Injection mold with improved pouring gate

Abstract

The utility model discloses a sprue improved injection mold which comprises a mold body, the mold body comprises sprue inserts, an upper mold, a lower mold and a bearing table, the upper mold and the lower mold are detachably connected, the lower mold is integrally formed on the bearing table, the number of the sprue inserts is two, and the sprue inserts are located on the two sides of the top of the bearing table respectively. And the upper surfaces of the two sprue inserts are flush with the upper surface of the bearing table. According to the battery cell tray formed after injection molding of the mold body, generated stub bars are located on the lower surface of the tray, due to the submarine gate design, the smoothness of the working face of the tray cannot be affected after cutting, the roots of the stub bars are flat and easy to remove, the production time is shortened, material flowers, marks and the like which affect products do not exist, and the production efficiency is improved. And meanwhile, the surface of the tray is smoother, so that the battery cell can be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with an improved gate. Background Art

[0002] Injection molding technology is one of the widely used industrial production technologies at present. Injection molding is applicable to almost all thermoplastic plastics. With the booming development of the new energy battery industry, the production process of batteries is automated, and the battery cell trays are recycled on the battery cell production line, which puts high requirements on the product surface. The design of the gate is extremely important for the molding of the tray and the product quality.

[0003] The existing battery cell trays usually adopt side gating or front gating, which will result in excess runners. Manual removal of the runners is required, wasting production costs and time, or leaving marks on the product surface, affecting the surface quality and reducing the product qualification rate. Therefore, in view of the above problems, this application redesigned the product gating method, and proposed an injection mold with an improved gate in which the runner is easy to remove and the gate is arranged at the bottom of the product, which can eliminate the gate marks on the tray surface and improve the aesthetics of the product. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold with an improved gate to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An injection mold with an improved gate includes a mold body, the mold body includes gate inserts, an upper mold, a lower mold and a carrier table. The upper mold and the lower mold are detachably connected, and the lower mold is integrally formed on the carrier table. Two gate inserts are provided, which are respectively located on both sides of the top of the carrier table, and the upper surfaces of the two gate inserts are flush with the upper surface of the carrier table.

[0007] An arc-shaped groove is provided in the middle of the side of the gate insert close to the upper mold. Both ends of the gate insert body corresponding to one side of the arc-shaped groove are horizontal ends. A gate is opened at the middle position of the top of the gate insert, and the gate horizontally extends to the edge of the top of the gate insert on the side close to the upper mold. A runner groove is opened at the middle position of the inner wall of the gate insert located in the arc-shaped groove. Return grooves are opened at both ends of the gate insert body corresponding to one side of the runner groove, and both return grooves are communicated with the runner groove.

[0008] As a further solution of the present utility model: after the upper mold and the lower mold are connected, they form an integral body and are located between the two gate inserts. The two sides of the upper mold are respectively attached to the corresponding gate insert on one side. After the upper mold and the lower mold are connected, a cavity is formed between the upper and lower molds. The cavity is used for injection molding corresponding workpieces, and the two gate inserts are both used for injecting the raw materials required for workpiece molding into the cavity.

[0009] As a further solution of the present utility model: the runner groove and the gate are arranged in a cross shape, and a diversion groove is arranged between them. The diversion groove is opened on the inner wall of the gate insert located on one side of the arc-shaped groove. The diversion groove is used to connect the gate and the runner groove.

[0010] As a further solution of the present utility model: both of the two return grooves incline towards the upper mold side and extend upwards into the cavity formed after the upper mold and the lower mold are connected.

[0011] As a further solution of the present utility model: on the inner wall of the carrier table corresponding to one side of the two gate inserts, insert grooves are respectively opened. On the inner wall of the two insert grooves corresponding to one side of the arc-shaped groove, arc-shaped protrusions are respectively arranged. The shape of the arc-shaped protrusion is adapted to the shape of the arc-shaped groove. The gate insert is embedded in the insert groove, and the arc-shaped groove of the gate insert is attached to the arc-shaped protrusion.

