Plastic workpiece injection mold

Abstract

The present invention discloses a plastic workpiece injection mold, which includes a fixed plate on a fixed mold, a fixed mold flow channel plate, a fixed mold plate, a main balanced flow divider plate, a secondary heat balanced flow divider plate and a plurality of hot nozzles, a main nozzle for injecting molten plastic is provided at the center of the fixed plate on the fixed mold, a plurality of main branch flow channels are provided in the main balanced flow divider plate, a main glue inlet is provided at the top center of the main balanced flow divider plate, a plurality of main glue outlets are provided at the bottom of the main balanced flow divider plate, a plurality of secondary branch flow channels are provided in the secondary heat balanced flow divider plate, a secondary glue inlet is provided at the top of the secondary heat balanced flow divider plate, a plurality of secondary glue outlets are provided at the bottom of the secondary heat balanced flow divider plate, the hot nozzles correspond to the secondary glue outlets one by one, and the inlet of the hot nozzles is connected to the secondary glue outlets, a plurality of mold cores are embedded in the fixed mold plate, and the outlet of the hot nozzles is connected to the mold cavity of the mold core. The present invention can make the glue flow in each flow channel uniform, thereby improving the processing quality.

Description

Technical Field

[0001] The invention relates to an injection mold, in particular to a plastic workpiece injection mold. Background Art

[0002] An injection mold is a device used to process molten plastic into a workpiece of a preset shape. The existing injection mold includes an upper fixed plate, a runner plate and a fixed mold plate, which are arranged in sequence from top to bottom. The upper fixed plate is used to inject molten plastic material, the runner plate is provided with a runner, and the fixed mold plate has a mold core cavity for molding. In order to achieve batch injection molding, a plurality of runners are generally arranged in the runner plate. However, due to the difficulty of processing, the number of branch runners that can be processed in the runner plate is limited. At the same time, the existing technology generally adopts a structure in which a plurality of runners are branched from one glue inlet at the same time. Since the lengths of the runners are different, this branching structure will lead to uneven glue flow or glue speed in each runner, which will cause inconsistent processing quality of the workpiece and make it difficult to meet production requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a plastic workpiece injection mold that can make the plastic flow in each flow channel uniform and thus improve the processing quality in view of the shortcomings of the existing technology.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0005] A plastic workpiece injection mold, comprising a fixed plate on a fixed mold, a fixed mold runner plate, a fixed mold plate, a main balanced manifold plate, a secondary heat balanced manifold plate and a plurality of hot nozzles, wherein the fixed plate on the fixed mold, the fixed mold runner plate and the fixed mold plate are sequentially fitted from top to bottom, the main balanced manifold plate and the secondary heat balanced manifold plate are both embedded in the fixed mold runner plate, the main balanced manifold plate is arranged on the top of the secondary heat balanced manifold plate and the two are stacked, a main nozzle for injecting molten plastic is provided at the center of the fixed plate on the fixed mold, a plurality of main branch runners are provided in the main balanced manifold plate, a main glue inlet is provided at the top center of the main balanced manifold plate, the main glue inlet is communicated with the main nozzle, a plurality of main glue outlets are provided at the bottom of the main balanced manifold plate, the inlets of the plurality of main branch runners are all communicated with the main glue inlet, The main branch flow channel corresponds to the main glue outlet one-to-one, and the outlet of the main branch flow channel is interconnected with the main glue outlet, a plurality of secondary branch flow channels are provided in the secondary heat balance diverter plate, a secondary glue inlet is provided at the top of the secondary heat balance diverter plate, the secondary glue inlet corresponds to the main glue outlet one-to-one and the two are interconnected, a plurality of secondary glue outlets are provided at the bottom of the secondary heat balance diverter plate, the inlets of a plurality of secondary branch flow channels are all connected to the secondary glue inlet, the secondary branch flow channels correspond to the secondary glue outlet one-to-one, and the outlet of the secondary branch flow channels is interconnected with the secondary glue outlet, the hot nozzle corresponds to the secondary glue outlet one-to-one, and the inlet of the hot nozzle is interconnected with the secondary glue outlet, a plurality of mold cores are embedded in the fixed mold plate, and the outlet of the hot nozzle is connected to the mold cavity of the mold core.

[0006] Preferably, the main nozzle extends downward and is inserted into the main balancing diverter plate, and the connection between the main nozzle and the main balancing diverter plate is sealed.

[0007] Preferably, a plurality of upper support blocks are embedded in the bottom of the fixed plate on the fixed mold and the two are fixedly connected, and a plurality of lower support blocks are fixed on the top of the main balancing diverter plate, the upper support blocks are aligned one by one with the lower support blocks, and the upper support blocks and the lower support blocks abut against each other, and a first gap is formed between the fixed plate on the fixed mold and the main balancing diverter plate by the supporting effect of the upper support blocks and the lower support blocks.

[0008] Preferably, a first stop pin is provided in the first gap, the upper end of the first stop pin is inserted in the fixed plate on the fixed mold, and the lower end of the first stop pin is inserted in the main balancing diverter plate.

[0009] Preferably, a main fixing screw is inserted into the main balancing diverter plate, and the main balancing diverter plate is fixedly connected to the fixed mold upper fixing plate by means of the main fixing screw.

[0010] Preferably, a plurality of hollow support rings are provided on the top of the secondary heat balance diverter plate, the support rings are clamped between the main balance diverter plate and the secondary heat balance diverter plate, and the support rings are connected between the main glue outlet and the secondary glue inlet.

