Plastic spoon injection mold

Abstract

The utility model relates to a plastic spoon injection mold, which comprises an upper mold core and a lower mold core, the end face of the upper mold core facing the lower mold core is provided with an arc-shaped curved surface which is recessed towards an upper mold core body and is in axis symmetry, the end face of the upper mold core on two sides of the arc-shaped curved surface is provided with a section of plane, and the arc-shaped curved surface takes the axis of the arc-shaped curved surface as a symmetry axis. Two rows of upper forming modules are symmetrically arranged, the end face, facing the upper mold core, of the lower mold core is provided with a protruding curved surface corresponding to the arc-shaped curved surface of the upper mold core, the end faces, on the two sides of the protruding curved surface, of the lower mold core are provided with corresponding planes, and two rows of lower forming modules corresponding to the upper forming modules are arranged on the protruding curved surface with the axis of the protruding curved surface as the symmetry axis; a glue inlet groove is formed between the two rows of lower forming modules, a plurality of needle holes are formed in the bottom of the glue inlet groove, an ejector pin of the injection mold upwards and slidably penetrates into the needle holes to eject a plastic spoon out of a mold core, a glue inlet hole is formed in the midpoint of the axis of the arc-shaped curved surface, and the plastic spoon injection mold for taking and placing cosmetics is designed.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, and particularly relates to an injection mold for plastic spoons. Background Art

[0002] An injection mold is a tool used to make plastic molded products, and different shaped products can be made through different shapes of the injection mold.

[0003] For example, in a Chinese patent with the patent number 202322934738.2, an injection mold capable of simultaneously molding multiple disposable spoons includes an upper moving mold and a lower fixed mold. On the end face of the upper moving mold facing downwards, a plurality of upper molding modules are arranged side by side. The upper molding module includes an arc groove and a handle protrusion. On the lower fixed mold, a plurality of lower molding modules are arranged side by side. The lower molding module includes an arc protrusion and a handle groove. A glue inlet groove is arranged between two rows of lower molding modules. The glue inlet groove communicates with the handle groove. A plurality of pinholes are arranged at the bottom of the glue inlet groove. A plurality of ejector pins are arranged on the ejector pin plate. The ejector pins can slide upwards and penetrate into the pinholes. When the mold is closed, the upper molding module and the lower molding module form a cavity for molding disposable spoons. When demolding, the upper moving mold and the lower fixed mold are separated. The hot melt glue in the glue inlet groove cools and solidifies into a strip. The disposable spoons are connected to both sides of the strip. The ejector pins push the strip upwards to drive the disposable spoons to fall off from the lower molding module, realizing batch molding and demolding of disposable spoons.

[0004] Based on the prior art, those skilled in the art designed an injection mold for plastic spoons used for taking and placing cosmetics according to the needs of the customer usage scenario. Summary of the Utility Model

[0005] Aiming at the deficiencies existing in the prior art, the purpose of the present utility model is to provide an injection mold for plastic spoons to solve the problems in the above background art.

[0006] The present utility model provides an injection mold for plastic spoons, which includes an upper mold core and a lower mold core. On the end face of the upper mold core facing the lower mold core, there is an arc-shaped curved surface that is concave towards the upper mold core body and is axisymmetric. On the end faces of the upper mold core on both sides of the arc-shaped curved surface, there is a section of flat surface. On the arc-shaped curved surface, two rows of upper molding modules are symmetrically arranged with the axis of the arc-shaped curved surface as the symmetry axis. On the end face of the lower mold core facing the upper mold core, a convex curved surface corresponding to the arc-shaped curved surface of the upper mold core is arranged. On the end faces of the lower mold core on both sides of the convex curved surface, corresponding flat surfaces are arranged. On the convex curved surface, two rows of lower molding modules corresponding to the upper molding modules are arranged with the axis of the convex curved surface as the symmetry axis. A glue inlet groove is arranged between two rows of lower molding modules. A plurality of pinholes are arranged at the bottom of the glue inlet groove. The ejector pins of the injection mold can slide upwards and penetrate into the pinholes to eject the plastic spoon out of the mold core. An inlet hole is arranged at the midpoint of the axis of the arc-shaped curved surface.

[0007] Further, there are two rows of upper forming modules, with four symmetrically arranged at equal intervals in each row, totaling eight, and the corresponding lower forming modules are set to eight.

