CN218196616U - Floating demoulding structure - Google Patents

Abstract

The application discloses a floating type demoulding structure, which comprises an inclined guide pillar, a sliding block and a second insert, wherein the inclined guide pillar is fixedly arranged on the end surface of a fixed mould; the sliding block is slidably arranged on the movable die; the slide block is suitable for being matched with the inclined guide post; the second insert is slidably arranged on the sliding block along the demoulding direction of the movable mould and is used for forming the square hole; when the demoulding process is carried out, the movable mould is suitable for driving the sliding block to move away from the fixed mould; in the process, the second insert is kept static with the formed square hole by sliding along the sliding block in the demolding direction; meanwhile, the second insert moves synchronously along with the slide block in the direction vertical to demoulding so as to demould the square hole. The beneficial effect of this application: by arranging the floating second insert, the second insert and the square hole can be kept flush along the position vertical to the demoulding direction when the movable mould carries out moving demoulding, so that the interference of the second insert to the square hole is avoided in the demoulding process; the quality of the formed barrel body can be further improved.

Description

Floating demoulding structure

Technical Field

The application relates to the technical field of injection molds, in particular to an injection mold for a high-fall product.

Background

The high drop height product refers to a product with higher molding height or deeper molding depth. Common products with high fall include a box body, a barrel body and the like.

As shown in fig. 1, a tub 100 of a conventional washing machine has a structure, the tub 100 includes at least one cavity 110, and a depth of the cavity 100 is more than 500 mm; meanwhile, the barrel 100 is thin, generally 3-5mm. Thus, when the core mold demolds the cavity 110 of the tub 100, since the contact area is large, a required demolding force is large, and the cavity 110 is easily pulled, cracked, or deformed, etc., thereby affecting the molding quality of the tub 100.

Meanwhile, as shown in fig. 2, a plurality of square holes 120 are provided at the open sidewall of the tub 100; thus, when the movable mold is used for demolding, the insert for molding the square hole 120 can simultaneously move along with the movable mold in a direction perpendicular to the opening direction of the square hole 120 and move through the guide post in a direction parallel to the opening direction of the square hole 120. The above process may break the square hole 120 although the insert can be detached from the square hole 120.

Therefore, a mold capable of improving the molding quality of a product having a high drop height is urgently required.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the present application is to provide a sectional type demolding structure capable of improving cavity molding quality.

Another object of the present application is to provide a floating type demolding structure capable of ensuring high drop height product molding quality.

Still another object of the present application is to provide an injection mold capable of improving molding quality of a product having a high drop height.

In order to achieve at least one of the above purposes, the technical solution adopted by the present application is: a floating type demoulding structure comprises an inclined guide post fixedly arranged on the end surface of a fixed die, a slide block slidably arranged on a movable die and a second insert slidably arranged on the movable die along the demoulding direction; the second insert is used for forming a square hole in the side wall of the opening of the barrel body, and the sliding block is suitable for being matched with the inclined guide post; when the demoulding process is carried out, the movable mould is suitable for driving the sliding block to move away from the fixed mould; in the process, the second insert is kept static along the sliding of the sliding block and the formed square hole in the demolding direction; meanwhile, the second insert moves synchronously along with the sliding block in the direction vertical to demoulding so as to demould the square hole.

Preferably, the second insert and the slide block are elastically connected by a second spring, so that the second insert slides with respect to the slide block under the elastic force of the second spring and is kept stationary with the molded square hole in the second process.

Preferably, a movable cavity is arranged on the end surface of the fixed die close to the substrate; a first insert used for forming the barrel body is obliquely and slidably arranged in the movable cavity; the first insert corresponds to the second insert in position; the first insert and the movable cavity are also elastically connected through a first spring; the slide block is suitable for wedge-shaped matching with the first insert through the arranged wedge-shaped part; when the molding process is carried out, the first insert is aligned with the inner wall of the fixed mold under the extrusion of the wedge-shaped part, at the moment, the first spring is in a stretching state, and the first insert is abutted against the second insert; when the demolding process is carried out, the sliding block is far away from the first insert, and then the first insert moves away from the molded rear barrel body and the second insert along the movable cavity under the elastic force of the first spring, so that a movable gap can be generated between the second insert and the first insert to compensate the shrinkage height of the barrel body in the mold opening process.

Preferably, the first insert is connected with the movable cavity through a first spring; when the forming process is carried out, the first spring is in a stretching or compressing state; when demolding is performed, the first insert is adapted to perform a tilt slide along the movable cavity under the elastic force of the first spring.

Preferably, an extending direction of the first spring is the same as a sliding direction of the first insert.

Preferably, in the demolding process, the first insert can generate a movable gap with a maximum distance of X from the end face of the fixed die; the value of X is 7.5-10mm.

Preferably, the movable mold comprises a base plate, and the slide block is mounted on the side portion of the base plate in a sliding manner along a direction perpendicular to the demolding direction.

Compared with the prior art, the beneficial effect of this application lies in:

(1) The core mold and the molded cavity side wall are sequentially separated in a segmented manner, so that the demolding area of the core mold and the cavity in the demolding process can be reduced, the demolding force applied to the barrel body when the core mold is demolded is effectively reduced, and the demolding quality of the barrel body is improved.

(2) By arranging the floating second insert, the second insert and the square hole can be kept flush along the position vertical to the demolding direction when the substrate is subjected to moving demolding, so that the interference of the second insert to the square hole is avoided in the demolding process; thereby further improving the quality of the formed barrel body.

