Automobile glove box injection molding method and mold

Abstract

The present application relates to a kind of automobile glove box injection molding method and mould, it is related to injection molding technical field, it includes: collection injection molding demand specification;Based on the specification length value of each side of automobile glove box of injection molding demand specification, specification thickness value and specification material are retrieved;Determine thickness limit length threshold value in combination with specification thickness value and specification material, and determine cooling bending estimated value and bending position point according to the comparison situation of thickness limit length threshold value and specification length value;Determine bending auxiliary length value in combination with specification length value and bending position point, and select injection auxiliary specification in combination with cooling bending estimated value;Based on injection auxiliary specification, corresponding injection auxiliary plate is selected, and based on bending position point, injection auxiliary plate is installed on first mobile assembly;Control first mobile assembly and second mobile assembly to carry out operation with preset injection control scheme to carry out injection.The present application has the effect of improving the finished product quality of automobile glove box injection molding.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and in particular to an injection molding method and mold for an automotive glove box. Background Technology

[0002] Injection molding, also known as injection molding, is the most mainstream plastic processing technology. The principle is to heat and melt thermoplastic / thermosetting plastic granules in the barrel of an injection molding machine, inject them into a closed mold cavity under high pressure and high speed through a screw, hold the pressure, cool and solidify, and then eject them from the mold to obtain a plastic product with the same shape as the mold.

[0003] The automotive glove box is a storage compartment located below the dashboard in front of the passenger side of a car. Currently, automotive glove boxes are generally manufactured using injection molding. The injection mold for an automotive glove box includes a fixed mold and a moving mold. The moving mold shapes the inner cavity of the glove box, while the fixed mold shapes the outer surface. After the fixed and moving molds are closed, thermoplastic material is injected into the cavity between the fixed and moving molds, and then cooled and solidified to obtain the automotive glove box.

[0004] Because automotive glove boxes are large, thin-walled, long, deep-cavity shells with an asymmetrical structure, the material is prone to shrinkage during the cooling and shaping process. This can cause the injection-molded automotive glove box to bend, resulting in a lower quality finished product. Summary of the Invention

[0005] In order to improve the quality of the finished product of injection molding of automotive glove boxes, the present invention provides an injection molding method and mold for automotive glove boxes.

[0006] In a first aspect, the present invention provides a method for injection molding an automotive glove box, employing the following technical solution: A method for injection molding an automotive glove box includes: Collect the injection molding requirements specifications for automotive glove boxes; Based on the injection molding requirements, retrieve the length, thickness, and material specifications for each side of the automotive glove box. The thickness limit length threshold is determined by combining the specified thickness value and the specified material, and the cooling bending estimate and bending location are determined by comparing the thickness limit length threshold with the specified length value. The bending auxiliary length value is determined by combining the specification length value and the bending location point, and the injection molding auxiliary specification is selected by combining the cooling bending estimate; Select the corresponding injection auxiliary plate based on the injection auxiliary specifications, and install the injection auxiliary plate on the preset first moving component based on the bending position point; The first moving component and the preset second moving component are controlled to operate according to a preset injection molding control scheme to perform injection molding.

[0007] By adopting the above technical solution, the injection molding requirements of the automotive glove box are collected, and the length, thickness and material of the specifications are retrieved to determine the estimated value of cooling bending and the bending position. After selecting the injection molding auxiliary specifications, the corresponding injection molding auxiliary plate is installed on the preset first moving component for injection molding, so that the automotive glove box is bent in the opposite direction before cooling, thereby offsetting the bending caused by cooling, and thus improving the quality of the finished product of the injection molded automotive glove box.

[0008] Optional methods for determining the estimated value of cooling bending and the bending location include: Determine whether the specified length value is less than the thickness limit length threshold; If so, the midpoint of the length is determined based on the specified length value, and the midpoint of the length is used as the bending point. The preset bending reference value is output and used as the cooling bending estimate. If not, calculate the ratio between the specified length value and the thickness limit length threshold and use it as the length ratio value; The number of bending positions is determined based on the length ratio. Based on the number of bending positions, the corresponding positions are selected from the specified length values ​​and used as the specified selection position points; The single-position bending estimate is determined by combining the number of bending positions with the specification length value, and the single-position bending estimate is used as the cooling bending estimate. The specification selection position point is used as the bending position point.

[0009] By adopting the above technical solution, it is determined whether the specified length value is less than the thickness limit length threshold. When it is less, the middle position of the length is determined as the bending position point, and the preset bending reference value is output as the cooling bending estimate. When it is not less, the length ratio value is calculated to determine the number of bending positions, and then the specified position point is selected as the bending position point. Combined with the determination of the single-position bending estimate as the cooling bending estimate, this avoids excessive intervention in small sizes and ensures accurate identification of multiple bending points in large sizes, thus improving the rationality of cooling bending estimate.

[0010] Optionally, the methods for selecting the location point for specification selection include: Calculate the quotient between the specified length value and the number of bend locations, and use it as the average length value for the number of bends. The average location point is determined based on the average length of the number of bends. Determine the midpoint based on the specified length value; Calculate the distance between the median point and the average point and sort them to determine the relative sort value; The corresponding width value is retrieved from the injection molding requirement based on the length value; Calculate the ratio between the specified width value and the average length of the number of bends, and use this as the length-to-width ratio. The position adjustment value is determined by combining the aspect ratio and the relative sorting value; The average position point is adjusted based on the position adjustment value to obtain the adjusted position point, and the adjusted position point is used as the position point for specification selection.

[0011] By adopting the above technical solution, the average position point is determined based on the average length value of the number of bends, and the intermediate position point is determined by the specification length value. Then, the relative sorting value is determined. By retrieving the specification width value and calculating the length-to-width ratio value, and then combining it with the determined position adjustment value, the average position point is adjusted to obtain the specification selection position point, thereby improving the accuracy of multi-bend point positioning.

[0012] Optionally, methods for determining the position adjustment value include: The sorting criterion value is determined based on the number of bending positions; Calculate the difference between the relative sort value and the sorting reference value and use it as the sorting deviation value; Determine the sorting adjustment coefficient based on the sorting deviation value; Calculate the product of the aspect ratio and the sorting adjustment factor, and use it as the position adjustment value.

