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CN-122008498-A - Plastic hollow cabinet plate long core-pulling injection molding mold and production and use method thereof

CN122008498ACN 122008498 ACN122008498 ACN 122008498ACN-122008498-A

Abstract

The application relates to a plastic hollow cabinet plate long core-pulling injection molding mold and a production and use method thereof, and relates to the technical field of injection molding molds, wherein the mold comprises a mold substrate with a long core-pulling groove, and the long core-pulling groove penetrates through two ends of the mold substrate; the long core-pulling grooves are correspondingly provided with two core-pulling grooves, the two core-pulling grooves are respectively inserted from two ends of the long core-pulling grooves, the middle part of each long core-pulling groove is provided with a positioning piece for positioning the two core-pulling end parts, and an injection molding channel with uniform width is formed between the core-pulling grooves and the long core-pulling grooves. The application has the effect of improving the qualification rate of the plastic hollow cabinet plate.

Inventors

  • XIE CUNTI

Assignees

  • 台州苏克科技有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. The long core-pulling injection molding mold for the plastic hollow cabinet plate comprises a mold substrate (3) with a long core-pulling groove (31), wherein the long core-pulling groove (31) penetrates through two ends of the mold substrate (3), and is characterized by further comprising a core-pulling (4) movably installed in the long core-pulling groove (31) and a core-pulling driving assembly (5) for driving the core-pulling (4) to be inserted into or withdrawn from the long core-pulling groove (31); Two core pulling grooves (4) are correspondingly arranged in one long core pulling groove (31), and the two core pulling grooves (4) are respectively inserted from two ends of the long core pulling groove (31); The middle part of the long core-pulling groove (31) is provided with positioning pieces (7) for positioning the end parts of the two core-pulling grooves (4), and an injection molding channel (6) with uniform width is formed between the core-pulling grooves (4) and the long core-pulling groove (31).
  2. 2. The long core-pulling injection molding die for the plastic hollow cabinet plate according to claim 1, wherein the positioning piece (7) is provided with T-shaped embedded parts (71), two core-pulling ends (4) are respectively provided with a positioning groove (41) and are abutted to form a positioning cavity (42) for completely embedding the embedded parts (71), and when the embedded parts (71) are positioned in the positioning cavity (42), the circumferential side wall of the core-pulling piece (4) is separated from the inner wall of the long core-pulling groove (31) to form the injection molding channel (6).
  3. 3. A plastic hollow cabinet panel long core pulling injection molding mold according to claim 2, wherein the top of the embedded part (71) is provided with a downward-inclined correcting surface (72), and the positioning groove (41) moves along the inclined correcting surface (72) and abuts against the top of the embedded part (71) to correct the position.
  4. 4. A plastic hollow cabinet plate long core-pulling injection molding mold according to claim 3, wherein the core-pulling driving assembly (5) comprises a core-pulling cylinder (51) and a connecting piece (52), the connecting piece (52) is connected with an output end of the core-pulling cylinder (51) and the core-pulling (4), and the core-pulling cylinder (51) is installed in a forward projection range of the bottom surface of the mold substrate (3).
  5. 5. The production and use method of the plastic hollow cabinet plate long core-pulling injection molding mold is applied to the plastic hollow cabinet plate long core-pulling injection molding mold as claimed in claim 4, and is characterized by comprising the following steps: Product information is called, and product wall thickness information and through hole size information are called from the product information; The method comprises the steps of matching long core pulling groove section information and core pulling section information based on product wall thickness information and through hole size information; Processing the long core-pulling groove (31) of the mold base (3) according to the section information of the long core-pulling groove; Analyzing the through hole size information to determine the position information and the core pulling length information of the positioning piece; defining core-pulling section information and core-pulling length information as core-pulling set information; Determining size information of the positioning piece by combining core pulling set information and long core pulling groove section information; processing the positioning piece (7) according to the positioning piece position information and the positioning piece size information; correcting the core pulling set information by a preset theoretical correction method to obtain core pulling theoretical correction information, and processing the core pulling (4) based on the core pulling theoretical correction information; setting reference experimental environment temperature information, and simulating a production environment by adopting the reference experimental environment temperature information to perform experimental processing on the die.
  6. 6. The method for producing and using the plastic hollow cabinet plate long core-pulling injection molding mold according to claim 5, wherein the method for determining the size information of the positioning piece comprises the following steps: Matching the embedded part position information of the positioning piece (7) according to the positioning groove position information of the positioning groove (41) preset at the end part of the loose core (4); Determining sagging information of a core pulling end according to the core pulling length information and a preset core pulling material; matching inclination dimension information of an inclination correction surface (72) of the embedded part (71) based on core pulling end sagging information; The retainer size information is output based on the embedded portion position information and the inclination size information of the top portion of the embedded portion (71) inclined downward.
  7. 7. The method for producing and using the plastic hollow cabinet plate long core-pulling injection molding die as claimed in claim 5, wherein the theoretical correction method comprises the following steps: a reference temperature value of the molten material is adjusted; matching the thermal expansion coefficient of the core-pulling material according to the reference temperature value of the molten material; Calculating the section thermal expansion amount according to the core-pulling section information and the thermal expansion coefficient; correcting the core-pulling section information based on the section thermal expansion amount to obtain core-pulling section correction information; calculating the length thermal expansion amount according to the core pulling length information and the thermal expansion coefficient; correcting the core pulling length information based on the length thermal expansion amount to obtain core pulling length correction information.
  8. 8. The method for producing and using the plastic hollow cabinet plate long core-pulling injection molding mold according to claim 7, wherein the mold using method for the expansion condition of the core-pulling (4) section comprises the following steps: The total amount of the product materials is prepared; Injecting molten materials which are half of the total amount of the product materials into a mold at a preset injection speed, and collecting core-pulling real-time temperature values after injection is completed; Matching the speed variation according to the core pulling real-time temperature value; correcting the injection speed by the speed variation to slow down the speed of injecting the molten material into the mold, and continuously injecting the molten material into the mold; and when the core pulling real-time temperature value reaches the reference temperature value of the molten material, the rest molten material is fully injected into the mold at the injection speed.
  9. 9. The method for producing and using the plastic hollow cabinet plate long core-pulling injection molding mold according to claim 8, wherein the mold using method for the condition of length expansion of the core-pulling (4) comprises the following steps: setting the mounting position of the interception piece according to the size information of the positioning piece; Installing a preset interception piece at an interception piece installation position, and controlling the interception piece to extend out before molten materials are injected so as to hold the core pulling (4) circumferentially; when the core-pulling real-time temperature value reaches the reference temperature value of the molten material, the interception piece is controlled to retract so that the molten material flows to the abutting positions of the end parts of the two core-pulling cores (4).
  10. 10. The method for producing and using the plastic hollow cabinet plate long core-pulling injection molding mold according to claim 9, further comprising: collecting the actual temperature of the molten material and the reaction force value of the cylinder; When the actual temperature of the molten material is larger than the reference temperature value of the molten material, calculating a difference value between the actual temperature of the molten material and the reference temperature value of the molten material, and defining the difference value as an exceeding temperature difference value; Determining a length excess value according to the excess temperature difference value, the thermal expansion coefficient and the core pulling length information; When the reaction force value of the cylinder is larger than 0, collecting the bending deformation quantity of the core pulling; Setting a deformation proportion, and determining a deformation allowance based on the deformation proportion and product wall thickness information; and if and only if the core pulling bending deformation amount is larger than the deformation allowable amount, controlling the cylinder to retract based on the length excess value.

