Multi-cavity automobile grille injection mold

Abstract

The utility model provides a multi-cavity type automobile grille injection mold, and belongs to the technical field of injection molds. The multi-cavity type automobile grille injection mold comprises an upper top plate, an upper mold plate, a lower mold plate, a vertical plate, an ejector plate and a lower bottom plate, a core cavity is formed in the center of the upper mold plate, a movable core block sliding up and down along the core cavity is arranged in the core cavity, the upper end of the movable core block abuts against a spring, the upper end of the spring abuts against the upper top plate, and an injection needle tube is clamped and embedded in the upper top plate. The movable core block is provided with a center hole allowing the injection needle tube to penetrate through, the lower end face of the movable core block is provided with a plurality of upper transverse runners communicating with the forming die cavities, the upper transverse runners communicate with the lower end of the injection needle tube, a cutting core block is embedded in the cutting groove, and the lower end of the cutting core block is connected with a first ejector rod. The lower end of the first ejector rod penetrates out of the lower die plate and then abuts against the ejector plate. The runner stub bar and the product are separated in the mold, no burr is left on the surface of the product, an additional cutting procedure is not needed, and the production efficiency is improved while the product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a multi-cavity automobile grille injection mold. Background Art

[0002] A multi-cavity injection mold has a main runner and several branch runners. The branch runners are connected to the molding cavity. The molten plastic enters the molding cavity and is cooled and shaped to form an injection molded product. Multiple products are connected as a whole by the runner head. After the product is formed, at least one person needs to cut them one by one to separate the product from the runner head. Cutting requires specific scissors, and in order to improve the cutting effect, the scissors need to be heated. After the product and the runner head are separated, an injection gate mark or burr is often left on the outer surface of the product, which not only affects the overall smoothness of the outer surface of the product and the appearance of the product, but also poses a safety hazard of being stabbed by burrs when the user uses it. The product and the runner head are easily contaminated during the cutting process, which affects the quality of the secondary use of the runner head, and the quality of the product is also reduced to a certain level. In addition, the additional cutting process reduces the production efficiency of the product. For this reason, it is necessary to design an injection mold that automatically separates the product and the runner head. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned problems in the existing technology and propose a multi-cavity automobile grille injection mold, which completes the separation of the runner head and the product in the mold, has a neat cut surface, does not leave burrs on the product surface, does not require additional cutting processes, improves product quality and speeds up production efficiency.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a multi-cavity automobile grille injection mold, comprising an upper top plate, an upper template, a lower template, a vertical plate, a top plate and a lower bottom plate, wherein the upper template and the lower template are provided with a plurality of molding cavities for molding the automobile grille, the upper top plate is fixed to the upper template, and the lower template, the vertical plate and the lower bottom plate are fixed in sequence by bolts, characterized in that the top plate is located between the two vertical plates, a guide column is fixed on the lower bottom plate, and a guide hole for the guide column to slide is provided on the top plate, a core cavity is provided in the center of the upper template, a movable core block sliding up and down along the core cavity is provided in the core cavity, an annular groove is provided on the side of the movable core block, and a baffle protruding and inserted into the annular groove is provided on the inner wall of the core cavity, the upper end of the movable core block is abutted against a spring, the upper end of the spring abuts against the upper top plate, an injection needle is embedded on the upper top plate, and the movable core block is provided with a core cavity. The lower end of the cutting core block is provided with a central hole for the injection molding needle to pass through, and the lower end surface of the movable core block is provided with a plurality of upper transverse flow channels connecting each molding cavity, the upper transverse flow channel is connected with the lower end of the injection molding needle tube, the lower template is provided with a cutting groove, and a cutting core block is embedded in the cutting groove, and the upper end surface of the cutting core block is provided with a lower transverse flow channel which corresponds to the position and quantity of the upper transverse flow channels in a one-to-one manner, and the lower end of the cutting core block is connected with a first ejecting rod, and the lower end of the first ejecting rod rests on the ejecting plate after passing through the lower template, and a unloading groove is provided in the molding cavity of the lower template, and a ejecting block is embedded in the unloading groove, and the lower end of the ejecting block is fixedly connected with a second ejecting rod, and the lower end of the second ejecting rod is suspended after passing through the lower template, and a central through hole is provided in the center of the cutting core block, and a central support column is fixed on the lower bottom plate, and the central support column passes through the ejecting plate and the lower template in sequence, and the upper end of the central support column is embedded in the central through hole.

[0005] Furthermore, the central support column and the injection molding needle tube are coaxially arranged and have the same outer diameter, and when the cutting core block moves upward, the injection molding needle tube can extend into the central through hole.

[0006] Furthermore, the movable core block includes an upper core portion and a lower core portion, and the upper core portion and the lower core portion are fixed by bolts.

[0007] The movable core block is divided into two parts, upper and lower, for easy installation and removal. The core cavity is provided with a baffle embedded in the annular groove, so the movable core block will not fall off the lower template. Under the action of the spring, the lower core rests on the baffle.

