Double-pitched roof structure of plastic mold

Abstract

The double-pitched-top structure of the plastic mold comprises at least one pitched-top seat and two pitched-top heads which are symmetrically arranged, the pitched-top seat is provided with a T-shaped groove for the two pitched-top heads to slide, and the tail parts of the two pitched-top heads slide along the guide direction of the pitched-top seat through the T-shaped groove; inclined planes matched with the mold core are arranged at the rear parts of the inclined ejection heads, and the inclined ejection heads move relative to the inclined ejection seat through the matching of the inclined planes, so that the two inclined ejection heads are respectively subjected to core pulling in opposite transverse directions when the inclined ejection seat moves along the ejection direction, and synchronous core pulling and demolding of the double inclined ejectors are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould accessory, especially a plastic mould double-inclined top structure and belongs to the field of mechanical equipment manufacturing. BACKGROUND

[0002] Under the background of the rapid development of the mechanical manufacturing industry, as the core link of the industry, the development level of mould research and manufacture has a decisive influence on the entire processing manufacturing industry. With the continuous growth of market demand for product individualization, in addition to the practicability of products, consumers' requirements for appearance design and humanization are also increasingly improved, which promotes the evolution of mould manufacturing technology towards miniaturization, high-endization and rapidization.

[0003] The inclined top structure in the traditional mould usually adopts the design of one inclined top head matched with one inclined top seat. Although this design can meet the basic functional requirements, it gradually shows its limitations in modern manufacturing industry. Specifically, the traditional inclined top structure has the following problems:

[0004] Large space occupation: the combination mode of a single inclined top head and an inclined top seat makes the overall structure of the mould relatively large, limiting the effective use of the internal space of the mould.

[0005] Complex processing technology: due to the need to accurately match the positions of the inclined top head and the inclined top seat, more precise operations are involved in the processing process, increasing the processing difficulty.

[0006] High manufacturing cost: the complex structure and fine processing requirements lead to prolonged production cycle and increased material waste, ultimately increasing the manufacturing cost. INVENTION CONTENTS

[0007] The utility model aims at the problems existing in the prior art and provides a plastic mould double-inclined top structure which can control the core pulling of two inclined top heads and reduce the mould structure space.

[0008] In order to achieve the above purpose, the plastic mould double-inclined top structure of the utility model comprises at least one inclined top seat and two symmetrical inclined top heads, the inclined top seat is provided with a T-shaped groove for the sliding of the two inclined top heads, and the tail parts of the two inclined top heads slide along the guide direction of the inclined top seat through the T-shaped groove.

[0009] The rear part of the inclined top head is provided with a matching inclined surface of a mould core, and the movement of the inclined top head relative to the inclined top seat is matched through the inclined surface, so that the two inclined top heads are respectively pulled in opposite horizontal directions when the inclined top seat moves in the ejection direction, thereby realizing the synchronous core pulling and demoulding of the double-inclined top.

[0010] The present disclosure solves the problems of some product 360-degree undercut and the product cannot be demolded, the traditional inclined top structure occupies a large space on the mold, and the manufacturing cost is high, so the new type of plastic mold double inclined top structure is designed to realize the core pulling action of controlling two inclined top heads by one inclined top seat, so that the structure is small and simple, the movement space is small, the manufacturing cost is low, the structure is stable and reliable, the mold cost is reduced, the complex product is solved, the product can be smoothly demolded, the production cost is reduced, and the production efficiency is improved.

[0011] The preferred embodiment of the present utility model is:

[0012] Further, the inclined top seat (2) is fixed at the bottom of the push plate fixed plate (6), and is ejected along the Z positive direction under the action of the ejection rod of the injection molding machine, driving the relative movement of the two inclined top heads (1).

[0013] Further, the angle of the inclined surface of the two inclined top heads (1) is 5°, so that each inclined top head (1) moves about 3.5mm in the positive and negative directions of the X axis in the 40mm stroke of the ejection of the inclined top seat (2), thereby being greater than the predetermined undercut amount, and smoothly realizing core pulling and demolding.

[0014] Further, the inclined top head (1) and the inclined top seat (2) are both made of heat-treated mold steel material, with a hardness of HRC48-52, to improve the wear resistance and burnout resistance of the parts.

[0015] Further, the size of the inclined top seat (2) and the size and shape of the two inclined top heads (1) can be adjusted accordingly according to the mold requirements.

[0016] Further, the inclined top seat (2) is reliably fixed to the push plate fixed plate (6) by means of an internal hexagonal screw or other standard fasteners.

