Limousine trunk lock handle injection mold design

Handle complex injection mold design and manufacturing process: Injection molded parts injection mold structure analysis program analysis → → → Injection Molding Injection molding defect analysis traces the best structure of the program certification and mold strength and rigidity checking → ​​mold three-dimensional modeling and conversion CAD mold manufacturing electronic layout → → mold tryout . In the injection mold design process is how the most difficult form of injection molded parts and injection mold structure analysis program analysis and certification , for which you need to create new theories and techniques.
        Handle physical elements of a comprehensive analysis of injection molding and injection molding method for analyzing the structure of the program is the latest theories and techniques described in this article , these theories and techniques mastered , any complex injection mold design will be easy and enjoyable.
        Analysis limousine trunk lock handle injection mold design is mainly based on the analysis of injection molded parts form a dominant " obstacle " and hidden " obstacle " to the elements , making injection mold injection molded parts using a program oblique ejection mechanism and gear , rack vertical pulling mechanism . The program is based on "type hole and groove " factor injection of shape analysis , using a three level ramp off slider pulling mechanism . The program for the injection of three " obstacle " and three "type hole and groove " element , using the comprehensive analysis of injection mold structure of the program , to be able to solve complex design problems such injection mold . These theories and techniques to solve complex injection mold structure of the program a powerful tool, but also a new injection mold design concepts.
        Exists between the handle and the injection of factor analysis program analysis dialectical relationship that produced by injection molding structural analysis program fully reflects the logic and operability. Once the structure of the program to determine the injection mold , mold design as long as a little basic knowledge and be able to use CAD drawing people to be able to successfully separate the complex injection mold design. These theories can also be applied to other cavity mold designs.
        Handle injection molded parts and body analysis data from the trunk lock lever handle and a round nut components. Material is 30 % glass fiber reinforced polyamide 6 ( Black ) QYSS08-1992; shrinkage rate of 1% ; handle plastic largest projected area 15 114mm2; equipment used XSZY-230 injection molding machine ; net weight 200g, gross weight over 210 grams , plastic injection large .
        1 . Analysis of injection molded parts injection molded body parts "type hole and groove " and " obstacle " factor analysis to find the elements for the handle and plastic parts injection mold structure were analyzed program is very necessary , and only on the product after a thorough analysis of the shape and size of the structure to be able to solve the mold parting line selection, type hole or groove pumping and injection molding core ejection mechanism design and other issues.
        ( 1 ) analysis of injection molded parts handle body "type hole or groove " elements , handles the placement of injection molded parts . Front handle molded parts should be placed on the moving mold , while the back ribbed should be placed on the fixed mold . Positive small square tank φ 24mm × 60 ° cone inside of φ 22mm deep hole 7.7mm ; intermediate cross splined outer diameter hole 19mm, inside diameter 17.5mm, width 8.2mm, length 17mm; below is φ 19mm round hole . Back with four M6 threaded holes ; five φ3mm holes and one hole of 1.5mm φ.
        " -Shaped hole or groove " and the left-side surface (2 ) with the lateral direction of the aperture φ 8mm × 3mm × 20mm and the bore of φ 21.3mm ; right side of the hole with φ 8mm × 43mm and 10mm × 10mm × square hole of 45mm ; after the side 14mm × 22.5 mm × 15.3mm triangular groove .
        2 dominant " obstacle " and hidden " obstacle " element
        Dominant ( 1 ) Handle injection molded parts , " obstacle ", A-A sectional view shown in Figure 1 , in front of the front of the large and small square grooves have 6mm × tan60 ° = 3mm dominant " obstacle " in the D there 6mm × tan10 ° on -D cross-section = 1.06mm dominant " obstacle ." " Obstacle " is present on the mold or product parts can be played hinder mold opening , an entity closed mold and injection molding core-pulling and releasing movement. In Figure 1 A-A and C-C and D-D cross-sectional view of a partial cross-sectional view shown , if the injection of impediment to release it in the opening direction of the mold there is a dominant " obstacle " in .
