Large pitched roof demolding mechanism of injection mold
By introducing a slanted ejector mechanism and cooling water channels into the injection mold, the problems of long molding cycle, high cost and low stability in the demolding process of large plastic products are solved, achieving efficient and stable demolding and cooling effects, and ensuring product quality.
Patent Information
- Application Number
- CN202520012133.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing injection molds suffer from problems such as long molding cycles, high manufacturing costs, and low structural strength and stability during the demolding process of large plastic products. In particular, when dealing with undercut parts, quality problems such as flash, burrs, deformation, and breakage are prone to occur.
A large inclined ejector demolding mechanism for injection molds is adopted, including an ejector plate, an inclined ejector rod, an inclined ejector block, and a straightening rod. The inclined straightening rod is fixed between the base plate and the rear mold, and the inclined ejector guide sleeve is slidably fitted on it to enhance the structural stability. Cooling water channels are set inside the inclined ejector block to achieve uniform cooling.
It improves the accuracy and stability of the demolding process, avoids the offset and damage of the ejector pin, reduces mold costs, shortens the molding cycle, and ensures long-term stable operation of the mold and product quality.
Smart Images
Figure CN223750153U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection mold technical field, in particular to a kind of injection mold large-scale inclined ejector mechanism. BACKGROUND
[0002] In the injection molding process, for the plastic products with special structure, such as the products with reverse buckling, hole or complex shape, demolding is often a key and challenging link.
[0003] When facing the demolding of large plastic products with reverse buckling parts, the existing demolding mechanism has some significant problems. Traditional large reverse buckling usually adopts oil cylinder driven slider demolding, that is, the slider is ejected by the oil cylinder after the mold is opened, and the slider is reset by the oil cylinder before the mold is closed. This way not only has a long molding cycle, but also increases the molding time by at least 20%, and the mold manufacturing cost is high. The way of direct demolding by inclined ejector often shows insufficient structural strength and stability when handling large injection molded parts. Because the weight of the inclined ejector block is large, the inclined ejector rod is easily biased to one side under large stress, and after long-term use, the surface of the inclined ejector rod is excessively worn, which may cause quality problems such as flash and burr of the product. In addition, the inclined ejector rod may even deform or break, causing mold damage and production interruption. Therefore, it is necessary to improve the existing technology to overcome the defects in the prior art. SUMMARY
[0004] The problem to be solved by the utility model is to provide an injection mold large-scale inclined ejector mechanism to overcome the defects of long cycle, high manufacturing cost and low structural strength and stability of the existing injection mold for molding large plastic products with reverse buckling parts.
[0005] The utility model adopts the technical scheme to solve the technical problem: an injection mold large-scale inclined ejector mechanism, comprising: a needle plate, an inclined ejector rod and an inclined ejector block for molding the reverse buckling part of the product, the inclined ejector block is installed on the back mold of the injection mold, one end of the inclined ejector rod is slidably inserted into the back mold and fixedly connected with the inclined ejector block, and the needle plate is movably arranged below the back mold; the needle plate is fixed with an inclined ejector seat, the other end of the inclined ejector rod is fixed with an inclined ejector slider, and the inclined ejector slider is slidably installed on the inclined ejector seat; a righting rod with the same inclination angle as the inclined ejector rod is fixed between the bottom plate of the injection mold and the back mold, the inclined ejector guide sleeve is slidably sleeved on the righting rod, and the inclined ejector slider is fixedly connected with the inclined ejector guide sleeve.
[0006] As a further improvement of the utility model, the inclined sliding groove is provided on the inclined ejector seat, and the inclined ejector slider is slidably arranged in the inclined sliding groove.
[0007] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0008] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0009] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0010] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0011] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0012] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0013] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0014] As a further improvement of the utility model, the oblique top base comprises two symmetrical and spaced clamping plates, and the oblique sliding groove is arranged on the inner side surfaces of the two clamping plates facing each other.
