Molding structure for forming L-shaped tray

Abstract

A first cavity is arranged on a fixed mold core, the bottom wall and the side wall of the first cavity are matched with the outer wall of a product, a convex hull and a second guide groove are arranged on a movable mold core, the convex hull is matched with the first cavity, the bottom wall and the side wall of the convex hull are matched with the inner wall of the product, the second guide groove is of a Z-shaped structure and is arranged on the side of the convex hull, a sliding block is arranged on a movable mold plate, and the sliding block is arranged on the movable mold plate. The end of the sliding block is matched with the outer wall of a product in shape. The first cavity and the convex hull which are matched with each other are arranged on the fixed mold core and the movable mold core, the Z-shaped second guide groove is formed in the side of the convex hull, the sliding block is arranged on the side of the movable mold core in a sliding mode, and the third positioning part and the third guide groove which are used for being matched with the side wall of the convex hull and the second guide groove are arranged at the end of the sliding block. When the mold is closed, a cavity matched with the L-shaped tray can be defined to synchronously form positioning structures on the side wall and the bottom plate of the L-shaped tray, and when the mold is opened, the end part of the sliding block can be smoothly withdrawn from the movable mold core to complete the side core-pulling action, and the side wall and the bottom plate of the tray cannot be damaged by pulling.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molds, in particular to a mold structure for forming an L-shaped tray. Background Art

[0002] Pallets are typically used to hold materials or semi-finished products and are widely used in automated production lines equipped with automatic loading and unloading stations. Although most automatic loading and unloading mechanisms automatically adjust product position, frequent position adjustments not only reduce loading and unloading speeds but also accelerate wear of the loading and unloading mechanism. Therefore, improving the pallet's positioning accuracy is necessary to enhance loading and unloading efficiency and extend the life of the loading and unloading mechanism.

[0003] Generally, a positioning structure is formed on at least one side wall of the pallet. In order to save costs, some pallets even have only a bottom plate and a positioning side wall, that is, an L-shaped pallet. Due to the structural asymmetry, the core may be difficult to remove or the positioning side wall may be damaged during the demolding process. Utility Model Content

[0004] In response to the problems existing in the above-mentioned prior art, the utility model provides a mold structure for forming an L-shaped pallet. When the mold is closed, it can enclose and form a cavity that is compatible with the L-shaped pallet to synchronously form the positioning structure on the side wall and bottom plate of the L-shaped pallet. When the mold is opened, the end of the slider can smoothly withdraw from the movable mold core to complete the side core pulling action without damaging the side wall and bottom plate of the pallet.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is as follows:

[0006] The mold structure for forming an L-shaped pallet comprises a fixed mold and a movable mold, the fixed mold is provided with a glue inlet flow channel, a fixed platen, and a fixed mold core, the movable mold is provided with a movable platen, a movable mold core, and a plurality of ejector pins / ejector plates, and the fixed mold core and movable mold core are respectively embedded in the facing ends of the fixed platen and movable platen; wherein:

[0007] A first cavity is formed at the end of the fixed mold core facing the movable mold core, and a first positioning portion adapted to the outer wall of the L-shaped tray is formed on the bottom wall and side walls of the first cavity; the first cavity is connected to the glue inlet flow channel;

[0008] The movable mold core is formed with a convex bulge and a second guide groove at the end thereof facing the fixed mold core. The convex bulge is adapted to the first cavity and a second positioning portion adapted to the inner wall of the L-shaped tray is formed on its bottom wall and side walls. The second guide groove is a Z-shaped structure and is provided beside the convex bulge.

[0009] A slider is slidably mounted on the movable plate beside the movable mold core, and a third positioning portion and an inverted L-shaped third guide groove are formed on the end of the slider facing the movable mold core. The third positioning portion is adapted to the outer wall of the L-shaped tray, and the third guide groove matches the second guide groove and can be abutted against its side wall; the slider can slide on the movable plate under the drive of external force so that the end thereof provided with the third positioning portion and the third guide groove is close to or away from the movable mold core.

