A slanted bar push block structure of a mold
By designing a slanted pusher block structure and utilizing the cross arrangement of long strip-shaped pushers and fixed blocks, the problem of product damage during ejector demolding is solved, achieving stable demolding and improved molding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SAIHAO IND CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-09
AI Technical Summary
In existing injection molds, ejector pins can easily damage the product during demolding, affecting molding quality.
The inclined push block structure includes a long strip-shaped push block, a push rod, and a fixing block. The push block abuts against the product, and the elastic elements and guide rails are arranged in a straight cross shape to achieve a stable demolding process, increase the contact area, and limit the movement direction of the push block to avoid product deformation.
It improves the product's demolding stability and molding quality, avoids product deformation during demolding, and enhances the product's molding effect.
Smart Images
Figure CN224334918U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mold technology and relates to a slanted push block structure for a mold. Background Technology
[0002] In injection molding, when demolding products with large areas and small thicknesses, relying solely on core pulling and ejector pin demolding methods can easily cause damage to the product at the demolding point, resulting in product damage.
[0003] For example, Chinese patent application [Authorization Announcement No.: CN207256643U] discloses a slanted ejector pin ejection structure for a mold, including a moving mold and a slanted ejector slidably disposed within the moving mold. A punch for product forming is provided on one side of the slanted ejector. A through groove is provided between the slanted ejector and the punch. An ejector pin for ejecting the product and separating it from the punch is slidably disposed within the through groove. A guide surface is provided on the moving mold, which abuts against the end of the ejector pin away from the punch and guides the ejector pin to eject the product. A push block is provided on the side wall of the ejector pin. A sliding groove is provided on the slanted ejector for the push block to slide. An elastic element is provided on the slanted ejector for pushing the push block so that the ejector pin abuts against the guide surface. A limiting block for limiting the push block is provided on the side of the slanted ejector away from the punch.
[0004] In the above structure, when the slanted ejector moves, the ejector rod moves relative to the slanted ejector under the action of the guide surface. The product adhering to the punch is ejected through the end of the ejector rod, realizing the separation between the product and the punch. However, because the contact area between the end of the ejector rod and the product is small, the thrust of the ejector rod can easily damage the product during the demolding process, causing the product to deform at this point, thereby reducing the molding quality of the product. Utility Model Content
[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a slanted pusher block structure for molds. The technical problem to be solved by this utility model is: how to solve the problem of existing ejector pins affecting the molding quality of products during demolding.
[0006] The objective of this utility model can be achieved through the following technical solutions:
[0007] A slanted push block structure for a mold, the mold including a moving mold and a slanted top slidably disposed within the moving mold, the slanted top having an installation groove on one side and a guide groove on the other side, a guide hole connecting the installation groove and the guide groove in the middle of the slanted top, the moving mold having a guide rail surface disposed along the mold opening direction, the length direction of the guide rail surface intersecting the length direction of the slanted top, characterized in that the slanted push block structure includes a push block in the shape of a long strip plate disposed within the installation groove and capable of abutting against the product, a long push rod disposed within the slanted top, one end of the push rod passing through the guide hole and fixedly connected to the push block, the other end connected to a fixing block, the end face of the fixing block fitting against the guide rail surface, and an elastic element disposed within the guide groove for the end face of the fixing block to press against the guide rail surface when the slanted top is ejected.
[0008] By abutting the push block against the product, the side of the push block becomes the forming cavity surface during product molding. During mold opening, the inclined ejector moves tilted to open the mold. The push block, ejector rod, and fixed block move synchronously along the mold opening direction with the inclined ejector. The fixed block is in direct contact with the guide rail. The pushing force of the elastic element keeps the end face of the fixed block in contact with the guide rail. The length direction of the guide rail is along the mold opening direction, and its length direction intersects with the length direction of the inclined ejector. This means that while the inclined ejector moves along the mold opening direction, the fixed block does not move along the width direction of the inclined ejector, but only moves along the mold opening direction. The elastic element is compressed, and the fixed block and the inclined ejector move relative to each other in the width direction of the inclined ejector. Through the limiting of the guide rail, the fixed block does not move in the width direction of the inclined ejector. Thus, the fixed block is pushed out by the ejector rod, and the push block pushes the product out along the width direction of the inclined ejector, thereby achieving demolding. By using block positioning at both ends, the stability of demolding is improved.