Drawings

Fig. 1 is a schematic structural diagram of a barrel in the prior art.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a simplified overall structure diagram of the present invention.

Fig. 4 is a schematic view showing an exploded state of the core mold of the present invention.

Fig. 5 is a schematic structural diagram of a first molding module according to the present invention.

Fig. 6 is a schematic view of the first forming module according to the present invention in an exploded state.

Fig. 7 is a schematic structural diagram of the first molding block of the present invention.

Fig. 8 is a schematic structural diagram of the second forming block of the present invention.

Fig. 9 is a schematic structural diagram of a second molding module according to the present invention.

Fig. 10 is a schematic view of the exploded state of the ejector mechanism according to the present invention.

Fig. 11 is a schematic structural diagram of the first driving part of the present invention.

Fig. 12 is a schematic structural view of the driving rod of the present invention.

Fig. 13 is a schematic view of the matching state of the demolding mechanism and the core mold during molding according to the present invention.

Fig. 14 is a first schematic view illustrating the state of the ejector mechanism engaged with the core mold during the mold release of the present invention.

Fig. 15 is a schematic diagram of the matching state between the demolding mechanism and the core mold in demolding according to the present invention.

Fig. 16 is a third schematic view of the matching state of the demolding mechanism and the core mold during demolding according to the present invention.

Fig. 17 is a schematic view showing a first matching state between the first forming block and the second forming block when the present invention is in the mold release.

Fig. 18 is a schematic diagram of a second matching state between the first forming block and the second forming block when the mold is removed.

Fig. 19 is a schematic view of the matching state of the floating type demolding structure during the molding process of the present invention.

FIG. 20 is a schematic view of the matching state of the floating type demolding structure during demolding

In the figure: the injection molding machine comprises a barrel body 100, a cavity 110, a square hole 120, a fixed die 2, a movable cavity 200, a first inclined surface 201, a first insert 21, a second inclined surface 211, a first spring 22, an inclined guide post 23, a base plate 3, a slider 31, a wedge portion 311, a second insert 32, a second spring 33, a core die 4, a cavity 400, a connecting groove 401, a first molding module 41, a clamping groove 410, a first connecting groove 411, a guide rod 412, a first molding module 42, a first molding block 421, a driving groove 4210, a traction block 4211, a second molding block 422, a traction groove 4220, a connecting block 4221, a second molding module 43, a second molding module 44, a first through hole 440, a guide groove 441, a demoulding mechanism 5, a driving rod 51, a first stop 511, a second stop 512, a 513, a guide block 514, a first driving part 52, a second through hole 520, a second connecting groove 521, a driving block 522, a guide hole 523, a second driving part 53, a third spring 54 and a fourth spring 55.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In one of the preferred embodiments of the present application, as shown in fig. 3 to 18, an injection mold for a high drop height product includes a fixed mold 2, a movable mold, and a demolding mechanism 5; the fixed die 2 is fixedly arranged, a forming groove is formed in the fixed die 2, and the movable die and the forming groove can be matched with each other to form a forming deep cavity for forming the barrel body 100; wherein, the forming groove is used for forming the outer wall of the barrel body 100; the movable mold is used to mold the inner wall of the cavity 110.

The movable mould comprises at least one core mould 4 and a base plate 3 which are arranged in a segmented mode; the core mold 4 is mounted to the base plate 3, and the core mold 4 can be engaged with the molding groove for molding the cavity 110 in the tub 100. The demolding mechanism 5 is mounted on the substrate 3 and matched with the core mold 4; when the mold release is performed, the mold release process includes a first process and a second process; wherein the first process: the demolding mechanism 5 can sequentially drive each section of the core mold 4 to contract towards the center of the movable mold, so that the core mold 4 is sequentially separated from the side wall of the molded cavity 110 in sections; thereby reducing the demolding area of the core mold 4 and the cavity 110 in the demolding process, and effectively reducing the demolding force of the core mold 4 to the inner wall of the cavity 110 in the demolding process, so as to improve the demolding quality of the barrel body 100. The second process: the movable mold drives the demolding mechanism 5 to synchronously move away from the molded barrel body 100; the tub 100 attached to the fixed mold 2 may then be discharged by an ejector mechanism (not shown).

In this embodiment, the number of the core molds 4 can be set as needed. For example, for a single tub washing machine, the tub 100 has only one single cavity 110, and the number of the core molds 4 is one. In the case of the twin tub washing machine, as shown in fig. 1, the tub 100 has a pair of cavities 110, and the number of the core molds 4 is one pair. The mandrel 4 is configured to fit into a corresponding cavity 110.

Meanwhile, in the demolding process, the movable mold is driven by an actuating device, and the driving and the structure of the actuating device are all the prior art and are well known to those skilled in the art. Common actuators include pneumatic and hydraulic cylinders, etc. The specific structure and driving manner of the material ejecting mechanism are all the prior art and are well known to those skilled in the art. A common ejection mechanism carries out blanking for an actuating device through the driving of an ejector rod.

