CN216465665U

CN216465665U - Internal thread demoulding mechanism of moulding

Info

Publication number: CN216465665U
Application number: CN202122815491.3U
Authority: CN
Inventors: 张静
Original assignee: Dongguan Chengde Plastic Hardware Mould Co ltd
Current assignee: Dongguan Chengde Plastic Hardware Mould Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-05-10
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses an internal thread demoulding mechanism of a plastic mould, which is arranged on a movable mould and comprises a driving device, a first transmission shaft and a second transmission shaft, wherein the first transmission shaft is provided with a first transmission wheel, and the second transmission shaft is provided with a second transmission wheel, an adjusting ring and a thread part. According to the utility model, the movable die is provided with the first driving wheel, the second driving wheels which are meshed with the first driving wheel and the second driving wheels simultaneously, the stepped second transmission shafts matched with the second driving wheels are arranged, and the mandrel is arranged in each second transmission shaft, so that a plurality of threaded cores can be synchronously driven to synchronously leave the cavity of the fixed die during die separation, the synchronous die stripping requirements of different die cavities in the same die production are met, the integral structure is simple and compact, and the die stripping action is reliable; through set up the adjustable ring on every second transmission shaft, can realize adjusting the purpose of moulding an internal thread start-stop position, can improve the fashioned precision of a piece internal thread of moulding, promote the product quality.

Description

Internal thread demoulding mechanism of moulding

Technical Field

The utility model relates to the technical field of plastic molds, in particular to an internal thread demolding mechanism of a plastic mold.

Background

The internal thread bottle cap is a common plastic part, and in the production of the internal thread bottle cap by molding, the bottle cap is demoulded in two modes: one is that a hydraulic motor is adopted to drive a chain wheel to drive a plastic part to rotate, the plastic part falls off from a mold core after being unscrewed, and the start-stop position of a screw tooth cannot be positioned in the demolding mode; the other mode is that the oil cylinder drives the rack to drive the plastic part to rotate and translate, and the plastic part falls off after leaving the die core constraint, and the start and stop positions of the screw teeth of the plastic part can be positioned in the mode, but the structural layout of the plastic part can interfere with a conventional automatic part taking manipulator, and the manual part taking is required or a special manipulator is designed, so that the production cost is high.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the internal thread demoulding mechanism of the mould, which can synchronously drive a plurality of mould cores with threads to synchronously leave the cavity of the fixed mould during mould separation, meets the synchronous demoulding requirements of different mould cavities in the same mould production, has simple and compact integral structure and reliable demoulding action, can adjust the starting and stopping positions of the internal thread of the plastic part, improves the forming precision of the internal thread of the plastic part and improves the product quality.

In order to solve the technical problems, the utility model adopts a technical scheme as follows:

an internal thread demoulding mechanism of a mould is arranged on a moving mould of the mould, and more than one cavity matched with a plastic part is formed on a fixed mould of the mould; the demolding mechanism includes:

the driving device is detachably and fixedly arranged on the movable die through an installation plate; the mounting plate is provided with a rack, and the rack is in transmission connection with the driving device and can be driven by the driving device to translate on the movable die;

the first transmission shaft is vertically arranged on the movable die and extends towards the fixed die; a driven wheel and a first transmission wheel are sleeved on the first transmission shaft, and the driven wheel is meshed and connected with the rack; the first transmission shaft can be driven by the driven wheel to synchronously rotate with the driven wheel, and drives the first transmission wheel to synchronously rotate;

the second transmission shafts are vertically arranged on the movable die and surround the periphery of the first transmission shaft, each second transmission shaft is sleeved with a second transmission wheel in a matching mode, each second transmission wheel is meshed with the first transmission wheel and can rotate under the driving of the first transmission wheel; one end of each second transmission shaft is provided with a threaded part, each threaded part can extend into one cavity when the die is closed, a mandrel is arranged in each second transmission shaft in a matched mode, one end of each second transmission shaft is arranged on the movable die, and the other end of each second transmission shaft can extend into one cavity when the die is closed; when the die is separated, the threaded part can rotate and withdraw from the die cavity, and the mandrel can withdraw from the die cavity along the die separating direction.

