CN117656385A - Demoulding mechanism and mould suitable for complicated plastic products - Google Patents
Demoulding mechanism and mould suitable for complicated plastic products Download PDFInfo
- Publication number
- CN117656385A CN117656385A CN202311598335.3A CN202311598335A CN117656385A CN 117656385 A CN117656385 A CN 117656385A CN 202311598335 A CN202311598335 A CN 202311598335A CN 117656385 A CN117656385 A CN 117656385A
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- inclined top
- base
- plastic product
- sliding
- sliding support
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- 229920003023 plastic Polymers 0.000 title claims abstract description 77
- 239000004033 plastic Substances 0.000 title claims abstract description 77
- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000008602 contraction Effects 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 7
- 235000000396 iron Nutrition 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
Abstract
The invention provides a demoulding mechanism and a mould suitable for complex plastic products, comprising an inclined top, a sliding support and a base, wherein the bottom end of the inclined top is in running fit with the sliding support, and the top end of the inclined top is used for connecting the plastic products; the top of the inclined top is self-adaptively followed and shifted when the deformation occurs due to thermal expansion and cold contraction in the plastic product forming process, the inclined top pushes the plastic product to move towards the outside of the die when the plastic product is demoulded, and the movable fit relationship of the sliding support, the base and the bottom of the inclined top drives the top of the inclined top to move towards the direction away from the plastic product, so that the plastic product is demoulded smoothly. According to the invention, the top of the inclined top can synchronously rotate and shift along with the shrinkage of the product through the rotating structure at the bottom of the inclined top when the product is demolded, so that the problem that the product is pulled out due to the shrinkage of the plastic product and interference generated by the inclined top during the ejection in a single direction of the conventional inclined top is solved, the quality of the product is ensured, and the stable production of the die is ensured.
Description
Technical Field
The invention relates to the technical field of plastic product mold demolding, in particular to a demolding mechanism and a mold suitable for complex plastic products.
Background
The mould is a tool for manufacturing a molded article, and is mainly used for realizing the processing of the appearance of the article through the change of the physical state of a molded material, namely the tool for enabling a blank to be a workpiece with a specific shape and size under the action of external force, and is widely used for blanking, die forging, cold heading, extrusion, powder metallurgy part pressing, pressure casting and the compression molding or injection molding of engineering plastics, rubber, ceramic and other products.
For the plastic product 2 with complex appearance, as shown in fig. 6, a plurality of places are contacted with the inclined top 1 in the mold, because the temperature of the plastic product 2 is high (up to 300 ℃) during injection molding, the temperature gradually decreases during molding, and because of expansion caused by heat and contraction caused by cold, the plastic product 2 is easy to interfere with the inclined top 1 in the mold during demolding or during molding cooling, so that the plastic product 2 is damaged, as in fig. 7, a plurality of places of strain notches 21 exist on the part of the plastic product 2 after demolding, and the product quality is affected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a demoulding mechanism and a mould suitable for complex plastic products.
The invention provides a demoulding mechanism suitable for complex plastic products, which comprises an inclined top, a sliding support arranged at the bottom end of the inclined top and a base movably matched with the sliding support, wherein the bottom end of the inclined top is in running fit with the sliding support, and the top end of the inclined top is used for connecting the plastic products;
in the process of molding the plastic product, the top end of the inclined top is adaptively shifted when the plastic product deforms due to expansion caused by heat and contraction caused by cold, the bottom end of the inclined top is driven to move relative to the base due to the shift, the inclined top pushes the plastic product to move towards the outside of the mold when the plastic product is demolded, and the top of the inclined top is driven to generate first shift in the direction away from the plastic product due to the movable fit relation between the sliding support, the base and the bottom end of the inclined top, so that the plastic product is demolded smoothly.
