Delay elastic block structure and forming die applying same

Abstract

The utility model provides a delay elastic block structure and a forming mold applying the delay elastic block structure. The delay elastic block structure comprises a first elastic block assembly and a second elastic block assembly. The first elastic block assembly comprises a first ejection piece and a first driving piece which are in driving connection, and the first ejection piece is driven by the first driving piece to push excess materials in the ejection direction; the second elastic block assembly comprises a second ejection piece and a second driving piece which are in driving connection, the second ejection piece is in separable contact with the first ejection piece, and the second ejection piece is driven by the second driving piece to reversely abut against the first ejection piece in the ejection direction; the component force of the force applied to the second ejection piece by the second driving piece in the ejection direction is larger than the component force of the force applied to the first ejection piece by the first driving piece in the ejection direction. The forming mold comprises a fixed mold kit, a movable mold kit and a delay elastic block structure. The fixed mold suite and the movable mold suite are separably contacted to define a runner; the first elastic block assembly is connected with the fixed mold sleeve piece, the second elastic block assembly is connected with the movable mold sleeve piece, and the runner and the second elastic block assembly are located on the same side in the ejection direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile parts manufacturing, and in particular to a time-delayed ejector block structure and a forming die applying the same. BACKGROUND

[0002] Injection molding is a widely used manufacturing process in the field of plastic processing. By injecting molten plastic material into a closed mold, the product with the desired shape can be obtained after cooling and solidification. This process plays an important role in modern industry, especially for mass production of complex-shaped plastic products, such as automobile front bumpers. In order to realize injection molding, the forming cavity and the runner of the injection molding are structured to be in communication. After the injection is completed, the product solidified in the forming cavity and the residue solidified in the runner remain connected. During the demolding process, the residue may pull the product, causing the product to be displaced inappropriately in the mold and resulting in the product being scratched by the mold. How to solve the above problems is a consideration for those skilled in the art. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems in the prior art, the present application provides a time-delayed ejector block structure and a forming die applying the same.

[0004] The present application provides a time-delayed ejector block structure, which is applied to a forming die for injection molding. The time-delayed ejector block structure is configured to be able to push the excess material at the runner. The time-delayed ejector block structure comprises a first ejector block assembly and a second ejector block assembly. The first ejector block assembly comprises a first ejector and a first driver connected in drive. The first ejector is used to be driven by the first driver and push the excess material in the ejection direction. The second ejector block assembly comprises a second ejector and a second driver connected in drive. The second ejector is in separable contact with the first ejector. The second ejector is used to be driven by the second driver and resist the first ejector in the ejection direction. The component of the force applied by the second driver to the second ejector in the ejection direction is greater than the component of the force applied by the first driver to the first ejector in the ejection direction.

[0005] It can be understood that the force by which the second driver drives the second ejector to resist the first ejector in the ejection direction is greater, and the force by which the first driver drives the first ejector to resist the excess material in the ejection direction is smaller. Therefore, the second ejector block assembly can resist the first ejector block assembly in the ejection direction, avoiding the first ejector pushing the excess material too fast or too early under the drive of the first driver, so that the first ejector block assembly can delay the pushing of the excess material, avoiding the excess material causing the product to be displaced inappropriately in the forming die, and avoiding the product being scratched.

[0006] In an embodiment, the first ejector and the second ejector are arranged in a stack along the ejecting direction, the first ejector has an ejecting side for contacting the excess material, and the second ejector is detachably abutted against the ejecting side.

[0007] In an embodiment, the first driving member and the second driving member are both elastic elements configured in a compressed state, the first driving member is arranged on a side of the first ejector away from the second spring assembly along the ejecting direction, and the second driving member is arranged on a side of the second ejector away from the first spring assembly along the ejecting direction.

[0008] In an embodiment, the delay spring structure includes one first spring assembly and two second spring assemblies, the two second spring assemblies are arranged at two ends of the first spring assembly along an arrangement direction, the two second ejectors are respectively detachably contacted with the first ejector, the first ejector is located between the two second ejectors along the arrangement direction, and the arrangement direction intersects the ejecting direction.

[0009] The embodiments of the present application also provide a molding die, which includes a fixed die set, a movable die set, and the delay spring structure according to any one of the preceding embodiments. The fixed die set and the movable die set are detachably contacted and enclose the runner, the first spring assembly is movably connected with the fixed die set along the ejecting direction, the second spring assembly is movably connected with the movable die set along the ejecting direction, and the runner and the second spring assembly are located on the same side of the first spring assembly along the ejecting direction.

[0010] It can be understood that the second spring assembly is movably connected with the movable die set, in the initial stage of the separation of the fixed die set and the movable die set, the second driving member drives the second ejector to abut against the first ejector along the ejecting direction, so that the first spring assembly remains stationary. With the separation of the fixed die set and the movable die set, the excess material in the runner has a certain deformation space due to the fact that it is no longer clamped by the fixed die set and the movable die set. The fixed die set and the movable die set continue to separate until the second spring assembly and the first spring assembly have a tendency to separate, and at this time, the first ejector can be driven by the first driving member to realize the delay ejection and push the excess material along the ejecting direction, because the first spring assembly is movably connected with the fixed die set. Because there is enough deformation space around the excess material, the excess material can be deformed when being pushed and will not pull the product connected thereto to move with the first spring assembly, avoiding the inappropriate displacement of the excess material driving the product in the molding die, thereby avoiding the scratching of the product.

