Search

CN-122008491-A - Injection mold and injection equipment

CN122008491ACN 122008491 ACN122008491 ACN 122008491ACN-122008491-A

Abstract

The invention discloses an injection mold and injection equipment, and relates to the field of mold equipment. The injection mold includes a first mold assembly, a second mold assembly, and a third mold assembly. The first mold assembly comprises a first mold core, the second mold assembly comprises a second mold core and a third mold core, and the third mold assembly comprises a fourth mold core. The first die core and the second die core are enclosed to form a first cavity for injection molding when the die is closed, and the third die core and the fourth die core are enclosed to form a second cavity for injection molding when the die is closed. The first mold assembly has a first hot runner system with runners of the first hot runner system in communication with gates of the first cavity. The second mold assembly has a second hot runner system with runners of the second hot runner system in communication with gates of the second cavity. On the basis of keeping the high yield advantage of the laminated mold, the invention effectively optimizes the arrangement mode of the hot runner system, reduces the structural burden of the mold, and improves the balance, stability and reliability of the injection molding process.

Inventors

  • YU TIEJUN

Assignees

  • 佛山市川一精密机械有限责任公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (10)

  1. 1. The injection mold is characterized by comprising a first mold assembly, a second mold assembly and a third mold assembly which are sequentially stacked and can be opened and closed relatively; the first die assembly comprises a first die core, the second die assembly comprises a second die core and a third die core, and the third die assembly comprises a fourth die core; The first die core and the second die core are enclosed to form a first cavity for injection molding when being matched with each other, and the third die core and the fourth die core are enclosed to form a second cavity for injection molding when being matched with each other; The first mold assembly is provided with a first hot runner system, the first hot runner system is connected with the injection molding machine, and a runner of the first hot runner system is communicated with a runner of the first cavity; The second mold assembly is provided with a second hot runner system, a runner of the second hot runner system is communicated with a runner of the second cavity, and the runner of the first hot runner system is connected with the runner of the second hot runner system to form a continuous runner structure during mold closing.
  2. 2. An injection mold according to claim 1, wherein: The flow channels of the first hot runner system and/or the second hot runner system are provided with control valves, and the control valves can be switched between a first position and a second position; When the control valve is in the first position, the flow channel of the first hot runner system is communicated with the flow channel of the second hot runner system, and when the control valve is in the second position, the communication between the flow channel of the first hot runner system and the flow channel of the second hot runner system is blocked.
  3. 3. An injection mold according to claim 2, wherein: The runner of the first hot runner system is provided with a plurality of first needle valve type connecting hot nozzles, and the runner of the second hot runner system is provided with a plurality of second needle valve type connecting hot nozzles; And when the mold is closed, the first needle valve type connecting hot nozzle is connected with the corresponding second needle valve type connecting hot nozzle, so that the runner of the first hot runner system is connected with the runner of the second hot runner system.
  4. 4. An injection mold according to claim 1, wherein: The first hot runner system comprises a first flow distribution plate, a plurality of first needle valve type injection hot nozzles and a plurality of first needle valve type connection hot nozzles; The first needle valve type injection molding hot nozzle is arranged on the first flow distribution plate and is communicated with a first flow distribution channel in the first flow distribution plate; The first needle valve type connecting hot nozzle is arranged on the first flow distribution plate and is communicated with a first flow distribution channel inside the first flow distribution plate, and the first needle valve type connecting hot nozzle is connected with a flow channel of the second hot runner system during die assembly.
  5. 5. The injection mold of claim 4 wherein said first mold assembly comprises: A panel; the first splitter plate carrier plate is connected with the panel, and the first hot runner system is arranged on the first splitter plate carrier plate; The first die core is connected with the splitter plate carrier plate and is provided with a coolant channel.
  6. 6. An injection mold according to claim 1, wherein: the second hot runner system comprises a second flow dividing plate, a plurality of second needle valve type injection hot nozzles and a plurality of second needle valve type connection hot nozzles; The second needle valve type injection molding hot nozzle is arranged on the second flow dividing plate and is communicated with a second flow dividing channel in the second flow dividing plate; the second needle valve type connecting hot nozzle is arranged on the second flow dividing plate and communicated with a second flow dividing channel in the second flow dividing plate, and is connected with the flow channel of the first hot runner system during die assembly.
  7. 7. The injection mold of claim 6 wherein said second mold assembly comprises: The first die core backing plate is connected with the second die core; the second splitter plate carrier plate is connected with the first die core base plate, and the second hot runner system is arranged on the second splitter plate carrier plate; The second die core backing plate is connected with the second flow distribution plate carrier plate, and the second flow distribution plate carrier plate is positioned between the first die core backing plate and the second die core backing plate.
  8. 8. An injection mold as in claim 1 further comprising: A load bearing structure coupled to the second mold assembly, the load bearing structure configured to fixedly couple the second mold assembly to a frame or a movement mechanism of an injection molding machine.
  9. 9. The injection mold of claim 8 wherein the load bearing structure comprises: The support plate is used for being connected with a rack or a moving mechanism of the injection molding machine; the two bases are connected with the bearing plate and are respectively positioned at two sides of the surface of the bearing plate at intervals; The two fixing blocks are respectively and correspondingly connected with the two bases, and are connected with the first die core base plate, the second splitter plate carrier plate and the second die core base plate in a stacked mode through bolts.
  10. 10. Injection molding apparatus, characterized in that it is provided with an injection mold according to any of the preceding claims 1-9.

