Mold with small-size unhooking ejector pin and demolding method

Abstract

A product is provided with a connecting groove, a connecting hook block is arranged in the connecting groove, a body comprises an ejector pin male die, an ejector pin forming groove is formed in the ejector pin male die, and the ejector pin male die comprises a dynamic male die body and a static male die body; the invention further discloses a demolding method of the mold with the small-size unhooking ejector pin, and the demolding method comprises the following steps that mold closing injection molding is completed, the front mold moves in the direction away from the rear mold, the conventional ejector pin and the dynamic male mold are synchronously ejected out, the static male mold is kept static, the dynamic male mold is ejected out of the connecting groove, and transverse demolding is conducted on the connecting hook block and the ejector pin forming groove. The conventional ejector pin plate keeps ejection operation, the male die ejector pin plate is kept in a static state, and the conventional ejector pin completely ejects the product and takes out the product. According to the mold with the small-size unhooking ejector pin and the demolding method, it is guaranteed that the forming quality of a hidden connecting structure is high, the forming efficiency is high, and the manufacturing cost is low.

Description

Technical Field

[0001] This invention relates to the field of molds, specifically to a mold with small-sized ejector pins and a demolding method. Background Technology

[0002] In the injection molding process, to achieve a seamless appearance without any installation marks, the connecting structure of the product is often built-in to achieve a hidden design. However, this can easily cause demolding interference between the single-sided integrated mold and the product, which is not conducive to high-efficiency and high-quality molding.

[0003] Therefore, the traditional molding die solution uses a split-structure design for the single-sided molding die. For example, the manual insert is manually placed on the rear mold core, the mold is closed directly for injection molding, and after injection molding, the product is ejected along with the manual insert. Then, the worker removes the manual insert and places it on the rear mold core for the next injection molding. This design has obvious drawbacks, mainly: First, the manual removal and placement of the manual insert greatly prolongs the product production cycle, reduces product production efficiency, and increases product production costs. Second, the manual insert is easily bumped and damaged during long-term repeated separation and installation, requiring the manufacture of spare parts and timely replacement, increasing manufacturing costs. Third, the positioning connection between the manual insert and the rear mold core is used to form the connecting structure, and the positioning accuracy of the manual insert determines the molding quality of the connecting structure. During repeated installation, positioning deviations are easily caused, leading to an increase in the product defect rate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a mold and demolding method with small-sized ejector pins that ensures high molding quality, high molding efficiency and low manufacturing cost of the hidden connection structure.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows: a mold with a small-sized ejector pin, comprising a body, the body comprising a front mold and a rear mold, the front mold and the rear mold forming a mold cavity for molding a product when the mold is closed, the product having a connecting groove on the side near the rear mold, the connecting groove having a connecting hook block, the body comprising an ejector pin punch for molding the connecting groove in the area where the connecting hook block is located, the ejector pin punch having an ejector pin forming groove for molding the connecting hook block, the ejector pin punch comprising a dynamic punch and a static punch, the ejector pin forming groove being disposed on the dynamic punch, the static punch remaining stationary during demolding after molding, the dynamic punch first ejecting the product together with a conventional ejector pin, and then stopping to complete the lateral demolding of the ejector pin forming groove and the connecting hook block.

[0006] Compared with existing technologies, the advantages of this invention are as follows: Traditional split structures use a connecting hook block as the dividing line, with the side of the connecting hook block near the front mold (manual insert) and the side near the rear mold (main body of the rear mold core) separating during demolding, resulting in a split structure design for the rear mold core. In this design, the main body of the rear mold core is fixedly connected inside the rear mold, while the manual insert ejects with the product. However, in this invention, the ejector pin punch is not designed as a split structure in the demolding direction, but rather as a horizontal split structure. Furthermore, in this split design, the dynamic punch always remains connected to the rear mold, preventing the formation of a transmission... In the case of complete separation of the system, after the dynamic punch and the conventional ejector pin eject the product together, a height deviation is formed between the dynamic punch and the static punch. This allows the dynamic punch to move towards the static punch to complete the demolding between the ejector pin forming groove and the connecting hook block. During this process, the dynamic punch does not completely detach from the rear mold and remains connected. Therefore, there is no need for reciprocating separation and installation, ensuring positional consistency. Only resetting is required, thereby improving product production efficiency and quality, reducing the defect rate, and reducing the installation process. This also avoids the probability of the dynamic punch being bumped or damaged, thus reducing production costs.