Description

Plastic hollow cabinet plate long core-pulling injection molding mold and production and use method thereof Technical Field The invention relates to the field of injection molding dies, in particular to a plastic hollow cabinet plate long core-pulling injection molding die and a production and use method thereof. Background Most of the plastic hollow cabinet plates are of thin-wall plate structures, through holes are needed to be formed in the two ends of the plastic hollow cabinet plates to meet the use requirements of assembly, weight reduction or ventilation and the like, and the forming quality of the plastic hollow cabinet plates directly determines the structural stability and the service life of products, so that strict requirements are put forward on the precision and the reliability of injection molding dies. The through hole forming of the plastic hollow cabinet plate mainly depends on the long core-pulling injection molding technology, the conventional long core-pulling injection molding mold mostly adopts a single integral core-pulling structure, namely a long core-pulling groove is formed in the mold body in a penetrating mode, a single integral core-pulling is installed in the long core-pulling groove in a moving mode, and the single integral core-pulling is driven to move by a cylinder. Because the through hole length of the plastic hollow cabinet plate is longer, the corresponding core pulling length is increased along with the through hole length, and the phenomenon that the end of a single core pulling piece sags easily under the action of self gravity, so that the width of an injection molding channel between the core pulling piece and a mold cavity is uneven, and further the through hole wall thickness deviation of the plastic hollow cabinet plate is overlarge, and the product percent of pass is greatly reduced. Disclosure of Invention In order to improve the qualification rate of the plastic hollow cabinet plate, the invention provides a plastic hollow cabinet plate long core-pulling injection molding die and a production and use method thereof. In a first aspect, the invention provides a plastic hollow cabinet plate long core-pulling injection molding die, which adopts the following technical scheme: The long core-pulling injection molding mold for the plastic hollow cabinet plate comprises a mold substrate with long core-pulling grooves, core-pulling driving assemblies, a core-pulling driving assembly and a control mechanism, wherein the long core-pulling grooves penetrate through two ends of the mold substrate; two core pulling grooves are correspondingly formed in one long core pulling groove, and the two core pulling grooves are respectively inserted from two ends of the long core pulling groove; The middle part of the long core-pulling groove is provided with a positioning piece for positioning two core-pulling end parts, and an injection molding channel with uniform width is formed between the core-pulling groove and the long core-pulling groove. By adopting the technical scheme, the core pulling device is divided into two core pulling devices and is respectively driven by one core pulling driving assembly, so that the length value of a single core pulling device is shortened to reduce the deformation amount when the core pulling device enters the long core pulling groove, and meanwhile, the locating piece is arranged in the middle of the long core pulling groove and is used for locating the core pulling devices on two sides, so that the core pulling device can be in a preset position when the core pulling device enters the long core pulling groove, and the gap between the core pulling device and the long core pulling groove is ensured to be uniform. Optionally, the positioning piece is provided with a T-shaped embedded part, the two loose core end parts are respectively provided with a positioning groove, the two end parts are abutted to form a positioning cavity for the embedded part to be completely embedded, and when the embedded part is positioned in the positioning cavity, the circumferential side wall of the loose core is separated from the inner wall of the long loose core groove to form the injection molding channel. Through adopting above-mentioned technical scheme, after two loose core get into long groove of loosing core, the setting element can be to loosing core and fix a position for can just right when two loose core butt, and guarantee to loose core and long clearance between the groove of loosing core evenly. Optionally, the top of the embedded part is provided with a downward-inclined correcting surface, and the positioning groove moves along the inclined correcting surface and abuts against the top of the embedded part to correct the position. Through adopting above-mentioned technical scheme, the border of constant head tank can remove along the slope correcting face when the long groove of loosing core entering, and the end of loosing core is in the horizont