A paper pulp molded article trimming apparatus

Abstract

The application provides a paper pulp molded product trimming device, which comprises a machine table, an upper mold assembly and a lower mold assembly installed on the machine table, the upper mold assembly can move up and down relative to the lower mold assembly, so as to trim the sample placed on the lower mold assembly or reset the sample after trimming; the lower mold assembly comprises a lower mold base plate, a lower mold fixed plate, a lower mold movable plate and a lower mold cutter head; the lower mold base plate is installed on the machine table, the lower mold fixed plate is installed on the lower mold base plate, the lower mold movable plate is connected above the lower mold fixed plate through a first elastic body, the lower mold movable plate is provided with a through cavity, the lower mold fixed plate is provided with a mounting groove, and the lower mold cutter head is installed in the mounting groove through the through cavity. According to the scheme of the application, the deburring operation can be sequentially completed after the trimming operation is completed, without additional manual operation and equipment replacement, so that the production efficiency is improved and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of molding technology, specifically to a cutting device for molded pulp products. Background Technology

[0002] Burrs are inevitably produced after the trimming process of pulp molded products, but the trimming equipment generally lacks the function of simultaneously removing these burrs. If burrs are not effectively removed, they will affect the appearance and usability of the product. Therefore, for pulp molded products with strict appearance quality requirements, burr treatment is necessary. Current technologies typically require manual repair or further processing using specialized deburring equipment, which increases production costs and reduces production efficiency. Therefore, improvements are needed to the existing trimming equipment for pulp molded products. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cutting device for pulp molded products.

[0004] To achieve the above and other objectives, the present invention is implemented through the following technical solution: A pulp molding product trimming device is provided, comprising a machine base, and an upper mold assembly and a lower mold assembly mounted on the machine base. The upper mold assembly is capable of moving downward relative to the lower mold assembly to trim the sample to be trimmed placed on the lower mold assembly. The upper mold assembly is capable of moving upward relative to the lower mold assembly to trim the sample and then resetting. The upper mold assembly includes an upper mold mounting plate, an upper mold cutter head, and a pressure plate. The upper mold mounting plate is mounted on the machine base, and the upper mold cutter head and the pressure plate are both mounted on the lower end face of the upper mold mounting plate. The upper mold cutter head has a cutting edge penetrating the upper mold cutter head, and at least a portion of the pressure plate passes downward through the cutting edge. The lower mold... The assembly includes a lower mold base plate, a lower mold fixed plate, a lower mold moving plate, and a lower mold cutter head. The lower mold base plate is mounted on the machine base, the lower mold fixed plate is mounted on the lower mold base plate, the lower mold moving plate is connected above the lower mold fixed plate via a first elastic body, the lower mold moving plate has a through cavity, the lower mold fixed plate has a corresponding mounting groove, and the lower mold cutter head passes through the through cavity and is mounted in the mounting groove. The upper mold assembly moves downward until the upper mold cutter head and the lower mold cutter head close together to trim the edges of the pulp molded product. The lower mold moving plate is pressed downward. After trimming, the lower mold moving plate moves upward by the elastic restoring force of the first elastic body. The inner edge of the upper end of the through cavity is pressed against the outer edge of the upper end of the lower mold cutter head to remove burrs.

[0005] Furthermore, the lower mold assembly also includes a first guide post, the lower mold fixed plate is provided with a first guide hole penetrating the lower mold fixed plate, the lower mold moving plate is correspondingly provided with a second guide hole, the first guide post passes through the first guide hole from bottom to top and then enters the second guide hole, the first guide post is lower than the top of the second guide hole.

[0006] Furthermore, an annular step is provided at the lower end of the first guide hole, and an annular stop is provided at the lower end of the first guide post. After the first guide post passes through the first guide hole from bottom to top, the annular stop stops within the annular step.

[0007] Furthermore, the lower mold fixed plate is provided with a first receiving hole on the end face adjacent to the lower mold moving plate, and the lower mold moving plate is provided with a corresponding second receiving hole. One end of the first elastic body is connected to the first receiving hole, and the other end is connected to the second receiving hole.

[0008] Furthermore, there are at least two first guide posts.

