Mold structure with colloid temperature control function

Abstract

The utility model discloses a mould structure with colloid temperature control, which comprises a first runner, a second runner and a cavity, one end of the first runner is connected with a nozzle of an injection molding machine, the other end of the first runner is communicated with the second runner, one end of the second runner is communicated with the cavity, and the second runner and the cavity are coaxially arranged; the heating device further comprises a first heating ring and a second heating ring, the first heating ring is arranged on the outer side of the first flow channel, and the second heating ring is arranged on the outer side of the second flow channel. By arranging the two-section type heat preservation structure, the temperature of the front section is adjusted according to the temperature of the injection nozzle, the temperature of the rear section is adjusted according to the temperature of molten colloid, the temperatures are kept balanced all the time, the heating temperatures of the two sections can be adjusted respectively and do not affect each other, and therefore the injection molding quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold structure with colloid temperature control. Background Art

[0002] Generally, the nozzle structure of PET needle valve mold adopts one-stage heating. The disadvantage of one-stage heating is that it is not easy to adjust the temperature of the flow channel. During the injection molding process, the valve needle always stays in the flow channel. The high-temperature molten colloid will produce a temperature difference when passing through the valve needle with a low surface temperature, resulting in a welding mark. However, there is only one heating ring on the nozzle seat for heating, and only one temperature can be adjusted. Under normal circumstances, the temperature on the nozzle seat is generally high in order to keep the molten colloid flowing from the high-temperature flow channel plate warm. In this process, the metal parts will easily expand due to excessive temperature, causing the insulation sleeve to crack and the nozzle to deform, causing the front section to easily store cold glue, resulting in yellowing or whitening of the product, or when the molten colloid is injected into the cavity, it is easy to store cold glue. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide a mold structure with colloid temperature control to solve the defect that the temperature requirement of the one-stage nozzle structure is low in the front section and high in the rear section and cannot be separated to adjust the temperature, resulting in the nozzle in contact with the front section being easily cracked due to excessively high temperature, causing the insulation sleeve to crack and the nozzle to deform, thereby causing cold glue to be stored in the front section, resulting in yellowing or whitening of the product.

[0004] In order to achieve the purpose of the utility model, the following technical solutions are provided:

[0005] A mold structure with colloid temperature control, comprising a first flow channel, a second flow channel and a cavity, wherein one end of the first flow channel is connected to a nozzle of an injection molding machine, and the other end is connected to the second flow channel, one end of the second flow channel is connected to the cavity, and the second flow channel and the cavity are coaxially arranged;

[0006] It also includes a first heating coil and a second heating coil, wherein the first heating coil is arranged outside the first flow channel, and the second heating coil is arranged outside the second flow channel.

[0007] Furthermore, the temperature of the first heating coil is higher than the temperature of the second heating coil.

[0008] Furthermore, it includes a glue nozzle, a flow channel plate, a nozzle seat and an injection nozzle which are arranged in sequence, the first flow channel is formed in the glue nozzle, the flow channel plate and the nozzle seat, the second flow channel is formed in the nozzle seat and the injection nozzle, the first heating coil is arranged on the outside of the nozzle seat, and the second heating coil is arranged on the outside of the injection nozzle.

[0009] Furthermore, it also includes a slideway, the slideway is formed in the glue nozzle, the flow channel plate and the nozzle seat, the slideway is connected to the second flow channel, and the slideway and the second flow channel are coaxially arranged;

[0010] It also includes a valve needle, which is slidably arranged on the slideway.

[0011] Furthermore, a connection point between the first flow channel and the second flow channel is located on the nozzle seat.

[0012] Furthermore, it also includes a reducing elbow, which is arranged between the flow channel plate and the nozzle seat.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The second heating coil is adjusted according to the temperature of the nozzle to avoid deformation of the nozzle due to expansion due to excessive temperature; the first heating coil is to ensure the temperature of the molten colloid during the flow process of the first flow channel. By setting a two-stage insulation structure, the temperature of the front section is adjusted according to the temperature of the nozzle, and the temperature of the rear section is adjusted according to the temperature of the molten colloid, so that the temperature is always kept balanced. The two-stage heating temperatures can be adjusted separately without affecting each other, so as to ensure the quality of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the mold structure in the utility model (when the valve needle cuts the rubber);

[0017] Figure 2 It is a schematic diagram of the mold structure in the utility model (when the valve needle is withdrawn);

[0018] Figure 3 This utility model Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 It is a schematic diagram of a traditional mold;

[0020] Explanation of the accompanying drawings: 101 - first flow channel; 102 - second flow channel; 103 - cavity; 11 - first heating coil; 12 - second heating coil; 13 - glue nozzle; 14 - flow channel plate; 15 - nozzle seat; 16 - injection nozzle; 17 - valve needle; 18 - reducing elbow. DETAILED DESCRIPTION

[0021] In order to facilitate a better understanding of the purpose, structure, features and efficacy of the utility model, the utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the figures are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] like Figure 1-3 As shown, this embodiment provides a mold structure with colloid temperature control, which includes a first flow channel 101, a second flow channel 102 and a cavity 103. One end of the first flow channel 101 is connected to the nozzle of the injection molding machine, and the other end is connected to the second flow channel 102. One end of the second flow channel 102 is connected to the cavity 103, and the second flow channel 102 and the cavity 103 are coaxially arranged. Driven by the injection molding machine, the molten colloid passes through the first flow channel 101 and the second flow channel 102 in sequence, and finally enters the cavity 103 to realize injection molding.

