Fixed mold side elastic block demolding mechanism of injection mold
By setting up a spring block and a slanted guide rod under the fixed mold plate, the problem of insufficient space in the moving mold plate was solved, enabling smooth demolding of plastic parts and providing more space for cooling water channels in the moving mold plate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-03-27
AI Technical Summary
When designing side grooves and convex corner structures, existing injection molds often have insufficient internal space in the moving mold plate, which makes it difficult for plastic parts to be demolded smoothly. In particular, it is difficult to puncture the inclined ejector pins in the moving mold plate.
A spring block is set below the fixed template. The inclined guide rod on the fixed column cooperates with the inclined guide hole of the spring block. Combined with the sliding structure of the limit block and the side slider, the side groove and convex corner of the plastic part can be demolded smoothly.
By reducing the space occupied by the core-pulling structure on the moving mold plate, the plastic parts can be demolded smoothly, and more space is provided for the moving mold plate to arrange cooling water channels.
Smart Images
Figure CN224044456U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection mold, in particular to injection mold fixed mold side elastic block demolding mechanism. BACKGROUND
[0002] When producing plastic parts by using injection mold, such as the upper body framework of the left / right front door of an automobile, since the structure is relatively complex, core pulling is needed in four directions of up, down, left and right, and the existing mode is usually to design the side close to the mold center of the plastic part into a relatively straight structure, so that when the mold is opened, the part on the movable mold side can drive the plastic part to move downward directly, so that the plastic part is demolded downward and can be smoothly ejected. However, with the increase of customer demand, in order to increase the three-dimensionality of the plastic part and make its appearance more beautiful, a side groove needs to be designed on the side close to the mold center of the plastic part, and a convex corner structure is designed on the side groove, which leads to the fact that the plastic part cannot be ejected when the mold is opened. Therefore, an inner core pulling structure for demolding the side groove and the convex corner needs to be designed in the mold, and the existing mode is usually to arrange an inner core pulling slider on the movable mold plate and arrange an inclined ejector structure on the upper and lower ejector plates, so that the inclined ejector rod of the inclined ejector structure passes through the movable mold plate to drive the inner core pulling slider, and after the mold is opened, the plastic part is ejected upward at the same time, the inner core pulling slider is driven by the inclined ejector rod of the inclined ejector structure to move upward with the plastic part and move inward, so that it is demolded from the side groove and the convex corner of the plastic part. However, for some injection molds with very compact movable mold plates (the inside of the movable mold plate is usually full of various cooling water channels and other straight ejector rod perforations, inclined ejector rod perforations, etc.), there is not enough space on one side of the movable mold plate to arrange the inclined ejector rod perforation, which leads to the fact that the plastic part cannot be smoothly demolded. SUMMARY
[0003] The utility model discloses a purpose to overcome the shortcomings of the prior art, provide a core pulling structure occupies the space of movable mold plate is less, be favorable to the movable mold plate in arranging more cooling water channels and other structures, guarantee that the plastic part can smoothly demold injection mold fixed mold side elastic block demolding mechanism.
[0004] The utility model discloses injection mold fixed mode side elastic block demolding mechanism's technical scheme is: including upper diaphragm and lower diaphragm, set up fixed mode plate under the upper diaphragm, set up fixed mode insert under fixed mode plate, set up perforation in the lower diaphragm, set up die foot on the lower diaphragm, set up upper thimble plate, lower thimble plate and thimble on the lower diaphragm between the die foot, injection molding machine top rod passes through the perforation and is contacted with lower thimble plate, set up movable mode plate on the die foot, set up movable mode insert and side core-pulling slider on movable mode plate, the fixed mode insert, movable mode insert and side core-pulling slider form the mould cavity between, there is injection moulded plastic part in the mould cavity, and the lower part of plastic part has lower recess, and lower recess cooperates with movable mode insert, and the right side edge outer wall of plastic part has side recess, and the upper portion of side recess sets up the convex angle, set up elastic block under fixed mode plate, and one side of elastic block cooperates with side recess, and elastic block is slid with fixed mode plate through the limit sliding structure, and sets up first inclined hole in the elastic block, sets up fixed column on movable mode plate, sets up inclined guide rod on fixed column, and inclined guide rod cooperates with first inclined hole.
