A DMC mold and processing method using petal-shaped threaded inserts

Abstract

The present invention discloses a DMC mold and a processing method using petal-shaped threaded inserts. The petal-shaped threaded inserts are passed through the insert in the front mold core and are clamped and contracted by an external force to generate an external tension to lock the petal-shaped threaded inserts. The structure is simple, similar to the shape of a blooming petal, with low processing costs and no limitations on the steel material. Only ordinary steel is required. By using the skills in the structure, during use, the petals can contract to form an elastic force to ensure no falling off, control the leakage of powder, no wear of the mold core, etc., without mold jamming phenomenon, control the expansion and wear of the inserts, and the product qualification rate is high, greatly reducing the cost and time of product production.

Description

Technical Field

[0001] The present invention belongs to the technical field of molds, and particularly relates to the design and use technology of a mold insert. Background Art

[0002] The BMC material contains a large amount of glass fiber and filler, and a lot of waste will be generated during molding, blocking the gaps between workpieces and the exhaust grooves. Especially when making an embedded insert, it is very easy for the material powder to leak, making it impossible to remove ordinary inserts, or sticking to the front mold together with the product and unable to be removed. When replacing the insert, due to the high hardness of the material itself, it causes great wear to the mold. Ordinary inserts will wear the mold core, and the mold needs to be repaired and the insert replaced frequently.

[0003] Currently, ordinary inserts cannot fix the front mold screws, are prone to falling off, material powder leakage, and mold core wear during installation, resulting in large waste losses. Traditional mold cores have wear, inaccurate mold core hole positions, and inconsistent hole sizes, which cause great trouble in assembling insert nuts. Some products will still be scrapped after partial rework due to too large dimensional differences, resulting in increased production costs. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention proposes a DMC mold and processing method using a petal-shaped threaded insert. To achieve the above object, the present invention adopts the following technical solutions.

[0005] The mold includes an upper template, a front template, a front mold core, a rear template, a rear mold core, a rear mold core threaded insert, a rear mold core insert sub, a petal-shaped threaded insert, and a front mold core insert sub.

[0006] The upper template is installed at the upper end of the front template, and the rear template is located directly below the front template.

[0007] The front mold core and the front mold core insert sub are installed inside the front template, and the rear mold core and the rear mold core insert sub are installed inside the rear template.

[0008] The bottom end of the petal-shaped threaded insert is installed inside the front mold core insert sub and serves as the part buried in the front mold core insert sub. The bottom end of the rear mold core threaded insert is installed inside the rear mold core insert sub and serves as the part buried in the rear mold core insert sub.

[0009] The upper and lower templates are closed to form a mold cavity, and the DMC product is formed inside the mold cavity.

[0010] Furthermore, the bottom end of the petal-shaped threaded insert is made of an elastic material. When not clamped by an external force, it opens into a petal shape, and when clamped by an external force, it contracts into a cylindrical shape.

[0011] The processing method includes: installing the bottom end of the petal-shaped threaded insert inside the insert of the front mold core, and installing the nut on the top end of the petal-shaped threaded insert; installing the front mold core and the insert of the front mold core inside the front template, installing the upper template on the upper end of the front template, and fixing the upper template to the upper table surface of the machine tool; installing the bottom end of the rear mold core threaded insert inside the insert of the rear mold core, and installing the screw on the top end of the rear mold core threaded insert; installing the rear mold core and the insert of the rear mold core inside the rear template, and fixing the rear template to the lower table surface of the machine tool; controlling the upper and lower table surfaces of the machine tool to close the upper and lower templates to form a mold cavity, injecting DMC material, and molding it into a DMC product, with the nut and screw fixed to the DMC product.

[0012] Further, insert the top end of the petal-shaped threaded insert into the bottom end of the insert of the front mold core, pass through the insert of the front mold core until the bottom ends of the petal-shaped threaded insert and the insert of the front mold core are flush, with the petal-shaped threaded insert exposed outside the top end of the insert of the front mold core. The bottom end of the petal-shaped threaded insert is clamped and contracted by an external force, generating an external tension to lock the petal-shaped threaded insert.

[0013] The structure of the present invention is simple, similar to the shape of a blooming flower, with low processing costs and no limitations on the steel material. Only ordinary steel is required. By using the structural techniques, during use, the petals can contract to form elasticity, ensuring no falling off, controlling material leakage and powdering, no wear of the mold core, etc., without mold jamming, controlling insert expansion and wear, with a high product qualification rate, greatly reducing the product production cost and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the open state of the petal-shaped threaded insert, Figure 2 is the contracted state of the petal-shaped threaded insert, Figure 3 is the front view of the mold.