In one embodiment of the present application, as shown in fig. 4, 13 to 16, a cavity 400 is provided inside the core mold 4; each section of the core mold 4 includes a first molding module 41, at least one molding module, and a second molding module 44. Wherein, the first forming module 41 is located at the end of the core mold 4, and can be used for forming the bottom end surface of the cavity 110; the second molding module 44 is fixedly mounted on the base plate 3 and can be used for molding the sidewall of the cavity 110 near the opening of the barrel 100; the molding die set is fittingly installed between the first molding die 41 and the second molding die 44, and may be used to mold the remaining side walls of the cavity 110. The demoulding mechanism 5 is respectively matched with the first moulding module 41 and the moulding module in the cavity 400; when the first process is performed; the demolding mechanism 5 may first drive the first molding module 41 to contract into the cavity 400 along the demolding direction, so as to realize demolding between the bottom end of the cavity 110 and the first molding module 41; then the demolding mechanism 5 can drive each forming module to sequentially contract towards the center of the cavity 400 along a direction perpendicular to the demolding direction, so as to realize demolding of the forming module and the inner wall of the cavity 110. When the second process is performed, the second molding module 44 may be moved in synchronization with the mold to perform the demolding with the remaining sidewall of the cavity 110 after the molding, thereby completing the entire demolding process of the core mold 4 from the cavity 110. The sectional type release structure for releasing the molded barrel body 100 can be formed by the structure and the fitting relationship of the core mold 4.

It is understood that the respective regions of the cavity 110 are formed by dividing the core mold 4 into a plurality of sections including the first forming module 41, the second forming module 44, and at least one forming module; that is, the entire inner wall of the cavity 110 is divided into a plurality of mold release regions having different areas and being independent of each other. Therefore, in the demolding process, according to the sequential demolding of the first molding module 41, the molding module and the second molding module 44 from far to near, only one section of the core mold 4 and the corresponding demolding area can be ensured to be demolded in each demolding process; compared with the traditional integral demoulding method, the demoulding force applied to the demoulding of the cavity 110 can be effectively reduced. Meanwhile, when the other sections of the second molding block 44 are removed for demolding, the core mold 4 can ensure the stability of the region of the cavity 110 in demolding through the contact and cooperation of the remaining at least one section with the cavity 110, so as to avoid large deformation floating, thereby improving the molding quality of the cavity 110.

Meanwhile, as shown in fig. 1 and 3, the bottom end surface of the cavity 110 is not a flat plane, and has a tapered opening structure according to the actual functional requirements. The molding of the tapered opening of the cavity 110 can be completed by the first molding module 41 at the time of demolding, so that the first molding module 41 can only perform movement in the demolding direction at the time of demolding to perform demolding.

Meanwhile, when the conventional integral demolding is performed, the core mold 4 performs demolding by moving the sidewall in the demolding direction, so that the core mold 4 can generate a demolding force parallel to the demolding direction on the inner wall of the cavity 110, and the demolding force can break the connecting position of the side edge and the bottom end of the barrel 100, especially in the structure of the double cavities 110, a thin partition plate between the two cavities 110 is most easily broken. In this application, carry out the drawing of patterns through the removal of shaping module along perpendicular drawing of patterns direction, can be with the inside wall of the drawing of patterns power perpendicular to cavity 110 that produces, and then avoid cavity 110's inside wall and bottom hookup location to be broken by the pull. Meanwhile, the deformation of the inner side wall of the cavity 110 in the direction perpendicular to the demolding direction can be reduced by the contact fit of the second molding module 44 and the cavity 110.

In this embodiment, as shown in fig. 6 and 13 to 16, each molding module includes a set of first molding blocks 421 and a set of second molding blocks 422, which are equal in number. The first forming block 421 and the second forming block 422 are sequentially and adjacently arranged in a surrounding manner, and the first forming block 421 and the second forming block 422 are matched through a traction structure. Meanwhile, the included angle direction of the two side surfaces for adjacent matching of the first forming block 421 faces away from the center of the cavity 400, and the included angle direction of the two side surfaces for adjacent matching of the second forming block 422 points to the center of the cavity 400. The demoulding mechanism 5 can be matched and connected with the first forming block 421; therefore, when the mold is removed, the mold removing mechanism 5 may drive the first molding block 421 to move to the center of the cavity 400 by a set distance, and then drive the first molding block 421 and the second molding block 422 to synchronously contract and move to the center of the cavity 400 through the traction structure.

It can be understood that, during the molding process, the side surfaces between the first molding block 421 and the second molding block 422 are sealed and attached to each other, so as to ensure that the molding module can be stably molded.

Meanwhile, since the first molding block 421 and the second molding block 422 are sequentially arranged in a surrounding manner, and both the first molding block 421 and the second molding block 422 need to move towards the center of the cavity 400, an included angle exists between the moving directions of the first molding block 421 and the second molding block 422. Therefore, in order to ensure that the molding module can perform a retracting movement towards the center of the cavity 400, the first molding block 421 may be driven to move towards the center of the cavity 400 by a set distance, so that an avoiding gap can be formed between the first molding block 421 and the second molding block 422; and then the second forming block 422 can move towards the center of the cavity 400 synchronously along with the first forming block 421 through a traction structure, so that the motion interference between the second forming block 422 and the first forming block 421 can be effectively avoided, and the smooth shrinkage and demolding of the forming module can be ensured. And in the process of moving the second forming block 422, the avoiding gap between the first forming block 421 and the second forming block 422 is gradually reduced until they are attached to each other.

In this embodiment, as shown in fig. 7, 8, 17 and 18, the traction structure comprises a traction block 4211 and a traction groove 4220 which are in sliding fit, and the size of the traction groove 4220 is larger than that of the traction block 4211. The traction block 4211 and the traction groove 4220 are arranged in two specific modes; in a first mode, the traction block 4211 is arranged on the side wall of the first forming block 421, and the traction groove 4220 is arranged on the side wall of the second forming block 422; in the second mode, the traction block 4211 is disposed on the sidewall of the second forming block 422, and the traction groove 4220 is disposed on the sidewall of the first forming block 421. So that the traction block 4211 can slide from the first side to the second side relative to the traction groove 4220 during the first forming block 421 moves to the set distance; and the second forming block 422 can move synchronously with the first forming block 421 by the abutting fit of the traction block 4211 and the second side of the traction groove 4220.

