Injection mold for corrugated pipe production

Abstract

The utility model belongs to injection mold technical field, concretely relates to a corrugated pipe production is with injection mold, and this mold includes: the lower mould, its upper surface sets up at least one core mould, the middle mould includes a pair of mould part that sets up symmetrically, the opposite surface of mould part is equipped with recess, and the recess forms injection cavity when two mould parts close mould and surround core mould, and the outside wall of mould part is equipped with the sliding block of splayed shape symmetrically, and the bottom surface is equipped with the guide rail that cross section is T type, the inside wall of opening mould drive frame is equipped with the sliding slot that is slidably connected with the sliding block, wherein, the upper surface of lower mould is equipped with the guide slot that is slidably connected with the guide rail, when opening mould drive frame vertical lift, the sliding slot extrusion sliding block generates horizontal component force to drive two mould parts along the guide slot and translate back to take corrugated pipe and will not cause its and the inner wall of injection cavity produce friction, thereby avoided the damage of corrugated pipe when injection mold demoulding.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to an injection mold for corrugated pipe production. Background Technology

[0002] Corrugated pipes, as tubular products with a ring-shaped corrugated structure, are widely used in building drainage, industrial pipe connections, and automotive wiring harness protection due to their excellent flexibility, extensibility, and pressure resistance. Injection molding is the mainstream process for manufacturing corrugated pipes, directly forming the corrugated structure through a mold cavity, offering advantages such as high efficiency and dimensional stability. However, traditional injection molds generally consist of an upper mold and a lower mold, with a groove in the lower mold containing a core mold, forming the injection cavity. After injection molding, the corrugated pipe is embedded in the core mold, requiring a large ejection force during demolding, which can easily cause friction between the corrugated pipe and the inner wall of the injection cavity, leading to damage to the corrugated pipe.

[0003] Therefore, how to avoid damage to the bellows during demolding caused by the injection mold used in bellows production is a technical problem that urgently needs to be solved by those skilled in the art. It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0004] This disclosure provides at least one injection mold for corrugated pipe production.

[0005] In a first aspect, embodiments of this disclosure provide an injection mold for corrugated pipe production, comprising: The lower mold has at least one core mold on its upper surface; The middle mold includes a pair of symmetrically arranged parting molds, with grooves on the opposite surfaces of the parting molds. When the two parting molds are closed, the grooves enclose the core mold to form an injection cavity; and the outer side wall of the parting molds is symmetrically provided with figure-eight shaped sliders, and the bottom surface is provided with a guide rail with a T-shaped cross-section. The mold opening drive frame has a groove on its inner side wall that slides with the slider; The upper surface of the lower mold is provided with a guide groove that slides with the guide rail; when the mold opening drive frame is vertically raised, the groove squeezes the slider to generate a lateral force, thereby driving the two molds to move backward along the guide groove.

[0006] In one alternative implementation, the extension direction of the guide rail and guide groove is perpendicular to the axis at the middle of the mold parting.

[0007] In one alternative embodiment, the outer wall of the mold opening drive frame is symmetrically provided with support members to facilitate gripping by the robot arm.

[0008] In one optional embodiment, the core mold is circumferentially arranged with a plurality of nitrogen injection ports, and the lower mold is provided with a nitrogen delivery pipe communicating with the nitrogen injection ports.

[0009] In one alternative embodiment, the nitrogen injection port is inclinedly disposed on the upper surface of the mandrel so that the injected gas flow enters the trough region of the bellows.

[0010] Secondly, embodiments of this disclosure also provide an injection mold, comprising: The lower mold has at least one core mold on its upper surface; The middle mold includes a pair of symmetrically arranged parting molds, and the opposite surfaces of the parting molds are provided with grooves. When the two parting molds are closed, the grooves surround the core mold to form an injection cavity. The mold opening drive frame is equipped with a transmission mechanism that is linked to the mold parting mechanism; The bottom surface of the mold parting is provided with a guide rail with a T-shaped cross-section, and the upper surface of the lower mold is provided with a guide groove that slides with the guide rail. During demolding, the transmission mechanism is adapted to provide a lateral driving force to the mold parting to drive the two mold parts to translate backward along the guide groove.

[0011] In one optional embodiment, the transmission mechanism includes a figure-eight shaped slide groove symmetrically arranged on the inner side wall of the mold opening drive frame, and a slider matching the shape of the slide groove is symmetrically arranged on the outer side wall of the mold parting frame. When the mold opening drive frame is vertically raised, the chute extrusion slider generates a lateral force to drive the two molds to move backward along the guide groove.

[0012] In one alternative implementation, the extension direction of the guide rail and guide groove is perpendicular to the axis at the middle of the mold parting.

[0013] In one alternative embodiment, the outer wall of the mold opening drive frame is symmetrically provided with support members to facilitate gripping by the robot arm.

[0014] In one optional embodiment, the core mold is provided with a nitrogen injection port, and the lower mold is provided with a nitrogen delivery pipe communicating with the nitrogen injection port.