[0015] The utility model discloses an injection mold large -scale inclined top demolding mechanism, through being fixed with the righting rod that the inclination angle is identical with inclined top rod between the bottom plate and rear mould of injection mold, the righting rod is slidably sleeved with inclined top guide bushing, not only can play the guiding effect for the movement of inclined top rod, and can increase the structural strength and stability of large -scale inclined top demolding mechanism, make the inclined top rod can bear the huge force that produces when demolding, and it is not easy to lean to one side, avoid the quality defect of product because of transition wear, also effectively avoid the problem of deformation and fracture of inclined top rod, ensure the movement accurate, stable in the demolding process, guarantee injection mold long -term stable operation, simultaneously, still reduced the mould oil circuit and oil cylinder, reduced the mould manufacturing cost, shortened the opening, the cylinder action time and the slider action time of mould, and then shorten the product's forming cycle, realize the purpose of remarkable cost reduction and benefit increase. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the perspective view of injection mold large -scale inclined top demolding mechanism of the utility model and rear mould assembly.
[0017] Figure 2 It is the sectional view of injection mold large -scale inclined top demolding mechanism of the utility model and rear mould assembly.
[0018] Figure 3 It is the perspective view of injection mold large -scale inclined top demolding mechanism of the utility model.
[0019] Figure 4 It is the perspective view of injection mold large -scale inclined top demolding mechanism of the utility model after removing the ejector rod plate and inclined top block.
[0020] Figure 5 It is the partial view of injection mold large -scale inclined top demolding mechanism of the utility model after removing the ejector rod plate and inclined top block.
[0021] Figure 6 It is the perspective view of inclined top rod, inclined top slider, righting rod, inclined top guide bushing, inclined top guide plate and support seat in the utility model.
[0022] Figure 7 It is the perspective view of righting rod and inclined top guide bushing in the utility model.
[0023] Make following description in conjunction with drawings:
[0024] 1, ejector rod plate;2, inclined top rod;3, inclined top block;4, rear mould;5, inclined top seat;501, inclined sliding groove;6, inclined top slider;601, accommodating groove;7, bottom plate;8, righting rod;801, V type groove;9, inclined top guide bushing;10, limit baffle;11, inclined top guide plate;12, support seat;13, pin;14, water inlet pipeline;15, water outlet pipeline;100, product. DETAILED DESCRIPTION
[0025] The preferred embodiments of the utility model are explained in detail below with reference to the drawings.
[0026] Referring to Figures 1 to 7 The utility model provides a large -scale inclined top demolding mechanism of injection mold, install on the back mould 4 of injection mold, wherein injection mold still includes the bottom plate 7 located back mould 4 below, and the bottom plate 7 is fixedly connected through mould foot between back mould 4.
[0027] The utility model discloses a large -scale inclined top demolding mechanism of injection mold includes: thimble board 1, inclined top rod 2 and be used for the inclined top block 3 of the inverted buckle part of product 100, the inclined top block 3 installs on the back mould 4 of injection mold, and the upper end of inclined top rod 2 is along certain inclination angle and is inserted in back mould 4 and is fixedly connected with inclined top block 3.
[0028] Further, the bottom of thimble board 1 is fixed with inclined top seat 5, the lower end of inclined top rod 2 is fixed with inclined top sliding block 6, and inclined top sliding block 6 is installed on inclined top seat 5 and can slide along the preset angle.
[0029] When product 100 is ejected, the external ejection driving device drives thimble board 1 to move upwards, and thimble board 1 drives inclined top sliding block 6 to slide along the preset angle on inclined top seat 5, while inclined top sliding block 6 drives inclined top rod 2 and inclined top block 3 to move obliquely upwards, synchronously ejecting with product 100, and realizing demolding.
[0030] It is worth mentioning that the utility model is fixed with the righting rod 8 consistent with the inclination angle of inclined top rod 2 between the bottom plate 7 and back mould 4 of injection mold, the inclined top guide sleeve 9 is slidably sleeved on the righting rod 8, and the inclined top sliding block 6 is fixedly connected to the inclined top guide sleeve 9; in the process of sliding on inclined top seat 5, inclined top sliding block 6 also drives inclined top guide sleeve 9 to slide along the righting rod 8. The utility model sets up righting rod 8 and inclined top guide sleeve 9, which not only plays a guiding role for the movement of inclined top rod 2, but also increases the structural strength and stability of the large -scale inclined top demolding mechanism, so that inclined top rod 2 can withstand the great force generated during demolding, is not easy to lean towards one side, avoids the quality defects of product 100 caused by excessive wear, effectively avoids the problems of deformation and fracture of inclined top rod 2, ensures accurate and stable movement during demolding, and ensures long-term stable operation of the injection mold; at the same time, the mold oil way and oil cylinder are also reduced, the mold manufacturing cost is reduced, the mold opening and closing cylinder action time and the sliding block action time are shortened, and then the molding cycle of product 100 is shortened, the purpose of remarkable cost reduction and benefit increase is realized.