It can be understood that the size difference between the traction groove 4220 and the traction block 4211 is a value of a set distance moved by the first molding block 421. For example, the first side of the traction groove 4220 is a side far from the cavity 400, and the second side is a side close to the cavity 400. Therefore, during the molding process, the first molding block 421 can be engaged with the first side of the pulling groove 4220 through the pulling block 4211 to ensure that the second molding block 422 is stable during the molding process. When the demolding process is performed, the first molding block 421 drives the traction block 4211 to slide along the traction groove 4220 until the first molding block abuts against the second side; the second forming block 422 can then perform a synchronous centripetal movement with the first forming block 421, so that a space with a value of t is formed between the second forming block 422 and the inner side wall of the cavity 110; the value of t can be set according to the actual continuous needs of the product, and is generally 5-10mm.

In this embodiment, the specific number of the first and second forming blocks 421 and 422 may be selected according to the structure of the cavity 110. When the cross-section of the cavity 110 is circular, the number of the first forming blocks 421 and the second forming blocks 422 is at least two. And when the cross-section of the cavity 110 is rectangular as shown in fig. 1, as shown in fig. 6, 17 and 18, the number of the set of first molding blocks 421 and the set of second molding blocks 422 is four; and the first molding blocks 421 are respectively used for molding four corner positions of the cavity 110. So that when the mold is removed, the first molding block 421 can drive the second molding block 422 to move perpendicular to the corresponding sidewall of the cavity 110 by moving along the diagonal line; that is, during the movement of the second forming block 422, the forming surface of the second forming block 422 is always parallel to the corresponding sidewall of the cavity 110.

In one embodiment of the present application, as shown in fig. 10, 13 to 16, the ejector mechanism 5 includes a driving device (not shown), a driving rod 51, and at least one driving member. The driving parts and the corresponding molding modules are connected in a matching manner through the driving structures, and the driving parts and the first molding module 41 are arranged at intervals; the driving rod 51 is slidably mounted on the substrate 3 and penetrates through the driving part to be connected with the first forming module 41, and the driving device is mounted on the substrate 3 and connected with the driving rod 51, so that the driving rod 51 is driven by the driving device to axially slide. When the first process is performed, the driving rod 51 may first drive the first molding module 41 to retract into the cavity 400 under the driving of the driving device; then, the driving rod 51 and the driving part are squeezed to drive the driving part to drive the molding module to contract towards the center of the cavity 400 through the driving structure.

It will be appreciated that the construction and operation of the drive means are well known in the art. Common driving devices include air cylinders, hydraulic cylinders, linear motors, and the like.

In the present embodiment, as shown in fig. 7, 11, and 13 to 18, the driving structure includes a driving block 522 and a driving groove 4210 that are slidably engaged. The driving block 522 and the driving groove 4210 are arranged in two ways; in the first mode, the driving block 522 is obliquely arranged on the side of the driving part, and the driving groove 4210 is obliquely arranged on the inner wall of the first molding block 421; in the second embodiment, the driving block 522 is obliquely disposed on the inner wall of the first molding block 421, and the driving groove 4210 is obliquely disposed on the side of the driving member. Therefore, during the first process, the driving part can move along with the driving rod 51 along the demolding direction, and further, the driving block 522 and the driving groove 4210 slide mutually to drive the first molding block 421 to move centripetally along the direction perpendicular to the demolding direction, and further, the second molding block 422 is driven by the traction structure to synchronously contract towards the center of the cavity 400.

It will be appreciated that the drive block 522 and the drive slot 4210 are always connected throughout the demolding of the molding die set.

In one embodiment of the present application, the core mold 4 is released from the mold by a releasing force sufficiently small. As shown in fig. 4, 13 to 16, the number of the molding dies is preferably two, and the two molding dies are a first molding die 42 adjacent to the first molding die 41 and a second molding die 43 adjacent to the second molding die 44, respectively. Then, the number of the driving parts is also two, the two driving parts being the first driving part 52 and the second driving part 53, respectively; the first driving part 52 is correspondingly matched with the first molding module 42, and the second driving part 53 is correspondingly matched with the second molding module 43. Therefore, in order to ensure the mold-releasing effect of the core mold 4 during the mold-releasing, the first molding block 41, the first molding block 42, and the second molding block 43 can be sequentially driven by the driving rod 51 to be contracted toward the center of the cavity 400.

In this embodiment, in order to ensure that the first molding die set 42 and the second molding die set 43 can contract in the vertical demolding direction. As shown in fig. 4, the end surface where the first molding die set 42 and the second molding die set 43 contact each other, and the end surface where the second molding die set 43 and the second molding die set 44 contact each other are perpendicular to the mold release direction. So that the second molding die set 43 can limit the degree of freedom of the first molding die set 42 in the demolding direction when the first molding die set 42 is shrunk; the second molding module 44 can restrict the degree of freedom of the second molding module 43 in the mold-releasing direction when the second molding module 43 contracts.