Preferably, the bottom end of the inclined top can rotate relative to the sliding support around a first direction, the sliding support can rotate relative to the base around a second direction and can perform second displacement relative to the base in a third direction, wherein the first direction and the third direction are both located on a movable plane, and the second direction is perpendicular to the movable plane.
Preferably, the bottom end of the inclined top is in running fit with the sliding support through a first rotating shaft, the base is provided with an accommodating groove, both sides of the accommodating groove are provided with sliding grooves, sliding vanes capable of sliding are arranged in the sliding grooves in a matching mode, the sliding support is provided with a second rotating shaft, part or all of the second rotating shaft is arranged in the accommodating groove, both ends of the second rotating shaft are respectively connected with the sliding vanes, the axis direction of the first rotating shaft is a first direction, the axis direction of the second rotating shaft is a second direction, and the sliding direction of the sliding vanes is a third direction.
Preferably, there is a position such that the first direction and the third direction are the same direction when the slide holder rotates about the second rotation axis.
According to the mold, the mold comprises the demolding mechanism suitable for complex plastic products, and further comprises a rear mold bottom plate, a supporting component, an ejector pin component, a rear mold core and a driving mechanism, wherein the rear mold bottom plate is provided with a containing space, the top end of the base is fixed on the ejector pin component, the bottom of the base is arranged in the containing space, the plastic products are arranged on the rear mold core, the supporting component, the ejector pin component and the rear mold core are internally provided with an inclined top channel, the inclined top penetrates through the inclined top channel, and when the products are demolded, the driving mechanism can drive the ejector pin component to drive the base to move towards the direction of the plastic products so as to enable the inclined top to move along the inclined top channel, and the inclined top end is enabled to generate first displacement towards the direction far away from the plastic products due to the movable fit relation of the inclined top bottom.
Preferably, the support assembly comprises square iron and a B plate which are sequentially arranged on the rear die bottom plate in the upward direction, the rear die bottom plate, the square iron and the B plate jointly enclose a thimble space, and the thimble assembly is arranged in the thimble space.
Preferably, the thimble assembly comprises a thimble bottom plate and a thimble panel fixedly connected with the upper portion of the thimble bottom plate, the base is detachably fixed below the thimble bottom plate, a movement space is formed between the thimble panel and the B plate, and the driving mechanism can drive the thimble panel to move towards the movement space.
Preferably, the second displacement of the sliding support relative to the base in the third direction is limited by the rear die bottom plate or by the base.
Preferably, the pitched roof is disposed in a gap with the pitched roof channel and the gap allows the first displacement of the pitched roof tip.
Preferably, the driving mechanism is driven by oil pressure or air pressure.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the top of the inclined top can synchronously rotate and shift along with the shrinkage of the product through the rotating structure at the bottom of the inclined top when the product is demolded, so that the problem that the product is pulled out and deformed by the inclined top is solved simply and effectively by the innovative structure, the quality of the product is ensured, and the stable production of the die is ensured due to the interference of the plastic product formed by the shrinkage of the plastic product and the local part of the inclined top in the ejection process in the conventional single-direction ejection process.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of a demolding mechanism;
FIG. 2 is a schematic view of the direction of movement of the demolding mechanism during demolding;
FIG. 3 is a schematic view of the structure of the connection of the sliding support, the base and the inclined roof;
FIG. 4 is a schematic cross-sectional view of a mold;
FIG. 5 is an enlarged schematic view of the structure of the portion A in FIG. 4;
FIG. 6 is a schematic view of the structure of the plastic product and the connection of the top end of the pitched roof;
FIG. 7 is a prior art drawing of a post-mold plastic product with a localized plurality of strain relief notches;
FIG. 8 shows a plastic product after demolding according to the invention, which has a smooth and round appearance and no strain notches of the plastic product after demolding according to the prior art.