[0013] By adopting the above technical solution, the sorting reference value is determined based on the number of bending positions and the sorting deviation value is calculated. Then, the sorting adjustment coefficient is determined. By using the product between the length-width ratio value and the sorting adjustment coefficient as the position adjustment value, the bending points at different sorting positions can obtain offset correction that matches their arrangement order, thereby further optimizing the installation position accuracy of the injection molding auxiliary plate.

[0014] Optional methods for determining the single-location bending estimate include: Calculate the product between the number of bending locations and the thickness-limited length threshold, and use it as the overall thickness-limited length value; Calculate the difference between the thickness-limited comprehensive length value and the specified length value, and use it as the length deviation value; Calculate the quotient between the length deviation value and the number of bending positions, and use it as the bending position deviation value; Determine the thickness deviation coefficient by combining the specified thickness value with the specified material; Calculate the product between the bending position deviation value and the thickness deviation coefficient, and use it as the estimated value of bending at a single position.

[0015] By adopting the above technical solution, the comprehensive length value of the thickness limit is calculated, and then the bending position deviation value is calculated to determine the thickness deviation coefficient. The product between the bending position deviation value and the thickness deviation coefficient is used as the single-position bending estimate. This allows the calculation of the single-position bending estimate to take into account both the influence of thickness on the degree of bending and the deviation distribution between multiple bending positions, thereby enabling the output of differentiated bending estimates for glove box products with different wall thicknesses.

[0016] Optionally, methods for determining the bending auxiliary length value include: Determine the end position point of the specification based on the specified length value; Calculate the distance between the bending point and the specification end point and use it as the bending end distance value; Determine whether the distance to the bent end is less than the preset end reference distance value; If so, calculate the product between the bending end distance value and the preset end distance reference coefficient and use it as the bending auxiliary length value; If not, calculate the distance between adjacent bend locations and use it as the bend adjacent distance value; Calculate the product between the adjacent bending distance value and the preset adjacent bending distance reference coefficient, and use it as the bending auxiliary length value.

[0017] By adopting the above technical solution, the end position point of the specification is determined and the distance value of the bending end is calculated. Then, it is judged whether the distance value of the bending end is less than the preset end reference distance value. When it is less than the preset end reference distance value, the product value between the bending end distance value and the end distance reference coefficient is used as the bending auxiliary length value. When it is not less than the preset end reference distance value, the adjacent bending distance value is calculated and the product value between the adjacent bending distance value and the end distance reference coefficient is used as the bending auxiliary length value. This allows the determination of the bending auxiliary length value to adapt to different situations where the bending point is at the end or inside, avoiding insufficient support due to the auxiliary length being too short or interference due to the auxiliary length being too long, thus improving the rationality of the auxiliary structure.

[0018] Optional methods for selecting injection molding auxiliary specifications include: Determine if the value of each bending position is greater than 1; If so, the location type is determined based on the bending location point; Calculate the quotient between the bending auxiliary length value and the cooling bending estimate, and use it as the bending ratio coefficient; The material type is determined by combining the location type and the bending ratio coefficient; Based on the material type, bending auxiliary length value, and cooling bending estimate, the injection molding auxiliary specifications are obtained from a preset specification database. If not, the injection molding auxiliary specifications are obtained by matching the bending auxiliary length value with the cooling bending estimate from the preset specification database.

[0019] By adopting the above technical solution, the system determines whether the number of bending positions is greater than 1. When it is greater than 1, the position type is identified and the bending ratio coefficient is calculated. Then, the material type is determined, and finally, the injection molding auxiliary specifications are matched from the specification database based on the material type, the bending auxiliary length value, and the cooling bending estimate. When the number of bending positions is not greater than 1, the injection molding auxiliary specifications are matched directly from the specification database based on the bending auxiliary length value and the cooling bending estimate. This approach takes into account the different needs of single-point bending and multi-point bending, and improves the flexibility and specificity of selecting injection molding auxiliary specifications.

[0020] Optional methods for determining the type of material include: The type of bending ratio adaptation is determined based on the bending ratio coefficient. Determine if the location type is a preset edge type; If so, the bending ratio adaptation type will be used as the material type; If not, the curved position point corresponding to the position type will be taken as the internal position point; Retrieve cooling location points based on internal location points; Calculate the distance between the internal location point and the cooling location point and use it as the cooling distance value; The comprehensive adaptation type is determined by combining the cooling distance value and the bending ratio adaptation type, and the comprehensive adaptation type is used as the material type.

[0021] By adopting the above technical solution, the bending ratio adaptation type is determined, and then it is judged whether the position type is a preset edge type. When it is a preset edge type, the bending ratio adaptation type is used as the material type. When it is not, the internal position point is defined and the cooling position point is retrieved. Then the cooling distance value is calculated and combined with the bending ratio adaptation type to determine the comprehensive adaptation type as the material type. This allows the injection auxiliary plate material at the internal bending point to be optimized secondary according to the actual cooling distance, effectively solving the influence of uneven cooling in the internal area on the bending suppression effect.

[0022] Optional methods for determining the comprehensive adaptation categories include: Determine the cooling baseline distance value based on the estimated cooling bending value; Calculate the ratio between the cooling distance value and the cooling reference distance value and use it as the cooling deviation ratio. Based on the bending ratio, the type of cooling coefficient is retrieved. Determine whether the cooling deviation ratio is less than the type cooling coefficient; If so, the bending ratio adaptation type will be used as the comprehensive adaptation type; If not, the cooling adaptation type is determined based on the cooling deviation ratio, and the cooling adaptation type is used as the comprehensive adaptation type.

[0023] By adopting the above technical solution, the cooling reference distance value is determined and the cooling deviation ratio value is calculated. Then, the type cooling coefficient is retrieved. By judging whether the cooling deviation ratio value is less than the type cooling coefficient, if it is less, the bending ratio matching type is used as the comprehensive matching type. If it is not less, the cooling matching type is determined and used as the comprehensive matching type. This allows the material selection at the internal bending point to dynamically match the actual deviation of the cooling distance, avoiding material over- or under-performance, and achieving a balance between cooling effect and cost control.