[0007] As an improvement of the present invention, the static punch is fixedly connected to the rear die. The end of the dynamic punch near the static punch includes a forming section and a clearance section. The forming section is located at the end of the clearance section near the front die. During die closing, the forming section abuts against the static punch to form the connecting groove. A clearance gap is provided between the clearance section and the static punch. During demolding, the dynamic punch uses the clearance gap to move towards the static punch, completing the lateral demolding of the connecting hook block and the ejector pin forming groove. Through this improvement, the design of the forming section ensures the fullness of the ejector pin punch when forming the connecting groove and the connecting hook block, ensuring the forming quality of the connecting groove and the connecting hook block. The design of the clearance section provides space for the dynamic punch to perform lateral demolding. At the same time, the design of the clearance section can also realize the separation between the static punch and the dynamic punch, avoiding friction and wear between the dynamic punch and the static punch during movement.

[0008] As an improvement of the present invention, the end of the dynamic punch away from the static punch is movably connected in a sliding groove. The sliding direction of the sliding groove is parallel to the moving direction of the dynamic punch towards the static punch. The dimension of the end of the dynamic punch connected to the sliding groove is larger than the dimension of the end of the dynamic punch used to form the connecting groove. Through this improvement, the design of movably connecting in the sliding groove ensures the stability of lateral demolding. The reason why the dimension of the end of the dynamic punch connected to the sliding groove is larger than the dimension of the end of the dynamic punch used to form the connecting groove is that the dimension of the end of the dynamic punch used to form the connecting groove is small and has low strength. By taking advantage of the characteristic that there is no connection interference at the end of the dynamic punch connected to the sliding groove, the dynamic punch is thickened to enhance its structural strength and avoid deformation during lateral demolding.

[0009] As an improvement of the present invention, the connecting hook block is provided with an arc-shaped hook surface, which is located in the direction close to the front mold. The width of the arc-shaped hook surface is smaller than the width of the clearance gap. A reset section is provided at one end of the clearance section near the forming section. The reset section is used to reset the dynamic punch during mold closing. Through this improvement, the dynamic punch and the conventional ejector pin first eject the product together, realizing the relative movement between the dynamic punch and the static punch, so that the forming end of the static punch is aligned with the clearance section. Then, the conventional ejector pin continues to eject while the dynamic punch stops ejecting, causing the connecting hook block and the ejector pin forming groove to move relative to each other in the longitudinal direction. At this time, the arc-shaped hook surface guides the movement between the connecting hook block and the ejector pin forming groove. The design allows for lateral demolding; the clearance width is greater than the connection width of the arc-shaped hook surface, ensuring sufficient travel for lateral demolding. This avoids strong demolding under the guidance of the arc-shaped hook surface, preventing product damage or deformation during demolding. Furthermore, because the movement distance of the mold-to-mold demolding is guided by the product's own structure, it ensures the demolding contact effect between the connecting hook block and the ejector pin forming groove. Without affecting the molding quality of the product and the quality of the mold, demolding is completed within a minimal range, giving the dynamic punch greater design space and effectively ensuring the structural strength of the dynamic punch. The reset section is designed to reset the dynamic punch that has completed lateral demolding during mold closing.

[0010] As an improvement of the present invention, the body includes a conventional ejector plate and a punch ejector plate. The conventional ejector is connected to the conventional ejector plate, and the dynamic punch is connected to the punch ejector plate. During demolding, the conventional ejector plate continues to eject until the product is completely ejected. The punch ejector plate ejects synchronously with the conventional ejector plate at the beginning, and then completes the lateral demolding of the connecting hook block and the ejector forming groove when stationary. Through this improvement, the purpose of lateral demolding is achieved in the middle of the process of ejecting the product by the conventional ejector, that is, without affecting the ejection and demolding process, and without affecting the demolding quality.

[0011] As an improvement of the present invention, a mold locking buckle is connected between the conventional ejector plate and the punch ejector plate. The conventional ejector plate is located at the upper end of the punch ejector plate. During the driving process, the conventional ejector plate uses the mold locking buckle to drive the punch ejector plate to move synchronously. Through this improvement, the conventional ejector plate drives the punch ejector plate to move outward.

