Multi-cavity forming mechanism of injection mold

Abstract

The utility model relates to the field of injection molds, in particular to an injection mold multi-cavity forming mechanism which comprises a fixed mold and a movable mold arranged on the fixed mold, a mold cavity for mold materials is formed between the fixed mold and the movable mold, the fixed mold is slidably connected with a mold separation plate, the sliding direction of the mold separation plate is parallel to the distribution direction of the fixed mold and the movable mold, and the mold separation plate slidably extends into the mold cavity. A positioning groove is formed in the fixed mold, the mold separation plates are clamped into the positioning groove, the mold separation plates divide the mold cavity into a plurality of mold cavities, a backflow pipe is arranged on the fixed mold and communicated with the mold cavity, and an exhaust mechanism is arranged on the fixed mold and used for exhausting gas in the mold cavity. The mold cavity is filled with the mold material and then is divided into a plurality of mold cavities, so that the mold material can be uniformly filled into each mold cavity.

Description

Technical fields:

[0001] This utility model belongs to the technical field of injection molds, and specifically refers to a multi-cavity molding mechanism for injection molds. Background technology:

[0002] Injection molds are essential process equipment for producing various industrial products. With the rapid development of the plastic mold design industry and the widespread application of plastic products in aerospace, electronics, machinery, shipbuilding, and automotive industries, the market demands for injection molds are increasing. In the manufacturing process of air conditioners, injection molds are typically used to produce related components. However, existing injection molds for producing air conditioner components usually only produce a single product, resulting in low production efficiency and failing to meet the requirements of high-efficiency production for enterprises.

[0003] Using multi-cavity injection molds can significantly increase the number of products molded in a single batch, thereby reducing unit costs and shortening the production cycle. In related technologies, the mold material in multi-cavity molding molds mostly enters each cavity through runners. Due to the complexity of mold design, material properties, and process parameters, uneven filling of the melt in each cavity is prone to occur, which needs to be improved. Summary of the Invention:

[0004] The purpose of this invention is to provide a multi-cavity molding mechanism for injection molds to solve the technical problems mentioned in the background art.

[0005] This utility model is implemented as follows:

[0006] A multi-cavity molding mechanism for injection molds includes a fixed mold and a movable mold disposed on the fixed mold. A mold cavity for mold material is formed between the fixed mold and the movable mold. A partition plate is slidably connected to the fixed mold. The sliding direction of the partition plate is parallel to the distribution direction of the fixed mold and the movable mold. The partition plate slides into the mold cavity. The fixed mold is provided with a positioning groove for the partition plate to be engaged. The partition plate divides the mold cavity into several cavities. A return pipe is provided on the fixed mold and communicates with the mold cavity. An exhaust mechanism is provided on the fixed mold for the exhaust of gas from the mold cavity.

[0007] By adopting the above technical solution, before injecting the molding material, the venting mechanism is opened, the sealing component disconnects the return pipe, and the molding material is injected into the mold cavity. After the molding material is full, the venting device is closed, the partition plate moves and extends into the mold cavity to divide the mold cavity into several cavities, and the sealing component opens the return pipe, allowing excess molding material to flow out through the return pipe. Filling the mold cavity with molding material first and then dividing it into several cavities facilitates the uniform filling of each cavity by the molding material.

[0008] Preferably, the fixed mold has a liquid outlet channel communicating with the return pipe, the sealing element is a block, the block slides on the fixed mold, the block controls the opening and closing of the return pipe by sliding to block or open the liquid outlet channel, the fixed mold is provided with an elastic clamping element, the elastic clamping element abuts against the block so that the block has the tendency to move and block the liquid outlet channel.

[0009] By adopting the above technical solution, during operation, the elastic element presses against the plug block to seal the liquid outlet channel, keeping the liquid outlet channel and return pipe closed during injection into the mold cavity. As the partition plate moves into the mold cavity, the hydraulic pressure inside the cavity increases. Under the action of hydraulic pressure, the plug block overcomes the force of the elastic element and moves to open the liquid outlet channel and return pipe, allowing the mold material to flow out. As the mold material flows out, the hydraulic pressure inside the mold cavity decreases, and the plug block, under the action of the elastic element, re-seals the liquid outlet channel and return pipe. This facilitates automatic sealing of the liquid outlet channel and return pipe.