[0011] In an embodiment, the second ejector assembly further comprises a second limiting bolt, the second limiting bolt is connected with the movable die set, the second ejector is movably sleeved on the second limiting bolt, the second ejector has a time-delay movement displacement relative to the movable die set along the ejection direction, the second driving member is an elastic element configured in a compressed state, and a compression amount of the second driving member along the ejection direction is greater than the time-delay movement displacement.

[0012] In an embodiment, the second limiting bolt comprises a second connecting end, a second connecting rod and a second abutting end arranged in sequence along the ejection direction, the second connecting end is fixed with the movable die set, the second connecting rod is movably arranged through the second ejector along the ejection direction, and the second abutting end is detachably abutted with a side of the second ejector away from the second driving member along the ejection direction.

[0013] In an embodiment, the first ejector assembly further comprises a first limiting bolt, the first limiting bolt is connected with the fixed die set, the first ejector is movably sleeved on the first limiting bolt, the first limiting bolt and the second ejector assembly are arranged in a stack along the ejection direction, the first driving member and the runner are arranged in a stack along the ejection direction, and the second ejector assembly and the runner are arranged in a stagger along the ejection direction.

[0014] In an embodiment, the time-delay ejector structure further comprises a guide member, the guide member is fixed with the fixed die set, the guide member has a guide arm, the first ejector comprises a guide groove arranged through along the ejection direction, and the guide arm is movably accommodated in the guide groove, so that the guide member and the first ejector are guided and matched.

[0015] In an embodiment, the first ejector comprises a convex portion and a concave portion, the convex portion is arranged protruding along the ejection direction, and the concave portion is arranged recessed along the ejection direction away from the second ejector assembly compared with the convex portion, the second ejector has a recess arranged recessed along the ejection direction, the recess is used for accommodating the convex portion, and the concave portion is used for contacting with the runner. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a general forming die.

[0017] Figure 2 It is a schematic diagram of a general forming die in which product tearing occurs.

[0018] Figure 3 It is a schematic diagram of a forming die provided with a time-delay ejector structure in a closed die state according to an embodiment of the present application.

[0019] Figure 4 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0020] Figure 5 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is ejected.

[0021] Figure 6 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0022] Figure 7 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0023] Figure 8 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. Figure 7 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0024] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. Figure 9 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0025] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. Figure 10 The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0026] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0027] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0028] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0029] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0030] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0031] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0032] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0033] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0034] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0035] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0036] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0037] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0038] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0039] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected. The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.

[0040] The schematic view of the molding die provided by the embodiment of the present application is in the open mold state, and the first ejector assembly is not ejected.Protrusion 15113

[0041] Recess 15114

[0042] Guide groove 15115

[0043] First driving member 1512

[0044] First limiting bolt 1513

[0045] First connecting end 15131

[0046] First connecting rod 15132

[0047] First abutting end 15133

[0048] Second elastic block assembly 152

[0049] Second ejecting member 1521

[0050] Groove 15210

[0051] Second accommodating hole 15211

[0052] Second through hole 15212

[0053] Second driving member 1522

[0054] Second limiting bolt 1523

[0055] Second connecting end 15231

[0056] Second connecting rod 15232

[0057] Second abutting end 15233

[0058] Guide member 154

[0059] Guide arm 1540

[0060] Ejecting direction D

[0061] Arrangement direction L

[0062] Product 2

[0063] Excess material 3

[0064] Injection port 4

[0065] General forming mold 50

[0066] Front mold 51

[0067] Rear mold 52

[0068] Front mold elastic block 53

[0069] gate 54

[0070] pulling position 55

[0071] product appearance surface 56

[0072] automobile front bumper 57

[0073] residue 58

[0074] The following detailed description will further describe the present application in conjunction with the above-mentioned figures. DETAILED DESCRIPTION

[0075] The following description will refer to the accompanying drawings to more fully describe the present application. The drawings show exemplary embodiments of the present application. However, the present application can be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "one" or "said one" are used in this specification and / or claims, they are taken to be open-ended terms that specify the presence of the stated features, integers, steps and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components and / or groups thereof. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0076] Generally, injection molding is a manufacturing process widely applied in the direction of plastic processing, by injecting molten plastic material into a closed mold, after cooling and solidification, the product of the desired shape is obtained. This process plays an important role in modern industry, especially suitable for mass production of complex shape plastic products, such as automobile front bumper. In order to realize injection molding, the molding cavity and flow channel of injection molding are structured to be in communication, after completing injection, the product solidified in the molding cavity and the residue solidified in the flow channel also remain in a connected state. During demolding, the phenomenon of residue pulling the product may occur, which causes the product to be scratched by the mold due to inappropriate displacement of the product in the mold.