[0012] As an improvement of the present invention, the ejector plate of the punch is provided with a separation post on the side near the rear mold. The separation post passes through the conventional ejector plate. In the mold closing state, there is a separation gap between the end of the separation post near the rear mold and the rear mold. During the mold parting process, after the separation post abuts against the rear mold, the conventional ejector plate continues to eject, the mold locking buckle separates, and the ejector plate of the punch stops ejecting. Through the above improvement, the ejector pin of the punch is separated from the conventional ejector plate after completing the transverse demolding.

[0013] A demolding method for a mold with small-sized ejector pins, comprising the following steps: S1: Mold closing complete; S2: The front mold moves away from the rear mold; S3: The conventional ejector plate drives the conventional ejector pins, and the punch ejector plate drives the dynamic punch to eject synchronously. S4: The static punch ensures that the die remains stationary, while the dynamic punch ejects from the connecting groove; S5: Connect the hook block and the ejector pin forming groove for lateral demolding; S6: The ejector plate is kept in the ejection operation, and the punch ejector plate is kept stationary. S7: The ejector pin fully ejects the product; S8: Remove the product.

[0014] Compared with existing technologies, the advantages of this invention are as follows: In traditional split-type structures, during the demolding process, the manual insert is manually placed on the rear mold core, the mold is closed, and injection molding is performed. After injection molding, the product is ejected along with the manual insert, which is then removed by a worker and placed on the rear mold core for the next injection molding cycle. In this invention, during the ejection process, after the dynamic punch and conventional ejector pins jointly eject the product, a height difference is created between the dynamic and static punches. This allows the dynamic punch to move towards the static punch, completing the demolding between the ejector pin forming groove and the connecting hook block. During the process, the dynamic punch does not completely detach from the rear die and remains connected. Therefore, there is no need for reciprocating separation and installation, ensuring positional consistency. Only resetting is required, thereby improving production efficiency and quality, reducing defect rate, and minimizing installation process. This also avoids the probability of the dynamic punch being bumped or damaged, reducing production costs. During the recovery process, only normal resetting is required, without any other operations. The deflection caused by the lever movement of the dynamic punch will also be reset by the static punch guiding and correcting the forming section during the mold closing process of the dynamic and static punches.

[0015] As an improvement of the present invention, step S4 includes the following steps: S4.1: The forming section begins to eject, and the forming section and the static punch begin to move relative to each other; S4.2: The forming section and the static punch are completely separated, and the height area where the static punch is located is within the height area where the clearance section is located; Step S5 includes the following steps: S5.1: The arc-shaped hook surface of the connecting hook block guides the dynamic punch to move towards the static punch; S5.2: The dynamic punch maintains horizontal movement, and the clearance is reduced. Through the aforementioned improvements, in steps S4.1 and S4.2, the design of the clearance section can also achieve separation between the static punch and the dynamic punch, avoiding friction and wear between the dynamic punch and the static punch during movement. Through the design of step S5.1, the lateral demolding movement is realized. Through the design of step S5.2, the space for the dynamic punch to perform lateral demolding is provided by utilizing the design of the clearance section.

[0016] As an improvement to the present invention, the method further includes the following steps: S9: Perform mold closing reset; S9.1: The conventional ejector plate moves towards the direction of the punch ejector plate; S9.2: The conventional ejector plate abuts against the punch ejector plate, and the mold locking buckle is connected; S9.3: The conventional ejector plate and the punch ejector plate move synchronously in the direction away from the front mold, and the static punch abuts against the reset slope. S9.4: The conventional ejector plate and the punch ejector plate continue to move away from the front mold. Under the guidance of the resetting inclined surface and the static punch, the dynamic punch begins to reset. The dynamic punch moves laterally while moving away from the front mold. S9.5: The conventional ejector plate and the punch ejector plate are reset, and the dynamic punch is also reset. The forming section abuts against the static punch. S9.6: The front and rear molds close to prepare for the next injection molding process. Through the aforementioned improvement, the mold closing and resetting is achieved. During the resetting process, the dynamic punch naturally resets following the conventional ejector plate, requiring no other operations. The resetting process is simple, without disassembly, installation, or positioning, ensuring the accuracy of the resetting, thereby improving product production efficiency and quality, reducing the defect rate, and reducing the probability of collisions and damage to the dynamic punch by reducing the installation process, thus reducing production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the product structure of the present invention.

