Injection molding components and needle valve hot runner systems

Abstract

The present invention discloses an injection molding component and a needle valve hot runner system. In the present application, a heat insulating cap limits a first annular groove arranged around the injection port, and the first end portion is arranged in the first annular groove. The first end portion is fitted with the side wall of the spacer away from the injection port to isolate the first annular cavity from the injection channel, and the injection channel is connected to the injection port. During injection molding, the molten glue flows into the injection channel away from the injection port and flows to the injection port through the injection channel. Along the first direction, the heat insulating cap is spaced apart from the first end portion. When the thickness of the front template is too large, in order to avoid the injection molding component from colliding with the mold and being damaged, the heat insulating cap can move from the side close to the mold to the side away from the mold to eliminate the extrusion between the injection molding component and the mold. When the thickness of the front template is too small, in order to avoid a gap for glue storage between the injection molding component and the mold, the heat insulating cap can move toward the side close to the mold to eliminate the gap for glue storage. The present application can effectively eliminate the hot runner injection molding problems caused by the thickness error of the front template.

Description

Technical Field

[0001] The present invention relates to the technical field of hot runner injection molds, and in particular to an injection molding component and a needle valve hot runner system. Background Art

[0002] In the hot runner injection molding process, flip-chip molds are often used. Due to the special structure or appearance requirements of the finished product, the injection and ejection of the product are both located on the same side of the finished product. Compared to conventional molds, the ejection of the product in flip-chip molds is on the movable mold side, and the hot runner is installed on the mold core side. The needle valve passes through the ejector plate and core plate, and the glue is injected from the mold core side. Therefore, the thickness of the flip-chip mold is generally greater than that of the upright mold. In addition, the front mold plate of most flip-chip molds is composed of multiple stacked mold plates. Each mold plate has certain manufacturing errors and deformation, making it difficult to accurately control the thickness of the front mold after assembly. The needle valve hot runner system is a key component within the mold, generally installed in the mold front plate. The thickness error of the front plate directly affects the installation accuracy of the needle valve hot runner system. Excessive front plate thickness error can even affect the use of the needle valve hot runner system. In existing technologies, the injection port of the needle valve hot runner system is formed by a fixed component and cannot adapt to changes in the thickness of the front plate. If the thickness of the front template is too large, the glue outlet of the hot runner system may be too close to the mold, causing the hot runner system to press against the mold, thereby causing damage to the hot runner system accessories. If the thickness of the front template is too small, there may be a gap between the glue outlet and the mold, and the molten glue may be hidden in the gap during injection molding, thereby causing the injection molded product to have different colors. Summary of the Invention

[0003] The main purpose of the present invention is to provide an injection molding component that can eliminate the hot runner injection molding problem caused by the thickness error of the front template.

[0004] To achieve the above-mentioned purpose, the present invention proposes an injection molding component, which includes a first end and a heat insulation cap. The first end limits an injection molding channel extending along a first direction. The heat insulation cap includes a spacer and a cap body, both of which are arranged around a first axis. The spacer is arranged on the inner side of the cap body, and the spacer limits the injection molding port around the first axis. The spacer is connected to the cap body on the side away from the injection molding port, and together with the cap body, limits a first annular cavity arranged around the injection molding port. The first end is arranged in the first annular cavity, and the first end is in contact with the side wall of the spacer away from the injection molding port to isolate the first annular cavity from the injection molding channel, and the injection molding channel is connected to the injection molding port. The first end is spaced apart from the bottom wall of the first annular cavity so that the heat insulation cap can move relative to the first end along the first direction. Wherein, the first direction is parallel to the first axis.

[0005] In some embodiments, the first end portion has a first inner circumferential wall near one end of the thermal insulation cap, the first inner circumferential wall is parallel to the first axis, the partition portion has a second inner circumferential wall on the side away from the injection port, the second inner circumferential wall is parallel to the first axis, and the first inner circumferential wall is used to abut against the second inner circumferential wall.

[0006] In some embodiments, along a direction parallel to the first axis and pointing from the injection channel to the injection port, the inner enclosed area of ​​the first end portion gradually decreases.

[0007] In some embodiments, along a direction parallel to the first axis and pointing from the injection channel to the injection port, the inner enclosed area of ​​the partition gradually decreases.

[0008] In some embodiments, along a direction parallel to the first axis and pointing from the injection channel to the injection port, the inner enclosed area of ​​the first end portion gradually decreases, and the inner enclosed area of ​​the spacer portion gradually decreases, wherein the minimum enclosed area of ​​the first end portion is equal to the maximum enclosed area of ​​the spacer portion.

