CN217196755U - Rotary demolding device and forming mold - Google Patents

Abstract

The utility model relates to a rotatory shedder and forming die, rotatory shedder are including location axle, rotation axis, swivel nut and driving medium. Wherein, the positioning shaft is fixedly arranged. The rotating shaft is coaxially sleeved outside the positioning shaft and can rotate relative to the positioning shaft and move axially, the rotating shaft comprises a first thread section and a forming section, the first thread section is provided with a first external thread, and the forming section is used for forming an inner surface structure of a product. The threaded sleeve is sleeved on the first threaded section and is in threaded fit with the first threaded section. The transmission piece is connected with the rotating shaft and used for driving the rotating shaft to rotate, and the rotary demolding device can effectively limit radial runout of the rotating shaft through the positioning shaft, so that the rotating shaft is prevented from scratching the inner surface of a product.

Description

Rotary demolding device and forming mold

Technical Field

The utility model relates to a forming die technical field especially relates to a rotatory shedder and forming die.

Background

With the rapid development of automobiles, household electrical appliances, electronic communications and various medical instruments, forming molds for injection molding of various parts have also been rapidly developed. When a product with internal threads is produced, the internal threads of the product are formed through the external threads on the mandrel. In demoulding, the internal thread of the product is prevented from being damaged. Rotational demolding must be employed. Specifically, the existing demoulding structure mostly adopts the threaded fit of the mandrel and the fixed thread sleeve, and then the mandrel is rotated through the gear belt by the motor, so that the mandrel moves axially while rotating, the mandrel is separated from the product, and then the demoulding of the product is realized.

However, as the number of uses of the demoulding structure increases, wear occurs between the mandrel and the thread insert, and the thread insert cannot accurately limit the radial movement of the mandrel. When the mandrel rotates, the mandrel radially shakes while rotating relative to the threaded sleeve, so that the inner surface of a product is scratched by the radial shaking of the mandrel during demolding, and the product reject ratio is increased.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a rotary demolding device and a molding die, which are capable of solving the problem that the conventional rotary demolding structure is shaken due to abrasion after being used for many times, and further causing product defects.

In one aspect, the present application provides a rotary demolding device, comprising:

the positioning shaft is fixedly arranged;

the rotating shaft is coaxially sleeved outside the positioning shaft, can rotate relative to the positioning shaft and can axially move, and comprises a first thread section and a forming section for forming the inner surface of the product;

the screw sleeve is sleeved on the first threaded section and is in threaded fit with the first threaded section; and the number of the first and second groups,

the transmission part is connected with the rotating shaft and used for driving the rotating shaft to rotate.

Above-mentioned rotatory shedder and forming die drive the rotation axis through the driving medium and rotate when needs the drawing of patterns, because the first screw section and the swivel nut screw-thread fit of rotation axis for the rotation axis can rotate and axial displacement relative the swivel nut, and then makes the product break away from the shaping section of rotation axis, realizes the drawing of patterns of product. And the rotating shaft is coaxially sleeved on the positioning shaft, so that the rotating shaft can rotate relative to the positioning shaft and axially move, the positioning shaft can effectively position the rotating shaft, and the positioning shaft can effectively limit radial runout of the rotating shaft even if local abrasion occurs between the rotating shaft and the threaded sleeve after multiple uses, thereby avoiding the rotating shaft from scratching the inner surface of a product.

The technical solution of the present application is further described below:

in one embodiment, the rotating shaft is provided with a positioning hole, the positioning hole penetrates through at least one end of the rotating shaft along the axial direction of the rotating shaft, the positioning shaft is arranged in the positioning hole in a penetrating mode, and the positioning shaft comprises a connecting end which extends out of the positioning hole and is used for being connected to a mold.

In one embodiment, the positioning hole penetrates through two ends of the rotating shaft, the positioning shaft further comprises an ejecting end, and when the rotating shaft rotates relative to the screw sleeve and moves axially, the ejecting end extends out of the positioning hole and is used for ejecting a product.

In one embodiment, the diameter of the ejecting end is larger than that of the connecting end, a shaft shoulder structure is formed between the ejecting end and the connecting end, a step structure is formed on the wall of the positioning hole, and the shaft shoulder structure is in clamping fit with the step structure.

