Internal floating inclined pulling mechanism for small plastic part

Abstract

The utility model relates to the technical field of small plastic parts, in particular to an internal floating inclined pulling mechanism for small plastic parts, which comprises an upper module and a lower module, a mold closing cylinder is arranged between the upper module and the lower module, an upper shaping mold is arranged on the upper module, a lower shaping mold is arranged on the lower module, and the internal floating inclined pulling mechanism for the small plastic parts further comprises an inclined pulling part, and the inclined pulling part is positioned between the upper module and the lower module, automatically performs inclined pulling during demolding under the elastic action of the elastic element, and is used for core pulling at the back-off position. According to the utility model, the inclined pulling part is arranged, so that the floating core automatically moves upwards under the action of the elastic force of the elastic element after losing the pressure of the mold closing cylinder, and the situation that the floating core damages a product subjected to injection molding due to pulling type core pulling in the demolding process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of small plastic parts, in particular to an internal floating oblique drawing mechanism for small plastic parts. Background Art

[0002] With the development of the plastics industry and the increasing use of plastic products in industrial production, plastic products are placing increasingly higher demands on mold technology. Specialized products require unique structures to produce them. As technology advances, the production technology level of plastic products must also improve accordingly. This requires the continuous exploration of new methods, technologies, and processes to enhance the mold manufacturing industry. A floating oblique withdrawal mechanism is essential for molding small plastic parts. However, when the floating core is obliquely withdrawn, it can easily scratch the finished molded part, causing irreversible damage to the finished part. This wastes material and requires additional time for repair, hindering production needs. In light of this, we propose a floating oblique withdrawal mechanism for small plastic parts. Utility Model Content

[0003] In order to make up for the above deficiencies, the utility model provides an internal floating oblique withdrawal mechanism for small plastic parts.

[0004] The technical solution of the utility model is:

[0005] A small plastic part internal floating oblique extraction mechanism includes an upper module and a lower module, a clamping cylinder is provided between the upper module and the lower module, an upper shaping mold is provided on the upper module, and a lower shaping mold is provided on the lower module, and further includes:

[0006] The oblique withdrawal portion is located between the upper module and the lower module. The oblique withdrawal portion is automatically obliquely withdrawn during demoulding due to the elastic action of the elastic element, and is used for core pulling at the inverted position.

[0007] Preferably, the oblique withdrawal portion includes two floating cores, and the two floating cores are symmetrically arranged above the lower module. The floating cores are inclined and have a hook-shaped bottom.

[0008] Preferably, two symmetrical limiting plates are provided on the lower module, limiting slots are provided in the limiting plates, and the notches of the two limiting slots are in opposite positions.

[0009] Preferably, the elastic element is a spring, and the spring is located in the limiting groove and connected to the floating core.

[0010] Preferably, the barb at the bottom of the floating core moves up and down along the groove wall of the limiting groove under the elastic force of the spring.

[0011] Preferably, the upper and lower ends of the mold clamping cylinder are set to be open, the upper shaping mold enters the mold clamping cylinder through the upper end of the mold clamping cylinder, and the lower shaping mold enters the mold clamping cylinder through the lower end of the mold clamping cylinder.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides an inclined withdrawal portion, so that the floating core automatically moves upward under the elastic force of the elastic element after losing the pressure of the mold clamping cylinder, thereby avoiding damage to the completed injection molded product caused by the floating core due to the pulling-type core withdrawal during the demoulding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 This is a schematic structural diagram of the limiting plate of the utility model.

[0017] In the figure: 1. Upper mold module; 2. Lower mold module; 3. Clamping cylinder; 4. Floating core; 5. Limit plate; Limit groove; 7. Spring; 8. Upper molding die; 9. Lower molding die. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] See also Figure 1-3 The present invention describes the above technical solution in detail through the following embodiments:

[0021] A floating oblique extraction mechanism for small plastic parts includes an upper module 1 and a lower module 2. A mold clamping cylinder 3 is provided between the upper module 1 and the lower module 2. The mold clamping cylinder 3 is fixedly connected to the upper module 1. The upper module 1 is provided with an upper shaping mold 8. The bottom end of the upper module 1 is fixedly connected to the upper shaping mold 8. The lower module 2 is provided with a lower shaping mold 9. The lower module 2 is fixedly connected to the lower shaping mold 9. The mechanism also includes:

[0022] The oblique withdrawal part is located between the upper module 1 and the lower module 2. The oblique withdrawal part automatically withdraws obliquely during demoulding through the elastic action of the elastic element, and is used for core pulling at the inverted position.