[0010] Preferably, the fixed mold includes a template and an adjusting knob threadedly connected to the template, the elastic abutment is disposed on the adjusting knob, the blocking block is slidably connected inside the template, and the adjusting torque drives the elastic abutment to move toward or away from the blocking block.

[0011] By adopting the above technical solution, the depth of the block extending into the flow channel can be controlled by adjusting the adjusting torque before the mechanism works, thereby adjusting the hydraulic pressure required to open the block and facilitating the adjustment of the molding pressure inside the mold cavity.

[0012] Preferably, the fixed mold is provided with a pressure detection element, the adjusting knob is provided with a pressure detection element, the pressure detection element is used to detect the molding pressure in the mold cavity, a limiting surface is formed on the template, the blocking block abuts against the limiting surface, when the limiting surface abuts against the blocking block, one end of the limiting surface is flush with the inner wall of the mold cavity.

[0013] By adopting the above technical solution, and by setting a pressure detection mechanism between the elastic clamping element and the plug on the adjusting knob, when the molding pressure is greater than the pressure exerted by the elastic element on the plug, the plug opens the return pipe and the liquid outlet channel, which helps to improve the adjustment accuracy.

[0014] Preferably, the liquid outlet channel is connected to several of the mold cavities, the liquid inlet of the liquid outlet channel is connected to several mold cavities, and the area of ​​the portion of the liquid outlet channel connected to each mold cavity is the same.

[0015] By adopting the above technical solution, it is beneficial to reduce the difference in molding pressure in each cavity and maintain molding stability.

[0016] Preferably, the liquid outlet channel is gradually widened in the direction away from the mold cavity in the cross section parallel to the sliding direction of the partition template.

[0017] By adopting the above technical solution, it is beneficial to reduce the movement distance of the blockage.

[0018] Preferably, the partition template includes a connecting shaft and several partitions, both of which are slidably connected to the fixed mold. The cavity is formed by splicing the partitions and the inner wall of the mold cavity, and the several cavities are arranged circumferentially around the connecting shaft.

[0019] By adopting the above technical solution, several cavities are arranged circumferentially around the connecting shaft, which facilitates the uniform distribution of the mold material and rapid molding.

[0020] Preferably, the partition template has a seam at one end near the positioning groove, and the seam connects the adjacent cavities.

[0021] By adopting the above technical solution, it is convenient to remove several injection molded products at the same time.

[0022] The outstanding advantages of this utility model compared to the prior art are:

[0023] 1. In this invention, before the molding material is injected, the venting mechanism is opened, and the sealing component disconnects the return pipe, allowing the molding material to be injected into the mold cavity. Once the mold material is full, the venting device is closed, the partition plate moves and extends into the mold cavity to divide it into several cavities, and the sealing component opens the return pipe, allowing excess molding material to flow out through the return pipe. Filling the mold cavity with molding material first, and then dividing it into several cavities, facilitates the even filling of each cavity by the molding material.

[0024] 2. This utility model uses an elastic element to press against the plug, sealing the liquid outlet channel. During injection into the mold cavity, the liquid outlet channel and return pipe remain closed. As the partition plate moves into the mold cavity, the hydraulic pressure inside the cavity increases. Under the action of the hydraulic pressure, the plug overcomes the force of the elastic element and moves to open the liquid outlet channel and return pipe, allowing the mold material to flow out. As the mold material flows out, the hydraulic pressure inside the mold cavity decreases, and the plug, under the action of the elastic element, re-seals the liquid outlet channel and return pipe. This facilitates automatic sealing of the liquid outlet channel and return pipe.

[0025] 3. The present invention has several cavities arranged circumferentially around the connecting shaft, which facilitates the uniform distribution of the molding material and rapid molding. Attached image description:

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model, showing the structure between the partition template and the moving mold when the partition template extends;

[0027] Figure 2 This is a partial sectional view of the present invention, mainly showing the structure of the cavity;

[0028] Figure 3 This is a partial structural schematic diagram of the present invention, mainly showing the structure of the fixed mold;

[0029] Figure 4 This is a partial cross-sectional view of the present invention at the template, mainly showing the moving structure of the block.

