Injection mold for large-area plastic table panel

Abstract

The utility model provides an injection mold for a large-area plastic table panel, and belongs to the technical field of molds. The die comprises a lower die plate, the top of the lower die plate is provided with a combined detachable insert structure, the combined detachable insert structure comprises a middle insert with a rectangular section, and the front side, the rear side, the left side and the right side of the middle insert are provided with front and rear side inserts and left and right side inserts respectively. The combined detachable insert structure composed of the middle insert, the front side insert, the rear side insert, the left side insert and the right side insert is adopted, the maintenance and replacement cost when damage occurs can be reduced, the cooling runner structure in the insert can be connected with the cooling runner on the lower die plate, and therefore the cooling effect can be improved; the front-back side core pulling mechanism and the left-right side core pulling mechanism can achieve automatic core pulling.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection mold for a large-area plastic desktop panel. Background Art

[0002] Large-area plastic desktop panels are generally produced by injection molding. In the prior art, the cooling structure of the desktop panel mold is set on the lower template. Since the lower template is provided with a desktop panel forming insert and the thickness of the forming insert is relatively large, the cooling structure is poor when the cooling structure is set on the lower template.

[0003] For example, a Chinese patent discloses an injection molding mold for a combined plastic table top panel [application number: 201920273136.8], which includes a fixed mold plate, a movable mold plate, a mold core and a mold core fixing plate. The movable mold plate is opened and closed relative to the fixed mold plate. The fixed mold plate is provided with a mold core fixing plate. A plurality of mold cores are detachably provided on the mold core fixing plate. The plurality of mold cores are sequentially assembled in a horizontal plane to form a convex mold structure that matches the bottom surface contour of the desktop panel. The bottom surface of the fixed mold plate is concavely provided with a concave mold structure that matches the top surface contour of the desktop panel. The concave mold structure and the convex mold structure form an injection molding cavity, and the convex mold structure is a split structure. Utility Model Content

[0004] The purpose of the utility model is to provide a large-area plastic desktop panel injection mold in order to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A large-area plastic desktop panel injection mold includes a lower template, and a combined detachable insert structure is provided on the top of the lower template. The combined detachable insert structure includes a middle insert with a rectangular cross-section, and the front and rear sides and left and right sides of the middle insert are respectively provided with front and rear side inserts and left and right side inserts. The front and rear side inserts on the front and rear sides of the middle insert and the left and right side inserts on the left and right sides of the middle insert are combined to form a rectangular ring. The front and rear sides of the middle insert are also respectively provided with a front and rear side core pulling mechanism that is abutted against the front and rear side inserts. The left and right sides of the middle insert are also respectively provided with a left and right side core pulling mechanism that is abutted against the left and right side inserts. The two front and rear side core pulling mechanisms and the two left and right side core pulling mechanisms are combined to form a rectangular ring. The bottom of the combined detachable insert structure is also provided with an insert inner cooling flow channel structure.

[0007] In the above-mentioned large-area plastic desktop panel injection mold, the cooling channel structure in the insert includes a number of No. 1 cooling holes distributed in a rectangular array and recessed inwardly at the bottom of the middle insert. The No. 1 cooling holes are arranged vertically and each No. 1 cooling hole is provided with at least one No. 1 connecting hole connecting the adjacent No. 1 cooling holes. The lower mold plate is provided with a cooling channel, and the bottom of the No. 1 cooling hole is connected to the cooling channel.

[0008] In the above-mentioned large-area plastic desktop panel injection mold, the cooling channel structure in the insert also includes a number of No. 2 cooling holes distributed in a straight line and recessed inwardly at the bottom of the front and rear side inserts and the left and right side inserts. The No. 2 cooling holes are arranged vertically and a No. 2 connecting hole is provided between two adjacent No. 2 cooling holes. The bottom of the No. 2 cooling hole is also connected to the cooling channel.

[0009] In the above-mentioned large-area plastic desktop panel injection mold, the front and rear side core pulling mechanism includes front and rear side core pulling sliders slidably connected to the lower template through a limiting structure, and the inner ends of the front and rear side core pulling sliders have front and rear side core blocks that are against the front and rear side inserts.