As a further elaboration of the above technical solution:

in the above technical scheme, each second transmission shaft is a stepped hollow shaft, and an adjusting part is arranged in the middle of the outer wall of the second transmission shaft and is arranged between the second transmission wheel and the threaded part.

In the above technical scheme, each second transmission shaft is provided with an adjusting ring at the periphery of the adjusting part in a matching manner, each adjusting ring can be pressed on each second transmission wheel, and a plurality of adjusting blocks are embedded on the outer wall of each adjusting ring along the circumferential direction.

In the technical scheme, one end part of each mandrel is provided with a positioning part, the movable die is provided with a positioning seat matched with the positioning part, and the positioning seat can be matched with the movable die so as to fix the mandrel at a proper position of the movable die; and the other end of each mandrel is provided with a core matched with the plastic part, and each core extends to the outer side of one second transmission shaft.

In the technical scheme, more than two bearings are sleeved on each second transmission shaft, and each bearing is arranged on the movable die; the second transmission shaft is close to the end part of the fixed die, and the end part of the fixed die is further sleeved with a limiting ring, and each limiting ring is close to the end part of the fixed die and is provided with a cavity matched with the cavity.

In the above technical scheme, the movable mold is provided with a chute, a sliding plate is arranged in the chute, and the rack is arranged on the sliding plate.

In the above technical scheme, the slide plate is further provided with more than two sensors, and each sensor is electrically connected with the driving device.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the movable die is provided with the first driving wheel, the second driving wheels which are meshed with the first driving wheel and the second driving wheels simultaneously, the stepped second driving shafts matched with the second driving wheels are arranged, and the mandrel is arranged on each second driving shaft, so that a plurality of threaded cores can be synchronously driven to synchronously leave the cavity of the fixed die during die separation, the synchronous die stripping requirements of different die cavities in the same die production are met, the integral structure is simple and compact, and the die stripping action is reliable; through set up the adjustable ring on every second transmission shaft, can realize adjusting the purpose of moulding an internal thread start-stop position, can improve the fashioned precision of moulding an internal thread, promote the product quality.

Drawings

FIG. 1 is a schematic structural view of the present embodiment in a mold clamping state;

FIG. 2 is a schematic front view of the present embodiment in a mold clamping state;

FIG. 3 is a schematic structural view of a second transmission shaft in the present embodiment;

FIG. 4 is a schematic structural view of the mandrel in the present embodiment;

fig. 5 is a schematic view of the structure of the adjusting ring in this embodiment.

In the figure: 100. molding; 10. a drive device; 20. a first drive shaft; 30. a first drive pulley; 40. a second drive shaft; 41. A threaded portion; 42. an adjustment section; 50. a second transmission wheel; 60. a mandrel; 61. a positioning part; 62. a core; 70. an adjusting ring; 71. an adjusting block; 80. a bearing; 90. a limiting ring; 91. a cavity; 2. a rack; 4. a slide plate; 5. a driven wheel; 6. a sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-5, an internal thread demoulding mechanism of a mould is arranged on a moving mould of the mould, and more than one cavity matched with a plastic part is formed on a fixed mould of the mould; the demolding mechanism includes:

the driving device 10 is detachably and fixedly arranged on the movable mould through an installation plate; a rack 2 is arranged on the mounting plate, and the rack 2 is in transmission connection with a driving device 10 and can be driven by the driving device to translate on the movable die;

a first transmission shaft 20 vertically provided on the movable mold and extending toward the fixed mold; a driven wheel 5 and a first transmission wheel 30 are sleeved on the first transmission shaft 20, and the driven wheel 5 is meshed with the rack 2; the first transmission shaft 20 can rotate synchronously with the driven wheel 5 under the drive of the driven wheel and drives the first transmission wheel 30 to rotate synchronously;

a first transmission shaft 20 vertically provided on the movable mold and extending toward the fixed mold; the first transmission shaft 20 is sleeved with a first transmission wheel 30, the first transmission wheel 30 is meshed with the rack 2, and the first transmission wheel 30 can rotate under the driving of the driving device 10;