[0030] Instruction manual drawing reference numerals: 1. Fixed mold; 11. Positioning groove; 12. Sealing component; 121. Block; 13. Liquid outlet channel; 14. Sliding port; 15. Template; 151. Limiting surface; 16. Adjusting knob; 161. Elastic clamping component; 1611. Spring; 162. Pressure detection element; 2. Moving mold; 21. Partition template; 211. Connecting shaft; 212. Partition plate; 2121. Seam; 22. Drive cylinder; 3. Mold cavity; 31. Cavity; 4. Exhaust mechanism; 5. Return pipe. Detailed implementation method:

[0031] The present invention will be further described below with reference to specific embodiments:

[0032] This application discloses a multi-cavity molding mechanism for injection molds. See also: A multi-cavity molding mechanism for injection molds. Figure 1 The system includes a fixed mold 1 and a moving mold 2, which are horizontally distributed and form a mold cavity 3 for injecting molding material. Both the fixed mold 1 and the moving mold 2 are equipped with control systems, which are arranged around the mold cavity 3 and are used to control the internal temperature of the mold cavity 3. The control system is not shown in the accompanying drawings of the embodiment. The drawings are used for molding rod-shaped molding materials. In actual products, the moving mold has a flow channel for the molding material to flow into the mold cavity 3.

[0033] See Figure 1 and Figure 2 A partition plate 21 is slidably connected to the moving mold 2. The sliding direction of the partition plate 21 is parallel to the distribution direction of the fixed mold 1 and the moving mold 2. The partition plate 21 slides into or out of the mold cavity 3. When the partition plate 21 extends into the mold cavity 3, it divides the mold cavity 3 into several cavities 31. The partition plate 21 includes a connecting shaft 211 and several partition plates 212. The partition plates 212 are arranged around the outer periphery of the connecting shaft 211. Both the connecting shaft 211 and the partition plates 212 are slidably connected to the moving mold 2. The partition plates 212 and the connecting shaft 211 are integrally formed. A drive cylinder 22 is installed on the moving mold 2. The drive cylinder 22 drives the connecting shaft 211 to move and extend into the mold cavity 3.

[0034] See Figure 2 and Figure 3A positioning groove 11 is provided on the fixed mold 1. The positioning groove 11 is located inside the mold cavity 3 and is connected to the mold cavity 3. The positioning groove 11 allows the connecting shaft 211 and the partition plate 212 to be engaged and positioned. After the connecting shaft 211 and the partition plate 212 are engaged in the positioning groove 11, the end of the partition plate 212 away from the connection fits against the inner wall of the mold cavity 3. The cavity 31 is formed by splicing the inner wall of the mold cavity 3 and the partition plate 212. Several cavities 31 are arranged around the connecting shaft 211. A joint 2121 is provided at the end of the partition plate 212 near the positioning groove 11. The joint 2121 connects two adjacent cavities 31, which facilitates the simultaneous removal of several molded products during the demolding process and helps to improve demolding efficiency.

[0035] See Figure 1 and Figure 3 The fixed mold 1 is equipped with an exhaust mechanism 4, which is located above the mold cavity 3. The exhaust mechanism 4 is used to discharge the gas in the mold cavity 3, thereby reducing the internal porosity of the molded product. The fixed mold 1 is externally connected to a return pipe 5, which is used to collect excess mold material. The fixed mold 1 is equipped with a sealing component 12, which is used to control the opening and closing of the return pipe 5.

