Ejecting and discharging structure of injection mold

Abstract

The utility model provides an ejection discharging structure of an injection mold, and relates to the technical field of injection molds. The lower part of the mounting rack is fixedly connected with a fixed seat; the top end face of the fixing base is symmetrically and fixedly connected with two guide sliding rails. The front end surface of the fixed seat is fixedly connected with a lower mold; an upper mold is connected into the two guide sliding rails in a sliding manner; the positions of the upper die and the lower die are aligned; the top end surface of the lower mold is fixedly connected with a model shell; a mold cavity is formed in the center of the bottom end surface of the upper mold; the positions of the model cavity and the model shell are aligned; an injection hole is formed in the center of the top end surface of the mold cavity in a penetrating manner. And along with the movement of the upper mold, the two cut-off tools are closed through a series of transmission to cut off the residual injection molding material in the injection hole, so that the problems that due to the influence of solidification of the residual injection molding material in the injection hole, the molded injection molding part is easy to pull during ejection and unloading, and appearance defects such as scratches and pits appear on the surface of the injection molding part are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially relates to injection mold ejection unloading structure. BACKGROUND

[0002] In the process of using injection mold, in order to facilitate the unloading of the formed injection part, the staff usually uses injection mold ejection unloading structure, and the existing injection mold ejection unloading structure is usually composed of a fixed rack, an upper mold, a lower mold, a driving cylinder, a unloading cylinder and an unloading plate, in the process of using, after the completion of injection part, the upper mold and the lower mold are parted by starting the driving cylinder, then the unloading plate pushes out the formed injection part by starting the unloading cylinder, and the ejection unloading is completed.

[0003] For example: the utility model discloses a kind of injection molding machine with quick unloading and cooling mold, specifically including support leg, rack, injection mechanism, mold body, fixed frame, second hydraulic cylinder, second piston rod, guide rod, discharge port, conveying belt, slag outlet and collection box, the top of the support leg is installed with the rack, the side of the rack top is installed with the mold body, and the other side of rack top is welded with fixed frame, the middle part of one side of the fixed frame is fixedly installed with second hydraulic cylinder, the output end of the second hydraulic cylinder is connected with the second piston rod, the fixed frame is movably assembled with guide rod above and below the second piston rod. The injection molding machine with quick unloading and cooling mold, by the cooperation of trigger plate, guide rod, second spring and sliding block, when the movable die and static die are demoulded, the injection port of static die can be cut off, so that the situation of drawing silk is avoided, and the production quality of product is ensured.

[0004] However, as for the current traditional injection mold ejection unloading structure, since injection hole is connected with model cavity, affected by the solidification of residual injection plastic in injection hole, resistance will be generated in the process of opening mold, which is easy to cause the formed injection part to be stuck in model cavity, at this time, ejection unloading is easy to cause the formed injection part to be pulled, resulting in scratches, depressions and other appearance defects on the surface of injection part, affecting the quality of product, and use is more inconvenient. UTILITY MODEL CONTENTS

[0005] Therefore, the injection mold ejection and unloading structure has the cutting knife capable of automatically cutting off the residual injection plastic in the injection hole during the ejection and unloading process, the control rack drives the control gear to rotate with the movement of the upper mold, the control screw is driven to rotate in the process of rotation of the control gear, the guide sliding plate is driven to move in the process of rotation of the control screw, the first transmission rack is driven to move in the process of movement of the guide sliding plate, the transmission gear meshing with the first transmission rack is driven to rotate in the process of movement of the first transmission rack, the fixed rotating shaft is driven to rotate in the process of rotation of the transmission gear, and the second transmission rack is driven to move in the process of rotation of the transmission gear, and the two cutting knives are closed to cut off the residual injection plastic in the injection hole with the movement of the second transmission rack.