[0008] Further, the upper forming module includes a gourd-shaped groove. The gourd-shaped groove is arranged on the arc-shaped surface in the part from one-half to three-quarters of the overall height in the orthographic projection as the spoon handle groove of the plastic spoon, and the part from one-half to one-quarter is arranged on the plane of the end face of the upper mold core as the spoon body groove of the plastic spoon. On the side of the spoon body groove far from the spoon handle groove, a section of arc-shaped depression is symmetrically recessed towards the upper mold core body direction on both sides with the length axis of the gourd-shaped groove as the midpoint as the edge groove of the spoon body groove;

[0009] The lower forming module includes a gourd-shaped groove. The gourd-shaped groove is arranged on the convex surface in the part from one-half to three-quarters of the overall height in the orthographic projection as the lower spoon handle groove of the plastic spoon, and the part from one-half to one-quarter is arranged on the plane of the end face of the lower mold core as the lower spoon body groove of the plastic spoon.

[0010] Furthermore, a circular arc-shaped handle convex part is provided at the midpoint of the axis of the lower spoon handle groove of the lower forming module.

[0011] Furthermore, a circular arc-shaped body convex part is provided at the position where the axis of the lower spoon body groove of the lower forming module is close to the lower spoon handle groove.

[0012] Further, the glue inlet groove includes an axis glue groove located on the axis of the convex surface and symmetrically arranged with the glue inlet hole as the center point, a transverse glue groove connected to the end of the axis glue groove and perpendicular to the axis glue groove, and a lower mold core glue groove with one end perpendicularly connected to the end of the transverse glue groove and the other end connected to the middle part of the side of the lower forming module.

[0013] Preferably, the length of the axis glue groove extends from the glue inlet hole to the center points of two lower forming modules on one side of the glue inlet hole as the length standard.

[0014] Preferably, the length of the transverse glue groove starts from one end of the axis glue groove and extends to the midline between two lower forming modules on one side of the axis glue groove as the end point.

[0015] Further, the axis connection part of the arc-shaped surface and the convex surface is designed as a planar shape.

[0016] Further, the end face of the upper mold core facing the lower mold core is provided with guide posts, the end face of the lower mold core facing the upper mold core is provided with guide holes, positioning blocks are provided at the four corners of the end face of the upper mold core facing the lower mold core, positioning grooves are provided at the four corners of the end face of the lower mold core facing the upper mold core, and exhaust holes are provided at one end of the upper forming module far from the axis of the arc-shaped surface.

[0017] The utility model has the following beneficial effects: On the basis of the prior art, an injection mold for a plastic spoon used for placing and taking cosmetics is designed to meet the needs of the customer's usage scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall schematic diagram of the utility model;

[0019] Figure 2 is the three-dimensional view of the lower mold core of the utility model;

[0020] Figure 3 is the top view of the lower mold core of the utility model.

[0021] Figure 4 is the three-dimensional view of the upper mold core of the utility model;

[0022] Figure 5 is the cross-sectional view of the utility model;

[0023] Figure 6 is the injection molding diagram of the plastic spoon of the utility model;

[0024] Figure 7 is the detail diagram of the plastic spoon of the utility model.

[0025] In the figure: 1. upper mold core; 101. arc-shaped curved surface; 102. upper molding module; 1021. spoon handle groove; 1022. spoon body groove; 1023. edge groove; 2. lower mold core; 201. convex curved surface; 202. lower molding module; 2021. lower spoon handle groove; 2022. lower spoon body groove; 2023. handle convex part; 2024. body convex part; 3. glue inlet groove; 301. axial glue groove; 302. transverse glue groove; 303. lower mold core glue groove; 4. pinhole; 5. plastic spoon; 6. glue inlet hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the objectives, features, and advantages of the utility model more obvious and understandable, the following provides a detailed description of the specific embodiments of the utility model with reference to the accompanying drawings. Several embodiments of the utility model are given in the drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0027] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. Terms such as "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for the purpose of illustration, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0029] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0030] Embodiment 1

[0031] As Figures 1 to 7As shown in the figure, an injection mold for a plastic spoon includes an upper mold core 1 and a lower mold core 2. The end face of the upper mold core 1 facing the lower mold core 2 is provided with an arc-shaped curved surface 101 that is recessed towards the body of the upper mold core 1 and is axisymmetric. On both sides of the arc-shaped curved surface 101 on the end face of the upper mold core 1, there is a section of flat surface. On the arc-shaped curved surface 101, two rows of upper forming modules 102 are symmetrically arranged with the axis of the arc-shaped curved surface 101 as the symmetry axis. Four are arranged symmetrically at equal intervals in each row. The end face of the lower mold core 2 facing the upper mold core 1 is provided with a convex curved surface 201 corresponding to the arc-shaped curved surface 101 of the upper mold core 1. On both sides of the convex curved surface 201 on the end face of the lower mold core 2, there are corresponding flat surfaces. On the convex curved surface 201, two rows of a total of eight lower forming modules 202 are arranged corresponding to the upper forming modules 102 with the axis of the convex curved surface 201 as the symmetry axis. A glue inlet groove 3 is arranged between the two rows of lower forming modules 202. Several pinholes 4 are arranged at the bottom of the glue inlet groove 3. The ejector pin of the injection mold can slide upward through the pinholes 4 to eject the plastic spoon 5 out of the mold core. A glue inlet hole 6 is arranged at the midpoint of the axis of the arc-shaped curved surface 101.