In this embodiment, for structural connection stability of each section between the core molds 4; as shown in fig. 5, 11, and 13 to 16, the side portion of the first molding module 41 is engaged with the inner wall of the first molding module 42 through a wedge structure, so that in the molding process, the driving rod 51 is abutted against the first molding module 41, so as to ensure that the first molding module 41 is tightly attached to the end portion of the first molding module 42 for molding the bottom end surface of the cavity 110. The inner end surface of the first molding block 41 is eccentrically provided with a guide rod 412 parallel to the demolding direction, and the first driving member 52 is provided with a guide hole 523 slidably engaged with the guide rod 412. Therefore, the first molding module 41 can be structurally stabilized during the demolding process by the cooperation of the guide rod 412 and the guide hole 523.

Meanwhile, the first molding module 42 and the second molding module 43, and the second molding module 43 and the second molding module 44 are connected by a connection structure. As shown in fig. 8, 9 and 13 to 16, a connection structure between the second molding group 43 and the second molding module 44 is taken as an example; the connecting structure comprises a plurality of connecting grooves 401 and a connecting block 4221 which are mutually in sliding clamping connection; the connecting groove 401 and the connecting block 4221 are arranged in two ways; in the first mode, the connecting groove 401 is disposed on the end surface of the second molding block 44, and the connecting block 4221 is disposed on the end surface of the second molding block 422; in the second mode, the connecting groove 401 is disposed on an end surface of the second molding block 422, and the connecting block 4221 is disposed on an end surface of the second molding block 44. The number of the connecting grooves 401 and the connecting blocks 4221 is equal to that of the second molding blocks 422, and the extending direction of the connecting grooves 401 is perpendicular to the corresponding side wall of the cavity 110; further, during the contraction of the molding module, the second molding block 422 performs a centripetal movement perpendicular to the sidewall of the cavity 110 by the sliding of the connection block 4221 relative to the connection groove 401.

It is understood that the number of the guide rods 412 and the guide holes 523 can be set according to actual requirements, for example, as shown in fig. 5 and 11, the number of the guide rods 412 and the guide holes 523 is four, and the four guide rods 412 and the guide holes 523 are circumferentially distributed along the first molding module 41 and the first driving part 52, respectively.

When the molding module is subjected to shrinkage demolding, the shrinkage of the first molding module 42 and the shrinkage of the second molding module 43 are generally the same, so that the moving distances of the driving rod 51 driving the first driving part 52 and the second driving part 53 respectively along the demolding direction are also the same; that is, the driving rod 51 drives the first driving part 52 and the second driving part 53 to move separately.

In one embodiment of the present application, in order to achieve the individual driving of the first driving part 52 and the second driving part 53 by the driving rod 51; as shown in fig. 5, 11-16; a clamping groove 410 is formed in the center of the inner side of the first molding module 41, and a first connecting groove 411 is formed in the side of the clamping groove 410; the driving rod 51 can be engaged with the slot 410 through a latch 513 disposed at an end portion of the driving rod passing through the first communicating slot 411, so as to drive the first molding module 41 to move. The first driving member 52 is provided at a middle portion thereof with a second through hole 520 slidably engaged with the driving lever 51, and a side portion of the second through hole 520 is provided with a second communicating groove 521 aligned with the first communicating groove 411. The driving rod 51 is respectively provided with a first stop 511 and a second stop 512; wherein the first stopper 511 is located at the rod section between the first driving part 52 and the second driving part 53; the second stopper 512 is located at a rod section between the second driving part 53 and the second molding module 44. During the forming process, the first stopper 511 abuts against the first driving part 52, and the second stopper 512 is lower than the second driving part 53. The driving rod 51 is engaged with the second molding block 44 through a deflecting structure.

When the mold release is being performed, the first process includes a first driving process, a second driving process, and a third driving process. Wherein the first driving process: the first molding module 41 is driven by the driving rod 51 to contract into the cavity 400 until abutting against the first driving part 52 through the connection of the clamping groove 410 and the clamping block 513; in this process, the driving lever 51 is rotated by the deflecting structure. A second driving process: through the abutting of the first molding module 41, the driving rod 51 can drive the first molding module 41 and the first driving part 52 to synchronously move along the demolding direction, so as to drive the first molding module 42 to contract towards the center of the cavity 400 until the first stopper 511 abuts against the second driving part 53; in this process, the driving lever 51 continues to rotate through the deflecting structure until the latch 513 on the driving lever 51 is axially aligned with the first communicating groove 411 and the second communicating groove 521, respectively. A third driving process: the driving rod 51 continues to drive the second driving part 53 to synchronously move along the demolding direction through the abutment of the first stopper 511, so as to drive the second molding module 43 to contract towards the center of the cavity 400; in this process, the driving rod 51 only moves axially, and then the latch 513 can slide along the first communicating groove 411 and the second communicating groove 521, respectively, so as to disengage the driving rod 51 from the first molding module 41 and the first driving member 52, thereby realizing the independent driving of the second driving member 53.

In this embodiment, as shown in fig. 9 and 12 to 16, the middle portion of the second molding module 44 is provided with a first through hole 440; the deflecting structure includes a sliding fit of guide slot 441 and guide block 514. The guide groove 441 and the guide block 514 are arranged in two ways; the method I comprises the following steps: the guide groove 441 is disposed on a sidewall of the first through hole 440, and the guide block 514 is disposed on a sidewall of the driving rod 51; in the second embodiment, the guide groove 441 is disposed on the sidewall of the driving rod 51, and the guide block 514 is disposed on the sidewall of the first through hole 440. Wherein the guide groove 441 includes an inclined section and a vertical section; so that the guide block 514 always slides along the inclined section during the first driving process and the second driving process, and the driving rod 51 is deflected while moving axially; and at the end of the second driving process, the guide block 514 slides right to the boundary of the inclined section and the vertical section; further, during the third driving process, the guide block 514 can slide along the vertical section to ensure that the driving rod 51 only moves axially to drive the second driving member 53 to move independently.