[0005] Further, the first inclined hole is two groups, and the corresponding fixed column and inclined guide rod are two.
[0006] Further, the first inclined hole is rectangular in cross section, and the corresponding fixed column and inclined guide rod are rectangular in cross section.
[0007] Further, the lower surface of the inclined guide rod is provided with a wear-resistant pad.
[0008] Further, the limit sliding structure includes a limit block arranged below the fixed mode plate, and protruding side sliding blocks arranged on both sides of the elastic block, which are in sliding cooperation with the limit block.
[0009] Further, an inclined guide strip is arranged below the fixed mode plate, and an inclined guide groove is formed in the top of the elastic block, which cooperates with the inclined guide strip.
[0010] Further, an inclined guide column is arranged below the fixed mode plate, and a second inclined hole is formed in the side core-pulling slider, which cooperates with the inclined guide column.
[0011] The injection mold fixed mode side elastic block demolding mechanism has the following beneficial effects: since both sides of the plastic part need to be side core-pulled, and one side is close to the center of the mold, there is not enough space in the movable mode plate to arrange an inclined lifting structure, therefore, by arranging an elastic block below the fixed mode plate, cooperating the inclined guide rod on the fixed column with the first inclined hole of the elastic block, and cooperating the limit block with the side sliding blocks of the elastic block, the elastic block can move inward to pull out the side recess and the convex angle of the plastic part while the mold is gradually opened, the core-pulling structure occupies less space in the movable mode plate, which is conducive to arranging more cooling water paths and other structures in the movable mode plate, and ensures that the plastic part can be smoothly demolded. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1is the structure schematic view of the fixed mold side elastic block demolding mechanism of the injection mold of the utility model;
[0013] Figure 2 is Figure 1 the local enlarged view of A of the injection mold fixed mold side elastic block demolding mechanism of the utility model;
[0014] Figure 3 is the three-dimensional schematic view of the cooperation state of the side sliding block and the limiting block of the elastic block;
[0015] Figure 4 is Figure 3 the local enlarged view of B of the injection mold fixed mold side elastic block demolding mechanism of the utility model;
[0016] Figure 5 is Figure 3 the local enlarged view of C of the injection mold fixed mold side elastic block demolding mechanism of the utility model;
[0017] Figure 6 is the three-dimensional schematic view of the side recess and the convex corner arranged on the plastic part.
[0018] In the drawing: 1, upper return plate;2, lower return plate;3, fixed mold plate;4, fixed mold insert;6, through hole;7, mold foot;8, upper ejector plate;9, lower ejector plate;10, ejector pin;11, injection molding machine ejector rod;12, movable mold plate;13, movable mold insert;14, side core-pulling slider;15, plastic part;16, lower recess;17, side recess;18, convex corner;19, elastic block;20, first inclined guide hole;21, fixed column;22, inclined guide rod;23, wear-resistant pad;24, limiting block;25, side sliding block;26, inclined guide strip;27, inclined guide groove;28, inclined guide column;29, second inclined guide hole. Specific implementation
[0019] The utility model relates to a kind of injection mold fixed mold side elastic block demolding mechanism, such as Figure 1 — Figure 6As shown, it comprises upper and lower platens 1 and 2, a fixed mold plate 3 is arranged below the upper platen 1, a fixed mold insert 4 is arranged below the fixed mold plate 3, a through hole 6 is formed in the lower platen 2, a mold foot 7 is arranged on the lower platen 2, an upper ejector plate 8, a lower ejector plate 9 and an ejector pin 10 are arranged on the lower platen 2 between the mold feet 7, an injection molding machine ejector rod 11 passes through the through hole 6 and is in contact with the lower ejector plate 9, a movable mold plate 12 is arranged on the mold foot 7, a movable mold insert 13 and a side core-pulling slider 14 are arranged on the movable mold plate 12, a mold cavity is formed between the fixed mold insert 4, the movable mold insert 13 and the side core-pulling slider 14, an injection molded plastic part 15 is arranged in the mold cavity, the lower part of the plastic part 15 has a lower groove 16 which cooperates with the movable mold insert 13, the right side edge outer wall of the plastic part 15 has a side groove 17, the upper part of the side groove 17 is provided with a convex corner 18, a spring block 19 is arranged below the fixed mold plate 3, one side of the spring block 19 cooperates with the side groove 17, the spring block 19 is in sliding cooperation with the fixed mold plate 3 through a limiting sliding structure, a first inclined guide hole 20 is formed in the spring block 19, a fixed column 21 is arranged on the movable mold plate 12, an inclined guide rod 22 is arranged on the fixed column 21, and the inclined guide rod 22 cooperates with the first inclined guide hole 20.