[0006] The utility model provides an injection mold ejection and unloading structure, specifically includes: the installation frame, the lower part fixed connection of installation frame has a fixed seat, the top end surface of fixed seat is fixedly connected with two guide sliding rails, the front end surface of fixed seat is fixedly connected with a lower mold, the upper mold is slidably connected in two guide sliding rails, the position of upper mold and lower mold is in alignment, the top end surface of lower mold is fixedly connected with a model shell, the bottom end surface of upper mold is centrally provided with a model cavity, the position of model cavity and model shell is in alignment, the top end surface of model cavity is centrally provided with an injection hole, the upper part bolt fastening of installation frame is connected with a drive cylinder, the end of drive cylinder output shaft is fixedly connected with a connecting frame, and the upper mold is fixedly connected at the bottom end surface of connecting frame.

[0007] Optionally, the top end surface of the lower mold is fixedly connected with two connecting columns; the top end surface of the two connecting columns is fixedly connected with a control rack; the upper mold is rotatably connected with two control screws; the outer part of the two control screws is fixedly connected with a control gear; the two control gears are meshed with the two control racks, respectively.

[0008] Optionally, the outer part of the two control screws is threadedly connected with a guide sliding plate; the two guide sliding plates are slidably connected in the upper mold; the outer part of the two guide sliding plates is fixedly connected with a first transmission rack.

[0009] Optionally, the inner side of the two first transmission racks is meshed with a transmission gear; the upper mold is rotatably connected with two fixed rotating shafts; the two transmission gears are fixedly connected in the two fixed rotating shafts, respectively.

[0010] Optionally, the outer side of the two transmission gears is meshed with a second transmission rack; the two second transmission racks are slidably connected in the upper mold; the end of the two second transmission racks is fixedly connected with a cutting knife; the two cutting knives are slidably connected in the injection hole.

[0011] Optionally, a lifting slide is slidably connected in the lower mold; a top end surface of the lifting slide is fixedly connected with a center unloading plate; the unloading plate is aligned with the position of the mold shell; the top end surface of the lifting slide is fixedly connected with two symmetrical control plates; the bottom end surface of the lifting slide is fixedly connected with a plurality of groups of connecting springs; and the tail ends of the plurality of groups of connecting springs are fixedly connected in the lower mold.

[0012] Advantages

[0013] In the demolding process, the connecting spring is rebounded to drive the lifting slide to reset, the unloading plate is ejected from the mold shell, the injection molding part is automatically ejected and unloaded, and the practicability of the injection mold ejection and unloading structure is effectively improved.

[0014] The control rack also drives the control gear to rotate, then drives the transmission gear to rotate through a series of transmissions, drives the fixed rotating shaft to rotate in the process of rotating the transmission gear, drives the second transmission rack to move in the process of rotating the transmission gear, the two cutting knives are closed to cut off the residual injection material in the injection hole, the surface of the injection molding part is prevented from being damaged by the residual material, the defective rate is reduced, the labor intensity of the workers is reduced, the convenience of the injection mold ejection and unloading structure is effectively improved, and the use is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments will be briefly introduced below.

[0016] In the drawings:

[0017] Figure 1 is the axonometric structure schematic view of the utility model.

[0018] Figure 2 is the axonometric structure schematic view of the utility model when demolding.

[0019] Figure 3 is the cross-sectional structure schematic view of the lower mold of the utility model.

[0020] Figure 4 is the cross-sectional structure schematic view of the upper mold of the utility model.

[0021] Figure 5 is the axonometric structure schematic view of the control screw rod of the utility model.