It can be understood that, during the first driving process and the second driving process, the guide rod 412 and the guide hole 523 cooperate to limit the circumferential rotation of the first molding block 41, so as to prevent the first molding block 41 from deflecting with the driving rod 51 under the action of friction. Meanwhile, in the third driving process, the first molding module 41 and the first driving part 52 can be stably connected and prevented from being deviated due to the cooperation of the guide rod 412 and the guide hole 523.

When the core mold 4 is reset after the above-described demolding process is completed, the driving rod 51 drives the first molding block 41 to move in the reverse direction first. However, as can be seen from the above, the side portion of the first molding module 41 is engaged with the inner wall of the first molding block 42 by the wedge structure, so that the first reset of the first molding module 41 may interfere with the first molding block 42.

In one embodiment of the present application, the reset interference of the first molding module 41 is avoided. As shown in fig. 10 and 13 to 16, the ejector mechanism 5 further includes a third spring 54, and the third spring 54 is fitted around the drive rod 51. When the molding process is performed, one end of the third spring 54 abuts against the first stopper 511, and the other end of the third spring 54 abuts against the first driving part 52; the third spring 54 is in a compressed state at this time, so that the structural stability of the first molding die set 42 during the molding process is ensured by the elastic force of the third spring 54. When the resetting process is performed, the third spring 54 may press the first driving member 52 to drive the first driving member 52 and the first molding module 41 to move in the opposite direction of the demolding direction, so as to avoid the occurrence of an interference condition.

In the present embodiment, as shown in fig. 10 and 13 to 16, the ejector mechanism 5 further includes a fourth spring 55; a fourth spring 55 is sleeved on the driving rod 51, one end of the fourth spring 55 abuts against the second driving part 53, and the other end of the fourth spring 55 abuts against the second molding module 44; the fourth spring 55 is always in a compressed state. Therefore, during the molding process, the second driving part 53 can ensure the structural stability of the second molding unit 43 under the pressing force of the second stopper 512 and the elastic force of the fourth spring 55. Meanwhile, the elastic force of the fourth spring 55 to the second driving part 53 can ensure that the second molding group 43 is in a stationary stable state during the second driving process.

It will be understood that during the second driving process, the first molding die set 42 performs a centripetal contraction movement, and during the movement, the friction between the first molding die set 42 and the second molding die set 43 generates a centripetal driving force on the second molding die set 43. The elastic force of the fourth spring 55 at this time can offset the generated driving force to ensure the stability of the second molding group 43.

For convenience of understanding, the operation of the core mold 4 will be explained. The traction structure, the driving structure and the connecting structure all adopt a first mode.

(1) Initially, the core mold 4 is in a molding state as shown in fig. 13. The first molding block 41 abuts against an end of the first molding block 42. Meanwhile, the side walls of the first molding die set 42, the second molding die set 43 and the second molding die set 44 are all in a flush state. Meanwhile, the third spring 54 and the fourth spring 55 are both in a compressed state.

(2) A first driving process: as shown in fig. 14, the driving device drives the driving rod 51 to move along the demolding direction, and then the fixture 513 and the slot 410 are engaged to drive the first molding module 41 to move along the demolding direction synchronously until the first molding module 41 is retracted into the cavity 400 and contacts the first driving member 52, so as to complete the demolding of the bottom end surface of the cavity 110. In this process, the driving rod 51 is deflected by the sliding of the guide block 514 along the inclined section of the guide groove 441. Meanwhile, the first stopper 511 moves along with the driving rod 51, so that the third spring 54 extends, but the third spring 54 is still in a compressed state, so as to ensure that the first molding unit 42 and the first driving member 52 are kept still during the first driving process.

(3) A second driving process: the first molding module 41 is abutted against the first driving member 52, so that the first driving member 52 can be driven to move downwards synchronously. During downward movement of the first drive member 52; first, as shown in fig. 15 and 17, the first driving part 52 may drive the first forming block 421 to move a set distance along the end surface of the second forming module 43 toward the center of the cavity 400 by the engagement of the driving block 522 and the driving groove 4210 on the first forming block 421 until the pulling block 4211 at the side of the first forming block 421 contacts the second side of the pulling groove 4220 at the side of the second forming block 422. Subsequently, as shown in fig. 16 and 18, by the abutting engagement of the pulling block 4211 and the pulling groove 4220, the second molding block 422 is driven to move along the connecting groove 401 synchronously with the centripetal movement of the first molding block 421 through the connecting block 4221, so that the first molding unit 42 is contracted into the cavity 400, and the demolding of the first molding unit 42 from the cavity 110 is completed. In this process, the driving rod 51 is deflected by the guide block 514 sliding further along the inclined section of the guide groove 441, and at the end of the second driving process, the guide block 514 is located right at the intersection of the inclined section and the vertical section; at this time, the latch 513 at the end of the driving rod 51 is aligned with the first connecting groove 411 and the second connecting groove 521 in the axial direction. Meanwhile, the first stopper 511 of the driving lever 51 is just in contact with the second driving part 53.

