Garbage can mold with balanced hot runner system

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a garbage can mold with a balanced hot runner system. The garbage can forming die comprises a garbage can forming lower die and a garbage can forming upper die, and two garbage can forming protrusions which are symmetrical along the center line of the garbage can forming lower die are arranged in the garbage can forming lower die. In the injection molding process, the garbage can molding lower mold and the garbage can molding upper mold are close to each other, so that the garbage can molding bulge is propped against and matched with the garbage can molding cavity to form a complete cavity, and a molten material is injected into the cavity through the injection molding shunting piece; cooling water is introduced into the internal cooling balance cooling assembly and the upper mold cooling part, the inner side of the plastic part is cooled through the internal cooling balance cooling assembly, the outer side of the plastic part is cooled through the upper mold cooling part, internal and external multi-channel cooling is adopted, cooling balance of the plastic part is achieved, expansion or sinking of the inner side and the outer side is avoided, and the quality of the plastic part is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a trash can mold with a balanced hot runner system. Background Art

[0002] An injection mold is a tool for producing plastic products; it can mass-produce certain plastic parts with complex shapes. An injection mold is usually composed of a movable mold and a fixed mold. During production, the mold is installed in an injection molding machine, and the injection molding machine uses high pressure to inject the heated and melted plastic into the mold cavity of the injection mold. After cooling and solidification, the injection molding machine pulls the movable mold and the fixed mold apart, and then the injection molded product is pushed out by the ejection mechanism, thus completing one injection molding. Plastic trash cans are also injection molded by molds. During the injection molding process of existing plastic trash can molds, due to the deep cavity of the trash can, single-mold external cooling can easily lead to uneven cooling of the inside and outside of the plastic part, resulting in expansion or depression, and unbalanced cooling of the inside and outside of the plastic part, resulting in poor quality of the plastic part. Therefore, it is urgent to design a trash can mold with a balanced hot runner system that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a trash can molding mold [application number: 202020697747.8]. Four molding sliders are arranged between the bottom surface of the upper module and the top surface of the lower module, which are assembled to form a mold cavity. The core column at the bottom surface of the square groove of the lower module is correspondingly inserted into the mold cavity, and a mold cavity is formed between the core column, the hot runner plate and the mold cavity; the top and bottom of the four molding sliders are respectively inserted into the depression of the square groove in the upper module and the depression of the square groove in the lower module, and the outer inclined surface thereof is fitted with the inclined surface of the depression; the inclined guide column of the upper module is correspondingly inserted into the inclined guide hole of the molding slider; the outer side surfaces of the two molding sliders corresponding to each other are provided with hook blocks and positioning sleeves that are inserted into each other, and the lower template, the lower module and the core column are all provided with corresponding air ducts; the positioning strips on the two molding sliders are inserted into the through grooves on the other two molding sliders; the inner side surfaces of the four molding sliders are engraved with textures. Summary of the invention

[0004] The utility model aims to solve the above problems and provides a trash can mold with a balanced hot runner system.

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

[0006] A trash can mold with a balanced hot runner system comprises a trash can molding lower mold and a trash can molding upper mold, wherein the trash can molding lower mold is provided with two trash can molding protrusions symmetrical along the center line of the trash can molding lower mold, and the trash can molding upper mold is provided with two trash can molding chambers symmetrical along the center line of the trash can molding upper mold, the trash can molding protrusions correspond to the positions of the trash can molding chambers and are matched in shape, a protrusion positioning seat is provided between the trash can molding lower mold and the trash can molding upper mold, the protrusion positioning seat is snap-fitted with the trash can molding protrusions, an injection molding diverter is provided above the trash can molding upper mold, an upper mold cooling part staggered with the trash can molding chamber is provided in the trash can molding upper mold, an internal cooling balanced cooling component is provided in the trash can molding protrusions, and the internal cooling balanced cooling component corresponds to the position of the upper mold cooling part.

