A multi-product injection molding method, ejection mechanism and injection molding device

Abstract

The application discloses a multi-product injection molding method, an ejection mechanism and an injection molding device, and relates to the field of mold ejection and molding. The technical scheme comprises the following steps: S1, processing a mold according to an injection product; S2, adjusting an injection molding machine and the mold; S3, setting an ejection assembly, wherein the ejection assembly comprises an ejection assembly A and an ejection assembly B, and the ejection assembly A and the ejection assembly B can eject products in different directions; S4, setting an ejection distance according to needs, and adjusting the driving force supply of the ejection assembly A and the ejection assembly B; and S5, performing injection molding processing of the product. The application has the beneficial effect that the method effectively guarantees the independence of the ejection operation of two sets of products simultaneously injected, reduces the processing difficulty, and realizes the simultaneous injection and ejection of two sets of different products. Through the improvement of the oil circuit and the control of the oil cylinder flow, the oil cylinders in the two ejection assemblies are synchronously completed in different needs.

Description

Technical Field

[0001] This invention relates to the field of mold ejection and molding, specifically to a multi-product injection molding method, ejection mechanism, and injection molding device. Background Technology

[0002] For plastic products, if the product size is similar and the ejection direction is the same, one set of molds can be used to make and shape them. However, if the product size is similar but the ejection direction is different, two sets of molds are required to make and shape them. This takes longer and all processes need to be carried out twice, resulting in higher costs.

[0003] Taking grouped products as an example, such as parts installed inside pipes, there are often situations where product A needs to be assembled with product B. The two products are often similar in size, but due to the assembly structure, their ejection directions during injection molding are different, thus causing the aforementioned problem. Product A and product B need to be processed separately to meet the requirements. Summary of the Invention

[0004] To address one of the shortcomings of existing technologies, this invention provides a multi-product injection molding method, an ejection mechanism, and an injection molding device, solving the problem of simultaneously processing two products with different ejection directions during the injection molding process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-product injection molding method, comprising the following steps:

[0006] S1. For products that need to be injection molded, the shapes corresponding to different products are distributed and processed on the same mold;

[0007] S2. Adjust the injection molding machine and the mold so that the mold is placed horizontally;

[0008] S3. For the products on the mold, ejection components are set respectively. The ejection components include ejection component A and ejection component B. Ejection component A and ejection component B can eject the products in different directions.

[0009] S4. Set the ejection distance as needed and adjust the driving force supply to the ejection component A and ejection component B to ensure that the ejection component A and ejection component B can complete the ejection operation simultaneously within the allowable time error range.

[0010] S5. After the above debugging is completed, proceed with the injection molding process of the product.

[0011] Preferably, in step S1, products A and B are processed on the same mold, wherein product A is ejected vertically and product B is ejected at an angle.

[0012] In step S3, ejector component A is set to correspond to product A, and ejector component A can eject in the vertical direction; ejector component B is set to correspond to product B, and ejector component B can eject in the diagonal direction.

[0013] Preferably, in step S3, both ejection assembly A and ejection assembly B use hydraulic cylinders as the power source for the ejection operation;

[0014] In step S4, both ejector assembly A and ejector assembly B are supplied with hydraulic oil by the main oil supply source. The main oil supply source is provided with oil circuit A and oil circuit B respectively for ejector assembly A and ejector assembly B. A flow regulating valve A is installed between oil circuit A and the main oil supply source, and a flow regulating valve B is installed between oil circuit B and the main oil supply source.

[0015] Preferably, the setting of the ejection distance in step S4 includes:

[0016] In state one, the ejection distances of ejection component A and ejection component B are equal, and the ejection speeds of ejection component A and ejection component B are equal.

[0017] Under the ejection distance requirement of State 1, with the actual flow rates obtained by the hydraulic cylinders in ejection assembly A and ejection assembly B being Q, respectively... a and Q b By adjusting the output flow rate at the locations of flow control valves A and B, the desired Q is achieved. a =Q b ;

[0018] Refer to the formula for adjustment:

[0019] ΔF=F a -F b

[0020] Where ΔF is the pressure difference generated by flow control valve A and flow control valve B, F a To achieve the ejection pressure of the hydraulic cylinder in ejector assembly A, F b The ejection pressure of the hydraulic cylinder in ejector component B;

[0021] F a =F a1 +F a2 +F a3

[0022] F b =F b1 +F b2 +F b3

[0023] Among them, F a1 For the clamping force of product A; F a2 F is the frictional force generated by the moving parts of the mold for product A.a3 The force of gravity on the moving parts of the mold for product A on the injection molding machine;

[0024] F b1 For the clamping force of product B, F b2 F is the frictional force generated by the moving parts of the mold for product B. b3 Let g be the weight of the moving parts of the mold for product B on the injection molding machine.

