Anti-overflow forming die structure
By introducing an anti-overflow component into the injection mold, and utilizing the cooperation of a rotating cylinder and a wedge block, the anti-overflow block moves to block the molding cavity, solving the problem of plastic material overflow during injection molding and achieving higher molding accuracy and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-03-03
AI Technical Summary
In existing injection molds, gaps easily appear between the forming concave plate and the forming convex plate during the injection process, causing plastic material to overflow, and there is a lack of effective overflow prevention design.
An anti-overflow component was designed, including a fixed frame and an anti-overflow frame. Through the cooperation of a pressure component and an anti-overflow sliding component, the anti-overflow block is moved and fits against the anti-overflow frame by the cooperation of a rotating cylinder and an inclined block, thus blocking the molding cavity and preventing plastic material from overflowing.
It effectively prevents the injected plastic material from overflowing from the gap between the molding concave plate and the molding convex plate, thus improving the precision of injection molding and product quality.
Smart Images
Figure CN223961628U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of molding die technology, and specifically relates to a molding die structure that prevents overflow. Background Technology
[0002] A molding die is a tool used to give materials a specific shape. It is widely used in various fields of manufacturing. Molding dies are classified according to molding process into injection molds, die-casting molds, stamping dies, and forging dies. Injection molds are mainly used for molding thermoplastics. An injection mold consists of an upper mold base and a lower mold base. A molding concave plate is fixed on the lower mold base, and a molding convex plate is fixed on the upper mold base. When the injection mold is working, plastic granules are heated and melted in the barrel. The upper and lower mold bases are then joined together, meaning the molding concave plate and the molding convex plate are attached. The granules are injected into the cavity of the joined molding concave plate at high pressure and high speed through an injection device. After cooling and solidification, the plastic product is obtained, such as common plastic casings like mobile phone cases and computer casings.
[0003] When injection molding plastic housing products, the molding concave plate and molding convex plate are fitted together, and the plastic material is formed in the molding cavity. During injection molding, if the injection pressure is too high or the injection speed is too fast, the injected plastic material quickly fills the mold cavity, generating a large impact force. This may cause a tiny gap to open between the molding concave plate and molding convex plate, and the injected plastic material may overflow from this gap. The lack of an anti-overflow design on the molding concave plate and molding convex plate is a drawback.
[0004] Existing injection molds lack spill-proof designs on the forming concave and convex plates. To address this, this application proposes a spill-proof molding mold structure. Utility Model Content
[0005] The purpose of this invention is to provide an anti-overflow molding die structure to solve the problem mentioned in the background art that there is no anti-overflow design on the molding concave plate and molding convex plate.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an overflow-proof molding die structure, comprising...
[0007] A molding die mechanism for manufacturing plastic shell products includes a lower die base and an upper die base. A molding concave template is fixed to the lower die base by bolts. An integrally cast partition frame is provided inside the molding concave template. A molding convex template is fixed to the upper die base by screws and bolts. A molding convex head is welded onto the molding convex template.
[0008] The anti-overflow component includes a fixing frame sleeved on the outside of the molded protrusion and an anti-overflow frame welded to the fixing frame;
[0009] The pressure assembly includes a connecting column fixed to the forming convex template by screws, a fixing plate welded to the bottom end of the connecting column, an inclined plate welded to the fixing plate at one end, and a rotating cylinder rotatably connected to the inclined plate at both ends.
[0010] An anti-overflow sliding assembly includes a moving component and an anti-overflow element. The moving component includes a fixed shaft, a moving slider slidably connected to the fixed shaft, a return spring sleeved on the outside of the fixed shaft, and a connecting block fixed to the moving slider by bolts. The anti-overflow element includes an anti-overflow block fixed to the connecting block by screws, an inclined block welded to the anti-overflow block, and a semi-cylinder welded to the inclined block.
[0011] Preferably, the fixing frame and the anti-overflow frame are frame structures, the cross-section of the anti-overflow frame is a right-angled triangle, and the center of the fixing frame and the anti-overflow frame forms an installation groove that mates with the forming protrusion. The geometry of the installation groove is the same as that of the forming protrusion.
[0012] Preferably, the connecting column is a square column structure, and the fixing plate is a cuboid plate structure.
[0013] Preferably, the two ends of the fixed shaft are welded to the forming concave template and the partition frame, respectively, and the two ends of the rebound spring are connected to the partition frame and the movable slider, respectively.
[0014] Preferably, the cross-section of the overflow block is a right-angled trapezoid, and the inclined surface of the overflow block is opposite to and parallel to the inclined surface of the overflow frame.