[0009] Furthermore, there are at least two first elastomers.

[0010] Furthermore, the first elastic body is a spring.

[0011] Furthermore, the lower mold assembly also includes a lower mold support plate, which is mounted on the lower mold base plate. The lower mold fixed plate is mounted on the lower mold support plate. A second guide post is provided on the lower mold support plate. The upper mold assembly is sleeved on the second guide post and moves up and down relative to the lower mold assembly along the second guide post.

[0012] Furthermore, a limit post is provided on the lower mold support plate, and the upper mold assembly abuts against the limit post during its downward movement.

[0013] Furthermore, the upper mold assembly also includes an upper mold support plate, which is connected to the lower end face of the upper mold mounting plate, the upper mold cutter head is connected to the lower end face of the upper mold support plate, and the pressure plate is connected to the lower end face of the upper mold support plate through a second elastic body.

[0014] The present invention improves the structure of the pulp molding product trimming equipment, allowing for the deburring operation to be completed immediately after trimming, eliminating the need for additional manual operation or equipment replacement. This improves production efficiency and reduces costs. Attached Figure Description

[0015] Figure 1 The diagram shown is an overall structural diagram of the pulp molding product trimming equipment of the present invention.

[0016] Figure 2 The diagram shown is an exploded view of the lower die cutter head, lower die fixed plate, and lower die moving plate of the present invention.

[0017] Figure 3 The diagram shows the connection structure of the lower mold fixed plate and the lower mold moving plate of the present invention.

[0018] Figure 4 Displayed as Figure 3 Schematic diagram of the AA section.

[0019] Figure 5 The image shown is a side view of the upper mold assembly of this invention.

[0020] Figure 6 Displayed as Figure 5 Schematic diagram of the cross-section of BB.

[0021] Figure 7 The diagram shown is an exploded view of the upper mold assembly of this invention.

[0022] Figure 8 The diagram shown is a schematic diagram of the upper die cutter head structure of the present invention. Detailed Implementation

[0023] Please see Figures 1 to 8 The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be understood that many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figure 1 The diagram shows the overall structure of the pulp molding product trimming device 100 of the present invention, including a machine base (not shown), an upper mold assembly 10, and a lower mold assembly 11, both mounted on the machine base. The upper mold assembly 10 can move downward relative to the lower mold assembly 11 to trim the sample to be trimmed placed on the lower mold assembly 11. The upper mold assembly 10 can move upward relative to the lower mold assembly 11 to trim the sample and then return to its original position. A driving device (not shown), such as a cylinder or a gas spring, can be provided on the machine base. The driving device is connected to the upper mold assembly 10 and drives the upper mold assembly 10 to move in the vertical direction. When the upper mold assembly 10 moves downward, it trims the sample to be trimmed placed on the lower mold assembly 11. After the trimming operation is completed, the upper mold assembly 10 moves upward and returns to its original position under the drive of the driving device.

[0025] like Figure 7 As shown, the upper mold assembly 10 includes an upper mold mounting plate 101, an upper mold cutter head 102, and a pressure plate 103. The upper mold mounting plate 101 is mounted on the machine base, and both the upper mold cutter head 102 and the pressure plate 103 are mounted on the lower end face of the upper mold mounting plate 101. The upper mold cutter head 102 has a cutting edge 1021 that penetrates through it. At least a portion of the pressure plate 103 passes downward through the cutting edge 1021. The shape of the cutting edge 1021 is designed according to the shape of the sample to be cut, and the periphery of the cutting edge 1021 is relatively sharp for cutting the sample. At least a portion of the pressure plate 103 passes downward through the cutting edge 1021, meaning that at least a portion of the pressure plate 103 extends downward through the cutting edge 1021 and is positioned below it. During the trimming process, as the upper mold assembly 10 moves downward, at least a portion of the pressure plate 103 first contacts the sample to be trimmed and presses it firmly. The upper mold assembly 10 then continues to move downward through the cutting edge 1021 to trim the sample. Because the sample to be trimmed is already pressed and fixed by the pressure plate 103, its position will not shift during the trimming process, thus ensuring the trimming effect.