[0011] Preferably, the cross-section of the support ring is "T"-shaped, the lower end of the support ring is inserted into the secondary thermal balance diverter plate, and the upper and lower ends of the support ring are respectively sealed with the main balance diverter plate and the secondary thermal balance diverter plate, and the second gap is formed between the main balance diverter plate and the secondary thermal balance diverter plate by the supporting effect of the support ring.

[0012] Preferably, a second stop pin is provided in the second gap, the upper end of the second stop pin is inserted in the main balance manifold plate, and the lower end of the second stop pin is inserted in the secondary heat balance manifold plate.

[0013] Preferably, a secondary fixing screw is inserted into the secondary heat balance manifold plate, and the secondary heat balance manifold plate is fixedly connected to the fixed mold runner plate by means of the secondary fixing screw.

[0014] Preferably, a guide column is included, and the guide column passes through the fixed mold upper fixing plate, the fixed mold runner plate and the fixed mold plate in sequence from top to bottom.

[0015] In the plastic workpiece injection mold disclosed in the present invention, the mold shell structure of the injection mold is formed under the upper and lower stacking action of the fixed plate on the fixed mold, the fixed mold runner plate and the fixed mold plate. On this basis, the present invention arranges the main balance diverter plate and the secondary heat balance diverter plate stacked up and down on the inner side of the fixed mold runner plate, and utilizes the multiple main branch flow channels in the main balance diverter plate to achieve primary diversion, and then utilizes the multiple secondary branch flow channels opened in the secondary heat balance diverter plate to achieve secondary diversion. After the above two levels of diversion, the molten plastic is evenly introduced into the mold cavity of the mold core. Compared with the prior art, the present invention can make the glue flow in each flow channel uniform, greatly improve the processing quality and yield rate, and better meet the production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of an injection mold;

[0017] Figure 2 This is an exploded view of the injection mold;

[0018] Figure 3 A schematic diagram of the structure after the main balance manifold, the secondary heat balance manifold and the fixed mold plate are stacked;

[0019] Figure 4 A top view of the main balancing manifold;

[0020] Figure 5 It is a top view of the secondary heat balance manifold;

[0021] Figure 6 It is a top view of the fixed template;

[0022] Figure 7 is a side sectional view of an injection mold;

[0023] Figure 8 for Figure 7 A magnified view of part A;

[0024] Fig. 9 for Figure 8 Magnified view of part B. DETAILED DESCRIPTION

[0025] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0026] Embodiment 1

[0027] This embodiment provides a plastic workpiece injection mold, combined with Figures 1 to 7As shown, it includes a fixed mold upper fixed plate 1, a fixed mold runner plate 2, a fixed mold plate 3, a main balance diverter plate 4, a secondary heat balance diverter plate 5 and a plurality of hot nozzles 6. The fixed mold upper fixed plate 1, the fixed mold runner plate 2 and the fixed mold plate 3 are sequentially attached from top to bottom. The main balance diverter plate 4 and the secondary heat balance diverter plate 5 are both embedded in the fixed mold runner plate 2. The main balance diverter plate 4 is arranged on the top of the secondary heat balance diverter plate 5 and the two are stacked. The fixed mold upper fixed plate 1 A main injection nozzle 100 for injecting molten plastic is provided at the center, a plurality of main branch flow channels 400 are provided in the main balancing manifold plate 4, a main glue inlet 401 is provided at the top center of the main balancing manifold plate 4, the main glue inlet 401 is communicated with the main injection nozzle 100, a plurality of main glue outlets 402 are provided at the bottom of the main balancing manifold plate 4, the entrances of the plurality of main branch flow channels 400 are all communicated with the main glue inlet 401, the main branch flow channels 400 are communicated with the main glue outlet 402, 02 one-to-one correspondence, and the outlet of the main branch flow channel 400 is interconnected with the main glue outlet 402, a plurality of secondary branch flow channels 500 are opened in the secondary heat balance diverter plate 5, a secondary glue inlet 501 is provided on the top of the secondary heat balance diverter plate 5, the secondary glue inlet 501 corresponds one-to-one with the main glue outlet 402 and the two are interconnected, a plurality of secondary glue outlets 502 are opened at the bottom of the secondary heat balance diverter plate 5, and the inlets of the plurality of secondary branch flow channels 500 are all It is connected to the secondary glue inlet 501, the secondary branch flow channel 500 corresponds to the secondary glue outlet 502 one by one, and the outlet of the secondary branch flow channel 500 is connected to the secondary glue outlet 502, the hot nozzle 6 corresponds to the secondary glue outlet 502 one by one, and the inlet of the hot nozzle 6 is connected to the secondary glue outlet 502, and a plurality of mold cores 300 are embedded in the fixed mold plate 3, and the outlet of the hot nozzle 6 is connected to the mold cavity 301 of the mold core 300.

[0028] In the above structure, the mold shell structure of the injection mold is formed under the upper and lower stacking action of the fixed plate 1 on the fixed mold, the fixed mold runner plate 2 and the fixed mold plate 3. On this basis, the present invention arranges the main balance diverter plate 4 and the secondary thermal balance diverter plate 5 stacked up and down on the inner side of the fixed mold runner plate 2, and utilizes the multiple main branch flow channels 400 in the main balance diverter plate 4 to achieve primary diversion, and then utilizes the multiple secondary branch flow channels 500 opened in the secondary thermal balance diverter plate 5 to achieve secondary diversion. After the above two levels of diversion, the molten plastic is evenly introduced into the mold cavity 301 of the mold core 300. Compared with the prior art, the present invention can make the glue flow in each flow channel more uniform, greatly improve the processing quality and yield rate, and better meet the production requirements.