In one embodiment, the rotary demolding device further comprises a bearing, and the bearing is sleeved on the rotating shaft and is arranged at an interval with the threaded sleeve.

In one embodiment, the rotating shaft is provided with a limiting boss protruding in the radial direction, the rotating shaft can move axially relative to the bearing, and when the rotating shaft moves to the limiting position, the limiting boss is abutted to the bearing.

In one embodiment, the transmission member includes a transmission gear, and the transmission gear is sleeved on the rotating shaft.

In one embodiment, the profiled section is provided with an external thread for profiling an internal thread of the product.

In one embodiment, the diameter of the land increases in a direction in which the rotating shaft exits the product upon demolding.

On the other hand, the application also provides a forming die, which comprises the rotary demolding device.

Above-mentioned forming die drives the rotation axis through rotatory shedder's driving medium and rotates when needs the drawing of patterns, because the first screw section and the swivel nut screw-thread fit of rotation axis for the relative swivel nut of rotation axis ability rotates and axial displacement, and then makes the product break away from the shaping section of rotation axis, realizes the drawing of patterns of product. The rotating shaft is coaxially sleeved on the positioning shaft, the rotating shaft can rotate relative to the positioning shaft and axially move, and the positioning shaft is fixedly arranged, so that the positioning shaft can effectively position the rotating shaft, and even if local abrasion occurs between the rotating shaft and the threaded sleeve after multiple times of use, the positioning shaft can also effectively limit radial runout of the rotating shaft, and further the rotating shaft is prevented from scratching the inner surface of a product.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a rotary demolding apparatus according to an embodiment;

fig. 2 is a sectional view of the rotary mold releasing mechanism shown in fig. 1.

Description of reference numerals:

10. positioning the shaft; 11. a connecting end; 12. a push-out end; 13. a shaft shoulder structure; 20. a rotating shaft; 21. a forming section; 22. a first thread segment; 23. positioning holes; 24. a step structure; 25. a limiting boss; 30. a threaded sleeve; 40. a transmission member; 50. and a bearing.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

An embodiment of the present application provides a rotatory shedder for when the interior surface structure of shaping product, make the product drawing of patterns. Referring to fig. 1 and 2, fig. 1 and 2 show a schematic structural diagram of a rotary demolding device according to an embodiment of the present invention, specifically, the rotary demolding device according to an embodiment includes a positioning shaft 10, a rotating shaft 20, a screw sleeve 30, and a transmission member 40. Wherein the positioning shaft 10 is fixedly arranged, for example the positioning shaft 10 is used for fixing to a mould of a product. Preferably, the positioning shaft 10 is fixed to the mold base. Of course, in other embodiments, the positioning shaft 10 may be fixed to other external devices. Further, the rotating shaft 20 is coaxially sleeved outside the positioning shaft 10, the rotating shaft 20 can rotate relative to the positioning shaft 10 and axially move, the rotating shaft 20 comprises a first thread section 22 and a forming section 21, the first thread section 22 is provided with a first external thread, and the forming section 21 is used for forming an inner surface structure of a product. The threaded sleeve 30 is fixedly sleeved outside the positioning shaft 10. Preferably, the outer surface of the insert is used for fixing to a mold or other external device of a product, and the inner surface of the insert 30 is provided with a first internal thread matching the first external thread. The threaded sleeve 30 is sleeved on the first threaded section 22 and is in threaded fit with the first threaded section 22 through the first internal threads. The transmission member 40 is connected to the rotating shaft 20, and the transmission member 40 is used for driving the rotating shaft 20 to rotate, so that the rotating shaft 20 rotates relative to the threaded sleeve 30 and moves axially, and the product is separated from the forming section 21 of the rotating shaft 20.