[0010] The above-mentioned large-area plastic desktop panel injection mold also includes three inclined No. 1 drive rods, which are inserted into the front and rear core-pulling sliders and slide with the front and rear core-pulling sliders. The top end of the No. 1 drive rod is fixed on the upper template.

[0011] In the above-mentioned large-area plastic desktop panel injection mold, the left and right side core pulling mechanisms include left and right side core pulling sliders slidably connected to the lower template through a limiting structure, and the inner ends of the left and right side core pulling sliders have left and right side core blocks that are against the left and right side inserts.

[0012] The above-mentioned large-area plastic desktop panel injection mold also includes two inclined No. 2 drive rods, which are inserted into the left and right core-pulling sliders and slide with the left and right core-pulling sliders. The top end of the No. 2 drive rod is fixed on the upper template.

[0013] In the above-mentioned large-area plastic desktop panel injection mold, the limiting structure includes two T-shaped limiting blocks fixed to the lower template by a number of screws, and the bottoms of the front and rear core-pulling sliders and the left and right core-pulling sliders are provided with T-shaped limiting grooves that slide with the T-shaped limiting blocks.

[0014] In the above-mentioned large-area plastic desktop panel injection mold, a bottom plate is also provided on the lower side of the lower template, and a number of positioning structures corresponding to the front and rear core-pulling sliders and the left and right core-pulling sliders are provided on the bottom plate. The positioning structure includes a positioning rod fixed on the bottom plate, and the top end of the positioning rod vertically passes through the lower template and is inserted into the positioning grooves on the front and rear core-pulling sliders and the left and right core-pulling sliders.

[0015] In the above-mentioned large-area plastic desktop injection mold, a top plate is provided on the bottom plate, and an inclined ejector rod is rotatably connected to the top plate, and the top ends of the inclined ejector rods are inserted into the left and right side inserts, and the inclined ejector rods are inclined away from the center of the lower template;

[0016] The middle insert, the front and rear side inserts and the left and right side inserts are also provided with reinforcing rib forming grooves which are recessed inwards.

[0017] Compared with the existing technology, the advantages of this utility model are:

[0018] 1. The use of a combined detachable insert structure consisting of a middle insert, front and rear side inserts, and left and right side inserts can reduce the cost of repair and replacement in the event of damage. The cooling channel structure inside the insert can be connected to the cooling channel on the lower template to improve the cooling effect. When the mold is opened, the front and rear side core pulling mechanisms and the left and right side core pulling mechanisms can realize automatic core pulling.

[0019] 2. After the coolant is introduced into the cooling channel on the lower template, the coolant can enter the No. 1 cooling hole and the No. 2 cooling hole, thereby shortening the distance between the coolant and the molding cavity and improving the cooling effect. The No. 1 connecting hole can connect two adjacent No. 1 cooling holes, and the No. 2 connecting hole can connect two adjacent No. 2 cooling holes.

[0020] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the local structure of the lower template;

[0023] Figure 3 It is a partial structural diagram of the utility model;

[0024] Figure 4 It is a schematic diagram of the cooling channel structure in the insert. DETAILED DESCRIPTION

[0025] like Figures 1-4As shown, a large-area plastic desktop panel injection mold includes a lower template 1, and a combined detachable insert structure 2 is provided on the top of the lower template 1. The combined detachable insert structure 2 includes a middle insert 3 with a rectangular cross-section, and the front and rear sides and left and right sides of the middle insert 3 are respectively provided with front and rear side inserts 4 and left and right side inserts 5. The front and rear side inserts 4 on the front and rear sides of the middle insert 3 and the left and right side inserts 5 on the left and right sides of the middle insert 3 are surrounded by a rectangular ring. The front and rear sides of the middle insert 3 are also respectively provided with a front and rear side core pulling mechanism 6 that is abutted against the front and rear side inserts 4. The left and right sides of the middle insert 3 are also respectively provided with a left and right side core pulling mechanism 7 that is abutted against the left and right side inserts 5. The two front and rear side core pulling mechanisms 6 and the two left and right side core pulling mechanisms 7 are surrounded by a rectangular ring. The bottom of the combined detachable insert structure 2 is also provided with an insert inner cooling flow channel structure 8.

