Plastic part manufacturing mold convenient to demold
By designing slidable molding blocks and guide systems in the mold, the problem of difficult molding of plastic parts in complex structures is solved, and the smooth molding and production efficiency of plastic parts are achieved.
Patent Information
- Application Number
- CN202421478215.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-26
AI Technical Summary
When producing plastic parts with complex structures, traditional molds are prone to difficulties in the mold release process, which may lead to damage to the plastic parts or reduced production efficiency.
A mold including an open and closed upper mold and a lower mold is designed. The lower mold core is equipped with a fixed plate and a slidable forming block. Through the cooperation of the guide block and the guide column, the forming block is driven to slide to the outside, achieving the smooth mold release of the plastic parts.
It effectively solves the problem of difficult mold release of plastic parts in complex structures, avoids damage to plastic parts and reduces production efficiency, and improves the convenience of use of molds.
Smart Images
Figure CN222779950U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to a mold for making plastic parts which is easy to demould. Background Art
[0002] In the production process of plastic parts, the design of the mold has an important impact on the molding quality and production efficiency of the product. Traditional plastic molds usually include a fixed upper mold and a lower mold, which cooperate to form a molding cavity, and the plastic melt is injected into it to cool and mold. However, when the plastic part has a complex structure, especially with a protruding or recessed structure, the demolding process becomes difficult, which may cause damage to the plastic part or reduce production efficiency. In the prior art, ejector plates and ejectors are usually provided to assist demolding, but for plastic parts with complex side structures, there is still the problem of demolding difficulties. Utility Model Content
[0003] In view of this, the utility model provides a mold for making plastic parts which is easy to demould.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A mold for making plastic parts that is easy to demold, comprises an upper mold and a lower mold that can be opened and closed, the upper mold is provided with an upper mold core, the lower mold is provided with a lower mold core, the bottom of the upper mold core and the top of the lower mold core are respectively provided with an upper mold groove and a lower mold groove for molding plastic parts, the bottom of the lower mold core is embedded with a fixed plate, the fixed plate is provided with two left-right symmetrical molding blocks, the two molding blocks can be horizontally slidably arranged on the fixed plate, the inner side of the molding block is provided with two molding grooves for molding plastic parts, the molding block is provided with two oblique guide holes, the upper mold core is provided with two left-right symmetrical guide blocks, the guide blocks are correspondingly arranged above the molding blocks, the guide blocks are provided with two oblique guide columns, the guide columns are inserted into the guide holes at the bottom, the upper mold can move up and down when opening and closing, and when the upper mold moves upward, the molding blocks are driven to slide horizontally outward through the guide blocks and the guide columns.
[0006] In the preferred technical solution, the lower mold is provided with an ejector plate that can move up and down, and the ejector plate is provided with a plurality of ejectors that can pass through the lower mold core. The ejector can be driven by the ejector plate to move up and down, and the top of the ejector can protrude from the lower mold groove when it moves upward.
[0007] In a preferred technical solution, the fixing plate is recessed with a slide groove matching the two forming blocks, and the bottom of the forming block is embedded in the slide groove.
[0008] In the preferred technical solution, a first guide slope is provided on the outer side of the forming block, and a second guide slope matching the first guide slope is provided on the guide block. When the guide block is pressed down, the forming block is driven to move inward through the cooperation of the second guide slope.
[0009] In the preferred technical solution, the upper mold core is provided with a fixing groove for accommodating the guide block, the guide block is embedded in the fixing groove and connected to the upper mold core, the guide block is provided with a plurality of column holes, the guide column is embedded in the guide block through the column holes, and a column head larger than the column hole is provided on the top of the guide column.
[0010] In a preferred technical solution, the fixing plate is provided with a plurality of clearance grooves matching the guide posts, and the bottom of the guide posts can extend into the clearance grooves.
[0011] In a preferred technical solution, the lower mold core is provided with two slots through which the guide block and the forming block can pass.
[0012] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial technical effects:
[0013] The lower mold core is provided with a fixed plate, and the slidable molding block on the fixed plate can facilitate the side protruding structure in the plastic part. When the plastic part is molded, the upper mold is opened and the connected guide blocks and guide columns can drive the molding block to slide outward, so that the molding groove can be smoothly separated from the plastic part, which is convenient for demolding of the plastic part and avoids demolding difficulties or damage caused by the protruding structure on the side of the plastic part. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0015] Figure 1 The decomposition structure of the utility model is shown in FIG. Figure 1 .
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.
[0017] Figure 3 The decomposition structure of the utility model is shown in FIG. Figure 2 .
[0018] Figure 4 The decomposition structure of the utility model is shown in FIG. Figure 3 .
[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the plastic part.
