Paper-plastic mold

Abstract

The invention discloses a paper-plastic mold which is used for forming and trimming a paper-plastic product and comprises an upper mold assembly, a lower mold assembly and a lower mold assembly, the upper mold assembly comprises a forming part and a trimming part, the forming part is sleeved with the trimming part, the forming part is used for forming the paper-plastic product, and the trimming part is used for trimming the paper-plastic product; and the lower die assembly and the upper die assembly are correspondingly arranged, the lower die assembly comprises a forming cavity, and the shape structure of the forming cavity is matched with the shape structure of the forming part. According to the invention, the two processes of hot press molding and trimming can be completed by only one mold, the occupied area is reduced, the production cost is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pulp molded product production equipment, in particular to a pulp mold. Background Art

[0002] Paper-plastic products made of annual herbaceous plant fibers as the main raw materials meet the hygienic, convenient, fast and healthy living needs of modern society. They are practical, non-toxic, and can be completely degraded and returned to nature after being discarded. They have broad development prospects. Therefore, the pulp molding industry is an environmentally friendly industry that is conducive to the sustainable development of social economy. There is huge consumer demand and broad growth space both domestically and internationally. my country's pulp molding industry started in the 1980s and is still an emerging industry. There is still a lot of room for growth in terms of technology, structure, molds, materials, etc. Energy saving and consumption reduction should be an eternal topic of this century. How to reduce the unit energy consumption of pulp molding production will be huge and far-reaching for paper molding production enterprises in terms of both corporate economic benefits and social benefits.

[0003] The manufacturing process of paper plastic products (short for pulp molding) is as follows: the pulp is passed through a paper plastic molding machine, and processed into paper plastic through vacuum molding and hot pressing curing. After drying and shaping, the processed paper plastic products are heated, dried, shaped, cut, trimmed, and surface finished to form food-grade disposable utensils. Among them, hot pressing and curing to form paper plastic requires the use of hot pressing molding molds; cutting and trimming requires the use of trimming molds, and the trimming molds and hot pressing molds are two different molds.

[0004] The hot pressing curing and cutting and trimming of paper plastic products use two different molds (trimming mold and hot pressing mold), and hot pressing molding and cutting and trimming need to be carried out in two steps. The setting of two molds increases the occupation of site space and increases the production input cost. In the two-step process, a robot is needed for transfer, which reduces production efficiency.

[0005] Therefore, it is necessary to provide a paper plastic mold to solve the above problems existing in the prior art. Summary of the invention

[0006] The object of the present invention is to provide a paper-plastic mold, which can complete two processes of hot pressing and trimming with only one mold, thereby reducing the floor space, saving production costs and improving production efficiency.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] A paper-plastic mold, used for molding and trimming paper-plastic products, comprising:

[0009] The upper mold assembly comprises a molding part and a trimming part, wherein the trimming part is sleeved outside the molding part, the molding part is used for molding the paper-molded product, and the trimming part is used for trimming the paper-molded product;

[0010] A lower mold assembly is arranged corresponding to the upper mold assembly, and the lower mold assembly includes a molding cavity, and the shape structure of the molding cavity is adapted to the shape structure of the molding portion.

[0011] Furthermore, the upper mold assembly also includes an upper base, and the forming portion and the trimming portion are arranged on the upper base.

[0012] Furthermore, the upper base is provided with a mounting groove matched with the shape and structure of the forming part, and the mounting groove and the forming part are detachably connected.

[0013] Furthermore, a slot matching the shape and structure of the trimming portion is provided on the upper base, the slot is located at the periphery of the forming portion, and the trimming portion is snapped into the slot.

[0014] Furthermore, the lower mold assembly also includes a lower base, which forms a cavity for accommodating the molding cavity, and the molding cavity and the cavity are detachably connected.

[0015] Furthermore, the forming portion is a bowl-shaped structure.

[0016] Furthermore, the trimming portion is an annular structure.

[0017] Furthermore, the trimming portion includes a cutting knife.

[0018] Furthermore, the size of the trimming portion is larger than the standard size of the paper-plastic product.

[0019] Furthermore, an air passage is provided on the lower base.

