Sliding block core-pulling demolding mechanism of tail box inner container injection mold

Abstract

The utility model relates to a sliding block core-pulling demolding mechanism of a tail box inner container injection mold, and belongs to the technical field of injection molds. A first hydraulic cylinder fixedly connected is arranged on the side wall of the movable mold plate, a first piston rod is arranged on the first hydraulic cylinder and extends into the forming cavity to form a pin hole in one side, a second piston rod is arranged on the second hydraulic cylinder, a sliding block fixedly connected is arranged on the second piston rod, an ejection block slidably connected is arranged on the sliding rail, and a forming part is arranged on one side of the ejection block. The forming part is arranged in the forming cavity and used for forming a pin hole in the other side. According to the scheme, the first piston rod and the ejector block are directly arranged in the forming cavity and used for forming the structure of the pin hole in the mounting groove in the injection molding process, and then the first piston rod and the ejector block are pulled out of the forming cavity through the core pulling mechanism, so that interference caused in the demolding process is avoided; and secondary punching treatment is not needed, so that the production efficiency of the inner container is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a slider core-pulling and demoulding mechanism of a tail box liner injection mold. Background Art

[0002] In the structure of electric vehicles, a trunk is usually installed at the rear of the electric vehicle to store items needed for travel. The trunk consists of a lower box and an upper box, wherein the lower box is provided with an inner liner structure, and the upper box is connected to the inner liner by a hinged connection. Therefore, it is necessary to provide a mounting groove in the inner liner structure, and to open pin holes on both sides of the mounting groove for subsequent installation processes. Since the inner liner is made of plastic raw materials, it is manufactured using an injection mold, which can produce the product efficiently and accurately.

[0003] The production process of the mold is to first heat the plastic raw material to a molten state, and then inject the plastic melt into the molding cavity of the mold. After the plastic melt fills the molding cavity and cools and forms, a plastic product corresponding to the molding cavity structure will be formed. After the mold is opened, the mold is ejected through the demoulding mechanism, and the product can be manufactured and produced quickly.

[0004] However, the injection molds in the prior art still have some shortcomings. During the production process, the liner injection molds in the prior art only mold the side walls and the mounting groove structure of the liner. The pin holes on the mounting grooves need to be punched a second time after the liner is demolded. If the structure for forming the pin holes is directly set in the mold, the liner will be difficult to eject from the mold during the demolding process. Since the pin hole structure cannot be molded in the mold at one time, the production efficiency of the liner is reduced. Summary of the invention

[0005] The purpose of the utility model is to solve the problems existing in the existing technology and to propose a slider core-pulling and demoulding mechanism for a trunk liner injection mold. The technical problem to be solved by the utility model is: how to make the pin hole structure on the installation groove be formed in one time inside the mold to improve the production efficiency of the liner.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a slider core-pulling demoulding mechanism of a tail box liner injection mold, comprising a top plate, a fixed mold plate, a movable mold plate, a foot plate and a bottom plate arranged in sequence, a push plate that moves back and forth is provided on the inner side of the foot plate, a molding cavity for injection molding is provided between the fixed mold plate and the movable mold plate, a cooling molded liner is provided in the molding cavity, a mounting groove is provided on the outer side wall of the liner, pin holes are provided on both sides of the mounting groove, a first hydraulic cylinder that is fixedly connected is provided on the side wall of the movable mold plate, a first piston rod is provided on the first hydraulic cylinder, and the The first piston rod extends into the molding cavity to form a pin hole on one side, the movable mold plate is provided with a fixed connecting plate, the connecting plate is provided with a core pulling mechanism, the core pulling mechanism includes a second hydraulic cylinder fixedly connected to the connecting plate, the second hydraulic cylinder is provided with a second piston rod, the second piston rod is provided with a fixed sliding block, an inclined sliding rail is provided inside the sliding block, a sliding rail is provided with a slidingly connected top block, a molding part is provided on one side of the top block, the molding part is provided inside the molding cavity to form the pin hole on the other side, and the sliding rail is inclined toward the side away from the molding part.