[0010] As a further elaboration of the above technical solution:

[0011] In the above technical solution, a slideway is formed on the movable mold plate beside the movable mold core, and the sliding block is matched and installed on the slideway.

[0012] In the above technical solution, the slider is further provided with one or more diagonal braces, and several of the diagonal braces are arranged in parallel, one end of each of which obliquely passes through the slider and is slidably connected to it, and the other end of each of which extends to the outside of the movable mold and extends obliquely toward the center of the fixed mold; the movable mold plate is provided with several sliding grooves at the lower end of the slider for limiting the translational stroke of each diagonal brace, and the fixed mold plate is provided with several guide hole grooves that match each of the diagonal braces one by one.

[0013] In the above technical solution, a second cavity is formed on the two opposite side walls of the bulge on the movable mold core, each of the second cavities is adapted to one side wall of the L-shaped tray, and the two second cavities are symmetrically arranged on both sides of the second guide groove; a branch channel that can be connected to the glue feed channel is provided on the movable mold core, and the end of the branch channel is connected to the second cavity.

[0014] In the above technical solution, the movable mold core and the movable plate are both provided with a number of holes and grooves extending along the demolding direction, and the number of holes and grooves pass through the movable mold core and the movable plate and extend to the end face of the bulge and the second cavity respectively. Each of the ejector pins / ejector plates can slide along a hole and groove driven by an external force to push the L-shaped tray away from the movable mold core.

[0015] Compared with the prior art, the beneficial effects of the present invention are: by arranging matching first cavities and bulges on the fixed mold core and the movable mold core, arranging a Z-shaped second guide groove beside the bulge, and slidingly installing a slider beside the movable mold core, and arranging a third positioning portion and a third guide groove at the end of the slider for matching the side wall of the bulge and the second guide groove, when the mold is closed, a cavity matching the L-shaped pallet can be formed to synchronously form the positioning structure on the side wall and bottom plate of the L-shaped pallet, and when the mold is opened, the end of the slider can smoothly withdraw from the movable mold core to complete the side core pulling action without damaging the side wall and bottom plate of the pallet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an L-shaped tray in this embodiment;

[0017] Figure 2 Schematic diagram of the structure of the movable mold when the mold is closed in this embodiment;

[0018] Figure 3 Schematic diagram of the structure of the fixed mold core in this embodiment;

[0019] Figure 4 Schematic diagram of the structure of the movable mold core in this embodiment;

[0020] Figure 5 It is a schematic diagram of the exploded structure of the movable plate and the slider in this embodiment.

[0021] In the figure: 20, fixed mold core; 21, first cavity; 30, movable mold plate; 31, slide; 32, slide groove; 40, movable mold core; 41, convex bump; 42, second guide groove; 43, second cavity; 50, ejector pin / ejector plate; 60, slider; 61, third positioning part; 62, third guide groove; 70, diagonal brace; 100, L-shaped tray; 1, glue feed channel; 2, first positioning part; 3, second positioning part; 4, hole groove; 5, diverter channel. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] The embodiments described with reference to the accompanying drawings are illustrative and intended to explain the present application, and should not be construed as limiting the present application. In the description of this application, it should be understood that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" and "a plurality" mean two or more, unless otherwise specifically defined. In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0024] For ease of understanding, Figure 1 A schematic diagram of the L-shaped tray 100 in this embodiment shows its overall L-shape. The raised sidewall forms an inverted L-shaped structure. The sidewall near the base has concave and convex positioning structures. The base has a guide structure, and protective structures are formed on both sides. During production, the mold can easily break the sidewall or base during demolding.

