CN212171136U - Molding device - Google Patents
Molding device Download PDFInfo
- Publication number
- CN212171136U CN212171136U CN202020156796.0U CN202020156796U CN212171136U CN 212171136 U CN212171136 U CN 212171136U CN 202020156796 U CN202020156796 U CN 202020156796U CN 212171136 U CN212171136 U CN 212171136U
- Authority
- CN
- China
- Prior art keywords
- cam
- mold
- groove
- sliding
- molding apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4435—Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4478—Removing or ejecting moulded articles for undercut articles using non-rigid undercut forming elements, e.g. elastic or resilient
Abstract
The utility model relates to a forming device, according to the utility model discloses a forming device of embodiment includes: a first mold including a first core forming an upper surface of the injection molding and a fixed cam; a second mold including a second core part forming a lower surface of the injection molding and formed to be separably coupled to the first mold; and a reverse forming part accommodated inside the first mold and the second mold and forming a reverse portion of the injection molding, wherein the reverse forming part includes: a sliding part connected to the fixed cam and formed to move along a shape of the fixed cam; and a cam moving part connected to the second core part and moving by the sliding part when the sliding part moves, wherein a first groove is formed at the sliding part, a protrusion is formed at the cam moving part, and a reverse part of the injection molding is formed by the first groove and the protrusion.
Description
Technical Field
The present invention relates to a molding apparatus, and more particularly to a molding apparatus which can easily remove an undercut (undercut) of an injection molding material and can easily separate the injection molding material from the molding apparatus.
Background
Generally, a tail lamp may be provided at the rear of the vehicle, the tail lamp may include a brake lamp for indicating whether a driver operates a brake pedal, a backup lamp for irradiating the rear when the vehicle moves backward, a signal lamp for informing a traveling direction of the vehicle, and the like, and a head lamp for securing a front view at night may be provided at the front of the vehicle, or various lamps may be provided in the vehicle.
As described above, the various lamps are mostly composed of a constitution including a housing, a plate, a reflector and a lens, and they are manufactured by injection molding a molten synthetic resin material into a desired shape by a molding device.
That is, the injection molding method using the molding apparatus is as follows: in a state where a pair of upper and lower or left and right molds having a core formed in accordance with the shape of a molded article are coupled, a molten resin is injected into the core by an injection molding machine, and after a cooling process, the pair of molds are separated from each other to take out a cooled and molded injection article, and finally, a molded article of a synthetic resin material is produced by shape processing.
However, in the conventional molding apparatus as described above, it is difficult to easily remove the undercut portion of the injection molded article, and the injection molded article may be damaged, so that the degree of freedom of the shape of the injection molded article is low.
Also, recently, injection molding is performed by a three-stage mold, but for the three-stage mold, the height is greater than that of the two-stage mold, and thus there is a space limitation.
[ Prior art documents ]
[ patent document ]
(patent document 1) Korean laid-open patent publication No. 10-2017-0014324 (2017.02.08)
SUMMERY OF THE UTILITY MODEL
Technical problem
The to-be-solved technical problem of the utility model is to provide a forming device that can easily get rid of the back-off part of the thing of moulding plastics.
The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.
Technical scheme
According to the utility model discloses a forming device of embodiment can include: a first mold including a first core forming an upper surface of the injection molding and a fixed cam; a second mold including a second core part forming a lower surface of the injection molding and formed to be separably coupled to the first mold; and a reverse forming part accommodated inside the first mold and the second mold and forming a reverse portion of the injection molding, wherein the reverse forming part includes: a sliding part connected to the fixed cam and formed to move along a shape of the fixed cam; and a cam moving part connected to the second core part and moving by the sliding part when the sliding part moves, wherein a first groove is formed at the sliding part, a protrusion is formed at the cam moving part, and a reverse part of the injection molding is formed by the first groove and the protrusion.
A rail groove may be formed on one surface of the fixed cam, a rail portion coupled to the rail groove may be provided on one surface of the sliding portion, and the sliding portion may be formed to move along the rail groove via the rail portion.
One surface of the fixed cam may be inclined so that a distance from the first core portion increases in a downward direction, and at least one surface of the sliding portion on which the rail portion is formed may be inclined so as to correspond to the one surface of the fixed cam.
The sliding portion may include: a reverse-buckling part which is formed with the first groove and is formed to be protruded towards the second core part direction; and a combining part configured to protrude toward the cam moving part and separably combined to the cam moving part.
