An integrated molding die for a threaded column and a plastic part and a process method thereof

Abstract

The present application relates to a kind of thread post and plastic piece integrated forming die and its process method, solve the existing thread post and thermosetting plastic piece integrated forming operation cumbersome, time-consuming and laborious, low work efficiency Problem.It includes upper die set and lower die set, when integrated forming, first the thread post positioning through-hole of thread post fixing plate is coated with soft coating, then the thread post is inserted into the thread post positioning through-hole on the thread post fixing plate, the end of thread post close to plastic piece protrudes to the outside of thread post positioning through-hole, then the die except the material pressing rod is closed, the thread post is inserted into the product cavity on cavity plate, the thread post is sealedly connected with the inlet of thread post positioning through-hole, then the weighed plastic raw material is poured into the material tank in charging chamber, the raw material is pressed into product cavity, then cooled, finally the die is opened, the thread post and plastic integrated product is taken out, without paper cutting, paper winding and paper stripping process, save manpower and material resources, work efficiency is high.

Description

Technical Field

[0001] This invention relates to an integral molding mold for a threaded column and a plastic part, and the process method thereof. Background Technology

[0002] The original production process for this thermosetting mold involved the operator manually cutting paper into suitable small pieces, then evenly wrapping the paper around the outer surface of the threaded part. The rolled paper screw was then inserted into the circular core hole, and the depth was adjusted using a 0.15mm feeler gauge and an adjusting screw behind the steel sleeve. The adjusted core was then installed into the molding die for injection molding. The molded parts were then removed one by one from the steel sleeve, and finally, the paper wrapped around the surface of the parts was peeled off. This complete production cycle—cutting, rolling, and peeling—took 30 minutes, making the operation cumbersome, time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of cumbersome, time-consuming, labor-intensive, and inefficient operation of the existing integral molding of threaded columns and thermosetting plastic parts.

[0004] The technical solution adopted to solve the technical problem proposed in this invention is as follows: The integral molding mold of the threaded column and the plastic part of this invention includes an upper mold assembly and a lower mold assembly. The lower mold assembly includes a base plate, a cavity fixing plate and a cavity plate disposed on the base plate. The cavity plate is provided with a product cavity for plastic injection molding. The upper mold assembly includes, from bottom to top, a threaded column fixing plate, a feeding plate, a feeding chamber and a pressure rod. The threaded column fixing plate is provided with a threaded column positioning through hole for placing the threaded column. The inner side of the threaded column positioning through hole is provided with a soft coating. The threaded column is sealed and connected to the entrance of the threaded column positioning through hole. The threaded column positioning through hole is set corresponding to the product cavity. The feeding plate is provided with a guide channel. The guide channel communicates with the product cavity through the feeding channel disposed on the threaded column fixing plate. The feeding chamber is provided with a material receiving groove. The bottom of the material receiving groove is provided with a discharge hole communicating with the guide channel. The pressure rod is slidably engaged with the material receiving groove.

[0005] A process method for integrally molding a threaded column and a plastic part using the mold described in this invention includes the following steps:

[0006] A: Apply a soft coating to the inside of the threaded column positioning through hole of the threaded column fixing plate;

[0007] B: Insert the threaded post into the threaded post positioning through hole on the threaded post fixing plate, with the end of the threaded post near the plastic part protruding out of the threaded post positioning through hole;

[0008] C: Close the mold except for the pressure bar, insert the threaded column into the product cavity on the cavity plate, and seal the threaded column with the entrance of the threaded column positioning through hole;

[0009] D: Pour the weighed plastic raw material into the material tank in the feeding chamber, press the raw material into the product cavity, and then cool it.

[0010] F: Open the mold and remove the threaded column and the product that is integrally molded with plastic.

[0011] The technical solutions that further define the present invention include:

[0012] The cavity fixing plate is provided with positioning posts, and the cavity plate, threaded post fixing plate and feed plate are all provided with positioning holes that cooperate with the positioning posts.

[0013] The mold also includes an upper demolding template and a lower demolding template. The lower demolding template is provided with a lower demolding column. The base plate, cavity fixing plate, and cavity plate are provided with a first demolding through hole that slides with the lower demolding column. During demolding, the lower demolding column abuts against the threaded column fixing plate. The upper demolding template is provided with an upper demolding column. The threaded column fixing plate, feed plate, and cavity plate are all provided with a second demolding through hole that slides with the upper demolding column.

[0014] The feed plate is provided with countersunk holes corresponding to the threaded posts.

[0015] The portion of the threaded post that connects to the plastic is equipped with a nut.

[0016] The soft coating is a soft adhesive layer.