[0025] In this embodiment, the mold is a one-mold two-cavity structure. Figures 2-4As shown, the mold structure of the shaped L-shaped tray, the mold is provided with a fixed mold and a movable mold, the fixed mold is provided with a glue inlet channel 1, a fixed mold plate and a fixed mold core 20, the movable mold is provided with a movable mold plate 30, a movable mold core 40 and a plurality of ejector pins / ejector plates 50, the fixed mold core 20 and the movable mold core 40 are respectively embedded on the opposite end portions of the fixed mold plate and the movable mold plate 30; wherein:

[0026] The end portion of the fixed mold core 20 towards the movable mold core 40 is formed with a first cavity 21, the bottom wall and the side wall of the first cavity 21 are formed with a first positioning portion 2 matched with the outer wall of the L-shaped tray 100; the first cavity 21 is communicated with the glue inlet channel 1;

[0027] The end portion of the movable mold core 40 towards the fixed mold core 20 is formed with a convex 41 and a second guide groove 42, the convex 41 is matched with the first cavity 21 and the bottom wall and the side wall thereof are formed with a second positioning portion 3 matched with the inner wall of the L-shaped tray 100, the second guide groove 42 is a Z-shaped structure and is arranged beside the convex 41;

[0028] The movable mold plate 30 is slidably provided with a sliding block 60 beside the movable mold core 40, the end portion of the sliding block 60 towards the movable mold core 40 is formed with a third positioning portion 61 and a third guide groove 62 in the shape of inverted L, the third positioning portion 61 is matched with the outer wall of the L-shaped tray 100, the third guide groove 62 is matched with the second guide groove 42 and can abut against the side wall thereof; the sliding block 60 can slide on the movable mold plate 30 under the drive of external force to make the end portion provided with the third positioning portion 61 and the third guide groove 62 approach or move away from the movable mold core 40, the movable mold plate 30 is formed with a sliding channel 31 beside the movable mold core 40, and the sliding block 60 is matched and arranged on the sliding channel 31.

[0029] The utility model discloses a matching first cavity 21 and convex 41 are arranged on the fixed mold core 20 and the movable mold core 40, the Z-shaped second guide groove 42 is arranged beside the convex 41, the sliding block 60 is slidably arranged beside the movable mold core 40, and the third positioning portion 61 and the third guide groove 62 matched with the side wall of the convex 41 and the second guide groove 42 are arranged on the end portion of the sliding block 60, when the mold is closed, the cavity matched with the L-shaped tray 100 can be formed to simultaneously form the positioning structure on the side wall and the bottom plate of the L-shaped tray 100, and when the mold is opened, the end portion of the sliding block 60 can be smoothly withdrawn from the movable mold core 40 to complete the side core-pulling action without damaging the side wall and the bottom plate of the tray.

[0030] In order to form the protection structure of the two opposite sides of the L-shaped tray 100 of the embodiment, the movable mold core 40 is further formed with a second cavity 43 on the two opposite side walls of the convex 41, each second cavity 43 is matched with a side wall of the L-shaped tray 100, and the two second cavities 43 are symmetrically arranged on the two sides of the second guide groove 42; the movable mold core 40 is provided with a branch channel 5 communicated with the glue inlet channel 1, and the end portion of the branch channel 5 is communicated with the second cavity 43.

[0031] In this embodiment, if Figure 5 As shown, the slider 60 is further provided with one or more diagonal struts 70, and several diagonal struts 70 are arranged in parallel, one end of each of which obliquely passes through the slider 60 and is slidably connected thereto, and the other end of each of which extends to the outside of the movable mold and extends obliquely toward the center of the fixed mold; the movable mold plate 30 is provided with several sliding grooves 32 at the lower end of the slider 60 for limiting the translational stroke of each diagonal strut 70, and the fixed mold plate is provided with several guide hole grooves that match each diagonal strut 70 one by one.

[0032] During the mold closing process, one end of the diagonal support 70 is limited and guided by the guide hole groove on the fixed mold plate, and the diagonal support 70 is pushed back to slide relative to the slider 60 and the movable mold plate 30, pushing the slider 60 toward the movable mold core 40; during the mold opening process, the movable mold plate 30 leaves the fixed mold, driving the diagonal support 70 to pull the slider 60 to slide relative to it, pulling the slider 60 away from the movable mold core 40, completing the side core pulling action.