[0015] The beneficial effect of this utility model is that the injection mold for corrugated pipe production is provided with a separable middle mold. The pair of parting molds of the middle mold and the core mold on the lower mold form an injection cavity. When the mold opening drive frame is lifted vertically, the slide groove on the mold opening drive frame squeezes the sliders on both sides of the middle mold to generate a lateral force, so as to drive the two parting molds to move backward along the guide groove, exposing the corrugated pipe sleeved on the core mold. When the corrugated pipe is taken out, it will not cause friction with the inner wall of the injection cavity, thereby avoiding damage to the corrugated pipe when the injection mold is demolded.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A perspective view of an injection mold for corrugated pipe production provided in an embodiment of this disclosure; Figure 2 A side view of an injection mold for corrugated pipe production provided in an embodiment of this disclosure; Figure 3 This is a top view of the lower mold of an injection mold for corrugated pipe production, provided in an embodiment of this disclosure.

[0020] In the picture: 100. Middle mold; 110. Mold parting; 111. Groove; 112. Slider; 113. Guide rail; 200. Lower mold; 210. Core mold; 211. Nitrogen injection port; 220. Guide groove; 230. Nitrogen delivery pipe; 300. Mold opening drive frame; 310. Slide groove; 320. Support component. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0023] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0024] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0025] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0026] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0027] Research has revealed the following drawbacks of existing technologies: Traditional injection molds typically consist of an upper mold and a lower mold. The lower mold has a groove, within which a core mold is placed, forming an injection cavity. After the corrugated tube is injection molded, it is embedded in the core mold. Demolding requires a significant ejection force, which can easily cause friction between the corrugated tube and the inner wall of the injection cavity, leading to damage to the corrugated tube.

[0028] Based on the above research, this disclosure provides an injection mold for corrugated pipe production. By setting a separable middle mold and a mold opening drive frame, the middle mold is separated by the mold opening drive frame to expose the corrugated pipe fitted on the core mold, thus solving the above problems.

[0029] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] See Figure 1 This disclosure provides an injection mold for corrugated pipe production, comprising: a lower mold 200, the upper surface of which is provided with at least one core mold 210, the outer contour of which matches the shape of the inner wall of the corrugated pipe. A middle mold 100 is provided above the lower mold 200, which includes a pair of symmetrically arranged parting molds 110. The opposite surfaces of the parting molds 110 are provided with grooves 111, and when the two parting molds 110 are closed, the grooves 111 surround the core mold 210 to form the injection cavity of the corrugated pipe.

[0033] See also Figure 1 The outer wall of the mold parting 110 is symmetrically equipped with V-shaped sliders 112, and the bottom surface is provided with a T-shaped guide rail 113. The injection mold also includes a mold opening drive frame 300, whose inner wall has a groove 310 that slides and engages with the sliders 112. Furthermore, the upper surface of the lower mold 200 has a guide groove 220 that slides and engages with the guide rail 113. Figure 1 As indicated by arrow F2, when the mold opening drive frame 300 is vertically raised, the slide groove 310 presses against the slider 112, producing a force similar to... Figure 1The lateral force shown in F1 drives the two molds 110 to move backward along the guide groove 220 to expose the bellows sleeved on the core mold 210. When the operator picks up the bellows, it will not cause friction between the bellows and the inner wall of the injection cavity, thus avoiding damage to the bellows when the injection mold is demolded.

[0034] See also Figure 1 In some embodiments, the extension directions of the guide rail 113 and the guide groove 220 are perpendicular to the axis in the middle of the parting mold 110. By arranging the guide rail 113 perpendicular to the axis, the lateral force F1 is transmitted completely along the extension direction of the guide rail 113, and the force flow path has no bifurcation loss.

[0035] See also Figure 1 In some embodiments, the outer wall of the mold opening drive frame 300 is symmetrically provided with support members 320 for easy gripping by the robot arm, so that the vertical lifting force on both sides of the mold opening drive frame 300 is relatively uniform, thereby improving the stability of the two molds 110 when they are translated backward along the guide groove 220.

[0036] See Figure 2 and Figure 3 In some embodiments, the core mold 210 is circumferentially arranged with a plurality of nitrogen injection ports 211, and the lower mold 200 is provided with a nitrogen delivery pipe 230 communicating with the nitrogen injection ports 211. Preferably, the nitrogen injection ports 211 are inclinedly arranged on the upper surface of the core mold 210 so that the injected gas flow enters the trough region of the bellows. The inclined injection allows the gas flow to preferentially enter the trough region of the bellows (i.e., the recessed part of the bellows), which can effectively overcome the local vacuum adsorption effect between the trough of the bellows and the core mold 210, thereby reducing the resistance during demolding. Demolding can be completed without applying a large ejection force, thus avoiding damage to the bellows during demolding.

[0037] See Figure 1 Some embodiments also provide an injection mold, including: a lower mold 200, the upper surface of which is provided with at least one core mold 210; a middle mold 100, including a pair of symmetrically arranged parting molds 110, the opposite surfaces of the parting molds 110 are provided with grooves 111, and when the two parting molds 110 are closed, the grooves 111 surround the core mold 210 to form an injection cavity; a mold opening drive frame 300, which is provided with a transmission mechanism linked to the parting molds 110; wherein, the bottom surface of the parting molds 110 is provided with a guide rail 113 with a cross-section of T, and the upper surface of the lower mold 200 is provided with a guide groove 220 that slides with the guide rail 113; when demolding, the transmission mechanism is adapted to provide a lateral driving force to the parting molds 110 to drive the two parting molds 110 to translate backward along the guide groove 220.