[0077] Correspondingly, the application provides a time-delay ejection block structure and a molding die using the same. In one aspect, the time-delay ejection block structure is used in a molding die for injection molding, and is configured to push the excess material at a flow channel. The time-delay ejection block structure comprises a first ejection block assembly and a second ejection block assembly. The first ejection block assembly comprises a first ejector and a first driver connected in driving relationship, and the first ejector is configured to be driven by the first driver and push the excess material in an ejection direction. The second ejection block assembly comprises a second ejector and a second driver connected in driving relationship, and the second ejector is configured to be in separable contact with the first ejector and be driven by the second driver to resist the first ejector in the ejection direction. The force applied by the second driver to the second ejector in the ejection direction is greater than the force applied by the first driver to the first ejector in the ejection direction. In another aspect, the molding die comprises a fixed mold set, a movable mold set, and the time-delay ejection block structure. The fixed mold set and the movable mold set are in separable contact and enclose the flow channel. The first ejection block assembly is movably connected to the fixed mold set in the ejection direction, the second ejection block assembly is movably connected to the movable mold set in the ejection direction, and the flow channel is located on the same side of the first ejection block assembly in the ejection direction.

[0078] Further, the application provides a time-delay ejection block structure and a molding die using the same, which can avoid scratching the product. In one aspect, the force applied by the second driver to the second ejector to resist the first ejector in the ejection direction is greater, and the force applied by the first driver to the first ejector to resist the excess material in the ejection direction is smaller. Therefore, the second ejection block assembly can resist the first ejection block assembly in the ejection direction, avoiding the first ejector from pushing the excess material too fast or too early under the driving of the first driver, so that the first ejection block assembly can push the excess material in time-delay manner, avoiding the excess material from moving the product in the molding die inappropriately, thereby avoiding scratching the product. In another aspect, the second ejection block assembly is movably connected to the movable mold set. In the initial stage of the fixed mold set and the movable mold set being separated from each other, the second driver drives the second ejector to resist the first ejector in the ejection direction, so that the first ejection block assembly remains stationary. As the fixed mold set and the movable mold set are separated, the excess material in the flow channel has a certain deformation space due to the fact that it is no longer clamped by the fixed mold set and the movable mold set. The fixed mold set and the movable mold set continue to separate until the second ejection block assembly and the first ejection block assembly have a tendency to separate. Since the first ejection block assembly is movably connected to the fixed mold set, the first ejector can be driven by the first driver to be ejected in time-delay manner and push the excess material in the ejection direction. Since there is enough deformation space around the excess material, the excess material can be deformed when being pushed and will not pull the product connected thereto to move with the first ejection block assembly, avoiding the excess material from moving the product in the molding die inappropriately, thereby avoiding scratching the product.

[0079] Generally, as shown in Figure 1 and Figure 2 shown, Figure 1 is a structural schematic diagram of a general forming mold 50, Figure 2 is a schematic diagram of product tear of the general forming mold 50. In order to improve the aesthetic degree of the automobile front bumper 57, the parting line is usually left inside the product, which causes the automobile front bumper 57 to be left on the front mold 51 side during the mold opening process; at the same time, in order to further improve the aesthetic degree of the automobile front bumper 57, the gate 54 (the communication place between the forming cavity and the runner) on the automobile front bumper 57 is avoided from being exposed, and a counterbore groove accommodating the gate 54 needs to be designed at a suitable position. The height difference generated by the self concave of the counterbore groove and the distance difference between the counterbore groove and the product appearance surface 56 make the gate 54 not easy to be perceived by general users. However, this will inevitably cause a large amount of undercut between the gate 54 and the edge of the product appearance surface 56, and a front mold ejector block 53 moving in the oblique downward direction needs to be designed to help realize the undercut escape, so as to reduce the undercut amount between the automobile front bumper 57 and the front mold 51.

[0080] However, in the early stage of the mold opening process, since the residual material 58 is close to the side of the rear mold 52 without deformation space, the residual material 58 cannot effectively avoid after being pushed by the front mold ejector block 53, and moves obliquely downward with the rear mold ejector block 53, which causes the automobile front bumper 57 to have an oblique downward movement trend or to move obliquely downward, which may cause the automobile front bumper 57 to partially separate from the front mold 51, the undercut structure on the front mold 51 may scratch the automobile front bumper 57, and the automobile front bumper 57 is torn (the tear position 55 is roughly shown in the figure), thereby affecting the yield.

[0081] It can be understood that, under the premise of maintaining the automobile front bumper product to have a relatively beautiful and aesthetic design, the second ejector block assembly is arranged to abut against the first ejector block assembly in the ejection direction, so that the time-delay ejector block structure has a time-delay ejection function, and the residual material is avoided from being pushed by the ejector block in the early stage of the mold opening; after the mold sleeve assembly and the movable mold sleeve assembly are separated to provide sufficient deformation space for the residual material, the residual material is pushed by the first ejector block assembly to rotate relative to the product, and the first ejector block assembly is demolded, which not only reduces the undercut amount to facilitate the subsequent product demolding, but also avoids the product from being pulled by the residual material to cause the product to be scratched.

[0082] The following description of example embodiments will be made with reference to the accompanying drawings. It should be noted that the components depicted in the accompanying drawings are not necessarily shown to scale; and identical or similar components will be denoted by identical or similar reference numerals or similar technical terms.

[0083] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0084] AsFigures 3 to 5 As shown, the embodiment of the present application provides a delay spring block structure 15 and a molding die 10 applying the same. Figure 3 The figure shows the molding die 10 applying the delay spring block structure 15 in the closed mold state. Figure 4 The figure shows the molding die 10 applying the delay spring block structure 15 in the open mold state, at which time the first spring block assembly 151 is not ejected. Figure 5 The figure shows the molding die 10 applying the delay spring block structure 15 in the open mold state, at which time the first spring block assembly 151 is ejected.