[0008] Furthermore, the cross-sections of the upper transverse flow channel and the lower transverse flow channel are both semicircular.

[0009] Furthermore, an injection molding connection port connected to the injection molding needle tube port is opened on the upper top plate.

[0010] Start the injection molding machine and close the lower mold plate with the upper mold plate. At this time, the upper transverse flow channel and the lower transverse flow channel fit together to form a complete transverse flow channel. Inject molten plastic raw materials into the injection needle tube. The plastic raw materials enter the molding cavity along multiple transverse flow channels. After the molding cavity is filled, start the discharge cylinder to drive the ejector plate to move up a short distance. The first ejector rod drives the cutting core block to move up. The cutting core block squeezes the movable core block. The movable core block moves up along the core cavity to compress the spring. At this time, the transverse flow channel is misaligned with the molding cavity, and the flow channel head is cut off from the product. The side of the cutting core block blocks the inlet of the molding cavity. After the product is completely cooled and finalized, the discharge cylinder continues to push the ejector plate up while the mold is opened to eject the product out of the molding model. The flow channel head can also be easily removed.

[0011] Compared with the prior art, this multi-cavity automobile grille injection mold has the following advantages:

[0012] 1. Only one unloading cylinder is needed to complete the gate separation, separate the product from the runner head, and save costs.

[0013] 2. The runner head and the product are separated in the mold, the cut surface is neat, no burrs are left on the product surface, and no additional cutting process is required, which improves product quality and speeds up production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the multi-cavity automobile grille injection mold.

[0015] Figure 2 It is a schematic diagram of the lower mold plate of the multi-cavity automobile grille injection mold.

[0016] Figure 3 It is a structural schematic diagram of the movable core block.

[0017] Figure 4 This is a product picture of the car grille.

[0018] Figure 5 It is a schematic diagram of the structure of the cutting core block.

[0019] In the figure, 1. upper top plate; 2. upper template; 3. lower template; 4. vertical plate; 5. ejector plate; 6. lower bottom plate; 7. automobile grille; 8. molding cavity; 9. guide column; 10. guide hole; 11. core cavity; 12. movable core block; 121. upper core; 122. lower core; 13. annular groove; 14. baffle; 15. spring; 16. injection needle; 17. center hole; 18. upper transverse flow channel; 19. cutting groove; 20. cutting core block; 21. lower transverse flow channel; 22. first ejector rod; 23. ejector block; 24. second ejector rod; 25. center support column; 26. center through hole; 27. injection connection port; 28. flow channel head. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] The multi-cavity automobile grille injection mold comprises an upper top plate 1, an upper mold plate 2, a lower mold plate 3, a vertical plate 4, a top plate 5 and a lower bottom plate 6. The upper mold plate 2 and the lower mold plate 3 are provided with a plurality of molding cavities 8 for molding the automobile grille 7. The upper top plate 1 is fixed to the upper mold plate 2, and the lower mold plate 3, the vertical plate 4 and the lower bottom plate 6 are fixed in sequence by bolts. The top plate 5 is located between the two vertical plates 4, and a guide column 9 is fixed on the lower bottom plate 6. The top plate 5 is provided with a guide hole 10 for the guide column 9 to slide.

[0022] The upper template 2 has a core cavity 11 in the center, and a movable core block 12 is provided in the core cavity 11 to slide up and down along the core cavity 11. An annular groove 13 is provided on the side of the movable core block 12, and the inner wall of the core cavity 11 has a protruding baffle 14 inserted into the annular groove 13. A spring 15 is abutted on the upper end of the movable core block 12, and the upper end of the spring 15 abuts against the upper top plate 1. An injection needle 16 is embedded on the upper top plate 1. The movable core block 12 has a central hole 17 for the injection needle 16 to pass through. A plurality of upper transverse flow channels 18 connecting the various molding cavities 8 are provided on the lower end surface of the movable core block 12, and the upper transverse flow channels 18 are connected to the lower end of the injection needle 16. A cutting groove 19 is provided on the lower template 3, and a cutting core block is embedded in the cutting groove 19. 20. The upper end surface of the cutting core block 20 is provided with a lower transverse flow channel 21 which corresponds to the position and number of the upper transverse flow channel 18. The lower end of the cutting core block 20 is connected with a first ejecting rod 22. The lower end of the first ejecting rod 22 passes through the lower template 3 and abuts against the ejecting plate 5. A discharge trough is provided in the molding cavity 8 of the lower template 3. A ejecting block 23 is embedded in the discharge trough. The lower end of the ejecting block 23 is fixedly connected with a second ejecting rod 24. The lower end of the second ejecting rod 24 passes through the lower template 3 and is suspended. A central through hole 26 is provided in the center of the cutting core block 20. A central support column 25 is fixed on the lower base plate 6. The central support column 25 passes through the ejecting plate 5 and the lower template 3 in sequence. The upper end of the central support column 25 is embedded in the central through hole 26.