Specifically, when the rotary demolding device is used, the inner surface structure of the product is firstly molded through the molding section 21 of the rotating shaft 20. When the product molding is completed and the demolding is needed, the transmission part 40 drives the rotating shaft 20 to rotate, and due to the threaded matching of the first thread section 22 of the rotating shaft 20 and the threaded sleeve 30, the rotating shaft 20 can rotate relative to the threaded sleeve 30 and move axially, so that the product is separated from the molding section 21 of the rotating shaft 20, and the demolding of the product is realized. And the rotating shaft 20 is coaxially sleeved on the positioning shaft 10, the positioning shaft 10 is fixed on a die or an external device, the positioning shaft 10 can effectively position the rotating shaft 20, and even if local abrasion occurs between the rotating shaft 20 and the threaded sleeve 30 after multiple uses, the positioning shaft 10 can also effectively limit radial runout of the rotating shaft 20, thereby avoiding the rotating shaft 20 from scratching the inner surface of a product.

Referring to fig. 2, the rotating shaft 20 is provided with a positioning hole 23, the positioning hole 23 penetrates at least one end of the rotating shaft 20 along the axial direction of the rotating shaft 20, the positioning shaft 10 is inserted into the positioning hole 23, and the positioning shaft 10 comprises a connecting end 11 extending out of the positioning hole 23 and used for being connected to a mold, so that by fixing the connecting end 11 to a bottom plate of the mold, when demolding is performed, the rotating shaft 20 can rotate and move axially relative to the positioning shaft 10, so that the positioning shaft 10 can effectively position the rotating shaft 20 and prevent the rotating shaft 20 from radially shaking.

Further, the positioning holes 23 penetrate both ends of the rotating shaft 20, the positioning shaft 10 further includes the ejecting end 12, and when the rotating shaft 20 rotates and moves axially with respect to the threaded sleeve 30, the ejecting end 12 protrudes out of the positioning holes 23 and serves to eject the product, thereby making it easier for the product to be detached from the rotating shaft 20.

Further, the diameter of the ejecting end 12 is larger than that of the connecting end 11, and a shaft shoulder structure 13 is formed between the ejecting end 12 and the connecting end 11. Correspondingly, the hole wall of the positioning hole 23 is provided with a step structure 24, and the shaft shoulder structure 13 is used for being matched with the step structure 24 in a clamping manner, so that the rotating shaft 20 and the positioning shaft 10 are assembled in place during assembly. Specifically, during assembly, the connecting end 11 of the positioning shaft 10 is first inserted into the positioning hole 23, and when the shaft shoulder structure 13 is engaged with the step structure 24, it means that the positioning shaft 10 and the rotating shaft 20 are assembled in place. Further, referring to fig. 1, during demolding, the rotating shaft 20 rotates forward and moves downward in the axial direction to disengage the product from the rotating shaft 20, and after demolding, the rotating shaft 20 needs to be driven to rotate backward, so that the rotating shaft 20 moves upward in the axial direction to achieve the resetting of the rotating shaft 20. Through the clamping fit of the shaft shoulder structure 13 and the step structure 24, the rotating shaft 20 can be prevented from moving upwards and passing through the position when resetting, and further the safety of the rotating shaft 20 and a die is ensured.

The rotary demolding device further comprises a bearing 50, the bearing 50 is sleeved on the rotating shaft 20 and arranged at intervals with the thread insert 30, the bearing 50 and the thread insert 30 can both radially limit the rotating shaft 20, and the bearing 50 and the thread insert 30 are arranged at intervals, so that the rotating shaft 20 can be radially limited from two positions of the rotating shaft 20, and the stability of the rotating shaft 20 in rotation is improved.

The rotating shaft 20 is provided with a limiting boss 25 protruding in the radial direction, the rotating shaft 20 can move axially relative to the bearing 50, and when the rotating shaft 20 moves to the limiting position, the limiting boss 25 is abutted to the bearing 50. Specifically, after demolding, the rotating shaft 20 needs to be driven to rotate reversely, so that the rotating shaft 20 moves upwards along the axial direction to reset, when the rotating shaft 20 moves upwards to the limit position, the limit boss 25 abuts against the bearing 50, the rotating shaft 20 is prevented from moving upwards, the rotating shaft 20 is prevented from colliding against a mold, and the safety of the rotating shaft 20 and the mold is ensured.