[0032] An exhaust hole is arranged at one end of the upper forming module 102 away from the axis of the arc-shaped curved surface 101.

[0033] The end face of the upper mold core 1 facing the lower mold core 2 is provided with guide posts. At the four corners of the end face of the upper mold core 1 facing the lower mold core 2, there are positioning blocks. At the four corners of the end face of the lower mold core 2 facing the upper mold core 1, there are positioning grooves. The end face of the lower mold core 2 facing the upper mold core 1 is provided with guide holes.

[0034] The connecting part of the axes of the arc-shaped curved surface 101 and the convex curved surface 201 is designed as a flat shape.

[0035] The glue inlet hole 6 is designed as a flat surface, which is more conducive to ensuring the glue injection effect and preventing the glue from leaking at the contact surface between the arc-shaped curved surface 101 and the convex curved surface 201.

[0036] The upper forming module 102 includes a calabash-shaped groove. The calabash-shaped groove is arranged on the arc-shaped curved surface 101 with the part from one-half to three-fourths of the overall height in the front projection as the spoon handle groove 1021 of the plastic spoon 5, and the part from one-half to one-fourth is arranged on the flat surface of the end face of the upper mold core 1 as the spoon body groove 1022 of the plastic spoon 5. On one side of the spoon body groove 1022 away from the spoon handle groove 1021, a section of arc-shaped depression is symmetrically recessed towards the body of the upper mold core 1 with the length axis of the calabash-shaped groove as the midpoint on both sides as the edge groove 1023 of the spoon body groove 1022;

[0037] The lower forming module 202 includes a calabash-shaped groove that has the same shape and relative position as the calabash-shaped groove of the upper forming module 102. The calabash-shaped groove is arranged on the convex curved surface 201 with the part from one-half to three-fourths of the overall height in the front projection as the lower spoon handle groove 2021 of the plastic spoon 5, and the part from one-half to one-fourth is arranged on the flat surface of the end face of the lower mold core 2 as the lower spoon body groove 2022 of the plastic spoon 5.

[0038] At the midpoint of the axis of the lower spoon handle groove 2021 of the lower forming module 202, there is an arc-shaped handle protrusion 2023.

[0039] At a position where the axis of the lower spoon body groove 2022 of the lower forming module 202 is close to the lower spoon handle groove 2021, there is an arc-shaped body protrusion 2024.

[0040] The glue inlet groove 3 includes an axial glue groove 301 located on the axis of the convex curved surface 201 and symmetrically arranged with the glue inlet hole 6 as the center point, a transverse glue groove 302 connected to the end of the axial glue groove 301 and perpendicular to the axial glue groove 301, and a lower die core glue groove 303 with one end perpendicularly connected to the end of the transverse glue groove 302 and the other end connected to the middle part of the side of the lower forming module 202.

[0041] During injection molding, the upper die core 1 and the lower die core 2 are closed and clamped tightly. The hot melt adhesive enters the glue inlet groove 3 through the glue inlet hole 6 and flows along the length direction of the axial glue groove 301 towards the transverse glue groove 302. When the transverse glue groove 302 is filled, it continues to flow towards the lower die core glue groove 303 and flows into the cavities formed by eight upper forming modules 102 and the lower forming module 202 to form the plastic spoon 5 through the lower die core glue groove 303. After being filled and cooled, the plastic spoon 5 is formed;

[0042] During demolding, the hot melt adhesive in the glue inlet groove cools and solidifies into a strip. The plastic spoon 5 is connected to both sides of the strip. The ejector pin passes upward through the pin hole 4 to push the strip to drive the plastic spoon 5 to fall off from the lower forming module 202, realizing demolding.

[0043] Embodiment 2

[0044] As Figure 2 、 3 、6 shows, as an optimized scheme of the glue inlet groove 3 in Embodiment 1, the length of the axial glue groove 301 extends from the glue inlet hole 6 as the starting point to the perpendicular point of the center line of the two lower forming modules 202 on one side of the glue inlet hole 6 as the length standard.