[0036] During the processing, the fixed mold 1 and the moving mold 2 are mounted on the support platform of the injection mold. After the fixed mold 1 and the moving mold 2 are closed, the mold material is injected into the mold cavity 3. After the mold material is injected, the venting mechanism 4 is closed, and the control system controls the internal temperature of the mold cavity 3 to maintain a constant temperature, keeping the mold material flowing. The drive cylinder 22 drives the connecting shaft 211 and the partition plate 212 to extend into the mold cavity 3, and the sealing component 12 opens the return pipe 5, allowing excess mold material to flow out of the mold cavity 3 and be recycled under the pressure of the partition plate 21. When the partition plate 21 is engaged in the positioning groove 11, the return pipe 5 is closed, and the mold material evenly fills each cavity 31 and the seam 2121. The control system controls the internal cooling of the mold cavity 3, so that the mold material inside the cavity 31 and the seam 2121 is formed. After the mold material is formed, the moving mold 2 and the fixed mold 1 separate, and the molded product is demolded.

[0037] See Figure 1 and Figure 4 The fixed mold 1 is provided with a liquid outlet channel 13. The return pipe 5 and the mold cavity 3 are connected through the liquid outlet channel 13. The liquid outlet channel 13 is L-shaped. The length direction of the end of the liquid outlet channel 13 near the mold cavity 3 is parallel to the distribution direction of the fixed mold 1 and the moving mold 2. The end of the liquid outlet channel 13 near the mold cavity 3 is gradually widened in the direction away from the mold cavity 3.

[0038] After the partition plate 21 is inserted into the positioning groove 11, the end of the liquid outlet channel near the mold cavity 3 is connected to several cavities 31, and the liquid inlet of the liquid outlet channel 13 near the mold cavity 3 has the same connection area with each cavity 31.

[0039] See Figure 3 and Figure 4The sealing component 12 is a plug 121, which is slidably connected to the fixed mold 1. The sliding direction of the plug 121 is parallel to the distribution direction of the fixed mold 1 and the moving mold 2. The fixed mold 1 has a sliding port 14, which is located on the side of the liquid outlet channel 13 away from the mold cavity 3. The sliding port 14 is connected to the liquid outlet channel 13. The plug 121 moves between the sliding port 14 and the liquid outlet channel 13. The plug 121 slides and covers the end of the liquid outlet channel 13 near the mold cavity 3. The plug 121 controls the opening and closing of the return pipe 5 by controlling the opening and closing of the liquid outlet channel 13 and the mold cavity 3. This helps to reduce the gap between each cavity 31.

[0040] The end of the block 121 away from the mold cavity 3 is located inside the sliding opening 14. The block 121 blocks the sliding opening 14, reducing the amount of mold material entering the sliding opening 14.

[0041] See Figure 4 The fixed mold 1 includes a template 15 and an adjusting knob 16. The mold cavity 3, the positioning groove 11, and the blocking block 121 are all located on the template 15. The adjusting knob 16 is located on the side of the blocking block 121 away from the mold cavity 3. The adjusting knob 16 is threadedly connected to the template 15. When the adjusting knob 16 is rotated, the adjusting knob 16 slides into or out of the template 15 through the threaded engagement with the template 15. An elastic abutment 161 is fixed on the adjusting knob 16. The elastic abutment 161 is a spring 1611. The spring 1611 is located on the side of the adjusting knob 16 closer to the blocking block 121. The opposite ends of the elastic abutment 161 are fixedly connected to the adjusting knob 16 and the blocking block 121, respectively. The spring 1611 presses against the blocking block 121, so that the blocking block 121 has the tendency to move and block the liquid outlet channel 13 closer to the mold cavity 3. A limiting surface 151 is machined on the template 15. The limiting surface 151 is located on the side of the block 121 away from the spring 1611. The limiting surface 151 is used to abut against the block 121, so that the end of the block 121 near the mold cavity 3 is parallel to the inner wall of the mold cavity 3. In the embodiments of this application, the spring 1611 is stainless steel, alloy steel, or special high-temperature resistant spring steel 1611.

[0042] After the mold material is injected, the drive cylinder 22 drives the partition plate 21 to extend into the mold cavity 3. The molding pressure in the mold cavity 3 increases. When the molding pressure on the block 121 is greater than the elastic force of the spring 1611, the block 121 moves closer to the adjusting knob 16 to open the liquid outlet channel 13, allowing excess mold material to enter the return pipe 5 through the liquid outlet channel 13. This facilitates automatic control of the opening and closing of the return pipe 5.

