CN210363084U

CN210363084U - Anti-eccentricity structure of single-pass tubular plastic product

Info

Publication number: CN210363084U
Application number: CN201920950747.1U
Authority: CN
Inventors: 陶强
Original assignee: Dongguan Qinke Plastic Products Co ltd
Current assignee: Dongguan Qinke Plastic Products Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-04-21
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses a single lead to pipe form plastic goods prevent off-centre, prevent off-centre structure including setting up the inboard boss in single lead to pipe form plastic goods blind end, the boss is on a parallel with the pipe wall direction setting of single lead to pipe form plastic goods, the boss is the columnar body. In order to ensure that the inner lug boss and the composite lug boss of the single-pass tubular plastic product are easy to demould in the injection molding process, the lug boss can be preferably arranged into a conical column body, and the cross section of the lug boss can be arranged into a circle, a triangle, a rectangle and a polygon. Prevent eccentric structure is applicable to single logical tubulose plastic circular tube, rectangular pipe, hexagonal arris pipe or multilateral venturi tube.

Description

Anti-eccentricity structure of single-pass tubular plastic product

Technical Field

The utility model discloses eccentric structure is prevented to single expert tubulose plastic products relates to the injection molding process goods field, in particular to eccentric structure is prevented to single expert's tubulose plastic products's inside.

Background

At present, single-channel tubular thin-wall plastic products such as various plastic pen shells are generally manufactured by adopting an injection molding process, and the specific process mode is as follows: a male mold insert is arranged in the mold and is inserted into a cavity of a male mold core of the mold. When the product is manufactured, firstly, plastic is put into an injection molding machine to be melted into liquid plastic at high temperature, and then the liquid plastic is injected into a forming cavity through the injection molding machine, namely the product glue position.

The single-pass tubular thin-wall plastic product molded in the above manner often has some defects, and referring to fig. 1, because the male mold insert is a guide point without a fixed front end, when liquid plastic is injected into the molding cavity by the injection molding machine, the male mold insert can shift in a hollow cavity of the male mold insert under the impact of high-pressure liquid plastic, so that the wall thickness of the molded product is uneven.

When the cooling water channel is arranged in the middle of the male mold insert and is in a columnar cavity or the length of the male mold insert is longer, the shaking and the deviation of the front end of the male mold insert are more serious during injection molding. Not only glue the heart off normal position easily and lead to the uneven defective products that appear of product wall thickness, the public mould goes into son front end and appears distorting when serious and influence subsequent drawing of patterns operation.

Disclosure of Invention

In order to solve the problem, the utility model provides a prevent eccentric structure for solving single-pass tubulose thin wall plastic products eccentric wall thickness inequality appears when moulding plastics. The utility model discloses single-channel tubulose plastic products's anti-eccentricity structure realizes like this.

Specifically, the anti-eccentricity structure comprises a boss arranged on the inner side of the closed end of the single-pass tubular plastic product,

the boss is arranged in parallel to the direction of the pipe wall of the single-pass tubular plastic product, and the boss is a columnar body.

Specifically, prevent eccentric structure still including setting up the compound boss in the single-pass tubulose plastic products blind end outside, compound boss includes the recess and sets up the awl boss in the recess, awl boss are on a parallel with the pipe wall direction setting of single-pass tubulose plastic products. The groove is columnar.

Preferably, in order to enable the inner boss and the composite boss of the single-pass tubular plastic product to be easily demoulded in the injection molding process, the boss and the groove can be preferably arranged into a conical column body.

Specifically, the cross sections of the grooves of the lug boss and the composite lug boss can be set to be circular, triangular, rectangular and polygonal.

Specifically, the eccentricity-preventing structure is suitable for plastic circular tubes, rectangular tubes, hexagonal tubes or polygonal tubes.

The utility model discloses its profitable effect of single-channel tubulose plastic product's anti-decentration structure is. The boss and the composite boss of the anti-eccentricity structure have the function of positioning the male mold insert in the cavity of the mold when the single-pass tubular plastic product is subjected to injection molding, and can effectively solve the problem of shaking and deviation of the front end of the male mold insert, so that the wall thickness of the single-pass tubular plastic product is uniform.