The sliding portion may further include: and a first elastic part contacting an inner side surface of the first mold to be contracted, wherein the sliding part moves along the rail groove by an elastic force of the first elastic part when the first mold is separated from the second mold.
In the case where the sliding portion is moved by the elastic force of the first elastic portion, the undercut portion may be spaced apart from an undercut portion of the injection molded article, and the coupling portion is separated from the cam moving portion.
A second groove may be formed in one surface of the sliding portion in the up-down direction, and the first mold may further include a stopper including an engaging portion at least partially inserted into the second groove, and the sliding portion may be restricted from moving when the sliding portion moves and the engaging portion contacts an inner circumferential surface where the second groove is formed.
The second mold may include a contact plate that is in surface contact with at least a portion of the lower surface of the slide portion when the first mold is coupled to the second mold, thereby moving the slide portion in the direction of the second core.
The cam moving part may include: a cam having a coupling groove into which the coupling portion is inserted; a cam head connected to one surface of the cam; and a cam body connected to the cam head and having the protrusion formed on one surface thereof, wherein the cam body is received in the second core portion, and the other surface of the cam body is formed to be spaced apart from the second core portion.
The cam and cam nose may be located on the underside of the undercut.
The cam moving part may further include: and a second elastic part connected to the second core part and the cam, wherein the cam is moved in an upper direction by an elastic force when the coupling part is separated from the cam.
The second elastic portion may be formed to be contracted when the cam is moved downward in contact with the reverse portion.
One surface of the cam may be formed to be inclined so as to be closer to the cam body as it goes downward, and one surface of the cam head connected to the one surface of the cam may be formed to be inclined so as to be spaced apart from the cam body as it goes upward.
When the cam is moved upward by the elastic force of the second elastic part, the cam head may be moved in the direction of the cam body by the shape of one surface of the cam and one surface of the cam body, and further, the other surface of the cam body may be moved in the direction of the second core part, and the protrusion may be spaced apart from the undercut portion of the injection molded article.
The forming direction of the coupling portion may be formed to cross the forming direction of the coupling groove.
The engaging portion may contact a lower surface of an inner circumferential surface of the engaging groove to move the cam in a downward direction when the engaging portion is inserted into the engaging groove, and contact an upper surface of the inner circumferential surface of the engaging groove to move the cam in an upward direction when the engaging portion is separated from the engaging groove.
Advantageous effects
With the molding apparatus according to the present invention, the slide portion and the cam moving portion of the undercut forming portion are separated from the undercut portion of the injection molding material as the first mold and the second mold are separated, so that the injection molding material can be easily removed from the molding apparatus.
The effects according to the present invention are not limited to the above-described examples, and various effects are included in the present specification.
Drawings
Fig. 1 is a perspective view showing a molding device according to an embodiment of the present invention.
Fig. 2 is a diagram showing a state where a first mold and a second mold of a molding apparatus according to an embodiment of the present invention are separated.
Fig. 3 is a view schematically showing a cross section of a portion a-a' of the molding apparatus according to the embodiment of the present invention shown in fig. 1.
Fig. 4 and 5 are views showing an undercut forming portion of a molding device according to an embodiment of the present invention.
Fig. 6 and 7 are views showing a sliding portion of a molding device according to an embodiment of the present invention.
Fig. 8 and 9 are enlarged views of a part of fig. 3.
Fig. 10 is a view schematically showing a part of the inside of a molding apparatus according to an embodiment of the present invention.
Fig. 11 and 12 are views showing a state in which the sliding portion and the cam moving portion according to the embodiment of the present invention move.
Fig. 13a and 13b are diagrams showing a coupling portion and a coupling groove of a molding device according to an embodiment of the present invention.
Description of the symbols
1: the injection molding product 100: first mold
110: the first core 120: fixed cam
122: track groove 130: stop piece
132: the locking section 140: contact plate
200: second mold 210: second core part
300: undercut forming portion 310: sliding part
312: the track portion 314: back-off part
315: first groove 316: joining part
318: first elastic section 319: second groove
320: cam moving portion 322: cam wheel
323: the coupling groove 324: cam head
326: the cam body 328: second elastic part
Detailed Description
The advantages, features and methods of accomplishing the same will become apparent from the following detailed description of the embodiments when taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, which may be implemented in various forms different from each other, and the embodiment is provided only to complete the disclosure of the present invention and to inform a person having basic knowledge in the technical field to which the present invention pertains of the full scope of the present invention, which is defined only by the claims. Like reference numerals refer to like elements throughout the specification.
