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CN-119658954-B - Injection molding device with surface modification structure

CN119658954BCN 119658954 BCN119658954 BCN 119658954BCN-119658954-B

Abstract

The invention relates to an injection molding device with a surface modification structure, which comprises a mold closing structure, a first injection assembly, a melting and mixing assembly and a second injection assembly, wherein the mold closing structure comprises a mold closing bed body, a first mold plate and a second mold plate which are oppositely arranged on the mold closing bed body, and a third mold plate positioned between the first mold plate and the second mold plate, wherein the first mold plate and the second mold plate are respectively provided with a first mold and a second mold, the two sides of the third mold plate are respectively provided with a third mold and a fourth mold, the third mold plate is connected with the mold closing bed body, the mold closing structure is provided with a first mold closing state and a second mold closing state, the first injection assembly is provided with an injection cylinder and a nozzle, the nozzle is communicated with the second mold plate, the melting and mixing assembly comprises a screw extruder and a melt buffer which are mutually communicated, and the second injection assembly is communicated with the first mold. The invention integrates an on-line mixing technology, an injection compression technology, an in-mold modification technology and the like in the same injection molding device. Therefore, the light-weight parts are completed by the modified formula mixing, injection compression technology and the like in one period, and the requirements of the industry on high efficiency, light weight, carbon reduction, economy and extreme surface are met.

Inventors

  • LIU TAO
  • Zhang Zhaojiang
  • REN XINTING

Assignees

  • 克劳斯玛菲机械(中国)有限公司

Dates

Publication Date
20260512
Application Date
20250120

Claims (7)

  1. 1. An injection molding apparatus having a surface modifying structure, comprising: A clamping structure (10), wherein the clamping structure (10) comprises a clamping bed body (11), a first template (12) and a second template (13) which are oppositely arranged on the clamping bed body (11), and a third template (14) which is positioned between the first template (12) and the second template (13), wherein a first die (15) and a second die (16) are respectively arranged on the first template (12) and the second template (13), a third die (17) and a fourth die (18) are respectively arranged on two sides of the third template (14), and the third template (14) is connected with the clamping bed body (11) so that the clamping structure (10) has a first clamping state and a second clamping state; a first injection assembly (20), wherein an injection machine barrel (21) and a nozzle (22) are arranged on the first injection assembly (20), and the nozzle (22) is communicated with the second template (13) and is used for injecting a first component material into a die; a melt-kneading assembly (30), wherein the melt-kneading assembly (30) comprises a screw extruder (31) and a melt buffer (32) which are communicated with each other, the screw extruder (31) is used for heating and extruding a first component material, and the injection cylinder (21) is respectively communicated with the melt buffer (32) and the nozzle (22) through a reversing valve; A second injection assembly (40), the second injection assembly (40) being in communication with the first die plate (12) for injecting a second component material into the die; The die closing structure (10) further comprises a first distance meter (60) and a second distance meter (70), wherein the first distance meter (60) comprises a first receiver (61) arranged on a first die (15) and a first transmitter (62) arranged on a third die (17), and the second distance meter (70) comprises a second receiver (71) arranged on a second die (16) and a second transmitter (72) arranged on a fourth die (18); In the first clamping state, a first receiver (61) receives a signal of a first emitter (62) and is used for detecting the distance between a first die (15) and the parting surface of the third die (17), a second receiver (71) receives a signal of a second emitter (72) and is used for detecting the distance between the second die (16) and the parting surface of the fourth die (18), in the second clamping state, the first receiver (61) receives a signal of the second emitter (72) and is used for detecting the distance between the first die (15) and the parting surface of the fourth die (18), and a second receiver (71) receives a signal of the first emitter (62) and is used for detecting the distance between the second die (16) and the parting surface of the third die (17); The first template (12) and the third template (14) are in sliding connection with the clamping bed body (11), the clamping structure (10) further comprises a first driving piece (19) and a third driving piece, the first driving piece (19) is connected with the first template (12), the third driving piece is connected with the third template (14), the direction in which the first template (12) and the second template (13) are oppositely arranged is a first direction, and the installation position of the first driving piece (19) is arranged in a collinear manner with the installation positions of the first range finder (60) and the second range finder (70) in the first direction; The injection molding device comprises a controller (81), wherein the controller (81) is respectively and electrically connected with the first driving piece (19) and the first distance measuring instrument (60) and the second distance measuring instrument (70) and is used for controlling the first driving piece (19) according to detection results of the first distance measuring instrument (60) and the second distance measuring instrument (70).
  2. 2. An injection molding apparatus having a surface modifying structure according to claim 1, wherein the injection molding apparatus comprises a modifying material mixing assembly (50), the modifying material mixing assembly (50) comprising a plurality of stock storage tanks (51) and a plurality of flow meters (52), the stock storage tanks (51) for storing different stock materials, the plurality of different stock materials for mixing to form a surface modifying material, the stock storage tanks (51) in communication with the first mold (15) via the flow meters (52).
  3. 3. An injection molding apparatus having a surface modifying structure according to claim 2, wherein the modifying material mixing assembly (50) further comprises a fluid pump (53), the fluid pump (53) being disposed between the flow meter (52) and the raw material storage tank (51).
  4. 4. An injection molding apparatus having a surface modifying structure according to claim 3, wherein the modifying material mixing assembly (50) comprises a mixing head, both ends of which are respectively communicated with the flow meter (52) and the first mold (15).
  5. 5. An injection molding apparatus having a surface modifying structure according to claim 4, wherein the raw material storage tank (51) and the mixing head are provided with raw material heating members.
  6. 6. An injection molding apparatus with a surface modifying structure according to claim 1, wherein the screw extruder (31) comprises an extruder barrel and an extrusion screw, the extrusion screw is disposed in the extruder barrel, the extruder barrel is in communication with the melt buffer (32), an extrusion heating member is disposed on the extruder barrel, and a melting heating member is disposed on the melt buffer (32).
  7. 7. The injection molding device with the surface modification structure according to claim 6, wherein a feed port is arranged on the extruder barrel, and a weightlessness weighing scale is arranged on the feed port.