[0029] It is particularly emphasized that the present embodiment preferably provides a secondary heat balance manifold 5. Under the action of the graded heat balance manifold, the phenomenon of uncontrolled physical error precision caused by thermal expansion of metal can be greatly reduced, which can not only improve the overall performance of the mold, but also ensure the mold precision.

[0030] In addition, based on the structural design of multiple hot nozzles 6, this embodiment does not need to independently set up a heater, a thermocouple and a temperature control box for each nozzle, thereby simplifying the internal structure of the mold and facilitating structural design and production manufacturing.

[0031] In order to make the main nozzle 100 well matched with the main balancing diverter plate 4, in this embodiment, the main nozzle 100 extends downward and is inserted into the main balancing diverter plate 4, and the connection between the main nozzle 100 and the main balancing diverter plate 4 is sealed.

[0032] As a preferred embodiment, a plurality of upper support blocks 101 are embedded at the bottom of the fixed mold upper fixed plate 1 and the two are fixedly connected, a plurality of lower support blocks 403 are fixed at the top of the main balancing diverter plate 4, the upper support blocks 101 are aligned one by one with the lower support blocks 403, and the upper support blocks 101 and the lower support blocks 403 are in contact with each other, and a first gap 102 is formed between the fixed mold upper fixed plate 1 and the main balancing diverter plate 4 by the supporting effect of the upper support blocks 101 and the lower support blocks 403. Among them, one function of the upper support blocks is to make the fixed mold upper fixed plate 1 and the main balancing diverter plate 4 more closely matched with each other, and to facilitate the laying of cables from the first gap 102.

[0033] In order to further improve the assembly accuracy, in this embodiment, a first stop pin 103 is provided in the first gap 102, the upper end of the first stop pin 103 is inserted in the fixed mold upper fixed plate 1, and the lower end of the first stop pin 103 is inserted in the main balancing diverter plate 4.

[0034] In this embodiment, a main fixing screw 404 is inserted into the main balancing diverter plate 4 , and the main balancing diverter plate 4 is fixedly connected to the fixed mold upper fixing plate 1 by the main fixing screw 404 .

[0035] In order to seal the flow channel connection between the main balancing diverter plate 4 and the secondary thermal balancing diverter plate 5, in this embodiment, a plurality of hollow support rings 503 are provided on the top of the secondary thermal balancing diverter plate 5, and the support rings 503 are clamped between the main balancing diverter plate 4 and the secondary thermal balancing diverter plate 5, and the support rings 503 are connected between the main glue outlet 402 and the secondary glue inlet 501.

[0036] As a preferred embodiment, the cross-section of the support ring 503 is "T"-shaped, the lower end of the support ring 503 is inserted into the secondary thermal balance diverter plate 5, and the upper and lower ends of the support ring 503 are respectively sealed with the main balance diverter plate 4 and the secondary thermal balance diverter plate 5, and the second gap 504 is formed between the main balance diverter plate 4 and the secondary thermal balance diverter plate 5 by the supporting effect of the support ring 503.

[0037] In order to improve the connection reliability between the main balancing diverter plate 4 and the secondary thermal balancing diverter plate 5, in this embodiment, a second stop pin 505 is provided in the second gap 504, the upper end of the second stop pin 505 is inserted in the main balancing diverter plate 4, and the lower end of the second stop pin 505 is inserted in the secondary thermal balancing diverter plate 5.

[0038] As a preferred embodiment, a secondary fixing screw 506 is inserted into the secondary heat balance manifold plate 5 , and the secondary heat balance manifold plate 5 is fixedly connected to the fixed mold runner plate 2 by means of the secondary fixing screw 506 .

[0039] In order to play a guiding role during the assembly process, the present embodiment includes a guide column 7, and the guide column 7 passes through the fixed mold upper fixed plate 1, the fixed mold runner plate 2 and the fixed mold plate 3 from top to bottom in sequence.

[0040] Based on the above structural principle, the present invention can reduce the manufacturing and use costs of hot runner molds by 30% compared with the prior art, eliminate the generation of plastic sprue materials during the production process, directly save nearly 20% of plastic raw materials, and save electrical energy, effectively improving the performance of automated production and increasing production efficiency by 25%.

[0041] Embodiment 2

[0042] In actual applications, if the flow channel in the flow channel plate is a structure in which one glue inlet corresponds to multiple branch flow channels, the different lengths of the flow channels will cause inconsistent glue flow. At this time, a structure with two upper and lower diverter plates can be adopted. This implementation method mainly has the following problems: First, the diverter plate located at the bottom needs to open more branch flow channels, and the branch flow channels need to avoid each other, so the processing is more difficult; secondly, because the size of the diverter plate is slightly larger, the layout length and range of the electric heater are larger, so there are problems such as low temperature control accuracy and insufficient heating uniformity, which in turn affects the injection molding quality of the workpiece.