The figure shows:
pitched roof 1
Plastic product 2
Strain relief notch 21
Sliding support 3
First rotation shaft 31
Second spindle 32
Base 4
Accommodating groove 41
Sliding groove 42
Slip sheet 43
Rear die bottom plate 5
Thimble bottom plate 6
Thimble panel 7
Space for movement 71
Square iron 8
B plate 9
Rear mould core 10
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The invention provides a demoulding mechanism suitable for complex plastic products, which comprises an inclined top 1, a sliding support 3 arranged at the bottom end of the inclined top 1 and a base 4 in movable fit with the sliding support 3, wherein the bottom end of the inclined top 1 is in movable fit with the sliding support 3, the bottom of the sliding support 3 is in movable fit with the base 4, and the top end of the inclined top 1 is used for connecting plastic products 2. In the process of molding the plastic product 2, due to expansion caused by heat and contraction caused by cold, the plastic product 2 can shrink in the process of cooling and molding, so that displacement is generated, because the plastic product 2 is a complex structural member, some bulges or local structures of the plastic product 2 are easy to generate a pulling force with the top end of the inclined top 1 when the plastic product 2 is deformed, the top end of the inclined top 1 can adaptively shift when the plastic product 2 shrinks and deforms, and the bottom end of the inclined top 1 is driven to move relative to the base 4 due to the displacement, in addition, as shown in fig. 2, the inclined top 1 can push the plastic product 2 to move outside a mold under the driving force when the plastic product 2 is demolded, and the movable fit relation between the sliding support 3, the base 4 and the bottom end of the inclined top 1 can drive the top of the inclined top 1 to generate first displacement in the direction away from the plastic product 2, and actively leave the plastic product 2, so that the plastic product 2 is free from the pulling relation with the top of the inclined top 1, and the demolding is smooth, and the demolding quality of the product is ensured.
Specifically, the bottom end of the inclined top 1 can rotate relative to the sliding support 3 around the first direction, the sliding support 3 can rotate relative to the base 4 around the second direction and can perform second displacement relative to the base 4 in the third direction, wherein the first direction and the third direction are both located on the movable plane, and the second direction is perpendicular to the movable plane. In a specific embodiment, as shown in fig. 3 and 5, the bottom end of the inclined top 1 is in running fit with the sliding support 3 through the first rotating shaft 31, the base 4 is provided with an accommodating groove 41, both sides of the accommodating groove 41 are provided with sliding grooves 42, sliding vanes 43 capable of sliding are arranged in the sliding grooves 42 in a matching manner, the sliding support 3 is provided with a second rotating shaft 32, part or all of the sliding vanes are arranged in the accommodating groove 41, two ends of the second rotating shaft 32 are respectively connected with the sliding vanes 43, the bottom end of the inclined top 1, the sliding support 3 are in running fit, and the base 4 together form a universal movable structure, so that the bottom end of the inclined top 1 can swing in any direction relative to the base 4, wherein the axial direction of the first rotating shaft 31 is in a first direction, the axial direction of the second rotating shaft 32 is in a second direction, and the sliding direction of the sliding vanes 43 is in a third direction.
Specifically, the sliding support 3 and the base 4 can adopt various structures, such as a cuboid structure or a cube structure, and the sliding support 3 is of a hemispherical or cube structure and the like, and can be flexibly arranged according to actual application scenes so as to meet the requirements of product manufacturing.
The present invention also provides a mold, as shown in fig. 4, comprising a demolding mechanism, a rear mold base plate 5, a supporting component, a thimble component, a rear mold core 10 and a driving mechanism which are suitable for complex plastic products, wherein the driving mechanism can take various forms, such as oil pressure driving, pneumatic driving, motor driving, etc. The rear die bottom plate 5 is provided with a containing space, the top end of the base 4 is fixed on the ejector pin assembly, the bottom of the base 4 is arranged in the containing space, the plastic product 2 is arranged on the rear die core 10, the supporting assembly, the ejector pin assembly and the rear die core 10 are internally provided with an inclined top channel, the inclined top 1 penetrates through the inclined top channel, the inclined top 1 and the inclined top channel are in clearance arrangement, the clearance allows the top end of the inclined top 1 to generate first displacement, when the product is demolded, the driving mechanism can drive the ejector pin assembly to drive the base 4 to move towards the direction of the plastic product 2 so that the inclined top 1 moves along the inclined top channel and the top end of the inclined top 1 generates first displacement towards the direction far away from the plastic product 2 due to the movable fit relation of the bottom of the inclined top 1.