[0009] In some embodiments, the injection molding assembly further includes a hot nozzle jacket connected to an end of the thermal insulation cap away from the injection port, and the hot nozzle jacket is used to drive the thermal insulation cap to move in a direction parallel to the first axis.

[0010] In some embodiments, the movement distance d of the heat insulation cap along the direction parallel to the first axis satisfies: 0.3 mm≤d≤2 mm.

[0011] In some embodiments, the injection molding assembly further comprises a nozzle, which is arranged around the first axis on the side of the first end away from the injection channel, and the hot nozzle jacket is connected to the side of the nozzle away from the first end, and the hot nozzle jacket can move relative to the nozzle in a direction parallel to the first axis.

[0012] In some embodiments, a first groove is limited on one side of the nozzle head close to the nozzle housing, and the nozzle housing has a first clamping portion, which is disposed in the first groove and can move in the first groove in a direction parallel to the first axis.

[0013] In some embodiments, a second groove is provided at one end of the nozzle housing close to the heat insulation cap, and an end of the heat insulation cap away from the injection port is provided at the second groove.

[0014] The second aspect of the present application further proposes a needle valve hot runner system, which includes the injection molding component, the valve needle and the positioning part of any one of the above embodiments.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present application, the thermal insulation cap limits a first annular groove arranged around the injection port, and the first end portion is inserted into the first annular groove from the side of the first annular groove away from the injection port. The first end portion fits with the side wall of the spacer away from the injection port, thereby isolating the first annular cavity from the injection channel, and at the same time connecting the injection channel with the injection port. During injection molding, the molten glue flows into the injection channel away from the injection port and flows to the injection port through the injection channel. The molten glue flows to the first end portion and the thermal insulation cap. Since the first end portion fits with the side wall of the spacer away from the injection port, the molten glue will not enter the first annular cavity when flowing from the injection channel of the first end portion to the injection port of the thermal insulation cap, but will directly flow out of the injection port. Since the thermal insulation cap is spaced apart from the first end portion, when the thickness of the front template is too large, in order to prevent the injection port of the injection molding component from being too close to the mold, and to prevent the injection molding component from colliding with the mold and damaging the injection molding component, the thermal insulation cap can move from the side close to the mold to the side away from the mold, that is, the thermal insulation cap can move in the direction of reducing the distance between the bottom wall of the thermal insulation cap and the first end portion, until the thermal insulation cap does not conflict with the mold, and no glue gap is generated between the thermal insulation cap and the mold. Similarly, if the thickness of the front template is too small, in order to avoid a glue gap between the injection molding component and the mold, the thermal insulation cap can move to the side close to the mold to eliminate the glue gap. The technical solution of the present application can effectively eliminate the hot runner injection molding problem caused by the thickness error of the front template. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic cross-sectional view of a partial structure of a needle valve hot runner system in one embodiment of the present invention;

[0019] Figure 2 for Figure 1 A local enlarged schematic diagram of point I;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of a heat insulation cap in one embodiment of the present invention;

[0021] Figure 4 For the present invention Figure 3 A schematic cross-sectional view of a heat insulating cap in an embodiment;

[0022] Figure 5 Schematic diagram of the exploded structure of the injection molding component in one embodiment of the present invention.

[0023] Description of Figure Numbers:

[0024] Injection molding component 100;

[0025] First end portion 110; injection channel 111; first inner peripheral wall 112;

[0026] Heat insulation cap 120; first axis 121; spacer 122; second inner peripheral wall 1221; cap body 123; injection port 124; first annular cavity 125;

[0027] Hot nozzle housing 130; first clamping portion 131; second groove 132;

[0028] Nozzle 140; first groove 141;

[0029] Needle valve hot runner system 200;

[0030] Valve needle 210;

[0031] Positioning portion 220;

[0032] Front template 300;

[0033] First direction X;

[0034] Move distance d.

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] A flip-chip mold is a mold type in which the glue inlet and ejection are both on the same side of the finished product. Compared with general upright molds, flip-chip molds are generally thicker. This is mainly because the front templates of most flip-chip molds are made up of multiple templates stacked on top of each other. During the production of the front template, each template will have certain errors and deformations. This makes it difficult to accurately control the thickness of the front template after assembly. The needle valve hot runner system is a key component of mold forming and is generally installed in the front template of the mold. On the one hand, the thickness error of the front template may cause the glue outlet of the hot runner system to be too close to the mold, causing the hot runner system and the mold to collide, thereby causing damage to the hot runner system accessories. On the other hand, it may also leave a gap between the glue outlet and the mold. During injection molding, the molten glue is hidden in this gap, which in turn causes the injection molded product to have different colors.

