A mold with small-sized ejector pins and a demolding method

Abstract

This invention discloses a mold with small-sized ejector pins. The product has a connecting groove with a connecting hook block inside. The body includes an ejector punch with an ejector pin forming groove. The ejector punch includes a dynamic punch and a static punch. This invention also discloses a demolding method for the mold with small-sized ejector pins, the steps of which are as follows: After mold closing and injection molding, the front mold moves away from the rear mold. Conventional ejector pins and the dynamic punch eject synchronously, while the static punch remains stationary. The dynamic punch ejects from the connecting groove, and the connecting hook block and ejector pin forming groove are demolded laterally. The conventional ejector plate continues ejection, and the ejector pin plate remains stationary. The conventional ejector pins completely eject the product, and the product is removed. This invention provides a mold and demolding method with small-sized ejector pins that ensures high molding quality, high molding efficiency, and low manufacturing cost for concealed connecting structures.

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, when demolding after molding, the static punch remains stationary, the dynamic punch first ejects the product together with the conventional ejector pin, then stops, and then completes 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 stops. Then, the lateral demolding of the connecting hook block and the ejector forming groove is completed. Through this improvement, the purpose of lateral demolding is achieved in the middle of the ejection of the product by the conventional ejector, that is, it does not affect the ejection and demolding process, nor does it affect 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:

[0014] S1: Mold closing complete;

[0015] S2: The front mold moves away from the rear mold;

[0016] S3: The conventional ejector plate drives the conventional ejector pins, and the punch ejector plate drives the dynamic punch to eject synchronously.

[0017] S4: The static punch ensures that the die remains stationary, while the dynamic punch ejects from the connecting groove;

[0018] S5: Connect the hook block and the ejector pin forming groove for lateral demolding;

[0019] S6: The ejector plate is kept in the ejection operation, and the punch ejector plate is kept stationary.

[0020] S7: The ejector pin completely ejects the product;

[0021] S8: Remove the product.

[0022] 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.

[0023] As an improvement of the present invention, step S4 includes the following steps:

[0024] S4.1: The forming section begins to eject, and the forming section and the static punch begin to move relative to each other;

[0025] 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;

[0026] Step S5 includes the following steps:

[0027] S5.1: Use the arc-shaped hook surface of the connecting hook block to guide the dynamic punch to move towards the static punch;

[0028] 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.

[0029] As an improvement to the present invention, the method further includes the following steps:

[0030] S9: Perform mold closing reset;

[0031] S9.1: The conventional ejector plate moves towards the direction of the punch ejector plate;

[0032] S9.2: The conventional ejector plate abuts against the punch ejector plate, and the mold locking buckle is connected;

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0038] Figure 2 This is a schematic diagram of the product structure of the present invention.

[0039] Figure 3 This is the present invention. Figure 2 Schematic diagram of the structure of section A.

[0040] Figure 4 This is a schematic diagram of the cross-sectional structure of the ejector punch of the present invention (without the front mold).

[0041] Figure 5 This is the present invention. Figure 4 Schematic diagram of the connection structure of section B in the middle.

[0042] Figure 6 This is the present invention. Figure 5 Enlarged schematic diagram of the connection structure between the product and the ejector punch.

[0043] Figure 7 This is a schematic diagram of the connection structure between the dynamic punch and the sliding groove of the present invention.

[0044] 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.

[0045] 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

[0046] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0047] 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. The dynamic punch 4.2 first ejects the product 3 together with the conventional ejector pin, and then stops, and then completes the lateral demolding of the ejector forming groove 4.1 and the connecting hook block 3.2.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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, then stops, and then 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. Located 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 has 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.

[0052] The locking buckle 9 is a conventional technology, and its technical features can be found in patent CN209580212U.

[0053] The lower end of the conventional ejector plate 7 is connected to an external hydraulic cylinder via a hydraulic cylinder connector 7.1.