Drawings

FIG. 1 is a schematic diagram of the background process and the mold of the anti-eccentricity structure of the single-pass tubular plastic product of the present invention

FIG. 2 is a schematic diagram of the inner boss process and mold of the anti-eccentric structure of the single-pass tubular plastic product of the present invention

FIG. 3 is a schematic view of the anti-eccentric structure of the single-channel tubular plastic product, the inner boss and the outer composite boss thereof, and the mold

FIG. 4 is a schematic view of the anti-eccentric structure of the single-pass tubular plastic product of the present invention, showing an inner circular boss thereof

FIG. 5 is a schematic view of the anti-eccentric structure of the single-pass tubular plastic product with the triangular boss therein

FIG. 6 is a schematic view of the anti-eccentric structure of the single-pass tubular plastic product with a rectangular boss therein

FIG. 7 is a schematic view of the anti-eccentric structure of the single-pass tubular plastic product with polygonal bosses

FIG. 8 is a schematic cross-sectional view of the inner boss and the outer composite boss of the anti-eccentric structure of the single-pass tubular plastic product of the present invention

FIG. 9 is a schematic view of the eccentric-proof structure of the single-pass tubular plastic product with the external composite boss of the present invention

9-1, 9-5 are schematic diagrams of circular external composite bosses

9-2 schematic diagram of triangular outer composite boss

9-3 is a schematic view of a rectangular outer composite boss

9-4 are schematic diagrams of polygonal outer composite bosses.

Detailed Description

The utility model discloses single-channel tubulose plastic products's anti-decentration structure, its concrete structure, shape and implementation mode are as follows.

Specifically, the anti-eccentricity structure shown in fig. 4 to 7 includes a boss 11 disposed on the inner side of the closed end of the single-pass tubular plastic product 1, and the boss 11 is disposed parallel to the tube wall of the single-pass tubular plastic product 1. The boss 11 is a cylindrical body.

In order to make the inner boss 11 of the one-way tubular plastic product 1 easy to be demolded during the injection molding process, the boss 11 shown in fig. 8 can be preferably configured as a cone-shaped cylinder.

The boss 11 shown in fig. 4 may be provided with a circular cross-section. Fig. 5 shows a cross section of the boss 11

The faces may be arranged in a triangle. The boss 11 shown in fig. 6 may be provided with a rectangular cross section. The boss 11 shown in fig. 7 may be provided in a polygonal shape in cross section.

For further strengthening the utility model discloses a single-pass tubular plastic product's its location effect at the mould in-process of moulding plastics of preventing eccentric structure.

Specifically, the anti-eccentricity structure shown in fig. 9 further includes a composite boss 12 disposed outside the closed end of the single-pass tubular plastic product 1, where the composite boss 12 includes a groove 12a and a cone boss disposed in the groove 12a

12b, the groove 12a and the conical boss 12b are arranged in parallel to the direction of the pipe wall of the single-pass tubular plastic product 1. The groove 12a is cylindrical.

In order to make the outer composite boss 12 of the one-way tubular plastic product 1 easy to be demolded during the injection molding process, the groove 12a shown in fig. 8 is preferably provided in a tapered column shape.

The grooves 12a shown in fig. 9-1, 9-5 may be provided with a circular cross-section. The grooves 12a shown in fig. 9-2 may be arranged triangular in cross-section. The grooves 12a shown in fig. 9-3 may be arranged rectangular in cross-section. The grooves 12a shown in fig. 9-4 may be arranged in a polygonal cross-section.

As shown in fig. 4-7, the single-pass tubular plastic product 1 of the present invention is a circular plastic tube. The single-pass tubular plastic product 1 shown in fig. 9-3 is a rectangular tube. The single-pass tubular plastic product 1 shown in fig. 9-3 is a hexagonal tube or a polygonal tube.

The anti-eccentric structure of the single-way tubular plastic product realizes the injection molding process of the single-way tubular plastic product.

1) The function of the anti-eccentricity structure boss 11 and the forming step thereof.

The single-pass tubular plastic product injection mold shown in fig. 2 mainly comprises a cavity insert 2, a front core insert 3, a rear core insert 4 and a core insert 5, wherein the core insert 5 is inserted into an inner cavity formed by the front core insert 3 and the rear core insert 4 after mold closing. The clearance between the male die insert 5 and the cavity inside the female die core 2, the front male die core 3 and the rear male die core 4 is the product glue position of the single-pass tubular plastic product 1. The male mold insert 5 is a columnar cavity body with a cooling water channel 51 in the middle, and a groove 52 is formed at the foremost end of the male mold insert.

After the injection molding machine shown in fig. 2 is closed, the rubber material is injected into the rubber position cavity of the mold through the mold nozzle 6, and the rubber material injected into the rubber position cavity of the mold firstly enters the male mold insert 5, and the front end of the male mold insert is provided with the groove 52. When the glue in the groove 52 of the male die insert 5 overflows, the glue is continuously poured forward along the glue position of the single-channel tubular plastic product 1 under the action of pressure, and the glue which is firstly poured into the groove 52 of the male die insert 5 plays a role in positioning the male die insert 4 in the cavities of the front male die core 3 and the rear male die core 4. After the product is demoulded, the glue injected into the groove 52 at the front end of the male mould insert 5 forms the boss 11 of the single-pass tubular plastic product 1, and the boss 11 forms the anti-eccentric structure of the single-pass tubular plastic product.