[0007] In the above-mentioned trash can mold with a balanced hot runner system, the internal cooling balanced cooling component includes a plurality of internal cooling water channels arranged in the trash can molding protrusion, and a lower mold elastic demolding member is provided on the top of the internal cooling water channel. The lower mold elastic demolding member is slidably matched with the trash can molding protrusion and the top of the lower mold elastic demolding member is flush with the trash can molding protrusion.

[0008] In the above-mentioned trash can mold with a balanced hot runner system, the lower mold elastic demolding member includes a lower mold demolding slide shaft arranged on the top of the internal cooling water channel, and a first spring is arranged in the lower mold demolding slide shaft.

[0009] In the above-mentioned trash can mold with a balanced hot runner system, a lower mold inlet is opened on the side of the trash can molding lower mold, and the lower mold inlet is connected to the internal cooling water channel.

[0010] In the above-mentioned trash can mold with a balanced hot runner system, an upper mold elastic demolding member is provided in the trash can molding chamber, and the upper mold elastic demolding member is located directly above the lower mold demolding slide shaft.

[0011] In the above-mentioned trash can mold with a balanced hot runner system, the upper mold elastic demolding member includes an upper mold demolding slide shaft arranged in the trash can molding chamber, and a second spring is arranged in the upper mold demolding slide shaft.

[0012] In the above-mentioned trash can mold with a balanced hot runner system, the upper mold cooling part includes a longitudinal cooling channel and a plurality of transverse cooling channels arranged in the trash can molding upper mold, and the longitudinal cooling channel and the plurality of transverse cooling channels are respectively staggered with the trash can molding cavity.

[0013] In the above-mentioned trash can mold with a balanced hot runner system, an upper mold inlet is further provided in the trash can molding upper mold, and the upper mold inlet is connected to the longitudinal cooling channel.

[0014] In the above-mentioned trash can mold with a balanced hot runner system, the transverse cooling channel runs through the trash can molding upper mold, and the plurality of transverse cooling channels are parallel to each other.

[0015] In the above-mentioned trash can mold with a balanced hot runner system, the injection molding flow diverter includes an injection molding main board and an injection molding tube arranged above the trash can molding upper mold.

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

[0017] 1. During the injection molding process, the utility model brings the trash can molding lower mold and the trash can molding upper mold close to each other, so that the trash can molding protrusion abuts against the trash can molding chamber to form a complete cavity, and the molten material is injected into the cavity through the injection molding diverter. After the injection molding is completed, the cooling water is introduced into the internal cooling balance cooling component and the upper mold cooling part, and the inner side of the plastic part is cooled by the internal cooling balance cooling component, and the outer side of the plastic part is cooled by the upper mold cooling part. The internal and external multi-channel cooling is adopted to achieve the cooling balance of the plastic part, avoid the expansion or depression of the inside and outside, and improve the quality of the plastic part.

[0018] 2. After the mold is opened, the lower mold demoulding slide shaft can be moved upward by the pressure of cooling water, and the lower mold demoulding slide shaft is used to assist in demoulding the plastic part, thereby reducing the ejector structure, reducing costs, facilitating subsequent demoulding, and the first spring can be easily reset.

[0019] 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

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

[0021] Figure 2 It is a top view of the utility model.

[0022] Figure 3 yes Figure 2 Schematic diagram of the cross section at AA in the middle.

[0023] Figure 4 It is a partial structural schematic diagram of the utility model.

[0024] Figure 5 It is a schematic diagram of the structure of the upper mold for forming a trash can.