the plurality of second transmission shafts 40 are vertically arranged on the movable die and surround the periphery of the first transmission shaft 20, each second transmission shaft 40 is sleeved with a second transmission wheel 50 in a matching mode, each second transmission wheel 50 is meshed and connected with the first transmission wheel 30, and each second transmission shaft 40 can rotate under the driving of the first transmission wheel 30; one end of each second transmission shaft 40 is provided with a threaded part 41, and each threaded part 41 can extend into a cavity when the mold is closed; a mandrel 60 is arranged in each second transmission shaft 40 in a matching way, one end part of each second transmission shaft is arranged on the movable die, and the other end part of each second transmission shaft can extend into a cavity when the dies are closed; during mold separation, the threaded portion 41 can rotate and retreat from the cavity, and the mandrel 60 can retreat from the cavity along the mold separation direction.

In order to facilitate the display of the internal structure of the utility model, the movable die and the fixed die are not shown in the figures.

Further, each second transmission shaft 40 is a stepped hollow shaft, and an adjusting portion 42 is disposed at the middle portion of the outer wall of the second transmission shaft, and the adjusting portion 42 is disposed between the second transmission wheel 50 and the threaded portion 41.

Furthermore, each second transmission shaft 40 is sleeved with an adjusting ring 70 on the periphery of the adjusting portion 42 in a matching manner, each adjusting ring 70 can be pressed against each second transmission wheel 50, and a plurality of adjusting blocks 71 are embedded on the outer wall of each adjusting ring 70 along the circumferential direction.

In order to realize the controllability of the start-stop position of the screw teeth, the end part of the second transmission wheel 50 is provided with the adjusting ring 70, the relative distance between the second transmission shaft 40 and the fixed die can be adjusted by adjusting the adjusting ring 70 (matching with a backing ring with a proper height), and the purpose of adjusting the depth of the screw thread part 41 extending into the cavity during die assembly, namely adjusting the start-stop position of the screw teeth in the plastic part, is achieved. Meanwhile, the adjusting block 71 can limit the distance between the adjusting ring 70 and the first transmission wheel 30, so as to avoid the first transmission wheel 30 from colliding with parts on the second transmission shaft 40 due to adjustment errors or abnormalities.

In the present embodiment, the external diameter of the adjusting ring 40 is greater than the external diameter of the second transmission wheel 50; the adjusting portion 42 is an external thread provided on the outer wall of the second transmission shaft 40, and an internal thread matched with the internal thread is provided on the inner wall of the adjusting ring 70.

Furthermore, one end of each mandrel 60 is provided with a positioning part 61, the movable die is provided with a positioning seat matched with the positioning plate 61, and the positioning seat can be matched with the movable die so as to fix the mandrel 60 at a proper position of the movable die; the other end of each mandrel 60 is provided with a mould 62 adapted to the plastic, each mould 62 extending outside a second drive shaft 40.

During mold splitting, the movable mold drives the mandrel 60 to directly exit the cavity.

In the present embodiment, the contour dimension of the core 62 is larger than the inner ring diameter of the second transmission shaft 40, so that the molding accuracy during molding can be ensured, and the core 62 and the threaded portion 41 can be synchronously stripped by pressing against the end of the second transmission shaft 40 during demolding.

Further, more than two bearings 80 are sleeved on each second transmission shaft 40, and each bearing 80 is arranged on the movable mold; the end part of the second transmission shaft 40 close to the fixed die is also sleeved with a limiting ring 90, and a cavity 91 matched with the cavity is formed in the end part of each limiting ring 90 close to the fixed die.

Furthermore, the movable mould is provided with a sliding chute, a sliding plate 4 is arranged in the sliding chute, and the rack 2 is arranged on the sliding plate.

In the present embodiment, the rack 2 is integrally formed with the slider 4.

Furthermore, more than two sensors 6 are arranged on the sliding plate 4, and each sensor 6 is electrically connected with the driving device 10.

During operation, the sensor 6 can sense the relative position of the two end parts of the rack 2 on the movable die, so that information can be fed back in time under the condition of abnormal driving, and the damage to a plastic part caused by the demolding mechanism is avoided.