[0012] As a further solution of the present utility model: the arc-shaped groove and the arc-shaped protrusion cooperate to separate the gate from the upper mold, so that a distance is left between the gate and the upper and lower molds.

[0013] As a further solution of the present utility model: after the mold body is injection molded, a battery cell tray body is formed. On the bottom of the battery cell tray body corresponding to one side of the two gate inserts, a sprue is integrally formed.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, raw material channels are provided in both of the two gate inserts. During the pouring process, the raw materials will also fill the raw material channels in the gate inserts. When the cell tray body is formed, the raw materials in the gate insert channels on both sides are also shaped to form sprue heads. The two sprue heads are integrally formed with the cell tray body. After the cell tray body is taken out from the mold, it is necessary to cut off the sprue heads at both ends of its bottom. Since the sprue heads are located on the lower surface of the cell tray body, this submarine gate design will not affect the smoothness of the working surface (i.e., the upper surface) of the tray after cutting. And through the combined use of the gate inserts and the reflux grooves, etc., the connection part between the formed sprue head and the tray (i.e., the root of the sprue head) presents a flat state. The sprue heads of this shape are relatively regular and easy to remove, reducing the production time, and there are no material flowers, traces, etc. affecting the product, greatly reducing the defective rate of the product, making the surface quality of the tray better, and the tray surface is flatter, which is beneficial to protecting the cell;

[0016] 2. In the present utility model, the outer shape of the arc-shaped protrusion is adapted to the shape of the arc-shaped groove. The gate insert is embedded in the insert groove, and the arc-shaped groove of the gate insert fits on the arc-shaped protrusion. Through the combined use of the arc-shaped groove and the arc-shaped protrusion, the gate is separated from the upper mold, leaving a distance between the gate and the upper and lower molds, avoiding the injection molding raw materials in the gate from sticking to the upper and lower molds after injection molding, and facilitating the removal of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural schematic diagram of the present utility model.

[0019] Figure 2 It is a structural schematic diagram of the upper mold of the present utility model.

[0020] Figure 3 It is a structural schematic diagram of the gate insert of the present utility model.

[0021] Figure 4 It is a structural schematic diagram of the cell tray of the present utility model.

[0022] Figure 5 It is a structural schematic diagram of the insert groove of the present utility model.

[0023] Annotation of reference numerals: 1 - Mold body, 11 - Gate insert, 111 - Gate, 112 - Arc-shaped groove, 113 - Runner groove, 114 - Return groove, 115 - Diversion groove, 12 - Upper mold, 13 - Insert groove, 131 - Arc-shaped protrusion, 14 - Carrying platform, 2 - Cell tray body, 21 - Sprue. Detailed implementation mode

[0024] The following embodiments will describe the present utility model in detail in conjunction with the accompanying drawings. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shapes, thicknesses, or heights of each component can be enlarged or reduced. The various embodiments listed in the present utility model are only used to illustrate the present utility model and are not used to limit the scope of the present utility model. Any obvious modification or change made to the present utility model does not depart from the spirit and scope of the present utility model.

[0025] Embodiment 1

[0026] Please refer to Figure 1 、 Figure 2 In the embodiment of the present utility model, an injection mold with an improved gate includes a mold body 1. The mold body 1 includes a gate insert 11, an upper mold 12, a lower mold (not shown in the figure), and a carrying platform 14. The upper mold 12 and the lower mold are detachably connected, and the lower mold is integrally formed on the carrying platform 14. Two gate inserts 11 are provided, respectively located on both sides of the top of the carrying platform 14, and the upper surfaces of the two gate inserts 11 are flush with the upper surface of the carrying platform 14. After the upper mold 12 and the lower mold are connected, they form an integral body and are located between the two gate inserts 11, and both sides of the upper mold 12 are respectively attached to the corresponding side of the gate insert 11. After the upper mold 12 and the lower mold are connected, a cavity is formed between the upper and lower molds, and the cavity is used for injection molding corresponding workpieces. Both of the two gate inserts 11 are used to inject the raw materials required for workpiece molding into the cavity.