[0009] To ensure the product can be stably ejected by the push block, a long, strip-shaped push block is used to increase the side area of the push block, thereby increasing the contact area between the push block and the product. This prevents deformation of the product during pushing due to localized force. Because the push block is relatively large, a push rod and a fixing block are used in combination. This improves the stability of the fixing block against the guide rail during sliding and ensures stable pushing, preventing displacement in other directions when the push block moves along the push rod axis. This ensures normal demolding and improves the molding quality of the product.
[0010] In the aforementioned inclined push block structure of the mold, the side wall of the push block can abut against the groove wall of the mounting groove and slide along the groove wall of the mounting groove.
[0011] The push block is a long, strip-shaped block with a large volume. Therefore, in order to ensure that the push block can move stably along the width direction of the inclined top, the side wall of the push block is attached to the groove wall of the mounting groove. This allows the push block to be limited by the groove wall when moving along the width direction of the inclined top, thereby improving the stability of the push block and ensuring the molding quality of the product.
[0012] In the above-mentioned inclined push block structure of the mold, the fixing block is a square block, and the side wall of the fixing block can abut against the side wall of the guide groove and slide relative to the groove wall of the guide groove.
[0013] The shape of the fixing block is designed to increase the contact area between the fixing block and the guide rail, thereby improving the stability of the fixing block against the rail. In order to ensure the stability of the fixing block against the rail, the fixing block is placed against the guide groove wall to achieve the limit, which improves the stability of the relative sliding between the inclined top and the fixing block when the inclined top moves.
[0014] The cooperation between the fixing block and the guide groove, as well as the cooperation between the push block and the mounting groove, enables limiting at both ends of the push rod, thereby improving the stability of the push rod's sliding.
[0015] In the aforementioned inclined push block structure of the mold, the length of the push block is greater than the length of the fixed block.
[0016] This structure allows the pusher block to stably push the molded product, improving the stability of product demolding. The fixing block simply needs to be in direct contact with the guide rail, and only needs to be in stable contact with the guide rail. Therefore, the length of both blocks can meet the demolding stability requirements while minimizing the installation space required by both blocks.
[0017] In the above-mentioned inclined rod push block structure of the mold, the elastic element is a spring, the spring is sleeved on the push rod, the bottom of the guide groove is recessed to form a positioning notch, the end face of the fixing block is recessed to form a clearance notch, and the two ends of the elastic element are respectively located in the positioning notch and the clearance notch.
[0018] By fitting the spring onto the push rod, the push rod limits the inner ring of the spring. The setting of the clearance notch and the positioning notch limits both ends of the outer ring of the spring, thereby improving the stability of spring compression and reset.
[0019] In the aforementioned inclined push block structure of the mold, the push block has a fixing hole along its width direction, and the end of the push rod has a pin hole. The end of the push rod is embedded in the push block and connected to the push block by passing through the fixing hole and the pin hole in sequence with a fixing pin.
[0020] The push block and push rod are quickly connected by passing the fixing pin through the fixing hole and the pin hole in sequence. This eliminates the need to process and open holes on the end face of the push block that fits with the product, ensuring the stability of the push block. In addition, the fixing pin method also allows for quick assembly and disassembly between the push block and the push rod, improving the convenience of installation.
[0021] In the aforementioned inclined push block structure of the mold, the push block is provided with a pre-positioning groove for the push rod to be inserted, and the side wall of one side of the push rod is planar and fits against the groove wall of the pre-positioning groove.
[0022] The pre-positioning groove and the push rod sidewall are designed to achieve circumferential limiting when the push rod and push block are connected, preventing the push rod and push block from rotating relative to each other in the circumferential direction and improving the stability of the connection between the push rod and push block.
[0023] In the inclined rod push block structure of the above-mentioned mold, the fixing block has a connecting hole along the axial direction of the push rod, and a positioning bolt is connected in the connecting hole. The end of the positioning bolt is fixedly connected to the push rod.
[0024] The positioning bolts ensure a stable connection between the fixing block and the push rod. The connection can also be made directly by thread, as long as the stability of the connection is guaranteed.
[0025] Compared with existing technologies, the inclined rod push block structure of this mold has the following advantages:
[0026] 1. The push block is designed in the shape of a long strip plate, which increases the side area of the push block and thus the contact area between the push block and the product. This avoids deformation of the product during pushing due to localized force. Since the push block is relatively large, it is equipped with a push rod and a fixed block to improve the stability of the fixed block against the guide rail during sliding. On the other hand, it achieves stable pushing and prevents the push block from displacing in other directions when moving along the push rod axis. This ensures normal demolding and improves the molding quality of the product.