[0025] Preferably, the setting of the ejection distance in step S4 further includes:

[0026] State 2: The ejection distance of ejection component A and ejection component B is set as the condition that the bodies of product A and product B are ejected to the same horizontal height; when this condition is met, the ejection distance of ejection component A is a, and the ejection distance of ejection component B is b.

[0027] Under the ejection distance requirement of state two, the formula is satisfied.

[0028] a=cosα·b

[0029] α is the angle between the directions of motion of ejector component A and ejector component B;

[0030] The actual hydraulic oil flow rates obtained by the hydraulic cylinders of ejector assembly A and ejector assembly B satisfy the following conditions:

[0031] cosα·Q b =Q a

[0032] Where α is the angle between the ejection directions of ejection component A and ejection component B, Q a To determine the actual flow rate obtained by the hydraulic cylinder of component A, Q b The actual flow rate obtained by the hydraulic cylinder of ejector component B.

[0033] An injection molding ejection structure, employing the ejection method described above, is connected to the rear mold assembly; comprising:

[0034] Ejection component A includes hydraulic cylinder A and matching components. The hydraulic cylinder A moves in a vertical direction and can be linked with its corresponding matching components to eject product A in a vertical direction.

[0035] Ejection component B includes hydraulic cylinder B, which moves in an inclined direction. Hydraulic cylinder B can be linked with its corresponding supporting components to eject product B in an inclined direction.

[0036] The cylinder bodies of cylinders A and B are respectively fixedly connected to the rear mold assembly.

[0037] Preferably, the rear mold assembly includes a rear template, a square iron assembly, a pad assembly, and a base plate arranged sequentially from top to bottom;

[0038] The square iron assembly consists of several square irons distributed on the lower side of the rear template; the pad assembly consists of two pads, which are set at the positions of product A and product B respectively; the base plate is an integral board.

[0039] Preferably, each of the aforementioned supporting components includes:

[0040] The ejector plate assembly, located at the movable end of its corresponding hydraulic cylinder, includes an ejector panel and an ejector base plate. The ejector panel is located above the ejector base plate, and the ejector panel and ejector base plate are fixedly connected by a cylinder connecting block. The cylinder connecting block is fixedly connected to the movable end of the hydraulic cylinder. An ejector limiter is provided on the ejector panel.

[0041] The ejector rod assembly includes a return pin assembly, a center support assembly, a guide rod assembly, and an ejector pin assembly disposed on the ejector plate assembly; the lower end of the guide rod in the guide rod assembly is connected to the ejector plate assembly, and the upper end is connected to a straight ejector or an angled ejector.

[0042] Preferably, cylinders A and B are connected to the same oil source, and their oil circuits include:

[0043] The oil collector is equipped with an interface that connects to the hydraulic oil source.

[0044] Pipeline assembly A has one end connected to the oil outlet on one side of the oil collector, and the other end connected to the chamber of cylinder A.

[0045] Pipeline assembly B has one end connected to the oil outlet on the other side of the oil collector, and the other end connected to the chamber of cylinder B.

[0046] Flow regulating valves are respectively installed on the passages of pipeline group A and pipeline group B.

[0047] An injection molding apparatus includes a front mold assembly and a rear mold assembly, wherein the rear mold assembly is provided with an ejection mechanism as described above.

[0048] Compared with existing technologies, this solution offers the following advantages: It effectively ensures the independence of the ejection operations for two sets of products being simultaneously injection molded, reducing processing difficulty and enabling the simultaneous injection and ejection of two different products. Furthermore, through improvements to the hydraulic circuit and control of the cylinder flow, the cylinders in the two ejection components can synchronously complete the ejection process under different requirements. This lays the foundation for synchronizing subsequent robot product handling and production line speed control during automated processing. It eliminates the problem of inconsistent ejection speeds due to different ejection directions of the two sets of products, significantly reducing the difficulty of debugging other equipment during subsequent production. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the ejection mechanism structure according to an embodiment of this application;

[0050] Figure 2 This is an enlarged schematic diagram of the ejector rod assembly according to an embodiment of this application;

[0051] Figure 3 This is an exploded view of the ejection mechanism according to an embodiment of this application;

[0052] Figure 4 This is a schematic diagram of the oil circuit of the ejection mechanism in an embodiment of this application.