[0007] In the present scheme, the pin holes on both sides of the mounting groove are formed by the first piston rod and the forming part on the top block respectively. During the demolding process, the first hydraulic cylinder withdraws the first piston rod from the molding cavity by contracting the first piston rod, and at the same time, the second hydraulic cylinder contracts the second piston rod, and the second piston rod drives the fixed slider to move to the outside of the mold. Since the forming part on one end of the top block is still inside the pin hole after forming, the slider cannot directly drive the top block to be withdrawn, but since a slide rail extending away from the forming part is provided on the slider, the top block will move laterally along the track of the slide rail to the other side where the forming part is provided, thereby completely withdrawing the forming part from the pin hole on the other side, and then the slider continues to move outward to withdraw the entire top block from the molding cavity, and finally the formed liner is ejected from the mold; through the above method, a structure for forming a pin hole is directly provided inside the molding cavity, and then the above structure is withdrawn from the molding cavity by the core pulling mechanism, thereby avoiding interference caused during the demolding process. Since the pin hole on the mounting groove is formed once inside the mold, no secondary punching process is required, thereby improving the production efficiency of the liner.

[0008] In the slider core-pulling demoulding mechanism of the above-mentioned tail box liner injection mold, a first limit block is provided inside the slider, the first limit block is provided in the middle section of the slide rail and protrudes upward, and a guide portion is provided at the bottom of the top block, the guide portion is provided inside the slide rail and can abut against the first limit block. The guide portion guides the top block so that the top block can move along the slide rail. When the molding part is completely pulled out horizontally from the pin hole, the first limit block provided on the slide rail will abut against the guide portion at the bottom of the slider, and the top block will be pulled out longitudinally from the molding cavity.

[0009] In the slider core-pulling demoulding mechanism of the above-mentioned tail box liner injection mold, a second stop block is provided at one end of the slide rail close to the second piston rod, and the guide part reciprocates between the second stop block and the first stop block. Before the injection molding starts, the second hydraulic cylinder extends, and the slider abuts against the guide part through the second stop block on the slide rail, pushing the top block to move inward, so that the molding part on the top block reaches the position where the pin hole is formed.

[0010] In the slider core-pulling demoulding mechanism of the above-mentioned tail box liner injection mold, two mounting grooves with the same structure are provided on the outer wall of the liner, and two core-pulling mechanisms with the same structure are provided on the connecting plate. The above-mentioned core-pulling mechanism forms a pin hole in a mounting groove. Since two mounting grooves are required to improve the stability of the connection when the upper box body is connected to the liner, two core-pulling mechanisms with corresponding structures are provided in the mold to form pin holes in the mounting grooves respectively.

[0011] In the slider core-pulling demoulding mechanism of the above-mentioned tail box liner injection mold, a feed port is provided on the top plate, a feed flow channel is provided at the bottom of the feed port, and the feed flow channel is connected to a nozzle provided inside the fixed mold plate. The plastic raw material heated to a molten state is injected into the feed flow channel through the feed port and then flows into the nozzle.

[0012] In the slider core-pulling demoulding mechanism of the above-mentioned tail box liner injection mold, a plurality of connecting flow channels are provided at the bottom of the inner side of the movable mold plate, the connecting flow channels are connected to the molding cavity, and the bottom of the nozzle is connected to the intersection of the connecting flow channels. The nozzle injects the internal molten liquid into the connecting flow channels, and after the diversion effect of the connecting flow channels, the inside of the molding cavity is filled.

[0013] In the slider core-pulling demoulding mechanism of the above-mentioned tail box liner injection mold, the push plate is provided with a plurality of fixed straight ejector pins, one end of which passes through the movable template and extends to the bottom of the molding cavity, and the bottom of the fixed template and the foot plate is provided with a plurality of supporting feet. The supporting feet are used to support the entire mold. After the core-pulling mechanism is pulled out, the push plate is pushed by the external demoulding device, so that the fixed straight ejector pins on the push plate are ejected from the inside of the movable template to demould the liner.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. In this solution, a first piston rod and a top block are directly arranged inside the molding cavity to form a structure of a pin hole on the mounting groove during the injection molding process, and then the first piston rod and the top block are pulled out of the molding cavity through a core pulling mechanism to avoid interference caused during the demolding process. Since the pin hole on the mounting groove is formed once inside the mold, there is no need for secondary punching, which improves the production efficiency of the liner.