[0038] To solve the above problems, Figures 1 to 5 As shown, the present application proposes an injection molding component 100 , which includes a first end portion 110 and a heat insulation cap 120 .

[0039] like Figure 2 As shown, the first end portion 110 defines an injection channel 111 extending along the first direction X. In the injection molding assembly 100 , the structure defining the injection channel 111 is generally referred to as a nozzle. It is understood that the first end portion 110 is the end of the nozzle close to the dispensing port.

[0040] like Figure 3 as well as Figure 4 As shown, the thermal insulation cap 120 includes a spacer 122 and a cap body 123, both of which are arranged around the first axis 121. The spacer 122 is arranged on the inner side of the cap body 123, and the spacer 122 surrounds the first axis 121 to limit the injection port 124. The spacer 122 is connected to the cap body 123 on the side away from the injection port 124, and together with the cap body 123, limits the first annular cavity 125 arranged around the injection port 124. In the technical solution of the present application, the spacer 122 is arranged on the inner layer of the thermal insulation cap 120 around the first axis 121 and limits the injection port 124. The cap body 123 is arranged on the outside of the spacer 122 around the first axis 121, and the cap body 123 and the spacer 122 together limit the first annular cavity 125 with an opening on one side. It can be understood that in some embodiments, the cap body 123 and the cap body 123 cannot be formed in an integral manner to form the thermal insulation cap 120.

[0041] like Figure 2 as well as Figure 4 As shown, to facilitate positioning the first end portion 110 within the first annular cavity 125, an opening may be provided on the side of the first annular cavity 125 facing away from the injection port 124. The wall surface of the first annular cavity 125 facing away from the opening serves as the bottom wall of the first annular cavity 125 formed by the heat insulating cap 120. In other words, the bottom wall is provided on the side of the partition portion facing away from the injection port 124. The first end portion 110 abuts against the side wall of the partition portion 122 facing away from the injection port 124, thereby isolating the first annular cavity 125 from the injection channel 111 and maintaining communication between the injection channel 111 and the injection port 124. During injection molding, the molten plastic flows into the injection channel 111 from the end away from the injection port 124. Since the injection channel 111 is connected to the injection port 124, the molten plastic can flow toward the injection port 124 through the injection channel 111. When the molten plastic flows toward the injection port 124, the first end portion 110 abuts against the side wall of the partition portion 122 away from the injection port 124. Therefore, when the molten plastic flows through the junction between the first end portion 110 and the injection port 124, it does not enter the first annular cavity 125, but flows out directly from the injection port 124.

[0042] In which, the first direction X is parallel to the first axis 121, and the first end 110 is spaced apart from the bottom wall forming the first annular cavity 125 so that the thermal insulation cap 120 can move relative to the first end 110 along the first direction X. That is, the thermal insulation cap 120 has a first state and a second state relative to the first end 110, and in the first state, the first end 110 is spaced apart from the bottom wall forming the first annular cavity 125 of the thermal insulation cap 120. In the second state, the first end 110 abuts against the bottom wall forming the first annular cavity 125 of the thermal insulation cap 120. The thermal insulation cap 120 is configured to be able to switch between the first state and the second state under the action of an external force. It can be understood that in different embodiments, the distance between the bottom wall and the first end 110 may also be different depending on the distance between the injection port 124 and the mold. It can be understood that the thermal insulation cap 120 can move along the first direction X relative to the first end 110, which means that the thermal insulation cap 120 can eventually switch directly between the first state and the second state. The actual contact surface between the specific thermal insulation cap 120 and the first end 110 can be parallel to the first direction X, or have a certain inclination angle with the first direction X. The setting of the contact surface between the thermal insulation cap 120 and the first end 110 and the specific switching method are not limited here.