[0043] In this regard, this embodiment proposes a two-stage thermal balance split flow multi-cavity structure for an injection mold, combined with Figures 2 to 7As shown, it includes a main balance manifold plate 4 and a plurality of secondary heat balance manifold plates 5, wherein the plurality of secondary heat balance manifold plates 5 are distributed in an array below the main balance manifold plate 4, wherein the main balance manifold plate 4 is provided with a plurality of main branch flow channels 400, wherein a main glue inlet 401 is provided at the top center of the main balance manifold plate 4, wherein the main glue inlet 401 is communicated with the main nozzle 100, wherein a plurality of main glue outlets 402 are provided at the bottom of the main balance manifold plate 4, wherein the inlets of the plurality of main branch flow channels 400 are all communicated with the main glue inlet 401, wherein the main branch flow channels 400 correspond to the main glue outlets 402 one by one, and wherein the outlets of the main branch flow channels 400 are communicated with the main glue outlets 402, wherein the secondary heat balance manifold plate 5 is provided with a plurality of main branch flow channels 400, wherein the main glue inlet 401 is provided at the top center of the main balance manifold plate 4, wherein the main glue inlet 401 is communicated with the main nozzle 100, and wherein the main glue outlet 402 is communicated with the main glue outlet 402, wherein the main branch flow channels 400 are communicated with the main glue outlet 402, wherein the main branch flow channels 400 are communicated with the main glue outlet 402, wherein the main branch flow channels 400 are communicated with the main glue outlet 402, wherein the main branch flow channels 400 are communicated with the main glue outlet 402, wherein the main balance manifold plate 4 is provided with a plurality of main branch flow channels 40 ... A secondary branch flow channel 500, a secondary glue inlet 501 is provided at the top center of the secondary heat balance diverter plate 5, the secondary glue inlet 501 corresponds one-to-one with the main glue outlet 402 and the two are interconnected, a plurality of secondary glue outlets 502 are provided at the bottom of the secondary heat balance diverter plate 5, the inlets of a plurality of secondary branch flow channels 500 are all connected to the secondary glue inlet 501, the secondary branch flow channels 500 correspond one-to-one with the secondary glue outlet 502, and the outlets of the secondary branch flow channels 500 are interconnected with the secondary glue outlet 502, a main electric heater 410 bent according to a preset trajectory is embedded in the top of the main balance diverter plate 4, and a secondary electric heater 510 bent according to a preset trajectory is embedded in the top of the secondary heat balance diverter plate 5.

[0044] In the above structure, a plurality of secondary heat balance diverter plates 5 are arranged below the main balance diverter plate 4. Since the plurality of secondary heat balance diverter plates 5 are distributed in an array, they can be combined into a secondary diverter plate group. Compared with the structure using a whole diverter plate, since there are fewer branch flow channels in each secondary heat balance diverter plate 5, a single secondary heat balance diverter plate 5 is easier to process and each branch flow channel is easier to lay out. In addition, a secondary electric heater 510 and a corresponding temperature acquisition device can be independently set for each secondary heat balance diverter plate 5, so that each secondary heat balance diverter plate 5 can achieve independent temperature control, which is helpful to achieve precise heating and improve the temperature consistency of each secondary heat balance diverter plate 5. In addition, under the upper and lower diversion action of the main balance diverter plate 4 and the plurality of secondary heat balance diverter plates 5, the flow rate of the molten plastic in the plurality of secondary branch flow channels 500 can be made consistent, thereby further improving the injection molding processing quality of the workpiece and better meeting the production requirements.

[0045] As a preferred embodiment, four secondary heat balance manifolds 5 are included, four main glue outlets 402 are provided at the bottom of the main balance manifold 4, and 12 secondary glue outlets 502 are provided at the bottom of each secondary heat balance manifold 5. The four secondary heat balance manifolds 5 can be spliced ​​to form a rectangular structure.

[0046] In order to achieve heat balance, in this embodiment, two main electric heaters 410 are embedded on the top of the main balancing diverter plate 4 , and the two main electric heaters 410 are symmetrically arranged on both sides of the main balancing diverter plate 4 .

[0047] Furthermore, a secondary electric heater 510 is embedded on the top of the secondary heat balance manifold plate 5 , and the secondary electric heater 510 is bent and extended along the circumference of the secondary heat balance manifold plate 5 .

[0048] Embodiment 3

[0049] In practical applications, the injection mold generally includes a manifold and multiple hot nozzles. The hot nozzles are usually fixed under the manifold. In order to achieve good glue flow, the inlet end face of the hot nozzle needs to fit closely to the surface of the manifold, thereby ensuring that the flow channel in the hot nozzle is connected to the flow channel in the manifold. In order to ensure that the hot nozzle has a sufficient temperature, an independent electric heater needs to be added to the hot nozzle. This independent heating method not only makes the internal structure of the mold more complicated, but also makes it difficult to lay out the wires due to the large number of hot nozzles. The failure rate in the production process is also high, and there are many adverse effects.

[0050] In this regard, this embodiment proposes a heater-free hot nozzle structure for an injection mold, combined with Figure 7 and Figure 8 As shown, it includes a secondary heat balance diverter plate 5 and a plurality of hot nozzles 6, a plurality of secondary glue outlets 502 are provided at the bottom of the secondary heat balance diverter plate 5, the hot nozzles 6 correspond to the secondary glue outlets 502 one by one, a threaded hole 511 is formed at the lower end opening of the secondary glue outlet 502, a threaded end 600 is formed at the upper end of the hot nozzle 6, the threaded end 600 is screwed into the threaded hole 511 and the two are sealed, a nozzle flow channel 601 is provided in the hot nozzle 6, the nozzle flow channel 601 runs through the upper and lower ends of the hot nozzle 6, and the inlet of the nozzle flow channel 601 is connected to the secondary glue outlet 502.

