined interchangeable integrated insert assembly 6 is used to injection mold the medical pipette tip. The combined interchangeable integrated insert assembly 6 adopts an insert integrated structure with the same external structure size. The internal molded parts can be replaced according to the requirements of different products to achieve mutual matching. Different products can use the same mold base to complete multi-cavity interchange. The material recovery part 4 can recycle the excess molten material to reduce production costs. During the production process, the whole machine can quickly change the product type and size according to the market product demand, and efficiently respond to the market demand with the insert integrated design. When a single part is worn or scrapped, a spare part can be used for quick replacement to improve production efficiency. For small-scale manufacturers, using one mold base to produce multiple products can enhance the ability to cope with risks and greatly save the cost of producing multiple mold bases.

[0029] Combined Figures 1-4 As shown, the combined interchangeable integrated insert assembly 6 includes a feed insert forming cylinder 7 disposed in the insert placement cavity 5. An interchangeable pipette tip forming seat 8 is provided in the feed insert forming cylinder 7. The interchangeable pipette tip forming seat 8 extends into the feed insert forming cylinder 7, and a pipette tip forming chamber 9 is formed between the interchangeable pipette tip forming seat 8 and the feed insert forming cylinder 7.

[0030] Specifically, during the injection molding process, the feed insert forming cylinder 7 and the interchangeable pipette tip forming seat 8 cooperate to form a complete cavity for the medical pipette tip. The molten material enters the cavity through the feed insert forming cylinder 7 to complete the molding of the medical pipette tip. When it is necessary to produce medical pipette tips with different specified lengths, only the corresponding interchangeable pipette tip forming seat 8 needs to be replaced, and it cooperates with the feed insert forming cylinder 7 to form the required cavity. The internal molded parts can be replaced according to the requirements of different products to achieve mutual matching. Different products can use the same mold base to complete multi-cavity interchange. During the production process, the whole machine can quickly change the product type and size according to the market product demand, and efficiently respond to the market demand with the insert integrated design. When a single part is worn or scrapped, a spare part can be used for quick replacement to improve production efficiency. For small-scale manufacturers, using one mold base to produce multiple products can enhance the ability to cope with risks and greatly save the cost of producing multiple mold bases.

[0031] Combined Figure 1 、 Figure 4As shown, a molding seat fixing part 10 is provided at the bottom of the feed insert molding cylinder 7, and the interchangeable pipette tip molding seat 8 is snap-fitted with the molding seat fixing part 10, and the molding seat fixing part 10 corresponds to the position of the pipette tip molding chamber 9.

[0032] In this embodiment, the molding seat fixing member 10 is used to fix the interchangeable pipette tip molding seat 8 to ensure that the interchangeable pipette tip molding seat 8 does not shake or slide during the injection molding process, thereby improving the accuracy of the injection molding.

[0033] The molding seat fixing part 10 includes a fixed clamping sleeve 11 arranged at the bottom of the feed insert molding cylinder 7, and the interchangeable pipette tip molding seat 8 and the feed insert molding cylinder 7 are respectively engaged with the fixed clamping sleeve 11.

[0034] In this embodiment, the fixing sleeve 11 is used to fix the interchangeable pipette tip molding seat 8, ensuring that the interchangeable pipette tip molding seat 8 does not shake or slide during the injection molding process, thereby improving the accuracy of the injection molding.

[0035] Combine Figure 4 As shown, a feed insert molding cylinder 7 is provided with a feed embedded portion 12 , and the feed embedded portion 12 corresponds to the position of the interchangeable pipette tip molding seat 8 , and the feed embedded portion 12 corresponds to the position of the injection molded part 2 .

[0036] In this embodiment, during the injection molding process, before the molten material enters the pipette tip molding chamber 9, the molten material is first subjected to counter-injection molding through the feed embedded part 12. At the same time, the feed embedded part 12 can also assist in molding the upper structure of the medical part pipette tip, and the structure is compact and reasonable.

[0037] The feed embedded portion 12 includes a feed inner nest 13 arranged in the feed insert molding cylinder 7, and the interchangeable pipette tip molding seat 8 passes through the feed inner nest 13 and a gap is provided between the interchangeable pipette tip molding seat 8 and the feed inner nest 13.

[0038] In this embodiment, during the injection molding process, before the molten material enters the pipette tip molding chamber 9, the molten material is first subjected to counter-injection molding through the feed inner nest 13. A gap is provided between the interchangeable pipette tip molding seat 8 and the feed inner nest 13 to ensure that the material can enter smoothly. At the same time, the feed inner nest 13 can also assist in molding the upper structure of the medical pipette tip, and the structure is compact and reasonable.

[0039] The material recovery part 4 includes a first lower template 14 and a second lower template 15 arranged between the bottom fixed plate 3 and the middle mold frame plate 1. The first lower template 14 is provided with a plurality of material recovery chambers 16. The material recovery chambers 16 are connected to the pipette tip forming chamber 9 through a material feeding part 17.

