Plastic daily necessity rubber coating injection mold

Abstract

The utility model belongs to the technical field of molds, and relates to a rubber coating injection mold for plastic daily necessities. The plastic daily necessity forming die comprises a plastic daily necessity forming lower die and a plastic daily necessity forming upper die. In the injection molding process, the plastic daily necessity molding lower mold and the plastic daily necessity molding upper mold are close to each other, so that the main body molding lower cavity and the main body molding upper cavity are arranged right opposite to each other, and the groove strip molding lower part and the groove strip molding upper part are arranged right opposite to each other to form two complete mold cavities; the groove and concave strip structures on the front face and the back face of a plastic part can be synchronously formed through cooperation of the groove strip forming lower portion and the groove strip forming upper portion, follow-up pressing machining is not needed, an integrated double-outlet forming structure is adopted, on one hand, the forming efficiency is greatly improved, and on the other hand, the forming cost is reduced; on the other hand, the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an overmolding injection mold for plastic daily necessities. Background Art

[0002] An injection mold is a tool used to produce plastic products and give them a complete structure and precise dimensions. Injection molding is a processing method used for mass production of certain complex-shaped parts. Specifically, heated, molten plastic is injected into a mold cavity under high pressure by an injection molding machine. After cooling and solidification, the resulting molded product is obtained. The injection mold consists of two parts: a movable mold and a fixed mold. The movable mold is mounted on the movable platen of the injection molding machine, and the fixed mold is mounted on the fixed platen of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form the pouring system and the mold cavity. When the mold is opened, the movable mold and the fixed mold are separated to facilitate the removal of the plastic product. Currently, for plate-shaped plastic daily necessities, the injection molding process is generally performed first using an injection mold, and then the grooves and concave strips required for the plastic part are pressed using a pressing mold. This requires the use of two molds for production, resulting in a complex process, easy damage to the plastic part, low production efficiency, and high production costs. Therefore, it is urgently needed to design a plastic daily necessities overmolding injection mold that can overcome the above-mentioned shortcomings.

[0003] In order to overcome the shortcomings of the existing technology, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses an injection mold for processing daily necessities [application number: 202023059833.5], which includes a barrel box body, an upper mold is vertically arranged in the inner cavity of the barrel box body, a lifting plate is horizontally arranged below the upper mold, and a lower mold is vertically arranged on the upper surface of the lifting plate. The bottom of the upper mold is provided with an injection cavity adapted to the lower mold, and the bottom of the barrel box is provided with a through opening adapted to the lifting plate. Summary of the Invention

[0004] The purpose of this utility model is to provide a plastic daily necessities overmolding injection mold in view of the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A plastic daily necessities overmolding mold comprises a plastic daily necessities molding lower mold and a plastic daily necessities molding upper mold, an injection molded part is provided above the plastic daily necessities molding upper mold, a main body molding lower cavity is provided in the plastic daily necessities molding lower mold, groove molding lower parts are provided at both ends of the main body molding lower cavity, a main body molding upper cavity is provided in the plastic daily necessities molding upper mold, groove molding upper parts are provided at both ends of the main body molding upper cavity, the main body molding lower cavity is arranged opposite to the main body molding upper cavity, the groove molding lower part is arranged opposite to the groove molding upper part, a synchronous diversion structure is provided between the plastic daily necessities molding lower mold and the plastic daily necessities molding upper mold, and the main body molding lower cavity and the main body molding upper cavity are respectively connected to the synchronous diversion structure.

[0007] In the above-mentioned plastic daily necessities overmolding injection mold, the groove strip molding lower part includes a first lower step surface arranged at the end of the main body molding lower cavity, and the first lower step surface is provided with a plastic part lower groove molding protrusion and a plurality of first lower groove molding convex strips, and the plastic part lower groove molding protrusion and the first lower groove molding convex strips are staggered.

[0008] In the above-mentioned plastic daily necessities overmolding injection mold, a first end ejection hole groove is provided in the first lower step surface, which passes through the plastic daily necessities molding lower mold, and the horizontal height of the first lower step surface is higher than the horizontal height of the bottom surface of the main body molding lower cavity.

