Multi-ejection demolding structure of forming mold
By using a multi-ejection structure in the molding die, the product is ejected twice through the synergistic action of the first and second ejection rods. This solves the problem of deformation and breakage caused by uneven force during a single ejection in traditional molds, and improves the yield rate of demolded products.
Patent Information
- Application Number
- CN202520530663.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-25
AI Technical Summary
When traditional molding dies are used for demolding, products with complex structures or thin walls are prone to deformation and breakage due to uneven force during the ejection process, resulting in a decrease in yield and an increase in scrap rate.
The system employs a multi-ejection structure. Through the coordinated action of the first and second ejector rods, the outer forming mold core and the inner forming mold core are first pushed together to detach the product from the mold core. Then, the inner forming mold core is pushed out of the product separately, thus achieving a two-stage ejection process.
It effectively prevents products from deforming or breaking due to uneven stress, significantly improves the product yield, and reduces the risk of breakage.
Smart Images
Figure CN223904462U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection mold technical field, concretely is a forming die multiple material ejection demolding structure. BACKGROUND
[0002] The traditional forming die usually only adopts the mode of one-time material ejection, that is, the formed product is ejected from the die through a single material ejection rod. However, for some products with complex structure, thin wall or special shape, one-time material ejection often cannot ensure that the product is completely intact and separated from the die. In the ejection process, the product may be deformed, broken or damaged due to uneven stress, thereby reducing the yield rate and increasing the scrap rate and production cost. SUMMARY
[0003] In view of the deficiencies of the prior art, the utility model provides a forming die multiple material ejection demolding structure, which solves the problems raised in the background art.
[0004] To achieve the above purpose, the utility model realizes the following technical scheme: a forming die multiple material ejection demolding structure, comprising a base, a lower die mounted on the upper part of the base and an upper die located above the lower die, a first material ejection rod and a second material ejection rod are respectively slidably arranged in the base, a mold core is fixedly installed in the lower die, an outer forming die core is movably arranged in the inside of the mold core, an inner forming die core is movably arranged in the inside of the outer forming die core, the top end of the second material ejection rod is connected with the outer forming die core, the top end of the first material ejection rod extends to the inside of the outer forming die core and is connected and fixed with the inner forming die core.
[0005] Further, an upper forming die core is installed in the inside of the upper die, and the upper forming die core, the outer forming die core and the inner forming die core can jointly form the forming structure of the product.
[0006] Further, the first material ejection rod and the outer forming die core are connected by sliding.
[0007] Further, the bottom ends of the first material ejection rod and the second material ejection rod are connected and fixed with the driving device of the external injection molding machine, and the driving device is a pneumatic cylinder or a hydraulic cylinder.
[0008] Further, the top end of the mold core protrudes from the top end of the lower die.
[0009] Further, the shapes of the outer forming die core and the inner forming die core are matched, and the two are in close contact.
[0010] The utility model provides a forming die multiple material ejection demolding structure. Compared with the prior art, the following beneficial effects are achieved:
[0011] The product is separated from the mold core by synchronously pushing the outer forming mold core and the inner forming mold core and the product as a whole to make the product separate from the mold core, and then the inner forming mold core is pushed alone to make the product pushed out from the inside of the outer forming mold core, so that the problems of deformation, breakage or damage of the product caused by uneven stress of one-time ejection are effectively avoided, the product breakage risk is significantly reduced, and the yield of product demolding is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a split structure schematic view of the utility model;
[0013] Figure 2 It is a structure schematic view of the base in the utility model;
[0014] Figure 3 It is a whole process schematic view of the product ejection in the utility model;
[0015] Figure 4 It is a half sectional view of the utility model after assembly.
[0016] In the drawing: 1, base; 11, first ejection rod; 12, second ejection rod; 2, lower mold; 21, mold core; 22, outer forming mold core; 23, inner forming mold core; 3, upper mold; 4, product. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0018] Please refer to Figures 1-4 The utility model provides a kind of technical solutions: a kind of forming mold multiple ejection demolding structure, including base 1, lower mold 2 being installed in the upper portion of base 1 and upper mold 3 being located above lower mold 2, first ejection rod 11 and second ejection rod 12 are slidably arranged in base 1, mold core 21 is fixedly installed in lower mold 2, outer forming mold core 22 is movably arranged in the inside of mold core 21, inner forming mold core 23 is movably arranged in the inside of outer forming mold core 22, the top end of second ejection rod 12 is connected with outer forming mold core 22, the top end of first ejection rod 11 extends to the inside of outer forming mold core 22, and is connected and fixed with inner forming mold core 23.
[0019] Upper mold 3 is installed with upper forming mold core, and upper forming mold core, outer forming mold core 22 and inner forming mold core 23 can form the forming structure of product together;
[0020] The first ejector pin 11 is in sliding connection with the outer forming core 22, and the bottom ends of the first ejector pin 11 and the second ejector pin 12 are fixedly connected with the driving device of the external injection molding machine, which is preferably a pneumatic cylinder or a hydraulic cylinder;
[0021] The top end of the mold core 21 protrudes from the mold core 21, the outer forming core 22 is matched with the inner forming core 23 in shape, and the two are in close contact;
[0022] When the product 4 is cured outside the upper forming core and the outer forming core 22 and the inner forming core 23 of the mold, the product 4 needs to be ejected, at this time the upper mold 3 and the lower mold 2 are opened, the product 4 is exposed to the environment, then the driving device of the external injection molding machine synchronously pushes the first ejector pin 11 and the second ejector pin 12 to rise, so that the outer forming core 22, the inner forming core 23 and the whole product 4 rise synchronously, at this time the product 4 is separated from the mold core 21, then the driving device of the external injection molding machine pushes the first ejector pin 11 alone, so that the inner forming core 23 and the whole product 4 are pushed out from the inside of the outer forming core 22, at this time the product 4 can be directly taken off by the worker or the mechanical hand. After the above-mentioned two ejection processes, the product 4 is not damaged during demolding, and the yield is higher.
Claims
1. A multi-time ejecting structure of a molding die, characterized by comprising: The utility model relates to a kind of injection molding machine, including base (1), lower mould (2) installed in the upper portion of the base (1) and upper mould (3) above the lower mould (2), first ejector rod (11) and second ejector rod (12) are respectively slidably arranged in the base (1), mould core (21) is fixedly installed in the lower mould (2), outer forming mould core (22) is movably arranged in the inside of the mould core (21), inner forming mould core (23) is movably arranged in the inside of the outer forming mould core (22), the top of the second ejector rod (12) is connected with the outer forming mould core (22), the top of the first ejector rod (11) extends to the inside of the outer forming mould core (22), and is connected with the inner forming mould core (23) fixedly.
2. A multi- ejecting demolding structure of a forming mold according to claim 1, wherein Upper forming mould core is installed in the inside of the upper mould (3), and the upper forming mould core and the outer forming mould core (22), inner forming mould core (23) can form the forming structure of product together.
3. A multi-ram ejector structure for a forming die according to claim 1, wherein, The first ejector rod (11) and the outer forming mould core (22) are slidably connected.
4. A multi-ram ejector structure for a forming die according to claim 1, wherein, The bottom of the first ejector rod (11) and the second ejector rod (12) is connected with the drive device of external injection molding machine fixedly, and the drive device is air cylinder or hydraulic oil cylinder.
5. A multi-ram ejector structure for a forming die according to claim 1 wherein, The top of the mould core (21) protrudes from the top of the lower mould (2).
6. A multi-ram ejector structure for a forming die according to claim 1, wherein, The shape of the outer forming mould core (22) and the inner forming mould core (23) is matched, and the two are attached.