[0026] In the present invention, a combined detachable insert structure 2 consisting of a middle insert 3, front and rear side inserts 4 and left and right side inserts 5 is used to reduce the cost of repair and replacement when damage occurs. The cooling channel structure 8 in the insert can be connected to the cooling channel on the lower template to improve the cooling effect. When the mold is opened, the front and rear side core pulling mechanisms 6 and the left and right side core pulling mechanisms 7 can realize automatic core pulling.

[0027] Specifically, the cooling channel structure 8 in the insert includes a number of No. 1 cooling holes 9 distributed in a rectangular array and recessed inwardly at the bottom of the middle insert 3. The No. 1 cooling holes 9 are vertically arranged and each No. 1 cooling hole 9 is provided with at least one No. 1 connecting hole 10 connecting the adjacent No. 1 cooling holes 9. A cooling channel 11 is provided on the lower template 1, and the bottom of the No. 1 cooling hole 9 is connected to the cooling channel 11. The cooling channel structure 8 in the insert also includes a number of No. 2 cooling holes 12 distributed in a straight line and recessed inwardly at the bottom of the front and rear side inserts 4 and the left and right side inserts 5. The No. 2 cooling holes 12 are vertically arranged and a No. 2 connecting hole 13 is provided between two adjacent No. 2 cooling holes 12, and the bottom of the No. 2 cooling hole 12 is also connected to the cooling channel 11. After the coolant is introduced into the cooling channel on the lower template, the coolant can enter the No. 1 cooling hole 9 and the No. 2 cooling hole, thereby shortening the distance between the coolant and the molding cavity and improving the cooling effect. The No. 1 connecting hole can connect two adjacent No. 1 cooling holes, and the No. 2 connecting hole can connect two adjacent No. 2 cooling holes.

[0028] Specifically, the front and rear core-pulling mechanisms 6 include front and rear core-pulling sliders 14 that are slidably connected to the lower mold plate 1 through a limiting structure. The inner ends of the front and rear core-pulling sliders 14 have front and rear core blocks 15 that abut against the front and rear side inserts 4. The mechanisms also include three tilted No. 1 drive rods 16 that are inserted into the front and rear core-pulling sliders 14 and slidably cooperate with the front and rear core-pulling sliders 14. The top ends of the No. 1 drive rods 16 are fixed to the upper mold plate. When the mold is opened, the upward movement of the upper mold plate can drive the No. 1 drive rod to move upward, and the upward movement of the No. 1 drive rod can drive the front and rear core-pulling sliders 14 to move away from the molding cavity, thereby realizing automatic core pulling of the front and rear core blocks. The limiting structure can limit the front and rear core-pulling sliders.

[0029] Specifically, the left and right core-pulling mechanisms 7 include left and right core-pulling sliders 17 that are slidably connected to the lower mold plate 1 through a limiting structure. The inner ends of the left and right core-pulling sliders 17 have left and right core blocks 18 that abut against the left and right inserts 5. The mechanisms also include two inclined No. 2 drive rods 19 that are inserted into the left and right core-pulling sliders 17 and slidably cooperate with the left and right core-pulling sliders 17. The top ends of the No. 2 drive rods 19 are fixed to the upper mold plate. When the mold is opened, the upward movement of the upper mold plate can drive the No. 2 drive rods to move upward. The upward movement of the No. 2 drive rods can drive the left and right core-pulling sliders to move away from the molding cavity, thereby realizing automatic core pulling of the left and right core blocks. The limiting structure can limit the left and right core-pulling sliders.

[0030] Specifically, the limiting structure includes two T-shaped limiting blocks 20 fixed to the lower template 1 by a number of screws. The bottoms of the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17 are provided with T-shaped limiting grooves that slidably cooperate with the T-shaped limiting blocks 20. The T-shaped limiting grooves at the bottoms of the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17 cooperate with the T-shaped limiting blocks 20 to limit the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17.