[0009] In the above-mentioned plastic daily necessities overmolding mold, a second lower step surface is provided at one end of the main body molding lower cavity away from the first lower step surface, and a plurality of second lower jump groove molding ridges are provided on the second lower step surface.

[0010] In the above-mentioned plastic daily necessities overmolding injection mold, a second end ejection hole groove is provided in the second lower step surface, which passes through the plastic daily necessities molding lower mold, and the horizontal height of the second lower step surface is higher than the horizontal height of the bottom surface of the main body molding lower cavity.

[0011] In the above-mentioned plastic daily necessities overmolding injection mold, the groove molding upper part includes a first upper step surface arranged at the end of the main body molding upper cavity, and the first upper step surface is provided with a plastic part upper groove molding protrusion and a plurality of first upper groove molding convex strips, and the plastic part upper groove molding protrusion and the first upper groove molding convex strips are staggered.

[0012] In the above-mentioned plastic daily necessities overmolding injection mold, the horizontal height of the first upper step surface is lower than the top surface of the main body molding upper cavity, the upper groove molding protrusion of the plastic part is arranged opposite to the lower groove molding protrusion of the plastic part, and the first lower groove molding convex strip is arranged opposite to the first upper groove molding convex strip.

[0013] In the above-mentioned plastic daily necessities overmolding injection mold, a second upper step surface is provided at one end of the main body molding upper cavity away from the first upper step surface, and a plurality of second upper jump groove molding ridges are provided on the second upper step surface, and the second upper jump groove molding ridges are arranged opposite to the second lower jump groove molding ridges.

[0014] In the above-mentioned plastic daily necessities overmolding injection mold, the injection molded part includes an injection molding main plate arranged above the plastic daily necessities forming upper mold, and an injection molding main hole is provided in the injection molding main plate.

[0015] In the above-mentioned plastic daily necessities overmolding injection mold, the synchronous diversion structure includes an upper diversion channel and a lower diversion channel. The upper diversion channel is connected to the injection main hole, and the two sides of the upper diversion channel are connected to the upper cavity of the main body molding. The two sides of the lower diversion channel are connected to the lower cavity of the main body molding.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. During the injection molding process, the utility model places the lower mold for molding plastic daily necessities and the upper mold for molding plastic daily necessities close to each other, so that the lower cavity of the main body molding is arranged opposite to the upper cavity of the main body molding, and the lower part of the groove molding is arranged opposite to the upper part of the groove molding, forming two complete cavities. The molten material is injected into the synchronous diversion structure through the injection molding part, and is diverted by the synchronous diversion structure and then injected into the two cavities synchronously. The lower part of the groove molding cooperates with the upper part of the groove molding to synchronously mold the grooves and concave strip structures on the front and back surfaces of the plastic part. No subsequent pressing processing is required. The integrated double-out molding structure is adopted, which greatly increases the molding efficiency on the one hand and reduces the production cost on the other hand.

[0018] 2. The utility model is provided with a first lower step surface and a second lower step surface to form the lower portions of the thin side panels at both ends of the lower cavity of the main body.

[0019] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a structural diagram of the lower mold for molding plastic daily necessities.

[0022] Figure 3 It is a structural diagram of the upper mold for forming plastic daily necessities.

[0023] Figure 4 It is a structural diagram of the plastic part after molding.

[0024] In the figure: a lower mold 1 for forming plastic daily necessities, an upper mold 2 for forming plastic daily necessities, an injection molded part 3, a main body molding lower cavity 4, a groove molding lower part 5, a main body molding upper cavity 6, a groove molding upper part 7, a synchronous diversion structure 8, a first lower step surface 9, a lower groove molding protrusion 10 for the plastic part, a first lower strip groove molding ridge 11, a first end ejection hole groove 12, a second lower step surface 13, a second lower jump groove molding ridge 14, a second end ejection hole groove 15, a first upper step surface 16, an upper groove molding protrusion 17 for the plastic part, a first upper strip groove molding ridge 18, a second upper step surface 19, a second upper jump groove molding ridge 20, an injection molding main board 21, an injection molding main hole 22, an upper diversion channel 23, a lower diversion channel 24, and a plastic part 100. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a plastic daily necessities overmolding injection mold includes a plastic daily necessities molding lower mold 1 and a plastic daily necessities molding upper mold 2, an injection molded part 3 is provided above the plastic daily necessities molding upper mold 2, a main body molding lower cavity 4 is provided in the plastic daily necessities molding lower mold 1, and groove molding lower parts 5 are provided at both ends of the main body molding lower cavity 4, a main body molding upper cavity 6 is provided in the plastic daily necessities molding upper mold 2, and groove molding upper parts 7 are provided at both ends of the main body molding upper cavity 6, the main body molding lower cavity 4 is arranged opposite to the main body molding upper cavity 6, the groove molding lower part 5 is arranged opposite to the groove molding upper 7, a synchronous diversion structure 8 is provided between the plastic daily necessities molding lower mold 1 and the plastic daily necessities molding upper mold 2, and the main body molding lower cavity 4 and the main body molding upper cavity 6 are respectively connected to the synchronous diversion structure 8.