[0026] The lower mold assembly 11 includes a lower mold base plate 111, a lower mold fixed plate 112, a lower mold moving plate 113, and a lower mold cutter head 114. The lower mold base plate 111 is mounted on the machine base, and the lower mold fixed plate 112 is mounted on the upper surface of the lower mold base plate 111. Figure 2 The lower mold moving plate 113 is connected above the lower mold fixed plate 112 via a first elastic body 115. The first elastic body 115 is deformable. When the upper mold assembly 10 moves downward and closes with the lower mold assembly 11 for edge cutting, it will press the lower mold moving plate 113 downward. After being pressed, the lower mold moving plate 113 compresses the first elastic body 115, and thus moves downward a certain distance relative to the lower mold cutter head 114. The lower mold moving plate 113 is provided with a through cavity 1131 penetrating the lower mold moving plate 113. The lower mold fixed plate 112 is provided with a mounting groove 1121 at a position corresponding to the through cavity 1131. The lower mold cutter head 114 passes through the through cavity 1131 and is installed in the mounting groove 1121.

[0027] The specific workflow of the pulp molding product trimming equipment can be as follows: When trimming is required, the upper mold assembly 10 moves downward. During the descent, the pressure plate 103 first presses down on the sample to be trimmed. The upper mold assembly 10 continues to move downward until the upper mold cutter head 102 and the lower mold cutter head 114 close together for trimming. When the upper mold assembly 10 moves downward until the upper mold cutter head 102 and the lower mold cutter head 114 close together for trimming, the upper mold assembly 10 will press down on the lower mold moving plate 113. After being pressed, the lower mold moving plate 113 compresses the first elastic body 115 and then moves downward a certain distance relative to the lower mold cutter head 114. After trimming is completed, the upper mold assembly 10 moves upward, and the lower mold moving plate 113 moves upward rapidly under the elastic restoring force of the first elastic body 115. During the resetting process of the lower mold moving plate 113, the inner edge of the upper end of the through cavity 1131 will press against the outer edge of the upper end of the lower mold cutter head 114, thereby squeezing out the burrs generated after trimming. When the lower mold moving plate 113 is fully reset upwards, the inner edge of the upper end of the through cavity 1131 is higher than the outer edge of the upper end of the lower mold cutter head 114, for example, the inner edge of the upper end of the through cavity 1131 is higher than the outer edge of the upper end of the lower mold cutter head 114 by 1mm-3mm, to ensure that during the resetting process of the lower mold moving plate 113, the inner edge of the upper end of the through cavity 1131 will definitely press against the outer edge of the upper end of the lower mold cutter head 114 to squeeze out the burrs. Through the solution of the present invention, the structure of the pulp molding product trimming equipment has been improved. After the trimming operation is completed, the burr removal operation can be completed successively without additional manual operation or equipment replacement. Therefore, production efficiency is improved and costs are reduced.

[0028] Since the lower mold moving plate 113 and the lower mold stationary plate 112 are only connected by the first elastic body 115, the lower mold moving plate 113 may wobble during downward or upward movement, resulting in poor stability and affecting the burr removal effect. Therefore, as Figure 2 As shown, the lower mold assembly 11 also includes a first guide post 116, combined with... Figure 4 The lower mold fixed plate 112 is provided with a first guide hole 1122, and the lower mold moving plate 113 is correspondingly provided with a second guide hole 1132. The first guide post 116 passes through the first guide hole 1122 from bottom to top and then enters the second guide hole 1132. The first guide post 116 is lower than the top surface of the second guide hole 1132. Because of the first guide post 116, the lower mold moving plate 113 can move up and down along the first guide post 116, avoiding wobbling. In addition, because the first guide post 116 is lower than the top surface of the second guide hole 1132, the first guide post 116 will not interfere with the cutting operation of the upper mold assembly 10.

[0029] As a preferred embodiment, such as Figure 4 As shown, a first annular step 1122A is provided at the lower end of the first guide hole, and a first annular stop portion 1161 is provided at the lower end of the first guide post 116. When the first guide post 116 passes through the first guide hole 1122 from bottom to top, the first annular stop portion 1161 stops within the first annular step 1122A, that is, the first annular stop portion 1161 is completely accommodated within the first annular step 1122A. This arrangement can both position the first guide post 116 and not affect the connection between the lower mold plate 112 and the lower mold base plate 111.