[0019] Figure 3 This is the present invention. Figure 2 Schematic diagram of the structure of section A.

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the ejector punch of the present invention (without the front mold).

[0021] Figure 5 This is the present invention. Figure 4 Schematic diagram of the connection structure of section B in the middle.

[0022] Figure 6 This is the present invention. Figure 5 Enlarged schematic diagram of the connection structure between the product and the ejector punch.

[0023] Figure 7 This is a schematic diagram of the connection structure between the dynamic punch and the sliding groove of the present invention.

[0024] Figure 8 This is a schematic diagram of the connection structure between the conventional ejector plate and the punch ejector plate of the present invention.

[0025] The figure shows: 1. Front mold, 2. Rear mold, 2.1. Rear mold core, 3. Product, 3.1. Connecting groove, 3.2. Connecting hook block, 3.2.1. Arc hook surface, 4. Ejector punch, 4.1. Ejector forming groove, 4.2. Dynamic punch, 4.2.1. Forming section, 4.2.2. Clearance section, 4.2.3. Reset section, 4.3. Static punch, 5. Clearance clearance, 6. Sliding groove, 7. Conventional ejector plate, 7.1. Hydraulic cylinder connector, 8. Punch ejector plate, 9. Mold locking buckle, 10. Separation column, 11. Separation clearance. Detailed Implementation

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

[0027] like Figure 1-6 As shown, a mold with small-sized ejector pins includes a body, which includes a front mold 1 and a rear mold 2. When the front mold 1 and the rear mold 2 are closed, they form a mold cavity for molding a product 3. The product 3 has a connecting groove 3.1 on the side near the rear mold 2. A connecting hook block 3.2 is provided in the connecting groove 3.1. The body includes an ejector punch 4 for molding the connecting groove 3.1 in the area where the connecting hook block 3.2 is located. The ejector punch 4 has an ejector forming groove 4.1 for molding the connecting hook block 3.2. The ejector punch 4 includes a dynamic punch 4.2 and a static punch 4.3. The ejector forming groove 4.1 is provided on the dynamic punch 4.2. When demolding after molding, the static punch 4.3 remains stationary, and the dynamic punch 4.2 first ejects the product 3 together with the conventional ejector pin, and then stops to complete the lateral demolding of the ejector forming groove 4.1 and the connecting hook block 3.2.

[0028] The static punch 4.3 is fixedly connected to the rear mold core 2.1 of the rear mold 2. The dynamic punch 4.2 near the static punch 4.3 includes a forming section 4.2.1 and a clearance section 4.2.2. The forming section 4.2.1 is located at the end of the clearance section 4.2.2 near the front mold 1. During mold closing, the forming section 4.2.1 and the static punch 4.3 abut against each other to form the connecting groove 3.1. A clearance gap 5 is provided between the clearance section 4.2.2 and the static punch 4.3. During demolding, the dynamic punch 4.2 moves towards the static punch 4.3 using the clearance gap 5 to complete the lateral demolding of the connecting hook block 3.2 and the ejector pin forming groove 4.1.

[0029] like Figure 4-7As shown, the end of the dynamic punch 4.2 away from the static punch 4.3 is movably connected to a sliding groove 6. The sliding direction of the sliding groove 6 is parallel to the moving direction of the dynamic punch 4.2 towards the static punch 4.3. The dimension of the end of the dynamic punch 4.2 connected to the sliding groove 6 is larger than the dimension of the end of the dynamic punch 4.2 used to form the connecting groove 3.1. The connecting hook block 3.2 is provided with an arc-shaped hook surface 3.2.1. The arc-shaped hook surface 3.2.1 is located in the direction close to the front mold 1. The width of the arc-shaped hook surface 3.2.1 is smaller than the width of the clearance gap 5. The end of the clearance section 4.2.2 close to the forming section 4.2.1 is provided with a reset section 4.2.3. The reset section 4.2.3 is used to reset the dynamic punch 4.2 during mold closing.