[0017] In step A, the part of the threaded post that is joined to the plastic has a nut.

[0018] In step F, when disassembling the mold, the first demolding through hole of the mold is inserted into the lower demolding column of the lower demolding template, and then the upper demolding column of the upper demolding template is inserted into the second demolding through hole. The lower demolding column abuts against the threaded column fixing plate. The upper demolding template is then tapped to separate the upper and lower mold groups and remove the product.

[0019] Through the above technical solution, the beneficial effects of the present invention are as follows: When the threaded column and the plastic part are integrally molded, a soft coating is first applied to the threaded column positioning through hole of the threaded column fixing plate, and then the threaded column is inserted into the threaded column positioning through hole of the threaded column fixing plate. The end of the threaded column near the plastic part protrudes outside the threaded column positioning through hole. Then, the mold except for the pressure rod is closed, and the threaded column is inserted into the product cavity on the cavity plate. The threaded column and the entrance of the threaded column positioning through hole are sealed and connected. Then, the weighed plastic raw material is poured into the material tank in the feeding chamber. After the raw material is pressed into the product cavity and cooled, the mold is opened and the product integrally molded with the threaded column and plastic is taken out. There is no paper cutting, paper rolling, or paper peeling process, which saves manpower and material resources and has high work efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of an integral molding mold for a threaded column and a plastic part according to the present invention.

[0021] Figure 2 This is an exploded structural diagram of an integral molding mold for a threaded column and a plastic part according to the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of an integral molding mold for a threaded column and a plastic part, cut from the center feed point.

[0023] Figure 4 This is a schematic diagram of the structure of an integral molding mold for a threaded column and a plastic part, cut from the product cavity.

[0024] Figure 5 This is a schematic diagram of the demolding structure of an integral molding mold for a threaded column and a plastic part according to the present invention. Detailed Implementation

[0025] The structure of the present invention will be further described below with reference to the accompanying drawings.

[0026] Reference Figures 1 to 5An integral molding mold for a threaded column and a plastic part includes an upper mold assembly 1 and a lower mold assembly 2. The lower mold assembly 2 includes a base plate 21, a cavity fixing plate 22 disposed on the base plate, and a cavity plate 23. The cavity plate 23 is provided with a product cavity 231 for plastic injection molding. The upper mold assembly 1 includes, from bottom to top, a threaded column fixing plate 11, a feed plate 12, a feeding chamber 13, and a pressure rod 14. The threaded column fixing plate 11 is provided with a threaded column positioning through hole 111 for placing the threaded column 5. The inner side of the threaded column positioning through hole 111 is provided with a soft coating 112. The threaded column positioning through hole is set corresponding to the product cavity. The feed plate 12 is provided with a guide channel 121. The guide channel communicates with the product cavity through the feed channel 113 disposed on the threaded column fixing plate 11. The feeding chamber 13 is provided with a material receiving groove 131. The bottom of the material receiving groove is provided with a discharge hole communicating with the guide channel. The pressure rod is slidably engaged with the material receiving groove.

[0027] In this embodiment, the cavity fixing plate 22 is provided with positioning pins 221, and the cavity plate, threaded pin fixing plate, and feed plate are all provided with positioning holes that mate with the positioning pins. The cavity fixing plate is fixed to the base plate, and the cavity plate is positioned on the cavity fixing plate by the positioning pins. When the upper mold and the lower mold are assembled, the threaded pin fixing plate and the feed plate are positioned by the positioning pins to close the mold, thereby ensuring the accuracy of mold closing.

[0028] In this embodiment, the mold further includes an upper demolding template 3 and a lower demolding template 4. The lower demolding template 4 is provided with a lower demolding post 41. The base plate, cavity fixing plate, and cavity plate are provided with a first demolding through hole 42 that slides with the lower demolding post. During demolding, the lower demolding post abuts against the threaded post fixing plate. The upper demolding template 3 is provided with an upper demolding post 31. The threaded post fixing plate and the feed plate are both provided with a second demolding through hole 32 that slides with the upper demolding post. During demolding, the first demolding through hole of the mold is inserted into the lower demolding post of the lower demolding template, and then the upper demolding post of the upper demolding template is inserted into the second demolding through hole. The lower demolding post abuts against the threaded post fixing plate. By tapping the upper demolding template, the upper mold assembly and the lower mold assembly are separated, and the product can be removed.

[0029] In this embodiment, the feed plate 12 is provided with countersunk holes 122 corresponding to the threaded post. This facilitates the demolding of the threaded post.

[0030] In this embodiment, the soft coating is a soft adhesive layer. The soft adhesive layer can prevent damage to the threads of the threaded post.