[0024] Secondly, the present invention provides an injection molding die for an automotive glove box, which adopts the following technical solution: An injection mold for an automotive glove box, applied to an injection molding method for an automotive glove box as described in any one of the first aspects, comprising: The lower mold is used to form the first outer side of the automotive glove box; The upper mold is disposed on the lower mold and is used to form the second outer side of the automotive glove box; The first movable component slides on the lower mold to form the inner side of the automotive glove box; The second moving component slides symmetrically on the lower mold to form the third and fourth outer sides of the automotive glove box.

[0025] By adopting the above technical solution, the glove box of an automobile is injection molded through the cooperation between the first moving component, the second moving component, the lower mold, and the upper mold. The movement of the first moving component and the second moving component facilitates the unloading of the glove box. Furthermore, by setting an injection molding auxiliary plate on the first moving component, the glove box of the automobile is bent in the opposite direction before cooling, thereby counteracting the bending caused by cooling and improving the quality of the finished product of the injection molded glove box of the automobile.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: 1. Collect the injection molding requirements of the automotive glove box, and retrieve the length, thickness and material specifications to determine the estimated value of cooling bending and the bending location. Then, select the injection auxiliary specifications and install the corresponding injection auxiliary plate on the preset first moving component for injection molding. This allows the automotive glove box to bend in the reverse direction before cooling, thereby offsetting the bending caused by cooling and improving the quality of the finished product of the injection molded automotive glove box. 2. The system determines whether the specified length value is less than the thickness limit length threshold. If it is less, the system determines the midpoint of the length as the bending point and outputs the preset bending reference value as the cooling bending estimate. If it is not less, the system calculates the length ratio value to determine the number of bending points, selects the specified selection point as the bending point, and combines this with the determination of the single-position bending estimate as the cooling bending estimate. This avoids excessive intervention in small sizes while ensuring accurate identification of multiple bending points in large sizes, thus improving the rationality of cooling bending estimates. 3. The average position point is determined based on the average length of the number of bends, and the intermediate position point is determined by the specified length value. Then, the relative sorting value is determined. The length-to-width ratio is calculated by retrieving the specified width value and then adjusting the average position point in combination with the determined position adjustment value to obtain the specified selection position point, thereby improving the accuracy of multi-bend point positioning. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the injection molding mold for an automotive glove box; Figure 2 This is an exploded diagram of an injection mold for an automotive glove box. Figure 1 ; Figure 3 This is an exploded diagram of an injection mold for an automotive glove box. Figure 2 ; Figure 4 This is a flowchart of the injection molding process for automotive glove boxes.

[0028] The parts referred to by the numbers in the above attached figures are as follows: 1. Lower mold; 2. Upper mold; 3. First moving component; 4. Second moving component. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] Reference Figure 1 , Figure 2 and Figure 3This invention discloses an injection molding die for an automotive glove box, comprising a lower die 1, an upper die 2, a first movable component 3, and a second movable component 4. The lower die 1 is used to form the first outer side of the automotive glove box, and the upper die 2 is mounted on the lower die 1 and used to form the second outer side of the automotive glove box. The first movable component 3 is slidably mounted on the lower die 1 and is used to form the inner side of the automotive glove box. The second movable component 4 is symmetrically slidably mounted on the lower die 1 and is used to form the third and fourth outer sides of the automotive glove box. A cavity is formed between the lower die 1, the upper die 2, the first movable component 3, and the second movable component 4, thereby facilitating the injection molding of the automotive glove box. The first and second outer sides are arranged opposite each other, as are the third and fourth outer sides.

[0031] Reference Figure 1 , Figure 2 and Figure 3 Both the first moving component 3 and the second moving component 4 include an injection-molded abutment part and a driving component. The injection-molded abutment part is manufactured by the operator according to actual needs. The driving component can be a linear guide rail, a hydraulic cylinder, or a pneumatic cylinder, thereby facilitating the movement of the injection-molded abutment part.

[0032] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the method embodiments described later, and will not be repeated here.

[0033] Reference Figure 4 Based on the same inventive concept, embodiments of the present invention provide an injection molding method for an automotive glove box, comprising: S100: Collect the injection molding requirements for automotive glove boxes.

[0034] Among them, the injection molding requirements specifications refer to the set of injection molding process-related parameters such as the size, material type, and surface roughness of the automotive glove box.

[0035] Injection molding requirements are obtained after being pre-entered by the operator.

[0036] S101: Based on the injection molding requirements, retrieve the length, thickness, and material specifications of each side of the automotive glove box.

[0037] The specified length values ​​refer to the dimensions along the length of each side of the automotive glove box. The specified thickness values ​​refer to the dimensions along the thickness of each side of the automotive glove box. Injection molding requirements include both the specified length and thickness values ​​for each side of the automotive glove box.

[0038] The length and thickness values ​​of each side of the automotive glove box are retrieved based on the injection molding requirements to facilitate subsequent use.

[0039] S102: Determine the thickness limit length threshold by combining the specified thickness value and the specified material, and determine the cooling bending estimate and bending location point based on the comparison between the thickness limit length threshold and the specified length value.

[0040] The thickness-limited length threshold refers to the maximum length of each side of the automotive glove box that will not bend or deform under specified thickness conditions. The cooling bending estimate refers to the bending thickness value corresponding to the maximum bending point on each side of the automotive glove box. The bending location point refers to the location point on each side of the automotive glove box that corresponds to the cooling bending.

[0041] By inputting the specified material and thickness values ​​into a preset length threshold database, a thickness-limited length threshold is obtained. Then, the comparison between the thickness-limited length threshold and the specified length values ​​is analyzed to determine the estimated cooling bending value and the bending location, facilitating subsequent use.

[0042] The length threshold database pre-stores different thickness values ​​and corresponding thickness-limited length thresholds for materials such as PP (polypropylene), PC / ABS (polycarbonate / acrylonitrile-butadiene-styrene copolymer alloy), and ABS (acrylonitrile-butadiene-styrene copolymer). The smaller the shrinkage rate of the material and the larger the thickness value, the larger the corresponding thickness-limited length threshold. The length threshold database is obtained by injection molding different materials and thickness values ​​under the same injection molding process parameters, collecting the maximum length without bending, and using this as the thickness-limited length threshold.