[0027] In this embodiment, during the injection molding process, the plastic daily necessities molding lower mold 1 and the plastic daily necessities molding upper mold 2 are brought close to each other, so that the main body molding lower cavity 4 and the main body molding upper cavity 6 are arranged opposite each other, and the groove molding lower part 5 and the groove molding upper part 7 are arranged opposite each other to form two complete cavities. The molten material is injected into the synchronous diversion structure 8 through the injection molding part 3, and is diverted through the synchronous diversion structure 8 and then injected into the two cavities simultaneously. The groove molding lower part 5 and the groove molding upper part 7 can cooperate with each other to synchronously mold the grooves and concave strip structures on the front and back surfaces of the plastic part. No subsequent pressing processing is required. The integrated double-out molding structure is adopted, which greatly increases the molding efficiency on the one hand and reduces the production cost on the other hand.

[0028] Combine Figure 1-4As shown, the groove molding lower part 5 includes a first lower step surface 9 arranged at the end of the main body molding lower cavity 4, and a plastic part lower groove molding protrusion 10 and a plurality of first lower groove molding ridges 11 are provided on the first lower step surface 9. The plastic part lower groove molding protrusion 10 and the first lower groove molding ridges 11 are staggered. A first end ejection hole groove 12 is provided in the first lower step surface 9 and passes through the plastic daily necessities molding lower mold 1. The horizontal height of the first lower step surface 9 is higher than the horizontal height of the bottom surface of the main body molding lower cavity 4. The main body molding lower cavity 4 is provided with a second lower step surface 13 at one end away from the first lower step surface 9. A plurality of second lower jump groove molding ridges 14 are provided on the second lower step surface 13. A second end ejection hole groove 15 is provided in the second lower step surface 13 and passes through the plastic daily necessities molding lower mold 1. The horizontal height of the second lower step surface 13 is higher than the horizontal height of the bottom surface of the main body molding lower cavity 4.

[0029] Specifically, during the injection molding process, the first lower step surface 9 and the second lower step surface 13 are used to form the lower parts of the thin side panels at both ends of the main body molding lower cavity 4. The lower groove molding protrusion 10 of the plastic part, several first lower stripe molding ridges 11 and several second lower jump groove molding ridges 14 can synchronously form the groove and concave strip structure on the back of the plastic part without the need for subsequent pressing processing. After the injection molding is completed, the ejector rod is used to eject the hole groove 12 from the first end and the ejection hole groove 15 from the second end to synchronously eject the molded plastic part from both ends to ensure stability during ejection.

[0030] The groove forming upper part 7 includes a first upper step surface 16 arranged at the end of the main body forming upper cavity 6, and a plastic part upper groove forming protrusion 17 and a plurality of first upper groove forming ridges 18 are provided on the first upper step surface 16. The plastic part upper groove forming protrusion 17 and the first upper groove forming ridges 18 are staggered. The horizontal height of the first upper step surface 16 is lower than the top surface of the main body forming upper cavity 6, the plastic part upper groove forming protrusion 17 is arranged opposite to the plastic part lower groove forming protrusion 10, and the first lower groove forming ridge 11 is arranged opposite to the first upper groove forming ridge 18. The main body forming upper cavity 6 is provided with a second upper step surface 19 at one end away from the first upper step surface 16, and a plurality of second upper jump groove forming ridges 20 are provided on the second upper step surface 19. The second upper jump groove forming ridge 20 is arranged opposite to the second lower jump groove forming ridge 14.