[0051] In the above structure, a threaded hole 511 is set at the secondary glue outlet 502 of the secondary heat balance diverter plate 5, and the threaded end 600 at the upper end of the hot nozzle 6 is screwed into the threaded hole 511, so that the hot nozzle 6 is more closely connected to the secondary heat balance diverter plate 5. Because the secondary heat balance diverter plate 5 has a built-in electric heater, the hot nozzle 6 is heated during the heating process of the secondary heat balance diverter plate 5, so that the hot nozzle 6 meets the high temperature requirement. Compared with the prior art, the present invention does not need to add an independent electric heater for the hot nozzle 6, thereby simplifying the internal structure of the mold. Especially when the number of the hot nozzles 6 is large, the wiring work is greatly simplified. It is not only easy to install and maintain, but also can effectively reduce the failure rate, thereby improving the overall performance of the injection mold.

[0052] As a preferred embodiment, an annular shoulder 602 is formed on the outer wall of the hot nozzle 6, and the annular shoulder 602 protrudes to the outside of the hot nozzle 6, and the top surface of the annular shoulder 602 is tightly fitted with the bottom surface of the secondary heat balance diverter plate 5.

[0053] In the above structure, one function of the annular shoulder 602 is to increase the contact area between the hot nozzle 6 and the secondary thermal balance manifold 5, thereby improving the heat conduction capacity of the two. Secondly, the annular shoulder 602 can also increase the connection strength between the hot nozzle 6 and the secondary thermal balance manifold 5, making the connection between the two more stable and reliable.

[0054] In order to facilitate installation of the thermal nozzle 6 with a wrench, in this embodiment, a wrench clamping plane 603 is cut on the outer side wall of the annular shoulder 602 .

[0055] As a preferred embodiment, a heat insulating ring 604 is provided on the hot nozzle 6, and the heat insulating ring 604 is close to the lower end outlet of the nozzle flow channel 601.

[0056] To ensure reliable communication between the nozzle flow channel 601 and the secondary glue outlet 502, in this embodiment, a conical glue inlet 605 is formed at the entrance of the nozzle flow channel 601, and the conical glue inlet 605 is aligned with the secondary glue outlet 502 and the two are connected to each other.

[0057] Embodiment 4

[0058] In actual applications, the injection mold needs to be cleaned after completing a certain production task. At this time, the injection mold needs to be disassembled. At the same time, when the fixed mold plate or the mold core needs to be replaced, the injection mold also needs to be disassembled. During the disassembly process, each component is generally disassembled one by one, which makes the disassembly and assembly process cumbersome and inefficient.

[0059] In this regard, this embodiment proposes a quick disassembly and assembly mechanism for an injection mold, which can be seen in Figure 7 , which comprises a fixed mold upper fixed plate 1, a fixed mold runner plate 2, a fixed mold plate 3, a main balanced manifold plate 4, a plurality of secondary heat balanced manifold plates 5 and a plurality of hot nozzles 6, wherein the fixed mold upper fixed plate 1, the fixed mold runner plate 2 and the fixed mold plate 3 are sequentially fitted from top to bottom, the main balanced manifold plate 4 and the secondary heat balanced manifold plate 5 are both embedded in the fixed mold runner plate 2, the main balanced manifold plate 4 is arranged on the top of the secondary heat balanced manifold plate 5 and the two are stacked, the upper end of the hot nozzle 6 is fixedly connected to the secondary heat balanced manifold plate 5, a plurality of mold cores 300 are embedded in the fixed mold plate 3, and the outlet of the hot nozzle 6 is connected to the mold core The mold cavity 301 of 300 is connected, and a main fixing screw 404 is inserted into the main balancing diverter plate 4, and a main fixing screw 404 is inserted into the main balancing diverter plate 4, and the upper end of the main fixing screw 404 is screwed into the fixed mold upper fixed plate 1, and the main balancing diverter plate 4 is fixedly connected to the fixed mold upper fixed plate 1 by the main fixing screw 404, and a secondary fixing screw 506 is inserted into the secondary thermal balance diverter plate 5, and the upper end of the secondary fixing screw 506 is screwed into the fixed mold runner plate 2, and the secondary thermal balance diverter plate 5 is fixedly connected to the fixed mold runner plate 2 by the secondary fixing screw 506.

[0060] In the above structure, the main fixing screw 404 passes through the main balancing diverter plate 4 from bottom to top, and is screwed into the fixed mold upper fixed plate 1, so that the main balancing diverter plate 4 and the fixed mold upper fixed plate 1 constitute a component, and the secondary fixing screw 506 passes through the secondary thermal balance diverter plate 5 from bottom to top, and is screwed into the fixed mold runner plate 2, so that the secondary thermal balance diverter plate 5 and the fixed mold runner plate 2 constitute a component. During disassembly and assembly, the main balancing diverter plate 4 and the fixed mold upper fixed plate 1 can be disassembled as a whole for cleaning, and the secondary thermal balance diverter plate 5 and the fixed mold runner plate 2 can be disassembled as a whole for cleaning. Compared with the method of disassembling all the components in the prior art, the present invention greatly simplifies the disassembly and assembly process, thereby improving the disassembly and installation efficiency.