[0031] A process method for integrally molding a threaded column and a plastic part using the mold described in this invention includes the following steps:

[0032] A: Apply a soft coating to the threaded post positioning through-hole of the threaded post fixing plate. In this embodiment, the part where the threaded post connects to the plastic has a nut. This makes the connection between the nut and the plastic more secure.

[0033] B: Insert the threaded post into the threaded post positioning through hole on the threaded post fixing plate, with the end of the threaded post near the plastic part protruding outside the threaded post positioning through hole.

[0034] C: Close the mold except for the pressure rod, insert the threaded column into the product cavity on the cavity plate, and seal the threaded column with the entrance of the threaded column positioning through hole.

[0035] D: Pour the weighed plastic raw material into the material tank in the feeding chamber, press the raw material into the product cavity, and then cool it.

[0036] F: Open the mold and remove the threaded column and the product that is integrally molded with plastic.

[0037] In this embodiment, during demolding, the first demolding through hole of the mold is inserted into the lower demolding column of the lower demolding template, and then the upper demolding column of the upper demolding template is inserted into the second demolding through hole. The lower demolding column abuts against the threaded column fixing plate. By tapping the upper demolding template, the upper and lower mold groups are separated, and the product is taken out.

[0038] Although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of the present invention. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of the present invention.

Claims

1. An integral molding mold for a threaded column and a plastic part, comprising an upper mold assembly and a lower mold assembly, wherein the lower mold assembly comprises a base plate, a cavity fixing plate disposed on the base plate, and a cavity plate, wherein the cavity plate is provided with a product cavity for plastic injection molding, characterized in that: The upper module comprises, from bottom to top, a threaded column fixing plate, a feeding plate, a feeding chamber, and a pressure rod. The threaded column fixing plate has a threaded column positioning through hole for placing the threaded column. The inner side of the threaded column positioning through hole is coated with a soft coating, which is a soft adhesive layer. The threaded column positioning through hole is set to correspond to the product cavity. The threaded column and the inlet of the threaded column positioning through hole are sealed together. The feeding plate has a guide channel, which communicates with the product cavity through the feeding channel on the threaded column fixing plate. The feeding chamber has a material receiving groove, and the bottom of the material receiving groove has a discharge hole that communicates with the guide channel. The pressure rod is slidably engaged with the material receiving groove.

2. The integral molding mold for a threaded column and a plastic part as described in claim 1, characterized in that: The cavity fixing plate is provided with positioning posts, and the cavity plate, threaded post fixing plate and feed plate are all provided with positioning holes that cooperate with the positioning posts.

3. The integral molding mold for a threaded column and a plastic part as described in claim 1, characterized in that: The mold also includes an upper demolding template and a lower demolding template. The lower demolding template is provided with a lower demolding column. The base plate, cavity fixing plate and cavity plate are provided with a first demolding through hole that slides with the lower demolding column. During demolding, the lower demolding column abuts against the threaded column fixing plate. The upper demolding template is provided with an upper demolding column. The threaded column fixing plate and the feed plate are both provided with a second demolding through hole that slides with the upper demolding column.

4. The integral molding mold for a threaded column and a plastic part as described in claim 1, characterized in that: The feed plate is provided with countersunk holes corresponding to the threaded posts.

5. The integral molding mold for a threaded column and a plastic part as described in claim 1, characterized in that: The soft coating is a soft adhesive layer.

6. A process method for integrally molding a threaded column and a plastic part using the mold described in any one of claims 1-5, characterized in that: The steps include the following: A: Apply a soft coating to the inside of the threaded column positioning through hole of the threaded column fixing plate; B: Insert the threaded post into the threaded post positioning through hole on the threaded post fixing plate, with the end of the threaded post near the plastic part protruding out of the threaded post positioning through hole; C: Close the mold except for the pressure bar, insert the threaded column into the product cavity on the cavity plate, and seal the threaded column with the entrance of the threaded column positioning through hole; D: Pour the weighed plastic raw material into the material tank in the feeding chamber, press the raw material into the chamber and then cool it; F: Open the mold and remove the threaded column and the product that is integrally molded with plastic.

7. The process method for integrally molding a threaded column and a plastic part as described in claim 6, characterized in that: In step A, the part of the threaded post that is joined to the plastic has a nut.

8. The process method for integrally molding a threaded post and a plastic part as described in claim 6, characterized in that: In step F, when disassembling the mold, the first demolding through hole of the mold is inserted into the lower demolding column of the lower demolding template, and then the upper demolding column of the upper demolding template is inserted into the second demolding through hole. The lower demolding column abuts against the threaded column fixing plate. The upper demolding template is then tapped to separate the upper and lower mold groups and remove the product.

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