Accordingly, in several embodiments, well known process steps, well known structures, and well known techniques have not been described in detail in order to avoid obscuring the present invention.
The terminology used in the description is for the purpose of describing the embodiments and is not intended to be limiting of the invention. In this specification, the singular forms also include the plural forms unless specifically stated in the sentence. The terms "comprising" and/or "including" used in the specification mean that the presence or addition of one or more other constituent elements, steps and/or operations other than the mentioned constituent elements, steps and/or operations is not excluded. Additionally, "and/or" includes each of the referenced items and all combinations of more than one thereof.
Embodiments described herein will be described with reference to cross-sectional, side, and/or schematic views as idealized examples. Therefore, the form of the example drawings may be deformed depending on the manufacturing technique and/or tolerance, and the like. Therefore, the embodiments of the present invention are not limited to the specific forms shown in the drawings, and variations in form according to the manufacturing process are also included. In the drawings shown in the embodiments of the present invention, the respective components may be illustrated in somewhat enlarged or reduced sizes in consideration of convenience of explanation. Hereinafter, a preferred embodiment of the molding apparatus according to the present invention will be described in detail based on the drawings.
Fig. 1 is a perspective view showing a molding device according to an embodiment of the present invention, fig. 2 is a view showing a situation where a first mold is separated from a second mold of the molding device according to an embodiment of the present invention, and fig. 3 is a view schematically showing a cross section of a-a' portion of the molding device according to an embodiment of the present invention shown in fig. 1.
Referring to fig. 1 to 3, a molding apparatus according to the present invention may include a first mold 100, a second mold 200, and an undercut forming portion 300.
The injection molded object 1 may be formed by injecting a molten resin into a space formed by the first core part 110, the second core part 210, and the undercut forming part 300 and cooling the same when the first mold 100 is combined with the second mold 200. For example, a lens or the like included in the vehicle lamp may be injection molded, and the inverted portion of the injection molded article 1 may be formed as a frame hook or the like connected to a frame included in the vehicle lamp. Accordingly, the injection molded object 1 may be formed to include a lens in a frame hook shape, but is not limited thereto.
In the case of forming the injection molded article 1, the first mold 100 may be separated from the second mold 200 to remove the injection molded article 1. In this case, the second mold 200 may be moved downward to be separated in a state where the first mold 100 is fixed, or the first mold 100 may be moved upward to be separated from the second mold 200 in a state where the second mold 200 is fixed.
The first mold 100 may include a first core part 110 and a fixed cam 120 forming an upper surface of the injection object 1, the second mold 200 may include a second core part 210 forming a lower surface of the injection object 1 and formed to be capable of being coupled with and separated from the first mold 100, and the undercut forming part 300 may be accommodated inside the first mold 100 and the second mold 200 when the first mold 100 is coupled with the second mold 200 and form an undercut portion of the injection object 1.
The first and second cores 110 and 210 may be formed in shapes corresponding to the upper and lower surfaces of the injection object 1, and when the first mold 100 is combined with the second mold 200, the first and second cores 110 and 210 may be included in the first and second molds 100 and 200 in such a manner as to be provided at positions facing each other.
For example, the first core 110 may be included in the first mold 100 to form an exit surface of the lens, and the second core 210 may be included in the second mold 200 to form an entrance surface of the lens, but is not limited thereto.
The reverse forming portion 300 may further include a sliding portion 310 and a cam moving portion 320.
The sliding portion 310 may be connected to the fixed cam 120 to be formed to move in the shape of the fixed cam 120, and the cam moving portion 320 is connected to the second core portion 210 and moves in a direction spaced apart from the sliding portion 310 in the case where the sliding portion 310 moves. The first groove 315 may be formed in the sliding portion 310, the protrusion 327 may be formed in the cam moving portion 320 toward the first groove 315, and the reversed portion of the injection molded article 1 may be formed by the first groove 315 and the protrusion 327.
That is, when the first mold 100 and the second mold 200 are coupled, the molten resin may be injected into a space formed by the first core portion 110, the second core portion 210, the first groove 315, and the protrusion portion 327, thereby forming the injection molded article 1.