[0043] See Figure 4 A pressure sensing element 162 is installed on the adjusting knob 16. The pressure sensing element 162 is used to detect the force exerted by the spring 1611 on the adjusting knob, and thus determine the force exerted by the spring 1611 on the block 121. By rotating the adjusting knob 16, it is convenient to make timely adjustments after the molding pressure inside the mold cavity 3 changes.

[0044] The implementation principle of the injection molding multi-cavity molding mechanism in this application embodiment is as follows: first, the mold cavity 3 is filled with mold material, and then the mold cavity 3 is divided into several cavities 31, which is conducive to the uniform filling of each cavity 31 by the mold material.

[0045] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-cavity molding mechanism for injection molds, characterized in that: The device includes a fixed mold (1) and a movable mold (2) disposed on the fixed mold (1). A mold cavity (3) for the molded material is formed between the fixed mold (1) and the movable mold (2). The movable mold (2) and the fixed mold (1) are provided with a control system for controlling the internal temperature of the mold cavity (3). A partition plate (21) is slidably connected to the movable mold (2). The sliding direction of the partition plate (21) is parallel to the distribution direction of the fixed mold (1) and the movable mold (2). The partition plate (21) slides into the mold cavity (3). The fixed mold (1) The mold has a positioning groove (11) for the partition template (21) to be inserted into. The partition template (21) divides the mold cavity (3) into several cavities (31). The fixed mold (1) has a return pipe (5) connected to the mold cavity (3). The fixed mold (1) has an exhaust mechanism (4) for the gas in the mold cavity (3) to be discharged. The fixed mold (1) has a sealing element (12) for controlling the opening and closing of the return pipe (5).

2. The multi-cavity molding mechanism for injection molds according to claim 1, characterized in that: The fixed mold (1) is provided with a liquid outlet channel (13) that communicates with the return pipe (5). The sealing member (12) is a block (121). The block (121) slides on the fixed mold (1). The block (121) controls the opening and closing of the return pipe (5) by sliding to block or open the liquid outlet channel (13). The fixed mold (1) is provided with an elastic clamping member (161). The elastic clamping member (161) clamps the block (121) so that the block (121) has the tendency to move and block the liquid outlet channel (13).

3. The multi-cavity molding mechanism for injection molds according to claim 2, characterized in that: The fixed mold (1) includes a template (15) and an adjusting knob (16) threaded onto the template (15). The elastic abutment (161) is located on the adjusting knob (16). The block (121) is slidably connected to the template (15). The adjusting knob (16) rotates and drives the elastic abutment (161) to move closer to or further away from the block (121).

4. The multi-cavity molding mechanism for injection molds according to claim 3, characterized in that: The adjusting knob (16) is provided with a pressure detection element (162), which is used to detect the molding pressure in the mold cavity (3). A limiting surface (151) is formed on the template (15). The block (121) abuts against the limiting surface (151). When the limiting surface (151) abuts against the block (121), one end of the limiting surface (151) is flush with the inner wall of the mold cavity (3).

5. The multi-cavity molding mechanism for injection molds according to claim 4, characterized in that: The liquid outlet channel (13) is connected to multiple cavities (31), and the connection area between each cavity (31) and the liquid inlet of the liquid outlet channel (13) is consistent.

6. The multi-cavity molding mechanism for injection molds according to claim 4, characterized in that: The liquid outlet channel (13) is gradually widened in the direction away from the mold cavity (3).

7. The multi-cavity molding mechanism for injection molds according to claim 1, characterized in that: The partition plate (21) includes a connecting shaft (211) and several partitions (212). Both the partitions (212) and the connecting shaft (211) are slidably connected to the fixed mold (1). The cavity (31) is formed by splicing the partitions (212) and the inner wall of the mold cavity (3). Several cavities (31) are arranged circumferentially around the connecting shaft (211).

8. The multi-cavity molding mechanism for injection molds according to claim 1, characterized in that: The partition template (21) has a seam (2121) at one end near the positioning groove (11), and the seam (2121) connects the adjacent cavity (31).

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