(4) A third driving process: the driving rod 51 moves downwards continuously, and the first stopper 511 and the second driving part 53 are abutted to drive the second driving part 53 to move along the demolding direction. During the movement of the second driving part 53, the process of driving the second molding die set 43 by the second driving part 53 is the same as the process of driving the first molding die set 42 by the first driving part 52, and thus will not be further described. In this process, the driving rod 51 slides along the vertical section of the guide groove 441 through the guide block 514, so that the latch 513 at the end of the driving rod 51 slides along the first communicating groove 411 and the second communicating groove 521 in sequence, and the driving rod 51 is separated from the first molding module 41 and the first driving member 52, respectively, to realize independent driving of the driving rod 51 to the first driving member 52 and the second driving member 53. During this process, the fourth spring 55 continues to be compressed; at the same time, the third spring 54 continues to extend until it is in a natural state.

(5) After the subsequent second process is completed, the core mold 4 is reset. The driving rod 51 is driven by the driving device to move in the reverse direction.

First, at the initial stage of the reverse movement of the driving rod 51, the driving rod 51 slides along the vertical section of the guide groove 441 by the guide block 514 until sliding to the boundary of the vertical section and the inclined section. In this process, the latch 513 at the end of the driving rod 51 can slide into the latch slot 410 along the second communicating groove 521 and the first communicating groove 411 in sequence, and contact with the first molding module 41. In this process, the third spring 54 can move synchronously with the driving rod 51 through the first stopper 511 until the third spring 54 is in a compressed state, but at this time, the elastic force generated by the third spring 54 is smaller than the resistance force generated by the first driving part 52. Meanwhile, the fourth spring 55 can drive the second driving part 53 to perform reset and reverse movement through elasticity; alternatively, the elastic force of the fourth spring 55 is smaller than the resistance to the movement of the second driving member 53, so that the second driving member 53 is kept stationary.

Subsequently, the driving rod 51 slides along the inclined section of the guide groove 441 through the guide block 514, so that the driving rod 51 is deflected while moving in the axial direction, and the latch 513 can be engaged with the latch groove 410. In this process, the first molding module 41 can perform the resetting movement synchronously with the driving rod 51; meanwhile, the third spring 54 is continuously compressed by the first stopper 511 until the elastic force of the third spring 54 is greater than the resistance force applied to the movement of the first driving part 52, so that the first driving part 52 can synchronously perform the reset movement along with the first molding module 41, and the first molding module 41 can continuously move in the reverse direction to reset to the initial position after the first molding module 42 resets to the initial position; to avoid interference. In this process, with the continuous movement of the driving rod 51, until the second stopper 512 abuts against the second driving part 53, the second driving part 53 can be driven to move synchronously with the driving rod 51 until the second forming module 43 is reset to the initial position.

In one embodiment of the present application, in the second process, the square hole 120 at the end of the sidewall of the barrel 100 needs to be demolded, and in order to ensure the demolding quality of the square hole 120, a floating type demolding structure may be provided for demolding.

In the present embodiment, as shown in fig. 19 and 20, the stationary mold 2 is mounted with the oblique guide post 23 on the end surface thereof near the base plate 3; a sliding block 31 is arranged on the movable die in a sliding way; specifically, a slide block 31 is slidably mounted on the side of the substrate 3 along a direction perpendicular to the demolding direction, and the slide block 31 is matched with the inclined guide post 23; a second insert 32 for molding the square hole 120 is slidably mounted on the slide block 31 in the mold release direction. So that the substrate 3 can drive the slide block 31 to move away from the movable mold during the second process. In the process that the slide block 31 is far away from the movable die along with the substrate 3, the slide block 31 can be driven to slide in the vertical demoulding direction relative to the substrate 3 through the matching of the inclined guide post 23 and the slide block 31, and then the second insert 32 is driven to synchronously move along the vertical demoulding direction so as to realize demoulding with the square hole 120. Further, by the engagement of the second insert 32 with the square hole 120, the second insert 32 can slide along the slide 31 in the mold-removal direction while the slide 31 is moving, and can be kept stationary in the vertical mold-removal direction with respect to the square hole 120 after molding.

It is understood that the perfect demolding direction of the square hole 120 is that the second insert 32 moves along the opening direction of the square hole 120; i.e., the moving direction of the second insert 32 is perpendicular to the moving direction of the substrate 3. Therefore, by slidably attaching the second insert 32 to the slider 31, the second insert 32 is always kept flush with the square hole 120 when the second insert 32 is removed from the square hole 120 by engaging with the molded rear hole 120 while the slider 31 moves along with the substrate 3.

In the present embodiment, as shown in fig. 19 and 20, the second insert 32 and the slide block 31 are elastically connected by the second spring 33, so that the second insert 32 slides with respect to the slide block 31 under the elastic force of the second spring 33 during the second process, and is held stationary with the square hole 120 after molding.

It can be understood that the second insert 32 is used for forming the square hole 120 through the end portion, so that in the second process, the engagement position of the square hole 120 with the second insert 32 is far from the mounting position of the second insert 32 and the slide 31, and the second insert 32 is easily locked and cannot float. Therefore, by connecting the second insert 32 and the slide 31 by the second spring 33, the second insert 32 is pushed up by the elastic force of the second spring 33 in the second process, and is kept flush by the engagement of the second insert 32 and the square hole 120.

It will be appreciated by those skilled in the art that during the opening of the mold for the plastic product, the product will shrink due to the temperature reduction, i.e. the product will have a shrinkage rate. In the present application, the square hole 120 is disposed near the opening of the barrel 100, so that the shrinkage degree of the barrel 100 can be represented at the position of the square hole 120 to the maximum extent. In a second process, the square hole 120 moves away from the mold to be removed along with the shrinkage of the barrel 100; further, even if the second insert 32 can be kept floating while being fitted to the fixed mold 2, it interferes with the square hole 120.