[0027] 2. By having the side wall of the push block abut against the wall of the mounting groove and the fixed block abut against the guide groove, the push block is limited by the wall of the mounting groove and the fixed block when sliding relative to the inclined top when it moves along the width direction of the inclined top. This improves the stability of the push block and ensures the molding quality of the product. The cooperation between the fixed block and the guide groove, as well as the cooperation between the push block and the mounting groove, achieves limitation at both ends of the push rod, improving the stability of the push rod's sliding. Attached Figure Description
[0028] Figure 1 This is a front view of the present invention.
[0029] Figure 2 yes Figure 1Sectional view of AA.
[0030] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.
[0031] Figure 4 This is a partial structural schematic diagram of the present invention.
[0032] Figure 5 yes Figure 4 A partial sectional view along the middle BB.
[0033] Figure 6 This is a partial exploded view of this utility model.
[0034] In the diagram, 1 is the moving mold; 11 is the guide rail surface; 2 is the angled ejector; 21 is the mounting groove; 22 is the guide groove; 22a is the positioning notch; 23 is the guide hole; 3 is the push block; 31 is the fixing hole; 32 is the pre-positioning groove; 4 is the push rod; 41 is the pin hole; 5 is the fixing block; 51 is the clearance notch; 52 is the connecting hole; 6 is the elastic element; 7 is the fixing pin; and 8 is the positioning bolt. Detailed Implementation
[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0036] like Figure 1-3 As shown, the inclined pusher block structure of this mold includes a moving mold 1 and an inclined pusher 2 that slides within the moving mold 1. The inclined pusher 2 has an installation groove 21 on one side and a guide groove 22 on the other side. The middle of the inclined pusher 2 has a guide hole 23 that connects the installation groove 21 and the guide groove 22. The moving mold 1 has a guide rail straight surface 11 that is arranged along the mold opening direction. The length direction of the guide rail straight surface 11 intersects with the length direction of the inclined pusher.
[0037] Specifically, such as Figure 3 and Figure 5 As shown, the inclined push block structure includes a push block 3 in the shape of a long strip and set in the mounting groove 21 to abut against the product. A push rod 4 in the shape of a long strip is set in the inclined top 2. One end of the push rod 4 passes through the guide hole 23 and is fixed to the push block 3. The other end is connected to a fixing block 5. The end face of the fixing block 5 fits against the guide rail straight surface 11. An elastic member 6 is provided in the guide groove 22 for the end face of the fixing block 5 to press against the guide rail straight surface 11 when the inclined top 2 is pushed out.
[0038] By abutting the push block 3 against the product, the side of the push block 3 becomes the forming cavity surface during product molding. During mold opening, the inclined ejector 2 tilts and moves to achieve mold opening. The push block 3, push rod 4, and fixed block 5 tilt and move synchronously along the mold opening direction with the inclined ejector 2. The fixed block 5 fits against the guide rail surface 11. The pushing force of the elastic element 6 keeps the end face of the fixed block 5 in contact with the guide rail surface 11. The length direction of the guide rail surface 11 is along the mold opening direction, and its length direction intersects with the length direction of the inclined ejector 2, allowing the inclined ejector 2 to move along the mold opening direction... While moving, the fixed block 5 does not move along the width direction of the inclined ejector 2, but only moves along the mold opening direction. The elastic element 6 is compressed, and the fixed block 5 and the inclined ejector 2 move relative to each other in the width direction of the inclined ejector 2. By limiting the guide rail straight surface 11, the fixed block 5 does not move in the width direction of the inclined ejector 2, so that the fixed block 5 pushes out the push block 3 through the push rod 4. The push block 3 pushes out the product along the width direction of the inclined ejector 2, thereby achieving demolding. By using block positioning at both ends, the stability of demolding is improved.
[0039] To ensure the product can be stably ejected by the pusher block 3, a long strip-shaped pusher block 3 is used to increase the side area of the pusher block 3, thereby increasing the contact area between the pusher block 3 and the product. This avoids deformation of the product during pushing due to localized force. Since the pusher block 3 is relatively large, it is equipped with a push rod 4 and a fixing block 5. This improves the stability of the fixing block 5 against the guide rail surface 11 during sliding and ensures stable pushing. It also prevents the pusher block 3 from displacing in other directions when moving along the axis of the push rod 4, thus ensuring normal demolding and improving the molding quality of the product.