[0053] In the picture:

[0054] 100. Rear mold assembly; 101. Rear template; 102. Square iron assembly; 103. Pad assembly; 104. Base plate; 200. Product A; 300. Product B;

[0055] 1. Ejector assembly A; 11. Hydraulic cylinder A; 2. Ejector assembly B; 21. Hydraulic cylinder B;

[0056] 31. Ejector panel; 32. Ejector base plate; 33. Hydraulic cylinder connecting block; 34. Ejector limit component;

[0057] 41. Backing needle assembly; 42. Middle support assembly; 43. Guide rod assembly; 44. Ejector pin assembly; 45. Straight ejector; 46. Angled ejector; 47. Sliding sleeve assembly; 48. Guide rod connecting seat;

[0058] 5. Oil collector; 51. Pipeline group A; 52. Pipeline group B; 53. Flow regulating valve; 54. Interface. Detailed Implementation

[0059] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0060] This application provides the following technical solution:

[0061] A multi-product injection molding method, comprising the steps of:

[0062] S1. For products that need to be injection molded, the shapes of products A and B are processed on the same mold, with product A ejected vertically and product B ejected at an angle.

[0063] S2. Adjust the injection molding machine and mold so that the mold is placed horizontally;

[0064] S3. For each product on the mold, ejection components are set up. The ejection components include ejection component A and ejection component B. Ejection component A and ejection component B can eject the product in different directions. Ejection component A is set up for product A and can eject in the vertical direction. Ejection component B is set up for product B and can eject in the oblique direction. Both ejection component A and ejection component B use hydraulic cylinders as the power source for the ejection operation.

[0065] S4. Set the ejection distance as needed and adjust the driving force supply to ejection component A and ejection component B to ensure that ejection component A and ejection component B complete the ejection operation simultaneously within the allowable time error range; both ejection component A and ejection component B are supplied with hydraulic oil by the main oil supply source. The main oil supply source is equipped with oil circuit A and oil circuit B respectively for ejection component A and ejection component B. A flow regulating valve A is installed between oil circuit A and the main oil supply source, and a flow regulating valve B is installed between oil circuit B and the main oil supply source.

[0066] S5. After the above debugging is completed, proceed with the injection molding process of the product.

[0067] To address the problems in the background technology, and considering the need to save on manufacturing and injection molding costs, shorten production time, and keep the injection molding machine equipment unchanged, it is undoubtedly more efficient and economical to place products A and B of the same component structure on a single mold for injection molding than batch processing. Therefore, mold cavities for products A and B are respectively set on the mold, forming a horizontal left-right distribution. This allows the processing of two products to be completed in a single injection molding process.

[0068] However, in actual production, products A and B often have a modular structure. This means that although they are similar in size, many structural details differ, and they may even require different ejection directions after injection molding. Research has found that simply setting up two sets of ejection components with different directions will result in one set ejecting faster than the other during injection molding due to differences in the load, direction, and distance exerted on the hydraulic cylinder by different products. This leads to an imbalance in the overall mold movement, affecting the robot's part removal and increasing the molding cycle. This, in turn, impacts subsequent processing on the production line.

[0069] Therefore, this solution proposes to adjust the driving force supply of ejection component A and ejection component B according to different operational requirements, namely the robot's gripping position and gripping timing requirements, so as to achieve a processing operation in which both components complete ejection at the same time.

[0070] In the above implementation scheme, the ejection distance setting in step S4 considers different state settings. State one is where the ejection distances of ejection components A and B are equal, and their ejection speeds are equal; that is, the ejection distances of cylinders A and B are consistent. Under the ejection distance requirement of state one, the actual flow rates obtained by the hydraulic cylinders in ejection components A and B are Q... a and Q b By adjusting the output flow rate at the locations of flow control valves A and B, the desired Q is achieved. a =Q b ;

[0071] Refer to the formula for adjustment:

[0072] ΔF=F a -F b

[0073] Where ΔF is the pressure difference generated by flow control valve A and flow control valve B, F a To achieve the ejection pressure of the hydraulic cylinder in ejector assembly A, F b The ejection pressure of the hydraulic cylinder in ejector component B;

[0074] F a =F a1 +F a2 +F a3

[0075] F b =F b1 +F b2 +F b3

[0076] Among them, F a1 For the clamping force of product A; F a2 F is the frictional force generated by the moving parts of the mold for product A. d3 The force of gravity on the moving parts of the mold for product A on the injection molding machine;

[0077] F b1 For the clamping force of product B, F b2 F is the frictional force generated by the moving parts of the mold for product B. b3 Let g be the weight of the moving parts of the mold for product B on the injection molding machine.