[0020] It can be seen from the above technical scheme that the present invention, by designing the upper mold assembly and the lower mold assembly, can complete the two different complex process steps of hot pressing and trimming with only one set of molds, thereby reducing the occupancy of site space, reducing process steps, saving production costs, and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a paper-plastic mold according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of an upper mold component of a paper-plastic mold according to an embodiment of the present invention;

[0023] Figure 3This is a schematic diagram of a lower mold component of a paper-plastic mold according to an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of a trimming portion of a paper-plastic mold according to an embodiment of the present invention;

[0025] Figure 5 for Figure 1 Cross-sectional view along AA direction;

[0026] Figure 6 for Figure 5 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0028] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-Figure 6 As shown, an embodiment of the present invention provides a paper-molding mold for molding and trimming paper-molding products, comprising: an upper mold assembly 1 and a lower mold assembly 2. The upper mold assembly 1 and the lower mold assembly 2 are arranged correspondingly, and when the upper mold assembly 1 moves to fit the lower mold assembly 2, the paper-molding product is subjected to two process steps of hot pressing molding and trimming.

[0030] The upper mold assembly 1 includes a molding part 12 and a trimming part 13. The trimming part 13 is sleeved outside the molding part 12. That is, the trimming part 13 is arranged along the periphery of the molding part 12, so that the hot press molding process is completed and the trimming process step can be performed. The molding part 12 is used for hot press molding of paper plastic products. The trimming part 13 is used for trimming paper plastic products.

[0031] The lower mold assembly 2 includes a molding cavity 22. The shape and structure of the molding cavity 22 are adapted to the shape and structure of the molding portion 12, so that the wet embryo of the paper-plastic product is hot-pressed into a preset shape through the cooperation of the molding portion 12 and the molding cavity 22. The size of the molding cavity 22 is smaller than the paper-plastic product to be trimmed.

[0032] like Figure 2 As shown, in some embodiments of the present invention, the upper mold assembly 1 further includes an upper base 11, which serves as a carrier for the molding part 12 and the trimming part 13 and as a connector connected to other devices. The molding part 12 and the trimming part 13 are arranged on the upper base 11. That is, the hot pressing molding mold and the trimming mold are integrated into the same mold, and there is no need to transfer them with a robot, which saves production time.

[0033] like Figure 2 As shown, in some embodiments of the present invention, the upper base 11 is provided with a mounting groove that matches the shape and structure of the forming part 12. The mounting groove and the forming part 12 are detachably connected. Thus, the forming part 12 can be replaced at will, which facilitates the installation and removal of the forming part 12 with different preset shapes. This assembly method is convenient and fast.

[0034] like Figure 2 As shown, in some embodiments of the present invention, the upper base 11 is provided with a slot that matches the shape and structure of the trimming portion 13. The slot is located at the periphery of the forming portion 12, and the trimming portion 13 is snapped into the slot. This snap-in method is more convenient and efficient.

[0035] like Figure 3 As shown, in some embodiments of the present invention, the lower mold assembly 2 further includes a lower base 21. The lower base 21 forms a cavity for accommodating the molding cavity 22, and the molding cavity 22 and the cavity are detachably connected. That is, the molding cavity 22 is placed in the cavity and fixedly connected to the lower base 21.

[0036] like Figure 2 and Figure 5 As shown, in some embodiments of the present invention, the forming portion 12 is a bowl-shaped structure. The shape structure of the forming portion 12 is not limited to the bowl-shaped structure, and any preset shape of the forming portion 12 can be performed according to specific circumstances.

[0037] like Figure 4 As shown, in some embodiments of the present invention, the trimming portion 13 is an annular structure. The trimming portion 13 of the annular structure is convenient for being sleeved on the periphery of the forming portion 12 of the bowl-shaped structure. The trimming portion 13 of the annular structure is made of metal. The shape structure of the trimming portion 13 is not limited to the annular structure, and can be specifically set according to the preset shape of the forming portion 12.

[0038] In some other embodiments of the present invention, the trimming unit 13 includes a cutting knife for trimming the paper-plastic product, but the trimming unit 13 is not limited to a cutting knife.

[0039] In some embodiments of the present invention, the size of the trimming portion 13 is larger than the standard size of the paper-plastic product, so that the paper-plastic product formed by hot pressing reaches the standard size of the paper-plastic product after trimming and cooling.

[0040] The size of the existing cutting knife is consistent with the standard size of paper and plastic products, so as to ensure that the cut paper and plastic products are of standard size. However, the size of the cutting knife in this process needs to be precisely controlled when preparing it. If the size deviation occurs during the preparation of the cutting knife, the standard size of the paper and plastic products cannot be cut. Therefore, the preparation of the cutting knife has high requirements and is relatively difficult.