[0031] Referring to Figure 2 And Figure 3The bottom of the rear mold 4 is fixed with an inclined ejection guide plate 11, the inclined ejection guide plate 11 is provided with a guide hole, the inclined ejection rod 2 is slidably inserted into the guide hole, and the inclined ejection rod 2 is further provided with a guide function, so that the movement of the inclined ejection block 3 is accurate and stable during demolding.
[0032] Referring to Figure 4 and Figure 5 The inclined ejection seat 5 is provided with an inclined sliding groove 501 matched with the inclined ejection sliding block 6, and the inclined ejection sliding block 6 is slidably arranged in the inclined sliding groove 501.
[0033] Further, the inclined ejection seat 5 is fixed with a limiting baffle 10 at both ends of the inclined sliding groove 501, the limiting baffle 10 is used for stopping the inclined ejection sliding block 6 when the inclined ejection sliding block 6 slides along the inclined sliding groove 501, so as to limit the movement stroke of the inclined ejection sliding block 6.
[0034] Referring to Figure 6 The inclined ejection sliding block 6 is arranged obliquely, and the lower end of the inclined ejection rod 2 is fixed on the inclined ejection sliding block 6 close to the left end through a screw; the right end of the inclined ejection sliding block 6 is provided with a receiving groove 601, and the inclined ejection sliding block 6 forms two fixed plates on the front and back of the receiving groove 601, and the inclined ejection guide sleeve 9 is located in the receiving groove 601, and the front and back of the inclined ejection guide sleeve 9 are fixedly connected with the two fixed plates of the inclined ejection sliding block 6 through fixed pins.
[0035] Referring to Figure 2 and Figure 6 The bottom plate 7 is fixed with a supporting seat 12, and the lower end of the righting rod 8 is fixed on the supporting seat 12, and the upper end of the righting rod 8 is fixed on the inclined ejection guide plate 11.
[0036] The two ends of the righting rod 8 are provided with V-shaped grooves 801, the inclined ejection guide plate 11 and the supporting seat 12 are provided with pins 13, the two V-shaped grooves 801 are correspondingly abutted on the two pins 13, and the inclination angle of the righting rod 8 and the inclined ejection rod 2 is consistent.
[0037] As shown in Figure 3 The inclined ejection rod 2 in the utility model is provided with but not limited to three, the upper end of the three inclined ejection rods 2 is fixedly connected with the inclined ejection block 3, for simultaneously supporting the inclined ejection block 3, so as to bear the large gravity of the inclined ejection block 3 and improve the stability. Correspondingly, the inclined ejection seat 5, the inclined ejection sliding block 6, the righting rod 8 and the inclined ejection guide sleeve 9 in the utility model are correspondingly provided with three.
[0038] The traditional demolding mechanism also has defects in cooling effect, and large injection molded parts need to be fully cooled in the molding process to prevent deformation and size deviation. However, the existing inclined top demolding mechanism often cannot effectively transfer the cooling medium to the key position, affecting the production efficiency and product quality. To this end, the utility model discloses a cooling water channel is arranged in the inside of the inclined top block 3, the cooling water channel is connected with the water inlet pipeline 14 and the water outlet pipeline 15, and the cooling medium is circulated and supplied to the cooling water channel in the inclined top block 3 through the water inlet pipeline 14 and the water outlet pipeline 15, so that the cooling medium can be uniformly distributed to the key position of the inclined top block 3, rapid and uniform cooling is realized, heat accumulation of the large inclined top block 3 in the molding process is avoided, the injection molding cycle is effectively shortened, the production efficiency is improved, and deformation and size deviation of the product 100 caused by uneven cooling are reduced.