[0015] Preferably, the inclined block is a three-dimensional structure of a right-angled triangle, and the outer circular surface of the rotating cylinder is in rolling contact with the outer surface of the semi-cylinder.
[0016] Preferably, the molded concave template has an internal concave cavity, the partition frame divides the cavity into a molding cavity and a movable cavity, the plastic shell product is located in the molding cavity, the anti-overflow sliding component is located in the movable cavity, and the bottom surface of the anti-overflow block is flush with the top surface of the partition frame.
[0017] Preferably, the lower mold base includes a base plate a, a side plate b, a fixed top plate c, a lifting plate e, an ejector pin f, and a guide post d.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] In this invention, the forming concave template and the forming convex template have an anti-overflow design. When the forming convex template and the forming concave template are joined together, the rotating cylinder squeezes the semi-cylinder on the inclined block, thereby causing the anti-overflow block to move. The anti-overflow block moves and fits with the corresponding anti-overflow frame. The space between the forming convex head and the partition frame is the forming cavity. The anti-overflow block and the anti-overflow frame cover the forming cavity to prevent the injected plastic material from overflowing from the gap in the forming cavity. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 For the present utility model Figure 1 Enlarged structural diagram of section A in the middle;
[0022] Figure 3 This is a cross-sectional view of the forming concave template of this utility model.
[0023] Figure 4 For the present utility model Figure 3 Enlarged structural diagram of section B in the middle;
[0024] Figure 5 This is a three-dimensional structural diagram of the fixing frame of this utility model;
[0025] Figure 6 This is a top view of the molding concave template of this utility model.
[0026] In the diagram: 1. Lower mold base; 2. Forming concave mold plate; 3. Upper mold base; 4. Forming convex mold plate; 7. Plastic shell product; 9. Anti-overflow block; 21. Separator frame; 41. Forming protrusion; 51. Connecting column; 52. Fixing plate; 53. Inclined plate; 54. Rotating cylinder; 61. Fixing frame; 62. Anti-overflow frame; 81. Fixing shaft; 82. Moving slider; 83. Rebound spring; 84. Connecting block; 91. Inclined block; 92. Semi-cylinder. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figures 1 to 6This utility model provides a technical solution: an anti-overflow molding die structure, including a molding die mechanism for molding a plastic shell product 7, comprising a lower die base 1 and an upper die base 3. The structure and principle of the lower die base 1 and the upper die base 3 are existing technologies and will not be described in detail in this application. The plastic shell product 7 in this application is an open square plastic shell structure. A molding concave template 2 is fixed to the lower die base 1 by bolts. The molding concave template 2 has an integrally cast partition frame 21. A molding convex template 4 is fixed to the upper die base 3 by screws and bolts. A molding protrusion 41 is welded to the molding convex template 4. When the lower die base 1 and the upper die base 3 are closed, the molding concave template 2 and the molding convex template 4 fit together, forming... The protruding head 41 is embedded inside the molding concave template 2. The injected plastic material is formed into a plastic shell product 7 in the cavity between the molding concave template 2 and the molding protruding head 41. The specific principle is existing technology and will not be described in further detail in this application. The anti-overflow component includes a fixing frame 61 sleeved on the outside of the molding protruding head 41 and an anti-overflow frame 62 welded to the fixing frame 61. The fixing frame 61 is fixed to the molding protruding head 41 by bolts. When the molding concave template 2 and the molding protruding template 4 are in contact, the fixing frame 61 and the anti-overflow frame 62 are designed on the outside of the molding protruding head 41 to prevent the plastic material from overflowing. The pressure component includes a connecting post 51 fixed to the molding protruding template 4 by screws and a pressure component connected to the bottom end of the connecting post 51 by screws. The system includes a welded fixed plate 52, an inclined plate 53 welded to the fixed plate 52 at one end, and a rotating cylinder 54 rotatably connected to the inclined plate 53 at both ends. When the forming convex mold 4 moves down with the upper mold base 3 and the forming convex mold 4 and the forming concave mold 2 are closed, the pressure component acts on the anti-overflow sliding component, that is, the rotating cylinder 54 presses the semi-cylinder 92 on the inclined block 91, thereby causing the anti-overflow block 9 to move. The pressure component plays the role of adjusting the position of the anti-overflow block 9. The anti-overflow sliding component includes a moving component and an anti-overflow component. The moving component includes a fixed shaft 81, a moving slider 82 slidably connected to the fixed shaft 81, a spring 83 sleeved on the outside of the fixed shaft 81, and a connecting block 84 fixed to the moving slider 82 by bolts. The movable slider 82 moves along the axis of the fixed shaft 81. The moving slider 82 will compress the return spring 83, and the return spring 83 will generate the elastic force to rebound the movable slider 82. The anti-overflow component includes an anti-overflow block 9 fixed to the connecting block 84 by screws, an inclined block 91 connected to the anti-overflow block 9 by welding, and a semi-cylinder 92 connected to the inclined block 91 by welding. When the forming protrusion 4 moves down, the rotating cylinder 54 compresses the semi-cylinder 92 on the inclined block 91, thereby causing the anti-overflow block 9 to move. The anti-overflow block 9 moves and fits with the corresponding anti-overflow frame 62. The space between the forming protrusion 41 and the partition frame 21 is the forming cavity. The anti-overflow block 9 and the anti-overflow frame 62 cover the forming cavity to prevent the injected plastic material from overflowing from the gap of the forming cavity.