[0031] In this embodiment, during the injection molding process, the first upper step surface 16 and the second upper step surface 19 are used to form the upper part of the thin side plate at both ends of the main body molding lower cavity 4, and the groove forming protrusion 17 on the plastic part, a plurality of first upper groove forming ridges 18 and a plurality of second upper jump groove forming ridges 20 can simultaneously form the groove and concave strip structure on the front of the plastic part without the need for subsequent pressing processing.

[0032] Combine Figure 2 、 Figure 3 As shown, the injection molded part 3 includes an injection molding main board 21 arranged above the plastic daily necessities molding upper mold 2, and an injection molding main hole 22 is provided in the injection molding main board 21. The synchronous diversion structure 8 includes an upper diversion channel 23 and a lower diversion channel 24. The upper diversion channel 23 is connected to the injection molding main hole 22, and the two sides of the upper diversion channel 23 are connected to the main body molding upper cavity 6, and the two sides of the lower diversion channel 24 are connected to the main body molding lower cavity 4.

[0033] In this embodiment, during the injection molding process, the molten material is injected into the upper branch channel 23 through the injection molding main board 21. At this time, the upper branch channel 23 and the lower branch channel 24 cooperate to form a complete branch channel, which synchronously diverts the molten material into the two cavities, thereby accelerating the injection molding rate.

[0034] The working principle of this utility model is:

[0035] During the injection molding process, the lower mold 1 for forming plastic daily necessities and the upper mold 2 for forming plastic daily necessities are brought close to each other, so that the main body molding lower cavity 4 is arranged opposite to the main body molding upper cavity 6, and the groove molding lower part 5 is arranged opposite to the groove molding upper part 7, forming two complete cavities. The molten material is injected into the upper branch channel 23 through the injection molding main board 21. At this time, the upper branch channel 23 and the lower branch channel 24 cooperate to form a complete branch channel, which synchronously diverts the molten material to the two cavities, thereby accelerating the injection molding rate. The first lower step surface 9 and the second lower step surface 13 are used to form the lower part of the thin side plate at both ends of the main body molding lower cavity 4, the lower groove molding protrusion 10 of the plastic part, a plurality of first lower groove molding convex strips 11 and a plurality of second lower jumps The groove forming ridges 14 can simultaneously form the groove and concave strip structure on the back of the plastic part. The first upper step surface 16 and the second upper step surface 19 are used to form the upper parts of the thin side plates at both ends of the main body forming lower cavity 4. The groove forming protrusions 17 on the plastic part, a plurality of first upper groove forming ridges 18 and a plurality of second upper jump groove forming ridges 20 can simultaneously form the groove and concave strip structure on the front of the plastic part without the need for subsequent pressing processing. After the injection molding is completed, the ejector rod is used to eject the hole groove 12 and the second end ejection hole groove 15 from the first end to simultaneously eject the molded plastic part from both ends to ensure stability during ejection. The integrated double-out molding structure is adopted, which greatly increases the molding efficiency on the one hand and reduces the production cost on the other hand.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the spirit of the present invention.

[0037] Although the following terms are frequently used herein, such as the lower mold 1 for molding plastic daily necessities, the upper mold 2 for molding plastic daily necessities, the molded part 3, the main body molding lower cavity 4, the groove molding lower portion 5, the main body molding upper cavity 6, the groove molding upper portion 7, the synchronous diversion structure 8, the first lower step surface 9, the molded part lower groove molding protrusion 10, the first lower groove molding ridge 11, the first end ejection hole 12, the second lower step surface 13, the second lower jump groove molding ridge 14, the second end ejection hole 15, the first upper step surface 16, the molded part upper groove molding protrusion 17, the first upper groove molding ridge 18, the second upper step surface 19, the second upper jump groove molding ridge 20, the injection molding main plate 21, the injection molding main hole 22, the upper diversion channel 23, the lower diversion channel 24, and the molded part 100, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A plastic daily necessities overmolding injection mold, comprising a plastic daily necessities molding lower mold (1) and a plastic daily necessities molding upper mold (2), characterized in that: An injection molded part (3) is provided above the upper mold (2) for forming plastic daily necessities; a main body molding lower cavity (4) is provided in the lower mold (1) for forming plastic daily necessities; groove molding lower parts (5) are provided at both ends of the main body molding lower cavity (4); a main body molding upper cavity (6) is provided in the upper mold (2) for forming plastic daily necessities; groove molding upper parts (7) are provided at both ends of the main body molding upper cavity (6); the main body molding lower cavity (4) and the main body molding upper cavity (6) are arranged opposite each other; the groove molding lower part (5) and the groove molding upper part (7) are arranged opposite each other; a synchronous diversion structure (8) is provided between the lower mold (1) for forming plastic daily necessities and the upper mold (2); the main body molding lower cavity (4) and the main body molding upper cavity (6) are respectively connected to the synchronous diversion structure (8).