[0017] The present utility model has the beneficial effects that: compared with the traditional inclined top structure, the present utility model controls the core pulling action of two inclined top heads by one inclined top seat, significantly reduces the mold structure space, simplifies the structure design, reduces the processing complexity, and reduces the mold manufacturing cost. This innovative design is particularly suitable for solving the problem of product 360-degree undercut, making the demolding of complex products easier, improving the production efficiency, and reducing the production cost.

[0018] In addition, the double inclined top structure performs well in the following aspects:

[0019] Compactness: Since only one inclined top seat is used to control two inclined top heads, the overall structure is more compact, saving valuable mold space and suitable for application in product forming with strict space requirements.

[0020] Reliability: High-quality materials and precise manufacturing processes are used to ensure stability and durability over long periods of operation, reducing maintenance frequency and costs.

[0021] Economical: Reducing the number of components simplifies the production process, reduces raw material consumption and labor costs, effectively reducing total manufacturing costs.

[0022] Flexibility: The size and angle of the inclined ejector head can be adjusted according to different product requirements, flexibly meeting the molding needs of various products. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model will be further described below in combination with the drawings.

[0024] Figures 1.1 to 1.4 The figure is four views of the inclined ejector head.

[0025] Figures 2.1 to 2.4 The figure is four views of the inclined ejector seat.

[0026] Figures 3.1 to 3.5 The figure is five views of the double inclined ejector structure.

[0027] Figures 4.1 to 4.5 The figure is five views of the double inclined ejector structure after core-pulling is completed.

[0028] Figure 5 The figure is a trigonometric function calculation diagram of the core-pulling distance of the utility model.

[0029] Figure 6 The figure is an assembly diagram of the mold of the utility model.

[0030] Figure 7.1 And Figure 7.2 The figure is a schematic diagram of the movement relationship between the movable core and the inclined ejector head.

[0031] In the figure: 1 inclined ejector head, 2 inclined ejector seat, 3 movable core, 4 movable mold plate, 5 push plate, 6 push plate fixing plate, 7 movable mold seat plate, 8 product. DETAILED DESCRIPTION EMBODIMENT

[0032] The utility model will be further described below in combination with the drawings. A double inclined ejector structure of a plastic mold aims to optimize the space utilization of the traditional inclined ejector structure, simplify the processing technology, and reduce the manufacturing cost. The structure mainly consists of two identical inclined ejector heads 1, an inclined ejector seat 2, and a number of standard parts such as internal hexagonal screws.

[0033] Angled ejector head 1: Two identical pieces are made of heat-treated SKD61 mold steel with a hardness of HRC48-52 to ensure stability and wear resistance under high temperature and pressure conditions, preventing adhesion or wear during operation. The tail of the angled ejector head has a T-slot for sliding on the angled ejector seat 2; its back has a 5° inclined mounting platform that slides with the mating groove of the moving mold core 3 for product molding and undercut core-pulling actions. The design of the angled ejector head can be adjusted according to the size requirements of the mold to adapt to the molding requirements of different products.

[0034] Angled ejector 2: As the core component of the entire double-angled ejector structure, the head of the angled ejector is the product mounting position, serving not only a supporting role but also participating in the product molding and ejection process. It is fixed to the push plate fixing plate 6 and has an internal T-slot design, allowing the two angled ejectors to slide along a specific path within it. The angled ejector is also made of SKD61 mold steel, and after heat treatment, its hardness reaches HRC48-52, ensuring smooth movement and structural stability.

[0035] Hex socket screws: As standard parts, hex socket screws are used to fix the angled ejector seat 2, ensuring that it maintains a stable and reliable position throughout the injection molding process, and avoiding positional displacement due to vibration or other external forces, which would affect product quality.

[0036] Working principle and operation procedure: such as Figures 3, 4 As shown in Figures 5 and 6: After mold opening and ejection, the injection molding machine ejector pushes the ejector plate fixing plate 6. The ejector plate 5 and the ejector plate fixing plate 6 drive the inclined ejector seat 2 to move 40mm in the positive Z direction. Under the pushing force of the inclined ejector seat 2 in the positive Z direction, the two inclined ejector heads 1 operate in a mirror image, moving in the directions of negative 5 degrees in the positive Z direction and positive 5 degrees in the positive Z direction, respectively. According to the trigonometric function formula, the core pulling distance ÷ ejection height = tan5°. The ejection height is 40mm. Therefore, the core pulling distance of the two inclined ejector heads 1 sliding in the T-slot on the inclined ejector seat 2 is 3.5mm in the positive X direction and 3.5mm in the negative X direction, which is greater than the undercut amount of 1mm. Therefore, the inclined ejector heads 1 can smoothly pull the core, remove the part, close the mold, and complete one injection cycle. Compared with the traditional inclined ejector structure, this utility model has a double inclined ejector structure. The traditional inclined ejector structure requires two inclined ejector structures to pull the core separately, the inclined ejector head 1 is made larger, and the inclined ejector seat 2 becomes two, which increases the structural space, the processing technology is more complicated, and the mold manufacturing cost is higher. This utility model has a double inclined ejector structure for plastic molds. It uses one inclined ejector seat 2 to control the core pulling function of two inclined ejector heads 1, which greatly reduces the mold structural space. The structure is small and simple, with a small movement space, low manufacturing cost, stable and reliable structure, and reduces mold cost.