[0025] In the figure: trash can molding lower mold 1, trash can molding upper mold 2, trash can molding protrusion 3, trash can molding chamber 4, protrusion positioning seat 5, injection molding diverter 6, upper mold cooling part 7, internal cooling balance cooling component 8, internal cooling water channel 9, lower mold elastic demolding part 10, lower mold demolding slide shaft 11, first spring 12, lower mold inlet 13, upper mold elastic demolding part 14, upper mold demolding slide shaft 15, second spring 16, longitudinal cooling channel 17, transverse cooling channel 18, upper mold inlet 19, injection molding main board 20, injection molding tube 21. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-5 As shown, a trash can mold with a balanced hot runner system includes a trash can molding lower mold 1 and a trash can molding upper mold 2, the trash can molding lower mold 1 is provided with two trash can molding protrusions 3 symmetrical along the center line of the trash can molding lower mold 1, the trash can molding upper mold 2 is provided with two trash can molding chambers 4 symmetrical along the center line of the trash can molding upper mold 2, the trash can molding protrusions 3 correspond to the positions of the trash can molding chambers 4 and are matched in shape, a protrusion positioning seat 5 is provided between the trash can molding lower mold 1 and the trash can molding upper mold 2, the protrusion positioning seat 5 is snap-fitted with the trash can molding protrusion 3, an injection molding diverter 6 is provided above the trash can molding upper mold 2, an upper mold cooling part 7 staggered with the trash can molding chamber 4 is provided in the trash can molding upper mold 2, an internal cooling balanced cooling component 8 is provided in the trash can molding protrusion 3, and the internal cooling balanced cooling component 8 corresponds to the position of the upper mold cooling part 7.

[0028] In this embodiment, during the injection molding process, the trash can molding lower mold 1 and the trash can molding upper mold 2 are brought close to each other, so that the trash can molding protrusion 3 and the trash can molding chamber 4 are abutted and matched to form a complete cavity, and the molten material is injected into the cavity through the injection molding diverter 6. After the injection molding is completed, the cooling water is passed into the internal cooling balance cooling component 8 and the upper mold cooling part 7. The inner side of the plastic part is cooled by the internal cooling balance cooling component 8, and the outer side of the plastic part is cooled by the upper mold cooling part 7. The internal and external multi-channel cooling is adopted to achieve the cooling balance of the plastic part, avoid the expansion or depression of the inside and outside, and improve the quality of the plastic part.

[0029] Combination Figure 1-5 As shown, the internal cooling balanced cooling component 8 includes a plurality of internal cooling water channels 9 arranged in the trash can molding protrusion 3, and a lower mold elastic demolding member 10 is provided on the top of the internal cooling water channel 9. The lower mold elastic demolding member 10 is slidably matched with the trash can molding protrusion 3 and the top of the lower mold elastic demolding member 10 is flush with the trash can molding protrusion 3.

[0030] Specifically, after the injection molding is completed, cooling water is introduced into the internal cooling water channel 9 to cool the inside of the plastic part. After the mold is opened, the pressure of the cooling water can move the lower mold elastic demolding member 10 upward, and the lower mold elastic demolding member 10 is used to assist in demolding the plastic part, thereby reducing the ejector structure, reducing costs, and facilitating subsequent demolding.

[0031] Combination Figure 3 As shown, the lower mold elastic demolding member 10 includes a lower mold demolding slide shaft 11 arranged on the top of the internal cooling water channel 9, and a first spring 12 is arranged inside the lower mold demolding slide shaft 11.

[0032] In this embodiment, after the mold is opened, the lower mold demoulding slide shaft 11 can be moved upward by the pressure of cooling water, and the plastic part can be assisted in demoulding by the lower mold demoulding slide shaft 11, thereby reducing the ejector structure, reducing costs, and facilitating subsequent demoulding. The first spring 12 can be easily reset.

[0033] A lower die inlet 13 is provided on the side of the trash can forming lower die 1 , and the lower die inlet 13 is connected to the internal cooling water channel 9 .

[0034] In this embodiment, during cooling, cooling water enters the internal cooling water channel 9 from the lower mold inlet 13 .

[0035] Combination Figure 3 As shown, an upper mold elastic demoulding member 14 is provided in the trash can molding chamber 4 , and the upper mold elastic demoulding member 14 is located directly above the lower mold demoulding slide shaft 11 .

[0036] In this embodiment, after the mold is opened, the upper mold elastic demolding member 14 can be moved downward, and the plastic part can be demolded by the upper mold elastic demolding member 14 to prevent the plastic part from sticking to the trash can molding upper mold 2.