[0085] In an embodiment, the molding die 10 comprises a fixed mold set 11, a movable mold set 12 and a delay spring block structure 15. The fixed mold set 11 and the movable mold set 12 are separably connected and enclose a flow channel 14; the first spring block assembly 151 is movably connected with the fixed mold set 11 in the ejection direction D, the second spring block assembly 152 is movably connected with the movable mold set 12 in the ejection direction D, and the flow channel 14 and the second spring block assembly 152 are located on the same side of the first spring block assembly 151 in the ejection direction D.

[0086] It can be understood that the molding die 10 can be applied to the injection molding process to form a product 2 (for example, an automobile front bumper). The fixed mold set 11 and the movable mold set 12 are closed and enclose a continuous molding cavity 13 and a flow channel 14, the molding cavity 13 is used for molding the product 2, and the flow channel 14 is used for communication with the injection port 4 to enable the molding material (for example, resin) to be injected into the molding cavity 13 through the flow channel 14. The molding material in the molding cavity 13 is molded to obtain the product 2, and the molding material in the flow channel 14 is solidified to become the excess material 3 (or understood as the residue), and the product 2 is connected with the excess material 3. It can be understood by those skilled in the art that the fixed mold set 11 or the movable mold set 12 can be multiple blocks, or the molding die 10 can comprise other mold components cooperating with the fixed mold set 11 and the movable mold set 12, which are not described here.

[0087] In an embodiment, the time-delayed ejector structure 15 is applied to the injection molding mold 10, and the time-delayed ejector structure 15 is configured to push the excess material 3 at the runner 14. The time-delayed ejector structure 15 includes a first ejector assembly 151 and a second ejector assembly 152. The first ejector assembly 151 includes a first ejector 1511 and a first driver 1512 in driving connection, the first ejector 1511 is configured to be driven by the first driver 1512 and push the excess material 3 in the ejection direction D. The second ejector assembly 152 includes a second ejector 1521 and a second driver 1522 in driving connection, the second ejector 1521 is in separable contact with the first ejector 1511, and the second ejector 1521 is configured to be driven by the second driver 1522 and resist the first ejector 1511 in the ejection direction D reversely. The force applied by the second driver 1522 to the second ejector 1521 in the ejection direction D is greater than the force applied by the first driver 1512 to the first ejector 1511 in the ejection direction D.

[0088] It can be understood that the force applied by the second driver 1522 to the second ejector 1521 in the ejection direction D is greater, and the force applied by the first driver 1512 to the first ejector 1511 in the ejection direction D is smaller. Therefore, the second ejector assembly 152 can resist the first ejector assembly 151 in the ejection direction D reversely, so as to avoid the first ejector 1511 from pushing the excess material 3 too fast or too early under the driving of the first driver 1512, and the first ejector assembly 151 can delay pushing the excess material 3, so as to avoid the product 2 from being scratched due to the displacement of the product 2 and the excess material 3 in the injection molding mold 10.

[0089] Further combining Figure 6 It can be understood that the force applied by the second driver 1522 to the second ejector 1521 in the ejection direction D is greater, and the force applied by the first driver 1512 to the first ejector 1511 in the ejection direction D is smaller. Therefore, the second ejector assembly 152 can resist the first ejector assembly 151 in the ejection direction D reversely, so as to avoid the first ejector 1511 from pushing the excess material 3 too fast or too early under the driving of the first driver 1512, and the first ejector assembly 151 can delay pushing the excess material 3, so as to avoid the product 2 from being scratched due to the displacement of the product 2 and the excess material 3 in the injection molding mold 10.

[0090] It can be understood that at least one side of the first ejector 1511 in the ejection direction D is configured to be arranged towards the runner 14, so that the first ejector 1511 can push the excess material 3. The ejection side 15110 is a side of the first ejector 1511 configured to be arranged towards the runner 14 and used to eject the excess material 3, and the second ejector 1521 is in contact with the ejection side 15110 reversely, so as to avoid the first ejector 1511 from pushing the excess material 3 too early or too fast.

[0091] In the embodiment, the flow channel 14 is arranged away from the second ejector 1521, and in other embodiments, the flow channel 14 can be arranged between the first ejector 1511 and the second ejector 1521 along the ejection direction D, and the structure of the flow channel 14 is adjusted to ensure that the injection molding process can be implemented. Those skilled in the art can understand that this is certainly possible, and thus will not be described here.

[0092] In an embodiment, the first driving member 1512 is arranged on the side of the first ejector 1511 away from the second spring assembly 152 along the ejection direction D, and the second driving member 1522 is arranged on the side of the second ejector 1521 away from the first spring assembly 151 along the ejection direction D.

[0093] In the embodiment, the first driving member 1512 and the second driving member 1522 are both elastic elements configured in a compressed state, which can be springs, elastic rubber rods, or other elastic bodies. In other embodiments, the first driving member 1512 and the second driving member 1522 can also be electromagnetic springs or cylinders that can perform linear motion, and those skilled in the art can understand that this is certainly possible, and thus will not be described here.