[0029] In this embodiment, the fixing frame 61 and the anti-overflow frame 62 are frame structures. The cross-section of the anti-overflow frame 62 is a right-angled triangle. The center of the fixing frame 61 and the anti-overflow frame 62 forms an installation groove that mates with the forming protrusion 41, which facilitates the installation of the fixing frame 61 and the anti-overflow frame 62 on the outside of the forming protrusion 41. The geometry of the installation groove is the same as that of the forming protrusion 41. The corresponding suitable fixing frame 61 and anti-overflow frame 62 can be replaced according to the different shapes of the forming protrusion 41.
[0030] In this embodiment, the connecting column 51 is a square column structure, and the fixing plate 52 is a cuboid plate structure. Both the connecting column 51 and the fixing plate 52 are solid structures and have a certain structural strength.
[0031] In this embodiment, the two ends of the fixed shaft 81 are respectively welded to the forming concave template 2 and the partition frame 21, and the two ends of the rebound spring 83 are respectively connected to the partition frame 21 and the movable slider 82. The movable slider 82 moves along the axial direction of the fixed shaft 81. The moving movable slider 82 will squeeze the rebound spring 83, and the rebound spring 83 will generate the elastic force to rebound the movable slider 82.
[0032] In this embodiment, the cross-section of the anti-overflow block 9 is a right-angled trapezoid. The inclined surface of the anti-overflow block 9 is opposite to and parallel to the inclined surface of the anti-overflow frame 62. The inclined surface of the anti-overflow block 9 can fit into the inclined surface of the anti-overflow frame 62.
[0033] In this embodiment, the inclined block 91 is a three-dimensional structure of a right triangle. The outer circular surface of the rotating cylinder 54 rolls in contact with the outer surface of the semi-cylinder 92. When the forming convex template 4 moves down with the upper mold base 3 and the forming convex template 4 and the forming concave template 2 are closed, the rotating cylinder 54 squeezes the semi-cylinder 92 on the inclined block 91, thereby causing the anti-overflow block 9 to move and play the role of adjusting the position of the anti-overflow block 9.
[0034] In this embodiment, the inside of the molding concave template 2 is provided with a concave cavity. The partition frame 21 divides the cavity into a molding cavity and a movable cavity. The plastic shell product 7 is located in the molding cavity, and the anti-overflow sliding component is located in the movable cavity. The bottom surface of the anti-overflow block 9 is flush with the top surface of the partition frame 21. The anti-overflow block 9 serves to prevent plastic material from overflowing from the molding cavity.
[0035] In this embodiment, the lower mold base 1 includes a base plate a, a side plate b, a fixed top plate c, a lifting plate e, an ejector pin f, and a guide post d. The structure and principle of the lower mold base 1 are existing technologies and will not be described in detail in this application.
[0036] Working principle and usage process of this utility model:
[0037] When the lower mold base 1 and the upper mold base 3 are closed, the forming concave mold plate 2 and the forming convex mold plate 4 are attached to each other, the forming convex head 41 is embedded in the interior of the forming concave mold plate 2, and the injected plastic material is formed into a plastic shell product 7 in the cavity between the forming concave mold plate 2 and the forming convex head 41.
[0038] When the forming convex template 4 moves down with the upper mold base 3, and the forming convex template 4 and the forming concave template 2 are closed, the pressure component acts on the anti-overflow sliding component, that is, the rotating cylinder 54 squeezes the semi-cylinder 92 on the inclined block 91, thereby causing the anti-overflow block 9 to move. The pressure component plays the role of adjusting the position of the anti-overflow block 9.