[0043] S103: Determine the bending auxiliary length value by combining the specification length value and the bending location point, and select the injection molding auxiliary specification by combining the cooling bending estimate.

[0044] The bending auxiliary length value refers to the effective support length of the injection molding auxiliary plate. The injection molding auxiliary specifications refer to the set of parameters such as the size and material specifications of the injection molding auxiliary plate. The injection molding auxiliary plate is installed on the outer side of the first moving component 3 according to actual needs. The injection molding auxiliary plate bends the various sides of the automotive glove box to counteract or compensate for the cooling bending deformation that occurs on the various sides of the automotive glove box.

[0045] By combining the length values ​​and bending locations, the bending auxiliary length value is determined. Furthermore, by combining the bending auxiliary length value with the cooling bending estimate, the injection molding auxiliary specifications can be selected for convenient subsequent use.

[0046] S104: Select the corresponding injection auxiliary plate based on the injection auxiliary specifications, and install the injection auxiliary plate on the preset first moving component 3 based on the bending position point.

[0047] Specifically, the corresponding injection molding auxiliary plate is selected according to the injection molding auxiliary specifications, and the injection molding auxiliary plate is installed on the bending position points corresponding to each side of the first moving component 3.

[0048] S105: Control the first moving component 3 and the preset second moving component 4 to operate according to the preset injection molding control scheme to perform injection molding.

[0049] The injection molding control scheme refers to the set of control commands used to control the movement of the first moving component 3 and the second moving component 4 during the injection molding of an automotive glove box. The injection molding control scheme is obtained after pre-input by the operator.

[0050] The injection molding control scheme controls the operation of the first moving component 3 and the second moving component 4 to perform injection molding on the automotive glove box. The injection molding auxiliary plate installed on the first moving component 3 causes the automotive glove box to bend in the opposite direction before cooling, thereby counteracting the bending caused by cooling and improving the quality of the finished product of the injection-molded automotive glove box.

[0051] To further ensure the rationality of the cooling bending estimate and bending location, it is necessary to perform further separate analysis and calculation on the cooling bending estimate and bending location, which will be explained in detail through the steps shown below.

[0052] The method for estimating the cooling bending value and determining the bending location includes the following steps: S200: Determine whether the specified length value is less than the thickness limit length threshold. If yes, proceed to S201; if no, proceed to S202.

[0053] Specifically, by comparing the specified length values ​​of each side of the automotive glove box with the thickness limit length threshold, it can be determined whether injection molding auxiliary plates need to be installed on each side of the automotive glove box.

[0054] S201: Determine the midpoint of the length based on the specified length value, and use the midpoint of the length as the bending point. Output the preset bending reference value as the cooling bending estimate.

[0055] The midpoint of the length refers to the position corresponding to the middle position according to the specified length value. The bending reference value refers to the bending thickness value when no bending assistance is required. The bending reference value is set by the operator according to actual needs. In this embodiment, the bending reference value is set to 0.

[0056] When the specified length value is less than the thickness limit threshold, it means that bending will not occur, and there is no need to set the injection molding auxiliary plate. Therefore, the middle length of the specified length value is calculated, and the position point corresponding to the middle length and middle width of the side corresponding to the specified length value is retrieved and used as the middle position point of the length. Then, the middle position point of the length is used as the bending position point, and the preset bending reference value is output as the cooling bending estimate, so as to facilitate subsequent use.

[0057] S202: Calculate the ratio between the specified length value and the thickness limit length threshold and use it as the length ratio value.

[0058] The length ratio value refers to the ratio between the specified length value and the thickness limit length threshold.

[0059] When the specified length value is not less than the thickness limit length threshold, it indicates that bending will occur, which means that an injection molding auxiliary plate needs to be set. Therefore, the length ratio value is calculated for convenient subsequent use.

[0060] S203: Determine the number of bending positions based on the length ratio.

[0061] The number of bending positions refers to the total number of bending position points that need to be set along the length of this side.

[0062] When the length ratio is less than 1, 1 is used as the number of bending positions. When the length ratio is not less than 1, the integer part of the length ratio is used as the number of bending positions, which facilitates subsequent use.

[0063] S204: Select the corresponding position from the specified length value based on the number of bending positions and use it as the specified selection position point.

[0064] Among them, the specification selection location point refers to the specific coordinate point selected in the length direction corresponding to the specification length value on a certain side of the car glove box.

[0065] The average length of the specification value is calculated by taking the values ​​of the bending positions, and the position points corresponding to each average length are used as the specification selection positions for convenient subsequent use.

[0066] S205: Combine the number of bending positions with the length value of the specification to determine the estimated value of bending at a single position, and use the estimated value of bending at a single position as the estimated value of bending under cooling conditions, and use the selected position point of the specification as the bending position point.

[0067] Among them, the single-location bending estimate refers to the bending thickness value corresponding to each location point.

[0068] By combining the numerical values ​​of bending locations with the length values ​​of specifications, the estimated value of bending at a single location is determined. This estimated value of bending at a single location is then used as the estimated value of cooling bending, and the selected location points of specifications are used as bending location points, thereby improving the accuracy of the obtained estimated value of cooling bending and bending location points.

[0069] To further ensure the rationality of the selected location points for specifications, it is necessary to perform further separate analysis and calculation on the selected location points, which will be explained in detail through the steps shown below.

[0070] The method for selecting the location point for specification selection includes the following steps: S300: Calculate the quotient between the specified length value and the number of bend locations, and use it as the average length value for the number of bends.

[0071] The average length value of the number of bends refers to the quotient between the specified length value and the number of bend locations.

[0072] Calculating the average length of the number of bends facilitates subsequent use.

[0073] S301: Determine the average location point based on the average length value of the number of bends.

[0074] The average position point refers to the specific position coordinate point selected in the length direction corresponding to the specified length value according to the averaging method.

[0075] By using the average length of the number of bends and the coordinates of the corresponding side of the middle width as the average position point, it is convenient to use in subsequent operations.

[0076] S302: Determine the intermediate position point based on the specified length value.

[0077] The intermediate position point refers to the specific coordinate point corresponding to the middle length along the length direction of the specified length value.