[0061] In order to play a guiding role during the disassembly and assembly process and thus improve the installation accuracy, the present embodiment includes a guide column 7, which passes through the fixed mold upper fixed plate 1, the fixed mold runner plate 2 and the fixed mold plate 3 from top to bottom.

[0062] As a preferred embodiment, the fixed mold upper fixing plate 1 , the fixed mold runner plate 2 and the fixed mold plate 3 are all slidably matched with the guide pillars 7 .

[0063] In order to realize the center positioning function, in this embodiment, a vertically arranged center positioning pin 302 is provided at the top center of the fixed template 3 , and the upper end of the center positioning pin 302 is connected to the main balancing diverter plate 4 .

[0064] As a preferred embodiment, the central positioning pin 302 is located between a plurality of secondary heat balance manifold plates 5 .

[0065] Embodiment 5

[0066] In actual applications, the molten plastic material after being diverted by the diverter plate needs to be transferred to the mold core cavity through the hot nozzle. The connection between the diverter plate and the hot nozzle generally adopts a fitting connection method, that is, the rear end face of the hot nozzle is fitted to the bottom surface of the diverter plate. This connection method makes it difficult to seal between the two, and it is easy to leak glue during the production process, which in turn affects the processing quality and makes it difficult to meet production requirements.

[0067] In this regard, this embodiment proposes a hot nozzle rear end sealing mechanism for an injection mold, see Figure 7 and Figure 8 The hot nozzle 6 comprises a fixed mold plate 3, a secondary heat balance manifold plate 5 and a hot nozzle 6. The bottom of the secondary heat balance manifold plate 5 is provided with a secondary glue outlet 502. A threaded hole 511 is formed at the lower end opening of the secondary glue outlet 502. A threaded end 600 is formed at the upper end of the hot nozzle 6. The threaded end 600 is screwed into the threaded hole 511 and the two are sealed. A nozzle flow channel 601 is provided in the hot nozzle 6. The nozzle flow channel 601 runs through the hot nozzle. 6, the inlet of the nozzle flow channel 601 is connected to the secondary glue outlet 502, the lower end of the hot nozzle 6 is inserted into the fixed template 3, and the outer side of the hot nozzle 6 is sleeved with a sealing glue pressure support ring 610, the sealing glue pressure support ring 610 is clamped between the fixed template 3 and the secondary thermal balance diverter plate 5, and the fixed template 3, the secondary thermal balance diverter plate 5 and the hot nozzle 6 are all sealed with the sealing glue pressure support ring 610.

[0068] In the above structure, since the threaded end 600 at the upper end of the hot nozzle 6 is threadedly matched with the threaded hole 511 at the bottom of the secondary thermal balance diverter plate 5, the connection between the two is tighter and more reliable, thereby playing a role of preliminary sealing and preventing glue leakage. On this basis, the present invention is provided with a sealing pressure support ring 610 on the outer side of the hot nozzle 6, and at the same time, the sealing pressure support ring 610 is clamped between the fixed mold plate 3 and the secondary thermal balance diverter plate 5. Under the action of the sealing pressure support ring 610, the sealing performance between the hot nozzle 6 and the secondary thermal balance diverter plate 5 is further enhanced, so that the sealing ability of the connection between the two is stronger, which helps to improve the quality of injection molding and better meet the production requirements.

[0069] As a preferred embodiment, an annular shoulder 602 is formed on the outer wall of the hot nozzle 6, and the annular shoulder 602 protrudes to the outside of the hot nozzle 6, and the top surface of the annular shoulder 602 is tightly fitted with the bottom surface of the secondary heat balance diverter plate 5.

[0070] In order to better match the hot nozzle 6 , in this embodiment, the sealing pressure support ring 610 is sleeved on the outer side of the annular shoulder 602 .

[0071] In this embodiment, the outer wall of the sealing pressure support ring 610 is formed with an annular step portion 611, and two fastening screws 310 are screwed on the top of the fixed template 3. The two fastening screws 310 are symmetrically arranged on both sides of the sealing pressure support ring 610, and the nuts of the fastening screws 310 are pressed against the annular step portion 611, and the sealing pressure support ring 610 is fixed to the top of the fixed template 3 by the two fastening screws 310.

[0072] The function of the annular step portion 611 helps to fix the sealing pressure support ring 610 by tightening the screws 310, thereby avoiding displacement and deformation of the sealing pressure support ring 610 during the assembly process, so that the sealing pressure support ring 610 can fully play the sealing and supporting role.

[0073] In order to accommodate the annular step portion 611 , in this embodiment, a socket 311 is provided on the top of the fixed mold plate 3 , and the lower end of the sealing pressure support ring 610 is inserted into the socket 311 .

[0074] Furthermore, the annular step portion 611 is located at the lower end of the sealing pressure support ring 610 .

[0075] In order to facilitate the insertion of the annular step portion 611 , in this embodiment, a chamfered portion 612 is formed at the lower edge of the annular step portion 611 .

[0076] Embodiment 6

[0077] In practical applications, an insulation ring is generally provided on the outside of the hot nozzle of the injection mold, and the insulation ring needs to be inserted into the corresponding nozzle socket. In order to achieve sealing at the plug-in position, the insulation ring and the nozzle socket are generally set to be in a close fit. This plug-in relationship mainly has the following problems. First, due to the large plug-in contact surface, the insulation ring and the nozzle socket cannot be guaranteed to fit reliably. Once there is a gap, glue leakage will occur. In addition, when the contact surface is large, the friction between the two is also large, which makes it difficult to insert and disassemble the insulation ring and the nozzle socket, so there are many adverse effects.