In one embodiment of the present application, to further ensure the floating effect of the second insert 32; as shown in fig. 19 and 20. The end surface of the fixed die 2 close to the substrate 3 is provided with a movable cavity 200; a first insert 21 for molding the barrel body 100 is obliquely and slidably installed in the movable chamber 200. The first insert 21 corresponds to the second insert 32 in position, and the first insert 21 and the movable cavity 200 are also elastically connected through a first spring 22; the slide 31 may be wedge-fitted with the first insert 21 by means of a wedge portion 311 provided. When the molding process is performed, the first insert 21 is aligned with the inner wall of the fixed mold 2 under the pressing force of the wedge 311, at which time the first spring 22 is in a stretched or compressed state, and the first insert 21 and the second insert 32 are abutted. When the second process is performed, the slide 31 is away from the first insert 21, and the first insert 21 moves away from the post-mold barrel 100 and the second insert 32 along the movable cavity 200 under the elastic force of the first spring 22, so that a movable gap can be generated between the second insert 32 and the first insert 21 for compensating the shrinkage height of the barrel 100 during the mold opening process.

Specifically, as shown in fig. 19 and 20, a side of the movable cavity 200 away from the base plate 3 is a first inclined surface 201, and the first insert 21 is in sliding fit with the first inclined surface 201; the side of the first insert 21 away from the deep molding cavity is a second inclined surface 211, and the slide block 31 can be in sliding press fit with the second inclined surface 211 through the wedge portion 311. Therefore, during the second process, the slide block 31 can move the wedge part 311 away from the second inclined surface 211, and the first insert 21 can slide along the first inclined surface 201 under the elastic force of the first spring 22, so that a gap with the maximum distance of X can be generated between the end surface of the first insert 21 close to the substrate 3 and the end surface of the fixed mold 2; the value of X is generally 7.5-10mm.

It can be understood that the open mold shrinkage of plastic products is generally 1.5%. Namely, the product with the fall of 500mm needs to shrink by 7.5mm. Therefore, during the mold opening process, it is necessary to generate a clearance for the second insert 32 to float along the square hole 120 by the movement of the first insert 21, and the value of the clearance is at least equal to or greater than the shrinkage height of the product.

It is also understood that the extending direction of the first spring 22 may be parallel to the sliding direction of the first insert 21; the extending direction of the first spring 22 may also be a direction perpendicular to the moving direction of the substrate 3. Meanwhile, when the first insert 21 and the second insert 32 are molded, a movable distance needs to exist between the end surface of the first insert 21 away from the deep molding cavity and the movable cavity 200, and between the wedge portion 311 and the movable cavity 200.

The foregoing has described the principles, principal features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (8)

1. A floating demolding structure, comprising:

the inclined guide post is fixedly arranged on the end surface of the fixed die;

the sliding block is slidably arranged on the movable die; the sliding block is suitable for being matched with the inclined guide post; and

the second insert is mounted on the sliding block in a sliding mode along the demolding direction of the movable mold and used for forming a square hole;

when the demolding process is carried out, the movable mold is suitable for driving the sliding block to move away from the fixed mold; in the process, the second insert is kept static along the sliding of the sliding block and the formed square hole in the demolding direction; meanwhile, the second insert moves synchronously along with the slide block in the direction vertical to demoulding so as to demould the square hole.

2. A floating mold release structure as claimed in claim 1, wherein: the second insert and the sliding block are in elastic connection through a second spring, so that in the demolding process, the second insert slides relative to the sliding block under the elastic force of the second spring and keeps still in the direction perpendicular to demolding direction with the molded square hole.

3. A floating mold release structure as claimed in claim 1, wherein: a first insert used for forming the barrel body is obliquely and slidably installed on the end face of the fixed die; the first insert is elastically connected with the fixed die, and the first insert corresponds to the second insert in position; when the molding process is carried out, the first insert is aligned with the inner wall of the fixed die under the extrusion of the sliding block, and the first insert and the second insert are abutted; when the demolding process is carried out, the sliding block is far away from the first insert, and then the first insert moves away from the molding rear barrel body and the second insert along the fixed die under the elastic force, so that a movable gap can be generated between the second insert and the first insert.

4. A floating mold release structure as claimed in claim 3, wherein: the end surface of the fixed die, which is close to the movable die, is provided with a movable cavity; the first insert is obliquely and slidably arranged in the movable cavity; the slide block is suitable for wedge-shaped matching with the first insert through the arranged wedge-shaped part; when the molding process is carried out, the first insert is aligned with the inner wall of the fixed die under the extrusion of the wedge-shaped part; when the demolding process is carried out, the wedge-shaped part is far away from the first insert, and then the first insert moves away from the molded rear barrel body and the second insert along the movable cavity under the elastic force.

5. The floating demolding structure as claimed in claim 4, wherein: the first insert is connected with the movable cavity through a first spring; when the forming process is carried out, the first spring is in a stretching or compressing state; when demolding is performed, the first insert is adapted to perform a tilt slide along the movable cavity under the elastic force of the first spring.

6. A floating demolding structure as claimed in claim 5, characterized in that: the extending direction of the first spring is the same as the sliding direction of the first insert.

7. A floating mold release structure as claimed in claim 3, wherein: in the demolding process, a movable gap with the maximum distance of X can be formed between the first insert and the end face of the fixed die; the value of X is 7.5-10mm.

8. A floating mold release structure as claimed in any one of claims 1-7, characterized in that: the movable die comprises a base plate, and the sliding block is arranged on the side portion of the base plate in a sliding mode in the direction perpendicular to the demolding direction.

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