With reference to fig. 1, the transmission member 40 includes a transmission gear, and the transmission gear is sleeved on the rotating shaft 20, so that the transmission gear is driven by an external motor to rotate, and then the rotating shaft 20 is driven to rotate.

Referring to fig. 1, the forming section 21 is provided with a second external thread for forming an internal thread of the product. Understandably, in other embodiments, the outer surface of the shaping segment 21 may also be a smooth surface, thereby serving to shape the inner cavity of the product. Preferably, the diameter of the forming section 21 is gradually increased in the direction in which the rotating shaft exits the product upon demolding, i.e., the forming section 21 is of a conical structure, so that the product is more easily released from the forming section 21.

The application further provides a forming die, and specifically, the forming die of an embodiment includes the rotary demolding device of any one of the above embodiments. Further, the forming die further comprises a die body, and the die body is used for forming the outer surface structure of the product. The positioning shaft 10, the threaded sleeve 30 and the bearing 50 of the rotary demolding device are fixed on the mold body.

After the product is molded, when the product needs to be demolded, the driving part 40 drives the rotating shaft 20 to rotate, and the first thread section 22 of the rotating shaft 20 is in threaded fit with the thread insert 30, so that the rotating shaft 20 can rotate relative to the thread insert 30 and move axially, and the product is separated from the molding section 21 of the rotating shaft 20, and the product is demolded. And through coaxially sleeving the rotating shaft 20 on the positioning shaft 10, the positioning shaft 10 is fixed on the mold, the positioning shaft 10 can effectively position the rotating shaft 20, and even if local abrasion occurs between the rotating shaft 20 and the threaded sleeve 30 after multiple uses, the positioning shaft 10 can also effectively limit radial runout of the rotating shaft 20, so that the rotating shaft 20 is prevented from scratching the inner surface of a product during demolding.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, 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", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. A rotary demolding device, characterized by comprising:

the positioning shaft is fixedly arranged;

the rotating shaft is coaxially sleeved outside the positioning shaft, can rotate relative to the positioning shaft and can axially move, and comprises a first thread section and a forming section for forming the inner surface of a product;

the screw sleeve is sleeved on the first threaded section and is in threaded fit with the first threaded section; and the number of the first and second groups,

the transmission part is connected with the rotating shaft and used for driving the rotating shaft to rotate.

2. The rotary die-stripping device as claimed in claim 1, wherein the rotating shaft is provided with a positioning hole, the positioning hole penetrates at least one end of the rotating shaft along the axial direction of the rotating shaft, the positioning shaft is inserted into the positioning hole, and the positioning shaft comprises a connecting end which extends out of the positioning hole and is used for fixing to a die.

3. The rotary die-stripping apparatus as claimed in claim 2, wherein the positioning holes extend through both ends of the rotary shaft, the positioning shaft further includes an ejector end, and the ejector end protrudes through the positioning holes and is used for ejecting the product when the rotary shaft is rotated and axially moved relative to the threaded sleeve.

4. The rotary die-stripping device as claimed in claim 3, wherein the diameter of the ejecting end is larger than that of the connecting end, a shoulder structure is formed between the ejecting end and the connecting end, a step structure is formed on the wall of the positioning hole, and the shoulder structure is in clamping fit with the step structure.

5. The rotary demolding device as claimed in claim 1, further comprising a bearing, wherein the bearing is sleeved on the rotating shaft and spaced from the threaded sleeve.

6. The rotary die-stripping apparatus as claimed in claim 5, characterized in that the rotary shaft is provided with a radially projecting limit projection, the rotary shaft being axially movable relative to the bearing, and the limit projection abutting against the bearing when the rotary shaft is moved to a limit position.

7. The rotary demolding device as claimed in claim 1, wherein the transmission member includes a transmission gear, and the transmission gear is sleeved on the rotation shaft.

8. The rotary demolding apparatus as claimed in claim 1, wherein the molding section is provided with an external thread for molding an internal thread of the product.

9. The rotary demolding apparatus as claimed in claim 1, wherein the diameter of the molding section is gradually increased in a direction in which the rotary shaft exits the product at the time of demolding.

10. A forming die comprising the rotary die-releasing device as claimed in any one of claims 1 to 9.

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