[0022] LIST OF REFERENCE NUMERALS

[0023] 1, mounting rack; 101, fixed seat; 102, guide slide rail; 103, lower mold; 104, upper mold; 105, connecting frame; 106, drive cylinder; 107, model shell; 108, model cavity; 109, injection hole; 110, lifting carriage; 111, connecting spring; 112, unloading plate; 113, control pressure plate; 114, connecting column; 115, control rack; 116, control screw; 117, control gear; 118, guide slide plate; 119, first transmission rack; 120, fixed rotating shaft; 121, transmission gear; 122, second transmission rack; 123, cutting knife. DETAILED DESCRIPTION

[0024] In order to make the purpose, scheme and advantages of the technical scheme of the utility model clearer, the technical scheme of the utility model embodiment will be described clearly and completely in the following with reference to the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0025] Embodiment one:

[0026] The utility model proposes injection mold ejection unloading structure, please refer to Figures 1 to 5 , comprising: mounting rack 1;

[0027] The lower part of mounting rack 1 is fixedly connected with a fixed seat 101;The top end of fixed seat 101 is fixedly connected with two guide slide rails 102 symmetrically;The front end of fixed seat 101 is fixedly connected with a lower mold 103;Two guide slide rails 102 are slidably connected with an upper mold 104;The position of upper mold 104 and lower mold 103 is aligned;The top end of lower mold 103 is fixedly connected with a model shell 107;The bottom end of upper mold 104 is centrally provided with a model cavity 108;The position of model cavity 108 and model shell 107 is aligned;The top end of model cavity 108 is centrally provided with an injection hole 109;The upper part of mounting rack 1 is bolted and connected with a drive cylinder 106;The end of drive cylinder 106 output shaft is fixedly connected with a connecting frame 105;Upper mold 104 is fixedly connected to the bottom end of connecting frame 105.

[0028] The top end of lower mold 103 is fixedly connected with two connecting columns 114 symmetrically;The top end of two connecting columns 114 is fixedly connected with a control rack 115;Upper mold 104 is rotatably connected with two control screws 116 symmetrically;The outside of two control screws 116 is fixedly connected with a control gear 117;Two control gears 117 are engaged with two control racks 115 respectively.

[0029] The outer part of the two control screws 116 is threadedly connected with a guide sliding plate 118; the two guide sliding plates 118 are slidingly connected in the upper mold 104; the outer part of the two guide sliding plates 118 is fixedly connected with a first transmission rack 119.

[0030] The inner side of the two first transmission racks 119 is engaged with a transmission gear 121; the upper mold 104 is symmetrically rotatably connected with two fixed rotating shafts 120; the two transmission gears 121 are respectively fixedly connected in the two fixed rotating shafts 120.

[0031] The outer side of the two transmission gears 121 is engaged with a second transmission rack 122; the two second transmission racks 122 are slidingly connected in the upper mold 104; the end of the two second transmission racks 122 is fixedly connected with a cutting knife 123; the two cutting knives 123 are slidingly connected in the injection hole 109.

[0032] The specific use and role of the embodiment are as follows: in the demolding process, the connecting frame 105 is driven to move by starting the driving cylinder 106, the upper mold 104 is moved along the guide rail 102, the injection molding part is demolded, and the control rack 115 drives the control gear 117 to rotate with the movement of the upper mold 104, the control screw 116 is driven to rotate in the process of rotation of the control gear 117, the guide sliding plate 118 is driven to move in the process of rotation of the control screw 116, the first transmission rack 119 is driven to move in the process of movement of the guide sliding plate 118, the transmission gear 121 engaged with the first transmission rack 119 is driven to rotate in the process of movement of the first transmission rack 119, the fixed rotating shaft 120 is driven to rotate in the process of rotation of the transmission gear 121, and the second transmission rack 122 is driven to move in the process of rotation of the transmission gear 121, and the two cutting knives 123 are closed to cut off the residual injection material in the injection hole 109 with the movement of the second transmission rack 122.