[0020] Further, the first inclined guide hole 20 is two groups, and the corresponding fixed column 21 and inclined guide rod 22 are two. The two groups of first inclined guide holes 20 cooperate with the two inclined guide rods 22, and the action is more stable and reliable.
[0021] Further, the cross section of the first inclined guide hole 20 is rectangular, and the cross section of the corresponding fixed column 21 and inclined guide rod 22 is rectangular. The rectangular structure can be used to arrange a wear-resistant pad 23 on the lower side of the inclined guide rod 22, and on the other hand, it is beneficial to design the fixed column 21 into a vertical structure at the lower part and a slanting structure at the upper part.
[0022] Further, the lower surface of the inclined guide rod 22 is provided with a wear-resistant pad 23. Since the lower part of the inclined guide rod 22 cooperates with the inner wall of the first inclined guide hole 20 during mold opening and core pulling, the wear-resistant pad 23 is arranged at the lower part of the inclined guide rod 22 to increase its service life.
[0023] Further, the limiting sliding structure comprises a limiting block 24 arranged below the fixed mold plate 3, and protruding side sliding blocks 25 arranged on both sides of the spring block 19, which are in sliding cooperation with the limiting block 24. With the limiting block 24 and the side sliding blocks 25, the spring block 19 can only slide on one side of the fixed mold plate 3, which limits the spring block 19 and guides the sliding of the spring block 19.
[0024] Further, an inclined guide strip 26 is arranged below the fixed mold plate 3, and an inclined guide groove 27 is formed at the top of the spring block 19, which cooperates with the inclined guide strip 26. With the inclined guide strip 26 and the inclined guide groove 27, the sliding of the spring block 19 is further guided.
[0025] Further, the inclined guide column 28 is arranged below the fixed mold plate 3, and the second inclined guide hole 29 is arranged in the side core-pulling slider 14, and the inclined guide column 28 cooperates with the second inclined guide hole 29.
[0026] The beneficial effects of the injection mold fixed mold side elastic block demolding mechanism are as follows: after the plastic part 15 is injection molded, the lower return plate 2 drives the mold foot 7, the upper ejector plate 8, the lower ejector plate 9, the ejector pin 10, the movable mold plate 12, the movable mold insert 13, the side core-pulling slider 14, the fixed column 21 and the plastic part 15 to move downward together, while the upper return plate 1, the fixed mold plate 3 and the fixed mold insert 4 remain stationary, and the mold is gradually opened from the fixed mold plate 3 and the movable mold plate 12, at this time, the inclined guide rod 22 on the fixed column 21 cooperates with the first inclined guide hole 20 of the elastic block 19 below the fixed mold plate 3, under the guidance of the first inclined guide hole 20, the elastic block 19 can move along the inclined direction of the inclined guide rod 22, and the elastic block 19 also moves along the inclined direction of the limiting block 24 and the side slider 25, and moves along the inclined direction of the inclined guide strip 26 and the inclined guide groove 27 (the inclined direction and angle of the inclined guide strip 26 and the inclined guide groove 27 are consistent with the inclined direction and angle of the limiting block 24 and the side slider 25), so that the elastic block 19 can be pulled out of the side groove 17 and the convex corner 18 on the right side of the plastic part 15, until the inclined guide rod 22 is pulled out of the first inclined guide hole 20, at the same time, the inclined guide column 28 cooperates with the second inclined guide hole 29 of the side core-pulling slider 14, under the guidance of the inclined guide column 28, the side core-pulling slider 14 is pulled out to the left outer wall of the plastic part 15, after the core-pulling is completed on both sides of the plastic part 15, the mold is completely opened, finally the ejector rod 11 of the injection molding machine passes through the perforation 6 to push the upper and lower ejector plates 8 and 9, the upper and lower ejector plates 8 and 9 drive the ejector pin 10, the ejector pin 10 passes through the movable mold plate 12 