Brush strip injection mold easy to demold and form bubbles

Abstract

The utility model provides a brush strip injection mold easy to demold and form bubbles, and belongs to the technical field of molds. The brush strip forming mold comprises an upper mold plate and a lower mold plate, a plurality of brush strip forming cavities composed of brush strip handle forming parts and brush strip frame forming parts are formed between the upper mold plate and the lower mold plate, the brush strip frame forming parts are in a flat oval shape, and the length of the brush strip frame forming parts is larger than that of the brush strip handle forming parts. The brush strip handle forming part and the brush strip frame body forming part in every two adjacent brush strip forming cavities are arranged in opposite directions, and a single-point glue inlet multi-outlet runner structure is further arranged on the upper mold plate. A brush strip forming cavity between the upper mold plate and the lower mold plate can be used for injection molding of bubble blowing brush strips; compared with the same-direction arrangement, the brush strip handle forming parts and the brush strip frame forming parts in the two adjacent brush strip forming cavities are arranged in the opposite directions, so that the space in the mold can be reasonably utilized, the number of the brush strip forming cavities in the mold can be increased, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection mold for easily demoulding foam brush strips. Background Art

[0002] The bubble blowing brush is a toy that is deeply loved by children. The brush is generally formed by injection molding, and the brush is generally formed by a handle and a frame. In the prior art, during injection molding, the handle parts and the frame parts in the multiple molding cavities in the mold are correspondingly arranged and parallel to each other, so that glue can be simultaneously injected into all the molding cavities through the same glue feeding channel. However, since the width of the frame part of the molding cavity is much larger than the width of the handle, the corresponding arrangement of the handle parts and the frame parts in the multiple molding cavities does not reasonably utilize the space in the mold, and the number of molding cavities that can be set in the mold may be increased. Utility Model Content

[0003] The utility model aims to solve the above problems and provides an injection mould for a foam brush strip which is easy to demould.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A mold for easily demolding foaming brush strips, comprising an upper mold plate and a lower mold plate, wherein a plurality of brush strip forming cavities consisting of a brush strip handle forming part and a brush strip frame forming part are arranged between the upper mold plate and the lower mold plate, wherein the brush strip frame forming part is flat and elliptical and the length of the brush strip frame forming part is greater than the length of the brush strip handle forming part, and the brush strip handle forming part and the brush strip frame forming part in two adjacent brush strip forming cavities are arranged in reverse, and a single-point glue inlet and multi-outlet flow channel structure is also provided on the upper mold plate.

[0006] In the above-mentioned easy-to-demold foam brush strip injection mold, the single-point glue inlet and multi-outlet flow channel structure includes a glue inlet and a diverter flow channel, the glue inlet is arranged on the side of the brush strip handle molding part close to the brush strip frame molding part, the glue inlet of the diverter flow channel is connected to the end of the brush strip handle molding part away from the brush strip frame molding part, and the glue outlet of the diverter flow channel is connected to the brush strip frame molding part in the brush strip molding cavity adjacent to the brush strip handle molding part.

[0007] In the above-mentioned easy-to-demold foam brush strip injection mold, the single-point glue inlet and multi-outlet flow channel structure is provided with a plurality of them and corresponds one-to-one to a plurality of brush strip molding cavities.

[0008] In the above-mentioned easy-to-demold foam brush strip injection mold, the diverter flow channel has one or two glue outlets. When the number of glue outlets in the diverter flow channel is one, the cross-section of the diverter flow channel is L-shaped. When the number of glue outlets in the diverter flow channel is two, the cross-section of the diverter flow channel is T-shaped.

[0009] In the above-mentioned easy-to-demold foam brush strip injection mold, the brush strip handle forming part is formed by a combination of brush strip handle forming grooves correspondingly arranged on the upper template and the lower template, and the brush strip frame forming part is formed by a combination of brush strip frame forming grooves correspondingly arranged on the upper template and the lower template.

[0010] In the above-mentioned injection mold for easily demoulding foam brush strips, a liquid retention groove molding structure is also provided in the molding groove of the brush strip frame.

[0011] In the above-mentioned easy-to-demold foam brush strip injection mold, the liquid groove molding structure includes a plurality of liquid groove molding blocks that are protruding and evenly spaced along the circumference of the brush strip frame molding groove, the two ends of the liquid groove molding blocks are connected to the inner walls on both sides of the brush strip frame molding groove, and the height of the top of the liquid groove molding block is lower than the opening side plane of the brush strip frame molding groove.