2) The function of the anti-eccentricity structure boss 11 and the composite boss 12 and the forming steps of the two.

The single-pass tubular plastic product injection mold shown in fig. 3 mainly comprises a cavity insert 2, a front core insert 3, a rear core insert 4 and a core insert 5, wherein the core insert 5 is inserted into an inner cavity formed by the front core insert 3 and the rear core insert 4 after mold closing. The clearance between the male die insert 4 and the cavity inside the female die core 2, the front male die core 3 and the rear male die core 4 is the product glue position of the single-pass tubular plastic product 1. The male mold insert 5 is a columnar cavity body with a cooling water channel 51 in the middle, and a groove 52 is formed at the foremost end of the male mold insert. The connecting end surface of the female die core 2 and the front male die core 3 is provided with a pair of tenons 21.

After the injection molding machine shown in fig. 3 is closed, the glue material is injected into the glue position cavity of the mold through the mold nozzle 6, the glue material injected into the glue position cavity of the mold firstly enters the gap between the pair of tenons 21 of the cavity insert 2 and the groove 52 formed at the front end of the male mold insert 5, when the glue material in the groove 52 of the male mold insert 5 is full, the glue material enters the glue material under the action of pressure and is continuously poured forwards along the product glue position of the single-channel tubular plastic product 1, and the glue material firstly entering the gap between the pair of tenons 21 of the cavity insert 2 and the groove 52 of the male mold insert 5 plays a role in positioning the cavity of the male mold insert 4 in the front cavity insert 3 and the rear cavity insert 4.

After the product is demoulded, firstly injecting the sizing material into the gap between the pair of tenons 21 of the female die core 2 to form the composite boss 12 conical boss 12b of the single-pass tubular plastic product 1, forming the groove 12a by the pair of tenons 21 of the female die core 2, and forming the boss 11 of the single-pass tubular plastic product 1 by injecting the sizing material into the groove 52 at the front end of the male die insert 5. The boss 11 and the composite boss 12 form an anti-eccentricity structure of the single-pass tubular plastic product.

The above is the utility model provides a single-pass tubular plastic products's detailed introduction of preventing eccentric structure to general technical personnel in this field, according to the utility model discloses the thought all has the change part on concrete implementation and range of application. In summary, the content of the present specification should not be understood as a limitation of the present invention, and any changes made according to the design concept of the present invention are all within the protection scope of the present invention.

Claims

1. The anti-eccentricity structure of the single-pass tubular plastic product is characterized by comprising a boss (11) arranged on the inner side of the closed end of the single-pass tubular plastic product (1), wherein the boss (11) is arranged in a direction parallel to the pipe wall of the single-pass tubular plastic product (1).

2. The anti-eccentricity structure for a single-pass tubular plastic product as claimed in claim 1, wherein the boss (11) is configured as a cylinder or a conical cylinder.

3. The anti-eccentricity structure for a single-pass tubular plastic product as claimed in claim 1 or 2, wherein the boss (11) is configured to be circular or triangular in cross section.

4. The anti-eccentricity structure for a single-pass tubular plastic part as claimed in claim 1 or 2, wherein the boss (11) is rectangular or polygonal in cross section.

5. The anti-eccentricity structure for the single-pass tubular plastic product as claimed in claim 1, further comprising a composite boss (12) disposed outside the closed end of the single-pass tubular plastic product (1), wherein the composite boss (12) comprises a groove (12 a) and a conical boss (12 b) disposed in the groove (12 a), and the groove (12 a) and the conical boss (12 b) are disposed in parallel to the direction of the tube wall of the single-pass tubular plastic product (1).

6. The anti-eccentricity structure for a single-pass tubular plastic product as claimed in claim 5, wherein the grooves (12 a) are arranged in a cylindrical or conical shape.

7. The anti-eccentricity structure for a single-pass tubular plastic part as claimed in claim 5 or 6, wherein the grooves (12 a) are circular or triangular in cross section.

8. The anti-eccentricity structure for a single-pass tubular plastic part as claimed in claim 5 or 6, wherein the grooves (12 a) are rectangular or polygonal in cross section.

9. The anti-eccentricity structure for a single-pass tubular plastic product as claimed in claim 1 or 5, wherein the single-pass tubular plastic product (1) is a circular tube or a rectangular tube.

10. The anti-eccentricity structure for a single-pass tubular plastic product as claimed in claim 1 or 5, wherein the single-pass tubular plastic product (1) is a polygonal tube or a hexagonal tube.