and the movable mold insert 13, and the plastic part 15 with both sides of the core-pulling completed is pushed up and demolded. The injection mold fixed mold side elastic block demolding mechanism has the advantages that the core-pulling is performed on both sides of the plastic part 15, and one side is close to the center of the mold, so there is not enough space to arrange the inclined top structure in the movable mold plate 12, therefore, the elastic block 19 is arranged below the fixed mold plate 3, the inclined guide rod 22 on the fixed column 21 cooperates with the first inclined guide hole 20 of the elastic block 19, and the limiting block 24 cooperates with the side slider 25 of the elastic block 19, so that the elastic block 19 can move inward to pull out the side groove 17 and the convex corner 18 of the plastic part 15 while the mold is gradually opened, the core-pulling structure occupies less space in the movable mold plate 12, which is beneficial to arranging more cooling water paths and other structures in the movable mold plate 12, and ensures that the plastic part 15 can be smoothly demolded.
Claims
1. A mold fixed side of the injection mold ejector mechanism, including the upper plate (1) and the lower plate (2), in the upper plate (1) set up the fixed die plate (3), the fixed die plate (3) set up the fixed die insert (4), in the lower plate (2) open the through hole (6), the lower plate (2) set up the mold foot (7) on, the lower plate (2) between the mold foot (7) set up the upper ejector pin plate (8), the lower ejector pin plate (9) and the ejector pin (10), the injection molding machine ejector rod (11) passes through the through hole (6) and the lower ejector pin plate (9) contact, the mold foot (7) set up the movable die plate (12), the movable die plate (12) set up the movable die insert (13) and the side core-pulling slider (14), the fixed die insert (4), the movable die insert (13) and the side core-pulling slider (14) between the cavity is formed, the cavity has the injection molding plastic part (15), the lower part of the plastic part (15) has the lower groove (16), the lower groove is matched with the movable die insert (13), the right side edge outer wall of the plastic part (15) has the side groove (17), the upper part of the side groove (17) sets up the convex corner (18), characterized in that: The elastic block (19) is arranged below the fixed mold plate (3), one side of the elastic block (19) is matched with the side recess (17), the elastic block (19) is matched with the fixed mold plate (3) through the limiting sliding structure, the first inclined guide hole (20) is arranged in the elastic block (19), the fixed column (21) is arranged on the movable mold plate (12), the inclined guide rod (22) is arranged on the fixed column (21), and the inclined guide rod (22) is matched with the first inclined guide hole (20).
2. The ejector mechanism of the mold cavity of claim 1, wherein: The first inclined guide hole (20) is two groups, and the corresponding fixed column (21) and inclined guide rod (22) are two.
3. The ejector mechanism of claim 1, wherein: The first inclined guide hole (20) is a rectangular section, and the corresponding fixed column (21) and inclined guide rod (22) are rectangular sections.
4. The ejector mechanism of claim 1, wherein: The lower surface of the inclined guide rod (22) is provided with a wear-resistant pad (23).
5. The ejection mechanism for the fixed mold side spring block of the injection mold as described in claim 1, characterized in that: The limiting sliding structure comprises a limiting block (24) arranged below the fixed mold plate (3) and protruding side sliding blocks (25) arranged on both sides of the elastic block (19), and the side sliding blocks (25) are matched with the limiting block (24) in sliding.
6. The ejector mechanism of claim 1, wherein: The inclined guide strip (26) is arranged below the fixed mold plate (3), the inclined guide groove (27) is arranged at the top of the elastic block (19), and the inclined guide strip (26) is matched with the inclined guide groove (27).
7. The ejector mechanism of claim 1, wherein: The inclined guide column (28) is arranged below the fixed mold plate (3), the second inclined guide hole (29) is arranged in the side core-pulling slider (14), and the inclined guide column (28) is matched with the second inclined guide hole (29).