[0030] When the connecting groove 3.1 is small, the width of the clearance 5 should be minimized as much as possible. This is because the clearance 5 is formed by thinning the dynamic punch 4.2. An excessively large clearance 5 can easily reduce the strength of the dynamic punch 4.2. This is the same as the function of the end of the dynamic punch 4.2 that connects to the sliding groove 6 being larger than the end of the dynamic punch 4.2 used to form the connecting groove 3.1, both of which are used to improve the structural strength of the dynamic punch 4.2.

[0031] like Figure 1 , Figure 4 , Figure 8 As shown, the body includes a conventional ejector plate 7 and a punch ejector plate 8. The conventional ejector pins are connected to the conventional ejector plate 7, and the dynamic punch 4.2 is connected to the punch ejector plate 8. During demolding, the conventional ejector plate 7 continues to eject until the product 3 is completely ejected. The punch ejector plate 8 initially ejects synchronously with the conventional ejector plate 7, and then, when stationary, completes the lateral demolding of the connecting hook block 3.2 and the ejector forming groove 4.1. A mold locking buckle 9 connects the conventional ejector plate 7 and the punch ejector plate 8. The conventional ejector plate 7 is equipped with... At the upper end of the punch ejector plate 8, the conventional ejector plate 7 is driven to move synchronously by the mold locking buckle 9 during the driving process. The punch ejector plate 8 is provided with a separation post 10 on the side near the rear mold 2. The separation post 10 passes through the conventional ejector plate 7. In the mold closing state, there is a separation gap 11 between the end of the separation post 10 near the rear mold 2 and the rear mold 2. During the mold parting process, after the separation post 10 abuts against the rear mold 2, the conventional ejector plate 7 continues to eject, the mold locking buckle 9 separates, and the punch ejector plate 8 stops ejecting.

[0032] The locking buckle 9 is a conventional technology, and its technical features can be found in patent CN209580212U.

[0033] The lower end of the conventional ejector plate 7 is connected to an external hydraulic cylinder via a hydraulic cylinder connector 7.1.

[0034] A demolding method for a mold with small-sized ejector pins, comprising the following steps: S1: Complete mold closing and injection molding; S2: The front mold 1 moves away from the rear mold 2; S3: The conventional ejector plate 7 drives the conventional ejector pins, and the punch ejector plate 8 drives the dynamic punch 4.2 to eject synchronously; S4: Static punch 4.3 ensures the machine remains stationary, dynamic punch 4.2 ejects from connecting groove 3.1; S4.1: The forming section 4.2.1 begins to eject, and the forming section 4.2.1 and the static punch 4.3 begin to move relative to each other; S4.2: The forming section 4.2.1 and the static punch 4.3 are separated, and the height area of ​​the static punch 4.3 is within the height area of ​​the clearance section 4.2.2; S5: Connect the hook block 3.2 and the ejector pin forming groove 4.1 for lateral demolding; S5.1: The arc-shaped hook surface 3.2.1 of the connecting hook block 3.2 guides the moving dynamic punch 4.2 to move towards the static punch 4.3; S5.2: The dynamic punch 4.2 maintains horizontal movement, and the clearance 5 is reduced; S6: The conventional ejector plate 7 is used to maintain the ejection operation, while the punch ejector plate 8 is kept stationary. S7: The standard ejector pin fully ejects product 3; S8: Remove product 3.

[0035] S9: Perform mold closing reset; S9.1: The conventional ejector plate 7 moves towards the punch ejector plate 8; S9.2: The conventional ejector plate 7 abuts against the punch ejector plate 8, and the mold locking buckle 9 connects them; S9.3: The conventional ejector plate 7 and the punch ejector plate 8 move synchronously in a direction away from the front mold 1, and the static punch 4.3 abuts against the reset slope; S9.4: The conventional ejector plate 7 and the punch ejector plate 8 continue to move away from the front mold 1. Under the guidance of the resetting inclined surface and the static punch 4.3, the dynamic punch 4.2 begins to reset. The dynamic punch 4.2 moves laterally while moving away from the front mold 1. S9.5: The conventional ejector plate 7 and the punch ejector plate 8 are reset, and the dynamic punch 4.2 is also reset. The forming section 4.2.1 abuts against the static punch 4.3. S9.6: The front mold 1 and the rear mold 2 are closed to prepare for the next round of injection molding.