[0024] The structure also includes a first heating coil 11 and a second heating coil 12. The first heating coil 11 is arranged outside the first flow channel 101, and the first heating coil 11 is used to keep the molten colloid in the first flow channel 101 warm; the second heating coil 12 is arranged outside the second flow channel 102, and the second flow channel 102 is used to keep the molten colloid in the second flow channel 102 warm.

[0025] The second heating coil 12 is adjusted according to the temperature of the nozzle 16 to avoid deformation of the nozzle 16 due to expansion due to excessive temperature; the first heating coil 11 is to ensure the temperature of the molten colloid during the flow process of the first flow channel 101. By setting a two-stage insulation structure, the temperature of the front section is adjusted according to the temperature of the nozzle 16, and the temperature of the rear section is adjusted according to the temperature of the molten colloid, so that the temperature is always kept balanced, and the two-stage heating temperatures can be adjusted separately without affecting each other, so as to ensure the quality of injection molding.

[0026] Preferably, the temperature of the first heating coil 11 is higher than the temperature of the second heating coil 12 .

[0027] Specifically, the structure includes: a glue nozzle 13, a flow channel plate 14, a nozzle seat 15 and an injection nozzle 16 arranged in sequence, the first flow channel 101 is formed in the glue nozzle 13, the flow channel plate 14 and the nozzle seat 15, the second flow channel 102 is formed in the nozzle seat 15 and the injection nozzle 16, the first heating coil 11 is arranged on the outside of the nozzle seat 15, and the second heating coil 12 is arranged on the outside of the injection nozzle 16.

[0028] like Figure 4 As shown, the conventional injection mold includes a valve needle 17, a nozzle 16, a nozzle seat 15, a heating coil, and a flow channel plate 14. The path of the conventional flow channel turns at the intersection of the flow channel plate 14 and the axis of the cavity 103, and then extends along the axis of the cavity 103 to connect with the cavity 103; after the valve needle 17 cuts off the molten colloid, the valve needle 17 stays in the flow channel. The high-temperature molten colloid will produce a temperature difference when passing through the valve needle 17 with a low surface temperature, thereby forming a welding mark, which is particularly obvious in the production of high-proportion mixed-color bottle embryos or high-end daily chemical bottle embryos. For example, obvious different-color lines appear on the milky white embryos.

[0029] like Figure 2-3 As shown, as a preferred solution, the structure also includes a slide, which is formed in the glue nozzle 13, the flow channel plate 14 and the nozzle seat 15, and the slide is connected to the second flow channel 102, and the slide and the second flow channel 102 are coaxially arranged; it also includes a valve needle 17, and the valve needle 17 is slidably arranged on the slide, and the valve needle 17 is used to cut off the molten colloid between the second flow channel 102 and the cavity 103.

[0030] Furthermore, the connection point between the first flow channel 101 and the second flow channel 102 is located on the nozzle seat 15, so that the axial length of the second flow channel 102 is shortened, and when the valve needle 17 cuts off the molten colloid, it can completely withdraw from the second flow channel 102. In this way, during the injection process, the molten colloid avoids the valve needle 17, ensuring that the temperature of the molten colloid does not change, thereby avoiding welding marks caused by temperature differences.

[0031] Specifically, the structure further includes a reducing elbow 18, which is disposed between the flow channel plate 14 and the nozzle seat 15. After the first flow channel 101 enters the reducing elbow 18 from the flow channel plate 14, its path turns and enters the nozzle seat 15, and then communicates with the second flow channel 102, so that the second flow channel 102 does not need to extend to the flow channel plate 14, so that the axial length of the second flow channel 102 is shortened, and the valve needle 17 can completely withdraw from the second flow channel 102 under the same stroke, avoiding welding marks caused by contact with the molten colloid.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mold structure with colloid temperature control, characterized in that: The mold cavity (103) comprises a first flow channel (101), a second flow channel (102) and a mold cavity (103); one end of the first flow channel (101) is connected to a nozzle of an injection molding machine, and the other end is connected to the second flow channel (102); one end of the second flow channel (102) is connected to the mold cavity (103); and the second flow channel (102) and the mold cavity (103) are coaxially arranged; It also comprises a first heating coil (11) and a second heating coil (12), wherein the first heating coil (11) is arranged outside the first flow channel (101), and the second heating coil (12) is arranged outside the second flow channel (102).

2. The mold structure with colloid temperature control according to claim 1, characterized in that: The temperature of the first heating coil (11) is higher than the temperature of the second heating coil (12).

3. The mold structure with colloid temperature control according to claim 1, characterized in that: The invention comprises a glue nozzle (13), a flow channel plate (14), a nozzle seat (15) and an injection nozzle (16) which are arranged in sequence, wherein the first flow channel (101) is formed in the glue nozzle (13), the flow channel plate (14) and the nozzle seat (15), the second flow channel (102) is formed in the nozzle seat (15) and the injection nozzle (16), the first heating coil (11) is arranged on the outside of the nozzle seat (15), and the second heating coil (12) is arranged on the outside of the injection nozzle (16).

4. The mold structure with colloid temperature control according to claim 3, characterized in that: It also includes a slideway, the slideway is formed in the glue nozzle (13), the flow channel plate (14) and the nozzle seat (15), the slideway is connected to the second flow channel (102), and the slideway and the second flow channel (102) are coaxially arranged; It also comprises a valve needle (17), wherein the valve needle (17) is slidably arranged on the slideway.

5. The mold structure with colloid temperature control according to claim 4, characterized in that: The connection point between the first flow channel (101) and the second flow channel (102) is located on the nozzle seat (15).

6. The mold structure with colloid temperature control according to claim 5, characterized in that: It also includes a reducing elbow (18), which is arranged between the flow channel plate (14) and the nozzle seat (15).

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