[0039] Therefore, the injection mold large inclined top demolding mechanism can guide the movement of the inclined top rod 2, increase the structural strength and stability of the large inclined top demolding mechanism, enable the inclined top rod 2 to withstand the great force generated during demolding, prevent the inclined top rod 2 from leaning to one side, avoid quality defects of the product 100 caused by excessive wear, effectively avoid deformation and fracture of the inclined top rod 2, ensure accurate and stable movement during demolding, ensure long-term stable operation of the injection mold, reduce the mold oil circuit and the oil cylinder, reduce the mold manufacturing cost, shorten the mold opening and closing cylinder action time and the slider action time, thereby shorten the molding cycle of the product 100, and achieve the purpose of significantly reducing cost and increasing efficiency.
[0040] In the above description, many specific details are described in order to fully understand the utility model. However, the above description is only a preferred embodiment of the utility model, and the utility model can be implemented in many other ways different from the description, therefore, the utility model is not limited to the above disclosed specific implementation. Meanwhile, any person skilled in the art can make many possible changes and modifications to the utility model technical scheme disclosed above, or modify equivalent embodiments with equivalent changes, without departing from the scope of the utility model technical scheme. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the utility model, all still belong to the protection scope of the utility model technical scheme.
Claims
1. A large-scale inclined ejector demolding mechanism for an injection mold, comprising an ejector plate (1), an inclined ejector rod (2), and an inclined ejector block (3) for the undercut portion of a molded product (100), wherein the inclined ejector block (3) is mounted on the rear mold (4) of the injection mold, one end of the inclined ejector rod (2) is slidably inserted into the rear mold (4) and fixedly connected to the inclined ejector block (3), and the ejector plate (1) is movably disposed below the rear mold (4); characterized in that: The inclined top seat (5) is provided with an inclined sliding groove (501), and the inclined top sliding block (6) is slidably arranged in the inclined sliding groove (501).
2. The injection mold large angle ejection mechanism of claim 1, wherein: The inclined top seat (5) is provided with an inclined sliding groove (501), and the inclined top sliding block (6) is slidably arranged in the inclined sliding groove (501).
3. The injection mold large angle ejection mechanism of claim 2, wherein: The inclined top seat (5) includes two symmetrical and spaced apart clamping plates, and the inclined sliding groove (501) is arranged on the inner side faces of the two clamping plates facing each other.
4. The large angle ejection mechanism for injection mold according to claim 2, wherein: The inclined top seat (5) is provided with a limiting baffle (10) at both ends of the inclined sliding groove (501), and the limiting baffle (10) is used for stopping the inclined top sliding block (6) to limit the movement stroke of the inclined top sliding block (6).
5. The large angle ejection mechanism for injection molds of claim 1, wherein: One end of the inclined top sliding block (6) is provided with a containing groove (601), the inclined top guide sleeve (9) is located in the containing groove (601), and both sides of the inclined top guide sleeve (9) are fixedly connected with the inclined top sliding block (6) through fixing pins.
6. The injection mold large angle ejection mechanism of claim 1, wherein: The bottom of the back mold (4) is fixed with an inclined top guide plate (11), the inclined top guide plate (11) is provided with a guide hole, and the inclined top rod (2) is slidably inserted into the guide hole.
7. The injection mold large angle ejection mechanism of claim 6, wherein: The bottom plate (7) is fixed with a support seat (12), one end of the righting rod (8) is fixed on the support seat (12), and the other end of the righting rod (8) is fixed on the inclined top guide plate (11).
8. The injection mold large angle ejection mechanism of claim 7, wherein: Both ends of the righting rod (8) are provided with V-shaped grooves (801), the inclined top guide plate (11) and the support seat (12) are provided with pins (13), the two V-shaped grooves (801) are in one-to-one correspondence with the two pins (13), and the inclination angle of the righting rod (8) and the inclined top rod (2) is consistent.
9. The injection mold large angle ejection mechanism of claim 1, wherein: The inside of the inclined top block (3) is provided with a cooling water channel connected with an inlet water pipeline (14) and an outlet water pipeline (15).
10. The injection mold large angle ejection mechanism of claim 1, wherein: The inclined top rod (2) and the righting rod (8) are provided with a plurality of parallel arrangements.