[0040] In this embodiment, the second lower template 15 is used to fix the interchangeable pipette tip forming seat 8. After the material in the material recovery chamber 16 in the first lower template 14 completely fills the cavity after incorporating the material, it enters the material recovery chamber 16. After injection molding and mold opening, the redundant material can be recycled to reduce production costs.

[0041] Combined with Figure 4 As shown, the feeding member 17 includes a plurality of inclined channels 18 provided in the feeding insert forming cylinder 7. A plurality of middle feeding cavities 19 are provided in the middle mold base plate 1. A plurality of lower feeding cavities 20 are provided in the first lower template 14, and the lower feeding cavities 20 are communicated with the material recovery chamber 16.

[0042] In this embodiment, the inclined channels 18 are connected to the pipette tip forming cavity 9. During the injection molding process, after the molten material fills the pipette tip forming cavity 9, the redundant part will enter the middle feeding cavity 19 and the lower feeding cavity 20 through the inclined channels 18, and then enter the material recovery chamber 16. After injection molding and mold opening, the redundant material can be recycled to reduce production costs.

[0043] Combined with Figure 1 、 Figure 2 As shown, the injection molded part 2 includes an injection molding main board 21 provided above the middle mold base plate 1. A plurality of injection molding main holes 22 symmetrically arranged along the center line of the injection molding main board 21 are provided in the injection molding main board 21. A flow splitting part 23 is provided between the injection molding main board 21 and the middle mold base plate 1.

[0044] In this embodiment, during the injection molding process, the molten material is injected into the flow splitting part 23 through the injection molding main holes 22 in the injection molding main board 21, and is split by the flow splitting part 23 to improve the injection molding rate.

[0045] Combined with Figures 1-3 As shown, the flow splitting part 23 includes a flow splitting frame 24 and a flow splitting plate 25 provided between the injection molding main board 21 and the middle mold base plate 1. A material containing chamber 26 is provided in the flow splitting frame 24. A plurality of flow splitting holes 27 are provided in the flow splitting plate 25. The flow splitting holes 27 are communicated with the material containing chamber 26. A plurality of connecting channels 28 are provided in the middle mold base plate 1. One end of the connecting channel 28 is connected to the flow splitting hole 27, and the other end is connected to the feeding insert forming cylinder 7.

[0046] In this embodiment, during the injection molding process, the molten material is split by the flow splitting frame 24 and the flow splitting plate 25. The material containing chamber 26 is used to temporarily hold the injection molding material flow. After being split by the flow splitting holes 27, the molten material is sent into the feeding insert forming cylinder 7 through the connecting channels 28 for injection molding.

[0047] The working principle of the present invention is as follows:

[0048] During the injection molding process, the molten material is injected through the main injection hole 22 in the injection molding main board 21 into the flow distribution frame 24 and the flow distribution plate 25 for flow distribution. The material storage chamber 26 is used to temporarily accommodate the injected material flow. After being distributed through the flow distribution holes 27, the molten material is then sent into the feeding insert molding cylinder 7 through the connecting channel 28 for injection molding.

[0049] During the injection molding process, the feeding insert molding cylinder 7 and the interchangeable pipette tip molding seat 8 cooperate to form a complete medical pipette tip cavity. The molten material enters the cavity through the feeding insert molding cylinder 7 to complete the molding of the medical pipette tip. When it is necessary to produce medical pipette tips with different specifications and lengths, only the corresponding interchangeable pipette tip molding seat 8 needs to be replaced, and it cooperates with the feeding insert molding cylinder 7 to form the cavity of the required specification. Adopting an insert integrated structure, the external structure size is the same, and the internal molding parts can be replaced according to the requirements of different products to achieve mutual matching. Different products can use the same mold base to complete multi-cavity interchange. During the production process of the whole machine, the product type and size can be quickly changed according to the market product demand, and the market demand can be efficiently responded to with the insert integrated design. When a single part is worn or scrapped, the spare part can be quickly replaced to improve production efficiency. For small-scale manufacturers, using a set of mold bases to produce multiple products can enhance the ability to cope with risks and greatly save the cost of producing multiple mold bases.

[0050] The fixed clamping sleeve 11 is used to fix the interchangeable pipette tip molding seat 8 to ensure that the interchangeable pipette tip molding seat 8 does not shake or slide during the injection molding process, thereby improving the injection molding accuracy.

[0051] During the injection molding process, before the molten material enters the pipette tip molding chamber 9, the molten material is first subjected to alignment injection through the feeding inner nested part 13. There is a gap between the interchangeable pipette tip molding seat 8 and the feeding inner nested part 13 to ensure that the material can enter smoothly. At the same time, the feeding inner nested part 13 can also assist in forming the upper structure of the medical pipette tip, and the structure is compact and reasonable.

[0052] The second lower template 15 is used to fix the interchangeable pipette tip molding seat 8. After the material in the material recovery chamber 16 in the first lower template 14 completely fills the cavity, it enters the material recovery chamber 16. After the injection molding is completed and the mold is opened, the excess material can be recycled to reduce the production cost.