[0012] In the above-mentioned easy-to-release foam brush strip injection mold, a composite ejection mechanism is also provided on the lower mold plate.

[0013] In the above-mentioned easy-to-demold foam brush strip injection mold, the composite ejection mechanism includes a top plate arranged on the lower side of the lower mold plate, and a plurality of frame top rods connected to the brush strip frame forming part and a plurality of handle top rods connected to the brush strip handle forming part are fixedly connected to the top plate. The plurality of frame top rods are arranged circumferentially along the brush strip frame forming part and the plurality of frame top rods are symmetrically arranged along the axial center line of the brush strip handle forming part, and the handle top rod is arranged on the side of the brush strip handle forming part away from the brush strip frame forming part.

[0014] In the above-mentioned easy-to-demold foam brush strip injection mold, an air cap flow channel is also provided on the side of the brush strip handle forming part close to the brush strip frame forming part, and a valve is provided on the top of the air cap flow channel.

[0015] Compared with the existing technology, the advantages of the utility model are:

[0016] 1. The brush strip molding cavity between the upper template and the lower template can be used for injection molding a bubble blowing brush strip. The brush strip handle molding part and the brush strip frame molding part in the two adjacent brush strip molding cavities are arranged in opposite directions, which can more reasonably occupy the space in the mold, thereby increasing the number of brush strip molding cavities that can be set in the mold to improve production efficiency. When the single-point glue-injection and multi-outlet flow channel structure injects glue into the brush strip molding cavity, the glue can flow out from the brush strip handle molding part after filling the brush strip handle molding part and inject glue into the brush strip frame molding part in one or two adjacent brush strip molding cavities, so that the glue in the brush strip handle molding part with a faster filling speed in the brush strip molding cavity is filled and then injected into the brush strip frame molding part in the adjacent brush strip molding cavity, so as to balance the different filling speeds of the brush strip frame molding part and the brush strip handle molding part.

[0017] 2. After the glue is injected from the side of the brush strip handle forming part close to the brush strip frame forming part through the glue inlet, the glue is automatically diverted to the brush strip handle forming part and the brush strip frame forming part. Since the filling efficiency of the brush strip frame forming part is obviously slower than that of the brush strip handle forming part, when the glue fills the brush strip handle forming part, it can flow out from the end of the brush strip handle forming part away from the brush strip frame forming part through the diversion flow channel and flow into the brush strip frame forming part in one or two adjacent brush strip forming cavities. The glue flowing out from the diversion flow channel can flow into the brush strip frame forming part from the end of the brush strip handle forming part away from the brush strip handle forming part, so that the glue can be injected inward from both ends of the brush strip frame forming part, thereby improving the glue injection efficiency at the brush strip frame forming part. Since each brush strip forming cavity corresponds to a single-point glue injection and multi-outlet flow channel structure, they can cooperate with each other so that the brush strip frame forming part in each brush strip forming cavity will be assisted in the glue injection by the glue flowing in from the diversion flow channel.

[0018] Other advantages, objectives and features of the present invention will be embodied 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

[0019] Figure 1 It is a structural schematic diagram of the upper template;

[0020] Figure 2 It is a structural diagram of the lower template;

[0021] Figure 3 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 4 yes Figure 2 A magnified schematic diagram of point B in the middle.

[0023] In the figure, an upper template 1, a lower template 2, a brush strip handle forming part 3, a brush strip frame forming part 4, a brush strip forming cavity 5, a single-point glue inlet and multiple outlet flow channel structure 6, a glue inlet 7, a diversion flow channel 8, a brush strip handle forming groove 9, a brush strip frame forming groove 10, a liquid retention groove forming block 11, a top plate 12, a frame top rod 13, a handle top rod 14, and an air top flow channel 15. DETAILED DESCRIPTION

[0024] like Figure 1 and Figure 2As shown, an injection mold for easily demolding foam brush strips comprises an upper mold plate 1 and a lower mold plate 2, wherein a plurality of brush strip forming cavities 5 consisting of a brush strip handle forming part 3 and a brush strip frame forming part 4 are arranged between the upper mold plate 1 and the lower mold plate 2, wherein the brush strip frame forming part 4 is flat and elliptical and the length of the brush strip frame forming part 4 is greater than the length of the brush strip handle forming part 3, and the brush strip handle forming part 3 and the brush strip frame forming part 4 in two adjacent brush strip forming cavities 5 are arranged in reverse, and a single-point glue inlet and multi-outlet flow channel structure 6 is also provided on the upper mold plate 1.