[0016] 2. In this solution, when the molding part on the top block is completely pulled out horizontally from the pin hole, the first limit block arranged on the slide rail will abut against the guide part at the bottom of the slider, and the top block will be pulled out longitudinally from the molding cavity. After demolding is completed and before the next injection molding begins, the second hydraulic cylinder extends, and the slider abuts against the guide part through the second limit block on the slide rail, pushing the top block to move into the molding cavity, so that the molding part on the top block reaches the position where the pin hole is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a right side half-section structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the front cross-sectional structure of the utility model;

[0020] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure in;

[0021] Figure 5 This is a schematic diagram of the structure of the core-pulling mechanism of the utility model;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the inner container of the utility model.

[0023] In the figure, 1, top plate; 1a, feed port; 1b, feed channel; 1c, nozzle; 2, fixed template; 2a, first hydraulic cylinder; 2a1, first piston rod; 3, movable template; 3a, connecting plate; 3b, connecting channel; 4, foot plate; 4a, push plate; 4b, straight ejector pin; 5, bottom plate; 6, core pulling mechanism; 6a, second hydraulic cylinder; 6b, second piston rod; 7, slider; 7a, first limit block; 7b, second limit block; 7c, slide rail; 8, top block; 8a, molding part; 8b, guide part; 9, liner; 9a, mounting groove; 9b, pin hole; 10, supporting foot; 11, molding cavity. DETAILED DESCRIPTION

[0024] 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.

[0025] Example

[0026] like Figure 1As shown, the slider core-pulling demolding mechanism of the trunk liner injection mold includes a top plate 1, a fixed mold plate 2, a movable mold plate 3, a foot plate 4 and a bottom plate 5 arranged in sequence, the top plate 1 is fixedly connected to the fixed mold plate 2, the fixed mold plate 2 is slidably connected to the movable mold plate 3, the movable mold plate 3 is fixedly connected to the foot plate 4, the foot plate 4 is fixedly connected to the bottom plate 5, a slidingly connected push plate 4a is provided on the inner side of the foot plate 4, a plurality of supporting feet 10 are provided at the bottom of the fixed mold plate 2 and the foot plate 4, a fixedly connected connecting plate 3a is provided at the bottom of the movable mold plate 3, two core-pulling mechanisms 6 are provided on the connecting plate 3a, and a feed port 1a is provided at the center of the top plate 1.

[0027] like Figure 2 Combination Figure 3 As shown, a feed channel 1b is provided at the bottom of the feed port 1a, and the feed channel 1b is connected to a nozzle 1c provided inside the movable template 3. A molding cavity 11 is provided between the fixed template 2 and the movable template 3. A plurality of connecting channels 3b are provided at the bottom of the movable template 3, and the connecting channels 3b are connected to the molding cavity 11. The bottom of the nozzle 1c is connected to the intersection of the connecting channels 3b. A plurality of fixed straight ejector pins 4b are provided on the push plate 4a, and one end of the straight ejector pin 4b passes through the movable template 3 and extends to the bottom of the molding cavity 11.