[0054] A demolding method for a mold with small-sized ejector pins, comprising the following steps:

[0055] S1: Complete mold closing and injection molding;

[0056] S2: The front mold 1 moves away from the rear mold 2;

[0057] 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;

[0058] S4: Static punch 4.3 ensures the machine remains stationary, dynamic punch 4.2 ejects from connecting groove 3.1;

[0059] 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;

[0060] 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;

[0061] S5: Connect the hook block 3.2 and the ejector pin forming groove 4.1 for lateral demolding;

[0062] S5.1: The arc-shaped hook surface 3.2.1 of the connecting hook block 3.2 guides the dynamic punch 4.2 to move towards the static punch 4.3;

[0063] S5.2: The dynamic punch 4.2 maintains horizontal movement, and the clearance 5 is reduced;

[0064] S6: The conventional ejector plate 7 is used to maintain the ejection operation, while the punch ejector plate 8 is kept stationary.

[0065] S7: The standard ejector pin fully ejects product 3;

[0066] S8: Remove product 3.

[0067] S9: Perform mold closing reset;

[0068] S9.1: The conventional ejector plate 7 moves towards the punch ejector plate 8;

[0069] S9.2: The conventional ejector plate 7 abuts against the punch ejector plate 8, and the mold locking buckle 9 connects them;

[0070] 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;

[0071] 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.

[0072] 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.

[0073] S9.6: The front mold 1 and the rear mold 2 are closed to prepare for the next round of injection molding.

[0074] 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.

[0075] 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-sized ejector pin, comprising a body, characterized in that: The body 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) is provided with a molding tool. The ejector forming groove (4.1) of the connecting hook block (3.2) includes a dynamic punch (4.2) and a static punch (4.3). The ejector forming groove (4.1) is located 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, and then stops, and then completes the lateral demolding of the ejector forming groove (4.1) and the connecting hook block (3.2). The static punch (4.3) is fixedly connected to the rear mold (2). The dynamic punch (4.2) includes a forming section (4.2.1) and a clearance section (4.2.2) at the end near the static punch (4.3). The forming section (4.2.1) is located at the end of the clearance section (4.2.2) near the front mold (1). When the mold is closed, 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 the demolding process, 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). The body includes a conventional ejector plate (7) and a punch ejector plate (8). The conventional ejector is 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) is ejected synchronously with the conventional ejector plate (7) at the beginning, and then stops. Then the lateral demolding of the connecting hook block (3.2) and the ejector forming groove (4.1) is completed.

2. The mold with a small-sized ejector pin according to claim 1, characterized in that: The end of the dynamic punch (4.2) away from the static punch (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 punch (4.2) toward the static punch (4.3), and the size of the end of the dynamic punch (4.2) connected to the sliding groove (6) is larger than the size of the end of the dynamic punch (4.2) used to form the connecting groove (3.1).

3. The mold with a small-sized ejector pin according to claim 2, characterized in that: 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 clearance section (4.2.2) is provided with a reset section (4.2.3) at one end close to the forming section (4.2.1). The reset section (4.2.3) is used to reset the dynamic punch (4.2) when the mold is closed.

4. The mold with a small-sized ejector pin according to claim 1, characterized in that: A locking buckle (9) connects the conventional ejector plate (7) and the punch ejector plate (8). The conventional ejector plate (7) is located at the upper end of the punch ejector plate (8). During the driving process, the conventional ejector plate (7) uses the locking buckle (9) to drive the punch ejector plate (8) to move synchronously.

5. A mold with a small-sized ejector pin according to claim 4, characterized in that: The ejector plate (8) of the punch 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, the end of the separation post (10) near the rear mold (2) is provided with a separation gap (11) between it and the rear mold (2). During the mold separation 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 ejector plate (8) of the punch stops ejecting.

6. A demolding method for a mold with small-sized ejector pins, characterized in that, The steps for using a mold with a small-sized ejector pin as described in claim 5 are as follows: 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 pin, and the punch ejector plate (8) drives the dynamic punch (4.2) to eject synchronously; S4: The static punch (4.3) ensures that the machine is stationary, while the dynamic punch (4.2) ejects from the 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 transverse demolding; S5.1: Use the arc-shaped hook surface (3.2.1) of the connecting hook block (3.2) to guide the 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) maintains the ejection operation, and the punch ejector plate (8) ensures the stationary state; S7: The product is fully ejected by the standard ejector pin (3); S8: Take out the product (3).

7. The demolding method for a mold with small-sized ejector pins according to claim 6, characterized in that, It also includes the following steps: S9: Perform mold closing reset; S9.1: The conventional ejector plate (7) moves toward 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 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 slope 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.

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