Accordingly, in the case where the first mold 100 and the second mold 200 of the molding apparatus according to the embodiment of the present invention are separated from each other by completing the injection molding, the sliding portion 310 may be moved in a direction of being spaced apart from the undercut portion of the injection molding 1 along the shape of the fixed cam 120, and the cam moving portion 320 may also be moved in a manner of being spaced apart from the undercut portion of the injection molding 1 along with the movement of the sliding portion 310. That is, as the interval between the sliding portion 310 and the cam moving portion 320 becomes larger, the reversed part of the injection molding 1 can be smoothly separated from the molding device.
Hereinafter, the sliding portion 310 and the cam moving portion 320 according to the embodiment of the present invention will be specifically described.
Fig. 4 and 5 are views showing an undercut forming portion of a molding device according to an embodiment of the present invention, fig. 6 and 7 are views showing a sliding portion of the molding device according to an embodiment of the present invention, and fig. 8 and 9 are views showing a part of an enlarged view of fig. 3.
Referring to fig. 3 to 9, a track groove 122 may be formed on one surface of the fixed cam 120, and the one surface of the fixed cam 120 may be formed to be inclined such that a distance from the first core part 110 is greater in a downward direction. One surface of the sliding portion 310 may further include a rail portion 312 coupled to the rail groove 122, and at least a surface of the one surface of the sliding portion 310 on which the rail portion 312 is formed may be formed to be inclined so as to correspond to the one surface of the fixed cam 120. That is, the rail portion 312 may be formed obliquely.
Accordingly, the rail part 312 may move along the inclined shape of the rail groove 122, and thus the sliding part 310 may move along the inclined shape of the rail groove 122. That is, the sliding portion 310 may be guided by the rail groove 122 when moving. For example, the sliding portion 310 may be moved in an outer direction of the first mold 100 to be spaced apart from the injection object 1.
In addition, as shown in fig. 5, the rail groove 122 may be formed in a T-shape, but is not limited thereto.
The sliding portion 310 may further include a reverse portion 314, a coupling portion 316, and a first elastic portion 318, in addition to the rail portion 312. The inverse-catching portion 314 may be formed to protrude from the other surface of the sliding portion 310 toward the second core portion, and is formed with the above-described first groove 315. The coupling portion 316 may be provided to protrude from the other surface of the sliding portion 310 toward the cam moving portion 320, so as to be formed to be able to couple and separate with the cam moving portion 320 as the first mold 100 is coupled and separated with the second mold 200. Specifically, the coupling portion 316 may be formed to be more upward toward the cam moving portion 320, and may be coupled to a cam 322 of the cam moving portion 320, which will be described later.
The reverse portion 314 may be formed to be long in the longitudinal direction in which the sliding portion is formed, and the first groove 315 may be formed to be long in the longitudinal direction in which the reverse portion 314 is formed.
The first elastic part 318 may be formed to be at least partially accommodated inside the sliding part, and may be formed to contract by contacting with an inner side surface of the first mold 100 or other components included in the first mold 100 when the first mold 100 is coupled to the second mold 200, and to expand by an elastic force when the first mold 100 is separated from the second mold 200. Therefore, in the case where the first mold 100 is coupled to the second mold 200, the first elastic part may prevent damage due to movement of the sliding part by a buffer action, and in the case where the first mold 100 is separated from the second mold 200, the elastic force may be transmitted to the sliding part 310 to move the sliding part 310. The first elastic portion 318 may be formed of, for example, a spiral spring, a spring, or the like, but is not limited thereto, and may be provided in plurality in the sliding portion 310.
Also, according to the above, in the case where the slide part 310 moves away from the first core part 110, the undercut part 314 may move in a direction spaced apart from the first core part 110, that is, in a direction spaced apart from the undercut portion of the injection molding 1, and the coupling part 316 may be separated from the cam moving part 320.
The cam moving part 320 may include a cam 322, a cam head 324, a cam main body 326, and a second elastic part 328. The cam 322 may be detachably coupled to the coupling portion 316, the cam head 324 may be coupled to one surface of the cam 322, the cam body 326 is coupled to the cam head 324, and the protrusion 327 is formed on one surface of the cam body 326. Also, the cam body 326 may be formed to be inserted into the second core part 210, and when the cam 322 is coupled with the coupling part 316, the other face of the cam body 326 is formed to be spaced apart from the second core part 210 by a preset distance d. Here, the preset distance d may be formed to be 3mm, but is not limited thereto.