[0078] The intermediate length is calculated based on the specified length value, and the coordinates of the intermediate length and the intermediate width on the corresponding side are taken as the intermediate position point for convenient use later.

[0079] S303: Calculate the distance between the intermediate position point and the average position point and sort them to determine the relative sort value.

[0080] The relative sort value refers to the sort value corresponding to the relative position sorting of each average position point.

[0081] The distance between the intermediate point and the average point is calculated, and the results are sorted from smallest to largest. The sorted results are then used as relative sorting values ​​for easy use later.

[0082] S304: Retrieve the corresponding width value from the injection molding requirement based on the length value.

[0083] The specification width value refers to the dimension in the width direction of the side of the automotive glove box corresponding to the specification length value. Injection molding requirements include the specification width value.

[0084] By retrieving the width value corresponding to the length value from the injection molding requirements, it is convenient to use it later.

[0085] S305: Calculate the ratio between the specified width value and the average length of the number of bends, and use it as the length-to-width ratio.

[0086] The length-to-width ratio refers to the ratio between the specified width and the average length of the number of bends.

[0087] Calculating the aspect ratio makes it easier to use later.

[0088] S306: Determine the position adjustment value by combining the aspect ratio and the relative sorting value.

[0089] The position adjustment value refers to the distance adjustment value corresponding to the need to adjust the position point.

[0090] By combining the aspect ratio and relative sorting values, the position adjustment value is determined to facilitate subsequent use.

[0091] S307: Adjust the average position point based on the position adjustment value to obtain the adjusted position point, and use the adjusted position point as the specification selection position point.

[0092] The adjusted position point refers to the position point corresponding to the average position point after adjustment.

[0093] By adjusting the average position point according to the position adjustment value, and using the adjusted position point as the adjustment position point, and then using the adjustment position point as the specification selection position point, the accuracy of the obtained specification selection position point is improved.

[0094] To further ensure the rationality of the position adjustment value, it is necessary to perform a further separate analysis and calculation on the position adjustment value, which will be explained in detail through the steps shown below.

[0095] The method for determining the position adjustment value includes the following steps: S400: Determine the sorting benchmark value based on the number of bending positions.

[0096] The sorting baseline value refers to the baseline sorting value that does not require adjustment.

[0097] By inputting the number of bend positions into a preset sorting benchmark database, a sorting benchmark value is obtained for subsequent use. The larger the number of bend positions, the larger the corresponding sorting benchmark value.

[0098] The sorting benchmark database pre-stores a table that maps different bending positions to their corresponding sorting benchmark values. The sorting benchmark database is pre-set by the operator according to actual needs.

[0099] For example, the sorting benchmark database can be set such that when the number of bend positions is less than 3, the sorting benchmark value is set to 1; when the number of bend positions is greater than 3 and less than 5, the sorting benchmark value is set to 2; and when the number of bend positions is greater than 5, the sorting benchmark value is set to 3.

[0100] S401: Calculate the difference between the relative sort value and the sorting reference value and use it as the sorting deviation value.

[0101] The sorting deviation value refers to the difference between the relative sorting value and the sorting reference value.

[0102] Calculating the sorting deviation value facilitates subsequent use.

[0103] S402: Determine the sorting adjustment coefficient based on the sorting deviation value.

[0104] Among them, the sorting adjustment coefficient refers to the coefficient used to scale and control the position adjustment of the average position point.

[0105] The sorting deviation value is input into a preset sorting adjustment calculation formula to calculate the sorting adjustment coefficient, which facilitates subsequent use. The larger the sorting deviation value, the larger the corresponding sorting adjustment coefficient.

[0106] The formula for calculating the sorting adjustment is: Sorting adjustment coefficient = 1 + (sorting deviation value - 1) * 0.1.

[0107] S403: Calculate the product of the aspect ratio and the sorting adjustment coefficient and use it as the position adjustment value.

[0108] Specifically, the accuracy of the obtained position adjustment value is improved by calculating the product between the aspect ratio and the sorting adjustment coefficient, and using the calculation result as the position adjustment value.

[0109] To further ensure the reasonableness of the single-location bending estimate, it is necessary to perform a further separate analysis and calculation on the single-location bending estimate, which will be explained in detail through the steps shown below.

[0110] The method for determining the estimated value of bending at a single location includes the following steps: S500: Calculate the product between the number of bending locations and the thickness limit length threshold, and use it as the overall thickness limit length value.

[0111] The thickness-limited comprehensive length value refers to the total length after adding up the thickness-limited lengths of each bending position under the current number of bending positions.

[0112] The product of the number of bending locations and the thickness limit length threshold is calculated, and the result is used as the comprehensive thickness limit length value for convenient subsequent use.

[0113] S501: Calculate the difference between the thickness limit composite length value and the specification length value and use it as the length deviation value.

[0114] The length deviation value refers to the difference between the thickness-limited comprehensive length value and the specified length value.

[0115] Calculating the length deviation value facilitates subsequent use.

[0116] S502: Calculate the quotient between the length deviation value and the number of bending positions and use it as the bending position deviation value.

[0117] Among them, the bending position deviation value refers to the average length deviation distributed at each bending position point when there are multiple bending position points.

[0118] The quotient between the length deviation value and the number of bending positions is calculated, and the calculation result is used as the bending position deviation value for convenient subsequent use.

[0119] S503: Determine the thickness deviation coefficient by combining the specified thickness value and the specified material.

[0120] The thickness deviation coefficient refers to the intensity of the influence of the actual wall thickness relative to the standard wall thickness on the degree of cooling bending deformation.

[0121] By inputting the specified thickness value and the specified material into a preset thickness deviation database, a thickness deviation coefficient is obtained for convenient subsequent use.

[0122] The thickness deviation database pre-stores a lookup table of different thickness values, material specifications, and their corresponding thickness deviation coefficients. The database is retrieved by the operator through input. The larger the thickness value, the larger the corresponding thickness deviation coefficient.

[0123] S504: Calculate the product between the bending position deviation value and the thickness deviation coefficient and use it as the estimated value of bending at a single position.

[0124] Specifically, the accuracy of the obtained single-position bending estimate is improved by calculating the product between the bending position deviation value and the thickness deviation coefficient, and using the calculation result as the single-position bending estimate.