[0020] Reference numerals: 100, upper die; 200, lower die; 110, upper die core; 210, lower die core; 101, upper die groove; 201, lower die groove; 220, fixing plate; 230, forming block; 231, forming groove; 232, guide hole; 120, guide block; 130, guide column; 240, ejector plate; 241, ejector; 221, slide groove; 233, first guide inclined plane; 121, second guide inclined plane; 102, fixing groove; 122, column hole; 131, column head; 222, clearance groove; 112, slot hole. DETAILED DESCRIPTION
[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0022] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "plurality" means two or more.
[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0024] For molds that are easy to demould, please refer to Figure 1-5, including an upper mold 100 and a lower mold 200 that can be opened and closed, the upper mold 100 is provided with an upper mold core 110, the lower mold 200 is provided with a lower mold core 210, the bottom of the upper mold core 110 and the top of the lower mold core 210 are respectively provided with an upper mold groove 101 and a lower mold groove 201 for molding plastic parts, when the upper mold 100 is closed to the lower mold 200, the upper mold core 100 fits the lower mold core 210, the upper mold groove 101 and the lower mold groove 201 are combined to form a molding cavity, and the melted plastic is injected into it for molding; generally, the upper mold 100 is provided with an injection channel connected to the upper mold groove 101, which is a prior art and will not be described in detail, the structure of the upper mold groove 101 and the lower mold groove 201 match the plastic parts to be produced, and the mold of the utility model can produce two plastic parts at the same time; Figure 5 The plastic part shown is the shape of the plastic part product produced in this embodiment. The plastic part includes a plate and hollow cylindrical structures of different sizes on the plate. A fixing plate 220 is embedded at the bottom of the lower mold core 210. A groove body matching the fixing plate 220 is provided in the lower mold core 210. The fixing plate 220 is embedded in the groove body to be fixed in the lower mold core 210. Two left-right symmetrical molding blocks 230 are provided on the fixing plate 220. The two molding blocks 230 can be horizontally slidably arranged on the fixing plate 220. Two molding grooves 231 for molding plastic parts are provided on the inner side of the molding blocks 230. The structure of the molding groove 231 corresponds to the largest cylindrical structure on the plastic part. After the two molding blocks 230 move inward at the same time, the molding grooves 231 on both sides are closed, and the plastic injected therein is molded into the molding groove 231 to form a cylindrical structure of the plastic part. In this embodiment, the upper mold 100 is also provided with a molding block that can be embedded in the inner side of the molding groove 231, so that a hollow structure is formed inside the cylindrical structure. The forming block 230 is provided with two oblique guide holes 232, and the upper mold core 210 is provided with two left-right symmetrical guide blocks 120, the guide blocks 120 are correspondingly arranged above the forming block 230, and the guide blocks 120 are provided with two oblique guide posts 130, and the lower part of the guide posts 130 is inserted into the guide holes 232. The upper mold can move up and down when opening and closing. When the upper mold 100 is opened, it moves upward and drives the forming block 230 to slide horizontally outward through the guide blocks 120 and the guide posts 130; because the largest central control cylindrical structure on the plastic part has a convex ring structure on the outside Therefore, it is difficult to demold the plastic directly after it is molded inside the molding groove 231. In the utility model, when the upper mold 100 moves upward, the guide block 120 moves upward at the same time, and the guide block 120 pulls the guide column 130 to move upward. When the guide column 130 embedded in the guide hole 231 moves upward vertically, the molding block 230 will be driven to move outward due to the oblique guide structure. The two guide blocks 120 move outward at the same time, and the molding groove 231 can be smoothly separated from the plastic part, so that the plastic part can be demolded smoothly, avoiding the plastic part being unable to be demolded or damaged during demolding due to the protruding structure on the side.
[0025] Furthermore, the lower mold 200 is provided with an ejector plate 240 that can move up and down. The ejector plate 240 is provided with a plurality of ejector pins 241 that can pass through the lower mold core 210. The ejector pins 241 can be driven by the ejector plate 240 to move up and down. When the ejector pins 241 move upward, the tops of the ejector pins 241 can protrude out of the lower mold groove 201. After the plastic part is molded, the ejector plate 240 moves upward to drive the ejector pins 241 to protrude upward out of the lower mold groove 201, so that the molded plastic part is lifted up to complete demolding.
[0026] Furthermore, the fixing plate 220 is recessed with a slide groove 221 matching the two molding blocks 230, and the bottom of the molding block 230 is embedded in the slide groove 221. The molding block 230 is fixed in the slide groove 221 and is restricted by the slide groove 221, so that the molding block 230 can slide inward or outward along the slide groove 221, ensuring the stability of the molding block 230 when sliding; a first guide slope 233 is provided on the outer side of the molding block 230, and a second guide slope 233 matching the first guide slope 233 is provided on the guide block 120. When the guide block 120 is pressed down, the cooperation of the second guide slope 121 and the second guide slope 233 drives the molding block 230 to move inward. When the upper mold 100 is closed to the lower mold 200, the guide block 120 moves down with the upper mold 100, and the guide block 120 presses against the molding block 230. The two molding blocks 230 slide inward and close at the same time, so that the plastic parts can be molded through the closed molding grooves 231 on both sides.
