CN-121798873-B - Hot runner glue feeding control method for chair armrest side plate injection mold and mold thereof

Abstract

The invention relates to a hot runner glue feeding control method of a chair armrest side plate injection mold and a mold thereof, and relates to the technical field of injection molds; the method comprises the steps of determining a flow speed threshold, glue feeding time length and glue feeding components corresponding to glue feeding positions according to cavity information, determining glue feeding flow speed by combining product information, the glue feeding components and the glue feeding time length, defining the glue feeding positions corresponding to the glue feeding flow speed larger than the flow speed threshold as exceeding positions, defining the glue feeding positions adjacent to the exceeding positions as adjacent positions, obtaining the adjacent relation of the exceeding positions, correcting the glue feeding flow speed based on the adjacent relation, and controlling an execution unit to operate by combining the corrected glue feeding flow speed and the corrected glue feeding time length. The invention has the effect of avoiding the quality defects of obvious weld marks, local sink marks and the like of products.

Inventors

• Lu Binjun

Assignees

• 台州苏克科技有限公司

Dates

Publication Date

20260508

Application Date

20260312

Claims (8)

1. 1. A hot runner glue feeding control method of a chair armrest side plate injection mold is characterized by comprising the following steps: step 1, responding to a mold closing completion signal, and collecting product information, cavity information and a glue feeding position; step 2, determining a flow speed threshold value, a glue feeding time length and a glue feeding component corresponding to a glue feeding position according to cavity information; step 3, determining the glue feeding flow rate by combining the product information, the glue feeding component and the glue feeding time; Step 4, defining a glue feeding position corresponding to the glue feeding flow rate greater than the flow rate threshold as an out-of-standard position, and defining a glue feeding position adjacent to the out-of-standard position as an adjacent position; step 5, obtaining the adjacent relation of the exceeding position; step 6, correcting the glue feeding flow rate based on the adjacent relation; Step 60, calculating an exceeding standard value according to the glue feeding flow velocity and the flow velocity threshold value corresponding to the exceeding standard position; step 61, if the adjacent relation is that no adjacent exists between the exceeding positions, taking the flow speed threshold value as the glue feeding flow speed of the exceeding positions; step 62, obtaining the adjacent number of the exceeding positions; step 63, correcting the glue feeding flow velocity corresponding to the adjacent positions by combining the adjacent quantity and the exceeding standard value; Step 64, if the adjacent relation is that the adjacent relation exists between the exceeding positions, defining a larger exceeding value in the adjacent exceeding positions as a down-regulating value; Step 65, obtaining the adjacent continuous quantity of the exceeding standard position; Step 66, matching the down-regulating coefficient based on the continuous quantity; Step 67, correcting the glue feeding flow rate by combining the down-regulating value and the down-regulating coefficient; Step 68, correcting the glue feeding time length according to the corrected glue feeding flow rate, product information and glue feeding components; And 7, controlling the execution unit (21) to operate by combining the corrected glue feeding flow rate and the corrected glue feeding time length.
2. 2. The method for controlling the hot runner glue feeding of the injection mold of the chair armrest side plate according to claim 1, wherein the method for correcting the glue feeding flow rate corresponding to the adjacent positions comprises the following steps: step 630, acquiring the flow sectional area between the standard exceeding position and the adjacent position according to the cavity information; Step 631, when the adjacent position is adjacent to only one out-of-standard position, determining an adjacent lower limit based on the glue feeding position; step 632, if the adjacent number is consistent with the adjacent lower limit, summing the glue feeding flow rate at the adjacent position and the exceeding standard value to obtain the corrected glue feeding flow rate; step 6330, if the adjacent number is inconsistent with the adjacent lower limit, calculating the distribution ratio by combining the glue inlet flow velocity and the flow sectional area corresponding to the adjacent position; Step 6331, calculating an allocation value based on the allocation proportion and the superscalar value; Step 6332, summing the glue feeding flow rates of the adjacent positions with the distribution value to obtain corrected glue feeding flow rates.