[0125] To further ensure the rationality of the bending auxiliary length value, it is necessary to perform a further separate analysis and calculation on the bending auxiliary length value, which will be explained in detail through the steps shown below.

[0126] The method for determining the bending auxiliary length value includes the following steps: S600: Determine the end position point of the specification based on the specification length value.

[0127] Among them, the specification end position point refers to the coordinate position point at both ends of the length direction corresponding to the specification length value on a certain side of the car glove box.

[0128] By using the two ends of the side corresponding to the specified length value and the position points corresponding to the middle width as the specification end position points, it is convenient for subsequent use.

[0129] S601: Calculate the distance between the bending location point and the specification end location point and use it as the bending end distance value.

[0130] The distance value at the bent end refers to the distance between the bending location and the end location of the specification.

[0131] Calculating the distance at the curved end facilitates subsequent use.

[0132] S602: Determine whether the distance value at the bent end is less than the preset end reference distance value. If yes, proceed to S603; if no, proceed to S604.

[0133] The end reference distance value refers to the critical distance threshold used to determine if the bending point is too close to the side of the automotive glove box. The end reference distance value is preset by the operator according to actual needs.

[0134] By judging whether the distance value of the bent end is less than the preset end reference distance value, it can be determined whether the bending position is too close to the end area of ​​the side of the car glove box.

[0135] S603: Calculate the product between the bending end distance value and the preset end distance reference coefficient and use it as the bending auxiliary length value.

[0136] The end distance reference coefficient refers to the coefficient that converts the bending end distance value into the actual bending auxiliary length value when near the end. The end distance reference coefficient is preset by the operator according to actual needs and is between 0 and 1. In this embodiment, the end distance reference coefficient can be set to 0.5.

[0137] When the distance to the bent end is less than the preset end reference distance, it indicates that the bending position is too close to the end area of ​​the side of the car glove box. Therefore, the product of the distance to the bent end and the preset end distance reference coefficient is calculated, and the calculation result is used as the bending auxiliary length value to improve the accuracy of the obtained bending auxiliary length value.

[0138] S604: Calculate the distance between adjacent bend locations and use it as the bend adjacent distance value.

[0139] Among them, the adjacent bending distance value refers to the distance between adjacent bending location points.

[0140] When the distance between the bent ends is not less than the preset end reference distance, it means that the bending position is far from the end area of ​​the side of the car glove box. Therefore, the adjacent distance values ​​of the bend are calculated for convenient use later.

[0141] S605: Calculate the product between the adjacent bending distance value and the preset adjacent bending distance reference coefficient and use it as the bending auxiliary length value.

[0142] The adjacent distance reference coefficient refers to the coefficient that converts the distance value of the bent end to the actual bending auxiliary length value when it is far from the end. The adjacent distance reference coefficient is preset by the operator according to actual needs, and the adjacent distance reference coefficient is between 0 and 1. In this embodiment, the adjacent distance reference coefficient can be set to 0.3.

[0143] The accuracy of the obtained bending auxiliary length value is improved by calculating the product between the adjacent bending distance value and the preset adjacent distance reference coefficient, and using the calculation result as the bending auxiliary length value.

[0144] To further ensure the rationality of injection molding auxiliary specifications, it is necessary to perform further separate analysis and calculation on the injection molding auxiliary specifications, which will be explained in detail through the steps shown below.

[0145] The selection method for injection molding auxiliary specifications includes the following steps: S700: Determine if the number of bending positions is greater than 1. If yes, proceed to S701; if no, proceed to S705.

[0146] The method involves determining whether the number of bending positions is greater than 1, thereby determining whether the specifications can be selected directly based on the bending auxiliary length value and the cooling bending estimate.

[0147] S701: Determine the location type based on the bending location point.

[0148] Among them, the location type refers to the category based on the relative distribution of the bending location points along the length of the side of the car glove box. The location types include edge type and interior type.

[0149] When the number of bending positions is greater than 1, it indicates that the specification cannot be directly selected based on the bending auxiliary length value and the cooling bending estimate. Therefore, the bending position point is compared with the specification end position point. When the bending position point is one of the two position points closest to the specification end position point, the preset edge type is output as the position type. When the bending position point is not one of the two position points closest to the specification end point, the preset interior type is output as the position type.

[0150] S702: Calculate the quotient between the bending auxiliary length value and the cooling bending estimate and use it as the bending ratio coefficient.

[0151] The bending ratio coefficient refers to the ratio between length and thickness.

[0152] The quotient between the bending auxiliary length value and the cooling bending estimate is calculated, and the calculation result is used as the bending ratio coefficient for convenient subsequent use.

[0153] S703: Determine the material type by combining the location type and the bending ratio coefficient.

[0154] The material type refers to the type of material used in the injection molding auxiliary plate.

[0155] By combining the analysis of location type and bending ratio coefficient, the material type can be determined, which facilitates subsequent use.

[0156] S704: Based on the material type, bending auxiliary length value and cooling bending estimate, the injection molding auxiliary specification is obtained by matching from the preset specification database.

[0157] The specification database refers to a pre-stored database containing different material types, bending auxiliary length values, cooling bending estimates, and corresponding injection molding auxiliary specifications. The specification database is retrieved after pre-entry by the operator.

[0158] By inputting the material type, bending auxiliary length value, and cooling bending estimate into a preset specification database to obtain injection molding auxiliary specifications, the injection molding auxiliary plate is made of a material with a thermal expansion coefficient greater than or equal to that of the mold cavity steel. This results in greater expansion during heating and injection molding, thereby providing stronger reverse shrinkage compensation force during cooling and improving the accuracy of the obtained injection molding auxiliary specifications.

[0159] S705: Based on the bending auxiliary length value and the cooling bending estimate, the injection molding auxiliary specification is obtained from the preset specification database.

[0160] When the number of bending positions is no more than 1, it means that the specifications can be selected directly based on the bending auxiliary length value and the cooling bending estimate. Therefore, the bending auxiliary length value and the cooling bending estimate are input into the preset specification database to match and obtain the injection molding auxiliary specifications, thereby improving the accuracy of the obtained injection molding auxiliary specifications.