[0094] It can be understood that the first driving member 1512 and the second driving member 1522 are configured to provide a force along the ejection direction D. When the first driving member 1512 and the second driving member 1522 are elastic elements in a compressed state, the first driving member 1512 and the second driving member 1522 compressed along the ejection direction D can provide a reverse elastic force along the ejection direction D. The first driving member 1512 is compressed along the ejection direction D toward the side of the fixed die assembly 11, and the first driving member 1512 exerts a reverse driving force along the ejection direction D on the first ejector 1511, so that the first driving member 1512 has a tendency to move away from the fixed die assembly 11 along the ejection direction D, and thus the first ejector 1511 can push the excess material 3. Similarly, the second driving member 1522 is compressed along the ejection direction D toward the side of the movable die assembly 12, and the second driving member 1522 exerts a reverse driving force along the ejection direction D on the second ejector 1521, so that the second driving member 1522 has a tendency to move away from the movable die assembly 12 along the ejection direction D, and thus the second ejector 1521 can press the first ejector 1511.

[0095] In an embodiment, the first driving member 1512 is arranged on the side of the first ejector 1511 away from the second spring assembly 152 along the ejection direction D, and the second driving member 1522 is arranged on the side of the second ejector 1521 away from the first spring assembly 151 along the ejection direction D. Figures 3 to 5 The working process of the delay spring structure 15 and the molding die 10 using the same according to the embodiments of the present application is shown.

[0096] Further combining Figure 3As shown, the fixed mold set 11 and the movable mold set 12 are closed. The first ejector assembly 151 is connected with the fixed mold set 11, the first ejector 1511 is accommodated in the first accommodating cavity 110 of the fixed mold set 11, and the first driving member 1512 is in the maximum compression state. The second ejector assembly 152 is connected with the movable mold set 12, the second ejector 1521 is accommodated in the second accommodating cavity 120 of the movable mold set 12, and the second driving member 1522 is in the maximum compression state.

[0097] Further combined Figure 4 As shown, the fixed mold set 11 and the movable mold set 12 are opened. The movable mold set 12 is separated from the fixed mold set 11 at least in the ejection direction D, the force of the movable mold set 12 pressing the second ejector assembly 152 decreases or is cancelled, the second driving member 1522 is appropriately stretched and pushes the second ejector 1521 in the ejection direction D, the second ejector 1521 can be out of the second accommodating cavity 120 and continuously press the first ejector 1511. The first ejector 1511 continues to be accommodated in the first accommodating cavity 110 of the fixed mold set 11 under pressure, the first driving member 1512 is in the maximum compression state, and the excess material 3 is not pushed by the first ejector assembly 151.

[0098] Further combined Figure 5 As shown, the fixed mold set 11 and the movable mold set 12 continue to open. The movable mold set 12 and the fixed mold set 11 continue to separate at least in the ejection direction D until the second ejector assembly 152 moves with the movable mold set 12 to have a tendency to be out of contact or be out of contact with the first ejector assembly 151. The force of the second ejector 1521 pressing the first ejector assembly 151 is cancelled, the first driving member 1512 is stretched and pushes the first ejector 1511 in the ejection direction D, the first ejector 1511 can be out of the first accommodating cavity 110 and push the excess material 3. The runner 14 is deformed under the action of the first ejector 1511, and because there is enough deformation space, the runner 14 is under small stress at this time, the product 2 does not come off the fixed mold set 11, and the product 2 is prevented from being scratched.

[0099] That is, the second ejector assembly 152 is movably connected with the movable die set 12, and in the initial stage of the mold opening, the second ejector assembly 152 is driven by the second driving member 1522 to abut against the first ejector assembly 151 along the ejection direction D, so that the first ejector assembly 151 remains stationary. As the fixed die set 11 and the movable die set 12 are separated, the excess material 3 in the flow channel 14 has a certain deformation space due to the fact that it is no longer clamped by the fixed die set 11 and the movable die set 12. The fixed die set 11 and the movable die set 12 continue to separate until the second ejector assembly 152 is separated from the first ejector assembly 151. Since the first ejector assembly 151 is movably connected with the fixed die set 11, the first ejector assembly 151 can be driven by the first driving member 1512 to achieve a delayed ejection, and the first ejector assembly 151 can push the excess material 3 along the ejection direction D. Since there is enough deformation space around the excess material 3, the excess material 3 can be deformed when it is pushed and will not pull the product 2 connected thereto to move with the first ejector assembly 151, thereby avoiding the displacement of the product 2 caused by the excess material 3 in the molding die 10, and avoiding the scratching of the product 2.

[0100] It can be understood that, while maintaining the front bumper product of the automobile, the second ejector assembly 152 abuts against the first ejector assembly 151 along the ejection direction D, so that the delayed ejector structure 15 has a delayed ejection function, and the excess material 3 is not pushed by the first ejector assembly 151 in the initial stage of the mold opening; after the fixed die set 11 and the movable die set 12 are separated to make the excess material 3 have enough deformation space, the excess material 3 is pushed by the first ejector assembly 151 to rotate compared with the product 2, and the first ejector assembly 151 is demolded, which not only reduces the amount of reverse buckling to facilitate the subsequent product demolding process, but also avoids the product 2 from being pulled by the excess material 3 to cause the scratching of the product 2.

[0101] It should be explained that the aforementioned "the first driving member 1512 is in the maximum compression state" refers to the maximum compression state of the first driving member 1512 caused by the clamping of the first ejector assembly 151 and the fixed die set 11, and is not limited to the maximum compression limit of the first driving member 1512 caused by the structure and / or material of the first driving member 1512. Similarly, the aforementioned "the second driving member 1522 is in the maximum compression state" refers to the maximum compression state of the second driving member 1522 caused by the clamping of the second ejector assembly 152 and the movable die set 12, and is not limited to the maximum compression limit of the second driving member 1522 caused by the structure and / or material of the second driving member 1522.