[0039] The anti-overflow block 9 is fixedly connected to the movable slider 82. The anti-overflow block 9 drives the movable slider 82 to move in the same direction. The movable slider 82 compresses the rebound spring 83, and the rebound spring 83 generates the elastic force to rebound the movable slider 82.
[0040] The anti-overflow block 9 moves and fits with the corresponding anti-overflow frame 62. The space between the molding protrusion 41 and the partition frame 21 is the molding cavity. The anti-overflow block 9 and the anti-overflow frame 62 cover the molding cavity to prevent the injected plastic material from overflowing from the gap in the molding cavity.
[0041] When the upper mold base 3 moves upward, the rotating cylinder 54 moves away from the semi-cylinder 92 on the inclined block 91, and the moving slider 82 is reset under the elastic force of the return spring 83.
[0042] In summary: The molding concave template 2 and molding convex template 4 in this application have an anti-overflow design. When the molding convex template 4 and molding concave template 2 are closed, the rotating cylinder 54 squeezes the semi-cylinder 92 on the inclined block 91, thereby causing the anti-overflow block 9 to move. The anti-overflow block 9 moves and fits with the corresponding anti-overflow frame 62. The molding cavity is between the molding protrusion 41 and the partition frame 21. The anti-overflow block 9 and the anti-overflow frame 62 cover the molding cavity to prevent the injected plastic material from overflowing from the gap in the molding cavity.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A molding die structure for preventing overflow, characterized in that: include A molding die mechanism for molding and manufacturing plastic shell products (7) includes a lower die base (1) and an upper die base (3). A molding concave template (2) is fixed on the lower die base (1) by bolts. An integrally cast partition frame (21) is provided inside the molding concave template (2). A molding convex template (4) is fixed on the upper die base (3) by screws and bolts. A molding protrusion (41) is welded on the molding convex template (4). The anti-overflow assembly includes a fixing frame (61) sleeved on the outside of the forming protrusion (41) and an anti-overflow frame (62) welded to the fixing frame (61); The pressure assembly includes a connecting column (51) fixed to the forming convex template (4) by screws, a fixing plate (52) welded to the bottom end of the connecting column (51), an inclined plate (53) welded to the fixing plate (52) at one end, and a rotating cylinder (54) rotatably connected to the inclined plate (53) at both ends respectively. An anti-overflow sliding assembly includes a moving component and an anti-overflow component. The moving component includes a fixed shaft (81), a moving slider (82) slidably connected to the fixed shaft (81), a rebound spring (83) sleeved on the outside of the fixed shaft (81), and a connecting block (84) fixed to the moving slider (82) by bolts. The anti-overflow component includes an anti-overflow block (9) fixed to the connecting block (84) by screws, an inclined block (91) welded to the anti-overflow block (9), and a semi-cylinder (92) welded to the inclined block (91).
2. The anti-overflow molding die structure according to claim 1, characterized in that: The fixed frame (61) and the anti-overflow frame (62) are frame structures. The cross-section of the anti-overflow frame (62) is a right-angled triangle. The fixed frame (61) and the anti-overflow frame (62) form an installation groove at the center that mates with the forming protrusion (41). The geometry of the installation groove is the same as that of the forming protrusion (41).
3. The anti-overflow molding die structure according to claim 1, characterized in that: The connecting column (51) is a square column structure, and the fixing plate (52) is a cuboid plate structure.
4. The anti-overflow molding die structure according to claim 1, characterized in that: The two ends of the fixed shaft (81) are respectively welded to the forming concave template (2) and the partition frame (21), and the two ends of the rebound spring (83) are respectively connected to the partition frame (21) and the movable slider (82).
5. The anti-overflow molding die structure according to claim 1, characterized in that: The cross-section of the overflow block (9) is a right trapezoid, and the inclined surface of the overflow block (9) is opposite to and parallel to the inclined surface of the overflow frame (62).
6. The anti-overflow molding die structure according to claim 1, characterized in that: The inclined block (91) is a three-dimensional structure of a right triangle, and the outer circular surface of the rotating cylinder (54) is in rolling contact with the outer surface of the semi-cylinder (92).
7. The anti-overflow molding die structure according to claim 1, characterized in that: The molded concave template (2) has an indented cavity inside. The partition frame (21) divides the cavity into a molding cavity and a movable cavity. The plastic shell product (7) is located in the molding cavity. The anti-overflow sliding component is located in the movable cavity. The bottom surface of the anti-overflow block (9) is flush with the top surface of the partition frame (21).
8. The anti-overflow molding die structure according to claim 1, characterized in that: The lower mold base (1) includes a base plate a, a side plate b, a fixed top plate c, a lifting plate e, an ejector pin f, and a guide post d.