[0041] In the actual use of the present invention, during the hot pressing molding process, the paper plastic product will have the situation of thermal expansion and contraction. If the paper plastic product is cut according to the standard size, the actual size of the paper plastic product after cooling will be smaller than the standard size. Therefore, the size of the trimming portion 13 should be larger than the standard size of the required paper plastic product, so as to ensure that the size of the paper plastic product after cutting is larger than the standard size, so that the paper molded product reaches the standard size after cooling and shrinking. In this way, the precision requirement of the trimming portion 13 during preparation can be reduced.

[0042] like Figure 5 As shown, in some embodiments of the present invention, an air channel 3 is further provided on the lower base 21. Therefore, the water vapor generated by the wet embryo product of the paper plastic product during the hot pressing forming process is discharged through the air channel 3, and the forming and drying effects are achieved at the same time.

[0043] like Figure 1-Figure 6 As shown, when the paper-plastic mold is working, a flat-plate-shaped paper-plastic product without a specific shape is obtained, and the flat-plate-shaped paper-plastic product is hot-pressed into a preset specific shape. The flat-plate-shaped paper-plastic product is placed between the upper mold assembly 1 and the lower mold assembly 2. Then the upper mold assembly 1 is driven downward to move, that is, the upper mold assembly 1 moves relative to the lower mold assembly 2, so as to achieve the mold closing of the upper mold assembly 1 and the lower mold assembly 2. When the mold is closed, the flat-plate-shaped paper-plastic product is hot-pressed into a paper-plastic product with the same shape as the molding part 12 through the cooperation of the molding part 12 and the molding cavity 22, that is, the flat-plate-shaped paper-plastic product is hot-pressed into a paper-plastic product with a preset shape. At the same time, the trimming part 13 moves downward with the upper mold assembly 1 to complete the cutting of the paper-plastic product hot-pressed into a preset shape, that is, to cut the edges and corners of the paper-plastic product outside the molding part 12. During the operation of the trimming unit 13, the lower blade of the trimming unit 13 abuts against the molding cavity 22 of the lower mold assembly 2, thereby cutting off the redundant edges and corners of the paper-plastic product of the preset shape. That is, after the wet embryo of the paper-plastic product is heated and pressed down to form, the paper-plastic product can be trimmed without using a robot to transfer the formed paper-plastic product. In this way, only one set of molds is needed to complete the molding and trimming of the preset shape of the paper-plastic product, thereby greatly improving the efficiency of producing paper-plastic products. Compared with the time of the existing molding and trimming processes performed separately, this process can save 10 seconds.

[0044] In summary, in the existing process, the paper-plastic product is first formed and then transferred to the trimming process by a robot, which consumes a lot of production time. The present invention simplifies the process steps into three steps of embryo copying-transferring-hot pressing molding and trimming by designing an upper mold assembly and a lower mold assembly. Only one set of molds is needed to complete the two different complex process steps of forming and trimming, thereby reducing the occupation of site space, reducing process steps, saving production costs, and greatly improving production efficiency.

[0045] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A paper plastic mold, used for molding and trimming paper plastic products. It is characterized in that include: The upper mold assembly comprises a molding part and a trimming part, wherein the trimming part is sleeved outside the molding part, the molding part is used for molding the paper-molded product, and the trimming part is used for trimming the paper-molded product; A lower mold assembly is arranged corresponding to the upper mold assembly, and the lower mold assembly includes a molding cavity, and the shape structure of the molding cavity is adapted to the shape structure of the molding portion.

2. The paper-plastic mold according to claim 1, It is characterized in that The upper mold assembly also includes an upper base, and the molding portion and the trimming portion are arranged on the upper base.

3. The paper-plastic mold according to claim 2, It is characterized in that The upper base is provided with a mounting groove matched with the shape and structure of the forming part, and the mounting groove and the forming part are detachably connected.

4. The paper-plastic mold according to claim 2, It is characterized in that The upper base is provided with a clamping groove matched with the shape structure of the trimming portion, the clamping groove is located at the periphery of the forming portion, and the trimming portion is clamped in the clamping groove.

5. The paper-plastic mold according to claim 1, It is characterized in that The lower mold assembly also includes a lower base, which forms a cavity for accommodating the molding cavity, and the molding cavity and the cavity are detachably connected.

6. The paper-plastic mold according to claim 1, It is characterized in that The forming portion is a bowl-shaped structure.

7. The paper-plastic mold according to claim 1, It is characterized in that The trimming portion is an annular structure.

8. The paper-plastic mold according to claim 1, It is characterized in that The trimming portion includes a cutting knife.

9. The paper-plastic mold according to claim 1, It is characterized in that The size of the trimming portion is larger than the standard size of the paper plastic product.

10. The paper-plastic mold according to claim 5, It is characterized in that An air passage is arranged on the lower base.

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