[0040] like Figure 3-5 As shown, the side wall of the push block 3 can abut against the wall of the mounting groove 21 and slide along the wall of the mounting groove 21. The fixing block 5 is a square block. The side wall of the fixing block 5 can abut against the side wall of the guide groove 22 and slide relative to the wall of the guide groove 22. The length of the push block 3 is greater than the length of the fixing block 5.
[0041] like Figure 3 and Figure 5 As shown, the elastic element 6 is a spring, which is sleeved on the push rod 4. The bottom of the guide groove 22 is recessed to form a positioning notch 22a, and the end face of the fixing block 5 is recessed to form a clearance notch 51. The two ends of the elastic element 6 are located in the positioning notch 22a and the clearance notch 51, respectively.
[0042] like Figure 5 and Figure 6As shown, the push block 3 has a fixing hole 31 along its width direction, and the end of the push rod 4 has a pin hole 41. The end of the push rod 4 is embedded in the push block 3 and connected to the push block 3 by passing through the fixing hole 31 and the pin hole 41 in sequence through the fixing pin 7. The push block 3 has a pre-positioning groove 32 for the push rod 4 to be embedded in. The side wall of one side of the push rod 4 is flat and fits against the groove wall of the pre-positioning groove 32.
[0043] like Figure 5 As shown, the fixing block 5 has a connecting hole 52 along the axial direction of the push rod 4, and a positioning bolt 8 is connected in the connecting hole 52. The end of the positioning bolt 8 is fixedly connected to the push rod 4.
[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A slanted pusher structure for a mold, the mold comprising a moving mold (1) and a slanted pusher (2) slidably disposed within the moving mold (1), wherein the slanted pusher (2) has an installation groove (21) on one side and a guide groove (22) on the other side, and a guide hole (23) connecting the installation groove (21) and the guide groove (22) is provided in the middle of the slanted pusher (2), wherein the moving mold (1) has a guide rail surface (11) disposed along the mold opening direction, the length direction of the guide rail surface (11) intersecting the length direction of the slanted pusher (2), characterized in that, This inclined pusher structure includes a pusher (3) in the shape of a long strip and set in the mounting groove (21) to abut against the product. A pusher (4) in the shape of a long strip is set in the inclined top (2). One end of the pusher (4) passes through the guide hole (23) and is fixed to the pusher (3). The other end is connected to a fixing block (5). The end face of the fixing block (5) fits against the guide rail straight surface (11). An elastic element (6) is provided in the guide groove (22) for the end face of the fixing block (5) to press against the guide rail straight surface (11) when the inclined top (2) is pushed out.
2. The inclined push block structure of the mold according to claim 1, characterized in that, The side wall of the pusher (3) can abut against the groove wall of the mounting groove (21) and slide along the groove wall of the mounting groove (21).
3. The inclined push block structure of the mold according to claim 1 or 2, characterized in that, The fixing block (5) is a square block, and the side wall of the fixing block (5) can abut against the side wall of the guide groove (22) and slide relative to the groove wall of the guide groove (22).
4. The inclined pusher block structure of the mold according to claim 1 or 2, characterized in that, The length of the pusher (3) is greater than the length of the fixed block (5).
5. The inclined push block structure of the mold according to claim 1 or 2, characterized in that, The elastic element (6) is a spring, which is sleeved on the push rod (4). The bottom of the guide groove (22) is recessed to form a positioning notch (22a), and the end face of the fixing block (5) is recessed to form a clearance notch (51). The two ends of the elastic element (6) are located in the positioning notch (22a) and the clearance notch (51) respectively.
6. The inclined push block structure of the mold according to claim 1 or 2, characterized in that, The push block (3) has a fixing hole (31) along its width direction, and the end of the push rod (4) has a pin hole (41). The end of the push rod (4) is embedded in the push block (3) and connected to the push block (3) by passing through the fixing hole (31) and the pin hole (41) in sequence through the fixing pin (7).
7. The inclined push block structure of the mold according to claim 6, characterized in that, The push block (3) has a pre-positioning groove (32) for the push rod (4) to be inserted. The side wall of the push rod (4) is flat and fits against the groove wall of the pre-positioning groove (32).
8. The inclined push block structure of the mold according to claim 1 or 2, characterized in that, The fixing block (5) has a connecting hole (52) along the axial direction of the push rod (4), and a positioning bolt (8) is connected in the connecting hole (52). The end of the positioning bolt (8) is fixedly connected to the push rod (4).