2. The plastic daily necessities overmolding mold according to claim 1, characterized in that: The groove forming lower part (5) comprises a first lower step surface (9) arranged at the end of the main body forming lower cavity (4); the first lower step surface (9) is provided with a plastic part lower groove forming protrusion (10) and a plurality of first lower groove forming ridges (11); the plastic part lower groove forming protrusions (10) and the first lower groove forming ridges (11) are arranged in an alternating manner.

3. The plastic daily necessities overmolding mold according to claim 2, characterized in that: A first end ejection hole groove (12) passing through the lower mold (1) for forming a plastic daily-use product is provided in the first lower step surface (9), and the horizontal height of the first lower step surface (9) is higher than the horizontal height of the bottom surface of the main body molding lower cavity (4).

4. The plastic daily necessities overmolding mold according to claim 3, characterized in that: The main body molding lower cavity (4) is provided with a second lower step surface (13) at one end away from the first lower step surface (9), and the second lower step surface (13) is provided with a plurality of second lower jump groove molding convex strips (14).

5. The plastic daily necessities overmolding mold according to claim 4, characterized in that: The second lower step surface (13) is provided with a second end ejection hole groove (15) that passes through the lower mold (1) for forming a plastic daily-use product. The horizontal height of the second lower step surface (13) is higher than the horizontal height of the bottom surface of the main body molding lower cavity (4).

6. The plastic daily necessities overmolding mold according to claim 5, characterized in that: The groove forming upper part (7) comprises a first upper step surface (16) arranged at the end of the main body forming upper cavity (6); the first upper step surface (16) is provided with a plastic upper groove forming protrusion (17) and a plurality of first upper groove forming ridges (18); the plastic upper groove forming protrusions (17) and the first upper groove forming ridges (18) are arranged in an alternating manner.

7. The plastic daily necessities overmolding mold according to claim 6, characterized in that: The horizontal height of the first upper step surface (16) is lower than the top surface of the main body molding upper cavity (6), the upper groove molding protrusion (17) of the plastic part is arranged opposite to the lower groove molding protrusion (10) of the plastic part, and the first lower groove molding ridge (11) is arranged opposite to the first upper groove molding ridge (18).

8. The plastic daily necessities overmolding mold according to claim 7, characterized in that: The main body molding upper cavity (6) is provided with a second upper stepped surface (19) at one end away from the first upper stepped surface (16), and a plurality of second upper skip groove molding ridges (20) are provided on the second upper stepped surface (19), and the second upper skip groove molding ridges (20) are arranged opposite to the second lower skip groove molding ridges (14).

9. The plastic daily necessities overmolding mold according to claim 8, characterized in that: The injection molded part (3) comprises an injection molding main plate (21) arranged above the upper mold (2) for forming plastic daily necessities, and an injection molding main hole (22) is provided in the injection molding main plate (21).

10. The plastic daily necessities overmolding mold according to claim 9, characterized in that: The synchronous flow-dividing structure (8) comprises an upper flow-dividing channel (23) and a lower flow-dividing channel (24); the upper flow-dividing channel (23) is connected to the injection main hole (22); both sides of the upper flow-dividing channel (23) are connected to the main body molding upper cavity (6); and both sides of the lower flow-dividing channel (24) are connected to the main body molding lower cavity (4).

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