[0037] The upper mold elastic demoulding member 14 includes an upper mold demoulding slide shaft 15 arranged in the trash can molding chamber 4 , and a second spring 16 is arranged in the upper mold demoulding slide shaft 15 .

[0038] In this embodiment, after the mold is opened, the upper mold demoulding slide shaft 15 can be moved downward, and the plastic part can be demoulded by the upper mold demoulding slide shaft 15 to avoid adhesion of the plastic part to the trash can molding upper mold 2, and the second spring 16 is convenient for resetting.

[0039] The upper mold cooling part 7 includes a longitudinal cooling channel 17 and a plurality of transverse cooling channels 18 arranged in the trash can forming upper mold 2. The longitudinal cooling channel 17 and the plurality of transverse cooling channels 18 are arranged alternately with the trash can forming chamber 4 respectively.

[0040] In this embodiment, after the injection molding is completed, cooling water is introduced into the longitudinal cooling channel 17 and the plurality of transverse cooling channels 18 to cool the outer side of the plastic part.

[0041] Combination Figure 3 As shown, an upper die inlet 19 is further provided in the trash can forming upper die 2 , and the upper die inlet 19 is connected to the longitudinal cooling channel 17 .

[0042] In this embodiment, cooling water is introduced into the longitudinal cooling channel 17 through the upper die inlet 19 .

[0043] Combination Figure 1 , Figure 3 As shown, the transverse cooling channel 18 passes through the trash can forming upper mold 2, and the plurality of transverse cooling channels 18 are parallel to each other.

[0044] In this embodiment, the transverse cooling channel 18 passes through the trash can forming upper mold 2 to facilitate the inflow and outflow of water.

[0045] Combination Figure 1 , Figure 3 As shown, the injection molded flow diverter 6 includes an injection molded main board 20 and an injection molded tube 21 which are arranged above the trash can molding upper mold 2.

[0046] In this embodiment, during injection molding, the molten material is injected into the mold cavity through the injection molding main board 20 and the injection molding tube 21 .

[0047] The working principle of the utility model is:

[0048] During the injection molding process, the trash can molding lower mold 1 and the trash can molding upper mold 2 are brought close to each other, so that the trash can molding protrusion 3 and the trash can molding cavity 4 are abutted and matched to form a complete cavity, and the molten material is injected into the cavity through the injection molding main board 20 and the injection molding tube 21.

[0049] After injection molding is completed, cooling water enters the internal cooling water channel 9 from the lower mold inlet 13, and cools the inside of the plastic part through the internal cooling water channel 9. The cooling water is passed into the longitudinal cooling channel 17 and several transverse cooling channels 18 to cool the outside of the plastic part. The internal and external multi-channel cooling is adopted to achieve cooling balance of the plastic part, avoid expansion or concavity inside and outside, and improve the quality of the plastic part.

[0050] After the mold is opened, the lower mold demoulding slide shaft 11 can be moved upward by the pressure of cooling water, and the plastic part can be demoulded by the lower mold demoulding slide shaft 11, which reduces the ejector structure, reduces the cost, and facilitates subsequent demoulding. The first spring 12 can be easily reset. After the mold is opened, the upper mold demoulding slide shaft 15 can be moved downward, and the plastic part can be demoulded by the upper mold demoulding slide shaft 15 to avoid the plastic part from sticking to the trash can molding upper mold 2. The second spring 16 is convenient for resetting.

[0051] The cooling water is introduced into the longitudinal cooling channel 17 through the upper mold inlet 19, and the transverse cooling channel 18 passes through the trash can molding upper mold 2, so as to facilitate the water in and out.

[0052] 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 without departing from the spirit of the present invention.