As shown in fig. 4, the supporting assembly comprises square iron 8 and B plates 9 which are sequentially arranged on the rear die bottom plate 5 in the upward direction, the rear die bottom plate 5, the square iron 8 and the B plates 9 jointly enclose a thimble space, and the thimble assembly is arranged in the thimble space. The thimble assembly comprises a thimble bottom plate 6 and a thimble panel 7 fixedly connected with the upper portion of the thimble bottom plate 6, the base 4 is detachably fixed below the thimble bottom plate 6, for example, by adopting screw connection, a movement space 71 is formed between the thimble panel 7 and the B plate 9, and the driving mechanism can drive the thimble panel 7 to move towards the movement space 71 so as to perform demoulding action.
It should be noted that, when the sliding support 3 generates the second displacement in the third direction relative to the base 4, the sliding vane 43 slides in the sliding groove 42, and the sliding stroke of the sliding vane 43 is limited by the rear mold bottom plate 5 or limited by the base 4, so that the sliding vane 43 has a limited movement range, and the precision of the mold is ensured.
The working principle of the invention is as follows:
in the process of molding the plastic product 2, due to expansion caused by heat and contraction caused by cold, the plastic product 2 can shrink and deform in the process of cooling and generate a pulling force with the top end of the inclined top 1, the top end of the inclined top 1 is stressed and has a tendency of inclination under the driving of the pulling force, and relative rotation and/or sliding between the bottom end of the inclined top 1 and the sliding support 3, between the sliding support 3 and the sliding sheet 43 and/or between the sliding sheet 43 and the base 4 occur under the driving of the tendency force, so that the top end of the inclined top 1 can adaptively shift to avoid the damage of the appearance of the plastic product 2 and the influence on the product quality.
When the plastic product 2 is demolded, the inclined top 1 pushes the plastic product 2 to move towards the outside of the die under the driving of the driving mechanism, and the sliding support 3, the base 4 and the movable fit relation of the bottom end of the inclined top 1 can drive the inclined top 1 to incline integrally so that the top of the inclined top 1 generates first displacement towards the direction away from the plastic product 2, and the inclined top is actively separated from the plastic product 2, so that the plastic product 2 gets rid of the pulling relation with the top of the inclined top 1 to be demolded smoothly, the demolding quality of the product is ensured, and the demolded plastic product 2 is shown in fig. 8, and the strain notch 21 in fig. 7 does not exist.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. The demolding mechanism suitable for the complex plastic products is characterized by comprising an inclined top (1), a sliding support (3) arranged at the bottom end of the inclined top (1) and a base (4) in movable fit with the sliding support (3), wherein the bottom end of the inclined top (1) is in rotary fit with the sliding support (3), and the top end of the inclined top (1) is used for connecting the plastic products (2);
the top of the inclined top (1) can adaptively shift when the plastic product (2) deforms due to thermal expansion and cold contraction in the molding process, the bottom of the inclined top (1) is driven to move relative to the base (4) due to the shift, the inclined top (1) pushes the plastic product (2) to move towards the outside of the mold when the plastic product (2) is demolded, and the top of the inclined top (1) is driven to generate first displacement in the direction away from the plastic product (2) due to the movable fit relation between the sliding support (3), the base (4) and the bottom of the inclined top (1), so that the plastic product (2) is demolded.