[0038] See also Figure 1In some embodiments, the transmission mechanism includes a figure-eight shaped groove 310 symmetrically arranged on the inner sidewall of the mold opening drive frame 300, and a slider 112 symmetrically arranged on the outer sidewall of the mold parting 110 that matches the shape of the groove 310; wherein, when the mold opening drive frame 300 is vertically raised, the groove 310 squeezes the slider 112 to generate a lateral force, thereby driving the two mold parts 110 to translate backward along the guide groove 220.

[0039] In summary, the injection mold for corrugated pipe production is designed with a separable middle mold 100. A pair of parting molds 110 of the middle mold 100 and the core mold 210 on the lower mold 200 form an injection cavity. When the mold opening drive frame 300 is vertically lifted, the slide groove 310 on the mold opening drive frame 300 presses the sliders 112 on both sides of the middle mold 100 to generate a lateral force, thereby driving the two parting molds 110 to move backward along the guide groove 220, exposing the corrugated pipe fitted on the core mold 210. When the corrugated pipe is removed, it will not cause friction with the inner wall of the injection cavity, thus avoiding damage to the corrugated pipe during demolding.

[0040] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0042] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0043] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An injection mold for producing corrugated pipes, characterized in that, include: The lower mold (200) has at least one core mold (210) on its upper surface. The intermediate mold (100) includes a pair of symmetrically arranged parting molds (110), the opposite surfaces of the parting molds (110) are provided with grooves (111), and when the two parting molds (110) are closed, the grooves (111) surround the core mold (210) to form an injection cavity; and the outer side wall of the parting mold (110) is symmetrically provided with figure-eight shaped sliders (112), and the bottom surface is provided with a guide rail (113) with a T-shaped cross section. The mold opening drive frame (300) has a groove (310) on its inner side wall that slides and engages with the slider (112). The upper surface of the lower mold (200) is provided with a guide groove (220) that slides with the guide rail (113); when the mold opening drive frame (300) is vertically raised, the slide groove (310) squeezes the slider (112) to generate a lateral force, so as to drive the two molds (110) to move backward along the guide groove (220).

2. The injection mold as described in claim 1, characterized in that, The extension direction of the guide rail (113) and the guide groove (220) is perpendicular to the axis (114) in the middle of the mold (110).

3. The injection mold as described in claim 1, characterized in that, The outer wall of the mold opening drive frame (300) is symmetrically provided with support members (320) to facilitate the gripping of the robot arm.

4. The injection mold as described in claim 1, characterized in that, The core mold (210) has a plurality of nitrogen injection ports (211) arranged circumferentially, and the lower mold (200) has a nitrogen delivery pipe (230) connected to the nitrogen injection ports (211).

5. The injection mold as described in claim 1, characterized in that, The nitrogen injection port (211) is inclinedly disposed on the upper surface of the core mold (210) so that the injected gas flow enters the trough region of the bellows.

6. An injection mold, characterized in that, include: The lower mold (200) has at least one core mold (210) on its upper surface. The middle mold (100) includes a pair of symmetrically arranged parting molds (110), and the opposite surfaces of the parting molds (110) are provided with grooves (111). When the two parting molds (110) are closed, the grooves (111) surround the core mold (210) to form an injection cavity. The mold opening drive frame (300) is equipped with a transmission mechanism that is linked to the mold parting (110); The bottom surface of the mold (110) is provided with a guide rail (113) with a T-shaped cross-section, and the upper surface of the lower mold (200) is provided with a guide groove (220) that slides with the guide rail (113). When demolding, the transmission mechanism is adapted to provide a lateral driving force to the mold (110) to drive the two molds (110) to translate backward along the guide groove (220).

7. The injection mold as described in claim 6, characterized in that, The transmission mechanism includes a figure-eight shaped slide groove (310) symmetrically arranged on the inner side wall of the mold opening drive frame (300), and a slider (112) matching the shape of the slide groove (310) symmetrically arranged on the outer side wall of the mold parting (110). When the mold opening drive frame (300) is vertically raised, the slide groove (310) squeezes the slider (112) to generate a lateral force, thereby driving the two molds (110) to move backward along the guide groove (220).

8. The injection mold as described in claim 6, characterized in that, The extension direction of the guide rail (113) and the guide groove (220) is perpendicular to the axis (114) in the middle of the mold (110).

9. The injection mold as described in claim 6, characterized in that, The outer wall of the mold opening drive frame (300) is symmetrically provided with support members (320) to facilitate the gripping of the robot arm.

10. The injection mold as described in claim 6, characterized in that, The core mold is provided with a nitrogen injection port (211), and the lower mold (200) is provided with a nitrogen delivery pipe (230) that communicates with the nitrogen injection port (211).

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