Description

Injection molding device with surface modification structure Technical Field The invention relates to the technical field of injection molding, in particular to an injection molding device with a surface modification structure. Background With the development of new energy automobiles, the structure and the function of vehicle parts are more and more complex, one vehicle part is generally composed of multiple parts of various materials, compression foaming is needed for light weight and weight reduction design, and the appearance of the vehicle part is also needed to be modified. Therefore, the production process of the vehicle part is very complex, and a plurality of production process lines are required to be matched, so that the requirement on the die precision of the plurality of production processes is high, the quality of the product is low, and the production efficiency is low. In-mold painting is a process integrating injection molding and reaction molding, and the painting is integrated in the molding mode in the injection molding process. The Polyurethane (PUR) or Polyurea (PUA) is used as a surface material to be coated on an injection molding product, so that the surface of the injection molding product is subjected to appearance modification. Compared with the traditional spraying procedure, the in-mold painting effectively shortens the technological process, reduces the production cost, has high design freedom, directly releases the mold with high glossiness, does not need subsequent polishing, maximizes the production efficiency, greatly improves the yield, has compact design and saves the production space. In order to solve this problem, a surface-modified lightweight part molding apparatus and method including an extrusion kneading system have been developed. The method comprises the steps of loading blending equipment comprising screw extrusion on a multi-component injection molding machine, simultaneously introducing a compression technology and a parallelism control function to complete a light-weight component base material, and additionally installing RIM equipment of a reaction molding system on one side of a secondary injection table to complete an in-mold modification technology of polyurethane, so that the light-weight component is finished by PUR surface modification comprising modified formula blending, injection compression technology and the like in one period. Meets the requirements of the industry on high efficiency, light weight, carbon reduction, economy and extreme surface. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide an injection molding device with a surface modification structure, so that the production efficiency and the production quality of injection products are improved. The aim of the invention can be achieved by the following technical scheme: An injection molding apparatus having a surface modifying structure, comprising: the mold clamping structure comprises a mold clamping machine body, a first mold plate, a second mold plate and a third mold plate, wherein the first mold plate and the second mold plate are oppositely arranged on the mold clamping machine body, the third mold plate is positioned between the first mold plate and the second mold plate, a first mold and a second mold are respectively arranged on the first mold plate and the second mold plate, a third mold and a fourth mold are respectively arranged on two sides of the third mold plate, the third mold plate is connected with the mold clamping machine body, so that the mold clamping structure has a first mold clamping state and a second mold clamping state; The first injection assembly is provided with an injection machine barrel and a nozzle, and the nozzle is communicated with the second template and is used for injecting a first component material into the die; The melt mixing assembly comprises a screw extruder and a melt buffer which are communicated with each other, the screw extruder is used for heating and extruding a first component material, and the injection machine barrel is respectively communicated with the melt buffer and the nozzle through a reversing valve; and the second injection assembly is communicated with the first template and is used for injecting a second component material into the die. In one embodiment, the injection molding apparatus includes a trim material mixing assembly including a plurality of feedstock storage tanks for storing different feedstock and a plurality of flow meters for mixing to form a second component material, the feedstock storage tanks in communication with the first mold via the flow meters. In one embodiment, the trim material mixing assembly further comprises a fluid pump disposed between the flow meter and the feedstock storage tank. In one embodiment, the trim material mixing assembly includes a mixing head, two ends of which are respectively in communication with the flow meter and the firs