[0036] By using a mold with a small-sized ejector pin, when forming the connecting hook block 3.2 structure within the small-sized connecting groove 3.1, the manual insert design is no longer required. Instead, the forming structure is designed as a horizontally split structure. In this split design, the dynamic punch 4.2 remains connected to the rear mold core 2.1, avoiding the traditional complete separation. After the dynamic punch 4.2 and the conventional ejector pin eject the product 3 together, a height difference is created between the dynamic punch 4.2 and the static punch 4.3. Furthermore, the clearance section 4.2.2 of the static punch 4.3 and the dynamic punch 4.2 are flush, facilitating the movement of the dynamic punch 4.2 towards the static punch. The dynamic punch 4.3 moves in the direction of the ejector pin forming groove 4.1 to complete the demolding between the ejector pin forming groove 4.1 and the connecting hook block 3.2. During this process, the dynamic punch 4.2 does not completely detach from the rear mold core 2.1 and always remains connected. Therefore, there is no need for reciprocating separation and installation, which ensures the consistency of position. Only resetting is required. Although the steps of its resetting process are different from those of the conventional mold resetting process, the operation is the same. No additional steps such as disassembly and installation are required, thereby improving the production efficiency and quality of product 3 and reducing the defect rate. By reducing the installation process, the probability of the dynamic punch 4.2 being bumped or damaged is avoided, thus reducing production costs.

[0037] The above description only illustrates the preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All modifications made within the scope of the independent claims of this invention are also within the scope of protection of this invention.

Claims

1. A mold with a small size ejector pin, comprising a body, characterized in that: The body includes a front mold (1) and a rear mold (2), the front mold (1) and the rear mold (2) form a mold cavity for forming a product (3) in the closed mold condition, the product (3) is provided with a connecting groove (3.1) near one side of the rear mold (2), the connecting hook block (3.2) is arranged in the connecting groove (3.1), the body includes a ejector pin projection (4) for forming the connecting groove (3.1) in the area where the connecting hook block (3.2) is arranged, the ejector pin projection (4) is provided with an ejector pin forming groove (4.1) for forming the connecting hook block (3.2), the ejector pin projection (4) includes a dynamic projection (4.2) and a static projection (4.3), the ejector pin forming groove (4.1) is arranged on the dynamic projection (4.2), when demolding after forming, the static projection (4.3) remains stationary, the dynamic projection (4.2) first ejects the product (3) together with the conventional ejector pin, and then stops to complete the transverse demolding of the ejector pin forming groove (4.1) and the connecting hook block (3.2).

2. The mold with small size ejector pin according to claim 1, characterized in that: The static projection (4.3) is fixedly connected to the rear mold (2), one end of the dynamic projection (4.2) near the static projection (4.3) includes a forming section (4.2.1) and an avoiding section (4.2.2), the forming section (4.2.1) is arranged at one end of the avoiding section (4.2.2) near the front mold (1), when the mold is closed, the forming section (4.2.1) abuts against the static projection (4.3) for forming the connecting groove (3.1), an avoiding gap (5) is arranged between the avoiding section (4.2.2) and the static projection (4.3), during the demolding process, the dynamic projection (4.2) moves towards the static projection (4.3) by using the avoiding gap (5), to complete the transverse demolding of the connecting hook block (3.2) and the ejector pin forming groove (4.1).

3. The mold with small size ejector pin according to claim 2, characterized in that: One end of the dynamic projection (4.2) away from the static projection (4.3) is movably connected in a sliding groove (6), the sliding direction of the sliding groove (6) is parallel to the moving direction of the dynamic projection (4.2) towards the static projection (4.3), and the size of one end of the dynamic projection (4.2) connected with the sliding groove (6) is greater than the size of one end of the dynamic projection (4.2) for forming the connecting groove (3.1).

4. The mold with small size ejector pin according to claim 3, characterized in that: An arc-shaped hook surface (3.2.1) is arranged on the connecting hook block (3.2), the arc-shaped hook surface (3.2.1) is arranged in the direction close to the front mold (1), the width of the arc-shaped hook surface (3.2.1) is smaller than the width of the avoiding gap (5), one end of the avoiding section (4.2.2) close to the forming section (4.2.1) is provided with a reset section (4.2.3), the reset section (4.2.3) is used for resetting the dynamic projection (4.2) when the mold is closed.