[0078] In this case, when the robot cooperates to grasp the product later, it can grasp the product at the same time, and the grasping position of the product can be set separately.

[0079] Based on the above implementation scheme, the setting of the ejection distance in step S4 also includes state two. State two uses the ejection distance setting condition of ejection component A and ejection component B as the body of product A and product B being ejected to the same horizontal height. In this state, when the robot cooperates to grasp the product, the product can be grasped at the same time, and the grasping horizontal position of the product is basically at the same horizontal height.

[0080] When the conditions of state two are met, the ejection distance of ejection component A is a, and the ejection distance of ejection component B is b.

[0081] Under the ejection distance requirement of state two, the formula is satisfied.

[0082] a=cosα·b

[0083] α is the angle between the movement directions of ejector component A and ejector component B; since a is the vertical movement distance, a and b can be the vertical side and hypotenuse of a right triangle, respectively, and the angle between them is α.

[0084] According to the formula relating flow rate and velocity, the velocity V = Q / S, where S corresponds to the cross-sectional area of ​​the hydraulic cylinder. The hydraulic cylinder movement times of ejector assembly A and ejector assembly B respectively satisfy the formulas...

[0085] T a =a / V a

[0086] T b =b / V b

[0087] Therefore, if component A and component B need to complete their movements in the same amount of time, the following mathematical relationship must be satisfied:

[0088]

[0089] The actual hydraulic oil flow rates obtained by the hydraulic cylinders of ejector assembly A and ejector assembly B satisfy the following conditions:

[0090] cosα·Q b =Q a

[0091] Where α is the angle between the ejection directions of ejection component A and ejection component B, Q a To determine the actual flow rate obtained by the hydraulic cylinder of component A, Q b This refers to the actual flow rate obtained by the hydraulic cylinder of ejector component B. See Appendix. Figure 1 and attached Figure 2The example provided in this solution is an oblique ejection structure with the lower end close to the vertical during oblique ejection, where α is the downward angle between the ejection directions of ejection components A and B. If, in actual implementation, the oblique ejection direction is opposite to that in this example, it does not affect the use of this method; only the position of the angle α relative to the vertical ejection direction differs. In actual production, either State 1 or State 2 can be selected based on factors such as the specific shape of the product, the gripping position, and the placement of the gripping robot. State 1 and State 2 can basically meet the needs of most injection molding production environments.

[0092] Based on the above implementation plan, see Figures 1 to 3 This solution also provides an injection molding ejection structure for implementing the aforementioned ejection method. Using the same ejection method, this ejection structure is connected to the rear mold assembly 100. Specifically, it includes an ejection assembly A1 corresponding to product A and an ejection assembly B2 corresponding to product B. Ejection assembly A1 includes a hydraulic cylinder A11 and a matching component. The movement direction of hydraulic cylinder A11 is vertical, and it can be linked with its corresponding matching component to eject product A vertically. Ejection assembly B2 includes a hydraulic cylinder B21. The movement direction of hydraulic cylinder B21 is inclined, and it can be linked with its corresponding matching component to eject product B obliquely. The cylinder bodies of hydraulic cylinders A11 and B21 are fixedly connected to the rear mold assembly 100. Both hydraulic cylinders A and B are configured with the cylinder body on the upper side and the movable end on the lower side. During operation, the movable end of the cylinder body retracts, ejecting the product. When the movable end of the cylinder body extends, the ejection structure resets.

[0093] The rear mold assembly 100 includes, from top to bottom, a rear template 101, a square iron assembly 102, a pad assembly 103, and a base plate 104. The square iron assembly 102 comprises three square irons distributed below the rear template 101, with the two outer square irons positioned below products A and B respectively, and the middle square iron positioned between them. The pad assembly 103 comprises two pads, respectively positioned corresponding to the positions of products A and B. The base plate 104 is a single, integral plate. This structure allows for the implementation of the aforementioned ejection method.

[0094] Based on the above implementation scheme, each supporting component includes an ejector plate assembly and an ejector rod assembly. That is, ejector component A and ejector component B each have their corresponding supporting component A and supporting component B. However, since supporting component A and supporting component B have similar structures, only differing in ejection direction, the following description will focus on a single supporting component.