3. 3. The method for controlling the hot runner glue feeding of the injection mold of the chair armrest side plate according to claim 2, wherein the method for correcting the glue feeding flow rate corresponding to the adjacent positions further comprises the following steps: Step 634, calculating out the total exceeding amount according to the glue feeding flow speed and the flow speed threshold corresponding to the exceeding position when the adjacent position is adjacent to the plurality of exceeding positions; step 635, determining a correction flow rate by combining the total amount exceeding the standard and the glue feeding flow rate at the adjacent position; 636, acquiring pipeline information and coil information when the corrected flow rate is greater than a flow rate threshold; step 637, calculating the out-of-standard speed difference according to the corrected flow rate and the flow rate threshold value; Step 638, determining pulse instructions by combining the glue feeding position, the exceeding speed difference, the pipeline information and the coil information, and synchronously executing the pulse instructions when the execution unit (21) runs, wherein the flow speed threshold value is used as the glue feeding flow speed of the adjacent position.
4. 4. The method for controlling the hot runner glue feeding of the injection mold of the chair armrest side plate according to claim 3, wherein the method for determining the pulse command comprises the following steps: Step 6380, obtaining the outer diameter and the material of the pipeline from the pipeline information, and obtaining the initial position, the inner diameter and the density of the coil from the coil information; step 6381, determining the pulse interval by combining the outer diameter of the pipeline and the inner diameter of the coil; step 6382, determining a correction coefficient according to the pipeline material and the pulse interval; Step 6383, determining a base frequency and a base current based on the superscript speed difference; Step 6384, calculating a target frequency and a target current by combining the base frequency, the base current and the correction coefficient; Step 6385, determining a moving path through the target current, the coil density, the initial position and the glue feeding position; step 6386, integrating the moving path, the target frequency and the target current to determine a pulse command.
5. 5. The method for controlling the hot runner glue feeding of the injection mold for the armrest side plate of the chair according to claim 4, wherein the method for determining the moving path comprises the following steps: Step 6390, determining an alignment path according to the initial position and the glue feeding position; step 6391, determining a coil turn number based on the pipe information, the target current, and the pulse spacing; Step 6392, determining an insertion length by combining the number of turns of the coil and the coil density; step 6393, determining the moving path according to the alignment path and the insertion length.
6. 6. The method for controlling the hot runner molding of the side plate injection mold of the chair armrest according to claim 5, wherein the method for determining the number of turns of the coil comprises the steps of: 63910, acquiring magnetic permeability and target magnetic field strength from pipeline information; step 63911, determining a magnetic field attenuation coefficient according to the pulse interval and the magnetic permeability; Step 63912, determining the total magnetic field requirement by combining the magnetic field attenuation coefficient, the target magnetic field strength and the pulse interval; Step 63913, calculating an efficiency factor according to the magnetic permeability and the target current; step 63914, determining the number of coil turns based on the total amount of magnetic field requirement and the efficiency factor.
7. 7. A chair armrest side plate injection mold controlled by a chair armrest side plate injection mold hot runner glue inlet control method as claimed in any one of claims 1 to 6, comprising a mold body (1) having a molding cavity (11) and a plurality of glue inlet runners (12), characterized by further comprising a flow rate control structure (2) for controlling the flow rate of molten plastic entering the molding cavity (11) through the glue inlet runners (12); One end of the glue inlet flow channel (12) is communicated with the forming cavity (11), and the other end of the glue inlet flow channel (12) is communicated with external feeding equipment; the flow rate control structure (2) comprises an execution unit (21) for regulating and controlling the flow rates of the molten plastics in different glue inlet channels (12) and a control unit (22) for controlling the execution unit (21); The execution unit (21) is arranged at the inlet of the glue inlet flow channel (12), and the control unit (22) is electrically connected with the execution unit (21).
8. 8. The chair armrest side plate injection mold according to claim 7, characterized in that a first core (13) slidingly connected with the mold main body (1) is further arranged in the molding cavity (11), and a core pulling structure (3) for driving the first core (13) to move is further arranged on the mold main body (1); the core pulling structure (3) comprises a first sliding frame (31) arranged on the die main body (1), a first sliding block (32) which is arranged on the first sliding frame (31) in a limiting sliding manner, and a first push-pull unit (33) which is fixedly arranged on the first sliding block (32); the output end of the first push-pull unit (33) is fixedly connected with the die main body (1), and the driving direction of the first push-pull unit (33), the extending direction of the first core (13) and the sliding direction of the first core (13) are the same.