[0053] Although this article uses more terms such as trash can molding lower mold 1, trash can molding upper mold 2, trash can molding protrusion 3, trash can molding chamber 4, protrusion positioning seat 5, injection molding diverter 6, upper mold cooling part 7, internal cooling balance cooling component 8, internal cooling water channel 9, lower mold elastic demoulding part 10, lower mold demoulding slide shaft 11, first spring 12, lower mold inlet 13, upper mold elastic demoulding part 14, upper mold demoulding slide shaft 15, second spring 16, longitudinal cooling channel 17, transverse cooling channel 18, upper mold inlet 19, injection molding main board 20, injection molding tube 21, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model, and interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A trash can mold with a balanced hot runner system, comprising a trash can molding lower mold (1) and a trash can molding upper mold (2), characterized in that: The trash can molding lower mold (1) is provided with two trash can molding protrusions (3) symmetrical along the center line of the trash can molding lower mold (1), and the trash can molding upper mold (2) is provided with two trash can molding chambers (4) symmetrical along the center line of the trash can molding upper mold (2). The trash can molding protrusions (3) correspond to the positions of the trash can molding chambers (4) and are matched in shape. A protrusion positioning card seat (5) is provided between the trash can molding lower mold (1) and the trash can molding upper mold (2), and the protrusion positioning card seat (5) is engaged with the trash can molding protrusions (3). An injection molding diverter (6) is provided above the trash can molding upper mold (2). The trash can molding upper mold (2) is provided with an upper mold cooling part (7) staggered with the trash can molding chambers (4). The trash can molding protrusions (3) are provided with an internal cooling and balancing cooling component (8), and the internal cooling and balancing cooling component (8) corresponds to the position of the upper mold cooling part (7).

2. The trash can mold with a balanced hot runner system according to claim 1, characterized in that: The internal cooling balanced cooling component (8) includes a plurality of internal cooling water channels (9) arranged in the trash can forming protrusion (3), and a lower mold elastic demolding member (10) is provided on the top of the internal cooling water channel (9). The lower mold elastic demolding member (10) is slidably matched with the trash can forming protrusion (3) and the top of the lower mold elastic demolding member (10) is flush with the trash can forming protrusion (3).

3. The trash can mold with a balanced hot runner system according to claim 2, characterized in that: The lower mold elastic demoulding member (10) comprises a lower mold demoulding slide shaft (11) arranged at the top of the internal cooling water channel (9), and a first spring (12) is arranged inside the lower mold demoulding slide shaft (11).

4. The trash can mold with a balanced hot runner system according to claim 3, characterized in that: A lower die inlet (13) is provided on the side of the trash can molding lower die (1), and the lower die inlet (13) is connected to an internal cooling water channel (9).

5. The trash can mold with a balanced hot runner system according to claim 4, characterized in that: An upper mold elastic demoulding member (14) is provided in the trash can molding chamber (4), and the upper mold elastic demoulding member (14) is located directly above the lower mold demoulding sliding shaft (11).

6. The trash can mold with a balanced hot runner system according to claim 5, characterized in that: The upper mold elastic demoulding member (14) comprises an upper mold demoulding slide shaft (15) arranged in the trash can molding chamber (4), and a second spring (16) is arranged in the upper mold demoulding slide shaft (15).

7. The trash can mold with a balanced hot runner system according to claim 6, characterized in that: The upper mold cooling portion (7) comprises a longitudinal cooling channel (17) and a plurality of transverse cooling channels (18) arranged in the trash can molding upper mold (2); the longitudinal cooling channel (17) and the plurality of transverse cooling channels (18) are respectively arranged in an alternating manner with the trash can molding chamber (4).

8. The trash can mold with a balanced hot runner system according to claim 7, characterized in that: An upper die inlet (19) is also provided in the trash can forming upper die (2), and the upper die inlet (19) is connected to the longitudinal cooling channel (17).

9. The trash can mold with a balanced hot runner system according to claim 8, characterized in that: The transverse cooling channel (18) passes through the trash can forming upper mold (2), and the plurality of transverse cooling channels (18) are parallel to each other.

10. The trash can mold with a balanced hot runner system according to claim 9, characterized in that: The injection molded flow diverter (6) comprises an injection molded main board (20) and an injection molded tube (21) arranged above the trash can molding upper mold (2).

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