[0033] Embodiment two:

[0034] On the basis of embodiment one, please refer to Figures 1 to 3 , comprising: a lifting carriage 110, a connecting spring 111, a discharging plate 112 and a control pressure plate 113, a lifting carriage 110 is slidingly connected in the lower mold 103; the top end surface of the lifting carriage 110 is fixedly connected with a discharging plate 112 in the middle; the discharging plate 112 is in alignment with the position of the model shell 107; the top end surface of the lifting carriage 110 is fixedly connected with two control pressure plates 113 in symmetry; the bottom end surface of the lifting carriage 110 is fixedly connected with multiple groups of connecting springs 111; the end of the multiple groups of connecting springs 111 is fixedly connected in the lower mold 103.

[0035] The specific use and role of the embodiment are as follows: when the mold is closed, the upper mold 104 will press the control pressing plate 113, so that the control pressing plate 113 drives the lifting carriage 110 to slide in the lower mold 103 and extrude the connecting spring 111, and the discharging plate 112 is received in the mold shell 107; when the mold is opened, the movement of the upper mold 104 makes the connecting spring 111 rebound to drive the lifting carriage 110 to reset, so that the discharging plate 112 ejects the molded injection-molded part from the mold shell 107.

[0036] In this paper, the following points need attention:

[0037] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0038] 2. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0039] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An ejection and unloading structure for injection molds, including: Mounting frame (1); a fixed base (101) is fixedly connected to the lower part of the mounting frame (1); characterized in that two guide rails (102) are symmetrically fixedly connected to the top surface of the fixed base (101); a lower mold (103) is fixedly connected to the front surface of the fixed base (101); an upper mold (104) is slidably connected inside the two guide rails (102); the upper mold (104) and the lower mold (103) are aligned; a model shell is fixedly connected to the top surface of the lower mold (103). (107); A model cavity (108) is provided in the center of the bottom end face of the upper mold (104); The model cavity (108) is aligned with the model shell (107); An injection hole (109) is provided in the center of the top end face of the model cavity (108); A drive cylinder (106) is bolted to the upper part of the mounting frame (1); A connecting frame (105) is fixedly connected to the end of the output shaft of the drive cylinder (106); The upper mold (104) is fixedly connected to the bottom end face of the connecting frame (105).

2. The injection mold ejection and unloading structure as described in claim 1, characterized in that: The top surface of the lower mold (103) is symmetrically and fixedly connected to two connecting columns (114); the top surface of each of the two connecting columns (114) is fixedly connected to a control rack (115); the upper mold (104) is symmetrically and rotatably connected to two control screws (116); the outside of each of the two control screws (116) is fixedly connected to a control gear (117); the two control gears (117) mesh with the two control racks (115) respectively.

3. The injection mold ejection and unloading structure as described in claim 2, characterized in that: Both control screws (116) are threaded to a guide plate (118); both guide plates (118) are slidably connected inside the upper mold (104); both guide plates (118) are fixedly connected to a first transmission rack (119).

4. The injection mold ejection and unloading structure as described in claim 3, characterized in that: A transmission gear (121) meshes with the inner side of each of the two first transmission racks (119); two fixed shafts (120) are symmetrically rotatably connected inside the upper mold (104); the two transmission gears (121) are respectively fixedly connected inside the two fixed shafts (120).

5. The injection mold ejection and unloading structure as described in claim 4, characterized in that: A second transmission rack (122) is meshed on the outer side of each of the two transmission gears (121); both second transmission racks (122) are slidably connected in the upper mold (104); a cutter (123) is fixedly connected to the end of each of the two second transmission racks (122); both cutters (123) are slidably connected in the injection hole (109).

6. The injection mold ejection and unloading structure as described in claim 1, characterized in that: A lifting slide (110) is slidably connected inside the lower mold (103); a stripper plate (112) is fixedly connected to the top surface of the lifting slide (110); the stripper plate (112) is aligned with the mold shell (107); two control pressure plates (113) are symmetrically fixedly connected to the top surface of the lifting slide (110); multiple sets of connecting springs (111) are fixedly connected to the bottom surface of the lifting slide (110); the ends of the multiple sets of connecting springs (111) are fixedly connected inside the lower mold (103).

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