[0031] Preferably, a bottom plate 21 is further provided on the lower side of the lower template 1. The bottom plate 21 is provided with a plurality of positioning structures corresponding to the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17. The positioning structures include positioning rods 22 fixed to the bottom plate 21. The top ends of the positioning rods 22 vertically penetrate the lower template 1 and are inserted into positioning grooves 23 on the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17. The positioning rods 22 cooperate with the positioning grooves 23 to position the maximum outward movement distance of the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17.

[0032] Specifically, a top plate 24 is provided on the bottom plate 21, and an inclined push rod 25 is rotatably connected to the top plate 24. The top ends of the inclined push rods 25 are inserted into the left and right side inserts 5, and the inclined push rods 25 are inclined away from the center of the lower template 1; when the top plate moves upward, it can drive the inclined push rods to move obliquely upward, thereby applying an oblique upward thrust to the product.

[0033] Preferably, the middle panel 3, the front and rear side panels 4 and the left and right side panels 5 are further recessed with rib forming grooves 26. The rib forming grooves can form ribs at the bottom of the desktop panel during injection molding to increase the strength of the desktop panel.

[0034] The working principle of the utility model is as follows: the use of a combined detachable insert structure 2 composed of a middle insert 3, front and rear side inserts 4 and left and right side inserts 5 can reduce the cost of repair and replacement when damaged; the cooling channel structure 8 in the insert can be connected to the cooling channel on the lower mold plate to improve the cooling effect; when the mold is opened, the front and rear side core pulling mechanisms 6 and the left and right side core pulling mechanisms 7 can realize automatic core pulling;

[0035] After the coolant is introduced into the cooling channel on the lower mold plate, the coolant can enter the No. 1 cooling hole 9 and the No. 2 cooling hole, thereby shortening the distance between the coolant and the molding cavity and improving the cooling effect. The No. 1 connecting hole can connect two adjacent No. 1 cooling holes, and the No. 2 connecting hole can connect two adjacent No. 2 cooling holes.

[0036] When the mold is opened, the upward movement of the upper template can drive the No. 1 driving rod to move upward, and the upward movement of the No. 1 driving rod can drive the front and rear core-pulling sliders 14 to move away from the molding cavity, thereby realizing automatic core pulling of the front and rear core blocks, and the limiting structure can limit the front and rear core-pulling sliders. When the mold is opened, the upward movement of the upper template can drive the No. 2 driving rod to move upward, and the upward movement of the No. 2 driving rod can drive the left and right core-pulling sliders to move away from the molding cavity, thereby realizing automatic core pulling of the left and right core blocks, and the limiting structure can limit the left and right core-pulling sliders. The T-shaped limiting grooves at the bottom of the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17 cooperate with the T-shaped limiting blocks 20 to limit the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17;

[0037] The positioning rod 22 cooperates with the positioning groove 23 to position the maximum distance that the front and rear core-pulling sliders 14 and the left and right core-pulling sliders 17 can move outward. When the top plate moves upward, it can drive the inclined ejector rod to move obliquely upward, thereby applying an oblique upward thrust to the product. The reinforcement rib forming groove can form reinforcement ribs at the bottom of the desktop panel during injection molding, thereby increasing the strength of the desktop panel.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A large-area plastic desktop panel injection mold, comprising a lower mold plate (1), characterized in that: The top of the lower template (1) is provided with a combined detachable insert structure (2), and the combined detachable insert structure (2) includes a middle insert (3) with a rectangular cross-section, and the front and rear sides and left and right sides of the middle insert (3) are respectively provided with front and rear side inserts (4) and left and right side inserts (5), and the front and rear side inserts (4) on the front and rear sides of the middle insert (3) and the left and right side inserts (5) on the left and right sides of the middle insert (3) are surrounded by a rectangular ring, and the front and rear sides of the middle insert (3) are also provided with a front and rear side core pulling mechanism (6) that is against the front and rear side inserts (4), and the left and right sides of the middle insert (3) are also provided with a left and right side core pulling mechanism (7) that is against the left and right side inserts (5), and the two front and rear side core pulling mechanisms (6) and the two left and right side core pulling mechanisms (7) are surrounded by a rectangular ring, and the bottom of the combined detachable insert structure (2) is also provided with an insert inner cooling flow channel structure (8).