[0027] Furthermore, the upper mold core 110 is provided with a fixing groove 102 for accommodating the guide block 120, the guide block 120 is embedded in the fixing groove 102 and connected to the upper mold core 110, the shape of the fixing groove 102 matches the guide block 120, and the guide block 120 is embedded in the fixing groove 102 and connected to the upper mold core 110 to improve the connection stability between the two; the guide block 120 is provided with two column holes 122, the guide column 130 is embedded in the guide block 120 through the column holes 122, and the top of the guide column 130 is provided with a column head 131 larger than the column hole 122, and the guide column 130 is clamped on the guide block 120 through the column head 131, so that the guide column 130 can move up and down with the upper mold 100; the fixing plate 220 Two clearance grooves 222 matching with the guide column 130 are provided on the upper part, and the bottom of the guide column 130 can extend into the clearance groove 222. When the upper mold 100 is closed to the lower mold 200, the guide column 130 moves downward, and the bottom extends into the clearance groove 222, ensuring that the length of the guide column 130 is long enough, and will not separate from the molding block 230 in the process of moving upward to drive the molding block 230, and avoid the guide column 130 from being too long and touching the fixed plate 220 when the upper mold 100 is closed; the lower mold core 110 is provided with two slots 112 for the guide block 120 and the molding block 230 to pass through. When the upper mold 100 moves downward, the guide block 120 passes through the slot 112 to smoothly press down the molding block 230.
[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mold for making plastic parts that is easy to demould, comprising an upper mold (100) and a lower mold (200) that can be opened and closed, wherein the upper mold (100) is provided with an upper mold core (110), and the lower mold (200) is provided with a lower mold core (210), and the bottom of the upper mold core (110) and the top of the lower mold core (210) are respectively provided with an upper mold groove (101) and a lower mold groove (201) for molding the plastic parts, characterized in that: The bottom of the lower mold core (210) is embedded with a fixing plate (220), and the fixing plate (220) is provided with two left-right symmetrical molding blocks (230), and the two molding blocks (230) can be horizontally slidably arranged on the fixing plate (220), and the inner side of the molding block (230) is provided with two molding grooves (231) for molding plastic parts, and the molding block (230) is provided with two oblique guide holes (232), and the upper mold core (110) is provided with left and right Two symmetrical guide blocks (120), the guide blocks (120) are correspondingly arranged above the forming blocks (230), two oblique guide columns (130) are arranged on the guide blocks (120), the guide columns (130) are inserted into the guide holes (232) at the bottom, the upper mold (100) can move up and down when opening and closing, and when the upper mold (100) moves upward, the forming blocks (230) are driven to slide horizontally outward through the guide blocks (120) and the guide columns (130).
2. The mold for making plastic parts that is easy to demould according to claim 1, characterized in that: The lower mold (200) is provided with an ejector plate (240) that can move up and down. The ejector plate (240) is provided with a plurality of ejector pins (241) that can pass through the lower mold core (210). The ejector pins (241) can be driven by the ejector plate (240) to move up and down. When the ejector pins (241) move upward, their tops can protrude from the lower mold groove (201).
3. The mold for making plastic parts that is easy to demould according to claim 1, characterized in that: The fixing plate (220) is recessed with a slide groove (221) matching the two forming blocks (230), and the bottom of the forming block (230) is embedded in the slide groove (221).
4. The mold for making plastic parts that is easy to demould according to claim 1, characterized in that: A first guiding inclined surface (233) is provided on the outer side of the forming block (230), and a second guiding inclined surface (121) matching the first guiding inclined surface (233) is provided on the guiding block (120); when the guiding block (120) is pressed downward, the forming block (230) is driven to move inward by the cooperation between the second guiding inclined surface (121) and the first guiding inclined surface (121).
5. The mold for making plastic parts that is easy to demould according to claim 1, characterized in that: The upper mold core (110) is provided with a fixing groove (102) capable of accommodating a guide block (120); the guide block (120) is embedded in the fixing groove (102) and connected to the upper mold core (110); the guide block (120) is provided with a plurality of column holes (122); the guide column (130) is embedded in the guide block through the column holes (122); and a column head (131) larger than the column hole (122) is provided at the top of the guide column (130).
6. The mold for making plastic parts that is easy to demould according to claim 1, characterized in that: The fixing plate (220) is provided with a plurality of clearance grooves (222) matching the guide posts (130), and the bottom of the guide posts (130) can extend into the clearance grooves (222).
7. The mold for making plastic parts that is easy to demould according to claim 1, characterized in that: The lower mold core (210) is provided with two slots (112) through which the guide block (120) and the forming block (230) can pass.