5. The mold with small size ejector pin according to claim 1, characterized in that: The body includes a conventional ejector pin plate (7) and a punch ejector pin plate (8), the conventional ejector pin is connected on the conventional ejector pin plate (7), the dynamic punch (4.2) is connected on the punch ejector pin plate (8), when demolding, the conventional ejector pin plate (7) continuously keeps the ejection operation until the product (3) is completely ejected, the punch ejector pin plate (8) starts to synchronously eject with the conventional ejector pin plate (7) at first, and then completes the transverse demolding of the connecting hook block (3.2) and the ejector pin forming groove (4.1) in the static state.

6. The mold with small size ejector pin according to claim 5, characterized in that: The mold locking buckle (9) is connected between the conventional ejector pin plate (7) and the punch ejector pin plate (8), the conventional ejector pin plate (7) is arranged at the upper end of the punch ejector pin plate (8), and the conventional ejector pin plate (7) is driven to synchronously move by the mold locking buckle (9) during the driving process.

7. The mold with small size ejector pin according to claim 6, characterized in that: The punch ejector pin plate (8) is provided with a separation column (10) on the side close to the back mold (2), the separation column (10) penetrates through the conventional ejector pin plate (7), and a separation gap (11) is arranged between the end of the separation column (10) close to the back mold (2) and the back mold (2) in the mold closing state, after the separation column (10) abuts against the back mold (2) during mold opening, the conventional ejector pin plate (7) continuously ejects, the mold locking buckle (9) is separated, and the punch ejector pin plate (8) stops the ejection operation.

8. A method of demolding a mold with a small size ejector pin, characterized in that, The steps of the mold with small-size demolding ejector pin in any one of claims 1-7 are as follows: S1: complete mold closing and injection molding; S2: the front mold (1) moves away from the back mold (2); S3: the conventional ejector pin plate (7) drives the conventional ejector pin, and the punch ejector pin plate (8) drives the dynamic punch (4.2) to synchronously eject; S4: the static punch (4.3) ensures the static state, and the dynamic punch (4.2) ejects the connecting groove (3.1); S5: the connecting hook block (3.2) and the ejector pin forming groove (4.1) are transversely demolded; S6: the conventional ejector pin plate (7) keeps the ejection operation, and the punch ejector pin plate (8) ensures the static state; S7: the conventional ejector pin completely ejects the product (3); S8: the product (3) is taken out.

9. A demolding method for a mold with small-sized ejector pins according to claim 8, characterized in that, In step S4, the steps include: S4.1: the forming section (4.2.1) starts to eject, and the forming section (4.2.1) starts to move relative to the static punch (4.3); S4.2: the forming section (4.2.1) and the static punch (4.3) are separated, and the height region where the static punch (4.3) is located is within the height region where the avoiding section (4.2.2) is located; In step S5, the steps include: S5.1: the arc-shaped hook surface (3.2.1) of the connecting hook block (3.2) is used to guide the dynamic punch (4.2) to move towards the static punch (4.3); S5.2: the dynamic punch (4.2) keeps horizontal movement, and the avoiding gap (5) is reduced.

10. The method of claim 9, wherein the mold with the small size ejection pin is characterized by, Further steps include: S9: mold closing reset is performed; S9.1: the conventional ejector pin plate (7) moves towards the punch ejector pin plate (8); S9.2: the conventional ejector pin plate (7) abuts against the punch ejector pin plate (8), and the mold locking buckle (9) is connected. S9.3: The conventional ejector plate (7) and the punch ejector plate (8) move away from the front mold (1) synchronously, the static punch (4.3) abuts against the reset slope; S9.4: The conventional ejector plate (7) and the punch ejector plate (8) continue to move away from the front mold (1), under the guidance of the abutment between the reset slope and the static punch (4.3), the dynamic punch (4.2) starts to reset, and the dynamic punch (4.2) moves laterally while moving away from the front mold (1); S9.5: The conventional ejector plate (7) and the punch ejector plate (8) complete the reset, and at the same time, the dynamic punch (4.2) also completes the reset, and the forming section (4.2.1) abuts against the static punch (4.3); S9.6: The front mold (1) and the rear mold (2) are closed, preparing for the next round of injection molding.

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