[0015] Reference numerals in the drawings: 1 - upper template, 2 - front template, 3 - front mold core, 4 - DMC product, 5 - rear template, 6 - rear mold core, 7 - rear mold core threaded insert, 8 - insert of the rear mold core, 9 - nut, 10 - petal-shaped threaded insert, 11 - insert of the front mold core, 12 - screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solution of the present invention will be specifically described below with reference to the drawings.

[0017] The mold includes an upper template 1, a front template 2, a front mold core 3, a rear template 5, a rear mold core 6, a rear mold core threaded insert 7, an insert 8 of the rear mold core, a petal-shaped threaded insert 10, and an insert 11 of the front mold core.

[0018] The bottom end of the petal-shaped threaded insert 10 is made of an elastic material, such as ordinary steel, which has a low processing cost and no special requirements for the steel material. When not clamped by an external force, it opens into a petal shape, as shown in Figure 1 shown. When clamped by an external force, it shrinks into a cylindrical shape, as shown in Figure 2 shown.

[0019] Insert the top end of the petal-shaped threaded insert 10 into the bottom end of the insert 11 of the front mold core, pass through the insert of the front mold core until the bottom end of the petal-shaped threaded insert is flush with the bottom end of the insert of the front mold core. The petal-shaped threaded insert is exposed outside the top end of the insert of the front mold core. The bottom end of the petal-shaped threaded insert is clamped by an external force and shrinks, generating an external tension to lock the petal-shaped threaded insert. Using structural techniques, ensure that it does not fall off, control the expansion and wear of the insert, and install the nut 9 on the top end of the petal-shaped threaded insert.

[0020] Install the front mold core 3 and the insert 11 of the front mold core into the inside of the front template 2, install the upper template 1 on the upper end of the front template 2, and fix the upper template 1 to the upper table surface of the machine tool.

[0021] Install the bottom end of the rear mold core threaded insert 7 into the inside of the insert 8 of the rear mold core, and install the screw 12 on the top end of the rear mold core threaded insert.

[0022] Install the rear mold core 6 and the insert 8 of the rear mold core into the inside of the rear template 5, and fix the rear template 5 to the lower table surface of the machine tool.

[0023] Control the upper and lower table surfaces of the machine tool to close the upper and lower templates to form a mold cavity, as shown in Figure 3 shown. Inject DMC material, control the leakage powder, the mold core does not wear, and it is formed into a DMC product 4 without mold clamping phenomenon. The nut 9 and the screw 12 are fixed to the DMC product 4.

[0024] The above is an embodiment of the present invention, which does not limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A processing method for a DMC mold using petal-shaped threaded inserts, the mold comprising: Upper template, front template, front mold core, rear template, rear mold core, rear mold core threaded insert, rear mold core insert sub, petal-shaped threaded insert, front mold core insert sub; The upper template is installed at the upper end of the front template, and the rear template is located directly below the front template; The front mold core and the front mold core insert sub are installed inside the front template, and the rear mold core and the rear mold core insert sub are installed inside the rear template; The bottom end of the petal-shaped threaded insert is installed inside the front mold core insert sub, serving as the part buried in the front mold core insert sub, and the bottom end of the rear mold core threaded insert is installed inside the rear mold core insert sub, serving as the part buried in the rear mold core insert sub; The upper and lower templates are clamped to form a mold cavity, and the DMC product is formed inside the mold cavity; The petal-shaped threaded insert has an elastic material at the bottom end. When not clamped by an external force, it opens into a petal shape, and when clamped by an external force, it contracts into a cylindrical shape; It is characterized in that it includes: installing the bottom end of the petal-shaped threaded insert inside the front mold core insert sub: inserting the top end of the petal-shaped threaded insert into the bottom end of the front mold core insert sub, passing through the front mold core insert sub until the bottom end of the petal-shaped threaded insert is flush with the bottom end of the front mold core insert sub, and the petal-shaped threaded insert is exposed outside the top end of the front mold core insert sub. The bottom end of the petal-shaped threaded insert is clamped by an external force and contracts, generating an external tension to lock the petal-shaped threaded insert; Installing a nut on the top end of the petal-shaped threaded insert; Installing the front mold core and the front mold core insert sub inside the front template, installing the upper template at the upper end of the front template, and fixing the upper template to the upper table surface of the machine tool; Installing the bottom end of the rear mold core threaded insert inside the rear mold core insert sub, and installing a screw on the top end of the rear mold core threaded insert; Installing the rear mold core and the rear mold core insert sub inside the rear template, and fixing the rear template to the lower table surface of the machine tool; Controlling the upper and lower table surfaces of the machine tool to clamp the upper and lower templates to form a mold cavity, injecting DMC material, and forming it into a DMC product, with the nut and the screw fixed to the DMC product.

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