Description

Hot runner glue feeding control method for chair armrest side plate injection mold and mold thereof Technical Field The invention relates to the technical field of injection molds, in particular to a hot runner glue feeding control method of a chair armrest side plate injection mold and a mold thereof. Background The injection mold is used as a core device for mass production of plastic products, is a key carrier for connecting a material formula, a molding process and a terminal product, and the technical level of the injection mold directly determines the molding precision, the production efficiency and the manufacturing cost of the plastic products. Aiming at the side plate of the chair armrest, the injection mold mainstream in the industry at present mostly adopts a glue feeding design with uniform flow rate of multiple feed inlets, wherein a plurality of pouring gates are uniformly arranged in the mold for adapting to a larger molding area, and the runner parameters, heating power and flow rate settings of all the pouring gates are completely consistent. But the chair armrest side plate is used as a special-shaped piece, the different flow speed and pressure requirements of different areas corresponding to the injection mold on melt filling are different, and the method of uniformly feeding the glue through a plurality of feed inlets can lead to unbalanced filling of the molten plastic, so that the quality defects of obvious weld marks, local sink marks and the like of products are caused. Disclosure of Invention In order to avoid quality defects of obvious weld marks, local sink marks and the like of products, the invention provides a hot runner glue feeding control method of a chair armrest side plate injection mold and a mold thereof. In a first aspect, the invention provides a hot runner glue feeding control method for a chair armrest side plate injection mold, which adopts the following technical scheme: a hot runner glue feeding control method of a chair armrest side plate injection mold comprises the following steps: step 1, responding to a mold closing completion signal, and collecting product information, cavity information and a glue feeding position; step 2, determining a flow speed threshold value, a glue feeding time length and a glue feeding component corresponding to a glue feeding position according to cavity information; step 3, determining the glue feeding flow rate by combining the product information, the glue feeding component and the glue feeding time; Step 4, defining a glue feeding position corresponding to the glue feeding flow rate greater than the flow rate threshold as an out-of-standard position, and defining a glue feeding position adjacent to the out-of-standard position as an adjacent position; step 5, obtaining the adjacent relation of the exceeding position; step 6, correcting the glue feeding flow rate based on the adjacent relation; and 7, controlling the operation of the execution unit by combining the corrected glue feeding flow rate and the corrected glue feeding time length. Through adopting above-mentioned technical scheme, gather the multidimensional parameter and confirm velocity of flow threshold and advance the gluey parameter based on the differentiation demand of shaping die cavity, the recognition of rethread superscalar position and the judgement of adjacent relation carry out dynamic correction to advance gluey velocity of flow, realize the accurate adaptation of advance gluey velocity of flow of each advance gluey position, effectively avoid defects such as weld mark obviously, local sink mark that lead to because of the velocity of flow is uneven. Optionally, the method for correcting the glue feeding flow rate according to the adjacent relation comprises the following steps: Step 60, calculating an exceeding standard value according to the glue feeding flow velocity and the flow velocity threshold value corresponding to the exceeding standard position; step 61, if the adjacent relation is that no adjacent exists between the exceeding positions, taking the flow speed threshold value as the glue feeding flow speed of the exceeding positions; step 62, obtaining the adjacent number of the exceeding positions; and 63, correcting the glue feeding flow velocity corresponding to the adjacent positions by combining the adjacent quantity and the exceeding standard value. By adopting the technical scheme, the flow velocity exceeding standard value of the exceeding standard position is quantitatively calculated, the flow velocity of the adjacent position is pertinently corrected according to the adjacent quantity, the reasonable transfer of the exceeding standard value to the regulation and control logic of the adjacent position is realized, and the partial filling defect caused by direct deceleration of the single exceeding standard position is avoided. Optionally, the method for correcting the glue feeding flow rate according to the adjacent relation further c