[0095] The ejector plate assembly is located at the movable end of its corresponding hydraulic cylinder, including an ejector panel 31 and an ejector base plate 32. The ejector panel 31 is located on the upper side of the ejector base plate 32. The ejector panel 31 and the ejector base plate 32 are fixedly connected by a cylinder connecting block 33. The cylinder connecting block 33 is fixedly connected to the movable end of the hydraulic cylinder. An ejector limiting member 34 is provided on the ejector panel 31.

[0096] The ejector assembly includes a return pin assembly 41, a middle support assembly 42, a guide rod assembly 43, and an ejector pin assembly 44, all mounted on the ejector plate assembly. The lower end of the return pin in the return pin assembly 41 connects to the ejector plate assembly, while the upper end connects to a straight ejector 45 or an angled ejector 46. The lower end of the return pin in the return pin assembly 41 passes through the ejector top plate 31 and connects to the ejector bottom plate 32. The lower end of the rod in the middle support assembly 42 connects to the bottom plate 104 and extends through the pad assembly 103 and the square iron assembly 102 to the rear template 101. The lower end of the guide rod in the guide rod assembly 43 is provided with a guide rod connecting seat 48, which connects to the upper side of the ejector panel 31. Furthermore, a sliding sleeve assembly 47 is fixedly installed inside the lower mold assembly 100, and the rod body of the guide rod is slidably connected to the sliding sleeve in the sliding sleeve assembly 47.

[0097] The specific supporting component structure for hydraulic cylinders A11 and B21 is set according to the structure of this scheme. However, in actual implementation, the hole positions on the plate and the setting positions of the rods are set according to different products and molds, which will not be elaborated here.

[0098] Based on the above implementation plan, see Figure 4 To simplify the structure, cylinders A11 and B21 in this design are connected to the same hydraulic source. Their hydraulic circuits include an oil collector 5, pipeline group A51, and pipeline group B52. The oil collector 5 is equipped with an interface 54, which serves as the oil inlet and connects to the hydraulic oil source. The oil collector 5 acts as a distributor for pipeline groups A51 and B52, with oil outlets on both sides. One end of pipeline group A51 connects to one oil outlet of the oil collector 5, and the other end connects to the chamber of cylinder A11. One end of pipeline group B52 connects to the other oil outlet of the oil collector 5, and the other end connects to the chamber of cylinder B21. Flow regulating valves 53 are installed on the pathways of pipeline groups A51 and B52.

[0099] With the structure of this solution, the oil supply control for different cylinders can be achieved by using flow regulating valves as described in the aforementioned method. Furthermore, by separately adjusting the two flow regulating valves 53 on pipeline group A51 and pipeline group B52, the simultaneous ejection operation of different cylinders can be ensured while using the same oil supply source.

[0100] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-product injection molding method, characterized in that, Including the following steps: S1. For products that need to be injection molded, the shapes corresponding to different products are distributed and processed on the same mold; S2. Adjust the injection molding machine and the mold so that the mold is placed horizontally; S3. For the products on the mold, ejection components are set respectively. The ejection components include ejection component A and ejection component B. Ejection component A and ejection component B can eject the products in different directions. S4. Set the ejection distance as needed and adjust the driving force supply to the ejection component A and ejection component B to ensure that the ejection component A and ejection component B can complete the ejection operation simultaneously within the allowable time error range. S5. After the above steps are completed, proceed with the injection molding process of the product; In step S3, both ejection assembly A and ejection assembly B use hydraulic cylinders as the power source for the ejection operation. In step S4, both ejector assembly A and ejector assembly B are supplied with hydraulic oil by the main oil supply source. The main oil supply source is provided with oil circuit A and oil circuit B respectively for ejector assembly A and ejector assembly B. A flow regulating valve A is provided between oil circuit A and the pipeline of the main oil supply source, and a flow regulating valve B is provided between oil circuit B and the main oil supply source. The setting of the ejection distance in step S4 includes: In state one, the ejection distances of ejection component A and ejection component B are equal, and the ejection speeds of ejection component A and ejection component B are equal. Under the ejection distance requirement of State 1, the actual flow rates obtained by the hydraulic cylinders in ejection assembly A and ejection assembly B are respectively... and By adjusting the output flow rate at the locations of flow control valves A and B, the desired flow rate can be achieved. ; Refer to the formula for adjustment: ； in The pressure difference generated by flow control valve A and flow control valve B To generate the ejection pressure of the hydraulic cylinder in ejector assembly A, The ejection pressure of the hydraulic cylinder in ejector component B; ； in, The clamping force for product A; The frictional force generated by the moving parts of the mold for product A; The force of gravity on the moving parts of the mold for product A on the injection molding machine; For the gripping force of product B, The frictional force generated by the moving parts of the mold for product B; The force of gravity on the moving parts of the mold for product B on the injection molding machine; The setting of the ejection distance in step S4 also includes: State 2: The ejection distance of ejection component A and ejection component B is set as the condition that the bodies of product A and product B are ejected to the same horizontal height; when this condition is met, the ejection distance of ejection component A is a, and the ejection distance of ejection component B is b. Under the ejection distance requirement of state two, the formula is satisfied. ； The angle between the directions of motion of ejector component A and ejector component B; The actual hydraulic oil flow rates obtained by the hydraulic cylinders of ejector assembly A and ejector assembly B satisfy the following conditions: ； in The angle between the ejection directions of ejection component A and ejection component B. The actual flow rate obtained by the hydraulic cylinder of component A is given. The actual flow rate obtained by the hydraulic cylinder of ejector component B.