[0025] In the utility model, the brush strip forming cavity 5 between the upper mold plate and the lower mold plate can be used for injection molding of the bubble blowing brush strip. The brush strip handle forming part 3 and the brush strip frame forming part 4 in the two adjacent brush strip forming cavities 5 are arranged in opposite directions, which can more reasonably occupy the space in the mold than the same direction, thereby increasing the number of brush strip forming cavities 5 that can be arranged in the mold to improve production efficiency.

[0026] Furthermore, when the single-point glue-injection and multi-outlet flow channel structure 6 injects glue into the brush strip molding cavity, the glue can flow out from the brush strip handle molding portion 3 after filling the brush strip handle molding portion 3 and inject glue into the brush strip frame molding portion 4 in one or two adjacent brush strip molding cavities, so that the glue in the brush strip handle molding portion 3 with a faster filling speed in the brush strip molding cavity is filled and then inject glue into the brush strip frame molding portion 4 in the adjacent brush strip molding cavity, so as to balance the different filling speeds of the brush strip frame molding portion 4 and the brush strip handle molding portion 3.

[0027] Specifically, the single-point glue-inlet and multi-outlet flow channel structure 6 includes a glue inlet 7 and a diverter flow channel 8. The glue inlet 7 is arranged on the side of the brush strip handle molding part 3 close to the brush strip frame molding part 4, the glue inlet of the diverter flow channel 8 is connected to the end of the brush strip handle molding part 3 away from the brush strip frame molding part 4, and the glue outlet of the diverter flow channel 8 is connected to the brush strip frame molding part 4 in the brush strip molding cavity 5 adjacent to the brush strip handle molding part 3. The single-point glue-inlet and multi-outlet flow channel structure 6 is provided with a plurality of glue inlets and corresponds one-to-one to a plurality of brush strip molding cavities 5. After the glue is injected from the side of the brush strip handle forming part 3 close to the brush strip frame forming part 4 through the glue inlet 7, the glue is automatically diverted to the brush strip handle forming part 3 and the brush strip frame forming part 4. Since the filling efficiency of the brush strip frame forming part 4 is obviously slower than that of the brush strip handle forming part 3, when the glue fills the brush strip handle forming part 3, it can flow out from the end of the brush strip handle forming part 3 away from the brush strip frame forming part 4 through the diversion flow channel 8 and flow into the brush strip frame forming part 4 in one or two adjacent brush strip forming cavities. The glue flowing out from the diversion flow channel can flow into the brush strip frame forming part from the end of the brush strip handle forming part 3 away from the brush strip handle forming part 3, so that the glue can be injected inward from both ends of the brush strip frame forming part, thereby improving the glue injection efficiency at the brush strip frame forming part. Since each brush strip forming cavity 5 corresponds to a single-point glue injection and multi-outlet flow channel structure 6, they can cooperate with each other so that the brush strip frame forming part in each brush strip forming cavity 5 will be assisted in the glue injection by the glue flowing in from the diversion flow channel.

[0028] Specifically, the diverter channel 8 has one or two glue outlets. When the number of glue outlets in the diverter channel 8 is one, the cross-section of the diverter channel 8 is L-shaped. When the number of glue outlets in the diverter channel 8 is two, the cross-section of the diverter channel 8 is T-shaped.

[0029] Specifically, the brush handle forming part 3 is formed by the brush handle forming grooves 9 correspondingly arranged on the upper template 1 and the lower template 2, and the brush frame forming part 4 is formed by the brush frame forming grooves 10 correspondingly arranged on the upper template 1 and the lower template 2, and a liquid retention groove forming structure is also provided in the brush frame forming groove 10. The liquid retention groove forming structure can form a plurality of liquid flow grooves on the brush strip so that the brush strip can better adhere to the bubble blowing liquid.

[0030] Specifically, the liquid groove forming structure includes a plurality of liquid groove forming blocks 11 that are protrudingly arranged and evenly spaced along the circumferential direction of the brush strip frame forming groove 10, the two ends of the liquid groove forming blocks 11 are connected to the inner walls of the two sides of the brush strip frame forming groove 10, and the height of the top of the liquid groove forming block 11 is lower than the opening side plane of the brush strip frame forming groove 10. The liquid groove forming blocks 11 that are protrudingly arranged in the brush strip frame forming groove 10 can form a liquid groove on the brush strip frame during the brush strip injection molding.