[0027] Please refer to Figure 3 The gate insert 11 is a block structure. An arc-shaped groove 112 is provided in the middle of the side of the gate insert 11 close to the upper mold 12. Both ends of the block body of the gate insert 11 corresponding to the arc-shaped groove 112 are horizontal ends. A gate 111 is opened at the middle position of the top of the gate insert 11, and the gate 111 extends horizontally towards the side close to the upper mold 12 to the edge of the top of the gate insert 11. A runner groove 113 is opened at the middle position of the inner wall of the gate insert 11 located in the arc-shaped groove 112;

[0028] The runner groove 113 is arranged in a cross shape with the gate 111, and a diversion groove 115 is arranged between the two. The diversion groove 115 is opened on the inner wall of the gate insert 11 on one side of the arc-shaped groove 112. The diversion groove 115 is used to connect the gate 111 and the runner groove 113. Both ends of the gate insert 11 corresponding to one side of the runner groove 113 are provided with return grooves 114. Both return grooves 114 are connected to the runner groove 113, and both return grooves 114 are inclined towards the upper mold 12 and extend upwards into the cavity formed after the upper mold 12 and the lower mold are connected;

[0029] In this embodiment, the injection molding raw material is poured from the gate 111. The raw material enters the runner groove 113 along the gate 111 and the diversion groove 115. The raw material overflows along the runner groove 113 towards both ends until it flows out from the top openings of the two return grooves 114 and enters the cavity between the upper and lower molds. By observing the overflow situation of the raw material in the gate 111, it is determined whether the raw material in the cavity between the upper and lower molds is filled completely. When the raw material in the gate 111 overflows, stop pouring the raw material. At this time, the cavity is filled with the raw material. Wait for the raw material to cool and solidify, then take out the upper mold 12, and then take out the formed workpiece from the lower mold.

[0030] Please refer to Figure 5 , on one side of the inner wall of the carrier table 14 corresponding to the two gate inserts 11, insert grooves 13 are respectively opened. On one side of the inner walls of the two insert grooves 13 corresponding to the arc-shaped groove 112, arc-shaped protrusions 131 are respectively arranged. The outer shape of the arc-shaped protrusion 131 is adapted to the shape of the arc-shaped groove 112. The gate insert 11 is embedded in the insert groove 13, and the arc-shaped groove 112 of the gate insert 11 is attached to the arc-shaped protrusion 131. By using the cooperation of the arc-shaped groove 112 and the arc-shaped protrusion 131, the gate 111 is separated from the upper mold 12, leaving a distance between the gate 111 and the upper and lower molds, avoiding the injection molding raw material in the gate 111 from sticking to the upper and lower molds after injection molding.

[0031] Embodiment 2

[0032] Please refer to Figure 4 , on the basis of Embodiment 1, an injection mold with an improved gate further includes a battery cell tray body 2. The battery cell tray body 2 is formed by injection molding into the mold body 1. On one side of the bottom of the battery cell tray body 2 corresponding to the two gate inserts 11, a sprue 21 is integrally formed;