[0030] To achieve a more stable movement of the lower mold moving plate 113, at least two first guide posts 116 are provided. In this embodiment, four first guide posts 116 are provided, distributed at the four corners between the lower mold moving plate 113 and the lower mold stationary plate 112.

[0031] like Figure 4 The diagram illustrates the specific connection method of the first elastic body 115 between the lower mold fixed plate 112 and the lower mold movable plate 113. The lower mold fixed plate 112 has a first receiving hole 1123 on its end face adjacent to the lower mold movable plate 113, and the lower mold movable plate 113 has a second receiving hole 1133 at a corresponding position on its end face adjacent to the lower mold fixed plate 112. One end of the first elastic body 115 is connected to the first receiving hole 1123, and the other end is connected to the second receiving hole 1133. To ensure the stability of the lower mold movable plate 113 during compression and rebound, at least two first elastic bodies 115 are used. In this embodiment, four first elastic bodies 115 are used, distributed at the four corners between the lower mold movable plate 113 and the lower mold fixed plate 112.

[0032] Preferably, the first elastic body 115 is a spring. Of course, it can also be any other elastic element that can achieve the same technical effect, such as a torsion spring.

[0033] The lower mold assembly 11 further includes a lower mold support plate 117, which is mounted on the lower mold base plate 111. The lower mold fixed plate 112 is mounted on the lower mold support plate 117. A second guide post 1171 is provided on the lower mold support plate 117. The upper mold assembly 10 is sleeved on the second guide post 1171. The upper mold assembly 10 moves up and down relative to the lower mold assembly 11 along the second guide post 1171, thereby ensuring the stability of the upper mold assembly 10 during the up and down movement.

[0034] In addition, the lower mold support plate 117 is also provided with a limit post 1172. When the upper mold assembly 10 moves downward, it will abut against the limit post 1172 to limit the downward stroke of the upper mold assembly 10 and ensure the cutting effect.

[0035] In this embodiment, the upper mold assembly 10 further includes an upper mold support plate 104, which is connected to the lower end face of the upper mold mounting plate 101. The upper mold cutter head is connected to the lower end face of the upper mold support plate, and the pressure plate 103 is connected to the lower end face of the upper mold support plate 104 via a second elastic body (not shown in the figure). Specifically... Figure 6 As shown, the lower end face of the upper mold support plate 104 is provided with a third receiving hole 1041, and the upper end face of the pressure plate 103 is provided with a fourth receiving hole 1031 at a corresponding position. One end of the second elastic body is connected to the third receiving hole 1041, and the other end is connected to the fourth receiving hole 1031. When the upper mold assembly 10 moves downward, the pressure plate 103 first contacts the sample to be cut and presses it. As the upper mold assembly 10 continues to move downward, the second elastic body is compressed, and the upper mold cutter head 102 and the lower mold cutter head 114 close to achieve edge cutting. Preferably, the second elastic body is a spring.

[0036] To prevent the pressure plate 103 from wobbling during its up-and-down movement, a third guide post (not shown in the figure) is also provided. The upper mold support plate 104 is provided with a third guide hole 1042 penetrating through the upper mold support plate 104, and a fourth guide hole 1032 is provided at a corresponding position on the upper end face of the pressure plate 103. The third guide post passes through the third guide hole 1042 from top to bottom and then enters the fourth guide hole 1032. The lower end of the third guide post is spaced apart from the bottom surface of the fourth guide hole 1032. Optionally, a second annular step 1042A can be provided at the top of the third guide hole 1042, and a second annular stop can be provided at the top of the third guide post. When the third guide post passes through the third guide hole 1042 from top to bottom, the second annular stop stops in the second annular step 1042A, that is, the second annular stop is completely accommodated in the second annular step 1042A, which not only achieves the positioning of the third guide post, but also does not affect the connection between the upper mold support plate 104 and the upper mold mounting plate 101.