[0078] In this regard, this embodiment proposes a double sealing mechanism for the thermal nozzle insulation ring, combined with Figure 7 , Figure 8 and Fig. 9 As shown, it includes a hot nozzle 6 and a mold core 300, the top of the mold core 300 is provided with a nozzle socket 320, the hot nozzle 6 is sleeved with an insulation ring 604, the insulation ring 604 is close to the lower end of the hot nozzle 6, and the insulation ring 604 is inserted in the nozzle socket 320, the nozzle socket 320 includes a sealing inner wall 321, the sealing inner wall 321 is close to the lower end of the nozzle socket 320, and the diameter of the sealing inner wall 321 is smaller than the diameter of the nozzle socket 320, and the insulation ring 604 is formed with a sealing outer wall 620, the sealing outer wall 620 is close to the insulation ring 604 At the lower end, the sealing outer wall 620 and the sealing inner wall 321 fit together and the joint between the two is sealed to each other, the outer wall of the insulation ring 604 is formed with an annular sealing flange 621, and the sealing flange 621 extends along the circumference of the insulation ring 604, and the sealing flange 621 is close to the upper end of the insulation ring 604, the outer wall of the sealing flange 621 and the inner wall of the nozzle socket 320 fit together and the joint between the two is sealed to each other, during installation, first slide the sealing flange 621 into the nozzle socket 320, and then fit the sealing outer wall 620 to the sealing inner wall 321.

[0079] In the above structure, the diameter of the sealing inner wall 321 is smaller than the diameter of the nozzle socket 320, so that the inner wall of the nozzle socket 320 is stepped. At the same time, an annular sealing flange 621 is formed on the outer wall of the heat insulating ring 604. During assembly, the sealing flange 621 is first slid into the nozzle socket 320 so that the sealing flange 621 can be initially sealed with the inner wall of the nozzle socket 320. In this process, the plug-in contact surface is small, and the friction of the contact surface is also small. Finally, the heat insulating ring is inserted into the nozzle socket 320. The front end of 604 is inserted into the sealing inner wall 321, and the sealing outer wall 620 is fitted to the sealing inner wall 321. Based on the above principle, it can be seen that the present invention realizes front end sealing by the cooperation between the sealing outer wall 620 and the sealing inner wall 321, and realizes secondary sealing by the cooperation between the sealing flange 621 and the nozzle socket 320, thereby realizing a double glue sealing function, which can not only avoid glue leakage, but also reduce friction during disassembly and assembly, thereby reducing the difficulty of disassembly and assembly, and better meeting production requirements.

[0080] In order to facilitate the insertion of the thermal insulation ring 604 , in this embodiment, a conical end portion 622 is formed at the front edge of the thermal insulation ring 604 .

[0081] As a preferred embodiment, the cross section of the sealing flange 621 is trapezoidal. Based on the trapezoidal structure, both the front and rear ends of the sealing flange 621 have inclined surfaces, so that the sealing flange 621 is conveniently inserted into the nozzle socket 320 or slid out of the nozzle socket 320.

[0082] As a preferred embodiment, a nozzle flow channel 601 is opened in the hot nozzle 6 , and the nozzle flow channel 601 runs through the upper and lower ends of the hot nozzle 6 .

[0083] In this embodiment, the lower end of the hot nozzle 6 is formed with a conical tip 623, and the side of the conical tip 623 is provided with a plurality of glue outlet narrow openings 624, and the plurality of glue outlet narrow openings 624 are interconnected with the nozzle flow channel 601. The plurality of glue outlet narrow openings 624 can realize uniform glue outlet.

[0084] As a preferred embodiment, the plurality of glue outlet narrow openings 624 are evenly distributed along the circumference of the conical tip portion 623 .