[0031] Specifically, a composite ejection mechanism is also provided on the lower template 2, and the composite ejection mechanism includes a top plate 12 arranged on the lower side of the lower template 2, and a plurality of frame ejector rods 13 connected to the brush strip frame forming part 4 and a plurality of handle ejector rods 14 connected to the brush strip handle forming part 3 are fixedly connected to the top plate 12, a plurality of frame ejector rods 13 are arranged circumferentially along the brush strip frame forming part 4 and a plurality of frame ejector rods 13 are symmetrically arranged along the axis of the brush strip handle forming part 3, the handle ejector rod 14 is arranged on the side of the brush strip handle forming part 3 away from the brush strip frame forming part 4, and an air ejector channel 15 is also provided on the side of the brush strip handle forming part 3 close to the brush strip frame forming part 4, and a valve is provided at the top of the air ejector channel 15. After the product is injection molded and before it is ejected, high-pressure gas can be introduced into the brush strip molding cavity through the air top flow channel to initially separate the brush strip and the lower template, and then the top plate is driven to move upward to drive several frame top rods 13 and handle top rods 14 to move upward synchronously, so that thrust can be applied to the frame part and the handle part of the brush strip respectively to eject the product without damage.

[0032] The working principle of the utility model is that the brush strip forming cavity 5 between the upper mold plate and the lower mold plate can be used for injection molding of the bubble blowing brush strip, and the brush strip handle forming part 3 and the brush strip frame forming part 4 in the two adjacent brush strip forming cavities 5 are arranged in opposite directions, which can more reasonably utilize the space in the mold, thereby increasing the number of brush strip forming cavities 5 that can be arranged in the mold to improve production efficiency.

[0033] When the single-point glue-injection and multi-outlet flow channel structure 6 injects glue into the brush strip molding cavity, after the glue fills the brush strip handle molding part 3, it can flow out from the brush strip handle molding part 3 and inject glue into the brush strip frame molding part 4 in one or two adjacent brush strip molding cavities, so that the glue in the brush strip handle molding part 3 with a faster filling speed in the brush strip molding cavity is filled, and then the glue is injected into the brush strip frame molding part 4 in the adjacent brush strip molding cavity to balance the different filling speeds of the brush strip frame molding part 4 and the brush strip handle molding part 3. After the glue is injected from the side of the brush strip handle molding part 3 close to the brush strip frame molding part 4 through the glue inlet 7, the glue is automatically diverted to flow to the brush strip handle molding part 3 and the brush strip frame molding part 4. Due to the filling efficiency of the brush strip frame molding part 4 The rate is obviously slower than that of the brush strip handle forming part 3. When the glue liquid fills the brush strip handle forming part 3, it can flow out from the end of the brush strip handle forming part 3 away from the brush strip frame forming part 4 through the diverter flow channel 8 and flow into the brush strip frame forming part 4 in one or two adjacent brush strip forming cavities. The glue liquid flowing out of the diverter flow channel can flow into the brush strip frame forming part 4 from the end of the brush strip handle forming part 3 away from the brush strip handle forming part 3, so that the glue liquid can be injected inward from both ends of the brush strip frame forming part at the same time, thereby improving the injection efficiency of the brush strip frame forming part. Since each brush strip forming cavity 5 corresponds to a single-point injection and multi-outlet flow channel structure 6, they can cooperate with each other so that the brush strip frame forming part in each brush strip forming cavity 5 can be assisted in injection by the glue liquid flowing in from the diverter flow channel;

[0034] The liquid groove molding structure can form multiple liquid flow grooves on the brush strip so that the brush strip can better adhere to the bubble blowing liquid. The liquid groove molding block 11 protruding from the brush strip frame molding groove 10 can form a liquid groove on the brush strip frame during the brush strip injection molding. After the product is injection molded and before the product is ejected, high-pressure gas can be introduced into the brush strip molding cavity through the gas top flow channel to initially separate the brush strip and the lower template, and then the top plate is driven to move upward to drive a number of frame top rods 13 and handle top rods 14 to move upward synchronously, so that thrust can be applied to the frame part and the handle part of the brush strip respectively to eject the product without damage.

