Search

CN-116422547-B - Carbon fiber product paint filling mold and carbon fiber product surface paint filling processing method

CN116422547BCN 116422547 BCN116422547 BCN 116422547BCN-116422547-B

Abstract

The invention discloses a carbon fiber product paint filling mold and a carbon fiber product surface paint filling processing method, wherein the carbon fiber product paint filling mold comprises a movable mold, a fixed mold and a heating device, a movable mold cavity, a movable mold feed chute, a paint filling opening, a movable mold flash cavity and a movable mold flash buffer cavity are arranged on the movable mold, a fixed mold cavity, a fixed mold feed chute, a fixed mold flash cavity and a fixed mold flash buffer cavity are arranged on the fixed mold, a feeding flow channel forming cavity, a flash buffer cavity and a flash bag which are communicated with a paint filling opening in a sealing manner are sequentially formed after the fixed mold and the movable mold are in butt joint.

Inventors

  • MIAO JUAN
  • YANG GUIXIANG

Assignees

  • 昆山金运新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20230410

Claims (9)

  1. 1. The carbon fiber product paint filling mold comprises a movable mold (1), a fixed mold (2) and a heating device (9), wherein the movable mold can move towards the fixed mold, one side of the fixed mold is provided with the heating device, the heating device can heat the movable mold and the fixed mold respectively, the movable mold is provided with a movable mold cavity (11), a movable mold feeding groove (12), a paint filling opening (13) and a movable mold flash cavity (14), the fixed mold is provided with a fixed mold cavity (21), a fixed mold feeding groove (22) and a fixed mold flash cavity (23), the movable mold cavity and the fixed mold cavity can be abutted to form a sealed molding cavity (3), the fixed mold cavity is provided with a product positioning structure capable of stopping and positioning a product to be filled with paint, a paint filling space for accommodating paint is formed between the surface of the product to be filled and the movable mold cavity on the product positioning structure, the movable mold feeding groove and the fixed mold feeding groove can be abutted to form a sealed feeding runner (4), one end of the feeding runner is communicated with one end of the molding cavity, the movable mold cavity is provided with a fixed mold cavity (21), the movable mold cavity and the fixed mold cavity are provided with a flash (5) can be abutted to form a sealed flash cavity (5), the movable mold cavity and the flash bag is also provided with a flash bag (5) which can be abutted to form a sealed flash bag (5), the size of the flash bag is also provided with the sealed flash bag, the flash bag is formed on the movable mold cavity (5), the forming cavity other end and flash buffering cavity one end intercommunication, flash buffering cavity other end and flash package's flash mouth intercommunication, flash buffering cavity one end and forming cavity other end pass through the gentle butt joint of mode of fillet, and the fashioned moulded part in the flash buffering cavity and the lacquer film that the lacquer filling space formed of forming cavity link up gently through the circular arc and form an organic whole structure.
  2. 2. The paint filling mold of claim 1, wherein the volume of the flash bag is 18% -22% of the volume of the paint filling space.
  3. 3. The carbon fiber product paint filling mold as claimed in claim 1, wherein the width of the flash buffer cavity along the paint flowing direction is more than or equal to 20mm.
  4. 4. The carbon fiber product paint filling mold as set forth in claim 1, wherein the product positioning structure in the fixed mold cavity comprises positioning pins (25) in one-to-one correspondence with positioning holes in the product to be painted and a plurality of negative pressure air holes on the surface of the fixed mold cavity, the movable mold cavity is provided with avoiding grooves (16) in one-to-one correspondence with the positioning pins in the fixed mold cavity, the positioning pins can be inserted into the positioning holes in the product to be painted and the avoiding grooves of the movable mold cavity, and the negative pressure air holes are communicated with the negative pressure generating device.
  5. 5. The carbon fiber product paint filling mold of claim 1, wherein a movable mold feed groove, a movable mold cavity, a movable mold flash buffer cavity and a movable mold flash cavity of the movable mold are formed together to form a cavity periphery, a movable mold seal groove (17) is arranged on the periphery of the cavity, a fixed mold feed groove, a fixed mold cavity, a fixed mold flash buffer cavity and a fixed mold flash cavity of the fixed mold are formed together to form a cavity periphery, a fixed mold seal groove (26) is arranged on the periphery of the cavity, the movable mold seal groove is in butt joint with the fixed mold seal groove to form an annular space, and a high-temperature-resistant seal ring is tightly inserted in the annular space.
  6. 6. The carbon fiber product paint filling mold as claimed in claim 3, wherein the movable mold and the fixed mold are positioned at the peripheries of the movable mold sealing groove and the fixed mold sealing groove, and a plurality of movable mold cushions (18) and fixed mold cushions (27) are respectively arranged at the peripheries of the movable mold sealing groove and the fixed mold sealing groove, and the movable mold cushions and the fixed mold cushions are arranged in a one-to-one correspondence manner.
  7. 7. The carbon fiber product paint filling mold of claim 1, wherein guide sleeves (19) are detachably arranged on four corners of the movable mold respectively, guide posts (28) are fixedly arranged on four corners of the fixed mold respectively, the guide posts are slidably inserted into the guide sleeves in one-to-one correspondence, mold locking connecting rods (7) are fixedly arranged on the side walls of the movable mold, and the end parts of the mold locking connecting rods can be fixedly connected with the side walls of the fixed mold through connecting pieces.
  8. 8. A carbon fiber product surface paint filling method using the carbon fiber product paint filling mold as claimed in any one of claims 1 to 7, comprising the steps of: fixing and positioning a product to be painted in a movable mold cavity of a carbon fiber product paint-pouring mold; heating the movable die and the fixed die of the carbon fiber product paint filling die by a heating device; step three, closing the movable mould and the fixed mould of the paint filling mould of the carbon fiber product, filling paint into the forming cavity through the injection nozzle of the vacuum injector, enabling the paint to sequentially flow through a paint filling space and a flash buffer cavity in the forming cavity along a feeding flow channel after entering from a paint filling port, and finally filling a flash bag; step four, maintaining the pressure of the movable die and the fixed die until the paint is dried and shaped; step five, opening the movable mould and taking out the product after paint filling; And step six, positioning the product on processing equipment, starting the processing equipment to cut and remove the paint forming part which is connected to the product and is formed by the flash buffer cavity, the flash package and the feeding flow passage.
  9. 9. The method for surface paint filling processing of carbon fiber products of claim 8, wherein the heating device in the second step keeps the movable die plate of the movable die and the fixed die plate of the fixed die at 80-90 ℃, paint at 65+/-1 ℃ is injected in the third step, the mold is closed and kept for 3-5 minutes in the fourth step, and the redundant paint forming part on the products is removed in the sixth step by adopting a laser cutting mode.