[0028] like Figure 3-5 As shown, first hydraulic cylinders 2a are provided on both sides of the movable template 3, and first piston rods 2a1 are provided on the first hydraulic cylinders 2a on both sides, and the first piston rods 2a1 extend into the molding cavity 11. The core-pulling mechanism 6 on the connecting plate 3a includes a second hydraulic cylinder 6a, and a second piston rod 6b is provided on the second hydraulic cylinder 6a. A fixed slider 7 is provided on the second piston rod 6b, and an inclined slide rail 7c is provided inside the slider 7. A first limit block 7a is provided in the middle section of the slide rail 7c, and a second limit block is provided at one end of the slide rail 7c close to the second piston rod 6b. 7b, a top block 8 is slidably connected to the slide rail 7c, a molding portion 8a is provided on one side of the top block 8, and the molding portion 8a can be moved to the inside of the molding cavity 11, and a guide portion 8b is provided at the bottom of the top block 8 which is slidably connected to the slide rail 7c. The top block 8 is slidably connected to the slide rail 7c through the guide portion 8b structure, and the first limit block 7a and the second limit block 7b can respectively abut against the two ends of the guide portion 8b, and the guide portion 8b reciprocates between the first limit block 7a and the second limit block 7b, and the slide rail 7c is inclined toward the side away from the molding portion 8a.

[0029] exist Figure 4In the structure, the core-pulling mechanism 6 on the left is in an ejected state, and the molding part 8a is located inside the molding cavity 11. The core-pulling mechanism 6 on the right is in a semi-extracted state. At this time, the slider 7 has just completed the lateral movement, and the molding part 8a is completely pulled out from the molding cavity 11. When the slider 7 continues to move outward, the first limit block 7a will abut against the guide part 8b, and the ejector block 8 will be pulled out longitudinally from the molding cavity 11.

[0030] like Figure 6 As shown, a cooled and formed inner liner 9 is provided inside the forming cavity 11, and two mounting grooves 9a are provided on the outer wall of the inner liner 9. Oppositely arranged pin holes 9b are provided on both sides of the mounting groove 9a. The pin hole 9b on one side is formed by the first piston rod 2a1, and the pin hole 9b on the other side is formed by the forming portion 8a on the top block 8.

[0031] The working principle of this scheme is as follows: Figure 1-6 As shown, the plastic raw material heated to a molten state is injected into the feed channel 1b through the feed port 1a, and then flows into the nozzle 1c. After the diversion effect of the bottom connecting channel 3b, the interior of the molding cavity 11 is filled. When the interior of the molding cavity 11 is filled and cooled and formed, the movable template 3 is moved to open the mold for demolding.