[0037] In other embodiments, to ensure the secure installation of the upper mold assembly 10, the upper mold assembly 10 further includes an upper mold reinforcing plate 105, which is installed on the lower end face of the upper mold mounting plate 101, and the upper mold support plate 104 is connected to the lower end face of the upper mold reinforcing plate 105, that is, the upper mold reinforcing plate 105 is located between the upper mold mounting plate 101 and the upper mold support plate 104.

Claims

1. A paper pulp molded product edge trimming device, characterized in that, Includes a machine base, and an upper mold assembly and a lower mold assembly mounted on the machine base; The upper mold assembly includes an upper mold mounting plate, an upper mold cutter head, and a pressure plate. The upper mold mounting plate is mounted on the machine base. The upper mold cutter head and the pressure plate are both mounted on the lower end face of the upper mold mounting plate. The upper mold cutter head has a cutting edge that penetrates the upper mold cutter head. At least a portion of the pressure plate passes downward through the cutting edge. The lower mold assembly includes a lower mold base plate, a lower mold fixed plate, a lower mold moving plate, and a lower mold cutter head. The lower mold base plate is mounted on the machine base, the lower mold fixed plate is mounted on the lower mold base plate, the lower mold moving plate is connected above the lower mold fixed plate by a first elastic body, the lower mold moving plate has a through cavity penetrating the lower mold moving plate, the lower mold fixed plate has a corresponding mounting groove, and the lower mold cutter head passes through the through cavity and is mounted in the mounting groove. The upper mold assembly moves downward until the upper mold cutter head and the lower mold cutter head close together to trim the edges of the pulp molded product. The lower mold moving plate is squeezed downward. After trimming, the lower mold moving plate moves upward by the elastic restoring force of the first elastic body. The inner edge of the upper end of the cavity is squeezed against the outer edge of the upper end of the lower mold cutter head to remove burrs.

2. The paper pulp molding product trimming equipment according to claim 1, characterized in that, The lower mold assembly further includes a first guide post. The lower mold fixed plate is provided with a first guide hole that penetrates the lower mold fixed plate. The lower mold moving plate is provided with a corresponding second guide hole. The first guide post passes through the first guide hole from bottom to top and then enters the second guide hole. The first guide post is lower than the top surface of the second guide hole.

3. The paper pulp molding product edge trimming equipment according to claim 2, characterized in that, The lower end of the first guide hole is provided with an annular step, and the lower end of the first guide post is provided with an annular stop. After the first guide post passes through the first guide hole from bottom to top, the annular stop stops inside the annular step.

4. A paper pulp molding product edge trimming device according to any one of claims 1-3, characterized in that, The lower mold fixed plate has a first receiving hole on its end face adjacent to the lower mold moving plate, and the lower mold moving plate has a corresponding second receiving hole. One end of the first elastic body is connected to the first receiving hole, and the other end is connected to the second receiving hole.

5. The paper pulp molding product edge trimming equipment according to claim 2, characterized in that, There are at least two first guide posts.

6. The paper pulp molding product trimming equipment according to claim 4, characterized in that, There are at least two first elastomers.

7. The paper pulp molded product trimming equipment according to claim 6, characterized in that, The first elastic body is a spring.

8. The paper pulp molding product trimming equipment according to claim 7, characterized in that, The lower mold assembly further includes a lower mold support plate, which is mounted on the lower mold base plate. The lower mold fixed plate is mounted on the lower mold support plate. A second guide post is provided on the lower mold support plate. The upper mold assembly is sleeved on the second guide post and moves up and down relative to the lower mold assembly along the second guide post.

9. The edge-cutting equipment for pulp molded products according to claim 8, characterized in that, The lower mold support plate is provided with a limit post, and the upper mold assembly abuts against the limit post during its downward movement.

10. The paper pulp molding product trimming equipment according to claim 1, characterized in that, The upper mold assembly also includes an upper mold support plate, which is connected to the lower end face of the upper mold mounting plate. The upper mold cutter head is connected to the lower end face of the upper mold support plate, and the pressure plate is connected to the lower end face of the upper mold support plate through a second elastic body.

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