[0102] Further combining Figures 6 to 10 It is shown that the embodiment of the present application provides a specific structure of the delayed ejector structure 15 and the molding die 10 applying the same. Figure 6 It is shown that the embodiment of the present application provides a specific structure of the delayed ejector structure 15 and the molding die 10 applying the same. Figure 7A perspective view of the delay elastic block structure 15 from another angle according to an embodiment of the present application. Figure 8 A perspective view of the delay elastic block structure 15 from another angle according to an embodiment of the present application. Figure 7 A sectional view along the VIII-VIII direction. Figure 9 A perspective view of the delay elastic block structure 15 from another angle according to an embodiment of the present application. Figure 10 A perspective view of the delay elastic block structure 15 from another angle according to an embodiment of the present application.

[0103] It should be explained that the present application Figure 9 The present application Figure 10 The present application

[0104] In an embodiment, the first elastic block assembly 151 further comprises a first limiting bolt 1513, the first limiting bolt 1513 is used to connect with the fixed die set 11, and the first ejector 1511 is movably sleeved on the first limiting bolt 1513, so that the first ejector 1511 can be movably connected with the fixed die set 11.

[0105] In an embodiment, the first limiting bolt 1513 comprises a first connecting end 15131, a first connecting rod 15132 and a first abutting end 15133 arranged in sequence along the ejecting direction D, the first connecting end 15131 is fixed with the fixed die set 11, the first connecting rod 15132 is movably arranged through the first ejector 1511 along the ejecting direction D, and the first abutting end 15133 is detachably abutted with a side of the first ejector 1511 away from the first driving member 1512 along the ejecting direction D.

[0106] In the present embodiment, the first ejector 1511 comprises a first through hole 15112 and a first accommodating hole 15111. The first through hole 15112 is a through hole penetrating through the first ejector 1511 along the ejecting direction D, and the first connecting rod 15132 is arranged through the first ejector 1511 via the first through hole 15112. The first accommodating hole 15111 is a blind hole recessed from the first ejector 1511 along the ejecting direction D, and the first driving member 1512 is accommodated in the first accommodating hole 15111, so that the two ends of the first driving member 1512 are respectively abutted with the fixed die set 11 and the first ejector 1511. The first driving member 1512 can push the first ejector 1511 to move along the ejecting direction D to realize the inverted buckle demolding, and at the same time, the first ejector 1511 is driven by the first driving member 1512 to move along the ejecting direction D to abut with the first abutting end 15133 to avoid the first elastic block assembly 151 from completely separating from the fixed die set 11.

[0107] In an embodiment, the second ejector assembly 152 further comprises a second limiting bolt 1523, the second limiting bolt 1523 is configured to be connected with the movable die set 12, and the second ejector 1521 is movably sleeved on the second limiting bolt 1523, so that the second ejector 1521 is movably connected with the movable die set 12. The second ejector 1521 has a time-delay movement displacement amount relative to the movable die set 12 along the ejection direction D, and the compression amount of the second driving member 1522 along the ejection direction D is greater than the time-delay movement displacement amount.

[0108] In an embodiment, the second limiting bolt 1523 comprises a second connecting end 15231, a second connecting rod 15232 and a second abutting end 15233 arranged in sequence along the ejection direction D, the second connecting end 15231 is fixed with the movable die set 12, the second connecting rod 15232 is movably arranged through the second ejector 1521 along the ejection direction D, and the second abutting end 15233 is detachably abutted with a side of the second ejector 1521 away from the second driving member 1522 along the ejection direction D.

[0109] It can be understood that the "time-delay movement displacement amount" refers to the linear distance that the second ejector 1521 can move along the ejection direction D without being separated from the second limiting bolt 1523. The "compression amount" of the second driving member 1522 along the ejection direction D can be equivalent to the linear distance that the second driving member 1522 can be elongated along the ejection direction D after the external force applied to the second ejector assembly 152 is removed.

[0110] In the embodiment, the second ejector 1521 comprises a second through hole 15212 and a second accommodating hole 15211. The second through hole 15212 is a through hole penetrating through the second ejector 1521 along the ejection direction D, and the second connecting rod 15232 is arranged through the second ejector 1521 via the second through hole 15212. The second accommodating hole 15211 is a blind hole recessed from the second ejector 1521 along the ejection direction D, and the second driving member 1522 is accommodated in the second accommodating hole 15211, so that the two ends of the second driving member 1522 are respectively abutted with the movable die set 12 and the second ejector 1521. The second driving member 1522 can drive the second ejector 1521 to move along the ejection direction D to compress the first ejector 1511, and at the same time, the second ejector 1521 is driven by the second driving member 1522 to move along the ejection direction D to abut with the second abutting end 15233, so as to avoid the second ejector assembly 152 from being completely separated from the movable die set 12, and make the second ejector assembly 152 move with the movable die set 12.