[0023] The central support column 25 is coaxially arranged with the injection needle tube 16 and has the same outer diameter. When the cutting core block 20 moves upward, the injection needle tube 16 can extend into the central through hole 26 .

[0024] The movable core block 12 includes an upper core portion 121 and a lower core portion 122, which are fixed by bolts. The movable core block 12 is divided into an upper and a lower part, which is convenient for installation and removal. The core cavity 11 is provided with a baffle 14 embedded in the annular groove 13, so that the movable core block 12 will not be separated from the lower mold plate 3. Under the action of the spring 15, the lower core portion 122 abuts against the baffle 14.

[0025] The cross sections of the upper transverse flow channel 18 and the lower transverse flow channel 21 are both semicircular. The upper transverse flow channel 18 and the lower transverse flow channel 21 are attached to form a complete transverse flow channel with a circular cross section.

[0026] The upper top plate 1 is provided with an injection connection port 27 which is communicated with the port of the injection needle tube 16 , and the injection connection port 27 is used to be connected with a feeding pipeline.

[0027] Workflow: Start the injection molding machine to close the lower mold plate 3 and the upper mold plate 2. At this time, the upper transverse flow channel 18 and the lower transverse flow channel 21 are fitted to form a complete transverse flow channel. The molten plastic material is injected into the injection needle tube 16. The plastic material enters the molding cavity 8 along multiple transverse flow channels. After the molding cavity 8 is filled, the unloading cylinder is started to drive the ejector plate 5 to move up a short distance. The first ejector rod 22 drives the cutting core block 20 to move up. The cutting core block 20 squeezes the movable core block 12. The movable core block 12 moves up along the core cavity 11 to compress the spring 15. At this time, the transverse flow channel is misaligned with the molding cavity 8, and the flow channel head 28 is cut off from the product. The side of the cutting core block 20 blocks the inlet of the molding cavity 8. After the product is completely cooled and shaped, the unloading cylinder continues to push the ejector plate 5 upward while the mold is opened to eject the product out of the molding model. The flow channel head 28 can also be easily taken out.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A multi-cavity automobile grille injection mold, comprising an upper top plate, an upper mold plate, a lower mold plate, a vertical plate, a top plate and a lower bottom plate, wherein the upper mold plate and the lower mold plate are provided with a plurality of molding cavities for molding the automobile grille, the upper top plate is fixed to the upper mold plate, and the lower mold plate, the vertical plate and the lower bottom plate are fixed in sequence by bolts, characterized in that: The ejector plate is located between the two vertical plates, a guide column is fixed on the lower bottom plate, a guide hole is opened on the ejector plate for the guide column to slide, a core cavity is opened in the center of the upper template, a movable core block is provided in the core cavity which slides up and down along the core cavity, an annular groove is opened on the side of the movable core block, the inner wall of the core cavity has a protruding baffle inserted into the annular groove, a spring is abutted on the upper end of the movable core block, the upper end of the spring abuts against the upper ejector plate, an injection needle is embedded on the upper ejector plate, a central hole is opened on the movable core block for the injection needle to pass through, a plurality of upper transverse flow channels connecting various molding cavities are opened on the lower end surface of the movable core block, the upper transverse flow channels are connected to the lower end of the injection needle, and the lower template A cutting groove is opened on the top, and a cutting core block is embedded in the cutting groove. A lower transverse flow channel corresponding to the position and number of the upper transverse flow channel is opened on the upper end surface of the cutting core block. A first ejecting rod is connected to the lower end of the cutting core block, and the lower end of the first ejecting rod abuts against the ejecting plate after passing through the lower template. A unloading groove is opened in the molding cavity of the lower template, and a ejecting block is embedded in the unloading groove. The lower end of the ejecting block is fixedly connected to a second ejecting rod, and the lower end of the second ejecting rod is suspended after passing through the lower template. A central through hole is opened in the center of the cutting core block, and a central support column is fixed on the lower bottom plate. The central support column passes through the ejecting plate and the lower template in sequence, and the upper end of the central support column is embedded in the central through hole.

2. The multi-cavity automobile grille injection mold according to claim 1, characterized in that: The central support column and the injection needle tube are coaxially arranged and have the same outer diameter. When the cutting core block moves upward, the injection needle tube can extend into the central through hole.

3. The multi-cavity automobile grille injection mold according to claim 2, characterized in that: The movable core block comprises an upper core part and a lower core part, and the upper core part and the lower core part are fixed by bolts.

4. The multi-cavity automobile grille injection mold according to claim 3, characterized in that: The cross sections of the upper transverse flow channel and the lower transverse flow channel are both semicircular.

5. The multi-cavity automobile grille injection mold according to claim 4, characterized in that: An injection molding connection port which is communicated with the injection molding needle tube port is opened on the upper top plate.

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