        ( 2 ) Handle injection molded parts hidden " obstacle ", C-C cross-sectional view shown in Figure 1 , if the mold injection molded parts along the direction of ejection direction 30 ° angle , forming cone inside φ 22mm deep 7.7mm round the core hole is bound to hamper the oblique injection molding mold , core becomes oblique injection mold parts hidden " obstacle ." Analysis of " obstacle " and " type hole or groove " elements and structure of the program of the injection mold injection molded parts according to shape analysis , we can see there are two dominant " obstacle " and a hidden " obstacle on injection molded parts " circumferentially injection molded parts exist three " type hole and groove " on plastic parts , underside , there are still 11 " type hole and groove . " This allows these elements , integrated analysis method of injection mold design , injection mold to determine the structure of the program .
        1 side of the injection of the core institutions of pumping solutions
        Injection molding side there is three "type hole or groove " , can be three levels ramp off slider pulling mechanism to shape.
        2 front and back inserts molded parts program
        11 "type hole and groove " front and back of the injection molded parts , injection molded parts because the handle "shaped hole and groove " to be parallel to the opening and closing direction of the mold , these " type holes and groove " can be used cores or inserts to shaping , re-use of the mold opening and closing motion of the mold core pulling and reset to get . Of course , can also be used vertically Pulling core-pulling mechanism to get .
        ( 1 ) injection of the back of the "type hole and groove " , back injection of 5-φ 3mm and 1-φ -shaped hole of 1.5mm , can be shaped core and core-pulling . Cross-shaped hole in the middle of the spline outer diameter of 19mm, inner diameter of 17.5mm, width 8.2mm, length 17mm , the following is φ 19mm hole and type of hole , it can be shaped core and core-pulling . The four M6 threaded screw holes can be shaped core , remove the artificial injection of stripping before .
        ( 2 ) injection of positive "type hole and groove ", φ 24mm × 60 ° cone inside a φ 22mm 7.7mm deep hole , and the use of a core forming, fixed core will also become molded parts 30 ° oblique release hidden " obstacle ."
        3 motion applications bodies to avoid the " obstacle "
        Application oblique ejection mechanism can avoid dominant " obstacle " to handle injection molding injection molded parts along the open direction of the closed mold release impediment , vertical pulling mechanism can be applied to avoid the injection of hidden " barriers body " diagonal stripping impediment for injection molded parts.
        ( 1 ) Method releasing movement away
        By changing the direction of movement of the release mechanism , there is a dominant " obstacle " effective method of avoiding , as shown in A-A 1 and the D-D cross sectional view of Fig . If the injection of parting direction is the direction of movement of the mold is open the top of the injection molded parts , is bound to encounter 6mm × tan30 ° = 3mm dominant " obstacle " and 6mm × tan10 ° = 1.06mm dominant " obstacle " barrier effect, so that injection molded parts not normally release . In order to allow a smooth plastic mold , ejector mold agencies must follow the dominant " obstacle " ejection direction of 30 ° , in order to effectively avoid the dominant " obstacle " blocking , as shown in Figure 1 CC sectional view of Fig . Meanwhile , φ 24mm × 60 ° cone shape also fits oblique release characteristics of injection molded parts .
        ( 2 ) Pulling movement away from France
        The use of core-pulling mechanism movement, there is a hidden " obstacle " for effective ways to avoid , C-C cross-section in Figure 1 is shown in Fig . Forming φ 24mm × 60 ° cone inside φ 22mm 7.7mm deep hole in the core is injection molded parts oblique release hidden " obstacle " , you can use the vertical gear and rack Pulling core-pulling mechanism to avoid the hidden " obstacle ", only so that it can be 30 ° oblique injection molding mold movement smoothly . Injection mold release oblique and vertical structural analysis and design of injection mold core body pumping analysis shown in Figure 2 .