One surface of the cam 322 may be inclined so as to be closer to the cam main body 326 as it goes downward, and one surface of the cam head 324 connected to the one surface of the cam 322 may be inclined so as to be spaced apart from the cam main body 326 by a distance that becomes greater as it goes upward.
The convex portion 327 of the cam main body 326 may be formed at a more upper side than the cam head 324, and the cam main body 326 and the cam head 324 may be formed in one shape.
The cam 322 may be formed with a coupling groove 323 into which at least a portion of the coupling portion 316 is inserted, and the coupling groove 323 may be formed to correspond to the shape of the coupling portion 316.
The second elastic part 328 is connected to the second core part 210 and the cam 322, and functions to move the cam 322 to an upper side by an elastic force when the combining part 316 is separated from the cam 322 as the first mold 100 is separated from the second mold 200. Specifically, a part of the second elastic portion 328 is formed to be accommodated inside the second core portion 210, and the remaining part is formed to be accommodated inside the cam 322.
Also, in the case where the first mold 100 is coupled to the second mold 200, the cam 322 and the cam head 324 may be formed to be positioned under the undercut portion 314 of the slide portion 310. Therefore, when the first mold 100 is coupled to the second mold 200, the cam 322 may contact the undercut portion 314 to move in a downward direction, and the second elastic portion 328 may contract as the cam 322 moves downward. The second elastic part 328 may be formed as a spiral spring, a spring, or the like, but is not limited thereto.
In contrast, in the case where the first mold 100 is separated from the second mold 200 and the coupling portion 316 is separated from the cam 322, the cam 322 may be moved to the upper side by the elastic force of the second elastic portion 328.
When the cam 322 moves upward, the cam head 324 moves in the direction of the cam body 326 due to the shape of one surface of the cam 322 and one surface of the cam head 324, and further, the one surface of the cam body 326 moves in the direction of the second core portion 210, and the protrusion 327 is spaced from the portion of the injection molded article. At this time, the other face of the cam body 326 may contact the second core, or the distance between the other face of the cam body 326 and the second core 210 may be reduced.
As a result, as the first mold 100 is separated from the second mold 200, the slide part 310 moves, the undercut forming part 300 is spaced apart from the undercut portion of the injection molding 1, as the slide part 310 moves, the cam 322 of the cam moving part 320 rises, as the cam head 324 and the cam main body 326 move, the protrusion 327 is spaced apart from the undercut portion of the injection molding 1, and therefore, it is possible to easily separate the injection molding 1 from the molding apparatus.
Fig. 10 is a view schematically showing a part of the inside of a molding apparatus according to an embodiment of the present invention.
If the sliding portion 310 continues to move as the first mold 100 is separated from the second mold 200, the rail portion 312 of the sliding portion 310 is separated from the rail groove 122, and the sliding portion 310 may be damaged. Therefore, the movement of the sliding portion 310 needs to be controlled to some extent. Accordingly, the first mold 100 may further include a stopper 130 inside.
Referring to fig. 5 and 10, a second groove 319 may be formed on one surface of the sliding part 310, and the second groove 319 may be formed in a vertical direction, but is not limited thereto.
The stopper 130 may include a locking portion 132 functioning to control the movement of the sliding portion 310, and at least a portion of the locking portion 132 is formed to be inserted into the second groove 319, but is not in contact with the inner circumferential surface where the second groove 319 is formed. However, in the case where the sliding portion 310 moves in the outer direction of the first mold 100 and the locking portion 132 comes into contact with the inner circumferential surface where the second groove 319 is formed, the sliding portion 310 may be restricted from moving.
In addition, the locking portion 132 may be formed to be inclined in a lower direction toward the second groove 319 due to the shape of the inclined surface of the sliding portion 310.
The second mold 200 according to the present invention may further include a contact plate 140. In the case where the sliding portion 310 moves while the first mold 100 is separated from or coupled to the second mold 200, at least a portion of the lower surface of the sliding portion 310 may contact the contact plate 140 and move.
Specifically, when the first mold 100 and the second mold 200 are coupled, the contact plate 140 is in surface contact with at least a part of the lower surface of the sliding portion 310 to support the sliding portion 310, and functions to move the sliding portion 310 in the direction of the second core portion 210. That is, the sliding portion 310 may be guided by the rail groove 122 and moved in the direction of the second core portion 210 as the lower surface of the sliding portion 310 moves in contact with the contact plate 140.