Description

Injection mold and injection equipment Technical Field The invention relates to the technical field of mold equipment, in particular to an injection mold and injection equipment. Background Injection molding is one of the most widely used processes in the processing of plastic articles. With the continuous increase of the demand for plastic products, the injection molding industry has put higher demands on production efficiency, cost control and equipment resource utilization. In order to increase the throughput per unit time and reduce the cost of the parts, laminating molds (also known as lamination molds or Mack molds) are widely used. The mold realizes that the yield in unit injection molding circulation is multiplied according to the number of layers of the cavity by arranging a plurality of layers of overlapped cavities between the movable mold and the fixed mold, and simultaneously does not need to obviously improve the mold locking force of the injection molding machine, thereby improving the utilization rate of equipment. However, the existing lamination type mold is generally composed of a movable mold, a middle mold and a fixed mold, and a design of centralized glue feeding of the middle mold is adopted in many cases. In this design, the hot runners are arranged centrally in the intermediate mould, through which glue is supplied to the injection mould cavities distributed on both sides simultaneously. The applicant finds that when the injection molding cavities on two sides of the middle mold produce different injection molding workpieces, the geometric shapes, the runner lengths and the distribution positions of the injection molding cavities are different, the flow resistances of molten plastics of the different injection molding cavities are inconsistent, and the phenomenon of uneven glue feeding easily occurs in a mode of synchronizing two sides of the middle mold. In addition, the centralized arrangement of the hot runners of the middle mold increases the weight of the mold, makes the installation and maintenance of the mold complex, and is easy to generate eccentricity, abrasion and other faults, thereby limiting the production efficiency and the service life of the mold. Disclosure of Invention In order to solve the technical problems that the prior laminated mold usually adopts a design scheme that middle molds are concentrated for feeding glue, so that the weight of the mold is overlarge, the installation and the maintenance are complex, and the production efficiency and the service life of the mold are restricted, the invention aims to provide the injection mold, which effectively optimizes the arrangement mode of a hot runner system on the basis of keeping the high yield advantage of the laminated mold, reduces the structural burden of the mold and improves the balance, the stability and the reliability of the injection molding process, thereby improving the overall production efficiency of the mold. The aim of the invention is achieved by the following technical scheme: In a first aspect, the present invention provides an injection mold, including a first mold assembly, a second mold assembly, and a third mold assembly that are sequentially stacked and arranged and capable of relatively opening and closing the mold; the first die assembly comprises a first die core, the second die assembly comprises a second die core and a third die core, and the third die assembly comprises a fourth die core; The first die core and the second die core are enclosed to form a first cavity for injection molding when being matched with each other, and the third die core and the fourth die core are enclosed to form a second cavity for injection molding when being matched with each other; The first mold assembly is provided with a first hot runner system, the first hot runner system is connected with the injection molding machine, and a runner of the first hot runner system is communicated with a runner of the first cavity; The second mold assembly is provided with a second hot runner system, a runner of the second hot runner system is communicated with a runner of the second cavity, and the runner of the first hot runner system is connected with the runner of the second hot runner system to form a continuous runner structure during mold closing. With reference to the first aspect, the present invention further provides a first specific implementation manner of the first aspect, preferably, the flow channel of the first hot runner system and/or the second hot runner system is provided with a control valve, and the control valve is capable of being switched between a first position and a second position; When the control valve is in the first position, the flow channel of the first hot runner system is communicated with the flow channel of the second hot runner system, and when the control valve is in the second position, the communication between the flow channel of the first hot runner system and the flow