[0023] The oblique extraction section includes two floating cores 4, symmetrically positioned above the lower module 2. These cores are inclined and have barbed bottoms. The lower module 2 is equipped with two symmetrical stop plates 5, each with a stop slot defined within. The stop plates 5 are fixedly connected to the lower module 2, which has a groove defined at its bottom. The stop plates 5 are fixedly connected to the groove wall at the top of the lower module 2.

[0024] The elastic element is a spring 7, located within the retaining groove and connected to the floating core 4. The upper end of the spring 7 is fixedly connected to the floating core 4, while the lower end is fixedly connected to the wall of the retaining groove. The barbs at the bottom of the floating core 4 move up and down along the walls of the retaining groove under the elastic force of the spring 7. The upper and lower ends of the mold clamping cylinder 3 are designed to be open. The upper mold 8 enters the mold clamping cylinder 3 through the upper end, and the lower mold 9 enters the mold clamping cylinder 3 through the lower end.

[0025] During use, the upper module 1 drives the upper shaping mold 8 downward under the drive of the power source cylinder, and the mold clamping cylinder 3 connected to the upper module 1 also moves downward. When the mold clamping cylinder 3 contacts the lower shaping mold 9 on the lower module 2, the product in the mold clamping cylinder 3 is injection molded. At this time, the floating core 4 squeezes the spring 7 in the limit groove downward when the lower shaping mold 9 contacts the mold clamping cylinder 3. The spring 7 is deformed and the limit groove restricts the arbitrary movement of the floating core 4. After the injection molding is completed, the upper module 1 drives the upper shaping mold 8 upward and drives the mold clamping cylinder 3 upward at the same time. At this time, the floating core 4 automatically moves upward under the elastic force of the spring 7 after losing the pressure of the mold clamping cylinder 3, avoiding damage to the completed injection molded product due to the pulling-type core pulling during the demoulding process.

[0026] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A small plastic part internal floating oblique extraction mechanism, comprising an upper module (1) and a lower module (2), wherein a clamping cylinder (3) is provided between the upper module (1) and the lower module (2), an upper shaping mold (8) is provided on the upper module (1), and a lower shaping mold (9) is provided on the lower module (2), characterized in that: Also includes: An oblique withdrawal portion is located between the upper module (1) and the lower module (2). The oblique withdrawal portion automatically withdraws obliquely during demoulding through the elastic action of an elastic element, and is used for core pulling at an inverted position.

2. The internal floating oblique withdrawal mechanism for small plastic parts according to claim 1, characterized in that: The inclined withdrawal portion comprises a floating core (4), two floating cores (4) are provided and the two floating cores (4) are symmetrically arranged above the lower module (2), and the floating core (4) is inclined and has a hook-shaped bottom.

3. The internal floating oblique withdrawal mechanism for small plastic parts according to claim 2, characterized in that: Two symmetrical limiting plates (5) are provided on the lower module (2), and limiting slots (6) are provided in the limiting plates (5), with the notches of the two limiting slots (6) being in opposite positions.

4. The internal floating oblique withdrawal mechanism for small plastic parts according to claim 3, characterized in that: The elastic element is a spring (7), and the spring (7) is located in the limiting groove (6) and connected to the floating core (4).

5. The internal floating oblique withdrawal mechanism for small plastic parts according to claim 4, characterized in that: The barb at the bottom of the floating core (4) moves up and down along the groove wall of the limiting groove (6) under the elastic force of the spring (7).

6. The internal floating oblique withdrawal mechanism for small plastic parts according to claim 1, characterized in that: The upper and lower ends of the mold clamping cylinder (3) are set to be open, the upper shaping mold (8) enters the mold clamping cylinder (3) through the upper end of the mold clamping cylinder (3), and the lower shaping mold (9) enters the mold clamping cylinder (3) through the lower end of the mold clamping cylinder (3).

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