2. The multi-product injection molding method as described in claim 1, characterized in that, In step S1, products A and B are processed on the same mold, wherein product A is ejected vertically and product B is ejected at an angle. In step S3, ejector component A is set to correspond to product A, and ejector component A can eject in the vertical direction; ejector component B is set to correspond to product B, and ejector component B can eject in the diagonal direction.

3. An injection molding ejection structure, characterized in that, Applying the multi-product injection molding method as described in claim 1 or 2, this ejection structure is connected to the rear mold assembly (100); including: Ejection component A (1) includes hydraulic cylinder A (11) and supporting components. The hydraulic cylinder A (11) moves in the vertical direction. The hydraulic cylinder A (11) can link with its corresponding supporting components to eject product A in the vertical direction. Ejection component B (2) includes hydraulic cylinder B (21). The movement direction of hydraulic cylinder B (21) is inclined. Hydraulic cylinder B (21) can link its corresponding matching components to eject product B in an inclined direction. The cylinder bodies of the hydraulic cylinders A (11) and B (21) are respectively fixedly connected to the rear mold assembly (100).

4. The injection molding ejection structure as described in claim 3, characterized in that, The rear mold assembly (100) includes a rear template (101), a square iron assembly (102), a pad assembly (103), and a base plate (104) arranged sequentially from top to bottom. The square iron group (102) includes several square irons distributed on the lower side of the rear template (101), the pad group (103) includes two pads, which are set to correspond to the positions of product A and product B respectively; the base plate (104) is an integral plate.

5. The injection molding ejection structure as described in claim 4, characterized in that, Each of the aforementioned supporting components includes: The ejector plate assembly, located at the movable end of its corresponding hydraulic cylinder, includes an ejector panel (31) and an ejector base plate (32). The ejector panel (31) is located on the upper side of the ejector base plate (32). The ejector panel (31) and the ejector base plate (32) are fixedly connected by a cylinder connecting block (33), which is fixedly connected to the movable end of the hydraulic cylinder. An ejector limiting member (34) is provided on the ejector panel (31). The ejector rod assembly includes a return pin assembly (41), a middle support assembly (42), a guide rod assembly (43), and an ejector pin assembly (44) disposed on the ejector plate assembly; the lower end of the guide rod in the guide rod assembly (43) is connected to the ejector plate assembly, and the upper end is connected to a straight ejector (45) or an angled ejector (46).

6. The injection molding ejection structure as described in claim 5, characterized in that, The oil cylinders A (11) and B (21) are connected to the same oil source, and their oil circuits include: The oil collector (5) is provided with an interface (54) that is connected to the hydraulic oil source; Pipeline group A (51) is connected at one end to the oil outlet on one side of the oil collector (5) and at the other end to the chamber of oil cylinder A (11); Pipeline assembly B (52) is connected at one end to the oil outlet on the other side of the oil collector (5) and at the other end to the chamber of oil cylinder B (21); Flow regulating valves (53) are respectively installed on the passages of the pipeline group A (51) and the pipeline group B (52).

7. An injection molding device, characterized in that, It includes a front mold assembly and a rear mold assembly (100), wherein the rear mold assembly is provided with an injection ejection structure as described in any one of claims 3-6.

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