[0043] In the present application, the thermal insulation cap 120 defines a first annular groove surrounding the injection port 124, and the first end portion 110 is inserted into the first annular groove on the side of the first annular groove away from the injection port 124. The first end portion 110 is in contact with the side wall of the spacer 122 away from the injection port 124, thereby isolating the first annular cavity 125 from the injection channel 111 while connecting the injection channel 111 to the injection port 124. During injection molding, the molten plastic flows into the injection channel 111 away from the injection port 124 and flows toward the injection port 124 through the injection channel 111. The molten plastic flows to the first end portion 110 and the thermal insulation cap 120. Since the first end portion 110 is in contact with the side wall of the spacer 122 away from the injection port 124, the molten plastic does not enter the first annular cavity 125 when flowing from the injection channel 111 of the first end portion 110 to the injection port 124 of the thermal insulation cap 120, but flows directly out of the injection port 124. Since the thermal insulation cap 120 is spaced apart from the first end 110, when the thickness of the front template 300 is too large, in order to prevent the injection port 124 of the injection molding component 100 from being too close to the mold, and to prevent the injection molding component 100 from colliding with the mold and damaging the injection molding component 100, the thermal insulation cap 120 can move from the side close to the mold to the side away from the mold, that is, the thermal insulation cap 120 can move in the direction of reducing the distance between the bottom wall of the thermal insulation cap 120 and the first end 110, until the thermal insulation cap 120 does not interfere with the mold, and no glue gap is generated between the thermal insulation cap 120 and the mold. Similarly, if the thickness of the front template 300 is too small, in order to avoid leaving a glue gap between the injection molding component 100 and the mold, the thermal insulation cap 120 can move to the side close to the mold to eliminate the glue gap. The technical solution of the present application can effectively eliminate the hot runner injection molding problem caused by the thickness error of the front template 300.

[0044] In some embodiments, in order to achieve relative movement of the heat insulating cap 120 relative to the first end portion 110, the contact surface between the first end portion 110 and the heat insulating cap 120 may be configured differently according to different injection molding requirements. Figure 2As shown, the first end portion 110 is provided with a first inner circumferential wall 112 that abuts the thermal insulation cap 120, and the thermal insulation cap 120 is provided with a second inner circumferential wall 1221 that abuts the first end portion 110. In different embodiments, the first inner circumferential wall 112 and the second inner circumferential wall 1221 can be parallel to the first axis 121 or can have a certain angle with the first axis 121. Specifically, in this embodiment, the first end portion 110 has a first inner circumferential wall 112 on the end closest to the thermal insulation cap 120, and the first inner circumferential wall 112 is parallel to the first axis 121. The spacer 122 has a second inner circumferential wall 1221 on the side away from the injection port 124, and the second inner circumferential wall 1221 is parallel to the first axis 121. The first inner circumferential wall 112 is configured to abut the second inner circumferential wall 1221. In other words, in this embodiment, the second inner circumferential wall 1221 moves relative to the first inner circumferential wall 112 along the first direction X, thereby enabling the thermal insulation cap 120 to move relative to the first end portion 110 along the first direction X.

[0045] In some embodiments, to improve the fluidity of the injection melt, the cross section of the injection channel 111 limited by the contact end of the first end 110 and the heat insulation cap 120 can be equal to the cross section of the heat insulation cap 120 near the first end 110. Figure 2 As shown, in this embodiment, along a direction parallel to the first axis 121 and pointing from the injection channel 111 to the injection port 124, the inner enclosed areas of the first end portion 110 and the spacer portion 122 gradually decrease, wherein the minimum enclosed area of ​​the first end portion 110 is equal to the maximum enclosed area of ​​the spacer portion 122. As the molten plastic flows from the injection channel 111 to the injection port 124, the enclosed area of ​​the first end portion 110 gradually decreases as it approaches the injection port 124 along the first direction X, and the enclosed area of ​​the spacer portion 122 also gradually decreases. At the junction of the injection channel 111 and the injection port 124, the enclosed area of ​​the first end portion 110 is equal to the enclosed area of ​​the spacer portion 122, thereby allowing the molten plastic to flow more smoothly from the wall surface of the first end portion 110 to the wall surface of the thermal insulation cap 120. That is to say, in some embodiments, the first end portion 110 may have a third inner circumferential wall on the end away from the thermal insulation cap 120, and the thermal insulation cap 120 may have a fourth inner circumferential wall on the side close to the injection port 124. The third inner circumferential wall directly has a first angle α with the first axis 121, and the fourth inner circumferential wall has a second angle β with the first axis 121. The first angle α is equal to the second angle β.