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic workpiece injection mold, characterized in that: The invention comprises a fixed plate on a fixed mold, a fixed mold flow channel plate, a fixed mold plate, a main balanced flow divider plate, a secondary heat balanced flow divider plate and a plurality of hot nozzles, wherein the fixed plate on the fixed mold, the fixed mold flow channel plate and the fixed mold plate are sequentially fitted from top to bottom, the main balanced flow divider plate and the secondary heat balanced flow divider plate are both embedded in the fixed mold flow channel plate, the main balanced flow divider plate is arranged on the top of the secondary heat balanced flow divider plate and the two are stacked, a main nozzle for injecting molten plastic is arranged at the center of the fixed plate on the fixed mold, a plurality of main branch flow channels are provided in the main balanced flow divider plate, a main glue inlet is provided at the top center of the main balanced flow divider plate, the main glue inlet is communicated with the main nozzle, a plurality of main glue outlets are provided at the bottom of the main balanced flow divider plate, the entrances of a plurality of main branch flow channels are all communicated with the main glue inlet, the main branch flow channels The secondary heat balance manifold has a one-to-one correspondence with the main glue outlet, and the outlet of the main branch flow channel is interconnected with the main glue outlet. A plurality of secondary branch flow channels are provided in the secondary heat balance manifold. A secondary glue inlet is provided at the top of the secondary heat balance manifold. The secondary glue inlet corresponds to the main glue outlet one-to-one and the two are interconnected. A plurality of secondary glue outlets are provided at the bottom of the secondary heat balance manifold. The inlets of a plurality of secondary branch flow channels are all connected to the secondary glue inlet. The secondary branch flow channels correspond to the secondary glue outlet one-to-one, and the outlets of the secondary branch flow channels are interconnected with the secondary glue outlet. The hot nozzle corresponds to the secondary glue outlet one-to-one, and the inlet of the hot nozzle is interconnected with the secondary glue outlet. A plurality of mold cores are embedded in the fixed mold plate, and the outlet of the hot nozzle is connected to the mold cavity of the mold core. A plurality of hollow support rings are provided on the top of the secondary heat balance manifold plate, the support rings are clamped between the main balance manifold plate and the secondary heat balance manifold plate, and the support rings are connected between the main glue outlet and the secondary glue inlet; The cross section of the support ring is "T" shaped, the lower end of the support ring is inserted into the secondary heat balance manifold plate, and the upper and lower ends of the support ring are respectively sealed with the main balance manifold plate and the secondary heat balance manifold plate, and a second gap is formed between the main balance manifold plate and the secondary heat balance manifold plate by the support of the support ring; A second stop pin is provided in the second gap, the upper end of the second stop pin is inserted in the main balance manifold plate, and the lower end of the second stop pin is inserted in the secondary heat balance manifold plate; Two main electric heaters are embedded on the top of the main balancing manifold plate, and the two main electric heaters are symmetrically arranged on both sides of the main balancing manifold plate. A secondary electric heater is embedded on the top of the secondary heat balancing manifold plate, and the secondary electric heater is bent and extended around the secondary heat balancing manifold plate. A threaded hole is formed at the lower opening of the secondary glue outlet, a threaded end is formed at the upper end of the hot nozzle, the threaded end is screwed into the threaded hole and the two are sealed, a nozzle flow channel is opened in the hot nozzle, the nozzle flow channel runs through the upper and lower ends of the hot nozzle, and the inlet of the nozzle flow channel is connected to the secondary glue outlet; The upper end of the hot nozzle is fixedly connected to the secondary heat balance manifold plate, a main fixing screw is inserted into the main balance manifold plate, a main fixing screw is inserted into the main balance manifold plate, the upper end of the main fixing screw is screwed into the fixed mold upper fixing plate, the main balance manifold plate is fixedly connected to the fixed mold upper fixing plate by the main fixing screw, a secondary fixing screw is inserted into the secondary heat balance manifold plate, the upper end of the secondary fixing screw is screwed into the fixed mold runner plate, the secondary heat balance manifold plate is fixedly connected to the fixed mold runner plate by the secondary fixing screw; The lower end of the hot nozzle is inserted into the fixed mold plate, and a sealing pressure support ring is sleeved on the outer side of the hot nozzle. The sealing pressure support ring is clamped between the fixed mold plate and the secondary heat balance manifold, and the fixed mold plate, the secondary heat balance manifold and the hot nozzle are all sealed with the sealing pressure support ring. The outer side wall of the sealant pressure support ring is formed with an annular step portion, and the top of the fixed template is screwed with two fastening screws, which are symmetrically arranged on both sides of the sealant pressure support ring, and the nuts of the fastening screws are pressed against the annular step portion, and the sealant pressure support ring is fixed to the top of the fixed template by the two fastening screws; A nozzle socket is provided at the top of the mold core, and an insulation ring is provided on the hot nozzle, the insulation ring is close to the lower end of the hot nozzle, and the insulation ring is inserted in the nozzle socket, the nozzle socket includes a sealing inner wall, the sealing inner wall is close to the lower end of the nozzle socket, and the diameter of the sealing inner wall is smaller than the diameter of the nozzle socket, a sealing outer wall is formed on the insulation ring, the sealing outer wall is close to the lower end of the insulation ring, the sealing outer wall and the sealing inner wall are in contact with each other, and the contact between the two is sealed to each other, and an annular sealing flange is formed on the outer wall of the insulation ring, the sealing flange extends along the circumference of the insulation ring, and the sealing flange is close to the upper end of the insulation ring, the outer wall of the sealing flange and the inner wall of the nozzle socket are in contact with each other, and the contact between the two is sealed to each other, and during installation, the sealing flange is first slid into the nozzle socket, and then the sealing outer wall is in contact with the sealing inner wall.

2. The plastic workpiece injection mold according to claim 1, characterized in that: The main nozzle extends downward and is inserted into the main balancing diverter plate, and the connection between the main nozzle and the main balancing diverter plate is sealed and matched.

3. The plastic workpiece injection mold according to claim 1, characterized in that: A plurality of upper support blocks are embedded in the bottom of the fixed mold upper fixed plate and the two are fixedly connected, and a plurality of lower support blocks are fixed on the top of the main balancing diverter plate, the upper support blocks are aligned one by one with the lower support blocks, and the upper support blocks and the lower support blocks abut against each other, and a first gap is formed between the fixed mold upper fixed plate and the main balancing diverter plate by the supporting effect of the upper support blocks and the lower support blocks.

4. The plastic workpiece injection mold according to claim 3, characterized in that: A first stop pin is provided in the first gap, the upper end of the first stop pin is inserted in the fixed plate on the fixed mold, and the lower end of the first stop pin is inserted in the main balance diverter plate.

5. The plastic workpiece injection mold according to claim 1, characterized in that: It comprises a guide column, which passes through the fixed mold upper fixing plate, the fixed mold flow channel plate and the fixed mold plate in sequence from top to bottom.

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