The working process of the utility model is as follows:

and the movable mold and the fixed mold are matched, and after the plastic part is molded, the movable mold leaves the fixed mold under the driving of mold splitting force to drive the demolding mechanism to synchronously leave the fixed mold. Meanwhile, the driving device 10 drives the rack 2 to drive the sliding plate 4 to slide in the chute 3, the rack 2 drives the driven wheel 5 to rotate, and the driven wheel 5 drives the first transmission shaft 20 and the first transmission wheel 30 to synchronously rotate; the first transmission wheel 30 is meshed with the plurality of second transmission wheels 50 simultaneously and drives each second transmission wheel 50 to rotate, each second transmission wheel 50 drives one second transmission shaft 40 to rotate, and the threaded part 42 at the upper end of each second transmission shaft 40 rotates relative to the plastic part; under the drive of the movable die, the demoulding mechanism leaves the fixed die, and drives the threaded part 42 to synchronously leave the cavity, so that the demoulding of the internal thread is realized; meanwhile, the movable mold drives the mandrel 60 fixed thereon to move along the mold splitting direction, and the mold core 62 is pulled away from the interior of the plastic part, so that the demolding action is completed.

When the device is operated, the connection between the positioning part 61 at the bottom of the mandrel 60 and the movable die is firstly loosened, and the relative distance between the threaded part 41 at the end part of the second transmission shaft 40 and the cavity of the fixed die is adjusted by adjusting and pressing the adjusting ring 70 (matched with a backing ring with a proper height) pressed on the second transmission wheel 50, so as to achieve the purpose of adjusting the start-stop position of the screw teeth; after the adjustment is completed, the positioning part 61 is fixed on the movable mold.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. The internal thread demoulding mechanism of a mould is characterized in that the internal thread demoulding mechanism is arranged on a movable mould of the mould, and more than one cavity matched with a plastic part is formed on a fixed mould of the mould; the demolding mechanism includes:

the second transmission shafts are vertically arranged on the movable die and surround the periphery of the first transmission shaft, each second transmission shaft is sleeved with a second transmission wheel in a matching mode, each second transmission wheel is meshed with the first transmission wheel and can rotate under the driving of the first transmission wheel; one end of each second transmission shaft is provided with a threaded part, and each threaded part can extend into one cavity when the mold is closed; a mandrel is arranged in each second transmission shaft in a matching manner, one end of each mandrel is arranged on the movable die, and the other end of each mandrel can extend into a cavity when the dies are closed; when the die is separated, the threaded part can rotate and withdraw from the die cavity, and the mandrel can withdraw from the die cavity along the die separating direction.

2. The internally threaded mold release mechanism of claim 1, wherein each of the second shafts is a stepped hollow shaft having an adjustment portion in the middle of the outer wall thereof, the adjustment portion being provided between the second transmission wheel and the threaded portion.

3. The mold internally threaded demolding mechanism of claim 2, wherein an adjusting ring is fittingly sleeved on each second transmission shaft at the periphery of the adjusting portion, each adjusting ring can be pressed against each second transmission wheel, and a plurality of adjusting blocks are embedded on the outer wall of each adjusting ring along the circumferential direction.

4. The mold internally threaded demolding mechanism of claim 1, wherein each of the mandrels has a positioning portion at one end thereof, and the movable mold has a positioning seat matching the positioning portion, the positioning seat being capable of engaging with the movable mold to fix the mandrel in place on the movable mold; and the other end of each mandrel is provided with a core matched with the plastic part, and each core extends to the outer side of one second transmission shaft.

5. The mold internally threaded demolding mechanism of claim 2, wherein each of the second transmission shafts is provided with two or more bearings, and each of the bearings is mounted on the movable mold; the second transmission shaft is close to the end part of the fixed die, and the end part of the fixed die is further sleeved with a limiting ring, and each limiting ring is close to the end part of the fixed die and is provided with a cavity matched with the cavity.

6. A mould internally threaded demoulding mechanism according to any of claims 1 to 5, wherein the movable mould is provided with a slide in which a slide is provided, and the rack is provided on the slide.

7. A mould internally threaded demoulding mechanism according to claim 6, wherein more than two sensors are provided on the slide, each sensor being electrically connected to the drive means.