[0111] In an embodiment, the delay spring structure 15 comprises a first spring assembly 151 and two second spring assemblies 152, the two second spring assemblies 152 are arranged at two ends of the first spring assembly 151 along the arrangement direction L. The two second ejectors 1521 are respectively in separable contact with a first ejector 1511, the first ejector 1511 is arranged between the two second ejectors 1521 along the arrangement direction L and used to contact and push the excess material 3, and the arrangement direction L intersects with the ejecting direction D.

[0112] In the embodiment, the flow channel 14 is arranged between the two second ejectors 1521 along the arrangement direction L, the middle part of the first ejector 1511 is used to contact and push the excess material 3, and the two ends of the first ejector 1511 are respectively in contact with the two second ejectors 1521 and are synchronously pushed by the two second ejectors 1521, so as to improve the stability of the movement of the first ejector 1511 along the ejecting direction D.

[0113] It can be understood that the two second spring assemblies 152 have the same structure and are symmetrically arranged compared with the first spring assembly 151, so as to improve the stability. When one first spring assembly 151 corresponds to multiple second spring assemblies 152, the component of the force (or the resultant force) applied to the second ejector 1521 by the one or more second driving members 1522 along the ejecting direction D is greater than the component of the force applied to the first ejector 1511 by the first driving member 1512 along the ejecting direction D. In other embodiments, when multiple first spring assemblies 151 correspond to multiple second spring assemblies 152, the component of the resultant force applied to the first ejector 1511 by the multiple first driving members 1512 along the ejecting direction D is greater than the component of the resultant force applied to the first ejector 1511 by the multiple second driving members 1522 along the ejecting direction D.

[0114] In an embodiment, the first limiting bolt 1513 and the second spring assembly 152 are arranged in a stack along the ejecting direction D, the first driving member 1512 and the flow channel 14 are arranged in a stack along the ejecting direction D, and the second spring assembly 152 and the flow channel 14 are arranged in a staggered manner along the ejecting direction D.

[0115] It can be understood that the first limiting bolt 1513 and the second spring assembly 152 are arranged in a stack along the ejecting direction D, so as to improve the stability of the first ejector 1511 being fixed under pressure. The second spring assembly 152 and the flow channel 14 are arranged in a staggered manner along the ejecting direction D, and the first driving member 1512 and the flow channel 14 are arranged in a stack along the ejecting direction D, so as to avoid the interference of the second spring assembly 152 to the excess material 3 in the process of being pushed by the first ejector 1511.

[0116] In the embodiment, the arrangement direction L is perpendicular to the ejecting direction D; in other embodiments, the arrangement direction L and the ejecting direction D can also have other intersection angles.

[0117] In the embodiment, the first ejector assembly 151 comprises a first ejector 1511, two first driving members 1512, and two first limiting bolts 1513. The two first limiting bolts 1513 are arranged at two ends of the first ejector 1511 along the arrangement direction L and correspond to the second ejector 1521 along the ejecting direction D. The two first driving members 1512 are arranged between the two first limiting bolts 1513 along the arrangement direction L and correspond to the runner 14 and the excess material 3 along the ejecting direction D.

[0118] In the embodiment, each second ejector assembly 152 comprises a second ejector 1521, two second driving members 1522, and a second limiting bolt 1523 arranged between the two second driving members 1522 along the arrangement direction L. The two second driving members 1522 are arranged at two ends of the second ejector 1521 along the arrangement direction L, and one of the two second driving members 1522 corresponds to the first ejector 1511 along the ejecting direction D.

[0119] In an embodiment, the first ejector 1511 comprises a protruding portion 15113 and a recessed portion 15114. The protruding portion 15113 is arranged protruding along the ejecting direction D, and the recessed portion 15114 is arranged recessed compared to the protruding portion 15113 along the ejecting direction D away from the second ejector assembly 152. The second ejector 1521 has a groove 15210 arranged recessed along the ejecting direction D, which is used to accommodate the protruding portion 15113, and the recessed portion 15114 is used to contact the runner 14.

[0120] In the embodiment, one ejector corresponds to two protruding portions 15113 at two ends along the arrangement direction L, and the two second limiting bolts 1523 are arranged corresponding to the two protruding portions 15113, and the two second driving members 1522 are arranged corresponding to the groove 15210. One of the two second limiting bolts 1523 is arranged corresponding to the groove 15210.

[0121] It can be understood that the protruding portion 15113 is arranged closer to the groove 15210 compared to the runner 14 and the excess material 3 along the ejecting direction D, forming a coordination structure, which is used to improve the alignment accuracy of the first ejector 1511 and the second ejector 1521.

[0122] In an embodiment, the time-delay spring structure 15 further comprises a guide member 154 fixed with the mold sleeve assembly 11. The guide member 154 has a guide arm 1540, and the first ejector 1511 is provided with a guide groove 15115 penetrating along the ejecting direction D. The guide arm 1540 is movably accommodated in the guide groove 15115, so that the guide member 154 is guided and matched with the first ejector 1511.

[0123] In the embodiment, the number of the guide members 154 can be two, and the two guide members 154 are symmetrically arranged on both sides of the first ejection member 1511 along the arrangement direction L, and are used to improve the movement stability of the first ejection member 1511 along the ejection direction D.

[0124] It can be understood that, for the delay elastic block structure 15 provided by the embodiment of the application and the molding die 10 applying the same, the problem that the product is scratched by the die can be avoided or solved; meanwhile, the delay elastic block structure 15 moves with the opening of the die, and the production cycle is not increased; in addition, the delay elastic block structure 15 and the molding die 10 applying the same also have the advantages of stable structure, not easy to be damaged, convenient to process, low cost, and easy to realize.