[0161] To further ensure the appropriateness of the material type, it is necessary to conduct a more detailed analysis and calculation of the material type separately, which will be explained in detail through the steps shown below.

[0162] The method for determining the type of material includes the following steps: S800: Determine the type of bending ratio adaptation based on the bending ratio coefficient.

[0163] Among them, the bending ratio matching type refers to the material category corresponding to the injection molding auxiliary plate when it conforms to the bending ratio coefficient.

[0164] By inputting the bending ratio coefficient into a preset type database, the bending ratio matching type can be obtained, which facilitates subsequent use.

[0165] The category database pre-stores a table of different bending ratio coefficients and corresponding bending ratio matching categories, which is obtained after the operator pre-inputs the data.

[0166] S801: Determine whether the location type is a preset edge type. If yes, proceed to S802; if no, proceed to S803.

[0167] Specifically, by determining whether the position type is a preset edge type, it can be determined whether the bending ratio adaptation type can be used directly.

[0168] S802: Use the bending ratio adaptation type as the material type.

[0169] When the location type is the preset edge type, it means that the bending ratio adaptation type can be used directly. Therefore, the bending ratio adaptation type is used as the material type to improve the accuracy of the obtained material type.

[0170] S803: Use the bending point corresponding to the position type as the internal position point.

[0171] Among them, the internal location point refers to the curved location point located inside.

[0172] When the location type is not the preset edge type, it means that the curvature ratio adaptation type cannot be used directly. Therefore, the internal location points are defined to facilitate subsequent use.

[0173] S804: Retrieves cooling location points based on internal location points.

[0174] Among them, the cooling location point refers to the reference coordinate point that is closest to a certain internal location point in the spatial layout of the cooling water system in the injection mold of the automotive glove box.

[0175] The internal location points are input into the preset mold design model and adjacent cooling location points are retrieved for convenient subsequent use.

[0176] The mold design model is obtained by the operator in advance by creating a three-dimensional model of the mold and the layout of the cooling water channels within it.

[0177] S805: Calculate the distance between the internal location point and the cooling location point and use it as the cooling distance value.

[0178] The cooling distance value refers to the distance between the internal location point and the cooling location point.

[0179] Calculating the cooling distance value facilitates subsequent use.

[0180] S806: Combine the cooling distance value and the bending ratio to determine the comprehensive adaptation type, and use the comprehensive adaptation type as the material type.

[0181] Among them, the comprehensive compatibility type refers to the material category that comprehensively meets the cooling and bending ratio coefficients.

[0182] By combining the cooling distance value with the bending ratio adaptation type, a comprehensive adaptation type is determined, and this comprehensive adaptation type is used as the material type, thereby improving the accuracy of the obtained material type.

[0183] To further ensure the rationality of the comprehensive adaptation categories, it is necessary to conduct further separate analysis and calculation on the comprehensive adaptation categories, which will be explained in detail through the steps shown below.

[0184] The method for determining the comprehensive compatibility category includes the following steps: S900: Determine the cooling baseline distance value based on the estimated cooling bending value.

[0185] The cooling reference distance value refers to the maximum or standard distance that can be tolerated between the internal bending point and the cooling point under normal cooling conditions.

[0186] The cooling bending estimate is input into a preset cooling reference distance database to obtain a matching cooling reference distance value, facilitating subsequent use. The larger the cooling bending estimate, the smaller the corresponding cooling reference distance value.

[0187] The cooling baseline distance database pre-stores a lookup table of different estimated cooling bend values ​​and their corresponding cooling baseline distance values. The cooling baseline distance database is preset by the operator.

[0188] For example, the cooling reference distance database can be set as follows: when the estimated cooling bending value is less than 0.5 mm, the cooling reference distance value is set to 20 mm; when the estimated value is greater than 0.5 mm and less than 0.8 mm, the reference distance value is set to 15 mm; and when the estimated value is greater than 0.8 mm, the reference distance value is set to 10 mm.

[0189] S901: Calculate the ratio between the cooling distance value and the cooling reference distance value and use it as the cooling deviation ratio.

[0190] Among them, the cooling deviation ratio is a numerical parameter that quantifies the degree of deviation of the current cooling conditions from the standard cooling conditions.

[0191] The ratio between the cooling distance value and the cooling reference distance value is calculated, and the calculation result is used as the cooling deviation ratio value for convenient subsequent use.

[0192] S902: Adjust the cooling coefficient of the type based on the bending ratio.

[0193] Among them, the type cooling coefficient refers to the tolerance threshold of the material type to the deviation of cooling distance under standard cooling conditions.

[0194] By adjusting the bending ratio to match the type, the corresponding cooling coefficient can be retrieved for convenient subsequent use.

[0195] S903: Determine whether the cooling deviation ratio is less than the type cooling coefficient. If yes, proceed to S904; if no, proceed to S905.

[0196] In this process, the ability to adapt to the cooling distance deviation is determined by whether the cooling deviation ratio is less than the type of cooling coefficient.

[0197] S904: The bending ratio adaptation type is used as the comprehensive adaptation type.

[0198] When the cooling deviation ratio is less than the type cooling coefficient, it means that the bending ratio matching type can adapt to the deviation of the cooling distance. Therefore, the bending ratio matching type is used as the comprehensive matching type to improve the accuracy of the obtained comprehensive matching type.

[0199] S905: Determine the cooling adapter type based on the cooling deviation ratio and use the cooling adapter type as the comprehensive adapter type.

[0200] Among them, the cooling compatibility type refers to the material category that meets the cooling deviation ratio value.

[0201] When the cooling deviation ratio is not less than the type cooling coefficient, it means that the bending ratio matching type cannot adapt to the cooling distance deviation. Therefore, the cooling deviation ratio is input into the preset type database to match and obtain the cooling matching type, and the cooling matching type is used as the comprehensive matching type to improve the accuracy of the obtained comprehensive matching type.

[0202] The category database pre-stores a table of different cooling deviation ratios and their corresponding cooling adaptation categories. The category database is obtained after the operator pre-inputs the values.