2. Demoulding mechanism for complex plastic products according to claim 1, characterized in that the bottom end of said oblique top (1) is rotatable with respect to said sliding support (3) about a first direction, said sliding support (3) being rotatable with respect to said base (4) about a second direction and being displaceable in a third direction with respect to said base (4), wherein said first and third directions are both situated on a mobile plane, said second direction being perpendicular to said mobile plane.
3. Demoulding mechanism suitable for complex plastic products according to claim 2, characterized in that the bottom end of the inclined top (1) is in running fit with the sliding support (3) through a first rotating shaft (31), the base (4) is provided with a containing groove (41), two sides of the containing groove (41) are provided with sliding grooves (42), sliding vanes (43) capable of sliding are arranged in the sliding grooves (42) in a matching mode, the sliding support (3) is provided with a second rotating shaft (32) and part or all of the sliding vanes are arranged in the containing groove (41), two ends of the second rotating shaft (32) are respectively connected with the sliding vanes (43), the axial direction of the first rotating shaft (31) is the first direction, the axial direction of the second rotating shaft (32) is the second direction, and the sliding direction of the sliding vanes (43) is the third direction.
4. A stripping mechanism for complex plastic products as claimed in claim 3, characterized in that there is a position when the slide support (3) is rotated about the second rotation axis (32) such that the first direction and the third direction are the same direction.
5. A mold, characterized in that, comprising the demolding mechanism suitable for complex plastic products according to any one of claims 1 to 4, further comprising a rear mold bottom plate (5), a supporting component, a thimble component, a rear mold core (10) and a driving mechanism, wherein the rear mold bottom plate (5) is provided with a containing space, the top end of the base (4) is fixed on the thimble component, the bottom of the base (4) is arranged in the containing space, the plastic product (2) is arranged on the rear mold core (10), an inclined top channel is arranged in the supporting component, the thimble component and the rear mold core (10), the inclined top (1) penetrates through the inclined top channel, and when the product is demolded, the driving mechanism can drive the thimble component to drive the base (4) to move towards the direction of the plastic product (2), so that the inclined top (1) moves along the inclined top channel and generates a first displacement towards the direction away from the plastic product (2) due to the movable fit relation of the bottom of the inclined top (1).
6. The mold according to claim 5, characterized in that the support assembly comprises square irons (8), B plates (9) arranged in sequence in the upward direction on the rear mold bottom plate (5), square irons (8), B plates (9) together enclosing a thimble space, the thimble assembly being arranged in the thimble space.
7. The mold according to claim 6, characterized in that the ejector pin assembly comprises an ejector pin base plate (6) and an ejector pin panel (7) fixedly connected with the upper part of the ejector pin base plate (6), the base (4) is detachably fixed below the ejector pin base plate (6), a movement space (71) is formed between the ejector pin panel (7) and the B plate (9), and the driving mechanism can drive the ejector pin panel (7) to move towards the movement space (71).
8. A mould according to claim 5, characterized in that the second displacement of the sliding support (3) with respect to the base (4) in a third direction is limited by the rear mould bottom plate (5) or by the base (4).
9. The mould according to claim 5, characterized in that the pitched roof (1) is arranged with the pitched roof channel gap and the gap allows the first displacement of the pitched roof (1) top end.
10. The mold of claim 5, wherein the driving mechanism is driven with oil pressure or air pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311598335.3A CN117656385A (en) | 2023-11-27 | 2023-11-27 | Demoulding mechanism and mould suitable for complicated plastic products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311598335.3A CN117656385A (en) | 2023-11-27 | 2023-11-27 | Demoulding mechanism and mould suitable for complicated plastic products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117656385A true CN117656385A (en) | 2024-03-08 |
Family
ID=90072529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311598335.3A Pending CN117656385A (en) | 2023-11-27 | 2023-11-27 | Demoulding mechanism and mould suitable for complicated plastic products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117656385A (en) |
-
2023
- 2023-11-27 CN CN202311598335.3A patent/CN117656385A/en active Pending
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