2. The large-area plastic desktop panel injection mold according to claim 1, characterized in that: The cooling channel structure (8) in the insert includes a plurality of No. 1 cooling holes (9) distributed in a rectangular array and recessed inwardly at the bottom of the middle insert (3). The No. 1 cooling holes (9) are vertically arranged and each No. 1 cooling hole (9) is provided with at least one No. 1 connecting hole (10) connecting adjacent No. 1 cooling holes (9). A cooling channel (11) is provided on the lower mold plate (1), and the bottom of the No. 1 cooling hole (9) is connected to the cooling channel (11).

3. The large-area plastic desktop panel injection mold according to claim 2, characterized in that: The insert inner cooling channel structure (8) further includes a plurality of No. 2 cooling holes (12) which are linearly distributed and inwardly recessed and arranged at the bottom of the front and rear side inserts (4) and the left and right side inserts (5). The No. 2 cooling holes (12) are arranged vertically and a No. 2 connecting hole (13) is arranged between two adjacent No. 2 cooling holes (12). The bottom of the No. 2 cooling hole (12) is also connected to the cooling channel (11).

4. The large-area plastic desktop panel injection mold according to claim 1, characterized in that: The front and rear side core pulling mechanisms (6) include front and rear side core pulling sliders (14) slidably connected to the lower template (1) through a limiting structure, and the inner ends of the front and rear side core pulling sliders (14) have front and rear side core blocks (15) that abut against the front and rear side inserts (4).

5. The large-area plastic desktop panel injection mold according to claim 4, characterized in that: It also includes three inclined No. 1 drive rods (16), which are inserted into the front and rear core-pulling sliders (14) and slidably cooperate with the front and rear core-pulling sliders (14), and the top end of the No. 1 drive rod (16) is fixed on the upper template.

6. The large-area plastic desktop panel injection mold according to claim 5, characterized in that: The left and right core pulling mechanisms (7) include left and right core pulling sliders (17) slidably connected to the lower template (1) through a limiting structure, and the inner ends of the left and right core pulling sliders (17) have left and right core blocks (18) that abut against the left and right inserts (5).

7. The large-area plastic desktop panel injection mold according to claim 6, characterized in that: It also includes two inclined No. 2 drive rods (19), which are inserted into the left and right core-pulling sliders (17) and slidably matched with the left and right core-pulling sliders (17), and the top end of the No. 2 drive rod (19) is fixed on the upper template.

8. The large-area plastic desktop panel injection mold according to claim 7, characterized in that: The limiting structure includes two T-shaped limiting blocks (20) fixed on the lower template (1) by a plurality of screws, and the bottoms of the front and rear core-pulling sliders (14) and the left and right core-pulling sliders (17) are provided with T-shaped limiting grooves that slide with the T-shaped limiting blocks (20).

9. The large-area plastic desktop panel injection mold according to claim 7, characterized in that: The lower side of the lower template (1) is also provided with a bottom plate (21), and the bottom plate (21) is provided with a plurality of positioning structures corresponding to the front and rear core-pulling sliders (14) and the left and right core-pulling sliders (17). The positioning structure includes a positioning rod (22) fixed on the bottom plate (21), and the top end of the positioning rod (22) vertically passes through the lower template (1) and is inserted into the positioning groove (23) on the front and rear core-pulling sliders (14) and the left and right core-pulling sliders (17).

10. The large-area plastic desktop panel injection mold according to claim 9, characterized in that: A top plate (24) is provided on the bottom plate (21), and an inclined push rod (25) is rotatably connected to the top plate (24), and the top ends of the inclined push rods (25) are inserted into the left and right side inserts (5), and the inclined push rods (25) are inclined away from the center of the lower template (1); The middle insert (3), the front and rear side inserts (4) and the left and right side inserts (5) are also provided with inwardly recessed reinforcing rib forming grooves (26).

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