[0046] like Figure 1As shown, in some embodiments, to enhance the mobility of the thermal insulation cap 120 relative to the first end 110, the injection molding assembly 100 may further include a nozzle housing 130, which is configured to drive the movement of the thermal insulation cap 120. It will be appreciated that the thermal insulation cap 120 is disposed around the first end 110, with one end of the thermal insulation cap 120 defining an injection port 124 and a first annular cavity 125, and the other end being located on the side of the first end 110 away from the injection port 124. To enable movement of the thermal insulation cap 120 relative to the first end 110, the end of the thermal insulation cap 120 away from the injection port 124 may be connected to any suitable component capable of moving relative to the first end 110 under the action of an external force. In this embodiment, the injection molding assembly 100 further includes a nozzle housing 130, which is connected to the end of the thermal insulation cap 120 away from the injection port 124 and is configured to drive the thermal insulation cap 120 to move in a direction parallel to the first axis 121.

[0047] In some embodiments, the moving distance d of the heat insulating cap 120 relative to the first end portion 110 may be different according to the thickness error of the front template 300. Figure 2 As shown, specifically, the thickness error value of the front template 300 may be 0.3mm, that is, the thickness of the front template 300 exceeds the expected value by 0.3mm. In this embodiment, the movement distance d of the thermal insulation cap 120 in the direction parallel to the first axis 121 satisfies: 0.3mm≤d≤2mm. Specifically, the distance that the thermal insulation cap 120 can move in the direction parallel to the first axis 121 can be 0.3mm, 0.5mm, 1.2mm or 2mm. At this time, the thermal insulation cap 120 can move away from the mold side along the first direction X to eliminate the extrusion between the injection molding component 100 and the mold, and will not cause a large gap to form between the thermal insulation cap 120 and the mold to cause glue to be hidden, thereby causing injection molding discoloration.

[0048] In some embodiments, in order to increase the service life of the first end portion 110 and reduce the risk of damage to the first end portion 110, the injection molding component 100 may further include a nozzle 140, such as Figure 1 As shown, the nozzle 140 is arranged around the first end 110. Figure 1As shown, in this embodiment, the injection molding assembly 100 further includes a nozzle 140, which is disposed about the first axis 121 on a side of the first end portion 110 facing away from the injection channel 111. The hot nozzle housing 130 is connected to the side of the nozzle 140 facing away from the first end portion 110. The hot nozzle housing 130 is movable relative to the nozzle 140 in a direction parallel to the first axis 121. It will be appreciated that the injection molding assembly 100 includes the nozzle 140 disposed about the first end portion 110. In some embodiments, along the first direction X, the end of the thermal insulation cap 120 distal from the injection port 124 may be spaced apart from the nozzle 140, so that the thermal insulation cap 120 as a whole can move along the first direction X. The provision of the nozzle 140 isolates the first end portion 110 from other injection molding components, thereby effectively improving the stability of the injection molding process of the first end portion 110.

[0049] In some embodiments, in order to facilitate the movement of the nozzle cover 130 driving the heat insulating cap 120, the nozzle head 140 may be provided with a connection portion with the nozzle cover 130 to improve the movement stability of the nozzle cover 130 driving the heat insulating cap 120. Figure 2 As shown, in this embodiment, the nozzle head 140 defines a first groove 141 on a side adjacent to the nozzle housing 130. The nozzle housing 130 includes a first engaging portion 131 disposed in the first groove 141. The first engaging portion 131 is movable within the first groove 141 in a direction parallel to the first axis 121. It is understood that in some embodiments, the nozzle housing 130 may also include a groove, and the nozzle head 140 may also include a engaging portion that cooperates with the groove. This is not a limitation herein.

[0050] In some embodiments, in order to facilitate the nozzle housing 130 to drive the heat insulating cap 120 to move, the heat insulating cap 120 can be connected to the nozzle housing 130 in different ways. Figure 2 As shown, in this embodiment, the end of the nozzle housing 130 close to the thermal insulation cap 120 is provided with a second groove 132, and the end of the thermal insulation cap 120 away from the injection port 124 is provided with the second groove 132. When the thickness of the front template 300 is greater than the allowable range, the nozzle housing 130 drives the thermal insulation cap 120 to retract toward the side away from the mold. When the thickness of the front template 300 is less than the allowable range, the nozzle housing 130 pushes the thermal insulation cap 120 to move toward the side close to the mold. It is understandable that in different embodiments, the thermal insulation cap 120 can be connected to the nozzle housing 130 in different ways. Specifically, the thermal insulation cap 120 can be connected to the nozzle housing 130 by a card slot. The thermal insulation cap 120 can also be connected to the nozzle housing 130 by any suitable method such as welding or integral molding, which is not limited here.

[0051] like Figure 1As shown, the second aspect of the present application further provides a needle valve hot runner system 200, which includes the injection molding assembly 100, the valve needle 210 and the positioning portion 220 of any of the above-mentioned embodiments. The valve needle 210 is inserted into the injection molding channel 111, and the positioning portion 220 is used to keep the valve needle 210 and the injection port 124 coaxially arranged. The valve needle 210 is inserted into the injection molding channel 111, and the setting of the positioning portion 220 can enhance the coaxiality of the valve needle 210 and the injection port 124, thereby making the valve needle 210 more precise in controlling the glue discharge and sealing of the hot runner system. It is understandable that the needle valve hot runner system 200 can also have a heater, a water transport tank and a valve needle 210 drive device, etc., which will not be repeated here. It is understandable that thanks to the improvement of the above-mentioned injection molding assembly 100, the needle valve hot runner system 200 of this embodiment has the same technical effect as the above-mentioned injection molding assembly 100, which will not be repeated here.

[0052] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0053] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. An injection molding component, characterized in that: include: a first end portion, wherein the first end portion defines an injection channel extending along a first direction; A heat-insulating cap, comprising a spacer and a cap body, both of which are arranged around a first axis, the spacer being arranged inside the cap body, the spacer limiting an injection port around the first axis, the spacer being connected to the cap body on a side facing away from the injection port, and together with the cap body limiting a first annular cavity arranged around the injection port, the first end being arranged in the first annular cavity, the first end being in contact with a side wall of the spacer away from the injection port so as to isolate the first annular cavity from the injection channel, and the injection channel being connected to the injection port, the first end being spaced from a bottom wall forming the first annular cavity so as to enable the heat-insulating cap to move relative to the first end along the first direction; Wherein, the first direction is parallel to the first axis.

2. The injection molding component according to claim 1, characterized in that The first end portion has a first inner circumferential wall near one end of the thermal insulation cap, and the first inner circumferential wall is parallel to the first axis. The partition portion has a second inner circumferential wall on the side away from the injection port, and the second inner circumferential wall is parallel to the first axis. The first inner circumferential wall is used to abut against the second inner circumferential wall.

3. The injection molding component according to claim 1, characterized in that Along a direction parallel to the first axis and pointing from the injection channel to the injection port, the inner enclosed area of ​​the first end portion gradually decreases; and / or, Along a direction parallel to the first axis and pointing from the injection channel to the injection port, the inner enclosed area of ​​the partition portion gradually decreases.

4. The injection molding component according to claim 3, characterized in that Along the direction parallel to the first axis and pointing from the injection channel to the injection port, the inner enclosed area of ​​the first end portion gradually decreases, and the inner enclosed area of ​​the spacer portion gradually decreases, wherein the minimum enclosed area of ​​the first end portion is equal to the maximum enclosed area of ​​the spacer portion.

5. The injection molding component according to claim 1, characterized in that The injection molding assembly further includes a hot nozzle jacket connected to an end of the thermal insulation cap away from the injection port, and the hot nozzle jacket is used to drive the thermal insulation cap to move in a direction parallel to the first axis.

6. The injection molding component according to claim 5, characterized in that A moving distance d of the heat insulation cap in a direction parallel to the first axis satisfies the following: 0.3 mm ≤ d ≤ 2 mm.

7. The injection molding component according to claim 5, characterized in that The injection molding assembly also includes a nozzle, which is arranged around the first axis on the side of the first end away from the injection molding channel. The hot nozzle jacket is connected to the side of the nozzle away from the first end, and the hot nozzle jacket can move relative to the nozzle in a direction parallel to the first axis.

8. The injection molding component according to claim 7, characterized in that The nozzle head is limited to form a first groove on one side close to the nozzle housing. The nozzle housing has a first clamping portion, which is arranged in the first groove and can move in the first groove along a direction parallel to the first axis.

9. The injection molding component according to claim 5, characterized in that The end of the nozzle housing close to the heat insulation cap is provided with a second groove, and the end of the heat insulation cap away from the injection port is provided in the second groove.

10. A needle valve hot runner system, characterized in that: include: The injection molded component according to any one of claims 1 to 9; a valve needle, the valve needle being inserted into the injection channel; as well as, A positioning portion is used to keep the valve needle and the injection port coaxially arranged.

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