        1 . Dominant " obstacle "
        Affect the movement of bodies such as stripping away the parting motion analysis in the states: In order to allow a smooth plunger injection molding stripping, stripping agencies must follow the dominant " obstacle " direction of 30 ° top out , in order to effectively avoid the dominant " obstacle " blocking , B-B view is shown in Figure 2 . Injection mold release mechanism is the use of vertical and diagonal structure of the dual release mechanism to effectively solve the problem of injection molded parts oblique release . In order to reduce friction between the double motion release mechanism between the flat plate at both ends of the push plate and inclined shafts and rollers installed , change sliding friction to rolling friction .
        2 recessive " obstacle "
        Impact of pumping motion of the core institutions of view C-C shown in Figure 1 , the φ 24mm × 60 ° cone which has formed φ 22mm 7.7mm deep hole in the core , core-pulling mechanism using vertical core exercise to avoid pumping open recessive " obstacle " before they can be injection molded parts oblique release of 30 ° . Vertical pumping rack with core body move, scheduled to die in the open mold to produce linear motion to move upward with gear rack gear shaft rotation , and thus bring down the core linear movement of the rack to complete φ 22mm 7.7mm deep vertical hole cores Pulling movement. Conversely , moving , when the fixed mold clamping , a core rack reset. The key is to prevent core rack rotating cylindrical pin to prevent rotation of the rack . Structural design structural design handle injection mold injection mold , shown in Figure 2 .
        ( 1 ) Injection molded handle for the two template type mold .
        ( 2 ) direct gate of φ 6mm × 2 °. 6mm diameter gate material after injection of condensate stripping , pulling off the material available and eliminates the need for removal of the sprue slug metalworking .
        ( 3 ) According to the design of plastic material shrinkage of the mold cavity and fixed movable core model , the ribs should be noted that the draft groove pitch and surface roughness of the selected value .
        ( 4 ) the use of the fixed mold the seven core and four inserts, mold opening and closing movement of the mold injection molded parts can be achieved on the back of the hole forming and directional pumping core .
        ( 5 ) the mold left, right and rear three sides of the "type of hole or groove ", using the three sliders off ramp pulling mechanism in order to achieve the type of injection molded parts handle hole or groove molding and core-pulling . One with a rack , the rack gear and core pulling mechanism to achieve vertical injection molding and core- piece , effectively blocking effect of stripping away the hidden " obstacle " to handle oblique injection molded parts . This four have adopted the touch slider bead stopper mechanism and core be the limit .
        ( 6 ) by the movement of the mold release mechanism converts the vertical movement of the ejection mechanism oblique ejection mechanism , the return movement on the one hand by the spring plunger were first reset, on the other hand by the return lever precise reset. Stopper pin stripping mechanism limiting the translational movement of the stroke .
        ( 7 ) fixed , dynamic model of the core ring in the patrol water cooling system, and an O -ring seal plug to prevent water leakage . The core of the non- opening of the channel splitter using the same isolation channel, divided into two halves so that the flow path is formed into the water circulation flow channel structure .
        ( 8 ) fixed , movable mold section with a guide pin guide sleeve and guiding mechanism . Conclusion Undoubtedly, analysis limousine trunk lock handle injection mold design solutions , is a complex mold case scenario analysis . In this paper, a comprehensive analysis of two structural elements and mold for injection molding tools , systems and scientific solution box lock handle injection mold structure design, thus avoiding the failure of injection mold design.
        The text of the injection of shape analysis "two factor " and a comprehensive analysis of the theoretical approach is innovative design of the cavity structure analysis . The comprehensive analysis, only three mold structure analysis method in one . Elements mentioned in the text only in two " five elements " analysis method is easy to see three plastic parts " five elements " and injection mold design is to ensure an effective method of injection mold design success.
        For injection mold design , in addition to master the "Five Elements " and three mold structure analysis methods , but also need to have proof mold structure , the structure is based on the argument mold mold agency determined to check whether the mold can be successfully avoid the "five elements " and complete the entire plastic molding method validation process . In addition, the weak members also need to make the necessary strength and rigidity checking, the only way to ensure complete success of injection mold design.