[0033] In order to facilitate demoulding, Figures 4-5 As shown, a plurality of holes 4 extending along the demolding direction are provided on the movable mold core 40 and the movable plate 30. The plurality of holes 4 penetrate the movable mold core 40 and the movable plate 30 and extend to the end surface of the convex bulge 41 and the second cavity 43 respectively. Each ejector pin / ejector plate 50 can slide along a hole 4 driven by an external force to push the L-shaped tray 100 away from the movable mold core 40.

[0034] After the mold is opened in this embodiment, the L-shaped tray 100 is inverted onto the movable mold core. Based on the specific product structure, the shape and position of the holes 4 and the ejector pins / plates 50 on the movable platen 30 and movable mold core 40 are appropriately designed. During demolding, the ejector pins / plates 50 can push the L-shaped tray 100 away from the movable mold core 40. In this embodiment, draft angles are provided on the sidewalls of the first cavity 21 and the protrusion 41 to facilitate smoother demolding, minimize product compression during demolding, and prevent and reduce product deformation.

[0035] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mold structure for forming an L-shaped pallet, wherein the mold comprises a fixed mold and a movable mold; the fixed mold is provided with a glue inlet flow channel, a fixed platen, and a fixed mold core; the movable mold is provided with a movable platen, a movable mold core, and a plurality of ejector pins / ejector plates; the fixed mold core and movable mold core are respectively embedded in the facing ends of the fixed and movable mold plates; and characterized by: A first cavity is formed at the end of the fixed mold core facing the movable mold core, and a first positioning portion adapted to the outer wall of the L-shaped tray is formed on the bottom wall and side walls of the first cavity; the first cavity is connected to the glue inlet flow channel; The movable mold core is formed with a convex bulge and a second guide groove at the end thereof facing the fixed mold core. The convex bulge is adapted to the first cavity and a second positioning portion adapted to the inner wall of the L-shaped tray is formed on its bottom wall and side walls. The second guide groove is a Z-shaped structure and is provided beside the convex bulge. A slider is slidably mounted on the movable plate beside the movable mold core, and a third positioning portion and an inverted L-shaped third guide groove are formed on the end of the slider facing the movable mold core. The third positioning portion is adapted to the outer wall of the L-shaped tray, and the third guide groove matches the second guide groove and can be abutted against its side wall; the slider can slide on the movable plate under the drive of external force so that the end thereof provided with the third positioning portion and the third guide groove is close to or away from the movable mold core.

2. The mold structure for forming an L-shaped pallet according to claim 1, characterized in that: A slideway is formed on the movable die plate beside the movable die core, and the sliding block is matched and mounted on the slideway.

3. The mold structure for forming an L-shaped pallet according to claim 1, characterized in that: The slider is also provided with one or more diagonal braces, and several of the diagonal braces are arranged in parallel, one end of each of which obliquely passes through the slider and is slidably connected to it, and the other end of each of which extends to the outside of the movable mold and extends obliquely toward the center of the fixed mold; the movable mold plate is provided with several sliding grooves at the lower end of the slider for limiting the translational stroke of each diagonal brace, and the fixed mold plate is provided with several guide hole grooves that match each of the diagonal braces one by one.

4. The mold structure for forming an L-shaped pallet according to any one of claims 1 to 3, characterized in that: A second cavity is formed on the movable mold core on two opposite side walls of the bulge, each of the second cavities is adapted to one side wall of the L-shaped tray, and the two second cavities are symmetrically arranged on both sides of the second guide groove; a branch channel that can be connected to the glue feed channel is provided on the movable mold core, and the end of the branch channel is connected to the second cavity.

5. The mold structure for forming an L-shaped pallet according to claim 4, characterized in that: The movable mold core and the movable plate are both provided with a plurality of holes and grooves extending along the demolding direction. The plurality of holes and grooves pass through the movable mold core and the movable plate and extend to the end surface of the bulge and the second cavity respectively. Each ejector pin / ejector plate can slide along a hole and groove under the drive of external force to push the L-shaped tray away from the movable mold core.

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