In contrast, in the case where the first mold 100 is separated from the second mold 200, at least a portion of the lower surface of the sliding portion 310 may be moved in an outer direction in contact with the contact plate 140 by means of the elastic force transmitted by the first elastic portion 318. Also, in case that the first mold 100 is completely separated from the second mold 200, the lower surface of the sliding portion 310 may be formed to be separated from the contact plate 140, as needed.
Hereinafter, the separation and movement of the first mold 100 and the second mold 200 according to the embodiment of the present invention will be described in sequence.
Fig. 11 and 12 are views showing a state in which the sliding portion and the cam moving portion according to the embodiment of the present invention move.
As described above, the first mold 100 and the second mold 200 according to an embodiment of the present invention may be separated in the case of forming the injection molding 1.
As the first mold 100 is separated from the second mold 200, the slide 310 is guided to move along the shape of the track groove 122 by the elastic force of the contracted first elastic part 318, and the undercut 314 of the slide 310 may be spaced apart from the undercut of the injection molded article 1. Also, as the sliding portion 310 moves, the coupling portion 316 of the sliding portion 310 coupled with the cam 322 may be separated from the cam 322. At this time, the sliding portion 310 may move until the locking portion 132 of the stopper 130 contacts the inner circumferential surface of the second groove 319 of the sliding portion 310.
As the coupling portion 316 is separated from the cam 322, the second elastic portion 328 generates an elastic force in an upper direction to move the cam 322 in the upper direction. As the cam 322 moves, the cam head 324 and the cam body 326 may move toward the second core 210, and the interval between the other face of the cam body 326 and the second core 210 decreases or the other face of the cam body 326 contacts the second core 210.
As a result, the injection molded article 1 can be efficiently removed from the molding device as the undercut portion 314 formed with the first groove 315 and the cam main body 326 formed with the protrusion 327 are spaced apart from the undercut portion of the injection molded article 1.
Conversely, in order to form the injection molded article, at least one of the first mold 100 and the second mold 200 may be moved to couple the first mold 100 and the second mold 200 again.
In this case, at least a portion of the lower surface of the slide part 310 may be moved in contact with the contact plate 140 included in the second mold 200, so that the slide part 310 is guided to move toward the second core part 210 along the shape of the track groove 122. The cam 322 is movable in a downward direction as it comes into contact with the undercut portion 314 of the sliding portion 310, so that the second elastic portion 328 is contracted, and the cam head 324 and the cam main body 326 are moved in the direction of the sliding portion 310 by the movement of the cam 322. Accordingly, the coupling portion 316 of the sliding portion 310 may be coupled to the cam 322 to restrict the movement of the cam 322, and the other face of the cam main body 326 is formed to be spaced apart from the second core portion 210 by a preset distance.
Accordingly, the molten resin can be injected into the space formed by the first core portion 110, the second core portion 210, the first groove of the undercut portion 314, and the protrusion of the cam body, thereby producing the injection molded product again.
Fig. 13a and 13b are diagrams showing a coupling portion and a coupling groove of a molding device according to an embodiment of the present invention.
As described above, the coupling portion may be protruded in the other side of the sliding portion 310 facing the cam moving portion 320 and formed in the upper direction as it goes toward the cam moving portion 320. However, the coupling groove 323 may be formed in a direction different from the protruding direction of the coupling portion 316. As shown in fig. 13a and 13b, the coupling groove 323 may be formed in a direction L2 intersecting the protruding direction L1 of the coupling portion 316. For example, the protruding direction L1 of the coupling part 316 and the forming direction L2 of the coupling groove 323 may form a predetermined angle, and the slope of the protruding direction L1 of the coupling part 316 may be formed to be greater than the slope of the forming direction L2 of the coupling groove 323.
The purpose of the formation as described above is to make the cam 322 move more efficiently. In the case where the first mold 100 is combined with the second mold 200 and the cam 322 moves downward to stay for a long time, the cam 322 may be restricted in its movement by the surrounding structure of the cam 322 and other substances penetrating into the inside of the molding apparatus, so that the cam 322 may not move even if the first mold 100 is separated from the second mold 200. Therefore, when the protruding direction L1 of the coupling portion 316 intersects the forming direction L2 of the coupling groove 323, the coupling portion 316 can move the cam 322 downward and upward as it is coupled to and separated from the coupling groove 323, and the second elastic portion 328 can be smoothly operated.