[0045] The length of the transverse glue groove 302 extends from one end of the axial glue groove 301 as the starting point to the midline between the two lower forming modules 202 on one side of the axial glue groove 301 as the end point.

[0046] By accurately determining the lengths of the axial glue groove 301 and the transverse glue groove 302, the usage amount of the injection plastic can be saved, the production cost of the plastic spoon 5 can be reduced, and the economic benefit can be improved.

[0047] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. An injection mold for a plastic spoon, characterized in that, It includes an upper mold core and a lower mold core. The end face of the upper mold core facing the lower mold core is provided with an arc-shaped curved surface that is sunken towards the upper mold core body and is axisymmetric. There is a section of plane on the end face of the upper mold core on both sides of the arc-shaped curved surface. On the arc-shaped curved surface, two rows of upper forming modules are symmetrically arranged with the axis of the arc-shaped curved surface as the symmetry axis. The end face of the lower mold core facing the upper mold core is provided with a convex curved surface corresponding to the arc-shaped curved surface of the upper mold core. There are corresponding planes on the end face of the lower mold core on both sides of the convex curved surface. On the convex curved surface, two rows of lower forming modules are arranged corresponding to the upper forming modules with the axis of the convex curved surface as the symmetry axis. A glue inlet groove is arranged between the two rows of lower forming modules. Several pinholes are arranged at the bottom of the glue inlet groove. The ejector pin of the injection mold can slide upwards through the pinholes to eject the plastic spoon out of the mold core. A glue inlet hole is arranged at the midpoint of the axis of the arc-shaped curved surface.

2. The plastic spoon injection mold according to claim 1, characterized in that, There are two rows of upper forming modules, with four symmetrically arranged at equal distances in each row, a total of eight, and the corresponding lower forming modules are eight.

3. The plastic spoon injection mold according to claim 1, characterized in that, The upper forming module includes a gourd-shaped groove. The gourd-shaped groove is arranged on the arc-shaped curved surface with one-half to three-fourths of the overall height of the orthographic projection as the spoon handle groove of the plastic spoon, and one-half to one-fourth of the part is arranged on the plane of the end face of the upper mold core as the spoon body groove of the plastic spoon. On the side of the spoon body groove far from the spoon handle groove, a section of arc-shaped depression is symmetrically sunken towards the upper mold core body with the length axis of the gourd-shaped groove as the midpoint as the edge groove of the spoon body groove; The lower forming module includes a gourd-shaped groove. The gourd-shaped groove is arranged on the convex curved surface with one-half to three-fourths of the overall height of the orthographic projection as the lower spoon handle groove of the plastic spoon, and one-half to one-fourth of the part is arranged on the plane of the end face of the lower mold core as the lower spoon body groove of the plastic spoon.

4. The plastic spoon injection mold according to claim 3, characterized in that, A circular arc-shaped handle convex part is arranged at the midpoint of the axis of the lower spoon handle groove of the lower forming module.

5. The plastic spoon injection mold according to claim 3, characterized in that, A circular arc-shaped body convex part is arranged at the axis of the lower spoon body groove of the lower forming module near the lower spoon handle groove.

6. The plastic spoon injection mold according to claim 1, characterized in that, The glue inlet groove includes an axis glue groove located on the axis of the convex curved surface and symmetrically arranged with the glue inlet hole as the center point, a transverse glue groove connected to the end of the axis glue groove and perpendicular to the axis glue groove, and a lower mold core glue groove with one end perpendicularly connected to the end of the transverse glue groove and the other end connected to the middle part of the side of the lower forming module.

7. The plastic spoon injection mold according to claim 6, wherein, The length of the axis glue groove extends from the glue inlet hole to the center points of two lower forming modules on one side of the glue inlet hole as the length standard.

8. The plastic spoon injection mold according to claim 6, characterized in that, The length of the transverse glue groove starts from one end of the axis glue groove and extends to the midline between two lower forming modules on one side of the axis glue groove as the end point.

9. The plastic spoon injection mold according to any one of claims 1 to 8, characterized in that, The axis-connected part of the arc-shaped curved surface and the convex curved surface is designed as a planar shape.

10. The plastic spoon injection mold according to claim 1, characterized in that, The end face of the upper mold core facing the lower mold core is provided with guide posts, the end face of the lower mold core facing the upper mold core is provided with guide holes, positioning blocks are arranged at the four corners of the end face of the upper mold core facing the lower mold core, positioning grooves are arranged at the four corners of the end face of the lower mold core facing the upper mold core, and exhaust holes are arranged at one end of the upper forming module far from the axis of the arc-shaped curved surface.

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