[0053] The inclined channel 18 is connected to the pipette tip molding chamber 9. During the injection molding process, after the molten material fills the pipette tip molding chamber 9, the excess part will enter the middle material conveying cavity 19 and the lower material conveying cavity 20 through the inclined channel 18, and then enter the material recovery chamber 16. After the injection molding is completed and the mold is opened, the excess material can be recycled to reduce the production cost.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without departing from the spirit of the present invention.

[0055] Although terms such as middle mold base plate 1, injection molded part 2, bottom fixing plate 3, material recovery part 4, insert placement cavity 5, combined interchangeable integrated insert assembly 6, feeding insert forming cylinder 7, interchangeable pipette tip forming seat 8, pipette tip forming chamber 9, forming seat fixing part 10, fixed clamping sleeve 11, feeding inner embedded part 12, feeding inner nest 13, first lower template 14, second lower template 15, material recovery chamber 16, material conveying part 17, inclined channel 18, middle material conveying cavity 19, lower material conveying cavity 20, injection molding main board 21, injection molding main hole 22, shunt part 23, shunt frame 24, shunt plate 25, material containing cavity 26, shunt hole 27, connecting channel 28 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention, and interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A multi-cavity insert integrated interchange mechanism for a shared mold base, comprising a middle mold base plate (1), characterized in that, Above the middle mold plate (1), there is an injection molded part (2). Below the middle mold plate (1), there is a bottom fixing plate (3). Between the bottom fixing plate (3) and the middle mold plate (1), there is a material recovery part (4). Inside the middle mold plate (1), there are several insert placement cavities (5) symmetrically arranged along the center line of the middle mold plate (1). Inside the insert placement cavities (5), there are combined interchangeable integrated insert assemblies (6). The injection molded part (2) and the material recovery part (4) are respectively corresponding to the positions of the combined interchangeable integrated insert assemblies (6). The combined interchangeable integrated insert assembly (6) includes a feeding insert forming cylinder (7) arranged inside the insert placement cavity (5). Inside the feeding insert forming cylinder (7), there is an interchangeable pipette tip forming seat (8). The interchangeable pipette tip forming seat (8) extends into the feeding insert forming cylinder (7). Between the interchangeable pipette tip forming seat (8) and the feeding insert forming cylinder (7), there is a pipette tip forming chamber (9). At the bottom of the feeding insert forming cylinder (7), there is a forming seat fixing part (10). The interchangeable pipette tip forming seat (8) is engaged and fitted with the forming seat fixing part (10). The forming seat fixing part (10) corresponds to the position of the pipette tip forming chamber (9). The forming seat fixing part (10) includes a fixed clamping sleeve (11) arranged at the bottom of the feeding insert forming cylinder (7). The interchangeable pipette tip forming seat (8) and the feeding insert forming cylinder (7) are respectively engaged and fitted with the fixed clamping sleeve (11). Inside the feeding insert forming cylinder (7), there is a feeding inner embedded part (12). The feeding inner embedded part (12) corresponds to the position of the interchangeable pipette tip forming seat (8). The feeding inner embedded part (12) corresponds to the position of the injection molded part (2). The feeding inner embedded part (12) includes a feeding inner sleeve (13) arranged inside the feeding insert forming cylinder (7). The interchangeable pipette tip forming seat (8) passes through the feeding inner sleeve (13), and there is a gap between the interchangeable pipette tip forming seat (8) and the feeding inner sleeve (13).

2. The integrated interchange mechanism of multi-cavity inserts for shared die sets according to claim 1, characterized in that The material recovery part (4) includes a first lower template (14) and a second lower template (15) arranged between the bottom fixing plate (3) and the middle mold plate (1). Inside the first lower template (14), there are several material recovery chambers (16). Between the material recovery chambers (16) and the pipette tip forming chamber (9), there is a material conveying part (17) connected therebetween.

3. The integrated interchange mechanism of the shared mold base multi-cavity insert according to claim 2, characterized in that, The material conveying part (17) includes several inclined channels (18) arranged inside the feeding insert forming cylinder (7). Inside the middle mold plate (1), there are several middle material conveying cavities (19). Inside the first lower template (14), there are several lower material conveying cavities (20). The lower material conveying cavities (20) are communicated with the material recovery chambers (16).

4. The integrated interchange mechanism for multi-cavity inserts of a shared mold base according to claim 3, characterized in that, The injection molded part (2) includes an injection main board (21) disposed above the middle mold base plate (1). A number of injection main holes (22) symmetrically arranged along the center line of the injection main board (21) are provided in the injection main board (21). A flow splitting part (23) is provided between the injection main board (21) and the middle mold base plate (1).

5. The integrated interchange mechanism of multi-cavity inserts of the shared mold base according to claim 4, characterized in that, The flow splitting part (23) includes a flow splitting frame (24) and a flow splitting plate (25) disposed between the injection main board (21) and the middle mold base plate (1). A material containing chamber (26) is provided in the flow splitting frame (24). A number of flow splitting holes (27) are provided in the flow splitting plate (25). The flow splitting holes (27) are communicated with the material containing chamber (26). A number of connecting channels (28) are provided in the middle mold base plate (1). One end of the connecting channel (28) is connected to the flow splitting hole (27), and the other end is connected to the feeding insert forming cylinder (7).

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