[0203] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for injection molding an automotive glove box, characterized in that, include: Collect the injection molding requirements specifications for automotive glove boxes; Based on the injection molding requirements, retrieve the length, thickness, and material specifications for each side of the automotive glove box. The thickness limit length threshold is determined by combining the specified thickness value and the specified material, and the cooling bending estimate and bending location are determined by comparing the thickness limit length threshold with the specified length value. The bending auxiliary length value is determined by combining the specification length value and the bending location point, and the injection molding auxiliary specification is selected by combining the cooling bending estimate; Select the corresponding injection auxiliary plate based on the injection auxiliary specifications, and install the injection auxiliary plate on the preset first moving component (3) based on the bending position point; Control the first moving component (3) and the preset second moving component (4) to operate according to the preset injection molding control scheme to perform injection molding.

2. The injection molding method for an automotive glove box according to claim 1, characterized in that, The methods for estimating the bending value and determining the bending location include: Determine whether the specified length value is less than the thickness limit length threshold; If so, the midpoint of the length is determined based on the specified length value, and the midpoint of the length is used as the bending point. The preset bending reference value is output and used as the cooling bending estimate. If not, calculate the ratio between the specified length value and the thickness limit length threshold and use it as the length ratio value; The number of bending positions is determined based on the length ratio. Based on the number of bending positions, the corresponding positions are selected from the specified length values ​​and used as the specified selection position points; The single-position bending estimate is determined by combining the number of bending positions with the specification length value, and the single-position bending estimate is used as the cooling bending estimate. The specification selection position point is used as the bending position point.

3. The injection molding method for an automotive glove box according to claim 2, characterized in that, The methods for selecting the location point for specification selection include: Calculate the quotient between the specified length value and the number of bend locations, and use it as the average length value for the number of bends. The average location point is determined based on the average length of the number of bends. Determine the midpoint based on the specified length value; Calculate the distance between the median point and the average point and sort them to determine the relative sort value; The corresponding width value is retrieved from the injection molding requirement based on the length value; Calculate the ratio between the specified width value and the average length of the number of bends, and use this as the length-to-width ratio. The position adjustment value is determined by combining the aspect ratio and the relative sorting value; The average position point is adjusted based on the position adjustment value to obtain the adjusted position point, and the adjusted position point is used as the position point for specification selection.

4. The injection molding method for an automotive glove box according to claim 3, characterized in that, The methods for determining the position adjustment value include: The sorting criterion value is determined based on the number of bending positions; Calculate the difference between the relative sort value and the sorting reference value and use it as the sorting deviation value; Determine the sorting adjustment coefficient based on the sorting deviation value; Calculate the product of the aspect ratio and the sorting adjustment factor, and use it as the position adjustment value.

5. The injection molding method for an automotive glove box according to claim 2, characterized in that, Methods for determining the estimated value of bending at a single location include: Calculate the product between the number of bending locations and the thickness-limited length threshold, and use it as the overall thickness-limited length value; Calculate the difference between the thickness-limited comprehensive length value and the specified length value, and use it as the length deviation value; Calculate the quotient between the length deviation value and the number of bending positions, and use it as the bending position deviation value; Determine the thickness deviation coefficient by combining the specified thickness value with the specified material; Calculate the product between the bending position deviation value and the thickness deviation coefficient, and use it as the estimated value of bending at a single position.

6. The injection molding method for an automotive glove box according to claim 2, characterized in that, Methods for determining the bending auxiliary length value include: Determine the end position point of the specification based on the specified length value; Calculate the distance between the bending point and the specification end point and use it as the bending end distance value; Determine whether the distance to the bent end is less than the preset end reference distance value; If so, calculate the product between the bending end distance value and the preset end distance reference coefficient and use it as the bending auxiliary length value; If not, calculate the distance between adjacent bend locations and use it as the bend adjacent distance value; Calculate the product between the adjacent bending distance value and the preset adjacent bending distance reference coefficient, and use it as the bending auxiliary length value.

7. The injection molding method for an automotive glove box according to claim 6, characterized in that, The methods for selecting injection molding auxiliary specifications include: Determine if the value of each bending position is greater than 1; If so, the location type is determined based on the bending location point; Calculate the quotient between the bending auxiliary length value and the cooling bending estimate, and use it as the bending ratio coefficient; The material type is determined by combining the location type and the bending ratio coefficient; Based on the material type, bending auxiliary length value, and cooling bending estimate, the injection molding auxiliary specifications are obtained from a preset specification database. If not, the injection molding auxiliary specifications are obtained by matching the bending auxiliary length value with the cooling bending estimate from the preset specification database.

8. The injection molding method for an automotive glove box according to claim 7, characterized in that, Methods for determining material types include: The type of bending ratio adaptation is determined based on the bending ratio coefficient. Determine if the location type is a preset edge type; If so, the bending ratio adaptation type will be used as the material type; If not, the curved position point corresponding to the position type will be taken as the internal position point; Retrieve cooling location points based on internal location points; Calculate the distance between the internal location point and the cooling location point and use it as the cooling distance value; The comprehensive adaptation type is determined by combining the cooling distance value and the bending ratio adaptation type, and the comprehensive adaptation type is used as the material type.

9. The injection molding method for an automotive glove box according to claim 8, characterized in that, The methods for determining the comprehensive compatibility categories include: Determine the cooling baseline distance value based on the estimated cooling bending value; Calculate the ratio between the cooling distance value and the cooling reference distance value and use it as the cooling deviation ratio. Based on the bending ratio, the type of cooling coefficient is retrieved. Determine whether the cooling deviation ratio is less than the type cooling coefficient; If so, the bending ratio adaptation type will be used as the comprehensive adaptation type; If not, the cooling adaptation type is determined based on the cooling deviation ratio, and the cooling adaptation type is used as the comprehensive adaptation type.

10. An injection mold for an automotive glove box, characterized in that, An injection molding method for an automotive glove box as described in any one of claims 1 to 9, comprising: Lower mold (1) is used to form the first outer side of the automotive glove box; The upper mold (2) is set on the lower mold (1) and is used to form the second outer side of the car glove box; The first moving component (3) slides on the lower mold (1) to form the inner side of the car glove box; The second moving component (4) slides symmetrically on the lower mold (1) to form the third and fourth outer sides of the automotive glove box.

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