[0033] In this embodiment, raw materials are poured from the gate 111. After being shaped by the upper and lower molds, the cell tray body 2 is formed. And because two gate inserts 11 are provided, raw material channels are formed in both of the two gate inserts 11. The raw materials will also fill the raw material channels in the gate inserts 11 during the pouring process. When the cell tray body 2 is formed, the raw materials in the channels of the gate inserts 11 on both sides are also shaped to form the sprue heads 21. The two sprue heads 21 are integrally formed with the cell tray body 2. After the cell tray body 2 is taken out of the mold, the sprue heads 21 at both ends of its bottom need to be cut off. Since the sprue heads 21 are located on the lower surface of the cell tray body 2, this submarine gate design will not affect the smoothness of the working surface (i.e., the upper surface) of the tray after cutting. And through the combined use of the provided gate inserts 11 and the reflux grooves 114, the connection part of the formed sprue head 21 and the tray (i.e., the root of the sprue head 21) presents a flat state. The sprue heads of this shape are relatively regular and easy to remove, reducing the production time, and there are no material flowers, traces, etc. that affect the product, and the defective rate of the product is greatly reduced.

[0034] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

[0035] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An injection mold with an improved gate, comprising a mold body (1), characterized in that, The mold body (1) includes a gate insert (11), an upper mold (12), a lower mold, and a carrier table (14). The upper mold (12) and the lower mold are detachably connected, and the lower mold is integrally formed on the carrier table (14). Two gate inserts (11) are provided, respectively located on both sides of the top of the carrier table (14), and the upper surfaces of the two gate inserts (11) are flush with the upper surface of the carrier table (14). An arc-shaped groove (112) is provided in the middle of the side of the gate insert (11) close to the upper mold (12). Both ends of the gate insert (11) corresponding to the side of the arc-shaped groove (112) are horizontal ends. A gate (111) is opened at the middle position of the top of the gate insert (11). The gate (111) horizontally extends towards the side close to the upper mold (12) to the edge of the top of the gate insert (11). A runner groove (113) is opened at the middle position of the inner wall of the gate insert (11) located in the arc-shaped groove (112). Both ends of the gate insert (11) corresponding to the side of the runner groove (113) are provided with return grooves (114). The two return grooves (114) are both communicated with the runner groove (113).

2. The improved injection mold with gate according to claim 1, characterized in that, After the upper mold (12) and the lower mold are connected, they form an integral body and are located between the two gate inserts (11). The two sides of the upper mold (12) are respectively attached to the corresponding gate insert (11) on one side. After the upper mold (12) and the lower mold are connected, a cavity is formed between the upper and lower molds. The cavity is used for injection molding corresponding workpieces. The two gate inserts (11) are both used to inject the raw materials required for workpiece forming into the cavity.

3. The gate-improved injection mold according to claim 2, characterized in that, The runner groove (113) and the gate (111) are arranged in a cross shape, and a diversion groove (115) is provided between them. The diversion groove (115) is opened on the inner wall of the gate insert (11) located on one side of the arc-shaped groove (112). The diversion groove (115) is used to connect the gate (111) and the runner groove (113).

4. The improved injection mold with gate according to claim 3, characterized in that, Both of the two return grooves (114) incline towards the side of the upper mold (12) and extend upwards into the cavity formed after the upper mold (12) and the lower mold are connected.

5. The improved injection mold with gate according to claim 4, characterized in that, On one side of the inner wall of the carrier table (14) corresponding to the two gate inserts (11), insert grooves (13) are opened. On one side of the inner walls of the two insert grooves (13) corresponding to the arc-shaped groove (112), arc-shaped protrusions (131) are provided. The shape of the arc-shaped protrusion (131) is adapted to the shape of the arc-shaped groove (112). The gate insert (11) is embedded in the insert groove (13), and the arc-shaped groove (112) of the gate insert (11) is attached to the arc-shaped protrusion (131).

6. The gate-improved injection mold according to claim 5, wherein The arc-shaped groove (112) and the arc-shaped protrusion (131) cooperate to separate the gate (111) from the upper mold (12), so that a distance is left between the gate (111) and the upper and lower molds.

7. The improved injection mold with gate according to claim 1 or 6, characterized in that After injection molding of the mold body (1), a battery cell tray body (2) is formed. On one side of the bottom of the battery cell tray body (2) corresponding to the two gate inserts (11), a sprue (21) is integrally formed.

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