[0035] 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 in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0036] Although this article makes more frequent use of the upper template 1, the lower template 2, the brush strip handle forming part 3, the brush strip frame forming part 4, the brush strip forming cavity 5, the single-point glue inlet and multi-outlet flow channel structure 6, the glue inlet 7, the diversion flow channel 8, the brush strip handle forming groove 9, the brush strip frame forming groove 10, the liquid retention groove forming block 11, the top plate 12, the frame top rod 13, the handle top rod 14, the air top flow channel 15, etc., these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An easy-to-release foam brush strip injection mold, comprising an upper mold plate (1) and a lower mold plate (2), It is characterized in that A plurality of brush strip forming cavities (5) consisting of a brush strip handle forming portion (3) and a brush strip frame forming portion (4) are arranged between the upper template (1) and the lower template (2); the brush strip frame forming portion (4) is flat and elliptical and the length of the brush strip frame forming portion (4) is greater than the length of the brush strip handle forming portion (3); the brush strip handle forming portion (3) and the brush strip frame forming portion (4) in two adjacent brush strip forming cavities (5) are arranged in opposite directions; and a single-point glue inlet and multi-outlet flow channel structure (6) is also provided on the upper template (1).

2. The easy-to-release foam brush strip injection mold according to claim 1, It is characterized in that The single-point glue inlet and multi-outlet flow channel structure (6) comprises a glue inlet (7) and a diverter flow channel (8), wherein the glue inlet (7) is arranged on the side of the brush strip handle forming part (3) close to the brush strip frame forming part (4), the glue liquid inlet of the diverter flow channel (8) is connected to the end of the brush strip handle forming part (3) away from the brush strip frame forming part (4), and the glue liquid outlet of the diverter flow channel (8) is connected to the brush strip frame forming part (4) in the brush strip forming cavity (5) adjacent to the brush strip handle forming part (3).

3. The easy-to-release foam brush strip injection mold according to claim 2, It is characterized in that The single-point glue inlet and multi-outlet flow channel structure (6) is provided with a plurality of channels corresponding one to one with the plurality of brush strip forming cavities (5).

4. The easy-to-release foam brush strip injection mold according to claim 2, It is characterized in that The diversion channel (8) has one or two glue outlets. When the number of glue outlets in the diversion channel (8) is one, the cross-section of the diversion channel (8) is L-shaped. When the number of glue outlets in the diversion channel (8) is two, the cross-section of the diversion channel (8) is T-shaped.

5. The easy-to-release foam brush strip injection mold according to claim 1, It is characterized in that The brush strip handle forming portion (3) is formed by combining brush strip handle forming grooves (9) correspondingly arranged on the upper template (1) and the lower template (2), and the brush strip frame forming portion (4) is formed by combining brush strip frame forming grooves (10) correspondingly arranged on the upper template (1) and the lower template (2).

6. The easy-to-release foam brush strip injection mold according to claim 5, It is characterized in that A liquid retaining groove forming structure is also provided in the brush strip frame forming groove (10).

7. The easy-to-release foam brush strip injection mold according to claim 6, It is characterized in that The liquid retention groove forming structure comprises a plurality of liquid retention groove forming blocks (11) which are protrudingly arranged and evenly spaced along the circumference of the brush strip frame forming groove (10); the two ends of the liquid retention groove forming blocks (11) are connected to the inner walls of both sides of the brush strip frame forming groove (10); and the height of the top end of the liquid retention groove forming block (11) is lower than the opening side plane of the brush strip frame forming groove (10).

8. The easy-to-release foam brush strip injection mold according to claim 5, It is characterized in that The lower template (2) is also provided with a composite ejection mechanism.

9. The easy-to-release foam brush strip injection mold according to claim 8, It is characterized in that The composite ejection mechanism comprises a top plate (12) arranged at the lower side of the lower template (2); a plurality of frame top rods (13) connected to the brush strip frame forming part (4) and a plurality of handle top rods (14) connected to the brush strip handle forming part (3) are fixedly connected to the top plate (12); the plurality of frame top rods (13) are arranged along the circumference of the brush strip frame forming part (4) and the plurality of frame top rods (13) are symmetrically arranged along the axis of the brush strip handle forming part (3); and the handle top rod (14) is arranged on the side of the brush strip handle forming part (3) away from the brush strip frame forming part (4).

10. The easy-to-release foam brush strip injection mold according to claim 9, It is characterized in that The brush strip handle forming part (3) is also provided with an air cap flow channel (15) on one side close to the brush strip frame forming part (4), and a valve is provided at the top of the air cap flow channel (15).

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