Description

Carbon fiber product paint filling mold and carbon fiber product surface paint filling processing method Technical Field The invention relates to a carbon fiber product processing method, in particular to a carbon fiber product paint filling die and a carbon fiber product surface paint filling processing method. Background At present, automotive interiors are often made of carbon fiber materials, so that the effects of light weight and high strength are achieved, at present, the surface treatment of the carbon fiber materials is mostly carried out by adopting a spraying process, and the effects of uniform thickness, light weight, thinness and attractive appearance are difficult to achieve by spraying paint. The traditional spraying process is replaced by the PUR paint filling technology, so that the surface attractiveness and the production efficiency of a product can be effectively improved, bubbles can be generated in the production process of the PUR paint filling technology due to trapped air, a flash bag is designed in a die in order to discharge the bubbles generated during raw material injection out of a product forming area, the flash bag is located at the tail end of a forming cavity along the flowing direction of paint, a pressure difference is generated between the forming cavity and the flash bag through a die-casting line 8, and the bubbles generated during material injection and partial raw materials are extruded to the flash bag together. However, as the saturation of the flash bag gradually increases, the pressure between the flash bag and the molding cavity gradually decreases, so that part of bubbles cannot be completely discharged out of the molding cavity and enter the flash bag, meanwhile, as paint flows forward in the molding cavity and finally enters the flash bag, the paint is subjected to a reaction force, and part of paint flows reversely and flows out of the flash opening of the flash bag to enter the molding cavity, so that no matter how large the flash bag is designed, part of bubbles remain in the molding cavity, and finally bubbles are formed on the surface of a product close to the flash bag, so that the product is poor. Disclosure of Invention In order to overcome the defects, the invention provides the carbon fiber product paint filling die which can effectively solve the problem that bubbles exist on the surface of one end of a product close to a flash bag and effectively improve the yield of the product. The invention aims to solve the technical problems, and adopts the technical scheme that the carbon fiber product paint filling mold comprises a movable mold, a fixed mold and a heating device, wherein the movable mold can move towards the fixed mold, is arranged on one side of the fixed mold, the heating device can heat the movable mold and the fixed mold respectively, a movable mold cavity, a movable mold feed groove, a paint filling opening and a movable mold flash cavity are formed in the movable mold, the fixed mold is provided with the fixed mold cavity, the fixed mold feed groove and the fixed mold flash cavity, the movable mold cavity and the fixed mold cavity can be in butt joint to form a sealed molding cavity, a product positioning structure capable of stopping and positioning a product to be painted is arranged on the fixed mold cavity, a paint filling space for accommodating paint is formed between the surface of the product to be painted on the product positioning structure and the movable mold cavity, one end of the feed groove is communicated with one end of the molding cavity, the other end of the feed groove is communicated with the paint flash cavity, the movable mold cavity and the fixed mold flash cavity can be in butt joint to form a sealed molding cavity, the flash buffer cavity is also arranged on one side of the movable mold cavity and the other end of the fixed mold cavity is communicated with the overflow buffer cavity, and the overflow buffer cavity is communicated with the other end of the movable mold cavity. As a further improvement of the invention, one end of the flash buffer cavity is gently butted with the other end of the molding cavity in a round angle mode, and a molded part molded in the flash buffer cavity and a paint film formed in a paint filling space of the molding cavity are gently jointed through an arc to form an integrated structure. As a further improvement of the invention, the volume of the flash bag accounts for 18-22% of the volume of the paint filling space. As a further improvement of the invention, the width of the flash buffer cavity along the flowing direction of the paint is more than or equal to 20mm. As a further improvement of the invention, the product positioning structure in the fixed die cavity comprises positioning pins corresponding to the positioning holes on the product to be painted in a one-to-one mode and a plurality of negative pressure air holes positioned on the surface of the fixed die cavity, th