[0037] Advantages and application areas:

[0038] Compared with the traditional inclined top structure, the utility model discloses through one inclined top seat control two inclined top head's core pulling action, remarkably reduced mould structure space, simplified structure design, reduced processing complexity, reduced mould manufacturing cost.This kind of innovative design is especially applicable to solve the product perimeter 360 degrees reverse buckling problem, make the complex product demoulding become easier, improve production efficiency, reduce production cost.

[0039] In addition, the double inclined top structure is excellent in the following aspects:

[0040] Compactness: Since only one inclined top seat is used to control two inclined top heads, the overall structure is more compact, saving valuable mold space, suitable for application to products with strict space requirements.

[0041] Reliability: High-quality materials and precision manufacturing processes are used to ensure stability and durability over long periods of time, reducing maintenance frequency and cost.

[0042] Economical: Reducing the number of components simplifies the production process, reduces raw material consumption and labor costs, effectively reducing total manufacturing costs.

[0043] Flexibility: The size and angle of the inclined top head can be adjusted according to different product requirements, flexibly meeting the molding needs of various products.

[0044] Application examples: In actual application, the utility model has been successfully applied to the production of plastic products in many fields, including but not limited to automotive interior parts, electronic product housings, medical device components, etc. For example, in the instrument panel production line of an automobile manufacturer, the double inclined top structure of the utility model effectively solves the complex reverse buckling problem of the instrument panel edge, realizing efficient production on the automated production line. Compared with the traditional inclined top structure used before, the new structure not only significantly shortens the production cycle, but also significantly improves product quality and consistency, receiving consistent praise from customers.

[0045] In addition to the above embodiments, the utility model can also have other implementation manners. Any technical solution formed by equivalent substitution or equivalent transformation falls within the protection requirements of the utility model.

Claims

1. A double-sloping-top structure for a plastic mold, characterized in that: It includes at least one inclined top seat (2) and two symmetrically arranged inclined top heads (1). The inclined top seat (2) is provided with a T-shaped groove for sliding of the two inclined top heads (1). The tails of the two inclined top heads (1) slide along the guide direction of the inclined top seat (2) through the T-shaped groove. The rear part of the inclined ejector (1) is provided with an inclined surface that matches the mold core (3). The movement of the inclined ejector (1) relative to the inclined ejector seat (2) is achieved by the inclined surface matching so that the two inclined ejectors (1) pull the core in opposite lateral directions when the inclined ejector seat (2) moves in the ejection direction, thereby realizing the synchronous core pulling and demolding of the double inclined ejectors.

2. The double-sloping-top structure for plastic molds according to claim 1, characterized in that: The bottom of the inclined top seat (2) is fixed on the push plate fixing plate (6), and under the action of the injection molding machine push rod, it is pushed out in the positive Z direction, which drives the two inclined top heads (1) to move relative to each other.

3. The double-sloping-top structure for plastic molds according to claim 1 or 2, characterized in that: The angle of the two inclined ejector heads (1) is 5°. During the 40mm stroke of the inclined ejector seat (2), each inclined ejector head (1) moves 3.5mm in the positive and negative directions of the X-axis, which is greater than the predetermined undercut amount, so as to successfully achieve core pulling and demolding.

4. The double-sloping-top structure for plastic molds according to any one of claims 1 or 2, characterized in that: Both the inclined mandrel (1) and the inclined mandrel base (2) are made of heat-treated mold steel with a hardness of HRC48-52 to improve the wear resistance and anti-burning performance of the parts.

5. The double-sloping-top structure for plastic molds according to any one of claims 1 or 2, characterized in that: The dimensions of the inclined top seat (2) and the size and shape of the two inclined top heads (1) can be adjusted according to the mold requirements.

6. The double-sloping-top structure for plastic molds according to any one of claims 1 or 2, characterized in that: The inclined top seat (2) is reliably fixed to the push plate fixing plate (6) by internal hex screws.

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