Specifically, when the cam 322 contacts the reverse portion 314 and moves in the downward direction, and the coupling portion 316 is inserted into the coupling groove 323, the coupling portion contacts the lower surface of the inner circumferential surface of the coupling groove 323 and is inserted according to the forming direction of the coupling groove 323, and therefore, as shown in fig. 13a, the cam 322 can be further moved in the downward direction, and the second elastic portion 328 can be further contracted. Thus, the lower surface of the undercut 314 may be spaced from the cam 322. In the case where the first mold 100 is separated from the second mold 200, the coupling portion 316 is separated from the coupling groove 323, and the coupling portion 316 inserted into the coupling groove 323 is separated while contacting the upper surface in the inner circumferential surface of the coupling groove 323, and thus the second elastic portion 328 is moved to the upper side, so that the elastic force of the second elastic portion 328 can be smoothly applied.
In addition, one side of the coupling portion 316 may be smoothly formed so that the coupling portion 316 can be smoothly inserted into the coupling groove 323, but is not limited thereto.
The utility model belongs to the technical field of possess the personnel of basic knowledge certainly can understand can with other concrete form implementation under the prerequisite that does not change technical thought or necessary characteristics the utility model discloses. The embodiments described above are therefore exemplary in all respects, and should be understood as not limiting. The scope of the present invention is defined not by the foregoing detailed description but by the appended claims, and all changes and modifications that can be derived from the meaning and range described in the claims and the equivalent thereof should be construed as being included in the scope of the present invention.
Claims (16)
1. A molding apparatus, comprising:
a first mold including a first core forming an upper surface of the injection molding and a fixed cam;
a second mold including a second core part forming a lower surface of the injection molding and formed to be separably coupled to the first mold; and
a reverse-buckling forming part which is accommodated in the first mold and the second mold and forms a reverse-buckling part of the injection molding object,
wherein the back-off forming part comprises:
a sliding part connected to the fixed cam and formed to move along a shape of the fixed cam; and
a cam moving part connected with the second core part and moved by the sliding part when the sliding part moves,
wherein a first groove is formed in the sliding portion,
a projection is formed at the cam moving portion,
the reverse part of the injection molding object is formed by the first groove and the protrusion.
2. The molding apparatus as defined in claim 1,
a track groove is formed at one surface of the fixed cam,
a rail part coupled to the rail groove is provided on one surface of the sliding part,
the sliding portion is formed to move along the rail groove via the rail portion.
3. The molding apparatus as defined in claim 2,
one surface of the fixed cam is formed to be inclined so that a distance from the first core portion increases in a downward direction,
at least one surface of the sliding portion, on which the rail portion is formed, is formed to be inclined so as to correspond to one surface of the fixed cam.
4. The molding apparatus as defined in claim 2,
the sliding portion includes:
a reverse-buckling part which is formed with the first groove and is formed to be protruded towards the second core part direction; and
and a combining part configured to protrude toward the cam moving part and separably combined to the cam moving part.
5. The molding apparatus as defined in claim 4,
the sliding portion further includes: a first elastic part contacting with the inner side surface of the first mold and contracting,
wherein the sliding portion moves along the rail groove by means of an elastic force of the first elastic portion when the first mold is separated from the second mold.
6. The molding apparatus as defined in claim 5,
when the sliding portion is moved by the elastic force of the first elastic portion, the reverse portion is spaced apart from the reverse portion of the injection molded article, and the coupling portion is separated from the cam moving portion.
7. The molding apparatus as defined in claim 2,
a second groove is formed on one surface of the sliding part along the vertical direction,
the first mold further includes a stopper including a catching portion at least partially inserted into the second groove,
the sliding portion is restricted from moving when the sliding portion moves and the engaging portion comes into contact with an inner peripheral surface where the second groove is formed.
8. The molding apparatus as defined in claim 1,
the second mold includes a contact plate that is,
the contact plate is in surface contact with at least a part of a lower surface of the sliding portion when the first mold is coupled to the second mold, thereby moving the sliding portion in the second core portion direction.