[0125] In the foregoing, the specific embodiments of the application are described with reference to the drawings. However, those skilled in the art can understand that various changes and replacements can be made to the specific embodiments of the application without departing from the spirit and scope of the application. These changes and replacements are within the scope defined by the application.

Claims

1. A delay block structure, characterized by, The time-delayed elastic block structure is applied to a molding die for injection molding, and is configured to push the excess material at a flow channel. The first elastic block assembly includes a first ejector and a first driving element in driving connection, the first ejector being configured to be driven by the first driving element and to push the excess material in an ejecting direction; The second elastic block assembly includes a second ejector and a second driving element in driving connection, the second ejector being configured to be driven by the second driving element and to counter the first ejector in the ejecting direction reversely; The second driving element applies a force to the second ejector, and the component force of the force in the ejecting direction is greater than the component force of the force applied by the first driving element to the first ejector in the ejecting direction.

2. The delay block structure of claim 1, wherein, The first ejector and the second ejector are arranged in a stack in the ejecting direction, the first ejector has an ejecting side configured to contact the excess material, and the second ejector is configured to counter the ejecting side separably.

3. The delay block structure of claim 1, wherein The first driving element and the second driving element are both configured as elastic elements in a compressed state, the first driving element is arranged on a side of the first ejector away from the second elastic block assembly in the ejecting direction, and the second driving element is arranged on a side of the second ejector away from the first elastic block assembly in the ejecting direction.

4. The delay block structure of claim 1, wherein The time-delayed elastic block structure includes one first elastic block assembly and two second elastic block assemblies, the two second elastic block assemblies are arranged at two ends of the first elastic block assembly in an arrangement direction, the two second ejectors are configured to contact the first ejector separably, and the first ejector is arranged in a region between the two second ejectors in the arrangement direction to contact the excess material, the arrangement direction intersects the ejecting direction.

5. A forming mold characterized by, The time-delayed elastic block structure includes one first elastic block assembly and two second elastic block assemblies, the two second elastic block assemblies are arranged at two ends of the first elastic block assembly in an arrangement direction, the two second ejectors are configured to contact the first ejector separably, and the first ejector is arranged in a region between the two second ejectors in the arrangement direction to contact the excess material, the arrangement direction intersects the ejecting direction. The time-delayed elastic block structure includes one first elastic block assembly and two second elastic block assemblies, the two second elastic block assemblies are arranged at two ends of the first elastic block assembly in an arrangement direction, the two second ejectors are configured to contact the first ejector separably, and the first ejector is arranged in a region between the two second ejectors in the arrangement direction to contact the excess material, the arrangement direction intersects the ejecting direction. The time-delayed elastic block structure includes one first elastic block assembly and two second elastic block assemblies, the two second elastic block assemblies are arranged at two ends of the first elastic block assembly in an arrangement direction, the two second ejectors are configured to contact the first ejector separably, and the first ejector is arranged in a region between the two second ejectors in the arrangement direction to contact the excess material, the arrangement direction intersects the ejecting direction. The time-delayed elastic block structure includes one first elastic block assembly and two second elastic block assemblies, the two second elastic block assemblies are arranged at two ends of the first elastic block assembly in an arrangement direction, the two second ejectors are configured to contact the first ejector separably, and the first ejector is arranged in a region between the two second ejectors in the arrangement direction to contact the excess material, the arrangement direction intersects the ejecting direction.

6. The forming mold of claim 5, wherein The time-delayed elastic block structure includes one first elastic block assembly and two second elastic block assemblies, the two second elastic block assemblies are arranged at two ends of the first elastic block assembly in an arrangement direction, the two second ejectors are configured to contact the first ejector separably, and the first ejector is arranged in a region between the two second ejectors in the arrangement direction to contact the excess material, the arrangement direction intersects the ejecting direction.

7. The forming mold of claim 6, wherein The second limiting bolt comprises a second connecting end, a second connecting rod and a second abutting end arranged in sequence along the ejection direction, the second connecting end is fixed with the movable mold sleeve, the second connecting rod is movably arranged through the second ejector along the ejection direction, and the second abutting end is detachably abutted with the second ejector away from the side of the second driving element along the ejection direction.

8. The forming mold of claim 6, wherein, The first spring block assembly further comprises a first limiting bolt connected with the fixed mold sleeve, the first ejector is movably sleeved on the first limiting bolt, the first limiting bolt and the second spring block assembly are arranged in layers along the ejection direction, and the first driving element and the flow channel are arranged in layers along the ejection direction.

9. The forming mold of claim 5, wherein, The delay spring block structure further comprises a guide element fixed with the fixed mold sleeve, the guide element has a guide arm, the first ejector comprises a guide groove arranged through along the ejection direction, and the guide arm is movably accommodated in the guide groove, so that the guide element is guided and matched with the first ejector.

10. The forming mold of claim 5, wherein, The first ejector comprises a convex part and a concave part, the convex part is protrudingly arranged along the ejection direction, the concave part is recessedly arranged along the ejection direction away from the side of the second spring block assembly compared with the convex part, the second ejector has a recess arranged recessedly along the ejection direction, the recess is used for accommodating the convex part, and the concave part is used for contacting with the flow channel.

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