[0032] The first hydraulic cylinders 2a on both sides contract the first piston rod 2a1 and pull the first piston rod 2a1 out of the molding cavity 11. At the same time, the second hydraulic cylinder 6a contracts the second piston rod 6b, and the second piston rod 6b drives the fixed slider 7 to move to the outside of the mold. Since the molding portion 8a on one end of the ejector block 8 is still inside the pin hole 9b after molding, the slider 7 cannot directly drive the ejector block 8 to be pulled out. However, since the slider 7 is provided with a slide rail 7c extending away from the molding portion 8a, the ejector block 8 will move laterally along the trajectory of the slide rail 7c to the other side where the molding portion 8a is provided, thereby completely pulling the molding portion 8a out of the pin hole 9b on the other side. Then the slider 7 continues to move outward, and the first limit block 7a will abut against the guide portion 8b at the bottom of the slider 7 to pull the ejector block 8 longitudinally out of the molding cavity 11. Finally, the external demoulding device pushes the push plate 4a to make the straight ejector pin 4b fixed on the push plate 4a eject from the inside of the movable template 3 to demould the inner liner 9. When demoulding is completed and before the next injection molding begins, the second hydraulic cylinder 6a extends, and the slider 7 abuts against the guide portion 8b through the second limit block 7b on the slide rail 7c, pushing the top block 8 to move into the molding cavity 11, so that the molding portion 8a on the top block 8 returns to the position where the pin hole 9b is formed.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0034] Although this article uses more terms such as 1, top plate; 1a, feed port; 1b, feed channel; 1c, nozzle; 2, fixed template; 2a, first hydraulic cylinder; 2a1, first piston rod; 3, movable template; 3a, connecting plate; 3b, connecting channel; 4, foot plate; 4a, push plate; 4b, straight ejector; 5, bottom plate; 6, core pulling mechanism; 6a, second hydraulic cylinder; 6b, second piston rod; 7, slider; 7a, first limit block; 7b, second limit block; 7c, slide rail; 8, top block; 8a, molding part; 8b, guide part; 9, liner; 9a, mounting groove; 9b, pin hole; 10, support foot; 11, molding cavity, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A slider core-pulling demoulding mechanism for a trunk liner injection mold, comprising a top plate (1), a fixed mold plate (2), a movable mold plate (3), a foot plate (4) and a bottom plate (5) arranged in sequence, wherein a reciprocating push plate (4a) is provided on the inner side of the foot plate (4), a molding cavity (11) for injection molding is provided between the fixed mold plate (2) and the movable mold plate (3), and a cooled molded liner (9) is provided in the molding cavity (11), characterized in that: The outer wall of the inner tank (9) is provided with a mounting groove (9a), and pin holes (9b) are arranged opposite to each other on both sides of the mounting groove (9a). A first hydraulic cylinder (2a) is fixedly connected to the side wall of the movable template (3), and a first piston rod (2a1) is provided on the first hydraulic cylinder (2a). The first piston rod (2a1) extends into the interior of the molding cavity (11) to form a pin hole (9b) on one side. A connecting plate (3a) is fixedly connected to the movable template (3), and a core pulling mechanism (6) is provided on the connecting plate (3a). The core pulling mechanism (6) includes a connecting plate (3a) and a core pulling mechanism (6). A second hydraulic cylinder (6a) fixedly connected to the connecting plate (3a), the second hydraulic cylinder (6a) is provided with a second piston rod (6b), the second piston rod (6b) is provided with a fixed slider (7), the slider (7) is provided with an inclined slide rail (7c) inside, the slide rail (7c) is provided with a top block (8) slidably connected, one side of the top block (8) is provided with a forming portion (8a), the forming portion (8a) is arranged inside the forming cavity (11) for forming a pin hole (9b) on the other side, and the slide rail (7c) is inclined toward a side away from the forming portion (8a).

2. The slider core-pulling demoulding mechanism of the tail box liner injection mold according to claim 1 is characterized in that: A first limit block (7a) is provided inside the sliding block (7), the first limit block (7a) is arranged in the middle section of the sliding rail (7c) and protrudes upwards, and a guide portion (8b) is provided at the bottom of the top block (8), the guide portion (8b) is arranged inside the sliding rail (7c) and can abut against the first limit block (7a).

3. The slider core-pulling demoulding mechanism of the tail box liner injection mold according to claim 2 is characterized in that: A second limiting block (7b) is provided at one end of the slide rail (7c) close to the second piston rod (6b), and the guide portion (8b) reciprocates between the second limiting block (7b) and the first limiting block (7a).

4. The slider core-pulling demoulding mechanism of the tail box liner injection mold according to claim 3 is characterized in that: Two mounting grooves (9a) with the same structure are provided on the outer side wall of the inner container (9), and two core-pulling mechanisms (6) with the same structure are provided on the connecting plate (3a).

5. The slider core-pulling demoulding mechanism of the tail box liner injection mold according to claim 1, characterized in that: The top plate (1) is provided with a feed port (1a), the bottom of the feed port (1a) is provided with a feed channel (1b), and the feed channel (1b) is connected to a nozzle (1c) provided inside the fixed mold plate (2).

6. The slider core-pulling demoulding mechanism of the tail box liner injection mold according to claim 5, characterized in that: A plurality of connecting flow channels (3b) are provided at the inner bottom of the movable mold plate (3), the connecting flow channels (3b) are connected to the molding cavity (11), and the bottom of the nozzle (1c) is connected to the intersection of the connecting flow channels (3b).

7. The slider core-pulling demoulding mechanism of the tail box liner injection mold according to claim 1 is characterized in that: The push plate (4a) is provided with a plurality of fixedly connected straight ejector pins (4b), one end of which passes through the movable mold plate (3) and extends to the bottom of the molding cavity (11), and the bottom of the fixed mold plate (2) and the foot plate (4) is provided with a plurality of supporting feet (10).

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