9. The molding apparatus as defined in claim 4,
the cam moving portion includes:
a cam having a coupling groove into which the coupling portion is inserted;
a cam head connected to one surface of the cam;
a cam body connected to the cam head and having the protrusion formed on one surface thereof,
wherein the cam body is housed in the second core portion, and the other surface of the cam body is formed to be spaced apart from the second core portion.
10. The molding apparatus as defined in claim 9,
the cam and the cam head are positioned at the lower side of the back-off part.
11. The molding apparatus as defined in claim 9,
the cam moving portion further includes: and a second elastic part connected to the second core part and the cam, wherein the cam is moved in an upper direction by an elastic force when the coupling part is separated from the coupling groove of the cam.
12. The molding apparatus as defined in claim 11,
the second elastic portion is formed to contract when the cam moves downward in contact with the reverse portion.
13. The molding apparatus as defined in claim 9,
one surface of the cam is formed to be inclined so as to be closer to the cam main body as going downward,
one surface of the cam head connected to one surface of the cam is formed to be inclined so as to be spaced apart from the cam body as the surface goes upward.
14. The molding apparatus as defined in claim 11,
when the cam is moved upward by the elastic force of the second elastic part, the cam head is moved in the direction of the cam body by the shape of one surface of the cam and one surface of the cam body, and further, the other surface of the cam body is moved in the direction of the second core part, and the protrusion is spaced apart from the undercut portion of the injection molded article.
15. The molding apparatus as defined in claim 9,
the forming direction of the combining part is crossed with the forming direction of the combining groove.
16. The molding apparatus as defined in claim 15,
the engaging portion is in contact with a lower surface of an inner circumferential surface of the engaging groove in a state where the engaging portion is inserted into the engaging groove, thereby moving the cam in a downward direction,
when the engaging portion is separated from the engaging groove, the engaging portion contacts an upper surface of an inner circumferential surface of the engaging groove, and the cam is moved in an upper direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190045227A KR20200122491A (en) | 2019-04-18 | 2019-04-18 | Molding apparatus |
| KR10-2019-0045227 | 2019-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212171136U true CN212171136U (en) | 2020-12-18 |
Family
ID=73018293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020156796.0U Active CN212171136U (en) | 2019-04-18 | 2020-02-07 | Molding device |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20200122491A (en) |
| CN (1) | CN212171136U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170014324A (en) | 2015-07-29 | 2017-02-08 | 에스엘 주식회사 | Apparatus for molding |
-
2019
- 2019-04-18 KR KR1020190045227A patent/KR20200122491A/en active Search and Examination
-
2020
- 2020-02-07 CN CN202020156796.0U patent/CN212171136U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20200122491A (en) | 2020-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20130305653A1 (en) | Method of molding clip mount and trim board | |
| CN108582674B (en) | Secondary demoulding mechanism of injection mould | |
| CN111432996B (en) | Undercut processing mechanism, molding die, and molded article | |
| CN212171136U (en) | Molding device | |
| CN208645923U (en) | Automobile front mask injection mold with release mechanism in inverted buckle slider | |
| WO2012141488A2 (en) | Integrated slide for a mould | |
| CN104245271B (en) | Mold for vehicle bumper fascia and associated molding technique | |
| JPH07223244A (en) | Resin molding die device | |
| KR101156196B1 (en) | Injection mold apparatus | |
| JP6057327B2 (en) | Injection molding equipment | |
| JP2000043105A (en) | Injection molding device | |
| JP2005178185A (en) | Injection molding mold and method for producing injection-molded article using the mold | |
| CN210308858U (en) | Tripping mechanism and injection mold | |
| CN209704261U (en) | A kind of pin shaft structure of shell and the mold for producing the structure | |
| JPH08323823A (en) | Injection molding method and mold used therefor | |
| CN219664969U (en) | Demoulding device of automobile part production mould | |
| CN205395041U (en) | Hale demoulding mechanism | |
| CN211518364U (en) | Automobile center console mold structure with reverse buckle and rapid demolding function | |
| JPS58134726A (en) | Mold for injection molding | |
| CN212194059U (en) | Back-off demoulding structure | |
| CN214395266U (en) | Injection molding mold with inverted buckle | |
| CN216860487U (en) | Demoulding structure | |
| CN215849340U (en) | Demoulding device | |
| CN217395594U (en) | Delayed demoulding structure of mould | |
| CN116890432A (en) | Radar support demoulding mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |