An injection mold with a built-in sprue sleeve

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold with a built-in sprue sleeve, comprising: a cavity template, on which a flow channel is provided; an upper template, which is located above the cavity template and comprises a first template, a second template, and a receiving groove that sequentially penetrates the first template and the second template and is connected to the flow channel; a connecting sleeve, which is detachably arranged in the receiving groove and extends along the length direction of the receiving groove, and a sprue sleeve connected to the flow channel is provided in the connecting sleeve, wherein the straight-line distance between the sprue sleeve and the flow channel is smaller than the straight-line distance between the first template and the flow channel. The utility model provides an injection mold with a built-in sprue sleeve, which has a simple structure, is easy to assemble, and can effectively shorten the injection flow channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and in particular relates to an injection mold with a built-in sprue sleeve. Background Art

[0002] The sprue bushing, also known as the nozzle or the filling nozzle, is a key component that connects the injection molding machine nozzle to the internal flow channel of the mold, and is responsible for guiding the molten plastic material into the mold. As a bridge between the molding mold and the injection molding machine, the sprue bushing is usually a metal accessory. In the traditional injection molding process, the sprue bushing is mostly installed on the fixed mold plate. However, this layout often leads to a long injection flow channel, especially when a runner separation plate is added to the mold design. The problem is more prominent. Such design deficiencies not only slow down the injection rate of the plastic melt, but also increase the heat loss due to the long injection flow channel, causing the material to start cooling and may partially solidify before reaching the molding area, which not only damages the quality of the finished product, but also significantly increases the loss of raw materials. And the remaining excess materials that have to be treated as waste further increase production costs and environmental impact. Utility Model Content

[0003] The utility model aims to solve the above problems in the prior art and to provide an injection mold with a built-in sprue sleeve which can effectively shorten the injection flow channel and has a simple structure and is easy to assemble.

[0004] The purpose of the utility model can be achieved through the following technical solutions, an injection mold with a built-in sprue sleeve, comprising:

[0005] A cavity template, wherein a flow channel is provided on the cavity template;

[0006] An upper template, the upper template is located above the cavity template, and includes a first template, a second template, and a receiving groove that sequentially penetrates the first template and the second template and communicates with the flow channel;

[0007] A connecting sleeve, which is detachably disposed in the accommodating groove and extends along the length direction of the accommodating groove, and a gate sleeve connected to the runner is disposed in the connecting sleeve, wherein a straight-line distance between the gate sleeve and the runner is smaller than a straight-line distance between the first template and the runner.

[0008] In the above-mentioned injection mold with a built-in sprue sleeve, the connecting sleeve is provided with a connecting groove running through the connecting sleeve, the sprue sleeve is detachably clamped in the connecting groove, and is connected to the runner through the connecting groove, and the top of the sprue sleeve is located below the first template.

[0009] In the above-mentioned injection mold with a built-in gate sleeve, the connecting groove includes a first connecting groove and a second connecting groove which are interconnected, the first connecting groove extends along the height direction of the first template, the second connecting groove extends along the height direction of the second template, and the diameter of the first connecting groove is larger than the diameter of the second connecting groove.

[0010] In the above-mentioned injection mold with a built-in sprue sleeve, the second connecting groove is snap-fitted with the sprue sleeve, and the straight-line distance between the second connecting groove and the runner is smaller than the straight-line distance between the second template and the runner.

[0011] In the above-mentioned injection mold with a built-in sprue sleeve, a plurality of first threaded holes are provided in the second connecting groove, and a plurality of second threaded holes corresponding to the first threaded holes are provided on the sprue sleeve, so that the sprue sleeve and the connecting sleeve form a threaded connection.

[0012] In the above-mentioned injection mold with a built-in sprue sleeve, the first connecting groove is coaxial with the second connecting groove, and the first connecting groove has a transition arc surface at one end close to the second connecting groove.

[0013] In the above-mentioned injection mold with a built-in gate sleeve, the connecting sleeve is in the shape of a boss, which includes a connecting part that is clamped on the first template and threadedly connected to the first template, and a plurality of third threaded holes are provided on the connecting part, and the first template is provided with fourth threaded holes that correspond one-to-one to the third threaded holes.

[0014] In the above-mentioned injection mold with a built-in gate sleeve, the receiving groove includes a first receiving groove and a second receiving groove arranged coaxially, the first receiving groove is arranged on the first template and passes through the first template, and the second receiving groove is arranged on the second template and passes through the second template.

[0015] In the above-mentioned injection mold with a built-in gate sleeve, the first accommodating groove is T-shaped, which includes a clamping part that is connected to the outside and clamped with the connecting part. The diameter of the clamping part is larger than the diameter of the connecting part, and a positioning ring is also detachably provided in the clamping part.

[0016] In the above-mentioned injection mold with a built-in sprue sleeve, the positioning ring is threadedly connected to the first template, and is provided with a plurality of fifth threaded holes, and the first template is also provided with a plurality of sixth threaded holes corresponding to the fifth threaded holes one by one.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: by setting a receiving groove that sequentially passes through the first template and the second template, a connecting sleeve extending into the second template is set in the receiving groove, and the gate sleeve is built into the connecting sleeve, thereby significantly shortening the straight-line distance from the gate sleeve to the runner, effectively reducing the length of the entire injection molding runner, reducing the loss of raw materials, and reducing the heat loss of the plastic melt, thereby improving the injection molding efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the injection mold according to an embodiment of the utility model.

[0019] Figure 2 It is an exploded view of the injection mold of the embodiment of the utility model.

[0020] Figure 3 It is a schematic structural diagram of the connecting sleeve in the embodiment of the utility model.

[0021] Figure 4 It is a cross-sectional view of the connecting sleeve in the embodiment of the utility model.

[0022] In all the drawings, the same figure marks represent the same technical features, specifically: 100, cavity template; 110, runner; 200, first template; 210, fourth threaded hole; 220, sixth threaded hole; 300, second template; 400, accommodating groove; 410, first accommodating groove; 411, clamping portion; 420, second accommodating groove; 500, connecting sleeve; 510, first connecting groove; 520, second connecting groove; 521, first threaded hole; 530, transition arc surface; 540, connecting portion; 541, third threaded hole; 600, gate sleeve; 610, second threaded hole; 620, guide channel; 700, positioning ring; 710, fifth threaded hole. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] like Figures 1 to 4 As shown, an injection mold with a built-in sprue bushing includes a cavity template 100, a first template 200, a second template 300, a receiving groove 400, a connecting sleeve 500, a sprue bushing 600 and a positioning ring 700.

[0026] like Figures 1 to 4 As shown, an injection mold with a built-in sprue bushing comprises:

[0027] A cavity template 100, wherein a flow channel 110 is provided on the cavity template 100;

[0028] An upper template, which is located above the cavity template 100 and includes a first template 200, a second template 300, and a receiving groove 400 that passes through the first template 200 and the second template 300 in sequence and communicates with the flow channel 110;

[0029] The connecting sleeve 500 is detachably disposed in the accommodating groove 400 and extends along the length direction of the accommodating groove 400, and a sprue sleeve 600 connected to the runner 110 is disposed in the connecting sleeve 500, wherein the straight-line distance between the sprue sleeve 600 and the runner 110 is smaller than the straight-line distance between the first template 200 and the runner 110. By providing the connecting sleeve 500 extending into the second template 300 and embedding the sprue sleeve 600 in the connecting sleeve 500, the straight-line distance from the sprue sleeve 600 to the runner 110 is significantly shortened, thereby effectively reducing the length of the entire injection runner, reducing the loss of raw materials, reducing the heat loss of the plastic melt, and improving the injection molding efficiency and product quality.

[0030] like Figures 1 to 4 As shown, in this embodiment, the injection mold is provided with an upper template and a cavity template 100 from top to bottom, the upper template includes a first template 200 as a fixed template, and a second template 300 as a runner separation plate, and the cavity template 100 is provided with a flow channel 110 for molding the product toward the second template 300.

[0031] In this embodiment, the first template 200 and the second template 300 are arranged in a close fit, and the upper template also includes a receiving groove 400 that passes through the first template 200 and the second template 300 in sequence and is in flow communication with each other, for placing the connecting sleeve 500 and allowing the connecting sleeve 500 to sink into the second template 300.

[0032] In this embodiment, the receiving groove 400 includes a first receiving groove 410 and a second receiving groove 420 which are coaxially arranged. The first receiving groove 410 is provided at the center of the first template 200 and passes through the first template 200. The second receiving groove 420 is provided at the center of the second template 300 and passes through the second template 300. The coaxial and separate design of the first receiving groove 410 and the second receiving groove 420 not only ensures the verticality of the connecting sleeve 500, but also simplifies the mold structure and reduces the manufacturing cost.

[0033] In this embodiment, the first accommodating groove 410 is T-shaped, and includes an annular clamping portion 411 that is connected to the outside and is clamped with the connecting portion 540 of the connecting sleeve 500. The diameter of the clamping portion 411 is larger than the diameter of the connecting portion 540, and a positioning ring 700 is detachably provided in the clamping portion 411. The positioning accuracy and stability of the sprue bushing 600 are effectively improved, ensuring the consistency and product quality of each injection.

[0034] In this embodiment, the positioning ring 700 is clamped in the clamping portion 411 and is threadedly connected to the first template 200. A plurality of fifth threaded holes 710 are provided thereon, and a plurality of sixth threaded holes 220 corresponding one-to-one to the fifth threaded holes 710 are also provided on the first template 200 to realize convenient installation and disassembly of the positioning ring 700.

[0035] Preferably, in this embodiment, the fourth threaded holes 210 and the fifth threaded holes 710 are each provided with four groups and are arranged in a ring shape, which effectively ensures the stability and reliability of the positioning ring 700 after installation.

[0036] To achieve the placement and sinking of the sprue bushing 600 , in this embodiment, the connecting sleeve 500 is detachably disposed in the receiving groove 400 and extends along the length direction of the receiving groove 400 to form a space for the placement and sinking of the sprue bushing 600 .

[0037] In this embodiment, the connecting sleeve 500 is provided with a connecting groove running through the connecting sleeve 500, and the gate sleeve 600 is detachably mounted in the connecting groove and connected to the runner 110 through the connecting groove, and the top of the gate sleeve 600 is located below the first template 200. On the one hand, the gate sleeve 600 can be conveniently installed and disassembled, thereby enhancing the flexibility and use efficiency of the mold. On the other hand, the gate sleeve 600 can be connected to the runner 110 after sinking to the position of the second template 300, so that the injection runner formed by the gate sleeve 600 and the runner 110 does not need to pass through the first template 200, thereby effectively shortening the length of the injection runner, thereby reducing the loss of raw materials, and improving the injection molding efficiency and product quality.

[0038] In this embodiment, the connecting sleeve 500 is in the shape of a boss, and includes a connecting portion 540 that is clamped on the first template 200 and threadedly connected to the first template 200. The connecting portion 540 is provided with a plurality of third threaded holes 541, and the first template 200 is provided with fourth threaded holes 210 that correspond one-to-one to the third threaded holes 541, so as to realize convenient installation and disassembly of the connecting sleeve 500 and ensure the stability of the connecting sleeve 500 during use.

[0039] Preferably, in this embodiment, the third threaded holes 541 and the fourth threaded holes 210 are each provided with four groups and arranged in a ring shape, which effectively ensures the stability and reliability of the connecting sleeve 500 after installation.

[0040] In this embodiment, the connection groove includes a first connection groove 510 and a second connection groove 520 that are interconnected, the first connection groove 510 extends along the height direction of the first template 200, the second connection groove 520 extends along the height direction of the second template 300, and the diameter of the first connection groove 510 is greater than the diameter of the second connection groove 520. On the one hand, it is convenient for the sprue bushing 600 to be installed in the connection groove, and on the other hand, it is convenient for the gun nozzle to smoothly enter the connection groove and connect with the sprue bushing 600.

[0041] In this embodiment, the second connecting groove 520 is T-shaped, which is clamped with the gate sleeve 600, and the straight-line distance between the second connecting groove 520 and the runner 110 is smaller than the straight-line distance between the second template 300 and the runner 110. Therefore, while ensuring the stability of the connection between the gate sleeve 600 and the connecting sleeve 500, the gate sleeve 600 can be connected to the runner 110 as close to the cavity template 100 as possible.

[0042] In this embodiment, a plurality of first threaded holes 521 are provided in the second connecting groove 520, and a plurality of second threaded holes 610 corresponding to the first threaded holes 521 are provided on the sprue sleeve 600, so that the sprue sleeve 600 and the connecting sleeve 500 form a threaded connection, thereby realizing convenient installation and disassembly of the sprue sleeve 600 and ensuring the stability of the sprue sleeve 600 during use.

[0043] Preferably, in this embodiment, the first threaded holes 521 and the second threaded holes 610 are provided in two groups and are arranged symmetrically, which effectively ensures the stability and reliability of the sprue bushing 600 after installation.

[0044] In this embodiment, the first connection groove 510 is coaxial with the second connection groove 520, and the first connection groove 510 has a transition arc surface 530 at one end close to the second connection groove 520. The coaxial design simplifies the assembly steps of the gate sleeve 600 and the connection sleeve 500, so that the components can be docked more smoothly, reducing the assembly time and difficulty. In addition, through the coaxial and transition arc surface 530 design, the stress at the connection can be better dispersed, local stress concentration can be avoided, the overall stability and durability of the mold can be enhanced, and the service life of the mold can be extended.

[0045] In this embodiment, the sprue bushing 600 includes a flow guide channel 620 that runs through the sprue bushing, and the flow guide channel 620 is connected to the flow channel 110 and cooperates to form an injection flow channel.

[0046] It should be noted that in the present utility model, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0047] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] 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.

Claims

1. An injection mold with a built-in sprue bushing, characterized in that: include: A cavity template, wherein a flow channel is provided on the cavity template; An upper template, the upper template is located above the cavity template, and includes a first template, a second template, and a receiving groove that sequentially penetrates the first template and the second template and communicates with the flow channel; A connecting sleeve, which is detachably disposed in the accommodating groove and extends along the length direction of the accommodating groove, and a gate sleeve connected to the runner is disposed in the connecting sleeve, wherein a straight-line distance between the gate sleeve and the runner is smaller than a straight-line distance between the first template and the runner.

2. The injection mold with a built-in sprue bushing according to claim 1, characterized in that: The connecting sleeve is provided with a connecting groove running through the connecting sleeve, the sprue sleeve is detachably clamped in the connecting groove, and is connected with the runner through the connecting groove, and the top of the sprue sleeve is located below the first template.

3. The injection mold with a built-in sprue bushing according to claim 2, characterized in that: The connecting groove includes a first connecting groove and a second connecting groove which are connected to each other, the first connecting groove extends along the height direction of the first template, the second connecting groove extends along the height direction of the second template, and the diameter of the first connecting groove is greater than the diameter of the second connecting groove.

4. The injection mold with a built-in sprue bushing according to claim 3, characterized in that: The second connecting groove is clamped with the gate sleeve, and a straight-line distance between the second connecting groove and the flow channel is smaller than a straight-line distance between the second template and the flow channel.

5. The injection mold with a built-in sprue bushing according to claim 4, characterized in that: A plurality of first threaded holes are arranged in the second connecting groove, and a plurality of second threaded holes corresponding to the first threaded holes are arranged on the gate sleeve, so that the gate sleeve and the connecting sleeve form a threaded connection.

6. The injection mold with a built-in sprue bushing according to claim 3, characterized in that: The first connecting groove is coaxial with the second connecting groove, and one end of the first connecting groove close to the second connecting groove has a transition arc surface.

7. The injection mold with a built-in sprue bushing according to claim 1, characterized in that: The connecting sleeve is in the shape of a boss, and includes a connecting portion that is clamped on the first template and threadedly connected to the first template, a plurality of third threaded holes are provided on the connecting portion, and the first template is provided with fourth threaded holes that correspond one-to-one to the third threaded holes.

8. The injection mold with a built-in sprue bushing according to claim 7, characterized in that: The containing groove comprises a first containing groove and a second containing groove which are coaxially arranged. The first containing groove is arranged on the first template and passes through the first template. The second containing groove is arranged on the second template and passes through the second template.

9. The injection mold with a built-in sprue bushing according to claim 8, characterized in that: The first accommodating groove is T-shaped, and includes a clamping portion that is connected to the outside and clamped with the connecting portion. The diameter of the clamping portion is larger than the diameter of the connecting portion. A positioning ring is detachably provided in the clamping portion.

10. The injection mold with a built-in sprue bushing according to claim 9, characterized in that: The positioning ring is threadedly connected to the first template, and is provided with a plurality of fifth threaded holes. The first template is also provided with a plurality of sixth threaded holes corresponding to the fifth threaded holes one by one.

Images